1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table
[]=
40 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
41 bfd_elf_generic_reloc
, "R_386_NONE",
42 TRUE
, 0x00000000, 0x00000000, FALSE
),
43 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_32",
45 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
46 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_PC32",
48 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
49 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_GOT32",
51 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
52 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_PLT32",
54 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
55 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_COPY",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_RELATIVE",
66 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
67 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_386_GOTOFF",
69 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
70 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
71 bfd_elf_generic_reloc
, "R_386_GOTPC",
72 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_IE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_LE",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_TLS_GD",
96 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
97 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
99 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
100 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_16",
102 TRUE
, 0xffff, 0xffff, FALSE
),
103 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_PC16",
105 TRUE
, 0xffff, 0xffff, TRUE
),
106 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_386_8",
108 TRUE
, 0xff, 0xff, FALSE
),
109 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
110 bfd_elf_generic_reloc
, "R_386_PC8",
111 TRUE
, 0xff, 0xff, TRUE
),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
135 bfd_elf_generic_reloc
, "R_386_SIZE32",
136 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
137 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
139 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
140 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
146 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
148 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT
, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE
, /* pc_relative */
161 complain_overflow_dont
, /* complain_on_overflow */
162 NULL
, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE
, /* partial_inplace */
167 FALSE
), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY
, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE
, /* pc_relative */
176 complain_overflow_dont
, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE
, /* partial_inplace */
182 FALSE
) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type
*
196 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
197 bfd_reloc_code_real_type code
)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table
[R_386_NONE
];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table
[R_386_32
];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table
[R_386_32
];
213 case BFD_RELOC_32_PCREL
:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table
[R_386_PC32
];
217 case BFD_RELOC_386_GOT32
:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table
[R_386_GOT32
];
221 case BFD_RELOC_386_PLT32
:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table
[R_386_PLT32
];
225 case BFD_RELOC_386_COPY
:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table
[R_386_COPY
];
229 case BFD_RELOC_386_GLOB_DAT
:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table
[R_386_GLOB_DAT
];
233 case BFD_RELOC_386_JUMP_SLOT
:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table
[R_386_JUMP_SLOT
];
237 case BFD_RELOC_386_RELATIVE
:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table
[R_386_RELATIVE
];
241 case BFD_RELOC_386_GOTOFF
:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table
[R_386_GOTOFF
];
245 case BFD_RELOC_386_GOTPC
:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table
[R_386_GOTPC
];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF
:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
254 case BFD_RELOC_386_TLS_IE
:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_GOTIE
:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_LE
:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_GD
:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_LDM
:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
278 case BFD_RELOC_16_PCREL
:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
286 case BFD_RELOC_8_PCREL
:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32
:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
295 case BFD_RELOC_386_TLS_IE_32
:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_LE_32
:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_DTPMOD32
:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPOFF32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_TPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_SIZE32
:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
319 case BFD_RELOC_386_TLS_GOTDESC
:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_DESC_CALL
:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC
:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
331 case BFD_RELOC_386_IRELATIVE
:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
335 case BFD_RELOC_VTABLE_INHERIT
:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
339 case BFD_RELOC_VTABLE_ENTRY
:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
351 static reloc_howto_type
*
352 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
357 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
358 if (elf_howto_table
[i
].name
!= NULL
359 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
360 return &elf_howto_table
[i
];
365 static reloc_howto_type
*
366 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
370 if ((indx
= r_type
) >= R_386_standard
371 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
372 >= R_386_ext
- R_386_standard
)
373 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
374 >= R_386_irelative
- R_386_ext
)
375 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
376 >= R_386_vt
- R_386_irelative
))
378 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table
[indx
].type
!= r_type
)
385 return &elf_howto_table
[indx
];
389 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
391 Elf_Internal_Rela
*dst
)
393 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
394 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
406 if (name
[0] == '.' && name
[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd
, name
);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
420 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
422 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
428 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
431 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
435 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
439 switch (note
->descsz
)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
449 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
461 size
, note
->descpos
+ offset
);
465 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
467 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
469 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
474 elf_tdata (abfd
)->core
->program
475 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
476 elf_tdata (abfd
)->core
->command
477 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
481 switch (note
->descsz
)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd
)->core
->pid
488 = bfd_get_32 (abfd
, note
->descdata
+ 12);
489 elf_tdata (abfd
)->core
->program
490 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
491 elf_tdata (abfd
)->core
->command
492 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command
= elf_tdata (abfd
)->core
->command
;
501 int n
= strlen (command
);
503 if (0 < n
&& command
[n
- 1] == ' ')
504 command
[n
- 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry
[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* Entries in the GOT procedure linkage table look like this. */
587 static const bfd_byte elf_i386_got_plt_entry
[8] =
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
594 /* Entries in the PIC GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* .eh_frame covering the .plt section. */
605 static const bfd_byte elf_i386_eh_frame_plt
[] =
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
620 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop
, DW_CFA_nop
,
624 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
638 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
639 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
642 struct elf_i386_plt_layout
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte
*plt0_entry
;
646 unsigned int plt0_entry_size
;
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset
;
650 unsigned int plt0_got2_offset
;
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte
*plt_entry
;
654 unsigned int plt_entry_size
;
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset
;
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte
*pic_plt0_entry
;
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte
*pic_plt_entry
;
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte
*eh_frame_plt
;
672 unsigned int eh_frame_plt_size
;
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt
=
681 elf_i386_plt0_entry
, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry
, /* plt_entry */
686 PLT_ENTRY_SIZE
, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry
, /* pic_plt_entry */
693 elf_i386_eh_frame_plt
, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
704 /* Architecture-specific backend data for i386. */
706 struct elf_i386_backend_data
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout
*plt
;
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte
;
714 /* True if the target system is VxWorks. */
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed
=
725 &elf_i386_plt
, /* plt */
726 0, /* plt0_pad_byte */
730 #define elf_backend_arch_data &elf_i386_arch_bed
732 /* i386 ELF linker hash entry. */
734 struct elf_i386_link_hash_entry
736 struct elf_link_hash_entry elf
;
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs
*dyn_relocs
;
741 #define GOT_UNKNOWN 0
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type
;
759 /* Information about the GOT PLT entry. Filled when there are both
760 GOT and PLT relocations against the same function. */
761 union gotplt_union plt_got
;
763 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
764 starting at the end of the jump table. */
768 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
770 struct elf_i386_obj_tdata
772 struct elf_obj_tdata root
;
774 /* tls_type for each local got entry. */
775 char *local_got_tls_type
;
777 /* GOTPLT entries for TLS descriptors. */
778 bfd_vma
*local_tlsdesc_gotent
;
781 #define elf_i386_tdata(abfd) \
782 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
784 #define elf_i386_local_got_tls_type(abfd) \
785 (elf_i386_tdata (abfd)->local_got_tls_type)
787 #define elf_i386_local_tlsdesc_gotent(abfd) \
788 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
790 #define is_i386_elf(bfd) \
791 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
792 && elf_tdata (bfd) != NULL \
793 && elf_object_id (bfd) == I386_ELF_DATA)
796 elf_i386_mkobject (bfd
*abfd
)
798 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
802 /* i386 ELF linker hash table. */
804 struct elf_i386_link_hash_table
806 struct elf_link_hash_table elf
;
808 /* Short-cuts to get to dynamic linker sections. */
811 asection
*plt_eh_frame
;
816 bfd_signed_vma refcount
;
820 /* The amount of space used by the reserved portion of the sgotplt
821 section, plus whatever space is used by the jump slots. */
822 bfd_vma sgotplt_jump_table_size
;
824 /* Small local sym cache. */
825 struct sym_cache sym_cache
;
827 /* _TLS_MODULE_BASE_ symbol. */
828 struct bfd_link_hash_entry
*tls_module_base
;
830 /* Used by local STT_GNU_IFUNC symbols. */
831 htab_t loc_hash_table
;
832 void * loc_hash_memory
;
834 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
837 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
838 bfd_vma next_tls_desc_index
;
840 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
841 bfd_vma next_jump_slot_index
;
843 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
844 bfd_vma next_irelative_index
;
847 /* Get the i386 ELF linker hash table from a link_info structure. */
849 #define elf_i386_hash_table(p) \
850 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
851 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
853 #define elf_i386_compute_jump_table_size(htab) \
854 ((htab)->elf.srelplt->reloc_count * 4)
856 /* Create an entry in an i386 ELF linker hash table. */
858 static struct bfd_hash_entry
*
859 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
860 struct bfd_hash_table
*table
,
863 /* Allocate the structure if it has not already been allocated by a
867 entry
= (struct bfd_hash_entry
*)
868 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
873 /* Call the allocation method of the superclass. */
874 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
877 struct elf_i386_link_hash_entry
*eh
;
879 eh
= (struct elf_i386_link_hash_entry
*) entry
;
880 eh
->dyn_relocs
= NULL
;
881 eh
->tls_type
= GOT_UNKNOWN
;
882 eh
->plt_got
.offset
= (bfd_vma
) -1;
883 eh
->tlsdesc_got
= (bfd_vma
) -1;
889 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
890 for local symbol so that we can handle local STT_GNU_IFUNC symbols
891 as global symbol. We reuse indx and dynstr_index for local symbol
892 hash since they aren't used by global symbols in this backend. */
895 elf_i386_local_htab_hash (const void *ptr
)
897 struct elf_link_hash_entry
*h
898 = (struct elf_link_hash_entry
*) ptr
;
899 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
902 /* Compare local hash entries. */
905 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
907 struct elf_link_hash_entry
*h1
908 = (struct elf_link_hash_entry
*) ptr1
;
909 struct elf_link_hash_entry
*h2
910 = (struct elf_link_hash_entry
*) ptr2
;
912 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
915 /* Find and/or create a hash entry for local symbol. */
917 static struct elf_link_hash_entry
*
918 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
919 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
922 struct elf_i386_link_hash_entry e
, *ret
;
923 asection
*sec
= abfd
->sections
;
924 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
925 ELF32_R_SYM (rel
->r_info
));
928 e
.elf
.indx
= sec
->id
;
929 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
930 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
931 create
? INSERT
: NO_INSERT
);
938 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
942 ret
= (struct elf_i386_link_hash_entry
*)
943 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
944 sizeof (struct elf_i386_link_hash_entry
));
947 memset (ret
, 0, sizeof (*ret
));
948 ret
->elf
.indx
= sec
->id
;
949 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
950 ret
->elf
.dynindx
= -1;
951 ret
->plt_got
.offset
= (bfd_vma
) -1;
957 /* Destroy an i386 ELF linker hash table. */
960 elf_i386_link_hash_table_free (bfd
*obfd
)
962 struct elf_i386_link_hash_table
*htab
963 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
965 if (htab
->loc_hash_table
)
966 htab_delete (htab
->loc_hash_table
);
967 if (htab
->loc_hash_memory
)
968 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
969 _bfd_elf_link_hash_table_free (obfd
);
972 /* Create an i386 ELF linker hash table. */
974 static struct bfd_link_hash_table
*
975 elf_i386_link_hash_table_create (bfd
*abfd
)
977 struct elf_i386_link_hash_table
*ret
;
978 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
980 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
984 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
985 elf_i386_link_hash_newfunc
,
986 sizeof (struct elf_i386_link_hash_entry
),
993 ret
->loc_hash_table
= htab_try_create (1024,
994 elf_i386_local_htab_hash
,
995 elf_i386_local_htab_eq
,
997 ret
->loc_hash_memory
= objalloc_create ();
998 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1000 elf_i386_link_hash_table_free (abfd
);
1003 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1005 return &ret
->elf
.root
;
1008 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1009 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1013 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1015 struct elf_i386_link_hash_table
*htab
;
1017 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1020 htab
= elf_i386_hash_table (info
);
1024 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1026 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rel.bss");
1029 || (!info
->shared
&& !htab
->srelbss
))
1032 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1033 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1037 if (!info
->no_ld_generated_unwind_info
1038 && htab
->plt_eh_frame
== NULL
1039 && htab
->elf
.splt
!= NULL
)
1041 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1042 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1043 | SEC_LINKER_CREATED
);
1045 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1046 if (htab
->plt_eh_frame
== NULL
1047 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1054 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1057 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1058 struct elf_link_hash_entry
*dir
,
1059 struct elf_link_hash_entry
*ind
)
1061 struct elf_i386_link_hash_entry
*edir
, *eind
;
