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 /* 0: symbol isn't ___tls_get_addr.
824 1: symbol is ___tls_get_addr.
825 2: symbol is unknown. */
826 unsigned int tls_get_addr
: 2;
828 /* Reference count of C/C++ function pointer relocations in read-write
829 section which can be resolved at run-time. */
830 bfd_signed_vma func_pointer_refcount
;
832 /* Information about the GOT PLT entry. Filled when there are both
833 GOT and PLT relocations against the same function. */
834 union gotplt_union plt_got
;
836 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
837 starting at the end of the jump table. */
841 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
843 struct elf_i386_obj_tdata
845 struct elf_obj_tdata root
;
847 /* tls_type for each local got entry. */
848 char *local_got_tls_type
;
850 /* GOTPLT entries for TLS descriptors. */
851 bfd_vma
*local_tlsdesc_gotent
;
854 #define elf_i386_tdata(abfd) \
855 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
857 #define elf_i386_local_got_tls_type(abfd) \
858 (elf_i386_tdata (abfd)->local_got_tls_type)
860 #define elf_i386_local_tlsdesc_gotent(abfd) \
861 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
863 #define is_i386_elf(bfd) \
864 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
865 && elf_tdata (bfd) != NULL \
866 && elf_object_id (bfd) == I386_ELF_DATA)
869 elf_i386_mkobject (bfd
*abfd
)
871 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
875 /* i386 ELF linker hash table. */
877 struct elf_i386_link_hash_table
879 struct elf_link_hash_table elf
;
881 /* Short-cuts to get to dynamic linker sections. */
883 asection
*plt_eh_frame
;
885 asection
*plt_got_eh_frame
;
889 bfd_signed_vma refcount
;
893 /* The amount of space used by the reserved portion of the sgotplt
894 section, plus whatever space is used by the jump slots. */
895 bfd_vma sgotplt_jump_table_size
;
897 /* Small local sym cache. */
898 struct sym_cache sym_cache
;
900 /* _TLS_MODULE_BASE_ symbol. */
901 struct bfd_link_hash_entry
*tls_module_base
;
903 /* Used by local STT_GNU_IFUNC symbols. */
904 htab_t loc_hash_table
;
905 void * loc_hash_memory
;
907 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
910 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
911 bfd_vma next_tls_desc_index
;
913 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
914 bfd_vma next_jump_slot_index
;
916 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
917 bfd_vma next_irelative_index
;
919 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
920 to read-only sections. */
921 bfd_boolean readonly_dynrelocs_against_ifunc
;
924 /* Get the i386 ELF linker hash table from a link_info structure. */
926 #define elf_i386_hash_table(p) \
927 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
928 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
930 #define elf_i386_compute_jump_table_size(htab) \
931 ((htab)->elf.srelplt->reloc_count * 4)
933 /* Create an entry in an i386 ELF linker hash table. */
935 static struct bfd_hash_entry
*
936 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
937 struct bfd_hash_table
*table
,
940 /* Allocate the structure if it has not already been allocated by a
944 entry
= (struct bfd_hash_entry
*)
945 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
950 /* Call the allocation method of the superclass. */
951 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
954 struct elf_i386_link_hash_entry
*eh
;
956 eh
= (struct elf_i386_link_hash_entry
*) entry
;
957 eh
->dyn_relocs
= NULL
;
958 eh
->tls_type
= GOT_UNKNOWN
;
960 eh
->has_got_reloc
= 0;
961 eh
->has_non_got_reloc
= 0;
962 eh
->tls_get_addr
= 2;
963 eh
->func_pointer_refcount
= 0;
964 eh
->plt_got
.offset
= (bfd_vma
) -1;
965 eh
->tlsdesc_got
= (bfd_vma
) -1;
971 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
972 for local symbol so that we can handle local STT_GNU_IFUNC symbols
973 as global symbol. We reuse indx and dynstr_index for local symbol
974 hash since they aren't used by global symbols in this backend. */
977 elf_i386_local_htab_hash (const void *ptr
)
979 struct elf_link_hash_entry
*h
980 = (struct elf_link_hash_entry
*) ptr
;
981 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
984 /* Compare local hash entries. */
987 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
989 struct elf_link_hash_entry
*h1
990 = (struct elf_link_hash_entry
*) ptr1
;
991 struct elf_link_hash_entry
*h2
992 = (struct elf_link_hash_entry
*) ptr2
;
994 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
997 /* Find and/or create a hash entry for local symbol. */
999 static struct elf_link_hash_entry
*
1000 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
1001 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1004 struct elf_i386_link_hash_entry e
, *ret
;
1005 asection
*sec
= abfd
->sections
;
1006 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1007 ELF32_R_SYM (rel
->r_info
));
1010 e
.elf
.indx
= sec
->id
;
1011 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1012 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1013 create
? INSERT
: NO_INSERT
);
1020 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
1024 ret
= (struct elf_i386_link_hash_entry
*)
1025 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1026 sizeof (struct elf_i386_link_hash_entry
));
1029 memset (ret
, 0, sizeof (*ret
));
1030 ret
->elf
.indx
= sec
->id
;
1031 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1032 ret
->elf
.dynindx
= -1;
1033 ret
->func_pointer_refcount
= 0;
1034 ret
->plt_got
.offset
= (bfd_vma
) -1;
1040 /* Destroy an i386 ELF linker hash table. */
1043 elf_i386_link_hash_table_free (bfd
*obfd
)
1045 struct elf_i386_link_hash_table
*htab
1046 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1048 if (htab
->loc_hash_table
)
1049 htab_delete (htab
->loc_hash_table
);
1050 if (htab
->loc_hash_memory
)
1051 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1052 _bfd_elf_link_hash_table_free (obfd
);
1055 /* Create an i386 ELF linker hash table. */
1057 static struct bfd_link_hash_table
*
1058 elf_i386_link_hash_table_create (bfd
*abfd
)
1060 struct elf_i386_link_hash_table
*ret
;
1061 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1063 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1067 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1068 elf_i386_link_hash_newfunc
,
1069 sizeof (struct elf_i386_link_hash_entry
),
1076 ret
->loc_hash_table
= htab_try_create (1024,
1077 elf_i386_local_htab_hash
,
1078 elf_i386_local_htab_eq
,
1080 ret
->loc_hash_memory
= objalloc_create ();
1081 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1083 elf_i386_link_hash_table_free (abfd
);
1086 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1088 return &ret
->elf
.root
;
1091 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1092 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1096 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1098 struct elf_i386_link_hash_table
*htab
;
1100 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1103 htab
= elf_i386_hash_table (info
);
1107 /* Set the contents of the .interp section to the interpreter. */
1108 if (bfd_link_executable (info
) && !info
->nointerp
)
1110 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
1113 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1114 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1118 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1119 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1123 if (!info
->no_ld_generated_unwind_info
1124 && htab
->plt_eh_frame
== NULL
1125 && htab
->elf
.splt
!= NULL
)
1127 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1128 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1129 | SEC_LINKER_CREATED
);
1131 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1132 if (htab
->plt_eh_frame
== NULL
1133 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1140 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1143 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1144 struct elf_link_hash_entry
*dir
,
1145 struct elf_link_hash_entry
*ind
)
1147 struct elf_i386_link_hash_entry
*edir
, *eind
;
1149 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1150 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1152 if (eind
->dyn_relocs
!= NULL
)
1154 if (edir
->dyn_relocs
!= NULL
)
1156 struct elf_dyn_relocs
**pp
;
1157 struct elf_dyn_relocs
*p
;
1159 /* Add reloc counts against the indirect sym to the direct sym
1160 list. Merge any entries against the same section. */
1161 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1163 struct elf_dyn_relocs
*q
;
1165 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1166 if (q
->sec
== p
->sec
)
1168 q
->pc_count
+= p
->pc_count
;
1169 q
->count
+= p
->count
;
1176 *pp
= edir
->dyn_relocs
;
1179 edir
->dyn_relocs
= eind
->dyn_relocs
;
1180 eind
->dyn_relocs
= NULL
;
1183 if (ind
->root
.type
== bfd_link_hash_indirect
1184 && dir
->got
.refcount
<= 0)
1186 edir
->tls_type
= eind
->tls_type
;
1187 eind
->tls_type
= GOT_UNKNOWN
;
1190 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1191 generate a R_386_COPY reloc. */
1192 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1194 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1195 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1197 if (ELIMINATE_COPY_RELOCS
1198 && ind
->root
.type
!= bfd_link_hash_indirect
1199 && dir
->dynamic_adjusted
)
1201 /* If called to transfer flags for a weakdef during processing
1202 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1203 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1204 if (dir
->versioned
!= versioned_hidden
)
1205 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1206 dir
->ref_regular
|= ind
->ref_regular
;
1207 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1208 dir
->needs_plt
|= ind
->needs_plt
;
1209 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1213 if (eind
->func_pointer_refcount
> 0)
1215 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1216 eind
->func_pointer_refcount
= 0;
1219 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1223 /* Return TRUE if the TLS access code sequence support transition
1227 elf_i386_check_tls_transition (asection
*sec
,
1229 Elf_Internal_Shdr
*symtab_hdr
,
1230 struct elf_link_hash_entry
**sym_hashes
,
1231 unsigned int r_type
,
1232 const Elf_Internal_Rela
*rel
,
1233 const Elf_Internal_Rela
*relend
)
1235 unsigned int val
, type
, reg
;
1236 unsigned long r_symndx
;
1237 struct elf_link_hash_entry
*h
;
1240 bfd_boolean indirect_call
, tls_get_addr
;
1242 offset
= rel
->r_offset
;
1247 if (offset
< 2 || (rel
+ 1) >= relend
)
1250 indirect_call
= FALSE
;
1251 call
= contents
+ offset
+ 4;
1254 if (r_type
== R_386_TLS_GD
)
1256 /* Check transition from GD access model. Only
1257 leal foo@tlsgd(,%ebx,1), %eax
1258 call ___tls_get_addr@PLT
1260 leal foo@tlsgd(%ebx) %eax
1261 call ___tls_get_addr@PLT
1264 leal foo@tlsgd(%reg), %eax
1265 call *___tls_get_addr@GOT(%reg)
1266 which may be converted to
1267 addr32 call ___tls_get_addr
1268 can transit to different access model. */
1269 if ((offset
+ 10) > sec
->size
1270 || (type
!= 0x8d && type
!= 0x04))
1275 /* leal foo@tlsgd(,%ebx,1), %eax
1276 call ___tls_get_addr@PLT */
1280 if (*(call
- 7) != 0x8d
1288 leal foo@tlsgd(%ebx), %eax
1289 call ___tls_get_addr@PLT
1292 leal foo@tlsgd(%reg), %eax
1293 call *___tls_get_addr@GOT(%reg)
1294 which may be converted to
1295 addr32 call ___tls_get_addr
1297 %eax can't be used as the GOT base register since it
1298 is used to pass parameter to ___tls_get_addr. */
1300 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1303 indirect_call
= call
[0] == 0xff;
1304 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
1305 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1307 && (call
[1] & 0xf8) == 0x90
1308 && (call
[1] & 0x7) == reg
))
1314 /* Check transition from LD access model. Only
1315 leal foo@tlsldm(%ebx), %eax
1316 call ___tls_get_addr@PLT
1318 leal foo@tlsldm(%reg), %eax
1319 call *___tls_get_addr@GOT(%reg)
1320 which may be converted to
1321 addr32 call ___tls_get_addr
1322 can transit to different access model. */
1323 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1326 /* %eax can't be used as the GOT base register since it is
1327 used to pass parameter to ___tls_get_addr. */
1329 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1332 indirect_call
= call
[0] == 0xff;
1333 if (!(reg
== 3 && call
[0] == 0xe8)
1334 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1336 && (call
[1] & 0xf8) == 0x90
1337 && (call
[1] & 0x7) == reg
))
1341 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1342 if (r_symndx
< symtab_hdr
->sh_info
)
1345 tls_get_addr
= FALSE
;
1346 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1347 if (h
!= NULL
&& h
->root
.root
.string
!= NULL
)
1349 struct elf_i386_link_hash_entry
*eh
1350 = (struct elf_i386_link_hash_entry
*) h
;
1351 tls_get_addr
= eh
->tls_get_addr
== 1;
1352 if (eh
->tls_get_addr
> 1)
1354 /* Use strncmp to check ___tls_get_addr since
1355 ___tls_get_addr may be versioned. */
1356 if (strncmp (h
->root
.root
.string
, "___tls_get_addr", 15)
1359 eh
->tls_get_addr
= 1;
1360 tls_get_addr
= TRUE
;
1363 eh
->tls_get_addr
= 0;
1369 else if (indirect_call
)
1370 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
1372 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1373 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
1376 /* Check transition from IE access model:
1377 movl foo@indntpoff(%rip), %eax
1378 movl foo@indntpoff(%rip), %reg
1379 addl foo@indntpoff(%rip), %reg
1382 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1385 /* Check "movl foo@tpoff(%rip), %eax" first. */
1386 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1393 /* Check movl|addl foo@tpoff(%rip), %reg. */
1394 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1395 return ((type
== 0x8b || type
== 0x03)
1396 && (val
& 0xc7) == 0x05);
1398 case R_386_TLS_GOTIE
:
1399 case R_386_TLS_IE_32
:
1400 /* Check transition from {IE_32,GOTIE} access model:
1401 subl foo@{tpoff,gontoff}(%reg1), %reg2
1402 movl foo@{tpoff,gontoff}(%reg1), %reg2
1403 addl foo@{tpoff,gontoff}(%reg1), %reg2
1406 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1409 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1410 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1413 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1414 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1416 case R_386_TLS_GOTDESC
:
1417 /* Check transition from GDesc access model:
1418 leal x@tlsdesc(%ebx), %eax
1420 Make sure it's a leal adding ebx to a 32-bit offset
1421 into any register, although it's probably almost always
1424 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1427 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1430 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1431 return (val
& 0xc7) == 0x83;
1433 case R_386_TLS_DESC_CALL
:
1434 /* Check transition from GDesc access model:
1435 call *x@tlsdesc(%eax)
1437 if (offset
+ 2 <= sec
->size
)
1439 /* Make sure that it's a call *x@tlsdesc(%eax). */
1440 call
= contents
+ offset
;
1441 return call
[0] == 0xff && call
[1] == 0x10;
1451 /* Return TRUE if the TLS access transition is OK or no transition
1452 will be performed. Update R_TYPE if there is a transition. */
1455 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1456 asection
*sec
, bfd_byte
*contents
,
1457 Elf_Internal_Shdr
*symtab_hdr
,
1458 struct elf_link_hash_entry
**sym_hashes
,
1459 unsigned int *r_type
, int tls_type
,
1460 const Elf_Internal_Rela
*rel
,
1461 const Elf_Internal_Rela
*relend
,
1462 struct elf_link_hash_entry
*h
,
1463 unsigned long r_symndx
,
1464 bfd_boolean from_relocate_section
)
1466 unsigned int from_type
= *r_type
;
1467 unsigned int to_type
= from_type
;
1468 bfd_boolean check
= TRUE
;
1470 /* Skip TLS transition for functions. */
1472 && (h
->type
== STT_FUNC
1473 || h
->type
== STT_GNU_IFUNC
))
1479 case R_386_TLS_GOTDESC
:
1480 case R_386_TLS_DESC_CALL
:
1481 case R_386_TLS_IE_32
:
1483 case R_386_TLS_GOTIE
:
1484 if (bfd_link_executable (info
))
1487 to_type
= R_386_TLS_LE_32
;
1488 else if (from_type
!= R_386_TLS_IE
1489 && from_type
!= R_386_TLS_GOTIE
)
1490 to_type
= R_386_TLS_IE_32
;
1493 /* When we are called from elf_i386_relocate_section, there may
1494 be additional transitions based on TLS_TYPE. */
1495 if (from_relocate_section
)
1497 unsigned int new_to_type
= to_type
;
1499 if (bfd_link_executable (info
)
1502 && (tls_type
& GOT_TLS_IE
))
1503 new_to_type
= R_386_TLS_LE_32
;
1505 if (to_type
== R_386_TLS_GD
1506 || to_type
== R_386_TLS_GOTDESC
1507 || to_type
== R_386_TLS_DESC_CALL
)
1509 if (tls_type
== GOT_TLS_IE_POS
)
1510 new_to_type
= R_386_TLS_GOTIE
;
1511 else if (tls_type
& GOT_TLS_IE
)
1512 new_to_type
= R_386_TLS_IE_32
;
1515 /* We checked the transition before when we were called from
1516 elf_i386_check_relocs. We only want to check the new
1517 transition which hasn't been checked before. */
1518 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1519 to_type
= new_to_type
;
1525 if (bfd_link_executable (info
))
1526 to_type
= R_386_TLS_LE_32
;
1533 /* Return TRUE if there is no transition. */
1534 if (from_type
== to_type
)
1537 /* Check if the transition can be performed. */
1539 && ! elf_i386_check_tls_transition (sec
, contents
,
1540 symtab_hdr
, sym_hashes
,
1541 from_type
, rel
, relend
))
1543 reloc_howto_type
*from
, *to
;
1546 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1547 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1550 name
= h
->root
.root
.string
;
1553 struct elf_i386_link_hash_table
*htab
;
1555 htab
= elf_i386_hash_table (info
);
1560 Elf_Internal_Sym
*isym
;
1562 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1564 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1569 /* xgettext:c-format */
1570 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1571 "in section `%A' failed"),
1572 abfd
, from
->name
, to
->name
, name
,
1573 (unsigned long) rel
->r_offset
, sec
);
1574 bfd_set_error (bfd_error_bad_value
);
1582 /* With the local symbol, foo, we convert
1583 mov foo@GOT[(%reg1)], %reg2
1585 lea foo[@GOTOFF(%reg1)], %reg2
1587 call/jmp *foo@GOT[(%reg)]
1589 nop call foo/jmp foo nop
1590 When PIC is false, convert
1591 test %reg1, foo@GOT[(%reg2)]
1595 binop foo@GOT[(%reg1)], %reg2
1598 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1603 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1605 Elf_Internal_Rela
*irel
,
1606 struct elf_link_hash_entry
*h
,
1607 bfd_boolean
*converted
,
1608 struct bfd_link_info
*link_info
)
1610 struct elf_i386_link_hash_table
*htab
;
1611 unsigned int opcode
;
1613 bfd_boolean baseless
;
1614 Elf_Internal_Sym
*isym
;
1615 unsigned int addend
;
1619 bfd_boolean to_reloc_32
;
1620 unsigned int r_type
;
1621 unsigned int r_symndx
;
1622 bfd_vma roff
= irel
->r_offset
;
1627 /* Addend for R_386_GOT32X relocations must be 0. */
1628 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1632 htab
= elf_i386_hash_table (link_info
);
1633 is_pic
= bfd_link_pic (link_info
);
1635 r_type
= ELF32_R_TYPE (irel
->r_info
);
1636 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1638 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1639 baseless
= (modrm
& 0xc7) == 0x5;
1641 if (baseless
&& is_pic
)
1643 /* For PIC, disallow R_386_GOT32X without a base register
1644 since we don't know what the GOT base is. */
1649 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1651 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1654 name
= h
->root
.root
.string
;
1657 /* xgettext:c-format */
1658 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1659 " register can not be used when making a shared object"),
1664 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1666 /* Convert to R_386_32 if PIC is false or there is no base
1668 to_reloc_32
= !is_pic
|| baseless
;
1670 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1674 if (opcode
== 0x0ff)
1675 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1676 goto convert_branch
;
1678 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1679 "test %reg1, foo@GOT(%reg2)" and
1680 "binop foo@GOT[(%reg1)], %reg2". */
1684 /* Undefined weak symbol is only bound locally in executable
1685 and its reference is resolved as 0. */
1686 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
, TRUE
,
1687 elf_i386_hash_entry (h
)))
1691 /* No direct branch to 0 for PIC. */
1695 goto convert_branch
;
1699 /* We can convert load of address 0 to R_386_32. */
1707 /* We have "call/jmp *foo@GOT[(%reg)]". */
1708 if ((h
->root
.type
== bfd_link_hash_defined
1709 || h
->root
.type
== bfd_link_hash_defweak
)
1710 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1712 /* The function is locally defined. */
1714 /* Convert R_386_GOT32X to R_386_PC32. */
1715 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1717 struct elf_i386_link_hash_entry
*eh
1718 = (struct elf_i386_link_hash_entry
*) h
;
1720 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1723 /* To support TLS optimization, always use addr32 prefix
1724 for "call *___tls_get_addr@GOT(%reg)". */
1725 if (eh
&& eh
->tls_get_addr
== 1)
1728 nop_offset
= irel
->r_offset
- 2;
1732 nop
= link_info
->call_nop_byte
;
1733 if (link_info
->call_nop_as_suffix
)
1735 nop_offset
= roff
+ 3;
1736 irel
->r_offset
-= 1;
1739 nop_offset
= roff
- 2;
1744 /* Convert to "jmp foo nop". */
1747 nop_offset
= roff
+ 3;
1748 irel
->r_offset
-= 1;
1751 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1752 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1753 /* When converting to PC-relative relocation, we
1754 need to adjust addend by -4. */
1755 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1756 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1763 /* We have "mov foo@GOT[(%re1g)], %reg2",
1764 "test %reg1, foo@GOT(%reg2)" and
1765 "binop foo@GOT[(%reg1)], %reg2".
