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
),
141 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
142 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
143 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
146 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
147 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
149 /* GNU extension to record C++ vtable hierarchy. */
150 HOWTO (R_386_GNU_VTINHERIT
, /* type */
152 2, /* size (0 = byte, 1 = short, 2 = long) */
154 FALSE
, /* pc_relative */
156 complain_overflow_dont
, /* complain_on_overflow */
157 NULL
, /* special_function */
158 "R_386_GNU_VTINHERIT", /* name */
159 FALSE
, /* partial_inplace */
162 FALSE
), /* pcrel_offset */
164 /* GNU extension to record C++ vtable member usage. */
165 HOWTO (R_386_GNU_VTENTRY
, /* type */
167 2, /* size (0 = byte, 1 = short, 2 = long) */
169 FALSE
, /* pc_relative */
171 complain_overflow_dont
, /* complain_on_overflow */
172 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
173 "R_386_GNU_VTENTRY", /* name */
174 FALSE
, /* partial_inplace */
177 FALSE
) /* pcrel_offset */
179 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
183 #ifdef DEBUG_GEN_RELOC
185 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
190 static reloc_howto_type
*
191 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
192 bfd_reloc_code_real_type code
)
197 TRACE ("BFD_RELOC_NONE");
198 return &elf_howto_table
[R_386_NONE
];
201 TRACE ("BFD_RELOC_32");
202 return &elf_howto_table
[R_386_32
];
205 TRACE ("BFD_RELOC_CTOR");
206 return &elf_howto_table
[R_386_32
];
208 case BFD_RELOC_32_PCREL
:
209 TRACE ("BFD_RELOC_PC32");
210 return &elf_howto_table
[R_386_PC32
];
212 case BFD_RELOC_386_GOT32
:
213 TRACE ("BFD_RELOC_386_GOT32");
214 return &elf_howto_table
[R_386_GOT32
];
216 case BFD_RELOC_386_PLT32
:
217 TRACE ("BFD_RELOC_386_PLT32");
218 return &elf_howto_table
[R_386_PLT32
];
220 case BFD_RELOC_386_COPY
:
221 TRACE ("BFD_RELOC_386_COPY");
222 return &elf_howto_table
[R_386_COPY
];
224 case BFD_RELOC_386_GLOB_DAT
:
225 TRACE ("BFD_RELOC_386_GLOB_DAT");
226 return &elf_howto_table
[R_386_GLOB_DAT
];
228 case BFD_RELOC_386_JUMP_SLOT
:
229 TRACE ("BFD_RELOC_386_JUMP_SLOT");
230 return &elf_howto_table
[R_386_JUMP_SLOT
];
232 case BFD_RELOC_386_RELATIVE
:
233 TRACE ("BFD_RELOC_386_RELATIVE");
234 return &elf_howto_table
[R_386_RELATIVE
];
236 case BFD_RELOC_386_GOTOFF
:
237 TRACE ("BFD_RELOC_386_GOTOFF");
238 return &elf_howto_table
[R_386_GOTOFF
];
240 case BFD_RELOC_386_GOTPC
:
241 TRACE ("BFD_RELOC_386_GOTPC");
242 return &elf_howto_table
[R_386_GOTPC
];
244 /* These relocs are a GNU extension. */
245 case BFD_RELOC_386_TLS_TPOFF
:
246 TRACE ("BFD_RELOC_386_TLS_TPOFF");
247 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
249 case BFD_RELOC_386_TLS_IE
:
250 TRACE ("BFD_RELOC_386_TLS_IE");
251 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
253 case BFD_RELOC_386_TLS_GOTIE
:
254 TRACE ("BFD_RELOC_386_TLS_GOTIE");
255 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
257 case BFD_RELOC_386_TLS_LE
:
258 TRACE ("BFD_RELOC_386_TLS_LE");
259 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
261 case BFD_RELOC_386_TLS_GD
:
262 TRACE ("BFD_RELOC_386_TLS_GD");
263 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
265 case BFD_RELOC_386_TLS_LDM
:
266 TRACE ("BFD_RELOC_386_TLS_LDM");
267 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
270 TRACE ("BFD_RELOC_16");
271 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
273 case BFD_RELOC_16_PCREL
:
274 TRACE ("BFD_RELOC_16_PCREL");
275 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
278 TRACE ("BFD_RELOC_8");
279 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
281 case BFD_RELOC_8_PCREL
:
282 TRACE ("BFD_RELOC_8_PCREL");
283 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
285 /* Common with Sun TLS implementation. */
286 case BFD_RELOC_386_TLS_LDO_32
:
287 TRACE ("BFD_RELOC_386_TLS_LDO_32");
288 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
290 case BFD_RELOC_386_TLS_IE_32
:
291 TRACE ("BFD_RELOC_386_TLS_IE_32");
292 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
294 case BFD_RELOC_386_TLS_LE_32
:
295 TRACE ("BFD_RELOC_386_TLS_LE_32");
296 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
298 case BFD_RELOC_386_TLS_DTPMOD32
:
299 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
300 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
302 case BFD_RELOC_386_TLS_DTPOFF32
:
303 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
304 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
306 case BFD_RELOC_386_TLS_TPOFF32
:
307 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
308 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
310 case BFD_RELOC_386_TLS_GOTDESC
:
311 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
312 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
314 case BFD_RELOC_386_TLS_DESC_CALL
:
315 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
316 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
318 case BFD_RELOC_386_TLS_DESC
:
319 TRACE ("BFD_RELOC_386_TLS_DESC");
320 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
322 case BFD_RELOC_386_IRELATIVE
:
323 TRACE ("BFD_RELOC_386_IRELATIVE");
324 return &elf_howto_table
[R_386_IRELATIVE
];
326 case BFD_RELOC_VTABLE_INHERIT
:
327 TRACE ("BFD_RELOC_VTABLE_INHERIT");
328 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
330 case BFD_RELOC_VTABLE_ENTRY
:
331 TRACE ("BFD_RELOC_VTABLE_ENTRY");
332 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
342 static reloc_howto_type
*
343 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
348 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
349 if (elf_howto_table
[i
].name
!= NULL
350 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
351 return &elf_howto_table
[i
];
356 static reloc_howto_type
*
357 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
361 if ((indx
= r_type
) >= R_386_standard
362 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
363 >= R_386_ext
- R_386_standard
)
364 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
365 >= R_386_irelative
- R_386_ext
)
366 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
367 >= R_386_vt
- R_386_irelative
))
369 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
373 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
374 return &elf_howto_table
[indx
];
378 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
380 Elf_Internal_Rela
*dst
)
382 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
383 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
386 /* Return whether a symbol name implies a local label. The UnixWare
387 2.1 cc generates temporary symbols that start with .X, so we
388 recognize them here. FIXME: do other SVR4 compilers also use .X?.
389 If so, we should move the .X recognition into
390 _bfd_elf_is_local_label_name. */
393 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
395 if (name
[0] == '.' && name
[1] == 'X')
398 return _bfd_elf_is_local_label_name (abfd
, name
);
401 /* Support for core dump NOTE sections. */
404 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
409 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
411 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
417 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
420 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
424 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
428 switch (note
->descsz
)
433 case 144: /* Linux/i386 */
435 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
438 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
448 /* Make a ".reg/999" section. */
449 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
450 size
, note
->descpos
+ offset
);
454 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
456 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
458 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
463 elf_tdata (abfd
)->core_program
464 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
465 elf_tdata (abfd
)->core_command
466 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
470 switch (note
->descsz
)
475 case 124: /* Linux/i386 elf_prpsinfo. */
476 elf_tdata (abfd
)->core_program
477 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
478 elf_tdata (abfd
)->core_command
479 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
483 /* Note that for some reason, a spurious space is tacked
484 onto the end of the args in some (at least one anyway)
485 implementations, so strip it off if it exists. */
487 char *command
= elf_tdata (abfd
)->core_command
;
488 int n
= strlen (command
);
490 if (0 < n
&& command
[n
- 1] == ' ')
491 command
[n
- 1] = '\0';
497 /* Functions for the i386 ELF linker.
499 In order to gain some understanding of code in this file without
500 knowing all the intricate details of the linker, note the
503 Functions named elf_i386_* are called by external routines, other
504 functions are only called locally. elf_i386_* functions appear
505 in this file more or less in the order in which they are called
506 from external routines. eg. elf_i386_check_relocs is called
507 early in the link process, elf_i386_finish_dynamic_sections is
508 one of the last functions. */
511 /* The name of the dynamic interpreter. This is put in the .interp
514 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
516 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
517 copying dynamic variables from a shared lib into an app's dynbss
518 section, and instead use a dynamic relocation to point into the
520 #define ELIMINATE_COPY_RELOCS 1
522 /* The size in bytes of an entry in the procedure linkage table. */
524 #define PLT_ENTRY_SIZE 16
526 /* The first entry in an absolute procedure linkage table looks like
527 this. See the SVR4 ABI i386 supplement to see how this works.
528 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
530 static const bfd_byte elf_i386_plt0_entry
[12] =
532 0xff, 0x35, /* pushl contents of address */
533 0, 0, 0, 0, /* replaced with address of .got + 4. */
534 0xff, 0x25, /* jmp indirect */
535 0, 0, 0, 0 /* replaced with address of .got + 8. */
538 /* Subsequent entries in an absolute procedure linkage table look like
541 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
543 0xff, 0x25, /* jmp indirect */
544 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
545 0x68, /* pushl immediate */
546 0, 0, 0, 0, /* replaced with offset into relocation table. */
547 0xe9, /* jmp relative */
548 0, 0, 0, 0 /* replaced with offset to start of .plt. */
551 /* The first entry in a PIC procedure linkage table look like this.
552 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
554 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
556 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
557 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
560 /* Subsequent entries in a PIC procedure linkage table look like this. */
562 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
564 0xff, 0xa3, /* jmp *offset(%ebx) */
565 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
566 0x68, /* pushl immediate */
567 0, 0, 0, 0, /* replaced with offset into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt. */
572 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
573 for the PLTResolve stub and then for each PLT entry. */
574 #define PLTRESOLVE_RELOCS_SHLIB 0
575 #define PLTRESOLVE_RELOCS 2
576 #define PLT_NON_JUMP_SLOT_RELOCS 2
578 /* The i386 linker needs to keep track of the number of relocs that it
579 decides to copy as dynamic relocs in check_relocs for each symbol.
