1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 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. */
21 #include "elfxx-x86.h"
23 #include "elf-vxworks.h"
25 #include "opcode/i386.h"
27 /* 386 uses REL relocations instead of RELA. */
32 static reloc_howto_type elf_howto_table
[]=
34 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
35 bfd_elf_generic_reloc
, "R_386_NONE",
36 TRUE
, 0x00000000, 0x00000000, FALSE
),
37 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
38 bfd_elf_generic_reloc
, "R_386_32",
39 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
40 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
41 bfd_elf_generic_reloc
, "R_386_PC32",
42 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
43 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_GOT32",
45 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
46 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_PLT32",
48 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
49 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_COPY",
51 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
52 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
54 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
55 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_RELATIVE",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_GOTOFF",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_GOTPC",
66 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
68 /* We have a gap in the reloc numbers here.
69 R_386_standard counts the number up to this point, and
70 R_386_ext_offset is the value to subtract from a reloc type of
71 R_386_16 thru R_386_PC8 to form an index into this table. */
72 #define R_386_standard (R_386_GOTPC + 1)
73 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
75 /* These relocs are a GNU extension. */
76 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
77 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
78 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
79 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_386_TLS_IE",
81 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
82 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_LE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_GD",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_16",
96 TRUE
, 0xffff, 0xffff, FALSE
),
97 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_PC16",
99 TRUE
, 0xffff, 0xffff, TRUE
),
100 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_8",
102 TRUE
, 0xff, 0xff, FALSE
),
103 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
104 bfd_elf_generic_reloc
, "R_386_PC8",
105 TRUE
, 0xff, 0xff, TRUE
),
107 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
108 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
109 /* These are common with Solaris TLS implementation. */
110 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
111 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
112 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
113 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
114 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
115 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
116 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
129 bfd_elf_generic_reloc
, "R_386_SIZE32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
135 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
137 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
139 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
140 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
141 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
142 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
143 HOWTO(R_386_GOT32X
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_GOT32X",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
148 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT
, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE
, /* pc_relative */
158 complain_overflow_dont
, /* complain_on_overflow */
159 NULL
, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE
, /* partial_inplace */
164 FALSE
), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY
, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE
, /* pc_relative */
173 complain_overflow_dont
, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE
, /* partial_inplace */
179 FALSE
) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32)
187 #define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32)
189 #ifdef DEBUG_GEN_RELOC
191 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
196 static reloc_howto_type
*
197 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
198 bfd_reloc_code_real_type code
)
203 TRACE ("BFD_RELOC_NONE");
204 return &elf_howto_table
[R_386_NONE
];
207 TRACE ("BFD_RELOC_32");
208 return &elf_howto_table
[R_386_32
];
211 TRACE ("BFD_RELOC_CTOR");
212 return &elf_howto_table
[R_386_32
];
214 case BFD_RELOC_32_PCREL
:
215 TRACE ("BFD_RELOC_PC32");
216 return &elf_howto_table
[R_386_PC32
];
218 case BFD_RELOC_386_GOT32
:
219 TRACE ("BFD_RELOC_386_GOT32");
220 return &elf_howto_table
[R_386_GOT32
];
222 case BFD_RELOC_386_PLT32
:
223 TRACE ("BFD_RELOC_386_PLT32");
224 return &elf_howto_table
[R_386_PLT32
];
226 case BFD_RELOC_386_COPY
:
227 TRACE ("BFD_RELOC_386_COPY");
228 return &elf_howto_table
[R_386_COPY
];
230 case BFD_RELOC_386_GLOB_DAT
:
231 TRACE ("BFD_RELOC_386_GLOB_DAT");
232 return &elf_howto_table
[R_386_GLOB_DAT
];
234 case BFD_RELOC_386_JUMP_SLOT
:
235 TRACE ("BFD_RELOC_386_JUMP_SLOT");
236 return &elf_howto_table
[R_386_JUMP_SLOT
];
238 case BFD_RELOC_386_RELATIVE
:
239 TRACE ("BFD_RELOC_386_RELATIVE");
240 return &elf_howto_table
[R_386_RELATIVE
];
242 case BFD_RELOC_386_GOTOFF
:
243 TRACE ("BFD_RELOC_386_GOTOFF");
244 return &elf_howto_table
[R_386_GOTOFF
];
246 case BFD_RELOC_386_GOTPC
:
247 TRACE ("BFD_RELOC_386_GOTPC");
248 return &elf_howto_table
[R_386_GOTPC
];
250 /* These relocs are a GNU extension. */
251 case BFD_RELOC_386_TLS_TPOFF
:
252 TRACE ("BFD_RELOC_386_TLS_TPOFF");
253 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
255 case BFD_RELOC_386_TLS_IE
:
256 TRACE ("BFD_RELOC_386_TLS_IE");
257 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
259 case BFD_RELOC_386_TLS_GOTIE
:
260 TRACE ("BFD_RELOC_386_TLS_GOTIE");
261 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
263 case BFD_RELOC_386_TLS_LE
:
264 TRACE ("BFD_RELOC_386_TLS_LE");
265 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
267 case BFD_RELOC_386_TLS_GD
:
268 TRACE ("BFD_RELOC_386_TLS_GD");
269 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
271 case BFD_RELOC_386_TLS_LDM
:
272 TRACE ("BFD_RELOC_386_TLS_LDM");
273 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
276 TRACE ("BFD_RELOC_16");
277 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
279 case BFD_RELOC_16_PCREL
:
280 TRACE ("BFD_RELOC_16_PCREL");
281 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
284 TRACE ("BFD_RELOC_8");
285 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
287 case BFD_RELOC_8_PCREL
:
288 TRACE ("BFD_RELOC_8_PCREL");
289 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
291 /* Common with Sun TLS implementation. */
292 case BFD_RELOC_386_TLS_LDO_32
:
293 TRACE ("BFD_RELOC_386_TLS_LDO_32");
294 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
296 case BFD_RELOC_386_TLS_IE_32
:
297 TRACE ("BFD_RELOC_386_TLS_IE_32");
298 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
300 case BFD_RELOC_386_TLS_LE_32
:
301 TRACE ("BFD_RELOC_386_TLS_LE_32");
302 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
304 case BFD_RELOC_386_TLS_DTPMOD32
:
305 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
306 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
308 case BFD_RELOC_386_TLS_DTPOFF32
:
309 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
310 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
312 case BFD_RELOC_386_TLS_TPOFF32
:
313 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
314 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
316 case BFD_RELOC_SIZE32
:
317 TRACE ("BFD_RELOC_SIZE32");
318 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
320 case BFD_RELOC_386_TLS_GOTDESC
:
321 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
322 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
324 case BFD_RELOC_386_TLS_DESC_CALL
:
325 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
326 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
328 case BFD_RELOC_386_TLS_DESC
:
329 TRACE ("BFD_RELOC_386_TLS_DESC");
330 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
332 case BFD_RELOC_386_IRELATIVE
:
333 TRACE ("BFD_RELOC_386_IRELATIVE");
334 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
336 case BFD_RELOC_386_GOT32X
:
337 TRACE ("BFD_RELOC_386_GOT32X");
338 return &elf_howto_table
[R_386_GOT32X
- R_386_tls_offset
];
340 case BFD_RELOC_VTABLE_INHERIT
:
341 TRACE ("BFD_RELOC_VTABLE_INHERIT");
342 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
344 case BFD_RELOC_VTABLE_ENTRY
:
345 TRACE ("BFD_RELOC_VTABLE_ENTRY");
346 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
356 static reloc_howto_type
*
357 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
362 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
363 if (elf_howto_table
[i
].name
!= NULL
364 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
365 return &elf_howto_table
[i
];
370 static reloc_howto_type
*
371 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
375 if ((indx
= r_type
) >= R_386_standard
376 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
377 >= R_386_ext
- R_386_standard
)
378 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
379 >= R_386_ext2
- R_386_ext
)
380 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext2
381 >= R_386_vt
- R_386_ext2
))
383 /* xgettext:c-format */
384 _bfd_error_handler (_("%B: invalid relocation type %d"),
388 /* PR 17512: file: 0f67f69d. */
389 if (elf_howto_table
[indx
].type
!= r_type
)
391 return &elf_howto_table
[indx
];
395 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
397 Elf_Internal_Rela
*dst
)
399 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
400 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
403 /* Return whether a symbol name implies a local label. The UnixWare
404 2.1 cc generates temporary symbols that start with .X, so we
405 recognize them here. FIXME: do other SVR4 compilers also use .X?.
406 If so, we should move the .X recognition into
407 _bfd_elf_is_local_label_name. */
410 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
412 if (name
[0] == '.' && name
[1] == 'X')
415 return _bfd_elf_is_local_label_name (abfd
, name
);
418 /* Support for core dump NOTE sections. */
421 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
426 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
428 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
434 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
437 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
441 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
445 switch (note
->descsz
)
450 case 144: /* Linux/i386 */
452 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
455 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
465 /* Make a ".reg/999" section. */
466 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
467 size
, note
->descpos
+ offset
);
471 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
473 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
475 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
480 elf_tdata (abfd
)->core
->program
481 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
482 elf_tdata (abfd
)->core
->command
483 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
487 switch (note
->descsz
)
492 case 124: /* Linux/i386 elf_prpsinfo. */
493 elf_tdata (abfd
)->core
->pid
494 = bfd_get_32 (abfd
, note
->descdata
+ 12);
495 elf_tdata (abfd
)->core
->program
496 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
497 elf_tdata (abfd
)->core
->command
498 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
502 /* Note that for some reason, a spurious space is tacked
503 onto the end of the args in some (at least one anyway)
504 implementations, so strip it off if it exists. */
506 char *command
= elf_tdata (abfd
)->core
->command
;
507 int n
= strlen (command
);
509 if (0 < n
&& command
[n
- 1] == ' ')
510 command
[n
- 1] = '\0';
516 /* Functions for the i386 ELF linker.
518 In order to gain some understanding of code in this file without
519 knowing all the intricate details of the linker, note the
522 Functions named elf_i386_* are called by external routines, other
523 functions are only called locally. elf_i386_* functions appear
524 in this file more or less in the order in which they are called
525 from external routines. eg. elf_i386_check_relocs is called
526 early in the link process, elf_i386_finish_dynamic_sections is
527 one of the last functions. */
529 /* The size in bytes of an entry in the lazy procedure linkage table. */
531 #define LAZY_PLT_ENTRY_SIZE 16
533 /* The size in bytes of an entry in the non-lazy procedure linkage
536 #define NON_LAZY_PLT_ENTRY_SIZE 8
538 /* The first entry in an absolute lazy procedure linkage table looks
539 like this. See the SVR4 ABI i386 supplement to see how this works.