1767 Avoid optimizing _DYNAMIC since ld.so may use its
1768 link-time address. */
1769 if (h
== htab
->elf
.hdynamic
)
1772 /* def_regular is set by an assignment in a linker script in
1773 bfd_elf_record_link_assignment. */
1775 || h
->root
.type
== bfd_link_hash_defined
1776 || h
->root
.type
== bfd_link_hash_defweak
)
1777 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1784 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1785 "mov $foo, %reg2" with R_386_32. */
1787 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1788 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1793 /* Convert "mov foo@GOT(%reg1), %reg2" to
1794 "lea foo@GOTOFF(%reg1), %reg2". */
1795 r_type
= R_386_GOTOFF
;
1801 /* Only R_386_32 is supported. */
1807 /* Convert "test %reg1, foo@GOT(%reg2)" to
1808 "test $foo, %reg1". */
1809 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1814 /* Convert "binop foo@GOT(%reg1), %reg2" to
1815 "binop $foo, %reg2". */
1817 | (modrm
& 0x38) >> 3
1821 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1825 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1826 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1835 /* Rename some of the generic section flags to better document how they
1837 #define need_convert_load sec_flg0
1838 #define check_relocs_failed sec_flg1
1840 /* Look through the relocs for a section during the first phase, and
1841 calculate needed space in the global offset table, procedure linkage
1842 table, and dynamic reloc sections. */
1845 elf_i386_check_relocs (bfd
*abfd
,
1846 struct bfd_link_info
*info
,
1848 const Elf_Internal_Rela
*relocs
)
1850 struct elf_i386_link_hash_table
*htab
;
1851 Elf_Internal_Shdr
*symtab_hdr
;
1852 struct elf_link_hash_entry
**sym_hashes
;
1853 const Elf_Internal_Rela
*rel
;
1854 const Elf_Internal_Rela
*rel_end
;
1857 bfd_boolean use_plt_got
;
1859 if (bfd_link_relocatable (info
))
1862 /* Don't do anything special with non-loaded, non-alloced sections.
1863 In particular, any relocs in such sections should not affect GOT
1864 and PLT reference counting (ie. we don't allow them to create GOT
1865 or PLT entries), there's no possibility or desire to optimize TLS
1866 relocs, and there's not much point in propagating relocs to shared
1867 libs that the dynamic linker won't relocate. */
1868 if ((sec
->flags
& SEC_ALLOC
) == 0)
1871 BFD_ASSERT (is_i386_elf (abfd
));
1873 htab
= elf_i386_hash_table (info
);
1876 sec
->check_relocs_failed
= 1;
1880 /* Get the section contents. */
1881 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1882 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1883 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1885 sec
->check_relocs_failed
= 1;
1889 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1890 && (get_elf_i386_backend_data (abfd
)
1891 == &elf_i386_arch_bed
));
1893 symtab_hdr
= &elf_symtab_hdr (abfd
);
1894 sym_hashes
= elf_sym_hashes (abfd
);
1898 rel_end
= relocs
+ sec
->reloc_count
;
1899 for (rel
= relocs
; rel
< rel_end
; rel
++)
1901 unsigned int r_type
;
1902 unsigned long r_symndx
;
1903 struct elf_link_hash_entry
*h
;
1904 struct elf_i386_link_hash_entry
*eh
;
1905 Elf_Internal_Sym
*isym
;
1907 bfd_boolean size_reloc
;
1909 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1910 r_type
= ELF32_R_TYPE (rel
->r_info
);
1912 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1914 /* xgettext:c-format */
1915 _bfd_error_handler (_("%B: bad symbol index: %d"),
1920 if (r_symndx
< symtab_hdr
->sh_info
)
1922 /* A local symbol. */
1923 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1928 /* Check relocation against local STT_GNU_IFUNC symbol. */
1929 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1931 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1935 /* Fake a STT_GNU_IFUNC symbol. */
1936 h
->type
= STT_GNU_IFUNC
;
1939 h
->forced_local
= 1;
1940 h
->root
.type
= bfd_link_hash_defined
;
1948 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1949 while (h
->root
.type
== bfd_link_hash_indirect
1950 || h
->root
.type
== bfd_link_hash_warning
)
1951 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1954 eh
= (struct elf_i386_link_hash_entry
*) h
;
1970 if (htab
->elf
.dynobj
== NULL
)
1971 htab
->elf
.dynobj
= abfd
;
1972 /* Create the ifunc sections for static executables. */
1973 if (h
->type
== STT_GNU_IFUNC
1974 && !_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
,
1980 /* It is referenced by a non-shared object. */
1982 h
->root
.non_ir_ref
= 1;
1984 if (h
->type
== STT_GNU_IFUNC
)
1985 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1986 |= elf_gnu_symbol_ifunc
;
1989 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
1990 symtab_hdr
, sym_hashes
,
1991 &r_type
, GOT_UNKNOWN
,
1992 rel
, rel_end
, h
, r_symndx
, FALSE
))
1998 htab
->tls_ldm_got
.refcount
+= 1;
2002 /* This symbol requires a procedure linkage table entry. We
2003 actually build the entry in adjust_dynamic_symbol,
2004 because this might be a case of linking PIC code which is
2005 never referenced by a dynamic object, in which case we
2006 don't need to generate a procedure linkage table entry
2009 /* If this is a local symbol, we resolve it directly without
2010 creating a procedure linkage table entry. */
2014 eh
->has_got_reloc
= 1;
2016 h
->plt
.refcount
+= 1;
2023 case R_386_TLS_IE_32
:
2025 case R_386_TLS_GOTIE
:
2026 if (!bfd_link_executable (info
))
2027 info
->flags
|= DF_STATIC_TLS
;
2033 case R_386_TLS_GOTDESC
:
2034 case R_386_TLS_DESC_CALL
:
2035 /* This symbol requires a global offset table entry. */
2037 int tls_type
, old_tls_type
;
2044 tls_type
= GOT_NORMAL
;
2046 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
2047 case R_386_TLS_GOTDESC
:
2048 case R_386_TLS_DESC_CALL
:
2049 tls_type
= GOT_TLS_GDESC
; break;
2050 case R_386_TLS_IE_32
:
2051 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
2052 tls_type
= GOT_TLS_IE_NEG
;
2054 /* If this is a GD->IE transition, we may use either of
2055 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2056 tls_type
= GOT_TLS_IE
;
2059 case R_386_TLS_GOTIE
:
2060 tls_type
= GOT_TLS_IE_POS
; break;
2065 h
->got
.refcount
+= 1;
2066 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2070 bfd_signed_vma
*local_got_refcounts
;
2072 /* This is a global offset table entry for a local symbol. */
2073 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2074 if (local_got_refcounts
== NULL
)
2078 size
= symtab_hdr
->sh_info
;
2079 size
*= (sizeof (bfd_signed_vma
)
2080 + sizeof (bfd_vma
) + sizeof(char));
2081 local_got_refcounts
= (bfd_signed_vma
*)
2082 bfd_zalloc (abfd
, size
);
2083 if (local_got_refcounts
== NULL
)
2085 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2086 elf_i386_local_tlsdesc_gotent (abfd
)
2087 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2088 elf_i386_local_got_tls_type (abfd
)
2089 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2091 local_got_refcounts
[r_symndx
] += 1;
2092 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
2095 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
2096 tls_type
|= old_tls_type
;
2097 /* If a TLS symbol is accessed using IE at least once,
2098 there is no point to use dynamic model for it. */
2099 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2100 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2101 || (tls_type
& GOT_TLS_IE
) == 0))
2103 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
2104 tls_type
= old_tls_type
;
2105 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2106 && GOT_TLS_GD_ANY_P (tls_type
))
2107 tls_type
|= old_tls_type
;
2111 name
= h
->root
.root
.string
;
2113 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2116 /* xgettext:c-format */
2117 (_("%B: `%s' accessed both as normal and "
2118 "thread local symbol"),
2120 bfd_set_error (bfd_error_bad_value
);
2125 if (old_tls_type
!= tls_type
)
2128 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
2130 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2138 if (htab
->elf
.sgot
== NULL
)
2140 if (htab
->elf
.dynobj
== NULL
)
2141 htab
->elf
.dynobj
= abfd
;
2142 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2145 if (r_type
!= R_386_TLS_IE
)
2148 eh
->has_got_reloc
= 1;
2153 case R_386_TLS_LE_32
:
2156 eh
->has_got_reloc
= 1;
2157 if (bfd_link_executable (info
))
2159 info
->flags
|= DF_STATIC_TLS
;
2164 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2165 eh
->has_non_got_reloc
= 1;
2167 /* We are called after all symbols have been resolved. Only
2168 relocation against STT_GNU_IFUNC symbol must go through
2171 && (bfd_link_executable (info
)
2172 || h
->type
== STT_GNU_IFUNC
))
2174 /* If this reloc is in a read-only section, we might
2175 need a copy reloc. We can't check reliably at this
2176 stage whether the section is read-only, as input
2177 sections have not yet been mapped to output sections.
2178 Tentatively set the flag for now, and correct in
2179 adjust_dynamic_symbol. */
2182 /* We may need a .plt entry if the symbol is a function
2183 defined in a shared lib or is a STT_GNU_IFUNC function
2184 referenced from the code or read-only section. */
2186 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2187 h
->plt
.refcount
+= 1;
2189 if (r_type
== R_386_PC32
)
2191 /* Since something like ".long foo - ." may be used
2192 as pointer, make sure that PLT is used if foo is
2193 a function defined in a shared library. */
2194 if ((sec
->flags
& SEC_CODE
) == 0)
2195 h
->pointer_equality_needed
= 1;
2196 else if (h
->type
== STT_GNU_IFUNC
2197 && bfd_link_pic (info
))
2200 name
= h
->root
.root
.string
;
2202 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2205 /* xgettext:c-format */
2206 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2208 bfd_set_error (bfd_error_bad_value
);
2214 h
->pointer_equality_needed
= 1;
2215 /* R_386_32 can be resolved at run-time. */
2216 if (r_type
== R_386_32
2217 && (sec
->flags
& SEC_READONLY
) == 0)
2218 eh
->func_pointer_refcount
+= 1;
2224 /* If we are creating a shared library, and this is a reloc
2225 against a global symbol, or a non PC relative reloc
2226 against a local symbol, then we need to copy the reloc
2227 into the shared library. However, if we are linking with
2228 -Bsymbolic, we do not need to copy a reloc against a
2229 global symbol which is defined in an object we are
2230 including in the link (i.e., DEF_REGULAR is set). At
2231 this point we have not seen all the input files, so it is
2232 possible that DEF_REGULAR is not set now but will be set
2233 later (it is never cleared). In case of a weak definition,
2234 DEF_REGULAR may be cleared later by a strong definition in
2235 a shared library. We account for that possibility below by
2236 storing information in the relocs_copied field of the hash
2237 table entry. A similar situation occurs when creating
2238 shared libraries and symbol visibility changes render the
2241 If on the other hand, we are creating an executable, we
2242 may need to keep relocations for symbols satisfied by a
2243 dynamic library if we manage to avoid copy relocs for the
2246 Generate dynamic pointer relocation against STT_GNU_IFUNC
2247 symbol in the non-code section. */
2248 if ((bfd_link_pic (info
)
2249 && (r_type
!= R_386_PC32
2251 && (! (bfd_link_pie (info
)
2252 || SYMBOLIC_BIND (info
, h
))
2253 || h
->root
.type
== bfd_link_hash_defweak
2254 || !h
->def_regular
))))
2256 && h
->type
== STT_GNU_IFUNC
2257 && r_type
== R_386_32
2258 && (sec
->flags
& SEC_CODE
) == 0)
2259 || (ELIMINATE_COPY_RELOCS
2260 && !bfd_link_pic (info
)
2262 && (h
->root
.type
== bfd_link_hash_defweak
2263 || !h
->def_regular
)))
2265 struct elf_dyn_relocs
*p
;
2266 struct elf_dyn_relocs
**head
;
2268 /* We must copy these reloc types into the output file.
2269 Create a reloc section in dynobj and make room for
2273 if (htab
->elf
.dynobj
== NULL
)
2274 htab
->elf
.dynobj
= abfd
;
2276 sreloc
= _bfd_elf_make_dynamic_reloc_section
2277 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
2283 /* If this is a global symbol, we count the number of
2284 relocations we need for this symbol. */
2287 head
= &eh
->dyn_relocs
;
2291 /* Track dynamic relocs needed for local syms too.
2292 We really need local syms available to do this
2297 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2302 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2306 vpp
= &elf_section_data (s
)->local_dynrel
;
2307 head
= (struct elf_dyn_relocs
**)vpp
;
2311 if (p
== NULL
|| p
->sec
!= sec
)
2313 bfd_size_type amt
= sizeof *p
;
2314 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
2326 /* Count size relocation as PC-relative relocation. */
2327 if (r_type
== R_386_PC32
|| size_reloc
)
2332 /* This relocation describes the C++ object vtable hierarchy.
