1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2022 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"
22 #include "elf-vxworks.h"
24 #include "opcode/i386.h"
26 /* 386 uses REL relocations instead of RELA. */
29 static reloc_howto_type elf_howto_table
[]=
31 HOWTO(R_386_NONE
, 0, 3, 0, false, 0, complain_overflow_dont
,
32 bfd_elf_generic_reloc
, "R_386_NONE",
33 true, 0x00000000, 0x00000000, false),
34 HOWTO(R_386_32
, 0, 2, 32, false, 0, complain_overflow_dont
,
35 bfd_elf_generic_reloc
, "R_386_32",
36 true, 0xffffffff, 0xffffffff, false),
37 HOWTO(R_386_PC32
, 0, 2, 32, true, 0, complain_overflow_dont
,
38 bfd_elf_generic_reloc
, "R_386_PC32",
39 true, 0xffffffff, 0xffffffff, true),
40 HOWTO(R_386_GOT32
, 0, 2, 32, false, 0, complain_overflow_dont
,
41 bfd_elf_generic_reloc
, "R_386_GOT32",
42 true, 0xffffffff, 0xffffffff, false),
43 HOWTO(R_386_PLT32
, 0, 2, 32, true, 0, complain_overflow_dont
,
44 bfd_elf_generic_reloc
, "R_386_PLT32",
45 true, 0xffffffff, 0xffffffff, true),
46 HOWTO(R_386_COPY
, 0, 2, 32, false, 0, complain_overflow_dont
,
47 bfd_elf_generic_reloc
, "R_386_COPY",
48 true, 0xffffffff, 0xffffffff, false),
49 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, false, 0, complain_overflow_dont
,
50 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
51 true, 0xffffffff, 0xffffffff, false),
52 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, false, 0, complain_overflow_dont
,
53 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
54 true, 0xffffffff, 0xffffffff, false),
55 HOWTO(R_386_RELATIVE
, 0, 2, 32, false, 0, complain_overflow_dont
,
56 bfd_elf_generic_reloc
, "R_386_RELATIVE",
57 true, 0xffffffff, 0xffffffff, false),
58 HOWTO(R_386_GOTOFF
, 0, 2, 32, false, 0, complain_overflow_dont
,
59 bfd_elf_generic_reloc
, "R_386_GOTOFF",
60 true, 0xffffffff, 0xffffffff, false),
61 HOWTO(R_386_GOTPC
, 0, 2, 32, true, 0, complain_overflow_dont
,
62 bfd_elf_generic_reloc
, "R_386_GOTPC",
63 true, 0xffffffff, 0xffffffff, true),
65 /* We have a gap in the reloc numbers here.
66 R_386_standard counts the number up to this point, and
67 R_386_ext_offset is the value to subtract from a reloc type of
68 R_386_16 thru R_386_PC8 to form an index into this table. */
69 #define R_386_standard (R_386_GOTPC + 1)
70 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
72 /* These relocs are a GNU extension. */
73 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, false, 0, complain_overflow_dont
,
74 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
75 true, 0xffffffff, 0xffffffff, false),
76 HOWTO(R_386_TLS_IE
, 0, 2, 32, false, 0, complain_overflow_dont
,
77 bfd_elf_generic_reloc
, "R_386_TLS_IE",
78 true, 0xffffffff, 0xffffffff, false),
79 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, false, 0, complain_overflow_dont
,
80 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
81 true, 0xffffffff, 0xffffffff, false),
82 HOWTO(R_386_TLS_LE
, 0, 2, 32, false, 0, complain_overflow_dont
,
83 bfd_elf_generic_reloc
, "R_386_TLS_LE",
84 true, 0xffffffff, 0xffffffff, false),
85 HOWTO(R_386_TLS_GD
, 0, 2, 32, false, 0, complain_overflow_dont
,
86 bfd_elf_generic_reloc
, "R_386_TLS_GD",
87 true, 0xffffffff, 0xffffffff, false),
88 HOWTO(R_386_TLS_LDM
, 0, 2, 32, false, 0, complain_overflow_dont
,
89 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
90 true, 0xffffffff, 0xffffffff, false),
91 HOWTO(R_386_16
, 0, 1, 16, false, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_16",
93 true, 0xffff, 0xffff, false),
94 HOWTO(R_386_PC16
, 0, 1, 16, true, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_PC16",
96 true, 0xffff, 0xffff, true),
97 HOWTO(R_386_8
, 0, 0, 8, false, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_8",
99 true, 0xff, 0xff, false),
100 HOWTO(R_386_PC8
, 0, 0, 8, true, 0, complain_overflow_signed
,
101 bfd_elf_generic_reloc
, "R_386_PC8",
102 true, 0xff, 0xff, true),
104 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
105 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
106 /* These are common with Solaris TLS implementation. */
107 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, false, 0, complain_overflow_dont
,
108 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
109 true, 0xffffffff, 0xffffffff, false),
110 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, false, 0, complain_overflow_dont
,
111 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
112 true, 0xffffffff, 0xffffffff, false),
113 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, false, 0, complain_overflow_dont
,
114 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
115 true, 0xffffffff, 0xffffffff, false),
116 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, false, 0, complain_overflow_dont
,
117 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
118 true, 0xffffffff, 0xffffffff, false),
119 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, false, 0, complain_overflow_dont
,
120 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
121 true, 0xffffffff, 0xffffffff, false),
122 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, false, 0, complain_overflow_dont
,
123 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
124 true, 0xffffffff, 0xffffffff, false),
125 HOWTO(R_386_SIZE32
, 0, 2, 32, false, 0, complain_overflow_dont
,
126 bfd_elf_generic_reloc
, "R_386_SIZE32",
127 true, 0xffffffff, 0xffffffff, false),
128 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, false, 0, complain_overflow_dont
,
129 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
130 true, 0xffffffff, 0xffffffff, false),
131 HOWTO(R_386_TLS_DESC_CALL
, 0, 3, 0, false, 0, complain_overflow_dont
,
132 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
134 HOWTO(R_386_TLS_DESC
, 0, 2, 32, false, 0, complain_overflow_dont
,
135 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
136 true, 0xffffffff, 0xffffffff, false),
137 HOWTO(R_386_IRELATIVE
, 0, 2, 32, false, 0, complain_overflow_dont
,
138 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
139 true, 0xffffffff, 0xffffffff, false),
140 HOWTO(R_386_GOT32X
, 0, 2, 32, false, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_386_GOT32X",
142 true, 0xffffffff, 0xffffffff, false),
145 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
146 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
148 /* GNU extension to record C++ vtable hierarchy. */
149 HOWTO (R_386_GNU_VTINHERIT
, /* type */
151 2, /* size (0 = byte, 1 = short, 2 = long) */
153 false, /* pc_relative */
155 complain_overflow_dont
, /* complain_on_overflow */
156 NULL
, /* special_function */
157 "R_386_GNU_VTINHERIT", /* name */
158 false, /* partial_inplace */
161 false), /* pcrel_offset */
163 /* GNU extension to record C++ vtable member usage. */
164 HOWTO (R_386_GNU_VTENTRY
, /* type */
166 2, /* size (0 = byte, 1 = short, 2 = long) */
168 false, /* pc_relative */
170 complain_overflow_dont
, /* complain_on_overflow */
171 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
172 "R_386_GNU_VTENTRY", /* name */
173 false, /* partial_inplace */
176 false) /* pcrel_offset */
178 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
182 #ifdef DEBUG_GEN_RELOC
184 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
189 static reloc_howto_type
*
190 elf_i386_reloc_type_lookup (bfd
*abfd
,
191 bfd_reloc_code_real_type code
)
196 TRACE ("BFD_RELOC_NONE");
197 return &elf_howto_table
[R_386_NONE
];
200 TRACE ("BFD_RELOC_32");
201 return &elf_howto_table
[R_386_32
];
204 TRACE ("BFD_RELOC_CTOR");
205 return &elf_howto_table
[R_386_32
];
207 case BFD_RELOC_32_PCREL
:
208 TRACE ("BFD_RELOC_PC32");
209 return &elf_howto_table
[R_386_PC32
];
211 case BFD_RELOC_386_GOT32
:
212 TRACE ("BFD_RELOC_386_GOT32");
213 return &elf_howto_table
[R_386_GOT32
];
215 case BFD_RELOC_386_PLT32
:
216 TRACE ("BFD_RELOC_386_PLT32");
217 return &elf_howto_table
[R_386_PLT32
];
219 case BFD_RELOC_386_COPY
:
220 TRACE ("BFD_RELOC_386_COPY");
221 return &elf_howto_table
[R_386_COPY
];
223 case BFD_RELOC_386_GLOB_DAT
:
224 TRACE ("BFD_RELOC_386_GLOB_DAT");
225 return &elf_howto_table
[R_386_GLOB_DAT
];
227 case BFD_RELOC_386_JUMP_SLOT
:
228 TRACE ("BFD_RELOC_386_JUMP_SLOT");
229 return &elf_howto_table
[R_386_JUMP_SLOT
];
231 case BFD_RELOC_386_RELATIVE
:
232 TRACE ("BFD_RELOC_386_RELATIVE");
233 return &elf_howto_table
[R_386_RELATIVE
];
235 case BFD_RELOC_386_GOTOFF
:
236 TRACE ("BFD_RELOC_386_GOTOFF");
237 return &elf_howto_table
[R_386_GOTOFF
];
239 case BFD_RELOC_386_GOTPC
:
240 TRACE ("BFD_RELOC_386_GOTPC");
241 return &elf_howto_table
[R_386_GOTPC
];
243 /* These relocs are a GNU extension. */
244 case BFD_RELOC_386_TLS_TPOFF
:
245 TRACE ("BFD_RELOC_386_TLS_TPOFF");
246 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
248 case BFD_RELOC_386_TLS_IE
:
249 TRACE ("BFD_RELOC_386_TLS_IE");
250 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
252 case BFD_RELOC_386_TLS_GOTIE
:
253 TRACE ("BFD_RELOC_386_TLS_GOTIE");
254 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
256 case BFD_RELOC_386_TLS_LE
:
257 TRACE ("BFD_RELOC_386_TLS_LE");
258 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
260 case BFD_RELOC_386_TLS_GD
:
261 TRACE ("BFD_RELOC_386_TLS_GD");
262 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
264 case BFD_RELOC_386_TLS_LDM
:
265 TRACE ("BFD_RELOC_386_TLS_LDM");
266 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
269 TRACE ("BFD_RELOC_16");
270 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
272 case BFD_RELOC_16_PCREL
:
273 TRACE ("BFD_RELOC_16_PCREL");
274 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
277 TRACE ("BFD_RELOC_8");
278 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
280 case BFD_RELOC_8_PCREL
:
281 TRACE ("BFD_RELOC_8_PCREL");
282 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
284 /* Common with Sun TLS implementation. */
285 case BFD_RELOC_386_TLS_LDO_32
:
286 TRACE ("BFD_RELOC_386_TLS_LDO_32");
287 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
289 case BFD_RELOC_386_TLS_IE_32
:
290 TRACE ("BFD_RELOC_386_TLS_IE_32");
291 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
293 case BFD_RELOC_386_TLS_LE_32
:
294 TRACE ("BFD_RELOC_386_TLS_LE_32");
295 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
297 case BFD_RELOC_386_TLS_DTPMOD32
:
298 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
299 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
301 case BFD_RELOC_386_TLS_DTPOFF32
:
302 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
303 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
305 case BFD_RELOC_386_TLS_TPOFF32
:
306 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
307 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
309 case BFD_RELOC_SIZE32
:
310 TRACE ("BFD_RELOC_SIZE32");
311 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
313 case BFD_RELOC_386_TLS_GOTDESC
:
314 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
315 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
317 case BFD_RELOC_386_TLS_DESC_CALL
:
318 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
319 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
321 case BFD_RELOC_386_TLS_DESC
:
322 TRACE ("BFD_RELOC_386_TLS_DESC");
323 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
325 case BFD_RELOC_386_IRELATIVE
:
326 TRACE ("BFD_RELOC_386_IRELATIVE");
327 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
329 case BFD_RELOC_386_GOT32X
:
330 TRACE ("BFD_RELOC_386_GOT32X");
331 return &elf_howto_table
[R_386_GOT32X
- R_386_tls_offset
];
333 case BFD_RELOC_VTABLE_INHERIT
:
334 TRACE ("BFD_RELOC_VTABLE_INHERIT");
335 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
337 case BFD_RELOC_VTABLE_ENTRY
:
338 TRACE ("BFD_RELOC_VTABLE_ENTRY");
339 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
343 /* xgettext:c-format */
344 _bfd_error_handler (_("%pB: unsupported relocation type: %#x"),
346 bfd_set_error (bfd_error_bad_value
);
351 static reloc_howto_type
*
352 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
357 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
358 if (elf_howto_table
[i
].name
!= NULL
359 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
360 return &elf_howto_table
[i
];
365 static reloc_howto_type
*
366 elf_i386_rtype_to_howto (unsigned r_type
)
370 if ((indx
= r_type
) >= R_386_standard
371 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
372 >= R_386_ext
- R_386_standard
)
373 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
374 >= R_386_ext2
- R_386_ext
)
375 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext2
376 >= R_386_vt
- R_386_ext2
))
378 /* PR 17512: file: 0f67f69d. */
379 if (elf_howto_table
[indx
].type
!= r_type
)
381 return &elf_howto_table
[indx
];
385 elf_i386_info_to_howto_rel (bfd
*abfd
,
387 Elf_Internal_Rela
*dst
)
389 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
391 if ((cache_ptr
->howto
= elf_i386_rtype_to_howto (r_type
)) == NULL
)
393 /* xgettext:c-format */
394 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
396 bfd_set_error (bfd_error_bad_value
);
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_scan_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 NULL
, /* plt_tlsdesc_entry */
763 0, /* plt_tlsdesc_entry_size*/
764 0, /* plt_tlsdesc_got1_offset */
765 0, /* plt_tlsdesc_got2_offset */
766 0, /* plt_tlsdesc_got1_insn_end */
767 0, /* plt_tlsdesc_got2_insn_end */
768 2, /* plt0_got1_offset */
769 8, /* plt0_got2_offset */
770 0, /* plt0_got2_insn_end */
771 2, /* plt_got_offset */
772 7, /* plt_reloc_offset */
773 12, /* plt_plt_offset */
774 0, /* plt_got_insn_size */
775 0, /* plt_plt_insn_end */
