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 lazy procedure linkage table. */
546 #define LAZY_PLT_ENTRY_SIZE 16
548 /* The size in bytes of an entry in the non-lazy procedure linkage
551 #define NON_LAZY_PLT_ENTRY_SIZE 8
553 /* The first entry in an absolute lazy procedure linkage table looks
554 like this. See the SVR4 ABI i386 supplement to see how this works.
555 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
557 static const bfd_byte elf_i386_lazy_plt0_entry
[12] =
559 0xff, 0x35, /* pushl contents of address */
560 0, 0, 0, 0, /* replaced with address of .got + 4. */
561 0xff, 0x25, /* jmp indirect */
562 0, 0, 0, 0 /* replaced with address of .got + 8. */
565 /* Subsequent entries in an absolute lazy procedure linkage table look
568 static const bfd_byte elf_i386_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
570 0xff, 0x25, /* jmp indirect */
571 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
572 0x68, /* pushl immediate */
573 0, 0, 0, 0, /* replaced with offset into relocation table. */
574 0xe9, /* jmp relative */
575 0, 0, 0, 0 /* replaced with offset to start of .plt. */
578 /* The first entry in a PIC lazy procedure linkage table look like
579 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
580 lazy_plt->plt0_pad_byte. */
582 static const bfd_byte elf_i386_pic_lazy_plt0_entry
[12] =
584 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
585 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
588 /* Subsequent entries in a PIC lazy procedure linkage table look like
591 static const bfd_byte elf_i386_pic_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
593 0xff, 0xa3, /* jmp *offset(%ebx) */
594 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
595 0x68, /* pushl immediate */
596 0, 0, 0, 0, /* replaced with offset into relocation table. */
597 0xe9, /* jmp relative */
598 0, 0, 0, 0 /* replaced with offset to start of .plt. */
601 /* Entries in the non-lazy procedure linkage table look like this. */
603 static const bfd_byte elf_i386_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
605 0xff, 0x25, /* jmp indirect */
606 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
607 0x66, 0x90 /* xchg %ax,%ax */
610 /* Entries in the PIC non-lazy procedure linkage table look like
613 static const bfd_byte elf_i386_pic_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
615 0xff, 0xa3, /* jmp *offset(%ebx) */
616 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
617 0x66, 0x90 /* xchg %ax,%ax */
620 /* .eh_frame covering the lazy .plt section. */
622 static const bfd_byte elf_i386_eh_frame_lazy_plt
[] =
624 #define PLT_CIE_LENGTH 20
625 #define PLT_FDE_LENGTH 36
626 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
627 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
628 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
629 0, 0, 0, 0, /* CIE ID */
631 'z', 'R', 0, /* Augmentation string */
632 1, /* Code alignment factor */
633 0x7c, /* Data alignment factor */
634 8, /* Return address column */
635 1, /* Augmentation size */
636 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
637 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
638 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
639 DW_CFA_nop
, DW_CFA_nop
,
641 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
642 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
643 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
644 0, 0, 0, 0, /* .plt size goes here */
645 0, /* Augmentation size */
646 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
647 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
648 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
649 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
650 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
651 11, /* Block length */
652 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
653 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
654 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
655 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
656 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
659 /* .eh_frame covering the non-lazy .plt section. */
661 static const bfd_byte elf_i386_eh_frame_non_lazy_plt
[] =
663 #define PLT_GOT_FDE_LENGTH 16
664 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
665 0, 0, 0, 0, /* CIE ID */
667 'z', 'R', 0, /* Augmentation string */
668 1, /* Code alignment factor */
669 0x7c, /* Data alignment factor */
670 8, /* Return address column */
671 1, /* Augmentation size */
672 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
673 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
674 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
675 DW_CFA_nop
, DW_CFA_nop
,
677 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
678 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
679 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
680 0, 0, 0, 0, /* non-lazy .plt size goes here */
681 0, /* Augmentation size */
682 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
685 struct elf_i386_lazy_plt_layout
687 /* The first entry in an absolute lazy procedure linkage table looks
689 const bfd_byte
*plt0_entry
;
690 unsigned int plt0_entry_size
;
692 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
694 unsigned int plt0_got1_offset
;
695 unsigned int plt0_got2_offset
;
697 /* Later entries in an absolute lazy procedure linkage table look
699 const bfd_byte
*plt_entry
;
700 unsigned int plt_entry_size
;
702 /* Offsets into plt_entry that are to be replaced with... */
703 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
704 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
705 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
707 /* Offset into plt_entry where the initial value of the GOT entry
709 unsigned int plt_lazy_offset
;
711 /* The first entry in a PIC lazy procedure linkage table looks like
713 const bfd_byte
*pic_plt0_entry
;
715 /* Subsequent entries in a PIC lazy procedure linkage table look
717 const bfd_byte
*pic_plt_entry
;
719 /* .eh_frame covering the lazy .plt section. */
720 const bfd_byte
*eh_frame_plt
;
721 unsigned int eh_frame_plt_size
;
724 struct elf_i386_non_lazy_plt_layout
726 /* Entries in an absolute non-lazy procedure linkage table look like
728 const bfd_byte
*plt_entry
;
729 /* Entries in a PIC non-lazy procedure linkage table look like this. */
730 const bfd_byte
*pic_plt_entry
;
732 unsigned int plt_entry_size
;
734 /* Offsets into plt_entry that are to be replaced with... */
735 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
737 /* .eh_frame covering the non-lazy .plt section. */
738 const bfd_byte
*eh_frame_plt
;
739 unsigned int eh_frame_plt_size
;
742 struct elf_i386_plt_layout
744 /* The first entry in a lazy procedure linkage table looks like this. */
745 const bfd_byte
*plt0_entry
;
746 /* Entries in a procedure linkage table look like this. */
747 const bfd_byte
*plt_entry
;
748 unsigned int plt_entry_size
;
751 unsigned int has_plt0
;
753 /* Offsets into plt_entry that are to be replaced with... */
754 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
756 /* .eh_frame covering the .plt section. */
757 const bfd_byte
*eh_frame_plt
;
758 unsigned int eh_frame_plt_size
;
761 /* These are the standard parameters. */
762 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt
=
764 elf_i386_lazy_plt0_entry
, /* plt0_entry */
765 sizeof (elf_i386_lazy_plt0_entry
), /* plt0_entry_size */
766 2, /* plt0_got1_offset */
767 8, /* plt0_got2_offset */
768 elf_i386_lazy_plt_entry
, /* plt_entry */
769 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
770 2, /* plt_got_offset */
771 7, /* plt_reloc_offset */
772 12, /* plt_plt_offset */
773 6, /* plt_lazy_offset */
774 elf_i386_pic_lazy_plt0_entry
, /* pic_plt0_entry */
775 elf_i386_pic_lazy_plt_entry
, /* pic_plt_entry */
776 elf_i386_eh_frame_lazy_plt
, /* eh_frame_plt */
777 sizeof (elf_i386_eh_frame_lazy_plt
) /* eh_frame_plt_size */
780 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt
=
782 elf_i386_non_lazy_plt_entry
, /* plt_entry */
783 elf_i386_pic_non_lazy_plt_entry
, /* pic_plt_entry */
784 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
785 2, /* plt_got_offset */
786 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
787 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
791 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
792 for the PLTResolve stub and then for each PLT entry. */
793 #define PLTRESOLVE_RELOCS_SHLIB 0
794 #define PLTRESOLVE_RELOCS 2
795 #define PLT_NON_JUMP_SLOT_RELOCS 2
797 /* Architecture-specific backend data for i386. */
799 struct elf_i386_backend_data
801 /* Value used to fill the unused bytes of the first PLT entry. */
802 bfd_byte plt0_pad_byte
;
813 #define get_elf_i386_backend_data(abfd) \
814 ((const struct elf_i386_backend_data *) \
815 get_elf_backend_data (abfd)->arch_data)
817 /* These are the standard parameters. */
818 static const struct elf_i386_backend_data elf_i386_arch_bed
=
820 0, /* plt0_pad_byte */
824 #define elf_backend_arch_data &elf_i386_arch_bed
826 /* Is a undefined weak symbol which is resolved to 0. Reference to an
827 undefined weak symbol is resolved to 0 when building executable if
829 1. Has non-GOT/non-PLT relocations in text section. Or
830 2. Has no GOT/PLT relocation.
832 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
833 ((EH)->elf.root.type == bfd_link_hash_undefweak \
834 && bfd_link_executable (INFO) \
835 && (elf_i386_hash_table (INFO)->interp == NULL \
837 || (EH)->has_non_got_reloc \
838 || !(INFO)->dynamic_undefined_weak))
840 /* i386 ELF linker hash entry. */
842 struct elf_i386_link_hash_entry
844 struct elf_link_hash_entry elf
;
846 /* Track dynamic relocs copied for this symbol. */
847 struct elf_dyn_relocs
*dyn_relocs
;
849 #define GOT_UNKNOWN 0
853 #define GOT_TLS_IE_POS 5
854 #define GOT_TLS_IE_NEG 6
855 #define GOT_TLS_IE_BOTH 7
856 #define GOT_TLS_GDESC 8
857 #define GOT_TLS_GD_BOTH_P(type) \
858 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
859 #define GOT_TLS_GD_P(type) \
860 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
861 #define GOT_TLS_GDESC_P(type) \
862 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
863 #define GOT_TLS_GD_ANY_P(type) \
864 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
865 unsigned char tls_type
;
867 /* Symbol is referenced by R_386_GOTOFF relocation. */
868 unsigned int gotoff_ref
: 1;
870 /* Symbol has GOT or PLT relocations. */
871 unsigned int has_got_reloc
: 1;
873 /* Symbol has non-GOT/non-PLT relocations in text sections. */
874 unsigned int has_non_got_reloc
: 1;
876 /* Don't call finish_dynamic_symbol on this symbol. */
877 unsigned int no_finish_dynamic_symbol
: 1;
879 /* 0: symbol isn't ___tls_get_addr.
880 1: symbol is ___tls_get_addr.
881 2: symbol is unknown. */
882 unsigned int tls_get_addr
: 2;
884 /* Reference count of C/C++ function pointer relocations in read-write
885 section which can be resolved at run-time. */
886 bfd_signed_vma func_pointer_refcount
;
888 /* Information about the GOT PLT entry. Filled when there are both
889 GOT and PLT relocations against the same function. */
890 union gotplt_union plt_got
;
892 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
893 starting at the end of the jump table. */
897 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
899 struct elf_i386_obj_tdata
901 struct elf_obj_tdata root
;
903 /* tls_type for each local got entry. */
904 char *local_got_tls_type
;
906 /* GOTPLT entries for TLS descriptors. */
907 bfd_vma
*local_tlsdesc_gotent
;
910 #define elf_i386_tdata(abfd) \
911 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
913 #define elf_i386_local_got_tls_type(abfd) \
914 (elf_i386_tdata (abfd)->local_got_tls_type)
916 #define elf_i386_local_tlsdesc_gotent(abfd) \
917 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
919 #define is_i386_elf(bfd) \
920 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
921 && elf_tdata (bfd) != NULL \
922 && elf_object_id (bfd) == I386_ELF_DATA)
925 elf_i386_mkobject (bfd
*abfd
)
927 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
931 /* i386 ELF linker hash table. */
933 struct elf_i386_link_hash_table
935 struct elf_link_hash_table elf
;
937 /* Short-cuts to get to dynamic linker sections. */
939 asection
*plt_eh_frame
;
941 asection
*plt_got_eh_frame
;
943 /* Parameters describing PLT generation. */
944 struct elf_i386_plt_layout plt
;
946 /* Parameters describing lazy PLT generation. */
947 const struct elf_i386_lazy_plt_layout
*lazy_plt
;
949 /* Parameters describing non-lazy PLT generation. */
950 const struct elf_i386_non_lazy_plt_layout
*non_lazy_plt
;
954 bfd_signed_vma refcount
;
958 /* The amount of space used by the reserved portion of the sgotplt
959 section, plus whatever space is used by the jump slots. */
960 bfd_vma sgotplt_jump_table_size
;
962 /* Small local sym cache. */
963 struct sym_cache sym_cache
;
965 /* _TLS_MODULE_BASE_ symbol. */
966 struct bfd_link_hash_entry
*tls_module_base
;
968 /* Used by local STT_GNU_IFUNC symbols. */
969 htab_t loc_hash_table
;
970 void * loc_hash_memory
;
972 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
975 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
976 bfd_vma next_tls_desc_index
;
978 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
979 bfd_vma next_jump_slot_index
;
981 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
982 bfd_vma next_irelative_index
;
984 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
985 to read-only sections. */
986 bfd_boolean readonly_dynrelocs_against_ifunc
;
989 /* Get the i386 ELF linker hash table from a link_info structure. */
991 #define elf_i386_hash_table(p) \
992 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
993 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
995 #define elf_i386_compute_jump_table_size(htab) \
996 ((htab)->elf.srelplt->reloc_count * 4)
998 /* Create an entry in an i386 ELF linker hash table. */
1000 static struct bfd_hash_entry
*
1001 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1002 struct bfd_hash_table
*table
,
1005 /* Allocate the structure if it has not already been allocated by a
1009 entry
= (struct bfd_hash_entry
*)
1010 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
1015 /* Call the allocation method of the superclass. */
1016 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1019 struct elf_i386_link_hash_entry
*eh
;
1021 eh
= (struct elf_i386_link_hash_entry
*) entry
;
1022 eh
->dyn_relocs
= NULL
;
1023 eh
->tls_type
= GOT_UNKNOWN
;
1025 eh
->has_got_reloc
= 0;
1026 eh
->has_non_got_reloc
= 0;
1027 eh
->no_finish_dynamic_symbol
= 0;
1028 eh
->tls_get_addr
= 2;
1029 eh
->func_pointer_refcount
= 0;
1030 eh
->plt_got
.offset
= (bfd_vma
) -1;
1031 eh
->tlsdesc_got
= (bfd_vma
) -1;
1037 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1038 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1039 as global symbol. We reuse indx and dynstr_index for local symbol
1040 hash since they aren't used by global symbols in this backend. */
1043 elf_i386_local_htab_hash (const void *ptr
)
1045 struct elf_link_hash_entry
*h
1046 = (struct elf_link_hash_entry
*) ptr
;
1047 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
1050 /* Compare local hash entries. */
1053 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
1055 struct elf_link_hash_entry
*h1
1056 = (struct elf_link_hash_entry
*) ptr1
;
1057 struct elf_link_hash_entry
*h2
1058 = (struct elf_link_hash_entry
*) ptr2
;
1060 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
1063 /* Find and/or create a hash entry for local symbol. */
1065 static struct elf_link_hash_entry
*
1066 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
1067 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1070 struct elf_i386_link_hash_entry e
, *ret
;
1071 asection
*sec
= abfd
->sections
;
1072 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1073 ELF32_R_SYM (rel
->r_info
));
1076 e
.elf
.indx
= sec
->id
;
1077 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1078 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1079 create
? INSERT
: NO_INSERT
);
1086 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
1090 ret
= (struct elf_i386_link_hash_entry
*)
1091 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1092 sizeof (struct elf_i386_link_hash_entry
));
1095 memset (ret
, 0, sizeof (*ret
));
1096 ret
->elf
.indx
= sec
->id
;
1097 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1098 ret
->elf
.dynindx
= -1;
1099 ret
->func_pointer_refcount
= 0;
1100 ret
->plt_got
.offset
= (bfd_vma
) -1;
1106 /* Destroy an i386 ELF linker hash table. */
1109 elf_i386_link_hash_table_free (bfd
*obfd
)
1111 struct elf_i386_link_hash_table
*htab
1112 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1114 if (htab
->loc_hash_table
)
1115 htab_delete (htab
->loc_hash_table
);
1116 if (htab
->loc_hash_memory
)
1117 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1118 _bfd_elf_link_hash_table_free (obfd
);
1121 /* Create an i386 ELF linker hash table. */
1123 static struct bfd_link_hash_table
*
1124 elf_i386_link_hash_table_create (bfd
*abfd
)
1126 struct elf_i386_link_hash_table
*ret
;
1127 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1129 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1133 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1134 elf_i386_link_hash_newfunc
,
1135 sizeof (struct elf_i386_link_hash_entry
),
1142 ret
->loc_hash_table
= htab_try_create (1024,
1143 elf_i386_local_htab_hash
,
1144 elf_i386_local_htab_eq
,
1146 ret
->loc_hash_memory
= objalloc_create ();
1147 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1149 elf_i386_link_hash_table_free (abfd
);
1152 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1154 return &ret
->elf
.root
;
1157 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1160 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1161 struct elf_link_hash_entry
*dir
,
1162 struct elf_link_hash_entry
*ind
)
1164 struct elf_i386_link_hash_entry
*edir
, *eind
;
1166 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1167 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1169 if (eind
->dyn_relocs
!= NULL
)
1171 if (edir
->dyn_relocs
!= NULL
)
1173 struct elf_dyn_relocs
**pp
;
1174 struct elf_dyn_relocs
*p
;
1176 /* Add reloc counts against the indirect sym to the direct sym
1177 list. Merge any entries against the same section. */
1178 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1180 struct elf_dyn_relocs
*q
;
1182 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1183 if (q
->sec
== p
->sec
)
1185 q
->pc_count
+= p
->pc_count
;
1186 q
->count
+= p
->count
;
1193 *pp
= edir
->dyn_relocs
;
1196 edir
->dyn_relocs
= eind
->dyn_relocs
;
1197 eind
->dyn_relocs
= NULL
;
1200 if (ind
->root
.type
== bfd_link_hash_indirect
1201 && dir
->got
.refcount
<= 0)
1203 edir
->tls_type
= eind
->tls_type
;
1204 eind
->tls_type
= GOT_UNKNOWN
;
1207 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1208 generate a R_386_COPY reloc. */
1209 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1211 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1212 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1214 if (ELIMINATE_COPY_RELOCS
1215 && ind
->root
.type
!= bfd_link_hash_indirect
1216 && dir
->dynamic_adjusted
)
1218 /* If called to transfer flags for a weakdef during processing
1219 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1220 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1221 if (dir
->versioned
!= versioned_hidden
)
1222 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1223 dir
->ref_regular
|= ind
->ref_regular
;
1224 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1225 dir
->needs_plt
|= ind
->needs_plt
;
1226 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1230 if (eind
->func_pointer_refcount
> 0)
1232 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1233 eind
->func_pointer_refcount
= 0;
1236 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1240 /* Return TRUE if the TLS access code sequence support transition