2333 Reconstruct it for later use during GC. */
2334 case R_386_GNU_VTINHERIT
:
2335 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2339 /* This relocation describes which C++ vtable entries are actually
2340 used. Record for later use during GC. */
2341 case R_386_GNU_VTENTRY
:
2342 BFD_ASSERT (h
!= NULL
);
2344 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2354 && h
->plt
.refcount
> 0
2355 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2356 || h
->got
.refcount
> 0)
2357 && htab
->plt_got
== NULL
)
2359 /* Create the GOT procedure linkage table. */
2360 unsigned int plt_got_align
;
2361 const struct elf_backend_data
*bed
;
2363 bed
= get_elf_backend_data (info
->output_bfd
);
2364 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
2365 && (sizeof (elf_i386_got_plt_entry
)
2366 == sizeof (elf_i386_pic_got_plt_entry
)));
2369 if (htab
->elf
.dynobj
== NULL
)
2370 htab
->elf
.dynobj
= abfd
;
2372 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2374 (bed
->dynamic_sec_flags
2379 if (htab
->plt_got
== NULL
2380 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2385 if (!info
->no_ld_generated_unwind_info
2386 && htab
->plt_got_eh_frame
== NULL
2387 && get_elf_i386_backend_data (abfd
)->plt
->eh_frame_plt_got
!= NULL
)
2389 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
2390 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
2391 | SEC_LINKER_CREATED
);
2392 htab
->plt_got_eh_frame
2393 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2396 if (htab
->plt_got_eh_frame
== NULL
2397 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2398 htab
->plt_got_eh_frame
,
2404 if (r_type
== R_386_GOT32X
2405 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2406 sec
->need_convert_load
= 1;
2409 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2411 if (!info
->keep_memory
)
2415 /* Cache the section contents for elf_link_input_bfd. */
2416 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2423 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2425 sec
->check_relocs_failed
= 1;
2429 /* Return the section that should be marked against GC for a given
2433 elf_i386_gc_mark_hook (asection
*sec
,
2434 struct bfd_link_info
*info
,
2435 Elf_Internal_Rela
*rel
,
2436 struct elf_link_hash_entry
*h
,
2437 Elf_Internal_Sym
*sym
)
2440 switch (ELF32_R_TYPE (rel
->r_info
))
2442 case R_386_GNU_VTINHERIT
:
2443 case R_386_GNU_VTENTRY
:
2447 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2450 /* Remove undefined weak symbol from the dynamic symbol table if it
2451 is resolved to 0. */
2454 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2455 struct elf_link_hash_entry
*h
)
2457 if (h
->dynindx
!= -1
2458 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2459 elf_i386_hash_entry (h
)->has_got_reloc
,
2460 elf_i386_hash_entry (h
)))
2463 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2469 /* Adjust a symbol defined by a dynamic object and referenced by a
2470 regular object. The current definition is in some section of the
2471 dynamic object, but we're not including those sections. We have to
2472 change the definition to something the rest of the link can
2476 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2477 struct elf_link_hash_entry
*h
)
2479 struct elf_i386_link_hash_table
*htab
;
2481 struct elf_i386_link_hash_entry
*eh
;
2482 struct elf_dyn_relocs
*p
;
2484 /* STT_GNU_IFUNC symbol must go through PLT. */
2485 if (h
->type
== STT_GNU_IFUNC
)
2487 /* All local STT_GNU_IFUNC references must be treate as local
2488 calls via local PLT. */
2490 && SYMBOL_CALLS_LOCAL (info
, h
))
2492 bfd_size_type pc_count
= 0, count
= 0;
2493 struct elf_dyn_relocs
**pp
;
2495 eh
= (struct elf_i386_link_hash_entry
*) h
;
2496 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2498 pc_count
+= p
->pc_count
;
2499 p
->count
-= p
->pc_count
;
2508 if (pc_count
|| count
)
2513 /* Increment PLT reference count only for PC-relative
2516 if (h
->plt
.refcount
<= 0)
2517 h
->plt
.refcount
= 1;
2519 h
->plt
.refcount
+= 1;
2524 if (h
->plt
.refcount
<= 0)
2526 h
->plt
.offset
= (bfd_vma
) -1;
2532 /* If this is a function, put it in the procedure linkage table. We
2533 will fill in the contents of the procedure linkage table later,
2534 when we know the address of the .got section. */
2535 if (h
->type
== STT_FUNC
2538 if (h
->plt
.refcount
<= 0
2539 || SYMBOL_CALLS_LOCAL (info
, h
)
2540 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2541 && h
->root
.type
== bfd_link_hash_undefweak
))
2543 /* This case can occur if we saw a PLT32 reloc in an input
2544 file, but the symbol was never referred to by a dynamic
2545 object, or if all references were garbage collected. In
2546 such a case, we don't actually need to build a procedure
2547 linkage table, and we can just do a PC32 reloc instead. */
2548 h
->plt
.offset
= (bfd_vma
) -1;
2555 /* It's possible that we incorrectly decided a .plt reloc was
2556 needed for an R_386_PC32 reloc to a non-function sym in
2557 check_relocs. We can't decide accurately between function and
2558 non-function syms in check-relocs; Objects loaded later in
2559 the link may change h->type. So fix it now. */
2560 h
->plt
.offset
= (bfd_vma
) -1;
2562 /* If this is a weak symbol, and there is a real definition, the
2563 processor independent code will have arranged for us to see the
2564 real definition first, and we can just use the same value. */
2565 if (h
->u
.weakdef
!= NULL
)
2567 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2568 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2569 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2570 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2571 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2572 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2576 /* This is a reference to a symbol defined by a dynamic object which
2577 is not a function. */
2579 /* If we are creating a shared library, we must presume that the
2580 only references to the symbol are via the global offset table.
2581 For such cases we need not do anything here; the relocations will
2582 be handled correctly by relocate_section. */
2583 if (!bfd_link_executable (info
))
2586 /* If there are no references to this symbol that do not use the
2587 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2589 eh
= (struct elf_i386_link_hash_entry
*) h
;
2590 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2593 /* If -z nocopyreloc was given, we won't generate them either. */
2594 if (info
->nocopyreloc
)
2600 htab
= elf_i386_hash_table (info
);
2604 /* If there aren't any dynamic relocs in read-only sections nor
2605 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2606 avoid the copy reloc. This doesn't work on VxWorks, where we can
2607 not have dynamic relocations (other than copy and jump slot
2608 relocations) in an executable. */
2609 if (ELIMINATE_COPY_RELOCS
2611 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2613 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2615 s
= p
->sec
->output_section
;
2616 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2627 /* We must allocate the symbol in our .dynbss section, which will
2628 become part of the .bss section of the executable. There will be
2629 an entry for this symbol in the .dynsym section. The dynamic
2630 object will contain position independent code, so all references
2631 from the dynamic object to this symbol will go through the global
2632 offset table. The dynamic linker will use the .dynsym entry to
2633 determine the address it must put in the global offset table, so
2634 both the dynamic object and the regular object will refer to the
2635 same memory location for the variable. */
2637 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2638 copy the initial value out of the dynamic object and into the
2639 runtime process image. */
2640 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2642 s
= htab
->elf
.sdynrelro
;
2643 srel
= htab
->elf
.sreldynrelro
;
2647 s
= htab
->elf
.sdynbss
;
2648 srel
= htab
->elf
.srelbss
;
2650 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2652 srel
->size
+= sizeof (Elf32_External_Rel
);
2656 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2659 /* Allocate space in .plt, .got and associated reloc sections for
2663 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2665 struct bfd_link_info
*info
;
2666 struct elf_i386_link_hash_table
*htab
;
2667 struct elf_i386_link_hash_entry
*eh
;
2668 struct elf_dyn_relocs
*p
;
2669 unsigned plt_entry_size
;
2670 bfd_boolean resolved_to_zero
;
2672 if (h
->root
.type
== bfd_link_hash_indirect
)
2675 eh
= (struct elf_i386_link_hash_entry
*) h
;
2677 info
= (struct bfd_link_info
*) inf
;
2678 htab
= elf_i386_hash_table (info
);
2682 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2684 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2688 /* Clear the reference count of function pointer relocations if
2689 symbol isn't a normal function. */
2690 if (h
->type
!= STT_FUNC
)
2691 eh
->func_pointer_refcount
= 0;
2693 /* We can't use the GOT PLT if pointer equality is needed since
2694 finish_dynamic_symbol won't clear symbol value and the dynamic
2695 linker won't update the GOT slot. We will get into an infinite
2696 loop at run-time. */
2697 if (htab
->plt_got
!= NULL
2698 && h
->type
!= STT_GNU_IFUNC
2699 && !h
->pointer_equality_needed
2700 && h
->plt
.refcount
> 0
2701 && h
->got
.refcount
> 0)
2703 /* Don't use the regular PLT if there are both GOT and GOTPLT
2705 h
->plt
.offset
= (bfd_vma
) -1;
2707 /* Use the GOT PLT. */
2708 eh
->plt_got
.refcount
= 1;
2711 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2712 here if it is defined and referenced in a non-shared object. */
2713 if (h
->type
== STT_GNU_IFUNC
2715 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2716 &htab
->readonly_dynrelocs_against_ifunc
,
2718 plt_entry_size
, 4, TRUE
);
2719 /* Don't create the PLT entry if there are only function pointer
2720 relocations which can be resolved at run-time. */
2721 else if (htab
->elf
.dynamic_sections_created
2722 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2723 || eh
->plt_got
.refcount
> 0))
2725 bfd_boolean use_plt_got
;
2727 /* Clear the reference count of function pointer relocations
2729 eh
->func_pointer_refcount
= 0;
2731 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2733 /* Don't use the regular PLT for DF_BIND_NOW. */
2734 h
->plt
.offset
= (bfd_vma
) -1;
2736 /* Use the GOT PLT. */
2737 h
->got
.refcount
= 1;
2738 eh
->plt_got
.refcount
= 1;
2741 use_plt_got
= eh
->plt_got
.refcount
> 0;
2743 /* Make sure this symbol is output as a dynamic symbol.
2744 Undefined weak syms won't yet be marked as dynamic. */
2745 if (h
->dynindx
== -1
2747 && !resolved_to_zero
)
2749 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2753 if (bfd_link_pic (info
)
2754 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2756 asection
*s
= htab
->elf
.splt
;
2757 asection
*got_s
= htab
->plt_got
;
2759 /* If this is the first .plt entry, make room for the special
2760 first entry. The .plt section is used by prelink to undo
2761 prelinking for dynamic relocations. */
2763 s
->size
= plt_entry_size
;
2766 eh
->plt_got
.offset
= got_s
->size
;
2768 h
->plt
.offset
= s
->size
;
2770 /* If this symbol is not defined in a regular file, and we are
2771 not generating a shared library, then set the symbol to this
2772 location in the .plt. This is required to make function
2773 pointers compare as equal between the normal executable and
2774 the shared library. */
2775 if (! bfd_link_pic (info
)
2780 /* We need to make a call to the entry of the GOT PLT
2781 instead of regular PLT entry. */
2782 h
->root
.u
.def
.section
= got_s
;
2783 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2787 h
->root
.u
.def
.section
= s
;
2788 h
->root
.u
.def
.value
= h
->plt
.offset
;
2792 /* Make room for this entry. */
2794 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2797 s
->size
+= plt_entry_size
;
2799 /* We also need to make an entry in the .got.plt section,
2800 which will be placed in the .got section by the linker
2802 htab
->elf
.sgotplt
->size
+= 4;
2804 /* There should be no PLT relocation against resolved
2805 undefined weak symbol in executable. */
2806 if (!resolved_to_zero
)
2808 /* We also need to make an entry in the .rel.plt
2810 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2811 htab
->elf
.srelplt
->reloc_count
++;
2815 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2816 && !bfd_link_pic (info
))
2818 /* VxWorks has a second set of relocations for each PLT entry
2819 in executables. They go in a separate relocation section,
2820 which is processed by the kernel loader. */
2822 /* There are two relocations for the initial PLT entry: an
2823 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2824 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2826 if (h
->plt
.offset
== plt_entry_size
)
2827 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2829 /* There are two extra relocations for each subsequent PLT entry:
2830 an R_386_32 relocation for the GOT entry, and an R_386_32
2831 relocation for the PLT entry. */
2833 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2838 eh
->plt_got
.offset
= (bfd_vma
) -1;
2839 h
->plt
.offset
= (bfd_vma
) -1;
2845 eh
->plt_got
.offset
= (bfd_vma
) -1;
2846 h
->plt
.offset
= (bfd_vma
) -1;
2850 eh
->tlsdesc_got
= (bfd_vma
) -1;
2852 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2853 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2854 if (h
->got
.refcount
> 0
2855 && bfd_link_executable (info
)
2857 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2858 h
->got
.offset
= (bfd_vma
) -1;
2859 else if (h
->got
.refcount
> 0)
2863 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2865 /* Make sure this symbol is output as a dynamic symbol.
2866 Undefined weak syms won't yet be marked as dynamic. */
2867 if (h
->dynindx
== -1
2869 && !resolved_to_zero
)
2871 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2876 if (GOT_TLS_GDESC_P (tls_type
))
2878 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2879 - elf_i386_compute_jump_table_size (htab
);
2880 htab
->elf
.sgotplt
->size
+= 8;
2881 h
->got
.offset
= (bfd_vma
) -2;
2883 if (! GOT_TLS_GDESC_P (tls_type
)
2884 || GOT_TLS_GD_P (tls_type
))
2886 h
->got
.offset
= s
->size
;
2888 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2889 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2892 dyn
= htab
->elf
.dynamic_sections_created
;
2893 /* R_386_TLS_IE_32 needs one dynamic relocation,
2894 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2895 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2896 need two), R_386_TLS_GD needs one if local symbol and two if
2897 global. No dynamic relocation against resolved undefined weak
2898 symbol in executable. */
2899 if (tls_type
== GOT_TLS_IE_BOTH
)
2900 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2901 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2902 || (tls_type
& GOT_TLS_IE
))
2903 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2904 else if (GOT_TLS_GD_P (tls_type
))
2905 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2906 else if (! GOT_TLS_GDESC_P (tls_type
)
2907 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2908 && !resolved_to_zero
)
2909 || h
->root
.type
!= bfd_link_hash_undefweak
)
2910 && (bfd_link_pic (info
)
2911 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2912 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2913 if (GOT_TLS_GDESC_P (tls_type
))
2914 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2917 h
->got
.offset
= (bfd_vma
) -1;
2919 if (eh
->dyn_relocs
== NULL
)
2922 /* In the shared -Bsymbolic case, discard space allocated for
2923 dynamic pc-relative relocs against symbols which turn out to be
2924 defined in regular objects. For the normal shared case, discard
2925 space for pc-relative relocs that have become local due to symbol
2926 visibility changes. */
2928 if (bfd_link_pic (info
))
2930 /* The only reloc that uses pc_count is R_386_PC32, which will
2931 appear on a call or on something like ".long foo - .". We
2932 want calls to protected symbols to resolve directly to the
2933 function rather than going via the plt. If people want
2934 function pointer comparisons to work as expected then they
2935 should avoid writing assembly like ".long foo - .". */
2936 if (SYMBOL_CALLS_LOCAL (info
, h
))
2938 struct elf_dyn_relocs
**pp
;
2940 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2942 p
->count
-= p
->pc_count
;
2951 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2953 struct elf_dyn_relocs
**pp
;
2954 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2956 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2963 /* Also discard relocs on undefined weak syms with non-default
2964 visibility or in PIE. */
2965 if (eh
->dyn_relocs
!= NULL
2966 && h
->root
.type
== bfd_link_hash_undefweak
)
2968 /* Undefined weak symbol is never bound locally in shared
2970 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2971 || resolved_to_zero
)
2975 /* Keep dynamic non-GOT/non-PLT relocation so that we
2976 can branch to 0 without PLT. */
2977 struct elf_dyn_relocs
**pp
;
2979 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2980 if (p
->pc_count
== 0)
2984 /* Remove non-R_386_PC32 relocation. */
2985 p
->count
= p
->pc_count
;
2989 if (eh
->dyn_relocs
!= NULL
)
2991 /* Make sure undefined weak symbols are output
2992 as dynamic symbols in PIEs for dynamic non-GOT
2993 non-PLT reloations. */
2994 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2999 eh
->dyn_relocs
= NULL
;
3001 else if (h
->dynindx
== -1
3002 && !h
->forced_local
)
3004 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3009 else if (ELIMINATE_COPY_RELOCS
)
3011 /* For the non-shared case, discard space for relocs against
3012 symbols which turn out to need copy relocs or are not
3013 dynamic. Keep dynamic relocations for run-time function
3014 pointer initialization. */
3016 if ((!h
->non_got_ref
3017 || eh
->func_pointer_refcount
> 0
3018 || (h
->root
.type
== bfd_link_hash_undefweak
3019 && !resolved_to_zero
))
3022 || (htab
->elf
.dynamic_sections_created
3023 && (h
->root
.type
== bfd_link_hash_undefweak
3024 || h
->root
.type
== bfd_link_hash_undefined
))))
3026 /* Make sure this symbol is output as a dynamic symbol.