776 6, /* plt_lazy_offset */
777 elf_i386_pic_lazy_plt0_entry
, /* pic_plt0_entry */
778 elf_i386_pic_lazy_plt_entry
, /* pic_plt_entry */
779 elf_i386_eh_frame_lazy_plt
, /* eh_frame_plt */
780 sizeof (elf_i386_eh_frame_lazy_plt
) /* eh_frame_plt_size */
783 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt
=
785 elf_i386_non_lazy_plt_entry
, /* plt_entry */
786 elf_i386_pic_non_lazy_plt_entry
, /* pic_plt_entry */
787 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
788 2, /* plt_got_offset */
789 0, /* plt_got_insn_size */
790 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
791 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
794 static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt
=
796 elf_i386_lazy_ibt_plt0_entry
, /* plt0_entry */
797 sizeof (elf_i386_lazy_ibt_plt0_entry
), /* plt0_entry_size */
798 elf_i386_lazy_ibt_plt_entry
, /* plt_entry */
799 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
800 NULL
, /* plt_tlsdesc_entry */
801 0, /* plt_tlsdesc_entry_size*/
802 0, /* plt_tlsdesc_got1_offset */
803 0, /* plt_tlsdesc_got2_offset */
804 0, /* plt_tlsdesc_got1_insn_end */
805 0, /* plt_tlsdesc_got2_insn_end */
806 2, /* plt0_got1_offset */
807 8, /* plt0_got2_offset */
808 0, /* plt0_got2_insn_end */
809 4+2, /* plt_got_offset */
810 4+1, /* plt_reloc_offset */
811 4+6, /* plt_plt_offset */
812 0, /* plt_got_insn_size */
813 0, /* plt_plt_insn_end */
814 0, /* plt_lazy_offset */
815 elf_i386_pic_lazy_ibt_plt0_entry
, /* pic_plt0_entry */
816 elf_i386_lazy_ibt_plt_entry
, /* pic_plt_entry */
817 elf_i386_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
818 sizeof (elf_i386_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
821 static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt
=
823 elf_i386_non_lazy_ibt_plt_entry
, /* plt_entry */
824 elf_i386_pic_non_lazy_ibt_plt_entry
,/* pic_plt_entry */
825 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
826 4+2, /* plt_got_offset */
827 0, /* plt_got_insn_size */
828 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
829 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
833 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
834 for the PLTResolve stub and then for each PLT entry. */
835 #define PLTRESOLVE_RELOCS_SHLIB 0
836 #define PLTRESOLVE_RELOCS 2
837 #define PLT_NON_JUMP_SLOT_RELOCS 2
839 /* Return TRUE if the TLS access code sequence support transition
843 elf_i386_check_tls_transition (asection
*sec
,
845 Elf_Internal_Shdr
*symtab_hdr
,
846 struct elf_link_hash_entry
**sym_hashes
,
848 const Elf_Internal_Rela
*rel
,
849 const Elf_Internal_Rela
*relend
)
851 unsigned int val
, type
, reg
;
852 unsigned long r_symndx
;
853 struct elf_link_hash_entry
*h
;
858 offset
= rel
->r_offset
;
863 if (offset
< 2 || (rel
+ 1) >= relend
)
866 indirect_call
= false;
867 call
= contents
+ offset
+ 4;
870 if (r_type
== R_386_TLS_GD
)
872 /* Check transition from GD access model. Only
873 leal foo@tlsgd(,%ebx,1), %eax
874 call ___tls_get_addr@PLT
876 leal foo@tlsgd(%ebx) %eax
877 call ___tls_get_addr@PLT
880 leal foo@tlsgd(%reg), %eax
881 call *___tls_get_addr@GOT(%reg)
882 which may be converted to
883 addr32 call ___tls_get_addr
884 can transit to different access model. */
885 if ((offset
+ 10) > sec
->size
886 || (type
!= 0x8d && type
!= 0x04))
891 /* leal foo@tlsgd(,%ebx,1), %eax
892 call ___tls_get_addr@PLT */
896 if (*(call
- 7) != 0x8d
904 leal foo@tlsgd(%ebx), %eax
905 call ___tls_get_addr@PLT
908 leal foo@tlsgd(%reg), %eax
909 call *___tls_get_addr@GOT(%reg)
910 which may be converted to
911 addr32 call ___tls_get_addr
913 %eax can't be used as the GOT base register since it
914 is used to pass parameter to ___tls_get_addr. */
916 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
919 indirect_call
= call
[0] == 0xff;
920 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
921 && !(call
[0] == 0x67 && call
[1] == 0xe8)
923 && (call
[1] & 0xf8) == 0x90
924 && (call
[1] & 0x7) == reg
))
930 /* Check transition from LD access model. Only
931 leal foo@tlsldm(%ebx), %eax
932 call ___tls_get_addr@PLT
934 leal foo@tlsldm(%reg), %eax
935 call *___tls_get_addr@GOT(%reg)
936 which may be converted to
937 addr32 call ___tls_get_addr
938 can transit to different access model. */
939 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
942 /* %eax can't be used as the GOT base register since it is
943 used to pass parameter to ___tls_get_addr. */
945 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
948 indirect_call
= call
[0] == 0xff;
949 if (!(reg
== 3 && call
[0] == 0xe8)
950 && !(call
[0] == 0x67 && call
[1] == 0xe8)
952 && (call
[1] & 0xf8) == 0x90
953 && (call
[1] & 0x7) == reg
))
957 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
958 if (r_symndx
< symtab_hdr
->sh_info
)
961 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
963 || !((struct elf_x86_link_hash_entry
*) h
)->tls_get_addr
)
965 else if (indirect_call
)
966 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
968 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
969 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
972 /* Check transition from IE access model:
973 movl foo@indntpoff(%rip), %eax
974 movl foo@indntpoff(%rip), %reg
975 addl foo@indntpoff(%rip), %reg
978 if (offset
< 1 || (offset
+ 4) > sec
->size
)
981 /* Check "movl foo@tpoff(%rip), %eax" first. */
982 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
989 /* Check movl|addl foo@tpoff(%rip), %reg. */
990 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
991 return ((type
== 0x8b || type
== 0x03)
992 && (val
& 0xc7) == 0x05);
994 case R_386_TLS_GOTIE
:
995 case R_386_TLS_IE_32
:
996 /* Check transition from {IE_32,GOTIE} access model:
997 subl foo@{tpoff,gontoff}(%reg1), %reg2
998 movl foo@{tpoff,gontoff}(%reg1), %reg2
999 addl foo@{tpoff,gontoff}(%reg1), %reg2
1002 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1005 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1006 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1009 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1010 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1012 case R_386_TLS_GOTDESC
:
1013 /* Check transition from GDesc access model:
1014 leal x@tlsdesc(%ebx), %eax
1016 Make sure it's a leal adding ebx to a 32-bit offset
1017 into any register, although it's probably almost always
1020 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1023 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1026 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1027 return (val
& 0xc7) == 0x83;
1029 case R_386_TLS_DESC_CALL
:
1030 /* Check transition from GDesc access model:
1031 call *x@tlsdesc(%eax)
1033 if (offset
+ 2 <= sec
->size
)
1035 /* Make sure that it's a call *x@tlsdesc(%eax). */
1036 call
= contents
+ offset
;
1037 return call
[0] == 0xff && call
[1] == 0x10;
1047 /* Return TRUE if the TLS access transition is OK or no transition
1048 will be performed. Update R_TYPE if there is a transition. */
1051 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1052 asection
*sec
, bfd_byte
*contents
,
1053 Elf_Internal_Shdr
*symtab_hdr
,
1054 struct elf_link_hash_entry
**sym_hashes
,
1055 unsigned int *r_type
, int tls_type
,
1056 const Elf_Internal_Rela
*rel
,
1057 const Elf_Internal_Rela
*relend
,
1058 struct elf_link_hash_entry
*h
,
1059 unsigned long r_symndx
,
1060 bool from_relocate_section
)
1062 unsigned int from_type
= *r_type
;
1063 unsigned int to_type
= from_type
;
1066 /* Skip TLS transition for functions. */
1068 && (h
->type
== STT_FUNC
1069 || h
->type
== STT_GNU_IFUNC
))
1075 case R_386_TLS_GOTDESC
:
1076 case R_386_TLS_DESC_CALL
:
1077 case R_386_TLS_IE_32
:
1079 case R_386_TLS_GOTIE
:
1080 if (bfd_link_executable (info
))
1083 to_type
= R_386_TLS_LE_32
;
1084 else if (from_type
!= R_386_TLS_IE
1085 && from_type
!= R_386_TLS_GOTIE
)
1086 to_type
= R_386_TLS_IE_32
;
1089 /* When we are called from elf_i386_relocate_section, there may
1090 be additional transitions based on TLS_TYPE. */
1091 if (from_relocate_section
)
1093 unsigned int new_to_type
= to_type
;
1095 if (TLS_TRANSITION_IE_TO_LE_P (info
, h
, tls_type
))
1096 new_to_type
= R_386_TLS_LE_32
;
1098 if (to_type
== R_386_TLS_GD
1099 || to_type
== R_386_TLS_GOTDESC
1100 || to_type
== R_386_TLS_DESC_CALL
)
1102 if (tls_type
== GOT_TLS_IE_POS
)
1103 new_to_type
= R_386_TLS_GOTIE
;
1104 else if (tls_type
& GOT_TLS_IE
)
1105 new_to_type
= R_386_TLS_IE_32
;
1108 /* We checked the transition before when we were called from
1109 elf_i386_scan_relocs. We only want to check the new
1110 transition which hasn't been checked before. */
1111 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1112 to_type
= new_to_type
;
1118 if (bfd_link_executable (info
))
1119 to_type
= R_386_TLS_LE_32
;
1126 /* Return TRUE if there is no transition. */
1127 if (from_type
== to_type
)
1130 /* Check if the transition can be performed. */
1132 && ! elf_i386_check_tls_transition (sec
, contents
,
1133 symtab_hdr
, sym_hashes
,
1134 from_type
, rel
, relend
))
1136 reloc_howto_type
*from
, *to
;
1139 from
= elf_i386_rtype_to_howto (from_type
);
1140 to
= elf_i386_rtype_to_howto (to_type
);
1143 name
= h
->root
.root
.string
;
1146 struct elf_x86_link_hash_table
*htab
;
1148 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
1153 Elf_Internal_Sym
*isym
;
1155 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1157 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1162 /* xgettext:c-format */
1163 (_("%pB: TLS transition from %s to %s against `%s'"
1164 " at %#" PRIx64
" in section `%pA' failed"),
1165 abfd
, from
->name
, to
->name
, name
,
1166 (uint64_t) rel
->r_offset
, sec
);
1167 bfd_set_error (bfd_error_bad_value
);
1175 /* With the local symbol, foo, we convert
1176 mov foo@GOT[(%reg1)], %reg2
1178 lea foo[@GOTOFF(%reg1)], %reg2
1180 call/jmp *foo@GOT[(%reg)]
1182 nop call foo/jmp foo nop
1183 When PIC is false, convert
1184 test %reg1, foo@GOT[(%reg2)]
1188 binop foo@GOT[(%reg1)], %reg2
1191 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1196 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1198 unsigned int *r_type_p
,
1199 Elf_Internal_Rela
*irel
,
1200 struct elf_link_hash_entry
*h
,
1202 struct bfd_link_info
*link_info
)
1204 struct elf_x86_link_hash_table
*htab
;
1205 unsigned int opcode
;
1208 Elf_Internal_Sym
*isym
;
1209 unsigned int addend
;
1215 unsigned int r_type
;
1216 unsigned int r_symndx
;
1217 bfd_vma roff
= irel
->r_offset
;
1219 struct elf_x86_link_hash_entry
*eh
;
1224 /* Addend for R_386_GOT32X relocations must be 0. */
1225 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1229 htab
= elf_x86_hash_table (link_info
, I386_ELF_DATA
);
1230 is_pic
= bfd_link_pic (link_info
);
1233 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1235 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1236 baseless
= (modrm
& 0xc7) == 0x5;
1240 /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */
1241 local_ref
= SYMBOL_REFERENCES_LOCAL_P (link_info
, h
);
1243 abs_symbol
= ABS_SYMBOL_P (h
);
1248 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
, abfd
,
1250 abs_symbol
= isym
->st_shndx
== SHN_ABS
;
1253 if (baseless
&& is_pic
)
1255 /* For PIC, disallow R_386_GOT32X without a base register
1256 since we don't know what the GOT base is. */
1260 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1262 name
= h
->root
.root
.string
;
1265 /* xgettext:c-format */
1266 (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base"
1267 " register can not be used when making a shared object"),
1272 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1274 /* Convert to R_386_32 if PIC is false or there is no base
1276 to_reloc_32
= !is_pic
|| baseless
;
1278 eh
= elf_x86_hash_entry (h
);
1280 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1284 if (opcode
== 0x0ff)
1285 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1286 goto convert_branch
;
1288 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1289 "test %reg1, foo@GOT(%reg2)" and
1290 "binop foo@GOT[(%reg1)], %reg2". */
1294 /* Undefined weak symbol is only bound locally in executable
1295 and its reference is resolved as 0. */
1296 if (h
->root
.type
== bfd_link_hash_undefweak
1302 /* No direct branch to 0 for PIC. */
1306 goto convert_branch
;
1310 /* We can convert load of address 0 to R_386_32. */
1318 /* We have "call/jmp *foo@GOT[(%reg)]". */
1319 if ((h
->root
.type
== bfd_link_hash_defined
1320 || h
->root
.type
== bfd_link_hash_defweak
)
1323 /* The function is locally defined. */
1325 /* Convert R_386_GOT32X to R_386_PC32. */
1326 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1328 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1331 /* To support TLS optimization, always use addr32 prefix
1332 for "call *___tls_get_addr@GOT(%reg)". */
1333 if (eh
&& eh
->tls_get_addr
)
1336 nop_offset
= irel
->r_offset
- 2;
1340 nop
= htab
->params
->call_nop_byte
;
1341 if (htab
->params
->call_nop_as_suffix
)
1343 nop_offset
= roff
+ 3;
1344 irel
->r_offset
-= 1;
1347 nop_offset
= roff
- 2;
1352 /* Convert to "jmp foo nop". */
1355 nop_offset
= roff
+ 3;
1356 irel
->r_offset
-= 1;
1359 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1360 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1361 /* When converting to PC-relative relocation, we
1362 need to adjust addend by -4. */
1363 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1364 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1365 *r_type_p
= R_386_PC32
;
1371 /* We have "mov foo@GOT[(%re1g)], %reg2",
1372 "test %reg1, foo@GOT(%reg2)" and
1373 "binop foo@GOT[(%reg1)], %reg2".
