1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table
[]=
41 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
42 bfd_elf_generic_reloc
, "R_386_NONE",
43 TRUE
, 0x00000000, 0x00000000, FALSE
),
44 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
45 bfd_elf_generic_reloc
, "R_386_32",
46 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
47 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
48 bfd_elf_generic_reloc
, "R_386_PC32",
49 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
50 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
51 bfd_elf_generic_reloc
, "R_386_GOT32",
52 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
53 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
54 bfd_elf_generic_reloc
, "R_386_PLT32",
55 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
56 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
57 bfd_elf_generic_reloc
, "R_386_COPY",
58 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
59 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
61 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
62 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
64 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
65 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_386_RELATIVE",
67 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
68 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
69 bfd_elf_generic_reloc
, "R_386_GOTOFF",
70 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
71 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_386_GOTPC",
73 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
85 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
86 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_386_TLS_IE",
88 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
91 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
92 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_386_TLS_LE",
94 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
95 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_386_TLS_GD",
97 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
98 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
100 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
101 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_386_16",
103 TRUE
, 0xffff, 0xffff, FALSE
),
104 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_386_PC16",
106 TRUE
, 0xffff, 0xffff, TRUE
),
107 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_386_8",
109 TRUE
, 0xff, 0xff, FALSE
),
110 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_386_PC8",
112 TRUE
, 0xff, 0xff, TRUE
),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
119 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
120 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
122 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
123 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
125 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
126 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
128 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
129 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
131 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
132 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
133 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
134 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
135 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
136 bfd_elf_generic_reloc
, "R_386_SIZE32",
137 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
138 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
140 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
141 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
142 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
145 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
146 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
147 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
148 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
149 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
150 HOWTO(R_386_GOT32X
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
151 bfd_elf_generic_reloc
, "R_386_GOT32X",
152 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT
, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE
, /* pc_relative */
165 complain_overflow_dont
, /* complain_on_overflow */
166 NULL
, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE
, /* partial_inplace */
171 FALSE
), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY
, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE
, /* pc_relative */
180 complain_overflow_dont
, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE
, /* partial_inplace */
186 FALSE
) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type
*
200 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
201 bfd_reloc_code_real_type code
)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table
[R_386_NONE
];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table
[R_386_32
];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table
[R_386_32
];
217 case BFD_RELOC_32_PCREL
:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table
[R_386_PC32
];
221 case BFD_RELOC_386_GOT32
:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table
[R_386_GOT32
];
225 case BFD_RELOC_386_PLT32
:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table
[R_386_PLT32
];
229 case BFD_RELOC_386_COPY
:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table
[R_386_COPY
];
233 case BFD_RELOC_386_GLOB_DAT
:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table
[R_386_GLOB_DAT
];
237 case BFD_RELOC_386_JUMP_SLOT
:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table
[R_386_JUMP_SLOT
];
241 case BFD_RELOC_386_RELATIVE
:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table
[R_386_RELATIVE
];
245 case BFD_RELOC_386_GOTOFF
:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table
[R_386_GOTOFF
];
249 case BFD_RELOC_386_GOTPC
:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table
[R_386_GOTPC
];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF
:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_IE
:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_GOTIE
:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_LE
:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_GD
:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
274 case BFD_RELOC_386_TLS_LDM
:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
282 case BFD_RELOC_16_PCREL
:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
290 case BFD_RELOC_8_PCREL
:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32
:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_IE_32
:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_LE_32
:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPMOD32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_DTPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_386_TLS_TPOFF32
:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
319 case BFD_RELOC_SIZE32
:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_GOTDESC
:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC_CALL
:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
331 case BFD_RELOC_386_TLS_DESC
:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
335 case BFD_RELOC_386_IRELATIVE
:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
339 case BFD_RELOC_386_GOT32X
:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table
[R_386_GOT32X
- R_386_tls_offset
];
343 case BFD_RELOC_VTABLE_INHERIT
:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
347 case BFD_RELOC_VTABLE_ENTRY
:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
359 static reloc_howto_type
*
360 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
365 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
366 if (elf_howto_table
[i
].name
!= NULL
367 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
368 return &elf_howto_table
[i
];
373 static reloc_howto_type
*
374 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
378 if ((indx
= r_type
) >= R_386_standard
379 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
380 >= R_386_ext
- R_386_standard
)
381 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
382 >= R_386_ext2
- R_386_ext
)
383 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext2
384 >= R_386_vt
- R_386_ext2
))
386 /* xgettext:c-format */
387 _bfd_error_handler (_("%B: invalid relocation type %d"),
391 /* PR 17512: file: 0f67f69d. */
392 if (elf_howto_table
[indx
].type
!= r_type
)
394 return &elf_howto_table
[indx
];
398 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
400 Elf_Internal_Rela
*dst
)
402 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
403 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
406 /* Return whether a symbol name implies a local label. The UnixWare
407 2.1 cc generates temporary symbols that start with .X, so we
408 recognize them here. FIXME: do other SVR4 compilers also use .X?.
409 If so, we should move the .X recognition into
410 _bfd_elf_is_local_label_name. */
413 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
415 if (name
[0] == '.' && name
[1] == 'X')
418 return _bfd_elf_is_local_label_name (abfd
, name
);
421 /* Support for core dump NOTE sections. */
424 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
429 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
431 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
437 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
440 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
444 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
448 switch (note
->descsz
)
453 case 144: /* Linux/i386 */
455 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
458 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
468 /* Make a ".reg/999" section. */
469 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
470 size
, note
->descpos
+ offset
);
474 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
476 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
478 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
483 elf_tdata (abfd
)->core
->program
484 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
485 elf_tdata (abfd
)->core
->command
486 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
490 switch (note
->descsz
)
495 case 124: /* Linux/i386 elf_prpsinfo. */
496 elf_tdata (abfd
)->core
->pid
497 = bfd_get_32 (abfd
, note
->descdata
+ 12);
498 elf_tdata (abfd
)->core
->program
499 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
500 elf_tdata (abfd
)->core
->command
501 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
505 /* Note that for some reason, a spurious space is tacked
506 onto the end of the args in some (at least one anyway)
507 implementations, so strip it off if it exists. */
509 char *command
= elf_tdata (abfd
)->core
->command
;
510 int n
= strlen (command
);
512 if (0 < n
&& command
[n
- 1] == ' ')
513 command
[n
- 1] = '\0';
519 /* Functions for the i386 ELF linker.
521 In order to gain some understanding of code in this file without
522 knowing all the intricate details of the linker, note the
525 Functions named elf_i386_* are called by external routines, other
526 functions are only called locally. elf_i386_* functions appear
527 in this file more or less in the order in which they are called
528 from external routines. eg. elf_i386_check_relocs is called
529 early in the link process, elf_i386_finish_dynamic_sections is
530 one of the last functions. */
533 /* The name of the dynamic interpreter. This is put in the .interp
536 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
539 copying dynamic variables from a shared lib into an app's dynbss
540 section, and instead use a dynamic relocation to point into the
542 #define ELIMINATE_COPY_RELOCS 1
544 /* The size in bytes of an entry in the procedure linkage table. */
546 #define PLT_ENTRY_SIZE 16
548 /* The first entry in an absolute procedure linkage table looks like
549 this. See the SVR4 ABI i386 supplement to see how this works.
550 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
552 static const bfd_byte elf_i386_plt0_entry
[12] =
554 0xff, 0x35, /* pushl contents of address */
555 0, 0, 0, 0, /* replaced with address of .got + 4. */
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0 /* replaced with address of .got + 8. */
560 /* Subsequent entries in an absolute procedure linkage table look like
563 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
565 0xff, 0x25, /* jmp indirect */
566 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
567 0x68, /* pushl immediate */
568 0, 0, 0, 0, /* replaced with offset into relocation table. */
569 0xe9, /* jmp relative */
570 0, 0, 0, 0 /* replaced with offset to start of .plt. */
573 /* The first entry in a PIC procedure linkage table look like this.
574 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
576 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
578 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
579 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
582 /* Subsequent entries in a PIC procedure linkage table look like this. */
584 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
586 0xff, 0xa3, /* jmp *offset(%ebx) */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x68, /* pushl immediate */
589 0, 0, 0, 0, /* replaced with offset into relocation table. */
590 0xe9, /* jmp relative */
591 0, 0, 0, 0 /* replaced with offset to start of .plt. */
594 /* Entries in the GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_got_plt_entry
[8] =
598 0xff, 0x25, /* jmp indirect */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the PIC GOT procedure linkage table look like this. */
605 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* .eh_frame covering the .plt section. */
614 static const bfd_byte elf_i386_eh_frame_plt
[] =
616 #define PLT_CIE_LENGTH 20
617 #define PLT_FDE_LENGTH 36
618 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
619 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
620 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
621 0, 0, 0, 0, /* CIE ID */
623 'z', 'R', 0, /* Augmentation string */
624 1, /* Code alignment factor */
625 0x7c, /* Data alignment factor */
626 8, /* Return address column */
627 1, /* Augmentation size */
628 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
629 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
630 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
631 DW_CFA_nop
, DW_CFA_nop
,
633 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
634 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
635 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
636 0, 0, 0, 0, /* .plt size goes here */
637 0, /* Augmentation size */
638 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
639 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
640 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
641 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
642 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
643 11, /* Block length */
644 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
645 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
646 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
647 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
648 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
651 /* .eh_frame covering the .plt.got section. */
653 static const bfd_byte elf_i386_eh_frame_plt_got
[] =
655 #define PLT_GOT_FDE_LENGTH 16
656 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
657 0, 0, 0, 0, /* CIE ID */
659 'z', 'R', 0, /* Augmentation string */
660 1, /* Code alignment factor */
661 0x7c, /* Data alignment factor */
662 8, /* Return address column */
663 1, /* Augmentation size */
664 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
665 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
666 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
667 DW_CFA_nop
, DW_CFA_nop
,
669 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
670 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
671 0, 0, 0, 0, /* the start of .plt.got goes here */
672 0, 0, 0, 0, /* .plt.got size goes here */
673 0, /* Augmentation size */
674 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
677 struct elf_i386_plt_layout
679 /* The first entry in an absolute procedure linkage table looks like this. */
680 const bfd_byte
*plt0_entry
;
681 unsigned int plt0_entry_size
;
683 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
684 unsigned int plt0_got1_offset
;
685 unsigned int plt0_got2_offset
;
687 /* Later entries in an absolute procedure linkage table look like this. */
688 const bfd_byte
*plt_entry
;
689 unsigned int plt_entry_size
;
691 /* Offsets into plt_entry that are to be replaced with... */
692 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
693 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
694 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
696 /* Offset into plt_entry where the initial value of the GOT entry points. */
697 unsigned int plt_lazy_offset
;
699 /* The first entry in a PIC procedure linkage table looks like this. */
700 const bfd_byte
*pic_plt0_entry
;
702 /* Subsequent entries in a PIC procedure linkage table look like this. */
703 const bfd_byte
*pic_plt_entry
;
705 /* .eh_frame covering the .plt section. */
706 const bfd_byte
*eh_frame_plt
;
707 unsigned int eh_frame_plt_size
;
709 /* .eh_frame covering the .plt.got section. */
710 const bfd_byte
*eh_frame_plt_got
;
711 unsigned int eh_frame_plt_got_size
;
714 #define GET_PLT_ENTRY_SIZE(abfd) \
715 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
717 /* These are the standard parameters. */
718 static const struct elf_i386_plt_layout elf_i386_plt
=
720 elf_i386_plt0_entry
, /* plt0_entry */
721 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
722 2, /* plt0_got1_offset */
723 8, /* plt0_got2_offset */
724 elf_i386_plt_entry
, /* plt_entry */
725 PLT_ENTRY_SIZE
, /* plt_entry_size */
726 2, /* plt_got_offset */
727 7, /* plt_reloc_offset */
728 12, /* plt_plt_offset */
729 6, /* plt_lazy_offset */
730 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
731 elf_i386_pic_plt_entry
, /* pic_plt_entry */
732 elf_i386_eh_frame_plt
, /* eh_frame_plt */
733 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
734 elf_i386_eh_frame_plt_got
, /* eh_frame_plt_got */
735 sizeof (elf_i386_eh_frame_plt_got
), /* eh_frame_plt_got_size */
739 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
740 for the PLTResolve stub and then for each PLT entry. */
741 #define PLTRESOLVE_RELOCS_SHLIB 0
742 #define PLTRESOLVE_RELOCS 2
743 #define PLT_NON_JUMP_SLOT_RELOCS 2
745 /* Architecture-specific backend data for i386. */
747 struct elf_i386_backend_data
749 /* Parameters describing PLT generation. */
750 const struct elf_i386_plt_layout
*plt
;
752 /* Value used to fill the unused bytes of the first PLT entry. */
753 bfd_byte plt0_pad_byte
;
755 /* True if the target system is VxWorks. */
759 #define get_elf_i386_backend_data(abfd) \
760 ((const struct elf_i386_backend_data *) \
761 get_elf_backend_data (abfd)->arch_data)
763 /* These are the standard parameters. */
764 static const struct elf_i386_backend_data elf_i386_arch_bed
=
766 &elf_i386_plt
, /* plt */
767 0, /* plt0_pad_byte */
771 #define elf_backend_arch_data &elf_i386_arch_bed
773 /* Is a undefined weak symbol which is resolved to 0. Reference to an
774 undefined weak symbol is resolved to 0 when building executable if
776 1. Has non-GOT/non-PLT relocations in text section. Or
777 2. Has no GOT/PLT relocation.
779 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
780 ((EH)->elf.root.type == bfd_link_hash_undefweak \
781 && bfd_link_executable (INFO) \
782 && (elf_i386_hash_table (INFO)->interp == NULL \
784 || (EH)->has_non_got_reloc \
785 || !(INFO)->dynamic_undefined_weak))
787 /* i386 ELF linker hash entry. */
789 struct elf_i386_link_hash_entry
791 struct elf_link_hash_entry elf
;
793 /* Track dynamic relocs copied for this symbol. */
794 struct elf_dyn_relocs
*dyn_relocs
;
796 #define GOT_UNKNOWN 0
800 #define GOT_TLS_IE_POS 5
801 #define GOT_TLS_IE_NEG 6
802 #define GOT_TLS_IE_BOTH 7
803 #define GOT_TLS_GDESC 8
804 #define GOT_TLS_GD_BOTH_P(type) \
805 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
806 #define GOT_TLS_GD_P(type) \
807 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
808 #define GOT_TLS_GDESC_P(type) \
809 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
810 #define GOT_TLS_GD_ANY_P(type) \
811 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
812 unsigned char tls_type
;
814 /* Symbol is referenced by R_386_GOTOFF relocation. */
815 unsigned int gotoff_ref
: 1;
817 /* Symbol has GOT or PLT relocations. */
818 unsigned int has_got_reloc
: 1;
820 /* Symbol has non-GOT/non-PLT relocations in text sections. */
821 unsigned int has_non_got_reloc
: 1;
823 /* Don't call finish_dynamic_symbol on this symbol. */
824 unsigned int no_finish_dynamic_symbol
: 1;
826 /* 0: symbol isn't ___tls_get_addr.
827 1: symbol is ___tls_get_addr.
