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 /* Entries in the GOT procedure linkage table look like this. */
585 static const bfd_byte elf_i386_got_plt_entry
[8] =
587 0xff, 0x25, /* jmp indirect */
588 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
589 0x66, 0x90 /* xchg %ax,%ax */
592 /* Entries in the PIC GOT procedure linkage table look like this. */
594 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
596 0xff, 0xa3, /* jmp *offset(%ebx) */
597 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
598 0x66, 0x90 /* xchg %ax,%ax */
601 /* .eh_frame covering the .plt section. */
603 static const bfd_byte elf_i386_eh_frame_plt
[] =
605 #define PLT_CIE_LENGTH 20
606 #define PLT_FDE_LENGTH 36
607 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
608 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
609 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
610 0, 0, 0, 0, /* CIE ID */
612 'z', 'R', 0, /* Augmentation string */
613 1, /* Code alignment factor */
614 0x7c, /* Data alignment factor */
615 8, /* Return address column */
616 1, /* Augmentation size */
617 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
618 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
619 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
620 DW_CFA_nop
, DW_CFA_nop
,
622 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
623 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
624 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
625 0, 0, 0, 0, /* .plt size goes here */
626 0, /* Augmentation size */
627 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
628 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
629 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
630 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
631 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
632 11, /* Block length */
633 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
634 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
635 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
636 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
637 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
640 struct elf_i386_plt_layout
642 /* The first entry in an absolute procedure linkage table looks like this. */
643 const bfd_byte
*plt0_entry
;
644 unsigned int plt0_entry_size
;
646 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
647 unsigned int plt0_got1_offset
;
648 unsigned int plt0_got2_offset
;
650 /* Later entries in an absolute procedure linkage table look like this. */
651 const bfd_byte
*plt_entry
;
652 unsigned int plt_entry_size
;
654 /* Offsets into plt_entry that are to be replaced with... */
655 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
656 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
657 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
659 /* Offset into plt_entry where the initial value of the GOT entry points. */
660 unsigned int plt_lazy_offset
;
662 /* The first entry in a PIC procedure linkage table looks like this. */
663 const bfd_byte
*pic_plt0_entry
;
665 /* Subsequent entries in a PIC procedure linkage table look like this. */
666 const bfd_byte
*pic_plt_entry
;
668 /* .eh_frame covering the .plt section. */
669 const bfd_byte
*eh_frame_plt
;
670 unsigned int eh_frame_plt_size
;
673 #define GET_PLT_ENTRY_SIZE(abfd) \
674 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
676 /* These are the standard parameters. */
677 static const struct elf_i386_plt_layout elf_i386_plt
=
679 elf_i386_plt0_entry
, /* plt0_entry */
680 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
681 2, /* plt0_got1_offset */
682 8, /* plt0_got2_offset */
683 elf_i386_plt_entry
, /* plt_entry */
684 PLT_ENTRY_SIZE
, /* plt_entry_size */
685 2, /* plt_got_offset */
686 7, /* plt_reloc_offset */
687 12, /* plt_plt_offset */
688 6, /* plt_lazy_offset */
689 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
690 elf_i386_pic_plt_entry
, /* pic_plt_entry */
691 elf_i386_eh_frame_plt
, /* eh_frame_plt */
692 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
696 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
697 for the PLTResolve stub and then for each PLT entry. */
698 #define PLTRESOLVE_RELOCS_SHLIB 0
699 #define PLTRESOLVE_RELOCS 2
700 #define PLT_NON_JUMP_SLOT_RELOCS 2
702 /* Architecture-specific backend data for i386. */
704 struct elf_i386_backend_data
706 /* Parameters describing PLT generation. */
707 const struct elf_i386_plt_layout
*plt
;
709 /* Value used to fill the unused bytes of the first PLT entry. */
710 bfd_byte plt0_pad_byte
;
712 /* True if the target system is VxWorks. */
716 #define get_elf_i386_backend_data(abfd) \
717 ((const struct elf_i386_backend_data *) \
718 get_elf_backend_data (abfd)->arch_data)
720 /* These are the standard parameters. */
721 static const struct elf_i386_backend_data elf_i386_arch_bed
=
723 &elf_i386_plt
, /* plt */
724 0, /* plt0_pad_byte */
728 #define elf_backend_arch_data &elf_i386_arch_bed
730 /* i386 ELF linker hash entry. */
732 struct elf_i386_link_hash_entry
734 struct elf_link_hash_entry elf
;
736 /* Track dynamic relocs copied for this symbol. */
737 struct elf_dyn_relocs
*dyn_relocs
;
739 #define GOT_UNKNOWN 0
743 #define GOT_TLS_IE_POS 5
744 #define GOT_TLS_IE_NEG 6
745 #define GOT_TLS_IE_BOTH 7
746 #define GOT_TLS_GDESC 8
747 #define GOT_TLS_GD_BOTH_P(type) \
748 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
749 #define GOT_TLS_GD_P(type) \
750 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
751 #define GOT_TLS_GDESC_P(type) \
752 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GD_ANY_P(type) \
754 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
755 unsigned char tls_type
;
757 /* Information about the GOT PLT entry. Filled when there are both
758 GOT and PLT relocations against the same function. */
759 union gotplt_union plt_got
;
761 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
762 starting at the end of the jump table. */
766 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
