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 && irel
->r_offset
>= 2
2584 && bfd_get_8 (input_bfd
,
2585 contents
+ irel
->r_offset
- 2) == 0x8b)
2587 bfd_put_8 (output_bfd
, 0x8d,
2588 contents
+ irel
->r_offset
- 2);
2589 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2590 if (local_got_refcounts
!= NULL
2591 && local_got_refcounts
[r_symndx
] > 0)
2592 local_got_refcounts
[r_symndx
] -= 1;
2593 changed_contents
= TRUE
;
2594 changed_relocs
= TRUE
;
2599 indx
= r_symndx
- symtab_hdr
->sh_info
;
2600 h
= elf_sym_hashes (abfd
)[indx
];
2601 BFD_ASSERT (h
!= NULL
);
2603 while (h
->root
.type
== bfd_link_hash_indirect
2604 || h
->root
.type
== bfd_link_hash_warning
)
2605 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2607 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2608 optimizing _DYNAMIC since ld.so may use its link-time address. */
2610 && h
->type
!= STT_GNU_IFUNC
2611 && h
!= htab
->elf
.hdynamic
2612 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2613 && irel
->r_offset
>= 2
2614 && bfd_get_8 (input_bfd
,
2615 contents
+ irel
->r_offset
- 2) == 0x8b)
2617 bfd_put_8 (output_bfd
, 0x8d,
2618 contents
+ irel
->r_offset
- 2);
2619 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2620 if (h
->got
.refcount
> 0)
2621 h
->got
.refcount
-= 1;
2622 changed_contents
= TRUE
;
2623 changed_relocs
= TRUE
;
2627 if (contents
!= NULL
2628 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2630 if (!changed_contents
&& !link_info
->keep_memory
)
2634 /* Cache the section contents for elf_link_input_bfd. */
2635 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2639 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2641 if (!changed_relocs
)
2642 free (internal_relocs
);
2644 elf_section_data (sec
)->relocs
= internal_relocs
;
2650 if (contents
!= NULL
2651 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2653 if (internal_relocs
!= NULL
2654 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2655 free (internal_relocs
);
2659 /* Set the sizes of the dynamic sections. */
2662 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2664 struct elf_i386_link_hash_table
*htab
;
2670 htab
= elf_i386_hash_table (info
);
2673 dynobj
= htab
->elf
.dynobj
;
2677 if (htab
->elf
.dynamic_sections_created
)
2679 /* Set the contents of the .interp section to the interpreter. */
2680 if (info
->executable
)
2682 s
= bfd_get_linker_section (dynobj
, ".interp");
2685 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2686 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2690 /* Set up .got offsets for local syms, and space for local dynamic
2692 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2694 bfd_signed_vma
*local_got
;
2695 bfd_signed_vma
*end_local_got
;
2696 char *local_tls_type
;
2697 bfd_vma
*local_tlsdesc_gotent
;
2698 bfd_size_type locsymcount
;
2699 Elf_Internal_Shdr
*symtab_hdr
;
2702 if (! is_i386_elf (ibfd
))
2705 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2707 struct elf_dyn_relocs
*p
;
2709 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2712 for (p
= ((struct elf_dyn_relocs
*)
2713 elf_section_data (s
)->local_dynrel
);
2717 if (!bfd_is_abs_section (p
->sec
)
2718 && bfd_is_abs_section (p
->sec
->output_section
))
2720 /* Input section has been discarded, either because
2721 it is a copy of a linkonce section or due to
2722 linker script /DISCARD/, so we'll be discarding
2725 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2726 && strcmp (p
->sec
->output_section
->name
,
2729 /* Relocations in vxworks .tls_vars sections are
2730 handled specially by the loader. */
2732 else if (p
->count
!= 0)
2734 srel
= elf_section_data (p
->sec
)->sreloc
;
2735 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2736 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2737 && (info
->flags
& DF_TEXTREL
) == 0)
2739 info
->flags
|= DF_TEXTREL
;
2740 if (info
->warn_shared_textrel
&& info
->shared
)
2741 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2742 p
->sec
->owner
, p
->sec
);
2748 local_got
= elf_local_got_refcounts (ibfd
);
2752 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2753 locsymcount
= symtab_hdr
->sh_info
;
2754 end_local_got
= local_got
+ locsymcount
;
2755 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2756 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2758 srel
= htab
->elf
.srelgot
;
2759 for (; local_got
< end_local_got
;
2760 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2762 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2765 if (GOT_TLS_GDESC_P (*local_tls_type
))
2767 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2768 - elf_i386_compute_jump_table_size (htab
);
2769 htab
->elf
.sgotplt
->size
+= 8;
2770 *local_got
= (bfd_vma
) -2;
2772 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2773 || GOT_TLS_GD_P (*local_tls_type
))
2775 *local_got
= s
->size
;
2777 if (GOT_TLS_GD_P (*local_tls_type
)
2778 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2782 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2783 || (*local_tls_type
& GOT_TLS_IE
))
2785 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2786 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2787 else if (GOT_TLS_GD_P (*local_tls_type
)
2788 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2789 srel
->size
+= sizeof (Elf32_External_Rel
);
2790 if (GOT_TLS_GDESC_P (*local_tls_type
))
2791 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2795 *local_got
= (bfd_vma
) -1;
2799 if (htab
->tls_ldm_got
.refcount
> 0)
2801 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2803 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2804 htab
->elf
.sgot
->size
+= 8;
2805 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2808 htab
->tls_ldm_got
.offset
= -1;
2810 /* Allocate global sym .plt and .got entries, and space for global
2811 sym dynamic relocs. */
2812 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2814 /* Allocate .plt and .got entries, and space for local symbols. */
2815 htab_traverse (htab
->loc_hash_table
,
2816 elf_i386_allocate_local_dynrelocs
,
2819 /* For every jump slot reserved in the sgotplt, reloc_count is
2820 incremented. However, when we reserve space for TLS descriptors,
2821 it's not incremented, so in order to compute the space reserved
2822 for them, it suffices to multiply the reloc count by the jump
2825 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2826 so that R_386_IRELATIVE entries come last. */
2827 if (htab
->elf
.srelplt
)
2829 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2830 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2831 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2833 else if (htab
->elf
.irelplt
)
2834 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2837 if (htab
->elf
.sgotplt
)
2839 /* Don't allocate .got.plt section if there are no GOT nor PLT
2840 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2841 if ((htab
->elf
.hgot
== NULL
2842 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2843 && (htab
->elf
.sgotplt
->size
2844 == get_elf_backend_data (output_bfd
)->got_header_size
)
2845 && (htab
->elf
.splt
== NULL
2846 || htab
->elf
.splt
->size
== 0)
2847 && (htab
->elf
.sgot
== NULL
2848 || htab
->elf
.sgot
->size
== 0)
2849 && (htab
->elf
.iplt
== NULL
2850 || htab
->elf
.iplt
->size
== 0)
2851 && (htab
->elf
.igotplt
== NULL
2852 || htab
->elf
.igotplt
->size
== 0))
2853 htab
->elf
.sgotplt
->size
= 0;
2857 if (htab
->plt_eh_frame
!= NULL
2858 && htab
->elf
.splt
!= NULL
2859 && htab
->elf
.splt
->size
!= 0
2860 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2861 && _bfd_elf_eh_frame_present (info
))
2862 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2864 /* We now have determined the sizes of the various dynamic sections.
2865 Allocate memory for them. */
2867 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2869 bfd_boolean strip_section
= TRUE
;
2871 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2874 if (s
== htab
->elf
.splt
2875 || s
== htab
->elf
.sgot
)
2877 /* Strip this section if we don't need it; see the
2879 /* We'd like to strip these sections if they aren't needed, but if
2880 we've exported dynamic symbols from them we must leave them.
