1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table
[]=
41 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
42 bfd_elf_generic_reloc
, "R_386_NONE",
43 TRUE
, 0x00000000, 0x00000000, FALSE
),
44 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
45 bfd_elf_generic_reloc
, "R_386_32",
46 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
47 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
48 bfd_elf_generic_reloc
, "R_386_PC32",
49 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
50 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
51 bfd_elf_generic_reloc
, "R_386_GOT32",
52 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
53 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
54 bfd_elf_generic_reloc
, "R_386_PLT32",
55 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
56 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
57 bfd_elf_generic_reloc
, "R_386_COPY",
58 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
59 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
61 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
62 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
64 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
65 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_386_RELATIVE",
67 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
68 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
69 bfd_elf_generic_reloc
, "R_386_GOTOFF",
70 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
71 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_386_GOTPC",
73 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
85 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
86 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_386_TLS_IE",
88 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
91 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
92 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_386_TLS_LE",
94 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
95 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_386_TLS_GD",
97 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
98 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
100 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
101 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_386_16",
103 TRUE
, 0xffff, 0xffff, FALSE
),
104 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_386_PC16",
106 TRUE
, 0xffff, 0xffff, TRUE
),
107 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_386_8",
109 TRUE
, 0xff, 0xff, FALSE
),
110 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_386_PC8",
112 TRUE
, 0xff, 0xff, TRUE
),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
119 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
120 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
122 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
123 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
125 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
126 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
128 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
129 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
131 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
132 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
133 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
134 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
135 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
136 bfd_elf_generic_reloc
, "R_386_SIZE32",
137 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
138 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
140 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
141 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
142 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
145 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
146 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
147 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
148 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
149 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
150 HOWTO(R_386_GOT32X
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
151 bfd_elf_generic_reloc
, "R_386_GOT32X",
152 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT
, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE
, /* pc_relative */
165 complain_overflow_dont
, /* complain_on_overflow */
166 NULL
, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE
, /* partial_inplace */
171 FALSE
), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY
, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE
, /* pc_relative */
180 complain_overflow_dont
, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE
, /* partial_inplace */
186 FALSE
) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type
*
200 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
201 bfd_reloc_code_real_type code
)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table
[R_386_NONE
];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table
[R_386_32
];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table
[R_386_32
];
217 case BFD_RELOC_32_PCREL
:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table
[R_386_PC32
];
221 case BFD_RELOC_386_GOT32
:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table
[R_386_GOT32
];
225 case BFD_RELOC_386_PLT32
:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table
[R_386_PLT32
];
229 case BFD_RELOC_386_COPY
:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table
[R_386_COPY
];
233 case BFD_RELOC_386_GLOB_DAT
:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table
[R_386_GLOB_DAT
];
237 case BFD_RELOC_386_JUMP_SLOT
:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table
[R_386_JUMP_SLOT
];
241 case BFD_RELOC_386_RELATIVE
:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table
[R_386_RELATIVE
];
245 case BFD_RELOC_386_GOTOFF
:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table
[R_386_GOTOFF
];
249 case BFD_RELOC_386_GOTPC
:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table
[R_386_GOTPC
];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF
:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_IE
:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_GOTIE
:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_LE
:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_GD
:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
274 case BFD_RELOC_386_TLS_LDM
:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
282 case BFD_RELOC_16_PCREL
:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
290 case BFD_RELOC_8_PCREL
:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32
:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_IE_32
:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_LE_32
:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPMOD32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_DTPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_386_TLS_TPOFF32
:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
319 case BFD_RELOC_SIZE32
:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_GOTDESC
:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC_CALL
:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
331 case BFD_RELOC_386_TLS_DESC
:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
335 case BFD_RELOC_386_IRELATIVE
:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
339 case BFD_RELOC_386_GOT32X
:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table
[R_386_GOT32X
- R_386_tls_offset
];
343 case BFD_RELOC_VTABLE_INHERIT
:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
347 case BFD_RELOC_VTABLE_ENTRY
:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
359 static reloc_howto_type
*
360 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
365 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
366 if (elf_howto_table
[i
].name
!= NULL
367 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
368 return &elf_howto_table
[i
];
373 static reloc_howto_type
*
374 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
378 if ((indx
= r_type
) >= R_386_standard
379 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
380 >= R_386_ext
- R_386_standard
)
381 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
382 >= R_386_ext2
- R_386_ext
)
383 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext2
384 >= R_386_vt
- R_386_ext2
))
386 /* xgettext:c-format */
387 _bfd_error_handler (_("%B: invalid relocation type %d"),
391 /* PR 17512: file: 0f67f69d. */
392 if (elf_howto_table
[indx
].type
!= r_type
)
394 return &elf_howto_table
[indx
];
398 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
400 Elf_Internal_Rela
*dst
)
402 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
403 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
406 /* Return whether a symbol name implies a local label. The UnixWare
407 2.1 cc generates temporary symbols that start with .X, so we
408 recognize them here. FIXME: do other SVR4 compilers also use .X?.
409 If so, we should move the .X recognition into
410 _bfd_elf_is_local_label_name. */
413 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
415 if (name
[0] == '.' && name
[1] == 'X')
418 return _bfd_elf_is_local_label_name (abfd
, name
);
421 /* Support for core dump NOTE sections. */
424 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
429 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
431 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
437 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
440 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
444 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
448 switch (note
->descsz
)
453 case 144: /* Linux/i386 */
455 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
458 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
468 /* Make a ".reg/999" section. */
469 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
470 size
, note
->descpos
+ offset
);
474 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
476 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
478 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
483 elf_tdata (abfd
)->core
->program
484 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
485 elf_tdata (abfd
)->core
->command
486 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
490 switch (note
->descsz
)
495 case 124: /* Linux/i386 elf_prpsinfo. */
496 elf_tdata (abfd
)->core
->pid
497 = bfd_get_32 (abfd
, note
->descdata
+ 12);
498 elf_tdata (abfd
)->core
->program
499 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
500 elf_tdata (abfd
)->core
->command
501 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
505 /* Note that for some reason, a spurious space is tacked
506 onto the end of the args in some (at least one anyway)
507 implementations, so strip it off if it exists. */
509 char *command
= elf_tdata (abfd
)->core
->command
;
510 int n
= strlen (command
);
512 if (0 < n
&& command
[n
- 1] == ' ')
513 command
[n
- 1] = '\0';
519 /* Functions for the i386 ELF linker.
521 In order to gain some understanding of code in this file without
522 knowing all the intricate details of the linker, note the
525 Functions named elf_i386_* are called by external routines, other
526 functions are only called locally. elf_i386_* functions appear
527 in this file more or less in the order in which they are called
528 from external routines. eg. elf_i386_check_relocs is called
529 early in the link process, elf_i386_finish_dynamic_sections is
530 one of the last functions. */
533 /* The name of the dynamic interpreter. This is put in the .interp
536 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
539 copying dynamic variables from a shared lib into an app's dynbss
540 section, and instead use a dynamic relocation to point into the
542 #define ELIMINATE_COPY_RELOCS 1
544 /* The size in bytes of an entry in the procedure linkage table. */
546 #define PLT_ENTRY_SIZE 16
548 /* The first entry in an absolute procedure linkage table looks like
549 this. See the SVR4 ABI i386 supplement to see how this works.
550 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
552 static const bfd_byte elf_i386_plt0_entry
[12] =
554 0xff, 0x35, /* pushl contents of address */
555 0, 0, 0, 0, /* replaced with address of .got + 4. */
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0 /* replaced with address of .got + 8. */
560 /* Subsequent entries in an absolute procedure linkage table look like
563 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
565 0xff, 0x25, /* jmp indirect */
566 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
567 0x68, /* pushl immediate */
568 0, 0, 0, 0, /* replaced with offset into relocation table. */
569 0xe9, /* jmp relative */
570 0, 0, 0, 0 /* replaced with offset to start of .plt. */
573 /* The first entry in a PIC procedure linkage table look like this.
574 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
576 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
578 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
579 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
582 /* Subsequent entries in a PIC procedure linkage table look like this. */
584 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
586 0xff, 0xa3, /* jmp *offset(%ebx) */
587 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
588 0x68, /* pushl immediate */
589 0, 0, 0, 0, /* replaced with offset into relocation table. */
590 0xe9, /* jmp relative */
591 0, 0, 0, 0 /* replaced with offset to start of .plt. */
594 /* Entries in the GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_got_plt_entry
[8] =
598 0xff, 0x25, /* jmp indirect */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* Entries in the PIC GOT procedure linkage table look like this. */
605 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
607 0xff, 0xa3, /* jmp *offset(%ebx) */
608 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
609 0x66, 0x90 /* xchg %ax,%ax */
612 /* .eh_frame covering the .plt section. */
614 static const bfd_byte elf_i386_eh_frame_plt
[] =
616 #define PLT_CIE_LENGTH 20
617 #define PLT_FDE_LENGTH 36
618 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
619 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
620 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
621 0, 0, 0, 0, /* CIE ID */
623 'z', 'R', 0, /* Augmentation string */
624 1, /* Code alignment factor */
625 0x7c, /* Data alignment factor */
626 8, /* Return address column */
627 1, /* Augmentation size */
628 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
629 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
630 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
631 DW_CFA_nop
, DW_CFA_nop
,
633 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
634 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
635 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
636 0, 0, 0, 0, /* .plt size goes here */
637 0, /* Augmentation size */
638 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
639 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
640 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
641 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
642 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
643 11, /* Block length */
644 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
645 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
646 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
647 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
648 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
651 /* .eh_frame covering the .plt.got section. */
653 static const bfd_byte elf_i386_eh_frame_plt_got
[] =
655 #define PLT_GOT_FDE_LENGTH 16
656 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
657 0, 0, 0, 0, /* CIE ID */
659 'z', 'R', 0, /* Augmentation string */
660 1, /* Code alignment factor */
661 0x7c, /* Data alignment factor */
662 8, /* Return address column */
663 1, /* Augmentation size */
664 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
665 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
666 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
667 DW_CFA_nop
, DW_CFA_nop
,
669 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
670 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
671 0, 0, 0, 0, /* the start of .plt.got goes here */
672 0, 0, 0, 0, /* .plt.got size goes here */
673 0, /* Augmentation size */
674 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
677 struct elf_i386_plt_layout
679 /* The first entry in an absolute procedure linkage table looks like this. */
680 const bfd_byte
*plt0_entry
;
681 unsigned int plt0_entry_size
;
683 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
684 unsigned int plt0_got1_offset
;
685 unsigned int plt0_got2_offset
;
687 /* Later entries in an absolute procedure linkage table look like this. */
688 const bfd_byte
*plt_entry
;
689 unsigned int plt_entry_size
;
691 /* Offsets into plt_entry that are to be replaced with... */
692 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
693 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
694 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
696 /* Offset into plt_entry where the initial value of the GOT entry points. */
697 unsigned int plt_lazy_offset
;
699 /* The first entry in a PIC procedure linkage table looks like this. */
700 const bfd_byte
*pic_plt0_entry
;
702 /* Subsequent entries in a PIC procedure linkage table look like this. */
703 const bfd_byte
*pic_plt_entry
;
705 /* .eh_frame covering the .plt section. */
706 const bfd_byte
*eh_frame_plt
;
707 unsigned int eh_frame_plt_size
;
709 /* .eh_frame covering the .plt.got section. */
710 const bfd_byte
*eh_frame_plt_got
;
711 unsigned int eh_frame_plt_got_size
;
714 #define GET_PLT_ENTRY_SIZE(abfd) \
715 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
717 /* These are the standard parameters. */
718 static const struct elf_i386_plt_layout elf_i386_plt
=
720 elf_i386_plt0_entry
, /* plt0_entry */
721 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
722 2, /* plt0_got1_offset */
723 8, /* plt0_got2_offset */
724 elf_i386_plt_entry
, /* plt_entry */
725 PLT_ENTRY_SIZE
, /* plt_entry_size */
726 2, /* plt_got_offset */
727 7, /* plt_reloc_offset */
728 12, /* plt_plt_offset */
729 6, /* plt_lazy_offset */
730 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
731 elf_i386_pic_plt_entry
, /* pic_plt_entry */
732 elf_i386_eh_frame_plt
, /* eh_frame_plt */
733 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
734 elf_i386_eh_frame_plt_got
, /* eh_frame_plt_got */
735 sizeof (elf_i386_eh_frame_plt_got
), /* eh_frame_plt_got_size */
739 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
740 for the PLTResolve stub and then for each PLT entry. */
741 #define PLTRESOLVE_RELOCS_SHLIB 0
742 #define PLTRESOLVE_RELOCS 2
743 #define PLT_NON_JUMP_SLOT_RELOCS 2
745 /* Architecture-specific backend data for i386. */
747 struct elf_i386_backend_data
749 /* Parameters describing PLT generation. */
750 const struct elf_i386_plt_layout
*plt
;
752 /* Value used to fill the unused bytes of the first PLT entry. */
753 bfd_byte plt0_pad_byte
;
755 /* True if the target system is VxWorks. */
759 #define get_elf_i386_backend_data(abfd) \
760 ((const struct elf_i386_backend_data *) \
761 get_elf_backend_data (abfd)->arch_data)
763 /* These are the standard parameters. */
764 static const struct elf_i386_backend_data elf_i386_arch_bed
=
766 &elf_i386_plt
, /* plt */
767 0, /* plt0_pad_byte */
771 #define elf_backend_arch_data &elf_i386_arch_bed
773 /* Is a undefined weak symbol which is resolved to 0. Reference to an
774 undefined weak symbol is resolved to 0 when building executable if
776 1. Has non-GOT/non-PLT relocations in text section. Or
777 2. Has no GOT/PLT relocation.
779 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
780 ((EH)->elf.root.type == bfd_link_hash_undefweak \
781 && bfd_link_executable (INFO) \
782 && (elf_i386_hash_table (INFO)->interp == NULL \
784 || (EH)->has_non_got_reloc \
785 || !(INFO)->dynamic_undefined_weak))
787 /* i386 ELF linker hash entry. */
789 struct elf_i386_link_hash_entry
791 struct elf_link_hash_entry elf
;
793 /* Track dynamic relocs copied for this symbol. */
794 struct elf_dyn_relocs
*dyn_relocs
;
796 #define GOT_UNKNOWN 0
800 #define GOT_TLS_IE_POS 5
801 #define GOT_TLS_IE_NEG 6
802 #define GOT_TLS_IE_BOTH 7
803 #define GOT_TLS_GDESC 8
804 #define GOT_TLS_GD_BOTH_P(type) \
805 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
806 #define GOT_TLS_GD_P(type) \
807 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
808 #define GOT_TLS_GDESC_P(type) \
809 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
810 #define GOT_TLS_GD_ANY_P(type) \
811 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
812 unsigned char tls_type
;
814 /* Symbol is referenced by R_386_GOTOFF relocation. */
815 unsigned int gotoff_ref
: 1;
817 /* Symbol has GOT or PLT relocations. */
818 unsigned int has_got_reloc
: 1;
820 /* Symbol has non-GOT/non-PLT relocations in text sections. */
821 unsigned int has_non_got_reloc
: 1;
823 /* Don't call finish_dynamic_symbol on this symbol. */
824 unsigned int no_finish_dynamic_symbol
: 1;
826 /* 0: symbol isn't ___tls_get_addr.
827 1: symbol is ___tls_get_addr.