828 2: symbol is unknown. */
829 unsigned int tls_get_addr
: 2;
831 /* Reference count of C/C++ function pointer relocations in read-write
832 section which can be resolved at run-time. */
833 bfd_signed_vma func_pointer_refcount
;
835 /* Information about the GOT PLT entry. Filled when there are both
836 GOT and PLT relocations against the same function. */
837 union gotplt_union plt_got
;
839 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
840 starting at the end of the jump table. */
844 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
846 struct elf_i386_obj_tdata
848 struct elf_obj_tdata root
;
850 /* tls_type for each local got entry. */
851 char *local_got_tls_type
;
853 /* GOTPLT entries for TLS descriptors. */
854 bfd_vma
*local_tlsdesc_gotent
;
857 #define elf_i386_tdata(abfd) \
858 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
860 #define elf_i386_local_got_tls_type(abfd) \
861 (elf_i386_tdata (abfd)->local_got_tls_type)
863 #define elf_i386_local_tlsdesc_gotent(abfd) \
864 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
866 #define is_i386_elf(bfd) \
867 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
868 && elf_tdata (bfd) != NULL \
869 && elf_object_id (bfd) == I386_ELF_DATA)
872 elf_i386_mkobject (bfd
*abfd
)
874 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
878 /* i386 ELF linker hash table. */
880 struct elf_i386_link_hash_table
882 struct elf_link_hash_table elf
;
884 /* Short-cuts to get to dynamic linker sections. */
886 asection
*plt_eh_frame
;
888 asection
*plt_got_eh_frame
;
892 bfd_signed_vma refcount
;
896 /* The amount of space used by the reserved portion of the sgotplt
897 section, plus whatever space is used by the jump slots. */
898 bfd_vma sgotplt_jump_table_size
;
900 /* Small local sym cache. */
901 struct sym_cache sym_cache
;
903 /* _TLS_MODULE_BASE_ symbol. */
904 struct bfd_link_hash_entry
*tls_module_base
;
906 /* Used by local STT_GNU_IFUNC symbols. */
907 htab_t loc_hash_table
;
908 void * loc_hash_memory
;
910 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
913 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
914 bfd_vma next_tls_desc_index
;
916 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
917 bfd_vma next_jump_slot_index
;
919 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
920 bfd_vma next_irelative_index
;
922 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
923 to read-only sections. */
924 bfd_boolean readonly_dynrelocs_against_ifunc
;
927 /* Get the i386 ELF linker hash table from a link_info structure. */
929 #define elf_i386_hash_table(p) \
930 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
931 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
933 #define elf_i386_compute_jump_table_size(htab) \
934 ((htab)->elf.srelplt->reloc_count * 4)
936 /* Create an entry in an i386 ELF linker hash table. */
938 static struct bfd_hash_entry
*
939 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
940 struct bfd_hash_table
*table
,
943 /* Allocate the structure if it has not already been allocated by a
947 entry
= (struct bfd_hash_entry
*)
948 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
953 /* Call the allocation method of the superclass. */
954 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
957 struct elf_i386_link_hash_entry
*eh
;
959 eh
= (struct elf_i386_link_hash_entry
*) entry
;
960 eh
->dyn_relocs
= NULL
;
961 eh
->tls_type
= GOT_UNKNOWN
;
963 eh
->has_got_reloc
= 0;
964 eh
->has_non_got_reloc
= 0;
965 eh
->no_finish_dynamic_symbol
= 0;
966 eh
->tls_get_addr
= 2;
967 eh
->func_pointer_refcount
= 0;
968 eh
->plt_got
.offset
= (bfd_vma
) -1;
969 eh
->tlsdesc_got
= (bfd_vma
) -1;
975 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
976 for local symbol so that we can handle local STT_GNU_IFUNC symbols
977 as global symbol. We reuse indx and dynstr_index for local symbol
978 hash since they aren't used by global symbols in this backend. */
981 elf_i386_local_htab_hash (const void *ptr
)
983 struct elf_link_hash_entry
*h
984 = (struct elf_link_hash_entry
*) ptr
;
985 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
988 /* Compare local hash entries. */
991 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
993 struct elf_link_hash_entry
*h1
994 = (struct elf_link_hash_entry
*) ptr1
;
995 struct elf_link_hash_entry
*h2
996 = (struct elf_link_hash_entry
*) ptr2
;
998 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
1001 /* Find and/or create a hash entry for local symbol. */
1003 static struct elf_link_hash_entry
*
1004 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
1005 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1008 struct elf_i386_link_hash_entry e
, *ret
;
1009 asection
*sec
= abfd
->sections
;
1010 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1011 ELF32_R_SYM (rel
->r_info
));
1014 e
.elf
.indx
= sec
->id
;
1015 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1016 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1017 create
? INSERT
: NO_INSERT
);
1024 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
1028 ret
= (struct elf_i386_link_hash_entry
*)
1029 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1030 sizeof (struct elf_i386_link_hash_entry
));
1033 memset (ret
, 0, sizeof (*ret
));
1034 ret
->elf
.indx
= sec
->id
;
1035 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1036 ret
->elf
.dynindx
= -1;
1037 ret
->func_pointer_refcount
= 0;
1038 ret
->plt_got
.offset
= (bfd_vma
) -1;
1044 /* Destroy an i386 ELF linker hash table. */
1047 elf_i386_link_hash_table_free (bfd
*obfd
)
1049 struct elf_i386_link_hash_table
*htab
1050 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1052 if (htab
->loc_hash_table
)
1053 htab_delete (htab
->loc_hash_table
);
1054 if (htab
->loc_hash_memory
)
1055 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1056 _bfd_elf_link_hash_table_free (obfd
);
1059 /* Create an i386 ELF linker hash table. */
1061 static struct bfd_link_hash_table
*
1062 elf_i386_link_hash_table_create (bfd
*abfd
)
1064 struct elf_i386_link_hash_table
*ret
;
1065 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1067 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1071 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1072 elf_i386_link_hash_newfunc
,
1073 sizeof (struct elf_i386_link_hash_entry
),
1080 ret
->loc_hash_table
= htab_try_create (1024,
1081 elf_i386_local_htab_hash
,
1082 elf_i386_local_htab_eq
,
1084 ret
->loc_hash_memory
= objalloc_create ();
1085 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1087 elf_i386_link_hash_table_free (abfd
);
1090 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1092 return &ret
->elf
.root
;
1095 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1096 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1100 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1102 struct elf_i386_link_hash_table
*htab
;
1104 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1107 htab
= elf_i386_hash_table (info
);
1111 /* Set the contents of the .interp section to the interpreter. */
1112 if (bfd_link_executable (info
) && !info
->nointerp
)
1114 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
1117 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1118 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1122 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1123 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1127 if (htab
->elf
.splt
!= NULL
)
1129 if (htab
->plt_got
== NULL
1130 && !get_elf_i386_backend_data (dynobj
)->is_vxworks
1131 && get_elf_i386_backend_data (dynobj
) == &elf_i386_arch_bed
)
1133 /* Create the GOT procedure linkage table. */
1134 unsigned int plt_got_align
;
1135 const struct elf_backend_data
*bed
;
1137 bed
= get_elf_backend_data (dynobj
);
1138 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1139 && (sizeof (elf_i386_got_plt_entry
)
1140 == sizeof (elf_i386_pic_got_plt_entry
)));
1144 = bfd_make_section_anyway_with_flags (dynobj
,
1146 (bed
->dynamic_sec_flags
1151 if (htab
->plt_got
== NULL
1152 || !bfd_set_section_alignment (dynobj
,
1158 if (!info
->no_ld_generated_unwind_info
)
1160 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1161 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1162 | SEC_LINKER_CREATED
);
1164 if (htab
->plt_eh_frame
== NULL
)
1167 = bfd_make_section_anyway_with_flags (dynobj
,
1170 if (htab
->plt_eh_frame
== NULL
1171 || !bfd_set_section_alignment (dynobj
,
1177 if (htab
->plt_got_eh_frame
== NULL
1178 && htab
->plt_got
!= NULL
)
1180 htab
->plt_got_eh_frame
1181 = bfd_make_section_anyway_with_flags (dynobj
,
1184 if (htab
->plt_got_eh_frame
== NULL
1185 || !bfd_set_section_alignment (dynobj
,
1186 htab
->plt_got_eh_frame
,
1196 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1199 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1200 struct elf_link_hash_entry
*dir
,
1201 struct elf_link_hash_entry
*ind
)
1203 struct elf_i386_link_hash_entry
*edir
, *eind
;
1205 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1206 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1208 if (eind
->dyn_relocs
!= NULL
)
1210 if (edir
->dyn_relocs
!= NULL
)
1212 struct elf_dyn_relocs
**pp
;
1213 struct elf_dyn_relocs
*p
;
1215 /* Add reloc counts against the indirect sym to the direct sym
1216 list. Merge any entries against the same section. */
1217 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1219 struct elf_dyn_relocs
*q
;
1221 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1222 if (q
->sec
== p
->sec
)
1224 q
->pc_count
+= p
->pc_count
;
1225 q
->count
+= p
->count
;
1232 *pp
= edir
->dyn_relocs
;
1235 edir
->dyn_relocs
= eind
->dyn_relocs
;
1236 eind
->dyn_relocs
= NULL
;
1239 if (ind
->root
.type
== bfd_link_hash_indirect
1240 && dir
->got
.refcount
<= 0)
1242 edir
->tls_type
= eind
->tls_type
;
1243 eind
->tls_type
= GOT_UNKNOWN
;
1246 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1247 generate a R_386_COPY reloc. */
1248 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1250 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1251 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1253 if (ELIMINATE_COPY_RELOCS
1254 && ind
->root
.type
!= bfd_link_hash_indirect
1255 && dir
->dynamic_adjusted
)
1257 /* If called to transfer flags for a weakdef during processing
1258 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1259 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1260 if (dir
->versioned
!= versioned_hidden
)
1261 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1262 dir
->ref_regular
|= ind
->ref_regular
;
1263 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1264 dir
->needs_plt
|= ind
->needs_plt
;
1265 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1269 if (eind
->func_pointer_refcount
> 0)
1271 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1272 eind
->func_pointer_refcount
= 0;
1275 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1279 /* Return TRUE if the TLS access code sequence support transition
1283 elf_i386_check_tls_transition (asection
*sec
,
1285 Elf_Internal_Shdr
*symtab_hdr
,
1286 struct elf_link_hash_entry
**sym_hashes
,
1287 unsigned int r_type
,
1288 const Elf_Internal_Rela
*rel
,
1289 const Elf_Internal_Rela
*relend
)
1291 unsigned int val
, type
, reg
;
1292 unsigned long r_symndx
;
1293 struct elf_link_hash_entry
*h
;
1296 bfd_boolean indirect_call
, tls_get_addr
;
1298 offset
= rel
->r_offset
;
1303 if (offset
< 2 || (rel
+ 1) >= relend
)
1306 indirect_call
= FALSE
;
1307 call
= contents
+ offset
+ 4;
1310 if (r_type
== R_386_TLS_GD
)
1312 /* Check transition from GD access model. Only
1313 leal foo@tlsgd(,%ebx,1), %eax
1314 call ___tls_get_addr@PLT
1316 leal foo@tlsgd(%ebx) %eax
1317 call ___tls_get_addr@PLT
1320 leal foo@tlsgd(%reg), %eax
1321 call *___tls_get_addr@GOT(%reg)
1322 which may be converted to
1323 addr32 call ___tls_get_addr
1324 can transit to different access model. */
1325 if ((offset
+ 10) > sec
->size
1326 || (type
!= 0x8d && type
!= 0x04))
1331 /* leal foo@tlsgd(,%ebx,1), %eax
1332 call ___tls_get_addr@PLT */
1336 if (*(call
- 7) != 0x8d
1344 leal foo@tlsgd(%ebx), %eax
1345 call ___tls_get_addr@PLT
1348 leal foo@tlsgd(%reg), %eax
1349 call *___tls_get_addr@GOT(%reg)
1350 which may be converted to
1351 addr32 call ___tls_get_addr
1353 %eax can't be used as the GOT base register since it
1354 is used to pass parameter to ___tls_get_addr. */
1356 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1359 indirect_call
= call
[0] == 0xff;
1360 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
1361 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1363 && (call
[1] & 0xf8) == 0x90
1364 && (call
[1] & 0x7) == reg
))
1370 /* Check transition from LD access model. Only
1371 leal foo@tlsldm(%ebx), %eax
1372 call ___tls_get_addr@PLT
1374 leal foo@tlsldm(%reg), %eax
1375 call *___tls_get_addr@GOT(%reg)
1376 which may be converted to
1377 addr32 call ___tls_get_addr
1378 can transit to different access model. */
1379 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1382 /* %eax can't be used as the GOT base register since it is
1383 used to pass parameter to ___tls_get_addr. */
1385 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1388 indirect_call
= call
[0] == 0xff;
1389 if (!(reg
== 3 && call
[0] == 0xe8)
1390 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1392 && (call
[1] & 0xf8) == 0x90
1393 && (call
[1] & 0x7) == reg
))
1397 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1398 if (r_symndx
< symtab_hdr
->sh_info
)
1401 tls_get_addr
= FALSE
;
1402 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1403 if (h
!= NULL
&& h
->root
.root
.string
!= NULL
)
1405 struct elf_i386_link_hash_entry
*eh
1406 = (struct elf_i386_link_hash_entry
*) h
;
1407 tls_get_addr
= eh
->tls_get_addr
== 1;
1408 if (eh
->tls_get_addr
> 1)
1410 /* Use strncmp to check ___tls_get_addr since
1411 ___tls_get_addr may be versioned. */
1412 if (strncmp (h
->root
.root
.string
, "___tls_get_addr", 15)
1415 eh
->tls_get_addr
= 1;
1416 tls_get_addr
= TRUE
;
1419 eh
->tls_get_addr
= 0;
1425 else if (indirect_call
)
1426 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
1428 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1429 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
1432 /* Check transition from IE access model:
1433 movl foo@indntpoff(%rip), %eax
1434 movl foo@indntpoff(%rip), %reg
1435 addl foo@indntpoff(%rip), %reg
1438 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1441 /* Check "movl foo@tpoff(%rip), %eax" first. */
1442 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1449 /* Check movl|addl foo@tpoff(%rip), %reg. */
1450 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1451 return ((type
== 0x8b || type
== 0x03)
1452 && (val
& 0xc7) == 0x05);
1454 case R_386_TLS_GOTIE
:
1455 case R_386_TLS_IE_32
:
1456 /* Check transition from {IE_32,GOTIE} access model:
1457 subl foo@{tpoff,gontoff}(%reg1), %reg2
1458 movl foo@{tpoff,gontoff}(%reg1), %reg2
1459 addl foo@{tpoff,gontoff}(%reg1), %reg2
1462 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1465 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1466 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1469 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1470 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1472 case R_386_TLS_GOTDESC
:
1473 /* Check transition from GDesc access model:
1474 leal x@tlsdesc(%ebx), %eax
1476 Make sure it's a leal adding ebx to a 32-bit offset
1477 into any register, although it's probably almost always
1480 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1483 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1486 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1487 return (val
& 0xc7) == 0x83;
1489 case R_386_TLS_DESC_CALL
:
1490 /* Check transition from GDesc access model:
1491 call *x@tlsdesc(%eax)
1493 if (offset
+ 2 <= sec
->size
)
1495 /* Make sure that it's a call *x@tlsdesc(%eax). */
1496 call
= contents
+ offset
;
1497 return call
[0] == 0xff && call
[1] == 0x10;
1507 /* Return TRUE if the TLS access transition is OK or no transition
1508 will be performed. Update R_TYPE if there is a transition. */
1511 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1512 asection
*sec
, bfd_byte
*contents
,
1513 Elf_Internal_Shdr
*symtab_hdr
,
1514 struct elf_link_hash_entry
**sym_hashes
,
1515 unsigned int *r_type
, int tls_type
,
1516 const Elf_Internal_Rela
*rel
,
1517 const Elf_Internal_Rela
*relend
,
1518 struct elf_link_hash_entry
*h
,
1519 unsigned long r_symndx
,
1520 bfd_boolean from_relocate_section
)
1522 unsigned int from_type
= *r_type
;
1523 unsigned int to_type
= from_type
;
1524 bfd_boolean check
= TRUE
;
1526 /* Skip TLS transition for functions. */
1528 && (h
->type
== STT_FUNC
1529 || h
->type
== STT_GNU_IFUNC
))
1535 case R_386_TLS_GOTDESC
:
1536 case R_386_TLS_DESC_CALL
:
1537 case R_386_TLS_IE_32
:
1539 case R_386_TLS_GOTIE
:
1540 if (bfd_link_executable (info
))
1543 to_type
= R_386_TLS_LE_32
;
1544 else if (from_type
!= R_386_TLS_IE
1545 && from_type
!= R_386_TLS_GOTIE
)
1546 to_type
= R_386_TLS_IE_32
;
1549 /* When we are called from elf_i386_relocate_section, there may
1550 be additional transitions based on TLS_TYPE. */
1551 if (from_relocate_section
)
1553 unsigned int new_to_type
= to_type
;
1555 if (bfd_link_executable (info
)
1558 && (tls_type
& GOT_TLS_IE
))
1559 new_to_type
= R_386_TLS_LE_32
;
1561 if (to_type
== R_386_TLS_GD
1562 || to_type
== R_386_TLS_GOTDESC
1563 || to_type
== R_386_TLS_DESC_CALL
)
1565 if (tls_type
== GOT_TLS_IE_POS
)
1566 new_to_type
= R_386_TLS_GOTIE
;
1567 else if (tls_type
& GOT_TLS_IE
)
1568 new_to_type
= R_386_TLS_IE_32
;
1571 /* We checked the transition before when we were called from
1572 elf_i386_check_relocs. We only want to check the new
1573 transition which hasn't been checked before. */
1574 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1575 to_type
= new_to_type
;
1581 if (bfd_link_executable (info
))
1582 to_type
= R_386_TLS_LE_32
;
1589 /* Return TRUE if there is no transition. */
1590 if (from_type
== to_type
)
1593 /* Check if the transition can be performed. */
1595 && ! elf_i386_check_tls_transition (sec
, contents
,
1596 symtab_hdr
, sym_hashes
,
1597 from_type
, rel
, relend
))
1599 reloc_howto_type
*from
, *to
;
1602 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1603 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1606 name
= h
->root
.root
.string
;
1609 struct elf_i386_link_hash_table
*htab
;
1611 htab
= elf_i386_hash_table (info
);
1616 Elf_Internal_Sym
*isym
;
1618 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1620 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1625 /* xgettext:c-format */
1626 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1627 "in section `%A' failed"),
1628 abfd
, from
->name
, to
->name
, name
,
1629 (unsigned long) rel
->r_offset
, sec
);
1630 bfd_set_error (bfd_error_bad_value
);
1638 /* With the local symbol, foo, we convert
1639 mov foo@GOT[(%reg1)], %reg2
1641 lea foo[@GOTOFF(%reg1)], %reg2
1643 call/jmp *foo@GOT[(%reg)]
1645 nop call foo/jmp foo nop
1646 When PIC is false, convert
1647 test %reg1, foo@GOT[(%reg2)]
1651 binop foo@GOT[(%reg1)], %reg2
1654 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1659 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1661 Elf_Internal_Rela
*irel
,
1662 struct elf_link_hash_entry
*h
,
1663 bfd_boolean
*converted
,
1664 struct bfd_link_info
*link_info
)
1666 struct elf_i386_link_hash_table
*htab
;
1667 unsigned int opcode
;
1669 bfd_boolean baseless
;
1670 Elf_Internal_Sym
*isym
;
1671 unsigned int addend
;
1675 bfd_boolean to_reloc_32
;
1676 unsigned int r_type
;
1677 unsigned int r_symndx
;
1678 bfd_vma roff
= irel
->r_offset
;
1683 /* Addend for R_386_GOT32X relocations must be 0. */
1684 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1688 htab
= elf_i386_hash_table (link_info
);
1689 is_pic
= bfd_link_pic (link_info
);
1691 r_type
= ELF32_R_TYPE (irel
->r_info
);
1692 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1694 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1695 baseless
= (modrm
& 0xc7) == 0x5;
1697 if (baseless
&& is_pic
)
1699 /* For PIC, disallow R_386_GOT32X without a base register
1700 since we don't know what the GOT base is. */
1705 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1707 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1710 name
= h
->root
.root
.string
;
1713 /* xgettext:c-format */
1714 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1715 " register can not be used when making a shared object"),
1720 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1722 /* Convert to R_386_32 if PIC is false or there is no base
1724 to_reloc_32
= !is_pic
|| baseless
;
1726 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1730 if (opcode
== 0x0ff)
1731 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1732 goto convert_branch
;
1734 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1735 "test %reg1, foo@GOT(%reg2)" and
1736 "binop foo@GOT[(%reg1)], %reg2". */
1740 /* Undefined weak symbol is only bound locally in executable
1741 and its reference is resolved as 0. */
1742 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
, TRUE
,
1743 elf_i386_hash_entry (h
)))
1747 /* No direct branch to 0 for PIC. */
1751 goto convert_branch
;
1755 /* We can convert load of address 0 to R_386_32. */
1763 /* We have "call/jmp *foo@GOT[(%reg)]". */
1764 if ((h
->root
.type
== bfd_link_hash_defined
1765 || h
->root
.type
== bfd_link_hash_defweak
)
1766 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1768 /* The function is locally defined. */
1770 /* Convert R_386_GOT32X to R_386_PC32. */
1771 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1773 struct elf_i386_link_hash_entry
*eh
1774 = (struct elf_i386_link_hash_entry
*) h
;
1776 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1779 /* To support TLS optimization, always use addr32 prefix
1780 for "call *___tls_get_addr@GOT(%reg)". */
1781 if (eh
&& eh
->tls_get_addr
== 1)
1784 nop_offset
= irel
->r_offset
- 2;
1788 nop
= link_info
->call_nop_byte
;
1789 if (link_info
->call_nop_as_suffix
)
1791 nop_offset
= roff
+ 3;
1792 irel
->r_offset
-= 1;
1795 nop_offset
= roff
- 2;
1800 /* Convert to "jmp foo nop". */
1803 nop_offset
= roff
+ 3;
1804 irel
->r_offset
-= 1;
1807 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1808 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1809 /* When converting to PC-relative relocation, we
1810 need to adjust addend by -4. */
1811 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1812 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1819 /* We have "mov foo@GOT[(%re1g)], %reg2",
1820 "test %reg1, foo@GOT(%reg2)" and
1821 "binop foo@GOT[(%reg1)], %reg2".
1823 Avoid optimizing _DYNAMIC since ld.so may use its
1824 link-time address. */
1825 if (h
== htab
->elf
.hdynamic
)
1828 /* def_regular is set by an assignment in a linker script in
1829 bfd_elf_record_link_assignment. */
1831 || h
->root
.type
== bfd_link_hash_defined
1832 || h
->root
.type
== bfd_link_hash_defweak
)
1833 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1840 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1841 "mov $foo, %reg2" with R_386_32. */
1843 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1844 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1849 /* Convert "mov foo@GOT(%reg1), %reg2" to
1850 "lea foo@GOTOFF(%reg1), %reg2". */
1851 r_type
= R_386_GOTOFF
;
1857 /* Only R_386_32 is supported. */
1863 /* Convert "test %reg1, foo@GOT(%reg2)" to
1864 "test $foo, %reg1". */
1865 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1870 /* Convert "binop foo@GOT(%reg1), %reg2" to
1871 "binop $foo, %reg2". */
1873 | (modrm
& 0x38) >> 3
1877 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1881 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1882 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1891 /* Rename some of the generic section flags to better document how they
1893 #define need_convert_load sec_flg0
1894 #define check_relocs_failed sec_flg1
1896 /* Look through the relocs for a section during the first phase, and
1897 calculate needed space in the global offset table, procedure linkage
1898 table, and dynamic reloc sections. */
1901 elf_i386_check_relocs (bfd
*abfd
,
1902 struct bfd_link_info
*info
,
1904 const Elf_Internal_Rela
*relocs
)
1906 struct elf_i386_link_hash_table
*htab
;
1907 Elf_Internal_Shdr
*symtab_hdr
;
1908 struct elf_link_hash_entry
**sym_hashes
;
1909 const Elf_Internal_Rela
*rel
;
1910 const Elf_Internal_Rela
*rel_end
;
1914 if (bfd_link_relocatable (info
))
1917 /* Don't do anything special with non-loaded, non-alloced sections.