540 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
542 static const bfd_byte elf_i386_lazy_plt0_entry
[12] =
544 0xff, 0x35, /* pushl contents of address */
545 0, 0, 0, 0, /* replaced with address of .got + 4. */
546 0xff, 0x25, /* jmp indirect */
547 0, 0, 0, 0 /* replaced with address of .got + 8. */
550 /* Subsequent entries in an absolute lazy procedure linkage table look
553 static const bfd_byte elf_i386_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
555 0xff, 0x25, /* jmp indirect */
556 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
557 0x68, /* pushl immediate */
558 0, 0, 0, 0, /* replaced with offset into relocation table. */
559 0xe9, /* jmp relative */
560 0, 0, 0, 0 /* replaced with offset to start of .plt. */
563 /* The first entry in a PIC lazy procedure linkage table look like
564 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
565 lazy_plt->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_lazy_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 lazy procedure linkage table look like
576 static const bfd_byte elf_i386_pic_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
578 0xff, 0xa3, /* jmp *offset(%ebx) */
579 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
580 0x68, /* pushl immediate */
581 0, 0, 0, 0, /* replaced with offset into relocation table. */
582 0xe9, /* jmp relative */
583 0, 0, 0, 0 /* replaced with offset to start of .plt. */
586 /* Entries in the non-lazy procedure linkage table look like this. */
588 static const bfd_byte elf_i386_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
590 0xff, 0x25, /* jmp indirect */
591 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
592 0x66, 0x90 /* xchg %ax,%ax */
595 /* Entries in the PIC non-lazy procedure linkage table look like
598 static const bfd_byte elf_i386_pic_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
600 0xff, 0xa3, /* jmp *offset(%ebx) */
601 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
602 0x66, 0x90 /* xchg %ax,%ax */
605 /* The first entry in an absolute IBT-enabled lazy procedure linkage
606 table looks like this. */
608 static const bfd_byte elf_i386_lazy_ibt_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
610 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
611 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
612 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
615 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
616 table look like this. Subsequent entries for a PIC IBT-enabled lazy
617 procedure linkage table are the same. */
619 static const bfd_byte elf_i386_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
621 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
622 0x68, 0, 0, 0, 0, /* pushl immediate */
623 0xe9, 0, 0, 0, 0, /* jmp relative */
624 0x66, 0x90 /* xchg %ax,%ax */
627 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
630 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
632 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
633 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
634 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
637 /* Entries for branches with IBT-enabled in the absolute non-lazey
638 procedure linkage table look like this. They have the same size
639 as the lazy PLT entry. */
641 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
643 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
644 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
645 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
648 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
649 linkage table look like this. They have the same size as the lazy
652 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
654 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
655 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
656 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
659 /* .eh_frame covering the lazy .plt section. */
661 static const bfd_byte elf_i386_eh_frame_lazy_plt
[] =
663 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
664 0, 0, 0, 0, /* CIE ID */
666 'z', 'R', 0, /* Augmentation string */
667 1, /* Code alignment factor */
668 0x7c, /* Data alignment factor */
669 8, /* Return address column */
670 1, /* Augmentation size */
671 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
672 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
673 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
674 DW_CFA_nop
, DW_CFA_nop
,
676 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
677 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
678 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
679 0, 0, 0, 0, /* .plt size goes here */
680 0, /* Augmentation size */
681 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
682 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
683 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
684 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
685 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
686 11, /* Block length */
687 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
688 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
689 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
690 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
691 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
694 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
696 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt
[] =
698 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
699 0, 0, 0, 0, /* CIE ID */
701 'z', 'R', 0, /* Augmentation string */
702 1, /* Code alignment factor */
703 0x7c, /* Data alignment factor */
704 8, /* Return address column */
705 1, /* Augmentation size */
706 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
707 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
708 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
709 DW_CFA_nop
, DW_CFA_nop
,
711 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
712 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
713 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
714 0, 0, 0, 0, /* .plt size goes here */
715 0, /* Augmentation size */
716 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
717 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
718 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
719 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
720 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
721 11, /* Block length */
722 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
723 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
724 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
725 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
726 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
729 /* .eh_frame covering the non-lazy .plt section. */
731 static const bfd_byte elf_i386_eh_frame_non_lazy_plt
[] =
733 #define PLT_GOT_FDE_LENGTH 16
734 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
735 0, 0, 0, 0, /* CIE ID */
737 'z', 'R', 0, /* Augmentation string */
738 1, /* Code alignment factor */
739 0x7c, /* Data alignment factor */
740 8, /* Return address column */
741 1, /* Augmentation size */
742 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
743 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
744 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
745 DW_CFA_nop
, DW_CFA_nop
,
747 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
748 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
749 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
750 0, 0, 0, 0, /* non-lazy .plt size goes here */
751 0, /* Augmentation size */
752 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
755 /* These are the standard parameters. */
756 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt
=
758 elf_i386_lazy_plt0_entry
, /* plt0_entry */
759 sizeof (elf_i386_lazy_plt0_entry
), /* plt0_entry_size */
760 elf_i386_lazy_plt_entry
, /* plt_entry */
761 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
762 2, /* plt0_got1_offset */
763 8, /* plt0_got2_offset */
764 0, /* plt0_got2_insn_end */
765 2, /* plt_got_offset */
766 7, /* plt_reloc_offset */
767 12, /* plt_plt_offset */
768 0, /* plt_got_insn_size */
769 0, /* plt_plt_insn_end */
770 6, /* plt_lazy_offset */
771 elf_i386_pic_lazy_plt0_entry
, /* pic_plt0_entry */
772 elf_i386_pic_lazy_plt_entry
, /* pic_plt_entry */
773 elf_i386_eh_frame_lazy_plt
, /* eh_frame_plt */
774 sizeof (elf_i386_eh_frame_lazy_plt
) /* eh_frame_plt_size */
777 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt
=
779 elf_i386_non_lazy_plt_entry
, /* plt_entry */
780 elf_i386_pic_non_lazy_plt_entry
, /* pic_plt_entry */
781 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
782 2, /* plt_got_offset */
783 0, /* plt_got_insn_size */
784 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
785 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
788 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt
=
790 elf_i386_lazy_ibt_plt0_entry
, /* plt0_entry */
791 sizeof (elf_i386_lazy_ibt_plt0_entry
), /* plt0_entry_size */
792 elf_i386_lazy_ibt_plt_entry
, /* plt_entry */
793 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
794 2, /* plt0_got1_offset */
795 8, /* plt0_got2_offset */
796 0, /* plt0_got2_insn_end */
797 4+2, /* plt_got_offset */
798 4+1, /* plt_reloc_offset */
799 4+6, /* plt_plt_offset */
800 0, /* plt_got_insn_size */
801 0, /* plt_plt_insn_end */
802 0, /* plt_lazy_offset */
803 elf_i386_pic_lazy_ibt_plt0_entry
, /* pic_plt0_entry */
804 elf_i386_lazy_ibt_plt_entry
, /* pic_plt_entry */
805 elf_i386_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
806 sizeof (elf_i386_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
809 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt
=
811 elf_i386_non_lazy_ibt_plt_entry
, /* plt_entry */
812 elf_i386_pic_non_lazy_ibt_plt_entry
,/* pic_plt_entry */
813 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
814 4+2, /* plt_got_offset */
815 0, /* plt_got_insn_size */
816 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
817 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
821 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
822 for the PLTResolve stub and then for each PLT entry. */
823 #define PLTRESOLVE_RELOCS_SHLIB 0
824 #define PLTRESOLVE_RELOCS 2
825 #define PLT_NON_JUMP_SLOT_RELOCS 2
827 /* These are the standard parameters. */
828 static const struct elf_x86_backend_data elf_i386_arch_bed
=
833 #define elf_backend_arch_data &elf_i386_arch_bed
835 /* Return TRUE if the TLS access code sequence support transition
839 elf_i386_check_tls_transition (asection
*sec
,
841 Elf_Internal_Shdr
*symtab_hdr
,
842 struct elf_link_hash_entry
**sym_hashes
,
844 const Elf_Internal_Rela
*rel
,
845 const Elf_Internal_Rela
*relend
)
847 unsigned int val
, type
, reg
;
848 unsigned long r_symndx
;
849 struct elf_link_hash_entry
*h
;
852 bfd_boolean indirect_call
;
854 offset
= rel
->r_offset
;
859 if (offset
< 2 || (rel
+ 1) >= relend
)
862 indirect_call
= FALSE
;
863 call
= contents
+ offset
+ 4;
866 if (r_type
== R_386_TLS_GD
)
868 /* Check transition from GD access model. Only
869 leal foo@tlsgd(,%ebx,1), %eax
870 call ___tls_get_addr@PLT
872 leal foo@tlsgd(%ebx) %eax
873 call ___tls_get_addr@PLT
876 leal foo@tlsgd(%reg), %eax
877 call *___tls_get_addr@GOT(%reg)
878 which may be converted to
879 addr32 call ___tls_get_addr
880 can transit to different access model. */
881 if ((offset
+ 10) > sec
->size
882 || (type
!= 0x8d && type
!= 0x04))
887 /* leal foo@tlsgd(,%ebx,1), %eax
888 call ___tls_get_addr@PLT */
892 if (*(call
- 7) != 0x8d
900 leal foo@tlsgd(%ebx), %eax
901 call ___tls_get_addr@PLT
904 leal foo@tlsgd(%reg), %eax
905 call *___tls_get_addr@GOT(%reg)
906 which may be converted to
907 addr32 call ___tls_get_addr
909 %eax can't be used as the GOT base register since it
910 is used to pass parameter to ___tls_get_addr. */
912 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
915 indirect_call
= call
[0] == 0xff;
916 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
917 && !(call
[0] == 0x67 && call
[1] == 0xe8)
919 && (call
[1] & 0xf8) == 0x90
920 && (call
[1] & 0x7) == reg
))
926 /* Check transition from LD access model. Only
927 leal foo@tlsldm(%ebx), %eax
928 call ___tls_get_addr@PLT
930 leal foo@tlsldm(%reg), %eax
931 call *___tls_get_addr@GOT(%reg)
932 which may be converted to
933 addr32 call ___tls_get_addr
934 can transit to different access model. */
935 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
938 /* %eax can't be used as the GOT base register since it is
939 used to pass parameter to ___tls_get_addr. */
941 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
944 indirect_call
= call
[0] == 0xff;
945 if (!(reg
== 3 && call
[0] == 0xe8)
946 && !(call
[0] == 0x67 && call
[1] == 0xe8)
948 && (call
[1] & 0xf8) == 0x90
949 && (call
[1] & 0x7) == reg
))
953 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
954 if (r_symndx
< symtab_hdr
->sh_info
)
957 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
959 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
961 else if (indirect_call
)
962 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
964 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
965 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
968 /* Check transition from IE access model:
969 movl foo@indntpoff(%rip), %eax
970 movl foo@indntpoff(%rip), %reg
971 addl foo@indntpoff(%rip), %reg
974 if (offset
< 1 || (offset
+ 4) > sec
->size
)
977 /* Check "movl foo@tpoff(%rip), %eax" first. */
978 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
985 /* Check movl|addl foo@tpoff(%rip), %reg. */
986 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
987 return ((type
== 0x8b || type
== 0x03)
988 && (val
& 0xc7) == 0x05);
990 case R_386_TLS_GOTIE
:
991 case R_386_TLS_IE_32
:
992 /* Check transition from {IE_32,GOTIE} access model:
993 subl foo@{tpoff,gontoff}(%reg1), %reg2
994 movl foo@{tpoff,gontoff}(%reg1), %reg2
995 addl foo@{tpoff,gontoff}(%reg1), %reg2
998 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1001 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1002 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1005 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1006 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1008 case R_386_TLS_GOTDESC
:
1009 /* Check transition from GDesc access model:
1010 leal x@tlsdesc(%ebx), %eax
1012 Make sure it's a leal adding ebx to a 32-bit offset
1013 into any register, although it's probably almost always
1016 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1019 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1022 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1023 return (val
& 0xc7) == 0x83;
1025 case R_386_TLS_DESC_CALL
:
1026 /* Check transition from GDesc access model:
1027 call *x@tlsdesc(%eax)
1029 if (offset
+ 2 <= sec
->size
)
1031 /* Make sure that it's a call *x@tlsdesc(%eax). */
1032 call
= contents
+ offset
;
1033 return call
[0] == 0xff && call
[1] == 0x10;
1043 /* Return TRUE if the TLS access transition is OK or no transition
1044 will be performed. Update R_TYPE if there is a transition. */
1047 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1048 asection
*sec
, bfd_byte
*contents
,
1049 Elf_Internal_Shdr
*symtab_hdr
,
1050 struct elf_link_hash_entry
**sym_hashes
,
1051 unsigned int *r_type
, int tls_type
,
1052 const Elf_Internal_Rela
*rel
,
1053 const Elf_Internal_Rela
*relend
,
1054 struct elf_link_hash_entry
*h
,
1055 unsigned long r_symndx
,
1056 bfd_boolean from_relocate_section
)
1058 unsigned int from_type
= *r_type
;
1059 unsigned int to_type
= from_type
;
1060 bfd_boolean check
= TRUE
;
1062 /* Skip TLS transition for functions. */
1064 && (h
->type
== STT_FUNC
1065 || h
->type
== STT_GNU_IFUNC
))
1071 case R_386_TLS_GOTDESC
:
1072 case R_386_TLS_DESC_CALL
:
1073 case R_386_TLS_IE_32
:
1075 case R_386_TLS_GOTIE
:
1076 if (bfd_link_executable (info
))
1079 to_type
= R_386_TLS_LE_32
;
1080 else if (from_type
!= R_386_TLS_IE
1081 && from_type
!= R_386_TLS_GOTIE
)
1082 to_type
= R_386_TLS_IE_32
;
1085 /* When we are called from elf_i386_relocate_section, there may
1086 be additional transitions based on TLS_TYPE. */
1087 if (from_relocate_section
)
1089 unsigned int new_to_type
= to_type
;
1091 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1092 new_to_type
= R_386_TLS_LE_32
;
1094 if (to_type
== R_386_TLS_GD
1095 || to_type
== R_386_TLS_GOTDESC
1096 || to_type
== R_386_TLS_DESC_CALL
)
1098 if (tls_type
== GOT_TLS_IE_POS
)
1099 new_to_type
= R_386_TLS_GOTIE
;
1100 else if (tls_type
& GOT_TLS_IE
)
1101 new_to_type
= R_386_TLS_IE_32
;
1104 /* We checked the transition before when we were called from
1105 elf_i386_check_relocs. We only want to check the new
1106 transition which hasn't been checked before. */
1107 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1108 to_type
= new_to_type
;
1114 if (bfd_link_executable (info
))
1115 to_type
= R_386_TLS_LE_32
;
1122 /* Return TRUE if there is no transition. */
1123 if (from_type
== to_type
)
1126 /* Check if the transition can be performed. */
1128 && ! elf_i386_check_tls_transition (sec
, contents
,
1129 symtab_hdr
, sym_hashes
,
1130 from_type
, rel
, relend
))
1132 reloc_howto_type
*from
, *to
;
1135 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1136 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1139 name
= h
->root
.root
.string
;
1142 struct elf_x86_link_hash_table
*htab
;
1144 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
1149 Elf_Internal_Sym
*isym
;
1151 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1153 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1158 /* xgettext:c-format */
1159 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1160 "in section `%A' failed"),
1161 abfd
, from
->name
, to
->name
, name
,
1162 rel
->r_offset
, sec
);
1163 bfd_set_error (bfd_error_bad_value
);
1171 /* With the local symbol, foo, we convert
1172 mov foo@GOT[(%reg1)], %reg2
1174 lea foo[@GOTOFF(%reg1)], %reg2
1176 call/jmp *foo@GOT[(%reg)]
1178 nop call foo/jmp foo nop
1179 When PIC is false, convert
1180 test %reg1, foo@GOT[(%reg2)]
1184 binop foo@GOT[(%reg1)], %reg2
1187 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1192 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1194 unsigned int *r_type_p
,
1195 Elf_Internal_Rela
*irel
,
1196 struct elf_link_hash_entry
*h
,
1197 bfd_boolean
*converted
,
1198 struct bfd_link_info
*link_info
)
1200 struct elf_x86_link_hash_table
*htab
;
1201 unsigned int opcode
;
1203 bfd_boolean baseless
;
1204 Elf_Internal_Sym
*isym
;
1205 unsigned int addend
;
1209 bfd_boolean to_reloc_32
;
1210 unsigned int r_type
;
1211 unsigned int r_symndx
;
1212 bfd_vma roff
= irel
->r_offset
;
1213 bfd_boolean local_ref
;
1214 struct elf_x86_link_hash_entry
*eh
;
1219 /* Addend for R_386_GOT32X relocations must be 0. */
1220 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1224 htab
= elf_x86_hash_table (link_info
, I386_ELF_DATA
);
1225 is_pic
= bfd_link_pic (link_info
);
1228 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1230 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1231 baseless
= (modrm
& 0xc7) == 0x5;
1233 if (baseless
&& is_pic
)
1235 /* For PIC, disallow R_386_GOT32X without a base register
1236 since we don't know what the GOT base is. */
1241 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1243 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1246 name
= h
->root
.root
.string
;
1249 /* xgettext:c-format */
1250 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1251 " register can not be used when making a shared object"),
1256 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1258 /* Convert to R_386_32 if PIC is false or there is no base
1260 to_reloc_32
= !is_pic
|| baseless
;
1262 eh
= elf_x86_hash_entry (h
);
1264 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1268 if (opcode
== 0x0ff)
1269 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1270 goto convert_branch
;
1272 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1273 "test %reg1, foo@GOT(%reg2)" and
1274 "binop foo@GOT[(%reg1)], %reg2". */
1278 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1279 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1281 /* Undefined weak symbol is only bound locally in executable
1282 and its reference is resolved as 0. */
1283 if (h
->root
.type
== bfd_link_hash_undefweak
1289 /* No direct branch to 0 for PIC. */
1293 goto convert_branch
;
1297 /* We can convert load of address 0 to R_386_32. */
1305 /* We have "call/jmp *foo@GOT[(%reg)]". */
1306 if ((h
->root
.type
== bfd_link_hash_defined
1307 || h
->root
.type
== bfd_link_hash_defweak
)
1310 /* The function is locally defined. */
1312 /* Convert R_386_GOT32X to R_386_PC32. */
1313 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1315 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1318 /* To support TLS optimization, always use addr32 prefix
1319 for "call *___tls_get_addr@GOT(%reg)". */
1320 if (eh
&& eh
->tls_get_addr
)
1323 nop_offset
= irel
->r_offset
- 2;
1327 nop
= link_info
->call_nop_byte
;
1328 if (link_info
->call_nop_as_suffix
)
1330 nop_offset
= roff
+ 3;
1331 irel
->r_offset
-= 1;
1334 nop_offset
= roff
- 2;
1339 /* Convert to "jmp foo nop". */
1342 nop_offset
= roff
+ 3;
1343 irel
->r_offset
-= 1;
1346 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1347 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1348 /* When converting to PC-relative relocation, we
1349 need to adjust addend by -4. */
1350 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1351 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1352 *r_type_p
= R_386_PC32
;
1358 /* We have "mov foo@GOT[(%re1g)], %reg2",
1359 "test %reg1, foo@GOT(%reg2)" and
1360 "binop foo@GOT[(%reg1)], %reg2".