1244 elf_i386_check_tls_transition (asection
*sec
,
1246 Elf_Internal_Shdr
*symtab_hdr
,
1247 struct elf_link_hash_entry
**sym_hashes
,
1248 unsigned int r_type
,
1249 const Elf_Internal_Rela
*rel
,
1250 const Elf_Internal_Rela
*relend
)
1252 unsigned int val
, type
, reg
;
1253 unsigned long r_symndx
;
1254 struct elf_link_hash_entry
*h
;
1257 bfd_boolean indirect_call
, tls_get_addr
;
1259 offset
= rel
->r_offset
;
1264 if (offset
< 2 || (rel
+ 1) >= relend
)
1267 indirect_call
= FALSE
;
1268 call
= contents
+ offset
+ 4;
1271 if (r_type
== R_386_TLS_GD
)
1273 /* Check transition from GD access model. Only
1274 leal foo@tlsgd(,%ebx,1), %eax
1275 call ___tls_get_addr@PLT
1277 leal foo@tlsgd(%ebx) %eax
1278 call ___tls_get_addr@PLT
1281 leal foo@tlsgd(%reg), %eax
1282 call *___tls_get_addr@GOT(%reg)
1283 which may be converted to
1284 addr32 call ___tls_get_addr
1285 can transit to different access model. */
1286 if ((offset
+ 10) > sec
->size
1287 || (type
!= 0x8d && type
!= 0x04))
1292 /* leal foo@tlsgd(,%ebx,1), %eax
1293 call ___tls_get_addr@PLT */
1297 if (*(call
- 7) != 0x8d
1305 leal foo@tlsgd(%ebx), %eax
1306 call ___tls_get_addr@PLT
1309 leal foo@tlsgd(%reg), %eax
1310 call *___tls_get_addr@GOT(%reg)
1311 which may be converted to
1312 addr32 call ___tls_get_addr
1314 %eax can't be used as the GOT base register since it
1315 is used to pass parameter to ___tls_get_addr. */
1317 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1320 indirect_call
= call
[0] == 0xff;
1321 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
1322 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1324 && (call
[1] & 0xf8) == 0x90
1325 && (call
[1] & 0x7) == reg
))
1331 /* Check transition from LD access model. Only
1332 leal foo@tlsldm(%ebx), %eax
1333 call ___tls_get_addr@PLT
1335 leal foo@tlsldm(%reg), %eax
1336 call *___tls_get_addr@GOT(%reg)
1337 which may be converted to
1338 addr32 call ___tls_get_addr
1339 can transit to different access model. */
1340 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1343 /* %eax can't be used as the GOT base register since it is
1344 used to pass parameter to ___tls_get_addr. */
1346 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1349 indirect_call
= call
[0] == 0xff;
1350 if (!(reg
== 3 && call
[0] == 0xe8)
1351 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1353 && (call
[1] & 0xf8) == 0x90
1354 && (call
[1] & 0x7) == reg
))
1358 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1359 if (r_symndx
< symtab_hdr
->sh_info
)
1362 tls_get_addr
= FALSE
;
1363 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1364 if (h
!= NULL
&& h
->root
.root
.string
!= NULL
)
1366 struct elf_i386_link_hash_entry
*eh
1367 = (struct elf_i386_link_hash_entry
*) h
;
1368 tls_get_addr
= eh
->tls_get_addr
== 1;
1369 if (eh
->tls_get_addr
> 1)
1371 /* Use strncmp to check ___tls_get_addr since
1372 ___tls_get_addr may be versioned. */
1373 if (strncmp (h
->root
.root
.string
, "___tls_get_addr", 15)
1376 eh
->tls_get_addr
= 1;
1377 tls_get_addr
= TRUE
;
1380 eh
->tls_get_addr
= 0;
1386 else if (indirect_call
)
1387 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
1389 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1390 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
1393 /* Check transition from IE access model:
1394 movl foo@indntpoff(%rip), %eax
1395 movl foo@indntpoff(%rip), %reg
1396 addl foo@indntpoff(%rip), %reg
1399 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1402 /* Check "movl foo@tpoff(%rip), %eax" first. */
1403 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1410 /* Check movl|addl foo@tpoff(%rip), %reg. */
1411 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1412 return ((type
== 0x8b || type
== 0x03)
1413 && (val
& 0xc7) == 0x05);
1415 case R_386_TLS_GOTIE
:
1416 case R_386_TLS_IE_32
:
1417 /* Check transition from {IE_32,GOTIE} access model:
1418 subl foo@{tpoff,gontoff}(%reg1), %reg2
1419 movl foo@{tpoff,gontoff}(%reg1), %reg2
1420 addl foo@{tpoff,gontoff}(%reg1), %reg2
1423 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1426 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1427 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1430 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1431 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1433 case R_386_TLS_GOTDESC
:
1434 /* Check transition from GDesc access model:
1435 leal x@tlsdesc(%ebx), %eax
1437 Make sure it's a leal adding ebx to a 32-bit offset
1438 into any register, although it's probably almost always
1441 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1444 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1447 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1448 return (val
& 0xc7) == 0x83;
1450 case R_386_TLS_DESC_CALL
:
1451 /* Check transition from GDesc access model:
1452 call *x@tlsdesc(%eax)
1454 if (offset
+ 2 <= sec
->size
)
1456 /* Make sure that it's a call *x@tlsdesc(%eax). */
1457 call
= contents
+ offset
;
1458 return call
[0] == 0xff && call
[1] == 0x10;
1468 /* Return TRUE if the TLS access transition is OK or no transition
1469 will be performed. Update R_TYPE if there is a transition. */
1472 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1473 asection
*sec
, bfd_byte
*contents
,
1474 Elf_Internal_Shdr
*symtab_hdr
,
1475 struct elf_link_hash_entry
**sym_hashes
,
1476 unsigned int *r_type
, int tls_type
,
1477 const Elf_Internal_Rela
*rel
,
1478 const Elf_Internal_Rela
*relend
,
1479 struct elf_link_hash_entry
*h
,
1480 unsigned long r_symndx
,
1481 bfd_boolean from_relocate_section
)
1483 unsigned int from_type
= *r_type
;
1484 unsigned int to_type
= from_type
;
1485 bfd_boolean check
= TRUE
;
1487 /* Skip TLS transition for functions. */
1489 && (h
->type
== STT_FUNC
1490 || h
->type
== STT_GNU_IFUNC
))
1496 case R_386_TLS_GOTDESC
:
1497 case R_386_TLS_DESC_CALL
:
1498 case R_386_TLS_IE_32
:
1500 case R_386_TLS_GOTIE
:
1501 if (bfd_link_executable (info
))
1504 to_type
= R_386_TLS_LE_32
;
1505 else if (from_type
!= R_386_TLS_IE
1506 && from_type
!= R_386_TLS_GOTIE
)
1507 to_type
= R_386_TLS_IE_32
;
1510 /* When we are called from elf_i386_relocate_section, there may
1511 be additional transitions based on TLS_TYPE. */
1512 if (from_relocate_section
)
1514 unsigned int new_to_type
= to_type
;
1516 if (bfd_link_executable (info
)
1519 && (tls_type
& GOT_TLS_IE
))
1520 new_to_type
= R_386_TLS_LE_32
;
1522 if (to_type
== R_386_TLS_GD
1523 || to_type
== R_386_TLS_GOTDESC
1524 || to_type
== R_386_TLS_DESC_CALL
)
1526 if (tls_type
== GOT_TLS_IE_POS
)
1527 new_to_type
= R_386_TLS_GOTIE
;
1528 else if (tls_type
& GOT_TLS_IE
)
1529 new_to_type
= R_386_TLS_IE_32
;
1532 /* We checked the transition before when we were called from
1533 elf_i386_check_relocs. We only want to check the new
1534 transition which hasn't been checked before. */
1535 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1536 to_type
= new_to_type
;
1542 if (bfd_link_executable (info
))
1543 to_type
= R_386_TLS_LE_32
;
1550 /* Return TRUE if there is no transition. */
1551 if (from_type
== to_type
)
1554 /* Check if the transition can be performed. */
1556 && ! elf_i386_check_tls_transition (sec
, contents
,
1557 symtab_hdr
, sym_hashes
,
1558 from_type
, rel
, relend
))
1560 reloc_howto_type
*from
, *to
;
1563 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1564 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1567 name
= h
->root
.root
.string
;
1570 struct elf_i386_link_hash_table
*htab
;
1572 htab
= elf_i386_hash_table (info
);
1577 Elf_Internal_Sym
*isym
;
1579 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1581 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1586 /* xgettext:c-format */
1587 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1588 "in section `%A' failed"),
1589 abfd
, from
->name
, to
->name
, name
,
1590 (unsigned long) rel
->r_offset
, sec
);
1591 bfd_set_error (bfd_error_bad_value
);
1599 /* With the local symbol, foo, we convert
1600 mov foo@GOT[(%reg1)], %reg2
1602 lea foo[@GOTOFF(%reg1)], %reg2
1604 call/jmp *foo@GOT[(%reg)]
1606 nop call foo/jmp foo nop
1607 When PIC is false, convert
1608 test %reg1, foo@GOT[(%reg2)]
1612 binop foo@GOT[(%reg1)], %reg2
1615 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1620 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1622 Elf_Internal_Rela
*irel
,
1623 struct elf_link_hash_entry
*h
,
1624 bfd_boolean
*converted
,
1625 struct bfd_link_info
*link_info
)
1627 struct elf_i386_link_hash_table
*htab
;
1628 unsigned int opcode
;
1630 bfd_boolean baseless
;
1631 Elf_Internal_Sym
*isym
;
1632 unsigned int addend
;
1636 bfd_boolean to_reloc_32
;
1637 unsigned int r_type
;
1638 unsigned int r_symndx
;
1639 bfd_vma roff
= irel
->r_offset
;
1644 /* Addend for R_386_GOT32X relocations must be 0. */
1645 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1649 htab
= elf_i386_hash_table (link_info
);
1650 is_pic
= bfd_link_pic (link_info
);
1652 r_type
= ELF32_R_TYPE (irel
->r_info
);
1653 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1655 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1656 baseless
= (modrm
& 0xc7) == 0x5;
1658 if (baseless
&& is_pic
)
1660 /* For PIC, disallow R_386_GOT32X without a base register
1661 since we don't know what the GOT base is. */
1666 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1668 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1671 name
= h
->root
.root
.string
;
1674 /* xgettext:c-format */
1675 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1676 " register can not be used when making a shared object"),
1681 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1683 /* Convert to R_386_32 if PIC is false or there is no base
1685 to_reloc_32
= !is_pic
|| baseless
;
1687 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1691 if (opcode
== 0x0ff)
1692 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1693 goto convert_branch
;
1695 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1696 "test %reg1, foo@GOT(%reg2)" and
1697 "binop foo@GOT[(%reg1)], %reg2". */
1701 /* Undefined weak symbol is only bound locally in executable
1702 and its reference is resolved as 0. */
1703 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
, TRUE
,
1704 elf_i386_hash_entry (h
)))
1708 /* No direct branch to 0 for PIC. */
1712 goto convert_branch
;
1716 /* We can convert load of address 0 to R_386_32. */
1724 /* We have "call/jmp *foo@GOT[(%reg)]". */
1725 if ((h
->root
.type
== bfd_link_hash_defined
1726 || h
->root
.type
== bfd_link_hash_defweak
)
1727 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1729 /* The function is locally defined. */
1731 /* Convert R_386_GOT32X to R_386_PC32. */
1732 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1734 struct elf_i386_link_hash_entry
*eh
1735 = (struct elf_i386_link_hash_entry
*) h
;
1737 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1740 /* To support TLS optimization, always use addr32 prefix
1741 for "call *___tls_get_addr@GOT(%reg)". */
1742 if (eh
&& eh
->tls_get_addr
== 1)
1745 nop_offset
= irel
->r_offset
- 2;
1749 nop
= link_info
->call_nop_byte
;
1750 if (link_info
->call_nop_as_suffix
)
1752 nop_offset
= roff
+ 3;
1753 irel
->r_offset
-= 1;
1756 nop_offset
= roff
- 2;
1761 /* Convert to "jmp foo nop". */
1764 nop_offset
= roff
+ 3;
1765 irel
->r_offset
-= 1;
1768 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1769 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1770 /* When converting to PC-relative relocation, we
1771 need to adjust addend by -4. */
1772 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1773 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1780 /* We have "mov foo@GOT[(%re1g)], %reg2",
1781 "test %reg1, foo@GOT(%reg2)" and
1782 "binop foo@GOT[(%reg1)], %reg2".
1784 Avoid optimizing _DYNAMIC since ld.so may use its
1785 link-time address. */
1786 if (h
== htab
->elf
.hdynamic
)
1789 /* def_regular is set by an assignment in a linker script in
1790 bfd_elf_record_link_assignment. */
1792 || h
->root
.type
== bfd_link_hash_defined
1793 || h
->root
.type
== bfd_link_hash_defweak
)
1794 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1801 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1802 "mov $foo, %reg2" with R_386_32. */
1804 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1805 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1810 /* Convert "mov foo@GOT(%reg1), %reg2" to
1811 "lea foo@GOTOFF(%reg1), %reg2". */
1812 r_type
= R_386_GOTOFF
;
1818 /* Only R_386_32 is supported. */
1824 /* Convert "test %reg1, foo@GOT(%reg2)" to
1825 "test $foo, %reg1". */
1826 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1831 /* Convert "binop foo@GOT(%reg1), %reg2" to
1832 "binop $foo, %reg2". */
1834 | (modrm
& 0x38) >> 3
1838 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1842 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1843 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1852 /* Rename some of the generic section flags to better document how they
1854 #define need_convert_load sec_flg0
1855 #define check_relocs_failed sec_flg1
1857 /* Look through the relocs for a section during the first phase, and
1858 calculate needed space in the global offset table, procedure linkage
1859 table, and dynamic reloc sections. */
1862 elf_i386_check_relocs (bfd
*abfd
,
1863 struct bfd_link_info
*info
,
1865 const Elf_Internal_Rela
*relocs
)
1867 struct elf_i386_link_hash_table
*htab
;
1868 Elf_Internal_Shdr
*symtab_hdr
;
1869 struct elf_link_hash_entry
**sym_hashes
;
1870 const Elf_Internal_Rela
*rel
;
1871 const Elf_Internal_Rela
*rel_end
;
1875 if (bfd_link_relocatable (info
))
1878 /* Don't do anything special with non-loaded, non-alloced sections.
1879 In particular, any relocs in such sections should not affect GOT
1880 and PLT reference counting (ie. we don't allow them to create GOT
1881 or PLT entries), there's no possibility or desire to optimize TLS
1882 relocs, and there's not much point in propagating relocs to shared
1883 libs that the dynamic linker won't relocate. */
1884 if ((sec
->flags
& SEC_ALLOC
) == 0)
1887 BFD_ASSERT (is_i386_elf (abfd
));
1889 htab
= elf_i386_hash_table (info
);
1892 sec
->check_relocs_failed
= 1;
1896 /* Get the section contents. */
1897 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1898 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1899 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1901 sec
->check_relocs_failed
= 1;
1905 symtab_hdr
= &elf_symtab_hdr (abfd
);
1906 sym_hashes
= elf_sym_hashes (abfd
);
1910 rel_end
= relocs
+ sec
->reloc_count
;
1911 for (rel
= relocs
; rel
< rel_end
; rel
++)
1913 unsigned int r_type
;
1914 unsigned long r_symndx
;
1915 struct elf_link_hash_entry
*h
;
1916 struct elf_i386_link_hash_entry
*eh
;
1917 Elf_Internal_Sym
*isym
;
1919 bfd_boolean size_reloc
;
1921 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1922 r_type
= ELF32_R_TYPE (rel
->r_info
);
1924 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1926 /* xgettext:c-format */
1927 _bfd_error_handler (_("%B: bad symbol index: %d"),
1932 if (r_symndx
< symtab_hdr
->sh_info
)
1934 /* A local symbol. */
1935 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1940 /* Check relocation against local STT_GNU_IFUNC symbol. */
1941 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1943 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1947 /* Fake a STT_GNU_IFUNC symbol. */
1948 h
->type
= STT_GNU_IFUNC
;
1951 h
->forced_local
= 1;
1952 h
->root
.type
= bfd_link_hash_defined
;
1960 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1961 while (h
->root
.type
== bfd_link_hash_indirect
1962 || h
->root
.type
== bfd_link_hash_warning
)
1963 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1966 eh
= (struct elf_i386_link_hash_entry
*) h
;
1969 if (r_type
== R_386_GOTOFF
)
1972 /* It is referenced by a non-shared object. */
1974 h
->root
.non_ir_ref
= 1;
1976 if (h
->type
== STT_GNU_IFUNC
)
1977 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1978 |= elf_gnu_symbol_ifunc
;
1981 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
1982 symtab_hdr
, sym_hashes
,
1983 &r_type
, GOT_UNKNOWN
,
1984 rel
, rel_end
, h
, r_symndx
, FALSE
))
1990 htab
->tls_ldm_got
.refcount
+= 1;
1994 /* This symbol requires a procedure linkage table entry. We
1995 actually build the entry in adjust_dynamic_symbol,
1996 because this might be a case of linking PIC code which is
1997 never referenced by a dynamic object, in which case we
1998 don't need to generate a procedure linkage table entry
2001 /* If this is a local symbol, we resolve it directly without
2002 creating a procedure linkage table entry. */
2006 eh
->has_got_reloc
= 1;
2008 h
->plt
.refcount
+= 1;
2015 case R_386_TLS_IE_32
:
2017 case R_386_TLS_GOTIE
:
2018 if (!bfd_link_executable (info
))
2019 info
->flags
|= DF_STATIC_TLS
;
2025 case R_386_TLS_GOTDESC
:
2026 case R_386_TLS_DESC_CALL
:
2027 /* This symbol requires a global offset table entry. */
2029 int tls_type
, old_tls_type
;
2036 tls_type
= GOT_NORMAL
;
2038 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
2039 case R_386_TLS_GOTDESC
:
2040 case R_386_TLS_DESC_CALL
:
2041 tls_type
= GOT_TLS_GDESC
; break;
2042 case R_386_TLS_IE_32
:
2043 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
2044 tls_type
= GOT_TLS_IE_NEG
;
2046 /* If this is a GD->IE transition, we may use either of
2047 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2048 tls_type
= GOT_TLS_IE
;
2051 case R_386_TLS_GOTIE
:
2052 tls_type
= GOT_TLS_IE_POS
; break;
2057 h
->got
.refcount
+= 1;
2058 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2062 bfd_signed_vma
*local_got_refcounts
;
2064 /* This is a global offset table entry for a local symbol. */
2065 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2066 if (local_got_refcounts
== NULL
)
2070 size
= symtab_hdr
->sh_info
;
2071 size
*= (sizeof (bfd_signed_vma
)
2072 + sizeof (bfd_vma
) + sizeof(char));
2073 local_got_refcounts
= (bfd_signed_vma
*)
2074 bfd_zalloc (abfd
, size
);
2075 if (local_got_refcounts
== NULL
)
2077 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2078 elf_i386_local_tlsdesc_gotent (abfd
)
2079 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2080 elf_i386_local_got_tls_type (abfd
)
2081 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2083 local_got_refcounts
[r_symndx
] += 1;
2084 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
2087 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
2088 tls_type
|= old_tls_type
;
2089 /* If a TLS symbol is accessed using IE at least once,
2090 there is no point to use dynamic model for it. */
2091 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2092 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2093 || (tls_type
& GOT_TLS_IE
) == 0))
2095 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
2096 tls_type
= old_tls_type
;
2097 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2098 && GOT_TLS_GD_ANY_P (tls_type
))
2099 tls_type
|= old_tls_type
;
2103 name
= h
->root
.root
.string
;
2105 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2108 /* xgettext:c-format */
2109 (_("%B: `%s' accessed both as normal and "
2110 "thread local symbol"),
2112 bfd_set_error (bfd_error_bad_value
);
2117 if (old_tls_type
!= tls_type
)
2120 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
2122 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2130 if (r_type
!= R_386_TLS_IE
)
2133 eh
->has_got_reloc
= 1;
2138 case R_386_TLS_LE_32
:
2141 eh
->has_got_reloc
= 1;
2142 if (bfd_link_executable (info
))
2144 info
->flags
|= DF_STATIC_TLS
;
2149 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2150 eh
->has_non_got_reloc
= 1;
2152 /* We are called after all symbols have been resolved. Only
2153 relocation against STT_GNU_IFUNC symbol must go through
2156 && (bfd_link_executable (info
)
2157 || h
->type
== STT_GNU_IFUNC
))
2159 /* If this reloc is in a read-only section, we might
2160 need a copy reloc. We can't check reliably at this
2161 stage whether the section is read-only, as input
2162 sections have not yet been mapped to output sections.