1063 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1064 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1066 if (eind
->dyn_relocs
!= NULL
)
1068 if (edir
->dyn_relocs
!= NULL
)
1070 struct elf_dyn_relocs
**pp
;
1071 struct elf_dyn_relocs
*p
;
1073 /* Add reloc counts against the indirect sym to the direct sym
1074 list. Merge any entries against the same section. */
1075 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1077 struct elf_dyn_relocs
*q
;
1079 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1080 if (q
->sec
== p
->sec
)
1082 q
->pc_count
+= p
->pc_count
;
1083 q
->count
+= p
->count
;
1090 *pp
= edir
->dyn_relocs
;
1093 edir
->dyn_relocs
= eind
->dyn_relocs
;
1094 eind
->dyn_relocs
= NULL
;
1097 if (ind
->root
.type
== bfd_link_hash_indirect
1098 && dir
->got
.refcount
<= 0)
1100 edir
->tls_type
= eind
->tls_type
;
1101 eind
->tls_type
= GOT_UNKNOWN
;
1104 if (ELIMINATE_COPY_RELOCS
1105 && ind
->root
.type
!= bfd_link_hash_indirect
1106 && dir
->dynamic_adjusted
)
1108 /* If called to transfer flags for a weakdef during processing
1109 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1110 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1111 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1112 dir
->ref_regular
|= ind
->ref_regular
;
1113 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1114 dir
->needs_plt
|= ind
->needs_plt
;
1115 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1118 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1121 /* Return TRUE if the TLS access code sequence support transition
1125 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1127 Elf_Internal_Shdr
*symtab_hdr
,
1128 struct elf_link_hash_entry
**sym_hashes
,
1129 unsigned int r_type
,
1130 const Elf_Internal_Rela
*rel
,
1131 const Elf_Internal_Rela
*relend
)
1133 unsigned int val
, type
;
1134 unsigned long r_symndx
;
1135 struct elf_link_hash_entry
*h
;
1138 /* Get the section contents. */
1139 if (contents
== NULL
)
1141 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1142 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1145 /* FIXME: How to better handle error condition? */
1146 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1149 /* Cache the section contents for elf_link_input_bfd. */
1150 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1154 offset
= rel
->r_offset
;
1159 if (offset
< 2 || (rel
+ 1) >= relend
)
1162 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1163 if (r_type
== R_386_TLS_GD
)
1165 /* Check transition from GD access model. Only
1166 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1167 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1168 can transit to different access model. */
1169 if ((offset
+ 10) > sec
->size
||
1170 (type
!= 0x8d && type
!= 0x04))
1173 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1176 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1180 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1183 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1188 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1189 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1192 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1198 /* Check transition from LD access model. Only
1199 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1200 can transit to different access model. */
1201 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1204 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1205 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1209 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1212 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1213 if (r_symndx
< symtab_hdr
->sh_info
)
1216 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1217 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1218 may be versioned. */
1220 && h
->root
.root
.string
!= NULL
1221 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1222 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1223 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1227 /* Check transition from IE access model:
1228 movl foo@indntpoff(%rip), %eax
1229 movl foo@indntpoff(%rip), %reg
1230 addl foo@indntpoff(%rip), %reg
1233 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1236 /* Check "movl foo@tpoff(%rip), %eax" first. */
1237 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1244 /* Check movl|addl foo@tpoff(%rip), %reg. */
1245 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1246 return ((type
== 0x8b || type
== 0x03)
1247 && (val
& 0xc7) == 0x05);
1249 case R_386_TLS_GOTIE
:
1250 case R_386_TLS_IE_32
:
1251 /* Check transition from {IE_32,GOTIE} access model:
1252 subl foo@{tpoff,gontoff}(%reg1), %reg2
1253 movl foo@{tpoff,gontoff}(%reg1), %reg2
1254 addl foo@{tpoff,gontoff}(%reg1), %reg2
1257 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1260 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1261 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1264 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1265 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1267 case R_386_TLS_GOTDESC
:
1268 /* Check transition from GDesc access model:
1269 leal x@tlsdesc(%ebx), %eax
1271 Make sure it's a leal adding ebx to a 32-bit offset
1272 into any register, although it's probably almost always
1275 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1278 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1281 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1282 return (val
& 0xc7) == 0x83;
1284 case R_386_TLS_DESC_CALL
:
1285 /* Check transition from GDesc access model:
1286 call *x@tlsdesc(%rax)
1288 if (offset
+ 2 <= sec
->size
)
1290 /* Make sure that it's a call *x@tlsdesc(%rax). */
1291 static const unsigned char call
[] = { 0xff, 0x10 };
1292 return memcmp (contents
+ offset
, call
, 2) == 0;
1302 /* Return TRUE if the TLS access transition is OK or no transition
1303 will be performed. Update R_TYPE if there is a transition. */
1306 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1307 asection
*sec
, bfd_byte
*contents
,
1308 Elf_Internal_Shdr
*symtab_hdr
,
1309 struct elf_link_hash_entry
**sym_hashes
,
1310 unsigned int *r_type
, int tls_type
,
1311 const Elf_Internal_Rela
*rel
,
1312 const Elf_Internal_Rela
*relend
,
1313 struct elf_link_hash_entry
*h
,
1314 unsigned long r_symndx
)
1316 unsigned int from_type
= *r_type
;
1317 unsigned int to_type
= from_type
;
1318 bfd_boolean check
= TRUE
;
1320 /* Skip TLS transition for functions. */
1322 && (h
->type
== STT_FUNC
1323 || h
->type
== STT_GNU_IFUNC
))
1329 case R_386_TLS_GOTDESC
:
1330 case R_386_TLS_DESC_CALL
:
1331 case R_386_TLS_IE_32
:
1333 case R_386_TLS_GOTIE
:
1334 if (info
->executable
)
1337 to_type
= R_386_TLS_LE_32
;
1338 else if (from_type
!= R_386_TLS_IE
1339 && from_type
!= R_386_TLS_GOTIE
)
1340 to_type
= R_386_TLS_IE_32
;
1343 /* When we are called from elf_i386_relocate_section, CONTENTS
1344 isn't NULL and there may be additional transitions based on
1346 if (contents
!= NULL
)
1348 unsigned int new_to_type
= to_type
;
1350 if (info
->executable
1353 && (tls_type
& GOT_TLS_IE
))
1354 new_to_type
= R_386_TLS_LE_32
;
1356 if (to_type
== R_386_TLS_GD
1357 || to_type
== R_386_TLS_GOTDESC
1358 || to_type
== R_386_TLS_DESC_CALL
)
1360 if (tls_type
== GOT_TLS_IE_POS
)
1361 new_to_type
= R_386_TLS_GOTIE
;
1362 else if (tls_type
& GOT_TLS_IE
)
1363 new_to_type
= R_386_TLS_IE_32
;
1366 /* We checked the transition before when we were called from
1367 elf_i386_check_relocs. We only want to check the new
1368 transition which hasn't been checked before. */
1369 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1370 to_type
= new_to_type
;
1376 if (info
->executable
)
1377 to_type
= R_386_TLS_LE_32
;
1384 /* Return TRUE if there is no transition. */
1385 if (from_type
== to_type
)
1388 /* Check if the transition can be performed. */
1390 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1391 symtab_hdr
, sym_hashes
,
1392 from_type
, rel
, relend
))
1394 reloc_howto_type
*from
, *to
;
1397 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1398 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1401 name
= h
->root
.root
.string
;
1404 struct elf_i386_link_hash_table
*htab
;
1406 htab
= elf_i386_hash_table (info
);
1411 Elf_Internal_Sym
*isym
;
1413 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1415 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1419 (*_bfd_error_handler
)
1420 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1421 "in section `%A' failed"),
1422 abfd
, sec
, from
->name
, to
->name
, name
,
1423 (unsigned long) rel
->r_offset
);
1424 bfd_set_error (bfd_error_bad_value
);
1432 /* Rename some of the generic section flags to better document how they
1434 #define need_convert_mov_to_lea sec_flg0
1436 /* Look through the relocs for a section during the first phase, and
1437 calculate needed space in the global offset table, procedure linkage
1438 table, and dynamic reloc sections. */
1441 elf_i386_check_relocs (bfd
*abfd
,
1442 struct bfd_link_info
*info
,
1444 const Elf_Internal_Rela
*relocs
)
1446 struct elf_i386_link_hash_table
*htab
;
1447 Elf_Internal_Shdr
*symtab_hdr
;
1448 struct elf_link_hash_entry
**sym_hashes
;
1449 const Elf_Internal_Rela
*rel
;
1450 const Elf_Internal_Rela
*rel_end
;
1452 bfd_boolean use_plt_got
;
1454 if (info
->relocatable
)
1457 BFD_ASSERT (is_i386_elf (abfd
));
1459 htab
= elf_i386_hash_table (info
);
1463 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1464 && (get_elf_i386_backend_data (abfd
)
1465 == &elf_i386_arch_bed
));
1467 symtab_hdr
= &elf_symtab_hdr (abfd
);
1468 sym_hashes
= elf_sym_hashes (abfd
);
1472 rel_end
= relocs
+ sec
->reloc_count
;
1473 for (rel
= relocs
; rel
< rel_end
; rel
++)
1475 unsigned int r_type
;
1476 unsigned long r_symndx
;
1477 struct elf_link_hash_entry
*h
;
1478 Elf_Internal_Sym
*isym
;
1480 bfd_boolean size_reloc
;
1482 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1483 r_type
= ELF32_R_TYPE (rel
->r_info
);
1485 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1487 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1493 if (r_symndx
< symtab_hdr
->sh_info
)
1495 /* A local symbol. */
1496 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1501 /* Check relocation against local STT_GNU_IFUNC symbol. */
1502 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1504 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1508 /* Fake a STT_GNU_IFUNC symbol. */
1509 h
->type
= STT_GNU_IFUNC
;
1512 h
->forced_local
= 1;
1513 h
->root
.type
= bfd_link_hash_defined
;
1521 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1522 while (h
->root
.type
== bfd_link_hash_indirect
1523 || h
->root
.type
== bfd_link_hash_warning
)
1524 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1529 /* Create the ifunc sections for static executables. If we
1530 never see an indirect function symbol nor we are building
1531 a static executable, those sections will be empty and
1532 won't appear in output. */
1543 if (htab
->elf
.dynobj
== NULL
)
1544 htab
->elf
.dynobj
= abfd
;
1545 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1550 /* It is referenced by a non-shared object. */
1552 h
->root
.non_ir_ref
= 1;
1555 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1556 symtab_hdr
, sym_hashes
,
1557 &r_type
, GOT_UNKNOWN
,
1558 rel
, rel_end
, h
, r_symndx
))
1564 htab
->tls_ldm_got
.refcount
+= 1;
1568 /* This symbol requires a procedure linkage table entry. We
1569 actually build the entry in adjust_dynamic_symbol,
1570 because this might be a case of linking PIC code which is
1571 never referenced by a dynamic object, in which case we
1572 don't need to generate a procedure linkage table entry
1575 /* If this is a local symbol, we resolve it directly without
1576 creating a procedure linkage table entry. */
1581 h
->plt
.refcount
+= 1;
1588 case R_386_TLS_IE_32
:
1590 case R_386_TLS_GOTIE
:
1591 if (!info
->executable
)
1592 info
->flags
|= DF_STATIC_TLS
;
1597 case R_386_TLS_GOTDESC
:
1598 case R_386_TLS_DESC_CALL
:
1599 /* This symbol requires a global offset table entry. */
1601 int tls_type
, old_tls_type
;
1606 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1607 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1608 case R_386_TLS_GOTDESC
:
1609 case R_386_TLS_DESC_CALL
:
1610 tls_type
= GOT_TLS_GDESC
; break;
1611 case R_386_TLS_IE_32
:
1612 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1613 tls_type
= GOT_TLS_IE_NEG
;
1615 /* If this is a GD->IE transition, we may use either of
1616 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1617 tls_type
= GOT_TLS_IE
;
1620 case R_386_TLS_GOTIE
:
1621 tls_type
= GOT_TLS_IE_POS
; break;
1626 h
->got
.refcount
+= 1;
1627 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1631 bfd_signed_vma
*local_got_refcounts
;
1633 /* This is a global offset table entry for a local symbol. */
1634 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1635 if (local_got_refcounts
== NULL
)
1639 size
= symtab_hdr
->sh_info
;
1640 size
*= (sizeof (bfd_signed_vma
)
1641 + sizeof (bfd_vma
) + sizeof(char));
1642 local_got_refcounts
= (bfd_signed_vma
*)
1643 bfd_zalloc (abfd
, size
);
1644 if (local_got_refcounts
== NULL
)
1646 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1647 elf_i386_local_tlsdesc_gotent (abfd
)
1648 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1649 elf_i386_local_got_tls_type (abfd
)
1650 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1652 local_got_refcounts
[r_symndx
] += 1;
1653 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1656 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1657 tls_type
|= old_tls_type
;
1658 /* If a TLS symbol is accessed using IE at least once,
1659 there is no point to use dynamic model for it. */
1660 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1661 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1662 || (tls_type
& GOT_TLS_IE
) == 0))
1664 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1665 tls_type
= old_tls_type
;
1666 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1667 && GOT_TLS_GD_ANY_P (tls_type
))
1668 tls_type
|= old_tls_type
;
1672 name
= h
->root
.root
.string
;
1674 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1676 (*_bfd_error_handler
)
1677 (_("%B: `%s' accessed both as normal and "
1678 "thread local symbol"),
1680 bfd_set_error (bfd_error_bad_value
);
1685 if (old_tls_type
!= tls_type
)
1688 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1690 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1698 if (htab
->elf
.sgot
== NULL
)
1700 if (htab
->elf
.dynobj
== NULL
)
1701 htab
->elf
.dynobj
= abfd
;
1702 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1705 if (r_type
!= R_386_TLS_IE
)
1709 case R_386_TLS_LE_32
:
1711 if (info
->executable
)
1713 info
->flags
|= DF_STATIC_TLS
;
1718 if (h
!= NULL
&& info
->executable
)
1720 /* If this reloc is in a read-only section, we might
1721 need a copy reloc. We can't check reliably at this
1722 stage whether the section is read-only, as input
1723 sections have not yet been mapped to output sections.
1724 Tentatively set the flag for now, and correct in
1725 adjust_dynamic_symbol. */
1728 /* We may need a .plt entry if the function this reloc
1729 refers to is in a shared lib. */
1730 h
->plt
.refcount
+= 1;
1731 if (r_type
!= R_386_PC32
)
1732 h
->pointer_equality_needed
= 1;
1737 /* If we are creating a shared library, and this is a reloc
1738 against a global symbol, or a non PC relative reloc
1739 against a local symbol, then we need to copy the reloc
1740 into the shared library. However, if we are linking with
1741 -Bsymbolic, we do not need to copy a reloc against a
1742 global symbol which is defined in an object we are
1743 including in the link (i.e., DEF_REGULAR is set). At
1744 this point we have not seen all the input files, so it is
1745 possible that DEF_REGULAR is not set now but will be set
1746 later (it is never cleared). In case of a weak definition,
1747 DEF_REGULAR may be cleared later by a strong definition in
1748 a shared library. We account for that possibility below by
1749 storing information in the relocs_copied field of the hash
1750 table entry. A similar situation occurs when creating
1751 shared libraries and symbol visibility changes render the
1754 If on the other hand, we are creating an executable, we
1755 may need to keep relocations for symbols satisfied by a
1756 dynamic library if we manage to avoid copy relocs for the
1759 && (sec
->flags
& SEC_ALLOC
) != 0
1760 && (r_type
!= R_386_PC32
1762 && (! SYMBOLIC_BIND (info
, h
)
1763 || h
->root
.type
== bfd_link_hash_defweak
1764 || !h
->def_regular
))))
1765 || (ELIMINATE_COPY_RELOCS
1767 && (sec
->flags
& SEC_ALLOC
) != 0
1769 && (h
->root
.type
== bfd_link_hash_defweak
1770 || !h
->def_regular
)))
1772 struct elf_dyn_relocs
*p
;
1773 struct elf_dyn_relocs
**head
;
1775 /* We must copy these reloc types into the output file.
1776 Create a reloc section in dynobj and make room for
1780 if (htab
->elf
.dynobj
== NULL
)
1781 htab
->elf
.dynobj
= abfd
;
1783 sreloc
= _bfd_elf_make_dynamic_reloc_section
1784 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1790 /* If this is a global symbol, we count the number of
1791 relocations we need for this symbol. */
1794 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1798 /* Track dynamic relocs needed for local syms too.
1799 We really need local syms available to do this
1804 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1809 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1813 vpp
= &elf_section_data (s
)->local_dynrel
;
1814 head
= (struct elf_dyn_relocs
**)vpp
;
1818 if (p
== NULL
|| p
->sec
!= sec
)
1820 bfd_size_type amt
= sizeof *p
;
1821 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1833 /* Count size relocation as PC-relative relocation. */
1834 if (r_type
== R_386_PC32
|| size_reloc
)
1839 /* This relocation describes the C++ object vtable hierarchy.