1375 Avoid optimizing _DYNAMIC since ld.so may use its
1376 link-time address. */
1377 if (h
== htab
->elf
.hdynamic
)
1380 /* def_regular is set by an assignment in a linker script in
1381 bfd_elf_record_link_assignment. start_stop is set on
1382 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1386 || h
->root
.type
== bfd_link_hash_defined
1387 || h
->root
.type
== bfd_link_hash_defweak
)
1393 if (abs_symbol
&& local_ref
)
1398 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1399 "mov $foo, %reg2" with R_386_32. */
1401 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1402 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1407 /* Convert "mov foo@GOT(%reg1), %reg2" to
1408 "lea foo@GOTOFF(%reg1), %reg2". */
1409 r_type
= R_386_GOTOFF
;
1415 /* Only R_386_32 is supported. */
1421 /* Convert "test %reg1, foo@GOT(%reg2)" to
1422 "test $foo, %reg1". */
1423 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1428 /* Convert "binop foo@GOT(%reg1), %reg2" to
1429 "binop $foo, %reg2". */
1431 | (modrm
& 0x38) >> 3
1435 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1439 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1440 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1449 /* Look through the relocs for a section during the first phase, and
1450 calculate needed space in the global offset table, and procedure
1454 elf_i386_scan_relocs (bfd
*abfd
,
1455 struct bfd_link_info
*info
,
1457 const Elf_Internal_Rela
*relocs
)
1459 struct elf_x86_link_hash_table
*htab
;
1460 Elf_Internal_Shdr
*symtab_hdr
;
1461 struct elf_link_hash_entry
**sym_hashes
;
1462 const Elf_Internal_Rela
*rel
;
1463 const Elf_Internal_Rela
*rel_end
;
1467 if (bfd_link_relocatable (info
))
1470 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
1473 sec
->check_relocs_failed
= 1;
1477 BFD_ASSERT (is_x86_elf (abfd
, htab
));
1479 /* Get the section contents. */
1480 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1481 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1482 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1484 sec
->check_relocs_failed
= 1;
1488 symtab_hdr
= &elf_symtab_hdr (abfd
);
1489 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
;
1505 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1506 r_type
= ELF32_R_TYPE (rel
->r_info
);
1508 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1510 /* xgettext:c-format */
1511 _bfd_error_handler (_("%pB: bad symbol index: %d"),
1516 if (r_symndx
< symtab_hdr
->sh_info
)
1518 /* A local symbol. */
1519 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1524 /* Check relocation against local STT_GNU_IFUNC symbol. */
1525 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1527 h
= _bfd_elf_x86_get_local_sym_hash (htab
, abfd
, rel
, true);
1531 /* Fake a STT_GNU_IFUNC symbol. */
1532 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
1534 h
->type
= STT_GNU_IFUNC
;
1537 h
->forced_local
= 1;
1538 h
->root
.type
= bfd_link_hash_defined
;
1546 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1547 while (h
->root
.type
== bfd_link_hash_indirect
1548 || h
->root
.type
== bfd_link_hash_warning
)
1549 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1552 eh
= (struct elf_x86_link_hash_entry
*) h
;
1555 if (r_type
== R_386_GOTOFF
)
1558 /* It is referenced by a non-shared object. */
1562 if (r_type
== R_386_GOT32X
1563 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1565 Elf_Internal_Rela
*irel
= (Elf_Internal_Rela
*) rel
;
1566 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
1572 if (!_bfd_elf_x86_valid_reloc_p (sec
, info
, htab
, rel
, h
, isym
,
1573 symtab_hdr
, &no_dynreloc
))
1576 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
1577 symtab_hdr
, sym_hashes
,
1578 &r_type
, GOT_UNKNOWN
,
1579 rel
, rel_end
, h
, r_symndx
, false))
1582 /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */
1583 if (h
== htab
->elf
.hgot
)
1584 htab
->got_referenced
= true;
1589 htab
->tls_ld_or_ldm_got
.refcount
= 1;
1593 /* This symbol requires a procedure linkage table entry. We
1594 actually build the entry in adjust_dynamic_symbol,
1595 because this might be a case of linking PIC code which is
1596 never referenced by a dynamic object, in which case we
1597 don't need to generate a procedure linkage table entry
1600 /* If this is a local symbol, we resolve it directly without
1601 creating a procedure linkage table entry. */
1605 eh
->zero_undefweak
&= 0x2;
1607 h
->plt
.refcount
= 1;
1614 case R_386_TLS_IE_32
:
1616 case R_386_TLS_GOTIE
:
1617 if (!bfd_link_executable (info
))
1618 info
->flags
|= DF_STATIC_TLS
;
1624 case R_386_TLS_GOTDESC
:
1625 case R_386_TLS_DESC_CALL
:
1626 /* This symbol requires a global offset table entry. */
1628 int tls_type
, old_tls_type
;
1635 tls_type
= GOT_NORMAL
;
1637 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1638 case R_386_TLS_GOTDESC
:
1639 case R_386_TLS_DESC_CALL
:
1640 tls_type
= GOT_TLS_GDESC
; break;
1641 case R_386_TLS_IE_32
:
1642 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1643 tls_type
= GOT_TLS_IE_NEG
;
1645 /* If this is a GD->IE transition, we may use either of
1646 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1647 tls_type
= GOT_TLS_IE
;
1650 case R_386_TLS_GOTIE
:
1651 tls_type
= GOT_TLS_IE_POS
; break;
1656 h
->got
.refcount
= 1;
1657 old_tls_type
= elf_x86_hash_entry (h
)->tls_type
;
1661 bfd_signed_vma
*local_got_refcounts
;
1663 if (!elf_x86_allocate_local_got_info (abfd
,
1664 symtab_hdr
->sh_info
))
1667 /* This is a global offset table entry for a local symbol. */
1668 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1669 local_got_refcounts
[r_symndx
] = 1;
1670 old_tls_type
= elf_x86_local_got_tls_type (abfd
) [r_symndx
];
1673 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1674 tls_type
|= old_tls_type
;
1675 /* If a TLS symbol is accessed using IE at least once,
1676 there is no point to use dynamic model for it. */
1677 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1678 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1679 || (tls_type
& GOT_TLS_IE
) == 0))
1681 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1682 tls_type
= old_tls_type
;
1683 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1684 && GOT_TLS_GD_ANY_P (tls_type
))
1685 tls_type
|= old_tls_type
;
1689 name
= h
->root
.root
.string
;
1691 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1694 /* xgettext:c-format */
1695 (_("%pB: `%s' accessed both as normal and "
1696 "thread local symbol"),
1698 bfd_set_error (bfd_error_bad_value
);
1703 if (old_tls_type
!= tls_type
)
1706 elf_x86_hash_entry (h
)->tls_type
= tls_type
;
1708 elf_x86_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1716 if (r_type
!= R_386_TLS_IE
)
1720 eh
->zero_undefweak
&= 0x2;
1722 /* Need GOT to resolve undefined weak symbol to 0. */
1723 if (r_type
== R_386_GOTOFF
1724 && h
->root
.type
== bfd_link_hash_undefweak
1725 && bfd_link_executable (info
))
1726 htab
->got_referenced
= true;
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 bool 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 (_("%pB: 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 if (!elf_has_indirect_extern_access (sec
->owner
))
1793 eh
->non_got_ref_without_indirect_extern_access
= 1;
1795 /* We may need a .plt entry if the symbol is a function
1796 defined in a shared lib or is a function referenced
1797 from the code or read-only section. */
1799 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
1800 h
->plt
.refcount
= 1;
1807 && NEED_DYNAMIC_RELOCATION_P (false, info
, false, h
, sec
,
1810 struct elf_dyn_relocs
*p
;
1811 struct elf_dyn_relocs
**head
;
1813 /* If this is a global symbol, we count the number of
1814 relocations we need for this symbol. */
1817 head
= &h
->dyn_relocs
;
1821 /* Track dynamic relocs needed for local syms too.
1822 We really need local syms available to do this
1827 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1832 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1836 vpp
= &elf_section_data (s
)->local_dynrel
;
1837 head
= (struct elf_dyn_relocs
**)vpp
;
1841 if (p
== NULL
|| p
->sec
!= sec
)
1843 size_t amt
= sizeof *p
;
1844 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1856 /* Count size relocation as PC-relative relocation. */
1857 if (r_type
== R_386_PC32
|| size_reloc
)
1862 /* This relocation describes the C++ object vtable hierarchy.
1863 Reconstruct it for later use during GC. */
1864 case R_386_GNU_VTINHERIT
:
1865 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1869 /* This relocation describes which C++ vtable entries are actually
1870 used. Record for later use during GC. */
1871 case R_386_GNU_VTENTRY
:
1872 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1881 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1883 if (!converted
&& !_bfd_link_keep_memory (info
))
1887 /* Cache the section contents for elf_link_input_bfd if any
1888 load is converted or --no-keep-memory isn't used. */
1889 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1890 info
->cache_size
+= sec
->size
;
1894 /* Cache relocations if any load is converted. */
1895 if (elf_section_data (sec
)->relocs
!= relocs
&& converted
)
1896 elf_section_data (sec
)->relocs
= (Elf_Internal_Rela
*) relocs
;
1901 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
1903 sec
->check_relocs_failed
= 1;
1908 elf_i386_always_size_sections (bfd
*output_bfd
,
1909 struct bfd_link_info
*info
)
1913 /* Scan relocations after rel_from_abs has been set on __ehdr_start. */
1914 for (abfd
= info
->input_bfds
;
1915 abfd
!= (bfd
*) NULL
;
1916 abfd
= abfd
->link
.next
)
1917 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
1918 && !_bfd_elf_link_iterate_on_relocs (abfd
, info
,
1919 elf_i386_scan_relocs
))
1922 return _bfd_x86_elf_always_size_sections (output_bfd
, info
);
1925 /* Set the correct type for an x86 ELF section. We do this by the
1926 section name, which is a hack, but ought to work. */
1929 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
1930 Elf_Internal_Shdr
*hdr
,
1935 name
= bfd_section_name (sec
);
1937 /* This is an ugly, but unfortunately necessary hack that is
1938 needed when producing EFI binaries on x86. It tells
1939 elf.c:elf_fake_sections() not to consider ".reloc" as a section
1940 containing ELF relocation info. We need this hack in order to
1941 be able to generate ELF binaries that can be translated into
1942 EFI applications (which are essentially COFF objects). Those
1943 files contain a COFF ".reloc" section inside an ELFNN object,
1944 which would normally cause BFD to segfault because it would
1945 attempt to interpret this section as containing relocation
1946 entries for section "oc". With this hack enabled, ".reloc"
1947 will be treated as a normal data section, which will avoid the
1948 segfault. However, you won't be able to create an ELFNN binary
1949 with a section named "oc" that needs relocations, but that's
1950 the kind of ugly side-effects you get when detecting section
1951 types based on their names... In practice, this limitation is
1952 unlikely to bite. */
1953 if (strcmp (name
, ".reloc") == 0)
1954 hdr
->sh_type
= SHT_PROGBITS
;
1959 /* Return the relocation value for @tpoff relocation
1960 if STT_TLS virtual address is ADDRESS. */