828 2: symbol is unknown. */
829 unsigned int tls_get_addr
: 2;
831 /* Reference count of C/C++ function pointer relocations in read-write
832 section which can be resolved at run-time. */
833 bfd_signed_vma func_pointer_refcount
;
835 /* Information about the GOT PLT entry. Filled when there are both
836 GOT and PLT relocations against the same function. */
837 union gotplt_union plt_got
;
839 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
840 starting at the end of the jump table. */
844 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
846 struct elf_i386_obj_tdata
848 struct elf_obj_tdata root
;
850 /* tls_type for each local got entry. */
851 char *local_got_tls_type
;
853 /* GOTPLT entries for TLS descriptors. */
854 bfd_vma
*local_tlsdesc_gotent
;
857 #define elf_i386_tdata(abfd) \
858 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
860 #define elf_i386_local_got_tls_type(abfd) \
861 (elf_i386_tdata (abfd)->local_got_tls_type)
863 #define elf_i386_local_tlsdesc_gotent(abfd) \
864 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
866 #define is_i386_elf(bfd) \
867 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
868 && elf_tdata (bfd) != NULL \
869 && elf_object_id (bfd) == I386_ELF_DATA)
872 elf_i386_mkobject (bfd
*abfd
)
874 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
878 /* i386 ELF linker hash table. */
880 struct elf_i386_link_hash_table
882 struct elf_link_hash_table elf
;
884 /* Short-cuts to get to dynamic linker sections. */
886 asection
*plt_eh_frame
;
888 asection
*plt_got_eh_frame
;
892 bfd_signed_vma refcount
;
896 /* The amount of space used by the reserved portion of the sgotplt
897 section, plus whatever space is used by the jump slots. */
898 bfd_vma sgotplt_jump_table_size
;
900 /* Small local sym cache. */
901 struct sym_cache sym_cache
;
903 /* _TLS_MODULE_BASE_ symbol. */
904 struct bfd_link_hash_entry
*tls_module_base
;
906 /* Used by local STT_GNU_IFUNC symbols. */
907 htab_t loc_hash_table
;
908 void * loc_hash_memory
;
910 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
913 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
914 bfd_vma next_tls_desc_index
;
916 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
917 bfd_vma next_jump_slot_index
;
919 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
920 bfd_vma next_irelative_index
;
922 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
923 to read-only sections. */
924 bfd_boolean readonly_dynrelocs_against_ifunc
;
927 /* Get the i386 ELF linker hash table from a link_info structure. */
929 #define elf_i386_hash_table(p) \
930 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
931 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
933 #define elf_i386_compute_jump_table_size(htab) \
934 ((htab)->elf.srelplt->reloc_count * 4)
936 /* Create an entry in an i386 ELF linker hash table. */
938 static struct bfd_hash_entry
*
939 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
940 struct bfd_hash_table
*table
,
943 /* Allocate the structure if it has not already been allocated by a
947 entry
= (struct bfd_hash_entry
*)
948 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
953 /* Call the allocation method of the superclass. */
954 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
957 struct elf_i386_link_hash_entry
*eh
;
959 eh
= (struct elf_i386_link_hash_entry
*) entry
;
960 eh
->dyn_relocs
= NULL
;
961 eh
->tls_type
= GOT_UNKNOWN
;
963 eh
->has_got_reloc
= 0;
964 eh
->has_non_got_reloc
= 0;
965 eh
->no_finish_dynamic_symbol
= 0;
966 eh
->tls_get_addr
= 2;
967 eh
->func_pointer_refcount
= 0;
968 eh
->plt_got
.offset
= (bfd_vma
) -1;
969 eh
->tlsdesc_got
= (bfd_vma
) -1;
975 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
976 for local symbol so that we can handle local STT_GNU_IFUNC symbols
977 as global symbol. We reuse indx and dynstr_index for local symbol
978 hash since they aren't used by global symbols in this backend. */
981 elf_i386_local_htab_hash (const void *ptr
)
983 struct elf_link_hash_entry
*h
984 = (struct elf_link_hash_entry
*) ptr
;
985 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
988 /* Compare local hash entries. */
991 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
993 struct elf_link_hash_entry
*h1
994 = (struct elf_link_hash_entry
*) ptr1
;
995 struct elf_link_hash_entry
*h2
996 = (struct elf_link_hash_entry
*) ptr2
;
998 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
1001 /* Find and/or create a hash entry for local symbol. */
1003 static struct elf_link_hash_entry
*
1004 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
1005 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1008 struct elf_i386_link_hash_entry e
, *ret
;
1009 asection
*sec
= abfd
->sections
;
1010 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1011 ELF32_R_SYM (rel
->r_info
));
1014 e
.elf
.indx
= sec
->id
;
1015 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1016 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1017 create
? INSERT
: NO_INSERT
);
1024 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
1028 ret
= (struct elf_i386_link_hash_entry
*)
1029 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1030 sizeof (struct elf_i386_link_hash_entry
));
1033 memset (ret
, 0, sizeof (*ret
));
1034 ret
->elf
.indx
= sec
->id
;
1035 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1036 ret
->elf
.dynindx
= -1;
1037 ret
->func_pointer_refcount
= 0;
1038 ret
->plt_got
.offset
= (bfd_vma
) -1;
1044 /* Destroy an i386 ELF linker hash table. */
1047 elf_i386_link_hash_table_free (bfd
*obfd
)
1049 struct elf_i386_link_hash_table
*htab
1050 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1052 if (htab
->loc_hash_table
)
1053 htab_delete (htab
->loc_hash_table
);
1054 if (htab
->loc_hash_memory
)
1055 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1056 _bfd_elf_link_hash_table_free (obfd
);
1059 /* Create an i386 ELF linker hash table. */
1061 static struct bfd_link_hash_table
*
1062 elf_i386_link_hash_table_create (bfd
*abfd
)
1064 struct elf_i386_link_hash_table
*ret
;
1065 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1067 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1071 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1072 elf_i386_link_hash_newfunc
,
1073 sizeof (struct elf_i386_link_hash_entry
),
1080 ret
->loc_hash_table
= htab_try_create (1024,
1081 elf_i386_local_htab_hash
,
1082 elf_i386_local_htab_eq
,
1084 ret
->loc_hash_memory
= objalloc_create ();
1085 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1087 elf_i386_link_hash_table_free (abfd
);
1090 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1092 return &ret
->elf
.root
;
1095 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1096 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1100 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1102 struct elf_i386_link_hash_table
*htab
;
1104 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1107 htab
= elf_i386_hash_table (info
);
1111 /* Set the contents of the .interp section to the interpreter. */
1112 if (bfd_link_executable (info
) && !info
->nointerp
)
1114 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
1117 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1118 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1122 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1123 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1127 if (htab
->elf
.splt
!= NULL
)
1129 if (htab
->plt_got
== NULL
1130 && !get_elf_i386_backend_data (dynobj
)->is_vxworks
1131 && get_elf_i386_backend_data (dynobj
) == &elf_i386_arch_bed
)
1133 /* Create the GOT procedure linkage table. */
1134 unsigned int plt_got_align
;
1135 const struct elf_backend_data
*bed
;
1137 bed
= get_elf_backend_data (dynobj
);
1138 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1139 && (sizeof (elf_i386_got_plt_entry
)
1140 == sizeof (elf_i386_pic_got_plt_entry
)));
1144 = bfd_make_section_anyway_with_flags (dynobj
,
1146 (bed
->dynamic_sec_flags
1151 if (htab
->plt_got
== NULL
1152 || !bfd_set_section_alignment (dynobj
,
1158 if (!info
->no_ld_generated_unwind_info
)
1160 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1161 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1162 | SEC_LINKER_CREATED
);
1164 if (htab
->plt_eh_frame
== NULL
)
1167 = bfd_make_section_anyway_with_flags (dynobj
,
1170 if (htab
->plt_eh_frame
== NULL
1171 || !bfd_set_section_alignment (dynobj
,
1177 if (htab
->plt_got_eh_frame
== NULL
1178 && htab
->plt_got
!= NULL
)
1180 htab
->plt_got_eh_frame
1181 = bfd_make_section_anyway_with_flags (dynobj
,
1184 if (htab
->plt_got_eh_frame
== NULL
1185 || !bfd_set_section_alignment (dynobj
,
1186 htab
->plt_got_eh_frame
,
1196 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1199 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1200 struct elf_link_hash_entry
*dir
,
1201 struct elf_link_hash_entry
*ind
)
1203 struct elf_i386_link_hash_entry
*edir
, *eind
;
1205 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1206 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1208 if (eind
->dyn_relocs
!= NULL
)
1210 if (edir
->dyn_relocs
!= NULL
)
1212 struct elf_dyn_relocs
**pp
;
1213 struct elf_dyn_relocs
*p
;
1215 /* Add reloc counts against the indirect sym to the direct sym
1216 list. Merge any entries against the same section. */
1217 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1219 struct elf_dyn_relocs
*q
;
1221 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1222 if (q
->sec
== p
->sec
)
1224 q
->pc_count
+= p
->pc_count
;
1225 q
->count
+= p
->count
;
1232 *pp
= edir
->dyn_relocs
;
1235 edir
->dyn_relocs
= eind
->dyn_relocs
;
1236 eind
->dyn_relocs
= NULL
;
1239 if (ind
->root
.type
== bfd_link_hash_indirect
1240 && dir
->got
.refcount
<= 0)
1242 edir
->tls_type
= eind
->tls_type
;
1243 eind
->tls_type
= GOT_UNKNOWN
;
1246 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1247 generate a R_386_COPY reloc. */
1248 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1250 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1251 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1253 if (ELIMINATE_COPY_RELOCS
1254 && ind
->root
.type
!= bfd_link_hash_indirect
1255 && dir
->dynamic_adjusted
)
1257 /* If called to transfer flags for a weakdef during processing
1258 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1259 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1260 if (dir
->versioned
!= versioned_hidden
)
1261 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1262 dir
->ref_regular
|= ind
->ref_regular
;
1263 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1264 dir
->needs_plt
|= ind
->needs_plt
;
1265 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1269 if (eind
->func_pointer_refcount
> 0)
1271 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1272 eind
->func_pointer_refcount
= 0;
1275 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1279 /* Return TRUE if the TLS access code sequence support transition
1283 elf_i386_check_tls_transition (asection
*sec
,
1285 Elf_Internal_Shdr
*symtab_hdr
,
1286 struct elf_link_hash_entry
**sym_hashes
,
1287 unsigned int r_type
,
1288 const Elf_Internal_Rela
*rel
,
1289 const Elf_Internal_Rela
*relend
)
1291 unsigned int val
, type
, reg
;
1292 unsigned long r_symndx
;
1293 struct elf_link_hash_entry
*h
;
1296 bfd_boolean indirect_call
, tls_get_addr
;
1298 offset
= rel
->r_offset
;
1303 if (offset
< 2 || (rel
+ 1) >= relend
)
1306 indirect_call
= FALSE
;
1307 call
= contents
+ offset
+ 4;
1310 if (r_type
== R_386_TLS_GD
)
1312 /* Check transition from GD access model. Only
1313 leal foo@tlsgd(,%ebx,1), %eax
1314 call ___tls_get_addr@PLT
1316 leal foo@tlsgd(%ebx) %eax
1317 call ___tls_get_addr@PLT
1320 leal foo@tlsgd(%reg), %eax
1321 call *___tls_get_addr@GOT(%reg)
1322 which may be converted to
1323 addr32 call ___tls_get_addr
1324 can transit to different access model. */
1325 if ((offset
+ 10) > sec
->size
1326 || (type
!= 0x8d && type
!= 0x04))
1331 /* leal foo@tlsgd(,%ebx,1), %eax
1332 call ___tls_get_addr@PLT */
1336 if (*(call
- 7) != 0x8d
1344 leal foo@tlsgd(%ebx), %eax
1345 call ___tls_get_addr@PLT
1348 leal foo@tlsgd(%reg), %eax
1349 call *___tls_get_addr@GOT(%reg)
1350 which may be converted to
1351 addr32 call ___tls_get_addr
1353 %eax can't be used as the GOT base register since it
1354 is used to pass parameter to ___tls_get_addr. */
1356 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1359 indirect_call
= call
[0] == 0xff;
1360 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
1361 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1363 && (call
[1] & 0xf8) == 0x90
1364 && (call
[1] & 0x7) == reg
))
1370 /* Check transition from LD access model. Only
1371 leal foo@tlsldm(%ebx), %eax
1372 call ___tls_get_addr@PLT
1374 leal foo@tlsldm(%reg), %eax
1375 call *___tls_get_addr@GOT(%reg)
1376 which may be converted to
1377 addr32 call ___tls_get_addr
1378 can transit to different access model. */
1379 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1382 /* %eax can't be used as the GOT base register since it is
1383 used to pass parameter to ___tls_get_addr. */
1385 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1388 indirect_call
= call
[0] == 0xff;
1389 if (!(reg
== 3 && call
[0] == 0xe8)
1390 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1392 && (call
[1] & 0xf8) == 0x90
1393 && (call
[1] & 0x7) == reg
))
1397 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1398 if (r_symndx
< symtab_hdr
->sh_info
)
1401 tls_get_addr
= FALSE
;
1402 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1403 if (h
!= NULL
&& h
->root
.root
.string
!= NULL
)
1405 struct elf_i386_link_hash_entry
*eh
1406 = (struct elf_i386_link_hash_entry
*) h
;
1407 tls_get_addr
= eh
->tls_get_addr
== 1;
1408 if (eh
->tls_get_addr
> 1)
1410 /* Use strncmp to check ___tls_get_addr since
1411 ___tls_get_addr may be versioned. */
1412 if (strncmp (h
->root
.root
.string
, "___tls_get_addr", 15)
1415 eh
->tls_get_addr
= 1;
1416 tls_get_addr
= TRUE
;
1419 eh
->tls_get_addr
= 0;
1425 else if (indirect_call
)
1426 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
1428 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1429 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
1432 /* Check transition from IE access model:
1433 movl foo@indntpoff(%rip), %eax
1434 movl foo@indntpoff(%rip), %reg
1435 addl foo@indntpoff(%rip), %reg
1438 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1441 /* Check "movl foo@tpoff(%rip), %eax" first. */
1442 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1449 /* Check movl|addl foo@tpoff(%rip), %reg. */
1450 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1451 return ((type
== 0x8b || type
== 0x03)
1452 && (val
& 0xc7) == 0x05);
1454 case R_386_TLS_GOTIE
:
1455 case R_386_TLS_IE_32
:
1456 /* Check transition from {IE_32,GOTIE} access model:
1457 subl foo@{tpoff,gontoff}(%reg1), %reg2
1458 movl foo@{tpoff,gontoff}(%reg1), %reg2
1459 addl foo@{tpoff,gontoff}(%reg1), %reg2
1462 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1465 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1466 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1469 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1470 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1472 case R_386_TLS_GOTDESC
:
1473 /* Check transition from GDesc access model:
1474 leal x@tlsdesc(%ebx), %eax
1476 Make sure it's a leal adding ebx to a 32-bit offset
1477 into any register, although it's probably almost always
1480 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1483 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1486 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1487 return (val
& 0xc7) == 0x83;
1489 case R_386_TLS_DESC_CALL
:
1490 /* Check transition from GDesc access model:
1491 call *x@tlsdesc(%eax)
1493 if (offset
+ 2 <= sec
->size
)
1495 /* Make sure that it's a call *x@tlsdesc(%eax). */
1496 call
= contents
+ offset
;
1497 return call
[0] == 0xff && call
[1] == 0x10;
1507 /* Return TRUE if the TLS access transition is OK or no transition
1508 will be performed. Update R_TYPE if there is a transition. */
1511 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1512 asection
*sec
, bfd_byte
*contents
,
1513 Elf_Internal_Shdr
*symtab_hdr
,
1514 struct elf_link_hash_entry
**sym_hashes
,
1515 unsigned int *r_type
, int tls_type
,
1516 const Elf_Internal_Rela
*rel
,
1517 const Elf_Internal_Rela
*relend
,
1518 struct elf_link_hash_entry
*h
,
1519 unsigned long r_symndx
,
1520 bfd_boolean from_relocate_section
)
1522 unsigned int from_type
= *r_type
;
1523 unsigned int to_type
= from_type
;
1524 bfd_boolean check
= TRUE
;
1526 /* Skip TLS transition for functions. */
1528 && (h
->type
== STT_FUNC
1529 || h
->type
== STT_GNU_IFUNC
))
1535 case R_386_TLS_GOTDESC
:
1536 case R_386_TLS_DESC_CALL
:
1537 case R_386_TLS_IE_32
:
1539 case R_386_TLS_GOTIE
:
1540 if (bfd_link_executable (info
))
1543 to_type
= R_386_TLS_LE_32
;
1544 else if (from_type
!= R_386_TLS_IE
1545 && from_type
!= R_386_TLS_GOTIE
)
1546 to_type
= R_386_TLS_IE_32
;
1549 /* When we are called from elf_i386_relocate_section, there may
1550 be additional transitions based on TLS_TYPE. */
1551 if (from_relocate_section
)
1553 unsigned int new_to_type
= to_type
;
1555 if (bfd_link_executable (info
)
1558 && (tls_type
& GOT_TLS_IE
))
1559 new_to_type
= R_386_TLS_LE_32
;
1561 if (to_type
== R_386_TLS_GD
1562 || to_type
== R_386_TLS_GOTDESC
1563 || to_type
== R_386_TLS_DESC_CALL
)
1565 if (tls_type
== GOT_TLS_IE_POS
)
1566 new_to_type
= R_386_TLS_GOTIE
;
1567 else if (tls_type
& GOT_TLS_IE
)
1568 new_to_type
= R_386_TLS_IE_32
;
1571 /* We checked the transition before when we were called from
1572 elf_i386_check_relocs. We only want to check the new
1573 transition which hasn't been checked before. */
1574 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1575 to_type
= new_to_type
;
1581 if (bfd_link_executable (info
))
1582 to_type
= R_386_TLS_LE_32
;
1589 /* Return TRUE if there is no transition. */
1590 if (from_type
== to_type
)
1593 /* Check if the transition can be performed. */
1595 && ! elf_i386_check_tls_transition (sec
, contents
,
1596 symtab_hdr
, sym_hashes
,
1597 from_type
, rel
, relend
))
1599 reloc_howto_type
*from
, *to
;
1602 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1603 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1606 name
= h
->root
.root
.string
;
1609 struct elf_i386_link_hash_table
*htab
;
1611 htab
= elf_i386_hash_table (info
);
1616 Elf_Internal_Sym
*isym
;
1618 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1620 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1625 /* xgettext:c-format */
1626 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1627 "in section `%A' failed"),
1628 abfd
, from
->name
, to
->name
, name
,
1629 (unsigned long) rel
->r_offset
, sec
);
1630 bfd_set_error (bfd_error_bad_value
);
1638 /* With the local symbol, foo, we convert
1639 mov foo@GOT[(%reg1)], %reg2
1641 lea foo[@GOTOFF(%reg1)], %reg2
1643 call/jmp *foo@GOT[(%reg)]
1645 nop call foo/jmp foo nop
1646 When PIC is false, convert
1647 test %reg1, foo@GOT[(%reg2)]
1651 binop foo@GOT[(%reg1)], %reg2
1654 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1659 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1661 Elf_Internal_Rela
*irel
,
1662 struct elf_link_hash_entry
*h
,
1663 bfd_boolean
*converted
,
1664 struct bfd_link_info
*link_info
)
1666 struct elf_i386_link_hash_table
*htab
;
1667 unsigned int opcode
;
1669 bfd_boolean baseless
;
1670 Elf_Internal_Sym
*isym
;
1671 unsigned int addend
;
1675 bfd_boolean to_reloc_32
;
1676 unsigned int r_type
;
1677 unsigned int r_symndx
;
1678 bfd_vma roff
= irel
->r_offset
;
1683 /* Addend for R_386_GOT32X relocations must be 0. */
1684 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1688 htab
= elf_i386_hash_table (link_info
);
1689 is_pic
= bfd_link_pic (link_info
);
1691 r_type
= ELF32_R_TYPE (irel
->r_info
);
1692 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1694 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1695 baseless
= (modrm
& 0xc7) == 0x5;
1697 if (baseless
&& is_pic
)
1699 /* For PIC, disallow R_386_GOT32X without a base register
1700 since we don't know what the GOT base is. */
1705 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1707 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1710 name
= h
->root
.root
.string
;
1713 /* xgettext:c-format */
1714 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1715 " register can not be used when making a shared object"),
1720 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1722 /* Convert to R_386_32 if PIC is false or there is no base
1724 to_reloc_32
= !is_pic
|| baseless
;
1726 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1730 if (opcode
== 0x0ff)
1731 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1732 goto convert_branch
;
1734 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1735 "test %reg1, foo@GOT(%reg2)" and
1736 "binop foo@GOT[(%reg1)], %reg2". */
1740 /* Undefined weak symbol is only bound locally in executable
1741 and its reference is resolved as 0. */
1742 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
, TRUE
,
1743 elf_i386_hash_entry (h
)))
1747 /* No direct branch to 0 for PIC. */
1751 goto convert_branch
;
1755 /* We can convert load of address 0 to R_386_32. */
1763 /* We have "call/jmp *foo@GOT[(%reg)]". */
1764 if ((h
->root
.type
== bfd_link_hash_defined
1765 || h
->root
.type
== bfd_link_hash_defweak
)
1766 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1768 /* The function is locally defined. */
1770 /* Convert R_386_GOT32X to R_386_PC32. */
1771 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1773 struct elf_i386_link_hash_entry
*eh
1774 = (struct elf_i386_link_hash_entry
*) h
;
1776 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1779 /* To support TLS optimization, always use addr32 prefix
1780 for "call *___tls_get_addr@GOT(%reg)". */
1781 if (eh
&& eh
->tls_get_addr
== 1)
1784 nop_offset
= irel
->r_offset
- 2;
1788 nop
= link_info
->call_nop_byte
;
1789 if (link_info
->call_nop_as_suffix
)
1791 nop_offset
= roff
+ 3;
1792 irel
->r_offset
-= 1;
1795 nop_offset
= roff
- 2;
1800 /* Convert to "jmp foo nop". */
1803 nop_offset
= roff
+ 3;
1804 irel
->r_offset
-= 1;
1807 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1808 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1809 /* When converting to PC-relative relocation, we
1810 need to adjust addend by -4. */
1811 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1812 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1819 /* We have "mov foo@GOT[(%re1g)], %reg2",
1820 "test %reg1, foo@GOT(%reg2)" and
1821 "binop foo@GOT[(%reg1)], %reg2".