1840 Reconstruct it for later use during GC. */
1841 case R_386_GNU_VTINHERIT
:
1842 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1846 /* This relocation describes which C++ vtable entries are actually
1847 used. Record for later use during GC. */
1848 case R_386_GNU_VTENTRY
:
1849 BFD_ASSERT (h
!= NULL
);
1851 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1861 && h
->plt
.refcount
> 0
1862 && h
->got
.refcount
> 0
1863 && htab
->plt_got
== NULL
)
1865 /* Create the GOT procedure linkage table. */
1866 unsigned int plt_got_align
;
1867 const struct elf_backend_data
*bed
;
1869 bed
= get_elf_backend_data (info
->output_bfd
);
1870 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1871 && (sizeof (elf_i386_got_plt_entry
)
1872 == sizeof (elf_i386_pic_got_plt_entry
)));
1875 if (htab
->elf
.dynobj
== NULL
)
1876 htab
->elf
.dynobj
= abfd
;
1878 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1880 (bed
->dynamic_sec_flags
1885 if (htab
->plt_got
== NULL
1886 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1892 if (r_type
== R_386_GOT32
1893 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1894 sec
->need_convert_mov_to_lea
= 1;
1900 /* Return the section that should be marked against GC for a given
1904 elf_i386_gc_mark_hook (asection
*sec
,
1905 struct bfd_link_info
*info
,
1906 Elf_Internal_Rela
*rel
,
1907 struct elf_link_hash_entry
*h
,
1908 Elf_Internal_Sym
*sym
)
1911 switch (ELF32_R_TYPE (rel
->r_info
))
1913 case R_386_GNU_VTINHERIT
:
1914 case R_386_GNU_VTENTRY
:
1918 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1921 /* Update the got entry reference counts for the section being removed. */
1924 elf_i386_gc_sweep_hook (bfd
*abfd
,
1925 struct bfd_link_info
*info
,
1927 const Elf_Internal_Rela
*relocs
)
1929 struct elf_i386_link_hash_table
*htab
;
1930 Elf_Internal_Shdr
*symtab_hdr
;
1931 struct elf_link_hash_entry
**sym_hashes
;
1932 bfd_signed_vma
*local_got_refcounts
;
1933 const Elf_Internal_Rela
*rel
, *relend
;
1935 if (info
->relocatable
)
1938 htab
= elf_i386_hash_table (info
);
1942 elf_section_data (sec
)->local_dynrel
= NULL
;
1944 symtab_hdr
= &elf_symtab_hdr (abfd
);
1945 sym_hashes
= elf_sym_hashes (abfd
);
1946 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1948 relend
= relocs
+ sec
->reloc_count
;
1949 for (rel
= relocs
; rel
< relend
; rel
++)
1951 unsigned long r_symndx
;
1952 unsigned int r_type
;
1953 struct elf_link_hash_entry
*h
= NULL
;
1955 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1956 if (r_symndx
>= symtab_hdr
->sh_info
)
1958 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1959 while (h
->root
.type
== bfd_link_hash_indirect
1960 || h
->root
.type
== bfd_link_hash_warning
)
1961 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1965 /* A local symbol. */
1966 Elf_Internal_Sym
*isym
;
1968 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1971 /* Check relocation against local STT_GNU_IFUNC symbol. */
1973 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1975 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1983 struct elf_i386_link_hash_entry
*eh
;
1984 struct elf_dyn_relocs
**pp
;
1985 struct elf_dyn_relocs
*p
;
1987 eh
= (struct elf_i386_link_hash_entry
*) h
;
1988 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1991 /* Everything must go for SEC. */
1997 r_type
= ELF32_R_TYPE (rel
->r_info
);
1998 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1999 symtab_hdr
, sym_hashes
,
2000 &r_type
, GOT_UNKNOWN
,
2001 rel
, relend
, h
, r_symndx
))
2007 if (htab
->tls_ldm_got
.refcount
> 0)
2008 htab
->tls_ldm_got
.refcount
-= 1;
2012 case R_386_TLS_GOTDESC
:
2013 case R_386_TLS_DESC_CALL
:
2014 case R_386_TLS_IE_32
:
2016 case R_386_TLS_GOTIE
:
2020 if (h
->got
.refcount
> 0)
2021 h
->got
.refcount
-= 1;
2022 if (h
->type
== STT_GNU_IFUNC
)
2024 if (h
->plt
.refcount
> 0)
2025 h
->plt
.refcount
-= 1;
2028 else if (local_got_refcounts
!= NULL
)
2030 if (local_got_refcounts
[r_symndx
] > 0)
2031 local_got_refcounts
[r_symndx
] -= 1;
2039 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2046 if (h
->plt
.refcount
> 0)
2047 h
->plt
.refcount
-= 1;
2052 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2054 if (h
->got
.refcount
> 0)
2055 h
->got
.refcount
-= 1;
2056 if (h
->plt
.refcount
> 0)
2057 h
->plt
.refcount
-= 1;
2069 /* Adjust a symbol defined by a dynamic object and referenced by a
2070 regular object. The current definition is in some section of the
2071 dynamic object, but we're not including those sections. We have to
2072 change the definition to something the rest of the link can
2076 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2077 struct elf_link_hash_entry
*h
)
2079 struct elf_i386_link_hash_table
*htab
;
2081 struct elf_i386_link_hash_entry
*eh
;
2082 struct elf_dyn_relocs
*p
;
2084 /* STT_GNU_IFUNC symbol must go through PLT. */
2085 if (h
->type
== STT_GNU_IFUNC
)
2087 /* All local STT_GNU_IFUNC references must be treate as local
2088 calls via local PLT. */
2090 && SYMBOL_CALLS_LOCAL (info
, h
))
2092 bfd_size_type pc_count
= 0, count
= 0;
2093 struct elf_dyn_relocs
**pp
;
2095 eh
= (struct elf_i386_link_hash_entry
*) h
;
2096 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2098 pc_count
+= p
->pc_count
;
2099 p
->count
-= p
->pc_count
;
2108 if (pc_count
|| count
)
2112 if (h
->plt
.refcount
<= 0)
2113 h
->plt
.refcount
= 1;
2115 h
->plt
.refcount
+= 1;
2119 if (h
->plt
.refcount
<= 0)
2121 h
->plt
.offset
= (bfd_vma
) -1;
2127 /* If this is a function, put it in the procedure linkage table. We
2128 will fill in the contents of the procedure linkage table later,
2129 when we know the address of the .got section. */
2130 if (h
->type
== STT_FUNC
2133 if (h
->plt
.refcount
<= 0
2134 || SYMBOL_CALLS_LOCAL (info
, h
)
2135 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2136 && h
->root
.type
== bfd_link_hash_undefweak
))
2138 /* This case can occur if we saw a PLT32 reloc in an input
2139 file, but the symbol was never referred to by a dynamic
2140 object, or if all references were garbage collected. In
2141 such a case, we don't actually need to build a procedure
2142 linkage table, and we can just do a PC32 reloc instead. */
2143 h
->plt
.offset
= (bfd_vma
) -1;
2150 /* It's possible that we incorrectly decided a .plt reloc was
2151 needed for an R_386_PC32 reloc to a non-function sym in
2152 check_relocs. We can't decide accurately between function and
2153 non-function syms in check-relocs; Objects loaded later in
2154 the link may change h->type. So fix it now. */
2155 h
->plt
.offset
= (bfd_vma
) -1;
2157 /* If this is a weak symbol, and there is a real definition, the
2158 processor independent code will have arranged for us to see the
2159 real definition first, and we can just use the same value. */
2160 if (h
->u
.weakdef
!= NULL
)
2162 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2163 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2164 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2165 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2166 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2167 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2171 /* This is a reference to a symbol defined by a dynamic object which
2172 is not a function. */
2174 /* If we are creating a shared library, we must presume that the
2175 only references to the symbol are via the global offset table.
2176 For such cases we need not do anything here; the relocations will
2177 be handled correctly by relocate_section. */
2181 /* If there are no references to this symbol that do not use the
2182 GOT, we don't need to generate a copy reloc. */
2183 if (!h
->non_got_ref
)
2186 /* If -z nocopyreloc was given, we won't generate them either. */
2187 if (info
->nocopyreloc
)
2193 htab
= elf_i386_hash_table (info
);
2197 /* If there aren't any dynamic relocs in read-only sections, then
2198 we can keep the dynamic relocs and avoid the copy reloc. This
2199 doesn't work on VxWorks, where we can not have dynamic relocations
2200 (other than copy and jump slot relocations) in an executable. */
2201 if (ELIMINATE_COPY_RELOCS
2202 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2204 eh
= (struct elf_i386_link_hash_entry
*) h
;
2205 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2207 s
= p
->sec
->output_section
;
2208 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2219 /* We must allocate the symbol in our .dynbss section, which will
2220 become part of the .bss section of the executable. There will be
2221 an entry for this symbol in the .dynsym section. The dynamic
2222 object will contain position independent code, so all references
2223 from the dynamic object to this symbol will go through the global
2224 offset table. The dynamic linker will use the .dynsym entry to
2225 determine the address it must put in the global offset table, so
2226 both the dynamic object and the regular object will refer to the
2227 same memory location for the variable. */
2229 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2230 copy the initial value out of the dynamic object and into the
2231 runtime process image. */
2232 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2234 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2240 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2243 /* Allocate space in .plt, .got and associated reloc sections for
2247 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2249 struct bfd_link_info
*info
;
2250 struct elf_i386_link_hash_table
*htab
;
2251 struct elf_i386_link_hash_entry
*eh
;
2252 struct elf_dyn_relocs
*p
;
2253 unsigned plt_entry_size
;
2255 if (h
->root
.type
== bfd_link_hash_indirect
)
2258 eh
= (struct elf_i386_link_hash_entry
*) h
;
2260 info
= (struct bfd_link_info
*) inf
;
2261 htab
= elf_i386_hash_table (info
);
2265 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2267 /* We can't use the GOT PLT if pointer equality is needed since
2268 finish_dynamic_symbol won't clear symbol value and the dynamic
2269 linker won't update the GOT slot. We will get into an infinite
2270 loop at run-time. */
2271 if (htab
->plt_got
!= NULL
2272 && h
->type
!= STT_GNU_IFUNC
2273 && !h
->pointer_equality_needed
2274 && h
->plt
.refcount
> 0
2275 && h
->got
.refcount
> 0)
2277 /* Don't use the regular PLT if there are both GOT and GOTPLT
2279 h
->plt
.offset
= (bfd_vma
) -1;
2281 /* Use the GOT PLT. */
2282 eh
->plt_got
.refcount
= 1;
2285 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2286 here if it is defined and referenced in a non-shared object. */
2287 if (h
->type
== STT_GNU_IFUNC
2289 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2292 else if (htab
->elf
.dynamic_sections_created
2293 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2295 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2297 /* Make sure this symbol is output as a dynamic symbol.
2298 Undefined weak syms won't yet be marked as dynamic. */
2299 if (h
->dynindx
== -1
2300 && !h
->forced_local
)
2302 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2307 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2309 asection
*s
= htab
->elf
.splt
;
2310 asection
*got_s
= htab
->plt_got
;
2312 /* If this is the first .plt entry, make room for the special
2315 s
->size
= plt_entry_size
;
2318 eh
->plt_got
.offset
= got_s
->size
;
2320 h
->plt
.offset
= s
->size
;
2322 /* If this symbol is not defined in a regular file, and we are
2323 not generating a shared library, then set the symbol to this
2324 location in the .plt. This is required to make function
2325 pointers compare as equal between the normal executable and
2326 the shared library. */
2332 /* We need to make a call to the entry of the GOT PLT
2333 instead of regular PLT entry. */
2334 h
->root
.u
.def
.section
= got_s
;
2335 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2339 h
->root
.u
.def
.section
= s
;
2340 h
->root
.u
.def
.value
= h
->plt
.offset
;
2344 /* Make room for this entry. */
2346 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2349 s
->size
+= plt_entry_size
;
2351 /* We also need to make an entry in the .got.plt section,
2352 which will be placed in the .got section by the linker
2354 htab
->elf
.sgotplt
->size
+= 4;
2356 /* We also need to make an entry in the .rel.plt section. */
2357 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2358 htab
->elf
.srelplt
->reloc_count
++;
2361 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2364 /* VxWorks has a second set of relocations for each PLT entry
2365 in executables. They go in a separate relocation section,
2366 which is processed by the kernel loader. */
2368 /* There are two relocations for the initial PLT entry: an
2369 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2370 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2372 if (h
->plt
.offset
== plt_entry_size
)
2373 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2375 /* There are two extra relocations for each subsequent PLT entry:
2376 an R_386_32 relocation for the GOT entry, and an R_386_32
2377 relocation for the PLT entry. */
2379 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2384 h
->plt
.offset
= (bfd_vma
) -1;
2390 h
->plt
.offset
= (bfd_vma
) -1;
2394 eh
->tlsdesc_got
= (bfd_vma
) -1;
2396 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2397 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2398 if (h
->got
.refcount
> 0
2401 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2402 h
->got
.offset
= (bfd_vma
) -1;
2403 else if (h
->got
.refcount
> 0)
2407 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2409 /* Make sure this symbol is output as a dynamic symbol.
2410 Undefined weak syms won't yet be marked as dynamic. */
2411 if (h
->dynindx
== -1
2412 && !h
->forced_local
)
2414 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2419 if (GOT_TLS_GDESC_P (tls_type
))
2421 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2422 - elf_i386_compute_jump_table_size (htab
);
2423 htab
->elf
.sgotplt
->size
+= 8;
2424 h
->got
.offset
= (bfd_vma
) -2;
2426 if (! GOT_TLS_GDESC_P (tls_type
)
2427 || GOT_TLS_GD_P (tls_type
))
2429 h
->got
.offset
= s
->size
;
2431 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2432 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2435 dyn
= htab
->elf
.dynamic_sections_created
;
2436 /* R_386_TLS_IE_32 needs one dynamic relocation,
2437 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2438 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2439 need two), R_386_TLS_GD needs one if local symbol and two if
2441 if (tls_type
== GOT_TLS_IE_BOTH
)
2442 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2443 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2444 || (tls_type
& GOT_TLS_IE
))
2445 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2446 else if (GOT_TLS_GD_P (tls_type
))
2447 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2448 else if (! GOT_TLS_GDESC_P (tls_type
)
2449 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2450 || h
->root
.type
!= bfd_link_hash_undefweak
)
2452 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2453 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2454 if (GOT_TLS_GDESC_P (tls_type
))
2455 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2458 h
->got
.offset
= (bfd_vma
) -1;
2460 if (eh
->dyn_relocs
== NULL
)
2463 /* In the shared -Bsymbolic case, discard space allocated for
2464 dynamic pc-relative relocs against symbols which turn out to be
2465 defined in regular objects. For the normal shared case, discard
2466 space for pc-relative relocs that have become local due to symbol
2467 visibility changes. */
2471 /* The only reloc that uses pc_count is R_386_PC32, which will
2472 appear on a call or on something like ".long foo - .". We
2473 want calls to protected symbols to resolve directly to the
2474 function rather than going via the plt. If people want
2475 function pointer comparisons to work as expected then they
2476 should avoid writing assembly like ".long foo - .". */
2477 if (SYMBOL_CALLS_LOCAL (info
, h
))
2479 struct elf_dyn_relocs
**pp
;
2481 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2483 p
->count
-= p
->pc_count
;
2492 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2494 struct elf_dyn_relocs
**pp
;
2495 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2497 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2504 /* Also discard relocs on undefined weak syms with non-default
2506 if (eh
->dyn_relocs
!= NULL
2507 && h
->root
.type
== bfd_link_hash_undefweak
)
2509 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2510 eh
->dyn_relocs
= NULL
;
2512 /* Make sure undefined weak symbols are output as a dynamic
2514 else if (h
->dynindx
== -1
2515 && !h
->forced_local
)
2517 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2522 else if (ELIMINATE_COPY_RELOCS
)
2524 /* For the non-shared case, discard space for relocs against
2525 symbols which turn out to need copy relocs or are not
2531 || (htab
->elf
.dynamic_sections_created
2532 && (h
->root
.type
== bfd_link_hash_undefweak
2533 || h
->root
.type
== bfd_link_hash_undefined
))))
2535 /* Make sure this symbol is output as a dynamic symbol.
