1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2014 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"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table
[]=
40 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
41 bfd_elf_generic_reloc
, "R_386_NONE",
42 TRUE
, 0x00000000, 0x00000000, FALSE
),
43 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_32",
45 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
46 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_PC32",
48 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
49 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_GOT32",
51 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
52 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_PLT32",
54 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
55 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_COPY",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_RELATIVE",
66 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
67 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_386_GOTOFF",
69 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
70 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
71 bfd_elf_generic_reloc
, "R_386_GOTPC",
72 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_IE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_LE",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_TLS_GD",
96 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
97 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
99 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
100 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_16",
102 TRUE
, 0xffff, 0xffff, FALSE
),
103 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_PC16",
105 TRUE
, 0xffff, 0xffff, TRUE
),
106 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_386_8",
108 TRUE
, 0xff, 0xff, FALSE
),
109 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
110 bfd_elf_generic_reloc
, "R_386_PC8",
111 TRUE
, 0xff, 0xff, TRUE
),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
135 bfd_elf_generic_reloc
, "R_386_SIZE32",
136 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
137 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
139 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
140 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
146 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
148 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT
, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE
, /* pc_relative */
161 complain_overflow_dont
, /* complain_on_overflow */
162 NULL
, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE
, /* partial_inplace */
167 FALSE
), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY
, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE
, /* pc_relative */
176 complain_overflow_dont
, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE
, /* partial_inplace */
182 FALSE
) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type
*
196 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
197 bfd_reloc_code_real_type code
)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table
[R_386_NONE
];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table
[R_386_32
];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table
[R_386_32
];
213 case BFD_RELOC_32_PCREL
:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table
[R_386_PC32
];
217 case BFD_RELOC_386_GOT32
:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table
[R_386_GOT32
];
221 case BFD_RELOC_386_PLT32
:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table
[R_386_PLT32
];
225 case BFD_RELOC_386_COPY
:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table
[R_386_COPY
];
229 case BFD_RELOC_386_GLOB_DAT
:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table
[R_386_GLOB_DAT
];
233 case BFD_RELOC_386_JUMP_SLOT
:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table
[R_386_JUMP_SLOT
];
237 case BFD_RELOC_386_RELATIVE
:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table
[R_386_RELATIVE
];
241 case BFD_RELOC_386_GOTOFF
:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table
[R_386_GOTOFF
];
245 case BFD_RELOC_386_GOTPC
:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table
[R_386_GOTPC
];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF
:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
254 case BFD_RELOC_386_TLS_IE
:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_GOTIE
:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_LE
:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_GD
:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_LDM
:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
278 case BFD_RELOC_16_PCREL
:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
286 case BFD_RELOC_8_PCREL
:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32
:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
295 case BFD_RELOC_386_TLS_IE_32
:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_LE_32
:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_DTPMOD32
:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPOFF32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_TPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_SIZE32
:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
319 case BFD_RELOC_386_TLS_GOTDESC
:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_DESC_CALL
:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC
:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
331 case BFD_RELOC_386_IRELATIVE
:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
335 case BFD_RELOC_VTABLE_INHERIT
:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
339 case BFD_RELOC_VTABLE_ENTRY
:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
351 static reloc_howto_type
*
352 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
357 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
358 if (elf_howto_table
[i
].name
!= NULL
359 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
360 return &elf_howto_table
[i
];
365 static reloc_howto_type
*
366 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
370 if ((indx
= r_type
) >= R_386_standard
371 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
372 >= R_386_ext
- R_386_standard
)
373 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
374 >= R_386_irelative
- R_386_ext
)
375 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
376 >= R_386_vt
- R_386_irelative
))
378 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
382 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
383 return &elf_howto_table
[indx
];
387 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
389 Elf_Internal_Rela
*dst
)
391 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
392 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
395 /* Return whether a symbol name implies a local label. The UnixWare
396 2.1 cc generates temporary symbols that start with .X, so we
397 recognize them here. FIXME: do other SVR4 compilers also use .X?.
398 If so, we should move the .X recognition into
399 _bfd_elf_is_local_label_name. */
402 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
404 if (name
[0] == '.' && name
[1] == 'X')
407 return _bfd_elf_is_local_label_name (abfd
, name
);
410 /* Support for core dump NOTE sections. */
413 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
418 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
420 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
426 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
429 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
433 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
437 switch (note
->descsz
)
442 case 144: /* Linux/i386 */
444 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
447 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
457 /* Make a ".reg/999" section. */
458 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
459 size
, note
->descpos
+ offset
);
463 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
465 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
467 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
472 elf_tdata (abfd
)->core
->program
473 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
474 elf_tdata (abfd
)->core
->command
475 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
479 switch (note
->descsz
)
484 case 124: /* Linux/i386 elf_prpsinfo. */
485 elf_tdata (abfd
)->core
->pid
486 = bfd_get_32 (abfd
, note
->descdata
+ 12);
487 elf_tdata (abfd
)->core
->program
488 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
489 elf_tdata (abfd
)->core
->command
490 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
494 /* Note that for some reason, a spurious space is tacked
495 onto the end of the args in some (at least one anyway)
496 implementations, so strip it off if it exists. */
498 char *command
= elf_tdata (abfd
)->core
->command
;
499 int n
= strlen (command
);
501 if (0 < n
&& command
[n
- 1] == ' ')
502 command
[n
- 1] = '\0';
508 /* Functions for the i386 ELF linker.
510 In order to gain some understanding of code in this file without
511 knowing all the intricate details of the linker, note the
514 Functions named elf_i386_* are called by external routines, other
515 functions are only called locally. elf_i386_* functions appear
516 in this file more or less in the order in which they are called
517 from external routines. eg. elf_i386_check_relocs is called
518 early in the link process, elf_i386_finish_dynamic_sections is
519 one of the last functions. */
522 /* The name of the dynamic interpreter. This is put in the .interp
525 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
527 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
528 copying dynamic variables from a shared lib into an app's dynbss
529 section, and instead use a dynamic relocation to point into the
531 #define ELIMINATE_COPY_RELOCS 1
533 /* The size in bytes of an entry in the procedure linkage table. */
535 #define PLT_ENTRY_SIZE 16
537 /* The first entry in an absolute procedure linkage table looks like
538 this. See the SVR4 ABI i386 supplement to see how this works.
539 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
541 static const bfd_byte elf_i386_plt0_entry
[12] =
543 0xff, 0x35, /* pushl contents of address */
544 0, 0, 0, 0, /* replaced with address of .got + 4. */
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0 /* replaced with address of .got + 8. */
549 /* Subsequent entries in an absolute procedure linkage table look like
552 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
554 0xff, 0x25, /* jmp indirect */
555 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
556 0x68, /* pushl immediate */
557 0, 0, 0, 0, /* replaced with offset into relocation table. */
558 0xe9, /* jmp relative */
559 0, 0, 0, 0 /* replaced with offset to start of .plt. */
562 /* The first entry in a PIC procedure linkage table look like this.
563 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
565 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
567 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
568 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
571 /* Subsequent entries in a PIC procedure linkage table look like this. */
573 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
575 0xff, 0xa3, /* jmp *offset(%ebx) */
576 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
577 0x68, /* pushl immediate */
578 0, 0, 0, 0, /* replaced with offset into relocation table. */
579 0xe9, /* jmp relative */
580 0, 0, 0, 0 /* replaced with offset to start of .plt. */
583 /* .eh_frame covering the .plt section. */
585 static const bfd_byte elf_i386_eh_frame_plt
[] =
587 #define PLT_CIE_LENGTH 20
588 #define PLT_FDE_LENGTH 36
589 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
590 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
591 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
592 0, 0, 0, 0, /* CIE ID */
594 'z', 'R', 0, /* Augmentation string */
595 1, /* Code alignment factor */
596 0x7c, /* Data alignment factor */
597 8, /* Return address column */
598 1, /* Augmentation size */
599 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
600 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
601 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
602 DW_CFA_nop
, DW_CFA_nop
,
604 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
605 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
606 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
607 0, 0, 0, 0, /* .plt size goes here */
608 0, /* Augmentation size */
609 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
610 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
611 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
612 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
613 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
614 11, /* Block length */
615 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
616 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
617 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
618 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
619 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
622 struct elf_i386_plt_layout
624 /* The first entry in an absolute procedure linkage table looks like this. */
625 const bfd_byte
*plt0_entry
;
626 unsigned int plt0_entry_size
;
628 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
629 unsigned int plt0_got1_offset
;
630 unsigned int plt0_got2_offset
;
632 /* Later entries in an absolute procedure linkage table look like this. */
633 const bfd_byte
*plt_entry
;
634 unsigned int plt_entry_size
;
636 /* Offsets into plt_entry that are to be replaced with... */
637 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
638 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
639 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
641 /* Offset into plt_entry where the initial value of the GOT entry points. */
642 unsigned int plt_lazy_offset
;
644 /* The first entry in a PIC procedure linkage table looks like this. */
645 const bfd_byte
*pic_plt0_entry
;
647 /* Subsequent entries in a PIC procedure linkage table look like this. */
648 const bfd_byte
*pic_plt_entry
;
650 /* .eh_frame covering the .plt section. */
651 const bfd_byte
*eh_frame_plt
;
652 unsigned int eh_frame_plt_size
;
655 #define GET_PLT_ENTRY_SIZE(abfd) \
656 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
658 /* These are the standard parameters. */
659 static const struct elf_i386_plt_layout elf_i386_plt
=
661 elf_i386_plt0_entry
, /* plt0_entry */
662 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
663 2, /* plt0_got1_offset */
664 8, /* plt0_got2_offset */
665 elf_i386_plt_entry
, /* plt_entry */
666 PLT_ENTRY_SIZE
, /* plt_entry_size */
667 2, /* plt_got_offset */
668 7, /* plt_reloc_offset */
669 12, /* plt_plt_offset */
670 6, /* plt_lazy_offset */
671 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
672 elf_i386_pic_plt_entry
, /* pic_plt_entry */
673 elf_i386_eh_frame_plt
, /* eh_frame_plt */
674 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
678 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
679 for the PLTResolve stub and then for each PLT entry. */
680 #define PLTRESOLVE_RELOCS_SHLIB 0
681 #define PLTRESOLVE_RELOCS 2
682 #define PLT_NON_JUMP_SLOT_RELOCS 2
684 /* Architecture-specific backend data for i386. */
686 struct elf_i386_backend_data
688 /* Parameters describing PLT generation. */
689 const struct elf_i386_plt_layout
*plt
;
691 /* Value used to fill the unused bytes of the first PLT entry. */
692 bfd_byte plt0_pad_byte
;
694 /* True if the target system is VxWorks. */
698 #define get_elf_i386_backend_data(abfd) \
699 ((const struct elf_i386_backend_data *) \
700 get_elf_backend_data (abfd)->arch_data)
702 /* These are the standard parameters. */
703 static const struct elf_i386_backend_data elf_i386_arch_bed
=
705 &elf_i386_plt
, /* plt */
706 0, /* plt0_pad_byte */
710 #define elf_backend_arch_data &elf_i386_arch_bed
712 /* i386 ELF linker hash entry. */
714 struct elf_i386_link_hash_entry
716 struct elf_link_hash_entry elf
;
718 /* Track dynamic relocs copied for this symbol. */
719 struct elf_dyn_relocs
*dyn_relocs
;
721 #define GOT_UNKNOWN 0
725 #define GOT_TLS_IE_POS 5
726 #define GOT_TLS_IE_NEG 6
727 #define GOT_TLS_IE_BOTH 7
728 #define GOT_TLS_GDESC 8
729 #define GOT_TLS_GD_BOTH_P(type) \
730 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
731 #define GOT_TLS_GD_P(type) \
732 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
733 #define GOT_TLS_GDESC_P(type) \
734 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
735 #define GOT_TLS_GD_ANY_P(type) \
736 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
737 unsigned char tls_type
;
739 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
740 starting at the end of the jump table. */
744 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
746 struct elf_i386_obj_tdata
748 struct elf_obj_tdata root
;
750 /* tls_type for each local got entry. */
751 char *local_got_tls_type
;
753 /* GOTPLT entries for TLS descriptors. */
754 bfd_vma
*local_tlsdesc_gotent
;
757 #define elf_i386_tdata(abfd) \
758 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
760 #define elf_i386_local_got_tls_type(abfd) \
761 (elf_i386_tdata (abfd)->local_got_tls_type)
763 #define elf_i386_local_tlsdesc_gotent(abfd) \
764 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
766 #define is_i386_elf(bfd) \
767 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
768 && elf_tdata (bfd) != NULL \
769 && elf_object_id (bfd) == I386_ELF_DATA)
772 elf_i386_mkobject (bfd
*abfd
)
774 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
778 /* i386 ELF linker hash table. */
780 struct elf_i386_link_hash_table
782 struct elf_link_hash_table elf
;
784 /* Short-cuts to get to dynamic linker sections. */
787 asection
*plt_eh_frame
;
791 bfd_signed_vma refcount
;
795 /* The amount of space used by the reserved portion of the sgotplt
796 section, plus whatever space is used by the jump slots. */
797 bfd_vma sgotplt_jump_table_size
;
799 /* Small local sym cache. */
800 struct sym_cache sym_cache
;
802 /* _TLS_MODULE_BASE_ symbol. */
803 struct bfd_link_hash_entry
*tls_module_base
;
805 /* Used by local STT_GNU_IFUNC symbols. */
806 htab_t loc_hash_table
;
807 void * loc_hash_memory
;
809 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
812 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
813 bfd_vma next_tls_desc_index
;
815 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
816 bfd_vma next_jump_slot_index
;
818 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
819 bfd_vma next_irelative_index
;
822 /* Get the i386 ELF linker hash table from a link_info structure. */
824 #define elf_i386_hash_table(p) \
825 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
826 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
828 #define elf_i386_compute_jump_table_size(htab) \
829 ((htab)->elf.srelplt->reloc_count * 4)
831 /* Create an entry in an i386 ELF linker hash table. */
833 static struct bfd_hash_entry
*
834 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
835 struct bfd_hash_table
*table
,
838 /* Allocate the structure if it has not already been allocated by a
842 entry
= (struct bfd_hash_entry
*)