1823 Avoid optimizing _DYNAMIC since ld.so may use its
1824 link-time address. */
1825 if (h
== htab
->elf
.hdynamic
)
1828 /* def_regular is set by an assignment in a linker script in
1829 bfd_elf_record_link_assignment. */
1831 || h
->root
.type
== bfd_link_hash_defined
1832 || h
->root
.type
== bfd_link_hash_defweak
)
1833 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1840 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1841 "mov $foo, %reg2" with R_386_32. */
1843 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1844 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1849 /* Convert "mov foo@GOT(%reg1), %reg2" to
1850 "lea foo@GOTOFF(%reg1), %reg2". */
1851 r_type
= R_386_GOTOFF
;
1857 /* Only R_386_32 is supported. */
1863 /* Convert "test %reg1, foo@GOT(%reg2)" to
1864 "test $foo, %reg1". */
1865 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1870 /* Convert "binop foo@GOT(%reg1), %reg2" to
1871 "binop $foo, %reg2". */
1873 | (modrm
& 0x38) >> 3
1877 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1881 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1882 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1891 /* Rename some of the generic section flags to better document how they
1893 #define need_convert_load sec_flg0
1894 #define check_relocs_failed sec_flg1
1896 /* Look through the relocs for a section during the first phase, and
1897 calculate needed space in the global offset table, procedure linkage
1898 table, and dynamic reloc sections. */
1901 elf_i386_check_relocs (bfd
*abfd
,
1902 struct bfd_link_info
*info
,
1904 const Elf_Internal_Rela
*relocs
)
1906 struct elf_i386_link_hash_table
*htab
;
1907 Elf_Internal_Shdr
*symtab_hdr
;
1908 struct elf_link_hash_entry
**sym_hashes
;
1909 const Elf_Internal_Rela
*rel
;
1910 const Elf_Internal_Rela
*rel_end
;
1914 if (bfd_link_relocatable (info
))
1917 /* Don't do anything special with non-loaded, non-alloced sections.
1918 In particular, any relocs in such sections should not affect GOT
1919 and PLT reference counting (ie. we don't allow them to create GOT
1920 or PLT entries), there's no possibility or desire to optimize TLS
1921 relocs, and there's not much point in propagating relocs to shared
1922 libs that the dynamic linker won't relocate. */
1923 if ((sec
->flags
& SEC_ALLOC
) == 0)
1926 BFD_ASSERT (is_i386_elf (abfd
));
1928 htab
= elf_i386_hash_table (info
);
1931 sec
->check_relocs_failed
= 1;
1935 /* Get the section contents. */
1936 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1937 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1938 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1940 sec
->check_relocs_failed
= 1;
1944 symtab_hdr
= &elf_symtab_hdr (abfd
);
1945 sym_hashes
= elf_sym_hashes (abfd
);
1949 rel_end
= relocs
+ sec
->reloc_count
;
1950 for (rel
= relocs
; rel
< rel_end
; rel
++)
1952 unsigned int r_type
;
1953 unsigned long r_symndx
;
1954 struct elf_link_hash_entry
*h
;
1955 struct elf_i386_link_hash_entry
*eh
;
1956 Elf_Internal_Sym
*isym
;
1958 bfd_boolean size_reloc
;
1960 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1961 r_type
= ELF32_R_TYPE (rel
->r_info
);
1963 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1965 /* xgettext:c-format */
1966 _bfd_error_handler (_("%B: bad symbol index: %d"),
1971 if (r_symndx
< symtab_hdr
->sh_info
)
1973 /* A local symbol. */
1974 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1979 /* Check relocation against local STT_GNU_IFUNC symbol. */
1980 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1982 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1986 /* Fake a STT_GNU_IFUNC symbol. */
1987 h
->type
= STT_GNU_IFUNC
;
1990 h
->forced_local
= 1;
1991 h
->root
.type
= bfd_link_hash_defined
;
1999 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2000 while (h
->root
.type
== bfd_link_hash_indirect
2001 || h
->root
.type
== bfd_link_hash_warning
)
2002 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2005 eh
= (struct elf_i386_link_hash_entry
*) h
;
2021 if (htab
->elf
.dynobj
== NULL
)
2022 htab
->elf
.dynobj
= abfd
;
2023 /* Create the ifunc sections for static executables. */
2024 if (h
->type
== STT_GNU_IFUNC
2025 && !_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
,
2031 /* It is referenced by a non-shared object. */
2033 h
->root
.non_ir_ref
= 1;
2035 if (h
->type
== STT_GNU_IFUNC
)
2036 elf_tdata (info
->output_bfd
)->has_gnu_symbols
2037 |= elf_gnu_symbol_ifunc
;
2040 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
2041 symtab_hdr
, sym_hashes
,
2042 &r_type
, GOT_UNKNOWN
,
2043 rel
, rel_end
, h
, r_symndx
, FALSE
))
2049 htab
->tls_ldm_got
.refcount
+= 1;
2053 /* This symbol requires a procedure linkage table entry. We
2054 actually build the entry in adjust_dynamic_symbol,
2055 because this might be a case of linking PIC code which is
2056 never referenced by a dynamic object, in which case we
2057 don't need to generate a procedure linkage table entry
2060 /* If this is a local symbol, we resolve it directly without
2061 creating a procedure linkage table entry. */
2065 eh
->has_got_reloc
= 1;
2067 h
->plt
.refcount
+= 1;
2074 case R_386_TLS_IE_32
:
2076 case R_386_TLS_GOTIE
:
2077 if (!bfd_link_executable (info
))
2078 info
->flags
|= DF_STATIC_TLS
;
2084 case R_386_TLS_GOTDESC
:
2085 case R_386_TLS_DESC_CALL
:
2086 /* This symbol requires a global offset table entry. */
2088 int tls_type
, old_tls_type
;
2095 tls_type
= GOT_NORMAL
;
2097 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
2098 case R_386_TLS_GOTDESC
:
2099 case R_386_TLS_DESC_CALL
:
2100 tls_type
= GOT_TLS_GDESC
; break;
2101 case R_386_TLS_IE_32
:
2102 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
2103 tls_type
= GOT_TLS_IE_NEG
;
2105 /* If this is a GD->IE transition, we may use either of
2106 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2107 tls_type
= GOT_TLS_IE
;
2110 case R_386_TLS_GOTIE
:
2111 tls_type
= GOT_TLS_IE_POS
; break;
2116 h
->got
.refcount
+= 1;
2117 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2121 bfd_signed_vma
*local_got_refcounts
;
2123 /* This is a global offset table entry for a local symbol. */
2124 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2125 if (local_got_refcounts
== NULL
)
2129 size
= symtab_hdr
->sh_info
;
2130 size
*= (sizeof (bfd_signed_vma
)
2131 + sizeof (bfd_vma
) + sizeof(char));
2132 local_got_refcounts
= (bfd_signed_vma
*)
2133 bfd_zalloc (abfd
, size
);
2134 if (local_got_refcounts
== NULL
)
2136 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2137 elf_i386_local_tlsdesc_gotent (abfd
)
2138 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2139 elf_i386_local_got_tls_type (abfd
)
2140 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2142 local_got_refcounts
[r_symndx
] += 1;
2143 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
2146 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
2147 tls_type
|= old_tls_type
;
2148 /* If a TLS symbol is accessed using IE at least once,
2149 there is no point to use dynamic model for it. */
2150 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2151 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2152 || (tls_type
& GOT_TLS_IE
) == 0))
2154 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
2155 tls_type
= old_tls_type
;
2156 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2157 && GOT_TLS_GD_ANY_P (tls_type
))
2158 tls_type
|= old_tls_type
;
2162 name
= h
->root
.root
.string
;
2164 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2167 /* xgettext:c-format */
2168 (_("%B: `%s' accessed both as normal and "
2169 "thread local symbol"),
2171 bfd_set_error (bfd_error_bad_value
);
2176 if (old_tls_type
!= tls_type
)
2179 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
2181 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2189 if (htab
->elf
.sgot
== NULL
)
2191 if (htab
->elf
.dynobj
== NULL
)
2192 htab
->elf
.dynobj
= abfd
;
2193 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
2196 if (r_type
!= R_386_TLS_IE
)
2199 eh
->has_got_reloc
= 1;
2204 case R_386_TLS_LE_32
:
2207 eh
->has_got_reloc
= 1;
2208 if (bfd_link_executable (info
))
2210 info
->flags
|= DF_STATIC_TLS
;
2215 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2216 eh
->has_non_got_reloc
= 1;
2218 /* We are called after all symbols have been resolved. Only
2219 relocation against STT_GNU_IFUNC symbol must go through
2222 && (bfd_link_executable (info
)
2223 || h
->type
== STT_GNU_IFUNC
))
2225 /* If this reloc is in a read-only section, we might
2226 need a copy reloc. We can't check reliably at this
2227 stage whether the section is read-only, as input
2228 sections have not yet been mapped to output sections.
2229 Tentatively set the flag for now, and correct in
2230 adjust_dynamic_symbol. */
2233 /* We may need a .plt entry if the symbol is a function
2234 defined in a shared lib or is a STT_GNU_IFUNC function
2235 referenced from the code or read-only section. */
2237 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2238 h
->plt
.refcount
+= 1;
2240 if (r_type
== R_386_PC32
)
2242 /* Since something like ".long foo - ." may be used
2243 as pointer, make sure that PLT is used if foo is
2244 a function defined in a shared library. */
2245 if ((sec
->flags
& SEC_CODE
) == 0)
2246 h
->pointer_equality_needed
= 1;
2247 else if (h
->type
== STT_GNU_IFUNC
2248 && bfd_link_pic (info
))
2251 name
= h
->root
.root
.string
;
2253 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2256 /* xgettext:c-format */
2257 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2259 bfd_set_error (bfd_error_bad_value
);
2265 h
->pointer_equality_needed
= 1;
2266 /* R_386_32 can be resolved at run-time. */
2267 if (r_type
== R_386_32
2268 && (sec
->flags
& SEC_READONLY
) == 0)
2269 eh
->func_pointer_refcount
+= 1;
2275 /* If we are creating a shared library, and this is a reloc
2276 against a global symbol, or a non PC relative reloc
2277 against a local symbol, then we need to copy the reloc
2278 into the shared library. However, if we are linking with
2279 -Bsymbolic, we do not need to copy a reloc against a
2280 global symbol which is defined in an object we are
2281 including in the link (i.e., DEF_REGULAR is set). At
2282 this point we have not seen all the input files, so it is
2283 possible that DEF_REGULAR is not set now but will be set
2284 later (it is never cleared). In case of a weak definition,
2285 DEF_REGULAR may be cleared later by a strong definition in
2286 a shared library. We account for that possibility below by
2287 storing information in the relocs_copied field of the hash
2288 table entry. A similar situation occurs when creating
2289 shared libraries and symbol visibility changes render the
2292 If on the other hand, we are creating an executable, we
2293 may need to keep relocations for symbols satisfied by a
2294 dynamic library if we manage to avoid copy relocs for the
2297 Generate dynamic pointer relocation against STT_GNU_IFUNC
2298 symbol in the non-code section. */
2299 if ((bfd_link_pic (info
)
2300 && (r_type
!= R_386_PC32
2302 && (! (bfd_link_pie (info
)
2303 || SYMBOLIC_BIND (info
, h
))
2304 || h
->root
.type
== bfd_link_hash_defweak
2305 || !h
->def_regular
))))
2307 && h
->type
== STT_GNU_IFUNC
2308 && r_type
== R_386_32
2309 && (sec
->flags
& SEC_CODE
) == 0)
2310 || (ELIMINATE_COPY_RELOCS
2311 && !bfd_link_pic (info
)
2313 && (h
->root
.type
== bfd_link_hash_defweak
2314 || !h
->def_regular
)))
2316 struct elf_dyn_relocs
*p
;
2317 struct elf_dyn_relocs
**head
;
2319 /* We must copy these reloc types into the output file.
2320 Create a reloc section in dynobj and make room for
2324 if (htab
->elf
.dynobj
== NULL
)
2325 htab
->elf
.dynobj
= abfd
;
2327 sreloc
= _bfd_elf_make_dynamic_reloc_section
2328 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
2334 /* If this is a global symbol, we count the number of
2335 relocations we need for this symbol. */
2338 head
= &eh
->dyn_relocs
;
2342 /* Track dynamic relocs needed for local syms too.
2343 We really need local syms available to do this
2348 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2353 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2357 vpp
= &elf_section_data (s
)->local_dynrel
;
2358 head
= (struct elf_dyn_relocs
**)vpp
;
2362 if (p
== NULL
|| p
->sec
!= sec
)
2364 bfd_size_type amt
= sizeof *p
;
2365 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
2377 /* Count size relocation as PC-relative relocation. */
2378 if (r_type
== R_386_PC32
|| size_reloc
)
2383 /* This relocation describes the C++ object vtable hierarchy.
2384 Reconstruct it for later use during GC. */
2385 case R_386_GNU_VTINHERIT
:
2386 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2390 /* This relocation describes which C++ vtable entries are actually
2391 used. Record for later use during GC. */
2392 case R_386_GNU_VTENTRY
:
2393 BFD_ASSERT (h
!= NULL
);
2395 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2403 if (r_type
== R_386_GOT32X
2404 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2405 sec
->need_convert_load
= 1;
2408 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2410 if (!info
->keep_memory
)
2414 /* Cache the section contents for elf_link_input_bfd. */
2415 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2422 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2424 sec
->check_relocs_failed
= 1;
2428 /* Return the section that should be marked against GC for a given
2432 elf_i386_gc_mark_hook (asection
*sec
,
2433 struct bfd_link_info
*info
,
2434 Elf_Internal_Rela
*rel
,
2435 struct elf_link_hash_entry
*h
,
2436 Elf_Internal_Sym
*sym
)
2439 switch (ELF32_R_TYPE (rel
->r_info
))
2441 case R_386_GNU_VTINHERIT
:
2442 case R_386_GNU_VTENTRY
:
2446 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2449 /* Remove undefined weak symbol from the dynamic symbol table if it
2450 is resolved to 0. */
2453 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2454 struct elf_link_hash_entry
*h
)
2456 if (h
->dynindx
!= -1
2457 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2458 elf_i386_hash_entry (h
)->has_got_reloc
,
2459 elf_i386_hash_entry (h
)))
2462 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2468 /* Adjust a symbol defined by a dynamic object and referenced by a
2469 regular object. The current definition is in some section of the
2470 dynamic object, but we're not including those sections. We have to
2471 change the definition to something the rest of the link can
2475 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2476 struct elf_link_hash_entry
*h
)
2478 struct elf_i386_link_hash_table
*htab
;
2480 struct elf_i386_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2483 /* STT_GNU_IFUNC symbol must go through PLT. */
2484 if (h
->type
== STT_GNU_IFUNC
)
2486 /* All local STT_GNU_IFUNC references must be treate as local
2487 calls via local PLT. */
2489 && SYMBOL_CALLS_LOCAL (info
, h
))
2491 bfd_size_type pc_count
= 0, count
= 0;
2492 struct elf_dyn_relocs
**pp
;
2494 eh
= (struct elf_i386_link_hash_entry
*) h
;
2495 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2497 pc_count
+= p
->pc_count
;
2498 p
->count
-= p
->pc_count
;
2507 if (pc_count
|| count
)
2512 /* Increment PLT reference count only for PC-relative
2515 if (h
->plt
.refcount
<= 0)
2516 h
->plt
.refcount
= 1;
2518 h
->plt
.refcount
+= 1;
2523 if (h
->plt
.refcount
<= 0)
2525 h
->plt
.offset
= (bfd_vma
) -1;
2531 /* If this is a function, put it in the procedure linkage table. We
2532 will fill in the contents of the procedure linkage table later,
2533 when we know the address of the .got section. */
2534 if (h
->type
== STT_FUNC
2537 if (h
->plt
.refcount
<= 0
2538 || SYMBOL_CALLS_LOCAL (info
, h
)
2539 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2540 && h
->root
.type
== bfd_link_hash_undefweak
))
2542 /* This case can occur if we saw a PLT32 reloc in an input
2543 file, but the symbol was never referred to by a dynamic
2544 object, or if all references were garbage collected. In
2545 such a case, we don't actually need to build a procedure
2546 linkage table, and we can just do a PC32 reloc instead. */
2547 h
->plt
.offset
= (bfd_vma
) -1;
2554 /* It's possible that we incorrectly decided a .plt reloc was
2555 needed for an R_386_PC32 reloc to a non-function sym in
2556 check_relocs. We can't decide accurately between function and
2557 non-function syms in check-relocs; Objects loaded later in
2558 the link may change h->type. So fix it now. */
2559 h
->plt
.offset
= (bfd_vma
) -1;
2561 /* If this is a weak symbol, and there is a real definition, the
2562 processor independent code will have arranged for us to see the
2563 real definition first, and we can just use the same value. */
2564 if (h
->u
.weakdef
!= NULL
)
2566 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2567 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2568 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2569 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2570 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2571 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2575 /* This is a reference to a symbol defined by a dynamic object which
2576 is not a function. */
2578 /* If we are creating a shared library, we must presume that the
2579 only references to the symbol are via the global offset table.
2580 For such cases we need not do anything here; the relocations will
2581 be handled correctly by relocate_section. */
2582 if (!bfd_link_executable (info
))
2585 /* If there are no references to this symbol that do not use the
2586 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2588 eh
= (struct elf_i386_link_hash_entry
*) h
;
2589 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2592 /* If -z nocopyreloc was given, we won't generate them either. */
2593 if (info
->nocopyreloc
)
2599 htab
= elf_i386_hash_table (info
);
2603 /* If there aren't any dynamic relocs in read-only sections nor
2604 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2605 avoid the copy reloc. This doesn't work on VxWorks, where we can
2606 not have dynamic relocations (other than copy and jump slot
2607 relocations) in an executable. */
2608 if (ELIMINATE_COPY_RELOCS
2610 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2612 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2614 s
= p
->sec
->output_section
;
2615 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2626 /* We must allocate the symbol in our .dynbss section, which will
2627 become part of the .bss section of the executable. There will be
2628 an entry for this symbol in the .dynsym section. The dynamic
2629 object will contain position independent code, so all references
2630 from the dynamic object to this symbol will go through the global
2631 offset table. The dynamic linker will use the .dynsym entry to
2632 determine the address it must put in the global offset table, so
2633 both the dynamic object and the regular object will refer to the
2634 same memory location for the variable. */
2636 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2637 copy the initial value out of the dynamic object and into the
2638 runtime process image. */
2639 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2641 s
= htab
->elf
.sdynrelro
;
2642 srel
= htab
->elf
.sreldynrelro
;
2646 s
= htab
->elf
.sdynbss
;
2647 srel
= htab
->elf
.srelbss
;
2649 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2651 srel
->size
+= sizeof (Elf32_External_Rel
);
2655 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2658 /* Allocate space in .plt, .got and associated reloc sections for
2662 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2664 struct bfd_link_info
*info
;
2665 struct elf_i386_link_hash_table
*htab
;
2666 struct elf_i386_link_hash_entry
*eh
;
2667 struct elf_dyn_relocs
*p
;
2668 unsigned plt_entry_size
;
2669 bfd_boolean resolved_to_zero
;
2671 if (h
->root
.type
== bfd_link_hash_indirect
)
2674 eh
= (struct elf_i386_link_hash_entry
*) h
;
2676 info
= (struct bfd_link_info
*) inf
;
2677 htab
= elf_i386_hash_table (info
);
2681 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2683 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2687 /* Clear the reference count of function pointer relocations if
2688 symbol isn't a normal function. */
2689 if (h
->type
!= STT_FUNC
)
2690 eh
->func_pointer_refcount
= 0;
2692 /* We can't use the GOT PLT if pointer equality is needed since
2693 finish_dynamic_symbol won't clear symbol value and the dynamic
2694 linker won't update the GOT slot. We will get into an infinite
2695 loop at run-time. */
2696 if (htab
->plt_got
!= NULL
2697 && h
->type
!= STT_GNU_IFUNC
2698 && !h
->pointer_equality_needed
2699 && h
->plt
.refcount
> 0
2700 && h
->got
.refcount
> 0)
2702 /* Don't use the regular PLT if there are both GOT and GOTPLT
2704 h
->plt
.offset
= (bfd_vma
) -1;
2706 /* Use the GOT PLT. */
2707 eh
->plt_got
.refcount
= 1;
2710 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2711 here if it is defined and referenced in a non-shared object. */
2712 if (h
->type
== STT_GNU_IFUNC
2714 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2715 &htab
->readonly_dynrelocs_against_ifunc
,
2717 plt_entry_size
, 4, TRUE
);
2718 /* Don't create the PLT entry if there are only function pointer
2719 relocations which can be resolved at run-time. */
2720 else if (htab
->elf
.dynamic_sections_created
2721 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2722 || eh
->plt_got
.refcount
> 0))
2724 bfd_boolean use_plt_got
;
2726 /* Clear the reference count of function pointer relocations
2728 eh
->func_pointer_refcount
= 0;
2730 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2732 /* Don't use the regular PLT for DF_BIND_NOW. */
2733 h
->plt
.offset
= (bfd_vma
) -1;
2735 /* Use the GOT PLT. */
2736 h
->got
.refcount
= 1;
2737 eh
->plt_got
.refcount
= 1;
2740 use_plt_got
= eh
->plt_got
.refcount
> 0;
2742 /* Make sure this symbol is output as a dynamic symbol.