2881 It's too late to tell BFD to get rid of the symbols. */
2883 if (htab
->elf
.hplt
!= NULL
)
2884 strip_section
= FALSE
;
2886 else if (s
== htab
->elf
.sgotplt
2887 || s
== htab
->elf
.iplt
2888 || s
== htab
->elf
.igotplt
2889 || s
== htab
->plt_eh_frame
2890 || s
== htab
->sdynbss
)
2892 /* Strip these too. */
2894 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2897 && s
!= htab
->elf
.srelplt
2898 && s
!= htab
->srelplt2
)
2901 /* We use the reloc_count field as a counter if we need
2902 to copy relocs into the output file. */
2907 /* It's not one of our sections, so don't allocate space. */
2913 /* If we don't need this section, strip it from the
2914 output file. This is mostly to handle .rel.bss and
2915 .rel.plt. We must create both sections in
2916 create_dynamic_sections, because they must be created
2917 before the linker maps input sections to output
2918 sections. The linker does that before
2919 adjust_dynamic_symbol is called, and it is that
2920 function which decides whether anything needs to go
2921 into these sections. */
2923 s
->flags
|= SEC_EXCLUDE
;
2927 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2930 /* Allocate memory for the section contents. We use bfd_zalloc
2931 here in case unused entries are not reclaimed before the
2932 section's contents are written out. This should not happen,
2933 but this way if it does, we get a R_386_NONE reloc instead
2935 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2936 if (s
->contents
== NULL
)
2940 if (htab
->plt_eh_frame
!= NULL
2941 && htab
->plt_eh_frame
->contents
!= NULL
)
2943 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2944 sizeof (elf_i386_eh_frame_plt
));
2945 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2946 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2949 if (htab
->elf
.dynamic_sections_created
)
2951 /* Add some entries to the .dynamic section. We fill in the
2952 values later, in elf_i386_finish_dynamic_sections, but we
2953 must add the entries now so that we get the correct size for
2954 the .dynamic section. The DT_DEBUG entry is filled in by the
2955 dynamic linker and used by the debugger. */
2956 #define add_dynamic_entry(TAG, VAL) \
2957 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2959 if (info
->executable
)
2961 if (!add_dynamic_entry (DT_DEBUG
, 0))
2965 if (htab
->elf
.splt
->size
!= 0)
2967 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2968 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2969 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2970 || !add_dynamic_entry (DT_JMPREL
, 0))
2976 if (!add_dynamic_entry (DT_REL
, 0)
2977 || !add_dynamic_entry (DT_RELSZ
, 0)
2978 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2981 /* If any dynamic relocs apply to a read-only section,
2982 then we need a DT_TEXTREL entry. */
2983 if ((info
->flags
& DF_TEXTREL
) == 0)
2984 elf_link_hash_traverse (&htab
->elf
,
2985 elf_i386_readonly_dynrelocs
, info
);
2987 if ((info
->flags
& DF_TEXTREL
) != 0)
2989 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2993 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2994 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2997 #undef add_dynamic_entry
3003 elf_i386_always_size_sections (bfd
*output_bfd
,
3004 struct bfd_link_info
*info
)
3006 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3010 struct elf_link_hash_entry
*tlsbase
;
3012 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3013 "_TLS_MODULE_BASE_",
3014 FALSE
, FALSE
, FALSE
);
3016 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3018 struct elf_i386_link_hash_table
*htab
;
3019 struct bfd_link_hash_entry
*bh
= NULL
;
3020 const struct elf_backend_data
*bed
3021 = get_elf_backend_data (output_bfd
);
3023 htab
= elf_i386_hash_table (info
);
3027 if (!(_bfd_generic_link_add_one_symbol
3028 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3029 tls_sec
, 0, NULL
, FALSE
,
3030 bed
->collect
, &bh
)))
3033 htab
->tls_module_base
= bh
;
3035 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3036 tlsbase
->def_regular
= 1;
3037 tlsbase
->other
= STV_HIDDEN
;
3038 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3045 /* Set the correct type for an x86 ELF section. We do this by the
3046 section name, which is a hack, but ought to work. */
3049 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3050 Elf_Internal_Shdr
*hdr
,
3055 name
= bfd_get_section_name (abfd
, sec
);
3057 /* This is an ugly, but unfortunately necessary hack that is
3058 needed when producing EFI binaries on x86. It tells
3059 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3060 containing ELF relocation info. We need this hack in order to
3061 be able to generate ELF binaries that can be translated into
3062 EFI applications (which are essentially COFF objects). Those
3063 files contain a COFF ".reloc" section inside an ELFNN object,
3064 which would normally cause BFD to segfault because it would
3065 attempt to interpret this section as containing relocation
3066 entries for section "oc". With this hack enabled, ".reloc"
3067 will be treated as a normal data section, which will avoid the
3068 segfault. However, you won't be able to create an ELFNN binary
3069 with a section named "oc" that needs relocations, but that's
3070 the kind of ugly side-effects you get when detecting section
3071 types based on their names... In practice, this limitation is
3072 unlikely to bite. */
3073 if (strcmp (name
, ".reloc") == 0)
3074 hdr
->sh_type
= SHT_PROGBITS
;
3079 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3080 executables. Rather than setting it to the beginning of the TLS
3081 section, we have to set it to the end. This function may be called
3082 multiple times, it is idempotent. */
3085 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3087 struct elf_i386_link_hash_table
*htab
;
3088 struct bfd_link_hash_entry
*base
;
3090 if (!info
->executable
)
3093 htab
= elf_i386_hash_table (info
);
3097 base
= htab
->tls_module_base
;
3101 base
->u
.def
.value
= htab
->elf
.tls_size
;
3104 /* Return the base VMA address which should be subtracted from real addresses
3105 when resolving @dtpoff relocation.
3106 This is PT_TLS segment p_vaddr. */
3109 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3111 /* If tls_sec is NULL, we should have signalled an error already. */
3112 if (elf_hash_table (info
)->tls_sec
== NULL
)
3114 return elf_hash_table (info
)->tls_sec
->vma
;
3117 /* Return the relocation value for @tpoff relocation
3118 if STT_TLS virtual address is ADDRESS. */
3121 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3123 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3124 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3125 bfd_vma static_tls_size
;
3127 /* If tls_sec is NULL, we should have signalled an error already. */
3128 if (htab
->tls_sec
== NULL
)
3131 /* Consider special static TLS alignment requirements. */
3132 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3133 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3136 /* Relocate an i386 ELF section. */
3139 elf_i386_relocate_section (bfd
*output_bfd
,
3140 struct bfd_link_info
*info
,
3142 asection
*input_section
,
3144 Elf_Internal_Rela
*relocs
,
3145 Elf_Internal_Sym
*local_syms
,
3146 asection
**local_sections
)
3148 struct elf_i386_link_hash_table
*htab
;
3149 Elf_Internal_Shdr
*symtab_hdr
;
3150 struct elf_link_hash_entry
**sym_hashes
;
3151 bfd_vma
*local_got_offsets
;
3152 bfd_vma
*local_tlsdesc_gotents
;
3153 Elf_Internal_Rela
*rel
;
3154 Elf_Internal_Rela
*relend
;
3155 bfd_boolean is_vxworks_tls
;
3156 unsigned plt_entry_size
;
3158 BFD_ASSERT (is_i386_elf (input_bfd
));
3160 htab
= elf_i386_hash_table (info
);
3163 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3164 sym_hashes
= elf_sym_hashes (input_bfd
);
3165 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3166 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3167 /* We have to handle relocations in vxworks .tls_vars sections