843 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
848 /* Call the allocation method of the superclass. */
849 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
852 struct elf_i386_link_hash_entry
*eh
;
854 eh
= (struct elf_i386_link_hash_entry
*) entry
;
855 eh
->dyn_relocs
= NULL
;
856 eh
->tls_type
= GOT_UNKNOWN
;
857 eh
->tlsdesc_got
= (bfd_vma
) -1;
863 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
864 for local symbol so that we can handle local STT_GNU_IFUNC symbols
865 as global symbol. We reuse indx and dynstr_index for local symbol
866 hash since they aren't used by global symbols in this backend. */
869 elf_i386_local_htab_hash (const void *ptr
)
871 struct elf_link_hash_entry
*h
872 = (struct elf_link_hash_entry
*) ptr
;
873 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
876 /* Compare local hash entries. */
879 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
881 struct elf_link_hash_entry
*h1
882 = (struct elf_link_hash_entry
*) ptr1
;
883 struct elf_link_hash_entry
*h2
884 = (struct elf_link_hash_entry
*) ptr2
;
886 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
889 /* Find and/or create a hash entry for local symbol. */
891 static struct elf_link_hash_entry
*
892 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
893 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
896 struct elf_i386_link_hash_entry e
, *ret
;
897 asection
*sec
= abfd
->sections
;
898 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
899 ELF32_R_SYM (rel
->r_info
));
902 e
.elf
.indx
= sec
->id
;
903 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
904 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
905 create
? INSERT
: NO_INSERT
);
912 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
916 ret
= (struct elf_i386_link_hash_entry
*)
917 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
918 sizeof (struct elf_i386_link_hash_entry
));
921 memset (ret
, 0, sizeof (*ret
));
922 ret
->elf
.indx
= sec
->id
;
923 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
924 ret
->elf
.dynindx
= -1;
930 /* Destroy an i386 ELF linker hash table. */
933 elf_i386_link_hash_table_free (bfd
*obfd
)
935 struct elf_i386_link_hash_table
*htab
936 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
938 if (htab
->loc_hash_table
)
939 htab_delete (htab
->loc_hash_table
);
940 if (htab
->loc_hash_memory
)
941 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
942 _bfd_elf_link_hash_table_free (obfd
);
945 /* Create an i386 ELF linker hash table. */
947 static struct bfd_link_hash_table
*
948 elf_i386_link_hash_table_create (bfd
*abfd
)
950 struct elf_i386_link_hash_table
*ret
;
951 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
953 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
957 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
958 elf_i386_link_hash_newfunc
,
959 sizeof (struct elf_i386_link_hash_entry
),
966 ret
->loc_hash_table
= htab_try_create (1024,
967 elf_i386_local_htab_hash
,
968 elf_i386_local_htab_eq
,
970 ret
->loc_hash_memory
= objalloc_create ();
971 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
973 elf_i386_link_hash_table_free (abfd
);
976 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
978 return &ret
->elf
.root
;
981 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
982 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
986 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
988 struct elf_i386_link_hash_table
*htab
;
990 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
993 htab
= elf_i386_hash_table (info
);
997 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
999 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rel.bss");
1002 || (!info
->shared
&& !htab
->srelbss
))
1005 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1006 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1010 if (!info
->no_ld_generated_unwind_info
1011 && htab
->plt_eh_frame
== NULL
1012 && htab
->elf
.splt
!= NULL
)
1014 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1015 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1016 | SEC_LINKER_CREATED
);
1018 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1019 if (htab
->plt_eh_frame
== NULL
1020 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1027 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1030 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1031 struct elf_link_hash_entry
*dir
,
1032 struct elf_link_hash_entry
*ind
)
1034 struct elf_i386_link_hash_entry
*edir
, *eind
;
1036 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1037 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1039 if (eind
->dyn_relocs
!= NULL
)
1041 if (edir
->dyn_relocs
!= NULL
)
1043 struct elf_dyn_relocs
**pp
;
1044 struct elf_dyn_relocs
*p
;
1046 /* Add reloc counts against the indirect sym to the direct sym
1047 list. Merge any entries against the same section. */
1048 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1050 struct elf_dyn_relocs
*q
;
1052 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1053 if (q
->sec
== p
->sec
)
1055 q
->pc_count
+= p
->pc_count
;
1056 q
->count
+= p
->count
;
1063 *pp
= edir
->dyn_relocs
;
1066 edir
->dyn_relocs
= eind
->dyn_relocs
;
1067 eind
->dyn_relocs
= NULL
;
1070 if (ind
->root
.type
== bfd_link_hash_indirect
1071 && dir
->got
.refcount
<= 0)
1073 edir
->tls_type
= eind
->tls_type
;
1074 eind
->tls_type
= GOT_UNKNOWN
;
1077 if (ELIMINATE_COPY_RELOCS
1078 && ind
->root
.type
!= bfd_link_hash_indirect
1079 && dir
->dynamic_adjusted
)
1081 /* If called to transfer flags for a weakdef during processing
1082 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1083 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1084 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1085 dir
->ref_regular
|= ind
->ref_regular
;
1086 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1087 dir
->needs_plt
|= ind
->needs_plt
;
1088 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1091 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1094 /* Return TRUE if the TLS access code sequence support transition
1098 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1100 Elf_Internal_Shdr
*symtab_hdr
,
1101 struct elf_link_hash_entry
**sym_hashes
,
1102 unsigned int r_type
,
1103 const Elf_Internal_Rela
*rel
,
1104 const Elf_Internal_Rela
*relend
)
1106 unsigned int val
, type
;
1107 unsigned long r_symndx
;
1108 struct elf_link_hash_entry
*h
;
1111 /* Get the section contents. */
1112 if (contents
== NULL
)
1114 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1115 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1118 /* FIXME: How to better handle error condition? */
1119 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1122 /* Cache the section contents for elf_link_input_bfd. */
1123 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1127 offset
= rel
->r_offset
;
1132 if (offset
< 2 || (rel
+ 1) >= relend
)
1135 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1136 if (r_type
== R_386_TLS_GD
)
1138 /* Check transition from GD access model. Only
1139 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1140 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1141 can transit to different access model. */
1142 if ((offset
+ 10) > sec
->size
||
1143 (type
!= 0x8d && type
!= 0x04))
1146 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1149 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1153 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1156 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1161 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1162 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1165 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1171 /* Check transition from LD access model. Only
1172 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1173 can transit to different access model. */
1174 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1177 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1178 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1182 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1185 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1186 if (r_symndx
< symtab_hdr
->sh_info
)
1189 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1190 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1191 may be versioned. */
1193 && h
->root
.root
.string
!= NULL
1194 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1195 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1196 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1200 /* Check transition from IE access model:
1201 movl foo@indntpoff(%rip), %eax
1202 movl foo@indntpoff(%rip), %reg
1203 addl foo@indntpoff(%rip), %reg
1206 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1209 /* Check "movl foo@tpoff(%rip), %eax" first. */
1210 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1217 /* Check movl|addl foo@tpoff(%rip), %reg. */
1218 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1219 return ((type
== 0x8b || type
== 0x03)
1220 && (val
& 0xc7) == 0x05);
1222 case R_386_TLS_GOTIE
:
1223 case R_386_TLS_IE_32
:
1224 /* Check transition from {IE_32,GOTIE} access model:
1225 subl foo@{tpoff,gontoff}(%reg1), %reg2
1226 movl foo@{tpoff,gontoff}(%reg1), %reg2
1227 addl foo@{tpoff,gontoff}(%reg1), %reg2
1230 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1233 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1234 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1237 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1238 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1240 case R_386_TLS_GOTDESC
:
1241 /* Check transition from GDesc access model:
1242 leal x@tlsdesc(%ebx), %eax
1244 Make sure it's a leal adding ebx to a 32-bit offset
1245 into any register, although it's probably almost always
1248 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1251 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1254 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1255 return (val
& 0xc7) == 0x83;
1257 case R_386_TLS_DESC_CALL
:
1258 /* Check transition from GDesc access model:
1259 call *x@tlsdesc(%rax)
1261 if (offset
+ 2 <= sec
->size
)
1263 /* Make sure that it's a call *x@tlsdesc(%rax). */
1264 static const unsigned char call
[] = { 0xff, 0x10 };
1265 return memcmp (contents
+ offset
, call
, 2) == 0;
1275 /* Return TRUE if the TLS access transition is OK or no transition
1276 will be performed. Update R_TYPE if there is a transition. */
1279 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1280 asection
*sec
, bfd_byte
*contents
,
1281 Elf_Internal_Shdr
*symtab_hdr
,
1282 struct elf_link_hash_entry
**sym_hashes
,
1283 unsigned int *r_type
, int tls_type
,
1284 const Elf_Internal_Rela
*rel
,
1285 const Elf_Internal_Rela
*relend
,
1286 struct elf_link_hash_entry
*h
,
1287 unsigned long r_symndx
)
1289 unsigned int from_type
= *r_type
;
1290 unsigned int to_type
= from_type
;
1291 bfd_boolean check
= TRUE
;
1293 /* Skip TLS transition for functions. */
1295 && (h
->type
== STT_FUNC
1296 || h
->type
== STT_GNU_IFUNC
))
1302 case R_386_TLS_GOTDESC
:
1303 case R_386_TLS_DESC_CALL
:
1304 case R_386_TLS_IE_32
:
1306 case R_386_TLS_GOTIE
:
1307 if (info
->executable
)
1310 to_type
= R_386_TLS_LE_32
;
1311 else if (from_type
!= R_386_TLS_IE
1312 && from_type
!= R_386_TLS_GOTIE
)
1313 to_type
= R_386_TLS_IE_32
;
1316 /* When we are called from elf_i386_relocate_section, CONTENTS
1317 isn't NULL and there may be additional transitions based on
1319 if (contents
!= NULL
)
1321 unsigned int new_to_type
= to_type
;
1323 if (info
->executable
1326 && (tls_type
& GOT_TLS_IE
))
1327 new_to_type
= R_386_TLS_LE_32
;
1329 if (to_type
== R_386_TLS_GD
1330 || to_type
== R_386_TLS_GOTDESC
1331 || to_type
== R_386_TLS_DESC_CALL
)
1333 if (tls_type
== GOT_TLS_IE_POS
)
1334 new_to_type
= R_386_TLS_GOTIE
;
1335 else if (tls_type
& GOT_TLS_IE
)
1336 new_to_type
= R_386_TLS_IE_32
;
1339 /* We checked the transition before when we were called from
1340 elf_i386_check_relocs. We only want to check the new
1341 transition which hasn't been checked before. */
1342 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1343 to_type
= new_to_type
;
1349 if (info
->executable
)
1350 to_type
= R_386_TLS_LE_32
;
1357 /* Return TRUE if there is no transition. */
1358 if (from_type
== to_type
)
1361 /* Check if the transition can be performed. */
1363 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1364 symtab_hdr
, sym_hashes
,
1365 from_type
, rel
, relend
))
1367 reloc_howto_type
*from
, *to
;
1370 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1371 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1374 name
= h
->root
.root
.string
;
1377 struct elf_i386_link_hash_table
*htab
;
1379 htab
= elf_i386_hash_table (info
);
1384 Elf_Internal_Sym
*isym
;
1386 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1388 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1392 (*_bfd_error_handler
)
1393 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1394 "in section `%A' failed"),
1395 abfd
, sec
, from
->name
, to
->name
, name
,
1396 (unsigned long) rel
->r_offset
);
1397 bfd_set_error (bfd_error_bad_value
);
1405 /* Look through the relocs for a section during the first phase, and
1406 calculate needed space in the global offset table, procedure linkage
1407 table, and dynamic reloc sections. */
1410 elf_i386_check_relocs (bfd
*abfd
,
1411 struct bfd_link_info
*info
,
1413 const Elf_Internal_Rela
*relocs
)
1415 struct elf_i386_link_hash_table
*htab
;
1416 Elf_Internal_Shdr
*symtab_hdr
;
1417 struct elf_link_hash_entry
**sym_hashes
;
1418 const Elf_Internal_Rela
*rel
;
1419 const Elf_Internal_Rela
*rel_end
;
1422 if (info
->relocatable
)
1425 BFD_ASSERT (is_i386_elf (abfd
));
1427 htab
= elf_i386_hash_table (info
);
1431 symtab_hdr
= &elf_symtab_hdr (abfd
);
1432 sym_hashes
= elf_sym_hashes (abfd
);
1436 rel_end
= relocs
+ sec
->reloc_count
;
1437 for (rel
= relocs
; rel
< rel_end
; rel
++)
1439 unsigned int r_type
;
1440 unsigned long r_symndx
;
1441 struct elf_link_hash_entry
*h
;
1442 Elf_Internal_Sym
*isym
;
1444 bfd_boolean size_reloc
;
1446 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1447 r_type
= ELF32_R_TYPE (rel
->r_info
);
1449 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1451 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1457 if (r_symndx
< symtab_hdr
->sh_info
)
1459 /* A local symbol. */
1460 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1465 /* Check relocation against local STT_GNU_IFUNC symbol. */
1466 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1468 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1472 /* Fake a STT_GNU_IFUNC symbol. */
1473 h
->type
= STT_GNU_IFUNC
;
1476 h
->forced_local
= 1;
1477 h
->root
.type
= bfd_link_hash_defined
;
1485 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1486 while (h
->root
.type
== bfd_link_hash_indirect
1487 || h
->root
.type
== bfd_link_hash_warning
)
1488 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1493 /* Create the ifunc sections for static executables. If we
1494 never see an indirect function symbol nor we are building
1495 a static executable, those sections will be empty and
1496 won't appear in output. */
1507 if (htab
->elf
.dynobj
== NULL
)
1508 htab
->elf
.dynobj
= abfd
;
1509 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1514 /* It is referenced by a non-shared object. */
1516 h
->root
.non_ir_ref
= 1;
1519 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1520 symtab_hdr
, sym_hashes
,
1521 &r_type
, GOT_UNKNOWN
,
1522 rel
, rel_end
, h
, r_symndx
))
1528 htab
->tls_ldm_got
.refcount
+= 1;
1532 /* This symbol requires a procedure linkage table entry. We
1533 actually build the entry in adjust_dynamic_symbol,
1534 because this might be a case of linking PIC code which is
1535 never referenced by a dynamic object, in which case we
1536 don't need to generate a procedure linkage table entry
1539 /* If this is a local symbol, we resolve it directly without
1540 creating a procedure linkage table entry. */
1545 h
->plt
.refcount
+= 1;
1552 case R_386_TLS_IE_32
:
1554 case R_386_TLS_GOTIE
:
1555 if (!info
->executable
)
1556 info
->flags
|= DF_STATIC_TLS
;
1561 case R_386_TLS_GOTDESC
:
1562 case R_386_TLS_DESC_CALL
:
1563 /* This symbol requires a global offset table entry. */
1565 int tls_type
, old_tls_type
;
1570 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1571 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1572 case R_386_TLS_GOTDESC
:
1573 case R_386_TLS_DESC_CALL
:
1574 tls_type
= GOT_TLS_GDESC
; break;
1575 case R_386_TLS_IE_32
:
1576 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1577 tls_type
= GOT_TLS_IE_NEG
;
1579 /* If this is a GD->IE transition, we may use either of
1580 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1581 tls_type
= GOT_TLS_IE
;
1584 case R_386_TLS_GOTIE
:
1585 tls_type
= GOT_TLS_IE_POS
; break;
1590 h
->got
.refcount
+= 1;
1591 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1595 bfd_signed_vma
*local_got_refcounts
;
1597 /* This is a global offset table entry for a local symbol. */
1598 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1599 if (local_got_refcounts
== NULL
)
1603 size
= symtab_hdr
->sh_info
;
1604 size
*= (sizeof (bfd_signed_vma
)
1605 + sizeof (bfd_vma
) + sizeof(char));
1606 local_got_refcounts
= (bfd_signed_vma
*)
1607 bfd_zalloc (abfd
, size
);
1608 if (local_got_refcounts
== NULL
)
1610 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1611 elf_i386_local_tlsdesc_gotent (abfd
)
1612 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1613 elf_i386_local_got_tls_type (abfd
)
1614 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1616 local_got_refcounts
[r_symndx
] += 1;
1617 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1620 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1621 tls_type
|= old_tls_type
;
1622 /* If a TLS symbol is accessed using IE at least once,
1623 there is no point to use dynamic model for it. */
1624 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1625 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1626 || (tls_type
& GOT_TLS_IE
) == 0))
1628 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1629 tls_type
= old_tls_type
;
1630 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1631 && GOT_TLS_GD_ANY_P (tls_type
))
1632 tls_type
|= old_tls_type
;
1636 name
= h
->root
.root
.string
;
1638 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1640 (*_bfd_error_handler
)
1641 (_("%B: `%s' accessed both as normal and "
1642 "thread local symbol"),
1644 bfd_set_error (bfd_error_bad_value
);
1649 if (old_tls_type
!= tls_type
)
1652 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1654 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1662 if (htab
->elf
.sgot
== NULL
)
1664 if (htab
->elf
.dynobj
== NULL
)
1665 htab
->elf
.dynobj
= abfd
;
1666 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1669 if (r_type
!= R_386_TLS_IE
)
1673 case R_386_TLS_LE_32
:
1675 if (info
->executable
)
1677 info
->flags
|= DF_STATIC_TLS
;
1682 if (h
!= NULL
&& info
->executable
)
1684 /* If this reloc is in a read-only section, we might
1685 need a copy reloc. We can't check reliably at this
1686 stage whether the section is read-only, as input
1687 sections have not yet been mapped to output sections.