1362 Avoid optimizing _DYNAMIC since ld.so may use its
1363 link-time address. */
1364 if (h
== htab
->elf
.hdynamic
)
1367 /* def_regular is set by an assignment in a linker script in
1368 bfd_elf_record_link_assignment. start_stop is set on
1369 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1373 || h
->root
.type
== bfd_link_hash_defined
1374 || h
->root
.type
== bfd_link_hash_defweak
)
1382 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1383 "mov $foo, %reg2" with R_386_32. */
1385 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1386 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1391 /* Convert "mov foo@GOT(%reg1), %reg2" to
1392 "lea foo@GOTOFF(%reg1), %reg2". */
1393 r_type
= R_386_GOTOFF
;
1399 /* Only R_386_32 is supported. */
1405 /* Convert "test %reg1, foo@GOT(%reg2)" to
1406 "test $foo, %reg1". */
1407 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1412 /* Convert "binop foo@GOT(%reg1), %reg2" to
1413 "binop $foo, %reg2". */
1415 | (modrm
& 0x38) >> 3
1419 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1423 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1424 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1433 /* Rename some of the generic section flags to better document how they
1435 #define check_relocs_failed sec_flg0
1437 /* Look through the relocs for a section during the first phase, and
1438 calculate needed space in the global offset table, procedure linkage
1439 table, and dynamic reloc sections. */
1442 elf_i386_check_relocs (bfd
*abfd
,
1443 struct bfd_link_info
*info
,
1445 const Elf_Internal_Rela
*relocs
)
1447 struct elf_x86_link_hash_table
*htab
;
1448 Elf_Internal_Shdr
*symtab_hdr
;
1449 struct elf_link_hash_entry
**sym_hashes
;
1450 const Elf_Internal_Rela
*rel
;
1451 const Elf_Internal_Rela
*rel_end
;
1454 bfd_boolean converted
;
1456 if (bfd_link_relocatable (info
))
1459 /* Don't do anything special with non-loaded, non-alloced sections.
1460 In particular, any relocs in such sections should not affect GOT
1461 and PLT reference counting (ie. we don't allow them to create GOT
1462 or PLT entries), there's no possibility or desire to optimize TLS
1463 relocs, and there's not much point in propagating relocs to shared
1464 libs that the dynamic linker won't relocate. */
1465 if ((sec
->flags
& SEC_ALLOC
) == 0)
1468 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
1471 sec
->check_relocs_failed
= 1;
1475 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1477 /* Get the section contents. */
1478 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1479 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1480 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1482 sec
->check_relocs_failed
= 1;
1486 symtab_hdr
= &elf_symtab_hdr (abfd
);
1487 sym_hashes
= elf_sym_hashes (abfd
);
1493 rel_end
= relocs
+ sec
->reloc_count
;
1494 for (rel
= relocs
; rel
< rel_end
; rel
++)
1496 unsigned int r_type
;
1497 unsigned int r_symndx
;
1498 struct elf_link_hash_entry
*h
;
1499 struct elf_x86_link_hash_entry
*eh
;
1500 Elf_Internal_Sym
*isym
;
1502 bfd_boolean size_reloc
;
1504 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1505 r_type
= ELF32_R_TYPE (rel
->r_info
);
1507 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1509 /* xgettext:c-format */
1510 _bfd_error_handler (_("%B: bad symbol index: %d"),
1515 if (r_symndx
< symtab_hdr
->sh_info
)
1517 /* A local symbol. */
1518 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1523 /* Check relocation against local STT_GNU_IFUNC symbol. */
1524 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1526 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1530 /* Fake a STT_GNU_IFUNC symbol. */
1531 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1533 h
->type
= STT_GNU_IFUNC
;
1536 h
->forced_local
= 1;
1537 h
->root
.type
= bfd_link_hash_defined
;
1545 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1546 while (h
->root
.type
== bfd_link_hash_indirect
1547 || h
->root
.type
== bfd_link_hash_warning
)
1548 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1551 eh
= (struct elf_x86_link_hash_entry
*) h
;
1554 if (r_type
== R_386_GOTOFF
)
1557 /* It is referenced by a non-shared object. */
1560 if (h
->type
== STT_GNU_IFUNC
)
1561 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1562 |= elf_gnu_symbol_ifunc
;
1565 if (r_type
== R_386_GOT32X
1566 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1568 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1569 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
1575 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
1576 symtab_hdr
, sym_hashes
,
1577 &r_type
, GOT_UNKNOWN
,
1578 rel
, rel_end
, h
, r_symndx
, FALSE
))
1584 htab
->tls_ld_or_ldm_got
.refcount
= 1;
1588 /* This symbol requires a procedure linkage table entry. We
1589 actually build the entry in adjust_dynamic_symbol,
1590 because this might be a case of linking PIC code which is
1591 never referenced by a dynamic object, in which case we
1592 don't need to generate a procedure linkage table entry
1595 /* If this is a local symbol, we resolve it directly without
1596 creating a procedure linkage table entry. */
1600 eh
->zero_undefweak
&= 0x2;
1602 h
->plt
.refcount
= 1;
1609 case R_386_TLS_IE_32
:
1611 case R_386_TLS_GOTIE
:
1612 if (!bfd_link_executable (info
))
1613 info
->flags
|= DF_STATIC_TLS
;
1619 case R_386_TLS_GOTDESC
:
1620 case R_386_TLS_DESC_CALL
:
1621 /* This symbol requires a global offset table entry. */
1623 int tls_type
, old_tls_type
;
1630 tls_type
= GOT_NORMAL
;
1632 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1633 case R_386_TLS_GOTDESC
:
1634 case R_386_TLS_DESC_CALL
:
1635 tls_type
= GOT_TLS_GDESC
; break;
1636 case R_386_TLS_IE_32
:
1637 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1638 tls_type
= GOT_TLS_IE_NEG
;
1640 /* If this is a GD->IE transition, we may use either of
1641 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1642 tls_type
= GOT_TLS_IE
;
1645 case R_386_TLS_GOTIE
:
1646 tls_type
= GOT_TLS_IE_POS
; break;
1651 h
->got
.refcount
= 1;
1652 old_tls_type
= elf_x86_hash_entry (h
)->tls_type
;
1656 bfd_signed_vma
*local_got_refcounts
;
1658 /* This is a global offset table entry for a local symbol. */
1659 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1660 if (local_got_refcounts
== NULL
)
1664 size
= symtab_hdr
->sh_info
;
1665 size
*= (sizeof (bfd_signed_vma
)
1666 + sizeof (bfd_vma
) + sizeof(char));
1667 local_got_refcounts
= (bfd_signed_vma
*)
1668 bfd_zalloc (abfd
, size
);
1669 if (local_got_refcounts
== NULL
)
1671 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1672 elf_x86_local_tlsdesc_gotent (abfd
)
1673 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1674 elf_x86_local_got_tls_type (abfd
)
1675 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1677 local_got_refcounts
[r_symndx
] = 1;
1678 old_tls_type
= elf_x86_local_got_tls_type (abfd
) [r_symndx
];
1681 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1682 tls_type
|= old_tls_type
;
1683 /* If a TLS symbol is accessed using IE at least once,
1684 there is no point to use dynamic model for it. */
1685 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1686 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1687 || (tls_type
& GOT_TLS_IE
) == 0))
1689 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1690 tls_type
= old_tls_type
;
1691 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1692 && GOT_TLS_GD_ANY_P (tls_type
))
1693 tls_type
|= old_tls_type
;
1697 name
= h
->root
.root
.string
;
1699 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1702 /* xgettext:c-format */
1703 (_("%B: `%s' accessed both as normal and "
1704 "thread local symbol"),
1706 bfd_set_error (bfd_error_bad_value
);
1711 if (old_tls_type
!= tls_type
)
1714 elf_x86_hash_entry (h
)->tls_type
= tls_type
;
1716 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1724 if (r_type
!= R_386_TLS_IE
)
1727 eh
->zero_undefweak
&= 0x2;
1732 case R_386_TLS_LE_32
:
1735 eh
->zero_undefweak
&= 0x2;
1736 if (bfd_link_executable (info
))
1738 info
->flags
|= DF_STATIC_TLS
;
1743 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
1744 eh
->zero_undefweak
|= 0x2;
1746 /* We are called after all symbols have been resolved. Only
1747 relocation against STT_GNU_IFUNC symbol must go through
1750 && (bfd_link_executable (info
)
1751 || h
->type
== STT_GNU_IFUNC
))
1753 bfd_boolean func_pointer_ref
= FALSE
;
1755 if (r_type
== R_386_PC32
)
1757 /* Since something like ".long foo - ." may be used
1758 as pointer, make sure that PLT is used if foo is
1759 a function defined in a shared library. */
1760 if ((sec
->flags
& SEC_CODE
) == 0)
1761 h
->pointer_equality_needed
= 1;
1762 else if (h
->type
== STT_GNU_IFUNC
1763 && bfd_link_pic (info
))
1766 /* xgettext:c-format */
1767 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
1768 abfd
, h
->root
.root
.string
);
1769 bfd_set_error (bfd_error_bad_value
);
1775 h
->pointer_equality_needed
= 1;
1776 /* R_386_32 can be resolved at run-time. */
1777 if (r_type
== R_386_32
1778 && (sec
->flags
& SEC_READONLY
) == 0)
1779 func_pointer_ref
= TRUE
;
1782 if (!func_pointer_ref
)
1784 /* If this reloc is in a read-only section, we might
1785 need a copy reloc. We can't check reliably at this
1786 stage whether the section is read-only, as input
1787 sections have not yet been mapped to output sections.
1788 Tentatively set the flag for now, and correct in
1789 adjust_dynamic_symbol. */
1792 /* We may need a .plt entry if the symbol is a function
1793 defined in a shared lib or is a function referenced
1794 from the code or read-only section. */
1796 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
1797 h
->plt
.refcount
= 1;
1803 if (NEED_DYNAMIC_RELOCATION_P (info
, h
, sec
, r_type
,
1806 struct elf_dyn_relocs
*p
;
1807 struct elf_dyn_relocs
**head
;
1809 /* We must copy these reloc types into the output file.
1810 Create a reloc section in dynobj and make room for
1814 sreloc
= _bfd_elf_make_dynamic_reloc_section
1815 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1821 /* If this is a global symbol, we count the number of
1822 relocations we need for this symbol. */
1825 head
= &eh
->dyn_relocs
;
1829 /* Track dynamic relocs needed for local syms too.
1830 We really need local syms available to do this
1835 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1840 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1844 vpp
= &elf_section_data (s
)->local_dynrel
;
1845 head
= (struct elf_dyn_relocs
**)vpp
;
1849 if (p
== NULL
|| p
->sec
!= sec
)
1851 bfd_size_type amt
= sizeof *p
;
1852 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1864 /* Count size relocation as PC-relative relocation. */
1865 if (r_type
== R_386_PC32
|| size_reloc
)
1870 /* This relocation describes the C++ object vtable hierarchy.