1918 In particular, any relocs in such sections should not affect GOT
1919 and PLT reference counting (ie. we don't allow them to create GOT
1920 or PLT entries), there's no possibility or desire to optimize TLS
1921 relocs, and there's not much point in propagating relocs to shared
1922 libs that the dynamic linker won't relocate. */
1923 if ((sec
->flags
& SEC_ALLOC
) == 0)
1926 BFD_ASSERT (is_i386_elf (abfd
));
1928 htab
= elf_i386_hash_table (info
);
1931 sec
->check_relocs_failed
= 1;
1935 /* Get the section contents. */
1936 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1937 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1938 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1940 sec
->check_relocs_failed
= 1;
1944 symtab_hdr
= &elf_symtab_hdr (abfd
);
1945 sym_hashes
= elf_sym_hashes (abfd
);
1949 rel_end
= relocs
+ sec
->reloc_count
;
1950 for (rel
= relocs
; rel
< rel_end
; rel
++)
1952 unsigned int r_type
;
1953 unsigned long r_symndx
;
1954 struct elf_link_hash_entry
*h
;
1955 struct elf_i386_link_hash_entry
*eh
;
1956 Elf_Internal_Sym
*isym
;
1958 bfd_boolean size_reloc
;
1960 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1961 r_type
= ELF32_R_TYPE (rel
->r_info
);
1963 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1965 /* xgettext:c-format */
1966 _bfd_error_handler (_("%B: bad symbol index: %d"),
1971 if (r_symndx
< symtab_hdr
->sh_info
)
1973 /* A local symbol. */
1974 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1979 /* Check relocation against local STT_GNU_IFUNC symbol. */
1980 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1982 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1986 /* Fake a STT_GNU_IFUNC symbol. */
1987 h
->type
= STT_GNU_IFUNC
;
1990 h
->forced_local
= 1;
1991 h
->root
.type
= bfd_link_hash_defined
;
1999 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2000 while (h
->root
.type
== bfd_link_hash_indirect
2001 || h
->root
.type
== bfd_link_hash_warning
)
2002 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2005 eh
= (struct elf_i386_link_hash_entry
*) h
;
2021 if (htab
->elf
.dynobj
== NULL
)
2022 htab
->elf
.dynobj
= abfd
;
2023 /* Create the ifunc sections for static executables. */
2024 if (h
->type
== STT_GNU_IFUNC
2025 && !_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
,
2031 /* It is referenced by a non-shared object. */
2033 h
->root
.non_ir_ref
= 1;
2035 if (h
->type
== STT_GNU_IFUNC
)
2036 elf_tdata (info
->output_bfd
)->has_gnu_symbols
2037 |= elf_gnu_symbol_ifunc
;
2040 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
2041 symtab_hdr
, sym_hashes
,
2042 &r_type
, GOT_UNKNOWN
,
2043 rel
, rel_end
, h
, r_symndx
, FALSE
))
2049 htab
->tls_ldm_got
.refcount
+= 1;
2053 /* This symbol requires a procedure linkage table entry. We
2054 actually build the entry in adjust_dynamic_symbol,
2055 because this might be a case of linking PIC code which is
2056 never referenced by a dynamic object, in which case we
2057 don't need to generate a procedure linkage table entry
2060 /* If this is a local symbol, we resolve it directly without
2061 creating a procedure linkage table entry. */
2065 eh
->has_got_reloc
= 1;
2067 h
->plt
.refcount
+= 1;
2074 case R_386_TLS_IE_32
:
2076 case R_386_TLS_GOTIE
:
2077 if (!bfd_link_executable (info
))
2078 info
->flags
|= DF_STATIC_TLS
;
2084 case R_386_TLS_GOTDESC
:
2085 case R_386_TLS_DESC_CALL
:
2086 /* This symbol requires a global offset table entry. */
2088 int tls_type
, old_tls_type
;
2095 tls_type
= GOT_NORMAL
;
2097 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
2098 case R_386_TLS_GOTDESC
:
2099 case R_386_TLS_DESC_CALL
:
2100 tls_type
= GOT_TLS_GDESC
; break;
2101 case R_386_TLS_IE_32
:
2102 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
2103 tls_type
= GOT_TLS_IE_NEG
;
2105 /* If this is a GD->IE transition, we may use either of
2106 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2107 tls_type
= GOT_TLS_IE
;
2110 case R_386_TLS_GOTIE
:
2111 tls_type
= GOT_TLS_IE_POS
; break;
2116 h
->got
.refcount
+= 1;
2117 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2121 bfd_signed_vma
*local_got_refcounts
;
2123 /* This is a global offset table entry for a local symbol. */
2124 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2125 if (local_got_refcounts
== NULL
)
2129 size
= symtab_hdr
->sh_info
;
2130 size
*= (sizeof (bfd_signed_vma
)
2131 + sizeof (bfd_vma
) + sizeof(char));
2132 local_got_refcounts
= (bfd_signed_vma
*)
2133 bfd_zalloc (abfd
, size
);
2134 if (local_got_refcounts
== NULL
)
2136 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2137 elf_i386_local_tlsdesc_gotent (abfd
)
2138 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2139 elf_i386_local_got_tls_type (abfd
)
2140 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2142 local_got_refcounts
[r_symndx
] += 1;
2143 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
2146 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
2147 tls_type
|= old_tls_type
;
2148 /* If a TLS symbol is accessed using IE at least once,
2149 there is no point to use dynamic model for it. */
2150 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2151 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2152 || (tls_type
& GOT_TLS_IE
) == 0))
2154 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
2155 tls_type
= old_tls_type
;
2156 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2157 && GOT_TLS_GD_ANY_P (tls_type
))
2158 tls_type
|= old_tls_type
;
2162 name
= h
->root
.root
.string
;
2164 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2167 /* xgettext:c-format */
2168 (_("%B: `%s' accessed both as normal and "
2169 "thread local symbol"),
2171 bfd_set_error (bfd_error_bad_value
);
2176 if (old_tls_type
!= tls_type
)
2179 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
2181 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2189 if (htab
->elf
.sgot
== NULL
)
2191 if (htab
->elf
.dynobj
== NULL
)
2192 htab
->elf
.dynobj
= abfd
;
2193 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2196 if (r_type
!= R_386_TLS_IE
)
2199 eh
->has_got_reloc
= 1;
2204 case R_386_TLS_LE_32
:
2207 eh
->has_got_reloc
= 1;
2208 if (bfd_link_executable (info
))
2210 info
->flags
|= DF_STATIC_TLS
;
2215 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2216 eh
->has_non_got_reloc
= 1;
2218 /* We are called after all symbols have been resolved. Only
2219 relocation against STT_GNU_IFUNC symbol must go through
2222 && (bfd_link_executable (info
)
2223 || h
->type
== STT_GNU_IFUNC
))
2225 /* If this reloc is in a read-only section, we might
2226 need a copy reloc. We can't check reliably at this
2227 stage whether the section is read-only, as input
2228 sections have not yet been mapped to output sections.
2229 Tentatively set the flag for now, and correct in
2230 adjust_dynamic_symbol. */
2233 /* We may need a .plt entry if the symbol is a function
2234 defined in a shared lib or is a STT_GNU_IFUNC function
2235 referenced from the code or read-only section. */
2237 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2238 h
->plt
.refcount
+= 1;
2240 if (r_type
== R_386_PC32
)
2242 /* Since something like ".long foo - ." may be used
2243 as pointer, make sure that PLT is used if foo is
2244 a function defined in a shared library. */
2245 if ((sec
->flags
& SEC_CODE
) == 0)
2246 h
->pointer_equality_needed
= 1;
2247 else if (h
->type
== STT_GNU_IFUNC
2248 && bfd_link_pic (info
))
2251 name
= h
->root
.root
.string
;
2253 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2256 /* xgettext:c-format */
2257 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2259 bfd_set_error (bfd_error_bad_value
);
2265 h
->pointer_equality_needed
= 1;
2266 /* R_386_32 can be resolved at run-time. */
2267 if (r_type
== R_386_32
2268 && (sec
->flags
& SEC_READONLY
) == 0)
2269 eh
->func_pointer_refcount
+= 1;
2275 /* If we are creating a shared library, and this is a reloc
2276 against a global symbol, or a non PC relative reloc
2277 against a local symbol, then we need to copy the reloc
2278 into the shared library. However, if we are linking with
2279 -Bsymbolic, we do not need to copy a reloc against a
2280 global symbol which is defined in an object we are
2281 including in the link (i.e., DEF_REGULAR is set). At
2282 this point we have not seen all the input files, so it is
2283 possible that DEF_REGULAR is not set now but will be set
2284 later (it is never cleared). In case of a weak definition,
2285 DEF_REGULAR may be cleared later by a strong definition in
2286 a shared library. We account for that possibility below by
2287 storing information in the relocs_copied field of the hash
2288 table entry. A similar situation occurs when creating
2289 shared libraries and symbol visibility changes render the
2292 If on the other hand, we are creating an executable, we
2293 may need to keep relocations for symbols satisfied by a
2294 dynamic library if we manage to avoid copy relocs for the
2297 Generate dynamic pointer relocation against STT_GNU_IFUNC
2298 symbol in the non-code section. */
2299 if ((bfd_link_pic (info
)
2300 && (r_type
!= R_386_PC32
2302 && (! (bfd_link_pie (info
)
2303 || SYMBOLIC_BIND (info
, h
))
2304 || h
->root
.type
== bfd_link_hash_defweak
2305 || !h
->def_regular
))))
2307 && h
->type
== STT_GNU_IFUNC
2308 && r_type
== R_386_32
2309 && (sec
->flags
& SEC_CODE
) == 0)
2310 || (ELIMINATE_COPY_RELOCS
2311 && !bfd_link_pic (info
)
2313 && (h
->root
.type
== bfd_link_hash_defweak
2314 || !h
->def_regular
)))
2316 struct elf_dyn_relocs
*p
;
2317 struct elf_dyn_relocs
**head
;
2319 /* We must copy these reloc types into the output file.
2320 Create a reloc section in dynobj and make room for
2324 if (htab
->elf
.dynobj
== NULL
)
2325 htab
->elf
.dynobj
= abfd
;
2327 sreloc
= _bfd_elf_make_dynamic_reloc_section
2328 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
2334 /* If this is a global symbol, we count the number of
2335 relocations we need for this symbol. */
2338 head
= &eh
->dyn_relocs
;
2342 /* Track dynamic relocs needed for local syms too.
2343 We really need local syms available to do this
2348 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2353 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2357 vpp
= &elf_section_data (s
)->local_dynrel
;
2358 head
= (struct elf_dyn_relocs
**)vpp
;
2362 if (p
== NULL
|| p
->sec
!= sec
)
2364 bfd_size_type amt
= sizeof *p
;
2365 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
2377 /* Count size relocation as PC-relative relocation. */
2378 if (r_type
== R_386_PC32
|| size_reloc
)
2383 /* This relocation describes the C++ object vtable hierarchy.
2384 Reconstruct it for later use during GC. */
2385 case R_386_GNU_VTINHERIT
:
2386 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2390 /* This relocation describes which C++ vtable entries are actually
2391 used. Record for later use during GC. */
2392 case R_386_GNU_VTENTRY
:
2393 BFD_ASSERT (h
!= NULL
);
2395 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2403 if (r_type
== R_386_GOT32X
2404 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2405 sec
->need_convert_load
= 1;
2408 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2410 if (!info
->keep_memory
)
2414 /* Cache the section contents for elf_link_input_bfd. */
2415 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2422 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2424 sec
->check_relocs_failed
= 1;
2428 /* Return the section that should be marked against GC for a given
2432 elf_i386_gc_mark_hook (asection
*sec
,
2433 struct bfd_link_info
*info
,
2434 Elf_Internal_Rela
*rel
,
2435 struct elf_link_hash_entry
*h
,
2436 Elf_Internal_Sym
*sym
)
2439 switch (ELF32_R_TYPE (rel
->r_info
))
2441 case R_386_GNU_VTINHERIT
:
2442 case R_386_GNU_VTENTRY
:
2446 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2449 /* Remove undefined weak symbol from the dynamic symbol table if it
2450 is resolved to 0. */
2453 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2454 struct elf_link_hash_entry
*h
)
2456 if (h
->dynindx
!= -1
2457 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2458 elf_i386_hash_entry (h
)->has_got_reloc
,
2459 elf_i386_hash_entry (h
)))
2462 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2468 /* Adjust a symbol defined by a dynamic object and referenced by a
2469 regular object. The current definition is in some section of the
2470 dynamic object, but we're not including those sections. We have to
2471 change the definition to something the rest of the link can
2475 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2476 struct elf_link_hash_entry
*h
)
2478 struct elf_i386_link_hash_table
*htab
;
2480 struct elf_i386_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2483 /* STT_GNU_IFUNC symbol must go through PLT. */
2484 if (h
->type
== STT_GNU_IFUNC
)
2486 /* All local STT_GNU_IFUNC references must be treate as local
2487 calls via local PLT. */
2489 && SYMBOL_CALLS_LOCAL (info
, h
))
2491 bfd_size_type pc_count
= 0, count
= 0;
2492 struct elf_dyn_relocs
**pp
;
2494 eh
= (struct elf_i386_link_hash_entry
*) h
;
2495 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2497 pc_count
+= p
->pc_count
;
2498 p
->count
-= p
->pc_count
;
2507 if (pc_count
|| count
)
2512 /* Increment PLT reference count only for PC-relative
2515 if (h
->plt
.refcount
<= 0)
2516 h
->plt
.refcount
= 1;
2518 h
->plt
.refcount
+= 1;
2523 if (h
->plt
.refcount
<= 0)
2525 h
->plt
.offset
= (bfd_vma
) -1;
2531 /* If this is a function, put it in the procedure linkage table. We
2532 will fill in the contents of the procedure linkage table later,
2533 when we know the address of the .got section. */
2534 if (h
->type
== STT_FUNC
2537 if (h
->plt
.refcount
<= 0
2538 || SYMBOL_CALLS_LOCAL (info
, h
)
2539 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2540 && h
->root
.type
== bfd_link_hash_undefweak
))
2542 /* This case can occur if we saw a PLT32 reloc in an input
2543 file, but the symbol was never referred to by a dynamic
2544 object, or if all references were garbage collected. In
2545 such a case, we don't actually need to build a procedure
2546 linkage table, and we can just do a PC32 reloc instead. */
2547 h
->plt
.offset
= (bfd_vma
) -1;
2554 /* It's possible that we incorrectly decided a .plt reloc was
2555 needed for an R_386_PC32 reloc to a non-function sym in
2556 check_relocs. We can't decide accurately between function and
2557 non-function syms in check-relocs; Objects loaded later in
2558 the link may change h->type. So fix it now. */
2559 h
->plt
.offset
= (bfd_vma
) -1;
2561 /* If this is a weak symbol, and there is a real definition, the
2562 processor independent code will have arranged for us to see the
2563 real definition first, and we can just use the same value. */
2564 if (h
->u
.weakdef
!= NULL
)
2566 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2567 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2568 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2569 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2570 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2571 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2575 /* This is a reference to a symbol defined by a dynamic object which
2576 is not a function. */
2578 /* If we are creating a shared library, we must presume that the
2579 only references to the symbol are via the global offset table.
2580 For such cases we need not do anything here; the relocations will
2581 be handled correctly by relocate_section. */
2582 if (!bfd_link_executable (info
))
2585 /* If there are no references to this symbol that do not use the
2586 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2588 eh
= (struct elf_i386_link_hash_entry
*) h
;
2589 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2592 /* If -z nocopyreloc was given, we won't generate them either. */
2593 if (info
->nocopyreloc
)
2599 htab
= elf_i386_hash_table (info
);
2603 /* If there aren't any dynamic relocs in read-only sections nor
2604 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2605 avoid the copy reloc. This doesn't work on VxWorks, where we can
2606 not have dynamic relocations (other than copy and jump slot
2607 relocations) in an executable. */
2608 if (ELIMINATE_COPY_RELOCS
2610 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2612 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2614 s
= p
->sec
->output_section
;
2615 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2626 /* We must allocate the symbol in our .dynbss section, which will
2627 become part of the .bss section of the executable. There will be
2628 an entry for this symbol in the .dynsym section. The dynamic
2629 object will contain position independent code, so all references
2630 from the dynamic object to this symbol will go through the global
2631 offset table. The dynamic linker will use the .dynsym entry to
2632 determine the address it must put in the global offset table, so
2633 both the dynamic object and the regular object will refer to the
2634 same memory location for the variable. */
2636 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2637 copy the initial value out of the dynamic object and into the
2638 runtime process image. */
2639 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2641 s
= htab
->elf
.sdynrelro
;
2642 srel
= htab
->elf
.sreldynrelro
;
2646 s
= htab
->elf
.sdynbss
;
2647 srel
= htab
->elf
.srelbss
;
2649 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2651 srel
->size
+= sizeof (Elf32_External_Rel
);
2655 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2658 /* Allocate space in .plt, .got and associated reloc sections for
2662 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2664 struct bfd_link_info
*info
;
2665 struct elf_i386_link_hash_table
*htab
;
2666 struct elf_i386_link_hash_entry
*eh
;
2667 struct elf_dyn_relocs
*p
;
2668 unsigned plt_entry_size
;
2669 bfd_boolean resolved_to_zero
;
2671 if (h
->root
.type
== bfd_link_hash_indirect
)
2674 eh
= (struct elf_i386_link_hash_entry
*) h
;
2676 info
= (struct bfd_link_info
*) inf
;
2677 htab
= elf_i386_hash_table (info
);
2681 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2683 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2687 /* Clear the reference count of function pointer relocations if
2688 symbol isn't a normal function. */
2689 if (h
->type
!= STT_FUNC
)
2690 eh
->func_pointer_refcount
= 0;
2692 /* We can't use the GOT PLT if pointer equality is needed since
2693 finish_dynamic_symbol won't clear symbol value and the dynamic
2694 linker won't update the GOT slot. We will get into an infinite
2695 loop at run-time. */
2696 if (htab
->plt_got
!= NULL
2697 && h
->type
!= STT_GNU_IFUNC
2698 && !h
->pointer_equality_needed
2699 && h
->plt
.refcount
> 0
2700 && h
->got
.refcount
> 0)
2702 /* Don't use the regular PLT if there are both GOT and GOTPLT
2704 h
->plt
.offset
= (bfd_vma
) -1;
2706 /* Use the GOT PLT. */
2707 eh
->plt_got
.refcount
= 1;
2710 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2711 here if it is defined and referenced in a non-shared object. */
2712 if (h
->type
== STT_GNU_IFUNC
2714 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2715 &htab
->readonly_dynrelocs_against_ifunc
,
2717 plt_entry_size
, 4, TRUE
);
2718 /* Don't create the PLT entry if there are only function pointer
2719 relocations which can be resolved at run-time. */
2720 else if (htab
->elf
.dynamic_sections_created
2721 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2722 || eh
->plt_got
.refcount
> 0))
2724 bfd_boolean use_plt_got
;
2726 /* Clear the reference count of function pointer relocations
2728 eh
->func_pointer_refcount
= 0;
2730 if (htab
->plt_got
!= NULL
2731 && (info
->flags
& DF_BIND_NOW
)
2732 && !h
->pointer_equality_needed
)
2734 /* Don't use the regular PLT for DF_BIND_NOW. */
2735 h
->plt
.offset
= (bfd_vma
) -1;
2737 /* Use the GOT PLT. */
2738 h
->got
.refcount
= 1;
2739 eh
->plt_got
.refcount
= 1;
2742 use_plt_got
= eh
->plt_got
.refcount
> 0;
2744 /* Make sure this symbol is output as a dynamic symbol.