580 This is so that it can later discard them if they are found to be
581 unnecessary. We store the information in a field extending the
582 regular ELF linker hash table. */
584 struct elf_i386_dyn_relocs
586 struct elf_i386_dyn_relocs
*next
;
588 /* The input section of the reloc. */
591 /* Total number of relocs copied for the input section. */
594 /* Number of pc-relative relocs copied for the input section. */
595 bfd_size_type pc_count
;
598 /* i386 ELF linker hash entry. */
600 struct elf_i386_link_hash_entry
602 struct elf_link_hash_entry elf
;
604 /* Track dynamic relocs copied for this symbol. */
605 struct elf_i386_dyn_relocs
*dyn_relocs
;
607 #define GOT_UNKNOWN 0
611 #define GOT_TLS_IE_POS 5
612 #define GOT_TLS_IE_NEG 6
613 #define GOT_TLS_IE_BOTH 7
614 #define GOT_TLS_GDESC 8
615 #define GOT_TLS_GD_BOTH_P(type) \
616 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
617 #define GOT_TLS_GD_P(type) \
618 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
619 #define GOT_TLS_GDESC_P(type) \
620 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
621 #define GOT_TLS_GD_ANY_P(type) \
622 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
623 unsigned char tls_type
;
625 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
626 starting at the end of the jump table. */
630 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
632 struct elf_i386_obj_tdata
634 struct elf_obj_tdata root
;
636 /* tls_type for each local got entry. */
637 char *local_got_tls_type
;
639 /* GOTPLT entries for TLS descriptors. */
640 bfd_vma
*local_tlsdesc_gotent
;
643 #define elf_i386_tdata(abfd) \
644 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
646 #define elf_i386_local_got_tls_type(abfd) \
647 (elf_i386_tdata (abfd)->local_got_tls_type)
649 #define elf_i386_local_tlsdesc_gotent(abfd) \
650 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
652 #define is_i386_elf(bfd) \
653 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
654 && elf_tdata (bfd) != NULL \
655 && elf_object_id (bfd) == I386_ELF_TDATA)
658 elf_i386_mkobject (bfd
*abfd
)
660 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
664 /* i386 ELF linker hash table. */
666 struct elf_i386_link_hash_table
668 struct elf_link_hash_table elf
;
670 /* Short-cuts to get to dynamic linker sections. */
682 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
685 /* True if the target system is VxWorks. */
688 /* Value used to fill the last word of the first plt entry. */
689 bfd_byte plt0_pad_byte
;
691 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
692 bfd_vma next_tls_desc_index
;
695 bfd_signed_vma refcount
;
699 /* The amount of space used by the reserved portion of the sgotplt
700 section, plus whatever space is used by the jump slots. */
701 bfd_vma sgotplt_jump_table_size
;
703 /* Small local sym to section mapping cache. */
704 struct sym_sec_cache sym_sec
;
706 /* _TLS_MODULE_BASE_ symbol. */
707 struct bfd_link_hash_entry
*tls_module_base
;
710 /* Get the i386 ELF linker hash table from a link_info structure. */
712 #define elf_i386_hash_table(p) \
713 ((struct elf_i386_link_hash_table *) ((p)->hash))
715 #define elf_i386_compute_jump_table_size(htab) \
716 ((htab)->next_tls_desc_index * 4)
718 /* Create an entry in an i386 ELF linker hash table. */
720 static struct bfd_hash_entry
*
721 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
722 struct bfd_hash_table
*table
,
725 /* Allocate the structure if it has not already been allocated by a
729 entry
= bfd_hash_allocate (table
,
730 sizeof (struct elf_i386_link_hash_entry
));
735 /* Call the allocation method of the superclass. */
736 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
739 struct elf_i386_link_hash_entry
*eh
;
741 eh
= (struct elf_i386_link_hash_entry
*) entry
;
742 eh
->dyn_relocs
= NULL
;
743 eh
->tls_type
= GOT_UNKNOWN
;
744 eh
->tlsdesc_got
= (bfd_vma
) -1;
750 /* Create an i386 ELF linker hash table. */
752 static struct bfd_link_hash_table
*
753 elf_i386_link_hash_table_create (bfd
*abfd
)
755 struct elf_i386_link_hash_table
*ret
;
756 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
758 ret
= bfd_malloc (amt
);
762 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
763 elf_i386_link_hash_newfunc
,
764 sizeof (struct elf_i386_link_hash_entry
)))
780 ret
->tls_ldm_got
.refcount
= 0;
781 ret
->next_tls_desc_index
= 0;
782 ret
->sgotplt_jump_table_size
= 0;
783 ret
->sym_sec
.abfd
= NULL
;
785 ret
->srelplt2
= NULL
;
786 ret
->plt0_pad_byte
= 0;
787 ret
->tls_module_base
= NULL
;
789 return &ret
->elf
.root
;
792 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
793 shortcuts to them in our hash table. */
796 elf_i386_create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
798 struct elf_i386_link_hash_table
*htab
;
800 if (! _bfd_elf_create_got_section (dynobj
, info
))
803 htab
= elf_i386_hash_table (info
);
804 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
805 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
806 if (!htab
->sgot
|| !htab
->sgotplt
)
809 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
810 (SEC_ALLOC
| SEC_LOAD
815 if (htab
->srelgot
== NULL
816 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
821 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
822 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
826 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
828 struct elf_i386_link_hash_table
*htab
;
830 htab
= elf_i386_hash_table (info
);
831 if (!htab
->sgot
&& !elf_i386_create_got_section (dynobj
, info
))
834 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
837 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
838 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
839 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
841 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
843 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
844 || (!info
->shared
&& !htab
->srelbss
))
848 && !elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
854 /* Copy the extra info we tack onto an elf_link_hash_entry. */
857 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
858 struct elf_link_hash_entry
*dir
,
859 struct elf_link_hash_entry
*ind
)
861 struct elf_i386_link_hash_entry
*edir
, *eind
;
863 edir
= (struct elf_i386_link_hash_entry
*) dir
;
864 eind
= (struct elf_i386_link_hash_entry
*) ind
;
866 if (eind
->dyn_relocs
!= NULL
)
868 if (edir
->dyn_relocs
!= NULL
)
870 struct elf_i386_dyn_relocs
**pp
;
871 struct elf_i386_dyn_relocs
*p
;
873 /* Add reloc counts against the indirect sym to the direct sym
874 list. Merge any entries against the same section. */
875 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
877 struct elf_i386_dyn_relocs
*q
;
879 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
880 if (q
->sec
== p
->sec
)
882 q
->pc_count
+= p
->pc_count
;
883 q
->count
+= p
->count
;
890 *pp
= edir
->dyn_relocs
;
893 edir
->dyn_relocs
= eind
->dyn_relocs
;
894 eind
->dyn_relocs
= NULL
;
897 if (ind
->root
.type
== bfd_link_hash_indirect
898 && dir
->got
.refcount
<= 0)
900 edir
->tls_type
= eind
->tls_type
;
901 eind
->tls_type
= GOT_UNKNOWN
;
904 if (ELIMINATE_COPY_RELOCS
905 && ind
->root
.type
!= bfd_link_hash_indirect
906 && dir
->dynamic_adjusted
)
908 /* If called to transfer flags for a weakdef during processing
909 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
910 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
911 dir
->ref_dynamic
|= ind
->ref_dynamic
;
912 dir
->ref_regular
|= ind
->ref_regular
;
913 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
914 dir
->needs_plt
|= ind
->needs_plt
;
915 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
918 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
928 /* Return TRUE if the TLS access code sequence support transition
932 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
934 Elf_Internal_Shdr
*symtab_hdr
,
935 struct elf_link_hash_entry
**sym_hashes
,
937 const Elf_Internal_Rela
*rel
,
938 const Elf_Internal_Rela
*relend
)
940 unsigned int val
, type
;
941 unsigned long r_symndx
;
942 struct elf_link_hash_entry
*h
;
945 /* Get the section contents. */
946 if (contents
== NULL
)
948 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
949 contents
= elf_section_data (sec
)->this_hdr
.contents
;
952 /* FIXME: How to better handle error condition? */
953 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
956 /* Cache the section contents for elf_link_input_bfd. */
957 elf_section_data (sec
)->this_hdr
.contents
= contents
;
961 offset
= rel
->r_offset
;
966 if (offset
< 2 || (rel
+ 1) >= relend
)
969 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
970 if (r_type
== R_386_TLS_GD
)
972 /* Check transition from GD access model. Only
973 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
974 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
975 can transit to different access model. */
976 if ((offset
+ 10) > sec
->size
||
977 (type
!= 0x8d && type
!= 0x04))
980 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
983 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
987 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
990 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
995 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
996 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
999 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1005 /* Check transition from LD access model. Only
1006 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1007 can transit to different access model. */
1008 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1011 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1012 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1016 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1019 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1020 if (r_symndx
< symtab_hdr
->sh_info
)
1023 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1024 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1025 may be versioned. */
1027 && h
->root
.root
.string
!= NULL
1028 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1029 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1030 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1034 /* Check transition from IE access model:
1035 movl foo@indntpoff(%rip), %eax
1036 movl foo@indntpoff(%rip), %reg
1037 addl foo@indntpoff(%rip), %reg
1040 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1043 /* Check "movl foo@tpoff(%rip), %eax" first. */
1044 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1051 /* Check movl|addl foo@tpoff(%rip), %reg. */
1052 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1053 return ((type
== 0x8b || type
== 0x03)
1054 && (val
& 0xc7) == 0x05);
1056 case R_386_TLS_GOTIE
:
1057 case R_386_TLS_IE_32
:
1058 /* Check transition from {IE_32,GOTIE} access model:
1059 subl foo@{tpoff,gontoff}(%reg1), %reg2
1060 movl foo@{tpoff,gontoff}(%reg1), %reg2
1061 addl foo@{tpoff,gontoff}(%reg1), %reg2
1064 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1067 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1068 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1071 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1072 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1074 case R_386_TLS_GOTDESC
:
1075 /* Check transition from GDesc access model:
1076 leal x@tlsdesc(%ebx), %eax
1078 Make sure it's a leal adding ebx to a 32-bit offset
1079 into any register, although it's probably almost always
1082 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1085 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1088 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1089 return (val
& 0xc7) == 0x83;
1091 case R_386_TLS_DESC_CALL
:
1092 /* Check transition from GDesc access model:
1093 call *x@tlsdesc(%rax)
1095 if (offset
+ 2 <= sec
->size
)
1097 /* Make sure that it's a call *x@tlsdesc(%rax). */
1098 static i386_opcode16 call
= { { 0xff, 0x10 } };
1099 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
1109 /* Return TRUE if the TLS access transition is OK or no transition
1110 will be performed. Update R_TYPE if there is a transition. */
1113 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1114 asection
*sec
, bfd_byte
*contents
,
1115 Elf_Internal_Shdr
*symtab_hdr
,
1116 struct elf_link_hash_entry
**sym_hashes
,
1117 unsigned int *r_type
, int tls_type
,
1118 const Elf_Internal_Rela
*rel
,
1119 const Elf_Internal_Rela
*relend
,
1120 struct elf_link_hash_entry
*h
)
1122 unsigned int from_type
= *r_type
;
1123 unsigned int to_type
= from_type
;
1124 bfd_boolean check
= TRUE
;
1129 case R_386_TLS_GOTDESC
:
1130 case R_386_TLS_DESC_CALL
:
1131 case R_386_TLS_IE_32
:
1133 case R_386_TLS_GOTIE
:
1137 to_type
= R_386_TLS_LE_32
;
1138 else if (from_type
!= R_386_TLS_IE
1139 && from_type
!= R_386_TLS_GOTIE
)
1140 to_type
= R_386_TLS_IE_32
;
1143 /* When we are called from elf_i386_relocate_section, CONTENTS
1144 isn't NULL and there may be additional transitions based on
1146 if (contents
!= NULL
)
1148 unsigned int new_to_type
= to_type
;
1153 && (tls_type
& GOT_TLS_IE
))
1154 new_to_type
= R_386_TLS_LE_32
;
1156 if (to_type
== R_386_TLS_GD
1157 || to_type
== R_386_TLS_GOTDESC
1158 || to_type
== R_386_TLS_DESC_CALL
)
1160 if (tls_type
== GOT_TLS_IE_POS
)
1161 new_to_type
= R_386_TLS_GOTIE
;
1162 else if (tls_type
& GOT_TLS_IE
)
1163 new_to_type
= R_386_TLS_IE_32
;
1166 /* We checked the transition before when we were called from
1167 elf_i386_check_relocs. We only want to check the new
1168 transition which hasn't been checked before. */
1169 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1170 to_type
= new_to_type
;
1177 to_type
= R_386_TLS_LE_32
;
1184 /* Return TRUE if there is no transition. */
1185 if (from_type
== to_type
)
1188 /* Check if the transition can be performed. */
1190 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1191 symtab_hdr
, sym_hashes
,
1192 from_type
, rel
, relend
))
1194 reloc_howto_type
*from
, *to
;
1196 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1197 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1199 (*_bfd_error_handler
)
1200 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1201 "in section `%A' failed"),
1202 abfd
, sec
, from
->name
, to
->name
,
1203 h
? h
->root
.root
.string
: "a local symbol",
1204 (unsigned long) rel
->r_offset
);
1205 bfd_set_error (bfd_error_bad_value
);