2163 Tentatively set the flag for now, and correct in
2164 adjust_dynamic_symbol. */
2167 /* We may need a .plt entry if the symbol is a function
2168 defined in a shared lib or is a STT_GNU_IFUNC function
2169 referenced from the code or read-only section. */
2171 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2172 h
->plt
.refcount
+= 1;
2174 if (r_type
== R_386_PC32
)
2176 /* Since something like ".long foo - ." may be used
2177 as pointer, make sure that PLT is used if foo is
2178 a function defined in a shared library. */
2179 if ((sec
->flags
& SEC_CODE
) == 0)
2180 h
->pointer_equality_needed
= 1;
2181 else if (h
->type
== STT_GNU_IFUNC
2182 && bfd_link_pic (info
))
2185 name
= h
->root
.root
.string
;
2187 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2190 /* xgettext:c-format */
2191 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2193 bfd_set_error (bfd_error_bad_value
);
2199 h
->pointer_equality_needed
= 1;
2200 /* R_386_32 can be resolved at run-time. */
2201 if (r_type
== R_386_32
2202 && (sec
->flags
& SEC_READONLY
) == 0)
2203 eh
->func_pointer_refcount
+= 1;
2209 /* If we are creating a shared library, and this is a reloc
2210 against a global symbol, or a non PC relative reloc
2211 against a local symbol, then we need to copy the reloc
2212 into the shared library. However, if we are linking with
2213 -Bsymbolic, we do not need to copy a reloc against a
2214 global symbol which is defined in an object we are
2215 including in the link (i.e., DEF_REGULAR is set). At
2216 this point we have not seen all the input files, so it is
2217 possible that DEF_REGULAR is not set now but will be set
2218 later (it is never cleared). In case of a weak definition,
2219 DEF_REGULAR may be cleared later by a strong definition in
2220 a shared library. We account for that possibility below by
2221 storing information in the relocs_copied field of the hash
2222 table entry. A similar situation occurs when creating
2223 shared libraries and symbol visibility changes render the
2226 If on the other hand, we are creating an executable, we
2227 may need to keep relocations for symbols satisfied by a
2228 dynamic library if we manage to avoid copy relocs for the
2231 Generate dynamic pointer relocation against STT_GNU_IFUNC
2232 symbol in the non-code section. */
2233 if ((bfd_link_pic (info
)
2234 && (r_type
!= R_386_PC32
2236 && (! (bfd_link_pie (info
)
2237 || SYMBOLIC_BIND (info
, h
))
2238 || h
->root
.type
== bfd_link_hash_defweak
2239 || !h
->def_regular
))))
2241 && h
->type
== STT_GNU_IFUNC
2242 && r_type
== R_386_32
2243 && (sec
->flags
& SEC_CODE
) == 0)
2244 || (ELIMINATE_COPY_RELOCS
2245 && !bfd_link_pic (info
)
2247 && (h
->root
.type
== bfd_link_hash_defweak
2248 || !h
->def_regular
)))
2250 struct elf_dyn_relocs
*p
;
2251 struct elf_dyn_relocs
**head
;
2253 /* We must copy these reloc types into the output file.
2254 Create a reloc section in dynobj and make room for
2258 sreloc
= _bfd_elf_make_dynamic_reloc_section
2259 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
2265 /* If this is a global symbol, we count the number of
2266 relocations we need for this symbol. */
2269 head
= &eh
->dyn_relocs
;
2273 /* Track dynamic relocs needed for local syms too.
2274 We really need local syms available to do this
2279 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2284 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2288 vpp
= &elf_section_data (s
)->local_dynrel
;
2289 head
= (struct elf_dyn_relocs
**)vpp
;
2293 if (p
== NULL
|| p
->sec
!= sec
)
2295 bfd_size_type amt
= sizeof *p
;
2296 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
2308 /* Count size relocation as PC-relative relocation. */
2309 if (r_type
== R_386_PC32
|| size_reloc
)
2314 /* This relocation describes the C++ object vtable hierarchy.
2315 Reconstruct it for later use during GC. */
2316 case R_386_GNU_VTINHERIT
:
2317 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2321 /* This relocation describes which C++ vtable entries are actually
2322 used. Record for later use during GC. */
2323 case R_386_GNU_VTENTRY
:
2324 BFD_ASSERT (h
!= NULL
);
2326 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2334 if (r_type
== R_386_GOT32X
2335 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2336 sec
->need_convert_load
= 1;
2339 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2341 if (!info
->keep_memory
)
2345 /* Cache the section contents for elf_link_input_bfd. */
2346 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2353 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2355 sec
->check_relocs_failed
= 1;
2359 /* Return the section that should be marked against GC for a given
2363 elf_i386_gc_mark_hook (asection
*sec
,
2364 struct bfd_link_info
*info
,
2365 Elf_Internal_Rela
*rel
,
2366 struct elf_link_hash_entry
*h
,
2367 Elf_Internal_Sym
*sym
)
2370 switch (ELF32_R_TYPE (rel
->r_info
))
2372 case R_386_GNU_VTINHERIT
:
2373 case R_386_GNU_VTENTRY
:
2377 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2380 /* Remove undefined weak symbol from the dynamic symbol table if it
2381 is resolved to 0. */
2384 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2385 struct elf_link_hash_entry
*h
)
2387 if (h
->dynindx
!= -1
2388 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2389 elf_i386_hash_entry (h
)->has_got_reloc
,
2390 elf_i386_hash_entry (h
)))
2393 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2399 /* Adjust a symbol defined by a dynamic object and referenced by a
2400 regular object. The current definition is in some section of the
2401 dynamic object, but we're not including those sections. We have to
2402 change the definition to something the rest of the link can
2406 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2407 struct elf_link_hash_entry
*h
)
2409 struct elf_i386_link_hash_table
*htab
;
2411 struct elf_i386_link_hash_entry
*eh
;
2412 struct elf_dyn_relocs
*p
;
2414 /* STT_GNU_IFUNC symbol must go through PLT. */
2415 if (h
->type
== STT_GNU_IFUNC
)
2417 /* All local STT_GNU_IFUNC references must be treate as local
2418 calls via local PLT. */
2420 && SYMBOL_CALLS_LOCAL (info
, h
))
2422 bfd_size_type pc_count
= 0, count
= 0;
2423 struct elf_dyn_relocs
**pp
;
2425 eh
= (struct elf_i386_link_hash_entry
*) h
;
2426 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2428 pc_count
+= p
->pc_count
;
2429 p
->count
-= p
->pc_count
;
2438 if (pc_count
|| count
)
2443 /* Increment PLT reference count only for PC-relative
2446 if (h
->plt
.refcount
<= 0)
2447 h
->plt
.refcount
= 1;
2449 h
->plt
.refcount
+= 1;
2454 if (h
->plt
.refcount
<= 0)
2456 h
->plt
.offset
= (bfd_vma
) -1;
2462 /* If this is a function, put it in the procedure linkage table. We
2463 will fill in the contents of the procedure linkage table later,
2464 when we know the address of the .got section. */
2465 if (h
->type
== STT_FUNC
2468 if (h
->plt
.refcount
<= 0
2469 || SYMBOL_CALLS_LOCAL (info
, h
)
2470 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2471 && h
->root
.type
== bfd_link_hash_undefweak
))
2473 /* This case can occur if we saw a PLT32 reloc in an input
2474 file, but the symbol was never referred to by a dynamic
2475 object, or if all references were garbage collected. In
2476 such a case, we don't actually need to build a procedure
2477 linkage table, and we can just do a PC32 reloc instead. */
2478 h
->plt
.offset
= (bfd_vma
) -1;
2485 /* It's possible that we incorrectly decided a .plt reloc was
2486 needed for an R_386_PC32 reloc to a non-function sym in
2487 check_relocs. We can't decide accurately between function and
2488 non-function syms in check-relocs; Objects loaded later in
2489 the link may change h->type. So fix it now. */
2490 h
->plt
.offset
= (bfd_vma
) -1;
2492 /* If this is a weak symbol, and there is a real definition, the
2493 processor independent code will have arranged for us to see the
2494 real definition first, and we can just use the same value. */
2495 if (h
->u
.weakdef
!= NULL
)
2497 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2498 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2499 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2500 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2501 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2502 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2506 /* This is a reference to a symbol defined by a dynamic object which
2507 is not a function. */
2509 /* If we are creating a shared library, we must presume that the
2510 only references to the symbol are via the global offset table.
2511 For such cases we need not do anything here; the relocations will
2512 be handled correctly by relocate_section. */
2513 if (!bfd_link_executable (info
))
2516 /* If there are no references to this symbol that do not use the
2517 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2519 eh
= (struct elf_i386_link_hash_entry
*) h
;
2520 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2523 /* If -z nocopyreloc was given, we won't generate them either. */
2524 if (info
->nocopyreloc
)
2530 htab
= elf_i386_hash_table (info
);
2534 /* If there aren't any dynamic relocs in read-only sections nor
2535 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2536 avoid the copy reloc. This doesn't work on VxWorks, where we can
2537 not have dynamic relocations (other than copy and jump slot
2538 relocations) in an executable. */
2539 if (ELIMINATE_COPY_RELOCS
2541 && get_elf_i386_backend_data (info
->output_bfd
)->os
!= is_vxworks
)
2543 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2545 s
= p
->sec
->output_section
;
2546 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2557 /* We must allocate the symbol in our .dynbss section, which will
2558 become part of the .bss section of the executable. There will be
2559 an entry for this symbol in the .dynsym section. The dynamic
2560 object will contain position independent code, so all references
2561 from the dynamic object to this symbol will go through the global
2562 offset table. The dynamic linker will use the .dynsym entry to
2563 determine the address it must put in the global offset table, so
2564 both the dynamic object and the regular object will refer to the
2565 same memory location for the variable. */
2567 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2568 copy the initial value out of the dynamic object and into the
2569 runtime process image. */
2570 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2572 s
= htab
->elf
.sdynrelro
;
2573 srel
= htab
->elf
.sreldynrelro
;
2577 s
= htab
->elf
.sdynbss
;
2578 srel
= htab
->elf
.srelbss
;
2580 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2582 srel
->size
+= sizeof (Elf32_External_Rel
);
2586 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2589 /* Allocate space in .plt, .got and associated reloc sections for
2593 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2595 struct bfd_link_info
*info
;
2596 struct elf_i386_link_hash_table
*htab
;
2597 struct elf_i386_link_hash_entry
*eh
;
2598 struct elf_dyn_relocs
*p
;
2599 unsigned plt_entry_size
;
2600 bfd_boolean resolved_to_zero
;
2601 const struct elf_i386_backend_data
*bed
;
2603 if (h
->root
.type
== bfd_link_hash_indirect
)
2606 eh
= (struct elf_i386_link_hash_entry
*) h
;
2608 info
= (struct bfd_link_info
*) inf
;
2609 htab
= elf_i386_hash_table (info
);
2613 bed
= get_elf_i386_backend_data (info
->output_bfd
);
2615 plt_entry_size
= htab
->plt
.plt_entry_size
;
2617 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2621 /* Clear the reference count of function pointer relocations if
2622 symbol isn't a normal function. */
2623 if (h
->type
!= STT_FUNC
)
2624 eh
->func_pointer_refcount
= 0;
2626 /* We can't use the GOT PLT if pointer equality is needed since
2627 finish_dynamic_symbol won't clear symbol value and the dynamic
2628 linker won't update the GOT slot. We will get into an infinite
2629 loop at run-time. */
2630 if (htab
->plt_got
!= NULL
2631 && h
->type
!= STT_GNU_IFUNC
2632 && !h
->pointer_equality_needed
2633 && h
->plt
.refcount
> 0
2634 && h
->got
.refcount
> 0)
2636 /* Don't use the regular PLT if there are both GOT and GOTPLT
2638 h
->plt
.offset
= (bfd_vma
) -1;
2640 /* Use the GOT PLT. */
2641 eh
->plt_got
.refcount
= 1;
2644 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2645 here if it is defined and referenced in a non-shared object. */
2646 if (h
->type
== STT_GNU_IFUNC
2648 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2649 &htab
->readonly_dynrelocs_against_ifunc
,
2651 (htab
->plt
.has_plt0
*
2654 /* Don't create the PLT entry if there are only function pointer
2655 relocations which can be resolved at run-time. */
2656 else if (htab
->elf
.dynamic_sections_created
2657 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2658 || eh
->plt_got
.refcount
> 0))
2660 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2662 /* Clear the reference count of function pointer relocations
2664 eh
->func_pointer_refcount
= 0;
2666 /* Make sure this symbol is output as a dynamic symbol.
2667 Undefined weak syms won't yet be marked as dynamic. */
2668 if (h
->dynindx
== -1
2670 && !resolved_to_zero
2671 && h
->root
.type
== bfd_link_hash_undefweak
)
2673 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2677 if (bfd_link_pic (info
)
2678 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2680 asection
*s
= htab
->elf
.splt
;
2681 asection
*got_s
= htab
->plt_got
;
2683 /* If this is the first .plt entry, make room for the special
2684 first entry. The .plt section is used by prelink to undo
2685 prelinking for dynamic relocations. */
2687 s
->size
= htab
->plt
.has_plt0
* plt_entry_size
;
2690 eh
->plt_got
.offset
= got_s
->size
;
2692 h
->plt
.offset
= s
->size
;
2694 /* If this symbol is not defined in a regular file, and we are
2695 not generating a shared library, then set the symbol to this
2696 location in the .plt. This is required to make function
2697 pointers compare as equal between the normal executable and
2698 the shared library. */
2699 if (! bfd_link_pic (info
)
2704 /* We need to make a call to the entry of the GOT PLT
2705 instead of regular PLT entry. */
2706 h
->root
.u
.def
.section
= got_s
;
2707 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2711 h
->root
.u
.def
.section
= s
;
2712 h
->root
.u
.def
.value
= h
->plt
.offset
;
2716 /* Make room for this entry. */
2718 got_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2721 s
->size
+= plt_entry_size
;
2723 /* We also need to make an entry in the .got.plt section,
2724 which will be placed in the .got section by the linker
2726 htab
->elf
.sgotplt
->size
+= 4;
2728 /* There should be no PLT relocation against resolved
2729 undefined weak symbol in executable. */
2730 if (!resolved_to_zero
)
2732 /* We also need to make an entry in the .rel.plt
2734 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2735 htab
->elf
.srelplt
->reloc_count
++;
2739 if (bed
->os
== is_vxworks
&& !bfd_link_pic (info
))
2741 /* VxWorks has a second set of relocations for each PLT entry
2742 in executables. They go in a separate relocation section,
2743 which is processed by the kernel loader. */
2745 /* There are two relocations for the initial PLT entry: an
2746 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2747 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2749 if (h
->plt
.offset
== plt_entry_size
)
2750 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2752 /* There are two extra relocations for each subsequent PLT entry:
2753 an R_386_32 relocation for the GOT entry, and an R_386_32
2754 relocation for the PLT entry. */
2756 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2761 eh
->plt_got
.offset
= (bfd_vma
) -1;
2762 h
->plt
.offset
= (bfd_vma
) -1;
2768 eh
->plt_got
.offset
= (bfd_vma
) -1;
2769 h
->plt
.offset
= (bfd_vma
) -1;
2773 eh
->tlsdesc_got
= (bfd_vma
) -1;
2775 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2776 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2777 if (h
->got
.refcount
> 0
2778 && bfd_link_executable (info
)
2780 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2781 h
->got
.offset
= (bfd_vma
) -1;
2782 else if (h
->got
.refcount
> 0)
2786 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2788 /* Make sure this symbol is output as a dynamic symbol.
2789 Undefined weak syms won't yet be marked as dynamic. */
2790 if (h
->dynindx
== -1
2792 && !resolved_to_zero
2793 && h
->root
.type
== bfd_link_hash_undefweak
)
2795 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2800 if (GOT_TLS_GDESC_P (tls_type
))
2802 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2803 - elf_i386_compute_jump_table_size (htab
);
2804 htab
->elf
.sgotplt
->size
+= 8;
2805 h
->got
.offset
= (bfd_vma
) -2;
2807 if (! GOT_TLS_GDESC_P (tls_type
)
2808 || GOT_TLS_GD_P (tls_type
))
2810 h
->got
.offset
= s
->size
;
2812 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2813 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2816 dyn
= htab
->elf
.dynamic_sections_created
;
2817 /* R_386_TLS_IE_32 needs one dynamic relocation,
2818 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2819 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2820 need two), R_386_TLS_GD needs one if local symbol and two if
2821 global. No dynamic relocation against resolved undefined weak
2822 symbol in executable. */
2823 if (tls_type
== GOT_TLS_IE_BOTH
)
2824 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2825 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2826 || (tls_type
& GOT_TLS_IE
))
2827 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2828 else if (GOT_TLS_GD_P (tls_type
))
2829 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2830 else if (! GOT_TLS_GDESC_P (tls_type
)
2831 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2832 && !resolved_to_zero
)
2833 || h
->root
.type
!= bfd_link_hash_undefweak
)
2834 && (bfd_link_pic (info
)
2835 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2836 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2837 if (GOT_TLS_GDESC_P (tls_type
))
2838 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2841 h
->got
.offset
= (bfd_vma
) -1;
2843 if (eh
->dyn_relocs
== NULL
)
2846 /* In the shared -Bsymbolic case, discard space allocated for
2847 dynamic pc-relative relocs against symbols which turn out to be
2848 defined in regular objects. For the normal shared case, discard
2849 space for pc-relative relocs that have become local due to symbol
2850 visibility changes. */
2852 if (bfd_link_pic (info
))
2854 /* The only reloc that uses pc_count is R_386_PC32, which will
2855 appear on a call or on something like ".long foo - .". We
2856 want calls to protected symbols to resolve directly to the
2857 function rather than going via the plt. If people want
2858 function pointer comparisons to work as expected then they
2859 should avoid writing assembly like ".long foo - .". */
2860 if (SYMBOL_CALLS_LOCAL (info
, h
))
2862 struct elf_dyn_relocs
**pp
;
2864 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2866 p
->count
-= p
->pc_count
;
2875 if (bed
->os
== is_vxworks
)
2877 struct elf_dyn_relocs
**pp
;
2878 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2880 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2887 /* Also discard relocs on undefined weak syms with non-default
2888 visibility or in PIE. */
2889 if (eh
->dyn_relocs
!= NULL
2890 && h
->root
.type
== bfd_link_hash_undefweak
)
2892 /* Undefined weak symbol is never bound locally in shared
2894 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2895 || resolved_to_zero
)
2899 /* Keep dynamic non-GOT/non-PLT relocation so that we
2900 can branch to 0 without PLT. */
2901 struct elf_dyn_relocs
**pp
;
2903 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2904 if (p
->pc_count
== 0)
2908 /* Remove non-R_386_PC32 relocation. */
2909 p
->count
= p
->pc_count
;
2913 if (eh
->dyn_relocs
!= NULL
)
2915 /* Make sure undefined weak symbols are output
2916 as dynamic symbols in PIEs for dynamic non-GOT
2917 non-PLT reloations. */
2918 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2923 eh
->dyn_relocs
= NULL
;
2925 else if (h
->dynindx
== -1
2926 && !h
->forced_local
)
2928 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2933 else if (ELIMINATE_COPY_RELOCS
)
2935 /* For the non-shared case, discard space for relocs against
2936 symbols which turn out to need copy relocs or are not
2937 dynamic. Keep dynamic relocations for run-time function
2938 pointer initialization. */
2940 if ((!h
->non_got_ref
2941 || eh
->func_pointer_refcount
> 0
2942 || (h
->root
.type
== bfd_link_hash_undefweak
2943 && !resolved_to_zero
))
2946 || (htab
->elf
.dynamic_sections_created
2947 && (h
->root
.type
== bfd_link_hash_undefweak
2948 || h
->root
.type
== bfd_link_hash_undefined
))))
2950 /* Make sure this symbol is output as a dynamic symbol.