2745 Undefined weak syms won't yet be marked as dynamic. */
2746 if (h
->dynindx
== -1
2748 && !resolved_to_zero
2749 && h
->root
.type
== bfd_link_hash_undefweak
)
2751 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2755 if (bfd_link_pic (info
)
2756 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2758 asection
*s
= htab
->elf
.splt
;
2759 asection
*got_s
= htab
->plt_got
;
2761 /* If this is the first .plt entry, make room for the special
2762 first entry. The .plt section is used by prelink to undo
2763 prelinking for dynamic relocations. */
2765 s
->size
= plt_entry_size
;
2768 eh
->plt_got
.offset
= got_s
->size
;
2770 h
->plt
.offset
= s
->size
;
2772 /* If this symbol is not defined in a regular file, and we are
2773 not generating a shared library, then set the symbol to this
2774 location in the .plt. This is required to make function
2775 pointers compare as equal between the normal executable and
2776 the shared library. */
2777 if (! bfd_link_pic (info
)
2782 /* We need to make a call to the entry of the GOT PLT
2783 instead of regular PLT entry. */
2784 h
->root
.u
.def
.section
= got_s
;
2785 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2789 h
->root
.u
.def
.section
= s
;
2790 h
->root
.u
.def
.value
= h
->plt
.offset
;
2794 /* Make room for this entry. */
2796 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2799 s
->size
+= plt_entry_size
;
2801 /* We also need to make an entry in the .got.plt section,
2802 which will be placed in the .got section by the linker
2804 htab
->elf
.sgotplt
->size
+= 4;
2806 /* There should be no PLT relocation against resolved
2807 undefined weak symbol in executable. */
2808 if (!resolved_to_zero
)
2810 /* We also need to make an entry in the .rel.plt
2812 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2813 htab
->elf
.srelplt
->reloc_count
++;
2817 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2818 && !bfd_link_pic (info
))
2820 /* VxWorks has a second set of relocations for each PLT entry
2821 in executables. They go in a separate relocation section,
2822 which is processed by the kernel loader. */
2824 /* There are two relocations for the initial PLT entry: an
2825 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2826 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2828 if (h
->plt
.offset
== plt_entry_size
)
2829 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2831 /* There are two extra relocations for each subsequent PLT entry:
2832 an R_386_32 relocation for the GOT entry, and an R_386_32
2833 relocation for the PLT entry. */
2835 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2840 eh
->plt_got
.offset
= (bfd_vma
) -1;
2841 h
->plt
.offset
= (bfd_vma
) -1;
2847 eh
->plt_got
.offset
= (bfd_vma
) -1;
2848 h
->plt
.offset
= (bfd_vma
) -1;
2852 eh
->tlsdesc_got
= (bfd_vma
) -1;
2854 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2855 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2856 if (h
->got
.refcount
> 0
2857 && bfd_link_executable (info
)
2859 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2860 h
->got
.offset
= (bfd_vma
) -1;
2861 else if (h
->got
.refcount
> 0)
2865 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2867 /* Make sure this symbol is output as a dynamic symbol.
2868 Undefined weak syms won't yet be marked as dynamic. */
2869 if (h
->dynindx
== -1
2871 && !resolved_to_zero
2872 && h
->root
.type
== bfd_link_hash_undefweak
)
2874 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2879 if (GOT_TLS_GDESC_P (tls_type
))
2881 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2882 - elf_i386_compute_jump_table_size (htab
);
2883 htab
->elf
.sgotplt
->size
+= 8;
2884 h
->got
.offset
= (bfd_vma
) -2;
2886 if (! GOT_TLS_GDESC_P (tls_type
)
2887 || GOT_TLS_GD_P (tls_type
))
2889 h
->got
.offset
= s
->size
;
2891 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2892 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2895 dyn
= htab
->elf
.dynamic_sections_created
;
2896 /* R_386_TLS_IE_32 needs one dynamic relocation,
2897 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2898 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2899 need two), R_386_TLS_GD needs one if local symbol and two if
2900 global. No dynamic relocation against resolved undefined weak
2901 symbol in executable. */
2902 if (tls_type
== GOT_TLS_IE_BOTH
)
2903 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2904 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2905 || (tls_type
& GOT_TLS_IE
))
2906 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2907 else if (GOT_TLS_GD_P (tls_type
))
2908 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2909 else if (! GOT_TLS_GDESC_P (tls_type
)
2910 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2911 && !resolved_to_zero
)
2912 || h
->root
.type
!= bfd_link_hash_undefweak
)
2913 && (bfd_link_pic (info
)
2914 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2915 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2916 if (GOT_TLS_GDESC_P (tls_type
))
2917 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2920 h
->got
.offset
= (bfd_vma
) -1;
2922 if (eh
->dyn_relocs
== NULL
)
2925 /* In the shared -Bsymbolic case, discard space allocated for
2926 dynamic pc-relative relocs against symbols which turn out to be
2927 defined in regular objects. For the normal shared case, discard
2928 space for pc-relative relocs that have become local due to symbol
2929 visibility changes. */
2931 if (bfd_link_pic (info
))
2933 /* The only reloc that uses pc_count is R_386_PC32, which will
2934 appear on a call or on something like ".long foo - .". We
2935 want calls to protected symbols to resolve directly to the
2936 function rather than going via the plt. If people want
2937 function pointer comparisons to work as expected then they
2938 should avoid writing assembly like ".long foo - .". */
2939 if (SYMBOL_CALLS_LOCAL (info
, h
))
2941 struct elf_dyn_relocs
**pp
;
2943 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2945 p
->count
-= p
->pc_count
;
2954 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2956 struct elf_dyn_relocs
**pp
;
2957 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2959 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2966 /* Also discard relocs on undefined weak syms with non-default
2967 visibility or in PIE. */
2968 if (eh
->dyn_relocs
!= NULL
2969 && h
->root
.type
== bfd_link_hash_undefweak
)
2971 /* Undefined weak symbol is never bound locally in shared
2973 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2974 || resolved_to_zero
)
2978 /* Keep dynamic non-GOT/non-PLT relocation so that we
2979 can branch to 0 without PLT. */
2980 struct elf_dyn_relocs
**pp
;
2982 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2983 if (p
->pc_count
== 0)
2987 /* Remove non-R_386_PC32 relocation. */
2988 p
->count
= p
->pc_count
;
2992 if (eh
->dyn_relocs
!= NULL
)
2994 /* Make sure undefined weak symbols are output
2995 as dynamic symbols in PIEs for dynamic non-GOT
2996 non-PLT reloations. */
2997 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3002 eh
->dyn_relocs
= NULL
;
3004 else if (h
->dynindx
== -1
3005 && !h
->forced_local
)
3007 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3012 else if (ELIMINATE_COPY_RELOCS
)
3014 /* For the non-shared case, discard space for relocs against
3015 symbols which turn out to need copy relocs or are not
3016 dynamic. Keep dynamic relocations for run-time function
3017 pointer initialization. */
3019 if ((!h
->non_got_ref
3020 || eh
->func_pointer_refcount
> 0
3021 || (h
->root
.type
== bfd_link_hash_undefweak
3022 && !resolved_to_zero
))
3025 || (htab
->elf
.dynamic_sections_created
3026 && (h
->root
.type
== bfd_link_hash_undefweak
3027 || h
->root
.type
== bfd_link_hash_undefined
))))
3029 /* Make sure this symbol is output as a dynamic symbol.
3030 Undefined weak syms won't yet be marked as dynamic. */
3031 if (h
->dynindx
== -1
3033 && !resolved_to_zero
3034 && h
->root
.type
== bfd_link_hash_undefweak
)
3036 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3040 /* If that succeeded, we know we'll be keeping all the
3042 if (h
->dynindx
!= -1)
3046 eh
->dyn_relocs
= NULL
;
3047 eh
->func_pointer_refcount
= 0;
3052 /* Finally, allocate space. */
3053 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3057 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3059 BFD_ASSERT (sreloc
!= NULL
);
3060 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3066 /* Allocate space in .plt, .got and associated reloc sections for
3067 local dynamic relocs. */
3070 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
3072 struct elf_link_hash_entry
*h
3073 = (struct elf_link_hash_entry
*) *slot
;
3075 if (h
->type
!= STT_GNU_IFUNC
3079 || h
->root
.type
!= bfd_link_hash_defined
)
3082 return elf_i386_allocate_dynrelocs (h
, inf
);
3085 /* Find any dynamic relocs that apply to read-only sections. */
3088 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
3090 struct elf_i386_link_hash_entry
*eh
;
3091 struct elf_dyn_relocs
*p
;
3093 /* Skip local IFUNC symbols. */
3094 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3097 eh
= (struct elf_i386_link_hash_entry
*) h
;
3098 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3100 asection
*s
= p
->sec
->output_section
;
3102 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3104 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3106 info
->flags
|= DF_TEXTREL
;
3108 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3109 || info
->error_textrel
)
3110 /* xgettext:c-format */
3111 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3112 p
->sec
->owner
, h
->root
.root
.string
,
3115 /* Not an error, just cut short the traversal. */
3122 /* Convert load via the GOT slot to load immediate. */
3125 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
3126 struct bfd_link_info
*link_info
)
3128 struct elf_i386_link_hash_table
*htab
;
3129 Elf_Internal_Shdr
*symtab_hdr
;
3130 Elf_Internal_Rela
*internal_relocs
;
3131 Elf_Internal_Rela
*irel
, *irelend
;
3133 bfd_boolean changed
;
3134 bfd_signed_vma
*local_got_refcounts
;
3136 /* Don't even try to convert non-ELF outputs. */
3137 if (!is_elf_hash_table (link_info
->hash
))
3140 /* Nothing to do if there is no need or no output. */
3141 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3142 || sec
->need_convert_load
== 0
3143 || bfd_is_abs_section (sec
->output_section
))
3146 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3148 /* Load the relocations for this section. */
3149 internal_relocs
= (_bfd_elf_link_read_relocs
3150 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3151 link_info
->keep_memory
));
3152 if (internal_relocs
== NULL
)
3156 htab
= elf_i386_hash_table (link_info
);
3157 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3159 /* Get the section contents. */
3160 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3161 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3164 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3168 irelend
= internal_relocs
+ sec
->reloc_count
;
3169 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3171 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3172 unsigned int r_symndx
;
3173 struct elf_link_hash_entry
*h
;
3174 bfd_boolean converted
;
3176 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3177 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3178 if (r_type
!= R_386_GOT32X
)
3181 r_symndx
= ELF32_R_SYM (irel
->r_info
);
3182 if (r_symndx
< symtab_hdr
->sh_info
)
3183 h
= elf_i386_get_local_sym_hash (htab
, sec
->owner
,
3184 (const Elf_Internal_Rela
*) irel
,
3188 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3189 while (h
->root
.type
== bfd_link_hash_indirect
3190 || h
->root
.type
== bfd_link_hash_warning
)
3191 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3194 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3195 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3199 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
3200 irel
, h
, &converted
, link_info
))
3205 changed
= converted
;
3208 if (h
->got
.refcount
> 0)
3209 h
->got
.refcount
-= 1;
3213 if (local_got_refcounts
!= NULL
3214 && local_got_refcounts
[r_symndx
] > 0)
3215 local_got_refcounts
[r_symndx
] -= 1;
3220 if (contents
!= NULL
3221 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3223 if (!changed
&& !link_info
->keep_memory
)
3227 /* Cache the section contents for elf_link_input_bfd. */
3228 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3232 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3235 free (internal_relocs
);
3237 elf_section_data (sec
)->relocs
= internal_relocs
;
3243 if (contents
!= NULL
3244 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3246 if (internal_relocs
!= NULL
3247 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3248 free (internal_relocs
);
3252 /* Set the sizes of the dynamic sections. */
3255 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3257 struct elf_i386_link_hash_table
*htab
;
3263 htab
= elf_i386_hash_table (info
);
3266 dynobj
= htab
->elf
.dynobj
;
3270 /* Set up .got offsets for local syms, and space for local dynamic
3272 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3274 bfd_signed_vma
*local_got
;
3275 bfd_signed_vma
*end_local_got
;
3276 char *local_tls_type
;
3277 bfd_vma
*local_tlsdesc_gotent
;
3278 bfd_size_type locsymcount
;
3279 Elf_Internal_Shdr
*symtab_hdr
;
3282 if (! is_i386_elf (ibfd
))
3285 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3287 struct elf_dyn_relocs
*p
;
3289 if (!elf_i386_convert_load (ibfd
, s
, info
))
3292 for (p
= ((struct elf_dyn_relocs
*)
3293 elf_section_data (s
)->local_dynrel
);
3297 if (!bfd_is_abs_section (p
->sec
)
3298 && bfd_is_abs_section (p
->sec
->output_section
))
3300 /* Input section has been discarded, either because
3301 it is a copy of a linkonce section or due to
3302 linker script /DISCARD/, so we'll be discarding
3305 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3306 && strcmp (p
->sec
->output_section
->name
,
3309 /* Relocations in vxworks .tls_vars sections are
3310 handled specially by the loader. */
3312 else if (p
->count
!= 0)
3314 srel
= elf_section_data (p
->sec
)->sreloc
;
3315 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3316 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3317 && (info
->flags
& DF_TEXTREL
) == 0)
3319 info
->flags
|= DF_TEXTREL
;
3320 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3321 || info
->error_textrel
)
3322 /* xgettext:c-format */
3323 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3324 p
->sec
->owner
, p
->sec
);
3330 local_got
= elf_local_got_refcounts (ibfd
);
3334 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3335 locsymcount
= symtab_hdr
->sh_info
;
3336 end_local_got
= local_got
+ locsymcount
;
3337 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3338 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3340 srel
= htab
->elf
.srelgot
;
3341 for (; local_got
< end_local_got
;
3342 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3344 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3347 if (GOT_TLS_GDESC_P (*local_tls_type
))
3349 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3350 - elf_i386_compute_jump_table_size (htab
);
3351 htab
->elf
.sgotplt
->size
+= 8;
3352 *local_got
= (bfd_vma
) -2;
3354 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3355 || GOT_TLS_GD_P (*local_tls_type
))
3357 *local_got
= s
->size
;
3359 if (GOT_TLS_GD_P (*local_tls_type
)
3360 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3363 if (bfd_link_pic (info
)
3364 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3365 || (*local_tls_type
& GOT_TLS_IE
))
3367 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3368 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3369 else if (GOT_TLS_GD_P (*local_tls_type
)
3370 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3371 srel
->size
+= sizeof (Elf32_External_Rel
);
3372 if (GOT_TLS_GDESC_P (*local_tls_type
))
3373 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3377 *local_got
= (bfd_vma
) -1;
3381 if (htab
->tls_ldm_got
.refcount
> 0)
3383 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3385 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3386 htab
->elf
.sgot
->size
+= 8;
3387 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3390 htab
->tls_ldm_got
.offset
= -1;
3392 /* Allocate global sym .plt and .got entries, and space for global
3393 sym dynamic relocs. */
3394 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3396 /* Allocate .plt and .got entries, and space for local symbols. */
3397 htab_traverse (htab
->loc_hash_table
,
3398 elf_i386_allocate_local_dynrelocs
,
3401 /* For every jump slot reserved in the sgotplt, reloc_count is
3402 incremented. However, when we reserve space for TLS descriptors,
3403 it's not incremented, so in order to compute the space reserved
3404 for them, it suffices to multiply the reloc count by the jump
3407 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3408 so that R_386_IRELATIVE entries come last. */
3409 if (htab
->elf
.srelplt
)
3411 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3412 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3413 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3415 else if (htab
->elf
.irelplt
)
3416 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3419 if (htab
->elf
.sgotplt
)
3421 /* Don't allocate .got.plt section if there are no GOT nor PLT
3422 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3423 if ((htab
->elf
.hgot
== NULL
3424 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3425 && (htab
->elf
.sgotplt
->size
3426 == get_elf_backend_data (output_bfd
)->got_header_size
)
3427 && (htab
->elf
.splt
== NULL
3428 || htab
->elf
.splt
->size
== 0)
3429 && (htab
->elf
.sgot
== NULL
3430 || htab
->elf
.sgot
->size
== 0)
3431 && (htab
->elf
.iplt
== NULL
3432 || htab
->elf
.iplt
->size
== 0)
3433 && (htab
->elf
.igotplt
== NULL
3434 || htab
->elf
.igotplt
->size
== 0))
3435 htab
->elf
.sgotplt
->size
= 0;
3438 if (_bfd_elf_eh_frame_present (info
))
3440 if (htab
->plt_eh_frame
!= NULL
3441 && htab
->elf
.splt
!= NULL
3442 && htab
->elf
.splt
->size
!= 0
3443 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3444 htab
->plt_eh_frame
->size
3445 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_size
;
3447 if (htab
->plt_got_eh_frame
!= NULL
3448 && htab
->plt_got
!= NULL
3449 && htab
->plt_got
->size
!= 0
3450 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3451 htab
->plt_got_eh_frame
->size
3452 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got_size
;
3455 /* We now have determined the sizes of the various dynamic sections.
3456 Allocate memory for them. */
3458 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3460 bfd_boolean strip_section
= TRUE
;
3462 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3465 if (s
== htab
->elf
.splt
3466 || s
== htab
->elf
.sgot
)
3468 /* Strip this section if we don't need it; see the
3470 /* We'd like to strip these sections if they aren't needed, but if
3471 we've exported dynamic symbols from them we must leave them.