1963 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
1965 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
1966 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
1967 bfd_vma static_tls_size
;
1969 /* If tls_sec is NULL, we should have signalled an error already. */
1970 if (htab
->tls_sec
== NULL
)
1973 /* Consider special static TLS alignment requirements. */
1974 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
1975 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
1978 /* Relocate an i386 ELF section. */
1981 elf_i386_relocate_section (bfd
*output_bfd
,
1982 struct bfd_link_info
*info
,
1984 asection
*input_section
,
1986 Elf_Internal_Rela
*relocs
,
1987 Elf_Internal_Sym
*local_syms
,
1988 asection
**local_sections
)
1990 struct elf_x86_link_hash_table
*htab
;
1991 Elf_Internal_Shdr
*symtab_hdr
;
1992 struct elf_link_hash_entry
**sym_hashes
;
1993 bfd_vma
*local_got_offsets
;
1994 bfd_vma
*local_tlsdesc_gotents
;
1995 Elf_Internal_Rela
*rel
;
1996 Elf_Internal_Rela
*wrel
;
1997 Elf_Internal_Rela
*relend
;
1998 bool is_vxworks_tls
;
1999 unsigned plt_entry_size
;
2001 /* Skip if check_relocs or scan_relocs failed. */
2002 if (input_section
->check_relocs_failed
)
2005 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
2009 if (!is_x86_elf (input_bfd
, htab
))
2011 bfd_set_error (bfd_error_wrong_format
);
2015 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2016 sym_hashes
= elf_sym_hashes (input_bfd
);
2017 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2018 local_tlsdesc_gotents
= elf_x86_local_tlsdesc_gotent (input_bfd
);
2019 /* We have to handle relocations in vxworks .tls_vars sections
2020 specially, because the dynamic loader is 'weird'. */
2021 is_vxworks_tls
= (htab
->elf
.target_os
== is_vxworks
2022 && bfd_link_pic (info
)
2023 && !strcmp (input_section
->output_section
->name
,
2026 _bfd_x86_elf_set_tls_module_base (info
);
2028 plt_entry_size
= htab
->plt
.plt_entry_size
;
2030 rel
= wrel
= relocs
;
2031 relend
= relocs
+ input_section
->reloc_count
;
2032 for (; rel
< relend
; wrel
++, rel
++)
2034 unsigned int r_type
, r_type_tls
;
2035 reloc_howto_type
*howto
;
2036 unsigned long r_symndx
;
2037 struct elf_link_hash_entry
*h
;
2038 struct elf_x86_link_hash_entry
*eh
;
2039 Elf_Internal_Sym
*sym
;
2041 bfd_vma off
, offplt
, plt_offset
;
2043 bool unresolved_reloc
;
2044 bfd_reloc_status_type r
;
2048 asection
*resolved_plt
;
2049 bool resolved_to_zero
;
2050 bool relative_reloc
;
2052 r_type
= ELF32_R_TYPE (rel
->r_info
);
2053 if (r_type
== R_386_GNU_VTINHERIT
2054 || r_type
== R_386_GNU_VTENTRY
)
2061 howto
= elf_i386_rtype_to_howto (r_type
);
2063 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
2065 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2069 unresolved_reloc
= false;
2070 if (r_symndx
< symtab_hdr
->sh_info
)
2072 sym
= local_syms
+ r_symndx
;
2073 sec
= local_sections
[r_symndx
];
2074 relocation
= (sec
->output_section
->vma
2075 + sec
->output_offset
2077 st_size
= sym
->st_size
;
2079 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2080 && ((sec
->flags
& SEC_MERGE
) != 0
2081 || (bfd_link_relocatable (info
)
2082 && sec
->output_offset
!= 0)))
2085 bfd_byte
*where
= contents
+ rel
->r_offset
;
2087 switch (howto
->size
)
2090 addend
= bfd_get_8 (input_bfd
, where
);
2091 if (howto
->pc_relative
)
2093 addend
= (addend
^ 0x80) - 0x80;
2098 addend
= bfd_get_16 (input_bfd
, where
);
2099 if (howto
->pc_relative
)
2101 addend
= (addend
^ 0x8000) - 0x8000;
2106 addend
= bfd_get_32 (input_bfd
, where
);
2107 if (howto
->pc_relative
)
2109 addend
= (addend
^ 0x80000000) - 0x80000000;
2117 if (bfd_link_relocatable (info
))
2118 addend
+= sec
->output_offset
;
2121 asection
*msec
= sec
;
2122 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2124 addend
-= relocation
;
2125 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2128 switch (howto
->size
)
2131 /* FIXME: overflow checks. */
2132 if (howto
->pc_relative
)
2134 bfd_put_8 (input_bfd
, addend
, where
);
2137 if (howto
->pc_relative
)
2139 bfd_put_16 (input_bfd
, addend
, where
);
2142 if (howto
->pc_relative
)
2144 bfd_put_32 (input_bfd
, addend
, where
);
2148 else if (!bfd_link_relocatable (info
)
2149 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2151 /* Relocate against local STT_GNU_IFUNC symbol. */
2152 h
= _bfd_elf_x86_get_local_sym_hash (htab
, input_bfd
, rel
,
2157 /* Set STT_GNU_IFUNC symbol value. */
2158 h
->root
.u
.def
.value
= sym
->st_value
;
2159 h
->root
.u
.def
.section
= sec
;
2164 bool warned ATTRIBUTE_UNUSED
;
2165 bool ignored ATTRIBUTE_UNUSED
;
2167 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2168 r_symndx
, symtab_hdr
, sym_hashes
,
2170 unresolved_reloc
, warned
, ignored
);
2174 if (sec
!= NULL
&& discarded_section (sec
))
2176 _bfd_clear_contents (howto
, input_bfd
, input_section
,
2177 contents
, rel
->r_offset
);
2178 wrel
->r_offset
= rel
->r_offset
;
2182 /* For ld -r, remove relocations in debug sections against
2183 sections defined in discarded sections. Not done for
2184 eh_frame editing code expects to be present. */
2185 if (bfd_link_relocatable (info
)
2186 && (input_section
->flags
& SEC_DEBUGGING
))
2192 if (bfd_link_relocatable (info
))
2199 eh
= (struct elf_x86_link_hash_entry
*) h
;
2201 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2202 it here if it is defined in a non-shared object. */
2204 && h
->type
== STT_GNU_IFUNC
2207 asection
*gotplt
, *base_got
;
2211 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2213 /* If this is a SHT_NOTE section without SHF_ALLOC, treat
2214 STT_GNU_IFUNC symbol as STT_FUNC. */
2215 if (elf_section_type (input_section
) == SHT_NOTE
)
2217 /* Dynamic relocs are not propagated for SEC_DEBUGGING
2218 sections because such sections are not SEC_ALLOC and
2219 thus ld.so will not process them. */
2220 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
2225 /* STT_GNU_IFUNC symbol must go through PLT. */
2226 if (htab
->elf
.splt
!= NULL
)
2228 if (htab
->plt_second
!= NULL
)
2230 resolved_plt
= htab
->plt_second
;
2231 plt_offset
= eh
->plt_second
.offset
;
2235 resolved_plt
= htab
->elf
.splt
;
2236 plt_offset
= h
->plt
.offset
;
2238 gotplt
= htab
->elf
.sgotplt
;
2242 resolved_plt
= htab
->elf
.iplt
;
2243 plt_offset
= h
->plt
.offset
;
2244 gotplt
= htab
->elf
.igotplt
;
2254 base_got
= htab
->elf
.sgot
;
2255 off
= h
->got
.offset
;
2257 if (base_got
== NULL
)
2260 if (off
== (bfd_vma
) -1)
2262 /* We can't use h->got.offset here to save state, or
2263 even just remember the offset, as finish_dynamic_symbol
2264 would use that as offset into .got. */
2266 if (h
->plt
.offset
== (bfd_vma
) -1)
2269 if (htab
->elf
.splt
!= NULL
)
2271 plt_index
= (h
->plt
.offset
/ plt_entry_size
2272 - htab
->plt
.has_plt0
);
2273 off
= (plt_index
+ 3) * 4;
2274 base_got
= htab
->elf
.sgotplt
;
2278 plt_index
= h
->plt
.offset
/ plt_entry_size
;
2279 off
= plt_index
* 4;
2280 base_got
= htab
->elf
.igotplt
;
2283 if (h
->dynindx
== -1
2287 /* This references the local defitionion. We must
2288 initialize this entry in the global offset table.
2289 Since the offset must always be a multiple of 4,
2290 we use the least significant bit to record
2291 whether we have initialized it already.
2293 When doing a dynamic link, we create a .rela.got
2294 relocation entry to initialize the value. This
2295 is done in the finish_dynamic_symbol routine. */
2300 bfd_put_32 (output_bfd
, relocation
,
2301 base_got
->contents
+ off
);
2309 relocation
= (base_got
->output_section
->vma
2310 + base_got
->output_offset
+ off
2311 - gotplt
->output_section
->vma
2312 - gotplt
->output_offset
);
2314 if (rel
->r_offset
> 1
2315 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
2316 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
2318 if (bfd_link_pic (info
))
2319 goto disallow_got32
;
2321 /* Add the GOT base if there is no base register. */
2322 relocation
+= (gotplt
->output_section
->vma
2323 + gotplt
->output_offset
);
2325 else if (htab
->elf
.splt
== NULL
)
2327 /* Adjust for static executables. */
2328 relocation
+= gotplt
->output_offset
;
2334 if (h
->plt
.offset
== (bfd_vma
) -1)
2336 /* Handle static pointers of STT_GNU_IFUNC symbols. */
2337 if (r_type
== R_386_32
2338 && (input_section
->flags
& SEC_CODE
) == 0)
2339 goto do_ifunc_pointer
;
2340 goto bad_ifunc_reloc
;
2343 relocation
= (resolved_plt
->output_section
->vma
2344 + resolved_plt
->output_offset
+ plt_offset
);
2350 if (h
->root
.root
.string
)
2351 name
= h
->root
.root
.string
;
2353 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2356 /* xgettext:c-format */
2357 (_("%pB: relocation %s against STT_GNU_IFUNC "
2358 "symbol `%s' isn't supported"), input_bfd
,
2360 bfd_set_error (bfd_error_bad_value
);
2364 /* Generate dynamic relcoation only when there is a
2365 non-GOT reference in a shared object. */
2366 if ((bfd_link_pic (info
) && h
->non_got_ref
)
2367 || h
->plt
.offset
== (bfd_vma
) -1)
2369 Elf_Internal_Rela outrel
;
2374 /* Need a dynamic relocation to get the real function
2376 offset
= _bfd_elf_section_offset (output_bfd
,
2380 if (offset
== (bfd_vma
) -1
2381 || offset
== (bfd_vma
) -2)
2384 outrel
.r_offset
= (input_section
->output_section
->vma
2385 + input_section
->output_offset
2388 if (POINTER_LOCAL_IFUNC_P (info
, h
))
2390 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
2391 h
->root
.root
.string
,
2392 h
->root
.u
.def
.section
->owner
);
2394 /* This symbol is resolved locally. */
2395 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
2397 if (htab
->params
->report_relative_reloc
)
2398 _bfd_x86_elf_link_report_relative_reloc
2399 (info
, input_section
, h
, sym
,
2400 "R_386_IRELATIVE", &outrel
);
2402 bfd_put_32 (output_bfd
,
2403 (h
->root
.u
.def
.value
2404 + h
->root
.u
.def
.section
->output_section
->vma
2405 + h
->root
.u
.def
.section
->output_offset
),
2409 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2411 /* Dynamic relocations are stored in
2412 1. .rel.ifunc section in PIC object.
2413 2. .rel.got section in dynamic executable.
2414 3. .rel.iplt section in static executable. */
2415 if (bfd_link_pic (info
))
2416 sreloc
= htab
->elf
.irelifunc
;
2417 else if (htab
->elf
.splt
!= NULL
)
2418 sreloc
= htab
->elf
.srelgot
;
2420 sreloc
= htab
->elf
.irelplt
;
2421 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2423 /* If this reloc is against an external symbol, we
2424 do not want to fiddle with the addend. Otherwise,
2425 we need to include the symbol value so that it
2426 becomes an addend for the dynamic reloc. For an
2427 internal symbol, we have updated addend. */
2436 relocation
-= (gotplt
->output_section
->vma
2437 + gotplt
->output_offset
);
2443 resolved_to_zero
= (eh
!= NULL
2444 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
2450 /* Relocation is to the entry for this symbol in the global
2452 if (htab
->elf
.sgot
== NULL
)
2455 relative_reloc
= false;
2458 off
= h
->got
.offset
;
2459 if (RESOLVED_LOCALLY_P (info
, h
, htab
))
2461 /* We must initialize this entry in the global offset
2462 table. Since the offset must always be a multiple
2463 of 4, we use the least significant bit to record
2464 whether we have initialized it already.