3168 specially, because the dynamic loader is 'weird'. */
3169 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3171 && !strcmp (input_section
->output_section
->name
,
3174 elf_i386_set_tls_module_base (info
);
3176 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3179 relend
= relocs
+ input_section
->reloc_count
;
3180 for (; rel
< relend
; rel
++)
3182 unsigned int r_type
;
3183 reloc_howto_type
*howto
;
3184 unsigned long r_symndx
;
3185 struct elf_link_hash_entry
*h
;
3186 Elf_Internal_Sym
*sym
;
3188 bfd_vma off
, offplt
;
3190 bfd_boolean unresolved_reloc
;
3191 bfd_reloc_status_type r
;
3196 r_type
= ELF32_R_TYPE (rel
->r_info
);
3197 if (r_type
== R_386_GNU_VTINHERIT
3198 || r_type
== R_386_GNU_VTENTRY
)
3201 if ((indx
= r_type
) >= R_386_standard
3202 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3203 >= R_386_ext
- R_386_standard
)
3204 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3205 >= R_386_irelative
- R_386_ext
))
3207 (*_bfd_error_handler
)
3208 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3209 input_bfd
, input_section
, r_type
);
3210 bfd_set_error (bfd_error_bad_value
);
3213 howto
= elf_howto_table
+ indx
;
3215 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3219 unresolved_reloc
= FALSE
;
3220 if (r_symndx
< symtab_hdr
->sh_info
)
3222 sym
= local_syms
+ r_symndx
;
3223 sec
= local_sections
[r_symndx
];
3224 relocation
= (sec
->output_section
->vma
3225 + sec
->output_offset
3227 st_size
= sym
->st_size
;
3229 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3230 && ((sec
->flags
& SEC_MERGE
) != 0
3231 || (info
->relocatable
3232 && sec
->output_offset
!= 0)))
3235 bfd_byte
*where
= contents
+ rel
->r_offset
;
3237 switch (howto
->size
)
3240 addend
= bfd_get_8 (input_bfd
, where
);
3241 if (howto
->pc_relative
)
3243 addend
= (addend
^ 0x80) - 0x80;
3248 addend
= bfd_get_16 (input_bfd
, where
);
3249 if (howto
->pc_relative
)
3251 addend
= (addend
^ 0x8000) - 0x8000;
3256 addend
= bfd_get_32 (input_bfd
, where
);
3257 if (howto
->pc_relative
)
3259 addend
= (addend
^ 0x80000000) - 0x80000000;
3267 if (info
->relocatable
)
3268 addend
+= sec
->output_offset
;
3271 asection
*msec
= sec
;
3272 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3274 addend
-= relocation
;
3275 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3278 switch (howto
->size
)
3281 /* FIXME: overflow checks. */
3282 if (howto
->pc_relative
)
3284 bfd_put_8 (input_bfd
, addend
, where
);
3287 if (howto
->pc_relative
)
3289 bfd_put_16 (input_bfd
, addend
, where
);
3292 if (howto
->pc_relative
)
3294 bfd_put_32 (input_bfd
, addend
, where
);
3298 else if (!info
->relocatable
3299 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3301 /* Relocate against local STT_GNU_IFUNC symbol. */
3302 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3307 /* Set STT_GNU_IFUNC symbol value. */
3308 h
->root
.u
.def
.value
= sym
->st_value
;
3309 h
->root
.u
.def
.section
= sec
;
3314 bfd_boolean warned ATTRIBUTE_UNUSED
;
3315 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3317 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3318 r_symndx
, symtab_hdr
, sym_hashes
,
3320 unresolved_reloc
, warned
, ignored
);
3324 if (sec
!= NULL
&& discarded_section (sec
))
3325 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3326 rel
, 1, relend
, howto
, 0, contents
);
3328 if (info
->relocatable
)
3331 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3332 it here if it is defined in a non-shared object. */
3334 && h
->type
== STT_GNU_IFUNC
3337 asection
*plt
, *gotplt
, *base_got
;
3341 if ((input_section
->flags
& SEC_ALLOC
) == 0
3342 || h
->plt
.offset
== (bfd_vma
) -1)
3345 /* STT_GNU_IFUNC symbol must go through PLT. */
3346 if (htab
->elf
.splt
!= NULL
)
3348 plt
= htab
->elf
.splt
;
3349 gotplt
= htab
->elf
.sgotplt
;
3353 plt
= htab
->elf
.iplt
;
3354 gotplt
= htab
->elf
.igotplt
;
3357 relocation
= (plt
->output_section
->vma
3358 + plt
->output_offset
+ h
->plt
.offset
);
3363 if (h
->root
.root
.string
)
3364 name
= h
->root
.root
.string
;
3366 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3368 (*_bfd_error_handler
)
3369 (_("%B: relocation %s against STT_GNU_IFUNC "
3370 "symbol `%s' isn't handled by %s"), input_bfd
,
3371 elf_howto_table
[r_type
].name
,
3372 name
, __FUNCTION__
);
3373 bfd_set_error (bfd_error_bad_value
);
3377 /* Generate dynamic relcoation only when there is a
3378 non-GOT reference in a shared object. */
3379 if (info
->shared
&& h
->non_got_ref
)
3381 Elf_Internal_Rela outrel
;
3385 /* Need a dynamic relocation to get the real function
3387 offset
= _bfd_elf_section_offset (output_bfd
,
3391 if (offset
== (bfd_vma
) -1
3392 || offset
== (bfd_vma
) -2)
3395 outrel
.r_offset
= (input_section
->output_section
->vma
3396 + input_section
->output_offset
3399 if (h
->dynindx
== -1
3401 || info
->executable
)
3403 /* This symbol is resolved locally. */
3404 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3405 bfd_put_32 (output_bfd
,
3406 (h
->root
.u
.def
.value
3407 + h
->root
.u
.def
.section
->output_section
->vma
3408 + h
->root
.u
.def
.section
->output_offset
),
3412 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3414 sreloc
= htab
->elf
.irelifunc
;
3415 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3417 /* If this reloc is against an external symbol, we
3418 do not want to fiddle with the addend. Otherwise,
3419 we need to include the symbol value so that it
3420 becomes an addend for the dynamic reloc. For an
3421 internal symbol, we have updated addend. */
3430 base_got
= htab
->elf
.sgot
;
3431 off
= h
->got
.offset
;
3433 if (base_got
== NULL
)
3436 if (off
== (bfd_vma
) -1)
3438 /* We can't use h->got.offset here to save state, or
3439 even just remember the offset, as finish_dynamic_symbol
3440 would use that as offset into .got. */
3442 if (htab
->elf
.splt
!= NULL
)
3444 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3445 off
= (plt_index
+ 3) * 4;
3446 base_got
= htab
->elf
.sgotplt
;
3450 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3451 off
= plt_index
* 4;
3452 base_got
= htab
->elf
.igotplt
;
3455 if (h
->dynindx
== -1
3459 /* This references the local defitionion. We must
3460 initialize this entry in the global offset table.
3461 Since the offset must always be a multiple of 8,
3462 we use the least significant bit to record
3463 whether we have initialized it already.
3465 When doing a dynamic link, we create a .rela.got
3466 relocation entry to initialize the value. This
3467 is done in the finish_dynamic_symbol routine. */
3472 bfd_put_32 (output_bfd
, relocation
,
3473 base_got
->contents
+ off
);
3480 /* Adjust for static executables. */
3481 if (htab
->elf
.splt
== NULL
)
3482 relocation
+= gotplt
->output_offset
;
3486 relocation
= (base_got
->output_section
->vma
3487 + base_got
->output_offset
+ off
3488 - gotplt
->output_section
->vma
3489 - gotplt
->output_offset
);
3490 /* Adjust for static executables. */
3491 if (htab
->elf
.splt
== NULL
)
3492 relocation
+= gotplt
->output_offset
;
3498 relocation
-= (gotplt
->output_section
->vma
3499 + gotplt
->output_offset
);
3507 /* Relocation is to the entry for this symbol in the global
3509 if (htab
->elf
.sgot
== NULL
)
3516 off
= h
->got
.offset
;
3517 dyn
= htab
->elf
.dynamic_sections_created
;
3518 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3520 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3521 || (ELF_ST_VISIBILITY (h
->other
)
3522 && h
->root
.type
== bfd_link_hash_undefweak
))
3524 /* This is actually a static link, or it is a
3525 -Bsymbolic link and the symbol is defined
3526 locally, or the symbol was forced to be local
3527 because of a version file. We must initialize
3528 this entry in the global offset table. Since the
3529 offset must always be a multiple of 4, we use the
3530 least significant bit to record whether we have
3531 initialized it already.