2743 Undefined weak syms won't yet be marked as dynamic. */
2744 if (h
->dynindx
== -1
2746 && !resolved_to_zero
2747 && h
->root
.type
== bfd_link_hash_undefweak
)
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
2870 && h
->root
.type
== bfd_link_hash_undefweak
)
2872 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2877 if (GOT_TLS_GDESC_P (tls_type
))
2879 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2880 - elf_i386_compute_jump_table_size (htab
);
2881 htab
->elf
.sgotplt
->size
+= 8;
2882 h
->got
.offset
= (bfd_vma
) -2;
2884 if (! GOT_TLS_GDESC_P (tls_type
)
2885 || GOT_TLS_GD_P (tls_type
))
2887 h
->got
.offset
= s
->size
;
2889 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2890 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2893 dyn
= htab
->elf
.dynamic_sections_created
;
2894 /* R_386_TLS_IE_32 needs one dynamic relocation,
2895 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2896 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2897 need two), R_386_TLS_GD needs one if local symbol and two if
2898 global. No dynamic relocation against resolved undefined weak
2899 symbol in executable. */
2900 if (tls_type
== GOT_TLS_IE_BOTH
)
2901 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2902 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2903 || (tls_type
& GOT_TLS_IE
))
2904 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2905 else if (GOT_TLS_GD_P (tls_type
))
2906 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2907 else if (! GOT_TLS_GDESC_P (tls_type
)
2908 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2909 && !resolved_to_zero
)
2910 || h
->root
.type
!= bfd_link_hash_undefweak
)
2911 && (bfd_link_pic (info
)
2912 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2913 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2914 if (GOT_TLS_GDESC_P (tls_type
))
2915 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2918 h
->got
.offset
= (bfd_vma
) -1;
2920 if (eh
->dyn_relocs
== NULL
)
2923 /* In the shared -Bsymbolic case, discard space allocated for
2924 dynamic pc-relative relocs against symbols which turn out to be
2925 defined in regular objects. For the normal shared case, discard
2926 space for pc-relative relocs that have become local due to symbol
2927 visibility changes. */
2929 if (bfd_link_pic (info
))
2931 /* The only reloc that uses pc_count is R_386_PC32, which will
2932 appear on a call or on something like ".long foo - .". We
2933 want calls to protected symbols to resolve directly to the
2934 function rather than going via the plt. If people want
2935 function pointer comparisons to work as expected then they
2936 should avoid writing assembly like ".long foo - .". */
2937 if (SYMBOL_CALLS_LOCAL (info
, h
))
2939 struct elf_dyn_relocs
**pp
;
2941 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2943 p
->count
-= p
->pc_count
;
2952 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2954 struct elf_dyn_relocs
**pp
;
2955 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2957 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2964 /* Also discard relocs on undefined weak syms with non-default
2965 visibility or in PIE. */
2966 if (eh
->dyn_relocs
!= NULL
2967 && h
->root
.type
== bfd_link_hash_undefweak
)
2969 /* Undefined weak symbol is never bound locally in shared
2971 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2972 || resolved_to_zero
)
2976 /* Keep dynamic non-GOT/non-PLT relocation so that we
2977 can branch to 0 without PLT. */
2978 struct elf_dyn_relocs
**pp
;
2980 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2981 if (p
->pc_count
== 0)
2985 /* Remove non-R_386_PC32 relocation. */
2986 p
->count
= p
->pc_count
;
2990 if (eh
->dyn_relocs
!= NULL
)
2992 /* Make sure undefined weak symbols are output
2993 as dynamic symbols in PIEs for dynamic non-GOT
2994 non-PLT reloations. */
2995 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3000 eh
->dyn_relocs
= NULL
;
3002 else if (h
->dynindx
== -1
3003 && !h
->forced_local
)
3005 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3010 else if (ELIMINATE_COPY_RELOCS
)
3012 /* For the non-shared case, discard space for relocs against
3013 symbols which turn out to need copy relocs or are not
3014 dynamic. Keep dynamic relocations for run-time function
3015 pointer initialization. */
3017 if ((!h
->non_got_ref
3018 || eh
->func_pointer_refcount
> 0
3019 || (h
->root
.type
== bfd_link_hash_undefweak
3020 && !resolved_to_zero
))
3023 || (htab
->elf
.dynamic_sections_created
3024 && (h
->root
.type
== bfd_link_hash_undefweak
3025 || h
->root
.type
== bfd_link_hash_undefined
))))
3027 /* Make sure this symbol is output as a dynamic symbol.
3028 Undefined weak syms won't yet be marked as dynamic. */
3029 if (h
->dynindx
== -1
3031 && !resolved_to_zero
3032 && h
->root
.type
== bfd_link_hash_undefweak
)
3034 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3038 /* If that succeeded, we know we'll be keeping all the
3040 if (h
->dynindx
!= -1)
3044 eh
->dyn_relocs
= NULL
;
3045 eh
->func_pointer_refcount
= 0;
3050 /* Finally, allocate space. */
3051 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3055 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3057 BFD_ASSERT (sreloc
!= NULL
);
3058 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3064 /* Allocate space in .plt, .got and associated reloc sections for
3065 local dynamic relocs. */
3068 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
3070 struct elf_link_hash_entry
*h
3071 = (struct elf_link_hash_entry
*) *slot
;
3073 if (h
->type
!= STT_GNU_IFUNC
3077 || h
->root
.type
!= bfd_link_hash_defined
)
3080 return elf_i386_allocate_dynrelocs (h
, inf
);
3083 /* Find any dynamic relocs that apply to read-only sections. */
3086 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
3088 struct elf_i386_link_hash_entry
*eh
;
3089 struct elf_dyn_relocs
*p
;
3091 /* Skip local IFUNC symbols. */
3092 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3095 eh
= (struct elf_i386_link_hash_entry
*) h
;
3096 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3098 asection
*s
= p
->sec
->output_section
;
3100 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3102 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3104 info
->flags
|= DF_TEXTREL
;
3106 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3107 || info
->error_textrel
)
3108 /* xgettext:c-format */
3109 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3110 p
->sec
->owner
, h
->root
.root
.string
,
3113 /* Not an error, just cut short the traversal. */
3120 /* Convert load via the GOT slot to load immediate. */
3123 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
3124 struct bfd_link_info
*link_info
)
3126 struct elf_i386_link_hash_table
*htab
;
3127 Elf_Internal_Shdr
*symtab_hdr
;
3128 Elf_Internal_Rela
*internal_relocs
;
3129 Elf_Internal_Rela
*irel
, *irelend
;
3131 bfd_boolean changed
;
3132 bfd_signed_vma
*local_got_refcounts
;
3134 /* Don't even try to convert non-ELF outputs. */
3135 if (!is_elf_hash_table (link_info
->hash
))
3138 /* Nothing to do if there is no need or no output. */
3139 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3140 || sec
->need_convert_load
== 0
3141 || bfd_is_abs_section (sec
->output_section
))
3144 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3146 /* Load the relocations for this section. */
3147 internal_relocs
= (_bfd_elf_link_read_relocs
3148 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3149 link_info
->keep_memory
));
3150 if (internal_relocs
== NULL
)
3154 htab
= elf_i386_hash_table (link_info
);
3155 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3157 /* Get the section contents. */
3158 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3159 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3162 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3166 irelend
= internal_relocs
+ sec
->reloc_count
;
3167 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3169 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3170 unsigned int r_symndx
;
3171 struct elf_link_hash_entry
*h
;
3172 bfd_boolean converted
;
3174 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3175 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3176 if (r_type
!= R_386_GOT32X
)
3179 r_symndx
= ELF32_R_SYM (irel
->r_info
);
3180 if (r_symndx
< symtab_hdr
->sh_info
)
3181 h
= elf_i386_get_local_sym_hash (htab
, sec
->owner
,
3182 (const Elf_Internal_Rela
*) irel
,
3186 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3187 while (h
->root
.type
== bfd_link_hash_indirect
3188 || h
->root
.type
== bfd_link_hash_warning
)
3189 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3192 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3193 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3197 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
3198 irel
, h
, &converted
, link_info
))
3203 changed
= converted
;
3206 if (h
->got
.refcount
> 0)
3207 h
->got
.refcount
-= 1;
3211 if (local_got_refcounts
!= NULL
3212 && local_got_refcounts
[r_symndx
] > 0)
3213 local_got_refcounts
[r_symndx
] -= 1;
3218 if (contents
!= NULL
3219 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3221 if (!changed
&& !link_info
->keep_memory
)
3225 /* Cache the section contents for elf_link_input_bfd. */
3226 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3230 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3233 free (internal_relocs
);
3235 elf_section_data (sec
)->relocs
= internal_relocs
;
3241 if (contents
!= NULL
3242 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3244 if (internal_relocs
!= NULL
3245 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3246 free (internal_relocs
);
3250 /* Set the sizes of the dynamic sections. */
3253 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3255 struct elf_i386_link_hash_table
*htab
;
3261 htab
= elf_i386_hash_table (info
);
3264 dynobj
= htab
->elf
.dynobj
;
3268 /* Set up .got offsets for local syms, and space for local dynamic
3270 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3272 bfd_signed_vma
*local_got
;
3273 bfd_signed_vma
*end_local_got
;
3274 char *local_tls_type
;
3275 bfd_vma
*local_tlsdesc_gotent
;
3276 bfd_size_type locsymcount
;
3277 Elf_Internal_Shdr
*symtab_hdr
;
3280 if (! is_i386_elf (ibfd
))
3283 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3285 struct elf_dyn_relocs
*p
;
3287 if (!elf_i386_convert_load (ibfd
, s
, info
))
3290 for (p
= ((struct elf_dyn_relocs
*)
3291 elf_section_data (s
)->local_dynrel
);
3295 if (!bfd_is_abs_section (p
->sec
)
3296 && bfd_is_abs_section (p
->sec
->output_section
))
3298 /* Input section has been discarded, either because
3299 it is a copy of a linkonce section or due to
3300 linker script /DISCARD/, so we'll be discarding
3303 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3304 && strcmp (p
->sec
->output_section
->name
,
3307 /* Relocations in vxworks .tls_vars sections are
3308 handled specially by the loader. */
3310 else if (p
->count
!= 0)
3312 srel
= elf_section_data (p
->sec
)->sreloc
;
3313 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3314 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3315 && (info
->flags
& DF_TEXTREL
) == 0)
3317 info
->flags
|= DF_TEXTREL
;
3318 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3319 || info
->error_textrel
)
3320 /* xgettext:c-format */
3321 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3322 p
->sec
->owner
, p
->sec
);
3328 local_got
= elf_local_got_refcounts (ibfd
);
3332 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3333 locsymcount
= symtab_hdr
->sh_info
;
3334 end_local_got
= local_got
+ locsymcount
;
3335 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3336 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3338 srel
= htab
->elf
.srelgot
;
3339 for (; local_got
< end_local_got
;
3340 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3342 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3345 if (GOT_TLS_GDESC_P (*local_tls_type
))
3347 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3348 - elf_i386_compute_jump_table_size (htab
);
3349 htab
->elf
.sgotplt
->size
+= 8;
3350 *local_got
= (bfd_vma
) -2;
3352 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3353 || GOT_TLS_GD_P (*local_tls_type
))
3355 *local_got
= s
->size
;
3357 if (GOT_TLS_GD_P (*local_tls_type
)
3358 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3361 if (bfd_link_pic (info
)
3362 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3363 || (*local_tls_type
& GOT_TLS_IE
))
3365 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3366 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3367 else if (GOT_TLS_GD_P (*local_tls_type
)
3368 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3369 srel
->size
+= sizeof (Elf32_External_Rel
);
3370 if (GOT_TLS_GDESC_P (*local_tls_type
))
3371 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3375 *local_got
= (bfd_vma
) -1;
3379 if (htab
->tls_ldm_got
.refcount
> 0)
3381 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3383 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3384 htab
->elf
.sgot
->size
+= 8;
3385 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3388 htab
->tls_ldm_got
.offset
= -1;
3390 /* Allocate global sym .plt and .got entries, and space for global
3391 sym dynamic relocs. */
3392 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3394 /* Allocate .plt and .got entries, and space for local symbols. */
3395 htab_traverse (htab
->loc_hash_table
,
3396 elf_i386_allocate_local_dynrelocs
,
3399 /* For every jump slot reserved in the sgotplt, reloc_count is
3400 incremented. However, when we reserve space for TLS descriptors,
3401 it's not incremented, so in order to compute the space reserved
3402 for them, it suffices to multiply the reloc count by the jump
3405 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3406 so that R_386_IRELATIVE entries come last. */
3407 if (htab
->elf
.srelplt
)
3409 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3410 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3411 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3413 else if (htab
->elf
.irelplt
)
3414 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3417 if (htab
->elf
.sgotplt
)
3419 /* Don't allocate .got.plt section if there are no GOT nor PLT
3420 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3421 if ((htab
->elf
.hgot
== NULL
3422 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3423 && (htab
->elf
.sgotplt
->size
3424 == get_elf_backend_data (output_bfd
)->got_header_size
)
3425 && (htab
->elf
.splt
== NULL
3426 || htab
->elf
.splt
->size
== 0)
3427 && (htab
->elf
.sgot
== NULL
3428 || htab
->elf
.sgot
->size
== 0)
3429 && (htab
->elf
.iplt
== NULL
3430 || htab
->elf
.iplt
->size
== 0)
3431 && (htab
->elf
.igotplt
== NULL
3432 || htab
->elf
.igotplt
->size
== 0))
3433 htab
->elf
.sgotplt
->size
= 0;
3436 if (_bfd_elf_eh_frame_present (info
))
3438 if (htab
->plt_eh_frame
!= NULL
3439 && htab
->elf
.splt
!= NULL
3440 && htab
->elf
.splt
->size
!= 0
3441 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3442 htab
->plt_eh_frame
->size
3443 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_size
;
3445 if (htab
->plt_got_eh_frame
!= NULL
3446 && htab
->plt_got
!= NULL
3447 && htab
->plt_got
->size
!= 0
3448 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3449 htab
->plt_got_eh_frame
->size
3450 = get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got_size
;
3453 /* We now have determined the sizes of the various dynamic sections.
3454 Allocate memory for them. */
3456 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3458 bfd_boolean strip_section
= TRUE
;
3460 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3463 if (s
== htab
->elf
.splt
3464 || s
== htab
->elf
.sgot
)
3466 /* Strip this section if we don't need it; see the
3468 /* We'd like to strip these sections if they aren't needed, but if
3469 we've exported dynamic symbols from them we must leave them.