2536 Undefined weak syms won't yet be marked as dynamic. */
2537 if (h
->dynindx
== -1
2538 && !h
->forced_local
)
2540 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2544 /* If that succeeded, we know we'll be keeping all the
2546 if (h
->dynindx
!= -1)
2550 eh
->dyn_relocs
= NULL
;
2555 /* Finally, allocate space. */
2556 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2560 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2562 BFD_ASSERT (sreloc
!= NULL
);
2563 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2569 /* Allocate space in .plt, .got and associated reloc sections for
2570 local dynamic relocs. */
2573 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2575 struct elf_link_hash_entry
*h
2576 = (struct elf_link_hash_entry
*) *slot
;
2578 if (h
->type
!= STT_GNU_IFUNC
2582 || h
->root
.type
!= bfd_link_hash_defined
)
2585 return elf_i386_allocate_dynrelocs (h
, inf
);
2588 /* Find any dynamic relocs that apply to read-only sections. */
2591 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2593 struct elf_i386_link_hash_entry
*eh
;
2594 struct elf_dyn_relocs
*p
;
2596 /* Skip local IFUNC symbols. */
2597 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2600 eh
= (struct elf_i386_link_hash_entry
*) h
;
2601 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2603 asection
*s
= p
->sec
->output_section
;
2605 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2607 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2609 info
->flags
|= DF_TEXTREL
;
2611 if ((info
->warn_shared_textrel
&& info
->shared
)
2612 || info
->error_textrel
)
2613 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2614 p
->sec
->owner
, h
->root
.root
.string
,
2617 /* Not an error, just cut short the traversal. */
2625 mov foo@GOT(%reg), %reg
2627 lea foo@GOTOFF(%reg), %reg
2628 with the local symbol, foo. */
2631 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2632 struct bfd_link_info
*link_info
)
2634 Elf_Internal_Shdr
*symtab_hdr
;
2635 Elf_Internal_Rela
*internal_relocs
;
2636 Elf_Internal_Rela
*irel
, *irelend
;
2638 struct elf_i386_link_hash_table
*htab
;
2639 bfd_boolean changed_contents
;
2640 bfd_boolean changed_relocs
;
2641 bfd_signed_vma
*local_got_refcounts
;
2643 /* Don't even try to convert non-ELF outputs. */
2644 if (!is_elf_hash_table (link_info
->hash
))
2647 /* Nothing to do if there is no need or no output. */
2648 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2649 || sec
->need_convert_mov_to_lea
== 0
2650 || bfd_is_abs_section (sec
->output_section
))
2653 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2655 /* Load the relocations for this section. */
2656 internal_relocs
= (_bfd_elf_link_read_relocs
2657 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2658 link_info
->keep_memory
));
2659 if (internal_relocs
== NULL
)
2662 htab
= elf_i386_hash_table (link_info
);
2663 changed_contents
= FALSE
;
2664 changed_relocs
= FALSE
;
2665 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2667 /* Get the section contents. */
2668 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2669 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2672 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2676 irelend
= internal_relocs
+ sec
->reloc_count
;
2677 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2679 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2680 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2682 struct elf_link_hash_entry
*h
;
2684 if (r_type
!= R_386_GOT32
)
2687 /* Get the symbol referred to by the reloc. */
2688 if (r_symndx
< symtab_hdr
->sh_info
)
2690 Elf_Internal_Sym
*isym
;
2692 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2695 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2696 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2697 && irel
->r_offset
>= 2
2698 && bfd_get_8 (input_bfd
,
2699 contents
+ irel
->r_offset
- 2) == 0x8b)
2701 bfd_put_8 (output_bfd
, 0x8d,
2702 contents
+ irel
->r_offset
- 2);
2703 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2704 if (local_got_refcounts
!= NULL
2705 && local_got_refcounts
[r_symndx
] > 0)
2706 local_got_refcounts
[r_symndx
] -= 1;
2707 changed_contents
= TRUE
;
2708 changed_relocs
= TRUE
;
2713 indx
= r_symndx
- symtab_hdr
->sh_info
;
2714 h
= elf_sym_hashes (abfd
)[indx
];
2715 BFD_ASSERT (h
!= NULL
);
2717 while (h
->root
.type
== bfd_link_hash_indirect
2718 || h
->root
.type
== bfd_link_hash_warning
)
2719 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2721 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2722 optimizing _DYNAMIC since ld.so may use its link-time address. */
2724 && h
->type
!= STT_GNU_IFUNC
2725 && h
!= htab
->elf
.hdynamic
2726 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2727 && irel
->r_offset
>= 2
2728 && bfd_get_8 (input_bfd
,
2729 contents
+ irel
->r_offset
- 2) == 0x8b)
2731 bfd_put_8 (output_bfd
, 0x8d,
2732 contents
+ irel
->r_offset
- 2);
2733 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2734 if (h
->got
.refcount
> 0)
2735 h
->got
.refcount
-= 1;
2736 changed_contents
= TRUE
;
2737 changed_relocs
= TRUE
;
2741 if (contents
!= NULL
2742 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2744 if (!changed_contents
&& !link_info
->keep_memory
)
2748 /* Cache the section contents for elf_link_input_bfd. */
2749 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2753 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2755 if (!changed_relocs
)
2756 free (internal_relocs
);
2758 elf_section_data (sec
)->relocs
= internal_relocs
;
2764 if (contents
!= NULL
2765 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2767 if (internal_relocs
!= NULL
2768 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2769 free (internal_relocs
);
2773 /* Set the sizes of the dynamic sections. */
2776 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2778 struct elf_i386_link_hash_table
*htab
;
2784 htab
= elf_i386_hash_table (info
);
2787 dynobj
= htab
->elf
.dynobj
;
2791 if (htab
->elf
.dynamic_sections_created
)
2793 /* Set the contents of the .interp section to the interpreter. */
2794 if (info
->executable
)
2796 s
= bfd_get_linker_section (dynobj
, ".interp");
2799 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2800 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2804 /* Set up .got offsets for local syms, and space for local dynamic
2806 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2808 bfd_signed_vma
*local_got
;
2809 bfd_signed_vma
*end_local_got
;
2810 char *local_tls_type
;
2811 bfd_vma
*local_tlsdesc_gotent
;
2812 bfd_size_type locsymcount
;
2813 Elf_Internal_Shdr
*symtab_hdr
;
2816 if (! is_i386_elf (ibfd
))
2819 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2821 struct elf_dyn_relocs
*p
;
2823 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2826 for (p
= ((struct elf_dyn_relocs
*)
2827 elf_section_data (s
)->local_dynrel
);
2831 if (!bfd_is_abs_section (p
->sec
)
2832 && bfd_is_abs_section (p
->sec
->output_section
))
2834 /* Input section has been discarded, either because
2835 it is a copy of a linkonce section or due to
2836 linker script /DISCARD/, so we'll be discarding
2839 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2840 && strcmp (p
->sec
->output_section
->name
,
2843 /* Relocations in vxworks .tls_vars sections are
2844 handled specially by the loader. */
2846 else if (p
->count
!= 0)
2848 srel
= elf_section_data (p
->sec
)->sreloc
;
2849 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2850 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2851 && (info
->flags
& DF_TEXTREL
) == 0)
2853 info
->flags
|= DF_TEXTREL
;
2854 if ((info
->warn_shared_textrel
&& info
->shared
)
2855 || info
->error_textrel
)
2856 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2857 p
->sec
->owner
, p
->sec
);
2863 local_got
= elf_local_got_refcounts (ibfd
);
2867 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2868 locsymcount
= symtab_hdr
->sh_info
;
2869 end_local_got
= local_got
+ locsymcount
;
2870 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2871 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2873 srel
= htab
->elf
.srelgot
;
2874 for (; local_got
< end_local_got
;
2875 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2877 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2880 if (GOT_TLS_GDESC_P (*local_tls_type
))
2882 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2883 - elf_i386_compute_jump_table_size (htab
);
2884 htab
->elf
.sgotplt
->size
+= 8;
2885 *local_got
= (bfd_vma
) -2;
2887 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2888 || GOT_TLS_GD_P (*local_tls_type
))
2890 *local_got
= s
->size
;
2892 if (GOT_TLS_GD_P (*local_tls_type
)
2893 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2897 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2898 || (*local_tls_type
& GOT_TLS_IE
))
2900 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2901 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2902 else if (GOT_TLS_GD_P (*local_tls_type
)
2903 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2904 srel
->size
+= sizeof (Elf32_External_Rel
);
2905 if (GOT_TLS_GDESC_P (*local_tls_type
))
2906 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2910 *local_got
= (bfd_vma
) -1;
2914 if (htab
->tls_ldm_got
.refcount
> 0)
2916 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2918 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2919 htab
->elf
.sgot
->size
+= 8;
2920 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2923 htab
->tls_ldm_got
.offset
= -1;
2925 /* Allocate global sym .plt and .got entries, and space for global
2926 sym dynamic relocs. */
2927 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2929 /* Allocate .plt and .got entries, and space for local symbols. */
2930 htab_traverse (htab
->loc_hash_table
,
2931 elf_i386_allocate_local_dynrelocs
,
2934 /* For every jump slot reserved in the sgotplt, reloc_count is
2935 incremented. However, when we reserve space for TLS descriptors,
2936 it's not incremented, so in order to compute the space reserved
2937 for them, it suffices to multiply the reloc count by the jump
2940 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2941 so that R_386_IRELATIVE entries come last. */
2942 if (htab
->elf
.srelplt
)
2944 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2945 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2946 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2948 else if (htab
->elf
.irelplt
)
2949 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2952 if (htab
->elf
.sgotplt
)
2954 /* Don't allocate .got.plt section if there are no GOT nor PLT
2955 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2956 if ((htab
->elf
.hgot
== NULL
2957 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2958 && (htab
->elf
.sgotplt
->size
2959 == get_elf_backend_data (output_bfd
)->got_header_size
)
2960 && (htab
->elf
.splt
== NULL
2961 || htab
->elf
.splt
->size
== 0)
2962 && (htab
->elf
.sgot
== NULL
2963 || htab
->elf
.sgot
->size
== 0)
2964 && (htab
->elf
.iplt
== NULL
2965 || htab
->elf
.iplt
->size
== 0)
2966 && (htab
->elf
.igotplt
== NULL
2967 || htab
->elf
.igotplt
->size
== 0))
2968 htab
->elf
.sgotplt
->size
= 0;
2972 if (htab
->plt_eh_frame
!= NULL
2973 && htab
->elf
.splt
!= NULL
2974 && htab
->elf
.splt
->size
!= 0
2975 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2976 && _bfd_elf_eh_frame_present (info
))
2977 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2979 /* We now have determined the sizes of the various dynamic sections.
2980 Allocate memory for them. */
2982 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2984 bfd_boolean strip_section
= TRUE
;
2986 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2989 if (s
== htab
->elf
.splt
2990 || s
== htab
->elf
.sgot
)
2992 /* Strip this section if we don't need it; see the
2994 /* We'd like to strip these sections if they aren't needed, but if
2995 we've exported dynamic symbols from them we must leave them.
2996 It's too late to tell BFD to get rid of the symbols. */
2998 if (htab
->elf
.hplt
!= NULL
)
2999 strip_section
= FALSE
;
3001 else if (s
== htab
->elf
.sgotplt
3002 || s
== htab
->elf
.iplt
3003 || s
== htab
->elf
.igotplt
3004 || s
== htab
->plt_got
3005 || s
== htab
->plt_eh_frame
3006 || s
== htab
->sdynbss
)
3008 /* Strip these too. */
3010 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3013 && s
!= htab
->elf
.srelplt
3014 && s
!= htab
->srelplt2
)
3017 /* We use the reloc_count field as a counter if we need
3018 to copy relocs into the output file. */
3023 /* It's not one of our sections, so don't allocate space. */
3029 /* If we don't need this section, strip it from the
3030 output file. This is mostly to handle .rel.bss and
3031 .rel.plt. We must create both sections in
3032 create_dynamic_sections, because they must be created
3033 before the linker maps input sections to output
3034 sections. The linker does that before
3035 adjust_dynamic_symbol is called, and it is that
3036 function which decides whether anything needs to go
3037 into these sections. */
3039 s
->flags
|= SEC_EXCLUDE
;
3043 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3046 /* Allocate memory for the section contents. We use bfd_zalloc
3047 here in case unused entries are not reclaimed before the
3048 section's contents are written out. This should not happen,
3049 but this way if it does, we get a R_386_NONE reloc instead
3051 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3052 if (s
->contents
== NULL
)
3056 if (htab
->plt_eh_frame
!= NULL
3057 && htab
->plt_eh_frame
->contents
!= NULL
)
3059 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3060 sizeof (elf_i386_eh_frame_plt
));
3061 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3062 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3065 if (htab
->elf
.dynamic_sections_created
)
3067 /* Add some entries to the .dynamic section. We fill in the
3068 values later, in elf_i386_finish_dynamic_sections, but we
3069 must add the entries now so that we get the correct size for
3070 the .dynamic section. The DT_DEBUG entry is filled in by the
3071 dynamic linker and used by the debugger. */
3072 #define add_dynamic_entry(TAG, VAL) \
3073 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3075 if (info
->executable
)
3077 if (!add_dynamic_entry (DT_DEBUG
, 0))
3081 if (htab
->elf
.splt
->size
!= 0)
3083 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3084 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3085 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3086 || !add_dynamic_entry (DT_JMPREL
, 0))
3092 if (!add_dynamic_entry (DT_REL
, 0)
3093 || !add_dynamic_entry (DT_RELSZ
, 0)
3094 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3097 /* If any dynamic relocs apply to a read-only section,
3098 then we need a DT_TEXTREL entry. */
3099 if ((info
->flags
& DF_TEXTREL
) == 0)
3100 elf_link_hash_traverse (&htab
->elf
,
3101 elf_i386_readonly_dynrelocs
, info
);
3103 if ((info
->flags
& DF_TEXTREL
) != 0)
3105 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3109 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3110 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3113 #undef add_dynamic_entry
3119 elf_i386_always_size_sections (bfd
*output_bfd
,
3120 struct bfd_link_info
*info
)
3122 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3126 struct elf_link_hash_entry
*tlsbase
;
3128 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3129 "_TLS_MODULE_BASE_",
3130 FALSE
, FALSE
, FALSE
);
3132 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3134 struct elf_i386_link_hash_table
*htab
;
3135 struct bfd_link_hash_entry
*bh
= NULL
;
3136 const struct elf_backend_data
*bed
3137 = get_elf_backend_data (output_bfd
);
3139 htab
= elf_i386_hash_table (info
);
3143 if (!(_bfd_generic_link_add_one_symbol
3144 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3145 tls_sec
, 0, NULL
, FALSE
,
3146 bed
->collect
, &bh
)))
3149 htab
->tls_module_base
= bh
;
3151 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3152 tlsbase
->def_regular
= 1;
3153 tlsbase
->other
= STV_HIDDEN
;
3154 tlsbase
->root
.linker_def
= 1;
3155 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3162 /* Set the correct type for an x86 ELF section. We do this by the
3163 section name, which is a hack, but ought to work. */
3166 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3167 Elf_Internal_Shdr
*hdr
,
3172 name
= bfd_get_section_name (abfd
, sec
);
3174 /* This is an ugly, but unfortunately necessary hack that is
3175 needed when producing EFI binaries on x86. It tells
3176 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3177 containing ELF relocation info. We need this hack in order to
3178 be able to generate ELF binaries that can be translated into
3179 EFI applications (which are essentially COFF objects). Those
3180 files contain a COFF ".reloc" section inside an ELFNN object,
3181 which would normally cause BFD to segfault because it would
3182 attempt to interpret this section as containing relocation
3183 entries for section "oc". With this hack enabled, ".reloc"
3184 will be treated as a normal data section, which will avoid the
3185 segfault. However, you won't be able to create an ELFNN binary
3186 with a section named "oc" that needs relocations, but that's
3187 the kind of ugly side-effects you get when detecting section
3188 types based on their names... In practice, this limitation is
3189 unlikely to bite. */
3190 if (strcmp (name
, ".reloc") == 0)
3191 hdr
->sh_type
= SHT_PROGBITS
;
3196 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3197 executables. Rather than setting it to the beginning of the TLS
3198 section, we have to set it to the end. This function may be called
3199 multiple times, it is idempotent. */
3202 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3204 struct elf_i386_link_hash_table
*htab
;
3205 struct bfd_link_hash_entry
*base
;
3207 if (!info
->executable
)
3210 htab
= elf_i386_hash_table (info
);
3214 base
= htab
->tls_module_base
;
3218 base
->u
.def
.value
= htab
->elf
.tls_size
;
3221 /* Return the base VMA address which should be subtracted from real addresses
3222 when resolving @dtpoff relocation.