1871 Reconstruct it for later use during GC. */
1872 case R_386_GNU_VTINHERIT
:
1873 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1877 /* This relocation describes which C++ vtable entries are actually
1878 used. Record for later use during GC. */
1879 case R_386_GNU_VTENTRY
:
1880 BFD_ASSERT (h
!= NULL
);
1882 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1891 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1893 if (!converted
&& !info
->keep_memory
)
1897 /* Cache the section contents for elf_link_input_bfd if any
1898 load is converted or --no-keep-memory isn't used. */
1899 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1903 /* Cache relocations if any load is converted. */
1904 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
1905 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
1910 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1912 sec
->check_relocs_failed
= 1;
1916 /* Set the correct type for an x86 ELF section. We do this by the
1917 section name, which is a hack, but ought to work. */
1920 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
1921 Elf_Internal_Shdr
*hdr
,
1926 name
= bfd_get_section_name (abfd
, sec
);
1928 /* This is an ugly, but unfortunately necessary hack that is
1929 needed when producing EFI binaries on x86. It tells
1930 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1931 containing ELF relocation info. We need this hack in order to
1932 be able to generate ELF binaries that can be translated into
1933 EFI applications (which are essentially COFF objects). Those
1934 files contain a COFF ".reloc" section inside an ELFNN object,
1935 which would normally cause BFD to segfault because it would
1936 attempt to interpret this section as containing relocation
1937 entries for section "oc". With this hack enabled, ".reloc"
1938 will be treated as a normal data section, which will avoid the
1939 segfault. However, you won't be able to create an ELFNN binary
1940 with a section named "oc" that needs relocations, but that's
1941 the kind of ugly side-effects you get when detecting section
1942 types based on their names... In practice, this limitation is
1943 unlikely to bite. */
1944 if (strcmp (name
, ".reloc") == 0)
1945 hdr
->sh_type
= SHT_PROGBITS
;
1950 /* Return the relocation value for @tpoff relocation
1951 if STT_TLS virtual address is ADDRESS. */
1954 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
1956 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
1957 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
1958 bfd_vma static_tls_size
;
1960 /* If tls_sec is NULL, we should have signalled an error already. */
1961 if (htab
->tls_sec
== NULL
)
1964 /* Consider special static TLS alignment requirements. */
1965 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
1966 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
1969 /* Relocate an i386 ELF section. */
1972 elf_i386_relocate_section (bfd
*output_bfd
,
1973 struct bfd_link_info
*info
,
1975 asection
*input_section
,
1977 Elf_Internal_Rela
*relocs
,
1978 Elf_Internal_Sym
*local_syms
,
1979 asection
**local_sections
)
1981 struct elf_x86_link_hash_table
*htab
;
1982 Elf_Internal_Shdr
*symtab_hdr
;
1983 struct elf_link_hash_entry
**sym_hashes
;
1984 bfd_vma
*local_got_offsets
;
1985 bfd_vma
*local_tlsdesc_gotents
;
1986 Elf_Internal_Rela
*rel
;
1987 Elf_Internal_Rela
*wrel
;
1988 Elf_Internal_Rela
*relend
;
1989 bfd_boolean is_vxworks_tls
;
1990 unsigned plt_entry_size
;
1992 /* Skip if check_relocs failed. */
1993 if (input_section
->check_relocs_failed
)
1996 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
2000 BFD_ASSERT (is_x86_elf (input_bfd
, htab
));
2002 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2003 sym_hashes
= elf_sym_hashes (input_bfd
);
2004 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2005 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2006 /* We have to handle relocations in vxworks .tls_vars sections
2007 specially, because the dynamic loader is 'weird'. */
2008 is_vxworks_tls
= (htab
->target_os
== is_vxworks
2009 && bfd_link_pic (info
)
2010 && !strcmp (input_section
->output_section
->name
,
2013 _bfd_x86_elf_set_tls_module_base (info
);
2015 plt_entry_size
= htab
->plt
.plt_entry_size
;
2017 rel
= wrel
= relocs
;
2018 relend
= relocs
+ input_section
->reloc_count
;
2019 for (; rel
< relend
; wrel
++, rel
++)
2021 unsigned int r_type
, r_type_tls
;
2022 reloc_howto_type
*howto
;
2023 unsigned long r_symndx
;
2024 struct elf_link_hash_entry
*h
;
2025 struct elf_x86_link_hash_entry
*eh
;
2026 Elf_Internal_Sym
*sym
;
2028 bfd_vma off
, offplt
, plt_offset
;
2030 bfd_boolean unresolved_reloc
;
2031 bfd_reloc_status_type r
;
2035 asection
*resolved_plt
;
2036 bfd_boolean resolved_to_zero
;
2037 bfd_boolean relative_reloc
;
2039 r_type
= ELF32_R_TYPE (rel
->r_info
);
2040 if (r_type
== R_386_GNU_VTINHERIT
2041 || r_type
== R_386_GNU_VTENTRY
)
2048 if ((indx
= r_type
) >= R_386_standard
2049 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2050 >= R_386_ext
- R_386_standard
)
2051 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2052 >= R_386_ext2
- R_386_ext
))
2053 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2055 howto
= elf_howto_table
+ indx
;
2057 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2061 unresolved_reloc
= FALSE
;
2062 if (r_symndx
< symtab_hdr
->sh_info
)
2064 sym
= local_syms
+ r_symndx
;
2065 sec
= local_sections
[r_symndx
];
2066 relocation
= (sec
->output_section
->vma
2067 + sec
->output_offset
2069 st_size
= sym
->st_size
;
2071 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2072 && ((sec
->flags
& SEC_MERGE
) != 0
2073 || (bfd_link_relocatable (info
)
2074 && sec
->output_offset
!= 0)))
2077 bfd_byte
*where
= contents
+ rel
->r_offset
;
2079 switch (howto
->size
)
2082 addend
= bfd_get_8 (input_bfd
, where
);
2083 if (howto
->pc_relative
)
2085 addend
= (addend
^ 0x80) - 0x80;
2090 addend
= bfd_get_16 (input_bfd
, where
);
2091 if (howto
->pc_relative
)
2093 addend
= (addend
^ 0x8000) - 0x8000;
2098 addend
= bfd_get_32 (input_bfd
, where
);
2099 if (howto
->pc_relative
)
2101 addend
= (addend
^ 0x80000000) - 0x80000000;
2109 if (bfd_link_relocatable (info
))
2110 addend
+= sec
->output_offset
;
2113 asection
*msec
= sec
;
2114 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2116 addend
-= relocation
;
2117 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2120 switch (howto
->size
)
2123 /* FIXME: overflow checks. */
2124 if (howto
->pc_relative
)
2126 bfd_put_8 (input_bfd
, addend
, where
);
2129 if (howto
->pc_relative
)
2131 bfd_put_16 (input_bfd
, addend
, where
);
2134 if (howto
->pc_relative
)
2136 bfd_put_32 (input_bfd
, addend
, where
);
2140 else if (!bfd_link_relocatable (info
)
2141 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2143 /* Relocate against local STT_GNU_IFUNC symbol. */
2144 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
, rel
,
2149 /* Set STT_GNU_IFUNC symbol value. */
2150 h
->root
.u
.def
.value
= sym
->st_value
;
2151 h
->root
.u
.def
.section
= sec
;
2156 bfd_boolean warned ATTRIBUTE_UNUSED
;
2157 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2159 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2160 r_symndx
, symtab_hdr
, sym_hashes
,
2162 unresolved_reloc
, warned
, ignored
);
2166 if (sec
!= NULL
&& discarded_section (sec
))
2168 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2169 contents
+ rel
->r_offset
);
2170 wrel
->r_offset
= rel
->r_offset
;
2174 /* For ld -r, remove relocations in debug sections against
2175 sections defined in discarded sections. Not done for
2176 eh_frame editing code expects to be present. */
2177 if (bfd_link_relocatable (info
)
2178 && (input_section
->flags
& SEC_DEBUGGING
))
2184 if (bfd_link_relocatable (info
))
2191 eh
= (struct elf_x86_link_hash_entry
*) h
;
2193 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2194 it here if it is defined in a non-shared object. */
2196 && h
->type
== STT_GNU_IFUNC
2199 asection
*gotplt
, *base_got
;
2203 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2205 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2206 sections because such sections are not SEC_ALLOC and
2207 thus ld.so will not process them. */
2208 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2213 /* STT_GNU_IFUNC symbol must go through PLT. */
2214 if (htab
->elf
.splt
!= NULL
)
2216 if (htab
->plt_second
!= NULL
)
2218 resolved_plt
= htab
->plt_second
;
2219 plt_offset
= eh
->plt_second
.offset
;
2223 resolved_plt
= htab
->elf
.splt
;
2224 plt_offset
= h
->plt
.offset
;
2226 gotplt
= htab
->elf
.sgotplt
;
2230 resolved_plt
= htab
->elf
.iplt
;
2231 plt_offset
= h
->plt
.offset
;
2232 gotplt
= htab
->elf
.igotplt
;
2242 base_got
= htab
->elf
.sgot
;
2243 off
= h
->got
.offset
;
2245 if (base_got
== NULL
)
2248 if (off
== (bfd_vma
) -1)
2250 /* We can't use h->got.offset here to save state, or
2251 even just remember the offset, as finish_dynamic_symbol
2252 would use that as offset into .got. */
2254 if (h
->plt
.offset
== (bfd_vma
) -1)
2257 if (htab
->elf
.splt
!= NULL
)
2259 plt_index
= (h
->plt
.offset
/ plt_entry_size
2260 - htab
->plt
.has_plt0
);
2261 off
= (plt_index
+ 3) * 4;
2262 base_got
= htab
->elf
.sgotplt
;
2266 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2267 off
= plt_index
* 4;
2268 base_got
= htab
->elf
.igotplt
;
2271 if (h
->dynindx
== -1
2275 /* This references the local defitionion. We must
2276 initialize this entry in the global offset table.
2277 Since the offset must always be a multiple of 8,
2278 we use the least significant bit to record
2279 whether we have initialized it already.
2281 When doing a dynamic link, we create a .rela.got
2282 relocation entry to initialize the value. This
2283 is done in the finish_dynamic_symbol routine. */
2288 bfd_put_32 (output_bfd
, relocation
,
2289 base_got
->contents
+ off
);
2297 relocation
= (base_got
->output_section
->vma
2298 + base_got
->output_offset
+ off
2299 - gotplt
->output_section
->vma
2300 - gotplt
->output_offset
);
2302 if (rel
->r_offset
> 1
2303 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
2304 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
2306 if (bfd_link_pic (info
))
2307 goto disallow_got32
;
2309 /* Add the GOT base if there is no base register. */
2310 relocation
+= (gotplt
->output_section
->vma
2311 + gotplt
->output_offset
);
2313 else if (htab
->elf
.splt
== NULL
)
2315 /* Adjust for static executables. */
2316 relocation
+= gotplt
->output_offset
;
2322 if (h
->plt
.offset
== (bfd_vma
) -1)
2324 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2325 if (r_type
== R_386_32
2326 && (input_section
->flags
& SEC_CODE
) == 0)
2327 goto do_ifunc_pointer
;
2328 goto bad_ifunc_reloc
;
2331 relocation
= (resolved_plt
->output_section
->vma
2332 + resolved_plt
->output_offset
+ plt_offset
);
2338 if (h
->root
.root
.string
)
2339 name
= h
->root
.root
.string
;
2341 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2344 /* xgettext:c-format */
2345 (_("%B: relocation %s against STT_GNU_IFUNC "
2346 "symbol `%s' isn't supported"), input_bfd
,
2348 bfd_set_error (bfd_error_bad_value
);
2352 /* Generate dynamic relcoation only when there is a
2353 non-GOT reference in a shared object. */
2354 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2355 || h
->plt
.offset
== (bfd_vma
) -1)
2357 Elf_Internal_Rela outrel
;
2362 /* Need a dynamic relocation to get the real function
2364 offset
= _bfd_elf_section_offset (output_bfd
,
2368 if (offset
== (bfd_vma
) -1
2369 || offset
== (bfd_vma
) -2)
2372 outrel
.r_offset
= (input_section
->output_section
->vma
2373 + input_section
->output_offset
2376 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2378 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
2379 h
->root
.root
.string
,
2380 h
->root
.u
.def
.section
->owner
);
2382 /* This symbol is resolved locally. */
2383 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
2384 bfd_put_32 (output_bfd
,
2385 (h
->root
.u
.def
.value
2386 + h
->root
.u
.def
.section
->output_section
->vma
2387 + h
->root
.u
.def
.section
->output_offset
),
2391 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2393 /* Dynamic relocations are stored in
2394 1. .rel.ifunc section in PIC object.
2395 2. .rel.got section in dynamic executable.
2396 3. .rel.iplt section in static executable. */
2397 if (bfd_link_pic (info
))
2398 sreloc
= htab
->elf
.irelifunc
;
2399 else if (htab
->elf
.splt
!= NULL
)
2400 sreloc
= htab
->elf
.srelgot
;
2402 sreloc
= htab
->elf
.irelplt
;
2403 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2405 /* If this reloc is against an external symbol, we
2406 do not want to fiddle with the addend. Otherwise,
2407 we need to include the symbol value so that it
2408 becomes an addend for the dynamic reloc. For an
2409 internal symbol, we have updated addend. */
2418 relocation
-= (gotplt
->output_section
->vma
2419 + gotplt
->output_offset
);
2424 resolved_to_zero
= (eh
!= NULL
2425 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2430 /* Avoid optimizing _DYNAMIC since ld.so may use its
2431 link-time address. */
2432 if (h
== htab
->elf
.hdynamic
)
2435 if (bfd_link_pic (info
))
2437 /* It is OK to convert mov to lea and convert indirect
2438 branch to direct branch. It is OK to convert adc,
2439 add, and, cmp, or, sbb, sub, test, xor only when PIC
2441 unsigned int opcode
, addend
;
2442 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2445 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2446 if (opcode
!= 0x8b && opcode
!= 0xff)
2450 /* Resolve "mov GOT[(%reg)], %reg",
2451 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
2452 and "binop foo@GOT[(%reg)], %reg". */
2454 || (h
->plt
.offset
== (bfd_vma
) -1
2455 && h
->got
.offset
== (bfd_vma
) -1)
2456 || htab
->elf
.sgotplt
== NULL
)
2459 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
2460 + htab
->elf
.sgotplt
->output_offset
);
2462 /* It is relative to .got.plt section. */
2463 if (h
->got
.offset
!= (bfd_vma
) -1)
2464 /* Use GOT entry. Mask off the least significant bit in
2465 GOT offset which may be set by R_386_GOT32 processing
2467 relocation
= (htab
->elf
.sgot
->output_section
->vma
2468 + htab
->elf
.sgot
->output_offset
2469 + (h
->got
.offset
& ~1) - offplt
);
2471 /* Use GOTPLT entry. */
2472 relocation
= (h
->plt
.offset
/ plt_entry_size
2473 - htab
->plt
.has_plt0
+ 3) * 4;
2475 if (!bfd_link_pic (info
))
2477 /* If not PIC, add the .got.plt section address for
2478 baseless addressing. */
2480 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2481 if ((modrm
& 0xc7) == 0x5)
2482 relocation
+= offplt
;
2485 unresolved_reloc
= FALSE
;
2490 /* Relocation is to the entry for this symbol in the global
2492 if (htab
->elf
.sgot
== NULL
)
2495 relative_reloc
= FALSE
;
2498 off
= h
->got
.offset
;
2499 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2501 /* We must initialize this entry in the global offset
2502 table. Since the offset must always be a multiple
2503 of 4, we use the least significant bit to record
2504 whether we have initialized it already.