768 struct elf_i386_obj_tdata
770 struct elf_obj_tdata root
;
772 /* tls_type for each local got entry. */
773 char *local_got_tls_type
;
775 /* GOTPLT entries for TLS descriptors. */
776 bfd_vma
*local_tlsdesc_gotent
;
779 #define elf_i386_tdata(abfd) \
780 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
782 #define elf_i386_local_got_tls_type(abfd) \
783 (elf_i386_tdata (abfd)->local_got_tls_type)
785 #define elf_i386_local_tlsdesc_gotent(abfd) \
786 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
788 #define is_i386_elf(bfd) \
789 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
790 && elf_tdata (bfd) != NULL \
791 && elf_object_id (bfd) == I386_ELF_DATA)
794 elf_i386_mkobject (bfd
*abfd
)
796 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
800 /* i386 ELF linker hash table. */
802 struct elf_i386_link_hash_table
804 struct elf_link_hash_table elf
;
806 /* Short-cuts to get to dynamic linker sections. */
809 asection
*plt_eh_frame
;
814 bfd_signed_vma refcount
;
818 /* The amount of space used by the reserved portion of the sgotplt
819 section, plus whatever space is used by the jump slots. */
820 bfd_vma sgotplt_jump_table_size
;
822 /* Small local sym cache. */
823 struct sym_cache sym_cache
;
825 /* _TLS_MODULE_BASE_ symbol. */
826 struct bfd_link_hash_entry
*tls_module_base
;
828 /* Used by local STT_GNU_IFUNC symbols. */
829 htab_t loc_hash_table
;
830 void * loc_hash_memory
;
832 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
835 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
836 bfd_vma next_tls_desc_index
;
838 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
839 bfd_vma next_jump_slot_index
;
841 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
842 bfd_vma next_irelative_index
;
845 /* Get the i386 ELF linker hash table from a link_info structure. */
847 #define elf_i386_hash_table(p) \
848 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
849 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
851 #define elf_i386_compute_jump_table_size(htab) \
852 ((htab)->elf.srelplt->reloc_count * 4)
854 /* Create an entry in an i386 ELF linker hash table. */
856 static struct bfd_hash_entry
*
857 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
858 struct bfd_hash_table
*table
,
861 /* Allocate the structure if it has not already been allocated by a
865 entry
= (struct bfd_hash_entry
*)
866 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
871 /* Call the allocation method of the superclass. */
872 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
875 struct elf_i386_link_hash_entry
*eh
;
877 eh
= (struct elf_i386_link_hash_entry
*) entry
;
878 eh
->dyn_relocs
= NULL
;
879 eh
->tls_type
= GOT_UNKNOWN
;
880 eh
->plt_got
.offset
= (bfd_vma
) -1;
881 eh
->tlsdesc_got
= (bfd_vma
) -1;
887 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
888 for local symbol so that we can handle local STT_GNU_IFUNC symbols
889 as global symbol. We reuse indx and dynstr_index for local symbol
890 hash since they aren't used by global symbols in this backend. */
893 elf_i386_local_htab_hash (const void *ptr
)
895 struct elf_link_hash_entry
*h
896 = (struct elf_link_hash_entry
*) ptr
;
897 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
900 /* Compare local hash entries. */
903 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
905 struct elf_link_hash_entry
*h1
906 = (struct elf_link_hash_entry
*) ptr1
;
907 struct elf_link_hash_entry
*h2
908 = (struct elf_link_hash_entry
*) ptr2
;
910 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
913 /* Find and/or create a hash entry for local symbol. */
915 static struct elf_link_hash_entry
*
916 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
917 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
920 struct elf_i386_link_hash_entry e
, *ret
;
921 asection
*sec
= abfd
->sections
;
922 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
923 ELF32_R_SYM (rel
->r_info
));
926 e
.elf
.indx
= sec
->id
;
927 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
928 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
929 create
? INSERT
: NO_INSERT
);
936 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
940 ret
= (struct elf_i386_link_hash_entry
*)
941 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
942 sizeof (struct elf_i386_link_hash_entry
));
945 memset (ret
, 0, sizeof (*ret
));
946 ret
->elf
.indx
= sec
->id
;
947 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
948 ret
->elf
.dynindx
= -1;
949 ret
->plt_got
.offset
= (bfd_vma
) -1;
955 /* Destroy an i386 ELF linker hash table. */
958 elf_i386_link_hash_table_free (bfd
*obfd
)
960 struct elf_i386_link_hash_table
*htab
961 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
963 if (htab
->loc_hash_table
)
964 htab_delete (htab
->loc_hash_table
);
965 if (htab
->loc_hash_memory
)
966 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
967 _bfd_elf_link_hash_table_free (obfd
);
970 /* Create an i386 ELF linker hash table. */
972 static struct bfd_link_hash_table
*
973 elf_i386_link_hash_table_create (bfd
*abfd
)
975 struct elf_i386_link_hash_table
*ret
;
976 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
978 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
982 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
983 elf_i386_link_hash_newfunc
,
984 sizeof (struct elf_i386_link_hash_entry
),
991 ret
->loc_hash_table
= htab_try_create (1024,
992 elf_i386_local_htab_hash
,
993 elf_i386_local_htab_eq
,
995 ret
->loc_hash_memory
= objalloc_create ();
996 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
998 elf_i386_link_hash_table_free (abfd
);
1001 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1003 return &ret
->elf
.root
;
1006 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1007 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1011 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1013 struct elf_i386_link_hash_table
*htab
;
1015 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1018 htab
= elf_i386_hash_table (info
);