3470 It's too late to tell BFD to get rid of the symbols. */
3472 if (htab
->elf
.hplt
!= NULL
)
3473 strip_section
= FALSE
;
3475 else if (s
== htab
->elf
.sgotplt
3476 || s
== htab
->elf
.iplt
3477 || s
== htab
->elf
.igotplt
3478 || s
== htab
->plt_got
3479 || s
== htab
->plt_eh_frame
3480 || s
== htab
->plt_got_eh_frame
3481 || s
== htab
->elf
.sdynbss
3482 || s
== htab
->elf
.sdynrelro
)
3484 /* Strip these too. */
3486 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3489 && s
!= htab
->elf
.srelplt
3490 && s
!= htab
->srelplt2
)
3493 /* We use the reloc_count field as a counter if we need
3494 to copy relocs into the output file. */
3499 /* It's not one of our sections, so don't allocate space. */
3505 /* If we don't need this section, strip it from the
3506 output file. This is mostly to handle .rel.bss and
3507 .rel.plt. We must create both sections in
3508 create_dynamic_sections, because they must be created
3509 before the linker maps input sections to output
3510 sections. The linker does that before
3511 adjust_dynamic_symbol is called, and it is that
3512 function which decides whether anything needs to go
3513 into these sections. */
3515 s
->flags
|= SEC_EXCLUDE
;
3519 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3522 /* Allocate memory for the section contents. We use bfd_zalloc
3523 here in case unused entries are not reclaimed before the
3524 section's contents are written out. This should not happen,
3525 but this way if it does, we get a R_386_NONE reloc instead
3527 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3528 if (s
->contents
== NULL
)
3532 if (htab
->plt_eh_frame
!= NULL
3533 && htab
->plt_eh_frame
->contents
!= NULL
)
3535 memcpy (htab
->plt_eh_frame
->contents
,
3536 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt
,
3537 htab
->plt_eh_frame
->size
);
3538 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3539 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3542 if (htab
->plt_got_eh_frame
!= NULL
3543 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3545 memcpy (htab
->plt_got_eh_frame
->contents
,
3546 get_elf_i386_backend_data (output_bfd
)->plt
->eh_frame_plt_got
,
3547 htab
->plt_got_eh_frame
->size
);
3548 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3549 (htab
->plt_got_eh_frame
->contents
3550 + PLT_FDE_LEN_OFFSET
));
3553 if (htab
->elf
.dynamic_sections_created
)
3555 /* Add some entries to the .dynamic section. We fill in the
3556 values later, in elf_i386_finish_dynamic_sections, but we
3557 must add the entries now so that we get the correct size for
3558 the .dynamic section. The DT_DEBUG entry is filled in by the
3559 dynamic linker and used by the debugger. */
3560 #define add_dynamic_entry(TAG, VAL) \
3561 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3563 if (bfd_link_executable (info
))
3565 if (!add_dynamic_entry (DT_DEBUG
, 0))
3569 if (htab
->elf
.splt
->size
!= 0)
3571 /* DT_PLTGOT is used by prelink even if there is no PLT
3573 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3577 if (htab
->elf
.srelplt
->size
!= 0)
3579 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3580 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3581 || !add_dynamic_entry (DT_JMPREL
, 0))
3587 if (!add_dynamic_entry (DT_REL
, 0)
3588 || !add_dynamic_entry (DT_RELSZ
, 0)
3589 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3592 /* If any dynamic relocs apply to a read-only section,
3593 then we need a DT_TEXTREL entry. */
3594 if ((info
->flags
& DF_TEXTREL
) == 0)
3595 elf_link_hash_traverse (&htab
->elf
,
3596 elf_i386_readonly_dynrelocs
, info
);
3598 if ((info
->flags
& DF_TEXTREL
) != 0)
3600 if (htab
->readonly_dynrelocs_against_ifunc
)
3602 info
->callbacks
->einfo
3603 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3604 bfd_set_error (bfd_error_bad_value
);
3608 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3612 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3613 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3616 #undef add_dynamic_entry
3622 elf_i386_always_size_sections (bfd
*output_bfd
,
3623 struct bfd_link_info
*info
)
3625 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3629 struct elf_link_hash_entry
*tlsbase
;
3631 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3632 "_TLS_MODULE_BASE_",
3633 FALSE
, FALSE
, FALSE
);
3635 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3637 struct elf_i386_link_hash_table
*htab
;
3638 struct bfd_link_hash_entry
*bh
= NULL
;
3639 const struct elf_backend_data
*bed
3640 = get_elf_backend_data (output_bfd
);
3642 htab
= elf_i386_hash_table (info
);
3646 if (!(_bfd_generic_link_add_one_symbol
3647 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3648 tls_sec
, 0, NULL
, FALSE
,
3649 bed
->collect
, &bh
)))
3652 htab
->tls_module_base
= bh
;
3654 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3655 tlsbase
->def_regular
= 1;
3656 tlsbase
->other
= STV_HIDDEN
;
3657 tlsbase
->root
.linker_def
= 1;
3658 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3665 /* Set the correct type for an x86 ELF section. We do this by the
3666 section name, which is a hack, but ought to work. */
3669 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3670 Elf_Internal_Shdr
*hdr
,
3675 name
= bfd_get_section_name (abfd
, sec
);
3677 /* This is an ugly, but unfortunately necessary hack that is
3678 needed when producing EFI binaries on x86. It tells
3679 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3680 containing ELF relocation info. We need this hack in order to
3681 be able to generate ELF binaries that can be translated into
3682 EFI applications (which are essentially COFF objects). Those
3683 files contain a COFF ".reloc" section inside an ELFNN object,
3684 which would normally cause BFD to segfault because it would
3685 attempt to interpret this section as containing relocation
3686 entries for section "oc". With this hack enabled, ".reloc"
3687 will be treated as a normal data section, which will avoid the
3688 segfault. However, you won't be able to create an ELFNN binary
3689 with a section named "oc" that needs relocations, but that's
3690 the kind of ugly side-effects you get when detecting section
3691 types based on their names... In practice, this limitation is
3692 unlikely to bite. */
3693 if (strcmp (name
, ".reloc") == 0)
3694 hdr
->sh_type
= SHT_PROGBITS
;
3699 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3700 executables. Rather than setting it to the beginning of the TLS
3701 section, we have to set it to the end. This function may be called
3702 multiple times, it is idempotent. */
3705 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3707 struct elf_i386_link_hash_table
*htab
;
3708 struct bfd_link_hash_entry
*base
;
3710 if (!bfd_link_executable (info
))
3713 htab
= elf_i386_hash_table (info
);
3717 base
= htab
->tls_module_base
;
3721 base
->u
.def
.value
= htab
->elf
.tls_size
;
3724 /* Return the base VMA address which should be subtracted from real addresses
3725 when resolving @dtpoff relocation.
3726 This is PT_TLS segment p_vaddr. */
3729 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3731 /* If tls_sec is NULL, we should have signalled an error already. */
3732 if (elf_hash_table (info
)->tls_sec
== NULL
)
3734 return elf_hash_table (info
)->tls_sec
->vma
;
3737 /* Return the relocation value for @tpoff relocation
3738 if STT_TLS virtual address is ADDRESS. */
3741 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3743 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3744 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3745 bfd_vma static_tls_size
;
3747 /* If tls_sec is NULL, we should have signalled an error already. */
3748 if (htab
->tls_sec
== NULL
)
3751 /* Consider special static TLS alignment requirements. */
3752 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3753 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3756 /* Relocate an i386 ELF section. */
3759 elf_i386_relocate_section (bfd
*output_bfd
,
3760 struct bfd_link_info
*info
,
3762 asection
*input_section
,
3764 Elf_Internal_Rela
*relocs
,
3765 Elf_Internal_Sym
*local_syms
,
3766 asection
**local_sections
)
3768 struct elf_i386_link_hash_table
*htab
;
3769 Elf_Internal_Shdr
*symtab_hdr
;
3770 struct elf_link_hash_entry
**sym_hashes
;
3771 bfd_vma
*local_got_offsets
;
3772 bfd_vma
*local_tlsdesc_gotents
;
3773 Elf_Internal_Rela
*rel
;
3774 Elf_Internal_Rela
*wrel
;
3775 Elf_Internal_Rela
*relend
;
3776 bfd_boolean is_vxworks_tls
;
3777 unsigned plt_entry_size
;
3779 BFD_ASSERT (is_i386_elf (input_bfd
));
3781 /* Skip if check_relocs failed. */
3782 if (input_section
->check_relocs_failed
)
3785 htab
= elf_i386_hash_table (info
);
3788 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3789 sym_hashes
= elf_sym_hashes (input_bfd
);
3790 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3791 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3792 /* We have to handle relocations in vxworks .tls_vars sections
3793 specially, because the dynamic loader is 'weird'. */
3794 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3795 && bfd_link_pic (info
)
3796 && !strcmp (input_section
->output_section
->name
,
3799 elf_i386_set_tls_module_base (info
);
3801 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3803 rel
= wrel
= relocs
;
3804 relend
= relocs
+ input_section
->reloc_count
;
3805 for (; rel
< relend
; wrel
++, rel
++)
3807 unsigned int r_type
;
3808 reloc_howto_type
*howto
;
3809 unsigned long r_symndx
;
3810 struct elf_link_hash_entry
*h
;
3811 struct elf_i386_link_hash_entry
*eh
;
3812 Elf_Internal_Sym
*sym
;
3814 bfd_vma off
, offplt
, plt_offset
;
3816 bfd_boolean unresolved_reloc
;
3817 bfd_reloc_status_type r
;
3821 asection
*resolved_plt
;
3822 bfd_boolean resolved_to_zero
;
3823 bfd_boolean relative_reloc
;
3825 r_type
= ELF32_R_TYPE (rel
->r_info
);
3826 if (r_type
== R_386_GNU_VTINHERIT
3827 || r_type
== R_386_GNU_VTENTRY
)
3834 if ((indx
= r_type
) >= R_386_standard
3835 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3836 >= R_386_ext
- R_386_standard
)
3837 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3838 >= R_386_ext2
- R_386_ext
))
3841 /* xgettext:c-format */
3842 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3843 input_bfd
, r_type
, input_section
);
3844 bfd_set_error (bfd_error_bad_value
);
3847 howto
= elf_howto_table
+ indx
;
3849 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3853 unresolved_reloc
= FALSE
;
3854 if (r_symndx
< symtab_hdr
->sh_info
)
3856 sym
= local_syms
+ r_symndx
;
3857 sec
= local_sections
[r_symndx
];
3858 relocation
= (sec
->output_section
->vma
3859 + sec
->output_offset
3861 st_size
= sym
->st_size
;
3863 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3864 && ((sec
->flags
& SEC_MERGE
) != 0
3865 || (bfd_link_relocatable (info
)
3866 && sec
->output_offset
!= 0)))
3869 bfd_byte
*where
= contents
+ rel
->r_offset
;
3871 switch (howto
->size
)
3874 addend
= bfd_get_8 (input_bfd
, where
);
3875 if (howto
->pc_relative
)
3877 addend
= (addend
^ 0x80) - 0x80;
3882 addend
= bfd_get_16 (input_bfd
, where
);
3883 if (howto
->pc_relative
)
3885 addend
= (addend
^ 0x8000) - 0x8000;
3890 addend
= bfd_get_32 (input_bfd
, where
);
3891 if (howto
->pc_relative
)
3893 addend
= (addend
^ 0x80000000) - 0x80000000;
3901 if (bfd_link_relocatable (info
))
3902 addend
+= sec
->output_offset
;
3905 asection
*msec
= sec
;
3906 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3908 addend
-= relocation
;
3909 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3912 switch (howto
->size
)
3915 /* FIXME: overflow checks. */
3916 if (howto
->pc_relative
)
3918 bfd_put_8 (input_bfd
, addend
, where
);
3921 if (howto
->pc_relative
)
3923 bfd_put_16 (input_bfd
, addend
, where
);
3926 if (howto
->pc_relative
)
3928 bfd_put_32 (input_bfd
, addend
, where
);
3932 else if (!bfd_link_relocatable (info
)
3933 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3935 /* Relocate against local STT_GNU_IFUNC symbol. */
3936 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3941 /* Set STT_GNU_IFUNC symbol value. */
3942 h
->root
.u
.def
.value
= sym
->st_value
;
3943 h
->root
.u
.def
.section
= sec
;
3948 bfd_boolean warned ATTRIBUTE_UNUSED
;
3949 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3951 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3952 r_symndx
, symtab_hdr
, sym_hashes
,
3954 unresolved_reloc
, warned
, ignored
);
3958 if (sec
!= NULL
&& discarded_section (sec
))
3960 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3961 contents
+ rel
->r_offset
);
3962 wrel
->r_offset
= rel
->r_offset
;
3966 /* For ld -r, remove relocations in debug sections against
3967 sections defined in discarded sections. Not done for
3968 eh_frame editing code expects to be present. */
3969 if (bfd_link_relocatable (info
)
3970 && (input_section
->flags
& SEC_DEBUGGING
))
3976 if (bfd_link_relocatable (info
))
3983 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3984 it here if it is defined in a non-shared object. */
3986 && h
->type
== STT_GNU_IFUNC
3989 asection
*plt
, *gotplt
, *base_got
;
3993 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3995 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3996 sections because such sections are not SEC_ALLOC and
3997 thus ld.so will not process them. */
3998 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
4003 /* STT_GNU_IFUNC symbol must go through PLT. */
4004 if (htab
->elf
.splt
!= NULL
)
4006 plt
= htab
->elf
.splt
;
4007 gotplt
= htab
->elf
.sgotplt
;
4011 plt
= htab
->elf
.iplt
;
4012 gotplt
= htab
->elf
.igotplt
;
4022 base_got
= htab
->elf
.sgot
;
4023 off
= h
->got
.offset
;
4025 if (base_got
== NULL
)
4028 if (off
== (bfd_vma
) -1)
4030 /* We can't use h->got.offset here to save state, or
4031 even just remember the offset, as finish_dynamic_symbol
4032 would use that as offset into .got. */
4034 if (h
->plt
.offset
== (bfd_vma
) -1)
4037 if (htab
->elf
.splt
!= NULL
)
4039 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
4040 off
= (plt_index
+ 3) * 4;
4041 base_got
= htab
->elf
.sgotplt
;
4045 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4046 off
= plt_index
* 4;
4047 base_got
= htab
->elf
.igotplt
;
4050 if (h
->dynindx
== -1
4054 /* This references the local defitionion. We must
4055 initialize this entry in the global offset table.
4056 Since the offset must always be a multiple of 8,
4057 we use the least significant bit to record
4058 whether we have initialized it already.
4060 When doing a dynamic link, we create a .rela.got
4061 relocation entry to initialize the value. This
4062 is done in the finish_dynamic_symbol routine. */
4067 bfd_put_32 (output_bfd
, relocation
,
4068 base_got
->contents
+ off
);
4076 relocation
= (base_got
->output_section
->vma
4077 + base_got
->output_offset
+ off
4078 - gotplt
->output_section
->vma
4079 - gotplt
->output_offset
);
4081 if (rel
->r_offset
> 1
4082 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4083 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4085 if (bfd_link_pic (info
))
4086 goto disallow_got32
;
4088 /* Add the GOT base if there is no base register. */
4089 relocation
+= (gotplt
->output_section
->vma
4090 + gotplt
->output_offset
);
4092 else if (htab
->elf
.splt
== NULL
)
4094 /* Adjust for static executables. */
4095 relocation
+= gotplt
->output_offset
;
4101 if (h
->plt
.offset
== (bfd_vma
) -1)
4103 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4104 if (r_type
== R_386_32
4105 && (input_section
->flags
& SEC_CODE
) == 0)
4106 goto do_ifunc_pointer
;
4107 goto bad_ifunc_reloc
;
4110 relocation
= (plt
->output_section
->vma
4111 + plt
->output_offset
+ h
->plt
.offset
);
4117 if (h
->root
.root
.string
)
4118 name
= h
->root
.root
.string
;
4120 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4123 /* xgettext:c-format */
4124 (_("%B: relocation %s against STT_GNU_IFUNC "
4125 "symbol `%s' isn't supported"), input_bfd
,
4127 bfd_set_error (bfd_error_bad_value
);
4131 /* Generate dynamic relcoation only when there is a
4132 non-GOT reference in a shared object. */
4133 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4134 || h
->plt
.offset
== (bfd_vma
) -1)
4136 Elf_Internal_Rela outrel
;
4141 /* Need a dynamic relocation to get the real function
4143 offset
= _bfd_elf_section_offset (output_bfd
,
4147 if (offset
== (bfd_vma
) -1
4148 || offset
== (bfd_vma
) -2)
4151 outrel
.r_offset
= (input_section
->output_section
->vma
4152 + input_section
->output_offset
4155 if (h
->dynindx
== -1
4157 || bfd_link_executable (info
))
4159 /* This symbol is resolved locally. */
4160 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4161 bfd_put_32 (output_bfd
,
4162 (h
->root
.u
.def
.value
4163 + h
->root
.u
.def
.section
->output_section
->vma
4164 + h
->root
.u
.def
.section
->output_offset
),
4168 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4170 /* Dynamic relocations are stored in
4171 1. .rel.ifunc section in PIC object.
4172 2. .rel.got section in dynamic executable.
4173 3. .rel.iplt section in static executable. */
4174 if (bfd_link_pic (info
))
4175 sreloc
= htab
->elf
.irelifunc
;
4176 else if (htab
->elf
.splt
!= NULL
)
4177 sreloc
= htab
->elf
.srelgot
;
4179 sreloc
= htab
->elf
.irelplt
;
4180 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4182 /* If this reloc is against an external symbol, we
4183 do not want to fiddle with the addend. Otherwise,
4184 we need to include the symbol value so that it
4185 becomes an addend for the dynamic reloc. For an
4186 internal symbol, we have updated addend. */
4195 relocation
-= (gotplt
->output_section
->vma
4196 + gotplt
->output_offset
);
4201 eh
= (struct elf_i386_link_hash_entry
*) h
;
4202 resolved_to_zero
= (eh
!= NULL
4203 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4210 /* Avoid optimizing _DYNAMIC since ld.so may use its
4211 link-time address. */
4212 if (h
== htab
->elf
.hdynamic
)
4215 if (bfd_link_pic (info
))
4217 /* It is OK to convert mov to lea and convert indirect
4218 branch to direct branch. It is OK to convert adc,
4219 add, and, cmp, or, sbb, sub, test, xor only when PIC
4221 unsigned int opcode
, addend
;
4222 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4225 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4226 if (opcode
!= 0x8b && opcode
!= 0xff)
4230 /* Resolve "mov GOT[(%reg)], %reg",
4231 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4232 and "binop foo@GOT[(%reg)], %reg". */
4234 || (h
->plt
.offset
== (bfd_vma
) -1
4235 && h
->got
.offset
== (bfd_vma
) -1)
4236 || htab
->elf
.sgotplt
== NULL
)
4239 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4240 + htab
->elf
.sgotplt
->output_offset
);
4242 /* It is relative to .got.plt section. */
4243 if (h
->got
.offset
!= (bfd_vma
) -1)
4244 /* Use GOT entry. Mask off the least significant bit in
4245 GOT offset which may be set by R_386_GOT32 processing
4247 relocation
= (htab
->elf
.sgot
->output_section
->vma
4248 + htab
->elf
.sgot
->output_offset
4249 + (h
->got
.offset
& ~1) - offplt
);
4251 /* Use GOTPLT entry. */
4252 relocation
= (h
->plt
.offset
/ plt_entry_size
- 1 + 3) * 4;
4254 if (!bfd_link_pic (info
))
4256 /* If not PIC, add the .got.plt section address for
4257 baseless addressing. */
4259 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4260 if ((modrm
& 0xc7) == 0x5)
4261 relocation
+= offplt
;
4264 unresolved_reloc
= FALSE
;
4269 /* Relocation is to the entry for this symbol in the global
4271 if (htab
->elf
.sgot
== NULL
)
4274 relative_reloc
= FALSE
;
4279 off
= h
->got
.offset
;
4280 dyn
= htab
->elf
.dynamic_sections_created
;
4281 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4282 bfd_link_pic (info
),
4284 || (bfd_link_pic (info
)
4285 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4286 || (ELF_ST_VISIBILITY (h
->other
)
4287 && h
->root
.type
== bfd_link_hash_undefweak
))
4289 /* This is actually a static link, or it is a
4290 -Bsymbolic link and the symbol is defined
4291 locally, or the symbol was forced to be local
4292 because of a version file. We must initialize
4293 this entry in the global offset table. Since the
4294 offset must always be a multiple of 4, we use the
4295 least significant bit to record whether we have
4296 initialized it already.