1213 /* Look through the relocs for a section during the first phase, and
1214 calculate needed space in the global offset table, procedure linkage
1215 table, and dynamic reloc sections. */
1218 elf_i386_check_relocs (bfd
*abfd
,
1219 struct bfd_link_info
*info
,
1221 const Elf_Internal_Rela
*relocs
)
1223 struct elf_i386_link_hash_table
*htab
;
1224 Elf_Internal_Shdr
*symtab_hdr
;
1225 struct elf_link_hash_entry
**sym_hashes
;
1226 const Elf_Internal_Rela
*rel
;
1227 const Elf_Internal_Rela
*rel_end
;
1230 if (info
->relocatable
)
1233 BFD_ASSERT (is_i386_elf (abfd
));
1235 htab
= elf_i386_hash_table (info
);
1236 symtab_hdr
= &elf_symtab_hdr (abfd
);
1237 sym_hashes
= elf_sym_hashes (abfd
);
1241 rel_end
= relocs
+ sec
->reloc_count
;
1242 for (rel
= relocs
; rel
< rel_end
; rel
++)
1244 unsigned int r_type
;
1245 unsigned long r_symndx
;
1246 struct elf_link_hash_entry
*h
;
1248 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1249 r_type
= ELF32_R_TYPE (rel
->r_info
);
1251 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1253 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1259 if (r_symndx
< symtab_hdr
->sh_info
)
1263 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1264 while (h
->root
.type
== bfd_link_hash_indirect
1265 || h
->root
.type
== bfd_link_hash_warning
)
1266 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1268 /* Create the ifunc sections for static executables. If we
1269 never see an indirect function symbol nor we are building
1270 a static executable, those sections will be empty and
1271 won't appear in output. */
1282 if (!info
->shared
&& htab
->iplt
== NULL
)
1284 if (!_bfd_elf_create_static_ifunc_sections (abfd
,
1288 htab
->iplt
= bfd_get_section_by_name (abfd
, ".iplt");
1289 htab
->irelplt
= bfd_get_section_by_name (abfd
,
1291 htab
->igotplt
= bfd_get_section_by_name (abfd
,
1301 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1302 it here if it is defined in a non-shared object. */
1303 if (h
->type
== STT_GNU_IFUNC
1306 /* It is referenced by a non-shared object. */
1309 /* STT_GNU_IFUNC symbol must go through PLT. */
1310 h
->plt
.refcount
+= 1;
1312 /* STT_GNU_IFUNC needs dynamic sections. */
1313 if (htab
->elf
.dynobj
== NULL
)
1314 htab
->elf
.dynobj
= abfd
;
1319 (*_bfd_error_handler
)
1320 (_("%B: relocation %s against STT_GNU_IFUNC "
1321 "symbol `%s' isn't handled by %s"), abfd
,
1322 elf_howto_table
[r_type
].name
,
1323 h
->root
.root
.string
, __FUNCTION__
);
1324 bfd_set_error (bfd_error_bad_value
);
1330 if (r_type
!= R_386_PC32
)
1331 h
->pointer_equality_needed
= 1;
1339 h
->got
.refcount
+= 1;
1340 if (htab
->sgot
== NULL
1341 && !elf_i386_create_got_section (htab
->elf
.dynobj
,
1351 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1352 symtab_hdr
, sym_hashes
,
1353 &r_type
, GOT_UNKNOWN
,
1360 htab
->tls_ldm_got
.refcount
+= 1;
1364 /* This symbol requires a procedure linkage table entry. We
1365 actually build the entry in adjust_dynamic_symbol,
1366 because this might be a case of linking PIC code which is
1367 never referenced by a dynamic object, in which case we
1368 don't need to generate a procedure linkage table entry
1371 /* If this is a local symbol, we resolve it directly without
1372 creating a procedure linkage table entry. */
1377 h
->plt
.refcount
+= 1;
1380 case R_386_TLS_IE_32
:
1382 case R_386_TLS_GOTIE
:
1384 info
->flags
|= DF_STATIC_TLS
;
1389 case R_386_TLS_GOTDESC
:
1390 case R_386_TLS_DESC_CALL
:
1391 /* This symbol requires a global offset table entry. */
1393 int tls_type
, old_tls_type
;
1398 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1399 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1400 case R_386_TLS_GOTDESC
:
1401 case R_386_TLS_DESC_CALL
:
1402 tls_type
= GOT_TLS_GDESC
; break;
1403 case R_386_TLS_IE_32
:
1404 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1405 tls_type
= GOT_TLS_IE_NEG
;
1407 /* If this is a GD->IE transition, we may use either of
1408 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1409 tls_type
= GOT_TLS_IE
;
1412 case R_386_TLS_GOTIE
:
1413 tls_type
= GOT_TLS_IE_POS
; break;
1418 h
->got
.refcount
+= 1;
1419 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1423 bfd_signed_vma
*local_got_refcounts
;
1425 /* This is a global offset table entry for a local symbol. */
1426 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1427 if (local_got_refcounts
== NULL
)
1431 size
= symtab_hdr
->sh_info
;
1432 size
*= (sizeof (bfd_signed_vma
)
1433 + sizeof (bfd_vma
) + sizeof(char));
1434 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1435 if (local_got_refcounts
== NULL
)
1437 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1438 elf_i386_local_tlsdesc_gotent (abfd
)
1439 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1440 elf_i386_local_got_tls_type (abfd
)
1441 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1443 local_got_refcounts
[r_symndx
] += 1;
1444 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1447 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1448 tls_type
|= old_tls_type
;
1449 /* If a TLS symbol is accessed using IE at least once,
1450 there is no point to use dynamic model for it. */
1451 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1452 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1453 || (tls_type
& GOT_TLS_IE
) == 0))
1455 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1456 tls_type
= old_tls_type
;
1457 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1458 && GOT_TLS_GD_ANY_P (tls_type
))
1459 tls_type
|= old_tls_type
;
1462 (*_bfd_error_handler
)
1463 (_("%B: `%s' accessed both as normal and "
1464 "thread local symbol"),
1466 h
? h
->root
.root
.string
: "<local>");
1471 if (old_tls_type
!= tls_type
)
1474 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1476 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1484 if (htab
->sgot
== NULL
)
1486 if (htab
->elf
.dynobj
== NULL
)
1487 htab
->elf
.dynobj
= abfd
;
1488 if (!elf_i386_create_got_section (htab
->elf
.dynobj
, info
))
1491 if (r_type
!= R_386_TLS_IE
)
1495 case R_386_TLS_LE_32
:
1499 info
->flags
|= DF_STATIC_TLS
;
1504 if (h
!= NULL
&& !info
->shared
)
1506 /* If this reloc is in a read-only section, we might
1507 need a copy reloc. We can't check reliably at this
1508 stage whether the section is read-only, as input
1509 sections have not yet been mapped to output sections.
1510 Tentatively set the flag for now, and correct in
1511 adjust_dynamic_symbol. */
1514 /* We may need a .plt entry if the function this reloc
1515 refers to is in a shared lib. */
1516 h
->plt
.refcount
+= 1;
1517 if (r_type
!= R_386_PC32
)
1518 h
->pointer_equality_needed
= 1;
1521 /* If we are creating a shared library, and this is a reloc
1522 against a global symbol, or a non PC relative reloc
1523 against a local symbol, then we need to copy the reloc
1524 into the shared library. However, if we are linking with
1525 -Bsymbolic, we do not need to copy a reloc against a
1526 global symbol which is defined in an object we are
1527 including in the link (i.e., DEF_REGULAR is set). At
1528 this point we have not seen all the input files, so it is
1529 possible that DEF_REGULAR is not set now but will be set
1530 later (it is never cleared). In case of a weak definition,
1531 DEF_REGULAR may be cleared later by a strong definition in
1532 a shared library. We account for that possibility below by
1533 storing information in the relocs_copied field of the hash
1534 table entry. A similar situation occurs when creating
1535 shared libraries and symbol visibility changes render the
1538 If on the other hand, we are creating an executable, we
1539 may need to keep relocations for symbols satisfied by a
1540 dynamic library if we manage to avoid copy relocs for the
1543 && (sec
->flags
& SEC_ALLOC
) != 0
1544 && (r_type
!= R_386_PC32
1546 && (! SYMBOLIC_BIND (info
, h
)
1547 || h
->root
.type
== bfd_link_hash_defweak
1548 || !h
->def_regular
))))
1549 || (ELIMINATE_COPY_RELOCS
1551 && (sec
->flags
& SEC_ALLOC
) != 0
1553 && (h
->root
.type
== bfd_link_hash_defweak
1554 || !h
->def_regular
)))
1556 struct elf_i386_dyn_relocs
*p
;
1557 struct elf_i386_dyn_relocs
**head
;
1559 /* We must copy these reloc types into the output file.
1560 Create a reloc section in dynobj and make room for
1564 if (htab
->elf
.dynobj
== NULL
)
1565 htab
->elf
.dynobj
= abfd
;
1567 sreloc
= _bfd_elf_make_dynamic_reloc_section
1568 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1574 /* If this is a global symbol, we count the number of
1575 relocations we need for this symbol. */
1578 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1583 /* Track dynamic relocs needed for local syms too.
1584 We really need local syms available to do this
1588 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1593 vpp
= &elf_section_data (s
)->local_dynrel
;
1594 head
= (struct elf_i386_dyn_relocs
**)vpp
;
1598 if (p
== NULL
|| p
->sec
!= sec
)
1600 bfd_size_type amt
= sizeof *p
;
1601 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1612 if (r_type
== R_386_PC32
)
1617 /* This relocation describes the C++ object vtable hierarchy.
1618 Reconstruct it for later use during GC. */
1619 case R_386_GNU_VTINHERIT
:
1620 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1624 /* This relocation describes which C++ vtable entries are actually
1625 used. Record for later use during GC. */
1626 case R_386_GNU_VTENTRY
:
1627 BFD_ASSERT (h
!= NULL
);
1629 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1641 /* Return the section that should be marked against GC for a given
1645 elf_i386_gc_mark_hook (asection
*sec
,
1646 struct bfd_link_info
*info
,
1647 Elf_Internal_Rela
*rel
,
1648 struct elf_link_hash_entry
*h
,
1649 Elf_Internal_Sym
*sym
)
1652 switch (ELF32_R_TYPE (rel
->r_info
))
1654 case R_386_GNU_VTINHERIT
:
1655 case R_386_GNU_VTENTRY
:
1659 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1662 /* Update the got entry reference counts for the section being removed. */
1665 elf_i386_gc_sweep_hook (bfd
*abfd
,
1666 struct bfd_link_info
*info
,
1668 const Elf_Internal_Rela
*relocs
)
1670 Elf_Internal_Shdr
*symtab_hdr
;
1671 struct elf_link_hash_entry
**sym_hashes
;
1672 bfd_signed_vma
*local_got_refcounts
;
1673 const Elf_Internal_Rela
*rel
, *relend
;
1675 if (info
->relocatable
)
1678 elf_section_data (sec
)->local_dynrel
= NULL
;
1680 symtab_hdr
= &elf_symtab_hdr (abfd
);
1681 sym_hashes
= elf_sym_hashes (abfd
);
1682 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1684 relend
= relocs
+ sec
->reloc_count
;
1685 for (rel
= relocs
; rel
< relend
; rel
++)
1687 unsigned long r_symndx
;
1688 unsigned int r_type
;
1689 struct elf_link_hash_entry
*h
= NULL
;
1691 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1692 if (r_symndx
>= symtab_hdr
->sh_info
)
1694 struct elf_i386_link_hash_entry
*eh
;
1695 struct elf_i386_dyn_relocs
**pp
;
1696 struct elf_i386_dyn_relocs
*p
;
1698 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1699 while (h
->root
.type
== bfd_link_hash_indirect
1700 || h
->root
.type
== bfd_link_hash_warning
)
1701 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1702 eh
= (struct elf_i386_link_hash_entry
*) h
;
1704 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1707 /* Everything must go for SEC. */
1713 r_type
= ELF32_R_TYPE (rel
->r_info
);
1714 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1715 symtab_hdr
, sym_hashes
,
1716 &r_type
, GOT_UNKNOWN
,
1723 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1724 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1728 case R_386_TLS_GOTDESC
:
1729 case R_386_TLS_DESC_CALL
:
1730 case R_386_TLS_IE_32
:
1732 case R_386_TLS_GOTIE
:
1736 if (h
->got
.refcount
> 0)
1737 h
->got
.refcount
-= 1;
1739 else if (local_got_refcounts
!= NULL
)
1741 if (local_got_refcounts
[r_symndx
] > 0)
1742 local_got_refcounts
[r_symndx
] -= 1;
1755 if (h
->plt
.refcount
> 0)
1756 h
->plt
.refcount
-= 1;
1768 /* Adjust a symbol defined by a dynamic object and referenced by a
1769 regular object. The current definition is in some section of the
1770 dynamic object, but we're not including those sections. We have to
1771 change the definition to something the rest of the link can
1775 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1776 struct elf_link_hash_entry
*h
)
1778 struct elf_i386_link_hash_table
*htab
;
1781 /* STT_GNU_IFUNC symbol must go through PLT. */
1782 if (h
->type
== STT_GNU_IFUNC
)
1784 if (h
->plt
.refcount
<= 0)
1786 h
->plt
.offset
= (bfd_vma
) -1;
1792 /* If this is a function, put it in the procedure linkage table. We
1793 will fill in the contents of the procedure linkage table later,
1794 when we know the address of the .got section. */
1795 if (h
->type
== STT_FUNC
1798 if (h
->plt
.refcount
<= 0
1799 || SYMBOL_CALLS_LOCAL (info
, h
)
1800 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1801 && h
->root
.type
== bfd_link_hash_undefweak
))
1803 /* This case can occur if we saw a PLT32 reloc in an input
1804 file, but the symbol was never referred to by a dynamic
1805 object, or if all references were garbage collected. In
1806 such a case, we don't actually need to build a procedure
1807 linkage table, and we can just do a PC32 reloc instead. */
1808 h
->plt
.offset
= (bfd_vma
) -1;
1815 /* It's possible that we incorrectly decided a .plt reloc was
1816 needed for an R_386_PC32 reloc to a non-function sym in
1817 check_relocs. We can't decide accurately between function and
1818 non-function syms in check-relocs; Objects loaded later in
1819 the link may change h->type. So fix it now. */
1820 h
->plt
.offset
= (bfd_vma
) -1;
1822 /* If this is a weak symbol, and there is a real definition, the
1823 processor independent code will have arranged for us to see the
1824 real definition first, and we can just use the same value. */
1825 if (h
->u
.weakdef
!= NULL
)
1827 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1828 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1829 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1830 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1831 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1832 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1836 /* This is a reference to a symbol defined by a dynamic object which
1837 is not a function. */
1839 /* If we are creating a shared library, we must presume that the
1840 only references to the symbol are via the global offset table.