1022 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1024 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rel.bss");
1027 || (!info
->shared
&& !htab
->srelbss
))
1030 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1031 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1035 if (!info
->no_ld_generated_unwind_info
1036 && htab
->plt_eh_frame
== NULL
1037 && htab
->elf
.splt
!= NULL
)
1039 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1040 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1041 | SEC_LINKER_CREATED
);
1043 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1044 if (htab
->plt_eh_frame
== NULL
1045 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1052 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1055 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1056 struct elf_link_hash_entry
*dir
,
1057 struct elf_link_hash_entry
*ind
)
1059 struct elf_i386_link_hash_entry
*edir
, *eind
;
1061 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1062 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1064 if (eind
->dyn_relocs
!= NULL
)
1066 if (edir
->dyn_relocs
!= NULL
)
1068 struct elf_dyn_relocs
**pp
;
1069 struct elf_dyn_relocs
*p
;
1071 /* Add reloc counts against the indirect sym to the direct sym
1072 list. Merge any entries against the same section. */
1073 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1075 struct elf_dyn_relocs
*q
;
1077 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1078 if (q
->sec
== p
->sec
)
1080 q
->pc_count
+= p
->pc_count
;
1081 q
->count
+= p
->count
;
1088 *pp
= edir
->dyn_relocs
;
1091 edir
->dyn_relocs
= eind
->dyn_relocs
;
1092 eind
->dyn_relocs
= NULL
;
1095 if (ind
->root
.type
== bfd_link_hash_indirect
1096 && dir
->got
.refcount
<= 0)
1098 edir
->tls_type
= eind
->tls_type
;
1099 eind
->tls_type
= GOT_UNKNOWN
;
1102 if (ELIMINATE_COPY_RELOCS
1103 && ind
->root
.type
!= bfd_link_hash_indirect
1104 && dir
->dynamic_adjusted
)
1106 /* If called to transfer flags for a weakdef during processing
1107 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1108 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1109 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1110 dir
->ref_regular
|= ind
->ref_regular
;
1111 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1112 dir
->needs_plt
|= ind
->needs_plt
;
1113 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1116 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1119 /* Return TRUE if the TLS access code sequence support transition
1123 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1125 Elf_Internal_Shdr
*symtab_hdr
,
1126 struct elf_link_hash_entry
**sym_hashes
,
1127 unsigned int r_type
,
1128 const Elf_Internal_Rela
*rel
,
1129 const Elf_Internal_Rela
*relend
)
1131 unsigned int val
, type
;
1132 unsigned long r_symndx
;
1133 struct elf_link_hash_entry
*h
;
1136 /* Get the section contents. */
1137 if (contents
== NULL
)
1139 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1140 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1143 /* FIXME: How to better handle error condition? */
1144 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1147 /* Cache the section contents for elf_link_input_bfd. */
1148 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1152 offset
= rel
->r_offset
;
1157 if (offset
< 2 || (rel
+ 1) >= relend
)
1160 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1161 if (r_type
== R_386_TLS_GD
)
1163 /* Check transition from GD access model. Only
1164 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1165 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1166 can transit to different access model. */
1167 if ((offset
+ 10) > sec
->size
||
1168 (type
!= 0x8d && type
!= 0x04))
1171 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1174 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1178 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1181 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1186 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1187 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1190 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1196 /* Check transition from LD access model. Only
1197 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1198 can transit to different access model. */
1199 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1202 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1203 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1207 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1210 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1211 if (r_symndx
< symtab_hdr
->sh_info
)
1214 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1215 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1216 may be versioned. */
1218 && h
->root
.root
.string
!= NULL
1219 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1220 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1221 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1225 /* Check transition from IE access model:
1226 movl foo@indntpoff(%rip), %eax
1227 movl foo@indntpoff(%rip), %reg
1228 addl foo@indntpoff(%rip), %reg
1231 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1234 /* Check "movl foo@tpoff(%rip), %eax" first. */
1235 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1242 /* Check movl|addl foo@tpoff(%rip), %reg. */
1243 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1244 return ((type
== 0x8b || type
== 0x03)
1245 && (val
& 0xc7) == 0x05);
1247 case R_386_TLS_GOTIE
:
1248 case R_386_TLS_IE_32
:
1249 /* Check transition from {IE_32,GOTIE} access model:
1250 subl foo@{tpoff,gontoff}(%reg1), %reg2
1251 movl foo@{tpoff,gontoff}(%reg1), %reg2
1252 addl foo@{tpoff,gontoff}(%reg1), %reg2
1255 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1258 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1259 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1262 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1263 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1265 case R_386_TLS_GOTDESC
:
1266 /* Check transition from GDesc access model:
1267 leal x@tlsdesc(%ebx), %eax
1269 Make sure it's a leal adding ebx to a 32-bit offset
1270 into any register, although it's probably almost always
1273 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1276 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1279 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1280 return (val
& 0xc7) == 0x83;
1282 case R_386_TLS_DESC_CALL
:
1283 /* Check transition from GDesc access model:
1284 call *x@tlsdesc(%rax)
1286 if (offset
+ 2 <= sec
->size
)
1288 /* Make sure that it's a call *x@tlsdesc(%rax). */
1289 static const unsigned char call
[] = { 0xff, 0x10 };
1290 return memcmp (contents
+ offset
, call
, 2) == 0;
1300 /* Return TRUE if the TLS access transition is OK or no transition
1301 will be performed. Update R_TYPE if there is a transition. */
1304 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1305 asection
*sec
, bfd_byte
*contents
,
1306 Elf_Internal_Shdr
*symtab_hdr
,
1307 struct elf_link_hash_entry
**sym_hashes
,
1308 unsigned int *r_type
, int tls_type
,
1309 const Elf_Internal_Rela
*rel
,
1310 const Elf_Internal_Rela
*relend
,
1311 struct elf_link_hash_entry
*h
,
1312 unsigned long r_symndx
)
1314 unsigned int from_type
= *r_type
;
1315 unsigned int to_type
= from_type
;
1316 bfd_boolean check
= TRUE
;
1318 /* Skip TLS transition for functions. */
1320 && (h
->type
== STT_FUNC
1321 || h
->type
== STT_GNU_IFUNC
))
1327 case R_386_TLS_GOTDESC
:
1328 case R_386_TLS_DESC_CALL
:
1329 case R_386_TLS_IE_32
:
1331 case R_386_TLS_GOTIE
:
1332 if (info
->executable
)
1335 to_type
= R_386_TLS_LE_32
;
1336 else if (from_type
!= R_386_TLS_IE
1337 && from_type
!= R_386_TLS_GOTIE
)
1338 to_type
= R_386_TLS_IE_32
;
1341 /* When we are called from elf_i386_relocate_section, CONTENTS
1342 isn't NULL and there may be additional transitions based on
1344 if (contents
!= NULL
)
1346 unsigned int new_to_type
= to_type
;
1348 if (info
->executable
1351 && (tls_type
& GOT_TLS_IE
))
1352 new_to_type
= R_386_TLS_LE_32
;
1354 if (to_type
== R_386_TLS_GD
1355 || to_type
== R_386_TLS_GOTDESC
1356 || to_type
== R_386_TLS_DESC_CALL
)
1358 if (tls_type
== GOT_TLS_IE_POS
)
1359 new_to_type
= R_386_TLS_GOTIE
;
1360 else if (tls_type
& GOT_TLS_IE
)
1361 new_to_type
= R_386_TLS_IE_32
;
1364 /* We checked the transition before when we were called from
1365 elf_i386_check_relocs. We only want to check the new
1366 transition which hasn't been checked before. */
1367 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1368 to_type
= new_to_type
;
1374 if (info
->executable
)
1375 to_type
= R_386_TLS_LE_32
;
1382 /* Return TRUE if there is no transition. */
1383 if (from_type
== to_type
)
1386 /* Check if the transition can be performed. */
1388 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1389 symtab_hdr
, sym_hashes
,
1390 from_type
, rel
, relend
))
1392 reloc_howto_type
*from
, *to
;
1395 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1396 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1399 name
= h
->root
.root
.string
;
1402 struct elf_i386_link_hash_table
*htab
;
1404 htab
= elf_i386_hash_table (info
);
1409 Elf_Internal_Sym
*isym
;
1411 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1413 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1417 (*_bfd_error_handler
)
1418 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1419 "in section `%A' failed"),
1420 abfd
, sec
, from
->name
, to
->name
, name
,
1421 (unsigned long) rel
->r_offset
);
1422 bfd_set_error (bfd_error_bad_value
);
1430 /* Look through the relocs for a section during the first phase, and
1431 calculate needed space in the global offset table, procedure linkage
1432 table, and dynamic reloc sections. */
1435 elf_i386_check_relocs (bfd
*abfd
,
1436 struct bfd_link_info
*info
,
1438 const Elf_Internal_Rela
*relocs
)
1440 struct elf_i386_link_hash_table
*htab
;
1441 Elf_Internal_Shdr
*symtab_hdr
;
1442 struct elf_link_hash_entry
**sym_hashes
;
1443 const Elf_Internal_Rela
*rel
;
1444 const Elf_Internal_Rela
*rel_end
;
1446 bfd_boolean use_plt_got
;
1448 if (info
->relocatable
)
1451 BFD_ASSERT (is_i386_elf (abfd
));
1453 htab
= elf_i386_hash_table (info
);
1457 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1458 && (get_elf_i386_backend_data (abfd
)
1459 == &elf_i386_arch_bed
));
1461 symtab_hdr
= &elf_symtab_hdr (abfd
);
1462 sym_hashes
= elf_sym_hashes (abfd
);
1466 rel_end
= relocs
+ sec
->reloc_count
;
1467 for (rel
= relocs
; rel
< rel_end
; rel
++)
1469 unsigned int r_type
;
1470 unsigned long r_symndx
;
1471 struct elf_link_hash_entry
*h
;
1472 Elf_Internal_Sym
*isym
;
1474 bfd_boolean size_reloc
;
1476 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1477 r_type
= ELF32_R_TYPE (rel
->r_info
);
1479 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1481 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1487 if (r_symndx
< symtab_hdr
->sh_info
)
1489 /* A local symbol. */
1490 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1495 /* Check relocation against local STT_GNU_IFUNC symbol. */
1496 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1498 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1502 /* Fake a STT_GNU_IFUNC symbol. */
1503 h
->type
= STT_GNU_IFUNC
;
1506 h
->forced_local
= 1;
1507 h
->root
.type
= bfd_link_hash_defined
;
1515 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1516 while (h
->root
.type
== bfd_link_hash_indirect
1517 || h
->root
.type
== bfd_link_hash_warning
)
1518 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1523 /* Create the ifunc sections for static executables. If we
1524 never see an indirect function symbol nor we are building
1525 a static executable, those sections will be empty and
1526 won't appear in output. */
1537 if (htab
->elf
.dynobj
== NULL
)
1538 htab
->elf
.dynobj
= abfd
;
1539 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1544 /* It is referenced by a non-shared object. */
1546 h
->root
.non_ir_ref
= 1;
1549 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1550 symtab_hdr
, sym_hashes
,
1551 &r_type
, GOT_UNKNOWN
,