2466 When doing a dynamic link, we create a .rel.got
2467 relocation entry to initialize the value. This
2468 is done in the finish_dynamic_symbol routine. */
2473 bfd_put_32 (output_bfd
, relocation
,
2474 htab
->elf
.sgot
->contents
+ off
);
2477 if (GENERATE_RELATIVE_RELOC_P (info
, h
))
2479 /* PR ld/21402: If this symbol isn't dynamic
2480 in PIC, generate R_386_RELATIVE here. */
2481 eh
->no_finish_dynamic_symbol
= 1;
2482 relative_reloc
= true;
2487 unresolved_reloc
= false;
2491 if (local_got_offsets
== NULL
)
2494 off
= local_got_offsets
[r_symndx
];
2496 /* The offset must always be a multiple of 4. We use
2497 the least significant bit to record whether we have
2498 already generated the necessary reloc. */
2503 bfd_put_32 (output_bfd
, relocation
,
2504 htab
->elf
.sgot
->contents
+ off
);
2505 local_got_offsets
[r_symndx
] |= 1;
2507 if (bfd_link_pic (info
))
2508 relative_reloc
= true;
2515 Elf_Internal_Rela outrel
;
2517 s
= htab
->elf
.srelgot
;
2521 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2522 + htab
->elf
.sgot
->output_offset
2524 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2526 if (htab
->params
->report_relative_reloc
)
2527 _bfd_x86_elf_link_report_relative_reloc
2528 (info
, input_section
, h
, sym
, "R_386_RELATIVE",
2531 elf_append_rel (output_bfd
, s
, &outrel
);
2534 if (off
>= (bfd_vma
) -2)
2537 relocation
= (htab
->elf
.sgot
->output_section
->vma
2538 + htab
->elf
.sgot
->output_offset
+ off
);
2539 if (rel
->r_offset
> 1
2540 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
2541 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
2543 if (bfd_link_pic (info
))
2545 /* For PIC, disallow R_386_GOT32 without a base
2546 register, except for "lea foo@GOT, %reg", since
2547 we don't know what the GOT base is. */
2551 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
2552 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
2555 name
= h
->root
.root
.string
;
2558 /* xgettext:c-format */
2559 (_("%pB: direct GOT relocation %s against `%s'"
2560 " without base register can not be used"
2561 " when making a shared object"),
2562 input_bfd
, howto
->name
, name
);
2563 bfd_set_error (bfd_error_bad_value
);
2569 /* Subtract the .got.plt section address only with a base
2571 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
2572 + htab
->elf
.sgotplt
->output_offset
);
2578 /* Relocation is relative to the start of the global offset
2581 /* Check to make sure it isn't a protected function or data
2582 symbol for shared library since it may not be local when
2583 used as function address or with copy relocation. We also
2584 need to make sure that a symbol is referenced locally. */
2585 if (!bfd_link_executable (info
) && h
)
2587 if (!h
->def_regular
)
2591 switch (ELF_ST_VISIBILITY (h
->other
))
2594 v
= _("hidden symbol");
2597 v
= _("internal symbol");
2600 v
= _("protected symbol");
2608 /* xgettext:c-format */
2609 (_("%pB: relocation R_386_GOTOFF against undefined %s"
2610 " `%s' can not be used when making a shared object"),
2611 input_bfd
, v
, h
->root
.root
.string
);
2612 bfd_set_error (bfd_error_bad_value
);
2615 else if (!SYMBOL_REFERENCES_LOCAL_P (info
, h
)
2616 && (h
->type
== STT_FUNC
2617 || h
->type
== STT_OBJECT
)
2618 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2621 /* xgettext:c-format */
2622 (_("%pB: relocation R_386_GOTOFF against protected %s"
2623 " `%s' can not be used when making a shared object"),
2625 h
->type
== STT_FUNC
? "function" : "data",
2626 h
->root
.root
.string
);
2627 bfd_set_error (bfd_error_bad_value
);
2632 /* Note that sgot is not involved in this
2633 calculation. We always want the start of .got.plt. If we
2634 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2635 permitted by the ABI, we might have to change this
2637 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
2638 + htab
->elf
.sgotplt
->output_offset
;
2642 /* Use global offset table as symbol value. */
2643 relocation
= htab
->elf
.sgotplt
->output_section
->vma
2644 + htab
->elf
.sgotplt
->output_offset
;
2645 unresolved_reloc
= false;
2649 /* Relocation is to the entry for this symbol in the
2650 procedure linkage table. */
2652 /* Resolve a PLT32 reloc against a local symbol directly,
2653 without using the procedure linkage table. */
2657 if ((h
->plt
.offset
== (bfd_vma
) -1
2658 && eh
->plt_got
.offset
== (bfd_vma
) -1)
2659 || htab
->elf
.splt
== NULL
)
2661 /* We didn't make a PLT entry for this symbol. This
2662 happens when statically linking PIC code, or when
2663 using -Bsymbolic. */
2667 if (h
->plt
.offset
!= (bfd_vma
) -1)
2669 if (htab
->plt_second
!= NULL
)
2671 resolved_plt
= htab
->plt_second
;
2672 plt_offset
= eh
->plt_second
.offset
;
2676 resolved_plt
= htab
->elf
.splt
;
2677 plt_offset
= h
->plt
.offset
;
2682 resolved_plt
= htab
->plt_got
;
2683 plt_offset
= eh
->plt_got
.offset
;
2686 relocation
= (resolved_plt
->output_section
->vma
2687 + resolved_plt
->output_offset
2689 unresolved_reloc
= false;
2693 /* Set to symbol size. */
2694 relocation
= st_size
;
2699 if ((input_section
->flags
& SEC_ALLOC
) == 0
2703 if (GENERATE_DYNAMIC_RELOCATION_P (false, info
, eh
, r_type
,
2706 (r_type
== R_386_PC32
)))
2708 Elf_Internal_Rela outrel
;
2709 bool skip
, relocate
;
2712 /* When generating a shared object, these relocations
2713 are copied into the output file to be resolved at run
2720 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2722 if (outrel
.r_offset
== (bfd_vma
) -1)
2724 else if (outrel
.r_offset
== (bfd_vma
) -2)
2725 skip
= true, relocate
= true;
2726 outrel
.r_offset
+= (input_section
->output_section
->vma
2727 + input_section
->output_offset
);
2730 memset (&outrel
, 0, sizeof outrel
);
2731 else if (COPY_INPUT_RELOC_P (false, info
, h
, r_type
))
2732 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2735 /* This symbol is local, or marked to become local. */
2737 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2739 if (htab
->params
->report_relative_reloc
)
2740 _bfd_x86_elf_link_report_relative_reloc
2741 (info
, input_section
, h
, sym
, "R_386_RELATIVE",
2745 sreloc
= elf_section_data (input_section
)->sreloc
;
2747 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
2749 r
= bfd_reloc_notsupported
;
2750 goto check_relocation_error
;
2753 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2755 /* If this reloc is against an external symbol, we do
2756 not want to fiddle with the addend. Otherwise, we
2757 need to include the symbol value so that it becomes
2758 an addend for the dynamic reloc. */
2765 if (!bfd_link_executable (info
))
2767 Elf_Internal_Rela outrel
;
2770 outrel
.r_offset
= rel
->r_offset
2771 + input_section
->output_section
->vma
2772 + input_section
->output_offset
;
2773 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2775 if (htab
->params
->report_relative_reloc
)
2776 _bfd_x86_elf_link_report_relative_reloc
2777 (info
, input_section
, h
, sym
, "R_386_RELATIVE",
2780 sreloc
= elf_section_data (input_section
)->sreloc
;
2783 elf_append_rel (output_bfd
, sreloc
, &outrel
);
2788 case R_386_TLS_GOTDESC
:
2789 case R_386_TLS_DESC_CALL
:
2790 case R_386_TLS_IE_32
:
2791 case R_386_TLS_GOTIE
:
2792 tls_type
= GOT_UNKNOWN
;
2793 if (h
== NULL
&& local_got_offsets
)
2794 tls_type
= elf_x86_local_got_tls_type (input_bfd
) [r_symndx
];
2796 tls_type
= elf_x86_hash_entry(h
)->tls_type
;
2797 if (tls_type
== GOT_TLS_IE
)
2798 tls_type
= GOT_TLS_IE_NEG
;
2800 r_type_tls
= r_type
;
2801 if (! elf_i386_tls_transition (info
, input_bfd
,
2802 input_section
, contents
,
2803 symtab_hdr
, sym_hashes
,
2804 &r_type_tls
, tls_type
, rel
,
2805 relend
, h
, r_symndx
, true))
2808 if (r_type_tls
== R_386_TLS_LE_32
)
2810 BFD_ASSERT (! unresolved_reloc
);
2811 if (r_type
== R_386_TLS_GD
)
2816 /* GD->LE transition. */
2817 type
= *(contents
+ rel
->r_offset
- 2);
2821 leal foo@tlsgd(,%ebx,1), %eax
2822 call ___tls_get_addr@PLT
2825 subl $foo@tpoff, %eax
2826 (6 byte form of subl). */
2827 roff
= rel
->r_offset
+ 5;
2832 leal foo@tlsgd(%ebx), %eax
2833 call ___tls_get_addr@PLT
2836 leal foo@tlsgd(%reg), %eax
2837 call *___tls_get_addr@GOT(%reg)
2838 which may be converted to
2839 addr32 call ___tls_get_addr
2841 movl %gs:0, %eax; subl $foo@tpoff, %eax
2842 (6 byte form of subl). */
2843 roff
= rel
->r_offset
+ 6;
2845 memcpy (contents
+ roff
- 8,
2846 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2847 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
2849 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
2854 else if (r_type
== R_386_TLS_GOTDESC
)
2856 /* GDesc -> LE transition.
2857 It's originally something like:
2858 leal x@tlsdesc(%ebx), %eax
2862 Registers other than %eax may be set up here. */
2867 roff
= rel
->r_offset
;
2868 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
2870 /* Now modify the instruction as appropriate. */
2871 /* aoliva FIXME: remove the above and xor the byte
2873 bfd_put_8 (output_bfd
, val
^ 0x86,
2874 contents
+ roff
- 1);
2875 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
2879 else if (r_type
== R_386_TLS_DESC_CALL
)
2881 /* GDesc -> LE transition.
2889 roff
= rel
->r_offset
;
2890 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
2891 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
2894 else if (r_type
== R_386_TLS_IE
)
2898 /* IE->LE transition:
2899 Originally it can be one of:
2907 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2910 /* movl foo, %eax. */
2911 bfd_put_8 (output_bfd
, 0xb8,
2912 contents
+ rel
->r_offset
- 1);
2918 type
= bfd_get_8 (input_bfd
,
2919 contents
+ rel
->r_offset
- 2);
2924 bfd_put_8 (output_bfd
, 0xc7,
2925 contents
+ rel
->r_offset
- 2);
2926 bfd_put_8 (output_bfd
,
2927 0xc0 | ((val
>> 3) & 7),
2928 contents
+ rel
->r_offset
- 1);
2932 bfd_put_8 (output_bfd
, 0x81,
2933 contents
+ rel
->r_offset
- 2);
2934 bfd_put_8 (output_bfd
,
2935 0xc0 | ((val
>> 3) & 7),
2936 contents
+ rel
->r_offset
- 1);
2943 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
2944 contents
+ rel
->r_offset
);
2949 unsigned int val
, type
;
2951 /* {IE_32,GOTIE}->LE transition:
2952 Originally it can be one of:
2953 subl foo(%reg1), %reg2
2954 movl foo(%reg1), %reg2
2955 addl foo(%reg1), %reg2
2958 movl $foo, %reg2 (6 byte form)
2959 addl $foo, %reg2. */
2960 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2961 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2965 bfd_put_8 (output_bfd
, 0xc7,
2966 contents
+ rel
->r_offset
- 2);
2967 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2968 contents
+ rel
->r_offset
- 1);
2970 else if (type
== 0x2b)
2973 bfd_put_8 (output_bfd
, 0x81,
2974 contents
+ rel
->r_offset
- 2);
2975 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2976 contents
+ rel
->r_offset
- 1);
2978 else if (type
== 0x03)
2981 bfd_put_8 (output_bfd
, 0x81,
2982 contents
+ rel
->r_offset
- 2);
2983 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2984 contents
+ rel
->r_offset
- 1);
2988 if (r_type
== R_386_TLS_GOTIE
)
2989 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
2990 contents
+ rel
->r_offset
);
2992 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
2993 contents
+ rel
->r_offset
);
2998 if (htab
->elf
.sgot
== NULL
)
3003 off
= h
->got
.offset
;
3004 offplt
= elf_x86_hash_entry (h
)->tlsdesc_got
;
3008 if (local_got_offsets
== NULL
)
3011 off
= local_got_offsets
[r_symndx
];
3012 offplt
= local_tlsdesc_gotents
[r_symndx
];
3019 Elf_Internal_Rela outrel
;
3023 if (htab
->elf
.srelgot
== NULL
)
3026 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3028 if (GOT_TLS_GDESC_P (tls_type
))
3031 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3032 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3033 <= htab
->elf
.sgotplt
->size
);
3034 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3035 + htab
->elf
.sgotplt
->output_offset
3037 + htab
->sgotplt_jump_table_size
);
3038 sreloc
= htab
->elf
.srelplt
;
3039 loc
= sreloc
->contents
;
3040 loc
+= (htab
->next_tls_desc_index
++
3041 * sizeof (Elf32_External_Rel
));
3042 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3043 <= sreloc
->contents
+ sreloc
->size
);
3044 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3047 BFD_ASSERT (! unresolved_reloc
);
3048 bfd_put_32 (output_bfd
,
3049 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3050 htab
->elf
.sgotplt
->contents
+ offplt
3051 + htab
->sgotplt_jump_table_size
+ 4);
3055 bfd_put_32 (output_bfd
, 0,
3056 htab
->elf
.sgotplt
->contents
+ offplt
3057 + htab
->sgotplt_jump_table_size
+ 4);
3061 sreloc
= htab
->elf
.srelgot
;
3063 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3064 + htab
->elf
.sgot
->output_offset
+ off
);
3066 if (GOT_TLS_GD_P (tls_type
))
3067 dr_type
= R_386_TLS_DTPMOD32
;
3068 else if (GOT_TLS_GDESC_P (tls_type
))
3070 else if (tls_type
== GOT_TLS_IE_POS
)
3071 dr_type
= R_386_TLS_TPOFF
;
3073 dr_type
= R_386_TLS_TPOFF32
;
3075 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3076 bfd_put_32 (output_bfd
,
3077 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3078 htab
->elf
.sgot
->contents
+ off
);
3079 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3080 bfd_put_32 (output_bfd
,
3081 _bfd_x86_elf_dtpoff_base (info
) - relocation
,
3082 htab
->elf
.sgot
->contents
+ off
);
3083 else if (dr_type
!= R_386_TLS_DESC
)
3084 bfd_put_32 (output_bfd
, 0,
3085 htab
->elf
.sgot
->contents
+ off
);
3086 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3088 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3090 if (GOT_TLS_GD_P (tls_type
))
3094 BFD_ASSERT (! unresolved_reloc
);
3095 bfd_put_32 (output_bfd
,
3096 relocation
- _bfd_x86_elf_dtpoff_base (info
),
3097 htab
->elf
.sgot
->contents
+ off
+ 4);
3101 bfd_put_32 (output_bfd
, 0,
3102 htab
->elf
.sgot
->contents
+ off
+ 4);
3103 outrel
.r_info
= ELF32_R_INFO (indx
,
3104 R_386_TLS_DTPOFF32
);
3105 outrel
.r_offset
+= 4;
3106 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3109 else if (tls_type
== GOT_TLS_IE_BOTH
)
3111 bfd_put_32 (output_bfd
,
3113 ? relocation
- _bfd_x86_elf_dtpoff_base (info
)
3115 htab
->elf
.sgot
->contents
+ off
+ 4);
3116 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3117 outrel
.r_offset
+= 4;
3118 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3125 local_got_offsets
[r_symndx
] |= 1;
3128 if (off
>= (bfd_vma
) -2
3129 && ! GOT_TLS_GDESC_P (tls_type
))
3131 if (r_type_tls
== R_386_TLS_GOTDESC
3132 || r_type_tls
== R_386_TLS_DESC_CALL
)
3134 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3135 unresolved_reloc
= false;
3137 else if (r_type_tls
== r_type
)
3139 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3140 + htab
->elf
.sgotplt
->output_offset
;
3141 relocation
= htab
->elf
.sgot
->output_section
->vma
3142 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3143 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3144 && tls_type
== GOT_TLS_IE_BOTH
)
3146 if (r_type
== R_386_TLS_IE
)
3147 relocation
+= g_o_t
;
3148 unresolved_reloc
= false;
3150 else if (r_type
== R_386_TLS_GD
)
3152 unsigned int val
, type
;
3155 /* GD->IE transition. */
3156 type
= *(contents
+ rel
->r_offset
- 2);
3157 val
= *(contents
+ rel
->r_offset
- 1);
3161 leal foo@tlsgd(,%ebx,1), %eax
3162 call ___tls_get_addr@PLT
3165 subl $foo@gottpoff(%ebx), %eax. */
3167 roff
= rel
->r_offset
- 3;
3172 leal foo@tlsgd(%ebx), %eax
3173 call ___tls_get_addr@PLT
3176 leal foo@tlsgd(%reg), %eax
3177 call *___tls_get_addr@GOT(%reg)
3178 which may be converted to
3179 addr32 call ___tls_get_addr
3182 subl $foo@gottpoff(%reg), %eax. */
3183 roff
= rel
->r_offset
- 2;
3185 memcpy (contents
+ roff
,
3186 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3187 contents
[roff
+ 7] = 0x80 | (val
& 7);
3188 /* If foo is used only with foo@gotntpoff(%reg) and
3189 foo@indntpoff, but not with foo@gottpoff(%reg), change
3190 subl $foo@gottpoff(%reg), %eax
3192 addl $foo@gotntpoff(%reg), %eax. */
3193 if (tls_type
== GOT_TLS_IE_POS
)
3194 contents
[roff
+ 6] = 0x03;
3195 bfd_put_32 (output_bfd
,
3196 htab
->elf
.sgot
->output_section
->vma
3197 + htab
->elf
.sgot
->output_offset
+ off
3198 - htab
->elf
.sgotplt
->output_section
->vma
3199 - htab
->elf
.sgotplt
->output_offset
,
3200 contents
+ roff
+ 8);
3201 /* Skip R_386_PLT32 and R_386_GOT32X. */
3206 else if (r_type
== R_386_TLS_GOTDESC
)
3208 /* GDesc -> IE transition.