3533 When doing a dynamic link, we create a .rel.got
3534 relocation entry to initialize the value. This
3535 is done in the finish_dynamic_symbol routine. */
3540 bfd_put_32 (output_bfd
, relocation
,
3541 htab
->elf
.sgot
->contents
+ off
);
3546 unresolved_reloc
= FALSE
;
3550 if (local_got_offsets
== NULL
)
3553 off
= local_got_offsets
[r_symndx
];
3555 /* The offset must always be a multiple of 4. We use
3556 the least significant bit to record whether we have
3557 already generated the necessary reloc. */
3562 bfd_put_32 (output_bfd
, relocation
,
3563 htab
->elf
.sgot
->contents
+ off
);
3568 Elf_Internal_Rela outrel
;
3570 s
= htab
->elf
.srelgot
;
3574 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3575 + htab
->elf
.sgot
->output_offset
3577 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3578 elf_append_rel (output_bfd
, s
, &outrel
);
3581 local_got_offsets
[r_symndx
] |= 1;
3585 if (off
>= (bfd_vma
) -2)
3588 relocation
= htab
->elf
.sgot
->output_section
->vma
3589 + htab
->elf
.sgot
->output_offset
+ off
3590 - htab
->elf
.sgotplt
->output_section
->vma
3591 - htab
->elf
.sgotplt
->output_offset
;
3595 /* Relocation is relative to the start of the global offset
3598 /* Check to make sure it isn't a protected function symbol
3599 for shared library since it may not be local when used
3600 as function address. We also need to make sure that a
3601 symbol is defined locally. */
3602 if (info
->shared
&& h
)
3604 if (!h
->def_regular
)
3608 switch (ELF_ST_VISIBILITY (h
->other
))
3611 v
= _("hidden symbol");
3614 v
= _("internal symbol");
3617 v
= _("protected symbol");
3624 (*_bfd_error_handler
)
3625 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3626 input_bfd
, v
, h
->root
.root
.string
);
3627 bfd_set_error (bfd_error_bad_value
);
3630 else if (!info
->executable
3631 && !SYMBOLIC_BIND (info
, h
)
3632 && h
->type
== STT_FUNC
3633 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3635 (*_bfd_error_handler
)
3636 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3637 input_bfd
, h
->root
.root
.string
);
3638 bfd_set_error (bfd_error_bad_value
);
3643 /* Note that sgot is not involved in this
3644 calculation. We always want the start of .got.plt. If we
3645 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3646 permitted by the ABI, we might have to change this
3648 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3649 + htab
->elf
.sgotplt
->output_offset
;
3653 /* Use global offset table as symbol value. */
3654 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3655 + htab
->elf
.sgotplt
->output_offset
;
3656 unresolved_reloc
= FALSE
;
3660 /* Relocation is to the entry for this symbol in the
3661 procedure linkage table. */
3663 /* Resolve a PLT32 reloc against a local symbol directly,
3664 without using the procedure linkage table. */
3668 if (h
->plt
.offset
== (bfd_vma
) -1
3669 || htab
->elf
.splt
== NULL
)
3671 /* We didn't make a PLT entry for this symbol. This
3672 happens when statically linking PIC code, or when
3673 using -Bsymbolic. */
3677 relocation
= (htab
->elf
.splt
->output_section
->vma
3678 + htab
->elf
.splt
->output_offset
3680 unresolved_reloc
= FALSE
;
3684 /* Set to symbol size. */
3685 relocation
= st_size
;
3690 if ((input_section
->flags
& SEC_ALLOC
) == 0
3696 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3697 || h
->root
.type
!= bfd_link_hash_undefweak
)
3698 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3699 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3700 || (ELIMINATE_COPY_RELOCS
3707 || h
->root
.type
== bfd_link_hash_undefweak
3708 || h
->root
.type
== bfd_link_hash_undefined
)))
3710 Elf_Internal_Rela outrel
;
3711 bfd_boolean skip
, relocate
;
3714 /* When generating a shared object, these relocations
3715 are copied into the output file to be resolved at run
3722 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3724 if (outrel
.r_offset
== (bfd_vma
) -1)
3726 else if (outrel
.r_offset
== (bfd_vma
) -2)
3727 skip
= TRUE
, relocate
= TRUE
;
3728 outrel
.r_offset
+= (input_section
->output_section
->vma
3729 + input_section
->output_offset
);
3732 memset (&outrel
, 0, sizeof outrel
);
3735 && (r_type
== R_386_PC32
3737 || !SYMBOLIC_BIND (info
, h
)
3738 || !h
->def_regular
))
3739 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3742 /* This symbol is local, or marked to become local. */
3744 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3747 sreloc
= elf_section_data (input_section
)->sreloc
;
3749 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3751 r
= bfd_reloc_notsupported
;
3752 goto check_relocation_error
;
3755 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3757 /* If this reloc is against an external symbol, we do
3758 not want to fiddle with the addend. Otherwise, we
3759 need to include the symbol value so that it becomes
3760 an addend for the dynamic reloc. */
3767 if (!info
->executable
)
3769 Elf_Internal_Rela outrel
;
3772 outrel
.r_offset
= rel
->r_offset
3773 + input_section
->output_section
->vma
3774 + input_section
->output_offset
;
3775 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3776 sreloc
= elf_section_data (input_section
)->sreloc
;
3779 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3784 case R_386_TLS_GOTDESC
:
3785 case R_386_TLS_DESC_CALL
:
3786 case R_386_TLS_IE_32
:
3787 case R_386_TLS_GOTIE
:
3788 tls_type
= GOT_UNKNOWN
;
3789 if (h
== NULL
&& local_got_offsets
)
3790 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3792 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3793 if (tls_type
== GOT_TLS_IE
)
3794 tls_type
= GOT_TLS_IE_NEG
;
3796 if (! elf_i386_tls_transition (info
, input_bfd
,
3797 input_section
, contents
,
3798 symtab_hdr
, sym_hashes
,
3799 &r_type
, tls_type
, rel
,
3800 relend
, h
, r_symndx
))
3803 if (r_type
== R_386_TLS_LE_32
)
3805 BFD_ASSERT (! unresolved_reloc
);
3806 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3811 /* GD->LE transition. */
3812 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3815 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3817 movl %gs:0, %eax; subl $foo@tpoff, %eax
3818 (6 byte form of subl). */
3819 memcpy (contents
+ rel
->r_offset
- 3,
3820 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3821 roff
= rel
->r_offset
+ 5;
3825 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3827 movl %gs:0, %eax; subl $foo@tpoff, %eax
3828 (6 byte form of subl). */
3829 memcpy (contents
+ rel
->r_offset
- 2,
3830 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3831 roff
= rel
->r_offset
+ 6;
3833 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3835 /* Skip R_386_PC32/R_386_PLT32. */
3839 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3841 /* GDesc -> LE transition.
3842 It's originally something like:
3843 leal x@tlsdesc(%ebx), %eax
3847 Registers other than %eax may be set up here. */
3852 roff
= rel
->r_offset
;
3853 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3855 /* Now modify the instruction as appropriate. */
3856 /* aoliva FIXME: remove the above and xor the byte
3858 bfd_put_8 (output_bfd
, val
^ 0x86,
3859 contents
+ roff
- 1);
3860 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3864 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3866 /* GDesc -> LE transition.
3874 roff
= rel
->r_offset
;
3875 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3876 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3879 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3883 /* IE->LE transition:
3884 Originally it can be one of:
3892 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3895 /* movl foo, %eax. */
3896 bfd_put_8 (output_bfd
, 0xb8,
3897 contents
+ rel
->r_offset
- 1);
3903 type
= bfd_get_8 (input_bfd
,
3904 contents
+ rel
->r_offset
- 2);
3909 bfd_put_8 (output_bfd
, 0xc7,
3910 contents
+ rel
->r_offset
- 2);
3911 bfd_put_8 (output_bfd
,
3912 0xc0 | ((val
>> 3) & 7),
3913 contents
+ rel
->r_offset
- 1);
3917 bfd_put_8 (output_bfd
, 0x81,
3918 contents
+ rel
->r_offset
- 2);
3919 bfd_put_8 (output_bfd
,
3920 0xc0 | ((val
>> 3) & 7),
3921 contents
+ rel
->r_offset
- 1);
3928 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3929 contents
+ rel
->r_offset
);
3934 unsigned int val
, type
;
3936 /* {IE_32,GOTIE}->LE transition:
3937 Originally it can be one of:
3938 subl foo(%reg1), %reg2
3939 movl foo(%reg1), %reg2
3940 addl foo(%reg1), %reg2
3943 movl $foo, %reg2 (6 byte form)
3944 addl $foo, %reg2. */
3945 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3946 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3950 bfd_put_8 (output_bfd
, 0xc7,
3951 contents
+ rel
->r_offset
- 2);
3952 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3953 contents
+ rel
->r_offset
- 1);
3955 else if (type
== 0x2b)
3958 bfd_put_8 (output_bfd
, 0x81,
3959 contents
+ rel
->r_offset
- 2);
3960 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3961 contents
+ rel
->r_offset
- 1);
3963 else if (type
== 0x03)
3966 bfd_put_8 (output_bfd
, 0x81,
3967 contents
+ rel
->r_offset
- 2);
3968 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3969 contents
+ rel
->r_offset
- 1);
3973 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3974 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3975 contents
+ rel
->r_offset
);
3977 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3978 contents
+ rel
->r_offset
);
3983 if (htab
->elf
.sgot
== NULL
)
3988 off
= h
->got
.offset
;
3989 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3993 if (local_got_offsets
== NULL
)
3996 off
= local_got_offsets
[r_symndx
];
3997 offplt
= local_tlsdesc_gotents
[r_symndx
];
4004 Elf_Internal_Rela outrel
;
4008 if (htab
->elf
.srelgot
== NULL
)
4011 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4013 if (GOT_TLS_GDESC_P (tls_type
))
4016 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4017 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4018 <= htab
->elf
.sgotplt
->size
);
4019 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4020 + htab
->elf
.sgotplt
->output_offset
4022 + htab
->sgotplt_jump_table_size
);
4023 sreloc
= htab
->elf
.srelplt
;
4024 loc
= sreloc
->contents
;
4025 loc
+= (htab
->next_tls_desc_index
++
4026 * sizeof (Elf32_External_Rel
));
4027 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4028 <= sreloc
->contents
+ sreloc
->size
);
4029 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4032 BFD_ASSERT (! unresolved_reloc
);
4033 bfd_put_32 (output_bfd
,
4034 relocation
- elf_i386_dtpoff_base (info
),
4035 htab