3027 Undefined weak syms won't yet be marked as dynamic. */
3028 if (h
->dynindx
== -1
3030 && !resolved_to_zero
)
3032 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3036 /* If that succeeded, we know we'll be keeping all the
3038 if (h
->dynindx
!= -1)
3042 eh
->dyn_relocs
= NULL
;
3043 eh
->func_pointer_refcount
= 0;
3048 /* Finally, allocate space. */
3049 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3053 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3055 BFD_ASSERT (sreloc
!= NULL
);
3056 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3062 /* Allocate space in .plt, .got and associated reloc sections for
3063 local dynamic relocs. */
3066 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
3068 struct elf_link_hash_entry
*h
3069 = (struct elf_link_hash_entry
*) *slot
;
3071 if (h
->type
!= STT_GNU_IFUNC
3075 || h
->root
.type
!= bfd_link_hash_defined
)
3078 return elf_i386_allocate_dynrelocs (h
, inf
);
3081 /* Find any dynamic relocs that apply to read-only sections. */
3084 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
3086 struct elf_i386_link_hash_entry
*eh
;
3087 struct elf_dyn_relocs
*p
;
3089 /* Skip local IFUNC symbols. */
3090 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3093 eh
= (struct elf_i386_link_hash_entry
*) h
;
3094 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3096 asection
*s
= p
->sec
->output_section
;
3098 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3100 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3102 info
->flags
|= DF_TEXTREL
;
3104 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3105 || info
->error_textrel
)
3106 /* xgettext:c-format */
3107 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3108 p
->sec
->owner
, h
->root
.root
.string
,
3111 /* Not an error, just cut short the traversal. */
3118 /* Convert load via the GOT slot to load immediate. */
3121 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
3122 struct bfd_link_info
*link_info
)
3124 struct elf_i386_link_hash_table
*htab
;
3125 Elf_Internal_Shdr
*symtab_hdr
;
3126 Elf_Internal_Rela
*internal_relocs
;
3127 Elf_Internal_Rela
*irel
, *irelend
;
3129 bfd_boolean changed
;
3130 bfd_signed_vma
*local_got_refcounts
;
3132 /* Don't even try to convert non-ELF outputs. */
3133 if (!is_elf_hash_table (link_info
->hash
))
3136 /* Nothing to do if there is no need or no output. */
3137 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3138 || sec
->need_convert_load
== 0
3139 || bfd_is_abs_section (sec
->output_section
))
3142 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3144 /* Load the relocations for this section. */
3145 internal_relocs
= (_bfd_elf_link_read_relocs
3146 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3147 link_info
->keep_memory
));
3148 if (internal_relocs
== NULL
)
3152 htab
= elf_i386_hash_table (link_info
);
3153 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3155 /* Get the section contents. */
3156 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3157 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3160 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3164 irelend
= internal_relocs
+ sec
->reloc_count
;
3165 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3167 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3168 unsigned int r_symndx
;
3169 struct elf_link_hash_entry
*h
;
3170 bfd_boolean converted
;
3172 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3173 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3174 if (r_type
!= R_386_GOT32X
)
3177 r_symndx
= ELF32_R_SYM (irel
->r_info
);
3178 if (r_symndx
< symtab_hdr
->sh_info
)
3179 h
= elf_i386_get_local_sym_hash (htab
, sec
->owner
,
3180 (const Elf_Internal_Rela
*) irel
,
3184 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3185 while (h
->root
.type
== bfd_link_hash_indirect
3186 || h
->root
.type
== bfd_link_hash_warning
)
3187 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3190 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3191 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3195 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
3196 irel
, h
, &converted
, link_info
))
3201 changed
= converted
;
3204 if (h
->got
.refcount
> 0)
3205 h
->got
.refcount
-= 1;
3209 if (local_got_refcounts
!= NULL
3210 && local_got_refcounts
[r_symndx
] > 0)
3211 local_got_refcounts
[r_symndx
] -= 1;
3216 if (contents
!= NULL
3217 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3219 if (!changed
&& !link_info
->keep_memory
)
3223 /* Cache the section contents for elf_link_input_bfd. */
3224 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3228 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3231 free (internal_relocs
);
3233 elf_section_data (sec
)->relocs
= internal_relocs
;
3239 if (contents
!= NULL
3240 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3242 if (internal_relocs
!= NULL
3243 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3244 free (internal_relocs
);
3248 /* Set the sizes of the dynamic sections. */
3251 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3253 struct elf_i386_link_hash_table
*htab
;
3259 htab
= elf_i386_hash_table (info
);
3262 dynobj
= htab
->elf
.dynobj
;
3266 /* Set up .got offsets for local syms, and space for local dynamic
3268 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3270 bfd_signed_vma
*local_got
;
3271 bfd_signed_vma
*end_local_got
;
3272 char *local_tls_type
;
3273 bfd_vma
*local_tlsdesc_gotent
;
3274 bfd_size_type locsymcount
;
3275 Elf_Internal_Shdr
*symtab_hdr
;
3278 if (! is_i386_elf (ibfd
))
3281 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3283 struct elf_dyn_relocs
*p
;
3285 if (!elf_i386_convert_load (ibfd
, s
, info
))
3288 for (p
= ((struct elf_dyn_relocs
*)
3289 elf_section_data (s
)->local_dynrel
);
3293 if (!bfd_is_abs_section (p
->sec
)
3294 && bfd_is_abs_section (p
->sec
->output_section
))
3296 /* Input section has been discarded, either because
3297 it is a copy of a linkonce section or due to
3298 linker script /DISCARD/, so we'll be discarding
3301 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3302 && strcmp (p
->sec
->output_section
->name
,
3305 /* Relocations in vxworks .tls_vars sections are
3306 handled specially by the loader. */
3308 else if (p
->count
!= 0)
3310 srel
= elf_section_data (p
->sec
)->sreloc
;
3311 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3312 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3313 && (info
->flags
& DF_TEXTREL
) == 0)
3315 info
->flags
|= DF_TEXTREL
;
3316 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3317 || info
->error_textrel
)
3318 /* xgettext:c-format */
3319 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3320 p
->sec
->owner
, p
->sec
);
3326 local_got
= elf_local_got_refcounts (ibfd
);
3330 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3331 locsymcount
= symtab_hdr
->sh_info
;
3332 end_local_got
= local_got
+ locsymcount
;
3333 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3334 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3336 srel
= htab
->elf
.srelgot
;
3337 for (; local_got
< end_local_got
;
3338 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3340 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3343 if (GOT_TLS_GDESC_P (*local_tls_type
))
3345 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3346 - elf_i386_compute_jump_table_size (htab
);
3347 htab
->elf
.sgotplt
->size
+= 8;
3348 *local_got
= (bfd_vma
) -2;
3350 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3351 || GOT_TLS_GD_P (*local_tls_type
))
3353 *local_got
= s
->size
;
3355 if (GOT_TLS_GD_P (*local_tls_type
)
3356 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3359 if (bfd_link_pic (info
)
3360 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3361 || (*local_tls_type
& GOT_TLS_IE
))
3363 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3364 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3365 else if (GOT_TLS_GD_P (*local_tls_type
)
3366 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3367 srel
->size
+= sizeof (Elf32_External_Rel
);
3368 if (GOT_TLS_GDESC_P (*local_tls_type
))
3369 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3373 *local_got
= (bfd_vma
) -1;
3377 if (htab
->tls_ldm_got
.refcount
> 0)
3379 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3381 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3382 htab
->elf
.sgot
->size
+= 8;
3383 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3386 htab
->tls_ldm_got
.offset
= -1;
3388 /* Allocate global sym .plt and .got entries, and space for global
3389 sym dynamic relocs. */
3390 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3392 /* Allocate .plt and .got entries, and space for local symbols. */
3393 htab_traverse (htab
->loc_hash_table
,
3394 elf_i386_allocate_local_dynrelocs
,
3397 /* For every jump slot reserved in the sgotplt, reloc_count is
3398 incremented. However, when we reserve space for TLS descriptors,
3399 it's not incremented, so in order to compute the space reserved
3400 for them, it suffices to multiply the reloc count by the jump
3403 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3404 so that R_386_IRELATIVE entries come last. */
3405 if (htab
->elf
.srelplt
)
3407 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3408 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3409 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3411 else if (htab
->elf
.irelplt
)
3412 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3415 if (htab
->elf
.sgotplt
)
3417 /* Don't allocate .got.plt section if there are no GOT nor PLT
3418 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3419 if ((htab
->elf
.hgot
== NULL
3420 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3421 && (htab
->elf
.sgotplt
->size
3422 == get_elf_backend_data (output_bfd
)->got_header_size
)
3423 && (htab
->elf
.splt
== NULL
3424 || htab
->elf
.splt
->size
== 0)
3425 && (htab
->elf
.sgot
== NULL
3426 || htab
->elf
.sgot
->size
== 0)
3427 && (htab
->elf
.iplt
== NULL
3428 || htab
->elf
.iplt
->size
== 0)
3429 && (htab
->elf
.igotplt
== NULL
3430 || htab
->elf
.igotplt
->size
== 0))
3431 htab
->elf
.sgotplt
->size
= 0;
3434 if (_bfd_elf_eh_frame_present (info
))
3436 if (htab
->plt_eh_frame
!= NULL
3437 && htab
->elf
.splt
!= NULL
3438 && htab
->elf
.splt
->size
!= 0
3439 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3440 htab
->plt_eh_frame
->size
3441 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_size
;
3443 if (htab
->plt_got_eh_frame
!= NULL
3444 && htab
->plt_got
!= NULL
3445 && htab
->plt_got
->size
!= 0
3446 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3447 htab
->plt_got_eh_frame
->size
3448 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got_size
;
3451 /* We now have determined the sizes of the various dynamic sections.
3452 Allocate memory for them. */
3454 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3456 bfd_boolean strip_section
= TRUE
;
3458 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3461 if (s
== htab
->elf
.splt
3462 || s
== htab
->elf
.sgot
)
3464 /* Strip this section if we don't need it; see the
3466 /* We'd like to strip these sections if they aren't needed, but if
3467 we've exported dynamic symbols from them we must leave them.
3468 It's too late to tell BFD to get rid of the symbols. */
3470 if (htab
->elf
.hplt
!= NULL
)
3471 strip_section
= FALSE
;
3473 else if (s
== htab
->elf
.sgotplt
3474 || s
== htab
->elf
.iplt
3475 || s
== htab
->elf
.igotplt
3476 || s
== htab
->plt_got
3477 || s
== htab
->plt_eh_frame
3478 || s
== htab
->plt_got_eh_frame
3479 || s
== htab
->elf
.sdynbss
3480 || s
== htab
->elf
.sdynrelro
)
3482 /* Strip these too. */
3484 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3487 && s
!= htab
->elf
.srelplt
3488 && s
!= htab
->srelplt2
)
3491 /* We use the reloc_count field as a counter if we need
3492 to copy relocs into the output file. */
3497 /* It's not one of our sections, so don't allocate space. */
3503 /* If we don't need this section, strip it from the
3504 output file. This is mostly to handle .rel.bss and
3505 .rel.plt. We must create both sections in
3506 create_dynamic_sections, because they must be created
3507 before the linker maps input sections to output
3508 sections. The linker does that before
3509 adjust_dynamic_symbol is called, and it is that
3510 function which decides whether anything needs to go
3511 into these sections. */
3513 s
->flags
|= SEC_EXCLUDE
;
3517 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3520 /* Allocate memory for the section contents. We use bfd_zalloc
3521 here in case unused entries are not reclaimed before the
3522 section's contents are written out. This should not happen,
3523 but this way if it does, we get a R_386_NONE reloc instead
3525 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3526 if (s
->contents
== NULL
)
3530 if (htab
->plt_eh_frame
!= NULL
3531 && htab
->plt_eh_frame
->contents
!= NULL
)
3533 memcpy (htab
->plt_eh_frame
->contents
,
3534 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt
,
3535 htab
->plt_eh_frame
->size
);
3536 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3537 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3540 if (htab
->plt_got_eh_frame
!= NULL
3541 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3543 memcpy (htab
->plt_got_eh_frame
->contents
,
3544 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got
,
3545 htab
->plt_got_eh_frame
->size
);
3546 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3547 (htab
->plt_got_eh_frame
->contents
3548 + PLT_FDE_LEN_OFFSET
));
3551 if (htab
->elf
.dynamic_sections_created
)
3553 /* Add some entries to the .dynamic section. We fill in the
3554 values later, in elf_i386_finish_dynamic_sections, but we
3555 must add the entries now so that we get the correct size for
3556 the .dynamic section. The DT_DEBUG entry is filled in by the
3557 dynamic linker and used by the debugger. */
3558 #define add_dynamic_entry(TAG, VAL) \
3559 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3561 if (bfd_link_executable (info
))
3563 if (!add_dynamic_entry (DT_DEBUG
, 0))
3567 if (htab
->elf
.splt
->size
!= 0)
3569 /* DT_PLTGOT is used by prelink even if there is no PLT
3571 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3574 if (htab
->elf
.srelplt
->size
!= 0)
3576 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3577 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3578 || !add_dynamic_entry (DT_JMPREL
, 0))
3585 if (!add_dynamic_entry (DT_REL
, 0)
3586 || !add_dynamic_entry (DT_RELSZ
, 0)
3587 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3590 /* If any dynamic relocs apply to a read-only section,
3591 then we need a DT_TEXTREL entry. */
3592 if ((info
->flags
& DF_TEXTREL
) == 0)
3593 elf_link_hash_traverse (&htab
->elf
,
3594 elf_i386_readonly_dynrelocs
, info
);
3596 if ((info
->flags
& DF_TEXTREL
) != 0)
3598 if (htab
->readonly_dynrelocs_against_ifunc
)
3600 info
->callbacks
->einfo
3601 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3602 bfd_set_error (bfd_error_bad_value
);
3606 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3610 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3611 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3614 #undef add_dynamic_entry
3620 elf_i386_always_size_sections (bfd
*output_bfd
,
3621 struct bfd_link_info
*info
)
3623 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3627 struct elf_link_hash_entry
*tlsbase
;
3629 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3630 "_TLS_MODULE_BASE_",
3631 FALSE
, FALSE
, FALSE
);
3633 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3635 struct elf_i386_link_hash_table
*htab
;
3636 struct bfd_link_hash_entry
*bh
= NULL
;
3637 const struct elf_backend_data
*bed
3638 = get_elf_backend_data (output_bfd
);
3640 htab
= elf_i386_hash_table (info
);
3644 if (!(_bfd_generic_link_add_one_symbol
3645 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3646 tls_sec
, 0, NULL
, FALSE
,
3647 bed
->collect
, &bh
)))
3650 htab
->tls_module_base
= bh
;
3652 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3653 tlsbase
->def_regular
= 1;
3654 tlsbase
->other
= STV_HIDDEN
;
3655 tlsbase
->root
.linker_def
= 1;
3656 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3663 /* Set the correct type for an x86 ELF section. We do this by the
3664 section name, which is a hack, but ought to work. */
3667 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3668 Elf_Internal_Shdr
*hdr
,
3673 name
= bfd_get_section_name (abfd
, sec
);
3675 /* This is an ugly, but unfortunately necessary hack that is
3676 needed when producing EFI binaries on x86. It tells
3677 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3678 containing ELF relocation info. We need this hack in order to
3679 be able to generate ELF binaries that can be translated into
3680 EFI applications (which are essentially COFF objects). Those
3681 files contain a COFF ".reloc" section inside an ELFNN object,
3682 which would normally cause BFD to segfault because it would
3683 attempt to interpret this section as containing relocation
3684 entries for section "oc". With this hack enabled, ".reloc"
3685 will be treated as a normal data section, which will avoid the
3686 segfault. However, you won't be able to create an ELFNN binary
3687 with a section named "oc" that needs relocations, but that's
3688 the kind of ugly side-effects you get when detecting section
3689 types based on their names... In practice, this limitation is
3690 unlikely to bite. */
3691 if (strcmp (name
, ".reloc") == 0)
3692 hdr
->sh_type
= SHT_PROGBITS
;
3697 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3698 executables. Rather than setting it to the beginning of the TLS
3699 section, we have to set it to the end. This function may be called
3700 multiple times, it is idempotent. */
3703 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3705 struct elf_i386_link_hash_table
*htab
;
3706 struct bfd_link_hash_entry
*base
;
3708 if (!bfd_link_executable (info
))
3711 htab
= elf_i386_hash_table (info
);
3715 base
= htab
->tls_module_base
;
3719 base
->u
.def
.value
= htab
->elf
.tls_size
;
3722 /* Return the base VMA address which should be subtracted from real addresses
3723 when resolving @dtpoff relocation.