3209 It's originally something like:
3210 leal x@tlsdesc(%ebx), %eax
3213 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3215 movl x@gottpoff(%ebx), %eax # before negl %eax
3217 Registers other than %eax may be set up here. */
3221 /* First, make sure it's a leal adding ebx to a 32-bit
3222 offset into any register, although it's probably
3223 almost always going to be eax. */
3224 roff
= rel
->r_offset
;
3226 /* Now modify the instruction as appropriate. */
3227 /* To turn a leal into a movl in the form we use it, it
3228 suffices to change the first byte from 0x8d to 0x8b.
3229 aoliva FIXME: should we decide to keep the leal, all
3230 we have to do is remove the statement below, and
3231 adjust the relaxation of R_386_TLS_DESC_CALL. */
3232 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3234 if (tls_type
== GOT_TLS_IE_BOTH
)
3237 bfd_put_32 (output_bfd
,
3238 htab
->elf
.sgot
->output_section
->vma
3239 + htab
->elf
.sgot
->output_offset
+ off
3240 - htab
->elf
.sgotplt
->output_section
->vma
3241 - htab
->elf
.sgotplt
->output_offset
,
3245 else if (r_type
== R_386_TLS_DESC_CALL
)
3247 /* GDesc -> IE transition.
3255 depending on how we transformed the TLS_GOTDESC above.
3260 roff
= rel
->r_offset
;
3262 /* Now modify the instruction as appropriate. */
3263 if (tls_type
!= GOT_TLS_IE_NEG
)
3266 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3267 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3272 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3273 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3283 if (! elf_i386_tls_transition (info
, input_bfd
,
3284 input_section
, contents
,
3285 symtab_hdr
, sym_hashes
,
3286 &r_type
, GOT_UNKNOWN
, rel
,
3287 relend
, h
, r_symndx
, true))
3290 if (r_type
!= R_386_TLS_LDM
)
3292 /* LD->LE transition. Change
3293 leal foo@tlsldm(%ebx) %eax
3294 call ___tls_get_addr@PLT
3298 leal 0(%esi,1), %esi
3300 leal foo@tlsldm(%reg) %eax
3301 call *___tls_get_addr@GOT(%reg)
3302 which may be converted to
3303 addr32 call ___tls_get_addr
3306 leal 0(%esi), %esi */
3307 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3308 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
3309 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
3310 memcpy (contents
+ rel
->r_offset
- 2,
3311 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
3313 memcpy (contents
+ rel
->r_offset
- 2,
3314 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3315 /* Skip R_386_PC32/R_386_PLT32. */
3321 if (htab
->elf
.sgot
== NULL
)
3324 off
= htab
->tls_ld_or_ldm_got
.offset
;
3329 Elf_Internal_Rela outrel
;
3331 if (htab
->elf
.srelgot
== NULL
)
3334 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3335 + htab
->elf
.sgot
->output_offset
+ off
);
3337 bfd_put_32 (output_bfd
, 0,
3338 htab
->elf
.sgot
->contents
+ off
);
3339 bfd_put_32 (output_bfd
, 0,
3340 htab
->elf
.sgot
->contents
+ off
+ 4);
3341 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3342 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
3343 htab
->tls_ld_or_ldm_got
.offset
|= 1;
3345 relocation
= htab
->elf
.sgot
->output_section
->vma
3346 + htab
->elf
.sgot
->output_offset
+ off
3347 - htab
->elf
.sgotplt
->output_section
->vma
3348 - htab
->elf
.sgotplt
->output_offset
;
3349 unresolved_reloc
= false;
3352 case R_386_TLS_LDO_32
:
3353 if (!bfd_link_executable (info
)
3354 || (input_section
->flags
& SEC_CODE
) == 0)
3355 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3357 /* When converting LDO to LE, we must negate. */
3358 relocation
= -elf_i386_tpoff (info
, relocation
);
3361 case R_386_TLS_LE_32
:
3363 if (!bfd_link_executable (info
))
3365 Elf_Internal_Rela outrel
;
3368 outrel
.r_offset
= rel
->r_offset
3369 + input_section
->output_section
->vma
3370 + input_section
->output_offset
;
3371 if (h
!= NULL
&& h
->dynindx
!= -1)
3375 if (r_type
== R_386_TLS_LE_32
)
3376 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3378 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3379 sreloc
= elf_section_data (input_section
)->sreloc
;
3382 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3385 else if (r_type
== R_386_TLS_LE_32
)
3386 relocation
= _bfd_x86_elf_dtpoff_base (info
) - relocation
;
3388 relocation
-= _bfd_x86_elf_dtpoff_base (info
);
3390 else if (r_type
== R_386_TLS_LE_32
)
3391 relocation
= elf_i386_tpoff (info
, relocation
);
3393 relocation
= -elf_i386_tpoff (info
, relocation
);
3400 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3401 because such sections are not SEC_ALLOC and thus ld.so will
3402 not process them. */
3403 if (unresolved_reloc
3404 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3406 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3407 rel
->r_offset
) != (bfd_vma
) -1)
3410 /* xgettext:c-format */
3411 (_("%pB(%pA+%#" PRIx64
"): unresolvable %s relocation against symbol `%s'"),
3414 (uint64_t) rel
->r_offset
,
3416 h
->root
.root
.string
);
3421 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3422 contents
, rel
->r_offset
,
3425 check_relocation_error
:
3426 if (r
!= bfd_reloc_ok
)
3431 name
= h
->root
.root
.string
;
3434 name
= bfd_elf_string_from_elf_section (input_bfd
,
3435 symtab_hdr
->sh_link
,
3440 name
= bfd_section_name (sec
);
3443 if (r
== bfd_reloc_overflow
)
3444 (*info
->callbacks
->reloc_overflow
)
3445 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3446 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3450 /* xgettext:c-format */
3451 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3452 input_bfd
, input_section
,
3453 (uint64_t) rel
->r_offset
, name
, (int) r
);
3464 Elf_Internal_Shdr
*rel_hdr
;
3465 size_t deleted
= rel
- wrel
;
3467 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
3468 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3469 if (rel_hdr
->sh_size
== 0)
3471 /* It is too late to remove an empty reloc section. Leave
3473 ??? What is wrong with an empty section??? */
3474 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
3477 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
3478 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
3479 input_section
->reloc_count
-= deleted
;
3485 /* Finish up dynamic symbol handling. We set the contents of various
3486 dynamic sections here. */
3489 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3490 struct bfd_link_info
*info
,
3491 struct elf_link_hash_entry
*h
,
3492 Elf_Internal_Sym
*sym
)
3494 struct elf_x86_link_hash_table
*htab
;
3495 unsigned plt_entry_size
;
3496 struct elf_x86_link_hash_entry
*eh
;
3497 bool local_undefweak
;
3498 bool use_plt_second
;
3500 htab
= elf_x86_hash_table (info
, I386_ELF_DATA
);
3504 plt_entry_size
= htab
->plt
.plt_entry_size
;
3506 /* Use the second PLT section only if there is .plt section. */
3507 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
3509 eh
= (struct elf_x86_link_hash_entry
*) h
;
3510 if (eh
->no_finish_dynamic_symbol
)
3513 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
3514 resolved undefined weak symbols in executable so that their
3515 references have value 0 at run-time. */
3516 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
3518 if (h
->plt
.offset
!= (bfd_vma
) -1)
3520 bfd_vma plt_index
, plt_offset
;
3522 Elf_Internal_Rela rel
;
3524 asection
*plt
, *resolved_plt
, *gotplt
, *relplt
;
3526 /* When building a static executable, use .iplt, .igot.plt and
3527 .rel.iplt sections for STT_GNU_IFUNC symbols. */
3528 if (htab
->elf
.splt
!= NULL
)
3530 plt
= htab
->elf
.splt
;
3531 gotplt
= htab
->elf
.sgotplt
;
3532 relplt
= htab
->elf
.srelplt
;
3536 plt
= htab
->elf
.iplt
;
3537 gotplt
= htab
->elf
.igotplt
;
3538 relplt
= htab
->elf
.irelplt
;
3541 VERIFY_PLT_ENTRY (info
, h
, plt
, gotplt
, relplt
, local_undefweak
)
3543 /* Get the index in the procedure linkage table which
3544 corresponds to this symbol. This is the index of this symbol
3545 in all the symbols for which we are making plt entries. The
3546 first entry in the procedure linkage table is reserved.
3548 Get the offset into the .got table of the entry that
3549 corresponds to this function. Each .got entry is 4 bytes.