3472 It's too late to tell BFD to get rid of the symbols. */
3474 if (htab
->elf
.hplt
!= NULL
)
3475 strip_section
= FALSE
;
3477 else if (s
== htab
->elf
.sgotplt
3478 || s
== htab
->elf
.iplt
3479 || s
== htab
->elf
.igotplt
3480 || s
== htab
->plt_got
3481 || s
== htab
->plt_eh_frame
3482 || s
== htab
->plt_got_eh_frame
3483 || s
== htab
->elf
.sdynbss
3484 || s
== htab
->elf
.sdynrelro
)
3486 /* Strip these too. */
3488 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3491 && s
!= htab
->elf
.srelplt
3492 && s
!= htab
->srelplt2
)
3495 /* We use the reloc_count field as a counter if we need
3496 to copy relocs into the output file. */
3501 /* It's not one of our sections, so don't allocate space. */
3507 /* If we don't need this section, strip it from the
3508 output file. This is mostly to handle .rel.bss and
3509 .rel.plt. We must create both sections in
3510 create_dynamic_sections, because they must be created
3511 before the linker maps input sections to output
3512 sections. The linker does that before
3513 adjust_dynamic_symbol is called, and it is that
3514 function which decides whether anything needs to go
3515 into these sections. */
3517 s
->flags
|= SEC_EXCLUDE
;
3521 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3524 /* Allocate memory for the section contents. We use bfd_zalloc
3525 here in case unused entries are not reclaimed before the
3526 section's contents are written out. This should not happen,
3527 but this way if it does, we get a R_386_NONE reloc instead
3529 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3530 if (s
->contents
== NULL
)
3534 if (htab
->plt_eh_frame
!= NULL
3535 && htab
->plt_eh_frame
->contents
!= NULL
)
3537 memcpy (htab
->plt_eh_frame
->contents
,
3538 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt
,
3539 htab
->plt_eh_frame
->size
);
3540 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3541 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3544 if (htab
->plt_got_eh_frame
!= NULL
3545 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3547 memcpy (htab
->plt_got_eh_frame
->contents
,
3548 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got
,
3549 htab
->plt_got_eh_frame
->size
);
3550 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3551 (htab
->plt_got_eh_frame
->contents
3552 + PLT_FDE_LEN_OFFSET
));
3555 if (htab
->elf
.dynamic_sections_created
)
3557 /* Add some entries to the .dynamic section. We fill in the
3558 values later, in elf_i386_finish_dynamic_sections, but we
3559 must add the entries now so that we get the correct size for
3560 the .dynamic section. The DT_DEBUG entry is filled in by the
3561 dynamic linker and used by the debugger. */
3562 #define add_dynamic_entry(TAG, VAL) \
3563 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3565 if (bfd_link_executable (info
))
3567 if (!add_dynamic_entry (DT_DEBUG
, 0))
3571 if (htab
->elf
.splt
->size
!= 0)
3573 /* DT_PLTGOT is used by prelink even if there is no PLT
3575 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3579 if (htab
->elf
.srelplt
->size
!= 0)
3581 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3582 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3583 || !add_dynamic_entry (DT_JMPREL
, 0))
3589 if (!add_dynamic_entry (DT_REL
, 0)
3590 || !add_dynamic_entry (DT_RELSZ
, 0)
3591 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3594 /* If any dynamic relocs apply to a read-only section,
3595 then we need a DT_TEXTREL entry. */
3596 if ((info
->flags
& DF_TEXTREL
) == 0)
3597 elf_link_hash_traverse (&htab
->elf
,
3598 elf_i386_readonly_dynrelocs
, info
);
3600 if ((info
->flags
& DF_TEXTREL
) != 0)
3602 if (htab
->readonly_dynrelocs_against_ifunc
)
3604 info
->callbacks
->einfo
3605 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3606 bfd_set_error (bfd_error_bad_value
);
3610 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3614 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3615 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3618 #undef add_dynamic_entry
3624 elf_i386_always_size_sections (bfd
*output_bfd
,
3625 struct bfd_link_info
*info
)
3627 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3631 struct elf_link_hash_entry
*tlsbase
;
3633 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3634 "_TLS_MODULE_BASE_",
3635 FALSE
, FALSE
, FALSE
);
3637 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3639 struct elf_i386_link_hash_table
*htab
;
3640 struct bfd_link_hash_entry
*bh
= NULL
;
3641 const struct elf_backend_data
*bed
3642 = get_elf_backend_data (output_bfd
);
3644 htab
= elf_i386_hash_table (info
);
3648 if (!(_bfd_generic_link_add_one_symbol
3649 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3650 tls_sec
, 0, NULL
, FALSE
,
3651 bed
->collect
, &bh
)))
3654 htab
->tls_module_base
= bh
;
3656 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3657 tlsbase
->def_regular
= 1;
3658 tlsbase
->other
= STV_HIDDEN
;
3659 tlsbase
->root
.linker_def
= 1;
3660 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3667 /* Set the correct type for an x86 ELF section. We do this by the
3668 section name, which is a hack, but ought to work. */
3671 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3672 Elf_Internal_Shdr
*hdr
,
3677 name
= bfd_get_section_name (abfd
, sec
);
3679 /* This is an ugly, but unfortunately necessary hack that is
3680 needed when producing EFI binaries on x86. It tells
3681 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3682 containing ELF relocation info. We need this hack in order to
3683 be able to generate ELF binaries that can be translated into
3684 EFI applications (which are essentially COFF objects). Those
3685 files contain a COFF ".reloc" section inside an ELFNN object,
3686 which would normally cause BFD to segfault because it would
3687 attempt to interpret this section as containing relocation
3688 entries for section "oc". With this hack enabled, ".reloc"
3689 will be treated as a normal data section, which will avoid the
3690 segfault. However, you won't be able to create an ELFNN binary
3691 with a section named "oc" that needs relocations, but that's
3692 the kind of ugly side-effects you get when detecting section
3693 types based on their names... In practice, this limitation is
3694 unlikely to bite. */
3695 if (strcmp (name
, ".reloc") == 0)
3696 hdr
->sh_type
= SHT_PROGBITS
;
3701 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3702 executables. Rather than setting it to the beginning of the TLS
3703 section, we have to set it to the end. This function may be called
3704 multiple times, it is idempotent. */
3707 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3709 struct elf_i386_link_hash_table
*htab
;
3710 struct bfd_link_hash_entry
*base
;
3712 if (!bfd_link_executable (info
))
3715 htab
= elf_i386_hash_table (info
);
3719 base
= htab
->tls_module_base
;
3723 base
->u
.def
.value
= htab
->elf
.tls_size
;
3726 /* Return the base VMA address which should be subtracted from real addresses
3727 when resolving @dtpoff relocation.
3728 This is PT_TLS segment p_vaddr. */
3731 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3733 /* If tls_sec is NULL, we should have signalled an error already. */
3734 if (elf_hash_table (info
)->tls_sec
== NULL
)
3736 return elf_hash_table (info
)->tls_sec
->vma
;
3739 /* Return the relocation value for @tpoff relocation
3740 if STT_TLS virtual address is ADDRESS. */
3743 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3745 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3746 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3747 bfd_vma static_tls_size
;
3749 /* If tls_sec is NULL, we should have signalled an error already. */
3750 if (htab
->tls_sec
== NULL
)
3753 /* Consider special static TLS alignment requirements. */
3754 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3755 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3758 /* Relocate an i386 ELF section. */
3761 elf_i386_relocate_section (bfd
*output_bfd
,
3762 struct bfd_link_info
*info
,
3764 asection
*input_section
,
3766 Elf_Internal_Rela
*relocs
,
3767 Elf_Internal_Sym
*local_syms
,
3768 asection
**local_sections
)
3770 struct elf_i386_link_hash_table
*htab
;
3771 Elf_Internal_Shdr
*symtab_hdr
;
3772 struct elf_link_hash_entry
**sym_hashes
;
3773 bfd_vma
*local_got_offsets
;
3774 bfd_vma
*local_tlsdesc_gotents
;
3775 Elf_Internal_Rela
*rel
;
3776 Elf_Internal_Rela
*wrel
;
3777 Elf_Internal_Rela
*relend
;
3778 bfd_boolean is_vxworks_tls
;
3779 unsigned plt_entry_size
;
3781 BFD_ASSERT (is_i386_elf (input_bfd
));
3783 /* Skip if check_relocs failed. */
3784 if (input_section
->check_relocs_failed
)
3787 htab
= elf_i386_hash_table (info
);
3790 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3791 sym_hashes
= elf_sym_hashes (input_bfd
);
3792 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3793 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3794 /* We have to handle relocations in vxworks .tls_vars sections
3795 specially, because the dynamic loader is 'weird'. */
3796 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3797 && bfd_link_pic (info
)
3798 && !strcmp (input_section
->output_section
->name
,
3801 elf_i386_set_tls_module_base (info
);
3803 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3805 rel
= wrel
= relocs
;
3806 relend
= relocs
+ input_section
->reloc_count
;
3807 for (; rel
< relend
; wrel
++, rel
++)
3809 unsigned int r_type
;
3810 reloc_howto_type
*howto
;
3811 unsigned long r_symndx
;
3812 struct elf_link_hash_entry
*h
;
3813 struct elf_i386_link_hash_entry
*eh
;
3814 Elf_Internal_Sym
*sym
;
3816 bfd_vma off
, offplt
, plt_offset
;
3818 bfd_boolean unresolved_reloc
;
3819 bfd_reloc_status_type r
;
3823 asection
*resolved_plt
;
3824 bfd_boolean resolved_to_zero
;
3825 bfd_boolean relative_reloc
;
3827 r_type
= ELF32_R_TYPE (rel
->r_info
);
3828 if (r_type
== R_386_GNU_VTINHERIT
3829 || r_type
== R_386_GNU_VTENTRY
)
3836 if ((indx
= r_type
) >= R_386_standard
3837 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3838 >= R_386_ext
- R_386_standard
)
3839 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3840 >= R_386_ext2
- R_386_ext
))
3843 /* xgettext:c-format */
3844 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3845 input_bfd
, r_type
, input_section
);
3846 bfd_set_error (bfd_error_bad_value
);
3849 howto
= elf_howto_table
+ indx
;
3851 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3855 unresolved_reloc
= FALSE
;
3856 if (r_symndx
< symtab_hdr
->sh_info
)
3858 sym
= local_syms
+ r_symndx
;
3859 sec
= local_sections
[r_symndx
];
3860 relocation
= (sec
->output_section
->vma
3861 + sec
->output_offset
3863 st_size
= sym
->st_size
;
3865 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3866 && ((sec
->flags
& SEC_MERGE
) != 0
3867 || (bfd_link_relocatable (info
)
3868 && sec
->output_offset
!= 0)))
3871 bfd_byte
*where
= contents
+ rel
->r_offset
;
3873 switch (howto
->size
)
3876 addend
= bfd_get_8 (input_bfd
, where
);
3877 if (howto
->pc_relative
)
3879 addend
= (addend
^ 0x80) - 0x80;
3884 addend
= bfd_get_16 (input_bfd
, where
);
3885 if (howto
->pc_relative
)
3887 addend
= (addend
^ 0x8000) - 0x8000;
3892 addend
= bfd_get_32 (input_bfd
, where
);
3893 if (howto
->pc_relative
)
3895 addend
= (addend
^ 0x80000000) - 0x80000000;
3903 if (bfd_link_relocatable (info
))
3904 addend
+= sec
->output_offset
;
3907 asection
*msec
= sec
;
3908 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3910 addend
-= relocation
;
3911 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3914 switch (howto
->size
)
3917 /* FIXME: overflow checks. */
3918 if (howto
->pc_relative
)
3920 bfd_put_8 (input_bfd
, addend
, where
);
3923 if (howto
->pc_relative
)
3925 bfd_put_16 (input_bfd
, addend
, where
);
3928 if (howto
->pc_relative
)
3930 bfd_put_32 (input_bfd
, addend
, where
);
3934 else if (!bfd_link_relocatable (info
)
3935 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3937 /* Relocate against local STT_GNU_IFUNC symbol. */
3938 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3943 /* Set STT_GNU_IFUNC symbol value. */
3944 h
->root
.u
.def
.value
= sym
->st_value
;
3945 h
->root
.u
.def
.section
= sec
;
3950 bfd_boolean warned ATTRIBUTE_UNUSED
;
3951 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3953 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3954 r_symndx
, symtab_hdr
, sym_hashes
,
3956 unresolved_reloc
, warned
, ignored
);
3960 if (sec
!= NULL
&& discarded_section (sec
))
3962 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3963 contents
+ rel
->r_offset
);
3964 wrel
->r_offset
= rel
->r_offset
;
3968 /* For ld -r, remove relocations in debug sections against
3969 sections defined in discarded sections. Not done for
3970 eh_frame editing code expects to be present. */
3971 if (bfd_link_relocatable (info
)
3972 && (input_section
->flags
& SEC_DEBUGGING
))
3978 if (bfd_link_relocatable (info
))
3985 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3986 it here if it is defined in a non-shared object. */
3988 && h
->type
== STT_GNU_IFUNC
3991 asection
*plt
, *gotplt
, *base_got
;
3995 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3997 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3998 sections because such sections are not SEC_ALLOC and
3999 thus ld.so will not process them. */
4000 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
4005 /* STT_GNU_IFUNC symbol must go through PLT. */
4006 if (htab
->elf
.splt
!= NULL
)
4008 plt
= htab
->elf
.splt
;
4009 gotplt
= htab
->elf
.sgotplt
;
4013 plt
= htab
->elf
.iplt
;
4014 gotplt
= htab
->elf
.igotplt
;
4024 base_got
= htab
->elf
.sgot
;
4025 off
= h
->got
.offset
;
4027 if (base_got
== NULL
)
4030 if (off
== (bfd_vma
) -1)
4032 /* We can't use h->got.offset here to save state, or
4033 even just remember the offset, as finish_dynamic_symbol
4034 would use that as offset into .got. */
4036 if (h
->plt
.offset
== (bfd_vma
) -1)
4039 if (htab
->elf
.splt
!= NULL
)
4041 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
4042 off
= (plt_index
+ 3) * 4;
4043 base_got
= htab
->elf
.sgotplt
;
4047 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4048 off
= plt_index
* 4;
4049 base_got
= htab
->elf
.igotplt
;
4052 if (h
->dynindx
== -1
4056 /* This references the local defitionion. We must
4057 initialize this entry in the global offset table.
4058 Since the offset must always be a multiple of 8,
4059 we use the least significant bit to record
4060 whether we have initialized it already.
4062 When doing a dynamic link, we create a .rela.got
4063 relocation entry to initialize the value. This
4064 is done in the finish_dynamic_symbol routine. */
4069 bfd_put_32 (output_bfd
, relocation
,
4070 base_got
->contents
+ off
);
4078 relocation
= (base_got
->output_section
->vma
4079 + base_got
->output_offset
+ off
4080 - gotplt
->output_section
->vma
4081 - gotplt
->output_offset
);
4083 if (rel
->r_offset
> 1
4084 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4085 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4087 if (bfd_link_pic (info
))
4088 goto disallow_got32
;
4090 /* Add the GOT base if there is no base register. */
4091 relocation
+= (gotplt
->output_section
->vma
4092 + gotplt
->output_offset
);
4094 else if (htab
->elf
.splt
== NULL
)
4096 /* Adjust for static executables. */
4097 relocation
+= gotplt
->output_offset
;
4103 if (h
->plt
.offset
== (bfd_vma
) -1)
4105 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4106 if (r_type
== R_386_32
4107 && (input_section
->flags
& SEC_CODE
) == 0)
4108 goto do_ifunc_pointer
;
4109 goto bad_ifunc_reloc
;
4112 relocation
= (plt
->output_section
->vma
4113 + plt
->output_offset
+ h
->plt
.offset
);
4119 if (h
->root
.root
.string
)
4120 name
= h
->root
.root
.string
;
4122 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4125 /* xgettext:c-format */
4126 (_("%B: relocation %s against STT_GNU_IFUNC "
4127 "symbol `%s' isn't supported"), input_bfd
,
4129 bfd_set_error (bfd_error_bad_value
);
4133 /* Generate dynamic relcoation only when there is a
4134 non-GOT reference in a shared object. */
4135 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4136 || h
->plt
.offset
== (bfd_vma
) -1)
4138 Elf_Internal_Rela outrel
;
4143 /* Need a dynamic relocation to get the real function
4145 offset
= _bfd_elf_section_offset (output_bfd
,
4149 if (offset
== (bfd_vma
) -1
4150 || offset
== (bfd_vma
) -2)
4153 outrel
.r_offset
= (input_section
->output_section
->vma
4154 + input_section
->output_offset
4157 if (h
->dynindx
== -1
4159 || bfd_link_executable (info
))
4161 /* This symbol is resolved locally. */
4162 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4163 bfd_put_32 (output_bfd
,
4164 (h
->root
.u
.def
.value
4165 + h
->root
.u
.def
.section
->output_section
->vma
4166 + h
->root
.u
.def
.section
->output_offset
),
4170 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4172 /* Dynamic relocations are stored in
4173 1. .rel.ifunc section in PIC object.
4174 2. .rel.got section in dynamic executable.
4175 3. .rel.iplt section in static executable. */
4176 if (bfd_link_pic (info
))
4177 sreloc
= htab
->elf
.irelifunc
;
4178 else if (htab
->elf
.splt
!= NULL
)
4179 sreloc
= htab
->elf
.srelgot
;
4181 sreloc
= htab
->elf
.irelplt
;
4182 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4184 /* If this reloc is against an external symbol, we
4185 do not want to fiddle with the addend. Otherwise,
4186 we need to include the symbol value so that it
4187 becomes an addend for the dynamic reloc. For an
4188 internal symbol, we have updated addend. */
4197 relocation
-= (gotplt
->output_section
->vma
4198 + gotplt
->output_offset
);
4203 eh
= (struct elf_i386_link_hash_entry
*) h
;
4204 resolved_to_zero
= (eh
!= NULL
4205 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4212 /* Avoid optimizing _DYNAMIC since ld.so may use its
4213 link-time address. */
4214 if (h
== htab
->elf
.hdynamic
)
4217 if (bfd_link_pic (info
))
4219 /* It is OK to convert mov to lea and convert indirect
4220 branch to direct branch. It is OK to convert adc,
4221 add, and, cmp, or, sbb, sub, test, xor only when PIC
4223 unsigned int opcode
, addend
;
4224 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4227 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4228 if (opcode
!= 0x8b && opcode
!= 0xff)
4232 /* Resolve "mov GOT[(%reg)], %reg",
4233 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4234 and "binop foo@GOT[(%reg)], %reg". */
4236 || (h
->plt
.offset
== (bfd_vma
) -1
4237 && h
->got
.offset
== (bfd_vma
) -1)
4238 || htab
->elf
.sgotplt
== NULL
)
4241 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4242 + htab
->elf
.sgotplt
->output_offset
);
4244 /* It is relative to .got.plt section. */
4245 if (h
->got
.offset
!= (bfd_vma
) -1)
4246 /* Use GOT entry. Mask off the least significant bit in
4247 GOT offset which may be set by R_386_GOT32 processing
4249 relocation
= (htab
->elf
.sgot
->output_section
->vma
4250 + htab
->elf
.sgot
->output_offset
4251 + (h
->got
.offset
& ~1) - offplt
);
4253 /* Use GOTPLT entry. */
4254 relocation
= (h
->plt
.offset
/ plt_entry_size
- 1 + 3) * 4;
4256 if (!bfd_link_pic (info
))
4258 /* If not PIC, add the .got.plt section address for
4259 baseless addressing. */
4261 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4262 if ((modrm
& 0xc7) == 0x5)
4263 relocation
+= offplt
;
4266 unresolved_reloc
= FALSE
;
4271 /* Relocation is to the entry for this symbol in the global
4273 if (htab
->elf
.sgot
== NULL
)
4276 relative_reloc
= FALSE
;
4281 off
= h
->got
.offset
;
4282 dyn
= htab
->elf
.dynamic_sections_created
;
4283 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4284 bfd_link_pic (info
),
4286 || (bfd_link_pic (info
)
4287 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4288 || (ELF_ST_VISIBILITY (h
->other
)
4289 && h
->root
.type
== bfd_link_hash_undefweak
))
4291 /* This is actually a static link, or it is a
4292 -Bsymbolic link and the symbol is defined
4293 locally, or the symbol was forced to be local
4294 because of a version file. We must initialize
4295 this entry in the global offset table. Since the
4296 offset must always be a multiple of 4, we use the
4297 least significant bit to record whether we have
4298 initialized it already.