3724 This is PT_TLS segment p_vaddr. */
3727 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3729 /* If tls_sec is NULL, we should have signalled an error already. */
3730 if (elf_hash_table (info
)->tls_sec
== NULL
)
3732 return elf_hash_table (info
)->tls_sec
->vma
;
3735 /* Return the relocation value for @tpoff relocation
3736 if STT_TLS virtual address is ADDRESS. */
3739 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3741 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3742 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3743 bfd_vma static_tls_size
;
3745 /* If tls_sec is NULL, we should have signalled an error already. */
3746 if (htab
->tls_sec
== NULL
)
3749 /* Consider special static TLS alignment requirements. */
3750 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3751 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3754 /* Relocate an i386 ELF section. */
3757 elf_i386_relocate_section (bfd
*output_bfd
,
3758 struct bfd_link_info
*info
,
3760 asection
*input_section
,
3762 Elf_Internal_Rela
*relocs
,
3763 Elf_Internal_Sym
*local_syms
,
3764 asection
**local_sections
)
3766 struct elf_i386_link_hash_table
*htab
;
3767 Elf_Internal_Shdr
*symtab_hdr
;
3768 struct elf_link_hash_entry
**sym_hashes
;
3769 bfd_vma
*local_got_offsets
;
3770 bfd_vma
*local_tlsdesc_gotents
;
3771 Elf_Internal_Rela
*rel
;
3772 Elf_Internal_Rela
*wrel
;
3773 Elf_Internal_Rela
*relend
;
3774 bfd_boolean is_vxworks_tls
;
3775 unsigned plt_entry_size
;
3777 BFD_ASSERT (is_i386_elf (input_bfd
));
3779 /* Skip if check_relocs failed. */
3780 if (input_section
->check_relocs_failed
)
3783 htab
= elf_i386_hash_table (info
);
3786 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3787 sym_hashes
= elf_sym_hashes (input_bfd
);
3788 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3789 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3790 /* We have to handle relocations in vxworks .tls_vars sections
3791 specially, because the dynamic loader is 'weird'. */
3792 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3793 && bfd_link_pic (info
)
3794 && !strcmp (input_section
->output_section
->name
,
3797 elf_i386_set_tls_module_base (info
);
3799 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3801 rel
= wrel
= relocs
;
3802 relend
= relocs
+ input_section
->reloc_count
;
3803 for (; rel
< relend
; wrel
++, rel
++)
3805 unsigned int r_type
;
3806 reloc_howto_type
*howto
;
3807 unsigned long r_symndx
;
3808 struct elf_link_hash_entry
*h
;
3809 struct elf_i386_link_hash_entry
*eh
;
3810 Elf_Internal_Sym
*sym
;
3812 bfd_vma off
, offplt
, plt_offset
;
3814 bfd_boolean unresolved_reloc
;
3815 bfd_reloc_status_type r
;
3819 asection
*resolved_plt
;
3820 bfd_boolean resolved_to_zero
;
3822 r_type
= ELF32_R_TYPE (rel
->r_info
);
3823 if (r_type
== R_386_GNU_VTINHERIT
3824 || r_type
== R_386_GNU_VTENTRY
)
3831 if ((indx
= r_type
) >= R_386_standard
3832 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3833 >= R_386_ext
- R_386_standard
)
3834 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3835 >= R_386_ext2
- R_386_ext
))
3838 /* xgettext:c-format */
3839 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3840 input_bfd
, r_type
, input_section
);
3841 bfd_set_error (bfd_error_bad_value
);
3844 howto
= elf_howto_table
+ indx
;
3846 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3850 unresolved_reloc
= FALSE
;
3851 if (r_symndx
< symtab_hdr
->sh_info
)
3853 sym
= local_syms
+ r_symndx
;
3854 sec
= local_sections
[r_symndx
];
3855 relocation
= (sec
->output_section
->vma
3856 + sec
->output_offset
3858 st_size
= sym
->st_size
;
3860 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3861 && ((sec
->flags
& SEC_MERGE
) != 0
3862 || (bfd_link_relocatable (info
)
3863 && sec
->output_offset
!= 0)))
3866 bfd_byte
*where
= contents
+ rel
->r_offset
;
3868 switch (howto
->size
)
3871 addend
= bfd_get_8 (input_bfd
, where
);
3872 if (howto
->pc_relative
)
3874 addend
= (addend
^ 0x80) - 0x80;
3879 addend
= bfd_get_16 (input_bfd
, where
);
3880 if (howto
->pc_relative
)
3882 addend
= (addend
^ 0x8000) - 0x8000;
3887 addend
= bfd_get_32 (input_bfd
, where
);
3888 if (howto
->pc_relative
)
3890 addend
= (addend
^ 0x80000000) - 0x80000000;
3898 if (bfd_link_relocatable (info
))
3899 addend
+= sec
->output_offset
;
3902 asection
*msec
= sec
;
3903 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3905 addend
-= relocation
;
3906 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3909 switch (howto
->size
)
3912 /* FIXME: overflow checks. */
3913 if (howto
->pc_relative
)
3915 bfd_put_8 (input_bfd
, addend
, where
);
3918 if (howto
->pc_relative
)
3920 bfd_put_16 (input_bfd
, addend
, where
);
3923 if (howto
->pc_relative
)
3925 bfd_put_32 (input_bfd
, addend
, where
);
3929 else if (!bfd_link_relocatable (info
)
3930 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3932 /* Relocate against local STT_GNU_IFUNC symbol. */
3933 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3938 /* Set STT_GNU_IFUNC symbol value. */
3939 h
->root
.u
.def
.value
= sym
->st_value
;
3940 h
->root
.u
.def
.section
= sec
;
3945 bfd_boolean warned ATTRIBUTE_UNUSED
;
3946 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3948 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3949 r_symndx
, symtab_hdr
, sym_hashes
,
3951 unresolved_reloc
, warned
, ignored
);
3955 if (sec
!= NULL
&& discarded_section (sec
))
3957 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3958 contents
+ rel
->r_offset
);
3959 wrel
->r_offset
= rel
->r_offset
;
3963 /* For ld -r, remove relocations in debug sections against
3964 sections defined in discarded sections. Not done for
3965 eh_frame editing code expects to be present. */
3966 if (bfd_link_relocatable (info
)
3967 && (input_section
->flags
& SEC_DEBUGGING
))
3973 if (bfd_link_relocatable (info
))
3980 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3981 it here if it is defined in a non-shared object. */
3983 && h
->type
== STT_GNU_IFUNC
3986 asection
*plt
, *gotplt
, *base_got
;
3990 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3992 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3993 sections because such sections are not SEC_ALLOC and
3994 thus ld.so will not process them. */
3995 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
4000 /* STT_GNU_IFUNC symbol must go through PLT. */
4001 if (htab
->elf
.splt
!= NULL
)
4003 plt
= htab
->elf
.splt
;
4004 gotplt
= htab
->elf
.sgotplt
;
4008 plt
= htab
->elf
.iplt
;
4009 gotplt
= htab
->elf
.igotplt
;
4019 base_got
= htab
->elf
.sgot
;
4020 off
= h
->got
.offset
;
4022 if (base_got
== NULL
)
4025 if (off
== (bfd_vma
) -1)
4027 /* We can't use h->got.offset here to save state, or
4028 even just remember the offset, as finish_dynamic_symbol
4029 would use that as offset into .got. */
4031 if (h
->plt
.offset
== (bfd_vma
) -1)
4034 if (htab
->elf
.splt
!= NULL
)
4036 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
4037 off
= (plt_index
+ 3) * 4;
4038 base_got
= htab
->elf
.sgotplt
;
4042 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4043 off
= plt_index
* 4;
4044 base_got
= htab
->elf
.igotplt
;
4047 if (h
->dynindx
== -1
4051 /* This references the local defitionion. We must
4052 initialize this entry in the global offset table.
4053 Since the offset must always be a multiple of 8,
4054 we use the least significant bit to record
4055 whether we have initialized it already.
4057 When doing a dynamic link, we create a .rela.got
4058 relocation entry to initialize the value. This
4059 is done in the finish_dynamic_symbol routine. */
4064 bfd_put_32 (output_bfd
, relocation
,
4065 base_got
->contents
+ off
);
4073 relocation
= (base_got
->output_section
->vma
4074 + base_got
->output_offset
+ off
4075 - gotplt
->output_section
->vma
4076 - gotplt
->output_offset
);
4078 if (rel
->r_offset
> 1
4079 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4080 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4082 if (bfd_link_pic (info
))
4083 goto disallow_got32
;
4085 /* Add the GOT base if there is no base register. */
4086 relocation
+= (gotplt
->output_section
->vma
4087 + gotplt
->output_offset
);
4089 else if (htab
->elf
.splt
== NULL
)
4091 /* Adjust for static executables. */
4092 relocation
+= gotplt
->output_offset
;
4098 if (h
->plt
.offset
== (bfd_vma
) -1)
4100 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4101 if (r_type
== R_386_32
4102 && (input_section
->flags
& SEC_CODE
) == 0)
4103 goto do_ifunc_pointer
;
4104 goto bad_ifunc_reloc
;
4107 relocation
= (plt
->output_section
->vma
4108 + plt
->output_offset
+ h
->plt
.offset
);
4114 if (h
->root
.root
.string
)
4115 name
= h
->root
.root
.string
;
4117 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4120 /* xgettext:c-format */
4121 (_("%B: relocation %s against STT_GNU_IFUNC "
4122 "symbol `%s' isn't supported"), input_bfd
,
4124 bfd_set_error (bfd_error_bad_value
);
4128 /* Generate dynamic relcoation only when there is a
4129 non-GOT reference in a shared object. */
4130 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4131 || h
->plt
.offset
== (bfd_vma
) -1)
4133 Elf_Internal_Rela outrel
;
4138 /* Need a dynamic relocation to get the real function
4140 offset
= _bfd_elf_section_offset (output_bfd
,
4144 if (offset
== (bfd_vma
) -1
4145 || offset
== (bfd_vma
) -2)
4148 outrel
.r_offset
= (input_section
->output_section
->vma
4149 + input_section
->output_offset
4152 if (h
->dynindx
== -1
4154 || bfd_link_executable (info
))
4156 /* This symbol is resolved locally. */
4157 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4158 bfd_put_32 (output_bfd
,
4159 (h
->root
.u
.def
.value
4160 + h
->root
.u
.def
.section
->output_section
->vma
4161 + h
->root
.u
.def
.section
->output_offset
),
4165 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4167 /* Dynamic relocations are stored in
4168 1. .rel.ifunc section in PIC object.
4169 2. .rel.got section in dynamic executable.
4170 3. .rel.iplt section in static executable. */
4171 if (bfd_link_pic (info
))
4172 sreloc
= htab
->elf
.irelifunc
;
4173 else if (htab
->elf
.splt
!= NULL
)
4174 sreloc
= htab
->elf
.srelgot
;
4176 sreloc
= htab
->elf
.irelplt
;
4177 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4179 /* If this reloc is against an external symbol, we
4180 do not want to fiddle with the addend. Otherwise,
4181 we need to include the symbol value so that it
4182 becomes an addend for the dynamic reloc. For an
4183 internal symbol, we have updated addend. */
4192 relocation
-= (gotplt
->output_section
->vma
4193 + gotplt
->output_offset
);
4198 eh
= (struct elf_i386_link_hash_entry
*) h
;
4199 resolved_to_zero
= (eh
!= NULL
4200 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4207 /* Avoid optimizing _DYNAMIC since ld.so may use its
4208 link-time address. */
4209 if (h
== htab
->elf
.hdynamic
)
4212 if (bfd_link_pic (info
))
4214 /* It is OK to convert mov to lea and convert indirect
4215 branch to direct branch. It is OK to convert adc,
4216 add, and, cmp, or, sbb, sub, test, xor only when PIC
4218 unsigned int opcode
, addend
;
4219 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4222 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4223 if (opcode
!= 0x8b && opcode
!= 0xff)
4227 /* Resolve "mov GOT[(%reg)], %reg",
4228 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4229 and "binop foo@GOT[(%reg)], %reg". */
4231 || (h
->plt
.offset
== (bfd_vma
) -1
4232 && h
->got
.offset
== (bfd_vma
) -1)
4233 || htab
->elf
.sgotplt
== NULL
)
4236 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4237 + htab
->elf
.sgotplt
->output_offset
);
4239 /* It is relative to .got.plt section. */
4240 if (h
->got
.offset
!= (bfd_vma
) -1)
4241 /* Use GOT entry. Mask off the least significant bit in
4242 GOT offset which may be set by R_386_GOT32 processing
4244 relocation
= (htab
->elf
.sgot
->output_section
->vma
4245 + htab
->elf
.sgot
->output_offset
4246 + (h
->got
.offset
& ~1) - offplt
);
4248 /* Use GOTPLT entry. */
4249 relocation
= (h
->plt
.offset
/ plt_entry_size
- 1 + 3) * 4;
4251 if (!bfd_link_pic (info
))
4253 /* If not PIC, add the .got.plt section address for
4254 baseless addressing. */
4256 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4257 if ((modrm
& 0xc7) == 0x5)
4258 relocation
+= offplt
;
4261 unresolved_reloc
= FALSE
;
4266 /* Relocation is to the entry for this symbol in the global
4268 if (htab
->elf
.sgot
== NULL
)
4275 off
= h
->got
.offset
;
4276 dyn
= htab
->elf
.dynamic_sections_created
;
4277 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4278 bfd_link_pic (info
),
4280 || (bfd_link_pic (info
)
4281 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4282 || (ELF_ST_VISIBILITY (h
->other
)
4283 && h
->root
.type
== bfd_link_hash_undefweak
))
4285 /* This is actually a static link, or it is a
4286 -Bsymbolic link and the symbol is defined
4287 locally, or the symbol was forced to be local
4288 because of a version file. We must initialize
4289 this entry in the global offset table. Since the
4290 offset must always be a multiple of 4, we use the
4291 least significant bit to record whether we have
4292 initialized it already.
4294 When doing a dynamic link, we create a .rel.got
4295 relocation entry to initialize the value. This
4296 is done in the finish_dynamic_symbol routine. */
4301 bfd_put_32 (output_bfd
, relocation
,
4302 htab
->elf
.sgot
->contents
+ off
);
4307 unresolved_reloc
= FALSE
;
4311 if (local_got_offsets
== NULL
)
4314 off
= local_got_offsets
[r_symndx
];
4316 /* The offset must always be a multiple of 4. We use
4317 the least significant bit to record whether we have
4318 already generated the necessary reloc. */
4323 bfd_put_32 (output_bfd
, relocation
,
4324 htab
->elf
.sgot
->contents
+ off
);
4326 if (bfd_link_pic (info
))
4329 Elf_Internal_Rela outrel
;
4331 s
= htab
->elf
.srelgot
;
4335 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4336 + htab
->elf
.sgot
->output_offset
4338 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4339 elf_append_rel (output_bfd
, s
, &outrel
);
4342 local_got_offsets
[r_symndx
] |= 1;
4346 if (off
>= (bfd_vma
) -2)
4349 relocation
= (htab
->elf
.sgot
->output_section
->vma
4350 + htab
->elf
.sgot
->output_offset
+ off
);
4351 if (rel
->r_offset
> 1
4352 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4353 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4355 if (bfd_link_pic (info
))
4357 /* For PIC, disallow R_386_GOT32 without a base
4358 register, except for "lea foo@GOT, %reg", since
4359 we don't know what the GOT base is. */
4363 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
4364 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4367 name
= h
->root
.root
.string
;
4370 /* xgettext:c-format */
4371 (_("%B: direct GOT relocation %s against `%s'"
4372 " without base register can not be used"
4373 " when making a shared object"),
4374 input_bfd
, howto
->name
, name
);
4375 bfd_set_error (bfd_error_bad_value
);
4381 /* Subtract the .got.plt section address only with a base
4383 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
4384 + htab
->elf
.sgotplt
->output_offset
);
4390 /* Relocation is relative to the start of the global offset
4393 /* Check to make sure it isn't a protected function or data
4394 symbol for shared library since it may not be local when
4395 used as function address or with copy relocation. We also
4396 need to make sure that a symbol is referenced locally. */
4397 if (!bfd_link_executable (info
) && h
)
4399 if (!h
->def_regular
)
4403 switch (ELF_ST_VISIBILITY (h
->other
))
4406 v
= _("hidden symbol");
4409 v
= _("internal symbol");
4412 v
= _("protected symbol");
4420 /* xgettext:c-format */
4421 (_("%B: relocation R_386_GOTOFF against undefined %s"
4422 " `%s' can not be used when making a shared object"),
4423 input_bfd
, v
, h
->root
.root
.string
);
4424 bfd_set_error (bfd_error_bad_value
);
4427 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4428 && (h
->type
== STT_FUNC
4429 || h
->type
== STT_OBJECT
)
4430 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4433 /* xgettext:c-format */
4434 (_("%B: relocation R_386_GOTOFF against protected %s"
4435 " `%s' can not be used when making a shared object"),
4437 h
->type
== STT_FUNC
? "function" : "data",
4438 h
->root
.root
.string
);
4439 bfd_set_error (bfd_error_bad_value
);
4444 /* Note that sgot is not involved in this
4445 calculation. We always want the start of .got.plt. If we
4446 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4447 permitted by the ABI, we might have to change this
4449 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4450 + htab
->elf
.sgotplt
->output_offset
;
4454 /* Use global offset table as symbol value. */
4455 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4456 + htab
->elf
.sgotplt
->output_offset
;
4457 unresolved_reloc
= FALSE
;
4461 /* Relocation is to the entry for this symbol in the
4462 procedure linkage table. */
4464 /* Resolve a PLT32 reloc against a local symbol directly,
4465 without using the procedure linkage table. */
4469 if ((h
->plt
.offset
== (bfd_vma
) -1
4470 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4471 || htab
->elf
.splt
== NULL
)
4473 /* We didn't make a PLT entry for this symbol. This
4474 happens when statically linking PIC code, or when
4475 using -Bsymbolic. */
4479 if (h
->plt
.offset
!= (bfd_vma
) -1)
4481 resolved_plt
= htab
->elf
.splt
;
4482 plt_offset
= h
->plt
.offset
;
4486 resolved_plt
= htab
->plt_got
;
4487 plt_offset
= eh
->plt_got
.offset
;
4490 relocation
= (resolved_plt
->output_section
->vma
4491 + resolved_plt
->output_offset
4493 unresolved_reloc
= FALSE
;
4497 /* Set to symbol size. */
4498 relocation
= st_size
;
4503 if ((input_section
->flags
& SEC_ALLOC
) == 0
4507 /* Copy dynamic function pointer relocations. Don't generate
4508 dynamic relocations against resolved undefined weak symbols
4509 in PIE, except for R_386_PC32. */
4510 if ((bfd_link_pic (info
)
4512 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4513 && (!resolved_to_zero
4514 || r_type
== R_386_PC32
))
4515 || h
->root
.type
!= bfd_link_hash_undefweak
))
4516 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4517 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4518 || (ELIMINATE_COPY_RELOCS
4519 && !bfd_link_pic (info
)
4523 || eh
->func_pointer_refcount
> 0
4524 || (h
->root
.type
== bfd_link_hash_undefweak
4525 && !resolved_to_zero
))
4526 && ((h
->def_dynamic
&& !h
->def_regular
)
4527 /* Undefined weak symbol is bound locally when
4529 || h
->root
.type
== bfd_link_hash_undefweak
)))
4531 Elf_Internal_Rela outrel
;
4532 bfd_boolean skip
, relocate
;
4535 /* When generating a shared object, these relocations
4536 are copied into the output file to be resolved at run
4543 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4545 if (outrel
.r_offset
== (bfd_vma
) -1)
4547 else if (outrel
.r_offset
== (bfd_vma
) -2)
4548 skip
= TRUE
, relocate
= TRUE
;
4549 outrel
.r_offset
+= (input_section
->output_section
->vma
4550 + input_section
->output_offset
);
4553 memset (&outrel
, 0, sizeof outrel
);
4556 && (r_type
== R_386_PC32
4557 || !(bfd_link_executable (info
)
4558 || SYMBOLIC_BIND (info
, h
))
4559 || !h
->def_regular
))
4560 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4563 /* This symbol is local, or marked to become local. */
4565 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4568 sreloc
= elf_section_data (input_section
)->sreloc
;
4570 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4572 r
= bfd_reloc_notsupported
;
4573 goto check_relocation_error
;
4576 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4578 /* If this reloc is against an external symbol, we do
4579 not want to fiddle with the addend. Otherwise, we
4580 need to include the symbol value so that it becomes
4581 an addend for the dynamic reloc. */
4588 if (!bfd_link_executable (info
))
4590 Elf_Internal_Rela outrel
;
4593 outrel
.r_offset
= rel
->r_offset
4594 + input_section
->output_section
->vma
4595 + input_section
->output_offset
;
4596 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4597 sreloc
= elf_section_data (input_section
)->sreloc
;
4600 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4605 case R_386_TLS_GOTDESC
:
4606 case R_386_TLS_DESC_CALL
:
4607 case R_386_TLS_IE_32
:
4608 case R_386_TLS_GOTIE
:
4609 tls_type
= GOT_UNKNOWN
;
4610 if (h
== NULL
&& local_got_offsets
)
4611 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4613 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4614 if (tls_type
== GOT_TLS_IE
)
4615 tls_type
= GOT_TLS_IE_NEG
;
4617 if (! elf_i386_tls_transition (info
, input_bfd
,
4618 input_section
, contents
,
4619 symtab_hdr
, sym_hashes
,
4620 &r_type
, tls_type
, rel
,
4621 relend
, h
, r_symndx
, TRUE
))
4624 if (r_type
== R_386_TLS_LE_32
)
4626 BFD_ASSERT (! unresolved_reloc
);
4627 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4632 /* GD->LE transition. */
4633 type
= *(contents
+ rel
->r_offset
- 2);
4637 leal foo@tlsgd(,%ebx,1), %eax
4638 call ___tls_get_addr@PLT
4641 subl $foo@tpoff, %eax
4642 (6 byte form of subl). */
4643 roff
= rel
->r_offset
+ 5;
4648 leal foo@tlsgd(%ebx), %eax
4649 call ___tls_get_addr@PLT
4652 leal foo@tlsgd(%reg), %eax
4653 call *___tls_get_addr@GOT(%reg)
4654 which may be converted to
4655 addr32 call ___tls_get_addr
4657 movl %gs:0, %eax; subl $foo@tpoff, %eax
4658 (6 byte form of subl). */
4659 roff
= rel
->r_offset
+ 6;
4661 memcpy (contents
+ roff
- 8,
4662 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4663 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4665 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4670 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4672 /* GDesc -> LE transition.