1841 For such cases we need not do anything here; the relocations will
1842 be handled correctly by relocate_section. */
1846 /* If there are no references to this symbol that do not use the
1847 GOT, we don't need to generate a copy reloc. */
1848 if (!h
->non_got_ref
)
1851 /* If -z nocopyreloc was given, we won't generate them either. */
1852 if (info
->nocopyreloc
)
1858 htab
= elf_i386_hash_table (info
);
1860 /* If there aren't any dynamic relocs in read-only sections, then
1861 we can keep the dynamic relocs and avoid the copy reloc. This
1862 doesn't work on VxWorks, where we can not have dynamic relocations
1863 (other than copy and jump slot relocations) in an executable. */
1864 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1866 struct elf_i386_link_hash_entry
* eh
;
1867 struct elf_i386_dyn_relocs
*p
;
1869 eh
= (struct elf_i386_link_hash_entry
*) h
;
1870 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1872 s
= p
->sec
->output_section
;
1873 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1886 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1887 h
->root
.root
.string
);
1891 /* We must allocate the symbol in our .dynbss section, which will
1892 become part of the .bss section of the executable. There will be
1893 an entry for this symbol in the .dynsym section. The dynamic
1894 object will contain position independent code, so all references
1895 from the dynamic object to this symbol will go through the global
1896 offset table. The dynamic linker will use the .dynsym entry to
1897 determine the address it must put in the global offset table, so
1898 both the dynamic object and the regular object will refer to the
1899 same memory location for the variable. */
1901 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1902 copy the initial value out of the dynamic object and into the
1903 runtime process image. */
1904 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1906 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1912 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1915 /* Allocate space in .plt, .got and associated reloc sections for
1919 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1921 struct bfd_link_info
*info
;
1922 struct elf_i386_link_hash_table
*htab
;
1923 struct elf_i386_link_hash_entry
*eh
;
1924 struct elf_i386_dyn_relocs
*p
;
1926 if (h
->root
.type
== bfd_link_hash_indirect
)
1929 if (h
->root
.type
== bfd_link_hash_warning
)
1930 /* When warning symbols are created, they **replace** the "real"
1931 entry in the hash table, thus we never get to see the real
1932 symbol in a hash traversal. So look at it now. */
1933 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1934 eh
= (struct elf_i386_link_hash_entry
*) h
;
1936 info
= (struct bfd_link_info
*) inf
;
1937 htab
= elf_i386_hash_table (info
);
1939 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1940 here if it is defined and referenced in a non-shared object. */
1941 if (h
->type
== STT_GNU_IFUNC
1944 asection
*plt
, *gotplt
, *relplt
;
1946 /* Return and discard space for dynamic relocations against it if
1947 it is never referenced in a non-shared object. */
1948 if (!h
->ref_regular
)
1950 if (h
->plt
.refcount
> 0
1951 || h
->got
.refcount
> 0)
1953 h
->got
.offset
= (bfd_vma
) -1;
1954 eh
->dyn_relocs
= NULL
;
1958 if (h
->plt
.refcount
<= 0)
1961 /* When building a static executable, use .iplt, .igot.plt and
1962 .rel.iplt sections for STT_GNU_IFUNC symbols. */
1963 if (htab
->splt
!= 0)
1966 gotplt
= htab
->sgotplt
;
1967 relplt
= htab
->srelplt
;
1969 /* If this is the first .plt entry, make room for the special
1972 plt
->size
+= PLT_ENTRY_SIZE
;
1977 gotplt
= htab
->igotplt
;
1978 relplt
= htab
->irelplt
;
1981 /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need
1982 the original value for R_386_IRELATIVE. */
1983 h
->plt
.offset
= plt
->size
;
1985 /* Make room for this entry in the .plt/.iplt section. */
1986 plt
->size
+= PLT_ENTRY_SIZE
;
1988 /* We also need to make an entry in the .got.plt/.got.iplt
1989 section, which will be placed in the .got section by the
1993 /* We also need to make an entry in the .rela.plt/.rela.iplt
1995 relplt
->size
+= sizeof (Elf32_External_Rel
);
1996 relplt
->reloc_count
++;
1998 /* No need for dynamic relocation for local STT_GNU_IFUNC symbol.
1999 Discard space for relocations against it. */
2000 if (h
->dynindx
== -1 || h
->forced_local
)
2001 eh
->dyn_relocs
= NULL
;
2003 /* STT_GNU_IFUNC symbol uses .got.plt, not .got. But for
2004 shared library, we must go through GOT and we can't
2005 use R_386_IRELATIVE unless it is forced local. */
2006 if (info
->executable
2010 if (h
->pointer_equality_needed
2011 && htab
->sgot
!= NULL
)
2013 /* We can't use .got.plt, which contains the real
2014 function addres, since we need pointer equality.
2015 We will load the GOT entry with the PLT entry
2016 in elf_i386_finish_dynamic_symbol and don't
2017 need GOT relocation. */
2018 h
->got
.offset
= htab
->sgot
->size
;
2019 htab
->sgot
->size
+= 4;
2020 eh
->tlsdesc_got
= (bfd_vma
) -1;
2024 h
->got
.refcount
= 0;
2027 else if (htab
->elf
.dynamic_sections_created
2028 && h
->plt
.refcount
> 0)
2030 /* Make sure this symbol is output as a dynamic symbol.
2031 Undefined weak syms won't yet be marked as dynamic. */
2032 if (h
->dynindx
== -1
2033 && !h
->forced_local
)
2035 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2040 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2042 asection
*s
= htab
->splt
;
2044 /* If this is the first .plt entry, make room for the special
2047 s
->size
+= PLT_ENTRY_SIZE
;
2049 h
->plt
.offset
= s
->size
;
2051 /* If this symbol is not defined in a regular file, and we are
2052 not generating a shared library, then set the symbol to this
2053 location in the .plt. This is required to make function
2054 pointers compare as equal between the normal executable and
2055 the shared library. */
2059 h
->root
.u
.def
.section
= s
;
2060 h
->root
.u
.def
.value
= h
->plt
.offset
;
2063 /* Make room for this entry. */
2064 s
->size
+= PLT_ENTRY_SIZE
;
2066 /* We also need to make an entry in the .got.plt section, which
2067 will be placed in the .got section by the linker script. */
2068 htab
->sgotplt
->size
+= 4;
2070 /* We also need to make an entry in the .rel.plt section. */
2071 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2072 htab
->next_tls_desc_index
++;
2074 if (htab
->is_vxworks
&& !info
->shared
)
2076 /* VxWorks has a second set of relocations for each PLT entry
2077 in executables. They go in a separate relocation section,
2078 which is processed by the kernel loader. */
2080 /* There are two relocations for the initial PLT entry: an
2081 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2082 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2084 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
2085 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2087 /* There are two extra relocations for each subsequent PLT entry:
2088 an R_386_32 relocation for the GOT entry, and an R_386_32
2089 relocation for the PLT entry. */
2091 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2096 h
->plt
.offset
= (bfd_vma
) -1;
2102 h
->plt
.offset
= (bfd_vma
) -1;
2106 eh
->tlsdesc_got
= (bfd_vma
) -1;
2108 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2109 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2110 if (h
->got
.refcount
> 0
2113 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2114 h
->got
.offset
= (bfd_vma
) -1;
2115 else if (h
->got
.refcount
> 0)
2119 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2121 /* Make sure this symbol is output as a dynamic symbol.
2122 Undefined weak syms won't yet be marked as dynamic. */
2123 if (h
->dynindx
== -1
2124 && !h
->forced_local
)
2126 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2131 if (GOT_TLS_GDESC_P (tls_type
))
2133 eh
->tlsdesc_got
= htab
->sgotplt
->size
2134 - elf_i386_compute_jump_table_size (htab
);
2135 htab
->sgotplt
->size
+= 8;
2136 h
->got
.offset
= (bfd_vma
) -2;
2138 if (! GOT_TLS_GDESC_P (tls_type
)
2139 || GOT_TLS_GD_P (tls_type
))
2141 h
->got
.offset
= s
->size
;
2143 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2144 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2147 dyn
= htab
->elf
.dynamic_sections_created
;
2148 /* R_386_TLS_IE_32 needs one dynamic relocation,
2149 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2150 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2151 need two), R_386_TLS_GD needs one if local symbol and two if
2153 if (tls_type
== GOT_TLS_IE_BOTH
)
2154 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2155 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2156 || (tls_type
& GOT_TLS_IE
))
2157 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2158 else if (GOT_TLS_GD_P (tls_type
))
2159 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2160 else if (! GOT_TLS_GDESC_P (tls_type
)
2161 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2162 || h
->root
.type
!= bfd_link_hash_undefweak
)
2164 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2165 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2166 if (GOT_TLS_GDESC_P (tls_type
))
2167 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2170 h
->got
.offset
= (bfd_vma
) -1;
2173 if (eh
->dyn_relocs
== NULL
)
2176 /* In the shared -Bsymbolic case, discard space allocated for
2177 dynamic pc-relative relocs against symbols which turn out to be
2178 defined in regular objects. For the normal shared case, discard
2179 space for pc-relative relocs that have become local due to symbol
2180 visibility changes. */
2184 /* The only reloc that uses pc_count is R_386_PC32, which will
2185 appear on a call or on something like ".long foo - .". We
2186 want calls to protected symbols to resolve directly to the
2187 function rather than going via the plt. If people want
2188 function pointer comparisons to work as expected then they
2189 should avoid writing assembly like ".long foo - .". */
2190 if (SYMBOL_CALLS_LOCAL (info
, h
))
2192 struct elf_i386_dyn_relocs
**pp
;
2194 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2196 p
->count
-= p
->pc_count
;
2205 if (htab
->is_vxworks
)
2207 struct elf_i386_dyn_relocs
**pp
;
2208 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2210 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2217 /* Also discard relocs on undefined weak syms with non-default
2219 if (eh
->dyn_relocs
!= NULL
2220 && h
->root
.type
== bfd_link_hash_undefweak
)
2222 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2223 eh
->dyn_relocs
= NULL
;
2225 /* Make sure undefined weak symbols are output as a dynamic
2227 else if (h
->dynindx
== -1
2228 && !h
->forced_local
)
2230 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2235 else if (ELIMINATE_COPY_RELOCS
)
2237 /* For the non-shared case, discard space for relocs against
2238 symbols which turn out to need copy relocs or are not
2244 || (htab
->elf
.dynamic_sections_created
2245 && (h
->root
.type
== bfd_link_hash_undefweak
2246 || h
->root
.type
== bfd_link_hash_undefined
))))
2248 /* Make sure this symbol is output as a dynamic symbol.
2249 Undefined weak syms won't yet be marked as dynamic. */
2250 if (h
->dynindx
== -1
2251 && !h
->forced_local
)
2253 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2257 /* If that succeeded, we know we'll be keeping all the
2259 if (h
->dynindx
!= -1)
2263 eh
->dyn_relocs
= NULL
;
2268 /* Finally, allocate space. */
2269 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2273 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2275 BFD_ASSERT (sreloc
!= NULL
);
2276 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2282 /* Find any dynamic relocs that apply to read-only sections. */
2285 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2287 struct elf_i386_link_hash_entry
*eh
;
2288 struct elf_i386_dyn_relocs
*p
;
2290 if (h
->root
.type
== bfd_link_hash_warning
)
2291 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2293 eh
= (struct elf_i386_link_hash_entry
*) h
;
2294 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2296 asection
*s
= p
->sec
->output_section
;
2298 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2300 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2302 info
->flags
|= DF_TEXTREL
;
2304 /* Not an error, just cut short the traversal. */
2311 /* Set the sizes of the dynamic sections. */
2314 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2315 struct bfd_link_info
*info
)
2317 struct elf_i386_link_hash_table
*htab
;
2323 htab
= elf_i386_hash_table (info
);
2324 dynobj
= htab
->elf
.dynobj
;
2328 if (htab
->elf
.dynamic_sections_created
)
2330 /* Set the contents of the .interp section to the interpreter. */
2331 if (info
->executable
)
2333 s
= bfd_get_section_by_name (dynobj
, ".interp");
2336 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2337 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2341 /* Set up .got offsets for local syms, and space for local dynamic
2343 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2345 bfd_signed_vma
*local_got
;
2346 bfd_signed_vma
*end_local_got
;
2347 char *local_tls_type
;
2348 bfd_vma
*local_tlsdesc_gotent
;
2349 bfd_size_type locsymcount
;
2350 Elf_Internal_Shdr
*symtab_hdr
;
2353 if (! is_i386_elf (ibfd
))
2356 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2358 struct elf_i386_dyn_relocs
*p
;
2360 for (p
= ((struct elf_i386_dyn_relocs
*)
2361 elf_section_data (s
)->local_dynrel
);
2365 if (!bfd_is_abs_section (p
->sec
)
2366 && bfd_is_abs_section (p
->sec
->output_section
))
2368 /* Input section has been discarded, either because
2369 it is a copy of a linkonce section or due to
2370 linker script /DISCARD/, so we'll be discarding
2373 else if (htab
->is_vxworks
2374 && strcmp (p
->sec
->output_section
->name
,
2377 /* Relocations in vxworks .tls_vars sections are
2378 handled specially by the loader. */
2380 else if (p
->count
!= 0)
2382 srel
= elf_section_data (p
->sec
)->sreloc
;
2383 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2384 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2385 info
->flags
|= DF_TEXTREL
;
2390 local_got
= elf_local_got_refcounts (ibfd
);
2394 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2395 locsymcount
= symtab_hdr
->sh_info
;
2396 end_local_got
= local_got
+ locsymcount
;
2397 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2398 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2400 srel
= htab
->srelgot
;
2401 for (; local_got
< end_local_got
;
2402 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2404 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2407 if (GOT_TLS_GDESC_P (*local_tls_type
))
2409 *local_tlsdesc_gotent
= htab
->sgotplt
->size
2410 - elf_i386_compute_jump_table_size (htab
);
2411 htab
->sgotplt
->size
+= 8;
2412 *local_got
= (bfd_vma
) -2;
2414 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2415 || GOT_TLS_GD_P (*local_tls_type
))
2417 *local_got
= s
->size
;
2419 if (GOT_TLS_GD_P (*local_tls_type
)
2420 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2424 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2425 || (*local_tls_type
& GOT_TLS_IE
))
2427 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2428 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2429 else if (GOT_TLS_GD_P (*local_tls_type
)
2430 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2431 srel
->size
+= sizeof (Elf32_External_Rel
);
2432 if (GOT_TLS_GDESC_P (*local_tls_type
))
2433 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2437 *local_got
= (bfd_vma
) -1;
2441 if (htab
->tls_ldm_got
.refcount
> 0)
2443 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2445 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2446 htab
->sgot
->size
+= 8;
2447 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2450 htab
->tls_ldm_got
.offset
= -1;
2452 /* Allocate global sym .plt and .got entries, and space for global
2453 sym dynamic relocs. */
2454 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2456 /* For every jump slot reserved in the sgotplt, reloc_count is
2457 incremented. However, when we reserve space for TLS descriptors,
2458 it's not incremented, so in order to compute the space reserved
2459 for them, it suffices to multiply the reloc count by the jump
2462 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2464 /* We now have determined the sizes of the various dynamic sections.