1552 rel
, rel_end
, h
, r_symndx
))
1558 htab
->tls_ldm_got
.refcount
+= 1;
1562 /* This symbol requires a procedure linkage table entry. We
1563 actually build the entry in adjust_dynamic_symbol,
1564 because this might be a case of linking PIC code which is
1565 never referenced by a dynamic object, in which case we
1566 don't need to generate a procedure linkage table entry
1569 /* If this is a local symbol, we resolve it directly without
1570 creating a procedure linkage table entry. */
1575 h
->plt
.refcount
+= 1;
1582 case R_386_TLS_IE_32
:
1584 case R_386_TLS_GOTIE
:
1585 if (!info
->executable
)
1586 info
->flags
|= DF_STATIC_TLS
;
1591 case R_386_TLS_GOTDESC
:
1592 case R_386_TLS_DESC_CALL
:
1593 /* This symbol requires a global offset table entry. */
1595 int tls_type
, old_tls_type
;
1600 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1601 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1602 case R_386_TLS_GOTDESC
:
1603 case R_386_TLS_DESC_CALL
:
1604 tls_type
= GOT_TLS_GDESC
; break;
1605 case R_386_TLS_IE_32
:
1606 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1607 tls_type
= GOT_TLS_IE_NEG
;
1609 /* If this is a GD->IE transition, we may use either of
1610 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1611 tls_type
= GOT_TLS_IE
;
1614 case R_386_TLS_GOTIE
:
1615 tls_type
= GOT_TLS_IE_POS
; break;
1620 h
->got
.refcount
+= 1;
1621 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1625 bfd_signed_vma
*local_got_refcounts
;
1627 /* This is a global offset table entry for a local symbol. */
1628 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1629 if (local_got_refcounts
== NULL
)
1633 size
= symtab_hdr
->sh_info
;
1634 size
*= (sizeof (bfd_signed_vma
)
1635 + sizeof (bfd_vma
) + sizeof(char));
1636 local_got_refcounts
= (bfd_signed_vma
*)
1637 bfd_zalloc (abfd
, size
);
1638 if (local_got_refcounts
== NULL
)
1640 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1641 elf_i386_local_tlsdesc_gotent (abfd
)
1642 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1643 elf_i386_local_got_tls_type (abfd
)
1644 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1646 local_got_refcounts
[r_symndx
] += 1;
1647 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1650 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1651 tls_type
|= old_tls_type
;
1652 /* If a TLS symbol is accessed using IE at least once,
1653 there is no point to use dynamic model for it. */
1654 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1655 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1656 || (tls_type
& GOT_TLS_IE
) == 0))
1658 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1659 tls_type
= old_tls_type
;
1660 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1661 && GOT_TLS_GD_ANY_P (tls_type
))
1662 tls_type
|= old_tls_type
;
1666 name
= h
->root
.root
.string
;
1668 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1670 (*_bfd_error_handler
)
1671 (_("%B: `%s' accessed both as normal and "
1672 "thread local symbol"),
1674 bfd_set_error (bfd_error_bad_value
);
1679 if (old_tls_type
!= tls_type
)
1682 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1684 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1692 if (htab
->elf
.sgot
== NULL
)
1694 if (htab
->elf
.dynobj
== NULL
)
1695 htab
->elf
.dynobj
= abfd
;
1696 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1699 if (r_type
!= R_386_TLS_IE
)
1703 case R_386_TLS_LE_32
:
1705 if (info
->executable
)
1707 info
->flags
|= DF_STATIC_TLS
;
1712 if (h
!= NULL
&& info
->executable
)
1714 /* If this reloc is in a read-only section, we might
1715 need a copy reloc. We can't check reliably at this
1716 stage whether the section is read-only, as input
1717 sections have not yet been mapped to output sections.
1718 Tentatively set the flag for now, and correct in
1719 adjust_dynamic_symbol. */
1722 /* We may need a .plt entry if the function this reloc
1723 refers to is in a shared lib. */
1724 h
->plt
.refcount
+= 1;
1725 if (r_type
!= R_386_PC32
)
1726 h
->pointer_equality_needed
= 1;
1731 /* If we are creating a shared library, and this is a reloc
1732 against a global symbol, or a non PC relative reloc
1733 against a local symbol, then we need to copy the reloc
1734 into the shared library. However, if we are linking with
1735 -Bsymbolic, we do not need to copy a reloc against a
1736 global symbol which is defined in an object we are
1737 including in the link (i.e., DEF_REGULAR is set). At
1738 this point we have not seen all the input files, so it is
1739 possible that DEF_REGULAR is not set now but will be set
1740 later (it is never cleared). In case of a weak definition,
1741 DEF_REGULAR may be cleared later by a strong definition in
1742 a shared library. We account for that possibility below by
1743 storing information in the relocs_copied field of the hash
1744 table entry. A similar situation occurs when creating
1745 shared libraries and symbol visibility changes render the
1748 If on the other hand, we are creating an executable, we
1749 may need to keep relocations for symbols satisfied by a
1750 dynamic library if we manage to avoid copy relocs for the
1753 && (sec
->flags
& SEC_ALLOC
) != 0
1754 && (r_type
!= R_386_PC32
1756 && (! SYMBOLIC_BIND (info
, h
)
1757 || h
->root
.type
== bfd_link_hash_defweak
1758 || !h
->def_regular
))))
1759 || (ELIMINATE_COPY_RELOCS
1761 && (sec
->flags
& SEC_ALLOC
) != 0
1763 && (h
->root
.type
== bfd_link_hash_defweak
1764 || !h
->def_regular
)))
1766 struct elf_dyn_relocs
*p
;
1767 struct elf_dyn_relocs
**head
;
1769 /* We must copy these reloc types into the output file.
1770 Create a reloc section in dynobj and make room for
1774 if (htab
->elf
.dynobj
== NULL
)
1775 htab
->elf
.dynobj
= abfd
;
1777 sreloc
= _bfd_elf_make_dynamic_reloc_section
1778 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1784 /* If this is a global symbol, we count the number of
1785 relocations we need for this symbol. */
1788 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1792 /* Track dynamic relocs needed for local syms too.