3223 This is PT_TLS segment p_vaddr. */
3226 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3228 /* If tls_sec is NULL, we should have signalled an error already. */
3229 if (elf_hash_table (info
)->tls_sec
== NULL
)
3231 return elf_hash_table (info
)->tls_sec
->vma
;
3234 /* Return the relocation value for @tpoff relocation
3235 if STT_TLS virtual address is ADDRESS. */
3238 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3240 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3241 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3242 bfd_vma static_tls_size
;
3244 /* If tls_sec is NULL, we should have signalled an error already. */
3245 if (htab
->tls_sec
== NULL
)
3248 /* Consider special static TLS alignment requirements. */
3249 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3250 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3253 /* Relocate an i386 ELF section. */
3256 elf_i386_relocate_section (bfd
*output_bfd
,
3257 struct bfd_link_info
*info
,
3259 asection
*input_section
,
3261 Elf_Internal_Rela
*relocs
,
3262 Elf_Internal_Sym
*local_syms
,
3263 asection
**local_sections
)
3265 struct elf_i386_link_hash_table
*htab
;
3266 Elf_Internal_Shdr
*symtab_hdr
;
3267 struct elf_link_hash_entry
**sym_hashes
;
3268 bfd_vma
*local_got_offsets
;
3269 bfd_vma
*local_tlsdesc_gotents
;
3270 Elf_Internal_Rela
*rel
;
3271 Elf_Internal_Rela
*relend
;
3272 bfd_boolean is_vxworks_tls
;
3273 unsigned plt_entry_size
;
3275 BFD_ASSERT (is_i386_elf (input_bfd
));
3277 htab
= elf_i386_hash_table (info
);
3280 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3281 sym_hashes
= elf_sym_hashes (input_bfd
);
3282 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3283 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3284 /* We have to handle relocations in vxworks .tls_vars sections
3285 specially, because the dynamic loader is 'weird'. */
3286 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3288 && !strcmp (input_section
->output_section
->name
,
3291 elf_i386_set_tls_module_base (info
);
3293 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3296 relend
= relocs
+ input_section
->reloc_count
;
3297 for (; rel
< relend
; rel
++)
3299 unsigned int r_type
;
3300 reloc_howto_type
*howto
;
3301 unsigned long r_symndx
;
3302 struct elf_link_hash_entry
*h
;
3303 struct elf_i386_link_hash_entry
*eh
;
3304 Elf_Internal_Sym
*sym
;
3306 bfd_vma off
, offplt
, plt_offset
;
3308 bfd_boolean unresolved_reloc
;
3309 bfd_reloc_status_type r
;
3313 asection
*resolved_plt
;
3315 r_type
= ELF32_R_TYPE (rel
->r_info
);
3316 if (r_type
== R_386_GNU_VTINHERIT
3317 || r_type
== R_386_GNU_VTENTRY
)
3320 if ((indx
= r_type
) >= R_386_standard
3321 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3322 >= R_386_ext
- R_386_standard
)
3323 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3324 >= R_386_irelative
- R_386_ext
))
3326 (*_bfd_error_handler
)
3327 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3328 input_bfd
, input_section
, r_type
);
3329 bfd_set_error (bfd_error_bad_value
);
3332 howto
= elf_howto_table
+ indx
;
3334 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3338 unresolved_reloc
= FALSE
;
3339 if (r_symndx
< symtab_hdr
->sh_info
)
3341 sym
= local_syms
+ r_symndx
;
3342 sec
= local_sections
[r_symndx
];
3343 relocation
= (sec
->output_section
->vma
3344 + sec
->output_offset
3346 st_size
= sym
->st_size
;
3348 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3349 && ((sec
->flags
& SEC_MERGE
) != 0
3350 || (info
->relocatable
3351 && sec
->output_offset
!= 0)))
3354 bfd_byte
*where
= contents
+ rel
->r_offset
;
3356 switch (howto
->size
)
3359 addend
= bfd_get_8 (input_bfd
, where
);
3360 if (howto
->pc_relative
)
3362 addend
= (addend
^ 0x80) - 0x80;
3367 addend
= bfd_get_16 (input_bfd
, where
);
3368 if (howto
->pc_relative
)
3370 addend
= (addend
^ 0x8000) - 0x8000;
3375 addend
= bfd_get_32 (input_bfd
, where
);
3376 if (howto
->pc_relative
)
3378 addend
= (addend
^ 0x80000000) - 0x80000000;
3386 if (info
->relocatable
)
3387 addend
+= sec
->output_offset
;
3390 asection
*msec
= sec
;
3391 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3393 addend
-= relocation
;
3394 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3397 switch (howto
->size
)
3400 /* FIXME: overflow checks. */
3401 if (howto
->pc_relative
)
3403 bfd_put_8 (input_bfd
, addend
, where
);
3406 if (howto
->pc_relative
)
3408 bfd_put_16 (input_bfd
, addend
, where
);
3411 if (howto
->pc_relative
)
3413 bfd_put_32 (input_bfd
, addend
, where
);
3417 else if (!info
->relocatable
3418 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3420 /* Relocate against local STT_GNU_IFUNC symbol. */
3421 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3426 /* Set STT_GNU_IFUNC symbol value. */
3427 h
->root
.u
.def
.value
= sym
->st_value
;
3428 h
->root
.u
.def
.section
= sec
;
3433 bfd_boolean warned ATTRIBUTE_UNUSED
;
3434 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3436 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3437 r_symndx
, symtab_hdr
, sym_hashes
,
3439 unresolved_reloc
, warned
, ignored
);
3443 if (sec
!= NULL
&& discarded_section (sec
))
3444 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3445 rel
, 1, relend
, howto
, 0, contents
);
3447 if (info
->relocatable
)
3450 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3451 it here if it is defined in a non-shared object. */
3453 && h
->type
== STT_GNU_IFUNC
3456 asection
*plt
, *gotplt
, *base_got
;
3460 if ((input_section
->flags
& SEC_ALLOC
) == 0
3461 || h
->plt
.offset
== (bfd_vma
) -1)
3464 /* STT_GNU_IFUNC symbol must go through PLT. */
3465 if (htab
->elf
.splt
!= NULL
)
3467 plt
= htab
->elf
.splt
;
3468 gotplt
= htab
->elf
.sgotplt
;
3472 plt
= htab
->elf
.iplt
;
3473 gotplt
= htab
->elf
.igotplt
;
3476 relocation
= (plt
->output_section
->vma
3477 + plt
->output_offset
+ h
->plt
.offset
);
3482 if (h
->root
.root
.string
)
3483 name
= h
->root
.root
.string
;
3485 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3487 (*_bfd_error_handler
)
3488 (_("%B: relocation %s against STT_GNU_IFUNC "
3489 "symbol `%s' isn't handled by %s"), input_bfd
,
3490 elf_howto_table
[r_type
].name
,
3491 name
, __FUNCTION__
);
3492 bfd_set_error (bfd_error_bad_value
);
3496 /* Generate dynamic relcoation only when there is a
3497 non-GOT reference in a shared object. */
3498 if (info
->shared
&& h
->non_got_ref
)
3500 Elf_Internal_Rela outrel
;
3504 /* Need a dynamic relocation to get the real function
3506 offset
= _bfd_elf_section_offset (output_bfd
,
3510 if (offset
== (bfd_vma
) -1
3511 || offset
== (bfd_vma
) -2)
3514 outrel
.r_offset
= (input_section
->output_section
->vma
3515 + input_section
->output_offset
3518 if (h
->dynindx
== -1
3520 || info
->executable
)
3522 /* This symbol is resolved locally. */
3523 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3524 bfd_put_32 (output_bfd
,
3525 (h
->root
.u
.def
.value
3526 + h
->root
.u
.def
.section
->output_section
->vma
3527 + h
->root
.u
.def
.section
->output_offset
),
3531 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3533 sreloc
= htab
->elf
.irelifunc
;
3534 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3536 /* If this reloc is against an external symbol, we
3537 do not want to fiddle with the addend. Otherwise,
3538 we need to include the symbol value so that it
3539 becomes an addend for the dynamic reloc. For an
3540 internal symbol, we have updated addend. */
3549 base_got
= htab
->elf
.sgot
;
3550 off
= h
->got
.offset
;
3552 if (base_got
== NULL
)
3555 if (off
== (bfd_vma
) -1)
3557 /* We can't use h->got.offset here to save state, or
3558 even just remember the offset, as finish_dynamic_symbol
3559 would use that as offset into .got. */
3561 if (htab
->elf
.splt
!= NULL
)
3563 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3564 off
= (plt_index
+ 3) * 4;
3565 base_got
= htab
->elf
.sgotplt
;
3569 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3570 off
= plt_index
* 4;
3571 base_got
= htab
->elf
.igotplt
;
3574 if (h
->dynindx
== -1
3578 /* This references the local defitionion. We must
3579 initialize this entry in the global offset table.
3580 Since the offset must always be a multiple of 8,
3581 we use the least significant bit to record
3582 whether we have initialized it already.
3584 When doing a dynamic link, we create a .rela.got
3585 relocation entry to initialize the value. This
3586 is done in the finish_dynamic_symbol routine. */
3591 bfd_put_32 (output_bfd
, relocation
,
3592 base_got
->contents
+ off
);
3599 /* Adjust for static executables. */
3600 if (htab
->elf
.splt
== NULL
)
3601 relocation
+= gotplt
->output_offset
;
3605 relocation
= (base_got
->output_section
->vma
3606 + base_got
->output_offset
+ off
3607 - gotplt
->output_section
->vma
3608 - gotplt
->output_offset
);
3609 /* Adjust for static executables. */
3610 if (htab
->elf
.splt
== NULL
)
3611 relocation
+= gotplt
->output_offset
;
3617 relocation
-= (gotplt
->output_section
->vma
3618 + gotplt
->output_offset
);
3626 /* Relocation is to the entry for this symbol in the global
3628 if (htab
->elf
.sgot
== NULL
)
3635 off
= h
->got
.offset
;
3636 dyn
= htab
->elf
.dynamic_sections_created
;
3637 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3639 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3640 || (ELF_ST_VISIBILITY (h
->other
)
3641 && h
->root
.type
== bfd_link_hash_undefweak
))
3643 /* This is actually a static link, or it is a
3644 -Bsymbolic link and the symbol is defined
3645 locally, or the symbol was forced to be local
3646 because of a version file. We must initialize
3647 this entry in the global offset table. Since the
3648 offset must always be a multiple of 4, we use the
3649 least significant bit to record whether we have
3650 initialized it already.