1688 Tentatively set the flag for now, and correct in
1689 adjust_dynamic_symbol. */
1692 /* We may need a .plt entry if the function this reloc
1693 refers to is in a shared lib. */
1694 h
->plt
.refcount
+= 1;
1695 if (r_type
!= R_386_PC32
)
1696 h
->pointer_equality_needed
= 1;
1701 /* If we are creating a shared library, and this is a reloc
1702 against a global symbol, or a non PC relative reloc
1703 against a local symbol, then we need to copy the reloc
1704 into the shared library. However, if we are linking with
1705 -Bsymbolic, we do not need to copy a reloc against a
1706 global symbol which is defined in an object we are
1707 including in the link (i.e., DEF_REGULAR is set). At
1708 this point we have not seen all the input files, so it is
1709 possible that DEF_REGULAR is not set now but will be set
1710 later (it is never cleared). In case of a weak definition,
1711 DEF_REGULAR may be cleared later by a strong definition in
1712 a shared library. We account for that possibility below by
1713 storing information in the relocs_copied field of the hash
1714 table entry. A similar situation occurs when creating
1715 shared libraries and symbol visibility changes render the
1718 If on the other hand, we are creating an executable, we
1719 may need to keep relocations for symbols satisfied by a
1720 dynamic library if we manage to avoid copy relocs for the
1723 && (sec
->flags
& SEC_ALLOC
) != 0
1724 && (r_type
!= R_386_PC32
1726 && (! SYMBOLIC_BIND (info
, h
)
1727 || h
->root
.type
== bfd_link_hash_defweak
1728 || !h
->def_regular
))))
1729 || (ELIMINATE_COPY_RELOCS
1731 && (sec
->flags
& SEC_ALLOC
) != 0
1733 && (h
->root
.type
== bfd_link_hash_defweak
1734 || !h
->def_regular
)))
1736 struct elf_dyn_relocs
*p
;
1737 struct elf_dyn_relocs
**head
;
1739 /* We must copy these reloc types into the output file.
1740 Create a reloc section in dynobj and make room for
1744 if (htab
->elf
.dynobj
== NULL
)
1745 htab
->elf
.dynobj
= abfd
;
1747 sreloc
= _bfd_elf_make_dynamic_reloc_section
1748 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1754 /* If this is a global symbol, we count the number of
1755 relocations we need for this symbol. */
1758 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1762 /* Track dynamic relocs needed for local syms too.
1763 We really need local syms available to do this
1768 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1773 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1777 vpp
= &elf_section_data (s
)->local_dynrel
;
1778 head
= (struct elf_dyn_relocs
**)vpp
;
1782 if (p
== NULL
|| p
->sec
!= sec
)
1784 bfd_size_type amt
= sizeof *p
;
1785 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1797 /* Count size relocation as PC-relative relocation. */
1798 if (r_type
== R_386_PC32
|| size_reloc
)
1803 /* This relocation describes the C++ object vtable hierarchy.
1804 Reconstruct it for later use during GC. */
1805 case R_386_GNU_VTINHERIT
:
1806 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1810 /* This relocation describes which C++ vtable entries are actually
1811 used. Record for later use during GC. */
1812 case R_386_GNU_VTENTRY
:
1813 BFD_ASSERT (h
!= NULL
);
1815 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1827 /* Return the section that should be marked against GC for a given
1831 elf_i386_gc_mark_hook (asection
*sec
,
1832 struct bfd_link_info
*info
,
1833 Elf_Internal_Rela
*rel
,
1834 struct elf_link_hash_entry
*h
,
1835 Elf_Internal_Sym
*sym
)
1838 switch (ELF32_R_TYPE (rel
->r_info
))
1840 case R_386_GNU_VTINHERIT
:
1841 case R_386_GNU_VTENTRY
:
1845 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1848 /* Update the got entry reference counts for the section being removed. */
1851 elf_i386_gc_sweep_hook (bfd
*abfd
,
1852 struct bfd_link_info
*info
,
1854 const Elf_Internal_Rela
*relocs
)
1856 struct elf_i386_link_hash_table
*htab
;
1857 Elf_Internal_Shdr
*symtab_hdr
;
1858 struct elf_link_hash_entry
**sym_hashes
;
1859 bfd_signed_vma
*local_got_refcounts
;
1860 const Elf_Internal_Rela
*rel
, *relend
;
1862 if (info
->relocatable
)
1865 htab
= elf_i386_hash_table (info
);
1869 elf_section_data (sec
)->local_dynrel
= NULL
;
1871 symtab_hdr
= &elf_symtab_hdr (abfd
);
1872 sym_hashes
= elf_sym_hashes (abfd
);
1873 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1875 relend
= relocs
+ sec
->reloc_count
;
1876 for (rel
= relocs
; rel
< relend
; rel
++)
1878 unsigned long r_symndx
;
1879 unsigned int r_type
;
1880 struct elf_link_hash_entry
*h
= NULL
;
1882 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1883 if (r_symndx
>= symtab_hdr
->sh_info
)
1885 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1886 while (h
->root
.type
== bfd_link_hash_indirect
1887 || h
->root
.type
== bfd_link_hash_warning
)
1888 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1892 /* A local symbol. */
1893 Elf_Internal_Sym
*isym
;
1895 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1898 /* Check relocation against local STT_GNU_IFUNC symbol. */
1900 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1902 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1910 struct elf_i386_link_hash_entry
*eh
;
1911 struct elf_dyn_relocs
**pp
;
1912 struct elf_dyn_relocs
*p
;
1914 eh
= (struct elf_i386_link_hash_entry
*) h
;
1915 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1918 /* Everything must go for SEC. */
1924 r_type
= ELF32_R_TYPE (rel
->r_info
);
1925 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1926 symtab_hdr
, sym_hashes
,
1927 &r_type
, GOT_UNKNOWN
,
1928 rel
, relend
, h
, r_symndx
))
1934 if (htab
->tls_ldm_got
.refcount
> 0)
1935 htab
->tls_ldm_got
.refcount
-= 1;
1939 case R_386_TLS_GOTDESC
:
1940 case R_386_TLS_DESC_CALL
:
1941 case R_386_TLS_IE_32
:
1943 case R_386_TLS_GOTIE
:
1947 if (h
->got
.refcount
> 0)
1948 h
->got
.refcount
-= 1;
1949 if (h
->type
== STT_GNU_IFUNC
)
1951 if (h
->plt
.refcount
> 0)
1952 h
->plt
.refcount
-= 1;
1955 else if (local_got_refcounts
!= NULL
)
1957 if (local_got_refcounts
[r_symndx
] > 0)
1958 local_got_refcounts
[r_symndx
] -= 1;
1966 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1973 if (h
->plt
.refcount
> 0)
1974 h
->plt
.refcount
-= 1;
1979 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
1981 if (h
->got
.refcount
> 0)
1982 h
->got
.refcount
-= 1;
1983 if (h
->plt
.refcount
> 0)
1984 h
->plt
.refcount
-= 1;
1996 /* Adjust a symbol defined by a dynamic object and referenced by a
1997 regular object. The current definition is in some section of the
1998 dynamic object, but we're not including those sections. We have to
1999 change the definition to something the rest of the link can
2003 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2004 struct elf_link_hash_entry
*h
)
2006 struct elf_i386_link_hash_table
*htab
;
2008 struct elf_i386_link_hash_entry
*eh
;
2009 struct elf_dyn_relocs
*p
;
2011 /* STT_GNU_IFUNC symbol must go through PLT. */
2012 if (h
->type
== STT_GNU_IFUNC
)
2014 /* All local STT_GNU_IFUNC references must be treate as local
2015 calls via local PLT. */
2017 && SYMBOL_CALLS_LOCAL (info
, h
))
2019 bfd_size_type pc_count
= 0, count
= 0;
2020 struct elf_dyn_relocs
**pp
;
2022 eh
= (struct elf_i386_link_hash_entry
*) h
;
2023 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2025 pc_count
+= p
->pc_count
;
2026 p
->count
-= p
->pc_count
;
2035 if (pc_count
|| count
)
2039 if (h
->plt
.refcount
<= 0)
2040 h
->plt
.refcount
= 1;
2042 h
->plt
.refcount
+= 1;
2046 if (h
->plt
.refcount
<= 0)
2048 h
->plt
.offset
= (bfd_vma
) -1;
2054 /* If this is a function, put it in the procedure linkage table. We
2055 will fill in the contents of the procedure linkage table later,
2056 when we know the address of the .got section. */
2057 if (h
->type
== STT_FUNC
2060 if (h
->plt
.refcount
<= 0
2061 || SYMBOL_CALLS_LOCAL (info
, h
)
2062 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2063 && h
->root
.type
== bfd_link_hash_undefweak
))
2065 /* This case can occur if we saw a PLT32 reloc in an input
2066 file, but the symbol was never referred to by a dynamic
2067 object, or if all references were garbage collected. In
2068 such a case, we don't actually need to build a procedure
2069 linkage table, and we can just do a PC32 reloc instead. */
2070 h
->plt
.offset
= (bfd_vma
) -1;
2077 /* It's possible that we incorrectly decided a .plt reloc was
2078 needed for an R_386_PC32 reloc to a non-function sym in
2079 check_relocs. We can't decide accurately between function and
2080 non-function syms in check-relocs; Objects loaded later in
2081 the link may change h->type. So fix it now. */
2082 h
->plt
.offset
= (bfd_vma
) -1;
2084 /* If this is a weak symbol, and there is a real definition, the
2085 processor independent code will have arranged for us to see the
2086 real definition first, and we can just use the same value. */
2087 if (h
->u
.weakdef
!= NULL
)
2089 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2090 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2091 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2092 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2093 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2094 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2098 /* This is a reference to a symbol defined by a dynamic object which
2099 is not a function. */
2101 /* If we are creating a shared library, we must presume that the
2102 only references to the symbol are via the global offset table.
2103 For such cases we need not do anything here; the relocations will
2104 be handled correctly by relocate_section. */
2108 /* If there are no references to this symbol that do not use the
2109 GOT, we don't need to generate a copy reloc. */
2110 if (!h
->non_got_ref
)
2113 /* If -z nocopyreloc was given, we won't generate them either. */
2114 if (info
->nocopyreloc
)
2120 htab
= elf_i386_hash_table (info
);
2124 /* If there aren't any dynamic relocs in read-only sections, then
2125 we can keep the dynamic relocs and avoid the copy reloc. This
2126 doesn't work on VxWorks, where we can not have dynamic relocations
2127 (other than copy and jump slot relocations) in an executable. */
2128 if (ELIMINATE_COPY_RELOCS
2129 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2131 eh
= (struct elf_i386_link_hash_entry
*) h
;
2132 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2134 s
= p
->sec
->output_section
;
2135 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2146 /* We must allocate the symbol in our .dynbss section, which will
2147 become part of the .bss section of the executable. There will be
2148 an entry for this symbol in the .dynsym section. The dynamic
2149 object will contain position independent code, so all references
2150 from the dynamic object to this symbol will go through the global
2151 offset table. The dynamic linker will use the .dynsym entry to
2152 determine the address it must put in the global offset table, so
2153 both the dynamic object and the regular object will refer to the
2154 same memory location for the variable. */
2156 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2157 copy the initial value out of the dynamic object and into the
2158 runtime process image. */
2159 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2161 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2167 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2170 /* Allocate space in .plt, .got and associated reloc sections for
2174 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2176 struct bfd_link_info
*info
;
2177 struct elf_i386_link_hash_table
*htab
;
2178 struct elf_i386_link_hash_entry
*eh
;
2179 struct elf_dyn_relocs
*p
;
2180 unsigned plt_entry_size
;
2182 if (h
->root
.type
== bfd_link_hash_indirect
)
2185 eh
= (struct elf_i386_link_hash_entry
*) h
;
2187 info
= (struct bfd_link_info
*) inf
;
2188 htab
= elf_i386_hash_table (info
);
2192 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2194 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2195 here if it is defined and referenced in a non-shared object. */
2196 if (h
->type
== STT_GNU_IFUNC
2198 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2201 else if (htab
->elf
.dynamic_sections_created
2202 && h
->plt
.refcount
> 0)
2204 /* Make sure this symbol is output as a dynamic symbol.
2205 Undefined weak syms won't yet be marked as dynamic. */
2206 if (h
->dynindx
== -1
2207 && !h
->forced_local
)
2209 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2214 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2216 asection
*s
= htab
->elf
.splt
;
2218 /* If this is the first .plt entry, make room for the special
2221 s
->size
= plt_entry_size
;
2223 h
->plt
.offset
= s
->size
;
2225 /* If this symbol is not defined in a regular file, and we are
2226 not generating a shared library, then set the symbol to this
2227 location in the .plt. This is required to make function
2228 pointers compare as equal between the normal executable and
2229 the shared library. */
2233 h
->root
.u
.def
.section
= s
;
2234 h
->root
.u
.def
.value
= h
->plt
.offset
;
2237 /* Make room for this entry. */
2238 s
->size
+= plt_entry_size
;
2240 /* We also need to make an entry in the .got.plt section, which
2241 will be placed in the .got section by the linker script. */
2242 htab
->elf
.sgotplt
->size
+= 4;
2244 /* We also need to make an entry in the .rel.plt section. */
2245 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2246 htab
->elf
.srelplt
->reloc_count
++;
2248 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2251 /* VxWorks has a second set of relocations for each PLT entry
2252 in executables. They go in a separate relocation section,
2253 which is processed by the kernel loader. */
2255 /* There are two relocations for the initial PLT entry: an
2256 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2257 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2259 if (h
->plt
.offset
== plt_entry_size
)
2260 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2262 /* There are two extra relocations for each subsequent PLT entry:
2263 an R_386_32 relocation for the GOT entry, and an R_386_32
2264 relocation for the PLT entry. */
2266 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2271 h
->plt
.offset
= (bfd_vma
) -1;
2277 h
->plt
.offset
= (bfd_vma
) -1;
2281 eh
->tlsdesc_got
= (bfd_vma
) -1;
2283 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2284 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2285 if (h
->got
.refcount
> 0
2288 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2289 h
->got
.offset
= (bfd_vma
) -1;
2290 else if (h
->got
.refcount
> 0)
2294 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2296 /* Make sure this symbol is output as a dynamic symbol.