1793 We really need local syms available to do this
1798 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1803 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1807 vpp
= &elf_section_data (s
)->local_dynrel
;
1808 head
= (struct elf_dyn_relocs
**)vpp
;
1812 if (p
== NULL
|| p
->sec
!= sec
)
1814 bfd_size_type amt
= sizeof *p
;
1815 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1827 /* Count size relocation as PC-relative relocation. */
1828 if (r_type
== R_386_PC32
|| size_reloc
)
1833 /* This relocation describes the C++ object vtable hierarchy.
1834 Reconstruct it for later use during GC. */
1835 case R_386_GNU_VTINHERIT
:
1836 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1840 /* This relocation describes which C++ vtable entries are actually
1841 used. Record for later use during GC. */
1842 case R_386_GNU_VTENTRY
:
1843 BFD_ASSERT (h
!= NULL
);
1845 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1855 && h
->plt
.refcount
> 0
1856 && h
->got
.refcount
> 0
1857 && htab
->plt_got
== NULL
)
1859 /* Create the GOT procedure linkage table. */
1860 unsigned int plt_got_align
;
1861 const struct elf_backend_data
*bed
;
1863 bed
= get_elf_backend_data (info
->output_bfd
);
1864 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1865 && (sizeof (elf_i386_got_plt_entry
)
1866 == sizeof (elf_i386_pic_got_plt_entry
)));
1869 if (htab
->elf
.dynobj
== NULL
)
1870 htab
->elf
.dynobj
= abfd
;
1872 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1874 (bed
->dynamic_sec_flags
1879 if (htab
->plt_got
== NULL
1880 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1890 /* Return the section that should be marked against GC for a given
1894 elf_i386_gc_mark_hook (asection
*sec
,
1895 struct bfd_link_info
*info
,
1896 Elf_Internal_Rela
*rel
,
1897 struct elf_link_hash_entry
*h
,
1898 Elf_Internal_Sym
*sym
)
1901 switch (ELF32_R_TYPE (rel
->r_info
))
1903 case R_386_GNU_VTINHERIT
:
1904 case R_386_GNU_VTENTRY
:
1908 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1911 /* Update the got entry reference counts for the section being removed. */
1914 elf_i386_gc_sweep_hook (bfd
*abfd
,
1915 struct bfd_link_info
*info
,
1917 const Elf_Internal_Rela
*relocs
)
1919 struct elf_i386_link_hash_table
*htab
;
1920 Elf_Internal_Shdr
*symtab_hdr
;
1921 struct elf_link_hash_entry
**sym_hashes
;
1922 bfd_signed_vma
*local_got_refcounts
;
1923 const Elf_Internal_Rela
*rel
, *relend
;
1925 if (info
->relocatable
)
1928 htab
= elf_i386_hash_table (info
);
1932 elf_section_data (sec
)->local_dynrel
= NULL
;
1934 symtab_hdr
= &elf_symtab_hdr (abfd
);
1935 sym_hashes
= elf_sym_hashes (abfd
);
1936 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1938 relend
= relocs
+ sec
->reloc_count
;
1939 for (rel
= relocs
; rel
< relend
; rel
++)
1941 unsigned long r_symndx
;
1942 unsigned int r_type
;
1943 struct elf_link_hash_entry
*h
= NULL
;
1945 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1946 if (r_symndx
>= symtab_hdr
->sh_info
)
1948 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1949 while (h
->root
.type
== bfd_link_hash_indirect
1950 || h
->root
.type
== bfd_link_hash_warning
)
1951 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1955 /* A local symbol. */
1956 Elf_Internal_Sym
*isym
;
1958 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1961 /* Check relocation against local STT_GNU_IFUNC symbol. */
1963 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1965 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1973 struct elf_i386_link_hash_entry
*eh
;
1974 struct elf_dyn_relocs
**pp
;
1975 struct elf_dyn_relocs
*p
;
1977 eh
= (struct elf_i386_link_hash_entry
*) h
;
1978 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1981 /* Everything must go for SEC. */
1987 r_type
= ELF32_R_TYPE (rel
->r_info
);
1988 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1989 symtab_hdr
, sym_hashes
,
1990 &r_type
, GOT_UNKNOWN
,
1991 rel
, relend
, h
, r_symndx
))
1997 if (htab
->tls_ldm_got
.refcount
> 0)
1998 htab
->tls_ldm_got
.refcount
-= 1;
2002 case R_386_TLS_GOTDESC
:
2003 case R_386_TLS_DESC_CALL
:
2004 case R_386_TLS_IE_32
:
2006 case R_386_TLS_GOTIE
:
2010 if (h
->got
.refcount
> 0)
2011 h
->got
.refcount
-= 1;
2012 if (h
->type
== STT_GNU_IFUNC
)
2014 if (h
->plt
.refcount
> 0)
2015 h
->plt
.refcount
-= 1;
2018 else if (local_got_refcounts
!= NULL
)
2020 if (local_got_refcounts
[r_symndx
] > 0)
2021 local_got_refcounts
[r_symndx
] -= 1;
2029 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2036 if (h
->plt
.refcount
> 0)
2037 h
->plt
.refcount
-= 1;
2042 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2044 if (h
->got
.refcount
> 0)
2045 h
->got
.refcount
-= 1;
2046 if (h
->plt
.refcount
> 0)
2047 h
->plt
.refcount
-= 1;
2059 /* Adjust a symbol defined by a dynamic object and referenced by a
2060 regular object. The current definition is in some section of the
2061 dynamic object, but we're not including those sections. We have to
2062 change the definition to something the rest of the link can
2066 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2067 struct elf_link_hash_entry
*h
)
2069 struct elf_i386_link_hash_table
*htab
;
2071 struct elf_i386_link_hash_entry
*eh
;
2072 struct elf_dyn_relocs
*p
;
2074 /* STT_GNU_IFUNC symbol must go through PLT. */
2075 if (h
->type
== STT_GNU_IFUNC
)
2077 /* All local STT_GNU_IFUNC references must be treate as local
2078 calls via local PLT. */
2080 && SYMBOL_CALLS_LOCAL (info
, h
))
2082 bfd_size_type pc_count
= 0, count
= 0;
2083 struct elf_dyn_relocs
**pp
;
2085 eh
= (struct elf_i386_link_hash_entry
*) h
;
2086 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2088 pc_count