3550 The first three are reserved.
3552 For static executables, we don't reserve anything. */
3554 if (plt
== htab
->elf
.splt
)
3556 got_offset
= (h
->plt
.offset
/ plt_entry_size
3557 - htab
->plt
.has_plt0
);
3558 got_offset
= (got_offset
+ 3) * 4;
3562 got_offset
= h
->plt
.offset
/ plt_entry_size
;
3563 got_offset
= got_offset
* 4;
3566 /* Fill in the entry in the procedure linkage table and update
3568 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
3573 const bfd_byte
*plt_entry
;
3574 if (bfd_link_pic (info
))
3575 plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
3577 plt_entry
= htab
->non_lazy_plt
->plt_entry
;
3578 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
3579 plt_entry
, htab
->non_lazy_plt
->plt_entry_size
);
3581 resolved_plt
= htab
->plt_second
;
3582 plt_offset
= eh
->plt_second
.offset
;
3587 plt_offset
= h
->plt
.offset
;
3590 if (! bfd_link_pic (info
))
3592 bfd_put_32 (output_bfd
,
3593 (gotplt
->output_section
->vma
3594 + gotplt
->output_offset
3596 resolved_plt
->contents
+ plt_offset
3597 + htab
->plt
.plt_got_offset
);
3599 if (htab
->elf
.target_os
== is_vxworks
)
3601 int s
, k
, reloc_index
;
3603 /* Create the R_386_32 relocation referencing the GOT
3604 for this PLT entry. */
3606 /* S: Current slot number (zero-based). */
3607 s
= ((h
->plt
.offset
- htab
->plt
.plt_entry_size
)
3608 / htab
->plt
.plt_entry_size
);
3609 /* K: Number of relocations for PLTResolve. */
3610 if (bfd_link_pic (info
))
3611 k
= PLTRESOLVE_RELOCS_SHLIB
;
3613 k
= PLTRESOLVE_RELOCS
;
3614 /* Skip the PLTresolve relocations, and the relocations for
3615 the other PLT slots. */
3616 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3617 loc
= (htab
->srelplt2
->contents
+ reloc_index
3618 * sizeof (Elf32_External_Rel
));
3620 rel
.r_offset
= (plt
->output_section
->vma
3621 + plt
->output_offset
3622 + h
->plt
.offset
+ 2),
3623 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3624 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3626 /* Create the R_386_32 relocation referencing the beginning of
3627 the PLT for this GOT entry. */
3628 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3629 + htab
->elf
.sgotplt
->output_offset
3631 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3632 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3633 loc
+ sizeof (Elf32_External_Rel
));
3638 bfd_put_32 (output_bfd
, got_offset
,
3639 resolved_plt
->contents
+ plt_offset
3640 + htab
->plt
.plt_got_offset
);
3643 /* Fill in the entry in the global offset table. Leave the entry
3644 as zero for undefined weak symbol in PIE. No PLT relocation
3645 against undefined weak symbol in PIE. */
3646 if (!local_undefweak
)
3648 if (htab
->plt
.has_plt0
)
3649 bfd_put_32 (output_bfd
,
3650 (plt
->output_section
->vma
3651 + plt
->output_offset
3653 + htab
->lazy_plt
->plt_lazy_offset
),
3654 gotplt
->contents
+ got_offset
);
3656 /* Fill in the entry in the .rel.plt section. */
3657 rel
.r_offset
= (gotplt
->output_section
->vma
3658 + gotplt
->output_offset
3660 if (PLT_LOCAL_IFUNC_P (info
, h
))
3662 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
3663 h
->root
.root
.string
,
3664 h
->root
.u
.def
.section
->owner
);
3666 /* If an STT_GNU_IFUNC symbol is locally defined, generate
3667 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
3668 in the .got.plt section. */
3669 bfd_put_32 (output_bfd
,
3670 (h
->root
.u
.def
.value
3671 + h
->root
.u
.def
.section
->output_section
->vma
3672 + h
->root
.u
.def
.section
->output_offset
),
3673 gotplt
->contents
+ got_offset
);
3674 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3676 if (htab
->params
->report_relative_reloc
)
3677 _bfd_x86_elf_link_report_relative_reloc
3678 (info
, relplt
, h
, sym
, "R_386_IRELATIVE", &rel
);
3680 /* R_386_IRELATIVE comes last. */
3681 plt_index
= htab
->next_irelative_index
--;
3685 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3686 plt_index
= htab
->next_jump_slot_index
++;
3689 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3690 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3692 /* Don't fill the second and third slots in PLT entry for
3693 static executables nor without PLT0. */
3694 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
3696 bfd_put_32 (output_bfd
,
3697 plt_index
* sizeof (Elf32_External_Rel
),
3698 plt
->contents
+ h
->plt
.offset
3699 + htab
->lazy_plt
->plt_reloc_offset
);
3700 bfd_put_32 (output_bfd
,
3702 + htab
->lazy_plt
->plt_plt_offset
+ 4),
3703 (plt
->contents
+ h
->plt
.offset
3704 + htab
->lazy_plt
->plt_plt_offset
));
3708 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
3710 bfd_vma got_offset
, plt_offset
;
3711 asection
*plt
, *got
, *gotplt
;
3712 const bfd_byte
*got_plt_entry
;
3714 /* Set the entry in the GOT procedure linkage table. */
3715 plt
= htab
->plt_got
;
3716 got
= htab
->elf
.sgot
;
3717 gotplt
= htab
->elf
.sgotplt
;
3718 got_offset
= h
->got
.offset
;
3720 if (got_offset
== (bfd_vma
) -1
3726 /* Fill in the entry in the GOT procedure linkage table. */
3727 if (! bfd_link_pic (info
))
3729 got_plt_entry
= htab
->non_lazy_plt
->plt_entry
;
3730 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
3734 got_plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
3735 got_offset
+= (got
->output_section
->vma
3736 + got
->output_offset
3737 - gotplt
->output_section
->vma
3738 - gotplt
->output_offset
);
3741 plt_offset
= eh
->plt_got
.offset
;
3742 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
3743 htab
->non_lazy_plt
->plt_entry_size
);
3744 bfd_put_32 (output_bfd
, got_offset
,
3745 (plt
->contents
+ plt_offset
3746 + htab
->non_lazy_plt
->plt_got_offset
));
3749 if (!local_undefweak
3751 && (h
->plt
.offset
!= (bfd_vma
) -1
3752 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
3754 /* Mark the symbol as undefined, rather than as defined in
3755 the .plt section. Leave the value if there were any
3756 relocations where pointer equality matters (this is a clue
3757 for the dynamic linker, to make function pointer
3758 comparisons work between an application and shared
3759 library), otherwise set it to zero. If a function is only
3760 called from a binary, there is no need to slow down
3761 shared libraries because of that. */
3762 sym
->st_shndx
= SHN_UNDEF
;
3763 if (!h
->pointer_equality_needed
)
3767 _bfd_x86_elf_link_fixup_ifunc_symbol (info
, htab
, h
, sym
);
3769 /* Don't generate dynamic GOT relocation against undefined weak
3770 symbol in executable. */
3771 if (h
->got
.offset
!= (bfd_vma
) -1
3772 && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h
)->tls_type
)
3773 && (elf_x86_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
3774 && !local_undefweak
)
3776 Elf_Internal_Rela rel
;
3777 asection
*relgot
= htab
->elf
.srelgot
;
3778 const char *relative_reloc_name
= NULL
;
3780 /* This symbol has an entry in the global offset table. Set it
3783 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3786 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3787 + htab
->elf
.sgot
->output_offset
3788 + (h
->got
.offset
& ~(bfd_vma
) 1));
3790 /* If this is a static link, or it is a -Bsymbolic link and the
3791 symbol is defined locally or was forced to be local because
3792 of a version file, we just want to emit a RELATIVE reloc.
3793 The entry in the global offset table will already have been
3794 initialized in the relocate_section function. */
3796 && h
->type
== STT_GNU_IFUNC
)
3798 if (h
->plt
.offset
== (bfd_vma
) -1)
3800 /* STT_GNU_IFUNC is referenced without PLT. */
3801 if (htab
->elf
.splt
== NULL
)
3803 /* use .rel[a].iplt section to store .got relocations
3804 in static executable. */
3805 relgot
= htab
->elf
.irelplt
;
3807 if (SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3809 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %pB\n"),
3810 h
->root
.root
.string
,
3811 h
->root
.u
.def
.section
->owner
);
3813 bfd_put_32 (output_bfd
,
3814 (h
->root
.u
.def
.value
3815 + h
->root
.u
.def
.section
->output_section
->vma
3816 + h
->root
.u
.def
.section
->output_offset
),
3817 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3818 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3819 relative_reloc_name
= "R_386_IRELATIVE";
3824 else if (bfd_link_pic (info
))
3826 /* Generate R_386_GLOB_DAT. */
3834 if (!h
->pointer_equality_needed
)
3837 /* For non-shared object, we can't use .got.plt, which
3838 contains the real function addres if we need pointer
3839 equality. We load the GOT entry with the PLT entry. */
3840 if (htab
->plt_second
!= NULL
)
3842 plt
= htab
->plt_second
;
3843 plt_offset
= eh
->plt_second
.offset
;
3847 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
3848 plt_offset
= h
->plt
.offset
;
3850 bfd_put_32 (output_bfd
,
3851 (plt
->output_section
->vma
3852 + plt
->output_offset
+ plt_offset
),
3853 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3857 else if (bfd_link_pic (info
)
3858 && SYMBOL_REFERENCES_LOCAL_P (info
, h
))
3860 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3861 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3862 relative_reloc_name
= "R_386_RELATIVE";
3866 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3868 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3869 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3870 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3873 if (relative_reloc_name
!= NULL
3874 && htab
->params
->report_relative_reloc
)
3875 _bfd_x86_elf_link_report_relative_reloc
3876 (info
, relgot
, h
, sym
, relative_reloc_name
, &rel
);
3878 elf_append_rel (output_bfd
, relgot
, &rel
);
3883 Elf_Internal_Rela rel
;
3886 /* This symbol needs a copy reloc. Set it up. */
3887 VERIFY_COPY_RELOC (h
, htab
)
3889 rel
.r_offset
= (h
->root
.u
.def
.value
3890 + h
->root
.u
.def
.section
->output_section
->vma
3891 + h
->root
.u
.def
.section
->output_offset
);
3892 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3893 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3894 s
= htab
->elf
.sreldynrelro
;
3896 s
= htab
->elf
.srelbss
;
3897 elf_append_rel (output_bfd
, s
, &rel
);
3903 /* Finish up local dynamic symbol handling. We set the contents of
3904 various dynamic sections here. */
3907 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
3909 struct elf_link_hash_entry
*h
3910 = (struct elf_link_hash_entry
*) *slot
;
3911 struct bfd_link_info
*info
3912 = (struct bfd_link_info
*) inf
;
3914 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
3918 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
3919 here since undefined weak symbol may not be dynamic and may not be
3920 called for elf_i386_finish_dynamic_symbol. */
3923 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
3926 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
3927 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3929 if (h
->root
.type
!= bfd_link_hash_undefweak
3930 || h
->dynindx
!= -1)
3933 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
3937 /* Used to decide how to sort relocs in an optimal manner for the
3938 dynamic linker, before writing them out. */
3940 static enum elf_reloc_type_class
3941 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
3942 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3943 const Elf_Internal_Rela
*rela
)
3945 bfd
*abfd
= info
->output_bfd
;
3946 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3947 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3949 if (htab
->dynsym
!= NULL
3950 && htab
->dynsym
->contents
!= NULL
)
3952 /* Check relocation against STT_GNU_IFUNC symbol if there are
3954 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
3955 if (r_symndx
!= STN_UNDEF
)
3957 Elf_Internal_Sym sym
;
3958 if (!bed
->s
->swap_symbol_in (abfd
,
3959 (htab
->dynsym
->contents
3960 + r_symndx
* sizeof (Elf32_External_Sym
)),
3964 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3965 return reloc_class_ifunc
;
3969 switch (ELF32_R_TYPE (rela
->r_info
))
3971 case R_386_IRELATIVE
:
3972 return reloc_class_ifunc
;
3973 case R_386_RELATIVE
:
3974 return reloc_class_relative
;
3975 case R_386_JUMP_SLOT
:
3976 return reloc_class_plt
;
3978 return reloc_class_copy
;
3980 return reloc_class_normal
;
3984 /* Finish up the dynamic sections. */
3987 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3988 struct bfd_link_info
*info
)
3990 struct elf_x86_link_hash_table
*htab
;
3992 htab
= _bfd_x86_elf_finish_dynamic_sections (output_bfd
, info
);
3996 if (!htab
->elf
.dynamic_sections_created
)
3999 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4001 if (bfd_is_abs_section (htab
->elf
.splt
->output_section
))
4003 info
->callbacks
->einfo
4004 (_("%F%P: discarded output section: `%pA'\n"),
4009 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4010 really seem like the right value. */
4011 elf_section_data (htab
->elf
.splt
->output_section
)
4012 ->this_hdr
.sh_entsize
= 4;
4014 if (htab
->plt
.has_plt0
)
4016 /* Fill in the special first entry in the procedure linkage
4018 memcpy (htab
->elf
.splt
->contents
, htab
->plt
.plt0_entry
,
4019 htab
->lazy_plt
->plt0_entry_size
);
4020 memset (htab
->elf
.splt
->contents
+ htab
->lazy_plt
->plt0_entry_size
,
4021 htab
->plt0_pad_byte
,
4022 htab
->plt
.plt_entry_size
- htab
->lazy_plt
->plt0_entry_size
);
4023 if (!bfd_link_pic (info
))
4025 bfd_put_32 (output_bfd
,
4026 (htab
->elf
.sgotplt
->output_section
->vma
4027 + htab
->elf
.sgotplt
->output_offset
4029 htab
->elf
.splt
->contents
4030 + htab
->lazy_plt
->plt0_got1_offset
);
4031 bfd_put_32 (output_bfd
,
4032 (htab
->elf
.sgotplt
->output_section
->vma
4033 + htab
->elf
.sgotplt
->output_offset
4035 htab
->elf
.splt
->contents
4036 + htab
->lazy_plt
->plt0_got2_offset
);
4038 if (htab
->elf
.target_os
== is_vxworks
)
4040 Elf_Internal_Rela rel
;
4041 int num_plts
= (htab
->elf
.splt
->size
4042 / htab
->plt
.plt_entry_size
) - 1;
4044 asection
*srelplt2
= htab
->srelplt2
;
4046 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4047 + 4. On IA32 we use REL relocations so the
4048 addend goes in the PLT directly. */
4049 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4050 + htab
->elf
.splt
->output_offset
4051 + htab
->lazy_plt
->plt0_got1_offset
);
4052 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4054 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4055 srelplt2
->contents
);
4056 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
4058 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4059 + htab
->elf
.splt
->output_offset
4060 + htab
->lazy_plt
->plt0_got2_offset
);
4061 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4063 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4064 srelplt2
->contents
+
4065 sizeof (Elf32_External_Rel
));
4066 /* Correct the .rel.plt.unloaded relocations. */
4067 p
= srelplt2
->contents
;
4068 if (bfd_link_pic (info
))
4069 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4071 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4073 for (; num_plts
; num_plts
--)
4075 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4076 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
4078 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4079 p
+= sizeof (Elf32_External_Rel
);
4081 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4082 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