2951 Undefined weak syms won't yet be marked as dynamic. */
2952 if (h
->dynindx
== -1
2954 && !resolved_to_zero
2955 && h
->root
.type
== bfd_link_hash_undefweak
)
2957 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2961 /* If that succeeded, we know we'll be keeping all the
2963 if (h
->dynindx
!= -1)
2967 eh
->dyn_relocs
= NULL
;
2968 eh
->func_pointer_refcount
= 0;
2973 /* Finally, allocate space. */
2974 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2978 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2980 BFD_ASSERT (sreloc
!= NULL
);
2981 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2987 /* Allocate space in .plt, .got and associated reloc sections for
2988 local dynamic relocs. */
2991 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2993 struct elf_link_hash_entry
*h
2994 = (struct elf_link_hash_entry
*) *slot
;
2996 if (h
->type
!= STT_GNU_IFUNC
3000 || h
->root
.type
!= bfd_link_hash_defined
)
3003 return elf_i386_allocate_dynrelocs (h
, inf
);
3006 /* Find any dynamic relocs that apply to read-only sections. */
3009 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
3011 struct elf_i386_link_hash_entry
*eh
;
3012 struct elf_dyn_relocs
*p
;
3014 /* Skip local IFUNC symbols. */
3015 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3018 eh
= (struct elf_i386_link_hash_entry
*) h
;
3019 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3021 asection
*s
= p
->sec
->output_section
;
3023 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3025 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3027 info
->flags
|= DF_TEXTREL
;
3029 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3030 || info
->error_textrel
)
3031 /* xgettext:c-format */
3032 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3033 p
->sec
->owner
, h
->root
.root
.string
,
3036 /* Not an error, just cut short the traversal. */
3043 /* Convert load via the GOT slot to load immediate. */
3046 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
3047 struct bfd_link_info
*link_info
)
3049 struct elf_i386_link_hash_table
*htab
;
3050 Elf_Internal_Shdr
*symtab_hdr
;
3051 Elf_Internal_Rela
*internal_relocs
;
3052 Elf_Internal_Rela
*irel
, *irelend
;
3054 bfd_boolean changed
;
3055 bfd_signed_vma
*local_got_refcounts
;
3057 /* Don't even try to convert non-ELF outputs. */
3058 if (!is_elf_hash_table (link_info
->hash
))
3061 /* Nothing to do if there is no need or no output. */
3062 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3063 || sec
->need_convert_load
== 0
3064 || bfd_is_abs_section (sec
->output_section
))
3067 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3069 /* Load the relocations for this section. */
3070 internal_relocs
= (_bfd_elf_link_read_relocs
3071 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3072 link_info
->keep_memory
));
3073 if (internal_relocs
== NULL
)
3077 htab
= elf_i386_hash_table (link_info
);
3078 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3080 /* Get the section contents. */
3081 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3082 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3085 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3089 irelend
= internal_relocs
+ sec
->reloc_count
;
3090 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3092 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3093 unsigned int r_symndx
;
3094 struct elf_link_hash_entry
*h
;
3095 bfd_boolean converted
;
3097 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3098 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3099 if (r_type
!= R_386_GOT32X
)
3102 r_symndx
= ELF32_R_SYM (irel
->r_info
);
3103 if (r_symndx
< symtab_hdr
->sh_info
)
3104 h
= elf_i386_get_local_sym_hash (htab
, sec
->owner
,
3105 (const Elf_Internal_Rela
*) irel
,
3109 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3110 while (h
->root
.type
== bfd_link_hash_indirect
3111 || h
->root
.type
== bfd_link_hash_warning
)
3112 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3115 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3116 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3120 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
3121 irel
, h
, &converted
, link_info
))
3126 changed
= converted
;
3129 if (h
->got
.refcount
> 0)
3130 h
->got
.refcount
-= 1;
3134 if (local_got_refcounts
!= NULL
3135 && local_got_refcounts
[r_symndx
] > 0)
3136 local_got_refcounts
[r_symndx
] -= 1;
3141 if (contents
!= NULL
3142 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3144 if (!changed
&& !link_info
->keep_memory
)
3148 /* Cache the section contents for elf_link_input_bfd. */
3149 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3153 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3156 free (internal_relocs
);
3158 elf_section_data (sec
)->relocs
= internal_relocs
;
3164 if (contents
!= NULL
3165 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3167 if (internal_relocs
!= NULL
3168 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3169 free (internal_relocs
);
3173 /* Set the sizes of the dynamic sections. */
3176 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3178 struct elf_i386_link_hash_table
*htab
;
3184 htab
= elf_i386_hash_table (info
);
3187 dynobj
= htab
->elf
.dynobj
;
3191 /* Set up .got offsets for local syms, and space for local dynamic
3193 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3195 bfd_signed_vma
*local_got
;
3196 bfd_signed_vma
*end_local_got
;
3197 char *local_tls_type
;
3198 bfd_vma
*local_tlsdesc_gotent
;
3199 bfd_size_type locsymcount
;
3200 Elf_Internal_Shdr
*symtab_hdr
;
3203 if (! is_i386_elf (ibfd
))
3206 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3208 struct elf_dyn_relocs
*p
;
3210 if (!elf_i386_convert_load (ibfd
, s
, info
))
3213 for (p
= ((struct elf_dyn_relocs
*)
3214 elf_section_data (s
)->local_dynrel
);
3218 if (!bfd_is_abs_section (p
->sec
)
3219 && bfd_is_abs_section (p
->sec
->output_section
))
3221 /* Input section has been discarded, either because
3222 it is a copy of a linkonce section or due to
3223 linker script /DISCARD/, so we'll be discarding
3226 else if ((get_elf_i386_backend_data (output_bfd
)->os
3228 && strcmp (p
->sec
->output_section
->name
,
3231 /* Relocations in vxworks .tls_vars sections are
3232 handled specially by the loader. */
3234 else if (p
->count
!= 0)
3236 srel
= elf_section_data (p
->sec
)->sreloc
;
3237 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3238 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3239 && (info
->flags
& DF_TEXTREL
) == 0)
3241 info
->flags
|= DF_TEXTREL
;
3242 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3243 || info
->error_textrel
)
3244 /* xgettext:c-format */
3245 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3246 p
->sec
->owner
, p
->sec
);
3252 local_got
= elf_local_got_refcounts (ibfd
);
3256 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3257 locsymcount
= symtab_hdr
->sh_info
;
3258 end_local_got
= local_got
+ locsymcount
;
3259 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3260 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3262 srel
= htab
->elf
.srelgot
;
3263 for (; local_got
< end_local_got
;
3264 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3266 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3269 if (GOT_TLS_GDESC_P (*local_tls_type
))
3271 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3272 - elf_i386_compute_jump_table_size (htab
);
3273 htab
->elf
.sgotplt
->size
+= 8;
3274 *local_got
= (bfd_vma
) -2;
3276 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3277 || GOT_TLS_GD_P (*local_tls_type
))
3279 *local_got
= s
->size
;
3281 if (GOT_TLS_GD_P (*local_tls_type
)
3282 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3285 if (bfd_link_pic (info
)
3286 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3287 || (*local_tls_type
& GOT_TLS_IE
))
3289 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3290 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3291 else if (GOT_TLS_GD_P (*local_tls_type
)
3292 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3293 srel
->size
+= sizeof (Elf32_External_Rel
);
3294 if (GOT_TLS_GDESC_P (*local_tls_type
))
3295 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3299 *local_got
= (bfd_vma
) -1;
3303 if (htab
->tls_ldm_got
.refcount
> 0)
3305 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3307 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3308 htab
->elf
.sgot
->size
+= 8;
3309 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3312 htab
->tls_ldm_got
.offset
= -1;
3314 /* Allocate global sym .plt and .got entries, and space for global
3315 sym dynamic relocs. */
3316 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3318 /* Allocate .plt and .got entries, and space for local symbols. */
3319 htab_traverse (htab
->loc_hash_table
,
3320 elf_i386_allocate_local_dynrelocs
,
3323 /* For every jump slot reserved in the sgotplt, reloc_count is
3324 incremented. However, when we reserve space for TLS descriptors,
3325 it's not incremented, so in order to compute the space reserved
3326 for them, it suffices to multiply the reloc count by the jump
3329 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3330 so that R_386_IRELATIVE entries come last. */
3331 if (htab
->elf
.srelplt
)
3333 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3334 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3335 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3337 else if (htab
->elf
.irelplt
)
3338 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3341 if (htab
->elf
.sgotplt
)
3343 /* Don't allocate .got.plt section if there are no GOT nor PLT
3344 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3345 if ((htab
->elf
.hgot
== NULL
3346 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3347 && (htab
->elf
.sgotplt
->size
3348 == get_elf_backend_data (output_bfd
)->got_header_size
)
3349 && (htab
->elf
.splt
== NULL
3350 || htab
->elf
.splt
->size
== 0)
3351 && (htab
->elf
.sgot
== NULL
3352 || htab
->elf
.sgot
->size
== 0)
3353 && (htab
->elf
.iplt
== NULL
3354 || htab
->elf
.iplt
->size
== 0)
3355 && (htab
->elf
.igotplt
== NULL
3356 || htab
->elf
.igotplt
->size
== 0))
3357 htab
->elf
.sgotplt
->size
= 0;
3360 if (_bfd_elf_eh_frame_present (info
))
3362 if (htab
->plt_eh_frame
!= NULL
3363 && htab
->elf
.splt
!= NULL
3364 && htab
->elf
.splt
->size
!= 0
3365 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3366 htab
->plt_eh_frame
->size
= htab
->plt
.eh_frame_plt_size
;
3368 if (htab
->plt_got_eh_frame
!= NULL
3369 && htab
->plt_got
!= NULL
3370 && htab
->plt_got
->size
!= 0
3371 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3372 htab
->plt_got_eh_frame
->size
3373 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3376 /* We now have determined the sizes of the various dynamic sections.
3377 Allocate memory for them. */
3379 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3381 bfd_boolean strip_section
= TRUE
;
3383 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3386 if (s
== htab
->elf
.splt
3387 || s
== htab
->elf
.sgot
)
3389 /* Strip this section if we don't need it; see the
3391 /* We'd like to strip these sections if they aren't needed, but if
3392 we've exported dynamic symbols from them we must leave them.
3393 It's too late to tell BFD to get rid of the symbols. */
3395 if (htab
->elf
.hplt
!= NULL
)
3396 strip_section
= FALSE
;
3398 else if (s
== htab
->elf
.sgotplt
3399 || s
== htab
->elf
.iplt
3400 || s
== htab
->elf
.igotplt
3401 || s
== htab
->plt_got
3402 || s
== htab
->plt_eh_frame
3403 || s
== htab
->plt_got_eh_frame
3404 || s
== htab
->elf
.sdynbss
3405 || s
== htab
->elf
.sdynrelro
)
3407 /* Strip these too. */
3409 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3412 && s
!= htab
->elf
.srelplt
3413 && s
!= htab
->srelplt2
)
3416 /* We use the reloc_count field as a counter if we need
3417 to copy relocs into the output file. */
3422 /* It's not one of our sections, so don't allocate space. */
3428 /* If we don't need this section, strip it from the
3429 output file. This is mostly to handle .rel.bss and
3430 .rel.plt. We must create both sections in
3431 create_dynamic_sections, because they must be created
3432 before the linker maps input sections to output
3433 sections. The linker does that before
3434 adjust_dynamic_symbol is called, and it is that
3435 function which decides whether anything needs to go
3436 into these sections. */
3438 s
->flags
|= SEC_EXCLUDE
;
3442 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3445 /* Allocate memory for the section contents. We use bfd_zalloc
3446 here in case unused entries are not reclaimed before the
3447 section's contents are written out. This should not happen,
3448 but this way if it does, we get a R_386_NONE reloc instead
3450 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3451 if (s
->contents
== NULL
)
3455 if (htab
->plt_eh_frame
!= NULL
3456 && htab
->plt_eh_frame
->contents
!= NULL
)
3458 memcpy (htab
->plt_eh_frame
->contents
,
3459 htab
->plt
.eh_frame_plt
,
3460 htab
->plt_eh_frame
->size
);
3461 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3462 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3465 if (htab
->plt_got_eh_frame
!= NULL
3466 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3468 memcpy (htab
->plt_got_eh_frame
->contents
,
3469 htab
->non_lazy_plt
->eh_frame_plt
,
3470 htab
->plt_got_eh_frame
->size
);
3471 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3472 (htab
->plt_got_eh_frame
->contents
3473 + PLT_FDE_LEN_OFFSET
));
3476 if (htab
->elf
.dynamic_sections_created
)
3478 /* Add some entries to the .dynamic section. We fill in the
3479 values later, in elf_i386_finish_dynamic_sections, but we
3480 must add the entries now so that we get the correct size for
3481 the .dynamic section. The DT_DEBUG entry is filled in by the
3482 dynamic linker and used by the debugger. */
3483 #define add_dynamic_entry(TAG, VAL) \
3484 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3486 if (bfd_link_executable (info
))
3488 if (!add_dynamic_entry (DT_DEBUG
, 0))
3492 if (htab
->elf
.splt
->size
!= 0)
3494 /* DT_PLTGOT is used by prelink even if there is no PLT
3496 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3500 if (htab
->elf
.srelplt
->size
!= 0)
3502 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3503 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3504 || !add_dynamic_entry (DT_JMPREL
, 0))
3510 if (!add_dynamic_entry (DT_REL
, 0)
3511 || !add_dynamic_entry (DT_RELSZ
, 0)
3512 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3515 /* If any dynamic relocs apply to a read-only section,
3516 then we need a DT_TEXTREL entry. */
3517 if ((info
->flags
& DF_TEXTREL
) == 0)
3518 elf_link_hash_traverse (&htab
->elf
,
3519 elf_i386_readonly_dynrelocs
, info
);
3521 if ((info
->flags
& DF_TEXTREL
) != 0)
3523 if (htab
->readonly_dynrelocs_against_ifunc
)
3525 info
->callbacks
->einfo
3526 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3527 bfd_set_error (bfd_error_bad_value
);
3531 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3535 if (get_elf_i386_backend_data (output_bfd
)->os
== is_vxworks
3536 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3539 #undef add_dynamic_entry
3545 elf_i386_always_size_sections (bfd
*output_bfd
,
3546 struct bfd_link_info
*info
)
3548 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3552 struct elf_link_hash_entry
*tlsbase
;
3554 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3555 "_TLS_MODULE_BASE_",
3556 FALSE
, FALSE
, FALSE
);
3558 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3560 struct elf_i386_link_hash_table
*htab
;
3561 struct bfd_link_hash_entry
*bh
= NULL
;
3562 const struct elf_backend_data
*bed
3563 = get_elf_backend_data (output_bfd
);
3565 htab
= elf_i386_hash_table (info
);
3569 if (!(_bfd_generic_link_add_one_symbol
3570 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3571 tls_sec
, 0, NULL
, FALSE
,
3572 bed
->collect
, &bh
)))
3575 htab
->tls_module_base
= bh
;
3577 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3578 tlsbase
->def_regular
= 1;
3579 tlsbase
->other
= STV_HIDDEN
;
3580 tlsbase
->root
.linker_def
= 1;
3581 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3588 /* Set the correct type for an x86 ELF section. We do this by the
3589 section name, which is a hack, but ought to work. */
3592 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3593 Elf_Internal_Shdr
*hdr
,
3598 name
= bfd_get_section_name (abfd
, sec
);
3600 /* This is an ugly, but unfortunately necessary hack that is
3601 needed when producing EFI binaries on x86. It tells
3602 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3603 containing ELF relocation info. We need this hack in order to
3604 be able to generate ELF binaries that can be translated into
3605 EFI applications (which are essentially COFF objects). Those
3606 files contain a COFF ".reloc" section inside an ELFNN object,
3607 which would normally cause BFD to segfault because it would
3608 attempt to interpret this section as containing relocation
3609 entries for section "oc". With this hack enabled, ".reloc"
3610 will be treated as a normal data section, which will avoid the
3611 segfault. However, you won't be able to create an ELFNN binary
3612 with a section named "oc" that needs relocations, but that's
3613 the kind of ugly side-effects you get when detecting section
3614 types based on their names... In practice, this limitation is
3615 unlikely to bite. */
3616 if (strcmp (name
, ".reloc") == 0)
3617 hdr
->sh_type
= SHT_PROGBITS
;
3622 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3623 executables. Rather than setting it to the beginning of the TLS
3624 section, we have to set it to the end. This function may be called
3625 multiple times, it is idempotent. */
3628 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3630 struct elf_i386_link_hash_table
*htab
;
3631 struct bfd_link_hash_entry
*base
;
3633 if (!bfd_link_executable (info
))
3636 htab
= elf_i386_hash_table (info
);
3640 base
= htab
->tls_module_base
;
3644 base
->u
.def
.value
= htab
->elf
.tls_size
;
3647 /* Return the base VMA address which should be subtracted from real addresses
3648 when resolving @dtpoff relocation.
3649 This is PT_TLS segment p_vaddr. */
3652 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3654 /* If tls_sec is NULL, we should have signalled an error already. */
3655 if (elf_hash_table (info
)->tls_sec
== NULL
)
3657 return elf_hash_table (info
)->tls_sec
->vma
;
3660 /* Return the relocation value for @tpoff relocation
3661 if STT_TLS virtual address is ADDRESS. */
3664 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3666 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3667 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3668 bfd_vma static_tls_size
;
3670 /* If tls_sec is NULL, we should have signalled an error already. */
3671 if (htab
->tls_sec
== NULL
)
3674 /* Consider special static TLS alignment requirements. */
3675 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3676 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3679 /* Relocate an i386 ELF section. */
3682 elf_i386_relocate_section (bfd
*output_bfd
,
3683 struct bfd_link_info
*info
,
3685 asection
*input_section
,
3687 Elf_Internal_Rela
*relocs
,
3688 Elf_Internal_Sym
*local_syms
,
3689 asection
**local_sections
)
3691 struct elf_i386_link_hash_table
*htab
;
3692 Elf_Internal_Shdr
*symtab_hdr
;
3693 struct elf_link_hash_entry
**sym_hashes
;
3694 bfd_vma
*local_got_offsets
;
3695 bfd_vma
*local_tlsdesc_gotents
;
3696 Elf_Internal_Rela
*rel
;
3697 Elf_Internal_Rela
*wrel
;
3698 Elf_Internal_Rela
*relend
;
3699 bfd_boolean is_vxworks_tls
;
3700 unsigned plt_entry_size
;
3702 BFD_ASSERT (is_i386_elf (input_bfd
));
3704 /* Skip if check_relocs failed. */
3705 if (input_section
->check_relocs_failed
)
3708 htab
= elf_i386_hash_table (info
);
3711 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3712 sym_hashes
= elf_sym_hashes (input_bfd
);
3713 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3714 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3715 /* We have to handle relocations in vxworks .tls_vars sections
3716 specially, because the dynamic loader is 'weird'. */
3717 is_vxworks_tls
= ((get_elf_i386_backend_data (output_bfd
)->os
3719 && bfd_link_pic (info
)
3720 && !strcmp (input_section
->output_section
->name
,
3723 elf_i386_set_tls_module_base (info
);
3725 plt_entry_size
= htab
->plt
.plt_entry_size
;
3727 rel
= wrel
= relocs
;
3728 relend
= relocs
+ input_section
->reloc_count
;
3729 for (; rel
< relend
; wrel
++, rel
++)
3731 unsigned int r_type
;
3732 reloc_howto_type
*howto
;
3733 unsigned long r_symndx
;
3734 struct elf_link_hash_entry
*h
;
3735 struct elf_i386_link_hash_entry
*eh
;
3736 Elf_Internal_Sym
*sym
;
3738 bfd_vma off
, offplt
, plt_offset
;
3740 bfd_boolean unresolved_reloc
;
3741 bfd_reloc_status_type r
;
3745 asection
*resolved_plt
;
3746 bfd_boolean resolved_to_zero
;
3747 bfd_boolean relative_reloc
;
3749 r_type
= ELF32_R_TYPE (rel
->r_info
);
3750 if (r_type
== R_386_GNU_VTINHERIT
3751 || r_type
== R_386_GNU_VTENTRY
)
3758 if ((indx
= r_type
) >= R_386_standard
3759 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3760 >= R_386_ext
- R_386_standard
)
3761 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3762 >= R_386_ext2
- R_386_ext
))
3765 /* xgettext:c-format */
3766 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3767 input_bfd
, r_type
, input_section
);
3768 bfd_set_error (bfd_error_bad_value
);
3771 howto
= elf_howto_table
+ indx
;
3773 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3777 unresolved_reloc
= FALSE
;
3778 if (r_symndx
< symtab_hdr
->sh_info
)
3780 sym
= local_syms
+ r_symndx
;
3781 sec
= local_sections
[r_symndx
];
3782 relocation
= (sec
->output_section
->vma
3783 + sec
->output_offset
3785 st_size
= sym
->st_size
;
3787 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3788 && ((sec
->flags
& SEC_MERGE
) != 0
3789 || (bfd_link_relocatable (info
)
3790 && sec
->output_offset
!= 0)))
3793 bfd_byte
*where
= contents
+ rel
->r_offset
;
3795 switch (howto
->size
)
3798 addend
= bfd_get_8 (input_bfd
, where
);
3799 if (howto
->pc_relative
)
3801 addend
= (addend
^ 0x80) - 0x80;
3806 addend
= bfd_get_16 (input_bfd
, where
);
3807 if (howto
->pc_relative
)
3809 addend
= (addend
^ 0x8000) - 0x8000;
3814 addend
= bfd_get_32 (input_bfd
, where
);
3815 if (howto
->pc_relative
)
3817 addend
= (addend
^ 0x80000000) - 0x80000000;
3825 if (bfd_link_relocatable (info
))
3826 addend
+= sec
->output_offset
;
3829 asection
*msec
= sec
;
3830 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3832 addend
-= relocation
;
3833 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3836 switch (howto
->size
)
3839 /* FIXME: overflow checks. */
3840 if (howto
->pc_relative
)
3842 bfd_put_8 (input_bfd
, addend
, where
);
3845 if (howto
->pc_relative
)
3847 bfd_put_16 (input_bfd
, addend
, where
);
3850 if (howto
->pc_relative
)
3852 bfd_put_32 (input_bfd
, addend
, where
);
3856 else if (!bfd_link_relocatable (info
)
3857 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3859 /* Relocate against local STT_GNU_IFUNC symbol. */
3860 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3865 /* Set STT_GNU_IFUNC symbol value. */
3866 h
->root
.u
.def
.value
= sym
->st_value
;
3867 h
->root
.u
.def
.section
= sec
;
3872 bfd_boolean warned ATTRIBUTE_UNUSED
;
3873 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3875 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3876 r_symndx
, symtab_hdr
, sym_hashes
,
3878 unresolved_reloc
, warned
, ignored
);
3882 if (sec
!= NULL
&& discarded_section (sec
))
3884 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3885 contents
+ rel
->r_offset
);
3886 wrel
->r_offset
= rel
->r_offset
;
3890 /* For ld -r, remove relocations in debug sections against
3891 sections defined in discarded sections. Not done for
3892 eh_frame editing code expects to be present. */
3893 if (bfd_link_relocatable (info
)
3894 && (input_section
->flags
& SEC_DEBUGGING
))
3900 if (bfd_link_relocatable (info
))
3907 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3908 it here if it is defined in a non-shared object. */
3910 && h
->type
== STT_GNU_IFUNC
3913 asection
*plt
, *gotplt
, *base_got
;
3917 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3919 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3920 sections because such sections are not SEC_ALLOC and
3921 thus ld.so will not process them. */
3922 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
3927 /* STT_GNU_IFUNC symbol must go through PLT. */
3928 if (htab
->elf
.splt
!= NULL
)
3930 plt
= htab
->elf
.splt
;
3931 gotplt
= htab
->elf
.sgotplt
;
3935 plt
= htab
->elf
.iplt
;
3936 gotplt
= htab
->elf
.igotplt
;
3946 base_got
= htab
->elf
.sgot
;
3947 off
= h
->got
.offset
;
3949 if (base_got
== NULL
)
3952 if (off
== (bfd_vma
) -1)
3954 /* We can't use h->got.offset here to save state, or
3955 even just remember the offset, as finish_dynamic_symbol
3956 would use that as offset into .got. */
3958 if (h
->plt
.offset
== (bfd_vma
) -1)
3961 if (htab
->elf
.splt
!= NULL
)
3963 plt_index
= (h
->plt
.offset
/ plt_entry_size
3964 - htab
->plt
.has_plt0
);
3965 off
= (plt_index
+ 3) * 4;
3966 base_got
= htab
->elf
.sgotplt
;
3970 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3971 off
= plt_index
* 4;
3972 base_got
= htab
->elf
.igotplt
;
3975 if (h
->dynindx
== -1
3979 /* This references the local defitionion. We must
3980 initialize this entry in the global offset table.