+= p
->pc_count
;
2089 p
->count
-= p
->pc_count
;
2098 if (pc_count
|| count
)
2102 if (h
->plt
.refcount
<= 0)
2103 h
->plt
.refcount
= 1;
2105 h
->plt
.refcount
+= 1;
2109 if (h
->plt
.refcount
<= 0)
2111 h
->plt
.offset
= (bfd_vma
) -1;
2117 /* If this is a function, put it in the procedure linkage table. We
2118 will fill in the contents of the procedure linkage table later,
2119 when we know the address of the .got section. */
2120 if (h
->type
== STT_FUNC
2123 if (h
->plt
.refcount
<= 0
2124 || SYMBOL_CALLS_LOCAL (info
, h
)
2125 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2126 && h
->root
.type
== bfd_link_hash_undefweak
))
2128 /* This case can occur if we saw a PLT32 reloc in an input
2129 file, but the symbol was never referred to by a dynamic
2130 object, or if all references were garbage collected. In
2131 such a case, we don't actually need to build a procedure
2132 linkage table, and we can just do a PC32 reloc instead. */
2133 h
->plt
.offset
= (bfd_vma
) -1;
2140 /* It's possible that we incorrectly decided a .plt reloc was
2141 needed for an R_386_PC32 reloc to a non-function sym in
2142 check_relocs. We can't decide accurately between function and
2143 non-function syms in check-relocs; Objects loaded later in
2144 the link may change h->type. So fix it now. */
2145 h
->plt
.offset
= (bfd_vma
) -1;
2147 /* If this is a weak symbol, and there is a real definition, the
2148 processor independent code will have arranged for us to see the
2149 real definition first, and we can just use the same value. */
2150 if (h
->u
.weakdef
!= NULL
)
2152 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2153 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2154 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2155 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2156 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2157 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2161 /* This is a reference to a symbol defined by a dynamic object which
2162 is not a function. */
2164 /* If we are creating a shared library, we must presume that the
2165 only references to the symbol are via the global offset table.
2166 For such cases we need not do anything here; the relocations will
2167 be handled correctly by relocate_section. */
2171 /* If there are no references to this symbol that do not use the
2172 GOT, we don't need to generate a copy reloc. */
2173 if (!h
->non_got_ref
)
2176 /* If -z nocopyreloc was given, we won't generate them either. */
2177 if (info
->nocopyreloc
)
2183 htab
= elf_i386_hash_table (info
);
2187 /* If there aren't any dynamic relocs in read-only sections, then
2188 we can keep the dynamic relocs and avoid the copy reloc. This
2189 doesn't work on VxWorks, where we can not have dynamic relocations
2190 (other than copy and jump slot relocations) in an executable. */
2191 if (ELIMINATE_COPY_RELOCS
2192 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2194 eh
= (struct elf_i386_link_hash_entry
*) h
;
2195 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2197 s
= p
->sec
->output_section
;
2198 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2209 /* We must allocate the symbol in our .dynbss section, which will
2210 become part of the .bss section of the executable. There will be
2211 an entry for this symbol in the .dynsym section. The dynamic
2212 object will contain position independent code, so all references
2213 from the dynamic object to this symbol will go through the global
2214 offset table. The dynamic linker will use the .dynsym entry to
2215 determine the address it must put in the global offset table, so
2216 both the dynamic object and the regular object will refer to the
2217 same memory location for the variable. */
2219 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2220 copy the initial value out of the dynamic object and into the
2221 runtime process image. */
2222 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2224 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2230 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2233 /* Allocate space in .plt, .got and associated reloc sections for
2237 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2239 struct bfd_link_info
*info
;
2240 struct elf_i386_link_hash_table
*htab
;
2241 struct elf_i386_link_hash_entry
*eh
;
2242 struct elf_dyn_relocs
*p
;
2243 unsigned plt_entry_size
;
2245 if (h
->root
.type
== bfd_link_hash_indirect
)
2248 eh
= (struct elf_i386_link_hash_entry
*) h
;
2250 info
= (struct bfd_link_info
*) inf
;
2251 htab
= elf_i386_hash_table (info
);
2255 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2257 /* We can't use the GOT PLT if pointer equality is needed since
2258 finish_dynamic_symbol won't clear symbol value and the dynamic
2259 linker won't update the GOT slot. We will get into an infinite
2260 loop at run-time. */
2261 if (htab
->plt_got
!= NULL
2262 && h
->type
!= STT_GNU_IFUNC
2263 && !h
->pointer_equality_needed
2264 && h
->plt
.refcount
> 0
2265 && h
->got
.refcount
> 0)
2267 /* Don't use the regular PLT if there are both GOT and GOTPLT
2269 h
->plt
.offset
= (bfd_vma
) -1;
2271 /* Use the GOT PLT. */
2272 eh
->plt_got
.refcount
= 1;
2275 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2276 here if it is defined and referenced in a non-shared object. */
2277 if (h
->type
== STT_GNU_IFUNC
2279 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2282 else if (htab
->elf
.dynamic_sections_created
2283 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2285 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2287 /* Make sure this symbol is output as a dynamic symbol.