2506 When doing a dynamic link, we create a .rel.got
2507 relocation entry to initialize the value. This
2508 is done in the finish_dynamic_symbol routine. */
2513 bfd_put_32 (output_bfd
, relocation
,
2514 htab
->elf
.sgot
->contents
+ off
);
2517 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2519 /* PR ld/21402: If this symbol isn't dynamic
2520 in PIC, generate R_386_RELATIVE here. */
2521 eh
->no_finish_dynamic_symbol
= 1;
2522 relative_reloc
= TRUE
;
2527 unresolved_reloc
= FALSE
;
2531 if (local_got_offsets
== NULL
)
2534 off
= local_got_offsets
[r_symndx
];
2536 /* The offset must always be a multiple of 4. We use
2537 the least significant bit to record whether we have
2538 already generated the necessary reloc. */
2543 bfd_put_32 (output_bfd
, relocation
,
2544 htab
->elf
.sgot
->contents
+ off
);
2545 local_got_offsets
[r_symndx
] |= 1;
2547 if (bfd_link_pic (info
))
2548 relative_reloc
= TRUE
;
2555 Elf_Internal_Rela outrel
;
2557 s
= htab
->elf
.srelgot
;
2561 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2562 + htab
->elf
.sgot
->output_offset
2564 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2565 elf_append_rel (output_bfd
, s
, &outrel
);
2568 if (off
>= (bfd_vma
) -2)
2571 relocation
= (htab
->elf
.sgot
->output_section
->vma
2572 + htab
->elf
.sgot
->output_offset
+ off
);
2573 if (rel
->r_offset
> 1
2574 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
2575 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
2577 if (bfd_link_pic (info
))
2579 /* For PIC, disallow R_386_GOT32 without a base
2580 register, except for "lea foo@GOT, %reg", since
2581 we don't know what the GOT base is. */
2585 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
2586 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2589 name
= h
->root
.root
.string
;
2592 /* xgettext:c-format */
2593 (_("%B: direct GOT relocation %s against `%s'"
2594 " without base register can not be used"
2595 " when making a shared object"),
2596 input_bfd
, howto
->name
, name
);
2597 bfd_set_error (bfd_error_bad_value
);
2603 /* Subtract the .got.plt section address only with a base
2605 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
2606 + htab
->elf
.sgotplt
->output_offset
);
2612 /* Relocation is relative to the start of the global offset
2615 /* Check to make sure it isn't a protected function or data
2616 symbol for shared library since it may not be local when
2617 used as function address or with copy relocation. We also
2618 need to make sure that a symbol is referenced locally. */
2619 if (!bfd_link_executable (info
) && h
)
2621 if (!h
->def_regular
)
2625 switch (ELF_ST_VISIBILITY (h
->other
))
2628 v
= _("hidden symbol");
2631 v
= _("internal symbol");
2634 v
= _("protected symbol");
2642 /* xgettext:c-format */
2643 (_("%B: relocation R_386_GOTOFF against undefined %s"
2644 " `%s' can not be used when making a shared object"),
2645 input_bfd
, v
, h
->root
.root
.string
);
2646 bfd_set_error (bfd_error_bad_value
);
2649 else if (!SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2650 && (h
->type
== STT_FUNC
2651 || h
->type
== STT_OBJECT
)
2652 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2655 /* xgettext:c-format */
2656 (_("%B: relocation R_386_GOTOFF against protected %s"
2657 " `%s' can not be used when making a shared object"),
2659 h
->type
== STT_FUNC
? "function" : "data",
2660 h
->root
.root
.string
);
2661 bfd_set_error (bfd_error_bad_value
);
2666 /* Note that sgot is not involved in this
2667 calculation. We always want the start of .got.plt. If we
2668 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2669 permitted by the ABI, we might have to change this
2671 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2672 + htab
->elf
.sgotplt
->output_offset
;
2676 /* Use global offset table as symbol value. */
2677 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2678 + htab
->elf
.sgotplt
->output_offset
;
2679 unresolved_reloc
= FALSE
;
2683 /* Relocation is to the entry for this symbol in the
2684 procedure linkage table. */
2686 /* Resolve a PLT32 reloc against a local symbol directly,
2687 without using the procedure linkage table. */
2691 if ((h
->plt
.offset
== (bfd_vma
) -1
2692 && eh
->plt_got
.offset
== (bfd_vma
) -1)
2693 || htab
->elf
.splt
== NULL
)
2695 /* We didn't make a PLT entry for this symbol. This
2696 happens when statically linking PIC code, or when
2697 using -Bsymbolic. */
2701 if (h
->plt
.offset
!= (bfd_vma
) -1)
2703 if (htab
->plt_second
!= NULL
)
2705 resolved_plt
= htab
->plt_second
;
2706 plt_offset
= eh
->plt_second
.offset
;
2710 resolved_plt
= htab
->elf
.splt
;
2711 plt_offset
= h
->plt
.offset
;
2716 resolved_plt
= htab
->plt_got
;
2717 plt_offset
= eh
->plt_got
.offset
;
2720 relocation
= (resolved_plt
->output_section
->vma
2721 + resolved_plt
->output_offset
2723 unresolved_reloc
= FALSE
;
2727 /* Set to symbol size. */
2728 relocation
= st_size
;
2733 if ((input_section
->flags
& SEC_ALLOC
) == 0
2737 if (GENERATE_DYNAMIC_RELOCATION_P (info
, eh
, r_type
,
2738 FALSE
, resolved_to_zero
,
2739 (r_type
== R_386_PC32
)))
2741 Elf_Internal_Rela outrel
;
2742 bfd_boolean skip
, relocate
;
2745 /* When generating a shared object, these relocations
2746 are copied into the output file to be resolved at run
2753 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2755 if (outrel
.r_offset
== (bfd_vma
) -1)
2757 else if (outrel
.r_offset
== (bfd_vma
) -2)
2758 skip
= TRUE
, relocate
= TRUE
;
2759 outrel
.r_offset
+= (input_section
->output_section
->vma
2760 + input_section
->output_offset
);
2763 memset (&outrel
, 0, sizeof outrel
);
2764 else if (COPY_INPUT_RELOC_P (info
, h
, r_type
))
2765 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2768 /* This symbol is local, or marked to become local. */
2770 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2773 sreloc
= elf_section_data (input_section
)->sreloc
;
2775 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
2777 r
= bfd_reloc_notsupported
;
2778 goto check_relocation_error
;
2781 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2783 /* If this reloc is against an external symbol, we do
2784 not want to fiddle with the addend. Otherwise, we
2785 need to include the symbol value so that it becomes
2786 an addend for the dynamic reloc. */
2793 if (!bfd_link_executable (info
))
2795 Elf_Internal_Rela outrel
;
2798 outrel
.r_offset
= rel
->r_offset
2799 + input_section
->output_section
->vma
2800 + input_section
->output_offset
;
2801 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2802 sreloc
= elf_section_data (input_section
)->sreloc
;
2805 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2810 case R_386_TLS_GOTDESC
:
2811 case R_386_TLS_DESC_CALL
:
2812 case R_386_TLS_IE_32
:
2813 case R_386_TLS_GOTIE
:
2814 tls_type
= GOT_UNKNOWN
;
2815 if (h
== NULL
&& local_got_offsets
)
2816 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
2818 tls_type
= elf_x86_hash_entry(h
)->tls_type
;
2819 if (tls_type
== GOT_TLS_IE
)
2820 tls_type
= GOT_TLS_IE_NEG
;
2822 r_type_tls
= r_type
;
2823 if (! elf_i386_tls_transition (info
, input_bfd
,
2824 input_section
, contents
,
2825 symtab_hdr
, sym_hashes
,
2826 &r_type_tls
, tls_type
, rel
,
2827 relend
, h
, r_symndx
, TRUE
))
2830 if (r_type_tls
== R_386_TLS_LE_32
)
2832 BFD_ASSERT (! unresolved_reloc
);
2833 if (r_type
== R_386_TLS_GD
)
2838 /* GD->LE transition. */
2839 type
= *(contents
+ rel
->r_offset
- 2);
2843 leal foo@tlsgd(,%ebx,1), %eax
2844 call ___tls_get_addr@PLT
2847 subl $foo@tpoff, %eax
2848 (6 byte form of subl). */
2849 roff
= rel
->r_offset
+ 5;
2854 leal foo@tlsgd(%ebx), %eax
2855 call ___tls_get_addr@PLT
2858 leal foo@tlsgd(%reg), %eax
2859 call *___tls_get_addr@GOT(%reg)
2860 which may be converted to
2861 addr32 call ___tls_get_addr
2863 movl %gs:0, %eax; subl $foo@tpoff, %eax
2864 (6 byte form of subl). */
2865 roff
= rel
->r_offset
+ 6;
2867 memcpy (contents
+ roff
- 8,
2868 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2869 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
2871 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
2876 else if (r_type
== R_386_TLS_GOTDESC
)
2878 /* GDesc -> LE transition.
2879 It's originally something like:
2880 leal x@tlsdesc(%ebx), %eax
2884 Registers other than %eax may be set up here. */
2889 roff
= rel
->r_offset
;
2890 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
2892 /* Now modify the instruction as appropriate. */
2893 /* aoliva FIXME: remove the above and xor the byte
2895 bfd_put_8 (output_bfd
, val
^ 0x86,
2896 contents
+ roff
- 1);
2897 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
2901 else if (r_type
== R_386_TLS_DESC_CALL
)
2903 /* GDesc -> LE transition.
2911 roff
= rel
->r_offset
;
2912 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
2913 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
2916 else if (r_type
== R_386_TLS_IE
)
2920 /* IE->LE transition:
2921 Originally it can be one of:
2929 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2932 /* movl foo, %eax. */
2933 bfd_put_8 (output_bfd
, 0xb8,
2934 contents
+ rel
->r_offset
- 1);
2940 type
= bfd_get_8 (input_bfd
,
2941 contents
+ rel
->r_offset
- 2);
2946 bfd_put_8 (output_bfd
, 0xc7,
2947 contents
+ rel
->r_offset
- 2);
2948 bfd_put_8 (output_bfd
,
2949 0xc0 | ((val
>> 3) & 7),
2950 contents
+ rel
->r_offset
- 1);
2954 bfd_put_8 (output_bfd
, 0x81,
2955 contents
+ rel
->r_offset
- 2);
2956 bfd_put_8 (output_bfd
,
2957 0xc0 | ((val
>> 3) & 7),
2958 contents
+ rel
->r_offset
- 1);
2965 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
2966 contents
+ rel
->r_offset
);
2971 unsigned int val
, type
;
2973 /* {IE_32,GOTIE}->LE transition:
2974 Originally it can be one of:
2975 subl foo(%reg1), %reg2
2976 movl foo(%reg1), %reg2
2977 addl foo(%reg1), %reg2
2980 movl $foo, %reg2 (6 byte form)
2981 addl $foo, %reg2. */
2982 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2983 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2987 bfd_put_8 (output_bfd
, 0xc7,
2988 contents
+ rel
->r_offset
- 2);
2989 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2990 contents
+ rel
->r_offset
- 1);
2992 else if (type
== 0x2b)
2995 bfd_put_8 (output_bfd
, 0x81,
2996 contents
+ rel
->r_offset
- 2);
2997 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2998 contents
+ rel
->r_offset
- 1);
3000 else if (type
== 0x03)
3003 bfd_put_8 (output_bfd
, 0x81,
3004 contents
+ rel
->r_offset
- 2);
3005 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3006 contents
+ rel
->r_offset
- 1);
3010 if (r_type
== R_386_TLS_GOTIE
)
3011 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3012 contents
+ rel
->r_offset
);
3014 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3015 contents
+ rel
->r_offset
);
3020 if (htab
->elf
.sgot
== NULL
)
3025 off
= h
->got
.offset
;
3026 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3030 if (local_got_offsets
== NULL
)
3033 off
= local_got_offsets
[r_symndx
];
3034 offplt
= local_tlsdesc_gotents
[r_symndx
];
3041 Elf_Internal_Rela outrel
;
3045 if (htab
->elf
.srelgot
== NULL
)
3048 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3050 if (GOT_TLS_GDESC_P (tls_type
))
3053 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3054 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3055 <= htab
->elf
.sgotplt
->size
);
3056 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3057 + htab
->elf
.sgotplt
->output_offset
3059 + htab
->sgotplt_jump_table_size
);
3060 sreloc
= htab
->elf
.srelplt
;
3061 loc
= sreloc
->contents
;
3062 loc
+= (htab
->next_tls_desc_index
++
3063 * sizeof (Elf32_External_Rel
));
3064 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3065 <= sreloc
->contents
+ sreloc
->size
);
3066 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3069 BFD_ASSERT (! unresolved_reloc
);
3070 bfd_put_32 (output_bfd
,
3071 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3072 htab
->elf
.sgotplt
->contents
+ offplt
3073 + htab
->sgotplt_jump_table_size
+ 4);
3077 bfd_put_32 (output_bfd
, 0,
3078 htab
->elf
.sgotplt
->contents
+ offplt
3079 + htab
->sgotplt_jump_table_size
+ 4);
3083 sreloc
= htab
->elf
.srelgot
;
3085 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3086 + htab
->elf
.sgot
->output_offset
+ off
);
3088 if (GOT_TLS_GD_P (tls_type
))
3089 dr_type
= R_386_TLS_DTPMOD32
;
3090 else if (GOT_TLS_GDESC_P (tls_type
))
3092 else if (tls_type
== GOT_TLS_IE_POS
)
3093 dr_type
= R_386_TLS_TPOFF
;
3095 dr_type
= R_386_TLS_TPOFF32
;
3097 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3098 bfd_put_32 (output_bfd
,
3099 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3100 htab
->elf
.sgot
->contents
+ off
);
3101 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3102 bfd_put_32 (output_bfd
,
3103 _bfd_x86_elf_dtpoff_base (info
) - relocation
,
3104 htab
->elf
.sgot
->contents
+ off
);
3105 else if (dr_type
!= R_386_TLS_DESC
)
3106 bfd_put_32 (output_bfd
, 0,
3107 htab
->elf
.sgot
->contents
+ off
);
3108 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3110 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3112 if (GOT_TLS_GD_P (tls_type
))
3116 BFD_ASSERT (! unresolved_reloc
);
3117 bfd_put_32 (output_bfd
,
3118 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3119 htab
->elf
.sgot
->contents
+ off
+ 4);
3123 bfd_put_32 (output_bfd
, 0,
3124 htab
->elf
.sgot
->contents
+ off
+ 4);
3125 outrel
.r_info
= ELF32_R_INFO (indx
,
3126 R_386_TLS_DTPOFF32
);
3127 outrel
.r_offset
+= 4;
3128 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3131 else if (tls_type
== GOT_TLS_IE_BOTH
)
3133 bfd_put_32 (output_bfd
,
3135 ? relocation
- _bfd_x86_elf_dtpoff_base (info
)
3137 htab
->elf
.sgot
->contents
+ off
+ 4);
3138 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3139 outrel
.r_offset
+= 4;
3140 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3147 local_got_offsets
[r_symndx
] |= 1;
3150 if (off
>= (bfd_vma
) -2
3151 && ! GOT_TLS_GDESC_P (tls_type
))
3153 if (r_type_tls
== R_386_TLS_GOTDESC
3154 || r_type_tls
== R_386_TLS_DESC_CALL
)
3156 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3157 unresolved_reloc
= FALSE
;
3159 else if (r_type_tls
== r_type
)
3161 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3162 + htab
->elf
.sgotplt
->output_offset
;
3163 relocation
= htab
->elf
.sgot
->output_section
->vma
3164 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3165 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3166 && tls_type
== GOT_TLS_IE_BOTH
)
3168 if (r_type
== R_386_TLS_IE
)
3169 relocation
+= g_o_t
;
3170 unresolved_reloc
= FALSE
;
3172 else if (r_type
== R_386_TLS_GD
)
3174 unsigned int val
, type
;
3177 /* GD->IE transition. */
3178 type
= *(contents
+ rel
->r_offset
- 2);
3179 val
= *(contents
+ rel
->r_offset
- 1);
3183 leal foo@tlsgd(,%ebx,1), %eax
3184 call ___tls_get_addr@PLT
3187 subl $foo@gottpoff(%ebx), %eax. */
3189 roff
= rel
->r_offset
- 3;
3194 leal foo@tlsgd(%ebx), %eax
3195 call ___tls_get_addr@PLT
3198 leal foo@tlsgd(%reg), %eax
3199 call *___tls_get_addr@GOT(%reg)
3200 which may be converted to
3201 addr32 call ___tls_get_addr
3204 subl $foo@gottpoff(%reg), %eax. */
3205 roff
= rel
->r_offset
- 2;
3207 memcpy (contents
+ roff
,
3208 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3209 contents
[roff
+ 7] = 0x80 | (val
& 7);
3210 /* If foo is used only with foo@gotntpoff(%reg) and
3211 foo@indntpoff, but not with foo@gottpoff(%reg), change
3212 subl $foo@gottpoff(%reg), %eax
3214 addl $foo@gotntpoff(%reg), %eax. */
3215 if (tls_type
== GOT_TLS_IE_POS
)
3216 contents
[roff
+ 6] = 0x03;
3217 bfd_put_32 (output_bfd
,
3218 htab
->elf
.sgot
->output_section
->vma
3219 + htab
->elf
.sgot
->output_offset
+ off
3220 - htab
->elf
.sgotplt
->output_section
->vma
3221 - htab
->elf
.sgotplt
->output_offset
,
3222 contents
+ roff
+ 8);
3223 /* Skip R_386_PLT32 and R_386_GOT32X. */
3228 else if (r_type
== R_386_TLS_GOTDESC
)
3230 /* GDesc -> IE transition.