2465 Allocate memory for them. */
2467 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2469 bfd_boolean strip_section
= TRUE
;
2471 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2476 || s
== htab
->sgotplt
2478 || s
== htab
->igotplt
2479 || s
== htab
->sdynbss
)
2481 /* Strip this section if we don't need it; see the
2483 /* We'd like to strip these sections if they aren't needed, but if
2484 we've exported dynamic symbols from them we must leave them.
2485 It's too late to tell BFD to get rid of the symbols. */
2487 if (htab
->elf
.hplt
!= NULL
)
2488 strip_section
= FALSE
;
2490 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2492 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
2495 /* We use the reloc_count field as a counter if we need
2496 to copy relocs into the output file. */
2501 /* It's not one of our sections, so don't allocate space. */
2507 /* If we don't need this section, strip it from the
2508 output file. This is mostly to handle .rel.bss and
2509 .rel.plt. We must create both sections in
2510 create_dynamic_sections, because they must be created
2511 before the linker maps input sections to output
2512 sections. The linker does that before
2513 adjust_dynamic_symbol is called, and it is that
2514 function which decides whether anything needs to go
2515 into these sections. */
2517 s
->flags
|= SEC_EXCLUDE
;
2521 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2524 /* Allocate memory for the section contents. We use bfd_zalloc
2525 here in case unused entries are not reclaimed before the
2526 section's contents are written out. This should not happen,
2527 but this way if it does, we get a R_386_NONE reloc instead
2529 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2530 if (s
->contents
== NULL
)
2534 if (htab
->elf
.dynamic_sections_created
)
2536 /* Add some entries to the .dynamic section. We fill in the
2537 values later, in elf_i386_finish_dynamic_sections, but we
2538 must add the entries now so that we get the correct size for
2539 the .dynamic section. The DT_DEBUG entry is filled in by the
2540 dynamic linker and used by the debugger. */
2541 #define add_dynamic_entry(TAG, VAL) \
2542 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2544 if (info
->executable
)
2546 if (!add_dynamic_entry (DT_DEBUG
, 0))
2550 if (htab
->splt
->size
!= 0)
2552 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2553 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2554 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2555 || !add_dynamic_entry (DT_JMPREL
, 0))
2561 if (!add_dynamic_entry (DT_REL
, 0)
2562 || !add_dynamic_entry (DT_RELSZ
, 0)
2563 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2566 /* If any dynamic relocs apply to a read-only section,
2567 then we need a DT_TEXTREL entry. */
2568 if ((info
->flags
& DF_TEXTREL
) == 0)
2569 elf_link_hash_traverse (&htab
->elf
,
2570 elf_i386_readonly_dynrelocs
, info
);
2572 if ((info
->flags
& DF_TEXTREL
) != 0)
2574 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2578 if (htab
->is_vxworks
2579 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2582 #undef add_dynamic_entry
2588 elf_i386_always_size_sections (bfd
*output_bfd
,
2589 struct bfd_link_info
*info
)
2591 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2595 struct elf_link_hash_entry
*tlsbase
;
2597 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2598 "_TLS_MODULE_BASE_",
2599 FALSE
, FALSE
, FALSE
);
2601 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2603 struct bfd_link_hash_entry
*bh
= NULL
;
2604 const struct elf_backend_data
*bed
2605 = get_elf_backend_data (output_bfd
);
2607 if (!(_bfd_generic_link_add_one_symbol
2608 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2609 tls_sec
, 0, NULL
, FALSE
,
2610 bed
->collect
, &bh
)))
2613 elf_i386_hash_table (info
)->tls_module_base
= bh
;
2615 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2616 tlsbase
->def_regular
= 1;
2617 tlsbase
->other
= STV_HIDDEN
;
2618 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2625 /* Set the correct type for an x86 ELF section. We do this by the
2626 section name, which is a hack, but ought to work. */
2629 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2630 Elf_Internal_Shdr
*hdr
,
2633 register const char *name
;
2635 name
= bfd_get_section_name (abfd
, sec
);
2637 /* This is an ugly, but unfortunately necessary hack that is
2638 needed when producing EFI binaries on x86. It tells
2639 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2640 containing ELF relocation info. We need this hack in order to
2641 be able to generate ELF binaries that can be translated into
2642 EFI applications (which are essentially COFF objects). Those
2643 files contain a COFF ".reloc" section inside an ELFNN object,
2644 which would normally cause BFD to segfault because it would
2645 attempt to interpret this section as containing relocation
2646 entries for section "oc". With this hack enabled, ".reloc"
2647 will be treated as a normal data section, which will avoid the
2648 segfault. However, you won't be able to create an ELFNN binary
2649 with a section named "oc" that needs relocations, but that's
2650 the kind of ugly side-effects you get when detecting section
2651 types based on their names... In practice, this limitation is
2652 unlikely to bite. */
2653 if (strcmp (name
, ".reloc") == 0)
2654 hdr
->sh_type
= SHT_PROGBITS
;
2659 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2660 executables. Rather than setting it to the beginning of the TLS
2661 section, we have to set it to the end. This function may be called
2662 multiple times, it is idempotent. */
2665 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2667 struct bfd_link_hash_entry
*base
;
2669 if (!info
->executable
)
2672 base
= elf_i386_hash_table (info
)->tls_module_base
;
2677 base
->u
.def
.value
= elf_hash_table (info
)->tls_size
;
2680 /* Return the base VMA address which should be subtracted from real addresses
2681 when resolving @dtpoff relocation.
2682 This is PT_TLS segment p_vaddr. */
2685 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2687 /* If tls_sec is NULL, we should have signalled an error already. */
2688 if (elf_hash_table (info
)->tls_sec
== NULL
)
2690 return elf_hash_table (info
)->tls_sec
->vma
;
2693 /* Return the relocation value for @tpoff relocation
2694 if STT_TLS virtual address is ADDRESS. */
2697 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2699 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2701 /* If tls_sec is NULL, we should have signalled an error already. */
2702 if (htab
->tls_sec
== NULL
)
2704 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2707 /* Relocate an i386 ELF section. */
2710 elf_i386_relocate_section (bfd
*output_bfd
,
2711 struct bfd_link_info
*info
,
2713 asection
*input_section
,
2715 Elf_Internal_Rela
*relocs
,
2716 Elf_Internal_Sym
*local_syms
,
2717 asection
**local_sections
)
2719 struct elf_i386_link_hash_table
*htab
;
2720 Elf_Internal_Shdr
*symtab_hdr
;
2721 struct elf_link_hash_entry
**sym_hashes
;
2722 bfd_vma
*local_got_offsets
;
2723 bfd_vma
*local_tlsdesc_gotents
;
2724 Elf_Internal_Rela
*rel
;
2725 Elf_Internal_Rela
*relend
;
2726 bfd_boolean is_vxworks_tls
;
2728 BFD_ASSERT (is_i386_elf (input_bfd
));
2730 htab
= elf_i386_hash_table (info
);
2731 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2732 sym_hashes
= elf_sym_hashes (input_bfd
);
2733 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2734 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2735 /* We have to handle relocations in vxworks .tls_vars sections
2736 specially, because the dynamic loader is 'weird'. */
2737 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2738 && !strcmp (input_section
->output_section
->name
,
2741 elf_i386_set_tls_module_base (info
);
2744 relend
= relocs
+ input_section
->reloc_count
;
2745 for (; rel
< relend
; rel
++)
2747 unsigned int r_type
;
2748 reloc_howto_type
*howto
;
2749 unsigned long r_symndx
;
2750 struct elf_link_hash_entry
*h
;
2751 Elf_Internal_Sym
*sym
;
2753 bfd_vma off
, offplt
;
2755 bfd_boolean unresolved_reloc
;
2756 bfd_reloc_status_type r
;
2760 r_type
= ELF32_R_TYPE (rel
->r_info
);
2761 if (r_type
== R_386_GNU_VTINHERIT
2762 || r_type
== R_386_GNU_VTENTRY
)
2765 if ((indx
= r_type
) >= R_386_standard
2766 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2767 >= R_386_ext
- R_386_standard
)
2768 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2769 >= R_386_irelative
- R_386_ext
))
2771 (*_bfd_error_handler
)
2772 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2773 input_bfd
, input_section
, r_type
);
2774 bfd_set_error (bfd_error_bad_value
);
2777 howto
= elf_howto_table
+ indx
;
2779 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2783 unresolved_reloc
= FALSE
;
2784 if (r_symndx
< symtab_hdr
->sh_info
)
2786 sym
= local_syms
+ r_symndx
;
2787 sec
= local_sections
[r_symndx
];
2788 relocation
= (sec
->output_section
->vma
2789 + sec
->output_offset
2792 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2793 && ((sec
->flags
& SEC_MERGE
) != 0
2794 || (info
->relocatable
2795 && sec
->output_offset
!= 0)))
2798 bfd_byte
*where
= contents
+ rel
->r_offset
;
2800 switch (howto
->size
)
2803 addend
= bfd_get_8 (input_bfd
, where
);
2804 if (howto
->pc_relative
)
2806 addend
= (addend
^ 0x80) - 0x80;
2811 addend
= bfd_get_16 (input_bfd
, where
);
2812 if (howto
->pc_relative
)
2814 addend
= (addend
^ 0x8000) - 0x8000;
2819 addend
= bfd_get_32 (input_bfd
, where
);
2820 if (howto
->pc_relative
)
2822 addend
= (addend
^ 0x80000000) - 0x80000000;
2830 if (info
->relocatable
)
2831 addend
+= sec
->output_offset
;
2834 asection
*msec
= sec
;
2835 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2837 addend
-= relocation
;
2838 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2841 switch (howto
->size
)
2844 /* FIXME: overflow checks. */
2845 if (howto
->pc_relative
)
2847 bfd_put_8 (input_bfd
, addend
, where
);
2850 if (howto
->pc_relative
)
2852 bfd_put_16 (input_bfd
, addend
, where
);
2855 if (howto
->pc_relative
)
2857 bfd_put_32 (input_bfd
, addend
, where
);
2866 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2867 r_symndx
, symtab_hdr
, sym_hashes
,
2869 unresolved_reloc
, warned
);
2872 if (sec
!= NULL
&& elf_discarded_section (sec
))
2874 /* For relocs against symbols from removed linkonce sections,
2875 or sections discarded by a linker script, we just want the
2876 section contents zeroed. Avoid any special processing. */
2877 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2883 if (info
->relocatable
)
2886 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2887 it here if it is defined in a non-shared object. */
2889 && h
->type
== STT_GNU_IFUNC
2892 asection
*plt
, *gotplt
, *base_got
;
2895 if ((input_section
->flags
& SEC_ALLOC
) == 0
2896 || h
->plt
.offset
== (bfd_vma
) -1)
2899 /* STT_GNU_IFUNC symbol must go through PLT. */
2900 if (htab
->splt
!= NULL
)
2903 gotplt
= htab
->sgotplt
;
2908 gotplt
= htab
->igotplt
;
2911 relocation
= (plt
->output_section
->vma
2912 + plt
->output_offset
+ h
->plt
.offset
);
2917 (*_bfd_error_handler
)
2918 (_("%B: relocation %s against STT_GNU_IFUNC "
2919 "symbol `%s' isn't handled by %s"), input_bfd
,
2920 elf_howto_table
[r_type
].name
,
2921 h
->root
.root
.string
, __FUNCTION__
);
2922 bfd_set_error (bfd_error_bad_value
);
2931 base_got
= htab
->sgot
;
2932 off
= h
->got
.offset
;
2934 if (base_got
== NULL
)
2937 if (off
== (bfd_vma
) -1)
2939 /* We can't use h->got.offset here to save state, or
2940 even just remember the offset, as finish_dynamic_symbol
2941 would use that as offset into .got. */
2943 if (htab
->splt
!= NULL
)
2945 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
2946 off
= (plt_index
+ 3) * 4;
2947 base_got
= htab
->sgotplt
;
2951 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2952 off
= plt_index
* 4;
2953 base_got
= htab
->igotplt
;
2956 if (h
->dynindx
== -1
2960 /* This references the local defitionion. We must
2961 initialize this entry in the global offset table.