4298 When doing a dynamic link, we create a .rel.got
4299 relocation entry to initialize the value. This
4300 is done in the finish_dynamic_symbol routine. */
4305 bfd_put_32 (output_bfd
, relocation
,
4306 htab
->elf
.sgot
->contents
+ off
);
4309 if (h
->dynindx
== -1
4311 && h
->root
.type
!= bfd_link_hash_undefweak
4312 && bfd_link_pic (info
))
4314 /* PR ld/21402: If this symbol isn't dynamic
4315 in PIC, generate R_386_RELATIVE here. */
4316 eh
->no_finish_dynamic_symbol
= 1;
4317 relative_reloc
= TRUE
;
4322 unresolved_reloc
= FALSE
;
4326 if (local_got_offsets
== NULL
)
4329 off
= local_got_offsets
[r_symndx
];
4331 /* The offset must always be a multiple of 4. We use
4332 the least significant bit to record whether we have
4333 already generated the necessary reloc. */
4338 bfd_put_32 (output_bfd
, relocation
,
4339 htab
->elf
.sgot
->contents
+ off
);
4340 local_got_offsets
[r_symndx
] |= 1;
4342 if (bfd_link_pic (info
))
4343 relative_reloc
= TRUE
;
4350 Elf_Internal_Rela outrel
;
4352 s
= htab
->elf
.srelgot
;
4356 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4357 + htab
->elf
.sgot
->output_offset
4359 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4360 elf_append_rel (output_bfd
, s
, &outrel
);
4363 if (off
>= (bfd_vma
) -2)
4366 relocation
= (htab
->elf
.sgot
->output_section
->vma
4367 + htab
->elf
.sgot
->output_offset
+ off
);
4368 if (rel
->r_offset
> 1
4369 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4370 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4372 if (bfd_link_pic (info
))
4374 /* For PIC, disallow R_386_GOT32 without a base
4375 register, except for "lea foo@GOT, %reg", since
4376 we don't know what the GOT base is. */
4380 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
4381 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4384 name
= h
->root
.root
.string
;
4387 /* xgettext:c-format */
4388 (_("%B: direct GOT relocation %s against `%s'"
4389 " without base register can not be used"
4390 " when making a shared object"),
4391 input_bfd
, howto
->name
, name
);
4392 bfd_set_error (bfd_error_bad_value
);
4398 /* Subtract the .got.plt section address only with a base
4400 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
4401 + htab
->elf
.sgotplt
->output_offset
);
4407 /* Relocation is relative to the start of the global offset
4410 /* Check to make sure it isn't a protected function or data
4411 symbol for shared library since it may not be local when
4412 used as function address or with copy relocation. We also
4413 need to make sure that a symbol is referenced locally. */
4414 if (!bfd_link_executable (info
) && h
)
4416 if (!h
->def_regular
)
4420 switch (ELF_ST_VISIBILITY (h
->other
))
4423 v
= _("hidden symbol");
4426 v
= _("internal symbol");
4429 v
= _("protected symbol");
4437 /* xgettext:c-format */
4438 (_("%B: relocation R_386_GOTOFF against undefined %s"
4439 " `%s' can not be used when making a shared object"),
4440 input_bfd
, v
, h
->root
.root
.string
);
4441 bfd_set_error (bfd_error_bad_value
);
4444 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4445 && (h
->type
== STT_FUNC
4446 || h
->type
== STT_OBJECT
)
4447 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4450 /* xgettext:c-format */
4451 (_("%B: relocation R_386_GOTOFF against protected %s"
4452 " `%s' can not be used when making a shared object"),
4454 h
->type
== STT_FUNC
? "function" : "data",
4455 h
->root
.root
.string
);
4456 bfd_set_error (bfd_error_bad_value
);
4461 /* Note that sgot is not involved in this
4462 calculation. We always want the start of .got.plt. If we
4463 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4464 permitted by the ABI, we might have to change this
4466 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4467 + htab
->elf
.sgotplt
->output_offset
;
4471 /* Use global offset table as symbol value. */
4472 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4473 + htab
->elf
.sgotplt
->output_offset
;
4474 unresolved_reloc
= FALSE
;
4478 /* Relocation is to the entry for this symbol in the
4479 procedure linkage table. */
4481 /* Resolve a PLT32 reloc against a local symbol directly,
4482 without using the procedure linkage table. */
4486 if ((h
->plt
.offset
== (bfd_vma
) -1
4487 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4488 || htab
->elf
.splt
== NULL
)
4490 /* We didn't make a PLT entry for this symbol. This
4491 happens when statically linking PIC code, or when
4492 using -Bsymbolic. */
4496 if (h
->plt
.offset
!= (bfd_vma
) -1)
4498 resolved_plt
= htab
->elf
.splt
;
4499 plt_offset
= h
->plt
.offset
;
4503 resolved_plt
= htab
->plt_got
;
4504 plt_offset
= eh
->plt_got
.offset
;
4507 relocation
= (resolved_plt
->output_section
->vma
4508 + resolved_plt
->output_offset
4510 unresolved_reloc
= FALSE
;
4514 /* Set to symbol size. */
4515 relocation
= st_size
;
4520 if ((input_section
->flags
& SEC_ALLOC
) == 0
4524 /* Copy dynamic function pointer relocations. Don't generate
4525 dynamic relocations against resolved undefined weak symbols
4526 in PIE, except for R_386_PC32. */
4527 if ((bfd_link_pic (info
)
4529 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4530 && (!resolved_to_zero
4531 || r_type
== R_386_PC32
))
4532 || h
->root
.type
!= bfd_link_hash_undefweak
))
4533 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4534 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4535 || (ELIMINATE_COPY_RELOCS
4536 && !bfd_link_pic (info
)
4540 || eh
->func_pointer_refcount
> 0
4541 || (h
->root
.type
== bfd_link_hash_undefweak
4542 && !resolved_to_zero
))
4543 && ((h
->def_dynamic
&& !h
->def_regular
)
4544 /* Undefined weak symbol is bound locally when
4546 || h
->root
.type
== bfd_link_hash_undefweak
)))
4548 Elf_Internal_Rela outrel
;
4549 bfd_boolean skip
, relocate
;
4552 /* When generating a shared object, these relocations
4553 are copied into the output file to be resolved at run
4560 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4562 if (outrel
.r_offset
== (bfd_vma
) -1)
4564 else if (outrel
.r_offset
== (bfd_vma
) -2)
4565 skip
= TRUE
, relocate
= TRUE
;
4566 outrel
.r_offset
+= (input_section
->output_section
->vma
4567 + input_section
->output_offset
);
4570 memset (&outrel
, 0, sizeof outrel
);
4573 && (r_type
== R_386_PC32
4574 || !(bfd_link_executable (info
)
4575 || SYMBOLIC_BIND (info
, h
))
4576 || !h
->def_regular
))
4577 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4580 /* This symbol is local, or marked to become local. */
4582 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4585 sreloc
= elf_section_data (input_section
)->sreloc
;
4587 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4589 r
= bfd_reloc_notsupported
;
4590 goto check_relocation_error
;
4593 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4595 /* If this reloc is against an external symbol, we do
4596 not want to fiddle with the addend. Otherwise, we
4597 need to include the symbol value so that it becomes
4598 an addend for the dynamic reloc. */
4605 if (!bfd_link_executable (info
))
4607 Elf_Internal_Rela outrel
;
4610 outrel
.r_offset
= rel
->r_offset
4611 + input_section
->output_section
->vma
4612 + input_section
->output_offset
;
4613 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4614 sreloc
= elf_section_data (input_section
)->sreloc
;
4617 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4622 case R_386_TLS_GOTDESC
:
4623 case R_386_TLS_DESC_CALL
:
4624 case R_386_TLS_IE_32
:
4625 case R_386_TLS_GOTIE
:
4626 tls_type
= GOT_UNKNOWN
;
4627 if (h
== NULL
&& local_got_offsets
)
4628 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4630 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4631 if (tls_type
== GOT_TLS_IE
)
4632 tls_type
= GOT_TLS_IE_NEG
;
4634 if (! elf_i386_tls_transition (info
, input_bfd
,
4635 input_section
, contents
,
4636 symtab_hdr
, sym_hashes
,
4637 &r_type
, tls_type
, rel
,
4638 relend
, h
, r_symndx
, TRUE
))
4641 if (r_type
== R_386_TLS_LE_32
)
4643 BFD_ASSERT (! unresolved_reloc
);
4644 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4649 /* GD->LE transition. */
4650 type
= *(contents
+ rel
->r_offset
- 2);
4654 leal foo@tlsgd(,%ebx,1), %eax
4655 call ___tls_get_addr@PLT
4658 subl $foo@tpoff, %eax
4659 (6 byte form of subl). */
4660 roff
= rel
->r_offset
+ 5;
4665 leal foo@tlsgd(%ebx), %eax
4666 call ___tls_get_addr@PLT
4669 leal foo@tlsgd(%reg), %eax
4670 call *___tls_get_addr@GOT(%reg)
4671 which may be converted to
4672 addr32 call ___tls_get_addr
4674 movl %gs:0, %eax; subl $foo@tpoff, %eax
4675 (6 byte form of subl). */
4676 roff
= rel
->r_offset
+ 6;
4678 memcpy (contents
+ roff
- 8,
4679 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4680 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4682 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4687 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4689 /* GDesc -> LE transition.
4690 It's originally something like:
4691 leal x@tlsdesc(%ebx), %eax
4695 Registers other than %eax may be set up here. */
4700 roff
= rel
->r_offset
;
4701 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4703 /* Now modify the instruction as appropriate. */
4704 /* aoliva FIXME: remove the above and xor the byte
4706 bfd_put_8 (output_bfd
, val
^ 0x86,
4707 contents
+ roff
- 1);
4708 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4712 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4714 /* GDesc -> LE transition.
4722 roff
= rel
->r_offset
;
4723 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4724 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4727 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4731 /* IE->LE transition:
4732 Originally it can be one of:
4740 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4743 /* movl foo, %eax. */
4744 bfd_put_8 (output_bfd
, 0xb8,
4745 contents
+ rel
->r_offset
- 1);
4751 type
= bfd_get_8 (input_bfd
,
4752 contents
+ rel
->r_offset
- 2);
4757 bfd_put_8 (output_bfd
, 0xc7,
4758 contents
+ rel
->r_offset
- 2);
4759 bfd_put_8 (output_bfd
,
4760 0xc0 | ((val
>> 3) & 7),
4761 contents
+ rel
->r_offset
- 1);
4765 bfd_put_8 (output_bfd
, 0x81,
4766 contents
+ rel
->r_offset
- 2);
4767 bfd_put_8 (output_bfd
,
4768 0xc0 | ((val
>> 3) & 7),
4769 contents
+ rel
->r_offset
- 1);
4776 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4777 contents
+ rel
->r_offset
);
4782 unsigned int val
, type
;
4784 /* {IE_32,GOTIE}->LE transition:
4785 Originally it can be one of:
4786 subl foo(%reg1), %reg2
4787 movl foo(%reg1), %reg2
4788 addl foo(%reg1), %reg2
4791 movl $foo, %reg2 (6 byte form)
4792 addl $foo, %reg2. */
4793 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4794 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4798 bfd_put_8 (output_bfd
, 0xc7,
4799 contents
+ rel
->r_offset
- 2);
4800 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4801 contents
+ rel
->r_offset
- 1);
4803 else if (type
== 0x2b)
4806 bfd_put_8 (output_bfd
, 0x81,
4807 contents
+ rel
->r_offset
- 2);
4808 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4809 contents
+ rel
->r_offset
- 1);
4811 else if (type
== 0x03)
4814 bfd_put_8 (output_bfd
, 0x81,
4815 contents
+ rel
->r_offset
- 2);
4816 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4817 contents
+ rel
->r_offset
- 1);
4821 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4822 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4823 contents
+ rel
->r_offset
);
4825 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4826 contents
+ rel
->r_offset
);
4831 if (htab
->elf
.sgot
== NULL
)
4836 off
= h
->got
.offset
;
4837 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4841 if (local_got_offsets
== NULL
)
4844 off
= local_got_offsets
[r_symndx
];
4845 offplt
= local_tlsdesc_gotents
[r_symndx
];
4852 Elf_Internal_Rela outrel
;
4856 if (htab
->elf
.srelgot
== NULL
)
4859 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4861 if (GOT_TLS_GDESC_P (tls_type
))
4864 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4865 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4866 <= htab
->elf
.sgotplt
->size
);
4867 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4868 + htab
->elf
.sgotplt
->output_offset
4870 + htab
->sgotplt_jump_table_size
);
4871 sreloc
= htab
->elf
.srelplt
;
4872 loc
= sreloc
->contents
;
4873 loc
+= (htab
->next_tls_desc_index
++
4874 * sizeof (Elf32_External_Rel
));
4875 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4876 <= sreloc
->contents
+ sreloc
->size
);
4877 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4880 BFD_ASSERT (! unresolved_reloc
);
4881 bfd_put_32 (output_bfd
,
4882 relocation
- elf_i386_dtpoff_base (info
),
4883 htab
->elf
.sgotplt
->contents
+ offplt
4884 + htab
->sgotplt_jump_table_size
+ 4);
4888 bfd_put_32 (output_bfd
, 0,
4889 htab
->elf
.sgotplt
->contents
+ offplt
4890 + htab
->sgotplt_jump_table_size
+ 4);
4894 sreloc
= htab
->elf
.srelgot
;
4896 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4897 + htab
->elf
.sgot
->output_offset
+ off
);
4899 if (GOT_TLS_GD_P (tls_type
))
4900 dr_type
= R_386_TLS_DTPMOD32
;
4901 else if (GOT_TLS_GDESC_P (tls_type
))
4903 else if (tls_type
== GOT_TLS_IE_POS
)
4904 dr_type
= R_386_TLS_TPOFF
;
4906 dr_type
= R_386_TLS_TPOFF32
;
4908 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4909 bfd_put_32 (output_bfd
,
4910 relocation
- elf_i386_dtpoff_base (info
),
4911 htab
->elf
.sgot
->contents
+ off
);
4912 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4913 bfd_put_32 (output_bfd
,
4914 elf_i386_dtpoff_base (info
) - relocation
,
4915 htab
->elf
.sgot
->contents
+ off
);
4916 else if (dr_type
!= R_386_TLS_DESC
)
4917 bfd_put_32 (output_bfd
, 0,
4918 htab
->elf
.sgot
->contents
+ off
);
4919 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4921 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4923 if (GOT_TLS_GD_P (tls_type
))
4927 BFD_ASSERT (! unresolved_reloc
);
4928 bfd_put_32 (output_bfd
,
4929 relocation
- elf_i386_dtpoff_base (info
),
4930 htab
->elf
.sgot
->contents
+ off
+ 4);
4934 bfd_put_32 (output_bfd
, 0,
4935 htab
->elf
.sgot
->contents
+ off
+ 4);
4936 outrel
.r_info
= ELF32_R_INFO (indx
,
4937 R_386_TLS_DTPOFF32
);
4938 outrel
.r_offset
+= 4;
4939 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4942 else if (tls_type
== GOT_TLS_IE_BOTH
)
4944 bfd_put_32 (output_bfd
,
4946 ? relocation
- elf_i386_dtpoff_base (info
)
4948 htab
->elf
.sgot
->contents
+ off
+ 4);
4949 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4950 outrel
.r_offset
+= 4;
4951 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4958 local_got_offsets
[r_symndx
] |= 1;
4961 if (off
>= (bfd_vma
) -2
4962 && ! GOT_TLS_GDESC_P (tls_type
))
4964 if (r_type
== R_386_TLS_GOTDESC
4965 || r_type
== R_386_TLS_DESC_CALL
)
4967 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4968 unresolved_reloc
= FALSE
;
4970 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4972 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4973 + htab
->elf
.sgotplt
->output_offset
;
4974 relocation
= htab
->elf
.sgot
->output_section
->vma
4975 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4976 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4977 && tls_type
== GOT_TLS_IE_BOTH
)
4979 if (r_type
== R_386_TLS_IE
)
4980 relocation
+= g_o_t
;
4981 unresolved_reloc
= FALSE
;
4983 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4985 unsigned int val
, type
;
4988 /* GD->IE transition. */
4989 type
= *(contents
+ rel
->r_offset
- 2);
4990 val
= *(contents
+ rel
->r_offset
- 1);
4994 leal foo@tlsgd(,%ebx,1), %eax
4995 call ___tls_get_addr@PLT
4998 subl $foo@gottpoff(%ebx), %eax. */
5000 roff
= rel
->r_offset
- 3;
5005 leal foo@tlsgd(%ebx), %eax
5006 call ___tls_get_addr@PLT
5009 leal foo@tlsgd(%reg), %eax
5010 call *___tls_get_addr@GOT(%reg)
5011 which may be converted to
5012 addr32 call ___tls_get_addr
5015 subl $foo@gottpoff(%reg), %eax. */
5016 roff
= rel
->r_offset
- 2;
5018 memcpy (contents
+ roff
,
5019 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
5020 contents
[roff
+ 7] = 0x80 | (val
& 7);
5021 /* If foo is used only with foo@gotntpoff(%reg) and
5022 foo@indntpoff, but not with foo@gottpoff(%reg), change
5023 subl $foo@gottpoff(%reg), %eax
5025 addl $foo@gotntpoff(%reg), %eax. */
5026 if (tls_type
== GOT_TLS_IE_POS
)
5027 contents
[roff
+ 6] = 0x03;
5028 bfd_put_32 (output_bfd
,
5029 htab
->elf
.sgot
->output_section
->vma
5030 + htab
->elf
.sgot
->output_offset
+ off
5031 - htab
->elf
.sgotplt
->output_section
->vma
5032 - htab
->elf
.sgotplt
->output_offset
,
5033 contents
+ roff
+ 8);
5034 /* Skip R_386_PLT32 and R_386_GOT32X. */
5039 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
5041 /* GDesc -> IE transition.
5042 It's originally something like:
5043 leal x@tlsdesc(%ebx), %eax
5046 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5048 movl x@gottpoff(%ebx), %eax # before negl %eax
5050 Registers other than %eax may be set up here. */
5054 /* First, make sure it's a leal adding ebx to a 32-bit
5055 offset into any register, although it's probably
5056 almost always going to be eax. */
5057 roff
= rel
->r_offset
;
5059 /* Now modify the instruction as appropriate. */
5060 /* To turn a leal into a movl in the form we use it, it
5061 suffices to change the first byte from 0x8d to 0x8b.
5062 aoliva FIXME: should we decide to keep the leal, all
5063 we have to do is remove the statement below, and
5064 adjust the relaxation of R_386_TLS_DESC_CALL. */
5065 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
5067 if (tls_type
== GOT_TLS_IE_BOTH
)
5070 bfd_put_32 (output_bfd
,
5071 htab
->elf
.sgot
->output_section
->vma
5072 + htab
->elf
.sgot
->output_offset
+ off
5073 - htab
->elf
.sgotplt
->output_section
->vma
5074 - htab
->elf
.sgotplt
->output_offset
,
5078 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
5080 /* GDesc -> IE transition.
5088 depending on how we transformed the TLS_GOTDESC above.