->elf
.sgotplt
->contents
+ offplt
4036 + htab
->sgotplt_jump_table_size
+ 4);
4040 bfd_put_32 (output_bfd
, 0,
4041 htab
->elf
.sgotplt
->contents
+ offplt
4042 + htab
->sgotplt_jump_table_size
+ 4);
4046 sreloc
= htab
->elf
.srelgot
;
4048 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4049 + htab
->elf
.sgot
->output_offset
+ off
);
4051 if (GOT_TLS_GD_P (tls_type
))
4052 dr_type
= R_386_TLS_DTPMOD32
;
4053 else if (GOT_TLS_GDESC_P (tls_type
))
4055 else if (tls_type
== GOT_TLS_IE_POS
)
4056 dr_type
= R_386_TLS_TPOFF
;
4058 dr_type
= R_386_TLS_TPOFF32
;
4060 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4061 bfd_put_32 (output_bfd
,
4062 relocation
- elf_i386_dtpoff_base (info
),
4063 htab
->elf
.sgot
->contents
+ off
);
4064 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4065 bfd_put_32 (output_bfd
,
4066 elf_i386_dtpoff_base (info
) - relocation
,
4067 htab
->elf
.sgot
->contents
+ off
);
4068 else if (dr_type
!= R_386_TLS_DESC
)
4069 bfd_put_32 (output_bfd
, 0,
4070 htab
->elf
.sgot
->contents
+ off
);
4071 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4073 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4075 if (GOT_TLS_GD_P (tls_type
))
4079 BFD_ASSERT (! unresolved_reloc
);
4080 bfd_put_32 (output_bfd
,
4081 relocation
- elf_i386_dtpoff_base (info
),
4082 htab
->elf
.sgot
->contents
+ off
+ 4);
4086 bfd_put_32 (output_bfd
, 0,
4087 htab
->elf
.sgot
->contents
+ off
+ 4);
4088 outrel
.r_info
= ELF32_R_INFO (indx
,
4089 R_386_TLS_DTPOFF32
);
4090 outrel
.r_offset
+= 4;
4091 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4094 else if (tls_type
== GOT_TLS_IE_BOTH
)
4096 bfd_put_32 (output_bfd
,
4098 ? relocation
- elf_i386_dtpoff_base (info
)
4100 htab
->elf
.sgot
->contents
+ off
+ 4);
4101 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4102 outrel
.r_offset
+= 4;
4103 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4110 local_got_offsets
[r_symndx
] |= 1;
4113 if (off
>= (bfd_vma
) -2
4114 && ! GOT_TLS_GDESC_P (tls_type
))
4116 if (r_type
== R_386_TLS_GOTDESC
4117 || r_type
== R_386_TLS_DESC_CALL
)
4119 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4120 unresolved_reloc
= FALSE
;
4122 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4124 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4125 + htab
->elf
.sgotplt
->output_offset
;
4126 relocation
= htab
->elf
.sgot
->output_section
->vma
4127 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4128 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4129 && tls_type
== GOT_TLS_IE_BOTH
)
4131 if (r_type
== R_386_TLS_IE
)
4132 relocation
+= g_o_t
;
4133 unresolved_reloc
= FALSE
;
4135 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4137 unsigned int val
, type
;
4140 /* GD->IE transition. */
4141 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4142 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4145 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4147 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4149 roff
= rel
->r_offset
- 3;
4153 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4155 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4156 roff
= rel
->r_offset
- 2;
4158 memcpy (contents
+ roff
,
4159 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4160 contents
[roff
+ 7] = 0x80 | (val
& 7);
4161 /* If foo is used only with foo@gotntpoff(%reg) and
4162 foo@indntpoff, but not with foo@gottpoff(%reg), change
4163 subl $foo@gottpoff(%reg), %eax
4165 addl $foo@gotntpoff(%reg), %eax. */
4166 if (tls_type
== GOT_TLS_IE_POS
)
4167 contents
[roff
+ 6] = 0x03;
4168 bfd_put_32 (output_bfd
,
4169 htab
->elf
.sgot
->output_section
->vma
4170 + htab
->elf
.sgot
->output_offset
+ off
4171 - htab
->elf
.sgotplt
->output_section
->vma
4172 - htab
->elf
.sgotplt
->output_offset
,
4173 contents
+ roff
+ 8);
4174 /* Skip R_386_PLT32. */
4178 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4180 /* GDesc -> IE transition.
4181 It's originally something like:
4182 leal x@tlsdesc(%ebx), %eax
4185 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4187 movl x@gottpoff(%ebx), %eax # before negl %eax
4189 Registers other than %eax may be set up here. */
4193 /* First, make sure it's a leal adding ebx to a 32-bit
4194 offset into any register, although it's probably
4195 almost always going to be eax. */
4196 roff
= rel
->r_offset
;
4198 /* Now modify the instruction as appropriate. */
4199 /* To turn a leal into a movl in the form we use it, it
4200 suffices to change the first byte from 0x8d to 0x8b.
4201 aoliva FIXME: should we decide to keep the leal, all
4202 we have to do is remove the statement below, and
4203 adjust the relaxation of R_386_TLS_DESC_CALL. */
4204 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4206 if (tls_type
== GOT_TLS_IE_BOTH
)
4209 bfd_put_32 (output_bfd
,
4210 htab
->elf
.sgot
->output_section
->vma
4211 + htab
->elf
.sgot
->output_offset
+ off
4212 - htab
->elf
.sgotplt
->output_section
->vma
4213 - htab
->elf
.sgotplt
->output_offset
,
4217 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4219 /* GDesc -> IE transition.
4227 depending on how we transformed the TLS_GOTDESC above.
4232 roff
= rel
->r_offset
;
4234 /* Now modify the instruction as appropriate. */
4235 if (tls_type
!= GOT_TLS_IE_NEG
)
4238 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4239 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4244 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4245 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4255 if (! elf_i386_tls_transition (info
, input_bfd
,
4256 input_section
, contents
,
4257 symtab_hdr
, sym_hashes
,
4258 &r_type
, GOT_UNKNOWN
, rel
,
4259 relend
, h
, r_symndx
))
4262 if (r_type
!= R_386_TLS_LDM
)
4264 /* LD->LE transition:
4265 leal foo(%reg), %eax; call ___tls_get_addr.
4267 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4268 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4269 memcpy (contents
+ rel
->r_offset
- 2,
4270 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4271 /* Skip R_386_PC32/R_386_PLT32. */
4276 if (htab
->elf
.sgot
== NULL
)
4279 off
= htab
->tls_ldm_got
.offset
;
4284 Elf_Internal_Rela outrel
;
4286 if (htab
->elf
.srelgot
== NULL
)
4289 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4290 + htab
->elf
.sgot
->output_offset
+ off
);
4292 bfd_put_32 (output_bfd
, 0,
4293 htab
->elf
.sgot
->contents
+ off
);
4294 bfd_put_32 (output_bfd
, 0,
4295 htab
->elf
.sgot
->contents
+ off
+ 4);
4296 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4297 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4298 htab
->tls_ldm_got
.offset
|= 1;
4300 relocation
= htab
->elf
.sgot
->output_section
->vma
4301 + htab
->elf
.sgot
->output_offset
+ off
4302 - htab
->elf
.sgotplt
->output_section
->vma
4303 - htab
->elf
.sgotplt
->output_offset
;
4304 unresolved_reloc
= FALSE
;
4307 case R_386_TLS_LDO_32
:
4308 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4309 relocation
-= elf_i386_dtpoff_base (info
);
4311 /* When converting LDO to LE, we must negate. */
4312 relocation
= -elf_i386_tpoff (info
, relocation
);
4315 case R_386_TLS_LE_32
:
4317 if (!info
->executable
)
4319 Elf_Internal_Rela outrel
;
4322 outrel
.r_offset
= rel
->r_offset
4323 + input_section
->output_section
->vma
4324 + input_section
->output_offset
;
4325 if (h
!= NULL
&& h
->dynindx
!= -1)
4329 if (r_type
== R_386_TLS_LE_32
)
4330 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4332 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4333 sreloc
= elf_section_data (input_section
)->sreloc
;
4336 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4339 else if (r_type
== R_386_TLS_LE_32
)
4340 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4342 relocation
-= elf_i386_dtpoff_base (info
);
4344 else if (r_type
== R_386_TLS_LE_32
)
4345 relocation
= elf_i386_tpoff (info
, relocation
);
4347 relocation
= -elf_i386_tpoff (info
, relocation
);
4354 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4355 because such sections are not SEC_ALLOC and thus ld.so will
4356 not process them. */
4357 if (unresolved_reloc
4358 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4360 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4361 rel
->r_offset
) != (bfd_vma
) -1)
4363 (*_bfd_error_handler
)
4364 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4367 (long) rel
->r_offset
,
4369 h
->root
.root
.string
);
4374 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4375 contents
, rel
->r_offset
,
4378 check_relocation_error
:
4379 if (r
!= bfd_reloc_ok
)
4384 name
= h
->root
.root
.string
;
4387 name
= bfd_elf_string_from_elf_section (input_bfd
,
4388 symtab_hdr
->sh_link
,
4393 name
= bfd_section_name (input_bfd
, sec
);
4396 if (r
== bfd_reloc_overflow
)
4398 if (! ((*info
->callbacks
->reloc_overflow
)
4399 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4400 (bfd_vma
) 0, input_bfd
, input_section
,
4406 (*_bfd_error_handler
)
4407 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4408 input_bfd
, input_section
,
4409 (long) rel
->r_offset
, name
, (int) r
);
4418 /* Finish up dynamic symbol handling. We set the contents of various
4419 dynamic sections here. */
4422 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4423 struct bfd_link_info
*info
,
4424 struct elf_link_hash_entry
*h
,
4425 Elf_Internal_Sym
*sym
)
4427 struct elf_i386_link_hash_table
*htab
;
4428 unsigned plt_entry_size
;
4429 const struct elf_i386_backend_data
*abed
;
4431 htab
= elf_i386_hash_table (info
);
4435 abed
= get_elf_i386_backend_data (output_bfd
);
4436 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4438 if (h
->plt
.offset
!= (bfd_vma
) -1)
4442 Elf_Internal_Rela rel
;
4444 asection
*plt
, *gotplt
, *relplt
;
4446 /* When building a static executable, use .iplt, .igot.plt and
4447 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4448 if (htab
->elf
.splt
!= NULL
)
4450 plt
= htab
->elf
.splt
;
4451 gotplt
= htab
->elf
.sgotplt
;
4452 relplt
= htab
->elf
.srelplt
;
4456 plt
= htab
->elf
.iplt
;
4457 gotplt
= htab
->elf
.igotplt
;
4458 relplt
= htab
->elf
.irelplt
;
4461 /* This symbol has an entry in the procedure linkage table. Set
4464 if ((h
->dynindx
== -1
4465 && !((h
->forced_local
|| info
->executable
)
4467 && h
->type
== STT_GNU_IFUNC
))
4473 /* Get the index in the procedure linkage table which
4474 corresponds to this symbol. This is the index of this symbol
4475 in all the symbols for which we are making plt entries. The
4476 first entry in the procedure linkage table is reserved.