2962 Since the offset must always be a multiple of 8,
2963 we use the least significant bit to record
2964 whether we have initialized it already.
2966 When doing a dynamic link, we create a .rela.got
2967 relocation entry to initialize the value. This
2968 is done in the finish_dynamic_symbol routine. */
2973 bfd_put_32 (output_bfd
, relocation
,
2974 base_got
->contents
+ off
);
2981 /* Adjust for static executables. */
2982 if (htab
->splt
== NULL
)
2983 relocation
+= gotplt
->output_offset
;
2987 relocation
= (base_got
->output_section
->vma
2988 + base_got
->output_offset
+ off
2989 - gotplt
->output_section
->vma
2990 - gotplt
->output_offset
);
2991 /* Adjust for static executables. */
2992 if (htab
->splt
== NULL
)
2993 relocation
+= gotplt
->output_offset
;
2999 relocation
-= (gotplt
->output_section
->vma
3000 + gotplt
->output_offset
);
3008 /* Relocation is to the entry for this symbol in the global
3010 if (htab
->sgot
== NULL
)
3017 off
= h
->got
.offset
;
3018 dyn
= htab
->elf
.dynamic_sections_created
;
3019 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3021 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3022 || (ELF_ST_VISIBILITY (h
->other
)
3023 && h
->root
.type
== bfd_link_hash_undefweak
))
3025 /* This is actually a static link, or it is a
3026 -Bsymbolic link and the symbol is defined
3027 locally, or the symbol was forced to be local
3028 because of a version file. We must initialize
3029 this entry in the global offset table. Since the
3030 offset must always be a multiple of 4, we use the
3031 least significant bit to record whether we have
3032 initialized it already.
3034 When doing a dynamic link, we create a .rel.got
3035 relocation entry to initialize the value. This
3036 is done in the finish_dynamic_symbol routine. */
3041 bfd_put_32 (output_bfd
, relocation
,
3042 htab
->sgot
->contents
+ off
);
3047 unresolved_reloc
= FALSE
;
3051 if (local_got_offsets
== NULL
)
3054 off
= local_got_offsets
[r_symndx
];
3056 /* The offset must always be a multiple of 4. We use
3057 the least significant bit to record whether we have
3058 already generated the necessary reloc. */
3063 bfd_put_32 (output_bfd
, relocation
,
3064 htab
->sgot
->contents
+ off
);
3069 Elf_Internal_Rela outrel
;
3076 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3077 + htab
->sgot
->output_offset
3079 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3081 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3082 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3085 local_got_offsets
[r_symndx
] |= 1;
3089 if (off
>= (bfd_vma
) -2)
3092 relocation
= htab
->sgot
->output_section
->vma
3093 + htab
->sgot
->output_offset
+ off
3094 - htab
->sgotplt
->output_section
->vma
3095 - htab
->sgotplt
->output_offset
;
3099 /* Relocation is relative to the start of the global offset
3102 /* Check to make sure it isn't a protected function symbol
3103 for shared library since it may not be local when used
3104 as function address. We also need to make sure that a
3105 symbol is defined locally. */
3106 if (info
->shared
&& h
)
3108 if (!h
->def_regular
)
3112 switch (ELF_ST_VISIBILITY (h
->other
))
3115 v
= _("hidden symbol");
3118 v
= _("internal symbol");
3121 v
= _("protected symbol");
3128 (*_bfd_error_handler
)
3129 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3130 input_bfd
, v
, h
->root
.root
.string
);
3131 bfd_set_error (bfd_error_bad_value
);
3134 else if (!info
->executable
3135 && h
->type
== STT_FUNC
3136 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3138 (*_bfd_error_handler
)
3139 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3140 input_bfd
, h
->root
.root
.string
);
3141 bfd_set_error (bfd_error_bad_value
);
3146 /* Note that sgot is not involved in this
3147 calculation. We always want the start of .got.plt. If we
3148 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3149 permitted by the ABI, we might have to change this
3151 relocation
-= htab
->sgotplt
->output_section
->vma
3152 + htab
->sgotplt
->output_offset
;
3156 /* Use global offset table as symbol value. */
3157 relocation
= htab
->sgotplt
->output_section
->vma
3158 + htab
->sgotplt
->output_offset
;
3159 unresolved_reloc
= FALSE
;
3163 /* Relocation is to the entry for this symbol in the
3164 procedure linkage table. */
3166 /* Resolve a PLT32 reloc against a local symbol directly,
3167 without using the procedure linkage table. */
3171 if (h
->plt
.offset
== (bfd_vma
) -1
3172 || htab
->splt
== NULL
)
3174 /* We didn't make a PLT entry for this symbol. This
3175 happens when statically linking PIC code, or when
3176 using -Bsymbolic. */
3180 relocation
= (htab
->splt
->output_section
->vma
3181 + htab
->splt
->output_offset
3183 unresolved_reloc
= FALSE
;
3188 if ((input_section
->flags
& SEC_ALLOC
) == 0
3194 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3195 || h
->root
.type
!= bfd_link_hash_undefweak
)
3196 && (r_type
!= R_386_PC32
3197 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3198 || (ELIMINATE_COPY_RELOCS
3205 || h
->root
.type
== bfd_link_hash_undefweak
3206 || h
->root
.type
== bfd_link_hash_undefined
)))
3208 Elf_Internal_Rela outrel
;
3210 bfd_boolean skip
, relocate
;
3213 /* When generating a shared object, these relocations
3214 are copied into the output file to be resolved at run
3221 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3223 if (outrel
.r_offset
== (bfd_vma
) -1)
3225 else if (outrel
.r_offset
== (bfd_vma
) -2)
3226 skip
= TRUE
, relocate
= TRUE
;
3227 outrel
.r_offset
+= (input_section
->output_section
->vma
3228 + input_section
->output_offset
);
3231 memset (&outrel
, 0, sizeof outrel
);
3234 && (r_type
== R_386_PC32
3236 || !SYMBOLIC_BIND (info
, h
)
3237 || !h
->def_regular
))
3238 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3241 /* This symbol is local, or marked to become local. */
3243 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3246 sreloc
= elf_section_data (input_section
)->sreloc
;
3248 BFD_ASSERT (sreloc
!= NULL
&& sreloc
->contents
!= NULL
);
3250 loc
= sreloc
->contents
;
3251 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3253 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3255 /* If this reloc is against an external symbol, we do
3256 not want to fiddle with the addend. Otherwise, we
3257 need to include the symbol value so that it becomes
3258 an addend for the dynamic reloc. */
3267 Elf_Internal_Rela outrel
;
3271 outrel
.r_offset
= rel
->r_offset
3272 + input_section
->output_section
->vma
3273 + input_section
->output_offset
;
3274 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3275 sreloc
= elf_section_data (input_section
)->sreloc
;
3278 loc
= sreloc
->contents
;
3279 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3280 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3285 case R_386_TLS_GOTDESC
:
3286 case R_386_TLS_DESC_CALL
:
3287 case R_386_TLS_IE_32
:
3288 case R_386_TLS_GOTIE
:
3289 tls_type
= GOT_UNKNOWN
;
3290 if (h
== NULL
&& local_got_offsets
)
3291 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3293 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3294 if (tls_type
== GOT_TLS_IE
)
3295 tls_type
= GOT_TLS_IE_NEG
;
3297 if (! elf_i386_tls_transition (info
, input_bfd
,
3298 input_section
, contents
,
3299 symtab_hdr
, sym_hashes
,
3300 &r_type
, tls_type
, rel
,
3304 if (r_type
== R_386_TLS_LE_32
)
3306 BFD_ASSERT (! unresolved_reloc
);
3307 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3312 /* GD->LE transition. */
3313 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3316 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3318 movl %gs:0, %eax; subl $foo@tpoff, %eax
3319 (6 byte form of subl). */
3320 memcpy (contents
+ rel
->r_offset
- 3,
3321 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3322 roff
= rel
->r_offset
+ 5;
3326 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3328 movl %gs:0, %eax; subl $foo@tpoff, %eax
3329 (6 byte form of subl). */
3330 memcpy (contents
+ rel
->r_offset
- 2,
3331 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3332 roff
= rel
->r_offset
+ 6;
3334 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3336 /* Skip R_386_PC32/R_386_PLT32. */
3340 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3342 /* GDesc -> LE transition.
3343 It's originally something like:
3344 leal x@tlsdesc(%ebx), %eax
3348 Registers other than %eax may be set up here. */
3353 roff
= rel
->r_offset
;
3354 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3356 /* Now modify the instruction as appropriate. */
3357 /* aoliva FIXME: remove the above and xor the byte
3359 bfd_put_8 (output_bfd
, val
^ 0x86,
3360 contents
+ roff
- 1);
3361 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3365 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3367 /* GDesc -> LE transition.