2297 Undefined weak syms won't yet be marked as dynamic. */
2298 if (h
->dynindx
== -1
2299 && !h
->forced_local
)
2301 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2306 if (GOT_TLS_GDESC_P (tls_type
))
2308 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2309 - elf_i386_compute_jump_table_size (htab
);
2310 htab
->elf
.sgotplt
->size
+= 8;
2311 h
->got
.offset
= (bfd_vma
) -2;
2313 if (! GOT_TLS_GDESC_P (tls_type
)
2314 || GOT_TLS_GD_P (tls_type
))
2316 h
->got
.offset
= s
->size
;
2318 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2319 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2322 dyn
= htab
->elf
.dynamic_sections_created
;
2323 /* R_386_TLS_IE_32 needs one dynamic relocation,
2324 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2325 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2326 need two), R_386_TLS_GD needs one if local symbol and two if
2328 if (tls_type
== GOT_TLS_IE_BOTH
)
2329 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2330 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2331 || (tls_type
& GOT_TLS_IE
))
2332 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2333 else if (GOT_TLS_GD_P (tls_type
))
2334 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2335 else if (! GOT_TLS_GDESC_P (tls_type
)
2336 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2337 || h
->root
.type
!= bfd_link_hash_undefweak
)
2339 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2340 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2341 if (GOT_TLS_GDESC_P (tls_type
))
2342 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2345 h
->got
.offset
= (bfd_vma
) -1;
2347 if (eh
->dyn_relocs
== NULL
)
2350 /* In the shared -Bsymbolic case, discard space allocated for
2351 dynamic pc-relative relocs against symbols which turn out to be
2352 defined in regular objects. For the normal shared case, discard
2353 space for pc-relative relocs that have become local due to symbol
2354 visibility changes. */
2358 /* The only reloc that uses pc_count is R_386_PC32, which will
2359 appear on a call or on something like ".long foo - .". We
2360 want calls to protected symbols to resolve directly to the
2361 function rather than going via the plt. If people want
2362 function pointer comparisons to work as expected then they
2363 should avoid writing assembly like ".long foo - .". */
2364 if (SYMBOL_CALLS_LOCAL (info
, h
))
2366 struct elf_dyn_relocs
**pp
;
2368 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2370 p
->count
-= p
->pc_count
;
2379 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2381 struct elf_dyn_relocs
**pp
;
2382 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2384 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2391 /* Also discard relocs on undefined weak syms with non-default
2393 if (eh
->dyn_relocs
!= NULL
2394 && h
->root
.type
== bfd_link_hash_undefweak
)
2396 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2397 eh
->dyn_relocs
= NULL
;
2399 /* Make sure undefined weak symbols are output as a dynamic
2401 else if (h
->dynindx
== -1
2402 && !h
->forced_local
)
2404 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2409 else if (ELIMINATE_COPY_RELOCS
)
2411 /* For the non-shared case, discard space for relocs against
2412 symbols which turn out to need copy relocs or are not
2418 || (htab
->elf
.dynamic_sections_created
2419 && (h
->root
.type
== bfd_link_hash_undefweak
2420 || h
->root
.type
== bfd_link_hash_undefined
))))
2422 /* Make sure this symbol is output as a dynamic symbol.
2423 Undefined weak syms won't yet be marked as dynamic. */
2424 if (h
->dynindx
== -1
2425 && !h
->forced_local
)
2427 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2431 /* If that succeeded, we know we'll be keeping all the
2433 if (h
->dynindx
!= -1)
2437 eh
->dyn_relocs
= NULL
;
2442 /* Finally, allocate space. */
2443 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2447 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2449 BFD_ASSERT (sreloc
!= NULL
);
2450 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2456 /* Allocate space in .plt, .got and associated reloc sections for
2457 local dynamic relocs. */
2460 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2462 struct elf_link_hash_entry
*h
2463 = (struct elf_link_hash_entry
*) *slot
;
2465 if (h
->type
!= STT_GNU_IFUNC
2469 || h
->root
.type
!= bfd_link_hash_defined
)
2472 return elf_i386_allocate_dynrelocs (h
, inf
);
2475 /* Find any dynamic relocs that apply to read-only sections. */
2478 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2480 struct elf_i386_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2483 /* Skip local IFUNC symbols. */
2484 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2487 eh
= (struct elf_i386_link_hash_entry
*) h
;
2488 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2490 asection
*s
= p
->sec
->output_section
;
2492 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2494 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2496 info
->flags
|= DF_TEXTREL
;
2498 if (info
->warn_shared_textrel
&& info
->shared
)
2499 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2500 p
->sec
->owner
, h
->root
.root
.string
,
2503 /* Not an error, just cut short the traversal. */
2511 mov foo@GOT(%reg), %reg
2513 lea foo@GOTOFF(%reg), %reg
2514 with the local symbol, foo. */
2517 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2518 struct bfd_link_info
*link_info
)
2520 Elf_Internal_Shdr
*symtab_hdr
;
2521 Elf_Internal_Rela
*internal_relocs
;
2522 Elf_Internal_Rela
*irel
, *irelend
;
2524 struct elf_i386_link_hash_table
*htab
;
2525 bfd_boolean changed_contents
;
2526 bfd_boolean changed_relocs
;
2527 bfd_signed_vma
*local_got_refcounts
;
2529 /* Don't even try to convert non-ELF outputs. */
2530 if (!is_elf_hash_table (link_info
->hash
))
2533 /* Nothing to do if there are no codes, no relocations or no output. */
2534 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2535 || sec
->reloc_count
== 0
2536 || bfd_is_abs_section (sec
->output_section
))
2539 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2541 /* Load the relocations for this section. */
2542 internal_relocs
= (_bfd_elf_link_read_relocs
2543 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2544 link_info
->keep_memory
));
2545 if (internal_relocs
== NULL
)
2548 htab
= elf_i386_hash_table (link_info
);
2549 changed_contents
= FALSE
;
2550 changed_relocs
= FALSE
;
2551 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2553 /* Get the section contents. */
2554 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2555 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2558 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2562 irelend
= internal_relocs
+ sec
->reloc_count
;
2563 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2565 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2566 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2568 struct elf_link_hash_entry
*h
;
2570 if (r_type
!= R_386_GOT32
)
2573 /* Get the symbol referred to by the reloc. */
2574 if (r_symndx
< symtab_hdr
->sh_info
)
2576 Elf_Internal_Sym
*isym
;
2578 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2581 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2582 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2583 && bfd_get_8 (input_bfd
,
2584 contents
+ irel
->r_offset
- 2) == 0x8b)
2586 bfd_put_8 (output_bfd
, 0x8d,
2587 contents
+ irel
->r_offset
- 2);
2588 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2589 if (local_got_refcounts
!= NULL
2590 && local_got_refcounts
[r_symndx
] > 0)
2591 local_got_refcounts
[r_symndx
] -= 1;
2592 changed_contents
= TRUE
;
2593 changed_relocs
= TRUE
;
2598 indx
= r_symndx
- symtab_hdr
->sh_info
;
2599 h
= elf_sym_hashes (abfd
)[indx
];
2600 BFD_ASSERT (h
!= NULL
);
2602 while (h
->root
.type
== bfd_link_hash_indirect
2603 || h
->root
.type
== bfd_link_hash_warning
)
2604 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2606 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2607 optimizing _DYNAMIC since ld.so may use its link-time address. */
2609 && h
->type
!= STT_GNU_IFUNC
2610 && h
!= htab
->elf
.hdynamic
2611 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2612 && bfd_get_8 (input_bfd
,
2613 contents
+ irel
->r_offset
- 2) == 0x8b)
2615 bfd_put_8 (output_bfd
, 0x8d,
2616 contents
+ irel
->r_offset
- 2);
2617 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2618 if (h
->got
.refcount
> 0)
2619 h
->got
.refcount
-= 1;
2620 changed_contents
= TRUE
;
2621 changed_relocs
= TRUE
;
2625 if (contents
!= NULL
2626 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2628 if (!changed_contents
&& !link_info
->keep_memory
)
2632 /* Cache the section contents for elf_link_input_bfd. */
2633 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2637 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2639 if (!changed_relocs
)
2640 free (internal_relocs
);
2642 elf_section_data (sec
)->relocs
= internal_relocs
;
2648 if (contents
!= NULL
2649 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2651 if (internal_relocs
!= NULL
2652 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2653 free (internal_relocs
);
2657 /* Set the sizes of the dynamic sections. */
2660 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2662 struct elf_i386_link_hash_table
*htab
;
2668 htab
= elf_i386_hash_table (info
);
2671 dynobj
= htab
->elf
.dynobj
;
2675 if (htab
->elf
.dynamic_sections_created
)
2677 /* Set the contents of the .interp section to the interpreter. */
2678 if (info
->executable
)
2680 s
= bfd_get_linker_section (dynobj
, ".interp");
2683 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2684 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2688 /* Set up .got offsets for local syms, and space for local dynamic
2690 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2692 bfd_signed_vma
*local_got
;
2693 bfd_signed_vma
*end_local_got
;
2694 char *local_tls_type
;
2695 bfd_vma
*local_tlsdesc_gotent
;
2696 bfd_size_type locsymcount
;
2697 Elf_Internal_Shdr
*symtab_hdr
;
2700 if (! is_i386_elf (ibfd
))
2703 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2705 struct elf_dyn_relocs
*p
;
2707 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2710 for (p
= ((struct elf_dyn_relocs
*)
2711 elf_section_data (s
)->local_dynrel
);
2715 if (!bfd_is_abs_section (p
->sec
)
2716 && bfd_is_abs_section (p
->sec
->output_section
))
2718 /* Input section has been discarded, either because
2719 it is a copy of a linkonce section or due to
2720 linker script /DISCARD/, so we'll be discarding
2723 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2724 && strcmp (p
->sec
->output_section
->name
,
2727 /* Relocations in vxworks .tls_vars sections are
2728 handled specially by the loader. */
2730 else if (p
->count
!= 0)
2732 srel
= elf_section_data (p
->sec
)->sreloc
;
2733 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2734 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2735 && (info
->flags
& DF_TEXTREL
) == 0)
2737 info
->flags
|= DF_TEXTREL
;
2738 if (info
->warn_shared_textrel
&& info
->shared
)
2739 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2740 p
->sec
->owner
, p
->sec
);
2746 local_got
= elf_local_got_refcounts (ibfd
);
2750 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2751 locsymcount
= symtab_hdr
->sh_info
;
2752 end_local_got
= local_got
+ locsymcount
;
2753 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2754 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2756 srel
= htab
->elf
.srelgot
;
2757 for (; local_got
< end_local_got
;
2758 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2760 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2763 if (GOT_TLS_GDESC_P (*local_tls_type
))
2765 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2766 - elf_i386_compute_jump_table_size (htab
);
2767 htab
->elf
.sgotplt
->size
+= 8;
2768 *local_got
= (bfd_vma
) -2;
2770 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2771 || GOT_TLS_GD_P (*local_tls_type
))
2773 *local_got
= s
->size
;
2775 if (GOT_TLS_GD_P (*local_tls_type
)
2776 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2780 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2781 || (*local_tls_type
& GOT_TLS_IE
))
2783 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2784 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2785 else if (GOT_TLS_GD_P (*local_tls_type
)
2786 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2787 srel
->size
+= sizeof (Elf32_External_Rel
);
2788 if (GOT_TLS_GDESC_P (*local_tls_type
))
2789 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2793 *local_got
= (bfd_vma
) -1;
2797 if (htab
->tls_ldm_got
.refcount
> 0)
2799 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2801 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2802 htab
->elf
.sgot
->size
+= 8;
2803 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2806 htab
->tls_ldm_got
.offset
= -1;
2808 /* Allocate global sym .plt and .got entries, and space for global
2809 sym dynamic relocs. */
2810 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2812 /* Allocate .plt and .got entries, and space for local symbols. */
2813 htab_traverse (htab
->loc_hash_table
,
2814 elf_i386_allocate_local_dynrelocs
,
2817 /* For every jump slot reserved in the sgotplt, reloc_count is
2818 incremented. However, when we reserve space for TLS descriptors,
2819 it's not incremented, so in order to compute the space reserved
2820 for them, it suffices to multiply the reloc count by the jump
2823 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2824 so that R_386_IRELATIVE entries come last. */
2825 if (htab
->elf
.srelplt
)
2827 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2828 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2829 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2831 else if (htab
->elf
.irelplt
)
2832 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2835 if (htab
->elf
.sgotplt
)
2837 /* Don't allocate .got.plt section if there are no GOT nor PLT
2838 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2839 if ((htab
->elf
.hgot
== NULL
2840 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2841 && (htab
->elf
.sgotplt
->size
2842 == get_elf_backend_data (output_bfd
)->got_header_size
)
2843 && (htab
->elf
.splt
== NULL
2844 || htab
->elf
.splt
->size
== 0)
2845 && (htab
->elf
.sgot
== NULL
2846 || htab
->elf
.sgot
->size
== 0)
2847 && (htab
->elf
.iplt
== NULL
2848 || htab
->elf
.iplt
->size
== 0)
2849 && (htab
->elf
.igotplt
== NULL
2850 || htab
->elf
.igotplt
->size
== 0))
2851 htab
->elf
.sgotplt
->size
= 0;
2855 if (htab
->plt_eh_frame
!= NULL
2856 && htab
->elf
.splt
!= NULL
2857 && htab
->elf
.splt
->size
!= 0
2858 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2859 && _bfd_elf_eh_frame_present (info
))
2860 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2862 /* We now have determined the sizes of the various dynamic sections.
2863 Allocate memory for them. */
2865 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2867 bfd_boolean strip_section
= TRUE
;
2869 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2872 if (s
== htab
->elf
.splt
2873 || s
== htab
->elf
.sgot
)
2875 /* Strip this section if we don't need it; see the
2877 /* We'd like to strip these sections if they aren't needed, but if
2878 we've exported dynamic symbols from them we must leave them.