4673 It's originally something like:
4674 leal x@tlsdesc(%ebx), %eax
4678 Registers other than %eax may be set up here. */
4683 roff
= rel
->r_offset
;
4684 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4686 /* Now modify the instruction as appropriate. */
4687 /* aoliva FIXME: remove the above and xor the byte
4689 bfd_put_8 (output_bfd
, val
^ 0x86,
4690 contents
+ roff
- 1);
4691 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4695 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4697 /* GDesc -> LE transition.
4705 roff
= rel
->r_offset
;
4706 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4707 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4710 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4714 /* IE->LE transition:
4715 Originally it can be one of:
4723 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4726 /* movl foo, %eax. */
4727 bfd_put_8 (output_bfd
, 0xb8,
4728 contents
+ rel
->r_offset
- 1);
4734 type
= bfd_get_8 (input_bfd
,
4735 contents
+ rel
->r_offset
- 2);
4740 bfd_put_8 (output_bfd
, 0xc7,
4741 contents
+ rel
->r_offset
- 2);
4742 bfd_put_8 (output_bfd
,
4743 0xc0 | ((val
>> 3) & 7),
4744 contents
+ rel
->r_offset
- 1);
4748 bfd_put_8 (output_bfd
, 0x81,
4749 contents
+ rel
->r_offset
- 2);
4750 bfd_put_8 (output_bfd
,
4751 0xc0 | ((val
>> 3) & 7),
4752 contents
+ rel
->r_offset
- 1);
4759 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4760 contents
+ rel
->r_offset
);
4765 unsigned int val
, type
;
4767 /* {IE_32,GOTIE}->LE transition:
4768 Originally it can be one of:
4769 subl foo(%reg1), %reg2
4770 movl foo(%reg1), %reg2
4771 addl foo(%reg1), %reg2
4774 movl $foo, %reg2 (6 byte form)
4775 addl $foo, %reg2. */
4776 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4777 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4781 bfd_put_8 (output_bfd
, 0xc7,
4782 contents
+ rel
->r_offset
- 2);
4783 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4784 contents
+ rel
->r_offset
- 1);
4786 else if (type
== 0x2b)
4789 bfd_put_8 (output_bfd
, 0x81,
4790 contents
+ rel
->r_offset
- 2);
4791 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4792 contents
+ rel
->r_offset
- 1);
4794 else if (type
== 0x03)
4797 bfd_put_8 (output_bfd
, 0x81,
4798 contents
+ rel
->r_offset
- 2);
4799 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4800 contents
+ rel
->r_offset
- 1);
4804 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4805 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4806 contents
+ rel
->r_offset
);
4808 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4809 contents
+ rel
->r_offset
);
4814 if (htab
->elf
.sgot
== NULL
)
4819 off
= h
->got
.offset
;
4820 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4824 if (local_got_offsets
== NULL
)
4827 off
= local_got_offsets
[r_symndx
];
4828 offplt
= local_tlsdesc_gotents
[r_symndx
];
4835 Elf_Internal_Rela outrel
;
4839 if (htab
->elf
.srelgot
== NULL
)
4842 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4844 if (GOT_TLS_GDESC_P (tls_type
))
4847 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4848 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4849 <= htab
->elf
.sgotplt
->size
);
4850 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4851 + htab
->elf
.sgotplt
->output_offset
4853 + htab
->sgotplt_jump_table_size
);
4854 sreloc
= htab
->elf
.srelplt
;
4855 loc
= sreloc
->contents
;
4856 loc
+= (htab
->next_tls_desc_index
++
4857 * sizeof (Elf32_External_Rel
));
4858 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4859 <= sreloc
->contents
+ sreloc
->size
);
4860 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4863 BFD_ASSERT (! unresolved_reloc
);
4864 bfd_put_32 (output_bfd
,
4865 relocation
- elf_i386_dtpoff_base (info
),
4866 htab
->elf
.sgotplt
->contents
+ offplt
4867 + htab
->sgotplt_jump_table_size
+ 4);
4871 bfd_put_32 (output_bfd
, 0,
4872 htab
->elf
.sgotplt
->contents
+ offplt
4873 + htab
->sgotplt_jump_table_size
+ 4);
4877 sreloc
= htab
->elf
.srelgot
;
4879 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4880 + htab
->elf
.sgot
->output_offset
+ off
);
4882 if (GOT_TLS_GD_P (tls_type
))
4883 dr_type
= R_386_TLS_DTPMOD32
;
4884 else if (GOT_TLS_GDESC_P (tls_type
))
4886 else if (tls_type
== GOT_TLS_IE_POS
)
4887 dr_type
= R_386_TLS_TPOFF
;
4889 dr_type
= R_386_TLS_TPOFF32
;
4891 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4892 bfd_put_32 (output_bfd
,
4893 relocation
- elf_i386_dtpoff_base (info
),
4894 htab
->elf
.sgot
->contents
+ off
);
4895 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4896 bfd_put_32 (output_bfd
,
4897 elf_i386_dtpoff_base (info
) - relocation
,
4898 htab
->elf
.sgot
->contents
+ off
);
4899 else if (dr_type
!= R_386_TLS_DESC
)
4900 bfd_put_32 (output_bfd
, 0,
4901 htab
->elf
.sgot
->contents
+ off
);
4902 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4904 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4906 if (GOT_TLS_GD_P (tls_type
))
4910 BFD_ASSERT (! unresolved_reloc
);
4911 bfd_put_32 (output_bfd
,
4912 relocation
- elf_i386_dtpoff_base (info
),
4913 htab
->elf
.sgot
->contents
+ off
+ 4);
4917 bfd_put_32 (output_bfd
, 0,
4918 htab
->elf
.sgot
->contents
+ off
+ 4);
4919 outrel
.r_info
= ELF32_R_INFO (indx
,
4920 R_386_TLS_DTPOFF32
);
4921 outrel
.r_offset
+= 4;
4922 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4925 else if (tls_type
== GOT_TLS_IE_BOTH
)
4927 bfd_put_32 (output_bfd
,
4929 ? relocation
- elf_i386_dtpoff_base (info
)
4931 htab
->elf
.sgot
->contents
+ off
+ 4);
4932 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4933 outrel
.r_offset
+= 4;
4934 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4941 local_got_offsets
[r_symndx
] |= 1;
4944 if (off
>= (bfd_vma
) -2
4945 && ! GOT_TLS_GDESC_P (tls_type
))
4947 if (r_type
== R_386_TLS_GOTDESC
4948 || r_type
== R_386_TLS_DESC_CALL
)
4950 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4951 unresolved_reloc
= FALSE
;
4953 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4955 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4956 + htab
->elf
.sgotplt
->output_offset
;
4957 relocation
= htab
->elf
.sgot
->output_section
->vma
4958 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4959 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4960 && tls_type
== GOT_TLS_IE_BOTH
)
4962 if (r_type
== R_386_TLS_IE
)
4963 relocation
+= g_o_t
;
4964 unresolved_reloc
= FALSE
;
4966 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4968 unsigned int val
, type
;
4971 /* GD->IE transition. */
4972 type
= *(contents
+ rel
->r_offset
- 2);
4973 val
= *(contents
+ rel
->r_offset
- 1);
4977 leal foo@tlsgd(,%ebx,1), %eax
4978 call ___tls_get_addr@PLT
4981 subl $foo@gottpoff(%ebx), %eax. */
4983 roff
= rel
->r_offset
- 3;
4988 leal foo@tlsgd(%ebx), %eax
4989 call ___tls_get_addr@PLT
4992 leal foo@tlsgd(%reg), %eax
4993 call *___tls_get_addr@GOT(%reg)
4994 which may be converted to
4995 addr32 call ___tls_get_addr
4998 subl $foo@gottpoff(%reg), %eax. */
4999 roff
= rel
->r_offset
- 2;
5001 memcpy (contents
+ roff
,
5002 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
5003 contents
[roff
+ 7] = 0x80 | (val
& 7);
5004 /* If foo is used only with foo@gotntpoff(%reg) and
5005 foo@indntpoff, but not with foo@gottpoff(%reg), change
5006 subl $foo@gottpoff(%reg), %eax
5008 addl $foo@gotntpoff(%reg), %eax. */
5009 if (tls_type
== GOT_TLS_IE_POS
)
5010 contents
[roff
+ 6] = 0x03;
5011 bfd_put_32 (output_bfd
,
5012 htab
->elf
.sgot
->output_section
->vma
5013 + htab
->elf
.sgot
->output_offset
+ off
5014 - htab
->elf
.sgotplt
->output_section
->vma
5015 - htab
->elf
.sgotplt
->output_offset
,
5016 contents
+ roff
+ 8);
5017 /* Skip R_386_PLT32 and R_386_GOT32X. */
5022 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
5024 /* GDesc -> IE transition.
5025 It's originally something like:
5026 leal x@tlsdesc(%ebx), %eax
5029 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5031 movl x@gottpoff(%ebx), %eax # before negl %eax
5033 Registers other than %eax may be set up here. */
5037 /* First, make sure it's a leal adding ebx to a 32-bit
5038 offset into any register, although it's probably
5039 almost always going to be eax. */
5040 roff
= rel
->r_offset
;
5042 /* Now modify the instruction as appropriate. */
5043 /* To turn a leal into a movl in the form we use it, it
5044 suffices to change the first byte from 0x8d to 0x8b.
5045 aoliva FIXME: should we decide to keep the leal, all
5046 we have to do is remove the statement below, and
5047 adjust the relaxation of R_386_TLS_DESC_CALL. */
5048 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
5050 if (tls_type
== GOT_TLS_IE_BOTH
)
5053 bfd_put_32 (output_bfd
,
5054 htab
->elf
.sgot
->output_section
->vma
5055 + htab
->elf
.sgot
->output_offset
+ off
5056 - htab
->elf
.sgotplt
->output_section
->vma
5057 - htab
->elf
.sgotplt
->output_offset
,
5061 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
5063 /* GDesc -> IE transition.
5071 depending on how we transformed the TLS_GOTDESC above.
5076 roff
= rel
->r_offset
;
5078 /* Now modify the instruction as appropriate. */
5079 if (tls_type
!= GOT_TLS_IE_NEG
)
5082 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5083 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5088 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
5089 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
5099 if (! elf_i386_tls_transition (info
, input_bfd
,
5100 input_section
, contents
,
5101 symtab_hdr
, sym_hashes
,
5102 &r_type
, GOT_UNKNOWN
, rel
,
5103 relend
, h
, r_symndx
, TRUE
))
5106 if (r_type
!= R_386_TLS_LDM
)
5108 /* LD->LE transition. Change
5109 leal foo@tlsldm(%ebx) %eax
5110 call ___tls_get_addr@PLT
5114 leal 0(%esi,1), %esi
5116 leal foo@tlsldm(%reg) %eax
5117 call *___tls_get_addr@GOT(%reg)
5118 which may be converted to
5119 addr32 call ___tls_get_addr
5122 leal 0(%esi), %esi */
5123 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
5124 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
5125 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
5126 memcpy (contents
+ rel
->r_offset
- 2,
5127 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5129 memcpy (contents
+ rel
->r_offset
- 2,
5130 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5131 /* Skip R_386_PC32/R_386_PLT32. */
5137 if (htab
->elf
.sgot
== NULL
)
5140 off
= htab
->tls_ldm_got
.offset
;
5145 Elf_Internal_Rela outrel
;
5147 if (htab
->elf
.srelgot
== NULL
)
5150 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5151 + htab
->elf
.sgot
->output_offset
+ off
);
5153 bfd_put_32 (output_bfd
, 0,
5154 htab
->elf
.sgot
->contents
+ off
);
5155 bfd_put_32 (output_bfd
, 0,
5156 htab
->elf
.sgot
->contents
+ off
+ 4);
5157 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5158 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5159 htab
->tls_ldm_got
.offset
|= 1;
5161 relocation
= htab
->elf
.sgot
->output_section
->vma
5162 + htab
->elf
.sgot
->output_offset
+ off
5163 - htab
->elf
.sgotplt
->output_section
->vma
5164 - htab
->elf
.sgotplt
->output_offset
;
5165 unresolved_reloc
= FALSE
;
5168 case R_386_TLS_LDO_32
:
5169 if (!bfd_link_executable (info
)
5170 || (input_section
->flags
& SEC_CODE
) == 0)
5171 relocation
-= elf_i386_dtpoff_base (info
);
5173 /* When converting LDO to LE, we must negate. */
5174 relocation
= -elf_i386_tpoff (info
, relocation
);
5177 case R_386_TLS_LE_32
:
5179 if (!bfd_link_executable (info
))
5181 Elf_Internal_Rela outrel
;
5184 outrel
.r_offset
= rel
->r_offset
5185 + input_section
->output_section
->vma
5186 + input_section
->output_offset
;
5187 if (h
!= NULL
&& h
->dynindx
!= -1)
5191 if (r_type
== R_386_TLS_LE_32
)
5192 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5194 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5195 sreloc
= elf_section_data (input_section
)->sreloc
;
5198 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5201 else if (r_type
== R_386_TLS_LE_32
)
5202 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5204 relocation
-= elf_i386_dtpoff_base (info
);
5206 else if (r_type
== R_386_TLS_LE_32
)
5207 relocation
= elf_i386_tpoff (info
, relocation
);
5209 relocation
= -elf_i386_tpoff (info
, relocation
);
5216 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5217 because such sections are not SEC_ALLOC and thus ld.so will
5218 not process them. */
5219 if (unresolved_reloc
5220 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5222 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5223 rel
->r_offset
) != (bfd_vma
) -1)
5226 /* xgettext:c-format */
5227 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5230 (long) rel
->r_offset
,
5232 h
->root
.root
.string
);
5237 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5238 contents
, rel
->r_offset
,
5241 check_relocation_error
:
5242 if (r
!= bfd_reloc_ok
)
5247 name
= h
->root
.root
.string
;
5250 name
= bfd_elf_string_from_elf_section (input_bfd
,
5251 symtab_hdr
->sh_link
,
5256 name
= bfd_section_name (input_bfd
, sec
);
5259 if (r
== bfd_reloc_overflow
)
5260 (*info
->callbacks
->reloc_overflow
)
5261 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5262 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5266 /* xgettext:c-format */
5267 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5268 input_bfd
, input_section
,
5269 (long) rel
->r_offset
, name
, (int) r
);
5280 Elf_Internal_Shdr
*rel_hdr
;
5281 size_t deleted
= rel
- wrel
;
5283 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5284 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5285 if (rel_hdr
->sh_size
== 0)
5287 /* It is too late to remove an empty reloc section. Leave
5289 ??? What is wrong with an empty section??? */
5290 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5293 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5294 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5295 input_section
->reloc_count
-= deleted
;
5301 /* Finish up dynamic symbol handling. We set the contents of various
5302 dynamic sections here. */
5305 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5306 struct bfd_link_info
*info
,
5307 struct elf_link_hash_entry
*h
,
5308 Elf_Internal_Sym
*sym
)
5310 struct elf_i386_link_hash_table
*htab
;
5311 unsigned plt_entry_size
;
5312 const struct elf_i386_backend_data
*abed
;
5313 struct elf_i386_link_hash_entry
*eh
;
5314 bfd_boolean local_undefweak
;
5316 htab
= elf_i386_hash_table (info
);
5320 abed
= get_elf_i386_backend_data (output_bfd
);
5321 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
5323 eh
= (struct elf_i386_link_hash_entry
*) h
;
5325 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5326 resolved undefined weak symbols in executable so that their
5327 references have value 0 at run-time. */
5328 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5332 if (h
->plt
.offset
!= (bfd_vma
) -1)
5336 Elf_Internal_Rela rel
;
5338 asection
*plt
, *gotplt
, *relplt
;
5340 /* When building a static executable, use .iplt, .igot.plt and
5341 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5342 if (htab
->elf
.splt
!= NULL
)
5344 plt
= htab
->elf
.splt
;
5345 gotplt
= htab
->elf
.sgotplt
;
5346 relplt
= htab
->elf
.srelplt
;
5350 plt
= htab
->elf
.iplt
;
5351 gotplt
= htab
->elf
.igotplt
;
5352 relplt
= htab
->elf
.irelplt
;
5355 /* This symbol has an entry in the procedure linkage table. Set
5358 if ((h
->dynindx
== -1
5360 && !((h
->forced_local
|| bfd_link_executable (info
))
5362 && h
->type
== STT_GNU_IFUNC
))
5368 /* Get the index in the procedure linkage table which
5369 corresponds to this symbol. This is the index of this symbol
5370 in all the symbols for which we are making plt entries. The
5371 first entry in the procedure linkage table is reserved.