3231 It's originally something like:
3232 leal x@tlsdesc(%ebx), %eax
3235 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3237 movl x@gottpoff(%ebx), %eax # before negl %eax
3239 Registers other than %eax may be set up here. */
3243 /* First, make sure it's a leal adding ebx to a 32-bit
3244 offset into any register, although it's probably
3245 almost always going to be eax. */
3246 roff
= rel
->r_offset
;
3248 /* Now modify the instruction as appropriate. */
3249 /* To turn a leal into a movl in the form we use it, it
3250 suffices to change the first byte from 0x8d to 0x8b.
3251 aoliva FIXME: should we decide to keep the leal, all
3252 we have to do is remove the statement below, and
3253 adjust the relaxation of R_386_TLS_DESC_CALL. */
3254 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3256 if (tls_type
== GOT_TLS_IE_BOTH
)
3259 bfd_put_32 (output_bfd
,
3260 htab
->elf
.sgot
->output_section
->vma
3261 + htab
->elf
.sgot
->output_offset
+ off
3262 - htab
->elf
.sgotplt
->output_section
->vma
3263 - htab
->elf
.sgotplt
->output_offset
,
3267 else if (r_type
== R_386_TLS_DESC_CALL
)
3269 /* GDesc -> IE transition.
3277 depending on how we transformed the TLS_GOTDESC above.
3282 roff
= rel
->r_offset
;
3284 /* Now modify the instruction as appropriate. */
3285 if (tls_type
!= GOT_TLS_IE_NEG
)
3288 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3289 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3294 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3295 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3305 if (! elf_i386_tls_transition (info
, input_bfd
,
3306 input_section
, contents
,
3307 symtab_hdr
, sym_hashes
,
3308 &r_type
, GOT_UNKNOWN
, rel
,
3309 relend
, h
, r_symndx
, TRUE
))
3312 if (r_type
!= R_386_TLS_LDM
)
3314 /* LD->LE transition. Change
3315 leal foo@tlsldm(%ebx) %eax
3316 call ___tls_get_addr@PLT
3320 leal 0(%esi,1), %esi
3322 leal foo@tlsldm(%reg) %eax
3323 call *___tls_get_addr@GOT(%reg)
3324 which may be converted to
3325 addr32 call ___tls_get_addr
3328 leal 0(%esi), %esi */
3329 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3330 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
3331 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
3332 memcpy (contents
+ rel
->r_offset
- 2,
3333 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3335 memcpy (contents
+ rel
->r_offset
- 2,
3336 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3337 /* Skip R_386_PC32/R_386_PLT32. */
3343 if (htab
->elf
.sgot
== NULL
)
3346 off
= htab
->tls_ld_or_ldm_got
.offset
;
3351 Elf_Internal_Rela outrel
;
3353 if (htab
->elf
.srelgot
== NULL
)
3356 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3357 + htab
->elf
.sgot
->output_offset
+ off
);
3359 bfd_put_32 (output_bfd
, 0,
3360 htab
->elf
.sgot
->contents
+ off
);
3361 bfd_put_32 (output_bfd
, 0,
3362 htab
->elf
.sgot
->contents
+ off
+ 4);
3363 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3364 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
3365 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3367 relocation
= htab
->elf
.sgot
->output_section
->vma
3368 + htab
->elf
.sgot
->output_offset
+ off
3369 - htab
->elf
.sgotplt
->output_section
->vma
3370 - htab
->elf
.sgotplt
->output_offset
;
3371 unresolved_reloc
= FALSE
;
3374 case R_386_TLS_LDO_32
:
3375 if (!bfd_link_executable (info
)
3376 || (input_section
->flags
& SEC_CODE
) == 0)
3377 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3379 /* When converting LDO to LE, we must negate. */
3380 relocation
= -elf_i386_tpoff (info
, relocation
);
3383 case R_386_TLS_LE_32
:
3385 if (!bfd_link_executable (info
))
3387 Elf_Internal_Rela outrel
;
3390 outrel
.r_offset
= rel
->r_offset
3391 + input_section
->output_section
->vma
3392 + input_section
->output_offset
;
3393 if (h
!= NULL
&& h
->dynindx
!= -1)
3397 if (r_type
== R_386_TLS_LE_32
)
3398 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3400 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3401 sreloc
= elf_section_data (input_section
)->sreloc
;
3404 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3407 else if (r_type
== R_386_TLS_LE_32
)
3408 relocation
= _bfd_x86_elf_dtpoff_base (info
) - relocation
;
3410 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3412 else if (r_type
== R_386_TLS_LE_32
)
3413 relocation
= elf_i386_tpoff (info
, relocation
);
3415 relocation
= -elf_i386_tpoff (info
, relocation
);
3422 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3423 because such sections are not SEC_ALLOC and thus ld.so will
3424 not process them. */
3425 if (unresolved_reloc
3426 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3428 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3429 rel
->r_offset
) != (bfd_vma
) -1)
3432 /* xgettext:c-format */
3433 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3438 h
->root
.root
.string
);
3443 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3444 contents
, rel
->r_offset
,
3447 check_relocation_error
:
3448 if (r
!= bfd_reloc_ok
)
3453 name
= h
->root
.root
.string
;
3456 name
= bfd_elf_string_from_elf_section (input_bfd
,
3457 symtab_hdr
->sh_link
,
3462 name
= bfd_section_name (input_bfd
, sec
);
3465 if (r
== bfd_reloc_overflow
)
3466 (*info
->callbacks
->reloc_overflow
)
3467 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3468 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3472 /* xgettext:c-format */
3473 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3474 input_bfd
, input_section
,
3475 rel
->r_offset
, name
, (int) r
);
3486 Elf_Internal_Shdr
*rel_hdr
;
3487 size_t deleted
= rel
- wrel
;
3489 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3490 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3491 if (rel_hdr
->sh_size
== 0)
3493 /* It is too late to remove an empty reloc section. Leave
3495 ??? What is wrong with an empty section??? */
3496 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3499 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3500 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3501 input_section
->reloc_count
-= deleted
;
3507 /* Finish up dynamic symbol handling. We set the contents of various
3508 dynamic sections here. */
3511 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3512 struct bfd_link_info
*info
,
3513 struct elf_link_hash_entry
*h
,
3514 Elf_Internal_Sym
*sym
)
3516 struct elf_x86_link_hash_table
*htab
;
3517 unsigned plt_entry_size
;
3518 struct elf_x86_link_hash_entry
*eh
;
3519 bfd_boolean local_undefweak
;
3520 bfd_boolean use_plt_second
;
3522 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
3526 plt_entry_size
= htab
->plt
.plt_entry_size
;
3528 /* Use the second PLT section only if there is .plt section. */
3529 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3531 eh
= (struct elf_x86_link_hash_entry
*) h
;
3532 if (eh
->no_finish_dynamic_symbol
)
3535 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3536 resolved undefined weak symbols in executable so that their
3537 references have value 0 at run-time. */
3538 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3540 if (h
->plt
.offset
!= (bfd_vma
) -1)
3542 bfd_vma plt_index
, plt_offset
;
3544 Elf_Internal_Rela rel
;
3546 asection
*plt
, *resolved_plt
, *gotplt
, *relplt
;
3548 /* When building a static executable, use .iplt, .igot.plt and
3549 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3550 if (htab
->elf
.splt
!= NULL
)
3552 plt
= htab
->elf
.splt
;
3553 gotplt
= htab
->elf
.sgotplt
;
3554 relplt
= htab
->elf
.srelplt
;
3558 plt
= htab
->elf
.iplt
;
3559 gotplt
= htab
->elf
.igotplt
;
3560 relplt
= htab
->elf
.irelplt
;
3563 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
3565 /* Get the index in the procedure linkage table which
3566 corresponds to this symbol. This is the index of this symbol
3567 in all the symbols for which we are making plt entries. The
3568 first entry in the procedure linkage table is reserved.
3570 Get the offset into the .got table of the entry that
3571 corresponds to this function. Each .got entry is 4 bytes.
3572 The first three are reserved.
3574 For static executables, we don't reserve anything. */
3576 if (plt
== htab
->elf
.splt
)
3578 got_offset
= (h
->plt
.offset
/ plt_entry_size
3579 - htab
->plt
.has_plt0
);
3580 got_offset
= (got_offset
+ 3) * 4;
3584 got_offset
= h
->plt
.offset
/ plt_entry_size
;
3585 got_offset
= got_offset
* 4;
3588 /* Fill in the entry in the procedure linkage table and update
3590 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
3595 const bfd_byte
*plt_entry
;
3596 if (bfd_link_pic (info
))
3597 plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
3599 plt_entry
= htab
->non_lazy_plt
->plt_entry
;
3600 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
3601 plt_entry
, htab
->non_lazy_plt
->plt_entry_size
);
3603 resolved_plt
= htab
->plt_second
;
3604 plt_offset
= eh
->plt_second
.offset
;
3609 plt_offset
= h
->plt
.offset
;
3612 if (! bfd_link_pic (info
))
3614 bfd_put_32 (output_bfd
,
3615 (gotplt
->output_section
->vma
3616 + gotplt
->output_offset
3618 resolved_plt
->contents
+ plt_offset
3619 + htab
->plt
.plt_got_offset
);
3621 if (htab
->target_os
== is_vxworks
)
3623 int s
, k
, reloc_index
;
3625 /* Create the R_386_32 relocation referencing the GOT
3626 for this PLT entry. */
3628 /* S: Current slot number (zero-based). */
3629 s
= ((h
->plt
.offset
- htab
->plt
.plt_entry_size
)
3630 / htab
->plt
.plt_entry_size
);
3631 /* K: Number of relocations for PLTResolve. */
3632 if (bfd_link_pic (info
))
3633 k
= PLTRESOLVE_RELOCS_SHLIB
;
3635 k
= PLTRESOLVE_RELOCS
;
3636 /* Skip the PLTresolve relocations, and the relocations for
3637 the other PLT slots. */
3638 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3639 loc
= (htab
->srelplt2
->contents
+ reloc_index
3640 * sizeof (Elf32_External_Rel
));
3642 rel
.r_offset
= (plt
->output_section
->vma
3643 + plt
->output_offset
3644 + h
->plt
.offset
+ 2),
3645 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3646 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3648 /* Create the R_386_32 relocation referencing the beginning of
3649 the PLT for this GOT entry. */
3650 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3651 + htab
->elf
.sgotplt
->output_offset
3653 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3654 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3655 loc
+ sizeof (Elf32_External_Rel
));
3660 bfd_put_32 (output_bfd
, got_offset
,
3661 resolved_plt
->contents
+ plt_offset
3662 + htab
->plt
.plt_got_offset
);
3665 /* Fill in the entry in the global offset table. Leave the entry
3666 as zero for undefined weak symbol in PIE. No PLT relocation
3667 against undefined weak symbol in PIE. */
3668 if (!local_undefweak
)
3670 if (htab
->plt
.has_plt0
)
3671 bfd_put_32 (output_bfd
,
3672 (plt
->output_section
->vma
3673 + plt
->output_offset
3675 + htab
->lazy_plt
->plt_lazy_offset
),
3676 gotplt
->contents
+ got_offset
);
3678 /* Fill in the entry in the .rel.plt section. */
3679 rel
.r_offset
= (gotplt
->output_section
->vma
3680 + gotplt
->output_offset
3682 if (PLT_LOCAL_IFUNC_P (info
, h
))
3684 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
3685 h
->root
.root
.string
,
3686 h
->root
.u
.def
.section
->owner
);
3688 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3689 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3690 in the .got.plt section. */
3691 bfd_put_32 (output_bfd
,
3692 (h
->root
.u
.def
.value
3693 + h
->root
.u
.def
.section
->output_section
->vma
3694 + h
->root
.u
.def
.section
->output_offset
),
3695 gotplt
->contents
+ got_offset
);
3696 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3697 /* R_386_IRELATIVE comes last. */
3698 plt_index
= htab
->next_irelative_index
--;
3702 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3703 plt_index
= htab
->next_jump_slot_index
++;
3706 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3707 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3709 /* Don't fill the second and third slots in PLT entry for
3710 static executables nor without PLT0. */
3711 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
3713 bfd_put_32 (output_bfd
,
3714 plt_index
* sizeof (Elf32_External_Rel
),
3715 plt
->contents
+ h
->plt
.offset
3716 + htab
->lazy_plt
->plt_reloc_offset
);
3717 bfd_put_32 (output_bfd
,
3719 + htab
->lazy_plt
->plt_plt_offset
+ 4),
3720 (plt
->contents
+ h
->plt
.offset
3721 + htab
->lazy_plt
->plt_plt_offset
));
3725 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3727 bfd_vma got_offset
, plt_offset
;
3728 asection
*plt
, *got
, *gotplt
;
3729 const bfd_byte
*got_plt_entry
;
3731 /* Set the entry in the GOT procedure linkage table. */
3732 plt
= htab
->plt_got
;
3733 got
= htab
->elf
.sgot
;
3734 gotplt
= htab
->elf
.sgotplt
;
3735 got_offset
= h
->got
.offset
;
3737 if (got_offset
== (bfd_vma
) -1
3743 /* Fill in the entry in the GOT procedure linkage table. */
3744 if (! bfd_link_pic (info
))
3746 got_plt_entry
= htab
->non_lazy_plt
->plt_entry
;
3747 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
3751 got_plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
3752 got_offset
+= (got
->output_section
->vma
3753 + got
->output_offset
3754 - gotplt
->output_section
->vma
3755 - gotplt
->output_offset
);
3758 plt_offset
= eh
->plt_got
.offset
;
3759 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
3760 htab
->non_lazy_plt
->plt_entry_size
);
3761 bfd_put_32 (output_bfd
, got_offset
,
3762 (plt
->contents
+ plt_offset
3763 + htab
->non_lazy_plt
->plt_got_offset
));
3766 if (!local_undefweak
3768 && (h
->plt
.offset
!= (bfd_vma
) -1
3769 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
3771 /* Mark the symbol as undefined, rather than as defined in
3772 the .plt section. Leave the value if there were any
3773 relocations where pointer equality matters (this is a clue
3774 for the dynamic linker, to make function pointer
3775 comparisons work between an application and shared
3776 library), otherwise set it to zero. If a function is only
3777 called from a binary, there is no need to slow down
3778 shared libraries because of that. */
3779 sym
->st_shndx
= SHN_UNDEF
;
3780 if (!h
->pointer_equality_needed
)
3784 /* Don't generate dynamic GOT relocation against undefined weak
3785 symbol in executable. */
3786 if (h
->got
.offset
!= (bfd_vma
) -1
3787 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h
)->tls_type
)
3788 && (elf_x86_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
3789 && !local_undefweak
)
3791 Elf_Internal_Rela rel
;
3792 asection
*relgot
= htab
->elf
.srelgot
;
3794 /* This symbol has an entry in the global offset table. Set it
3797 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3800 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3801 + htab
->elf
.sgot
->output_offset
3802 + (h
->got
.offset
& ~(bfd_vma
) 1));
3804 /* If this is a static link, or it is a -Bsymbolic link and the
3805 symbol is defined locally or was forced to be local because
3806 of a version file, we just want to emit a RELATIVE reloc.