5093 roff
= rel
->r_offset
;
5095 /* Now modify the instruction as appropriate. */
5096 if (tls_type
!= GOT_TLS_IE_NEG
)
5099 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5100 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5105 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
5106 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
5116 if (! elf_i386_tls_transition (info
, input_bfd
,
5117 input_section
, contents
,
5118 symtab_hdr
, sym_hashes
,
5119 &r_type
, GOT_UNKNOWN
, rel
,
5120 relend
, h
, r_symndx
, TRUE
))
5123 if (r_type
!= R_386_TLS_LDM
)
5125 /* LD->LE transition. Change
5126 leal foo@tlsldm(%ebx) %eax
5127 call ___tls_get_addr@PLT
5131 leal 0(%esi,1), %esi
5133 leal foo@tlsldm(%reg) %eax
5134 call *___tls_get_addr@GOT(%reg)
5135 which may be converted to
5136 addr32 call ___tls_get_addr
5139 leal 0(%esi), %esi */
5140 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
5141 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
5142 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
5143 memcpy (contents
+ rel
->r_offset
- 2,
5144 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5146 memcpy (contents
+ rel
->r_offset
- 2,
5147 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5148 /* Skip R_386_PC32/R_386_PLT32. */
5154 if (htab
->elf
.sgot
== NULL
)
5157 off
= htab
->tls_ldm_got
.offset
;
5162 Elf_Internal_Rela outrel
;
5164 if (htab
->elf
.srelgot
== NULL
)
5167 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5168 + htab
->elf
.sgot
->output_offset
+ off
);
5170 bfd_put_32 (output_bfd
, 0,
5171 htab
->elf
.sgot
->contents
+ off
);
5172 bfd_put_32 (output_bfd
, 0,
5173 htab
->elf
.sgot
->contents
+ off
+ 4);
5174 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5175 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5176 htab
->tls_ldm_got
.offset
|= 1;
5178 relocation
= htab
->elf
.sgot
->output_section
->vma
5179 + htab
->elf
.sgot
->output_offset
+ off
5180 - htab
->elf
.sgotplt
->output_section
->vma
5181 - htab
->elf
.sgotplt
->output_offset
;
5182 unresolved_reloc
= FALSE
;
5185 case R_386_TLS_LDO_32
:
5186 if (!bfd_link_executable (info
)
5187 || (input_section
->flags
& SEC_CODE
) == 0)
5188 relocation
-= elf_i386_dtpoff_base (info
);
5190 /* When converting LDO to LE, we must negate. */
5191 relocation
= -elf_i386_tpoff (info
, relocation
);
5194 case R_386_TLS_LE_32
:
5196 if (!bfd_link_executable (info
))
5198 Elf_Internal_Rela outrel
;
5201 outrel
.r_offset
= rel
->r_offset
5202 + input_section
->output_section
->vma
5203 + input_section
->output_offset
;
5204 if (h
!= NULL
&& h
->dynindx
!= -1)
5208 if (r_type
== R_386_TLS_LE_32
)
5209 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5211 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5212 sreloc
= elf_section_data (input_section
)->sreloc
;
5215 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5218 else if (r_type
== R_386_TLS_LE_32
)
5219 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5221 relocation
-= elf_i386_dtpoff_base (info
);
5223 else if (r_type
== R_386_TLS_LE_32
)
5224 relocation
= elf_i386_tpoff (info
, relocation
);
5226 relocation
= -elf_i386_tpoff (info
, relocation
);
5233 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5234 because such sections are not SEC_ALLOC and thus ld.so will
5235 not process them. */
5236 if (unresolved_reloc
5237 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5239 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5240 rel
->r_offset
) != (bfd_vma
) -1)
5243 /* xgettext:c-format */
5244 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5247 (long) rel
->r_offset
,
5249 h
->root
.root
.string
);
5254 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5255 contents
, rel
->r_offset
,
5258 check_relocation_error
:
5259 if (r
!= bfd_reloc_ok
)
5264 name
= h
->root
.root
.string
;
5267 name
= bfd_elf_string_from_elf_section (input_bfd
,
5268 symtab_hdr
->sh_link
,
5273 name
= bfd_section_name (input_bfd
, sec
);
5276 if (r
== bfd_reloc_overflow
)
5277 (*info
->callbacks
->reloc_overflow
)
5278 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5279 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5283 /* xgettext:c-format */
5284 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5285 input_bfd
, input_section
,
5286 (long) rel
->r_offset
, name
, (int) r
);
5297 Elf_Internal_Shdr
*rel_hdr
;
5298 size_t deleted
= rel
- wrel
;
5300 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5301 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5302 if (rel_hdr
->sh_size
== 0)
5304 /* It is too late to remove an empty reloc section. Leave
5306 ??? What is wrong with an empty section??? */
5307 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5310 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5311 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5312 input_section
->reloc_count
-= deleted
;
5318 /* Finish up dynamic symbol handling. We set the contents of various
5319 dynamic sections here. */
5322 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5323 struct bfd_link_info
*info
,
5324 struct elf_link_hash_entry
*h
,
5325 Elf_Internal_Sym
*sym
)
5327 struct elf_i386_link_hash_table
*htab
;
5328 unsigned plt_entry_size
;
5329 const struct elf_i386_backend_data
*abed
;
5330 struct elf_i386_link_hash_entry
*eh
;
5331 bfd_boolean local_undefweak
;
5333 htab
= elf_i386_hash_table (info
);
5337 abed
= get_elf_i386_backend_data (output_bfd
);
5338 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
5340 eh
= (struct elf_i386_link_hash_entry
*) h
;
5341 if (eh
->no_finish_dynamic_symbol
)
5344 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5345 resolved undefined weak symbols in executable so that their
5346 references have value 0 at run-time. */
5347 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5351 if (h
->plt
.offset
!= (bfd_vma
) -1)
5355 Elf_Internal_Rela rel
;
5357 asection
*plt
, *gotplt
, *relplt
;
5359 /* When building a static executable, use .iplt, .igot.plt and
5360 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5361 if (htab
->elf
.splt
!= NULL
)
5363 plt
= htab
->elf
.splt
;
5364 gotplt
= htab
->elf
.sgotplt
;
5365 relplt
= htab
->elf
.srelplt
;
5369 plt
= htab
->elf
.iplt
;
5370 gotplt
= htab
->elf
.igotplt
;
5371 relplt
= htab
->elf
.irelplt
;
5374 /* This symbol has an entry in the procedure linkage table. Set
5377 if ((h
->dynindx
== -1
5379 && !((h
->forced_local
|| bfd_link_executable (info
))
5381 && h
->type
== STT_GNU_IFUNC
))
5387 /* Get the index in the procedure linkage table which
5388 corresponds to this symbol. This is the index of this symbol
5389 in all the symbols for which we are making plt entries. The
5390 first entry in the procedure linkage table is reserved.
5392 Get the offset into the .got table of the entry that
5393 corresponds to this function. Each .got entry is 4 bytes.
5394 The first three are reserved.
5396 For static executables, we don't reserve anything. */
5398 if (plt
== htab
->elf
.splt
)
5400 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
5401 got_offset
= (got_offset
+ 3) * 4;
5405 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5406 got_offset
= got_offset
* 4;
5409 /* Fill in the entry in the procedure linkage table. */
5410 if (! bfd_link_pic (info
))
5412 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
5413 abed
->plt
->plt_entry_size
);
5414 bfd_put_32 (output_bfd
,
5415 (gotplt
->output_section
->vma
5416 + gotplt
->output_offset
5418 plt
->contents
+ h
->plt
.offset
5419 + abed
->plt
->plt_got_offset
);
5421 if (abed
->is_vxworks
)
5423 int s
, k
, reloc_index
;
5425 /* Create the R_386_32 relocation referencing the GOT
5426 for this PLT entry. */
5428 /* S: Current slot number (zero-based). */
5429 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
5430 / abed
->plt
->plt_entry_size
);
5431 /* K: Number of relocations for PLTResolve. */
5432 if (bfd_link_pic (info
))
5433 k
= PLTRESOLVE_RELOCS_SHLIB
;
5435 k
= PLTRESOLVE_RELOCS
;
5436 /* Skip the PLTresolve relocations, and the relocations for
5437 the other PLT slots. */
5438 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5439 loc
= (htab
->srelplt2
->contents
+ reloc_index
5440 * sizeof (Elf32_External_Rel
));
5442 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5443 + htab
->elf
.splt
->output_offset
5444 + h
->plt
.offset
+ 2),
5445 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5446 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5448 /* Create the R_386_32 relocation referencing the beginning of
5449 the PLT for this GOT entry. */
5450 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5451 + htab
->elf
.sgotplt
->output_offset
5453 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5454 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5455 loc
+ sizeof (Elf32_External_Rel
));
5460 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
5461 abed
->plt
->plt_entry_size
);
5462 bfd_put_32 (output_bfd
, got_offset
,
5463 plt
->contents
+ h
->plt
.offset
5464 + abed
->plt
->plt_got_offset
);
5467 /* Fill in the entry in the global offset table. Leave the entry
5468 as zero for undefined weak symbol in PIE. No PLT relocation
5469 against undefined weak symbol in PIE. */
5470 if (!local_undefweak
)
5472 bfd_put_32 (output_bfd
,
5473 (plt
->output_section
->vma
5474 + plt
->output_offset
5476 + abed
->plt
->plt_lazy_offset
),
5477 gotplt
->contents
+ got_offset
);
5479 /* Fill in the entry in the .rel.plt section. */
5480 rel
.r_offset
= (gotplt
->output_section
->vma
5481 + gotplt
->output_offset
5483 if (h
->dynindx
== -1
5484 || ((bfd_link_executable (info
)
5485 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5487 && h
->type
== STT_GNU_IFUNC
))
5489 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5490 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5491 in the .got.plt section. */
5492 bfd_put_32 (output_bfd
,
5493 (h
->root
.u
.def
.value
5494 + h
->root
.u
.def
.section
->output_section
->vma
5495 + h
->root
.u
.def
.section
->output_offset
),
5496 gotplt
->contents
+ got_offset
);
5497 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5498 /* R_386_IRELATIVE comes last. */
5499 plt_index
= htab
->next_irelative_index
--;
5503 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5504 plt_index
= htab
->next_jump_slot_index
++;
5507 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5508 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5510 /* Don't fill PLT entry for static executables. */
5511 if (plt
== htab
->elf
.splt
)
5513 bfd_put_32 (output_bfd
,
5514 plt_index
* sizeof (Elf32_External_Rel
),
5515 plt
->contents
+ h
->plt
.offset
5516 + abed
->plt
->plt_reloc_offset
);
5517 bfd_put_32 (output_bfd
, - (h
->plt
.offset
5518 + abed
->plt
->plt_plt_offset
+ 4),
5519 plt
->contents
+ h
->plt
.offset
5520 + abed
->plt
->plt_plt_offset
);
5524 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5526 bfd_vma got_offset
, plt_offset
;
5527 asection
*plt
, *got
, *gotplt
;
5528 const bfd_byte
*got_plt_entry
;
5530 /* Offset of displacement of the indirect jump. */
5531 bfd_vma plt_got_offset
= 2;
5533 /* Set the entry in the GOT procedure linkage table. */
5534 plt
= htab
->plt_got
;
5535 got
= htab
->elf
.sgot
;
5536 gotplt
= htab
->elf
.sgotplt
;
5537 got_offset
= h
->got
.offset
;
5539 if (got_offset
== (bfd_vma
) -1
5545 /* Fill in the entry in the GOT procedure linkage table. */
5546 if (! bfd_link_pic (info
))
5548 got_plt_entry
= elf_i386_got_plt_entry
;
5549 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5553 got_plt_entry
= elf_i386_pic_got_plt_entry
;
5554 got_offset
+= (got
->output_section
->vma
5555 + got
->output_offset
5556 - gotplt
->output_section
->vma
5557 - gotplt
->output_offset
);
5560 plt_offset
= eh
->plt_got
.offset
;
5561 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5562 sizeof (elf_i386_got_plt_entry
));
5563 bfd_put_32 (output_bfd
, got_offset
,
5564 plt
->contents
+ plt_offset
+ plt_got_offset
);
5567 if (!local_undefweak
5569 && (h
->plt
.offset
!= (bfd_vma
) -1
5570 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5572 /* Mark the symbol as undefined, rather than as defined in
5573 the .plt section. Leave the value if there were any
5574 relocations where pointer equality matters (this is a clue
5575 for the dynamic linker, to make function pointer
5576 comparisons work between an application and shared
5577 library), otherwise set it to zero. If a function is only
5578 called from a binary, there is no need to slow down
5579 shared libraries because of that. */
5580 sym
->st_shndx
= SHN_UNDEF
;
5581 if (!h
->pointer_equality_needed
)
5585 /* Don't generate dynamic GOT relocation against undefined weak
5586 symbol in executable. */
5587 if (h
->got
.offset
!= (bfd_vma
) -1
5588 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5589 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5590 && !local_undefweak
)
5592 Elf_Internal_Rela rel
;
5593 asection
*relgot
= htab
->elf
.srelgot
;
5595 /* This symbol has an entry in the global offset table. Set it
5598 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5601 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5602 + htab
->elf
.sgot
->output_offset
5603 + (h
->got
.offset
& ~(bfd_vma
) 1));
5605 /* If this is a static link, or it is a -Bsymbolic link and the
5606 symbol is defined locally or was forced to be local because
5607 of a version file, we just want to emit a RELATIVE reloc.
5608 The entry in the global offset table will already have been
5609 initialized in the relocate_section function. */
5611 && h
->type
== STT_GNU_IFUNC
)
5613 if (h
->plt
.offset
== (bfd_vma
) -1)
5615 /* STT_GNU_IFUNC is referenced without PLT. */
5616 if (htab
->elf
.splt
== NULL
)
5618 /* use .rel[a].iplt section to store .got relocations
5619 in static executable. */
5620 relgot
= htab
->elf
.irelplt
;
5622 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5624 bfd_put_32 (output_bfd
,
5625 (h
->root
.u
.def
.value
5626 + h
->root
.u
.def
.section
->output_section
->vma
5627 + h
->root
.u
.def
.section
->output_offset
),
5628 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5629 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5634 else if (bfd_link_pic (info
))
5636 /* Generate R_386_GLOB_DAT. */
5643 if (!h
->pointer_equality_needed
)
5646 /* For non-shared object, we can't use .got.plt, which
5647 contains the real function addres if we need pointer
5648 equality. We load the GOT entry with the PLT entry. */
5649 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5650 bfd_put_32 (output_bfd
,
5651 (plt
->output_section
->vma
5652 + plt
->output_offset
+ h
->plt
.offset
),
5653 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5657 else if (bfd_link_pic (info
)
5658 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5660 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5661 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5665 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5667 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5668 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5669 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5672 elf_append_rel (output_bfd
, relgot
, &rel
);
5677 Elf_Internal_Rela rel
;
5680 /* This symbol needs a copy reloc. Set it up. */
5682 if (h
->dynindx
== -1
5683 || (h
->root
.type
!= bfd_link_hash_defined
5684 && h
->root
.type
!= bfd_link_hash_defweak
)
5685 || htab
->elf
.srelbss
== NULL
5686 || htab
->elf
.sreldynrelro
== NULL
)
5689 rel
.r_offset
= (h
->root
.u
.def
.value
5690 + h
->root
.u
.def
.section
->output_section
->vma
5691 + h
->root
.u
.def
.section
->output_offset
);
5692 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5693 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5694 s
= htab
->elf
.sreldynrelro
;
5696 s
= htab
->elf
.srelbss
;
5697 elf_append_rel (output_bfd
, s
, &rel
);
5703 /* Finish up local dynamic symbol handling. We set the contents of
5704 various dynamic sections here. */
5707 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5709 struct elf_link_hash_entry
*h
5710 = (struct elf_link_hash_entry
*) *slot
;
5711 struct bfd_link_info
*info
5712 = (struct bfd_link_info
*) inf
;
5714 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5718 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5719 here since undefined weak symbol may not be dynamic and may not be
5720 called for elf_i386_finish_dynamic_symbol. */
5723 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5726 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5727 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5729 if (h
->root
.type
!= bfd_link_hash_undefweak
5730 || h
->dynindx
!= -1)
5733 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5737 /* Used to decide how to sort relocs in an optimal manner for the
5738 dynamic linker, before writing them out. */
5740 static enum elf_reloc_type_class
5741 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5742 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5743 const Elf_Internal_Rela
*rela
)
5745 bfd
*abfd
= info
->output_bfd
;
5746 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5747 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5749 if (htab
->dynsym
!= NULL
5750 && htab
->dynsym
->contents
!= NULL
)
5752 /* Check relocation against STT_GNU_IFUNC symbol if there are
5754 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5755 if (r_symndx
!= STN_UNDEF
)
5757 Elf_Internal_Sym sym
;
5758 if (!bed
->s
->swap_symbol_in (abfd
,
5759 (htab
->dynsym
->contents
5760 + r_symndx
* sizeof (Elf32_External_Sym
)),
5764 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5765 return reloc_class_ifunc
;
5769 switch (ELF32_R_TYPE (rela
->r_info
))
5771 case R_386_IRELATIVE
:
5772 return reloc_class_ifunc
;
5773 case R_386_RELATIVE
:
5774 return reloc_class_relative
;
5775 case R_386_JUMP_SLOT
:
5776 return reloc_class_plt
;
5778 return reloc_class_copy
;
5780 return reloc_class_normal
;
5784 /* Finish up the dynamic sections. */
5787 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5788 struct bfd_link_info
*info
)
5790 struct elf_i386_link_hash_table
*htab
;
5793 const struct elf_i386_backend_data
*abed
;
5795 htab
= elf_i386_hash_table (info
);
5799 dynobj
= htab
->elf
.dynobj
;
5800 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5801 abed
= get_elf_i386_backend_data (output_bfd
);
5803 if (htab
->elf
.dynamic_sections_created
)
5805 Elf32_External_Dyn
*dyncon
, *dynconend
;
5807 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5810 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5811 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5812 for (; dyncon
< dynconend
; dyncon
++)
5814 Elf_Internal_Dyn dyn
;
5817 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5822 if (abed
->is_vxworks
5823 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5828 s
= htab
->elf
.sgotplt
;
5829 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5833 s
= htab
->elf
.srelplt
;
5834 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5838 s
= htab
->elf
.srelplt
;
5839 dyn
.d_un
.d_val
= s
->size
;
5843 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5846 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5848 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5849 really seem like the right value. */
5850 elf_section_data (htab
->elf
.splt
->output_section
)
5851 ->this_hdr
.sh_entsize
= 4;
5853 /* Fill in the special first entry in the procedure linkage
5855 if (bfd_link_pic (info
))
5857 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5858 abed
->plt
->plt0_entry_size
);
5859 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5860 abed
->plt0_pad_byte
,
5861 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5865 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5866 abed
->plt
->plt0_entry_size
);
5867 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5868 abed
->plt0_pad_byte
,
5869 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5870 bfd_put_32 (output_bfd
,
5871 (htab
->elf
.sgotplt
->output_section
->vma
5872 + htab
->elf
.sgotplt
->output_offset
5874 htab
->elf
.splt
->contents
5875 + abed
->plt
->plt0_got1_offset
);
5876 bfd_put_32 (output_bfd
,
5877 (htab
->elf
.sgotplt
->output_section
->vma
5878 + htab
->elf
.sgotplt
->output_offset
5880 htab
->elf
.splt
->contents
5881 + abed
->plt
->plt0_got2_offset
);
5883 if (abed
->is_vxworks
)
5885 Elf_Internal_Rela rel
;
5886 int num_plts
= (htab
->elf
.splt
->size
5887 / abed
->plt
->plt_entry_size
) - 1;
5890 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5891 On IA32 we use REL relocations so the addend goes in
5892 the PLT directly. */
5893 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5894 + htab
->elf
.splt
->output_offset
5895 + abed
->plt
->plt0_got1_offset
);
5896 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5897 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5898 htab
->srelplt2
->contents
);
5899 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5900 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5901 + htab
->elf
.splt
->output_offset
5902 + abed
->plt
->plt0_got2_offset
);
5903 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5904 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5905 htab
->srelplt2
->contents
+
5906 sizeof (Elf32_External_Rel
));
5908 /* Correct the .rel.plt.unloaded relocations. */
5909 p
= htab
->srelplt2
->contents
;
5910 if (bfd_link_pic (info
))
5911 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5913 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5915 for (; num_plts
; num_plts
--)
5917 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5918 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
5920 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5921 p
+= sizeof (Elf32_External_Rel
);
5923 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5924 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
5926 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5927 p
+= sizeof (Elf32_External_Rel
);
5934 if (htab
->elf
.sgotplt
)
5936 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5939 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5943 /* Fill in the first three entries in the global offset table. */
5944 if (htab
->elf
.sgotplt
->size
> 0)
5946 bfd_put_32 (output_bfd
,
5948 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5949 htab
->elf
.sgotplt
->contents
);
5950 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5951 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5954 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5957 /* Adjust .eh_frame for .plt section. */