2879 It's too late to tell BFD to get rid of the symbols. */
2881 if (htab
->elf
.hplt
!= NULL
)
2882 strip_section
= FALSE
;
2884 else if (s
== htab
->elf
.sgotplt
2885 || s
== htab
->elf
.iplt
2886 || s
== htab
->elf
.igotplt
2887 || s
== htab
->plt_eh_frame
2888 || s
== htab
->sdynbss
)
2890 /* Strip these too. */
2892 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2895 && s
!= htab
->elf
.srelplt
2896 && s
!= htab
->srelplt2
)
2899 /* We use the reloc_count field as a counter if we need
2900 to copy relocs into the output file. */
2905 /* It's not one of our sections, so don't allocate space. */
2911 /* If we don't need this section, strip it from the
2912 output file. This is mostly to handle .rel.bss and
2913 .rel.plt. We must create both sections in
2914 create_dynamic_sections, because they must be created
2915 before the linker maps input sections to output
2916 sections. The linker does that before
2917 adjust_dynamic_symbol is called, and it is that
2918 function which decides whether anything needs to go
2919 into these sections. */
2921 s
->flags
|= SEC_EXCLUDE
;
2925 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2928 /* Allocate memory for the section contents. We use bfd_zalloc
2929 here in case unused entries are not reclaimed before the
2930 section's contents are written out. This should not happen,
2931 but this way if it does, we get a R_386_NONE reloc instead
2933 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2934 if (s
->contents
== NULL
)
2938 if (htab
->plt_eh_frame
!= NULL
2939 && htab
->plt_eh_frame
->contents
!= NULL
)
2941 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2942 sizeof (elf_i386_eh_frame_plt
));
2943 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2944 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2947 if (htab
->elf
.dynamic_sections_created
)
2949 /* Add some entries to the .dynamic section. We fill in the
2950 values later, in elf_i386_finish_dynamic_sections, but we
2951 must add the entries now so that we get the correct size for
2952 the .dynamic section. The DT_DEBUG entry is filled in by the
2953 dynamic linker and used by the debugger. */
2954 #define add_dynamic_entry(TAG, VAL) \
2955 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2957 if (info
->executable
)
2959 if (!add_dynamic_entry (DT_DEBUG
, 0))
2963 if (htab
->elf
.splt
->size
!= 0)
2965 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2966 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2967 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2968 || !add_dynamic_entry (DT_JMPREL
, 0))
2974 if (!add_dynamic_entry (DT_REL
, 0)
2975 || !add_dynamic_entry (DT_RELSZ
, 0)
2976 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2979 /* If any dynamic relocs apply to a read-only section,
2980 then we need a DT_TEXTREL entry. */
2981 if ((info
->flags
& DF_TEXTREL
) == 0)
2982 elf_link_hash_traverse (&htab
->elf
,
2983 elf_i386_readonly_dynrelocs
, info
);
2985 if ((info
->flags
& DF_TEXTREL
) != 0)
2987 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2991 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2992 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2995 #undef add_dynamic_entry
3001 elf_i386_always_size_sections (bfd
*output_bfd
,
3002 struct bfd_link_info
*info
)
3004 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3008 struct elf_link_hash_entry
*tlsbase
;
3010 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3011 "_TLS_MODULE_BASE_",
3012 FALSE
, FALSE
, FALSE
);
3014 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3016 struct elf_i386_link_hash_table
*htab
;
3017 struct bfd_link_hash_entry
*bh
= NULL
;
3018 const struct elf_backend_data
*bed
3019 = get_elf_backend_data (output_bfd
);
3021 htab
= elf_i386_hash_table (info
);
3025 if (!(_bfd_generic_link_add_one_symbol
3026 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3027 tls_sec
, 0, NULL
, FALSE
,
3028 bed
->collect
, &bh
)))
3031 htab
->tls_module_base
= bh
;
3033 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3034 tlsbase
->def_regular
= 1;
3035 tlsbase
->other
= STV_HIDDEN
;
3036 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3043 /* Set the correct type for an x86 ELF section. We do this by the
3044 section name, which is a hack, but ought to work. */
3047 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3048 Elf_Internal_Shdr
*hdr
,
3053 name
= bfd_get_section_name (abfd
, sec
);
3055 /* This is an ugly, but unfortunately necessary hack that is
3056 needed when producing EFI binaries on x86. It tells
3057 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3058 containing ELF relocation info. We need this hack in order to
3059 be able to generate ELF binaries that can be translated into
3060 EFI applications (which are essentially COFF objects). Those
3061 files contain a COFF ".reloc" section inside an ELFNN object,
3062 which would normally cause BFD to segfault because it would
3063 attempt to interpret this section as containing relocation
3064 entries for section "oc". With this hack enabled, ".reloc"
3065 will be treated as a normal data section, which will avoid the
3066 segfault. However, you won't be able to create an ELFNN binary
3067 with a section named "oc" that needs relocations, but that's
3068 the kind of ugly side-effects you get when detecting section
3069 types based on their names... In practice, this limitation is
3070 unlikely to bite. */
3071 if (strcmp (name
, ".reloc") == 0)
3072 hdr
->sh_type
= SHT_PROGBITS
;
3077 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3078 executables. Rather than setting it to the beginning of the TLS
3079 section, we have to set it to the end. This function may be called
3080 multiple times, it is idempotent. */
3083 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3085 struct elf_i386_link_hash_table
*htab
;
3086 struct bfd_link_hash_entry
*base
;
3088 if (!info
->executable
)
3091 htab
= elf_i386_hash_table (info
);
3095 base
= htab
->tls_module_base
;
3099 base
->u
.def
.value
= htab
->elf
.tls_size
;
3102 /* Return the base VMA address which should be subtracted from real addresses
3103 when resolving @dtpoff relocation.
3104 This is PT_TLS segment p_vaddr. */
3107 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3109 /* If tls_sec is NULL, we should have signalled an error already. */
3110 if (elf_hash_table (info
)->tls_sec
== NULL
)
3112 return elf_hash_table (info
)->tls_sec
->vma
;
3115 /* Return the relocation value for @tpoff relocation
3116 if STT_TLS virtual address is ADDRESS. */
3119 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3121 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3122 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3123 bfd_vma static_tls_size
;
3125 /* If tls_sec is NULL, we should have signalled an error already. */
3126 if (htab
->tls_sec
== NULL
)
3129 /* Consider special static TLS alignment requirements. */
3130 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3131 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3134 /* Relocate an i386 ELF section. */
3137 elf_i386_relocate_section (bfd
*output_bfd
,
3138 struct bfd_link_info
*info
,
3140 asection
*input_section
,
3142 Elf_Internal_Rela
*relocs
,
3143 Elf_Internal_Sym
*local_syms
,
3144 asection
**local_sections
)
3146 struct elf_i386_link_hash_table
*htab
;
3147 Elf_Internal_Shdr
*symtab_hdr
;
3148 struct elf_link_hash_entry
**sym_hashes
;
3149 bfd_vma
*local_got_offsets
;
3150 bfd_vma
*local_tlsdesc_gotents
;
3151 Elf_Internal_Rela
*rel
;
3152 Elf_Internal_Rela
*relend
;
3153 bfd_boolean is_vxworks_tls
;
3154 unsigned plt_entry_size
;
3156 BFD_ASSERT (is_i386_elf (input_bfd
));
3158 htab
= elf_i386_hash_table (info
);
3161 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3162 sym_hashes
= elf_sym_hashes (input_bfd
);
3163 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3164 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3165 /* We have to handle relocations in vxworks .tls_vars sections
3166 specially, because the dynamic loader is 'weird'. */
3167 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3169 && !strcmp (input_section
->output_section
->name
,
3172 elf_i386_set_tls_module_base (info
);
3174 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3177 relend
= relocs
+ input_section
->reloc_count
;
3178 for (; rel
< relend
; rel
++)
3180 unsigned int r_type
;
3181 reloc_howto_type
*howto
;
3182 unsigned long r_symndx
;
3183 struct elf_link_hash_entry
*h
;
3184 Elf_Internal_Sym
*sym
;
3186 bfd_vma off
, offplt
;
3188 bfd_boolean unresolved_reloc
;
3189 bfd_reloc_status_type r
;
3194 r_type
= ELF32_R_TYPE (rel
->r_info
);
3195 if (r_type
== R_386_GNU_VTINHERIT
3196 || r_type
== R_386_GNU_VTENTRY
)
3199 if ((indx
= r_type
) >= R_386_standard
3200 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3201 >= R_386_ext
- R_386_standard
)
3202 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3203 >= R_386_irelative
- R_386_ext
))
3205 (*_bfd_error_handler
)
3206 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3207 input_bfd
, input_section
, r_type
);
3208 bfd_set_error (bfd_error_bad_value
);
3211 howto
= elf_howto_table
+ indx
;
3213 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3217 unresolved_reloc
= FALSE
;
3218 if (r_symndx
< symtab_hdr
->sh_info
)
3220 sym
= local_syms
+ r_symndx
;
3221 sec
= local_sections
[r_symndx
];
3222 relocation
= (sec
->output_section
->vma
3223 + sec
->output_offset
3225 st_size
= sym
->st_size
;
3227 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3228 && ((sec
->flags
& SEC_MERGE
) != 0
3229 || (info
->relocatable
3230 && sec
->output_offset
!= 0)))
3233 bfd_byte
*where
= contents
+ rel
->r_offset
;
3235 switch (howto
->size
)
3238 addend
= bfd_get_8 (input_bfd
, where
);
3239 if (howto
->pc_relative
)
3241 addend
= (addend
^ 0x80) - 0x80;
3246 addend
= bfd_get_16 (input_bfd
, where
);
3247 if (howto
->pc_relative
)
3249 addend
= (addend
^ 0x8000) - 0x8000;
3254 addend
= bfd_get_32 (input_bfd
, where
);
3255 if (howto
->pc_relative
)
3257 addend
= (addend
^ 0x80000000) - 0x80000000;
3265 if (info
->relocatable
)
3266 addend
+= sec
->output_offset
;
3269 asection
*msec
= sec
;
3270 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3272 addend
-= relocation
;
3273 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3276 switch (howto
->size
)
3279 /* FIXME: overflow checks. */
3280 if (howto
->pc_relative
)
3282 bfd_put_8 (input_bfd
, addend
, where
);
3285 if (howto
->pc_relative
)
3287 bfd_put_16 (input_bfd
, addend
, where
);
3290 if (howto
->pc_relative
)
3292 bfd_put_32 (input_bfd
, addend
, where
);
3296 else if (!info
->relocatable
3297 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3299 /* Relocate against local STT_GNU_IFUNC symbol. */
3300 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3305 /* Set STT_GNU_IFUNC symbol value. */
3306 h
->root
.u
.def
.value
= sym
->st_value
;
3307 h
->root
.u
.def
.section
= sec
;
3312 bfd_boolean warned ATTRIBUTE_UNUSED
;
3313 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3315 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3316 r_symndx
, symtab_hdr
, sym_hashes
,
3318 unresolved_reloc
, warned
, ignored
);
3322 if (sec
!= NULL
&& discarded_section (sec
))
3323 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3324 rel
, 1, relend
, howto
, 0, contents
);
3326 if (info
->relocatable
)
3329 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3330 it here if it is defined in a non-shared object. */
3332 && h
->type
== STT_GNU_IFUNC
3335 asection
*plt
, *gotplt
, *base_got
;
3339 if ((input_section
->flags
& SEC_ALLOC
) == 0
3340 || h
->plt
.offset
== (bfd_vma
) -1)
3343 /* STT_GNU_IFUNC symbol must go through PLT. */
3344 if (htab
->elf
.splt
!= NULL
)
3346 plt
= htab
->elf
.splt
;
3347 gotplt
= htab
->elf
.sgotplt
;
3351 plt
= htab
->elf
.iplt
;
3352 gotplt
= htab
->elf
.igotplt
;
3355 relocation
= (plt
->output_section
->vma
3356 + plt
->output_offset
+ h
->plt
.offset
);
3361 if (h
->root
.root
.string
)
3362 name
= h
->root
.root
.string
;
3364 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3366 (*_bfd_error_handler
)
3367 (_("%B: relocation %s against STT_GNU_IFUNC "
3368 "symbol `%s' isn't handled by %s"), input_bfd
,
3369 elf_howto_table
[r_type
].name
,
3370 name
, __FUNCTION__
);
3371 bfd_set_error (bfd_error_bad_value
);
3375 /* Generate dynamic relcoation only when there is a
3376 non-GOT reference in a shared object. */
3377 if (info
->shared
&& h
->non_got_ref
)
3379 Elf_Internal_Rela outrel
;
3383 /* Need a dynamic relocation to get the real function
3385 offset
= _bfd_elf_section_offset (output_bfd
,
3389 if (offset
== (bfd_vma
) -1
3390 || offset
== (bfd_vma
) -2)
3393 outrel
.r_offset
= (input_section
->output_section
->vma
3394 + input_section
->output_offset
3397 if (h
->dynindx
== -1
3399 || info
->executable
)
3401 /* This symbol is resolved locally. */
3402 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3403 bfd_put_32 (output_bfd
,
3404 (h
->root
.u
.def
.value
3405 + h
->root
.u
.def
.section
->output_section
->vma
3406 + h
->root
.u
.def
.section
->output_offset
),
3410 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3412 sreloc
= htab
->elf
.irelifunc
;
3413 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3415 /* If this reloc is against an external symbol, we
3416 do not want to fiddle with the addend. Otherwise,
3417 we need to include the symbol value so that it
3418 becomes an addend for the dynamic reloc. For an
3419 internal symbol, we have updated addend. */
3428 base_got
= htab
->elf
.sgot
;
3429 off
= h
->got
.offset
;
3431 if (base_got
== NULL
)
3434 if (off
== (bfd_vma
) -1)
3436 /* We can't use h->got.offset here to save state, or
3437 even just remember the offset, as finish_dynamic_symbol
3438 would use that as offset into .got. */
3440 if (htab
->elf
.splt
!= NULL
)
3442 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3443 off
= (plt_index
+ 3) * 4;
3444 base_got
= htab
->elf
.sgotplt
;
3448 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3449 off
= plt_index
* 4;
3450 base_got
= htab
->elf
.igotplt
;
3453 if (h
->dynindx
== -1
3457 /* This references the local defitionion. We must
3458 initialize this entry in the global offset table.
3459 Since the offset must always be a multiple of 8,
3460 we use the least significant bit to record
3461 whether we have initialized it already.
3463 When doing a dynamic link, we create a .rela.got
3464 relocation entry to initialize the value. This
3465 is done in the finish_dynamic_symbol routine. */
3470 bfd_put_32 (output_bfd
, relocation
,
3471 base_got
->contents
+ off
);
3478 /* Adjust for static executables. */
3479 if (htab
->elf
.splt
== NULL
)
3480 relocation
+= gotplt
->output_offset
;
3484 relocation
= (base_got
->output_section
->vma
3485 + base_got
->output_offset
+ off
3486 - gotplt
->output_section
->vma
3487 - gotplt
->output_offset
);
3488 /* Adjust for static executables. */
3489 if (htab
->elf
.splt
== NULL
)
3490 relocation
+= gotplt
->output_offset
;
3496 relocation
-= (gotplt
->output_section
->vma
3497 + gotplt
->output_offset
);
3505 /* Relocation is to the entry for this symbol in the global
3507 if (htab
->elf
.sgot
== NULL
)
3514 off
= h
->got
.offset
;
3515 dyn
= htab
->elf
.dynamic_sections_created
;
3516 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3518 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3519 || (ELF_ST_VISIBILITY (h
->other
)
3520 && h
->root
.type
== bfd_link_hash_undefweak
))
3522 /* This is actually a static link, or it is a
3523 -Bsymbolic link and the symbol is defined
3524 locally, or the symbol was forced to be local
3525 because of a version file. We must initialize
3526 this entry in the global offset table. Since the
3527 offset must always be a multiple of 4, we use the
3528 least significant bit to record whether we have
3529 initialized it already.