4478 Get the offset into the .got table of the entry that
4479 corresponds to this function. Each .got entry is 4 bytes.
4480 The first three are reserved.
4482 For static executables, we don't reserve anything. */
4484 if (plt
== htab
->elf
.splt
)
4486 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4487 got_offset
= (got_offset
+ 3) * 4;
4491 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4492 got_offset
= got_offset
* 4;
4495 /* Fill in the entry in the procedure linkage table. */
4498 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4499 abed
->plt
->plt_entry_size
);
4500 bfd_put_32 (output_bfd
,
4501 (gotplt
->output_section
->vma
4502 + gotplt
->output_offset
4504 plt
->contents
+ h
->plt
.offset
4505 + abed
->plt
->plt_got_offset
);
4507 if (abed
->is_vxworks
)
4509 int s
, k
, reloc_index
;
4511 /* Create the R_386_32 relocation referencing the GOT
4512 for this PLT entry. */
4514 /* S: Current slot number (zero-based). */
4515 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4516 / abed
->plt
->plt_entry_size
);
4517 /* K: Number of relocations for PLTResolve. */
4519 k
= PLTRESOLVE_RELOCS_SHLIB
;
4521 k
= PLTRESOLVE_RELOCS
;
4522 /* Skip the PLTresolve relocations, and the relocations for
4523 the other PLT slots. */
4524 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4525 loc
= (htab
->srelplt2
->contents
+ reloc_index
4526 * sizeof (Elf32_External_Rel
));
4528 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4529 + htab
->elf
.splt
->output_offset
4530 + h
->plt
.offset
+ 2),
4531 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4532 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4534 /* Create the R_386_32 relocation referencing the beginning of
4535 the PLT for this GOT entry. */
4536 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4537 + htab
->elf
.sgotplt
->output_offset
4539 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4540 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4541 loc
+ sizeof (Elf32_External_Rel
));
4546 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4547 abed
->plt
->plt_entry_size
);
4548 bfd_put_32 (output_bfd
, got_offset
,
4549 plt
->contents
+ h
->plt
.offset
4550 + abed
->plt
->plt_got_offset
);
4553 /* Fill in the entry in the global offset table. */
4554 bfd_put_32 (output_bfd
,
4555 (plt
->output_section
->vma
4556 + plt
->output_offset
4558 + abed
->plt
->plt_lazy_offset
),
4559 gotplt
->contents
+ got_offset
);
4561 /* Fill in the entry in the .rel.plt section. */
4562 rel
.r_offset
= (gotplt
->output_section
->vma
4563 + gotplt
->output_offset
4565 if (h
->dynindx
== -1
4566 || ((info
->executable
4567 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4569 && h
->type
== STT_GNU_IFUNC
))
4571 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4572 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4573 in the .got.plt section. */
4574 bfd_put_32 (output_bfd
,
4575 (h
->root
.u
.def
.value
4576 + h
->root
.u
.def
.section
->output_section
->vma
4577 + h
->root
.u
.def
.section
->output_offset
),
4578 gotplt
->contents
+ got_offset
);
4579 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4580 /* R_386_IRELATIVE comes last. */
4581 plt_index
= htab
->next_irelative_index
--;
4585 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4586 plt_index
= htab
->next_jump_slot_index
++;
4588 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4589 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4591 /* Don't fill PLT entry for static executables. */
4592 if (plt
== htab
->elf
.splt
)
4594 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4595 plt
->contents
+ h
->plt
.offset
4596 + abed
->plt
->plt_reloc_offset
);
4597 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4598 + abed
->plt
->plt_plt_offset
+ 4),
4599 plt
->contents
+ h
->plt
.offset
4600 + abed
->plt
->plt_plt_offset
);
4603 if (!h
->def_regular
)
4605 /* Mark the symbol as undefined, rather than as defined in
4606 the .plt section. Leave the value if there were any
4607 relocations where pointer equality matters (this is a clue
4608 for the dynamic linker, to make function pointer
4609 comparisons work between an application and shared
4610 library), otherwise set it to zero. If a function is only
4611 called from a binary, there is no need to slow down
4612 shared libraries because of that. */
4613 sym
->st_shndx
= SHN_UNDEF
;
4614 if (!h
->pointer_equality_needed
)
4619 if (h
->got
.offset
!= (bfd_vma
) -1
4620 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4621 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4623 Elf_Internal_Rela rel
;
4625 /* This symbol has an entry in the global offset table. Set it
4628 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4631 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4632 + htab
->elf
.sgot
->output_offset
4633 + (h
->got
.offset
& ~(bfd_vma
) 1));
4635 /* If this is a static link, or it is a -Bsymbolic link and the
4636 symbol is defined locally or was forced to be local because
4637 of a version file, we just want to emit a RELATIVE reloc.