5373 Get the offset into the .got table of the entry that
5374 corresponds to this function. Each .got entry is 4 bytes.
5375 The first three are reserved.
5377 For static executables, we don't reserve anything. */
5379 if (plt
== htab
->elf
.splt
)
5381 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
5382 got_offset
= (got_offset
+ 3) * 4;
5386 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5387 got_offset
= got_offset
* 4;
5390 /* Fill in the entry in the procedure linkage table. */
5391 if (! bfd_link_pic (info
))
5393 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
5394 abed
->plt
->plt_entry_size
);
5395 bfd_put_32 (output_bfd
,
5396 (gotplt
->output_section
->vma
5397 + gotplt
->output_offset
5399 plt
->contents
+ h
->plt
.offset
5400 + abed
->plt
->plt_got_offset
);
5402 if (abed
->is_vxworks
)
5404 int s
, k
, reloc_index
;
5406 /* Create the R_386_32 relocation referencing the GOT
5407 for this PLT entry. */
5409 /* S: Current slot number (zero-based). */
5410 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
5411 / abed
->plt
->plt_entry_size
);
5412 /* K: Number of relocations for PLTResolve. */
5413 if (bfd_link_pic (info
))
5414 k
= PLTRESOLVE_RELOCS_SHLIB
;
5416 k
= PLTRESOLVE_RELOCS
;
5417 /* Skip the PLTresolve relocations, and the relocations for
5418 the other PLT slots. */
5419 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5420 loc
= (htab
->srelplt2
->contents
+ reloc_index
5421 * sizeof (Elf32_External_Rel
));
5423 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5424 + htab
->elf
.splt
->output_offset
5425 + h
->plt
.offset
+ 2),
5426 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5427 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5429 /* Create the R_386_32 relocation referencing the beginning of
5430 the PLT for this GOT entry. */
5431 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5432 + htab
->elf
.sgotplt
->output_offset
5434 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5435 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5436 loc
+ sizeof (Elf32_External_Rel
));
5441 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
5442 abed
->plt
->plt_entry_size
);
5443 bfd_put_32 (output_bfd
, got_offset
,
5444 plt
->contents
+ h
->plt
.offset
5445 + abed
->plt
->plt_got_offset
);
5448 /* Fill in the entry in the global offset table. Leave the entry
5449 as zero for undefined weak symbol in PIE. No PLT relocation
5450 against undefined weak symbol in PIE. */
5451 if (!local_undefweak
)
5453 bfd_put_32 (output_bfd
,
5454 (plt
->output_section
->vma
5455 + plt
->output_offset
5457 + abed
->plt
->plt_lazy_offset
),
5458 gotplt
->contents
+ got_offset
);
5460 /* Fill in the entry in the .rel.plt section. */
5461 rel
.r_offset
= (gotplt
->output_section
->vma
5462 + gotplt
->output_offset
5464 if (h
->dynindx
== -1
5465 || ((bfd_link_executable (info
)
5466 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5468 && h
->type
== STT_GNU_IFUNC
))
5470 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5471 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5472 in the .got.plt section. */
5473 bfd_put_32 (output_bfd
,
5474 (h
->root
.u
.def
.value
5475 + h
->root
.u
.def
.section
->output_section
->vma
5476 + h
->root
.u
.def
.section
->output_offset
),
5477 gotplt
->contents
+ got_offset
);
5478 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5479 /* R_386_IRELATIVE comes last. */
5480 plt_index
= htab
->next_irelative_index
--;
5484 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5485 plt_index
= htab
->next_jump_slot_index
++;
5488 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5489 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5491 /* Don't fill PLT entry for static executables. */
5492 if (plt
== htab
->elf
.splt
)
5494 bfd_put_32 (output_bfd
,
5495 plt_index
* sizeof (Elf32_External_Rel
),
5496 plt
->contents
+ h
->plt
.offset
5497 + abed
->plt
->plt_reloc_offset
);
5498 bfd_put_32 (output_bfd
, - (h
->plt
.offset
5499 + abed
->plt
->plt_plt_offset
+ 4),
5500 plt
->contents
+ h
->plt
.offset
5501 + abed
->plt
->plt_plt_offset
);
5505 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5507 bfd_vma got_offset
, plt_offset
;
5508 asection
*plt
, *got
, *gotplt
;
5509 const bfd_byte
*got_plt_entry
;
5511 /* Offset of displacement of the indirect jump. */
5512 bfd_vma plt_got_offset
= 2;
5514 /* Set the entry in the GOT procedure linkage table. */
5515 plt
= htab
->plt_got
;
5516 got
= htab
->elf
.sgot
;
5517 gotplt
= htab
->elf
.sgotplt
;
5518 got_offset
= h
->got
.offset
;
5520 if (got_offset
== (bfd_vma
) -1
5526 /* Fill in the entry in the GOT procedure linkage table. */
5527 if (! bfd_link_pic (info
))
5529 got_plt_entry
= elf_i386_got_plt_entry
;
5530 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5534 got_plt_entry
= elf_i386_pic_got_plt_entry
;
5535 got_offset
+= (got
->output_section
->vma
5536 + got
->output_offset
5537 - gotplt
->output_section
->vma
5538 - gotplt
->output_offset
);
5541 plt_offset
= eh
->plt_got
.offset
;
5542 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5543 sizeof (elf_i386_got_plt_entry
));
5544 bfd_put_32 (output_bfd
, got_offset
,
5545 plt
->contents
+ plt_offset
+ plt_got_offset
);
5548 if (!local_undefweak
5550 && (h
->plt
.offset
!= (bfd_vma
) -1
5551 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5553 /* Mark the symbol as undefined, rather than as defined in
5554 the .plt section. Leave the value if there were any
5555 relocations where pointer equality matters (this is a clue
5556 for the dynamic linker, to make function pointer
5557 comparisons work between an application and shared
5558 library), otherwise set it to zero. If a function is only
5559 called from a binary, there is no need to slow down
5560 shared libraries because of that. */
5561 sym
->st_shndx
= SHN_UNDEF
;
5562 if (!h
->pointer_equality_needed
)
5566 /* Don't generate dynamic GOT relocation against undefined weak
5567 symbol in executable. */
5568 if (h
->got
.offset
!= (bfd_vma
) -1
5569 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5570 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5571 && !local_undefweak
)
5573 Elf_Internal_Rela rel
;
5574 asection
*relgot
= htab
->elf
.srelgot
;
5576 /* This symbol has an entry in the global offset table. Set it
5579 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5582 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5583 + htab
->elf
.sgot
->output_offset
5584 + (h
->got
.offset
& ~(bfd_vma
) 1));
5586 /* If this is a static link, or it is a -Bsymbolic link and the
5587 symbol is defined locally or was forced to be local because
5588 of a version file, we just want to emit a RELATIVE reloc.
5589 The entry in the global offset table will already have been
5590 initialized in the relocate_section function. */
5592 && h
->type
== STT_GNU_IFUNC
)
5594 if (h
->plt
.offset
== (bfd_vma
) -1)
5596 /* STT_GNU_IFUNC is referenced without PLT. */
5597 if (htab
->elf
.splt
== NULL
)
5599 /* use .rel[a].iplt section to store .got relocations
5600 in static executable. */
5601 relgot
= htab
->elf
.irelplt
;
5603 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5605 bfd_put_32 (output_bfd
,
5606 (h
->root
.u
.def
.value
5607 + h
->root
.u
.def
.section
->output_section
->vma
5608 + h
->root
.u
.def
.section
->output_offset
),
5609 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5610 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5615 else if (bfd_link_pic (info
))
5617 /* Generate R_386_GLOB_DAT. */
5624 if (!h
->pointer_equality_needed
)
5627 /* For non-shared object, we can't use .got.plt, which
5628 contains the real function addres if we need pointer
5629 equality. We load the GOT entry with the PLT entry. */
5630 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5631 bfd_put_32 (output_bfd
,
5632 (plt
->output_section
->vma
5633 + plt
->output_offset
+ h
->plt
.offset
),
5634 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5638 else if (bfd_link_pic (info
)
5639 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5641 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5642 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5646 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5648 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5649 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5650 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5653 elf_append_rel (output_bfd
, relgot
, &rel
);
5658 Elf_Internal_Rela rel
;
5661 /* This symbol needs a copy reloc. Set it up. */
5663 if (h
->dynindx
== -1
5664 || (h
->root
.type
!= bfd_link_hash_defined
5665 && h
->root
.type
!= bfd_link_hash_defweak
)
5666 || htab
->elf
.srelbss
== NULL
5667 || htab
->elf
.sreldynrelro
== NULL
)
5670 rel
.r_offset
= (h
->root
.u
.def
.value
5671 + h
->root
.u
.def
.section
->output_section
->vma
5672 + h
->root
.u
.def
.section
->output_offset
);
5673 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5674 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5675 s
= htab
->elf
.sreldynrelro
;
5677 s
= htab
->elf
.srelbss
;
5678 elf_append_rel (output_bfd
, s
, &rel
);
5684 /* Finish up local dynamic symbol handling. We set the contents of
5685 various dynamic sections here. */
5688 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5690 struct elf_link_hash_entry
*h
5691 = (struct elf_link_hash_entry
*) *slot
;
5692 struct bfd_link_info
*info
5693 = (struct bfd_link_info
*) inf
;
5695 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5699 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5700 here since undefined weak symbol may not be dynamic and may not be
5701 called for elf_i386_finish_dynamic_symbol. */
5704 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5707 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5708 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5710 if (h
->root
.type
!= bfd_link_hash_undefweak
5711 || h
->dynindx
!= -1)
5714 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5718 /* Used to decide how to sort relocs in an optimal manner for the
5719 dynamic linker, before writing them out. */
5721 static enum elf_reloc_type_class
5722 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5723 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5724 const Elf_Internal_Rela
*rela
)
5726 bfd
*abfd
= info
->output_bfd
;
5727 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5728 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5730 if (htab
->dynsym
!= NULL
5731 && htab
->dynsym
->contents
!= NULL
)
5733 /* Check relocation against STT_GNU_IFUNC symbol if there are
5735 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5736 if (r_symndx
!= STN_UNDEF
)
5738 Elf_Internal_Sym sym
;
5739 if (!bed
->s
->swap_symbol_in (abfd
,
5740 (htab
->dynsym
->contents
5741 + r_symndx
* sizeof (Elf32_External_Sym
)),
5745 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5746 return reloc_class_ifunc
;
5750 switch (ELF32_R_TYPE (rela
->r_info
))
5752 case R_386_IRELATIVE
:
5753 return reloc_class_ifunc
;
5754 case R_386_RELATIVE
:
5755 return reloc_class_relative
;
5756 case R_386_JUMP_SLOT
:
5757 return reloc_class_plt
;
5759 return reloc_class_copy
;
5761 return reloc_class_normal
;
5765 /* Finish up the dynamic sections. */
5768 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5769 struct bfd_link_info
*info
)
5771 struct elf_i386_link_hash_table
*htab
;
5774 const struct elf_i386_backend_data
*abed
;
5776 htab
= elf_i386_hash_table (info
);
5780 dynobj
= htab
->elf
.dynobj
;
5781 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5782 abed
= get_elf_i386_backend_data (output_bfd
);
5784 if (htab
->elf
.dynamic_sections_created
)
5786 Elf32_External_Dyn
*dyncon
, *dynconend
;
5788 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5791 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5792 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5793 for (; dyncon
< dynconend
; dyncon
++)
5795 Elf_Internal_Dyn dyn
;
5798 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5803 if (abed
->is_vxworks
5804 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5809 s
= htab
->elf
.sgotplt
;
5810 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5814 s
= htab
->elf
.srelplt
;
5815 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5819 s
= htab
->elf
.srelplt
;
5820 dyn
.d_un
.d_val
= s
->size
;
5824 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5827 /* Fill in the first entry in the procedure linkage table. */
5828 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5830 if (bfd_link_pic (info
))
5832 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5833 abed
->plt
->plt0_entry_size
);
5834 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5835 abed
->plt0_pad_byte
,
5836 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5840 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5841 abed
->plt
->plt0_entry_size
);
5842 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5843 abed
->plt0_pad_byte
,
5844 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5845 bfd_put_32 (output_bfd
,
5846 (htab
->elf
.sgotplt
->output_section
->vma
5847 + htab
->elf
.sgotplt
->output_offset
5849 htab
->elf
.splt
->contents
5850 + abed
->plt
->plt0_got1_offset
);
5851 bfd_put_32 (output_bfd
,
5852 (htab
->elf
.sgotplt
->output_section
->vma
5853 + htab
->elf
.sgotplt
->output_offset
5855 htab
->elf
.splt
->contents
5856 + abed
->plt
->plt0_got2_offset
);
5858 if (abed
->is_vxworks
)
5860 Elf_Internal_Rela rel
;
5862 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5863 On IA32 we use REL relocations so the addend goes in
5864 the PLT directly. */
5865 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5866 + htab
->elf
.splt
->output_offset
5867 + abed
->plt
->plt0_got1_offset
);
5868 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5869 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5870 htab
->srelplt2
->contents
);
5871 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5872 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5873 + htab
->elf
.splt
->output_offset
5874 + abed
->plt
->plt0_got2_offset
);
5875 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5876 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5877 htab
->srelplt2
->contents
+
5878 sizeof (Elf32_External_Rel
));
5882 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5883 really seem like the right value. */
5884 elf_section_data (htab
->elf
.splt
->output_section
)
5885 ->this_hdr
.sh_entsize
= 4;
5887 /* Correct the .rel.plt.unloaded relocations. */
5888 if (abed
->is_vxworks
&& !bfd_link_pic (info
))
5890 int num_plts
= (htab
->elf
.splt
->size
5891 / abed
->plt
->plt_entry_size
) - 1;
5894 p
= htab
->srelplt2
->contents
;
5895 if (bfd_link_pic (info
))
5896 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5898 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5900 for (; num_plts
; num_plts
--)
5902 Elf_Internal_Rela rel
;
5903 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5904 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5905 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5906 p
+= sizeof (Elf32_External_Rel
);
5908 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5909 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5910 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5911 p
+= sizeof (Elf32_External_Rel
);
5917 if (htab
->elf
.sgotplt
)
5919 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5922 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5926 /* Fill in the first three entries in the global offset table. */
5927 if (htab
->elf
.sgotplt
->size
> 0)
5929 bfd_put_32 (output_bfd
,
5931 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5932 htab
->elf
.sgotplt
->contents
);
5933 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5934 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5937 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5940 /* Adjust .eh_frame for .plt section. */
5941 if (htab
->plt_eh_frame
!= NULL
5942 && htab
->plt_eh_frame
->contents
!= NULL
)
5944 if (htab
->elf
.splt
!= NULL
5945 && htab
->elf
.splt
->size
!= 0
5946 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5947 && htab
->elf
.splt
->output_section
!= NULL
5948 && htab
->plt_eh_frame
->output_section
!= NULL
)
5950 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5951 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5952 + htab
->plt_eh_frame
->output_offset
5953 + PLT_FDE_START_OFFSET
;
5954 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5955 htab
->plt_eh_frame
->contents
5956 + PLT_FDE_START_OFFSET
);
5958 if (htab
->plt_eh_frame
->sec_info_type
5959 == SEC_INFO_TYPE_EH_FRAME
)
5961 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5963 htab
->plt_eh_frame
->contents
))
5968 /* Adjust .eh_frame for .plt.got section. */
5969 if (htab
->plt_got_eh_frame
!= NULL
5970 && htab
->plt_got_eh_frame
->contents
!= NULL
)
5972 if (htab
->plt_got
!= NULL
5973 && htab
->plt_got
->size
!= 0
5974 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
5975 && htab
->plt_got
->output_section
!= NULL
5976 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
5978 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
5979 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
5980 + htab
->plt_got_eh_frame
->output_offset
5981 + PLT_FDE_START_OFFSET
;
5982 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5983 htab
->plt_got_eh_frame
->contents
5984 + PLT_FDE_START_OFFSET
);
5986 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5988 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5989 htab
->plt_got_eh_frame
,
5990 htab
->plt_got_eh_frame
->contents
))
5995 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5996 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5998 /* Fill PLT entries for undefined weak symbols in PIE. */
5999 if (bfd_link_pie (info
))
6000 bfd_hash_traverse (&info
->hash
->table
,
6001 elf_i386_pie_finish_undefweak_symbol
,
6007 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6008 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6009 It has to be done before elf_link_sort_relocs is called so that
6010 dynamic relocations are properly sorted. */
6013 elf_i386_output_arch_local_syms
6014 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
6015 struct bfd_link_info
*info
,
6016 void *flaginfo ATTRIBUTE_UNUSED
,
6017 int (*func
) (void *, const char *,
6020 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
6022 struct elf_i386_link_hash_table
*htab
= elf_i386_hash_table (info
);
6026 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6027 htab_traverse (htab
->loc_hash_table
,
6028 elf_i386_finish_local_dynamic_symbol
,
6034 /* Return an array of PLT entry symbol values. */
6037 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
6040 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6043 bfd_vma
*plt_sym_val
;
6045 bfd_byte
*plt_contents
;
6046 const struct elf_i386_backend_data
*bed
6047 = get_elf_i386_backend_data (abfd
);
6048 Elf_Internal_Shdr
*hdr
;
6050 /* Get the .plt section contents. */
6051 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6052 if (plt_contents
== NULL
)
6054 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6055 plt_contents
, 0, plt