3531 When doing a dynamic link, we create a .rel.got
3532 relocation entry to initialize the value. This
3533 is done in the finish_dynamic_symbol routine. */
3538 bfd_put_32 (output_bfd
, relocation
,
3539 htab
->elf
.sgot
->contents
+ off
);
3544 unresolved_reloc
= FALSE
;
3548 if (local_got_offsets
== NULL
)
3551 off
= local_got_offsets
[r_symndx
];
3553 /* The offset must always be a multiple of 4. We use
3554 the least significant bit to record whether we have
3555 already generated the necessary reloc. */
3560 bfd_put_32 (output_bfd
, relocation
,
3561 htab
->elf
.sgot
->contents
+ off
);
3566 Elf_Internal_Rela outrel
;
3568 s
= htab
->elf
.srelgot
;
3572 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3573 + htab
->elf
.sgot
->output_offset
3575 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3576 elf_append_rel (output_bfd
, s
, &outrel
);
3579 local_got_offsets
[r_symndx
] |= 1;
3583 if (off
>= (bfd_vma
) -2)
3586 relocation
= htab
->elf
.sgot
->output_section
->vma
3587 + htab
->elf
.sgot
->output_offset
+ off
3588 - htab
->elf
.sgotplt
->output_section
->vma
3589 - htab
->elf
.sgotplt
->output_offset
;
3593 /* Relocation is relative to the start of the global offset
3596 /* Check to make sure it isn't a protected function symbol
3597 for shared library since it may not be local when used
3598 as function address. We also need to make sure that a
3599 symbol is defined locally. */
3600 if (info
->shared
&& h
)
3602 if (!h
->def_regular
)
3606 switch (ELF_ST_VISIBILITY (h
->other
))
3609 v
= _("hidden symbol");
3612 v
= _("internal symbol");
3615 v
= _("protected symbol");
3622 (*_bfd_error_handler
)
3623 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3624 input_bfd
, v
, h
->root
.root
.string
);
3625 bfd_set_error (bfd_error_bad_value
);
3628 else if (!info
->executable
3629 && !SYMBOLIC_BIND (info
, h
)
3630 && h
->type
== STT_FUNC
3631 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3633 (*_bfd_error_handler
)
3634 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3635 input_bfd
, h
->root
.root
.string
);
3636 bfd_set_error (bfd_error_bad_value
);
3641 /* Note that sgot is not involved in this
3642 calculation. We always want the start of .got.plt. If we
3643 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3644 permitted by the ABI, we might have to change this
3646 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3647 + htab
->elf
.sgotplt
->output_offset
;
3651 /* Use global offset table as symbol value. */
3652 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3653 + htab
->elf
.sgotplt
->output_offset
;
3654 unresolved_reloc
= FALSE
;
3658 /* Relocation is to the entry for this symbol in the
3659 procedure linkage table. */
3661 /* Resolve a PLT32 reloc against a local symbol directly,
3662 without using the procedure linkage table. */
3666 if (h
->plt
.offset
== (bfd_vma
) -1
3667 || htab
->elf
.splt
== NULL
)
3669 /* We didn't make a PLT entry for this symbol. This
3670 happens when statically linking PIC code, or when
3671 using -Bsymbolic. */
3675 relocation
= (htab
->elf
.splt
->output_section
->vma
3676 + htab
->elf
.splt
->output_offset
3678 unresolved_reloc
= FALSE
;
3682 /* Set to symbol size. */
3683 relocation
= st_size
;
3688 if ((input_section
->flags
& SEC_ALLOC
) == 0
3694 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3695 || h
->root
.type
!= bfd_link_hash_undefweak
)
3696 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3697 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3698 || (ELIMINATE_COPY_RELOCS
3705 || h
->root
.type
== bfd_link_hash_undefweak
3706 || h
->root
.type
== bfd_link_hash_undefined
)))
3708 Elf_Internal_Rela outrel
;
3709 bfd_boolean skip
, relocate
;
3712 /* When generating a shared object, these relocations
3713 are copied into the output file to be resolved at run
3720 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3722 if (outrel
.r_offset
== (bfd_vma
) -1)
3724 else if (outrel
.r_offset
== (bfd_vma
) -2)
3725 skip
= TRUE
, relocate
= TRUE
;
3726 outrel
.r_offset
+= (input_section
->output_section
->vma
3727 + input_section
->output_offset
);
3730 memset (&outrel
, 0, sizeof outrel
);
3733 && (r_type
== R_386_PC32
3735 || !SYMBOLIC_BIND (info
, h
)
3736 || !h
->def_regular
))
3737 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3740 /* This symbol is local, or marked to become local. */
3742 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3745 sreloc
= elf_section_data (input_section
)->sreloc
;
3747 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3749 r
= bfd_reloc_notsupported
;
3750 goto check_relocation_error
;
3753 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3755 /* If this reloc is against an external symbol, we do
3756 not want to fiddle with the addend. Otherwise, we
3757 need to include the symbol value so that it becomes
3758 an addend for the dynamic reloc. */
3765 if (!info
->executable
)
3767 Elf_Internal_Rela outrel
;
3770 outrel
.r_offset
= rel
->r_offset
3771 + input_section
->output_section
->vma
3772 + input_section
->output_offset
;
3773 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3774 sreloc
= elf_section_data (input_section
)->sreloc
;
3777 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3782 case R_386_TLS_GOTDESC
:
3783 case R_386_TLS_DESC_CALL
:
3784 case R_386_TLS_IE_32
:
3785 case R_386_TLS_GOTIE
:
3786 tls_type
= GOT_UNKNOWN
;
3787 if (h
== NULL
&& local_got_offsets
)
3788 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3790 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3791 if (tls_type
== GOT_TLS_IE
)
3792 tls_type
= GOT_TLS_IE_NEG
;
3794 if (! elf_i386_tls_transition (info
, input_bfd
,
3795 input_section
, contents
,
3796 symtab_hdr
, sym_hashes
,
3797 &r_type
, tls_type
, rel
,
3798 relend
, h
, r_symndx
))
3801 if (r_type
== R_386_TLS_LE_32
)
3803 BFD_ASSERT (! unresolved_reloc
);
3804 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3809 /* GD->LE transition. */
3810 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3813 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3815 movl %gs:0, %eax; subl $foo@tpoff, %eax
3816 (6 byte form of subl). */
3817 memcpy (contents
+ rel
->r_offset
- 3,
3818 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3819 roff
= rel
->r_offset
+ 5;
3823 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3825 movl %gs:0, %eax; subl $foo@tpoff, %eax
3826 (6 byte form of subl). */
3827 memcpy (contents
+ rel
->r_offset
- 2,
3828 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3829 roff
= rel
->r_offset
+ 6;
3831 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3833 /* Skip R_386_PC32/R_386_PLT32. */
3837 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3839 /* GDesc -> LE transition.
3840 It's originally something like:
3841 leal x@tlsdesc(%ebx), %eax
3845 Registers other than %eax may be set up here. */
3850 roff
= rel
->r_offset
;
3851 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3853 /* Now modify the instruction as appropriate. */
3854 /* aoliva FIXME: remove the above and xor the byte
3856 bfd_put_8 (output_bfd
, val
^ 0x86,
3857 contents
+ roff
- 1);
3858 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3862 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3864 /* GDesc -> LE transition.
3872 roff
= rel
->r_offset
;
3873 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3874 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3877 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3881 /* IE->LE transition:
3882 Originally it can be one of:
3890 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3893 /* movl foo, %eax. */
3894 bfd_put_8 (output_bfd
, 0xb8,
3895 contents
+ rel
->r_offset
- 1);
3901 type
= bfd_get_8 (input_bfd
,
3902 contents
+ rel
->r_offset
- 2);
3907 bfd_put_8 (output_bfd
, 0xc7,
3908 contents
+ rel
->r_offset
- 2);
3909 bfd_put_8 (output_bfd
,
3910 0xc0 | ((val
>> 3) & 7),
3911 contents
+ rel
->r_offset
- 1);
3915 bfd_put_8 (output_bfd
, 0x81,
3916 contents
+ rel
->r_offset
- 2);
3917 bfd_put_8 (output_bfd
,
3918 0xc0 | ((val
>> 3) & 7),
3919 contents
+ rel
->r_offset
- 1);
3926 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3927 contents
+ rel
->r_offset
);
3932 unsigned int val
, type
;
3934 /* {IE_32,GOTIE}->LE transition:
3935 Originally it can be one of:
3936 subl foo(%reg1), %reg2
3937 movl foo(%reg1), %reg2
3938 addl foo(%reg1), %reg2
3941 movl $foo, %reg2 (6 byte form)
3942 addl $foo, %reg2. */
3943 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3944 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3948 bfd_put_8 (output_bfd
, 0xc7,
3949 contents
+ rel
->r_offset
- 2);
3950 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3951 contents
+ rel
->r_offset
- 1);
3953 else if (type
== 0x2b)
3956 bfd_put_8 (output_bfd
, 0x81,
3957 contents
+ rel
->r_offset
- 2);
3958 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3959 contents
+ rel
->r_offset
- 1);
3961 else if (type
== 0x03)
3964 bfd_put_8 (output_bfd
, 0x81,
3965 contents
+ rel
->r_offset
- 2);
3966 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3967 contents
+ rel
->r_offset
- 1);
3971 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3972 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3973 contents
+ rel
->r_offset
);
3975 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3976 contents
+ rel
->r_offset
);
3981 if (htab
->elf
.sgot
== NULL
)
3986 off
= h
->got
.offset
;
3987 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3991 if (local_got_offsets
== NULL
)
3994 off
= local_got_offsets
[r_symndx
];
3995 offplt
= local_tlsdesc_gotents
[r_symndx
];
4002 Elf_Internal_Rela outrel
;
4006 if (htab
->elf
.srelgot
== NULL
)
4009 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4011 if (GOT_TLS_GDESC_P (tls_type
))
4014 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4015 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4016 <= htab
->elf
.sgotplt
->size
);
4017 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4018 + htab
->elf
.sgotplt
->output_offset
4020 + htab
->sgotplt_jump_table_size
);
4021 sreloc
= htab
->elf
.srelplt
;
4022 loc
= sreloc
->contents
;
4023 loc
+= (htab
->next_tls_desc_index
++
4024 * sizeof (Elf32_External_Rel
));
4025 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4026 <= sreloc
->contents
+ sreloc
->size
);
4027 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4030 BFD_ASSERT (! unresolved_reloc
);
4031 bfd_put_32 (output_bfd
,
4032 relocation
- elf_i386_dtpoff_base (info
),
4033 htab
->elf
.sgotplt
->contents
+ offplt
4034 + htab
->sgotplt_jump_table_size
+ 4);
4038 bfd_put_32 (output_bfd
, 0,
4039 htab
->elf
.sgotplt
->contents
+ offplt
4040 + htab
->sgotplt_jump_table_size
+ 4);
4044 sreloc
= htab
->elf
.srelgot
;
4046 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4047 + htab
->elf
.sgot
->output_offset
+ off
);
4049 if (GOT_TLS_GD_P (tls_type
))
4050 dr_type
= R_386_TLS_DTPMOD32
;
4051 else if (GOT_TLS_GDESC_P (tls_type
))
4053 else if (tls_type
== GOT_TLS_IE_POS
)
4054 dr_type
= R_386_TLS_TPOFF
;
4056 dr_type
= R_386_TLS_TPOFF32
;
4058 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4059 bfd_put_32 (output_bfd
,
4060 relocation
- elf_i386_dtpoff_base (info
),
4061 htab
->elf
.sgot
->contents
+ off
);
4062 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4063 bfd_put_32 (output_bfd
,
4064 elf_i386_dtpoff_base (info
) - relocation
,
4065 htab
->elf
.sgot
->contents
+ off
);
4066 else if (dr_type
!= R_386_TLS_DESC
)
4067 bfd_put_32 (output_bfd
, 0,
4068 htab
->elf
.sgot
->contents
+ off
);
4069 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4071 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4073 if (GOT_TLS_GD_P (tls_type
))
4077 BFD_ASSERT (! unresolved_reloc
);
4078 bfd_put_32 (output_bfd
,
4079 relocation
- elf_i386_dtpoff_base (info
),
4080 htab
->elf
.sgot
->contents
+ off
+ 4);
4084 bfd_put_32 (output_bfd
, 0,
4085 htab
->elf
.sgot
->contents
+ off
+ 4);
4086 outrel
.r_info
= ELF32_R_INFO (indx
,
4087 R_386_TLS_DTPOFF32
);
4088 outrel
.r_offset
+= 4;
4089 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4092 else if (tls_type
== GOT_TLS_IE_BOTH
)
4094 bfd_put_32 (output_bfd
,
4096 ? relocation
- elf_i386_dtpoff_base (info
)
4098 htab
->elf
.sgot
->contents
+ off
+ 4);
4099 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4100 outrel
.r_offset
+= 4;
4101 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4108 local_got_offsets
[r_symndx
] |= 1;
4111 if (off
>= (bfd_vma
) -2
4112 && ! GOT_TLS_GDESC_P (tls_type
))
4114 if (r_type
== R_386_TLS_GOTDESC
4115 || r_type
== R_386_TLS_DESC_CALL
)
4117 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4118 unresolved_reloc
= FALSE
;
4120 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4122 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4123 + htab
->elf
.sgotplt
->output_offset
;
4124 relocation
= htab
->elf
.sgot
->output_section
->vma
4125 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4126 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4127 && tls_type
== GOT_TLS_IE_BOTH
)
4129 if (r_type
== R_386_TLS_IE
)
4130 relocation
+= g_o_t
;
4131 unresolved_reloc
= FALSE
;
4133 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4135 unsigned int val
, type
;
4138 /* GD->IE transition. */
4139 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4140 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4143 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4145 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4147 roff
= rel
->r_offset
- 3;
4151 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4153 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4154 roff
= rel
->r_offset
- 2;
4156 memcpy (contents
+ roff
,
4157 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4158 contents
[roff
+ 7] = 0x80 | (val
& 7);
4159 /* If foo is used only with foo@gotntpoff(%reg) and
4160 foo@indntpoff, but not with foo@gottpoff(%reg), change
4161 subl $foo@gottpoff(%reg), %eax
4163 addl $foo@gotntpoff(%reg), %eax. */
4164 if (tls_type
== GOT_TLS_IE_POS
)
4165 contents
[roff
+ 6] = 0x03;
4166 bfd_put_32 (output_bfd
,
4167 htab
->elf
.sgot
->output_section
->vma
4168 + htab
->elf
.sgot
->output_offset
+ off
4169 - htab
->elf
.sgotplt
->output_section
->vma
4170 - htab
->elf
.sgotplt
->output_offset
,
4171 contents
+ roff
+ 8);
4172 /* Skip R_386_PLT32. */
4176 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4178 /* GDesc -> IE transition.