3981 Since the offset must always be a multiple of 8,
3982 we use the least significant bit to record
3983 whether we have initialized it already.
3985 When doing a dynamic link, we create a .rela.got
3986 relocation entry to initialize the value. This
3987 is done in the finish_dynamic_symbol routine. */
3992 bfd_put_32 (output_bfd
, relocation
,
3993 base_got
->contents
+ off
);
4001 relocation
= (base_got
->output_section
->vma
4002 + base_got
->output_offset
+ off
4003 - gotplt
->output_section
->vma
4004 - gotplt
->output_offset
);
4006 if (rel
->r_offset
> 1
4007 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4008 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4010 if (bfd_link_pic (info
))
4011 goto disallow_got32
;
4013 /* Add the GOT base if there is no base register. */
4014 relocation
+= (gotplt
->output_section
->vma
4015 + gotplt
->output_offset
);
4017 else if (htab
->elf
.splt
== NULL
)
4019 /* Adjust for static executables. */
4020 relocation
+= gotplt
->output_offset
;
4026 if (h
->plt
.offset
== (bfd_vma
) -1)
4028 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4029 if (r_type
== R_386_32
4030 && (input_section
->flags
& SEC_CODE
) == 0)
4031 goto do_ifunc_pointer
;
4032 goto bad_ifunc_reloc
;
4035 relocation
= (plt
->output_section
->vma
4036 + plt
->output_offset
+ h
->plt
.offset
);
4042 if (h
->root
.root
.string
)
4043 name
= h
->root
.root
.string
;
4045 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4048 /* xgettext:c-format */
4049 (_("%B: relocation %s against STT_GNU_IFUNC "
4050 "symbol `%s' isn't supported"), input_bfd
,
4052 bfd_set_error (bfd_error_bad_value
);
4056 /* Generate dynamic relcoation only when there is a
4057 non-GOT reference in a shared object. */
4058 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4059 || h
->plt
.offset
== (bfd_vma
) -1)
4061 Elf_Internal_Rela outrel
;
4066 /* Need a dynamic relocation to get the real function
4068 offset
= _bfd_elf_section_offset (output_bfd
,
4072 if (offset
== (bfd_vma
) -1
4073 || offset
== (bfd_vma
) -2)
4076 outrel
.r_offset
= (input_section
->output_section
->vma
4077 + input_section
->output_offset
4080 if (h
->dynindx
== -1
4082 || bfd_link_executable (info
))
4084 /* This symbol is resolved locally. */
4085 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4086 bfd_put_32 (output_bfd
,
4087 (h
->root
.u
.def
.value
4088 + h
->root
.u
.def
.section
->output_section
->vma
4089 + h
->root
.u
.def
.section
->output_offset
),
4093 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4095 /* Dynamic relocations are stored in
4096 1. .rel.ifunc section in PIC object.
4097 2. .rel.got section in dynamic executable.
4098 3. .rel.iplt section in static executable. */
4099 if (bfd_link_pic (info
))
4100 sreloc
= htab
->elf
.irelifunc
;
4101 else if (htab
->elf
.splt
!= NULL
)
4102 sreloc
= htab
->elf
.srelgot
;
4104 sreloc
= htab
->elf
.irelplt
;
4105 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4107 /* If this reloc is against an external symbol, we
4108 do not want to fiddle with the addend. Otherwise,
4109 we need to include the symbol value so that it
4110 becomes an addend for the dynamic reloc. For an
4111 internal symbol, we have updated addend. */
4120 relocation
-= (gotplt
->output_section
->vma
4121 + gotplt
->output_offset
);
4126 eh
= (struct elf_i386_link_hash_entry
*) h
;
4127 resolved_to_zero
= (eh
!= NULL
4128 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4135 /* Avoid optimizing _DYNAMIC since ld.so may use its
4136 link-time address. */
4137 if (h
== htab
->elf
.hdynamic
)
4140 if (bfd_link_pic (info
))
4142 /* It is OK to convert mov to lea and convert indirect
4143 branch to direct branch. It is OK to convert adc,
4144 add, and, cmp, or, sbb, sub, test, xor only when PIC
4146 unsigned int opcode
, addend
;
4147 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4150 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4151 if (opcode
!= 0x8b && opcode
!= 0xff)
4155 /* Resolve "mov GOT[(%reg)], %reg",
4156 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4157 and "binop foo@GOT[(%reg)], %reg". */
4159 || (h
->plt
.offset
== (bfd_vma
) -1
4160 && h
->got
.offset
== (bfd_vma
) -1)
4161 || htab
->elf
.sgotplt
== NULL
)
4164 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4165 + htab
->elf
.sgotplt
->output_offset
);
4167 /* It is relative to .got.plt section. */
4168 if (h
->got
.offset
!= (bfd_vma
) -1)
4169 /* Use GOT entry. Mask off the least significant bit in
4170 GOT offset which may be set by R_386_GOT32 processing
4172 relocation
= (htab
->elf
.sgot
->output_section
->vma
4173 + htab
->elf
.sgot
->output_offset
4174 + (h
->got
.offset
& ~1) - offplt
);
4176 /* Use GOTPLT entry. */
4177 relocation
= (h
->plt
.offset
/ plt_entry_size
4178 - htab
->plt
.has_plt0
+ 3) * 4;
4180 if (!bfd_link_pic (info
))
4182 /* If not PIC, add the .got.plt section address for
4183 baseless addressing. */
4185 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4186 if ((modrm
& 0xc7) == 0x5)
4187 relocation
+= offplt
;
4190 unresolved_reloc
= FALSE
;
4195 /* Relocation is to the entry for this symbol in the global
4197 if (htab
->elf
.sgot
== NULL
)
4200 relative_reloc
= FALSE
;
4205 off
= h
->got
.offset
;
4206 dyn
= htab
->elf
.dynamic_sections_created
;
4207 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4208 bfd_link_pic (info
),
4210 || (bfd_link_pic (info
)
4211 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4212 || (ELF_ST_VISIBILITY (h
->other
)
4213 && h
->root
.type
== bfd_link_hash_undefweak
))
4215 /* This is actually a static link, or it is a
4216 -Bsymbolic link and the symbol is defined
4217 locally, or the symbol was forced to be local
4218 because of a version file. We must initialize
4219 this entry in the global offset table. Since the
4220 offset must always be a multiple of 4, we use the
4221 least significant bit to record whether we have
4222 initialized it already.
4224 When doing a dynamic link, we create a .rel.got
4225 relocation entry to initialize the value. This
4226 is done in the finish_dynamic_symbol routine. */
4231 bfd_put_32 (output_bfd
, relocation
,
4232 htab
->elf
.sgot
->contents
+ off
);
4235 if (h
->dynindx
== -1
4237 && h
->root
.type
!= bfd_link_hash_undefweak
4238 && bfd_link_pic (info
))
4240 /* PR ld/21402: If this symbol isn't dynamic
4241 in PIC, generate R_386_RELATIVE here. */
4242 eh
->no_finish_dynamic_symbol
= 1;
4243 relative_reloc
= TRUE
;
4248 unresolved_reloc
= FALSE
;
4252 if (local_got_offsets
== NULL
)
4255 off
= local_got_offsets
[r_symndx
];
4257 /* The offset must always be a multiple of 4. We use
4258 the least significant bit to record whether we have
4259 already generated the necessary reloc. */
4264 bfd_put_32 (output_bfd
, relocation
,
4265 htab
->elf
.sgot
->contents
+ off
);
4266 local_got_offsets
[r_symndx
] |= 1;
4268 if (bfd_link_pic (info
))
4269 relative_reloc
= TRUE
;
4276 Elf_Internal_Rela outrel
;
4278 s
= htab
->elf
.srelgot
;
4282 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4283 + htab
->elf
.sgot
->output_offset
4285 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4286 elf_append_rel (output_bfd
, s
, &outrel
);
4289 if (off
>= (bfd_vma
) -2)
4292 relocation
= (htab
->elf
.sgot
->output_section
->vma
4293 + htab
->elf
.sgot
->output_offset
+ off
);
4294 if (rel
->r_offset
> 1
4295 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4296 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4298 if (bfd_link_pic (info
))
4300 /* For PIC, disallow R_386_GOT32 without a base
4301 register, except for "lea foo@GOT, %reg", since
4302 we don't know what the GOT base is. */
4306 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
4307 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4310 name
= h
->root
.root
.string
;
4313 /* xgettext:c-format */
4314 (_("%B: direct GOT relocation %s against `%s'"
4315 " without base register can not be used"
4316 " when making a shared object"),
4317 input_bfd
, howto
->name
, name
);
4318 bfd_set_error (bfd_error_bad_value
);
4324 /* Subtract the .got.plt section address only with a base
4326 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
4327 + htab
->elf
.sgotplt
->output_offset
);
4333 /* Relocation is relative to the start of the global offset
4336 /* Check to make sure it isn't a protected function or data
4337 symbol for shared library since it may not be local when
4338 used as function address or with copy relocation. We also
4339 need to make sure that a symbol is referenced locally. */
4340 if (!bfd_link_executable (info
) && h
)
4342 if (!h
->def_regular
)
4346 switch (ELF_ST_VISIBILITY (h
->other
))
4349 v
= _("hidden symbol");
4352 v
= _("internal symbol");
4355 v
= _("protected symbol");
4363 /* xgettext:c-format */
4364 (_("%B: relocation R_386_GOTOFF against undefined %s"
4365 " `%s' can not be used when making a shared object"),
4366 input_bfd
, v
, h
->root
.root
.string
);
4367 bfd_set_error (bfd_error_bad_value
);
4370 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4371 && (h
->type
== STT_FUNC
4372 || h
->type
== STT_OBJECT
)
4373 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4376 /* xgettext:c-format */
4377 (_("%B: relocation R_386_GOTOFF against protected %s"
4378 " `%s' can not be used when making a shared object"),
4380 h
->type
== STT_FUNC
? "function" : "data",
4381 h
->root
.root
.string
);
4382 bfd_set_error (bfd_error_bad_value
);
4387 /* Note that sgot is not involved in this
4388 calculation. We always want the start of .got.plt. If we
4389 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4390 permitted by the ABI, we might have to change this
4392 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4393 + htab
->elf
.sgotplt
->output_offset
;
4397 /* Use global offset table as symbol value. */
4398 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4399 + htab
->elf
.sgotplt
->output_offset
;
4400 unresolved_reloc
= FALSE
;
4404 /* Relocation is to the entry for this symbol in the
4405 procedure linkage table. */
4407 /* Resolve a PLT32 reloc against a local symbol directly,
4408 without using the procedure linkage table. */
4412 if ((h
->plt
.offset
== (bfd_vma
) -1
4413 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4414 || htab
->elf
.splt
== NULL
)
4416 /* We didn't make a PLT entry for this symbol. This
4417 happens when statically linking PIC code, or when
4418 using -Bsymbolic. */
4422 if (h
->plt
.offset
!= (bfd_vma
) -1)
4424 resolved_plt
= htab
->elf
.splt
;
4425 plt_offset
= h
->plt
.offset
;
4429 resolved_plt
= htab
->plt_got
;
4430 plt_offset
= eh
->plt_got
.offset
;
4433 relocation
= (resolved_plt
->output_section
->vma
4434 + resolved_plt
->output_offset
4436 unresolved_reloc
= FALSE
;
4440 /* Set to symbol size. */
4441 relocation
= st_size
;
4446 if ((input_section
->flags
& SEC_ALLOC
) == 0
4450 /* Copy dynamic function pointer relocations. Don't generate
4451 dynamic relocations against resolved undefined weak symbols
4452 in PIE, except for R_386_PC32. */
4453 if ((bfd_link_pic (info
)
4455 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4456 && (!resolved_to_zero
4457 || r_type
== R_386_PC32
))
4458 || h
->root
.type
!= bfd_link_hash_undefweak
))
4459 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4460 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4461 || (ELIMINATE_COPY_RELOCS
4462 && !bfd_link_pic (info
)
4466 || eh
->func_pointer_refcount
> 0
4467 || (h
->root
.type
== bfd_link_hash_undefweak
4468 && !resolved_to_zero
))
4469 && ((h
->def_dynamic
&& !h
->def_regular
)
4470 /* Undefined weak symbol is bound locally when
4472 || h
->root
.type
== bfd_link_hash_undefweak
)))
4474 Elf_Internal_Rela outrel
;
4475 bfd_boolean skip
, relocate
;
4478 /* When generating a shared object, these relocations
4479 are copied into the output file to be resolved at run
4486 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4488 if (outrel
.r_offset
== (bfd_vma
) -1)
4490 else if (outrel
.r_offset
== (bfd_vma
) -2)
4491 skip
= TRUE
, relocate
= TRUE
;
4492 outrel
.r_offset
+= (input_section
->output_section
->vma
4493 + input_section
->output_offset
);
4496 memset (&outrel
, 0, sizeof outrel
);
4499 && (r_type
== R_386_PC32
4500 || !(bfd_link_executable (info
)
4501 || SYMBOLIC_BIND (info
, h
))
4502 || !h
->def_regular
))
4503 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4506 /* This symbol is local, or marked to become local. */
4508 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4511 sreloc
= elf_section_data (input_section
)->sreloc
;
4513 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4515 r
= bfd_reloc_notsupported
;
4516 goto check_relocation_error
;
4519 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4521 /* If this reloc is against an external symbol, we do
4522 not want to fiddle with the addend. Otherwise, we
4523 need to include the symbol value so that it becomes
4524 an addend for the dynamic reloc. */
4531 if (!bfd_link_executable (info
))
4533 Elf_Internal_Rela outrel
;
4536 outrel
.r_offset
= rel
->r_offset
4537 + input_section
->output_section
->vma
4538 + input_section
->output_offset
;
4539 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4540 sreloc
= elf_section_data (input_section
)->sreloc
;
4543 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4548 case R_386_TLS_GOTDESC
:
4549 case R_386_TLS_DESC_CALL
:
4550 case R_386_TLS_IE_32
:
4551 case R_386_TLS_GOTIE
:
4552 tls_type
= GOT_UNKNOWN
;
4553 if (h
== NULL
&& local_got_offsets
)
4554 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4556 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4557 if (tls_type
== GOT_TLS_IE
)
4558 tls_type
= GOT_TLS_IE_NEG
;
4560 if (! elf_i386_tls_transition (info
, input_bfd
,
4561 input_section
, contents
,
4562 symtab_hdr
, sym_hashes
,
4563 &r_type
, tls_type
, rel
,
4564 relend
, h
, r_symndx
, TRUE
))
4567 if (r_type
== R_386_TLS_LE_32
)
4569 BFD_ASSERT (! unresolved_reloc
);
4570 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4575 /* GD->LE transition. */
4576 type
= *(contents
+ rel
->r_offset
- 2);
4580 leal foo@tlsgd(,%ebx,1), %eax
4581 call ___tls_get_addr@PLT
4584 subl $foo@tpoff, %eax
4585 (6 byte form of subl). */
4586 roff
= rel
->r_offset
+ 5;
4591 leal foo@tlsgd(%ebx), %eax
4592 call ___tls_get_addr@PLT
4595 leal foo@tlsgd(%reg), %eax
4596 call *___tls_get_addr@GOT(%reg)
4597 which may be converted to
4598 addr32 call ___tls_get_addr
4600 movl %gs:0, %eax; subl $foo@tpoff, %eax
4601 (6 byte form of subl). */
4602 roff
= rel
->r_offset
+ 6;
4604 memcpy (contents
+ roff
- 8,
4605 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4606 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4608 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4613 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4615 /* GDesc -> LE transition.
4616 It's originally something like:
4617 leal x@tlsdesc(%ebx), %eax
4621 Registers other than %eax may be set up here. */
4626 roff
= rel
->r_offset
;
4627 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4629 /* Now modify the instruction as appropriate. */
4630 /* aoliva FIXME: remove the above and xor the byte
4632 bfd_put_8 (output_bfd
, val
^ 0x86,
4633 contents
+ roff
- 1);
4634 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4638 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4640 /* GDesc -> LE transition.