3652 When doing a dynamic link, we create a .rel.got
3653 relocation entry to initialize the value. This
3654 is done in the finish_dynamic_symbol routine. */
3659 bfd_put_32 (output_bfd
, relocation
,
3660 htab
->elf
.sgot
->contents
+ off
);
3665 unresolved_reloc
= FALSE
;
3669 if (local_got_offsets
== NULL
)
3672 off
= local_got_offsets
[r_symndx
];
3674 /* The offset must always be a multiple of 4. We use
3675 the least significant bit to record whether we have
3676 already generated the necessary reloc. */
3681 bfd_put_32 (output_bfd
, relocation
,
3682 htab
->elf
.sgot
->contents
+ off
);
3687 Elf_Internal_Rela outrel
;
3689 s
= htab
->elf
.srelgot
;
3693 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3694 + htab
->elf
.sgot
->output_offset
3696 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3697 elf_append_rel (output_bfd
, s
, &outrel
);
3700 local_got_offsets
[r_symndx
] |= 1;
3704 if (off
>= (bfd_vma
) -2)
3707 relocation
= htab
->elf
.sgot
->output_section
->vma
3708 + htab
->elf
.sgot
->output_offset
+ off
3709 - htab
->elf
.sgotplt
->output_section
->vma
3710 - htab
->elf
.sgotplt
->output_offset
;
3714 /* Relocation is relative to the start of the global offset
3717 /* Check to make sure it isn't a protected function symbol
3718 for shared library since it may not be local when used
3719 as function address. We also need to make sure that a
3720 symbol is defined locally. */
3721 if (info
->shared
&& h
)
3723 if (!h
->def_regular
)
3727 switch (ELF_ST_VISIBILITY (h
->other
))
3730 v
= _("hidden symbol");
3733 v
= _("internal symbol");
3736 v
= _("protected symbol");
3743 (*_bfd_error_handler
)
3744 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3745 input_bfd
, v
, h
->root
.root
.string
);
3746 bfd_set_error (bfd_error_bad_value
);
3749 else if (!info
->executable
3750 && !SYMBOLIC_BIND (info
, h
)
3751 && h
->type
== STT_FUNC
3752 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3754 (*_bfd_error_handler
)
3755 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3756 input_bfd
, h
->root
.root
.string
);
3757 bfd_set_error (bfd_error_bad_value
);
3762 /* Note that sgot is not involved in this
3763 calculation. We always want the start of .got.plt. If we
3764 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3765 permitted by the ABI, we might have to change this
3767 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3768 + htab
->elf
.sgotplt
->output_offset
;
3772 /* Use global offset table as symbol value. */
3773 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3774 + htab
->elf
.sgotplt
->output_offset
;
3775 unresolved_reloc
= FALSE
;
3779 /* Relocation is to the entry for this symbol in the
3780 procedure linkage table. */
3782 /* Resolve a PLT32 reloc against a local symbol directly,
3783 without using the procedure linkage table. */
3787 eh
= (struct elf_i386_link_hash_entry
*) h
;
3788 if ((h
->plt
.offset
== (bfd_vma
) -1
3789 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3790 || htab
->elf
.splt
== NULL
)
3792 /* We didn't make a PLT entry for this symbol. This
3793 happens when statically linking PIC code, or when
3794 using -Bsymbolic. */
3798 if (h
->plt
.offset
!= (bfd_vma
) -1)
3800 resolved_plt
= htab
->elf
.splt
;
3801 plt_offset
= h
->plt
.offset
;
3805 resolved_plt
= htab
->plt_got
;
3806 plt_offset
= eh
->plt_got
.offset
;
3809 relocation
= (resolved_plt
->output_section
->vma
3810 + resolved_plt
->output_offset
3812 unresolved_reloc
= FALSE
;
3816 /* Set to symbol size. */
3817 relocation
= st_size
;
3822 if ((input_section
->flags
& SEC_ALLOC
) == 0
3828 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3829 || h
->root
.type
!= bfd_link_hash_undefweak
)
3830 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3831 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3832 || (ELIMINATE_COPY_RELOCS
3839 || h
->root
.type
== bfd_link_hash_undefweak
3840 || h
->root
.type
== bfd_link_hash_undefined
)))
3842 Elf_Internal_Rela outrel
;
3843 bfd_boolean skip
, relocate
;
3846 /* When generating a shared object, these relocations
3847 are copied into the output file to be resolved at run
3854 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3856 if (outrel
.r_offset
== (bfd_vma
) -1)
3858 else if (outrel
.r_offset
== (bfd_vma
) -2)
3859 skip
= TRUE
, relocate
= TRUE
;
3860 outrel
.r_offset
+= (input_section
->output_section
->vma
3861 + input_section
->output_offset
);
3864 memset (&outrel
, 0, sizeof outrel
);
3867 && (r_type
== R_386_PC32
3869 || !SYMBOLIC_BIND (info
, h
)
3870 || !h
->def_regular
))
3871 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3874 /* This symbol is local, or marked to become local. */
3876 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3879 sreloc
= elf_section_data (input_section
)->sreloc
;
3881 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3883 r
= bfd_reloc_notsupported
;
3884 goto check_relocation_error
;
3887 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3889 /* If this reloc is against an external symbol, we do
3890 not want to fiddle with the addend. Otherwise, we
3891 need to include the symbol value so that it becomes
3892 an addend for the dynamic reloc. */
3899 if (!info
->executable
)
3901 Elf_Internal_Rela outrel
;
3904 outrel
.r_offset
= rel
->r_offset
3905 + input_section
->output_section
->vma
3906 + input_section
->output_offset
;
3907 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3908 sreloc
= elf_section_data (input_section
)->sreloc
;
3911 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3916 case R_386_TLS_GOTDESC
:
3917 case R_386_TLS_DESC_CALL
:
3918 case R_386_TLS_IE_32
:
3919 case R_386_TLS_GOTIE
:
3920 tls_type
= GOT_UNKNOWN
;
3921 if (h
== NULL
&& local_got_offsets
)
3922 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3924 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3925 if (tls_type
== GOT_TLS_IE
)
3926 tls_type
= GOT_TLS_IE_NEG
;
3928 if (! elf_i386_tls_transition (info
, input_bfd
,
3929 input_section
, contents
,
3930 symtab_hdr
, sym_hashes
,
3931 &r_type
, tls_type
, rel
,
3932 relend
, h
, r_symndx
))
3935 if (r_type
== R_386_TLS_LE_32
)
3937 BFD_ASSERT (! unresolved_reloc
);
3938 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3943 /* GD->LE transition. */
3944 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3947 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3949 movl %gs:0, %eax; subl $foo@tpoff, %eax
3950 (6 byte form of subl). */
3951 memcpy (contents
+ rel
->r_offset
- 3,
3952 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3953 roff
= rel
->r_offset
+ 5;
3957 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3959 movl %gs:0, %eax; subl $foo@tpoff, %eax
3960 (6 byte form of subl). */
3961 memcpy (contents
+ rel
->r_offset
- 2,
3962 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3963 roff
= rel
->r_offset
+ 6;
3965 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3967 /* Skip R_386_PC32/R_386_PLT32. */
3971 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3973 /* GDesc -> LE transition.
3974 It's originally something like:
3975 leal x@tlsdesc(%ebx), %eax
3979 Registers other than %eax may be set up here. */
3984 roff
= rel
->r_offset
;
3985 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3987 /* Now modify the instruction as appropriate. */
3988 /* aoliva FIXME: remove the above and xor the byte
3990 bfd_put_8 (output_bfd
, val
^ 0x86,
3991 contents
+ roff
- 1);
3992 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3996 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3998 /* GDesc -> LE transition.
4006 roff
= rel
->r_offset
;
4007 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4008 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4011 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4015 /* IE->LE transition:
4016 Originally it can be one of:
4024 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4027 /* movl foo, %eax. */
4028 bfd_put_8 (output_bfd
, 0xb8,
4029 contents
+ rel
->r_offset
- 1);
4035 type
= bfd_get_8 (input_bfd
,
4036 contents
+ rel
->r_offset
- 2);
4041 bfd_put_8 (output_bfd
, 0xc7,
4042 contents
+ rel
->r_offset
- 2);
4043 bfd_put_8 (output_bfd
,
4044 0xc0 | ((val
>> 3) & 7),
4045 contents
+ rel
->r_offset
- 1);
4049 bfd_put_8 (output_bfd
, 0x81,
4050 contents
+ rel
->r_offset
- 2);
4051 bfd_put_8 (output_bfd
,
4052 0xc0 | ((val
>> 3) & 7),
4053 contents
+ rel
->r_offset
- 1);
4060 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4061 contents
+ rel
->r_offset
);
4066 unsigned int val
, type
;
4068 /* {IE_32,GOTIE}->LE transition:
4069 Originally it can be one of:
4070 subl foo(%reg1), %reg2
4071 movl foo(%reg1), %reg2
4072 addl foo(%reg1), %reg2
4075 movl $foo, %reg2 (6 byte form)
4076 addl $foo, %reg2. */
4077 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4078 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4082 bfd_put_8 (output_bfd
, 0xc7,
4083 contents
+ rel
->r_offset
- 2);
4084 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4085 contents
+ rel
->r_offset
- 1);
4087 else if (type
== 0x2b)
4090 bfd_put_8 (output_bfd
, 0x81,
4091 contents
+ rel
->r_offset
- 2);
4092 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4093 contents
+ rel
->r_offset
- 1);
4095 else if (type
== 0x03)
4098 bfd_put_8 (output_bfd
, 0x81,
4099 contents
+ rel
->r_offset
- 2);
4100 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4101 contents
+ rel
->r_offset
- 1);
4105 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4106 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4107 contents
+ rel
->r_offset
);
4109 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4110 contents
+ rel
->r_offset
);
4115 if (htab
->elf
.sgot
== NULL
)
4120 off
= h
->got
.offset
;
4121 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4125 if (local_got_offsets
== NULL
)
4128 off
= local_got_offsets
[r_symndx
];
4129 offplt
= local_tlsdesc_gotents
[r_symndx
];
4136 Elf_Internal_Rela outrel
;
4140 if (htab
->elf
.srelgot
== NULL
)
4143 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4145 if (GOT_TLS_GDESC_P (tls_type
))
4148 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4149 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4150 <= htab
->elf
.sgotplt
->size
);
4151 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4152 + htab
->elf
.sgotplt
->output_offset
4154 + htab
->sgotplt_jump_table_size
);
4155 sreloc
= htab
->elf
.srelplt
;
4156 loc
= sreloc
->contents
;
4157 loc
+= (htab
->next_tls_desc_index
++
4158 * sizeof (Elf32_External_Rel
));
4159 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4160 <= sreloc
->contents
+ sreloc
->size
);
4161 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4164 BFD_ASSERT (! unresolved_reloc
);
4165 bfd_put_32 (output_bfd
,
4166 relocation
- elf_i386_dtpoff_base (info
),
4167 htab
->elf
.sgotplt
->contents
+ offplt
4168 + htab
->sgotplt_jump_table_size
+ 4);
4172 bfd_put_32 (output_bfd
, 0,
4173 htab
->elf
.sgotplt
->contents
+ offplt
4174 + htab
->sgotplt_jump_table_size
+ 4);
4178 sreloc
= htab
->elf
.srelgot
;
4180 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4181 + htab
->elf
.sgot
->output_offset
+ off
);
4183 if (GOT_TLS_GD_P (tls_type
))
4184 dr_type
= R_386_TLS_DTPMOD32
;
4185 else if (GOT_TLS_GDESC_P (tls_type
))
4187 else if (tls_type
== GOT_TLS_IE_POS
)
4188 dr_type
= R_386_TLS_TPOFF
;
4190 dr_type
= R_386_TLS_TPOFF32
;
4192 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4193 bfd_put_32 (output_bfd
,
4194 relocation
- elf_i386_dtpoff_base (info
),
4195 htab
->elf
.sgot
->contents
+ off
);
4196 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4197 bfd_put_32 (output_bfd
,
4198 elf_i386_dtpoff_base (info
) - relocation
,
4199 htab
->elf
.sgot
->contents
+ off
);
4200 else if (dr_type
!= R_386_TLS_DESC
)
4201 bfd_put_32 (output_bfd
, 0,
4202 htab
->elf
.sgot
->contents
+ off
);
4203 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4205 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4207 if (GOT_TLS_GD_P (tls_type
))
4211 BFD_ASSERT (! unresolved_reloc
);
4212 bfd_put_32 (output_bfd
,
4213 relocation
- elf_i386_dtpoff_base (info
),
4214 htab
->elf
.sgot
->contents
+ off
+ 4);
4218 bfd_put_32 (output_bfd
, 0,
4219 htab
->elf
.sgot
->contents
+ off
+ 4);
4220 outrel
.r_info
= ELF32_R_INFO (indx
,
4221 R_386_TLS_DTPOFF32
);
4222 outrel
.r_offset
+= 4;
4223 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4226 else if (tls_type
== GOT_TLS_IE_BOTH
)
4228 bfd_put_32 (output_bfd
,
4230 ? relocation
- elf_i386_dtpoff_base (info
)
4232 htab
->elf
.sgot
->contents
+ off
+ 4);
4233 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4234 outrel
.r_offset
+= 4;
4235 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4242 local_got_offsets
[r_symndx
] |= 1;
4245 if (off
>= (bfd_vma
) -2
4246 && ! GOT_TLS_GDESC_P (tls_type
))
4248 if (r_type
== R_386_TLS_GOTDESC
4249 || r_type
== R_386_TLS_DESC_CALL
)
4251 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4252 unresolved_reloc
= FALSE
;
4254 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4256 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4257 + htab
->elf
.sgotplt
->output_offset
;
4258 relocation
= htab
->elf
.sgot
->output_section
->vma
4259 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4260 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4261 && tls_type
== GOT_TLS_IE_BOTH
)
4263 if (r_type
== R_386_TLS_IE
)
4264 relocation
+= g_o_t
;
4265 unresolved_reloc
= FALSE
;
4267 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4269 unsigned int val
, type
;
4272 /* GD->IE transition. */
4273 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4274 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4277 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4279 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4281 roff
= rel
->r_offset
- 3;
4285 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4287 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4288 roff
= rel
->r_offset
- 2;
4290 memcpy (contents
+ roff
,
4291 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4292 contents
[roff
+ 7] = 0x80 | (val
& 7);
4293 /* If foo is used only with foo@gotntpoff(%reg) and
4294 foo@indntpoff, but not with foo@gottpoff(%reg), change
4295 subl $foo@gottpoff(%reg), %eax
4297 addl $foo@gotntpoff(%reg), %eax. */
4298 if (tls_type
== GOT_TLS_IE_POS
)
4299 contents
[roff
+ 6] = 0x03;
4300 bfd_put_32 (output_bfd
,
4301 htab
->elf
.sgot
->output_section
->vma
4302 + htab
->elf
.sgot
->output_offset
+ off
4303 - htab
->elf
.sgotplt
->output_section
->vma
4304 - htab
->elf
.sgotplt
->output_offset
,
4305 contents
+ roff
+ 8);
4306 /* Skip R_386_PLT32. */
4310 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4312 /* GDesc -> IE transition.
4313 It's originally something like:
4314 leal x@tlsdesc(%ebx), %eax
4317 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4319 movl x@gottpoff(%ebx), %eax # before negl %eax
4321 Registers other than %eax may be set up here. */
4325 /* First, make sure it's a leal adding ebx to a 32-bit
4326 offset into any register, although it's probably
4327 almost always going to be eax. */
4328 roff
= rel
->r_offset
;
4330 /* Now modify the instruction as appropriate. */
4331 /* To turn a leal into a movl in the form we use it, it
4332 suffices to change the first byte from 0x8d to 0x8b.
4333 aoliva FIXME: should we decide to keep the leal, all
4334 we have to do is remove the statement below, and
4335 adjust the relaxation of R_386_TLS_DESC_CALL. */
4336 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4338 if (tls_type
== GOT_TLS_IE_BOTH
)
4341 bfd_put_32 (output_bfd
,
4342 htab
->elf
.sgot
->output_section
->vma
4343 + htab
->elf
.sgot
->output_offset
+ off
4344 - htab
->elf
.sgotplt
->output_section
->vma
4345 - htab
->elf
.sgotplt
->output_offset
,
4349 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4351 /* GDesc -> IE transition.
4359 depending on how we transformed the TLS_GOTDESC above.
4364 roff
= rel
->r_offset
;
4366 /* Now modify the instruction as appropriate. */
4367 if (tls_type
!= GOT_TLS_IE_NEG
)
4370 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4371 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4376 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4377 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4387 if (! elf_i386_tls_transition (info
, input_bfd
,
4388 input_section
, contents
,
4389 symtab_hdr
, sym_hashes
,
4390 &r_type
, GOT_UNKNOWN
, rel
,
4391 relend
, h
, r_symndx
))
4394 if (r_type
!= R_386_TLS_LDM
)
4396 /* LD->LE transition:
4397 leal foo(%reg), %eax; call ___tls_get_addr.