4300 When doing a dynamic link, we create a .rel.got
4301 relocation entry to initialize the value. This
4302 is done in the finish_dynamic_symbol routine. */
4307 bfd_put_32 (output_bfd
, relocation
,
4308 htab
->elf
.sgot
->contents
+ off
);
4311 if (h
->dynindx
== -1
4313 && h
->root
.type
!= bfd_link_hash_undefweak
4314 && bfd_link_pic (info
))
4316 /* PR ld/21402: If this symbol isn't dynamic
4317 in PIC, generate R_386_RELATIVE here. */
4318 eh
->no_finish_dynamic_symbol
= 1;
4319 relative_reloc
= TRUE
;
4324 unresolved_reloc
= FALSE
;
4328 if (local_got_offsets
== NULL
)
4331 off
= local_got_offsets
[r_symndx
];
4333 /* The offset must always be a multiple of 4. We use
4334 the least significant bit to record whether we have
4335 already generated the necessary reloc. */
4340 bfd_put_32 (output_bfd
, relocation
,
4341 htab
->elf
.sgot
->contents
+ off
);
4342 local_got_offsets
[r_symndx
] |= 1;
4344 if (bfd_link_pic (info
))
4345 relative_reloc
= TRUE
;
4352 Elf_Internal_Rela outrel
;
4354 s
= htab
->elf
.srelgot
;
4358 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4359 + htab
->elf
.sgot
->output_offset
4361 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4362 elf_append_rel (output_bfd
, s
, &outrel
);
4365 if (off
>= (bfd_vma
) -2)
4368 relocation
= (htab
->elf
.sgot
->output_section
->vma
4369 + htab
->elf
.sgot
->output_offset
+ off
);
4370 if (rel
->r_offset
> 1
4371 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4372 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4374 if (bfd_link_pic (info
))
4376 /* For PIC, disallow R_386_GOT32 without a base
4377 register, except for "lea foo@GOT, %reg", since
4378 we don't know what the GOT base is. */
4382 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
4383 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4386 name
= h
->root
.root
.string
;
4389 /* xgettext:c-format */
4390 (_("%B: direct GOT relocation %s against `%s'"
4391 " without base register can not be used"
4392 " when making a shared object"),
4393 input_bfd
, howto
->name
, name
);
4394 bfd_set_error (bfd_error_bad_value
);
4400 /* Subtract the .got.plt section address only with a base
4402 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
4403 + htab
->elf
.sgotplt
->output_offset
);
4409 /* Relocation is relative to the start of the global offset
4412 /* Check to make sure it isn't a protected function or data
4413 symbol for shared library since it may not be local when
4414 used as function address or with copy relocation. We also
4415 need to make sure that a symbol is referenced locally. */
4416 if (!bfd_link_executable (info
) && h
)
4418 if (!h
->def_regular
)
4422 switch (ELF_ST_VISIBILITY (h
->other
))
4425 v
= _("hidden symbol");
4428 v
= _("internal symbol");
4431 v
= _("protected symbol");
4439 /* xgettext:c-format */
4440 (_("%B: relocation R_386_GOTOFF against undefined %s"
4441 " `%s' can not be used when making a shared object"),
4442 input_bfd
, v
, h
->root
.root
.string
);
4443 bfd_set_error (bfd_error_bad_value
);
4446 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4447 && (h
->type
== STT_FUNC
4448 || h
->type
== STT_OBJECT
)
4449 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4452 /* xgettext:c-format */
4453 (_("%B: relocation R_386_GOTOFF against protected %s"
4454 " `%s' can not be used when making a shared object"),
4456 h
->type
== STT_FUNC
? "function" : "data",
4457 h
->root
.root
.string
);
4458 bfd_set_error (bfd_error_bad_value
);
4463 /* Note that sgot is not involved in this
4464 calculation. We always want the start of .got.plt. If we
4465 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4466 permitted by the ABI, we might have to change this
4468 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4469 + htab
->elf
.sgotplt
->output_offset
;
4473 /* Use global offset table as symbol value. */
4474 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4475 + htab
->elf
.sgotplt
->output_offset
;
4476 unresolved_reloc
= FALSE
;
4480 /* Relocation is to the entry for this symbol in the
4481 procedure linkage table. */
4483 /* Resolve a PLT32 reloc against a local symbol directly,
4484 without using the procedure linkage table. */
4488 if ((h
->plt
.offset
== (bfd_vma
) -1
4489 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4490 || htab
->elf
.splt
== NULL
)
4492 /* We didn't make a PLT entry for this symbol. This
4493 happens when statically linking PIC code, or when
4494 using -Bsymbolic. */
4498 if (h
->plt
.offset
!= (bfd_vma
) -1)
4500 resolved_plt
= htab
->elf
.splt
;
4501 plt_offset
= h
->plt
.offset
;
4505 resolved_plt
= htab
->plt_got
;
4506 plt_offset
= eh
->plt_got
.offset
;
4509 relocation
= (resolved_plt
->output_section
->vma
4510 + resolved_plt
->output_offset
4512 unresolved_reloc
= FALSE
;
4516 /* Set to symbol size. */
4517 relocation
= st_size
;
4522 if ((input_section
->flags
& SEC_ALLOC
) == 0
4526 /* Copy dynamic function pointer relocations. Don't generate
4527 dynamic relocations against resolved undefined weak symbols
4528 in PIE, except for R_386_PC32. */
4529 if ((bfd_link_pic (info
)
4531 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4532 && (!resolved_to_zero
4533 || r_type
== R_386_PC32
))
4534 || h
->root
.type
!= bfd_link_hash_undefweak
))
4535 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4536 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4537 || (ELIMINATE_COPY_RELOCS
4538 && !bfd_link_pic (info
)
4542 || eh
->func_pointer_refcount
> 0
4543 || (h
->root
.type
== bfd_link_hash_undefweak
4544 && !resolved_to_zero
))
4545 && ((h
->def_dynamic
&& !h
->def_regular
)
4546 /* Undefined weak symbol is bound locally when
4548 || h
->root
.type
== bfd_link_hash_undefweak
)))
4550 Elf_Internal_Rela outrel
;
4551 bfd_boolean skip
, relocate
;
4554 /* When generating a shared object, these relocations
4555 are copied into the output file to be resolved at run
4562 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4564 if (outrel
.r_offset
== (bfd_vma
) -1)
4566 else if (outrel
.r_offset
== (bfd_vma
) -2)
4567 skip
= TRUE
, relocate
= TRUE
;
4568 outrel
.r_offset
+= (input_section
->output_section
->vma
4569 + input_section
->output_offset
);
4572 memset (&outrel
, 0, sizeof outrel
);
4575 && (r_type
== R_386_PC32
4576 || !(bfd_link_executable (info
)
4577 || SYMBOLIC_BIND (info
, h
))
4578 || !h
->def_regular
))
4579 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4582 /* This symbol is local, or marked to become local. */
4584 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4587 sreloc
= elf_section_data (input_section
)->sreloc
;
4589 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4591 r
= bfd_reloc_notsupported
;
4592 goto check_relocation_error
;
4595 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4597 /* If this reloc is against an external symbol, we do
4598 not want to fiddle with the addend. Otherwise, we
4599 need to include the symbol value so that it becomes
4600 an addend for the dynamic reloc. */
4607 if (!bfd_link_executable (info
))
4609 Elf_Internal_Rela outrel
;
4612 outrel
.r_offset
= rel
->r_offset
4613 + input_section
->output_section
->vma
4614 + input_section
->output_offset
;
4615 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4616 sreloc
= elf_section_data (input_section
)->sreloc
;
4619 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4624 case R_386_TLS_GOTDESC
:
4625 case R_386_TLS_DESC_CALL
:
4626 case R_386_TLS_IE_32
:
4627 case R_386_TLS_GOTIE
:
4628 tls_type
= GOT_UNKNOWN
;
4629 if (h
== NULL
&& local_got_offsets
)
4630 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4632 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4633 if (tls_type
== GOT_TLS_IE
)
4634 tls_type
= GOT_TLS_IE_NEG
;
4636 if (! elf_i386_tls_transition (info
, input_bfd
,
4637 input_section
, contents
,
4638 symtab_hdr
, sym_hashes
,
4639 &r_type
, tls_type
, rel
,
4640 relend
, h
, r_symndx
, TRUE
))
4643 if (r_type
== R_386_TLS_LE_32
)
4645 BFD_ASSERT (! unresolved_reloc
);
4646 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4651 /* GD->LE transition. */
4652 type
= *(contents
+ rel
->r_offset
- 2);
4656 leal foo@tlsgd(,%ebx,1), %eax
4657 call ___tls_get_addr@PLT
4660 subl $foo@tpoff, %eax
4661 (6 byte form of subl). */
4662 roff
= rel
->r_offset
+ 5;
4667 leal foo@tlsgd(%ebx), %eax
4668 call ___tls_get_addr@PLT
4671 leal foo@tlsgd(%reg), %eax
4672 call *___tls_get_addr@GOT(%reg)
4673 which may be converted to
4674 addr32 call ___tls_get_addr
4676 movl %gs:0, %eax; subl $foo@tpoff, %eax
4677 (6 byte form of subl). */
4678 roff
= rel
->r_offset
+ 6;
4680 memcpy (contents
+ roff
- 8,
4681 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4682 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4684 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4689 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4691 /* GDesc -> LE transition.
4692 It's originally something like:
4693 leal x@tlsdesc(%ebx), %eax
4697 Registers other than %eax may be set up here. */
4702 roff
= rel
->r_offset
;
4703 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4705 /* Now modify the instruction as appropriate. */
4706 /* aoliva FIXME: remove the above and xor the byte
4708 bfd_put_8 (output_bfd
, val
^ 0x86,
4709 contents
+ roff
- 1);
4710 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4714 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4716 /* GDesc -> LE transition.
4724 roff
= rel
->r_offset
;
4725 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4726 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4729 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4733 /* IE->LE transition:
4734 Originally it can be one of:
4742 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4745 /* movl foo, %eax. */
4746 bfd_put_8 (output_bfd
, 0xb8,
4747 contents
+ rel
->r_offset
- 1);
4753 type
= bfd_get_8 (input_bfd
,
4754 contents
+ rel
->r_offset
- 2);
4759 bfd_put_8 (output_bfd
, 0xc7,
4760 contents
+ rel
->r_offset
- 2);
4761 bfd_put_8 (output_bfd
,
4762 0xc0 | ((val
>> 3) & 7),
4763 contents
+ rel
->r_offset
- 1);
4767 bfd_put_8 (output_bfd
, 0x81,
4768 contents
+ rel
->r_offset
- 2);
4769 bfd_put_8 (output_bfd
,
4770 0xc0 | ((val
>> 3) & 7),
4771 contents
+ rel
->r_offset
- 1);
4778 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4779 contents
+ rel
->r_offset
);
4784 unsigned int val
, type
;
4786 /* {IE_32,GOTIE}->LE transition:
4787 Originally it can be one of:
4788 subl foo(%reg1), %reg2
4789 movl foo(%reg1), %reg2
4790 addl foo(%reg1), %reg2
4793 movl $foo, %reg2 (6 byte form)
4794 addl $foo, %reg2. */
4795 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4796 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4800 bfd_put_8 (output_bfd
, 0xc7,
4801 contents
+ rel
->r_offset
- 2);
4802 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4803 contents
+ rel
->r_offset
- 1);
4805 else if (type
== 0x2b)
4808 bfd_put_8 (output_bfd
, 0x81,
4809 contents
+ rel
->r_offset
- 2);
4810 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4811 contents
+ rel
->r_offset
- 1);
4813 else if (type
== 0x03)
4816 bfd_put_8 (output_bfd
, 0x81,
4817 contents
+ rel
->r_offset
- 2);
4818 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4819 contents
+ rel
->r_offset
- 1);
4823 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4824 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4825 contents
+ rel
->r_offset
);
4827 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4828 contents
+ rel
->r_offset
);
4833 if (htab
->elf
.sgot
== NULL
)
4838 off
= h
->got
.offset
;
4839 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4843 if (local_got_offsets
== NULL
)
4846 off
= local_got_offsets
[r_symndx
];
4847 offplt
= local_tlsdesc_gotents
[r_symndx
];
4854 Elf_Internal_Rela outrel
;
4858 if (htab
->elf
.srelgot
== NULL
)
4861 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4863 if (GOT_TLS_GDESC_P (tls_type
))
4866 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4867 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4868 <= htab
->elf
.sgotplt
->size
);
4869 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4870 + htab
->elf
.sgotplt
->output_offset
4872 + htab
->sgotplt_jump_table_size
);
4873 sreloc
= htab
->elf
.srelplt
;
4874 loc
= sreloc
->contents
;
4875 loc
+= (htab
->next_tls_desc_index
++
4876 * sizeof (Elf32_External_Rel
));
4877 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4878 <= sreloc
->contents
+ sreloc
->size
);
4879 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4882 BFD_ASSERT (! unresolved_reloc
);
4883 bfd_put_32 (output_bfd
,
4884 relocation
- elf_i386_dtpoff_base (info
),
4885 htab
->elf
.sgotplt
->contents
+ offplt
4886 + htab
->sgotplt_jump_table_size
+ 4);
4890 bfd_put_32 (output_bfd
, 0,
4891 htab
->elf
.sgotplt
->contents
+ offplt
4892 + htab
->sgotplt_jump_table_size
+ 4);
4896 sreloc
= htab
->elf
.srelgot
;
4898 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4899 + htab
->elf
.sgot
->output_offset
+ off
);
4901 if (GOT_TLS_GD_P (tls_type
))
4902 dr_type
= R_386_TLS_DTPMOD32
;
4903 else if (GOT_TLS_GDESC_P (tls_type
))
4905 else if (tls_type
== GOT_TLS_IE_POS
)
4906 dr_type
= R_386_TLS_TPOFF
;
4908 dr_type
= R_386_TLS_TPOFF32
;
4910 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4911 bfd_put_32 (output_bfd
,
4912 relocation
- elf_i386_dtpoff_base (info
),
4913 htab
->elf
.sgot
->contents
+ off
);
4914 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4915 bfd_put_32 (output_bfd
,
4916 elf_i386_dtpoff_base (info
) - relocation
,
4917 htab
->elf
.sgot
->contents
+ off
);
4918 else if (dr_type
!= R_386_TLS_DESC
)
4919 bfd_put_32 (output_bfd
, 0,
4920 htab
->elf
.sgot
->contents
+ off
);
4921 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4923 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4925 if (GOT_TLS_GD_P (tls_type
))
4929 BFD_ASSERT (! unresolved_reloc
);
4930 bfd_put_32 (output_bfd
,
4931 relocation
- elf_i386_dtpoff_base (info
),
4932 htab
->elf
.sgot
->contents
+ off
+ 4);
4936 bfd_put_32 (output_bfd
, 0,
4937 htab
->elf
.sgot
->contents
+ off
+ 4);
4938 outrel
.r_info
= ELF32_R_INFO (indx
,
4939 R_386_TLS_DTPOFF32
);
4940 outrel
.r_offset
+= 4;
4941 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4944 else if (tls_type
== GOT_TLS_IE_BOTH
)
4946 bfd_put_32 (output_bfd
,
4948 ? relocation
- elf_i386_dtpoff_base (info
)
4950 htab
->elf
.sgot
->contents
+ off
+ 4);
4951 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4952 outrel
.r_offset
+= 4;
4953 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4960 local_got_offsets
[r_symndx
] |= 1;
4963 if (off
>= (bfd_vma
) -2
4964 && ! GOT_TLS_GDESC_P (tls_type
))
4966 if (r_type
== R_386_TLS_GOTDESC
4967 || r_type
== R_386_TLS_DESC_CALL
)
4969 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4970 unresolved_reloc
= FALSE
;
4972 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4974 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4975 + htab
->elf
.sgotplt
->output_offset
;
4976 relocation
= htab
->elf
.sgot
->output_section
->vma
4977 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4978 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4979 && tls_type
== GOT_TLS_IE_BOTH
)
4981 if (r_type
== R_386_TLS_IE
)
4982 relocation
+= g_o_t
;
4983 unresolved_reloc
= FALSE
;
4985 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4987 unsigned int val
, type
;
4990 /* GD->IE transition. */
4991 type
= *(contents
+ rel
->r_offset
- 2);
4992 val
= *(contents
+ rel
->r_offset
- 1);
4996 leal foo@tlsgd(,%ebx,1), %eax
4997 call ___tls_get_addr@PLT
5000 subl $foo@gottpoff(%ebx), %eax. */
5002 roff
= rel
->r_offset
- 3;
5007 leal foo@tlsgd(%ebx), %eax
5008 call ___tls_get_addr@PLT
5011 leal foo@tlsgd(%reg), %eax
5012 call *___tls_get_addr@GOT(%reg)
5013 which may be converted to
5014 addr32 call ___tls_get_addr
5017 subl $foo@gottpoff(%reg), %eax. */
5018 roff
= rel
->r_offset
- 2;
5020 memcpy (contents
+ roff
,
5021 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
5022 contents
[roff
+ 7] = 0x80 | (val
& 7);
5023 /* If foo is used only with foo@gotntpoff(%reg) and
5024 foo@indntpoff, but not with foo@gottpoff(%reg), change
5025 subl $foo@gottpoff(%reg), %eax
5027 addl $foo@gotntpoff(%reg), %eax. */
5028 if (tls_type
== GOT_TLS_IE_POS
)
5029 contents
[roff
+ 6] = 0x03;
5030 bfd_put_32 (output_bfd
,
5031 htab
->elf
.sgot
->output_section
->vma
5032 + htab
->elf
.sgot
->output_offset
+ off
5033 - htab
->elf
.sgotplt
->output_section
->vma
5034 - htab
->elf
.sgotplt
->output_offset
,
5035 contents
+ roff
+ 8);
5036 /* Skip R_386_PLT32 and R_386_GOT32X. */
5041 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
5043 /* GDesc -> IE transition.
5044 It's originally something like:
5045 leal x@tlsdesc(%ebx), %eax
5048 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5050 movl x@gottpoff(%ebx), %eax # before negl %eax
5052 Registers other than %eax may be set up here. */
5056 /* First, make sure it's a leal adding ebx to a 32-bit
5057 offset into any register, although it's probably
5058 almost always going to be eax. */
5059 roff
= rel
->r_offset
;
5061 /* Now modify the instruction as appropriate. */
5062 /* To turn a leal into a movl in the form we use it, it
5063 suffices to change the first byte from 0x8d to 0x8b.
5064 aoliva FIXME: should we decide to keep the leal, all
5065 we have to do is remove the statement below, and
5066 adjust the relaxation of R_386_TLS_DESC_CALL. */
5067 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
5069 if (tls_type
== GOT_TLS_IE_BOTH
)
5072 bfd_put_32 (output_bfd
,
5073 htab
->elf
.sgot
->output_section
->vma
5074 + htab
->elf
.sgot
->output_offset
+ off
5075 - htab
->elf
.sgotplt
->output_section
->vma
5076 - htab
->elf
.sgotplt
->output_offset
,
5080 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
5082 /* GDesc -> IE transition.
5090 depending on how we transformed the TLS_GOTDESC above.