4648 roff
= rel
->r_offset
;
4649 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4650 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4653 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4657 /* IE->LE transition:
4658 Originally it can be one of:
4666 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4669 /* movl foo, %eax. */
4670 bfd_put_8 (output_bfd
, 0xb8,
4671 contents
+ rel
->r_offset
- 1);
4677 type
= bfd_get_8 (input_bfd
,
4678 contents
+ rel
->r_offset
- 2);
4683 bfd_put_8 (output_bfd
, 0xc7,
4684 contents
+ rel
->r_offset
- 2);
4685 bfd_put_8 (output_bfd
,
4686 0xc0 | ((val
>> 3) & 7),
4687 contents
+ rel
->r_offset
- 1);
4691 bfd_put_8 (output_bfd
, 0x81,
4692 contents
+ rel
->r_offset
- 2);
4693 bfd_put_8 (output_bfd
,
4694 0xc0 | ((val
>> 3) & 7),
4695 contents
+ rel
->r_offset
- 1);
4702 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4703 contents
+ rel
->r_offset
);
4708 unsigned int val
, type
;
4710 /* {IE_32,GOTIE}->LE transition:
4711 Originally it can be one of:
4712 subl foo(%reg1), %reg2
4713 movl foo(%reg1), %reg2
4714 addl foo(%reg1), %reg2
4717 movl $foo, %reg2 (6 byte form)
4718 addl $foo, %reg2. */
4719 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4720 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4724 bfd_put_8 (output_bfd
, 0xc7,
4725 contents
+ rel
->r_offset
- 2);
4726 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4727 contents
+ rel
->r_offset
- 1);
4729 else if (type
== 0x2b)
4732 bfd_put_8 (output_bfd
, 0x81,
4733 contents
+ rel
->r_offset
- 2);
4734 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4735 contents
+ rel
->r_offset
- 1);
4737 else if (type
== 0x03)
4740 bfd_put_8 (output_bfd
, 0x81,
4741 contents
+ rel
->r_offset
- 2);
4742 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4743 contents
+ rel
->r_offset
- 1);
4747 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4748 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4749 contents
+ rel
->r_offset
);
4751 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4752 contents
+ rel
->r_offset
);
4757 if (htab
->elf
.sgot
== NULL
)
4762 off
= h
->got
.offset
;
4763 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4767 if (local_got_offsets
== NULL
)
4770 off
= local_got_offsets
[r_symndx
];
4771 offplt
= local_tlsdesc_gotents
[r_symndx
];
4778 Elf_Internal_Rela outrel
;
4782 if (htab
->elf
.srelgot
== NULL
)
4785 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4787 if (GOT_TLS_GDESC_P (tls_type
))
4790 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4791 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4792 <= htab
->elf
.sgotplt
->size
);
4793 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4794 + htab
->elf
.sgotplt
->output_offset
4796 + htab
->sgotplt_jump_table_size
);
4797 sreloc
= htab
->elf
.srelplt
;
4798 loc
= sreloc
->contents
;
4799 loc
+= (htab
->next_tls_desc_index
++
4800 * sizeof (Elf32_External_Rel
));
4801 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4802 <= sreloc
->contents
+ sreloc
->size
);
4803 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4806 BFD_ASSERT (! unresolved_reloc
);
4807 bfd_put_32 (output_bfd
,
4808 relocation
- elf_i386_dtpoff_base (info
),
4809 htab
->elf
.sgotplt
->contents
+ offplt
4810 + htab
->sgotplt_jump_table_size
+ 4);
4814 bfd_put_32 (output_bfd
, 0,
4815 htab
->elf
.sgotplt
->contents
+ offplt
4816 + htab
->sgotplt_jump_table_size
+ 4);
4820 sreloc
= htab
->elf
.srelgot
;
4822 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4823 + htab
->elf
.sgot
->output_offset
+ off
);
4825 if (GOT_TLS_GD_P (tls_type
))
4826 dr_type
= R_386_TLS_DTPMOD32
;
4827 else if (GOT_TLS_GDESC_P (tls_type
))
4829 else if (tls_type
== GOT_TLS_IE_POS
)
4830 dr_type
= R_386_TLS_TPOFF
;
4832 dr_type
= R_386_TLS_TPOFF32
;
4834 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4835 bfd_put_32 (output_bfd
,
4836 relocation
- elf_i386_dtpoff_base (info
),
4837 htab
->elf
.sgot
->contents
+ off
);
4838 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4839 bfd_put_32 (output_bfd
,
4840 elf_i386_dtpoff_base (info
) - relocation
,
4841 htab
->elf
.sgot
->contents
+ off
);
4842 else if (dr_type
!= R_386_TLS_DESC
)
4843 bfd_put_32 (output_bfd
, 0,
4844 htab
->elf
.sgot
->contents
+ off
);
4845 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4847 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4849 if (GOT_TLS_GD_P (tls_type
))
4853 BFD_ASSERT (! unresolved_reloc
);
4854 bfd_put_32 (output_bfd
,
4855 relocation
- elf_i386_dtpoff_base (info
),
4856 htab
->elf
.sgot
->contents
+ off
+ 4);
4860 bfd_put_32 (output_bfd
, 0,
4861 htab
->elf
.sgot
->contents
+ off
+ 4);
4862 outrel
.r_info
= ELF32_R_INFO (indx
,
4863 R_386_TLS_DTPOFF32
);
4864 outrel
.r_offset
+= 4;
4865 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4868 else if (tls_type
== GOT_TLS_IE_BOTH
)
4870 bfd_put_32 (output_bfd
,
4872 ? relocation
- elf_i386_dtpoff_base (info
)
4874 htab
->elf
.sgot
->contents
+ off
+ 4);
4875 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4876 outrel
.r_offset
+= 4;
4877 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4884 local_got_offsets
[r_symndx
] |= 1;
4887 if (off
>= (bfd_vma
) -2
4888 && ! GOT_TLS_GDESC_P (tls_type
))
4890 if (r_type
== R_386_TLS_GOTDESC
4891 || r_type
== R_386_TLS_DESC_CALL
)
4893 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4894 unresolved_reloc
= FALSE
;
4896 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4898 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4899 + htab
->elf
.sgotplt
->output_offset
;
4900 relocation
= htab
->elf
.sgot
->output_section
->vma
4901 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4902 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4903 && tls_type
== GOT_TLS_IE_BOTH
)
4905 if (r_type
== R_386_TLS_IE
)
4906 relocation
+= g_o_t
;
4907 unresolved_reloc
= FALSE
;
4909 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4911 unsigned int val
, type
;
4914 /* GD->IE transition. */
4915 type
= *(contents
+ rel
->r_offset
- 2);
4916 val
= *(contents
+ rel
->r_offset
- 1);
4920 leal foo@tlsgd(,%ebx,1), %eax
4921 call ___tls_get_addr@PLT
4924 subl $foo@gottpoff(%ebx), %eax. */
4926 roff
= rel
->r_offset
- 3;
4931 leal foo@tlsgd(%ebx), %eax
4932 call ___tls_get_addr@PLT
4935 leal foo@tlsgd(%reg), %eax
4936 call *___tls_get_addr@GOT(%reg)
4937 which may be converted to
4938 addr32 call ___tls_get_addr
4941 subl $foo@gottpoff(%reg), %eax. */
4942 roff
= rel
->r_offset
- 2;
4944 memcpy (contents
+ roff
,
4945 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4946 contents
[roff
+ 7] = 0x80 | (val
& 7);
4947 /* If foo is used only with foo@gotntpoff(%reg) and
4948 foo@indntpoff, but not with foo@gottpoff(%reg), change
4949 subl $foo@gottpoff(%reg), %eax
4951 addl $foo@gotntpoff(%reg), %eax. */
4952 if (tls_type
== GOT_TLS_IE_POS
)
4953 contents
[roff
+ 6] = 0x03;
4954 bfd_put_32 (output_bfd
,
4955 htab
->elf
.sgot
->output_section
->vma
4956 + htab
->elf
.sgot
->output_offset
+ off
4957 - htab
->elf
.sgotplt
->output_section
->vma
4958 - htab
->elf
.sgotplt
->output_offset
,
4959 contents
+ roff
+ 8);
4960 /* Skip R_386_PLT32 and R_386_GOT32X. */
4965 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4967 /* GDesc -> IE transition.
4968 It's originally something like:
4969 leal x@tlsdesc(%ebx), %eax
4972 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4974 movl x@gottpoff(%ebx), %eax # before negl %eax
4976 Registers other than %eax may be set up here. */
4980 /* First, make sure it's a leal adding ebx to a 32-bit
4981 offset into any register, although it's probably
4982 almost always going to be eax. */
4983 roff
= rel
->r_offset
;
4985 /* Now modify the instruction as appropriate. */
4986 /* To turn a leal into a movl in the form we use it, it
4987 suffices to change the first byte from 0x8d to 0x8b.
4988 aoliva FIXME: should we decide to keep the leal, all
4989 we have to do is remove the statement below, and
4990 adjust the relaxation of R_386_TLS_DESC_CALL. */
4991 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4993 if (tls_type
== GOT_TLS_IE_BOTH
)
4996 bfd_put_32 (output_bfd
,
4997 htab
->elf
.sgot
->output_section
->vma
4998 + htab
->elf
.sgot
->output_offset
+ off
4999 - htab
->elf
.sgotplt
->output_section
->vma
5000 - htab
->elf
.sgotplt
->output_offset
,
5004 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
5006 /* GDesc -> IE transition.
5014 depending on how we transformed the TLS_GOTDESC above.
5019 roff
= rel
->r_offset
;
5021 /* Now modify the instruction as appropriate. */
5022 if (tls_type
!= GOT_TLS_IE_NEG
)
5025 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5026 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5031 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
5032 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
5042 if (! elf_i386_tls_transition (info
, input_bfd
,
5043 input_section
, contents
,
5044 symtab_hdr
, sym_hashes
,
5045 &r_type
, GOT_UNKNOWN
, rel
,
5046 relend
, h
, r_symndx
, TRUE
))
5049 if (r_type
!= R_386_TLS_LDM
)
5051 /* LD->LE transition. Change
5052 leal foo@tlsldm(%ebx) %eax
5053 call ___tls_get_addr@PLT
5057 leal 0(%esi,1), %esi
5059 leal foo@tlsldm(%reg) %eax
5060 call *___tls_get_addr@GOT(%reg)
5061 which may be converted to
5062 addr32 call ___tls_get_addr
5065 leal 0(%esi), %esi */
5066 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
5067 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
5068 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
5069 memcpy (contents
+ rel
->r_offset
- 2,
5070 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5072 memcpy (contents
+ rel
->r_offset
- 2,
5073 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5074 /* Skip R_386_PC32/R_386_PLT32. */
5080 if (htab
->elf
.sgot
== NULL
)
5083 off
= htab
->tls_ldm_got
.offset
;
5088 Elf_Internal_Rela outrel
;
5090 if (htab
->elf
.srelgot
== NULL
)
5093 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5094 + htab
->elf
.sgot
->output_offset
+ off
);
5096 bfd_put_32 (output_bfd
, 0,
5097 htab
->elf
.sgot
->contents
+ off
);
5098 bfd_put_32 (output_bfd
, 0,
5099 htab
->elf
.sgot
->contents
+ off
+ 4);
5100 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5101 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5102 htab
->tls_ldm_got
.offset
|= 1;
5104 relocation
= htab
->elf
.sgot
->output_section
->vma
5105 + htab
->elf
.sgot
->output_offset
+ off
5106 - htab
->elf
.sgotplt
->output_section
->vma
5107 - htab
->elf
.sgotplt
->output_offset
;
5108 unresolved_reloc
= FALSE
;
5111 case R_386_TLS_LDO_32
:
5112 if (!bfd_link_executable (info
)
5113 || (input_section
->flags
& SEC_CODE
) == 0)
5114 relocation
-= elf_i386_dtpoff_base (info
);
5116 /* When converting LDO to LE, we must negate. */
5117 relocation
= -elf_i386_tpoff (info
, relocation
);
5120 case R_386_TLS_LE_32
:
5122 if (!bfd_link_executable (info
))
5124 Elf_Internal_Rela outrel
;
5127 outrel
.r_offset
= rel
->r_offset
5128 + input_section
->output_section
->vma
5129 + input_section
->output_offset
;
5130 if (h
!= NULL
&& h
->dynindx
!= -1)
5134 if (r_type
== R_386_TLS_LE_32
)
5135 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5137 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5138 sreloc
= elf_section_data (input_section
)->sreloc
;
5141 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5144 else if (r_type
== R_386_TLS_LE_32
)
5145 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5147 relocation
-= elf_i386_dtpoff_base (info
);
5149 else if (r_type
== R_386_TLS_LE_32
)
5150 relocation
= elf_i386_tpoff (info
, relocation
);
5152 relocation
= -elf_i386_tpoff (info
, relocation
);
5159 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5160 because such sections are not SEC_ALLOC and thus ld.so will
5161 not process them. */
5162 if (unresolved_reloc
5163 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5165 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5166 rel
->r_offset
) != (bfd_vma
) -1)
5169 /* xgettext:c-format */
5170 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5173 (long) rel
->r_offset
,
5175 h
->root
.root
.string
);
5180 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5181 contents
, rel
->r_offset
,
5184 check_relocation_error
:
5185 if (r
!= bfd_reloc_ok
)
5190 name
= h
->root
.root
.string
;
5193 name
= bfd_elf_string_from_elf_section (input_bfd
,
5194 symtab_hdr
->sh_link
,
5199 name
= bfd_section_name (input_bfd
, sec
);
5202 if (r
== bfd_reloc_overflow
)
5203 (*info
->callbacks
->reloc_overflow
)
5204 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5205 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5209 /* xgettext:c-format */
5210 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5211 input_bfd
, input_section
,
5212 (long) rel
->r_offset
, name
, (int) r
);
5223 Elf_Internal_Shdr
*rel_hdr
;
5224 size_t deleted
= rel
- wrel
;
5226 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5227 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5228 if (rel_hdr
->sh_size
== 0)
5230 /* It is too late to remove an empty reloc section. Leave
5232 ??? What is wrong with an empty section??? */
5233 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5236 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5237 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5238 input_section
->reloc_count
-= deleted
;
5244 /* Finish up dynamic symbol handling. We set the contents of various
5245 dynamic sections here. */
5248 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5249 struct bfd_link_info
*info
,
5250 struct elf_link_hash_entry
*h
,
5251 Elf_Internal_Sym
*sym
)
5253 struct elf_i386_link_hash_table
*htab
;
5254 unsigned plt_entry_size
;
5255 const struct elf_i386_backend_data
*abed
;
5256 struct elf_i386_link_hash_entry
*eh
;
5257 bfd_boolean local_undefweak
;
5259 htab
= elf_i386_hash_table (info
);
5263 abed
= get_elf_i386_backend_data (output_bfd
);
5264 plt_entry_size
= htab
->plt
.plt_entry_size
;
5266 eh
= (struct elf_i386_link_hash_entry
*) h
;
5267 if (eh
->no_finish_dynamic_symbol
)
5270 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5271 resolved undefined weak symbols in executable so that their
5272 references have value 0 at run-time. */
5273 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5277 if (h
->plt
.offset
!= (bfd_vma
) -1)
5281 Elf_Internal_Rela rel
;
5283 asection
*plt
, *gotplt
, *relplt
;
5285 /* When building a static executable, use .iplt, .igot.plt and
5286 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5287 if (htab
->elf
.splt
!= NULL
)
5289 plt
= htab
->elf
.splt
;
5290 gotplt
= htab
->elf
.sgotplt
;
5291 relplt
= htab
->elf
.srelplt
;
5295 plt
= htab
->elf
.iplt
;
5296 gotplt
= htab
->elf
.igotplt
;
5297 relplt
= htab
->elf
.irelplt
;
5300 /* This symbol has an entry in the procedure linkage table. Set
5303 if ((h
->dynindx
== -1
5305 && !((h
->forced_local
|| bfd_link_executable (info
))
5307 && h
->type
== STT_GNU_IFUNC
))
5313 /* Get the index in the procedure linkage table which
5314 corresponds to this symbol. This is the index of this symbol
5315 in all the symbols for which we are making plt entries. The
5316 first entry in the procedure linkage table is reserved.
5318 Get the offset into the .got table of the entry that
5319 corresponds to this function. Each .got entry is 4 bytes.
5320 The first three are reserved.
5322 For static executables, we don't reserve anything. */
5324 if (plt
== htab
->elf
.splt
)
5326 got_offset
= (h
->plt
.offset
/ plt_entry_size
5327 - htab
->plt
.has_plt0
);
5328 got_offset
= (got_offset
+ 3) * 4;
5332 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5333 got_offset
= got_offset
* 4;
5336 /* Fill in the entry in the procedure linkage table and update
5338 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
5340 if (! bfd_link_pic (info
))
5342 bfd_put_32 (output_bfd
,
5343 (gotplt
->output_section
->vma
5344 + gotplt
->output_offset
5346 plt
->contents
+ h
->plt
.offset
5347 + htab
->plt
.plt_got_offset
);
5349 if (abed
->os
== is_vxworks
)
5351 int s
, k
, reloc_index
;
5353 /* Create the R_386_32 relocation referencing the GOT
5354 for this PLT entry. */
5356 /* S: Current slot number (zero-based). */
5357 s
= ((h
->plt
.offset
- htab
->plt
.plt_entry_size
)
5358 / htab
->plt
.plt_entry_size
);
5359 /* K: Number of relocations for PLTResolve. */
5360 if (bfd_link_pic (info
))
5361 k
= PLTRESOLVE_RELOCS_SHLIB
;
5363 k
= PLTRESOLVE_RELOCS
;
5364 /* Skip the PLTresolve relocations, and the relocations for
5365 the other PLT slots. */
5366 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5367 loc
= (htab
->srelplt2
->contents
+ reloc_index
5368 * sizeof (Elf32_External_Rel
));
5370 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5371 + htab
->elf
.splt
->output_offset
5372 + h
->plt
.offset
+ 2),
5373 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5374 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5376 /* Create the R_386_32 relocation referencing the beginning of
5377 the PLT for this GOT entry. */
5378 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5379 + htab
->elf
.sgotplt
->output_offset
5381 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5382 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5383 loc
+ sizeof (Elf32_External_Rel
));
5388 bfd_put_32 (output_bfd
, got_offset
,
5389 plt
->contents
+ h
->plt
.offset
5390 + htab
->plt
.plt_got_offset
);
5393 /* Fill in the entry in the global offset table. Leave the entry
5394 as zero for undefined weak symbol in PIE. No PLT relocation
5395 against undefined weak symbol in PIE. */
5396 if (!local_undefweak
)
5398 if (htab
->plt
.has_plt0
)
5399 bfd_put_32 (output_bfd
,
5400 (plt
->output_section
->vma
5401 + plt
->output_offset
5403 + htab
->lazy_plt
->plt_lazy_offset
),
5404 gotplt
->contents
+ got_offset
);
5406 /* Fill in the entry in the .rel.plt section. */
5407 rel
.r_offset
= (gotplt
->output_section
->vma
5408 + gotplt
->output_offset
5410 if (h
->dynindx
== -1
5411 || ((bfd_link_executable (info
)
5412 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5414 && h
->type
== STT_GNU_IFUNC
))
5416 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5417 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5418 in the .got.plt section. */
5419 bfd_put_32 (output_bfd
,
5420 (h
->root
.u
.def
.value
5421 + h
->root
.u
.def
.section
->output_section
->vma
5422 + h
->root
.u
.def
.section
->output_offset
),
5423 gotplt
->contents
+ got_offset
);
5424 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5425 /* R_386_IRELATIVE comes last. */
5426 plt_index
= htab
->next_irelative_index
--;
5430 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5431 plt_index
= htab
->next_jump_slot_index
++;
5434 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5435 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5437 /* Don't fill the second and third slots in PLT entry for
5438 static executables nor without PLT0. */
5439 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
5441 bfd_put_32 (output_bfd
,
5442 plt_index
* sizeof (Elf32_External_Rel
),
5443 plt
->contents
+ h
->plt
.offset
5444 + htab
->lazy_plt
->plt_reloc_offset
);
5445 bfd_put_32 (output_bfd
,
5447 + htab
->lazy_plt
->plt_plt_offset
+ 4),
5448 (plt
->contents
+ h
->plt
.offset
5449 + htab
->lazy_plt
->plt_plt_offset
));
5453 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5455 bfd_vma got_offset
, plt_offset
;
5456 asection
*plt
, *got
, *gotplt
;
5457 const bfd_byte
*got_plt_entry
;
5459 /* Set the entry in the GOT procedure linkage table. */
5460 plt
= htab
->plt_got
;
5461 got
= htab
->elf
.sgot
;
5462 gotplt
= htab
->elf
.sgotplt
;
5463 got_offset
= h
->got
.offset
;
5465 if (got_offset
== (bfd_vma
) -1
5471 /* Fill in the entry in the GOT procedure linkage table. */
5472 if (! bfd_link_pic (info
))
5474 got_plt_entry
= htab
->non_lazy_plt
->plt_entry
;
5475 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5479 got_plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
5480 got_offset
+= (got
->output_section
->vma
5481 + got
->output_offset
5482 - gotplt
->output_section
->vma
5483 - gotplt
->output_offset
);
5486 plt_offset
= eh
->plt_got
.offset
;
5487 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5488 htab
->non_lazy_plt
->plt_entry_size
);
5489 bfd_put_32 (output_bfd
, got_offset
,
5490 (plt
->contents
+ plt_offset
5491 + htab
->non_lazy_plt
->plt_got_offset
));
5494 if (!local_undefweak
5496 && (h
->plt
.offset
!= (bfd_vma
) -1
5497 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5499 /* Mark the symbol as undefined, rather than as defined in
5500 the .plt section. Leave the value if there were any
5501 relocations where pointer equality matters (this is a clue
5502 for the dynamic linker, to make function pointer
5503 comparisons work between an application and shared
5504 library), otherwise set it to zero. If a function is only
5505 called from a binary, there is no need to slow down
5506 shared libraries because of that. */
5507 sym
->st_shndx
= SHN_UNDEF
;
5508 if (!h
->pointer_equality_needed
)
5512 /* Don't generate dynamic GOT relocation against undefined weak
5513 symbol in executable. */
5514 if (h
->got
.offset
!= (bfd_vma
) -1
5515 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5516 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5517 && !local_undefweak
)
5519 Elf_Internal_Rela rel
;
5520 asection
*relgot
= htab
->elf
.srelgot
;
5522 /* This symbol has an entry in the global offset table. Set it
5525 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5528 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5529 + htab
->elf
.sgot
->output_offset
5530 + (h
->got
.offset
& ~(bfd_vma
) 1));
5532 /* If this is a static link, or it is a -Bsymbolic link and the
5533 symbol is defined locally or was forced to be local because
5534 of a version file, we just want to emit a RELATIVE reloc.