4638 The entry in the global offset table will already have been
4639 initialized in the relocate_section function. */
4641 && h
->type
== STT_GNU_IFUNC
)
4645 /* Generate R_386_GLOB_DAT. */
4652 if (!h
->pointer_equality_needed
)
4655 /* For non-shared object, we can't use .got.plt, which
4656 contains the real function addres if we need pointer
4657 equality. We load the GOT entry with the PLT entry. */
4658 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4659 bfd_put_32 (output_bfd
,
4660 (plt
->output_section
->vma
4661 + plt
->output_offset
+ h
->plt
.offset
),
4662 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4666 else if (info
->shared
4667 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4669 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4670 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4674 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4676 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4677 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4678 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4681 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4686 Elf_Internal_Rela rel
;
4688 /* This symbol needs a copy reloc. Set it up. */
4690 if (h
->dynindx
== -1
4691 || (h
->root
.type
!= bfd_link_hash_defined
4692 && h
->root
.type
!= bfd_link_hash_defweak
)
4693 || htab
->srelbss
== NULL
)
4696 rel
.r_offset
= (h
->root
.u
.def
.value
4697 + h
->root
.u
.def
.section
->output_section
->vma
4698 + h
->root
.u
.def
.section
->output_offset
);
4699 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4700 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4706 /* Finish up local dynamic symbol handling. We set the contents of
4707 various dynamic sections here. */
4710 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4712 struct elf_link_hash_entry
*h
4713 = (struct elf_link_hash_entry
*) *slot
;
4714 struct bfd_link_info
*info
4715 = (struct bfd_link_info
*) inf
;
4717 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4721 /* Used to decide how to sort relocs in an optimal manner for the
4722 dynamic linker, before writing them out. */
4724 static enum elf_reloc_type_class
4725 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4726 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4727 const Elf_Internal_Rela
*rela
)
4729 switch (ELF32_R_TYPE (rela
->r_info
))
4731 case R_386_RELATIVE
:
4732 return reloc_class_relative
;
4733 case R_386_JUMP_SLOT
:
4734 return reloc_class_plt
;
4736 return reloc_class_copy
;
4738 return reloc_class_normal
;
4742 /* Finish up the dynamic sections. */
4745 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4746 struct bfd_link_info
*info
)
4748 struct elf_i386_link_hash_table
*htab
;
4751 const struct elf_i386_backend_data
*abed
;
4753 htab
= elf_i386_hash_table (info
);
4757 dynobj
= htab
->elf
.dynobj
;
4758 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4759 abed
= get_elf_i386_backend_data (output_bfd
);
4761 if (htab
->elf
.dynamic_sections_created
)
4763 Elf32_External_Dyn
*dyncon
, *dynconend
;
4765 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4768 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4769 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4770 for (; dyncon
< dynconend
; dyncon
++)
4772 Elf_Internal_Dyn dyn
;
4775 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4780 if (abed
->is_vxworks
4781 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4786 s
= htab
->elf
.sgotplt
;
4787 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4791 s
= htab
->elf
.srelplt
;
4792 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4796 s
= htab
->elf
.srelplt
;
4797 dyn
.d_un
.d_val
= s
->size
;
4801 /* My reading of the SVR4 ABI indicates that the
4802 procedure linkage table relocs (DT_JMPREL) should be
4803 included in the overall relocs (DT_REL). This is
4804 what Solaris does. However, UnixWare can not handle
4805 that case. Therefore, we override the DT_RELSZ entry
4806 here to make it not include the JMPREL relocs. */
4807 s
= htab
->elf
.srelplt
;
4810 dyn
.d_un
.d_val
-= s
->size
;
4814 /* We may not be using the standard ELF linker script.
4815 If .rel.plt is the first .rel section, we adjust
4816 DT_REL to not include it. */
4817 s
= htab
->elf
.srelplt
;
4820 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4822 dyn
.d_un
.d_ptr
+= s
->size
;
4826 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4829 /* Fill in the first entry in the procedure linkage table. */
4830 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4834 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4835 abed
->plt
->plt0_entry_size
);
4836 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4837 abed
->plt0_pad_byte
,
4838 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4842 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4843 abed
->plt
->plt0_entry_size
);
4844 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4845 abed
->plt0_pad_byte
,
4846 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4847 bfd_put_32 (output_bfd
,
4848 (htab
->elf
.sgotplt
->output_section
->vma
4849 + htab
->elf
.sgotplt
->output_offset
4851 htab
->elf
.splt
->contents
4852 + abed
->plt
->plt0_got1_offset
);
4853 bfd_put_32 (output_bfd
,
4854 (htab
->elf
.sgotplt
->output_section
->vma
4855 + htab
->elf
.sgotplt
->output_offset
4857 htab
->elf
.splt
->contents
4858 + abed
->plt
->plt0_got2_offset
);
4860 if (abed
->is_vxworks
)
4862 Elf_Internal_Rela rel
;
4864 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4865 On IA32 we use REL relocations so the addend goes in
4866 the PLT directly. */
4867 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4868 + htab
->elf
.splt
->output_offset
4869 + abed
->plt
->plt0_got1_offset
);
4870 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4871 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4872 htab
->srelplt2
->contents
);
4873 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4874 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4875 + htab
->elf
.splt
->output_offset
4876 + abed
->plt
->plt0_got2_offset
);
4877 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4878 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4879 htab
->srelplt2
->contents
+
4880 sizeof (Elf32_External_Rel
));
4884 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4885 really seem like the right value. */
4886 elf_section_data (htab
->elf
.splt
->output_section
)
4887 ->this_hdr
.sh_entsize
= 4;
4889 /* Correct the .rel.plt.unloaded relocations. */
4890 if (abed
->is_vxworks
&& !info
->shared
)
4892 int num_plts
= (htab
->elf
.splt
->size
4893 / abed
->plt
->plt_entry_size
) - 1;
4896 p
= htab
->srelplt2
->contents
;
4898 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4900 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4902 for (; num_plts
; num_plts
--)
4904 Elf_Internal_Rela rel
;
4905 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4906 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4907 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4908 p
+= sizeof (Elf32_External_Rel
);
4910 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4911 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4912 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4913 p
+= sizeof (Elf32_External_Rel
);
4919 if (htab
->elf
.sgotplt
)
4921 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4923 (*_bfd_error_handler
)
4924 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4928 /* Fill in the first three entries in the global offset table. */
4929 if (htab
->elf
.sgotplt
->size
> 0)
4931 bfd_put_32 (output_bfd
,
4933 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4934 htab
->elf
.sgotplt
->contents
);
4935 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4936 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4939 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4942 /* Adjust .eh_frame for .plt section. */
4943 if (htab
->plt_eh_frame
!= NULL
4944 && htab
->plt_eh_frame
->contents
!= NULL
)
4946 if (htab
->elf
.splt
!= NULL
4947 && htab
->elf
.splt
->size
!= 0
4948 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4949 && htab
->elf
.splt
->output_section
!= NULL
4950 && htab
->plt_eh_frame
->output_section
!= NULL
)
4952 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4953 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4954 + htab
->plt_eh_frame
->output_offset
4955 + PLT_FDE_START_OFFSET
;
4956 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4957 htab
->plt_eh_frame
->contents
4958 + PLT_FDE_START_OFFSET
);
4960 if (htab
->plt_eh_frame
->sec_info_type
4961 == SEC_INFO_TYPE_EH_FRAME
)
4963 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4965 htab
->plt_eh_frame
->contents
))
4970 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4971 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4973 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4974 htab_traverse (htab
->loc_hash_table
,
4975 elf_i386_finish_local_dynamic_symbol
,
4981 /* Return address in section PLT for the Ith GOTPLT relocation, for
4982 relocation REL or (bfd_vma) -1 if it should not be included. */
4985 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
, const arelent
*rel
)
4988 const struct elf_i386_backend_data
*bed
;
4991 /* Only match R_386_JUMP_SLOT and R_386_IRELATIVE. */
4992 if (rel
->howto
->type
!= R_386_JUMP_SLOT
4993 && rel
->howto
->type
!= R_386_IRELATIVE
)
4994 return (bfd_vma
) -1;
4997 bed
= get_elf_i386_backend_data (abfd
);
4998 plt_offset
= bed
->plt
->plt_entry_size
;
5000 if (elf_elfheader (abfd
)->e_ident
[EI_OSABI
] != ELFOSABI_GNU
)
5001 return plt
->vma
+ (i
+ 1) * plt_offset
;
5003 while (plt_offset
< plt
->size
)
5005 bfd_vma reloc_offset
;
5006 bfd_byte reloc_offset_raw
[4];
5008 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5010 plt_offset
+ bed
->plt
->plt_reloc_offset
,
5011 sizeof (reloc_offset_raw
)))
5012 return (bfd_vma
) -1;
5014 reloc_offset
= H_GET_32 (abfd
, reloc_offset_raw
);
5015 if (reloc_offset
== i
* sizeof (Elf32_External_Rel
))
5016 return plt
->vma
+ plt_offset
;
5017 plt_offset
+= bed
->plt
->plt_entry_size
;
5023 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5026 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5028 if (h
->plt
.offset
!= (bfd_vma
) -1
5030 && !h
->pointer_equality_needed
)
5033 return _bfd_elf_hash_symbol (h
);
5036 /* Hook called by the linker routine which adds symbols from an object
5040 elf_i386_add_symbol_hook (bfd
* abfd
,
5041 struct bfd_link_info
* info
,
5042 Elf_Internal_Sym
* sym
,
5043 const char ** namep ATTRIBUTE_UNUSED
,
5044 flagword
* flagsp ATTRIBUTE_UNUSED
,
5045 asection
** secp ATTRIBUTE_UNUSED
,
5046 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5048 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5049 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5050 && (abfd
->flags
& DYNAMIC
) == 0
5051 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5052 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5057 #define TARGET_LITTLE_SYM i386_elf32_vec
5058 #define TARGET_LITTLE_NAME "elf32-i386"
5059 #define ELF_ARCH bfd_arch_i386
5060 #define ELF_TARGET_ID I386_ELF_DATA
5061 #define ELF_MACHINE_CODE EM_386
5062 #define ELF_MAXPAGESIZE 0x1000
5064 #define elf_backend_can_gc_sections 1
5065 #define elf_backend_can_refcount 1
5066 #define elf_backend_want_got_plt 1
5067 #define elf_backend_plt_readonly 1
5068 #define elf_backend_want_plt_sym 0