4399 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4400 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4401 memcpy (contents
+ rel
->r_offset
- 2,
4402 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4403 /* Skip R_386_PC32/R_386_PLT32. */
4408 if (htab
->elf
.sgot
== NULL
)
4411 off
= htab
->tls_ldm_got
.offset
;
4416 Elf_Internal_Rela outrel
;
4418 if (htab
->elf
.srelgot
== NULL
)
4421 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4422 + htab
->elf
.sgot
->output_offset
+ off
);
4424 bfd_put_32 (output_bfd
, 0,
4425 htab
->elf
.sgot
->contents
+ off
);
4426 bfd_put_32 (output_bfd
, 0,
4427 htab
->elf
.sgot
->contents
+ off
+ 4);
4428 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4429 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4430 htab
->tls_ldm_got
.offset
|= 1;
4432 relocation
= htab
->elf
.sgot
->output_section
->vma
4433 + htab
->elf
.sgot
->output_offset
+ off
4434 - htab
->elf
.sgotplt
->output_section
->vma
4435 - htab
->elf
.sgotplt
->output_offset
;
4436 unresolved_reloc
= FALSE
;
4439 case R_386_TLS_LDO_32
:
4440 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4441 relocation
-= elf_i386_dtpoff_base (info
);
4443 /* When converting LDO to LE, we must negate. */
4444 relocation
= -elf_i386_tpoff (info
, relocation
);
4447 case R_386_TLS_LE_32
:
4449 if (!info
->executable
)
4451 Elf_Internal_Rela outrel
;
4454 outrel
.r_offset
= rel
->r_offset
4455 + input_section
->output_section
->vma
4456 + input_section
->output_offset
;
4457 if (h
!= NULL
&& h
->dynindx
!= -1)
4461 if (r_type
== R_386_TLS_LE_32
)
4462 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4464 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4465 sreloc
= elf_section_data (input_section
)->sreloc
;
4468 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4471 else if (r_type
== R_386_TLS_LE_32
)
4472 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4474 relocation
-= elf_i386_dtpoff_base (info
);
4476 else if (r_type
== R_386_TLS_LE_32
)
4477 relocation
= elf_i386_tpoff (info
, relocation
);
4479 relocation
= -elf_i386_tpoff (info
, relocation
);
4486 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4487 because such sections are not SEC_ALLOC and thus ld.so will
4488 not process them. */
4489 if (unresolved_reloc
4490 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4492 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4493 rel
->r_offset
) != (bfd_vma
) -1)
4495 (*_bfd_error_handler
)
4496 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4499 (long) rel
->r_offset
,
4501 h
->root
.root
.string
);
4506 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4507 contents
, rel
->r_offset
,
4510 check_relocation_error
:
4511 if (r
!= bfd_reloc_ok
)
4516 name
= h
->root
.root
.string
;
4519 name
= bfd_elf_string_from_elf_section (input_bfd
,
4520 symtab_hdr
->sh_link
,
4525 name
= bfd_section_name (input_bfd
, sec
);
4528 if (r
== bfd_reloc_overflow
)
4530 if (! ((*info
->callbacks
->reloc_overflow
)
4531 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4532 (bfd_vma
) 0, input_bfd
, input_section
,
4538 (*_bfd_error_handler
)
4539 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4540 input_bfd
, input_section
,
4541 (long) rel
->r_offset
, name
, (int) r
);
4550 /* Finish up dynamic symbol handling. We set the contents of various
4551 dynamic sections here. */
4554 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4555 struct bfd_link_info
*info
,
4556 struct elf_link_hash_entry
*h
,
4557 Elf_Internal_Sym
*sym
)
4559 struct elf_i386_link_hash_table
*htab
;
4560 unsigned plt_entry_size
;
4561 const struct elf_i386_backend_data
*abed
;
4562 struct elf_i386_link_hash_entry
*eh
;
4564 htab
= elf_i386_hash_table (info
);
4568 abed
= get_elf_i386_backend_data (output_bfd
);
4569 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4571 eh
= (struct elf_i386_link_hash_entry
*) h
;
4573 if (h
->plt
.offset
!= (bfd_vma
) -1)
4577 Elf_Internal_Rela rel
;
4579 asection
*plt
, *gotplt
, *relplt
;
4581 /* When building a static executable, use .iplt, .igot.plt and
4582 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4583 if (htab
->elf
.splt
!= NULL
)
4585 plt
= htab
->elf
.splt
;
4586 gotplt
= htab
->elf
.sgotplt
;
4587 relplt
= htab
->elf
.srelplt
;
4591 plt
= htab
->elf
.iplt
;
4592 gotplt
= htab
->elf
.igotplt
;
4593 relplt
= htab
->elf
.irelplt
;
4596 /* This symbol has an entry in the procedure linkage table. Set
4599 if ((h
->dynindx
== -1
4600 && !((h
->forced_local
|| info
->executable
)
4602 && h
->type
== STT_GNU_IFUNC
))
4608 /* Get the index in the procedure linkage table which
4609 corresponds to this symbol. This is the index of this symbol
4610 in all the symbols for which we are making plt entries. The
4611 first entry in the procedure linkage table is reserved.
4613 Get the offset into the .got table of the entry that
4614 corresponds to this function. Each .got entry is 4 bytes.
4615 The first three are reserved.
4617 For static executables, we don't reserve anything. */
4619 if (plt
== htab
->elf
.splt
)
4621 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4622 got_offset
= (got_offset
+ 3) * 4;
4626 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4627 got_offset
= got_offset
* 4;
4630 /* Fill in the entry in the procedure linkage table. */
4633 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4634 abed
->plt
->plt_entry_size
);
4635 bfd_put_32 (output_bfd
,
4636 (gotplt
->output_section
->vma
4637 + gotplt
->output_offset
4639 plt
->contents
+ h
->plt
.offset
4640 + abed
->plt
->plt_got_offset
);
4642 if (abed
->is_vxworks
)
4644 int s
, k
, reloc_index
;
4646 /* Create the R_386_32 relocation referencing the GOT
4647 for this PLT entry. */
4649 /* S: Current slot number (zero-based). */
4650 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4651 / abed
->plt
->plt_entry_size
);
4652 /* K: Number of relocations for PLTResolve. */
4654 k
= PLTRESOLVE_RELOCS_SHLIB
;
4656 k
= PLTRESOLVE_RELOCS
;
4657 /* Skip the PLTresolve relocations, and the relocations for
4658 the other PLT slots. */
4659 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4660 loc
= (htab
->srelplt2
->contents
+ reloc_index
4661 * sizeof (Elf32_External_Rel
));
4663 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4664 + htab
->elf
.splt
->output_offset
4665 + h
->plt
.offset
+ 2),
4666 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4667 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4669 /* Create the R_386_32 relocation referencing the beginning of
4670 the PLT for this GOT entry. */
4671 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4672 + htab
->elf
.sgotplt
->output_offset
4674 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4675 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4676 loc
+ sizeof (Elf32_External_Rel
));
4681 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4682 abed
->plt
->plt_entry_size
);
4683 bfd_put_32 (output_bfd
, got_offset
,
4684 plt
->contents
+ h
->plt
.offset
4685 + abed
->plt
->plt_got_offset
);
4688 /* Fill in the entry in the global offset table. */
4689 bfd_put_32 (output_bfd
,
4690 (plt
->output_section
->vma
4691 + plt
->output_offset
4693 + abed
->plt
->plt_lazy_offset
),
4694 gotplt
->contents
+ got_offset
);
4696 /* Fill in the entry in the .rel.plt section. */
4697 rel
.r_offset
= (gotplt
->output_section
->vma
4698 + gotplt
->output_offset
4700 if (h
->dynindx
== -1
4701 || ((info
->executable
4702 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4704 && h
->type
== STT_GNU_IFUNC
))
4706 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4707 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4708 in the .got.plt section. */
4709 bfd_put_32 (output_bfd
,
4710 (h
->root
.u
.def
.value
4711 + h
->root
.u
.def
.section
->output_section
->vma
4712 + h
->root
.u
.def
.section
->output_offset
),
4713 gotplt
->contents
+ got_offset
);
4714 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4715 /* R_386_IRELATIVE comes last. */
4716 plt_index
= htab
->next_irelative_index
--;
4720 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4721 plt_index
= htab
->next_jump_slot_index
++;
4723 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4724 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4726 /* Don't fill PLT entry for static executables. */
4727 if (plt
== htab
->elf
.splt
)
4729 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4730 plt
->contents
+ h
->plt
.offset
4731 + abed
->plt
->plt_reloc_offset
);
4732 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4733 + abed
->plt
->plt_plt_offset
+ 4),
4734 plt
->contents
+ h
->plt
.offset
4735 + abed
->plt
->plt_plt_offset
);
4738 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4740 bfd_vma got_offset
, plt_offset
;
4741 asection
*plt
, *got
, *gotplt
;
4742 const bfd_byte
*got_plt_entry
;
4744 /* Offset of displacement of the indirect jump. */
4745 bfd_vma plt_got_offset
= 2;
4747 /* Set the entry in the GOT procedure linkage table. */
4748 plt
= htab
->plt_got
;
4749 got
= htab
->elf
.sgot
;
4750 gotplt
= htab
->elf
.sgotplt
;
4751 got_offset
= h
->got
.offset
;
4753 if (got_offset
== (bfd_vma
) -1
4759 /* Fill in the entry in the GOT procedure linkage table. */
4762 got_plt_entry
= elf_i386_got_plt_entry
;
4763 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4767 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4768 got_offset
+= (got
->output_section
->vma
4769 + got
->output_offset
4770 - gotplt
->output_section
->vma
4771 - gotplt
->output_offset
);
4774 plt_offset
= eh
->plt_got
.offset
;
4775 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4776 sizeof (elf_i386_got_plt_entry
));
4777 bfd_put_32 (output_bfd
, got_offset
,
4778 plt
->contents
+ plt_offset
+ plt_got_offset
);
4782 && (h
->plt
.offset
!= (bfd_vma
) -1
4783 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4785 /* Mark the symbol as undefined, rather than as defined in
4786 the .plt section. Leave the value if there were any
4787 relocations where pointer equality matters (this is a clue
4788 for the dynamic linker, to make function pointer
4789 comparisons work between an application and shared
4790 library), otherwise set it to zero. If a function is only
4791 called from a binary, there is no need to slow down
4792 shared libraries because of that. */
4793 sym
->st_shndx
= SHN_UNDEF
;
4794 if (!h
->pointer_equality_needed
)
4798 if (h
->got
.offset
!= (bfd_vma
) -1
4799 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4800 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4802 Elf_Internal_Rela rel
;
4804 /* This symbol has an entry in the global offset table. Set it
4807 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4810 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4811 + htab
->elf
.sgot
->output_offset
4812 + (h
->got
.offset
& ~(bfd_vma
) 1));
4814 /* If this is a static link, or it is a -Bsymbolic link and the
4815 symbol is defined locally or was forced to be local because
4816 of a version file, we just want to emit a RELATIVE reloc.
4817 The entry in the global offset table will already have been
4818 initialized in the relocate_section function. */
4820 && h
->type
== STT_GNU_IFUNC
)
4824 /* Generate R_386_GLOB_DAT. */
4831 if (!h
->pointer_equality_needed
)
4834 /* For non-shared object, we can't use .got.plt, which
4835 contains the real function addres if we need pointer
4836 equality. We load the GOT entry with the PLT entry. */
4837 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4838 bfd_put_32 (output_bfd
,
4839 (plt
->output_section
->vma
4840 + plt
->output_offset
+ h
->plt
.offset
),
4841 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4845 else if (info
->shared
4846 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4848 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4849 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4853 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4855 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4856 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4857 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4860 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4865 Elf_Internal_Rela rel
;
4867 /* This symbol needs a copy reloc. Set it up. */
4869 if (h
->dynindx
== -1
4870 || (h
->root
.type
!= bfd_link_hash_defined
4871 && h
->root
.type
!= bfd_link_hash_defweak
)
4872 || htab
->srelbss
== NULL
)
4875 rel
.r_offset
= (h
->root
.u
.def
.value
4876 + h
->root
.u
.def
.section
->output_section
->vma
4877 + h
->root
.u
.def
.section
->output_offset
);
4878 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4879 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4885 /* Finish up local dynamic symbol handling. We set the contents of
4886 various dynamic sections here. */
4889 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4891 struct elf_link_hash_entry
*h
4892 = (struct elf_link_hash_entry
*) *slot
;
4893 struct bfd_link_info
*info
4894 = (struct bfd_link_info
*) inf
;
4896 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4900 /* Used to decide how to sort relocs in an optimal manner for the
4901 dynamic linker, before writing them out. */
4903 static enum elf_reloc_type_class
4904 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4905 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4906 const Elf_Internal_Rela
*rela
)
4908 switch (ELF32_R_TYPE (rela
->r_info
))
4910 case R_386_RELATIVE
:
4911 return reloc_class_relative
;
4912 case R_386_JUMP_SLOT
:
4913 return reloc_class_plt
;
4915 return reloc_class_copy
;
4917 return reloc_class_normal
;
4921 /* Finish up the dynamic sections. */
4924 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4925 struct bfd_link_info
*info
)
4927 struct elf_i386_link_hash_table
*htab
;
4930 const struct elf_i386_backend_data
*abed
;
4932 htab
= elf_i386_hash_table (info
);
4936 dynobj
= htab
->elf
.dynobj
;
4937 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4938 abed
= get_elf_i386_backend_data (output_bfd
);
4940 if (htab
->elf
.dynamic_sections_created
)
4942 Elf32_External_Dyn
*dyncon
, *dynconend
;
4944 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4947 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4948 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4949 for (; dyncon
< dynconend
; dyncon
++)
4951 Elf_Internal_Dyn dyn
;
4954 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4959 if (abed
->is_vxworks
4960 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4965 s
= htab
->elf
.sgotplt
;
4966 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4970 s
= htab
->elf
.srelplt
;
4971 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4975 s
= htab
->elf
.srelplt
;
4976 dyn
.d_un
.d_val
= s
->size
;
4980 /* My reading of the SVR4 ABI indicates that the
4981 procedure linkage table relocs (DT_JMPREL) should be
4982 included in the overall relocs (DT_REL). This is
4983 what Solaris does. However, UnixWare can not handle
4984 that case. Therefore, we override the DT_RELSZ entry
4985 here to make it not include the JMPREL relocs. */
4986 s
= htab
->elf
.srelplt
;
4989 dyn
.d_un
.d_val
-= s
->size
;
4993 /* We may not be using the standard ELF linker script.