5958 if (htab
->plt_eh_frame
!= NULL
5959 && htab
->plt_eh_frame
->contents
!= NULL
)
5961 if (htab
->elf
.splt
!= NULL
5962 && htab
->elf
.splt
->size
!= 0
5963 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5964 && htab
->elf
.splt
->output_section
!= NULL
5965 && htab
->plt_eh_frame
->output_section
!= NULL
)
5967 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5968 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5969 + htab
->plt_eh_frame
->output_offset
5970 + PLT_FDE_START_OFFSET
;
5971 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5972 htab
->plt_eh_frame
->contents
5973 + PLT_FDE_START_OFFSET
);
5975 if (htab
->plt_eh_frame
->sec_info_type
5976 == SEC_INFO_TYPE_EH_FRAME
)
5978 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5980 htab
->plt_eh_frame
->contents
))
5985 /* Adjust .eh_frame for .plt.got section. */
5986 if (htab
->plt_got_eh_frame
!= NULL
5987 && htab
->plt_got_eh_frame
->contents
!= NULL
)
5989 if (htab
->plt_got
!= NULL
5990 && htab
->plt_got
->size
!= 0
5991 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
5992 && htab
->plt_got
->output_section
!= NULL
5993 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
5995 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
5996 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
5997 + htab
->plt_got_eh_frame
->output_offset
5998 + PLT_FDE_START_OFFSET
;
5999 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6000 htab
->plt_got_eh_frame
->contents
6001 + PLT_FDE_START_OFFSET
);
6003 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
6005 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6006 htab
->plt_got_eh_frame
,
6007 htab
->plt_got_eh_frame
->contents
))
6012 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
6013 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
6015 /* Fill PLT entries for undefined weak symbols in PIE. */
6016 if (bfd_link_pie (info
))
6017 bfd_hash_traverse (&info
->hash
->table
,
6018 elf_i386_pie_finish_undefweak_symbol
,
6024 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6025 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6026 It has to be done before elf_link_sort_relocs is called so that
6027 dynamic relocations are properly sorted. */
6030 elf_i386_output_arch_local_syms
6031 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
6032 struct bfd_link_info
*info
,
6033 void *flaginfo ATTRIBUTE_UNUSED
,
6034 int (*func
) (void *, const char *,
6037 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
6039 struct elf_i386_link_hash_table
*htab
= elf_i386_hash_table (info
);
6043 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6044 htab_traverse (htab
->loc_hash_table
,
6045 elf_i386_finish_local_dynamic_symbol
,
6051 /* Return an array of PLT entry symbol values. */
6054 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
6057 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
6060 bfd_vma
*plt_sym_val
;
6062 bfd_byte
*plt_contents
;
6063 const struct elf_i386_backend_data
*bed
6064 = get_elf_i386_backend_data (abfd
);
6065 Elf_Internal_Shdr
*hdr
;
6067 /* Get the .plt section contents. */
6068 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6069 if (plt_contents
== NULL
)
6071 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6072 plt_contents
, 0, plt
->size
))
6075 free (plt_contents
);
6079 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
6080 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
6083 hdr
= &elf_section_data (relplt
)->this_hdr
;
6084 count
= relplt
->size
/ hdr
->sh_entsize
;
6086 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
6087 if (plt_sym_val
== NULL
)
6090 for (i
= 0; i
< count
; i
++)
6091 plt_sym_val
[i
] = -1;
6093 plt_offset
= bed
->plt
->plt_entry_size
;
6094 p
= relplt
->relocation
;
6095 for (i
= 0; i
< count
; i
++, p
++)
6099 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6100 if (p
->howto
== NULL
)
6103 if (p
->howto
->type
!= R_386_JUMP_SLOT
6104 && p
->howto
->type
!= R_386_IRELATIVE
)
6107 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
6108 + bed
->plt
->plt_reloc_offset
));
6109 reloc_index
/= sizeof (Elf32_External_Rel
);
6110 if (reloc_index
< count
)
6111 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
6113 plt_offset
+= bed
->plt
->plt_entry_size
;
6115 /* PR binutils/18437: Skip extra relocations in the .rel.plt
6117 if (plt_offset
>= plt
->size
)
6121 free (plt_contents
);
6126 /* Similar to _bfd_elf_get_synthetic_symtab. */
6129 elf_i386_get_synthetic_symtab (bfd
*abfd
,
6136 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
6137 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
6138 dynsymcount
, dynsyms
, ret
,
6140 elf_i386_get_plt_sym_val
);
6143 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6146 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
6148 if (h
->plt
.offset
!= (bfd_vma
) -1
6150 && !h
->pointer_equality_needed
)
6153 return _bfd_elf_hash_symbol (h
);
6156 /* Parse i386 GNU properties. */
6158 static enum elf_property_kind
6159 elf_i386_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
6160 bfd_byte
*ptr
, unsigned int datasz
)
6166 case GNU_PROPERTY_X86_ISA_1_USED
:
6167 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6171 ((type
== GNU_PROPERTY_X86_ISA_1_USED
6172 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6173 : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
6175 return property_corrupt
;
6177 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
6178 prop
->u
.number
= bfd_h_get_32 (abfd
, ptr
);
6179 prop
->pr_kind
= property_number
;
6183 return property_ignored
;
6186 return property_number
;
6189 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6190 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6191 should be merged with ABFD. */
6194 elf_i386_merge_gnu_properties (bfd
*abfd ATTRIBUTE_UNUSED
,
6195 elf_property
*aprop
,
6196 elf_property
*bprop
)
6198 unsigned int number
;
6199 bfd_boolean updated
= FALSE
;
6200 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
6204 case GNU_PROPERTY_X86_ISA_1_USED
:
6205 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6206 if (aprop
!= NULL
&& bprop
!= NULL
)
6208 number
= aprop
->u
.number
;
6209 aprop
->u
.number
= number
| bprop
->u
.number
;
6210 updated
= number
!= (unsigned int) aprop
->u
.number
;
6214 /* Return TRUE if APROP is NULL to indicate that BPROP should
6215 be added to ABFD. */
6216 updated
= aprop
== NULL
;
6221 /* Never should happen. */
6228 #define TARGET_LITTLE_SYM i386_elf32_vec
6229 #define TARGET_LITTLE_NAME "elf32-i386"
6230 #define ELF_ARCH bfd_arch_i386
6231 #define ELF_TARGET_ID I386_ELF_DATA
6232 #define ELF_MACHINE_CODE EM_386
6233 #define ELF_MAXPAGESIZE 0x1000
6235 #define elf_backend_can_gc_sections 1
6236 #define elf_backend_can_refcount 1
6237 #define elf_backend_want_got_plt 1
6238 #define elf_backend_plt_readonly 1
6239 #define elf_backend_want_plt_sym 0
6240 #define elf_backend_got_header_size 12
6241 #define elf_backend_plt_alignment 4
6242 #define elf_backend_dtrel_excludes_plt 1
6243 #define elf_backend_extern_protected_data 1
6244 #define elf_backend_caches_rawsize 1
6245 #define elf_backend_want_dynrelro 1
6247 /* Support RELA for objdump of prelink objects. */
6248 #define elf_info_to_howto elf_i386_info_to_howto_rel
6249 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6251 #define bfd_elf32_mkobject elf_i386_mkobject
6253 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6254 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6255 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6256 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6257 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6259 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6260 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6261 #define elf_backend_check_relocs elf_i386_check_relocs
6262 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6263 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
6264 #define elf_backend_fake_sections elf_i386_fake_sections
6265 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6266 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6267 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6268 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6269 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6270 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6271 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6272 #define elf_backend_relocate_section elf_i386_relocate_section
6273 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6274 #define elf_backend_always_size_sections elf_i386_always_size_sections
6275 #define elf_backend_omit_section_dynsym \
6276 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6277 #define elf_backend_hash_symbol elf_i386_hash_symbol
6278 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6279 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
6280 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
6282 #include "elf32-target.h"
6284 /* FreeBSD support. */
6286 #undef TARGET_LITTLE_SYM
6287 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6288 #undef TARGET_LITTLE_NAME
6289 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6291 #define ELF_OSABI ELFOSABI_FREEBSD
6293 /* The kernel recognizes executables as valid only if they carry a
6294 "FreeBSD" label in the ELF header. So we put this label on all
6295 executables and (for simplicity) also all other object files. */
6298 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6300 _bfd_elf_post_process_headers (abfd
, info
);
6302 #ifdef OLD_FREEBSD_ABI_LABEL
6304 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6305 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
6306 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
6311 #undef elf_backend_post_process_headers
6312 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6314 #define elf32_bed elf32_i386_fbsd_bed
6316 #undef elf_backend_add_symbol_hook
6318 #include "elf32-target.h"
6322 #undef TARGET_LITTLE_SYM
6323 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6324 #undef TARGET_LITTLE_NAME
6325 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6327 #undef elf_backend_post_process_headers
6329 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6330 objects won't be recognized. */
6334 #define elf32_bed elf32_i386_sol2_bed
6336 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6338 #undef elf_backend_static_tls_alignment
6339 #define elf_backend_static_tls_alignment 8
6341 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6343 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6345 #undef elf_backend_want_plt_sym
6346 #define elf_backend_want_plt_sym 1
6348 #undef elf_backend_strtab_flags
6349 #define elf_backend_strtab_flags SHF_STRINGS
6351 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6352 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6353 FALSE otherwise. ISECTION is the best guess matching section from the
6354 input bfd IBFD, but it might be NULL. */
6357 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6358 bfd
*obfd ATTRIBUTE_UNUSED
,
6359 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6360 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6362 /* PR 19938: FIXME: Need to add code for setting the sh_info
6363 and sh_link fields of Solaris specific section types. */
6366 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6367 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6369 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6371 The following values should be set:
6374 -----------------------------------------------------------------------------
6375 SHT_SUNW_ancillary The section header index of 0
6376 [0x6fffffee] the associated string table.
6378 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6379 [0x6ffffff0] the associated symbol table. section header index of
6381 SHT_SUNW_capchain table,
6384 SHT_SUNW_symsort The section header index of 0
6385 [0x6ffffff1] the associated symbol table.
6387 SHT_SUNW_tlssort The section header index of 0
6388 [0x6ffffff2] the associated symbol table.
6390 SHT_SUNW_LDYNSYM The section header index of One greater than the
6391 [0x6ffffff3] the associated string table. symbol table index of the
6392 This index is the same string last local symbol,
6393 table used by the SHT_DYNSYM STB_LOCAL. Since
6394 section. SHT_SUNW_LDYNSYM only
6395 contains local symbols,
6396 sh_info is equivalent to
6397 the number of symbols in
6400 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6401 [0x6ffffff5] the section header index of to named strings, the
6402 the associated section header index of
6403 SHT_SUNW_capinfo table, the associated string
6404 otherwise 0. table, otherwise 0.
6406 SHT_SUNW_move The section header index of 0
6407 [0x6ffffffa] the associated symbol table.
6412 SHT_SUNW_syminfo The section header index of The section header index
6413 [0x6ffffffc] the associated symbol table. of the associated
6416 SHT_SUNW_verdef The section header index of The number of version
6417 [0x6ffffffd] the associated string table. definitions within the
6420 SHT_SUNW_verneed The section header index of The number of version
6421 [0x6ffffffe] the associated string table. dependencies within the
6424 SHT_SUNW_versym The section header index of 0
6425 [0x6fffffff] the associated symbol table. */
6428 #undef elf_backend_copy_special_section_fields
6429 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6431 #include "elf32-target.h"
6433 /* Intel MCU support. */
6436 elf32_iamcu_elf_object_p (bfd
*abfd
)
6438 /* Set the right machine number for an IAMCU elf32 file. */
6439 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
6443 #undef TARGET_LITTLE_SYM
6444 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6445 #undef TARGET_LITTLE_NAME
6446 #define TARGET_LITTLE_NAME "elf32-iamcu"
6448 #define ELF_ARCH bfd_arch_iamcu
6450 #undef ELF_MACHINE_CODE
6451 #define ELF_MACHINE_CODE EM_IAMCU
6456 #define elf32_bed elf32_iamcu_bed
6458 #undef elf_backend_object_p
6459 #define elf_backend_object_p elf32_iamcu_elf_object_p
6461 #undef elf_backend_static_tls_alignment
6463 #undef elf_backend_want_plt_sym
6464 #define elf_backend_want_plt_sym 0
6466 #undef elf_backend_strtab_flags
6467 #undef elf_backend_copy_special_section_fields
6469 #include "elf32-target.h"
6471 /* Restore defaults. */
6473 #define ELF_ARCH bfd_arch_i386
6474 #undef ELF_MACHINE_CODE
6475 #define ELF_MACHINE_CODE EM_386
6477 /* Native Client support. */
6479 #undef TARGET_LITTLE_SYM
6480 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6481 #undef TARGET_LITTLE_NAME
6482 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6484 #define elf32_bed elf32_i386_nacl_bed
6486 #undef ELF_MAXPAGESIZE
6487 #define ELF_MAXPAGESIZE 0x10000
6489 /* Restore defaults. */
6491 #undef elf_backend_want_plt_sym
6492 #define elf_backend_want_plt_sym 0
6493 #undef elf_backend_post_process_headers
6494 #undef elf_backend_static_tls_alignment
6496 /* NaCl uses substantially different PLT entries for the same effects. */
6498 #undef elf_backend_plt_alignment
6499 #define elf_backend_plt_alignment 5
6500 #define NACL_PLT_ENTRY_SIZE 64
6501 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6503 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
6505 0xff, 0x35, /* pushl contents of address */
6506 0, 0, 0, 0, /* replaced with address of .got + 4. */
6507 0x8b, 0x0d, /* movl contents of address, %ecx */
6508 0, 0, 0, 0, /* replaced with address of .got + 8. */
6509 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6510 0xff, 0xe1 /* jmp *%ecx */
6513 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6515 0x8b, 0x0d, /* movl contents of address, %ecx */
6516 0, 0, 0, 0, /* replaced with GOT slot address. */
6517 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6518 0xff, 0xe1, /* jmp *%ecx */
6520 /* Pad to the next 32-byte boundary with nop instructions. */
6522 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6523 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6525 /* Lazy GOT entries point here (32-byte aligned). */
6526 0x68, /* pushl immediate */
6527 0, 0, 0, 0, /* replaced with reloc offset. */
6528 0xe9, /* jmp relative */
6529 0, 0, 0, 0, /* replaced with offset to .plt. */
6531 /* Pad to the next 32-byte boundary with nop instructions. */
6532 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6533 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6537 static const bfd_byte
6538 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
6540 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6541 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6542 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6543 0xff, 0xe1, /* jmp *%ecx */
6545 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6546 so pad to that size with nop instructions. */
6547 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6550 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6552 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6553 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6554 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6555 0xff, 0xe1, /* jmp *%ecx */
6557 /* Pad to the next 32-byte boundary with nop instructions. */
6559 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6560 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6562 /* Lazy GOT entries point here (32-byte aligned). */
6563 0x68, /* pushl immediate */
6564 0, 0, 0, 0, /* replaced with offset into relocation table. */
6565 0xe9, /* jmp relative */
6566 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6568 /* Pad to the next 32-byte boundary with nop instructions. */
6569 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6570 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6574 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
6576 #if (PLT_CIE_LENGTH != 20 \
6577 || PLT_FDE_LENGTH != 36 \
6578 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6579 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6580 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6582 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6583 0, 0, 0, 0, /* CIE ID */
6584 1, /* CIE version */
6585 'z', 'R', 0, /* Augmentation string */
6586 1, /* Code alignment factor */
6587 0x7c, /* Data alignment factor: -4 */
6588 8, /* Return address column */
6589 1, /* Augmentation size */
6590 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6591 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6592 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6593 DW_CFA_nop
, DW_CFA_nop
,
6595 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6596 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
6597 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6598 0, 0, 0, 0, /* .plt size goes here */
6599 0, /* Augmentation size */
6600 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
6601 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6602 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
6603 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6604 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6605 13, /* Block length */
6606 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
6607 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
6608 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6609 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
6610 DW_CFA_nop
, DW_CFA_nop
6613 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
6615 elf_i386_nacl_plt0_entry
, /* plt0_entry */
6616 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
6617 2, /* plt0_got1_offset */
6618 8, /* plt0_got2_offset */
6619 elf_i386_nacl_plt_entry
, /* plt_entry */
6620 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6621 2, /* plt_got_offset */
6622 33, /* plt_reloc_offset */
6623 38, /* plt_plt_offset */
6624 32, /* plt_lazy_offset */
6625 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
6626 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
6627 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
6628 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
6629 NULL
, /* eh_frame_plt_got */
6630 0, /* eh_frame_plt_got_size */
6633 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
6635 &elf_i386_nacl_plt
, /* plt */
6636 0x90, /* plt0_pad_byte: nop insn */
6641 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
6643 /* Set the right machine number for a NaCl i386 ELF32 file. */
6644 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
6648 #undef elf_backend_arch_data
6649 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6651 #undef elf_backend_object_p
6652 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6653 #undef elf_backend_modify_segment_map
6654 #define elf_backend_modify_segment_map nacl_modify_segment_map
6655 #undef elf_backend_modify_program_headers
6656 #define elf_backend_modify_program_headers nacl_modify_program_headers
6657 #undef elf_backend_final_write_processing
6658 #define elf_backend_final_write_processing nacl_final_write_processing
6660 #include "elf32-target.h"
6662 /* Restore defaults. */
6663 #undef elf_backend_object_p
6664 #undef elf_backend_modify_segment_map
6665 #undef elf_backend_modify_program_headers
6666 #undef elf_backend_final_write_processing
6668 /* VxWorks support. */
6670 #undef TARGET_LITTLE_SYM
6671 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6672 #undef TARGET_LITTLE_NAME
6673 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6675 #undef ELF_MAXPAGESIZE
6676 #define ELF_MAXPAGESIZE 0x1000
6677 #undef elf_backend_plt_alignment
6678 #define elf_backend_plt_alignment 4
6680 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
6682 &elf_i386_plt
, /* plt */
6683 0x90, /* plt0_pad_byte */
6687 #undef elf_backend_arch_data
6688 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6690 #undef elf_backend_relocs_compatible
6691 #undef elf_backend_add_symbol_hook
6692 #define elf_backend_add_symbol_hook \
6693 elf_vxworks_add_symbol_hook
6694 #undef elf_backend_link_output_symbol_hook
6695 #define elf_backend_link_output_symbol_hook \
6696 elf_vxworks_link_output_symbol_hook
6697 #undef elf_backend_emit_relocs
6698 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6699 #undef elf_backend_final_write_processing
6700 #define elf_backend_final_write_processing \
6701 elf_vxworks_final_write_processing
6702 #undef elf_backend_static_tls_alignment
6704 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6706 #undef elf_backend_want_plt_sym
6707 #define elf_backend_want_plt_sym 1
6710 #define elf32_bed elf32_i386_vxworks_bed
6712 #include "elf32-target.h"