3375 roff
= rel
->r_offset
;
3376 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3377 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3380 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3384 /* IE->LE transition:
3385 Originally it can be one of:
3393 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3396 /* movl foo, %eax. */
3397 bfd_put_8 (output_bfd
, 0xb8,
3398 contents
+ rel
->r_offset
- 1);
3404 type
= bfd_get_8 (input_bfd
,
3405 contents
+ rel
->r_offset
- 2);
3410 bfd_put_8 (output_bfd
, 0xc7,
3411 contents
+ rel
->r_offset
- 2);
3412 bfd_put_8 (output_bfd
,
3413 0xc0 | ((val
>> 3) & 7),
3414 contents
+ rel
->r_offset
- 1);
3418 bfd_put_8 (output_bfd
, 0x81,
3419 contents
+ rel
->r_offset
- 2);
3420 bfd_put_8 (output_bfd
,
3421 0xc0 | ((val
>> 3) & 7),
3422 contents
+ rel
->r_offset
- 1);
3429 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3430 contents
+ rel
->r_offset
);
3435 unsigned int val
, type
;
3437 /* {IE_32,GOTIE}->LE transition:
3438 Originally it can be one of:
3439 subl foo(%reg1), %reg2
3440 movl foo(%reg1), %reg2
3441 addl foo(%reg1), %reg2
3444 movl $foo, %reg2 (6 byte form)
3445 addl $foo, %reg2. */
3446 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3447 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3451 bfd_put_8 (output_bfd
, 0xc7,
3452 contents
+ rel
->r_offset
- 2);
3453 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3454 contents
+ rel
->r_offset
- 1);
3456 else if (type
== 0x2b)
3459 bfd_put_8 (output_bfd
, 0x81,
3460 contents
+ rel
->r_offset
- 2);
3461 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3462 contents
+ rel
->r_offset
- 1);
3464 else if (type
== 0x03)
3467 bfd_put_8 (output_bfd
, 0x81,
3468 contents
+ rel
->r_offset
- 2);
3469 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3470 contents
+ rel
->r_offset
- 1);
3474 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3475 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3476 contents
+ rel
->r_offset
);
3478 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3479 contents
+ rel
->r_offset
);
3484 if (htab
->sgot
== NULL
)
3489 off
= h
->got
.offset
;
3490 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3494 if (local_got_offsets
== NULL
)
3497 off
= local_got_offsets
[r_symndx
];
3498 offplt
= local_tlsdesc_gotents
[r_symndx
];
3505 Elf_Internal_Rela outrel
;
3510 if (htab
->srelgot
== NULL
)
3513 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3515 if (GOT_TLS_GDESC_P (tls_type
))
3517 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3518 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3519 <= htab
->sgotplt
->size
);
3520 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3521 + htab
->sgotplt
->output_offset
3523 + htab
->sgotplt_jump_table_size
);
3524 sreloc
= htab
->srelplt
;
3525 loc
= sreloc
->contents
;
3526 loc
+= (htab
->next_tls_desc_index
++
3527 * sizeof (Elf32_External_Rel
));
3528 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3529 <= sreloc
->contents
+ sreloc
->size
);
3530 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3533 BFD_ASSERT (! unresolved_reloc
);
3534 bfd_put_32 (output_bfd
,
3535 relocation
- elf_i386_dtpoff_base (info
),
3536 htab
->sgotplt
->contents
+ offplt
3537 + htab
->sgotplt_jump_table_size
+ 4);
3541 bfd_put_32 (output_bfd
, 0,
3542 htab
->sgotplt
->contents
+ offplt
3543 + htab
->sgotplt_jump_table_size
+ 4);
3547 sreloc
= htab
->srelgot
;
3549 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3550 + htab
->sgot
->output_offset
+ off
);
3552 if (GOT_TLS_GD_P (tls_type
))
3553 dr_type
= R_386_TLS_DTPMOD32
;
3554 else if (GOT_TLS_GDESC_P (tls_type
))
3556 else if (tls_type
== GOT_TLS_IE_POS
)
3557 dr_type
= R_386_TLS_TPOFF
;
3559 dr_type
= R_386_TLS_TPOFF32
;
3561 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3562 bfd_put_32 (output_bfd
,
3563 relocation
- elf_i386_dtpoff_base (info
),
3564 htab
->sgot
->contents
+ off
);
3565 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3566 bfd_put_32 (output_bfd
,
3567 elf_i386_dtpoff_base (info
) - relocation
,
3568 htab
->sgot
->contents
+ off
);
3569 else if (dr_type
!= R_386_TLS_DESC
)
3570 bfd_put_32 (output_bfd
, 0,
3571 htab
->sgot
->contents
+ off
);
3572 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3574 loc
= sreloc
->contents
;
3575 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3576 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3577 <= sreloc
->contents
+ sreloc
->size
);
3578 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3580 if (GOT_TLS_GD_P (tls_type
))
3584 BFD_ASSERT (! unresolved_reloc
);
3585 bfd_put_32 (output_bfd
,
3586 relocation
- elf_i386_dtpoff_base (info
),
3587 htab
->sgot
->contents
+ off
+ 4);
3591 bfd_put_32 (output_bfd
, 0,
3592 htab
->sgot
->contents
+ off
+ 4);
3593 outrel
.r_info
= ELF32_R_INFO (indx
,
3594 R_386_TLS_DTPOFF32
);
3595 outrel
.r_offset
+= 4;
3596 sreloc
->reloc_count
++;
3597 loc
+= sizeof (Elf32_External_Rel
);
3598 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3599 <= sreloc
->contents
+ sreloc
->size
);
3600 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3603 else if (tls_type
== GOT_TLS_IE_BOTH
)
3605 bfd_put_32 (output_bfd
,
3607 ? relocation
- elf_i386_dtpoff_base (info
)
3609 htab
->sgot
->contents
+ off
+ 4);
3610 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3611 outrel
.r_offset
+= 4;
3612 sreloc
->reloc_count
++;
3613 loc
+= sizeof (Elf32_External_Rel
);
3614 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3621 local_got_offsets
[r_symndx
] |= 1;
3624 if (off
>= (bfd_vma
) -2
3625 && ! GOT_TLS_GDESC_P (tls_type
))
3627 if (r_type
== R_386_TLS_GOTDESC
3628 || r_type
== R_386_TLS_DESC_CALL
)
3630 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3631 unresolved_reloc
= FALSE
;
3633 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3635 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
3636 + htab
->sgotplt
->output_offset
;
3637 relocation
= htab
->sgot
->output_section
->vma
3638 + htab
->sgot
->output_offset
+ off
- g_o_t
;
3639 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3640 && tls_type
== GOT_TLS_IE_BOTH
)
3642 if (r_type
== R_386_TLS_IE
)
3643 relocation
+= g_o_t
;
3644 unresolved_reloc
= FALSE
;
3646 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3648 unsigned int val
, type
;
3651 /* GD->IE transition. */
3652 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3653 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3656 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3658 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3660 roff
= rel
->r_offset
- 3;
3664 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3666 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3667 roff
= rel
->r_offset
- 2;
3669 memcpy (contents
+ roff
,
3670 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3671 contents
[roff
+ 7] = 0x80 | (val
& 7);
3672 /* If foo is used only with foo@gotntpoff(%reg) and
3673 foo@indntpoff, but not with foo@gottpoff(%reg), change
3674 subl $foo@gottpoff(%reg), %eax
3676 addl $foo@gotntpoff(%reg), %eax. */
3677 if (tls_type
== GOT_TLS_IE_POS
)
3678 contents
[roff
+ 6] = 0x03;
3679 bfd_put_32 (output_bfd
,
3680 htab
->sgot
->output_section
->vma
3681 + htab
->sgot
->output_offset
+ off
3682 - htab
->sgotplt
->output_section
->vma
3683 - htab
->sgotplt
->output_offset
,
3684 contents
+ roff
+ 8);
3685 /* Skip R_386_PLT32. */
3689 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3691 /* GDesc -> IE transition.
3692 It's originally something like:
3693 leal x@tlsdesc(%ebx), %eax
3696 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3698 movl x@gottpoff(%ebx), %eax # before negl %eax
3700 Registers other than %eax may be set up here. */
3704 /* First, make sure it's a leal adding ebx to a 32-bit
3705 offset into any register, although it's probably
3706 almost always going to be eax. */
3707 roff
= rel
->r_offset
;
3709 /* Now modify the instruction as appropriate. */
3710 /* To turn a leal into a movl in the form we use it, it
3711 suffices to change the first byte from 0x8d to 0x8b.
3712 aoliva FIXME: should we decide to keep the leal, all
3713 we have to do is remove the statement below, and
3714 adjust the relaxation of R_386_TLS_DESC_CALL. */
3715 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3717 if (tls_type
== GOT_TLS_IE_BOTH
)
3720 bfd_put_32 (output_bfd
,
3721 htab
->sgot
->output_section
->vma
3722 + htab
->sgot
->output_offset
+ off
3723 - htab
->sgotplt
->output_section
->vma
3724 - htab
->sgotplt
->output_offset
,
3728 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3730 /* GDesc -> IE transition.
3738 depending on how we transformed the TLS_GOTDESC above.
3743 roff
= rel
->r_offset
;
3745 /* Now modify the instruction as appropriate. */
3746 if (tls_type
!= GOT_TLS_IE_NEG
)
3749 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3750 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3755 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3756 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3766 if (! elf_i386_tls_transition (info
, input_bfd
,
3767 input_section
, contents
,
3768 symtab_hdr
, sym_hashes
,
3769 &r_type
, GOT_UNKNOWN
, rel
,
3773 if (r_type
!= R_386_TLS_LDM
)
3775 /* LD->LE transition:
3776 leal foo(%reg), %eax; call ___tls_get_addr.
3778 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3779 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3780 memcpy (contents
+ rel
->r_offset
- 2,
3781 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3782 /* Skip R_386_PC32/R_386_PLT32. */
3787 if (htab
->sgot
== NULL
)
3790 off
= htab
->tls_ldm_got
.offset
;
3795 Elf_Internal_Rela outrel
;
3798 if (htab
->srelgot
== NULL
)
3801 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3802 + htab
->sgot
->output_offset
+ off
);
3804 bfd_put_32 (output_bfd
, 0,
3805 htab
->sgot
->contents
+ off
);
3806 bfd_put_32 (output_bfd
, 0,
3807 htab
->sgot
->contents
+ off
+ 4);
3808 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3809 loc
= htab
->srelgot
->contents
;
3810 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3811 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3812 htab
->tls_ldm_got
.offset
|= 1;
3814 relocation
= htab
->sgot
->output_section
->vma
3815 + htab
->sgot
->output_offset
+ off
3816 - htab
->sgotplt
->output_section
->vma
3817 - htab
->sgotplt
->output_offset
;
3818 unresolved_reloc
= FALSE
;
3821 case R_386_TLS_LDO_32
:
3822 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3823 relocation
-= elf_i386_dtpoff_base (info
);
3825 /* When converting LDO to LE, we must negate. */
3826 relocation
= -elf_i386_tpoff (info
, relocation
);
3829 case R_386_TLS_LE_32
:
3833 Elf_Internal_Rela outrel
;
3838 outrel
.r_offset
= rel
->r_offset
3839 + input_section
->output_section
->vma
3840 + input_section
->output_offset
;
3841 if (h
!= NULL
&& h
->dynindx
!= -1)
3845 if (r_type
== R_386_TLS_LE_32
)
3846 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3848 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3849 sreloc
= elf_section_data (input_section
)->sreloc
;
3852 loc
= sreloc
->contents
;
3853 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3854 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3857 else if (r_type
== R_386_TLS_LE_32
)
3858 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
3860 relocation
-= elf_i386_dtpoff_base (info
);
3862 else if (r_type
== R_386_TLS_LE_32
)
3863 relocation
= elf_i386_tpoff (info
, relocation
);
3865 relocation
= -elf_i386_tpoff (info
, relocation
);
3872 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3873 because such sections are not SEC_ALLOC and thus ld.so will
3874 not process them. */
3875 if (unresolved_reloc
3876 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3879 (*_bfd_error_handler
)
3880 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3883 (long) rel
->r_offset
,
3885 h
->root
.root
.string
);
3890 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3891 contents
, rel
->r_offset
,
3894 if (r
!= bfd_reloc_ok
)
3899 name
= h
->root
.root
.string
;
3902 name
= bfd_elf_string_from_elf_section (input_bfd
,
3903 symtab_hdr
->sh_link
,
3908 name
= bfd_section_name (input_bfd
, sec
);
3911 if (r
== bfd_reloc_overflow
)
3913 if (! ((*info
->callbacks
->reloc_overflow
)
3914 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3915 (bfd_vma
) 0, input_bfd
, input_section
,
3921 (*_bfd_error_handler
)
3922 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3923 input_bfd
, input_section
,
3924 (long) rel
->r_offset
, name
, (int) r
);
3933 /* Finish up dynamic symbol handling. We set the contents of various
3934 dynamic sections here. */
3937 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3938 struct bfd_link_info
*info
,
3939 struct elf_link_hash_entry
*h
,
3940 Elf_Internal_Sym
*sym
)
3942 struct elf_i386_link_hash_table
*htab
;
3944 htab
= elf_i386_hash_table (info
);
3946 if (h
->plt
.offset
!= (bfd_vma
) -1)
3950 Elf_Internal_Rela rel
;
3952 asection
*plt
, *gotplt
, *relplt
;
3954 /* When building a static executable, use .iplt, .igot.plt and
3955 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3956 if (htab
->splt
!= 0)
3959 gotplt
= htab
->sgotplt
;
3960 relplt
= htab
->srelplt
;
3965 gotplt
= htab
->igotplt
;
3966 relplt
= htab
->irelplt
;
3969 /* This symbol has an entry in the procedure linkage table. Set
3972 if ((h
->dynindx
== -1
3973 && !((h
->forced_local
|| info
->executable
)
3975 && h
->type
== STT_GNU_IFUNC
))
3981 /* Get the index in the procedure linkage table which
3982 corresponds to this symbol. This is the index of this symbol
3983 in all the symbols for which we are making plt entries. The
3984 first entry in the procedure linkage table is reserved.
3986 Get the offset into the .got table of the entry that
3987 corresponds to this function. Each .got entry is 4 bytes.