5069 #define elf_backend_got_header_size 12
5070 #define elf_backend_plt_alignment 4
5072 /* Support RELA for objdump of prelink objects. */
5073 #define elf_info_to_howto elf_i386_info_to_howto_rel
5074 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5076 #define bfd_elf32_mkobject elf_i386_mkobject
5078 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5079 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5080 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5081 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5083 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5084 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5085 #define elf_backend_check_relocs elf_i386_check_relocs
5086 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5087 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5088 #define elf_backend_fake_sections elf_i386_fake_sections
5089 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5090 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5091 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5092 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5093 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5094 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5095 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5096 #define elf_backend_relocate_section elf_i386_relocate_section
5097 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5098 #define elf_backend_always_size_sections elf_i386_always_size_sections
5099 #define elf_backend_omit_section_dynsym \
5100 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5101 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5102 #define elf_backend_hash_symbol elf_i386_hash_symbol
5103 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5105 #include "elf32-target.h"
5107 /* FreeBSD support. */
5109 #undef TARGET_LITTLE_SYM
5110 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5111 #undef TARGET_LITTLE_NAME
5112 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5114 #define ELF_OSABI ELFOSABI_FREEBSD
5116 /* The kernel recognizes executables as valid only if they carry a
5117 "FreeBSD" label in the ELF header. So we put this label on all
5118 executables and (for simplicity) also all other object files. */
5121 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5123 _bfd_elf_post_process_headers (abfd
, info
);
5125 #ifdef OLD_FREEBSD_ABI_LABEL
5127 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5128 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5129 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5134 #undef elf_backend_post_process_headers
5135 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5137 #define elf32_bed elf32_i386_fbsd_bed
5139 #undef elf_backend_add_symbol_hook
5141 #include "elf32-target.h"
5145 #undef TARGET_LITTLE_SYM
5146 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5147 #undef TARGET_LITTLE_NAME
5148 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5150 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5151 objects won't be recognized. */
5155 #define elf32_bed elf32_i386_sol2_bed
5157 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5159 #undef elf_backend_static_tls_alignment
5160 #define elf_backend_static_tls_alignment 8
5162 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5164 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5166 #undef elf_backend_want_plt_sym
5167 #define elf_backend_want_plt_sym 1
5169 #include "elf32-target.h"
5171 /* Native Client support. */
5173 #undef TARGET_LITTLE_SYM
5174 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5175 #undef TARGET_LITTLE_NAME
5176 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5178 #define elf32_bed elf32_i386_nacl_bed
5180 #undef ELF_MAXPAGESIZE
5181 #define ELF_MAXPAGESIZE 0x10000
5183 /* Restore defaults. */
5185 #undef elf_backend_want_plt_sym
5186 #define elf_backend_want_plt_sym 0
5187 #undef elf_backend_post_process_headers
5188 #undef elf_backend_static_tls_alignment
5190 /* NaCl uses substantially different PLT entries for the same effects. */
5192 #undef elf_backend_plt_alignment
5193 #define elf_backend_plt_alignment 5
5194 #define NACL_PLT_ENTRY_SIZE 64
5195 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5197 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5199 0xff, 0x35, /* pushl contents of address */
5200 0, 0, 0, 0, /* replaced with address of .got + 4. */
5201 0x8b, 0x0d, /* movl contents of address, %ecx */
5202 0, 0, 0, 0, /* replaced with address of .got + 8. */
5203 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5204 0xff, 0xe1 /* jmp *%ecx */
5207 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5209 0x8b, 0x0d, /* movl contents of address, %ecx */
5210 0, 0, 0, 0, /* replaced with GOT slot address. */
5211 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5212 0xff, 0xe1, /* jmp *%ecx */
5214 /* Pad to the next 32-byte boundary with nop instructions. */
5216 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5217 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5219 /* Lazy GOT entries point here (32-byte aligned). */
5220 0x68, /* pushl immediate */
5221 0, 0, 0, 0, /* replaced with reloc offset. */
5222 0xe9, /* jmp relative */
5223 0, 0, 0, 0, /* replaced with offset to .plt. */
5225 /* Pad to the next 32-byte boundary with nop instructions. */
5226 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5227 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5231 static const bfd_byte
5232 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5234 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5235 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5236 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5237 0xff, 0xe1, /* jmp *%ecx */
5239 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5240 so pad to that size with nop instructions. */
5241 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5244 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5246 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5247 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5248 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5249 0xff, 0xe1, /* jmp *%ecx */
5251 /* Pad to the next 32-byte boundary with nop instructions. */
5253 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5254 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5256 /* Lazy GOT entries point here (32-byte aligned). */
5257 0x68, /* pushl immediate */
5258 0, 0, 0, 0, /* replaced with offset into relocation table. */
5259 0xe9, /* jmp relative */
5260 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5262 /* Pad to the next 32-byte boundary with nop instructions. */
5263 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5264 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5268 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5270 #if (PLT_CIE_LENGTH != 20 \
5271 || PLT_FDE_LENGTH != 36 \
5272 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5273 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5274 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5276 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5277 0, 0, 0, 0, /* CIE ID */
5278 1, /* CIE version */
5279 'z', 'R', 0, /* Augmentation string */
5280 1, /* Code alignment factor */
5281 0x7c, /* Data alignment factor: -4 */
5282 8, /* Return address column */
5283 1, /* Augmentation size */
5284 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5285 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5286 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5287 DW_CFA_nop
, DW_CFA_nop
,
5289 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5290 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5291 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5292 0, 0, 0, 0, /* .plt size goes here */
5293 0, /* Augmentation size */
5294 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5295 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5296 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5297 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5298 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5299 13, /* Block length */
5300 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5301 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5302 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5303 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5304 DW_CFA_nop
, DW_CFA_nop
5307 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5309 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5310 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5311 2, /* plt0_got1_offset */
5312 8, /* plt0_got2_offset */
5313 elf_i386_nacl_plt_entry
, /* plt_entry */
5314 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5315 2, /* plt_got_offset */
5316 33, /* plt_reloc_offset */
5317 38, /* plt_plt_offset */
5318 32, /* plt_lazy_offset */
5319 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5320 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5321 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5322 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5325 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5327 &elf_i386_nacl_plt
, /* plt */
5328 0x90, /* plt0_pad_byte: nop insn */
5333 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5335 /* Set the right machine number for a NaCl i386 ELF32 file. */
5336 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5340 #undef elf_backend_arch_data
5341 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5343 #undef elf_backend_object_p
5344 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5345 #undef elf_backend_modify_segment_map
5346 #define elf_backend_modify_segment_map nacl_modify_segment_map
5347 #undef elf_backend_modify_program_headers
5348 #define elf_backend_modify_program_headers nacl_modify_program_headers
5349 #undef elf_backend_final_write_processing
5350 #define elf_backend_final_write_processing nacl_final_write_processing
5352 #include "elf32-target.h"
5354 /* Restore defaults. */
5355 #undef elf_backend_object_p
5356 #undef elf_backend_modify_segment_map
5357 #undef elf_backend_modify_program_headers
5358 #undef elf_backend_final_write_processing
5360 /* VxWorks support. */
5362 #undef TARGET_LITTLE_SYM
5363 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5364 #undef TARGET_LITTLE_NAME
5365 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5367 #undef elf_backend_plt_alignment
5368 #define elf_backend_plt_alignment 4
5370 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5372 &elf_i386_plt
, /* plt */
5373 0x90, /* plt0_pad_byte */
5377 #undef elf_backend_arch_data
5378 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5380 #undef elf_backend_relocs_compatible
5381 #undef elf_backend_add_symbol_hook
5382 #define elf_backend_add_symbol_hook \
5383 elf_vxworks_add_symbol_hook
5384 #undef elf_backend_link_output_symbol_hook
5385 #define elf_backend_link_output_symbol_hook \
5386 elf_vxworks_link_output_symbol_hook
5387 #undef elf_backend_emit_relocs
5388 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5389 #undef elf_backend_final_write_processing
5390 #define elf_backend_final_write_processing \
5391 elf_vxworks_final_write_processing
5392 #undef elf_backend_static_tls_alignment
5394 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5396 #undef elf_backend_want_plt_sym
5397 #define elf_backend_want_plt_sym 1
5400 #define elf32_bed elf32_i386_vxworks_bed
5402 #include "elf32-target.h"