5535 The entry in the global offset table will already have been
5536 initialized in the relocate_section function. */
5538 && h
->type
== STT_GNU_IFUNC
)
5540 if (h
->plt
.offset
== (bfd_vma
) -1)
5542 /* STT_GNU_IFUNC is referenced without PLT. */
5543 if (htab
->elf
.splt
== NULL
)
5545 /* use .rel[a].iplt section to store .got relocations
5546 in static executable. */
5547 relgot
= htab
->elf
.irelplt
;
5549 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5551 bfd_put_32 (output_bfd
,
5552 (h
->root
.u
.def
.value
5553 + h
->root
.u
.def
.section
->output_section
->vma
5554 + h
->root
.u
.def
.section
->output_offset
),
5555 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5556 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5561 else if (bfd_link_pic (info
))
5563 /* Generate R_386_GLOB_DAT. */
5570 if (!h
->pointer_equality_needed
)
5573 /* For non-shared object, we can't use .got.plt, which
5574 contains the real function addres if we need pointer
5575 equality. We load the GOT entry with the PLT entry. */
5576 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5577 bfd_put_32 (output_bfd
,
5578 (plt
->output_section
->vma
5579 + plt
->output_offset
+ h
->plt
.offset
),
5580 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5584 else if (bfd_link_pic (info
)
5585 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5587 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5588 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5592 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5594 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5595 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5596 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5599 elf_append_rel (output_bfd
, relgot
, &rel
);
5604 Elf_Internal_Rela rel
;
5607 /* This symbol needs a copy reloc. Set it up. */
5609 if (h
->dynindx
== -1
5610 || (h
->root
.type
!= bfd_link_hash_defined
5611 && h
->root
.type
!= bfd_link_hash_defweak
)
5612 || htab
->elf
.srelbss
== NULL
5613 || htab
->elf
.sreldynrelro
== NULL
)
5616 rel
.r_offset
= (h
->root
.u
.def
.value
5617 + h
->root
.u
.def
.section
->output_section
->vma
5618 + h
->root
.u
.def
.section
->output_offset
);
5619 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5620 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5621 s
= htab
->elf
.sreldynrelro
;
5623 s
= htab
->elf
.srelbss
;
5624 elf_append_rel (output_bfd
, s
, &rel
);
5630 /* Finish up local dynamic symbol handling. We set the contents of
5631 various dynamic sections here. */
5634 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5636 struct elf_link_hash_entry
*h
5637 = (struct elf_link_hash_entry
*) *slot
;
5638 struct bfd_link_info
*info
5639 = (struct bfd_link_info
*) inf
;
5641 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5645 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5646 here since undefined weak symbol may not be dynamic and may not be
5647 called for elf_i386_finish_dynamic_symbol. */
5650 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5653 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5654 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5656 if (h
->root
.type
!= bfd_link_hash_undefweak
5657 || h
->dynindx
!= -1)
5660 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5664 /* Used to decide how to sort relocs in an optimal manner for the
5665 dynamic linker, before writing them out. */
5667 static enum elf_reloc_type_class
5668 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5669 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5670 const Elf_Internal_Rela
*rela
)
5672 bfd
*abfd
= info
->output_bfd
;
5673 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5674 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5676 if (htab
->dynsym
!= NULL
5677 && htab
->dynsym
->contents
!= NULL
)
5679 /* Check relocation against STT_GNU_IFUNC symbol if there are
5681 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5682 if (r_symndx
!= STN_UNDEF
)
5684 Elf_Internal_Sym sym
;
5685 if (!bed
->s
->swap_symbol_in (abfd
,
5686 (htab
->dynsym
->contents
5687 + r_symndx
* sizeof (Elf32_External_Sym
)),
5691 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5692 return reloc_class_ifunc
;
5696 switch (ELF32_R_TYPE (rela
->r_info
))
5698 case R_386_IRELATIVE
:
5699 return reloc_class_ifunc
;
5700 case R_386_RELATIVE
:
5701 return reloc_class_relative
;
5702 case R_386_JUMP_SLOT
:
5703 return reloc_class_plt
;
5705 return reloc_class_copy
;
5707 return reloc_class_normal
;
5711 /* Finish up the dynamic sections. */
5714 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5715 struct bfd_link_info
*info
)
5717 struct elf_i386_link_hash_table
*htab
;
5720 const struct elf_i386_backend_data
*abed
;
5722 htab
= elf_i386_hash_table (info
);
5726 dynobj
= htab
->elf
.dynobj
;
5727 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5728 abed
= get_elf_i386_backend_data (output_bfd
);
5730 if (htab
->elf
.dynamic_sections_created
)
5732 Elf32_External_Dyn
*dyncon
, *dynconend
;
5734 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5737 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5738 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5739 for (; dyncon
< dynconend
; dyncon
++)
5741 Elf_Internal_Dyn dyn
;
5744 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5749 if (abed
->os
== is_vxworks
5750 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5755 s
= htab
->elf
.sgotplt
;
5756 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5760 s
= htab
->elf
.srelplt
;
5761 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5765 s
= htab
->elf
.srelplt
;
5766 dyn
.d_un
.d_val
= s
->size
;
5770 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5773 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5775 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5776 really seem like the right value. */
5777 elf_section_data (htab
->elf
.splt
->output_section
)
5778 ->this_hdr
.sh_entsize
= 4;
5780 if (htab
->plt
.has_plt0
)
5782 /* Fill in the special first entry in the procedure linkage
5784 memcpy (htab
->elf
.splt
->contents
, htab
->plt
.plt0_entry
,
5785 htab
->lazy_plt
->plt0_entry_size
);
5786 memset (htab
->elf
.splt
->contents
+ htab
->lazy_plt
->plt0_entry_size
,
5787 abed
->plt0_pad_byte
,
5788 htab
->plt
.plt_entry_size
- htab
->lazy_plt
->plt0_entry_size
);
5789 if (!bfd_link_pic (info
))
5791 bfd_put_32 (output_bfd
,
5792 (htab
->elf
.sgotplt
->output_section
->vma
5793 + htab
->elf
.sgotplt
->output_offset
5795 htab
->elf
.splt
->contents
5796 + htab
->lazy_plt
->plt0_got1_offset
);
5797 bfd_put_32 (output_bfd
,
5798 (htab
->elf
.sgotplt
->output_section
->vma
5799 + htab
->elf
.sgotplt
->output_offset
5801 htab
->elf
.splt
->contents
5802 + htab
->lazy_plt
->plt0_got2_offset
);
5804 if (abed
->os
== is_vxworks
)
5806 Elf_Internal_Rela rel
;
5807 int num_plts
= (htab
->elf
.splt
->size
5808 / htab
->plt
.plt_entry_size
) - 1;
5811 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5812 + 4. On IA32 we use REL relocations so the
5813 addend goes in the PLT directly. */
5814 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5815 + htab
->elf
.splt
->output_offset
5816 + htab
->lazy_plt
->plt0_got1_offset
);
5817 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
5819 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5820 htab
->srelplt2
->contents
);
5821 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
5823 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5824 + htab
->elf
.splt
->output_offset
5825 + htab
->lazy_plt
->plt0_got2_offset
);
5826 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
5828 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5829 htab
->srelplt2
->contents
+
5830 sizeof (Elf32_External_Rel
));
5831 /* Correct the .rel.plt.unloaded relocations. */
5832 p
= htab
->srelplt2
->contents
;
5833 if (bfd_link_pic (info
))
5834 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5836 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5838 for (; num_plts
; num_plts
--)
5840 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5841 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
5843 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5844 p
+= sizeof (Elf32_External_Rel
);
5846 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5847 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
5849 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5850 p
+= sizeof (Elf32_External_Rel
);
5857 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
5858 elf_section_data (htab
->plt_got
->output_section
)
5859 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
5862 /* Fill in the first three entries in the global offset table. */
5863 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
5865 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5868 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5872 bfd_put_32 (output_bfd
,
5874 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5875 htab
->elf
.sgotplt
->contents
);
5876 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5877 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5879 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5882 /* Adjust .eh_frame for .plt section. */
5883 if (htab
->plt_eh_frame
!= NULL
5884 && htab
->plt_eh_frame
->contents
!= NULL
)
5886 if (htab
->elf
.splt
!= NULL
5887 && htab
->elf
.splt
->size
!= 0
5888 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5889 && htab
->elf
.splt
->output_section
!= NULL
5890 && htab
->plt_eh_frame
->output_section
!= NULL
)
5892 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5893 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5894 + htab
->plt_eh_frame
->output_offset
5895 + PLT_FDE_START_OFFSET
;
5896 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5897 htab
->plt_eh_frame
->contents
5898 + PLT_FDE_START_OFFSET
);
5900 if (htab
->plt_eh_frame
->sec_info_type
5901 == SEC_INFO_TYPE_EH_FRAME
)
5903 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5905 htab
->plt_eh_frame
->contents
))
5910 /* Adjust .eh_frame for .plt.got section. */
5911 if (htab
->plt_got_eh_frame
!= NULL
5912 && htab
->plt_got_eh_frame
->contents
!= NULL
)
5914 if (htab
->plt_got
!= NULL
5915 && htab
->plt_got
->size
!= 0
5916 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
5917 && htab
->plt_got
->output_section
!= NULL
5918 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
5920 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
5921 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
5922 + htab
->plt_got_eh_frame
->output_offset
5923 + PLT_FDE_START_OFFSET
;
5924 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5925 htab
->plt_got_eh_frame
->contents
5926 + PLT_FDE_START_OFFSET
);
5928 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
5930 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5931 htab
->plt_got_eh_frame
,
5932 htab
->plt_got_eh_frame
->contents
))
5937 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5938 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5940 /* Fill PLT entries for undefined weak symbols in PIE. */
5941 if (bfd_link_pie (info
))
5942 bfd_hash_traverse (&info
->hash
->table
,
5943 elf_i386_pie_finish_undefweak_symbol
,
5949 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5950 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5951 It has to be done before elf_link_sort_relocs is called so that
5952 dynamic relocations are properly sorted. */
5955 elf_i386_output_arch_local_syms
5956 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
5957 struct bfd_link_info
*info
,
5958 void *flaginfo ATTRIBUTE_UNUSED
,
5959 int (*func
) (void *, const char *,
5962 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
5964 struct elf_i386_link_hash_table
*htab
= elf_i386_hash_table (info
);
5968 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5969 htab_traverse (htab
->loc_hash_table
,
5970 elf_i386_finish_local_dynamic_symbol
,
5976 /* Sort relocs into address order. */
5979 compare_relocs (const void *ap
, const void *bp
)
5981 const arelent
*a
= * (const arelent
**) ap
;
5982 const arelent
*b
= * (const arelent
**) bp
;
5984 if (a
->address
> b
->address
)
5986 else if (a
->address
< b
->address
)
5992 enum elf_i386_plt_type
6005 enum elf_i386_plt_type type
;
6006 unsigned int plt_got_offset
;
6007 unsigned int plt_entry_size
;
6011 /* Forward declaration. */
6012 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt
;
6014 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6015 dynamic relocations. */
6018 elf_i386_get_synthetic_symtab (bfd
*abfd
,
6019 long symcount ATTRIBUTE_UNUSED
,
6020 asymbol
**syms ATTRIBUTE_UNUSED
,
6025 long size
, count
, i
, n
;
6027 unsigned int plt_got_offset
, plt_entry_size
;
6029 bfd_byte
*plt_contents
;
6030 long dynrelcount
, relsize
;
6031 arelent
**dynrelbuf
;
6032 const struct elf_i386_lazy_plt_layout
*lazy_plt
;
6033 const struct elf_i386_non_lazy_plt_layout
*non_lazy_plt
;
6037 enum elf_i386_plt_type plt_type
;
6038 struct elf_i386_plt plts
[] =
6040 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0 },
6041 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0 },
6042 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0 }
6047 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
6050 if (dynsymcount
<= 0)
6053 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
6057 dynrelbuf
= (arelent
**) bfd_malloc (relsize
);
6058 if (dynrelbuf
== NULL
)
6061 dynrelcount
= bfd_canonicalize_dynamic_reloc (abfd
, dynrelbuf
,
6064 /* Sort the relocs by address. */
6065 qsort (dynrelbuf
, dynrelcount
, sizeof (arelent
*), compare_relocs
);
6067 non_lazy_plt
= NULL
;
6068 /* Silence GCC 6. */
6070 switch (get_elf_i386_backend_data (abfd
)->os
)
6073 non_lazy_plt
= &elf_i386_non_lazy_plt
;
6076 lazy_plt
= &elf_i386_lazy_plt
;
6079 lazy_plt
= &elf_i386_nacl_plt
;
6086 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6088 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
6092 /* Get the PLT section contents. */
6093 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6094 if (plt_contents
== NULL
)
6096 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6097 plt_contents
, 0, plt
->size
))
6099 free (plt_contents
);
6103 /* Check what kind of PLT it is. */
6104 plt_type
= plt_unknown
;
6105 if (plts
[j
].type
== plt_unknown
)
6107 /* Match lazy PLT first. */
6108 if (memcmp (plt_contents
, lazy_plt
->plt0_entry
,
6109 lazy_plt
->plt0_got1_offset
) == 0)
6110 plt_type
= plt_lazy
;
6111 else if (memcmp (plt_contents
, lazy_plt
->pic_plt0_entry
,
6112 lazy_plt
->plt0_got1_offset
) == 0)
6113 plt_type
= plt_lazy
| plt_pic
;
6116 if (non_lazy_plt
!= NULL
6117 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
))
6119 /* Match non-lazy PLT. */
6120 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
6121 non_lazy_plt
->plt_got_offset
) == 0)
6122 plt_type
= plt_non_lazy
;
6123 else if (memcmp (plt_contents
, non_lazy_plt
->pic_plt_entry
,
6124 non_lazy_plt
->plt_got_offset
) == 0)
6128 if (plt_type
== plt_unknown
)
6132 plts
[j
].type
= plt_type
;
6134 if ((plt_type
& plt_lazy
))
6136 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
6137 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
6138 /* Skip PLT0 in lazy PLT. */
6143 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
6144 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
6148 n
= plt
->size
/ plts
[j
].plt_entry_size
;
6152 plts
[j
].contents
= plt_contents
;
6154 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
6155 if ((plt_type
& plt_pic
))
6156 got_addr
= (bfd_vma
) -1;
6159 size
= count
* sizeof (asymbol
);
6160 s
= *ret
= (asymbol
*) bfd_zmalloc (size
);
6164 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6165 if (plts
[j
].contents
!= NULL
)
6166 free (plts
[j
].contents
);
6173 /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_
6175 asection
*sec
= bfd_get_section_by_name (abfd
, ".got.plt");
6177 got_addr
= sec
->vma
;
6180 sec
= bfd_get_section_by_name (abfd
, ".got");
6182 got_addr
= sec
->vma
;
6185 if (got_addr
== (bfd_vma
) -1)
6189 /* Check for each PLT section. */
6192 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6193 if ((plt_contents
= plts
[j
].contents
) != NULL
)
6198 plt_got_offset
= plts
[j
].plt_got_offset
;
6199 plt_entry_size
= plts
[j
].plt_entry_size
;
6203 if ((plts
[j
].type
& plt_lazy
))
6205 /* Skip PLT0 in lazy PLT. */
6207 offset
= plt_entry_size
;
6215 /* Check each PLT entry against dynamic relocations. */
6216 for (; k
< plts
[j
].count
; k
++)
6223 /* Get the GOT offset, a signed 32-bit integer. */
6224 off
= H_GET_32 (abfd
, (plt_contents
+ offset
6226 got_vma
= got_addr
+ off
;
6228 /* Binary search. */
6232 while ((min
+ 1) < max
)
6236 mid
= (min
+ max
) / 2;
6238 if (got_vma
> r
->address
)
6240 else if (got_vma
< r
->address
)
6249 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6250 if (got_vma
== p
->address
6252 && (p
->howto
->type
== R_386_JUMP_SLOT
6253 || p
->howto
->type
== R_386_GLOB_DAT
6254 || p
->howto
->type
== R_386_IRELATIVE
))
6256 *s
= **p
->sym_ptr_ptr
;
6257 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6258 set. Since we are defining a symbol, ensure one
6260 if ((s
->flags
& BSF_LOCAL
) == 0)
6261 s
->flags
|= BSF_GLOBAL
;
6262 s
->flags
|= BSF_SYNTHETIC
;
6263 /* This is no longer a section symbol. */
6264 s
->flags
&= ~BSF_SECTION_SYM
;
6266 s
->the_bfd
= plt
->owner
;
6268 /* Store relocation for later use. */
6270 /* Add @plt to function name later. */
6271 size
+= strlen (s
->name
) + sizeof ("@plt");
6273 size
+= sizeof ("+0x") - 1 + 8;
6277 offset
+= plt_entry_size
;
6281 /* PLT entries with R_386_TLS_DESC relocations are skipped. */
6287 /* Allocate space for @plt suffixes. */
6288 names
= (char *) bfd_malloc (size
);
6293 for (i
= 0; i
< count
; i
++)
6295 /* Add @plt to function name. */
6296 arelent
*p
= (arelent
*) s
->udata
.p
;
6299 size
= strlen (s
->name
);
6300 memcpy (names
, s
->name
, size
);
6307 memcpy (names
, "+0x", sizeof ("+0x") - 1);
6308 names
+= sizeof ("+0x") - 1;
6309 bfd_sprintf_vma (abfd
, buf
, p
->addend
);
6310 for (a
= buf
; *a
== '0'; ++a
)
6313 memcpy (names
, a
, size
);
6316 memcpy (names
, "@plt", sizeof ("@plt"));
6317 names
+= sizeof ("@plt");
6321 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6322 if (plts
[j
].contents
!= NULL
)
6323 free (plts
[j
].contents
);
6330 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6333 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
6335 if (h
->plt
.offset
!= (bfd_vma
) -1
6337 && !h
->pointer_equality_needed
)
6340 return _bfd_elf_hash_symbol (h
);
6343 /* Parse i386 GNU properties. */
6345 static enum elf_property_kind
6346 elf_i386_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
6347 bfd_byte
*ptr
, unsigned int datasz
)
6353 case GNU_PROPERTY_X86_ISA_1_USED
:
6354 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6358 ((type
== GNU_PROPERTY_X86_ISA_1_USED
6359 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6360 : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")),
6362 return property_corrupt
;
6364 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
6365 /* Combine properties of the same type. */
6366 prop
->u
.number
|= bfd_h_get_32 (abfd
, ptr
);
6367 prop
->pr_kind
= property_number
;
6371 return property_ignored
;
6374 return property_number
;
6377 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6378 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6379 should be merged with ABFD. */
6382 elf_i386_merge_gnu_properties (bfd
*abfd ATTRIBUTE_UNUSED
,
6383 elf_property
*aprop
,
6384 elf_property
*bprop
)
6386 unsigned int number
;
6387 bfd_boolean updated
= FALSE
;
6388 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
6392 case GNU_PROPERTY_X86_ISA_1_USED
:
6393 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6394 if (aprop
!= NULL
&& bprop
!= NULL
)
6396 number
= aprop
->u
.number
;
6397 aprop
->u
.number
= number
| bprop
->u
.number
;
6398 updated
= number
!= (unsigned int) aprop
->u
.number
;
6402 /* Return TRUE if APROP is NULL to indicate that BPROP should
6403 be added to ABFD. */
6404 updated
= aprop
== NULL
;
6409 /* Never should happen. */
6416 /* Set up i386 GNU properties. Return the first relocatable ELF input
6417 with GNU properties if found. Otherwise, return NULL. */
6420 elf_i386_link_setup_gnu_properties (struct bfd_link_info
*info
)
6422 bfd_boolean normal_target
;
6423 asection
*sec
, *pltsec
;
6425 unsigned int plt_alignment
;
6426 struct elf_i386_link_hash_table
*htab
;
6427 bfd
*pbfd
= _bfd_elf_link_setup_gnu_properties (info
);
6429 if (bfd_link_relocatable (info
))
6432 htab
= elf_i386_hash_table (info
);
6436 dynobj
= htab
->elf
.dynobj
;
6438 /* Set htab->elf.dynobj here so that there is no need to check and
6439 set it in check_relocs. */
6444 /* Find a normal input file to hold linker created
6446 for (abfd