5095 roff
= rel
->r_offset
;
5097 /* Now modify the instruction as appropriate. */
5098 if (tls_type
!= GOT_TLS_IE_NEG
)
5101 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5102 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5107 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
5108 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
5118 if (! elf_i386_tls_transition (info
, input_bfd
,
5119 input_section
, contents
,
5120 symtab_hdr
, sym_hashes
,
5121 &r_type
, GOT_UNKNOWN
, rel
,
5122 relend
, h
, r_symndx
, TRUE
))
5125 if (r_type
!= R_386_TLS_LDM
)
5127 /* LD->LE transition. Change
5128 leal foo@tlsldm(%ebx) %eax
5129 call ___tls_get_addr@PLT
5133 leal 0(%esi,1), %esi
5135 leal foo@tlsldm(%reg) %eax
5136 call *___tls_get_addr@GOT(%reg)
5137 which may be converted to
5138 addr32 call ___tls_get_addr
5141 leal 0(%esi), %esi */
5142 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
5143 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
5144 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
5145 memcpy (contents
+ rel
->r_offset
- 2,
5146 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5148 memcpy (contents
+ rel
->r_offset
- 2,
5149 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5150 /* Skip R_386_PC32/R_386_PLT32. */
5156 if (htab
->elf
.sgot
== NULL
)
5159 off
= htab
->tls_ldm_got
.offset
;
5164 Elf_Internal_Rela outrel
;
5166 if (htab
->elf
.srelgot
== NULL
)
5169 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5170 + htab
->elf
.sgot
->output_offset
+ off
);
5172 bfd_put_32 (output_bfd
, 0,
5173 htab
->elf
.sgot
->contents
+ off
);
5174 bfd_put_32 (output_bfd
, 0,
5175 htab
->elf
.sgot
->contents
+ off
+ 4);
5176 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5177 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5178 htab
->tls_ldm_got
.offset
|= 1;
5180 relocation
= htab
->elf
.sgot
->output_section
->vma
5181 + htab
->elf
.sgot
->output_offset
+ off
5182 - htab
->elf
.sgotplt
->output_section
->vma
5183 - htab
->elf
.sgotplt
->output_offset
;
5184 unresolved_reloc
= FALSE
;
5187 case R_386_TLS_LDO_32
:
5188 if (!bfd_link_executable (info
)
5189 || (input_section
->flags
& SEC_CODE
) == 0)
5190 relocation
-= elf_i386_dtpoff_base (info
);
5192 /* When converting LDO to LE, we must negate. */
5193 relocation
= -elf_i386_tpoff (info
, relocation
);
5196 case R_386_TLS_LE_32
:
5198 if (!bfd_link_executable (info
))
5200 Elf_Internal_Rela outrel
;
5203 outrel
.r_offset
= rel
->r_offset
5204 + input_section
->output_section
->vma
5205 + input_section
->output_offset
;
5206 if (h
!= NULL
&& h
->dynindx
!= -1)
5210 if (r_type
== R_386_TLS_LE_32
)
5211 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5213 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5214 sreloc
= elf_section_data (input_section
)->sreloc
;
5217 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5220 else if (r_type
== R_386_TLS_LE_32
)
5221 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5223 relocation
-= elf_i386_dtpoff_base (info
);
5225 else if (r_type
== R_386_TLS_LE_32
)
5226 relocation
= elf_i386_tpoff (info
, relocation
);
5228 relocation
= -elf_i386_tpoff (info
, relocation
);
5235 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5236 because such sections are not SEC_ALLOC and thus ld.so will
5237 not process them. */
5238 if (unresolved_reloc
5239 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5241 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5242 rel
->r_offset
) != (bfd_vma
) -1)
5245 /* xgettext:c-format */
5246 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5249 (long) rel
->r_offset
,
5251 h
->root
.root
.string
);
5256 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5257 contents
, rel
->r_offset
,
5260 check_relocation_error
:
5261 if (r
!= bfd_reloc_ok
)
5266 name
= h
->root
.root
.string
;
5269 name
= bfd_elf_string_from_elf_section (input_bfd
,
5270 symtab_hdr
->sh_link
,
5275 name
= bfd_section_name (input_bfd
, sec
);
5278 if (r
== bfd_reloc_overflow
)
5279 (*info
->callbacks
->reloc_overflow
)
5280 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5281 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5285 /* xgettext:c-format */
5286 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5287 input_bfd
, input_section
,
5288 (long) rel
->r_offset
, name
, (int) r
);
5299 Elf_Internal_Shdr
*rel_hdr
;
5300 size_t deleted
= rel
- wrel
;
5302 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5303 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5304 if (rel_hdr
->sh_size
== 0)
5306 /* It is too late to remove an empty reloc section. Leave
5308 ??? What is wrong with an empty section??? */
5309 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5312 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5313 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5314 input_section
->reloc_count
-= deleted
;
5320 /* Finish up dynamic symbol handling. We set the contents of various
5321 dynamic sections here. */
5324 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5325 struct bfd_link_info
*info
,
5326 struct elf_link_hash_entry
*h
,
5327 Elf_Internal_Sym
*sym
)
5329 struct elf_i386_link_hash_table
*htab
;
5330 unsigned plt_entry_size
;
5331 const struct elf_i386_backend_data
*abed
;
5332 struct elf_i386_link_hash_entry
*eh
;
5333 bfd_boolean local_undefweak
;
5335 htab
= elf_i386_hash_table (info
);
5339 abed
= get_elf_i386_backend_data (output_bfd
);
5340 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
5342 eh
= (struct elf_i386_link_hash_entry
*) h
;
5343 if (eh
->no_finish_dynamic_symbol
)
5346 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5347 resolved undefined weak symbols in executable so that their
5348 references have value 0 at run-time. */
5349 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5353 if (h
->plt
.offset
!= (bfd_vma
) -1)
5357 Elf_Internal_Rela rel
;
5359 asection
*plt
, *gotplt
, *relplt
;
5361 /* When building a static executable, use .iplt, .igot.plt and
5362 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5363 if (htab
->elf
.splt
!= NULL
)
5365 plt
= htab
->elf
.splt
;
5366 gotplt
= htab
->elf
.sgotplt
;
5367 relplt
= htab
->elf
.srelplt
;
5371 plt
= htab
->elf
.iplt
;
5372 gotplt
= htab
->elf
.igotplt
;
5373 relplt
= htab
->elf
.irelplt
;
5376 /* This symbol has an entry in the procedure linkage table. Set
5379 if ((h
->dynindx
== -1
5381 && !((h
->forced_local
|| bfd_link_executable (info
))
5383 && h
->type
== STT_GNU_IFUNC
))
5389 /* Get the index in the procedure linkage table which
5390 corresponds to this symbol. This is the index of this symbol
5391 in all the symbols for which we are making plt entries. The
5392 first entry in the procedure linkage table is reserved.
5394 Get the offset into the .got table of the entry that
5395 corresponds to this function. Each .got entry is 4 bytes.
5396 The first three are reserved.
5398 For static executables, we don't reserve anything. */
5400 if (plt
== htab
->elf
.splt
)
5402 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
5403 got_offset
= (got_offset
+ 3) * 4;
5407 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5408 got_offset
= got_offset
* 4;
5411 /* Fill in the entry in the procedure linkage table. */
5412 if (! bfd_link_pic (info
))
5414 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
5415 abed
->plt
->plt_entry_size
);
5416 bfd_put_32 (output_bfd
,
5417 (gotplt
->output_section
->vma
5418 + gotplt
->output_offset
5420 plt
->contents
+ h
->plt
.offset
5421 + abed
->plt
->plt_got_offset
);
5423 if (abed
->is_vxworks
)
5425 int s
, k
, reloc_index
;
5427 /* Create the R_386_32 relocation referencing the GOT
5428 for this PLT entry. */
5430 /* S: Current slot number (zero-based). */
5431 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
5432 / abed
->plt
->plt_entry_size
);
5433 /* K: Number of relocations for PLTResolve. */
5434 if (bfd_link_pic (info
))
5435 k
= PLTRESOLVE_RELOCS_SHLIB
;
5437 k
= PLTRESOLVE_RELOCS
;
5438 /* Skip the PLTresolve relocations, and the relocations for
5439 the other PLT slots. */
5440 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5441 loc
= (htab
->srelplt2
->contents
+ reloc_index
5442 * sizeof (Elf32_External_Rel
));
5444 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5445 + htab
->elf
.splt
->output_offset
5446 + h
->plt
.offset
+ 2),
5447 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5448 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5450 /* Create the R_386_32 relocation referencing the beginning of
5451 the PLT for this GOT entry. */
5452 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5453 + htab
->elf
.sgotplt
->output_offset
5455 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5456 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5457 loc
+ sizeof (Elf32_External_Rel
));
5462 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
5463 abed
->plt
->plt_entry_size
);
5464 bfd_put_32 (output_bfd
, got_offset
,
5465 plt
->contents
+ h
->plt
.offset
5466 + abed
->plt
->plt_got_offset
);
5469 /* Fill in the entry in the global offset table. Leave the entry
5470 as zero for undefined weak symbol in PIE. No PLT relocation
5471 against undefined weak symbol in PIE. */
5472 if (!local_undefweak
)
5474 bfd_put_32 (output_bfd
,
5475 (plt
->output_section
->vma
5476 + plt
->output_offset
5478 + abed
->plt
->plt_lazy_offset
),
5479 gotplt
->contents
+ got_offset
);
5481 /* Fill in the entry in the .rel.plt section. */
5482 rel
.r_offset
= (gotplt
->output_section
->vma
5483 + gotplt
->output_offset
5485 if (h
->dynindx
== -1
5486 || ((bfd_link_executable (info
)
5487 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5489 && h
->type
== STT_GNU_IFUNC
))
5491 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5492 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5493 in the .got.plt section. */
5494 bfd_put_32 (output_bfd
,
5495 (h
->root
.u
.def
.value
5496 + h
->root
.u
.def
.section
->output_section
->vma
5497 + h
->root
.u
.def
.section
->output_offset
),
5498 gotplt
->contents
+ got_offset
);
5499 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5500 /* R_386_IRELATIVE comes last. */
5501 plt_index
= htab
->next_irelative_index
--;
5505 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5506 plt_index
= htab
->next_jump_slot_index
++;
5509 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5510 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5512 /* Don't fill PLT entry for static executables. */
5513 if (plt
== htab
->elf
.splt
)
5515 bfd_put_32 (output_bfd
,
5516 plt_index
* sizeof (Elf32_External_Rel
),
5517 plt
->contents
+ h
->plt
.offset
5518 + abed
->plt
->plt_reloc_offset
);
5519 bfd_put_32 (output_bfd
, - (h
->plt
.offset
5520 + abed
->plt
->plt_plt_offset
+ 4),
5521 plt
->contents
+ h
->plt
.offset
5522 + abed
->plt
->plt_plt_offset
);
5526 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5528 bfd_vma got_offset
, plt_offset
;
5529 asection
*plt
, *got
, *gotplt
;
5530 const bfd_byte
*got_plt_entry
;
5532 /* Offset of displacement of the indirect jump. */
5533 bfd_vma plt_got_offset
= 2;
5535 /* Set the entry in the GOT procedure linkage table. */
5536 plt
= htab
->plt_got
;
5537 got
= htab
->elf
.sgot
;
5538 gotplt
= htab
->elf
.sgotplt
;
5539 got_offset
= h
->got
.offset
;
5541 if (got_offset
== (bfd_vma
) -1
5547 /* Fill in the entry in the GOT procedure linkage table. */
5548 if (! bfd_link_pic (info
))
5550 got_plt_entry
= elf_i386_got_plt_entry
;
5551 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5555 got_plt_entry
= elf_i386_pic_got_plt_entry
;
5556 got_offset
+= (got
->output_section
->vma
5557 + got
->output_offset
5558 - gotplt
->output_section
->vma
5559 - gotplt
->output_offset
);
5562 plt_offset
= eh
->plt_got
.offset
;
5563 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5564 sizeof (elf_i386_got_plt_entry
));
5565 bfd_put_32 (output_bfd
, got_offset
,
5566 plt
->contents
+ plt_offset
+ plt_got_offset
);
5569 if (!local_undefweak
5571 && (h
->plt
.offset
!= (bfd_vma
) -1
5572 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5574 /* Mark the symbol as undefined, rather than as defined in
5575 the .plt section. Leave the value if there were any
5576 relocations where pointer equality matters (this is a clue
5577 for the dynamic linker, to make function pointer
5578 comparisons work between an application and shared
5579 library), otherwise set it to zero. If a function is only
5580 called from a binary, there is no need to slow down
5581 shared libraries because of that. */
5582 sym
->st_shndx
= SHN_UNDEF
;
5583 if (!h
->pointer_equality_needed
)
5587 /* Don't generate dynamic GOT relocation against undefined weak
5588 symbol in executable. */
5589 if (h
->got
.offset
!= (bfd_vma
) -1
5590 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5591 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5592 && !local_undefweak
)
5594 Elf_Internal_Rela rel
;
5595 asection
*relgot
= htab
->elf
.srelgot
;
5597 /* This symbol has an entry in the global offset table. Set it
5600 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5603 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5604 + htab
->elf
.sgot
->output_offset
5605 + (h
->got
.offset
& ~(bfd_vma
) 1));
5607 /* If this is a static link, or it is a -Bsymbolic link and the
5608 symbol is defined locally or was forced to be local because
5609 of a version file, we just want to emit a RELATIVE reloc.
5610 The entry in the global offset table will already have been
5611 initialized in the relocate_section function. */
5613 && h
->type
== STT_GNU_IFUNC
)
5615 if (h
->plt
.offset
== (bfd_vma
) -1)
5617 /* STT_GNU_IFUNC is referenced without PLT. */
5618 if (htab
->elf
.splt
== NULL
)
5620 /* use .rel[a].iplt section to store .got relocations
5621 in static executable. */
5622 relgot
= htab
->elf
.irelplt
;
5624 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5626 bfd_put_32 (output_bfd
,
5627 (h
->root
.u
.def
.value
5628 + h
->root
.u
.def
.section
->output_section
->vma
5629 + h
->root
.u
.def
.section
->output_offset
),
5630 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5631 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5636 else if (bfd_link_pic (info
))
5638 /* Generate R_386_GLOB_DAT. */
5645 if (!h
->pointer_equality_needed
)
5648 /* For non-shared object, we can't use .got.plt, which
5649 contains the real function addres if we need pointer
5650 equality. We load the GOT entry with the PLT entry. */
5651 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5652 bfd_put_32 (output_bfd
,
5653 (plt
->output_section
->vma
5654 + plt
->output_offset
+ h
->plt
.offset
),
5655 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5659 else if (bfd_link_pic (info
)
5660 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5662 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5663 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5667 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5669 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5670 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5671 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5674 elf_append_rel (output_bfd
, relgot
, &rel
);
5679 Elf_Internal_Rela rel
;
5682 /* This symbol needs a copy reloc. Set it up. */
5684 if (h
->dynindx
== -1
5685 || (h
->root
.type
!= bfd_link_hash_defined
5686 && h
->root
.type
!= bfd_link_hash_defweak
)
5687 || htab
->elf
.srelbss
== NULL
5688 || htab
->elf
.sreldynrelro
== NULL
)
5691 rel
.r_offset
= (h
->root
.u
.def
.value
5692 + h
->root
.u
.def
.section
->output_section
->vma
5693 + h
->root
.u
.def
.section
->output_offset
);
5694 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5695 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5696 s
= htab
->elf
.sreldynrelro
;
5698 s
= htab
->elf
.srelbss
;
5699 elf_append_rel (output_bfd
, s
, &rel
);
5705 /* Finish up local dynamic symbol handling. We set the contents of
5706 various dynamic sections here. */
5709 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5711 struct elf_link_hash_entry
*h
5712 = (struct elf_link_hash_entry
*) *slot
;
5713 struct bfd_link_info
*info
5714 = (struct bfd_link_info
*) inf
;
5716 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5720 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5721 here since undefined weak symbol may not be dynamic and may not be
5722 called for elf_i386_finish_dynamic_symbol. */
5725 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5728 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5729 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5731 if (h
->root
.type
!= bfd_link_hash_undefweak
5732 || h
->dynindx
!= -1)
5735 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5739 /* Used to decide how to sort relocs in an optimal manner for the
5740 dynamic linker, before writing them out. */
5742 static enum elf_reloc_type_class
5743 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5744 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5745 const Elf_Internal_Rela
*rela
)
5747 bfd
*abfd
= info
->output_bfd
;
5748 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5749 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5751 if (htab
->dynsym
!= NULL
5752 && htab
->dynsym
->contents
!= NULL
)
5754 /* Check relocation against STT_GNU_IFUNC symbol if there are
5756 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5757 if (r_symndx
!= STN_UNDEF
)
5759 Elf_Internal_Sym sym
;
5760 if (!bed
->s
->swap_symbol_in (abfd
,
5761 (htab
->dynsym
->contents
5762 + r_symndx
* sizeof (Elf32_External_Sym
)),
5766 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5767 return reloc_class_ifunc
;
5771 switch (ELF32_R_TYPE (rela
->r_info
))
5773 case R_386_IRELATIVE
:
5774 return reloc_class_ifunc
;
5775 case R_386_RELATIVE
:
5776 return reloc_class_relative
;
5777 case R_386_JUMP_SLOT
:
5778 return reloc_class_plt
;
5780 return reloc_class_copy
;
5782 return reloc_class_normal
;
5786 /* Finish up the dynamic sections. */
5789 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5790 struct bfd_link_info
*info
)
5792 struct elf_i386_link_hash_table
*htab
;
5795 const struct elf_i386_backend_data
*abed
;
5797 htab
= elf_i386_hash_table (info
);
5801 dynobj
= htab
->elf
.dynobj
;
5802 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5803 abed
= get_elf_i386_backend_data (output_bfd
);
5805 if (htab
->elf
.dynamic_sections_created
)
5807 Elf32_External_Dyn
*dyncon
, *dynconend
;
5809 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5812 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5813 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5814 for (; dyncon
< dynconend
; dyncon
++)
5816 Elf_Internal_Dyn dyn
;
5819 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5824 if (abed
->is_vxworks
5825 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5830 s
= htab
->elf
.sgotplt
;
5831 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5835 s
= htab
->elf
.srelplt
;
5836 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5840 s
= htab
->elf
.srelplt
;
5841 dyn
.d_un
.d_val
= s
->size
;
5845 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5848 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5850 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5851 really seem like the right value. */
5852 elf_section_data (htab
->elf
.splt
->output_section
)
5853 ->this_hdr
.sh_entsize
= 4;
5855 /* Fill in the special first entry in the procedure linkage
5857 if (bfd_link_pic (info
))
5859 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5860 abed
->plt
->plt0_entry_size
);
5861 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5862 abed
->plt0_pad_byte
,
5863 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5867 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5868 abed
->plt
->plt0_entry_size
);
5869 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5870 abed
->plt0_pad_byte
,
5871 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5872 bfd_put_32 (output_bfd
,
5873 (htab
->elf
.sgotplt
->output_section
->vma
5874 + htab
->elf
.sgotplt
->output_offset
5876 htab
->elf
.splt
->contents
5877 + abed
->plt
->plt0_got1_offset
);
5878 bfd_put_32 (output_bfd
,
5879 (htab
->elf
.sgotplt
->output_section
->vma
5880 + htab
->elf
.sgotplt
->output_offset
5882 htab
->elf
.splt
->contents
5883 + abed
->plt
->plt0_got2_offset
);
5885 if (abed
->is_vxworks
)
5887 Elf_Internal_Rela rel
;
5888 int num_plts
= (htab
->elf
.splt
->size
5889 / abed
->plt
->plt_entry_size
) - 1;
5892 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5893 On IA32 we use REL relocations so the addend goes in
5894 the PLT directly. */
5895 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5896 + htab
->elf
.splt
->output_offset
5897 + abed
->plt
->plt0_got1_offset
);
5898 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5899 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5900 htab
->srelplt2
->contents
);
5901 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5902 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5903 + htab
->elf
.splt
->output_offset
5904 + abed
->plt
->plt0_got2_offset
);
5905 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5906 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5907 htab
->srelplt2
->contents
+
5908 sizeof (Elf32_External_Rel
));
5910 /* Correct the .rel.plt.unloaded relocations. */
5911 p
= htab
->srelplt2
->contents
;
5912 if (bfd_link_pic (info
))
5913 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5915 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5917 for (; num_plts
; num_plts
--)
5919 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5920 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
5922 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5923 p
+= sizeof (Elf32_External_Rel
);
5925 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5926 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
5928 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5929 p
+= sizeof (Elf32_External_Rel
);
5936 if (htab
->elf
.sgotplt
)
5938 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5941 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5945 /* Fill in the first three entries in the global offset table. */
5946 if (htab
->elf
.sgotplt
->size
> 0)
5948 bfd_put_32 (output_bfd
,
5950 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5951 htab
->elf
.sgotplt
->contents
);
5952 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5953 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5956 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5959 /* Adjust .eh_frame for .plt section. */