4179 It's originally something like:
4180 leal x@tlsdesc(%ebx), %eax
4183 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4185 movl x@gottpoff(%ebx), %eax # before negl %eax
4187 Registers other than %eax may be set up here. */
4191 /* First, make sure it's a leal adding ebx to a 32-bit
4192 offset into any register, although it's probably
4193 almost always going to be eax. */
4194 roff
= rel
->r_offset
;
4196 /* Now modify the instruction as appropriate. */
4197 /* To turn a leal into a movl in the form we use it, it
4198 suffices to change the first byte from 0x8d to 0x8b.
4199 aoliva FIXME: should we decide to keep the leal, all
4200 we have to do is remove the statement below, and
4201 adjust the relaxation of R_386_TLS_DESC_CALL. */
4202 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4204 if (tls_type
== GOT_TLS_IE_BOTH
)
4207 bfd_put_32 (output_bfd
,
4208 htab
->elf
.sgot
->output_section
->vma
4209 + htab
->elf
.sgot
->output_offset
+ off
4210 - htab
->elf
.sgotplt
->output_section
->vma
4211 - htab
->elf
.sgotplt
->output_offset
,
4215 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4217 /* GDesc -> IE transition.
4225 depending on how we transformed the TLS_GOTDESC above.
4230 roff
= rel
->r_offset
;
4232 /* Now modify the instruction as appropriate. */
4233 if (tls_type
!= GOT_TLS_IE_NEG
)
4236 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4237 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4242 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4243 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4253 if (! elf_i386_tls_transition (info
, input_bfd
,
4254 input_section
, contents
,
4255 symtab_hdr
, sym_hashes
,
4256 &r_type
, GOT_UNKNOWN
, rel
,
4257 relend
, h
, r_symndx
))
4260 if (r_type
!= R_386_TLS_LDM
)
4262 /* LD->LE transition:
4263 leal foo(%reg), %eax; call ___tls_get_addr.
4265 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4266 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4267 memcpy (contents
+ rel
->r_offset
- 2,
4268 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4269 /* Skip R_386_PC32/R_386_PLT32. */
4274 if (htab
->elf
.sgot
== NULL
)
4277 off
= htab
->tls_ldm_got
.offset
;
4282 Elf_Internal_Rela outrel
;
4284 if (htab
->elf
.srelgot
== NULL
)
4287 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4288 + htab
->elf
.sgot
->output_offset
+ off
);
4290 bfd_put_32 (output_bfd
, 0,
4291 htab
->elf
.sgot
->contents
+ off
);
4292 bfd_put_32 (output_bfd
, 0,
4293 htab
->elf
.sgot
->contents
+ off
+ 4);
4294 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4295 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4296 htab
->tls_ldm_got
.offset
|= 1;
4298 relocation
= htab
->elf
.sgot
->output_section
->vma
4299 + htab
->elf
.sgot
->output_offset
+ off
4300 - htab
->elf
.sgotplt
->output_section
->vma
4301 - htab
->elf
.sgotplt
->output_offset
;
4302 unresolved_reloc
= FALSE
;
4305 case R_386_TLS_LDO_32
:
4306 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4307 relocation
-= elf_i386_dtpoff_base (info
);
4309 /* When converting LDO to LE, we must negate. */
4310 relocation
= -elf_i386_tpoff (info
, relocation
);
4313 case R_386_TLS_LE_32
:
4315 if (!info
->executable
)
4317 Elf_Internal_Rela outrel
;
4320 outrel
.r_offset
= rel
->r_offset
4321 + input_section
->output_section
->vma
4322 + input_section
->output_offset
;
4323 if (h
!= NULL
&& h
->dynindx
!= -1)
4327 if (r_type
== R_386_TLS_LE_32
)
4328 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4330 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4331 sreloc
= elf_section_data (input_section
)->sreloc
;
4334 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4337 else if (r_type
== R_386_TLS_LE_32
)
4338 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4340 relocation
-= elf_i386_dtpoff_base (info
);
4342 else if (r_type
== R_386_TLS_LE_32
)
4343 relocation
= elf_i386_tpoff (info
, relocation
);
4345 relocation
= -elf_i386_tpoff (info
, relocation
);
4352 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4353 because such sections are not SEC_ALLOC and thus ld.so will
4354 not process them. */
4355 if (unresolved_reloc
4356 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4358 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4359 rel
->r_offset
) != (bfd_vma
) -1)
4361 (*_bfd_error_handler
)
4362 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4365 (long) rel
->r_offset
,
4367 h
->root
.root
.string
);
4372 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4373 contents
, rel
->r_offset
,
4376 check_relocation_error
:
4377 if (r
!= bfd_reloc_ok
)
4382 name
= h
->root
.root
.string
;
4385 name
= bfd_elf_string_from_elf_section (input_bfd
,
4386 symtab_hdr
->sh_link
,
4391 name
= bfd_section_name (input_bfd
, sec
);
4394 if (r
== bfd_reloc_overflow
)
4396 if (! ((*info
->callbacks
->reloc_overflow
)
4397 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4398 (bfd_vma
) 0, input_bfd
, input_section
,
4404 (*_bfd_error_handler
)
4405 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4406 input_bfd
, input_section
,
4407 (long) rel
->r_offset
, name
, (int) r
);
4416 /* Finish up dynamic symbol handling. We set the contents of various
4417 dynamic sections here. */
4420 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4421 struct bfd_link_info
*info
,
4422 struct elf_link_hash_entry
*h
,
4423 Elf_Internal_Sym
*sym
)
4425 struct elf_i386_link_hash_table
*htab
;
4426 unsigned plt_entry_size
;
4427 const struct elf_i386_backend_data
*abed
;
4429 htab
= elf_i386_hash_table (info
);
4433 abed
= get_elf_i386_backend_data (output_bfd
);
4434 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4436 if (h
->plt
.offset
!= (bfd_vma
) -1)
4440 Elf_Internal_Rela rel
;
4442 asection
*plt
, *gotplt
, *relplt
;
4444 /* When building a static executable, use .iplt, .igot.plt and
4445 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4446 if (htab
->elf
.splt
!= NULL
)
4448 plt
= htab
->elf
.splt
;
4449 gotplt
= htab
->elf
.sgotplt
;
4450 relplt
= htab
->elf
.srelplt
;
4454 plt
= htab
->elf
.iplt
;
4455 gotplt
= htab
->elf
.igotplt
;
4456 relplt
= htab
->elf
.irelplt
;
4459 /* This symbol has an entry in the procedure linkage table. Set
4462 if ((h
->dynindx
== -1
4463 && !((h
->forced_local
|| info
->executable
)
4465 && h
->type
== STT_GNU_IFUNC
))
4471 /* Get the index in the procedure linkage table which
4472 corresponds to this symbol. This is the index of this symbol
4473 in all the symbols for which we are making plt entries. The
4474 first entry in the procedure linkage table is reserved.
4476 Get the offset into the .got table of the entry that
4477 corresponds to this function. Each .got entry is 4 bytes.
4478 The first three are reserved.
4480 For static executables, we don't reserve anything. */
4482 if (plt
== htab
->elf
.splt
)
4484 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4485 got_offset
= (got_offset
+ 3) * 4;
4489 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4490 got_offset
= got_offset
* 4;
4493 /* Fill in the entry in the procedure linkage table. */
4496 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4497 abed
->plt
->plt_entry_size
);
4498 bfd_put_32 (output_bfd
,
4499 (gotplt
->output_section
->vma
4500 + gotplt
->output_offset
4502 plt
->contents
+ h
->plt
.offset
4503 + abed
->plt
->plt_got_offset
);
4505 if (abed
->is_vxworks
)
4507 int s
, k
, reloc_index
;
4509 /* Create the R_386_32 relocation referencing the GOT
4510 for this PLT entry. */
4512 /* S: Current slot number (zero-based). */
4513 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4514 / abed
->plt
->plt_entry_size
);
4515 /* K: Number of relocations for PLTResolve. */
4517 k
= PLTRESOLVE_RELOCS_SHLIB
;
4519 k
= PLTRESOLVE_RELOCS
;
4520 /* Skip the PLTresolve relocations, and the relocations for
4521 the other PLT slots. */
4522 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4523 loc
= (htab
->srelplt2
->contents
+ reloc_index
4524 * sizeof (Elf32_External_Rel
));
4526 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4527 + htab
->elf
.splt
->output_offset
4528 + h
->plt
.offset
+ 2),
4529 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4530 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4532 /* Create the R_386_32 relocation referencing the beginning of
4533 the PLT for this GOT entry. */
4534 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4535 + htab
->elf
.sgotplt
->output_offset
4537 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4538 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4539 loc
+ sizeof (Elf32_External_Rel
));
4544 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4545 abed
->plt
->plt_entry_size
);
4546 bfd_put_32 (output_bfd
, got_offset
,
4547 plt
->contents
+ h
->plt
.offset
4548 + abed
->plt
->plt_got_offset
);
4551 /* Fill in the entry in the global offset table. */
4552 bfd_put_32 (output_bfd
,
4553 (plt
->output_section
->vma
4554 + plt
->output_offset
4556 + abed
->plt
->plt_lazy_offset
),
4557 gotplt
->contents
+ got_offset
);
4559 /* Fill in the entry in the .rel.plt section. */
4560 rel
.r_offset
= (gotplt
->output_section
->vma
4561 + gotplt
->output_offset
4563 if (h
->dynindx
== -1
4564 || ((info
->executable
4565 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4567 && h
->type
== STT_GNU_IFUNC
))
4569 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4570 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4571 in the .got.plt section. */
4572 bfd_put_32 (output_bfd
,
4573 (h
->root
.u
.def
.value
4574 + h
->root
.u
.def
.section
->output_section
->vma
4575 + h
->root
.u
.def
.section
->output_offset
),
4576 gotplt
->contents
+ got_offset
);
4577 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4578 /* R_386_IRELATIVE comes last. */
4579 plt_index
= htab
->next_irelative_index
--;
4583 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4584 plt_index
= htab
->next_jump_slot_index
++;
4586 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4587 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4589 /* Don't fill PLT entry for static executables. */
4590 if (plt
== htab
->elf
.splt
)
4592 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4593 plt
->contents
+ h
->plt
.offset
4594 + abed
->plt
->plt_reloc_offset
);
4595 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4596 + abed
->plt
->plt_plt_offset
+ 4),
4597 plt
->contents
+ h
->plt
.offset
4598 + abed
->plt
->plt_plt_offset
);
4601 if (!h
->def_regular
)
4603 /* Mark the symbol as undefined, rather than as defined in
4604 the .plt section. Leave the value if there were any
4605 relocations where pointer equality matters (this is a clue
4606 for the dynamic linker, to make function pointer
4607 comparisons work between an application and shared
4608 library), otherwise set it to zero. If a function is only
4609 called from a binary, there is no need to slow down
4610 shared libraries because of that. */
4611 sym
->st_shndx
= SHN_UNDEF
;
4612 if (!h
->pointer_equality_needed
)
4617 if (h
->got
.offset
!= (bfd_vma
) -1
4618 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4619 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4621 Elf_Internal_Rela rel
;
4623 /* This symbol has an entry in the global offset table. Set it
4626 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4629 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4630 + htab
->elf
.sgot
->output_offset
4631 + (h
->got
.offset
& ~(bfd_vma
) 1));
4633 /* If this is a static link, or it is a -Bsymbolic link and the
4634 symbol is defined locally or was forced to be local because
4635 of a version file, we just want to emit a RELATIVE reloc.
4636 The entry in the global offset table will already have been
4637 initialized in the relocate_section function. */
4639 && h
->type
== STT_GNU_IFUNC
)
4643 /* Generate R_386_GLOB_DAT. */
4650 if (!h
->pointer_equality_needed
)
4653 /* For non-shared object, we can't use .got.plt, which
4654 contains the real function addres if we need pointer
4655 equality. We load the GOT entry with the PLT entry. */
4656 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4657 bfd_put_32 (output_bfd
,
4658 (plt
->output_section
->vma
4659 + plt
->output_offset
+ h
->plt
.offset
),
4660 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4664 else if (info
->shared
4665 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4667 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4668 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4672 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4674 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4675 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4676 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4679 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4684 Elf_Internal_Rela rel
;
4686 /* This symbol needs a copy reloc. Set it up. */
4688 if (h
->dynindx
== -1
4689 || (h
->root
.type
!= bfd_link_hash_defined
4690 && h
->root
.type
!= bfd_link_hash_defweak
)
4691 || htab
->srelbss
== NULL
)
4694 rel
.r_offset
= (h
->root
.u
.def
.value
4695 + h
->root
.u
.def
.section
->output_section
->vma
4696 + h
->root
.u
.def
.section
->output_offset
);
4697 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4698 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4704 /* Finish up local dynamic symbol handling. We set the contents of
4705 various dynamic sections here. */
4708 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4710 struct elf_link_hash_entry
*h
4711 = (struct elf_link_hash_entry
*) *slot
;
4712 struct bfd_link_info
*info
4713 = (struct bfd_link_info
*) inf
;
4715 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4719 /* Used to decide how to sort relocs in an optimal manner for the
4720 dynamic linker, before writing them out. */
4722 static enum elf_reloc_type_class
4723 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4724 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4725 const Elf_Internal_Rela
*rela
)
4727 switch (ELF32_R_TYPE (rela
->r_info
))
4729 case R_386_RELATIVE
:
4730 return reloc_class_relative
;
4731 case R_386_JUMP_SLOT
:
4732 return reloc_class_plt
;
4734 return reloc_class_copy
;
4736 return reloc_class_normal
;
4740 /* Finish up the dynamic sections. */
4743 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4744 struct bfd_link_info
*info
)
4746 struct elf_i386_link_hash_table
*htab
;
4749 const struct elf_i386_backend_data
*abed
;
4751 htab
= elf_i386_hash_table (info
);
4755 dynobj
= htab
->elf
.dynobj
;
4756 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4757 abed
= get_elf_i386_backend_data (output_bfd
);
4759 if (htab
->elf
.dynamic_sections_created
)
4761 Elf32_External_Dyn
*dyncon
, *dynconend
;
4763 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4766 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4767 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4768 for (; dyncon
< dynconend
; dyncon
++)
4770 Elf_Internal_Dyn dyn
;
4773 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4778 if (abed
->is_vxworks
4779 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4784 s
= htab
->elf
.sgotplt
;
4785 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4789 s
= htab
->elf
.srelplt
;
4790 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4794 s
= htab
->elf
.srelplt
;
4795 dyn
.d_un
.d_val
= s
->size
;
4799 /* My reading of the SVR4 ABI indicates that the
4800 procedure linkage table relocs (DT_JMPREL) should be
4801 included in the overall relocs (DT_REL). This is
4802 what Solaris does. However, UnixWare can not handle
4803 that case. Therefore, we override the DT_RELSZ entry
4804 here to make it not include the JMPREL relocs. */
4805 s
= htab
->elf
.srelplt
;
4808 dyn
.d_un
.d_val
-= s
->size
;
4812 /* We may not be using the standard ELF linker script.