= info
->input_bfds
;
6448 abfd
= abfd
->link
.next
)
6450 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0)
6452 htab
->elf
.dynobj
= abfd
;
6458 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
6459 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
6460 canonical function address. */
6461 htab
->plt
.has_plt0
= 1;
6462 normal_target
= FALSE
;
6464 switch (get_elf_i386_backend_data (info
->output_bfd
)->os
)
6467 htab
->lazy_plt
= &elf_i386_lazy_plt
;
6468 htab
->non_lazy_plt
= &elf_i386_non_lazy_plt
;
6469 normal_target
= TRUE
;
6472 htab
->lazy_plt
= &elf_i386_lazy_plt
;
6473 htab
->non_lazy_plt
= NULL
;
6474 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
,
6476 info
->callbacks
->einfo (_("%F: failed to create VxWorks dynamic sections\n"));
6479 htab
->lazy_plt
= &elf_i386_nacl_plt
;
6480 htab
->non_lazy_plt
= NULL
;
6484 pltsec
= htab
->elf
.splt
;
6486 /* If the non-lazy PLT is available, use it for all PLT entries if
6487 there are no PLT0 or no .plt section. */
6488 if (htab
->non_lazy_plt
!= NULL
6489 && (!htab
->plt
.has_plt0
|| pltsec
== NULL
))
6491 if (bfd_link_pic (info
))
6493 = htab
->non_lazy_plt
->pic_plt_entry
;
6496 = htab
->non_lazy_plt
->plt_entry
;
6497 htab
->plt
.plt_entry_size
6498 = htab
->non_lazy_plt
->plt_entry_size
;
6499 htab
->plt
.plt_got_offset
6500 = htab
->non_lazy_plt
->plt_got_offset
;
6501 htab
->plt
.eh_frame_plt_size
6502 = htab
->non_lazy_plt
->eh_frame_plt_size
;
6503 htab
->plt
.eh_frame_plt
6504 = htab
->non_lazy_plt
->eh_frame_plt
;
6508 if (bfd_link_pic (info
))
6510 htab
->plt
.plt0_entry
6511 = htab
->lazy_plt
->pic_plt0_entry
;
6513 = htab
->lazy_plt
->pic_plt_entry
;
6517 htab
->plt
.plt0_entry
6518 = htab
->lazy_plt
->plt0_entry
;
6520 = htab
->lazy_plt
->plt_entry
;
6522 htab
->plt
.plt_entry_size
6523 = htab
->lazy_plt
->plt_entry_size
;
6524 htab
->plt
.plt_got_offset
6525 = htab
->lazy_plt
->plt_got_offset
;
6526 htab
->plt
.eh_frame_plt_size
6527 = htab
->lazy_plt
->eh_frame_plt_size
;
6528 htab
->plt
.eh_frame_plt
6529 = htab
->lazy_plt
->eh_frame_plt
;
6532 /* Return if there are no normal input files. */
6536 /* Since create_dynamic_sections isn't always called, but GOT
6537 relocations need GOT relocations, create them here so that we
6538 don't need to do it in check_relocs. */
6539 if (htab
->elf
.sgot
== NULL
6540 && !_bfd_elf_create_got_section (dynobj
, info
))
6541 info
->callbacks
->einfo (_("%F: failed to create GOT sections\n"));
6543 /* Create the ifunc sections here so that check_relocs can be
6545 if (!_bfd_elf_create_ifunc_sections (dynobj
, info
))
6546 info
->callbacks
->einfo (_("%F: failed to create ifunc sections\n"));
6548 plt_alignment
= bfd_log2 (htab
->plt
.plt_entry_size
);
6552 /* Whe creating executable, set the contents of the .interp
6553 section to the interpreter. */
6554 if (bfd_link_executable (info
) && !info
->nointerp
)
6556 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
6559 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
6560 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
6564 /* Don't change PLT section alignment for NaCl since it uses
6565 64-byte PLT entry and sets PLT section alignment to 32
6569 const struct elf_backend_data
*bed
6570 = get_elf_backend_data (dynobj
);
6571 flagword pltflags
= (bed
->dynamic_sec_flags
6576 unsigned int non_lazy_plt_alignment
6577 = bfd_log2 (htab
->non_lazy_plt
->plt_entry_size
);
6580 if (!bfd_set_section_alignment (sec
->owner
, sec
,
6582 goto error_alignment
;
6584 /* Create the GOT procedure linkage table. */
6585 sec
= bfd_make_section_anyway_with_flags (dynobj
,
6589 info
->callbacks
->einfo (_("%F: failed to create GOT PLT section\n"));
6591 if (!bfd_set_section_alignment (dynobj
, sec
,
6592 non_lazy_plt_alignment
))
6593 goto error_alignment
;
6595 htab
->plt_got
= sec
;
6598 if (!info
->no_ld_generated_unwind_info
)
6600 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
6601 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
6602 | SEC_LINKER_CREATED
);
6604 sec
= bfd_make_section_anyway_with_flags (dynobj
,
6608 info
->callbacks
->einfo (_("%F: failed to create PLT .eh_frame section\n"));
6610 if (!bfd_set_section_alignment (dynobj
, sec
, 2))
6611 goto error_alignment
;
6613 htab
->plt_eh_frame
= sec
;
6615 if (htab
->plt_got
!= NULL
)
6617 sec
= bfd_make_section_anyway_with_flags (dynobj
,
6621 info
->callbacks
->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
6623 if (!bfd_set_section_alignment (dynobj
, sec
, 2))
6624 goto error_alignment
;
6626 htab
->plt_got_eh_frame
= sec
;
6633 /* The .iplt section is used for IFUNC symbols in static
6635 sec
= htab
->elf
.iplt
;
6637 && !bfd_set_section_alignment (sec
->owner
, sec
,
6641 info
->callbacks
->einfo (_("%F%A: failed to align section\n"),
6649 #define TARGET_LITTLE_SYM i386_elf32_vec
6650 #define TARGET_LITTLE_NAME "elf32-i386"
6651 #define ELF_ARCH bfd_arch_i386
6652 #define ELF_TARGET_ID I386_ELF_DATA
6653 #define ELF_MACHINE_CODE EM_386
6654 #define ELF_MAXPAGESIZE 0x1000
6656 #define elf_backend_can_gc_sections 1
6657 #define elf_backend_can_refcount 1
6658 #define elf_backend_want_got_plt 1
6659 #define elf_backend_plt_readonly 1
6660 #define elf_backend_want_plt_sym 0
6661 #define elf_backend_got_header_size 12
6662 #define elf_backend_plt_alignment 4
6663 #define elf_backend_dtrel_excludes_plt 1
6664 #define elf_backend_extern_protected_data 1
6665 #define elf_backend_caches_rawsize 1
6666 #define elf_backend_want_dynrelro 1
6668 /* Support RELA for objdump of prelink objects. */
6669 #define elf_info_to_howto elf_i386_info_to_howto_rel
6670 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6672 #define bfd_elf32_mkobject elf_i386_mkobject
6674 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6675 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6676 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6677 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6678 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6680 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6681 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6682 #define elf_backend_check_relocs elf_i386_check_relocs
6683 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6684 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
6685 #define elf_backend_fake_sections elf_i386_fake_sections
6686 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6687 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6688 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6689 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6690 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6691 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6692 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6693 #define elf_backend_relocate_section elf_i386_relocate_section
6694 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6695 #define elf_backend_always_size_sections elf_i386_always_size_sections
6696 #define elf_backend_omit_section_dynsym \
6697 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6698 #define elf_backend_hash_symbol elf_i386_hash_symbol
6699 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6700 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
6701 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
6702 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
6704 #include "elf32-target.h"
6706 /* FreeBSD support. */
6708 #undef TARGET_LITTLE_SYM
6709 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6710 #undef TARGET_LITTLE_NAME
6711 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6713 #define ELF_OSABI ELFOSABI_FREEBSD
6715 /* The kernel recognizes executables as valid only if they carry a
6716 "FreeBSD" label in the ELF header. So we put this label on all
6717 executables and (for simplicity) also all other object files. */
6720 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6722 _bfd_elf_post_process_headers (abfd
, info
);
6724 #ifdef OLD_FREEBSD_ABI_LABEL
6726 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6727 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
6728 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
6733 #undef elf_backend_post_process_headers
6734 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6736 #define elf32_bed elf32_i386_fbsd_bed
6738 #undef elf_backend_add_symbol_hook
6740 #include "elf32-target.h"
6744 #undef TARGET_LITTLE_SYM
6745 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6746 #undef TARGET_LITTLE_NAME
6747 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6749 #undef elf_backend_post_process_headers
6751 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6752 objects won't be recognized. */
6756 #define elf32_bed elf32_i386_sol2_bed
6758 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6760 #undef elf_backend_static_tls_alignment
6761 #define elf_backend_static_tls_alignment 8
6763 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6765 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6767 #undef elf_backend_want_plt_sym
6768 #define elf_backend_want_plt_sym 1
6770 #undef elf_backend_strtab_flags
6771 #define elf_backend_strtab_flags SHF_STRINGS
6773 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6774 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6775 FALSE otherwise. ISECTION is the best guess matching section from the
6776 input bfd IBFD, but it might be NULL. */
6779 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6780 bfd
*obfd ATTRIBUTE_UNUSED
,
6781 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6782 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6784 /* PR 19938: FIXME: Need to add code for setting the sh_info
6785 and sh_link fields of Solaris specific section types. */
6788 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6789 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6791 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6793 The following values should be set:
6796 -----------------------------------------------------------------------------
6797 SHT_SUNW_ancillary The section header index of 0
6798 [0x6fffffee] the associated string table.
6800 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6801 [0x6ffffff0] the associated symbol table. section header index of
6803 SHT_SUNW_capchain table,
6806 SHT_SUNW_symsort The section header index of 0
6807 [0x6ffffff1] the associated symbol table.
6809 SHT_SUNW_tlssort The section header index of 0
6810 [0x6ffffff2] the associated symbol table.
6812 SHT_SUNW_LDYNSYM The section header index of One greater than the
6813 [0x6ffffff3] the associated string table. symbol table index of the
6814 This index is the same string last local symbol,
6815 table used by the SHT_DYNSYM STB_LOCAL. Since
6816 section. SHT_SUNW_LDYNSYM only
6817 contains local symbols,
6818 sh_info is equivalent to
6819 the number of symbols in
6822 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6823 [0x6ffffff5] the section header index of to named strings, the
6824 the associated section header index of
6825 SHT_SUNW_capinfo table, the associated string
6826 otherwise 0. table, otherwise 0.
6828 SHT_SUNW_move The section header index of 0
6829 [0x6ffffffa] the associated symbol table.
6834 SHT_SUNW_syminfo The section header index of The section header index
6835 [0x6ffffffc] the associated symbol table. of the associated
6838 SHT_SUNW_verdef The section header index of The number of version
6839 [0x6ffffffd] the associated string table. definitions within the
6842 SHT_SUNW_verneed The section header index of The number of version
6843 [0x6ffffffe] the associated string table. dependencies within the
6846 SHT_SUNW_versym The section header index of 0
6847 [0x6fffffff] the associated symbol table. */
6850 #undef elf_backend_copy_special_section_fields
6851 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6853 #include "elf32-target.h"
6855 /* Intel MCU support. */
6858 elf32_iamcu_elf_object_p (bfd
*abfd
)
6860 /* Set the right machine number for an IAMCU elf32 file. */
6861 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
6865 #undef TARGET_LITTLE_SYM
6866 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6867 #undef TARGET_LITTLE_NAME
6868 #define TARGET_LITTLE_NAME "elf32-iamcu"
6870 #define ELF_ARCH bfd_arch_iamcu
6872 #undef ELF_MACHINE_CODE
6873 #define ELF_MACHINE_CODE EM_IAMCU
6878 #define elf32_bed elf32_iamcu_bed
6880 #undef elf_backend_object_p
6881 #define elf_backend_object_p elf32_iamcu_elf_object_p
6883 #undef elf_backend_static_tls_alignment
6885 #undef elf_backend_want_plt_sym
6886 #define elf_backend_want_plt_sym 0
6888 #undef elf_backend_strtab_flags
6889 #undef elf_backend_copy_special_section_fields
6891 #include "elf32-target.h"
6893 /* Restore defaults. */
6895 #define ELF_ARCH bfd_arch_i386
6896 #undef ELF_MACHINE_CODE
6897 #define ELF_MACHINE_CODE EM_386
6899 /* Native Client support. */
6901 #undef TARGET_LITTLE_SYM
6902 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6903 #undef TARGET_LITTLE_NAME
6904 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6906 #define elf32_bed elf32_i386_nacl_bed
6908 #undef ELF_MAXPAGESIZE
6909 #define ELF_MAXPAGESIZE 0x10000
6911 /* Restore defaults. */
6913 #undef elf_backend_want_plt_sym
6914 #define elf_backend_want_plt_sym 0
6915 #undef elf_backend_post_process_headers
6916 #undef elf_backend_static_tls_alignment
6918 /* NaCl uses substantially different PLT entries for the same effects. */
6920 #undef elf_backend_plt_alignment
6921 #define elf_backend_plt_alignment 5
6922 #define NACL_PLT_ENTRY_SIZE 64
6923 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6925 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
6927 0xff, 0x35, /* pushl contents of address */
6928 0, 0, 0, 0, /* replaced with address of .got + 4. */
6929 0x8b, 0x0d, /* movl contents of address, %ecx */
6930 0, 0, 0, 0, /* replaced with address of .got + 8. */
6931 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6932 0xff, 0xe1 /* jmp *%ecx */
6935 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6937 0x8b, 0x0d, /* movl contents of address, %ecx */
6938 0, 0, 0, 0, /* replaced with GOT slot address. */
6939 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6940 0xff, 0xe1, /* jmp *%ecx */
6942 /* Pad to the next 32-byte boundary with nop instructions. */
6944 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6945 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6947 /* Lazy GOT entries point here (32-byte aligned). */
6948 0x68, /* pushl immediate */
6949 0, 0, 0, 0, /* replaced with reloc offset. */
6950 0xe9, /* jmp relative */
6951 0, 0, 0, 0, /* replaced with offset to .plt. */
6953 /* Pad to the next 32-byte boundary with nop instructions. */
6954 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6955 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6959 static const bfd_byte
6960 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
6962 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6963 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6964 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6965 0xff, 0xe1, /* jmp *%ecx */
6967 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6968 so pad to that size with nop instructions. */
6969 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6972 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6974 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6975 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6976 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6977 0xff, 0xe1, /* jmp *%ecx */
6979 /* Pad to the next 32-byte boundary with nop instructions. */
6981 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6982 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6984 /* Lazy GOT entries point here (32-byte aligned). */
6985 0x68, /* pushl immediate */
6986 0, 0, 0, 0, /* replaced with offset into relocation table. */
6987 0xe9, /* jmp relative */
6988 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6990 /* Pad to the next 32-byte boundary with nop instructions. */
6991 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6992 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6996 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
6998 #if (PLT_CIE_LENGTH != 20 \
6999 || PLT_FDE_LENGTH != 36 \
7000 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7001 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7002 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
7004 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
7005 0, 0, 0, 0, /* CIE ID */
7006 1, /* CIE version */
7007 'z', 'R', 0, /* Augmentation string */
7008 1, /* Code alignment factor */
7009 0x7c, /* Data alignment factor: -4 */
7010 8, /* Return address column */
7011 1, /* Augmentation size */
7012 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
7013 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
7014 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
7015 DW_CFA_nop
, DW_CFA_nop
,
7017 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
7018 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
7019 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
7020 0, 0, 0, 0, /* .plt size goes here */
7021 0, /* Augmentation size */
7022 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
7023 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
7024 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
7025 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
7026 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
7027 13, /* Block length */
7028 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
7029 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
7030 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
7031 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
7032 DW_CFA_nop
, DW_CFA_nop
7035 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt
=
7037 elf_i386_nacl_plt0_entry
, /* plt0_entry */
7038 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
7039 2, /* plt0_got1_offset */
7040 8, /* plt0_got2_offset */
7041 elf_i386_nacl_plt_entry
, /* plt_entry */
7042 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
7043 2, /* plt_got_offset */
7044 33, /* plt_reloc_offset */
7045 38, /* plt_plt_offset */
7046 32, /* plt_lazy_offset */
7047 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
7048 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
7049 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
7050 sizeof (elf_i386_nacl_eh_frame_plt
) /* eh_frame_plt_size */
7053 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
7055 0x90, /* plt0_pad_byte: nop insn */
7060 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
7062 /* Set the right machine number for a NaCl i386 ELF32 file. */
7063 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
7067 #undef elf_backend_arch_data
7068 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
7070 #undef elf_backend_object_p
7071 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
7072 #undef elf_backend_modify_segment_map
7073 #define elf_backend_modify_segment_map nacl_modify_segment_map
7074 #undef elf_backend_modify_program_headers
7075 #define elf_backend_modify_program_headers nacl_modify_program_headers
7076 #undef elf_backend_final_write_processing
7077 #define elf_backend_final_write_processing nacl_final_write_processing
7079 #include "elf32-target.h"
7081 /* Restore defaults. */
7082 #undef elf_backend_object_p
7083 #undef elf_backend_modify_segment_map
7084 #undef elf_backend_modify_program_headers
7085 #undef elf_backend_final_write_processing
7087 /* VxWorks support. */
7089 #undef TARGET_LITTLE_SYM
7090 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
7091 #undef TARGET_LITTLE_NAME
7092 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
7094 #undef ELF_MAXPAGESIZE
7095 #define ELF_MAXPAGESIZE 0x1000
7096 #undef elf_backend_plt_alignment
7097 #define elf_backend_plt_alignment 4
7099 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
7101 0x90, /* plt0_pad_byte */
7105 #undef elf_backend_arch_data
7106 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
7108 #undef elf_backend_relocs_compatible
7109 #undef elf_backend_add_symbol_hook
7110 #define elf_backend_add_symbol_hook \
7111 elf_vxworks_add_symbol_hook
7112 #undef elf_backend_link_output_symbol_hook
7113 #define elf_backend_link_output_symbol_hook \
7114 elf_vxworks_link_output_symbol_hook
7115 #undef elf_backend_emit_relocs
7116 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
7117 #undef elf_backend_final_write_processing
7118 #define elf_backend_final_write_processing \
7119 elf_vxworks_final_write_processing
7120 #undef elf_backend_static_tls_alignment
7122 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7124 #undef elf_backend_want_plt_sym
7125 #define elf_backend_want_plt_sym 1
7128 #define elf32_bed elf32_i386_vxworks_bed
7130 #include "elf32-target.h"