3807 The entry in the global offset table will already have been
3808 initialized in the relocate_section function. */
3810 && h
->type
== STT_GNU_IFUNC
)
3812 if (h
->plt
.offset
== (bfd_vma
) -1)
3814 /* STT_GNU_IFUNC is referenced without PLT. */
3815 if (htab
->elf
.splt
== NULL
)
3817 /* use .rel[a].iplt section to store .got relocations
3818 in static executable. */
3819 relgot
= htab
->elf
.irelplt
;
3821 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3823 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
3824 h
->root
.root
.string
,
3825 h
->root
.u
.def
.section
->owner
);
3827 bfd_put_32 (output_bfd
,
3828 (h
->root
.u
.def
.value
3829 + h
->root
.u
.def
.section
->output_section
->vma
3830 + h
->root
.u
.def
.section
->output_offset
),
3831 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3832 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3837 else if (bfd_link_pic (info
))
3839 /* Generate R_386_GLOB_DAT. */
3847 if (!h
->pointer_equality_needed
)
3850 /* For non-shared object, we can't use .got.plt, which
3851 contains the real function addres if we need pointer
3852 equality. We load the GOT entry with the PLT entry. */
3853 if (htab
->plt_second
!= NULL
)
3855 plt
= htab
->plt_second
;
3856 plt_offset
= eh
->plt_second
.offset
;
3860 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3861 plt_offset
= h
->plt
.offset
;
3863 bfd_put_32 (output_bfd
,
3864 (plt
->output_section
->vma
3865 + plt
->output_offset
+ plt_offset
),
3866 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3870 else if (bfd_link_pic (info
)
3871 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3873 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3874 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3878 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3880 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3881 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3882 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3885 elf_append_rel (output_bfd
, relgot
, &rel
);
3890 Elf_Internal_Rela rel
;
3893 /* This symbol needs a copy reloc. Set it up. */
3894 VERIFY_COPY_RELOC (h
, htab
)
3896 rel
.r_offset
= (h
->root
.u
.def
.value
3897 + h
->root
.u
.def
.section
->output_section
->vma
3898 + h
->root
.u
.def
.section
->output_offset
);
3899 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3900 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3901 s
= htab
->elf
.sreldynrelro
;
3903 s
= htab
->elf
.srelbss
;
3904 elf_append_rel (output_bfd
, s
, &rel
);
3910 /* Finish up local dynamic symbol handling. We set the contents of
3911 various dynamic sections here. */
3914 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
3916 struct elf_link_hash_entry
*h
3917 = (struct elf_link_hash_entry
*) *slot
;
3918 struct bfd_link_info
*info
3919 = (struct bfd_link_info
*) inf
;
3921 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
3925 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3926 here since undefined weak symbol may not be dynamic and may not be
3927 called for elf_i386_finish_dynamic_symbol. */
3930 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
3933 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
3934 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3936 if (h
->root
.type
!= bfd_link_hash_undefweak
3937 || h
->dynindx
!= -1)
3940 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
3944 /* Used to decide how to sort relocs in an optimal manner for the
3945 dynamic linker, before writing them out. */
3947 static enum elf_reloc_type_class
3948 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
3949 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3950 const Elf_Internal_Rela
*rela
)
3952 bfd
*abfd
= info
->output_bfd
;
3953 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3954 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3956 if (htab
->dynsym
!= NULL
3957 && htab
->dynsym
->contents
!= NULL
)
3959 /* Check relocation against STT_GNU_IFUNC symbol if there are
3961 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
3962 if (r_symndx
!= STN_UNDEF
)
3964 Elf_Internal_Sym sym
;
3965 if (!bed
->s
->swap_symbol_in (abfd
,
3966 (htab
->dynsym
->contents
3967 + r_symndx
* sizeof (Elf32_External_Sym
)),
3971 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3972 return reloc_class_ifunc
;
3976 switch (ELF32_R_TYPE (rela
->r_info
))
3978 case R_386_IRELATIVE
:
3979 return reloc_class_ifunc
;
3980 case R_386_RELATIVE
:
3981 return reloc_class_relative
;
3982 case R_386_JUMP_SLOT
:
3983 return reloc_class_plt
;
3985 return reloc_class_copy
;
3987 return reloc_class_normal
;
3991 /* Finish up the dynamic sections. */
3994 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3995 struct bfd_link_info
*info
)
3997 struct elf_x86_link_hash_table
*htab
;
3999 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
4003 if (!htab
->elf
.dynamic_sections_created
)
4006 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4008 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4009 really seem like the right value. */
4010 elf_section_data (htab
->elf
.splt
->output_section
)
4011 ->this_hdr
.sh_entsize
= 4;
4013 if (htab
->plt
.has_plt0
)
4015 /* Fill in the special first entry in the procedure linkage
4017 memcpy (htab
->elf
.splt
->contents
, htab
->plt
.plt0_entry
,
4018 htab
->lazy_plt
->plt0_entry_size
);
4019 memset (htab
->elf
.splt
->contents
+ htab
->lazy_plt
->plt0_entry_size
,
4020 htab
->plt0_pad_byte
,
4021 htab
->plt
.plt_entry_size
- htab
->lazy_plt
->plt0_entry_size
);
4022 if (!bfd_link_pic (info
))
4024 bfd_put_32 (output_bfd
,
4025 (htab
->elf
.sgotplt
->output_section
->vma
4026 + htab
->elf
.sgotplt
->output_offset
4028 htab
->elf
.splt
->contents
4029 + htab
->lazy_plt
->plt0_got1_offset
);
4030 bfd_put_32 (output_bfd
,
4031 (htab
->elf
.sgotplt
->output_section
->vma
4032 + htab
->elf
.sgotplt
->output_offset
4034 htab
->elf
.splt
->contents
4035 + htab
->lazy_plt
->plt0_got2_offset
);
4037 if (htab
->target_os
== is_vxworks
)
4039 Elf_Internal_Rela rel
;
4040 int num_plts
= (htab
->elf
.splt
->size
4041 / htab
->plt
.plt_entry_size
) - 1;
4043 asection
*srelplt2
= htab
->srelplt2
;
4045 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4046 + 4. On IA32 we use REL relocations so the
4047 addend goes in the PLT directly. */
4048 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4049 + htab
->elf
.splt
->output_offset
4050 + htab
->lazy_plt
->plt0_got1_offset
);
4051 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4053 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4054 srelplt2
->contents
);
4055 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4057 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4058 + htab
->elf
.splt
->output_offset
4059 + htab
->lazy_plt
->plt0_got2_offset
);
4060 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4062 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4063 srelplt2
->contents
+
4064 sizeof (Elf32_External_Rel
));
4065 /* Correct the .rel.plt.unloaded relocations. */
4066 p
= srelplt2
->contents
;
4067 if (bfd_link_pic (info
))
4068 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4070 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4072 for (; num_plts
; num_plts
--)
4074 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4075 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4077 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4078 p
+= sizeof (Elf32_External_Rel
);
4080 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4081 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
4083 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4084 p
+= sizeof (Elf32_External_Rel
);
4091 /* Fill PLT entries for undefined weak symbols in PIE. */
4092 if (bfd_link_pie (info
))
4093 bfd_hash_traverse (&info
->hash
->table
,
4094 elf_i386_pie_finish_undefweak_symbol
,
4100 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4101 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4102 It has to be done before elf_link_sort_relocs is called so that
4103 dynamic relocations are properly sorted. */
4106 elf_i386_output_arch_local_syms
4107 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4108 struct bfd_link_info
*info
,
4109 void *flaginfo ATTRIBUTE_UNUSED
,
4110 int (*func
) (void *, const char *,
4113 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4115 struct elf_x86_link_hash_table
*htab
4116 = elf_x86_hash_table (info
, I386_ELF_DATA
);
4120 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4121 htab_traverse (htab
->loc_hash_table
,
4122 elf_i386_finish_local_dynamic_symbol
,
4128 /* Forward declaration. */
4129 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt
;
4131 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4132 dynamic relocations. */
4135 elf_i386_get_synthetic_symtab (bfd
*abfd
,
4136 long symcount ATTRIBUTE_UNUSED
,
4137 asymbol
**syms ATTRIBUTE_UNUSED
,
4144 bfd_byte
*plt_contents
;
4146 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4147 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4148 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4149 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4152 enum elf_x86_plt_type plt_type
;
4153 struct elf_x86_plt plts
[] =
4155 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4156 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4157 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4158 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4163 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4166 if (dynsymcount
<= 0)
4169 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4173 non_lazy_plt
= NULL
;
4174 /* Silence GCC 6. */
4176 non_lazy_ibt_plt
= NULL
;
4177 lazy_ibt_plt
= NULL
;
4178 switch (get_elf_x86_backend_data (abfd
)->target_os
)
4181 non_lazy_plt
= &elf_i386_non_lazy_plt
;
4182 lazy_ibt_plt
= &elf_i386_lazy_ibt_plt
;
4183 non_lazy_ibt_plt
= &elf_i386_non_lazy_ibt_plt
;
4186 lazy_plt
= &elf_i386_lazy_plt
;
4189 lazy_plt
= &elf_i386_nacl_plt
;
4196 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4198 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4199 if (plt
== NULL
|| plt
->size
== 0)
4202 /* Get the PLT section contents. */
4203 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4204 if (plt_contents
== NULL
)
4206 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4207 plt_contents
, 0, plt
->size
))
4209 free (plt_contents
);
4213 /* Check what kind of PLT it is. */
4214 plt_type
= plt_unknown
;
4215 if (plts
[j
].type
== plt_unknown
4216 && (plt
->size
>= (lazy_plt
->plt0_entry_size
4217 + lazy_plt
->plt_entry_size
)))
4219 /* Match lazy PLT first. */
4220 if (memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4221 lazy_plt
->plt0_got1_offset
) == 0)
4223 /* The fist entry in the lazy IBT PLT is the same as the
4225 if (lazy_ibt_plt
!= NULL
4226 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt0_entry_size
,
4227 lazy_ibt_plt
->plt_entry
,
4228 lazy_ibt_plt
->plt_got_offset
) == 0))
4229 plt_type
= plt_lazy
| plt_second
;
4231 plt_type
= plt_lazy
;
4233 else if (memcmp (plt_contents
, lazy_plt
->pic_plt0_entry
,
4234 lazy_plt
->plt0_got1_offset
) == 0)
4236 /* The fist entry in the PIC lazy IBT PLT is the same as
4237 the normal PIC lazy PLT. */
4238 if (lazy_ibt_plt
!= NULL
4239 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt0_entry_size
,
4240 lazy_ibt_plt
->pic_plt_entry
,
4241 lazy_ibt_plt
->plt_got_offset
) == 0))
4242 plt_type
= plt_lazy
| plt_pic
| plt_second
;
4244 plt_type
= plt_lazy
| plt_pic
;
4248 if (non_lazy_plt
!= NULL
4249 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4250 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4252 /* Match non-lazy PLT. */
4253 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4254 non_lazy_plt
->plt_got_offset
) == 0)
4255 plt_type
= plt_non_lazy
;
4256 else if (memcmp (plt_contents
, non_lazy_plt
->pic_plt_entry
,
4257 non_lazy_plt
->plt_got_offset
) == 0)
4261 if ((non_lazy_ibt_plt
!= NULL
)
4262 && (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4263 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
)
4265 if (memcmp (plt_contents
,
4266 non_lazy_ibt_plt
->plt_entry
,
4267 non_lazy_ibt_plt
->plt_got_offset
) == 0)
4269 /* Match IBT PLT. */
4270 plt_type
= plt_second
;
4271 non_lazy_plt
= non_lazy_ibt_plt
;
4273 else if (memcmp (plt_contents
,
4274 non_lazy_ibt_plt
->pic_plt_entry
,
4275 non_lazy_ibt_plt
->plt_got_offset
) == 0)
4277 /* Match PIC IBT PLT. */
4278 plt_type
= plt_second
| plt_pic
;
4279 non_lazy_plt
= non_lazy_ibt_plt
;
4283 if (plt_type
== plt_unknown
)
4285 free (plt_contents
);
4290 plts
[j
].type
= plt_type
;
4292 if ((plt_type
& plt_lazy
))
4294 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4295 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4296 /* Skip PLT0 in lazy PLT. */
4301 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4302 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4306 /* Skip lazy PLT when the second PLT is used. */
4307 if ((plt_type
& (plt_lazy
| plt_second
))
4308 == (plt_lazy
| plt_second
))
4312 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4317 plts
[j
].contents
= plt_contents
;
4319 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4320 if ((plt_type
& plt_pic
))
4321 got_addr
= (bfd_vma
) -1;
4324 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4325 got_addr
, plts
, dynsyms
,
4329 /* Set up i386 GNU properties. Return the first relocatable ELF input
4330 with GNU properties if found. Otherwise, return NULL. */
4333 elf_i386_link_setup_gnu_properties (struct bfd_link_info
*info
)
4335 struct elf_x86_init_table init_table
;
4337 switch (get_elf_x86_backend_data (info
->output_bfd
)->target_os
)
4340 init_table
.plt0_pad_byte
= 0x0;
4341 init_table
.lazy_plt
= &elf_i386_lazy_plt
;
4342 init_table
.non_lazy_plt
= &elf_i386_non_lazy_plt
;
4343 init_table
.lazy_ibt_plt
= &elf_i386_lazy_ibt_plt
;
4344 init_table
.non_lazy_ibt_plt
= &elf_i386_non_lazy_ibt_plt
;
4347 init_table
.plt0_pad_byte
= 0x90;
4348 init_table
.lazy_plt
= &elf_i386_lazy_plt
;
4349 init_table
.non_lazy_plt
= NULL
;
4350 init_table
.lazy_ibt_plt
= NULL
;
4351 init_table
.non_lazy_ibt_plt
= NULL
;
4354 init_table
.plt0_pad_byte
= 0x90;
4355 init_table
.lazy_plt
= &elf_i386_nacl_plt
;
4356 init_table
.non_lazy_plt
= NULL
;
4357 init_table
.lazy_ibt_plt
= NULL
;
4358 init_table
.non_lazy_ibt_plt
= NULL
;
4362 init_table
.r_info
= elf32_r_info
;
4363 init_table
.r_sym
= elf32_r_sym
;
4365 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
4368 #define TARGET_LITTLE_SYM i386_elf32_vec
4369 #define TARGET_LITTLE_NAME "elf32-i386"
4370 #define ELF_ARCH bfd_arch_i386
4371 #define ELF_TARGET_ID I386_ELF_DATA
4372 #define ELF_MACHINE_CODE EM_386
4373 #define ELF_MAXPAGESIZE 0x1000
4375 #define elf_backend_can_gc_sections 1
4376 #define elf_backend_can_refcount 1
4377 #define elf_backend_want_got_plt 1
4378 #define elf_backend_plt_readonly 1
4379 #define elf_backend_want_plt_sym 0
4380 #define elf_backend_got_header_size 12
4381 #define elf_backend_plt_alignment 4