4813 If .rel.plt is the first .rel section, we adjust
4814 DT_REL to not include it. */
4815 s
= htab
->elf
.srelplt
;
4818 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4820 dyn
.d_un
.d_ptr
+= s
->size
;
4824 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4827 /* Fill in the first entry in the procedure linkage table. */
4828 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4832 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4833 abed
->plt
->plt0_entry_size
);
4834 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4835 abed
->plt0_pad_byte
,
4836 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4840 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4841 abed
->plt
->plt0_entry_size
);
4842 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4843 abed
->plt0_pad_byte
,
4844 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4845 bfd_put_32 (output_bfd
,
4846 (htab
->elf
.sgotplt
->output_section
->vma
4847 + htab
->elf
.sgotplt
->output_offset
4849 htab
->elf
.splt
->contents
4850 + abed
->plt
->plt0_got1_offset
);
4851 bfd_put_32 (output_bfd
,
4852 (htab
->elf
.sgotplt
->output_section
->vma
4853 + htab
->elf
.sgotplt
->output_offset
4855 htab
->elf
.splt
->contents
4856 + abed
->plt
->plt0_got2_offset
);
4858 if (abed
->is_vxworks
)
4860 Elf_Internal_Rela rel
;
4862 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4863 On IA32 we use REL relocations so the addend goes in
4864 the PLT directly. */
4865 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4866 + htab
->elf
.splt
->output_offset
4867 + abed
->plt
->plt0_got1_offset
);
4868 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4869 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4870 htab
->srelplt2
->contents
);
4871 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4872 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4873 + htab
->elf
.splt
->output_offset
4874 + abed
->plt
->plt0_got2_offset
);
4875 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4876 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4877 htab
->srelplt2
->contents
+
4878 sizeof (Elf32_External_Rel
));
4882 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4883 really seem like the right value. */
4884 elf_section_data (htab
->elf
.splt
->output_section
)
4885 ->this_hdr
.sh_entsize
= 4;
4887 /* Correct the .rel.plt.unloaded relocations. */
4888 if (abed
->is_vxworks
&& !info
->shared
)
4890 int num_plts
= (htab
->elf
.splt
->size
4891 / abed
->plt
->plt_entry_size
) - 1;
4894 p
= htab
->srelplt2
->contents
;
4896 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4898 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4900 for (; num_plts
; num_plts
--)
4902 Elf_Internal_Rela rel
;
4903 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4904 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4905 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4906 p
+= sizeof (Elf32_External_Rel
);
4908 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4909 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4910 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4911 p
+= sizeof (Elf32_External_Rel
);
4917 if (htab
->elf
.sgotplt
)
4919 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4921 (*_bfd_error_handler
)
4922 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4926 /* Fill in the first three entries in the global offset table. */
4927 if (htab
->elf
.sgotplt
->size
> 0)
4929 bfd_put_32 (output_bfd
,
4931 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4932 htab
->elf
.sgotplt
->contents
);
4933 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4934 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4937 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4940 /* Adjust .eh_frame for .plt section. */
4941 if (htab
->plt_eh_frame
!= NULL
4942 && htab
->plt_eh_frame
->contents
!= NULL
)
4944 if (htab
->elf
.splt
!= NULL
4945 && htab
->elf
.splt
->size
!= 0
4946 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4947 && htab
->elf
.splt
->output_section
!= NULL
4948 && htab
->plt_eh_frame
->output_section
!= NULL
)
4950 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4951 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4952 + htab
->plt_eh_frame
->output_offset
4953 + PLT_FDE_START_OFFSET
;
4954 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4955 htab
->plt_eh_frame
->contents
4956 + PLT_FDE_START_OFFSET
);
4958 if (htab
->plt_eh_frame
->sec_info_type
4959 == SEC_INFO_TYPE_EH_FRAME
)
4961 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4963 htab
->plt_eh_frame
->contents
))
4968 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4969 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4971 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4972 htab_traverse (htab
->loc_hash_table
,
4973 elf_i386_finish_local_dynamic_symbol
,
4979 /* Return address in section PLT for the Ith GOTPLT relocation, for
4980 relocation REL or (bfd_vma) -1 if it should not be included. */
4983 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
, const arelent
*rel
)
4986 const struct elf_i386_backend_data
*bed
;
4989 /* Only match R_386_JUMP_SLOT and R_386_IRELATIVE. */
4990 if (rel
->howto
->type
!= R_386_JUMP_SLOT
4991 && rel
->howto
->type
!= R_386_IRELATIVE
)
4992 return (bfd_vma
) -1;
4995 bed
= get_elf_i386_backend_data (abfd
);
4996 plt_offset
= bed
->plt
->plt_entry_size
;
4998 if (elf_elfheader (abfd
)->e_ident
[EI_OSABI
] != ELFOSABI_GNU
)
4999 return plt
->vma
+ (i
+ 1) * plt_offset
;
5001 while (plt_offset
< plt
->size
)
5003 bfd_vma reloc_offset
;
5004 bfd_byte reloc_offset_raw
[4];
5006 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5008 plt_offset
+ bed
->plt
->plt_reloc_offset
,
5009 sizeof (reloc_offset_raw
)))
5010 return (bfd_vma
) -1;
5012 reloc_offset
= H_GET_32 (abfd
, reloc_offset_raw
);
5013 if (reloc_offset
== i
* sizeof (Elf32_External_Rel
))
5014 return plt
->vma
+ plt_offset
;
5015 plt_offset
+= bed
->plt
->plt_entry_size
;
5021 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5024 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5026 if (h
->plt
.offset
!= (bfd_vma
) -1
5028 && !h
->pointer_equality_needed
)
5031 return _bfd_elf_hash_symbol (h
);
5034 /* Hook called by the linker routine which adds symbols from an object
5038 elf_i386_add_symbol_hook (bfd
* abfd
,
5039 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5040 Elf_Internal_Sym
* sym
,
5041 const char ** namep ATTRIBUTE_UNUSED
,
5042 flagword
* flagsp ATTRIBUTE_UNUSED
,
5043 asection
** secp ATTRIBUTE_UNUSED
,
5044 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5046 if ((abfd
->flags
& DYNAMIC
) == 0
5047 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5048 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5049 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5054 #define TARGET_LITTLE_SYM i386_elf32_vec
5055 #define TARGET_LITTLE_NAME "elf32-i386"
5056 #define ELF_ARCH bfd_arch_i386
5057 #define ELF_TARGET_ID I386_ELF_DATA
5058 #define ELF_MACHINE_CODE EM_386
5059 #define ELF_MAXPAGESIZE 0x1000
5061 #define elf_backend_can_gc_sections 1
5062 #define elf_backend_can_refcount 1
5063 #define elf_backend_want_got_plt 1
5064 #define elf_backend_plt_readonly 1
5065 #define elf_backend_want_plt_sym 0
5066 #define elf_backend_got_header_size 12
5067 #define elf_backend_plt_alignment 4
5069 /* Support RELA for objdump of prelink objects. */
5070 #define elf_info_to_howto elf_i386_info_to_howto_rel
5071 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5073 #define bfd_elf32_mkobject elf_i386_mkobject
5075 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5076 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5077 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5078 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5080 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5081 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5082 #define elf_backend_check_relocs elf_i386_check_relocs
5083 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5084 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5085 #define elf_backend_fake_sections elf_i386_fake_sections
5086 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5087 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5088 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5089 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5090 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5091 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5092 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5093 #define elf_backend_relocate_section elf_i386_relocate_section
5094 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5095 #define elf_backend_always_size_sections elf_i386_always_size_sections
5096 #define elf_backend_omit_section_dynsym \
5097 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5098 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5099 #define elf_backend_hash_symbol elf_i386_hash_symbol
5100 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5102 #include "elf32-target.h"
5104 /* FreeBSD support. */
5106 #undef TARGET_LITTLE_SYM
5107 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5108 #undef TARGET_LITTLE_NAME
5109 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5111 #define ELF_OSABI ELFOSABI_FREEBSD
5113 /* The kernel recognizes executables as valid only if they carry a
5114 "FreeBSD" label in the ELF header. So we put this label on all
5115 executables and (for simplicity) also all other object files. */
5118 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5120 _bfd_elf_post_process_headers (abfd
, info
);
5122 #ifdef OLD_FREEBSD_ABI_LABEL
5124 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5125 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5126 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5131 #undef elf_backend_post_process_headers
5132 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5134 #define elf32_bed elf32_i386_fbsd_bed
5136 #undef elf_backend_add_symbol_hook
5138 #include "elf32-target.h"
5142 #undef TARGET_LITTLE_SYM
5143 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5144 #undef TARGET_LITTLE_NAME
5145 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5147 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5148 objects won't be recognized. */
5152 #define elf32_bed elf32_i386_sol2_bed
5154 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5156 #undef elf_backend_static_tls_alignment
5157 #define elf_backend_static_tls_alignment 8
5159 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5161 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5163 #undef elf_backend_want_plt_sym
5164 #define elf_backend_want_plt_sym 1
5166 #include "elf32-target.h"
5168 /* Native Client support. */
5170 #undef TARGET_LITTLE_SYM
5171 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5172 #undef TARGET_LITTLE_NAME
5173 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5175 #define elf32_bed elf32_i386_nacl_bed
5177 #undef ELF_MAXPAGESIZE
5178 #define ELF_MAXPAGESIZE 0x10000
5180 /* Restore defaults. */
5182 #undef elf_backend_want_plt_sym
5183 #define elf_backend_want_plt_sym 0
5184 #undef elf_backend_post_process_headers
5185 #undef elf_backend_static_tls_alignment
5187 /* NaCl uses substantially different PLT entries for the same effects. */
5189 #undef elf_backend_plt_alignment
5190 #define elf_backend_plt_alignment 5
5191 #define NACL_PLT_ENTRY_SIZE 64
5192 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5194 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5196 0xff, 0x35, /* pushl contents of address */
5197 0, 0, 0, 0, /* replaced with address of .got + 4. */
5198 0x8b, 0x0d, /* movl contents of address, %ecx */
5199 0, 0, 0, 0, /* replaced with address of .got + 8. */
5200 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5201 0xff, 0xe1 /* jmp *%ecx */
5204 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5206 0x8b, 0x0d, /* movl contents of address, %ecx */
5207 0, 0, 0, 0, /* replaced with GOT slot address. */
5208 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5209 0xff, 0xe1, /* jmp *%ecx */
5211 /* Pad to the next 32-byte boundary with nop instructions. */
5213 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5214 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5216 /* Lazy GOT entries point here (32-byte aligned). */
5217 0x68, /* pushl immediate */
5218 0, 0, 0, 0, /* replaced with reloc offset. */
5219 0xe9, /* jmp relative */
5220 0, 0, 0, 0, /* replaced with offset to .plt. */
5222 /* Pad to the next 32-byte boundary with nop instructions. */
5223 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5224 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5228 static const bfd_byte
5229 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5231 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5232 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5233 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5234 0xff, 0xe1, /* jmp *%ecx */
5236 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5237 so pad to that size with nop instructions. */
5238 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5241 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5243 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5244 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5245 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5246 0xff, 0xe1, /* jmp *%ecx */
5248 /* Pad to the next 32-byte boundary with nop instructions. */
5250 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5251 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5253 /* Lazy GOT entries point here (32-byte aligned). */
5254 0x68, /* pushl immediate */
5255 0, 0, 0, 0, /* replaced with offset into relocation table. */
5256 0xe9, /* jmp relative */
5257 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5259 /* Pad to the next 32-byte boundary with nop instructions. */
5260 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5261 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5265 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5267 #if (PLT_CIE_LENGTH != 20 \
5268 || PLT_FDE_LENGTH != 36 \
5269 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5270 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5271 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5273 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5274 0, 0, 0, 0, /* CIE ID */
5275 1, /* CIE version */
5276 'z', 'R', 0, /* Augmentation string */
5277 1, /* Code alignment factor */
5278 0x7c, /* Data alignment factor: -4 */
5279 8, /* Return address column */
5280 1, /* Augmentation size */
5281 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5282 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5283 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5284 DW_CFA_nop
, DW_CFA_nop
,
5286 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5287 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5288 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5289 0, 0, 0, 0, /* .plt size goes here */
5290 0, /* Augmentation size */
5291 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5292 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5293 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5294 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5295 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5296 13, /* Block length */
5297 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5298 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5299 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5300 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5301 DW_CFA_nop
, DW_CFA_nop
5304 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5306 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5307 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5308 2, /* plt0_got1_offset */
5309 8, /* plt0_got2_offset */
5310 elf_i386_nacl_plt_entry
, /* plt_entry */
5311 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5312 2, /* plt_got_offset */
5313 33, /* plt_reloc_offset */
5314 38, /* plt_plt_offset */
5315 32, /* plt_lazy_offset */
5316 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5317 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5318 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5319 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5322 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5324 &elf_i386_nacl_plt
, /* plt */
5325 0x90, /* plt0_pad_byte: nop insn */
5330 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5332 /* Set the right machine number for a NaCl i386 ELF32 file. */
5333 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5337 #undef elf_backend_arch_data
5338 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5340 #undef elf_backend_object_p
5341 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5342 #undef elf_backend_modify_segment_map
5343 #define elf_backend_modify_segment_map nacl_modify_segment_map
5344 #undef elf_backend_modify_program_headers
5345 #define elf_backend_modify_program_headers nacl_modify_program_headers
5346 #undef elf_backend_final_write_processing
5347 #define elf_backend_final_write_processing nacl_final_write_processing
5349 #include "elf32-target.h"
5351 /* Restore defaults. */
5352 #undef elf_backend_object_p
5353 #undef elf_backend_modify_segment_map
5354 #undef elf_backend_modify_program_headers
5355 #undef elf_backend_final_write_processing
5357 /* VxWorks support. */
5359 #undef TARGET_LITTLE_SYM
5360 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5361 #undef TARGET_LITTLE_NAME
5362 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5364 #undef elf_backend_plt_alignment
5365 #define elf_backend_plt_alignment 4
5367 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5369 &elf_i386_plt
, /* plt */
5370 0x90, /* plt0_pad_byte */
5374 #undef elf_backend_arch_data
5375 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5377 #undef elf_backend_relocs_compatible
5378 #undef elf_backend_add_symbol_hook
5379 #define elf_backend_add_symbol_hook \
5380 elf_vxworks_add_symbol_hook
5381 #undef elf_backend_link_output_symbol_hook
5382 #define elf_backend_link_output_symbol_hook \
5383 elf_vxworks_link_output_symbol_hook
5384 #undef elf_backend_emit_relocs
5385 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5386 #undef elf_backend_final_write_processing
5387 #define elf_backend_final_write_processing \
5388 elf_vxworks_final_write_processing
5389 #undef elf_backend_static_tls_alignment
5391 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5393 #undef elf_backend_want_plt_sym
5394 #define elf_backend_want_plt_sym 1
5397 #define elf32_bed elf32_i386_vxworks_bed
5399 #include "elf32-target.h"