->size
))
6058 free (plt_contents
);
6062 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6063 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
6066 hdr
= &elf_section_data (relplt
)->this_hdr
;
6067 count
= relplt
->size
/ hdr
->sh_entsize
;
6069 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
6070 if (plt_sym_val
== NULL
)
6073 for (i
= 0; i
< count
; i
++)
6074 plt_sym_val
[i
] = -1;
6076 plt_offset
= bed
->plt
->plt_entry_size
;
6077 p
= relplt
->relocation
;
6078 for (i
= 0; i
< count
; i
++, p
++)
6082 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6083 if (p
->howto
== NULL
)
6086 if (p
->howto
->type
!= R_386_JUMP_SLOT
6087 && p
->howto
->type
!= R_386_IRELATIVE
)
6090 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
6091 + bed
->plt
->plt_reloc_offset
));
6092 reloc_index
/= sizeof (Elf32_External_Rel
);
6093 if (reloc_index
< count
)
6094 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
6096 plt_offset
+= bed
->plt
->plt_entry_size
;
6098 /* PR binutils/18437: Skip extra relocations in the .rel.plt
6100 if (plt_offset
>= plt
->size
)
6104 free (plt_contents
);
6109 /* Similar to _bfd_elf_get_synthetic_symtab. */
6112 elf_i386_get_synthetic_symtab (bfd
*abfd
,
6119 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
6120 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
6121 dynsymcount
, dynsyms
, ret
,
6123 elf_i386_get_plt_sym_val
);
6126 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6129 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
6131 if (h
->plt
.offset
!= (bfd_vma
) -1
6133 && !h
->pointer_equality_needed
)
6136 return _bfd_elf_hash_symbol (h
);
6139 /* Parse i386 GNU properties. */
6141 static enum elf_property_kind
6142 elf_i386_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
6143 bfd_byte
*ptr
, unsigned int datasz
)
6149 case GNU_PROPERTY_X86_ISA_1_USED
:
6150 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6154 ((type
== GNU_PROPERTY_X86_ISA_1_USED
6155 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6156 : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
6158 return property_corrupt
;
6160 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
6161 prop
->u
.number
= bfd_h_get_32 (abfd
, ptr
);
6162 prop
->pr_kind
= property_number
;
6166 return property_ignored
;
6169 return property_number
;
6172 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6173 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6174 should be merged with ABFD. */
6177 elf_i386_merge_gnu_properties (bfd
*abfd ATTRIBUTE_UNUSED
,
6178 elf_property
*aprop
,
6179 elf_property
*bprop
)
6181 unsigned int number
;
6182 bfd_boolean updated
= FALSE
;
6183 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
6187 case GNU_PROPERTY_X86_ISA_1_USED
:
6188 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6189 if (aprop
!= NULL
&& bprop
!= NULL
)
6191 number
= aprop
->u
.number
;
6192 aprop
->u
.number
= number
| bprop
->u
.number
;
6193 updated
= number
!= (unsigned int) aprop
->u
.number
;
6197 /* Return TRUE if APROP is NULL to indicate that BPROP should
6198 be added to ABFD. */
6199 updated
= aprop
== NULL
;
6204 /* Never should happen. */
6211 #define TARGET_LITTLE_SYM i386_elf32_vec
6212 #define TARGET_LITTLE_NAME "elf32-i386"
6213 #define ELF_ARCH bfd_arch_i386
6214 #define ELF_TARGET_ID I386_ELF_DATA
6215 #define ELF_MACHINE_CODE EM_386
6216 #define ELF_MAXPAGESIZE 0x1000
6218 #define elf_backend_can_gc_sections 1
6219 #define elf_backend_can_refcount 1
6220 #define elf_backend_want_got_plt 1
6221 #define elf_backend_plt_readonly 1
6222 #define elf_backend_want_plt_sym 0
6223 #define elf_backend_got_header_size 12
6224 #define elf_backend_plt_alignment 4
6225 #define elf_backend_dtrel_excludes_plt 1
6226 #define elf_backend_extern_protected_data 1
6227 #define elf_backend_caches_rawsize 1
6228 #define elf_backend_want_dynrelro 1
6230 /* Support RELA for objdump of prelink objects. */
6231 #define elf_info_to_howto elf_i386_info_to_howto_rel
6232 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6234 #define bfd_elf32_mkobject elf_i386_mkobject
6236 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6237 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6238 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6239 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6240 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6242 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6243 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6244 #define elf_backend_check_relocs elf_i386_check_relocs
6245 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6246 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
6247 #define elf_backend_fake_sections elf_i386_fake_sections
6248 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6249 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6250 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6251 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6252 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6253 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6254 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6255 #define elf_backend_relocate_section elf_i386_relocate_section
6256 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6257 #define elf_backend_always_size_sections elf_i386_always_size_sections
6258 #define elf_backend_omit_section_dynsym \
6259 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6260 #define elf_backend_hash_symbol elf_i386_hash_symbol
6261 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6262 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
6263 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
6265 #include "elf32-target.h"
6267 /* FreeBSD support. */
6269 #undef TARGET_LITTLE_SYM
6270 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6271 #undef TARGET_LITTLE_NAME
6272 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6274 #define ELF_OSABI ELFOSABI_FREEBSD
6276 /* The kernel recognizes executables as valid only if they carry a
6277 "FreeBSD" label in the ELF header. So we put this label on all
6278 executables and (for simplicity) also all other object files. */
6281 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6283 _bfd_elf_post_process_headers (abfd
, info
);
6285 #ifdef OLD_FREEBSD_ABI_LABEL
6287 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6288 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
6289 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
6294 #undef elf_backend_post_process_headers
6295 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6297 #define elf32_bed elf32_i386_fbsd_bed
6299 #undef elf_backend_add_symbol_hook
6301 #include "elf32-target.h"
6305 #undef TARGET_LITTLE_SYM
6306 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6307 #undef TARGET_LITTLE_NAME
6308 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6310 #undef elf_backend_post_process_headers
6312 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6313 objects won't be recognized. */
6317 #define elf32_bed elf32_i386_sol2_bed
6319 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6321 #undef elf_backend_static_tls_alignment
6322 #define elf_backend_static_tls_alignment 8
6324 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6326 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6328 #undef elf_backend_want_plt_sym
6329 #define elf_backend_want_plt_sym 1
6331 #undef elf_backend_strtab_flags
6332 #define elf_backend_strtab_flags SHF_STRINGS
6334 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6335 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6336 FALSE otherwise. ISECTION is the best guess matching section from the
6337 input bfd IBFD, but it might be NULL. */
6340 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6341 bfd
*obfd ATTRIBUTE_UNUSED
,
6342 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6343 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6345 /* PR 19938: FIXME: Need to add code for setting the sh_info
6346 and sh_link fields of Solaris specific section types. */
6349 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6350 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6352 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6354 The following values should be set:
6357 -----------------------------------------------------------------------------
6358 SHT_SUNW_ancillary The section header index of 0
6359 [0x6fffffee] the associated string table.
6361 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6362 [0x6ffffff0] the associated symbol table. section header index of
6364 SHT_SUNW_capchain table,
6367 SHT_SUNW_symsort The section header index of 0
6368 [0x6ffffff1] the associated symbol table.
6370 SHT_SUNW_tlssort The section header index of 0
6371 [0x6ffffff2] the associated symbol table.
6373 SHT_SUNW_LDYNSYM The section header index of One greater than the
6374 [0x6ffffff3] the associated string table. symbol table index of the
6375 This index is the same string last local symbol,
6376 table used by the SHT_DYNSYM STB_LOCAL. Since
6377 section. SHT_SUNW_LDYNSYM only
6378 contains local symbols,
6379 sh_info is equivalent to
6380 the number of symbols in
6383 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6384 [0x6ffffff5] the section header index of to named strings, the
6385 the associated section header index of
6386 SHT_SUNW_capinfo table, the associated string
6387 otherwise 0. table, otherwise 0.
6389 SHT_SUNW_move The section header index of 0
6390 [0x6ffffffa] the associated symbol table.
6395 SHT_SUNW_syminfo The section header index of The section header index
6396 [0x6ffffffc] the associated symbol table. of the associated
6399 SHT_SUNW_verdef The section header index of The number of version
6400 [0x6ffffffd] the associated string table. definitions within the
6403 SHT_SUNW_verneed The section header index of The number of version
6404 [0x6ffffffe] the associated string table. dependencies within the
6407 SHT_SUNW_versym The section header index of 0
6408 [0x6fffffff] the associated symbol table. */
6411 #undef elf_backend_copy_special_section_fields
6412 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6414 #include "elf32-target.h"
6416 /* Intel MCU support. */
6419 elf32_iamcu_elf_object_p (bfd
*abfd
)
6421 /* Set the right machine number for an IAMCU elf32 file. */
6422 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
6426 #undef TARGET_LITTLE_SYM
6427 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6428 #undef TARGET_LITTLE_NAME
6429 #define TARGET_LITTLE_NAME "elf32-iamcu"
6431 #define ELF_ARCH bfd_arch_iamcu
6433 #undef ELF_MACHINE_CODE
6434 #define ELF_MACHINE_CODE EM_IAMCU
6439 #define elf32_bed elf32_iamcu_bed
6441 #undef elf_backend_object_p
6442 #define elf_backend_object_p elf32_iamcu_elf_object_p
6444 #undef elf_backend_static_tls_alignment
6446 #undef elf_backend_want_plt_sym
6447 #define elf_backend_want_plt_sym 0
6449 #undef elf_backend_strtab_flags
6450 #undef elf_backend_copy_special_section_fields
6452 #include "elf32-target.h"
6454 /* Restore defaults. */
6456 #define ELF_ARCH bfd_arch_i386
6457 #undef ELF_MACHINE_CODE
6458 #define ELF_MACHINE_CODE EM_386
6460 /* Native Client support. */
6462 #undef TARGET_LITTLE_SYM
6463 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6464 #undef TARGET_LITTLE_NAME
6465 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6467 #define elf32_bed elf32_i386_nacl_bed
6469 #undef ELF_MAXPAGESIZE
6470 #define ELF_MAXPAGESIZE 0x10000
6472 /* Restore defaults. */
6474 #undef elf_backend_want_plt_sym
6475 #define elf_backend_want_plt_sym 0
6476 #undef elf_backend_post_process_headers
6477 #undef elf_backend_static_tls_alignment
6479 /* NaCl uses substantially different PLT entries for the same effects. */
6481 #undef elf_backend_plt_alignment
6482 #define elf_backend_plt_alignment 5
6483 #define NACL_PLT_ENTRY_SIZE 64
6484 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6486 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
6488 0xff, 0x35, /* pushl contents of address */
6489 0, 0, 0, 0, /* replaced with address of .got + 4. */
6490 0x8b, 0x0d, /* movl contents of address, %ecx */
6491 0, 0, 0, 0, /* replaced with address of .got + 8. */
6492 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6493 0xff, 0xe1 /* jmp *%ecx */
6496 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6498 0x8b, 0x0d, /* movl contents of address, %ecx */
6499 0, 0, 0, 0, /* replaced with GOT slot address. */
6500 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6501 0xff, 0xe1, /* jmp *%ecx */
6503 /* Pad to the next 32-byte boundary with nop instructions. */
6505 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6506 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6508 /* Lazy GOT entries point here (32-byte aligned). */
6509 0x68, /* pushl immediate */
6510 0, 0, 0, 0, /* replaced with reloc offset. */
6511 0xe9, /* jmp relative */
6512 0, 0, 0, 0, /* replaced with offset to .plt. */
6514 /* Pad to the next 32-byte boundary with nop instructions. */
6515 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6516 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6520 static const bfd_byte
6521 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
6523 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6524 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6525 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6526 0xff, 0xe1, /* jmp *%ecx */
6528 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6529 so pad to that size with nop instructions. */
6530 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6533 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6535 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6536 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6537 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6538 0xff, 0xe1, /* jmp *%ecx */
6540 /* Pad to the next 32-byte boundary with nop instructions. */
6542 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6543 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6545 /* Lazy GOT entries point here (32-byte aligned). */
6546 0x68, /* pushl immediate */
6547 0, 0, 0, 0, /* replaced with offset into relocation table. */
6548 0xe9, /* jmp relative */
6549 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6551 /* Pad to the next 32-byte boundary with nop instructions. */
6552 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6553 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6557 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
6559 #if (PLT_CIE_LENGTH != 20 \
6560 || PLT_FDE_LENGTH != 36 \
6561 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6562 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6563 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6565 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6566 0, 0, 0, 0, /* CIE ID */
6567 1, /* CIE version */
6568 'z', 'R', 0, /* Augmentation string */
6569 1, /* Code alignment factor */
6570 0x7c, /* Data alignment factor: -4 */
6571 8, /* Return address column */
6572 1, /* Augmentation size */
6573 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6574 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6575 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6576 DW_CFA_nop
, DW_CFA_nop
,
6578 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6579 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
6580 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6581 0, 0, 0, 0, /* .plt size goes here */
6582 0, /* Augmentation size */
6583 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
6584 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6585 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
6586 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6587 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6588 13, /* Block length */
6589 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
6590 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
6591 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6592 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
6593 DW_CFA_nop
, DW_CFA_nop
6596 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
6598 elf_i386_nacl_plt0_entry
, /* plt0_entry */
6599 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
6600 2, /* plt0_got1_offset */
6601 8, /* plt0_got2_offset */
6602 elf_i386_nacl_plt_entry
, /* plt_entry */
6603 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6604 2, /* plt_got_offset */
6605 33, /* plt_reloc_offset */
6606 38, /* plt_plt_offset */
6607 32, /* plt_lazy_offset */
6608 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
6609 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
6610 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
6611 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
6612 NULL
, /* eh_frame_plt_got */
6613 0, /* eh_frame_plt_got_size */
6616 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
6618 &elf_i386_nacl_plt
, /* plt */
6619 0x90, /* plt0_pad_byte: nop insn */
6624 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
6626 /* Set the right machine number for a NaCl i386 ELF32 file. */
6627 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
6631 #undef elf_backend_arch_data
6632 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6634 #undef elf_backend_object_p
6635 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6636 #undef elf_backend_modify_segment_map
6637 #define elf_backend_modify_segment_map nacl_modify_segment_map
6638 #undef elf_backend_modify_program_headers
6639 #define elf_backend_modify_program_headers nacl_modify_program_headers
6640 #undef elf_backend_final_write_processing
6641 #define elf_backend_final_write_processing nacl_final_write_processing
6643 #include "elf32-target.h"
6645 /* Restore defaults. */
6646 #undef elf_backend_object_p
6647 #undef elf_backend_modify_segment_map
6648 #undef elf_backend_modify_program_headers
6649 #undef elf_backend_final_write_processing
6651 /* VxWorks support. */
6653 #undef TARGET_LITTLE_SYM
6654 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6655 #undef TARGET_LITTLE_NAME
6656 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6658 #undef elf_backend_plt_alignment
6659 #define elf_backend_plt_alignment 4
6661 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
6663 &elf_i386_plt
, /* plt */
6664 0x90, /* plt0_pad_byte */
6668 #undef elf_backend_arch_data
6669 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6671 #undef elf_backend_relocs_compatible
6672 #undef elf_backend_add_symbol_hook
6673 #define elf_backend_add_symbol_hook \
6674 elf_vxworks_add_symbol_hook
6675 #undef elf_backend_link_output_symbol_hook
6676 #define elf_backend_link_output_symbol_hook \
6677 elf_vxworks_link_output_symbol_hook
6678 #undef elf_backend_emit_relocs
6679 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6680 #undef elf_backend_final_write_processing
6681 #define elf_backend_final_write_processing \
6682 elf_vxworks_final_write_processing
6683 #undef elf_backend_static_tls_alignment
6685 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6687 #undef elf_backend_want_plt_sym
6688 #define elf_backend_want_plt_sym 1
6691 #define elf32_bed elf32_i386_vxworks_bed
6693 #include "elf32-target.h"