4382 #define elf_backend_dtrel_excludes_plt 1
4383 #define elf_backend_extern_protected_data 1
4384 #define elf_backend_caches_rawsize 1
4385 #define elf_backend_want_dynrelro 1
4387 /* Support RELA for objdump of prelink objects. */
4388 #define elf_info_to_howto elf_i386_info_to_howto_rel
4389 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4391 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4392 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4393 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4394 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
4396 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4397 #define elf_backend_check_relocs elf_i386_check_relocs
4398 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4399 #define elf_backend_fake_sections elf_i386_fake_sections
4400 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4401 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4402 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
4403 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4404 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4405 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4406 #define elf_backend_relocate_section elf_i386_relocate_section
4407 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
4408 #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
4410 #define elf_backend_linux_prpsinfo32_ugid16 TRUE
4412 #include "elf32-target.h"
4414 /* FreeBSD support. */
4416 #undef TARGET_LITTLE_SYM
4417 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
4418 #undef TARGET_LITTLE_NAME
4419 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4421 #define ELF_OSABI ELFOSABI_FREEBSD
4423 /* The kernel recognizes executables as valid only if they carry a
4424 "FreeBSD" label in the ELF header. So we put this label on all
4425 executables and (for simplicity) also all other object files. */
4428 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4430 _bfd_elf_post_process_headers (abfd
, info
);
4432 #ifdef OLD_FREEBSD_ABI_LABEL
4434 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4435 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
4436 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4441 #undef elf_backend_post_process_headers
4442 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4444 #define elf32_bed elf32_i386_fbsd_bed
4446 #undef elf_backend_add_symbol_hook
4448 #include "elf32-target.h"
4452 #undef TARGET_LITTLE_SYM
4453 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
4454 #undef TARGET_LITTLE_NAME
4455 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4457 #undef elf_backend_post_process_headers
4459 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4460 objects won't be recognized. */
4464 #define elf32_bed elf32_i386_sol2_bed
4466 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4468 #undef elf_backend_static_tls_alignment
4469 #define elf_backend_static_tls_alignment 8
4471 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4473 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4475 #undef elf_backend_want_plt_sym
4476 #define elf_backend_want_plt_sym 1
4478 #undef elf_backend_strtab_flags
4479 #define elf_backend_strtab_flags SHF_STRINGS
4481 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4482 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4483 FALSE otherwise. ISECTION is the best guess matching section from the
4484 input bfd IBFD, but it might be NULL. */
4487 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
4488 bfd
*obfd ATTRIBUTE_UNUSED
,
4489 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
4490 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
4492 /* PR 19938: FIXME: Need to add code for setting the sh_info
4493 and sh_link fields of Solaris specific section types. */
4496 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4497 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4499 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4501 The following values should be set:
4504 -----------------------------------------------------------------------------
4505 SHT_SUNW_ancillary The section header index of 0
4506 [0x6fffffee] the associated string table.
4508 SHT_SUNW_capinfo The section header index of For a dynamic object, the
4509 [0x6ffffff0] the associated symbol table. section header index of
4511 SHT_SUNW_capchain table,
4514 SHT_SUNW_symsort The section header index of 0
4515 [0x6ffffff1] the associated symbol table.
4517 SHT_SUNW_tlssort The section header index of 0
4518 [0x6ffffff2] the associated symbol table.
4520 SHT_SUNW_LDYNSYM The section header index of One greater than the
4521 [0x6ffffff3] the associated string table. symbol table index of the
4522 This index is the same string last local symbol,
4523 table used by the SHT_DYNSYM STB_LOCAL. Since
4524 section. SHT_SUNW_LDYNSYM only
4525 contains local symbols,
4526 sh_info is equivalent to
4527 the number of symbols in
4530 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4531 [0x6ffffff5] the section header index of to named strings, the
4532 the associated section header index of
4533 SHT_SUNW_capinfo table, the associated string
4534 otherwise 0. table, otherwise 0.
4536 SHT_SUNW_move The section header index of 0
4537 [0x6ffffffa] the associated symbol table.
4542 SHT_SUNW_syminfo The section header index of The section header index
4543 [0x6ffffffc] the associated symbol table. of the associated
4546 SHT_SUNW_verdef The section header index of The number of version
4547 [0x6ffffffd] the associated string table. definitions within the
4550 SHT_SUNW_verneed The section header index of The number of version
4551 [0x6ffffffe] the associated string table. dependencies within the
4554 SHT_SUNW_versym The section header index of 0
4555 [0x6fffffff] the associated symbol table. */
4558 #undef elf_backend_copy_special_section_fields
4559 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4561 #include "elf32-target.h"
4563 /* Intel MCU support. */
4566 elf32_iamcu_elf_object_p (bfd
*abfd
)
4568 /* Set the right machine number for an IAMCU elf32 file. */
4569 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
4573 #undef TARGET_LITTLE_SYM
4574 #define TARGET_LITTLE_SYM iamcu_elf32_vec
4575 #undef TARGET_LITTLE_NAME
4576 #define TARGET_LITTLE_NAME "elf32-iamcu"
4578 #define ELF_ARCH bfd_arch_iamcu
4580 #undef ELF_MACHINE_CODE
4581 #define ELF_MACHINE_CODE EM_IAMCU
4586 #define elf32_bed elf32_iamcu_bed
4588 #undef elf_backend_object_p
4589 #define elf_backend_object_p elf32_iamcu_elf_object_p
4591 #undef elf_backend_static_tls_alignment
4593 #undef elf_backend_want_plt_sym
4594 #define elf_backend_want_plt_sym 0
4596 #undef elf_backend_strtab_flags
4597 #undef elf_backend_copy_special_section_fields
4599 #include "elf32-target.h"
4601 /* Restore defaults. */
4603 #define ELF_ARCH bfd_arch_i386
4604 #undef ELF_MACHINE_CODE
4605 #define ELF_MACHINE_CODE EM_386
4607 /* Native Client support. */
4609 #undef TARGET_LITTLE_SYM
4610 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
4611 #undef TARGET_LITTLE_NAME
4612 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
4614 #define elf32_bed elf32_i386_nacl_bed
4616 #undef ELF_MAXPAGESIZE
4617 #define ELF_MAXPAGESIZE 0x10000
4619 /* Restore defaults. */
4621 #undef elf_backend_want_plt_sym
4622 #define elf_backend_want_plt_sym 0
4623 #undef elf_backend_post_process_headers
4624 #undef elf_backend_static_tls_alignment
4626 /* NaCl uses substantially different PLT entries for the same effects. */
4628 #undef elf_backend_plt_alignment
4629 #define elf_backend_plt_alignment 5
4630 #define NACL_PLT_ENTRY_SIZE 64
4631 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
4633 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
4635 0xff, 0x35, /* pushl contents of address */
4636 0, 0, 0, 0, /* replaced with address of .got + 4. */
4637 0x8b, 0x0d, /* movl contents of address, %ecx */
4638 0, 0, 0, 0, /* replaced with address of .got + 8. */
4639 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
4640 0xff, 0xe1 /* jmp *%ecx */
4643 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
4645 0x8b, 0x0d, /* movl contents of address, %ecx */
4646 0, 0, 0, 0, /* replaced with GOT slot address. */
4647 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
4648 0xff, 0xe1, /* jmp *%ecx */
4650 /* Pad to the next 32-byte boundary with nop instructions. */
4652 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4653 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4655 /* Lazy GOT entries point here (32-byte aligned). */
4656 0x68, /* pushl immediate */
4657 0, 0, 0, 0, /* replaced with reloc offset. */
4658 0xe9, /* jmp relative */
4659 0, 0, 0, 0, /* replaced with offset to .plt. */
4661 /* Pad to the next 32-byte boundary with nop instructions. */
4662 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4663 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4667 static const bfd_byte
4668 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
4670 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
4671 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
4672 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
4673 0xff, 0xe1, /* jmp *%ecx */
4675 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
4676 so pad to that size with nop instructions. */
4677 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
4680 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
4682 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
4683 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
4684 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
4685 0xff, 0xe1, /* jmp *%ecx */
4687 /* Pad to the next 32-byte boundary with nop instructions. */
4689 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4690 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4692 /* Lazy GOT entries point here (32-byte aligned). */
4693 0x68, /* pushl immediate */
4694 0, 0, 0, 0, /* replaced with offset into relocation table. */
4695 0xe9, /* jmp relative */
4696 0, 0, 0, 0, /* replaced with offset to start of .plt. */
4698 /* Pad to the next 32-byte boundary with nop instructions. */
4699 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4700 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
4704 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
4706 #if (PLT_CIE_LENGTH != 20 \
4707 || PLT_FDE_LENGTH != 36 \
4708 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
4709 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
4710 # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!"
4712 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
4713 0, 0, 0, 0, /* CIE ID */
4714 1, /* CIE version */
4715 'z', 'R', 0, /* Augmentation string */
4716 1, /* Code alignment factor */
4717 0x7c, /* Data alignment factor: -4 */
4718 8, /* Return address column */
4719 1, /* Augmentation size */
4720 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
4721 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
4722 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
4723 DW_CFA_nop
, DW_CFA_nop
,
4725 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
4726 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
4727 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
4728 0, 0, 0, 0, /* .plt size goes here */
4729 0, /* Augmentation size */
4730 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
4731 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
4732 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
4733 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
4734 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
4735 13, /* Block length */
4736 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
4737 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
4738 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
4739 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
4740 DW_CFA_nop
, DW_CFA_nop
4743 static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt
=
4745 elf_i386_nacl_plt0_entry
, /* plt0_entry */
4746 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
4747 elf_i386_nacl_plt_entry
, /* plt_entry */
4748 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
4749 2, /* plt0_got1_offset */
4750 8, /* plt0_got2_offset */
4751 0, /* plt0_got2_insn_end */
4752 2, /* plt_got_offset */
4753 33, /* plt_reloc_offset */
4754 38, /* plt_plt_offset */
4755 0, /* plt_got_insn_size */
4756 0, /* plt_plt_insn_end */
4757 32, /* plt_lazy_offset */
4758 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
4759 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
4760 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
4761 sizeof (elf_i386_nacl_eh_frame_plt
) /* eh_frame_plt_size */
4764 static const struct elf_x86_backend_data elf_i386_nacl_arch_bed
=
4770 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
4772 /* Set the right machine number for a NaCl i386 ELF32 file. */
4773 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
4777 #undef elf_backend_arch_data
4778 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
4780 #undef elf_backend_object_p
4781 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
4782 #undef elf_backend_modify_segment_map
4783 #define elf_backend_modify_segment_map nacl_modify_segment_map
4784 #undef elf_backend_modify_program_headers
4785 #define elf_backend_modify_program_headers nacl_modify_program_headers
4786 #undef elf_backend_final_write_processing
4787 #define elf_backend_final_write_processing nacl_final_write_processing
4789 #include "elf32-target.h"
4791 /* Restore defaults. */
4792 #undef elf_backend_object_p
4793 #undef elf_backend_modify_segment_map
4794 #undef elf_backend_modify_program_headers
4795 #undef elf_backend_final_write_processing
4797 /* VxWorks support. */
4799 #undef TARGET_LITTLE_SYM
4800 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
4801 #undef TARGET_LITTLE_NAME
4802 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4804 #undef ELF_MAXPAGESIZE
4805 #define ELF_MAXPAGESIZE 0x1000
4806 #undef elf_backend_plt_alignment
4807 #define elf_backend_plt_alignment 4
4809 static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed
=
4814 #undef elf_backend_arch_data
4815 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
4817 #undef elf_backend_relocs_compatible
4818 #undef elf_backend_add_symbol_hook
4819 #define elf_backend_add_symbol_hook \
4820 elf_vxworks_add_symbol_hook
4821 #undef elf_backend_link_output_symbol_hook
4822 #define elf_backend_link_output_symbol_hook \
4823 elf_vxworks_link_output_symbol_hook
4824 #undef elf_backend_emit_relocs
4825 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4826 #undef elf_backend_final_write_processing
4827 #define elf_backend_final_write_processing \
4828 elf_vxworks_final_write_processing
4829 #undef elf_backend_static_tls_alignment
4831 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4833 #undef elf_backend_want_plt_sym
4834 #define elf_backend_want_plt_sym 1
4837 #define elf32_bed elf32_i386_vxworks_bed
4839 #include "elf32-target.h"