5960 if (htab
->plt_eh_frame
!= NULL
5961 && htab
->plt_eh_frame
->contents
!= NULL
)
5963 if (htab
->elf
.splt
!= NULL
5964 && htab
->elf
.splt
->size
!= 0
5965 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5966 && htab
->elf
.splt
->output_section
!= NULL
5967 && htab
->plt_eh_frame
->output_section
!= NULL
)
5969 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5970 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5971 + htab
->plt_eh_frame
->output_offset
5972 + PLT_FDE_START_OFFSET
;
5973 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5974 htab
->plt_eh_frame
->contents
5975 + PLT_FDE_START_OFFSET
);
5977 if (htab
->plt_eh_frame
->sec_info_type
5978 == SEC_INFO_TYPE_EH_FRAME
)
5980 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5982 htab
->plt_eh_frame
->contents
))
5987 /* Adjust .eh_frame for .plt.got section. */
5988 if (htab
->plt_got_eh_frame
!= NULL
5989 && htab
->plt_got_eh_frame
->contents
!= NULL
)
5991 if (htab
->plt_got
!= NULL
5992 && htab
->plt_got
->size
!= 0
5993 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
5994 && htab
->plt_got
->output_section
!= NULL
5995 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
5997 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
5998 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
5999 + htab
->plt_got_eh_frame
->output_offset
6000 + PLT_FDE_START_OFFSET
;
6001 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6002 htab
->plt_got_eh_frame
->contents
6003 + PLT_FDE_START_OFFSET
);
6005 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
6007 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6008 htab
->plt_got_eh_frame
,
6009 htab
->plt_got_eh_frame
->contents
))
6014 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
6015 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
6017 /* Fill PLT entries for undefined weak symbols in PIE. */
6018 if (bfd_link_pie (info
))
6019 bfd_hash_traverse (&info
->hash
->table
,
6020 elf_i386_pie_finish_undefweak_symbol
,
6026 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6027 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6028 It has to be done before elf_link_sort_relocs is called so that
6029 dynamic relocations are properly sorted. */
6032 elf_i386_output_arch_local_syms
6033 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
6034 struct bfd_link_info
*info
,
6035 void *flaginfo ATTRIBUTE_UNUSED
,
6036 int (*func
) (void *, const char *,
6039 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
6041 struct elf_i386_link_hash_table
*htab
= elf_i386_hash_table (info
);
6045 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6046 htab_traverse (htab
->loc_hash_table
,
6047 elf_i386_finish_local_dynamic_symbol
,
6053 /* Return an array of PLT entry symbol values. */
6056 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
6059 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6062 bfd_vma
*plt_sym_val
;
6064 bfd_byte
*plt_contents
;
6065 const struct elf_i386_backend_data
*bed
6066 = get_elf_i386_backend_data (abfd
);
6067 Elf_Internal_Shdr
*hdr
;
6069 /* Get the .plt section contents. */
6070 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6071 if (plt_contents
== NULL
)
6073 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6074 plt_contents
, 0, plt
->size
))
6077 free (plt_contents
);
6081 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6082 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
6085 hdr
= &elf_section_data (relplt
)->this_hdr
;
6086 count
= relplt
->size
/ hdr
->sh_entsize
;
6088 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
6089 if (plt_sym_val
== NULL
)
6092 for (i
= 0; i
< count
; i
++)
6093 plt_sym_val
[i
] = -1;
6095 plt_offset
= bed
->plt
->plt_entry_size
;
6096 p
= relplt
->relocation
;
6097 for (i
= 0; i
< count
; i
++, p
++)
6101 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6102 if (p
->howto
== NULL
)
6105 if (p
->howto
->type
!= R_386_JUMP_SLOT
6106 && p
->howto
->type
!= R_386_IRELATIVE
)
6109 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
6110 + bed
->plt
->plt_reloc_offset
));
6111 reloc_index
/= sizeof (Elf32_External_Rel
);
6112 if (reloc_index
< count
)
6113 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
6115 plt_offset
+= bed
->plt
->plt_entry_size
;
6117 /* PR binutils/18437: Skip extra relocations in the .rel.plt
6119 if (plt_offset
>= plt
->size
)
6123 free (plt_contents
);
6128 /* Similar to _bfd_elf_get_synthetic_symtab. */
6131 elf_i386_get_synthetic_symtab (bfd
*abfd
,
6138 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
6139 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
6140 dynsymcount
, dynsyms
, ret
,
6142 elf_i386_get_plt_sym_val
);
6145 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6148 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
6150 if (h
->plt
.offset
!= (bfd_vma
) -1
6152 && !h
->pointer_equality_needed
)
6155 return _bfd_elf_hash_symbol (h
);
6158 /* Parse i386 GNU properties. */
6160 static enum elf_property_kind
6161 elf_i386_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
6162 bfd_byte
*ptr
, unsigned int datasz
)
6168 case GNU_PROPERTY_X86_ISA_1_USED
:
6169 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6173 ((type
== GNU_PROPERTY_X86_ISA_1_USED
6174 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6175 : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
6177 return property_corrupt
;
6179 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
6180 prop
->u
.number
= bfd_h_get_32 (abfd
, ptr
);
6181 prop
->pr_kind
= property_number
;
6185 return property_ignored
;
6188 return property_number
;
6191 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6192 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6193 should be merged with ABFD. */
6196 elf_i386_merge_gnu_properties (bfd
*abfd ATTRIBUTE_UNUSED
,
6197 elf_property
*aprop
,
6198 elf_property
*bprop
)
6200 unsigned int number
;
6201 bfd_boolean updated
= FALSE
;
6202 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
6206 case GNU_PROPERTY_X86_ISA_1_USED
:
6207 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6208 if (aprop
!= NULL
&& bprop
!= NULL
)
6210 number
= aprop
->u
.number
;
6211 aprop
->u
.number
= number
| bprop
->u
.number
;
6212 updated
= number
!= (unsigned int) aprop
->u
.number
;
6216 /* Return TRUE if APROP is NULL to indicate that BPROP should
6217 be added to ABFD. */
6218 updated
= aprop
== NULL
;
6223 /* Never should happen. */
6230 #define TARGET_LITTLE_SYM i386_elf32_vec
6231 #define TARGET_LITTLE_NAME "elf32-i386"
6232 #define ELF_ARCH bfd_arch_i386
6233 #define ELF_TARGET_ID I386_ELF_DATA
6234 #define ELF_MACHINE_CODE EM_386
6235 #define ELF_MAXPAGESIZE 0x1000
6237 #define elf_backend_can_gc_sections 1
6238 #define elf_backend_can_refcount 1
6239 #define elf_backend_want_got_plt 1
6240 #define elf_backend_plt_readonly 1
6241 #define elf_backend_want_plt_sym 0
6242 #define elf_backend_got_header_size 12
6243 #define elf_backend_plt_alignment 4
6244 #define elf_backend_dtrel_excludes_plt 1
6245 #define elf_backend_extern_protected_data 1
6246 #define elf_backend_caches_rawsize 1
6247 #define elf_backend_want_dynrelro 1
6249 /* Support RELA for objdump of prelink objects. */
6250 #define elf_info_to_howto elf_i386_info_to_howto_rel
6251 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6253 #define bfd_elf32_mkobject elf_i386_mkobject
6255 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6256 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6257 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6258 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6259 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6261 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6262 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6263 #define elf_backend_check_relocs elf_i386_check_relocs
6264 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6265 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
6266 #define elf_backend_fake_sections elf_i386_fake_sections
6267 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6268 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6269 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6270 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6271 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6272 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6273 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6274 #define elf_backend_relocate_section elf_i386_relocate_section
6275 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6276 #define elf_backend_always_size_sections elf_i386_always_size_sections
6277 #define elf_backend_omit_section_dynsym \
6278 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6279 #define elf_backend_hash_symbol elf_i386_hash_symbol
6280 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6281 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
6282 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
6284 #include "elf32-target.h"
6286 /* FreeBSD support. */
6288 #undef TARGET_LITTLE_SYM
6289 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6290 #undef TARGET_LITTLE_NAME
6291 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6293 #define ELF_OSABI ELFOSABI_FREEBSD
6295 /* The kernel recognizes executables as valid only if they carry a
6296 "FreeBSD" label in the ELF header. So we put this label on all
6297 executables and (for simplicity) also all other object files. */
6300 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6302 _bfd_elf_post_process_headers (abfd
, info
);
6304 #ifdef OLD_FREEBSD_ABI_LABEL
6306 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6307 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
6308 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
6313 #undef elf_backend_post_process_headers
6314 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6316 #define elf32_bed elf32_i386_fbsd_bed
6318 #undef elf_backend_add_symbol_hook
6320 #include "elf32-target.h"
6324 #undef TARGET_LITTLE_SYM
6325 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6326 #undef TARGET_LITTLE_NAME
6327 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6329 #undef elf_backend_post_process_headers
6331 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6332 objects won't be recognized. */
6336 #define elf32_bed elf32_i386_sol2_bed
6338 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6340 #undef elf_backend_static_tls_alignment
6341 #define elf_backend_static_tls_alignment 8
6343 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6345 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6347 #undef elf_backend_want_plt_sym
6348 #define elf_backend_want_plt_sym 1
6350 #undef elf_backend_strtab_flags
6351 #define elf_backend_strtab_flags SHF_STRINGS
6353 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6354 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6355 FALSE otherwise. ISECTION is the best guess matching section from the
6356 input bfd IBFD, but it might be NULL. */
6359 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6360 bfd
*obfd ATTRIBUTE_UNUSED
,
6361 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6362 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6364 /* PR 19938: FIXME: Need to add code for setting the sh_info
6365 and sh_link fields of Solaris specific section types. */
6368 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6369 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6371 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6373 The following values should be set:
6376 -----------------------------------------------------------------------------
6377 SHT_SUNW_ancillary The section header index of 0
6378 [0x6fffffee] the associated string table.
6380 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6381 [0x6ffffff0] the associated symbol table. section header index of
6383 SHT_SUNW_capchain table,
6386 SHT_SUNW_symsort The section header index of 0
6387 [0x6ffffff1] the associated symbol table.
6389 SHT_SUNW_tlssort The section header index of 0
6390 [0x6ffffff2] the associated symbol table.
6392 SHT_SUNW_LDYNSYM The section header index of One greater than the
6393 [0x6ffffff3] the associated string table. symbol table index of the
6394 This index is the same string last local symbol,
6395 table used by the SHT_DYNSYM STB_LOCAL. Since
6396 section. SHT_SUNW_LDYNSYM only
6397 contains local symbols,
6398 sh_info is equivalent to
6399 the number of symbols in
6402 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6403 [0x6ffffff5] the section header index of to named strings, the
6404 the associated section header index of
6405 SHT_SUNW_capinfo table, the associated string
6406 otherwise 0. table, otherwise 0.
6408 SHT_SUNW_move The section header index of 0
6409 [0x6ffffffa] the associated symbol table.
6414 SHT_SUNW_syminfo The section header index of The section header index
6415 [0x6ffffffc] the associated symbol table. of the associated
6418 SHT_SUNW_verdef The section header index of The number of version
6419 [0x6ffffffd] the associated string table. definitions within the
6422 SHT_SUNW_verneed The section header index of The number of version
6423 [0x6ffffffe] the associated string table. dependencies within the
6426 SHT_SUNW_versym The section header index of 0
6427 [0x6fffffff] the associated symbol table. */
6430 #undef elf_backend_copy_special_section_fields
6431 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6433 #include "elf32-target.h"
6435 /* Intel MCU support. */
6438 elf32_iamcu_elf_object_p (bfd
*abfd
)
6440 /* Set the right machine number for an IAMCU elf32 file. */
6441 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
6445 #undef TARGET_LITTLE_SYM
6446 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6447 #undef TARGET_LITTLE_NAME
6448 #define TARGET_LITTLE_NAME "elf32-iamcu"
6450 #define ELF_ARCH bfd_arch_iamcu
6452 #undef ELF_MACHINE_CODE
6453 #define ELF_MACHINE_CODE EM_IAMCU
6458 #define elf32_bed elf32_iamcu_bed
6460 #undef elf_backend_object_p
6461 #define elf_backend_object_p elf32_iamcu_elf_object_p
6463 #undef elf_backend_static_tls_alignment
6465 #undef elf_backend_want_plt_sym
6466 #define elf_backend_want_plt_sym 0
6468 #undef elf_backend_strtab_flags
6469 #undef elf_backend_copy_special_section_fields
6471 #include "elf32-target.h"
6473 /* Restore defaults. */
6475 #define ELF_ARCH bfd_arch_i386
6476 #undef ELF_MACHINE_CODE
6477 #define ELF_MACHINE_CODE EM_386
6479 /* Native Client support. */
6481 #undef TARGET_LITTLE_SYM
6482 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6483 #undef TARGET_LITTLE_NAME
6484 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6486 #define elf32_bed elf32_i386_nacl_bed
6488 #undef ELF_MAXPAGESIZE
6489 #define ELF_MAXPAGESIZE 0x10000
6491 /* Restore defaults. */
6493 #undef elf_backend_want_plt_sym
6494 #define elf_backend_want_plt_sym 0
6495 #undef elf_backend_post_process_headers
6496 #undef elf_backend_static_tls_alignment
6498 /* NaCl uses substantially different PLT entries for the same effects. */
6500 #undef elf_backend_plt_alignment
6501 #define elf_backend_plt_alignment 5
6502 #define NACL_PLT_ENTRY_SIZE 64
6503 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6505 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
6507 0xff, 0x35, /* pushl contents of address */
6508 0, 0, 0, 0, /* replaced with address of .got + 4. */
6509 0x8b, 0x0d, /* movl contents of address, %ecx */
6510 0, 0, 0, 0, /* replaced with address of .got + 8. */
6511 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6512 0xff, 0xe1 /* jmp *%ecx */
6515 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6517 0x8b, 0x0d, /* movl contents of address, %ecx */
6518 0, 0, 0, 0, /* replaced with GOT slot address. */
6519 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6520 0xff, 0xe1, /* jmp *%ecx */
6522 /* Pad to the next 32-byte boundary with nop instructions. */
6524 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6525 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6527 /* Lazy GOT entries point here (32-byte aligned). */
6528 0x68, /* pushl immediate */
6529 0, 0, 0, 0, /* replaced with reloc offset. */
6530 0xe9, /* jmp relative */
6531 0, 0, 0, 0, /* replaced with offset to .plt. */
6533 /* Pad to the next 32-byte boundary with nop instructions. */
6534 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6535 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6539 static const bfd_byte
6540 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
6542 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6543 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6544 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6545 0xff, 0xe1, /* jmp *%ecx */
6547 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6548 so pad to that size with nop instructions. */
6549 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6552 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6554 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6555 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6556 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6557 0xff, 0xe1, /* jmp *%ecx */
6559 /* Pad to the next 32-byte boundary with nop instructions. */
6561 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6562 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6564 /* Lazy GOT entries point here (32-byte aligned). */
6565 0x68, /* pushl immediate */
6566 0, 0, 0, 0, /* replaced with offset into relocation table. */
6567 0xe9, /* jmp relative */
6568 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6570 /* Pad to the next 32-byte boundary with nop instructions. */
6571 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6572 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6576 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
6578 #if (PLT_CIE_LENGTH != 20 \
6579 || PLT_FDE_LENGTH != 36 \
6580 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6581 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6582 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6584 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6585 0, 0, 0, 0, /* CIE ID */
6586 1, /* CIE version */
6587 'z', 'R', 0, /* Augmentation string */
6588 1, /* Code alignment factor */
6589 0x7c, /* Data alignment factor: -4 */
6590 8, /* Return address column */
6591 1, /* Augmentation size */
6592 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6593 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6594 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6595 DW_CFA_nop
, DW_CFA_nop
,
6597 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6598 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
6599 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6600 0, 0, 0, 0, /* .plt size goes here */
6601 0, /* Augmentation size */
6602 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
6603 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6604 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
6605 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6606 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6607 13, /* Block length */
6608 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
6609 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
6610 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6611 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
6612 DW_CFA_nop
, DW_CFA_nop
6615 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
6617 elf_i386_nacl_plt0_entry
, /* plt0_entry */
6618 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
6619 2, /* plt0_got1_offset */
6620 8, /* plt0_got2_offset */
6621 elf_i386_nacl_plt_entry
, /* plt_entry */
6622 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6623 2, /* plt_got_offset */
6624 33, /* plt_reloc_offset */
6625 38, /* plt_plt_offset */
6626 32, /* plt_lazy_offset */
6627 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
6628 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
6629 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
6630 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
6631 NULL
, /* eh_frame_plt_got */
6632 0, /* eh_frame_plt_got_size */
6635 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
6637 &elf_i386_nacl_plt
, /* plt */
6638 0x90, /* plt0_pad_byte: nop insn */
6643 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
6645 /* Set the right machine number for a NaCl i386 ELF32 file. */
6646 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
6650 #undef elf_backend_arch_data
6651 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6653 #undef elf_backend_object_p
6654 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6655 #undef elf_backend_modify_segment_map
6656 #define elf_backend_modify_segment_map nacl_modify_segment_map
6657 #undef elf_backend_modify_program_headers
6658 #define elf_backend_modify_program_headers nacl_modify_program_headers
6659 #undef elf_backend_final_write_processing
6660 #define elf_backend_final_write_processing nacl_final_write_processing
6662 #include "elf32-target.h"
6664 /* Restore defaults. */
6665 #undef elf_backend_object_p
6666 #undef elf_backend_modify_segment_map
6667 #undef elf_backend_modify_program_headers
6668 #undef elf_backend_final_write_processing
6670 /* VxWorks support. */
6672 #undef TARGET_LITTLE_SYM
6673 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6674 #undef TARGET_LITTLE_NAME
6675 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6677 #undef ELF_MAXPAGESIZE
6678 #define ELF_MAXPAGESIZE 0x1000
6679 #undef elf_backend_plt_alignment
6680 #define elf_backend_plt_alignment 4
6682 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
6684 &elf_i386_plt
, /* plt */
6685 0x90, /* plt0_pad_byte */
6689 #undef elf_backend_arch_data
6690 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6692 #undef elf_backend_relocs_compatible
6693 #undef elf_backend_add_symbol_hook
6694 #define elf_backend_add_symbol_hook \
6695 elf_vxworks_add_symbol_hook
6696 #undef elf_backend_link_output_symbol_hook
6697 #define elf_backend_link_output_symbol_hook \
6698 elf_vxworks_link_output_symbol_hook
6699 #undef elf_backend_emit_relocs
6700 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6701 #undef elf_backend_final_write_processing
6702 #define elf_backend_final_write_processing \
6703 elf_vxworks_final_write_processing
6704 #undef elf_backend_static_tls_alignment
6706 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6708 #undef elf_backend_want_plt_sym
6709 #define elf_backend_want_plt_sym 1
6712 #define elf32_bed elf32_i386_vxworks_bed
6714 #include "elf32-target.h"