4084 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4085 p
+= sizeof (Elf32_External_Rel
);
4092 /* Fill PLT entries for undefined weak symbols in PIE. */
4093 if (bfd_link_pie (info
))
4094 bfd_hash_traverse (&info
->hash
->table
,
4095 elf_i386_pie_finish_undefweak_symbol
,
4101 /* Fill PLT/GOT entries and allocate dynamic relocations for local
4102 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
4103 It has to be done before elf_link_sort_relocs is called so that
4104 dynamic relocations are properly sorted. */
4107 elf_i386_output_arch_local_syms
4108 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
4109 struct bfd_link_info
*info
,
4110 void *flaginfo ATTRIBUTE_UNUSED
,
4111 int (*func
) (void *, const char *,
4114 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
4116 struct elf_x86_link_hash_table
*htab
4117 = elf_x86_hash_table (info
, I386_ELF_DATA
);
4121 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4122 htab_traverse (htab
->loc_hash_table
,
4123 elf_i386_finish_local_dynamic_symbol
,
4129 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
4130 dynamic relocations. */
4133 elf_i386_get_synthetic_symtab (bfd
*abfd
,
4134 long symcount ATTRIBUTE_UNUSED
,
4135 asymbol
**syms ATTRIBUTE_UNUSED
,
4142 bfd_byte
*plt_contents
;
4144 const struct elf_x86_lazy_plt_layout
*lazy_plt
;
4145 const struct elf_x86_non_lazy_plt_layout
*non_lazy_plt
;
4146 const struct elf_x86_lazy_plt_layout
*lazy_ibt_plt
;
4147 const struct elf_x86_non_lazy_plt_layout
*non_lazy_ibt_plt
;
4150 enum elf_x86_plt_type plt_type
;
4151 struct elf_x86_plt plts
[] =
4153 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0, 0 },
4154 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 },
4155 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0, 0 },
4156 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0, 0 }
4161 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
4164 if (dynsymcount
<= 0)
4167 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
4171 non_lazy_plt
= NULL
;
4172 /* Silence GCC 6. */
4174 non_lazy_ibt_plt
= NULL
;
4175 lazy_ibt_plt
= NULL
;
4176 switch (get_elf_backend_data (abfd
)->target_os
)
4180 non_lazy_plt
= &elf_i386_non_lazy_plt
;
4181 lazy_ibt_plt
= &elf_i386_lazy_ibt_plt
;
4182 non_lazy_ibt_plt
= &elf_i386_non_lazy_ibt_plt
;
4185 lazy_plt
= &elf_i386_lazy_plt
;
4194 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
4196 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
4197 if (plt
== NULL
|| plt
->size
== 0)
4200 /* Get the PLT section contents. */
4201 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
4202 if (plt_contents
== NULL
)
4204 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
4205 plt_contents
, 0, plt
->size
))
4207 free (plt_contents
);
4211 /* Check what kind of PLT it is. */
4212 plt_type
= plt_unknown
;
4213 if (plts
[j
].type
== plt_unknown
4214 && (plt
->size
>= (lazy_plt
->plt0_entry_size
4215 + lazy_plt
->plt_entry_size
)))
4217 /* Match lazy PLT first. */
4218 if (memcmp (plt_contents
, lazy_plt
->plt0_entry
,
4219 lazy_plt
->plt0_got1_offset
) == 0)
4221 /* The fist entry in the lazy IBT PLT is the same as the
4223 if (lazy_ibt_plt
!= NULL
4224 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt0_entry_size
,
4225 lazy_ibt_plt
->plt_entry
,
4226 lazy_ibt_plt
->plt_got_offset
) == 0))
4227 plt_type
= plt_lazy
| plt_second
;
4229 plt_type
= plt_lazy
;
4231 else if (memcmp (plt_contents
, lazy_plt
->pic_plt0_entry
,
4232 lazy_plt
->plt0_got1_offset
) == 0)
4234 /* The fist entry in the PIC lazy IBT PLT is the same as
4235 the normal PIC lazy PLT. */
4236 if (lazy_ibt_plt
!= NULL
4237 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt0_entry_size
,
4238 lazy_ibt_plt
->pic_plt_entry
,
4239 lazy_ibt_plt
->plt_got_offset
) == 0))
4240 plt_type
= plt_lazy
| plt_pic
| plt_second
;
4242 plt_type
= plt_lazy
| plt_pic
;
4246 if (non_lazy_plt
!= NULL
4247 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
)
4248 && plt
->size
>= non_lazy_plt
->plt_entry_size
)
4250 /* Match non-lazy PLT. */
4251 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
4252 non_lazy_plt
->plt_got_offset
) == 0)
4253 plt_type
= plt_non_lazy
;
4254 else if (memcmp (plt_contents
, non_lazy_plt
->pic_plt_entry
,
4255 non_lazy_plt
->plt_got_offset
) == 0)
4259 if ((non_lazy_ibt_plt
!= NULL
)
4260 && (plt_type
== plt_unknown
|| plt_type
== plt_second
)
4261 && plt
->size
>= non_lazy_ibt_plt
->plt_entry_size
)
4263 if (memcmp (plt_contents
,
4264 non_lazy_ibt_plt
->plt_entry
,
4265 non_lazy_ibt_plt
->plt_got_offset
) == 0)
4267 /* Match IBT PLT. */
4268 plt_type
= plt_second
;
4269 non_lazy_plt
= non_lazy_ibt_plt
;
4271 else if (memcmp (plt_contents
,
4272 non_lazy_ibt_plt
->pic_plt_entry
,
4273 non_lazy_ibt_plt
->plt_got_offset
) == 0)
4275 /* Match PIC IBT PLT. */
4276 plt_type
= plt_second
| plt_pic
;
4277 non_lazy_plt
= non_lazy_ibt_plt
;
4281 if (plt_type
== plt_unknown
)
4283 free (plt_contents
);
4288 plts
[j
].type
= plt_type
;
4290 if ((plt_type
& plt_lazy
))
4292 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
4293 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
4294 /* Skip PLT0 in lazy PLT. */
4299 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
4300 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
4304 /* Skip lazy PLT when the second PLT is used. */
4305 if ((plt_type
& (plt_lazy
| plt_second
))
4306 == (plt_lazy
| plt_second
))
4310 n
= plt
->size
/ plts
[j
].plt_entry_size
;
4315 plts
[j
].contents
= plt_contents
;
4317 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
4318 if ((plt_type
& plt_pic
))
4319 got_addr
= (bfd_vma
) -1;
4322 return _bfd_x86_elf_get_synthetic_symtab (abfd
, count
, relsize
,
4323 got_addr
, plts
, dynsyms
,
4327 /* Set up i386 GNU properties. Return the first relocatable ELF input
4328 with GNU properties if found. Otherwise, return NULL. */
4331 elf_i386_link_setup_gnu_properties (struct bfd_link_info
*info
)
4333 struct elf_x86_init_table init_table
;
4335 switch (get_elf_backend_data (info
->output_bfd
)->target_os
)
4339 init_table
.plt0_pad_byte
= 0x0;
4340 init_table
.lazy_plt
= &elf_i386_lazy_plt
;
4341 init_table
.non_lazy_plt
= &elf_i386_non_lazy_plt
;
4342 init_table
.lazy_ibt_plt
= &elf_i386_lazy_ibt_plt
;
4343 init_table
.non_lazy_ibt_plt
= &elf_i386_non_lazy_ibt_plt
;
4346 init_table
.plt0_pad_byte
= 0x90;
4347 init_table
.lazy_plt
= &elf_i386_lazy_plt
;
4348 init_table
.non_lazy_plt
= NULL
;
4349 init_table
.lazy_ibt_plt
= NULL
;
4350 init_table
.non_lazy_ibt_plt
= NULL
;
4356 init_table
.r_info
= elf32_r_info
;
4357 init_table
.r_sym
= elf32_r_sym
;
4359 return _bfd_x86_elf_link_setup_gnu_properties (info
, &init_table
);
4362 #define TARGET_LITTLE_SYM i386_elf32_vec
4363 #define TARGET_LITTLE_NAME "elf32-i386"
4364 #define ELF_ARCH bfd_arch_i386
4365 #define ELF_TARGET_ID I386_ELF_DATA
4366 #define ELF_MACHINE_CODE EM_386
4367 #define ELF_MAXPAGESIZE 0x1000
4369 #define elf_backend_can_gc_sections 1
4370 #define elf_backend_can_refcount 1
4371 #define elf_backend_want_got_plt 1
4372 #define elf_backend_plt_readonly 1
4373 #define elf_backend_want_plt_sym 0
4374 #define elf_backend_got_header_size 12
4375 #define elf_backend_plt_alignment 4
4376 #define elf_backend_dtrel_excludes_plt 1
4377 #define elf_backend_extern_protected_data 1
4378 #define elf_backend_caches_rawsize 1
4379 #define elf_backend_want_dynrelro 1
4381 /* Support RELA for objdump of prelink objects. */
4382 #define elf_info_to_howto elf_i386_info_to_howto_rel
4383 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4385 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4386 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4387 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4388 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
4390 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4391 #define elf_backend_always_size_sections elf_i386_always_size_sections
4392 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4393 #define elf_backend_fake_sections elf_i386_fake_sections
4394 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4395 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4396 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
4397 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4398 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4399 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4400 #define elf_backend_relocate_section elf_i386_relocate_section
4401 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
4402 #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol
4404 #define elf_backend_linux_prpsinfo32_ugid16 true
4406 #define elf32_bed elf32_i386_bed
4408 #include "elf32-target.h"
4410 /* FreeBSD support. */
4412 #undef TARGET_LITTLE_SYM
4413 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
4414 #undef TARGET_LITTLE_NAME
4415 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4417 #define ELF_OSABI ELFOSABI_FREEBSD
4419 /* The kernel recognizes executables as valid only if they carry a
4420 "FreeBSD" label in the ELF header. So we put this label on all
4421 executables and (for simplicity) also all other object files. */
4424 elf_i386_fbsd_init_file_header (bfd
*abfd
, struct bfd_link_info
*info
)
4426 if (!_bfd_elf_init_file_header (abfd
, info
))
4429 #ifdef OLD_FREEBSD_ABI_LABEL
4431 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4432 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
4433 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4439 #undef elf_backend_init_file_header
4440 #define elf_backend_init_file_header elf_i386_fbsd_init_file_header
4442 #define elf32_bed elf32_i386_fbsd_bed
4444 #undef elf_backend_add_symbol_hook
4446 #include "elf32-target.h"
4448 #undef elf_backend_init_file_header
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_TARGET_OS
4458 #define ELF_TARGET_OS is_solaris
4460 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4461 objects won't be recognized. */
4465 #define elf32_bed elf32_i386_sol2_bed
4467 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4469 #undef elf_backend_static_tls_alignment
4470 #define elf_backend_static_tls_alignment 8
4472 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4474 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4476 #undef elf_backend_want_plt_sym
4477 #define elf_backend_want_plt_sym 1
4479 #undef elf_backend_strtab_flags
4480 #define elf_backend_strtab_flags SHF_STRINGS
4482 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
4483 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
4484 FALSE otherwise. ISECTION is the best guess matching section from the
4485 input bfd IBFD, but it might be NULL. */
4488 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
4489 bfd
*obfd ATTRIBUTE_UNUSED
,
4490 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
4491 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
4493 /* PR 19938: FIXME: Need to add code for setting the sh_info
4494 and sh_link fields of Solaris specific section types. */
4497 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
4498 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
4500 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
4502 The following values should be set:
4505 -----------------------------------------------------------------------------
4506 SHT_SUNW_ancillary The section header index of 0
4507 [0x6fffffee] the associated string table.
4509 SHT_SUNW_capinfo The section header index of For a dynamic object, the
4510 [0x6ffffff0] the associated symbol table. section header index of
4512 SHT_SUNW_capchain table,
4515 SHT_SUNW_symsort The section header index of 0
4516 [0x6ffffff1] the associated symbol table.
4518 SHT_SUNW_tlssort The section header index of 0
4519 [0x6ffffff2] the associated symbol table.
4521 SHT_SUNW_LDYNSYM The section header index of One greater than the
4522 [0x6ffffff3] the associated string table. symbol table index of the
4523 This index is the same string last local symbol,
4524 table used by the SHT_DYNSYM STB_LOCAL. Since
4525 section. SHT_SUNW_LDYNSYM only
4526 contains local symbols,
4527 sh_info is equivalent to
4528 the number of symbols in
4531 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
4532 [0x6ffffff5] the section header index of to named strings, the
4533 the associated section header index of
4534 SHT_SUNW_capinfo table, the associated string
4535 otherwise 0. table, otherwise 0.
4537 SHT_SUNW_move The section header index of 0
4538 [0x6ffffffa] the associated symbol table.
4543 SHT_SUNW_syminfo The section header index of The section header index
4544 [0x6ffffffc] the associated symbol table. of the associated
4547 SHT_SUNW_verdef The section header index of The number of version
4548 [0x6ffffffd] the associated string table. definitions within the
4551 SHT_SUNW_verneed The section header index of The number of version
4552 [0x6ffffffe] the associated string table. dependencies within the
4555 SHT_SUNW_versym The section header index of 0
4556 [0x6fffffff] the associated symbol table. */
4559 #undef elf_backend_copy_special_section_fields
4560 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
4562 #include "elf32-target.h"
4564 /* Intel MCU support. */
4567 elf32_iamcu_elf_object_p (bfd
*abfd
)
4569 /* Set the right machine number for an IAMCU elf32 file. */
4570 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
4574 #undef TARGET_LITTLE_SYM
4575 #define TARGET_LITTLE_SYM iamcu_elf32_vec
4576 #undef TARGET_LITTLE_NAME
4577 #define TARGET_LITTLE_NAME "elf32-iamcu"
4579 #define ELF_ARCH bfd_arch_iamcu
4581 #undef ELF_MACHINE_CODE
4582 #define ELF_MACHINE_CODE EM_IAMCU
4584 #undef ELF_TARGET_OS
4588 #define elf32_bed elf32_iamcu_bed
4590 #undef elf_backend_object_p
4591 #define elf_backend_object_p elf32_iamcu_elf_object_p
4593 #undef elf_backend_static_tls_alignment
4595 #undef elf_backend_want_plt_sym
4596 #define elf_backend_want_plt_sym 0
4598 #undef elf_backend_strtab_flags
4599 #undef elf_backend_copy_special_section_fields
4601 #include "elf32-target.h"
4603 /* Restore defaults. */
4605 #define ELF_ARCH bfd_arch_i386
4606 #undef ELF_MACHINE_CODE
4607 #define ELF_MACHINE_CODE EM_386
4608 #undef elf_backend_object_p
4610 /* VxWorks support. */
4612 #undef TARGET_LITTLE_SYM
4613 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
4614 #undef TARGET_LITTLE_NAME
4615 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4617 #undef ELF_MAXPAGESIZE
4618 #define ELF_MAXPAGESIZE 0x1000
4619 #undef elf_backend_plt_alignment
4620 #define elf_backend_plt_alignment 4
4622 #undef ELF_TARGET_OS
4623 #define ELF_TARGET_OS is_vxworks
4625 #undef elf_backend_relocs_compatible
4626 #undef elf_backend_add_symbol_hook
4627 #define elf_backend_add_symbol_hook \
4628 elf_vxworks_add_symbol_hook
4629 #undef elf_backend_link_output_symbol_hook
4630 #define elf_backend_link_output_symbol_hook \
4631 elf_vxworks_link_output_symbol_hook
4632 #undef elf_backend_emit_relocs
4633 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4634 #undef elf_backend_final_write_processing
4635 #define elf_backend_final_write_processing \
4636 elf_vxworks_final_write_processing
4637 #undef elf_backend_static_tls_alignment
4639 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4641 #undef elf_backend_want_plt_sym
4642 #define elf_backend_want_plt_sym 1
4645 #define elf32_bed elf32_i386_vxworks_bed
4647 #include "elf32-target.h"