3988 The first three are reserved.
3990 For static executables, we don't reserve anything. */
3992 if (plt
== htab
->splt
)
3994 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3995 got_offset
= (plt_index
+ 3) * 4;
3999 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4000 got_offset
= plt_index
* 4;
4003 /* Fill in the entry in the procedure linkage table. */
4006 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4008 bfd_put_32 (output_bfd
,
4009 (gotplt
->output_section
->vma
4010 + gotplt
->output_offset
4012 plt
->contents
+ h
->plt
.offset
+ 2);
4014 if (htab
->is_vxworks
)
4016 int s
, k
, reloc_index
;
4018 /* Create the R_386_32 relocation referencing the GOT
4019 for this PLT entry. */
4021 /* S: Current slot number (zero-based). */
4022 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4023 /* K: Number of relocations for PLTResolve. */
4025 k
= PLTRESOLVE_RELOCS_SHLIB
;
4027 k
= PLTRESOLVE_RELOCS
;
4028 /* Skip the PLTresolve relocations, and the relocations for
4029 the other PLT slots. */
4030 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4031 loc
= (htab
->srelplt2
->contents
+ reloc_index
4032 * sizeof (Elf32_External_Rel
));
4034 rel
.r_offset
= (htab
->splt
->output_section
->vma
4035 + htab
->splt
->output_offset
4036 + h
->plt
.offset
+ 2),
4037 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4038 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4040 /* Create the R_386_32 relocation referencing the beginning of
4041 the PLT for this GOT entry. */
4042 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
4043 + htab
->sgotplt
->output_offset
4045 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4046 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4047 loc
+ sizeof (Elf32_External_Rel
));
4052 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4054 bfd_put_32 (output_bfd
, got_offset
,
4055 plt
->contents
+ h
->plt
.offset
+ 2);
4058 /* Don't fill PLT entry for static executables. */
4059 if (plt
== htab
->splt
)
4061 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4062 plt
->contents
+ h
->plt
.offset
+ 7);
4063 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4064 plt
->contents
+ h
->plt
.offset
+ 12);
4067 /* Fill in the entry in the global offset table. */
4068 bfd_put_32 (output_bfd
,
4069 (plt
->output_section
->vma
4070 + plt
->output_offset
4073 gotplt
->contents
+ got_offset
);
4075 /* Fill in the entry in the .rel.plt section. */
4076 rel
.r_offset
= (gotplt
->output_section
->vma
4077 + gotplt
->output_offset
4079 if (h
->dynindx
== -1
4080 || ((info
->executable
4081 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4083 && h
->type
== STT_GNU_IFUNC
))
4085 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4086 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4087 in the .got.plt section. */
4088 bfd_put_32 (output_bfd
,
4089 (h
->root
.u
.def
.value
4090 + h
->root
.u
.def
.section
->output_section
->vma
4091 + h
->root
.u
.def
.section
->output_offset
),
4092 gotplt
->contents
+ got_offset
);
4093 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4096 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4097 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4098 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4100 if (!h
->def_regular
)
4102 /* Mark the symbol as undefined, rather than as defined in
4103 the .plt section. Leave the value if there were any
4104 relocations where pointer equality matters (this is a clue
4105 for the dynamic linker, to make function pointer
4106 comparisons work between an application and shared
4107 library), otherwise set it to zero. If a function is only
4108 called from a binary, there is no need to slow down
4109 shared libraries because of that. */
4110 sym
->st_shndx
= SHN_UNDEF
;
4111 if (!h
->pointer_equality_needed
)
4116 if (h
->got
.offset
!= (bfd_vma
) -1
4117 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4118 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4120 Elf_Internal_Rela rel
;
4123 /* This symbol has an entry in the global offset table. Set it
4126 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
4129 rel
.r_offset
= (htab
->sgot
->output_section
->vma
4130 + htab
->sgot
->output_offset
4131 + (h
->got
.offset
& ~(bfd_vma
) 1));
4133 /* If this is a static link, or it is a -Bsymbolic link and the
4134 symbol is defined locally or was forced to be local because
4135 of a version file, we just want to emit a RELATIVE reloc.
4136 The entry in the global offset table will already have been
4137 initialized in the relocate_section function. */
4138 if ((info
->executable
4142 && h
->pointer_equality_needed
4143 && h
->type
== STT_GNU_IFUNC
)
4145 /* The STT_GNU_IFUNC symbol is locally defined. But we can't
4146 use .got.plt, which contains the real function addres,
4147 since we need pointer equality. We load the GOT entry
4148 with the PLT entry without relocation. */
4149 asection
*plt
= htab
->splt
? htab
->splt
: htab
->iplt
;
4150 if (htab
->sgot
== NULL
4151 || h
->plt
.offset
== (bfd_vma
) -1)
4153 bfd_put_32 (output_bfd
, (plt
->output_section
->vma
4154 + plt
->output_offset
+ h
->plt
.offset
),
4155 htab
->sgot
->contents
+ h
->got
.offset
);
4158 else if (info
->shared
4159 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4161 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4162 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4166 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4167 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4168 htab
->sgot
->contents
+ h
->got
.offset
);
4169 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4172 loc
= htab
->srelgot
->contents
;
4173 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4174 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4179 Elf_Internal_Rela rel
;
4182 /* This symbol needs a copy reloc. Set it up. */
4184 if (h
->dynindx
== -1
4185 || (h
->root
.type
!= bfd_link_hash_defined
4186 && h
->root
.type
!= bfd_link_hash_defweak
)
4187 || htab
->srelbss
== NULL
)
4190 rel
.r_offset
= (h
->root
.u
.def
.value
4191 + h
->root
.u
.def
.section
->output_section
->vma
4192 + h
->root
.u
.def
.section
->output_offset
);
4193 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4194 loc
= htab
->srelbss
->contents
;
4195 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4196 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4199 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
4200 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4201 is relative to the ".got" section. */
4202 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4203 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
))
4204 sym
->st_shndx
= SHN_ABS
;
4209 /* Used to decide how to sort relocs in an optimal manner for the
4210 dynamic linker, before writing them out. */
4212 static enum elf_reloc_type_class
4213 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4215 switch (ELF32_R_TYPE (rela
->r_info
))
4217 case R_386_RELATIVE
:
4218 return reloc_class_relative
;
4219 case R_386_JUMP_SLOT
:
4220 return reloc_class_plt
;
4222 return reloc_class_copy
;
4224 return reloc_class_normal
;
4228 /* Finish up the dynamic sections. */
4231 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4232 struct bfd_link_info
*info
)
4234 struct elf_i386_link_hash_table
*htab
;
4238 htab
= elf_i386_hash_table (info
);
4239 dynobj
= htab
->elf
.dynobj
;
4240 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4242 if (htab
->elf
.dynamic_sections_created
)
4244 Elf32_External_Dyn
*dyncon
, *dynconend
;
4246 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
4249 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4250 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4251 for (; dyncon
< dynconend
; dyncon
++)
4253 Elf_Internal_Dyn dyn
;
4256 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4261 if (htab
->is_vxworks
4262 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4268 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4273 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4278 dyn
.d_un
.d_val
= s
->size
;
4282 /* My reading of the SVR4 ABI indicates that the
4283 procedure linkage table relocs (DT_JMPREL) should be
4284 included in the overall relocs (DT_REL). This is
4285 what Solaris does. However, UnixWare can not handle
4286 that case. Therefore, we override the DT_RELSZ entry
4287 here to make it not include the JMPREL relocs. */
4291 dyn
.d_un
.d_val
-= s
->size
;
4295 /* We may not be using the standard ELF linker script.
4296 If .rel.plt is the first .rel section, we adjust
4297 DT_REL to not include it. */
4301 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4303 dyn
.d_un
.d_ptr
+= s
->size
;
4307 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4310 /* Fill in the first entry in the procedure linkage table. */
4311 if (htab
->splt
&& htab
->splt
->size
> 0)
4315 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
4316 sizeof (elf_i386_pic_plt0_entry
));
4317 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4318 htab
->plt0_pad_byte
,
4319 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4323 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
4324 sizeof(elf_i386_plt0_entry
));
4325 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4326 htab
->plt0_pad_byte
,
4327 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4328 bfd_put_32 (output_bfd
,
4329 (htab
->sgotplt
->output_section
->vma
4330 + htab
->sgotplt
->output_offset
4332 htab
->splt
->contents
+ 2);
4333 bfd_put_32 (output_bfd
,
4334 (htab
->sgotplt
->output_section
->vma
4335 + htab
->sgotplt
->output_offset
4337 htab
->splt
->contents
+ 8);
4339 if (htab
->is_vxworks
)
4341 Elf_Internal_Rela rel
;
4343 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4344 On IA32 we use REL relocations so the addend goes in
4345 the PLT directly. */
4346 rel
.r_offset
= (htab
->splt
->output_section
->vma
4347 + htab
->splt
->output_offset
4349 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4350 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4351 htab
->srelplt2
->contents
);
4352 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4353 rel
.r_offset
= (htab
->splt
->output_section
->vma
4354 + htab
->splt
->output_offset
4356 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4357 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4358 htab
->srelplt2
->contents
+
4359 sizeof (Elf32_External_Rel
));
4363 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4364 really seem like the right value. */
4365 elf_section_data (htab
->splt
->output_section
)
4366 ->this_hdr
.sh_entsize
= 4;
4368 /* Correct the .rel.plt.unloaded relocations. */
4369 if (htab
->is_vxworks
&& !info
->shared
)
4371 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4374 p
= htab
->srelplt2
->contents
;
4376 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4378 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4380 for (; num_plts
; num_plts
--)
4382 Elf_Internal_Rela rel
;
4383 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4384 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4385 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4386 p
+= sizeof (Elf32_External_Rel
);
4388 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4389 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4390 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4391 p
+= sizeof (Elf32_External_Rel
);
4399 /* Fill in the first three entries in the global offset table. */
4400 if (htab
->sgotplt
->size
> 0)
4402 bfd_put_32 (output_bfd
,
4404 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4405 htab
->sgotplt
->contents
);
4406 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
4407 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
4410 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4413 if (htab
->sgot
&& htab
->sgot
->size
> 0)
4414 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4419 /* Return address for Ith PLT stub in section PLT, for relocation REL
4420 or (bfd_vma) -1 if it should not be included. */
4423 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4424 const arelent
*rel ATTRIBUTE_UNUSED
)
4426 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4429 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4432 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4434 if (h
->plt
.offset
!= (bfd_vma
) -1
4436 && !h
->pointer_equality_needed
)
4439 return _bfd_elf_hash_symbol (h
);
4442 /* Hook called by the linker routine which adds symbols from an object
4446 elf_i386_add_symbol_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
4447 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4448 Elf_Internal_Sym
* sym
,
4449 const char ** namep ATTRIBUTE_UNUSED
,
4450 flagword
* flagsp ATTRIBUTE_UNUSED
,
4451 asection
** secp ATTRIBUTE_UNUSED
,
4452 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4454 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4455 elf_tdata (info
->output_bfd
)->has_ifunc_symbols
= TRUE
;
4460 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4461 #define TARGET_LITTLE_NAME "elf32-i386"
4462 #define ELF_ARCH bfd_arch_i386
4463 #define ELF_MACHINE_CODE EM_386
4464 #define ELF_MAXPAGESIZE 0x1000
4466 #define elf_backend_can_gc_sections 1
4467 #define elf_backend_can_refcount 1
4468 #define elf_backend_want_got_plt 1
4469 #define elf_backend_plt_readonly 1
4470 #define elf_backend_want_plt_sym 0
4471 #define elf_backend_got_header_size 12
4473 /* Support RELA for objdump of prelink objects. */
4474 #define elf_info_to_howto elf_i386_info_to_howto_rel
4475 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4477 #define bfd_elf32_mkobject elf_i386_mkobject
4479 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4480 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4481 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4482 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4484 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4485 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4486 #define elf_backend_check_relocs elf_i386_check_relocs
4487 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4488 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4489 #define elf_backend_fake_sections elf_i386_fake_sections
4490 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4491 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4492 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4493 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4494 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4495 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4496 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4497 #define elf_backend_relocate_section elf_i386_relocate_section
4498 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4499 #define elf_backend_always_size_sections elf_i386_always_size_sections
4500 #define elf_backend_omit_section_dynsym \
4501 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4502 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4503 #define elf_backend_hash_symbol elf_i386_hash_symbol
4504 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4505 #undef elf_backend_post_process_headers
4506 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4508 #include "elf32-target.h"
4510 /* FreeBSD support. */
4512 #undef TARGET_LITTLE_SYM
4513 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4514 #undef TARGET_LITTLE_NAME
4515 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4517 #define ELF_OSABI ELFOSABI_FREEBSD
4519 /* The kernel recognizes executables as valid only if they carry a
4520 "FreeBSD" label in the ELF header. So we put this label on all
4521 executables and (for simplicity) also all other object files. */
4524 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4526 _bfd_elf_set_osabi (abfd
, info
);
4528 #ifdef OLD_FREEBSD_ABI_LABEL
4529 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4530 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4534 #undef elf_backend_post_process_headers
4535 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4537 #define elf32_bed elf32_i386_fbsd_bed
4539 #undef elf_backend_add_symbol_hook
4541 #include "elf32-target.h"
4543 /* VxWorks support. */
4545 #undef TARGET_LITTLE_SYM
4546 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4547 #undef TARGET_LITTLE_NAME
4548 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4551 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4553 static struct bfd_link_hash_table
*
4554 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4556 struct bfd_link_hash_table
*ret
;
4557 struct elf_i386_link_hash_table
*htab
;
4559 ret
= elf_i386_link_hash_table_create (abfd
);
4562 htab
= (struct elf_i386_link_hash_table
*) ret
;
4563 htab
->is_vxworks
= 1;
4564 htab
->plt0_pad_byte
= 0x90;
4571 #undef elf_backend_relocs_compatible
4572 #undef elf_backend_post_process_headers
4573 #undef bfd_elf32_bfd_link_hash_table_create
4574 #define bfd_elf32_bfd_link_hash_table_create \
4575 elf_i386_vxworks_link_hash_table_create
4576 #undef elf_backend_add_symbol_hook
4577 #define elf_backend_add_symbol_hook \
4578 elf_vxworks_add_symbol_hook
4579 #undef elf_backend_link_output_symbol_hook
4580 #define elf_backend_link_output_symbol_hook \
4581 elf_vxworks_link_output_symbol_hook
4582 #undef elf_backend_emit_relocs
4583 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4584 #undef elf_backend_final_write_processing
4585 #define elf_backend_final_write_processing \
4586 elf_vxworks_final_write_processing
4588 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4590 #undef elf_backend_want_plt_sym
4591 #define elf_backend_want_plt_sym 1
4594 #define elf32_bed elf32_i386_vxworks_bed
4596 #include "elf32-target.h"