4994 If .rel.plt is the first .rel section, we adjust
4995 DT_REL to not include it. */
4996 s
= htab
->elf
.srelplt
;
4999 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5001 dyn
.d_un
.d_ptr
+= s
->size
;
5005 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5008 /* Fill in the first entry in the procedure linkage table. */
5009 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5013 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5014 abed
->plt
->plt0_entry_size
);
5015 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5016 abed
->plt0_pad_byte
,
5017 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5021 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5022 abed
->plt
->plt0_entry_size
);
5023 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5024 abed
->plt0_pad_byte
,
5025 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5026 bfd_put_32 (output_bfd
,
5027 (htab
->elf
.sgotplt
->output_section
->vma
5028 + htab
->elf
.sgotplt
->output_offset
5030 htab
->elf
.splt
->contents
5031 + abed
->plt
->plt0_got1_offset
);
5032 bfd_put_32 (output_bfd
,
5033 (htab
->elf
.sgotplt
->output_section
->vma
5034 + htab
->elf
.sgotplt
->output_offset
5036 htab
->elf
.splt
->contents
5037 + abed
->plt
->plt0_got2_offset
);
5039 if (abed
->is_vxworks
)
5041 Elf_Internal_Rela rel
;
5043 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5044 On IA32 we use REL relocations so the addend goes in
5045 the PLT directly. */
5046 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5047 + htab
->elf
.splt
->output_offset
5048 + abed
->plt
->plt0_got1_offset
);
5049 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5050 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5051 htab
->srelplt2
->contents
);
5052 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5053 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5054 + htab
->elf
.splt
->output_offset
5055 + abed
->plt
->plt0_got2_offset
);
5056 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5057 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5058 htab
->srelplt2
->contents
+
5059 sizeof (Elf32_External_Rel
));
5063 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5064 really seem like the right value. */
5065 elf_section_data (htab
->elf
.splt
->output_section
)
5066 ->this_hdr
.sh_entsize
= 4;
5068 /* Correct the .rel.plt.unloaded relocations. */
5069 if (abed
->is_vxworks
&& !info
->shared
)
5071 int num_plts
= (htab
->elf
.splt
->size
5072 / abed
->plt
->plt_entry_size
) - 1;
5075 p
= htab
->srelplt2
->contents
;
5077 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5079 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5081 for (; num_plts
; num_plts
--)
5083 Elf_Internal_Rela rel
;
5084 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5085 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5086 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5087 p
+= sizeof (Elf32_External_Rel
);
5089 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5090 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5091 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5092 p
+= sizeof (Elf32_External_Rel
);
5098 if (htab
->elf
.sgotplt
)
5100 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5102 (*_bfd_error_handler
)
5103 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5107 /* Fill in the first three entries in the global offset table. */
5108 if (htab
->elf
.sgotplt
->size
> 0)
5110 bfd_put_32 (output_bfd
,
5112 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5113 htab
->elf
.sgotplt
->contents
);
5114 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5115 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5118 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5121 /* Adjust .eh_frame for .plt section. */
5122 if (htab
->plt_eh_frame
!= NULL
5123 && htab
->plt_eh_frame
->contents
!= NULL
)
5125 if (htab
->elf
.splt
!= NULL
5126 && htab
->elf
.splt
->size
!= 0
5127 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5128 && htab
->elf
.splt
->output_section
!= NULL
5129 && htab
->plt_eh_frame
->output_section
!= NULL
)
5131 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5132 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5133 + htab
->plt_eh_frame
->output_offset
5134 + PLT_FDE_START_OFFSET
;
5135 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5136 htab
->plt_eh_frame
->contents
5137 + PLT_FDE_START_OFFSET
);
5139 if (htab
->plt_eh_frame
->sec_info_type
5140 == SEC_INFO_TYPE_EH_FRAME
)
5142 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5144 htab
->plt_eh_frame
->contents
))
5149 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5150 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5152 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5153 htab_traverse (htab
->loc_hash_table
,
5154 elf_i386_finish_local_dynamic_symbol
,
5160 /* Return an array of PLT entry symbol values. */
5163 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5166 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5169 bfd_vma
*plt_sym_val
;
5171 bfd_byte
*plt_contents
;
5172 const struct elf_i386_backend_data
*bed
5173 = get_elf_i386_backend_data (abfd
);
5174 Elf_Internal_Shdr
*hdr
;
5176 /* Get the .plt section contents. */
5177 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5178 if (plt_contents
== NULL
)
5180 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5181 plt_contents
, 0, plt
->size
))
5184 free (plt_contents
);
5188 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5189 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5192 hdr
= &elf_section_data (relplt
)->this_hdr
;
5193 count
= relplt
->size
/ hdr
->sh_entsize
;
5195 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5196 if (plt_sym_val
== NULL
)
5199 for (i
= 0; i
< count
; i
++)
5200 plt_sym_val
[i
] = -1;
5202 plt_offset
= bed
->plt
->plt_entry_size
;
5203 p
= relplt
->relocation
;
5204 for (i
= 0; i
< count
; i
++, p
++)
5208 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5209 if (p
->howto
== NULL
)
5212 if (p
->howto
->type
!= R_386_JUMP_SLOT
5213 && p
->howto
->type
!= R_386_IRELATIVE
)
5216 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5217 + bed
->plt
->plt_reloc_offset
));
5218 reloc_index
/= sizeof (Elf32_External_Rel
);
5219 if (reloc_index
>= count
)
5221 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5222 plt_offset
+= bed
->plt
->plt_entry_size
;
5225 free (plt_contents
);
5230 /* Similar to _bfd_elf_get_synthetic_symtab. */
5233 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5240 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5241 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5242 dynsymcount
, dynsyms
, ret
,
5244 elf_i386_get_plt_sym_val
);
5247 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5250 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5252 if (h
->plt
.offset
!= (bfd_vma
) -1
5254 && !h
->pointer_equality_needed
)
5257 return _bfd_elf_hash_symbol (h
);
5260 /* Hook called by the linker routine which adds symbols from an object
5264 elf_i386_add_symbol_hook (bfd
* abfd
,
5265 struct bfd_link_info
* info
,
5266 Elf_Internal_Sym
* sym
,
5267 const char ** namep ATTRIBUTE_UNUSED
,
5268 flagword
* flagsp ATTRIBUTE_UNUSED
,
5269 asection
** secp ATTRIBUTE_UNUSED
,
5270 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5272 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5273 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5274 && (abfd
->flags
& DYNAMIC
) == 0
5275 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5276 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5281 #define TARGET_LITTLE_SYM i386_elf32_vec
5282 #define TARGET_LITTLE_NAME "elf32-i386"
5283 #define ELF_ARCH bfd_arch_i386
5284 #define ELF_TARGET_ID I386_ELF_DATA
5285 #define ELF_MACHINE_CODE EM_386
5286 #define ELF_MAXPAGESIZE 0x1000
5288 #define elf_backend_can_gc_sections 1
5289 #define elf_backend_can_refcount 1
5290 #define elf_backend_want_got_plt 1
5291 #define elf_backend_plt_readonly 1
5292 #define elf_backend_want_plt_sym 0
5293 #define elf_backend_got_header_size 12
5294 #define elf_backend_plt_alignment 4
5295 #define elf_backend_extern_protected_data 1
5297 /* Support RELA for objdump of prelink objects. */
5298 #define elf_info_to_howto elf_i386_info_to_howto_rel
5299 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5301 #define bfd_elf32_mkobject elf_i386_mkobject
5303 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5304 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5305 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5306 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5307 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5309 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5310 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5311 #define elf_backend_check_relocs elf_i386_check_relocs
5312 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5313 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5314 #define elf_backend_fake_sections elf_i386_fake_sections
5315 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5316 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5317 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5318 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5319 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5320 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5321 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5322 #define elf_backend_relocate_section elf_i386_relocate_section
5323 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5324 #define elf_backend_always_size_sections elf_i386_always_size_sections
5325 #define elf_backend_omit_section_dynsym \
5326 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5327 #define elf_backend_hash_symbol elf_i386_hash_symbol
5328 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5330 #include "elf32-target.h"
5332 /* FreeBSD support. */
5334 #undef TARGET_LITTLE_SYM
5335 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5336 #undef TARGET_LITTLE_NAME
5337 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5339 #define ELF_OSABI ELFOSABI_FREEBSD
5341 /* The kernel recognizes executables as valid only if they carry a
5342 "FreeBSD" label in the ELF header. So we put this label on all
5343 executables and (for simplicity) also all other object files. */
5346 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5348 _bfd_elf_post_process_headers (abfd
, info
);
5350 #ifdef OLD_FREEBSD_ABI_LABEL
5352 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5353 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5354 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5359 #undef elf_backend_post_process_headers
5360 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5362 #define elf32_bed elf32_i386_fbsd_bed
5364 #undef elf_backend_add_symbol_hook
5366 #include "elf32-target.h"
5370 #undef TARGET_LITTLE_SYM
5371 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5372 #undef TARGET_LITTLE_NAME
5373 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5375 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5376 objects won't be recognized. */
5380 #define elf32_bed elf32_i386_sol2_bed
5382 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5384 #undef elf_backend_static_tls_alignment
5385 #define elf_backend_static_tls_alignment 8
5387 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5389 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5391 #undef elf_backend_want_plt_sym
5392 #define elf_backend_want_plt_sym 1
5394 #include "elf32-target.h"
5396 /* Native Client support. */
5398 #undef TARGET_LITTLE_SYM
5399 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5400 #undef TARGET_LITTLE_NAME
5401 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5403 #define elf32_bed elf32_i386_nacl_bed
5405 #undef ELF_MAXPAGESIZE
5406 #define ELF_MAXPAGESIZE 0x10000
5408 /* Restore defaults. */
5410 #undef elf_backend_want_plt_sym
5411 #define elf_backend_want_plt_sym 0
5412 #undef elf_backend_post_process_headers
5413 #undef elf_backend_static_tls_alignment
5415 /* NaCl uses substantially different PLT entries for the same effects. */
5417 #undef elf_backend_plt_alignment
5418 #define elf_backend_plt_alignment 5
5419 #define NACL_PLT_ENTRY_SIZE 64
5420 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5422 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5424 0xff, 0x35, /* pushl contents of address */
5425 0, 0, 0, 0, /* replaced with address of .got + 4. */
5426 0x8b, 0x0d, /* movl contents of address, %ecx */
5427 0, 0, 0, 0, /* replaced with address of .got + 8. */
5428 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5429 0xff, 0xe1 /* jmp *%ecx */
5432 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5434 0x8b, 0x0d, /* movl contents of address, %ecx */
5435 0, 0, 0, 0, /* replaced with GOT slot address. */
5436 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5437 0xff, 0xe1, /* jmp *%ecx */
5439 /* Pad to the next 32-byte boundary with nop instructions. */
5441 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5442 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5444 /* Lazy GOT entries point here (32-byte aligned). */
5445 0x68, /* pushl immediate */
5446 0, 0, 0, 0, /* replaced with reloc offset. */
5447 0xe9, /* jmp relative */
5448 0, 0, 0, 0, /* replaced with offset to .plt. */
5450 /* Pad to the next 32-byte boundary with nop instructions. */
5451 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5452 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5456 static const bfd_byte
5457 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5459 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5460 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5461 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5462 0xff, 0xe1, /* jmp *%ecx */
5464 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5465 so pad to that size with nop instructions. */
5466 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5469 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5471 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5472 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5473 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5474 0xff, 0xe1, /* jmp *%ecx */
5476 /* Pad to the next 32-byte boundary with nop instructions. */
5478 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5479 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5481 /* Lazy GOT entries point here (32-byte aligned). */
5482 0x68, /* pushl immediate */
5483 0, 0, 0, 0, /* replaced with offset into relocation table. */
5484 0xe9, /* jmp relative */
5485 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5487 /* Pad to the next 32-byte boundary with nop instructions. */
5488 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5489 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5493 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5495 #if (PLT_CIE_LENGTH != 20 \
5496 || PLT_FDE_LENGTH != 36 \
5497 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5498 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5499 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5501 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5502 0, 0, 0, 0, /* CIE ID */
5503 1, /* CIE version */
5504 'z', 'R', 0, /* Augmentation string */
5505 1, /* Code alignment factor */
5506 0x7c, /* Data alignment factor: -4 */
5507 8, /* Return address column */
5508 1, /* Augmentation size */
5509 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5510 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5511 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5512 DW_CFA_nop
, DW_CFA_nop
,
5514 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5515 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5516 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5517 0, 0, 0, 0, /* .plt size goes here */
5518 0, /* Augmentation size */
5519 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5520 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5521 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5522 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5523 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5524 13, /* Block length */
5525 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5526 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5527 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5528 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5529 DW_CFA_nop
, DW_CFA_nop
5532 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5534 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5535 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5536 2, /* plt0_got1_offset */
5537 8, /* plt0_got2_offset */
5538 elf_i386_nacl_plt_entry
, /* plt_entry */
5539 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5540 2, /* plt_got_offset */
5541 33, /* plt_reloc_offset */
5542 38, /* plt_plt_offset */
5543 32, /* plt_lazy_offset */
5544 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5545 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5546 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5547 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5550 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5552 &elf_i386_nacl_plt
, /* plt */
5553 0x90, /* plt0_pad_byte: nop insn */
5558 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5560 /* Set the right machine number for a NaCl i386 ELF32 file. */
5561 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5565 #undef elf_backend_arch_data
5566 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5568 #undef elf_backend_object_p
5569 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5570 #undef elf_backend_modify_segment_map
5571 #define elf_backend_modify_segment_map nacl_modify_segment_map
5572 #undef elf_backend_modify_program_headers
5573 #define elf_backend_modify_program_headers nacl_modify_program_headers
5574 #undef elf_backend_final_write_processing
5575 #define elf_backend_final_write_processing nacl_final_write_processing
5577 #include "elf32-target.h"
5579 /* Restore defaults. */
5580 #undef elf_backend_object_p
5581 #undef elf_backend_modify_segment_map
5582 #undef elf_backend_modify_program_headers
5583 #undef elf_backend_final_write_processing
5585 /* VxWorks support. */
5587 #undef TARGET_LITTLE_SYM
5588 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5589 #undef TARGET_LITTLE_NAME
5590 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5592 #undef elf_backend_plt_alignment
5593 #define elf_backend_plt_alignment 4
5595 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5597 &elf_i386_plt
, /* plt */
5598 0x90, /* plt0_pad_byte */
5602 #undef elf_backend_arch_data
5603 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5605 #undef elf_backend_relocs_compatible
5606 #undef elf_backend_add_symbol_hook
5607 #define elf_backend_add_symbol_hook \
5608 elf_vxworks_add_symbol_hook
5609 #undef elf_backend_link_output_symbol_hook
5610 #define elf_backend_link_output_symbol_hook \
5611 elf_vxworks_link_output_symbol_hook
5612 #undef elf_backend_emit_relocs
5613 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5614 #undef elf_backend_final_write_processing
5615 #define elf_backend_final_write_processing \
5616 elf_vxworks_final_write_processing
5617 #undef elf_backend_static_tls_alignment
5619 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5621 #undef elf_backend_want_plt_sym
5622 #define elf_backend_want_plt_sym 1
5625 #define elf32_bed elf32_i386_vxworks_bed
5627 #include "elf32-target.h"