2288 Undefined weak syms won't yet be marked as dynamic. */
2289 if (h
->dynindx
== -1
2290 && !h
->forced_local
)
2292 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2297 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2299 asection
*s
= htab
->elf
.splt
;
2300 asection
*got_s
= htab
->plt_got
;
2302 /* If this is the first .plt entry, make room for the special
2305 s
->size
= plt_entry_size
;
2308 eh
->plt_got
.offset
= got_s
->size
;
2310 h
->plt
.offset
= s
->size
;
2312 /* If this symbol is not defined in a regular file, and we are
2313 not generating a shared library, then set the symbol to this
2314 location in the .plt. This is required to make function
2315 pointers compare as equal between the normal executable and
2316 the shared library. */
2322 /* We need to make a call to the entry of the GOT PLT
2323 instead of regular PLT entry. */
2324 h
->root
.u
.def
.section
= got_s
;
2325 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2329 h
->root
.u
.def
.section
= s
;
2330 h
->root
.u
.def
.value
= h
->plt
.offset
;
2334 /* Make room for this entry. */
2336 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2339 s
->size
+= plt_entry_size
;
2341 /* We also need to make an entry in the .got.plt section,
2342 which will be placed in the .got section by the linker
2344 htab
->elf
.sgotplt
->size
+= 4;
2346 /* We also need to make an entry in the .rel.plt section. */
2347 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2348 htab
->elf
.srelplt
->reloc_count
++;
2351 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2354 /* VxWorks has a second set of relocations for each PLT entry
2355 in executables. They go in a separate relocation section,
2356 which is processed by the kernel loader. */
2358 /* There are two relocations for the initial PLT entry: an
2359 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2360 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2362 if (h
->plt
.offset
== plt_entry_size
)
2363 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2365 /* There are two extra relocations for each subsequent PLT entry:
2366 an R_386_32 relocation for the GOT entry, and an R_386_32
2367 relocation for the PLT entry. */
2369 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2374 h
->plt
.offset
= (bfd_vma
) -1;
2380 h
->plt
.offset
= (bfd_vma
) -1;
2384 eh
->tlsdesc_got
= (bfd_vma
) -1;
2386 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2387 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2388 if (h
->got
.refcount
> 0
2391 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2392 h
->got
.offset
= (bfd_vma
) -1;
2393 else if (h
->got
.refcount
> 0)
2397 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2399 /* Make sure this symbol is output as a dynamic symbol.
2400 Undefined weak syms won't yet be marked as dynamic. */
2401 if (h
->dynindx
== -1
2402 && !h
->forced_local
)
2404 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2409 if (GOT_TLS_GDESC_P (tls_type
))
2411 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2412 - elf_i386_compute_jump_table_size (htab
);
2413 htab
->elf
.sgotplt
->size
+= 8;
2414 h
->got
.offset
= (bfd_vma
) -2;
2416 if (! GOT_TLS_GDESC_P (tls_type
)
2417 || GOT_TLS_GD_P (tls_type
))
2419 h
->got
.offset
= s
->size
;
2421 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2422 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2425 dyn
= htab
->elf
.dynamic_sections_created
;
2426 /* R_386_TLS_IE_32 needs one dynamic relocation,
2427 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2428 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2429 need two), R_386_TLS_GD needs one if local symbol and two if
2431 if (tls_type
== GOT_TLS_IE_BOTH
)
2432 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2433 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2434 || (tls_type
& GOT_TLS_IE
))
2435 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2436 else if (GOT_TLS_GD_P (tls_type
))
2437 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2438 else if (! GOT_TLS_GDESC_P (tls_type
)
2439 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2440 || h
->root
.type
!= bfd_link_hash_undefweak
)
2442 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2443 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2444 if (GOT_TLS_GDESC_P (tls_type
))
2445 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2448 h
->got
.offset
= (bfd_vma
) -1;
2450 if (eh
->dyn_relocs
== NULL
)
2453 /* In the shared -Bsymbolic case, discard space allocated for
2454 dynamic pc-relative relocs against symbols which turn out to be
2455 defined in regular objects. For the normal shared case, discard
2456 space for pc-relative relocs that have become local due to symbol
2457 visibility changes. */
2461 /* The only reloc that uses pc_count is R_386_PC32, which will
2462 appear on a call or on something like ".long foo - .". We
2463 want calls to protected symbols to resolve directly to the
2464 function rather than going via the plt. If people want
2465 function pointer comparisons to work as expected then they
2466 should avoid writing assembly like ".long foo - .". */
2467 if (SYMBOL_CALLS_LOCAL (info
, h
))
2469 struct elf_dyn_relocs
**pp
;
2471 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2473 p
->count
-= p
->pc_count
;
2482 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2484 struct elf_dyn_relocs
**pp
;
2485 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2487 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2494 /* Also discard relocs on undefined weak syms with non-default
2496 if (eh
->dyn_relocs
!= NULL
2497 && h
->root
.type
== bfd_link_hash_undefweak
)
2499 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2500 eh
->dyn_relocs
= NULL
;
2502 /* Make sure undefined weak symbols are output as a dynamic
2504 else if (h
->dynindx
== -1
2505 && !h
->forced_local
)
2507 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2512 else if (ELIMINATE_COPY_RELOCS
)
2514 /* For the non-shared case, discard space for relocs against
2515 symbols which turn out to need copy relocs or are not
2521 || (htab
->elf
.dynamic_sections_created
2522 && (h
->root
.type
== bfd_link_hash_undefweak
2523 || h
->root
.type
== bfd_link_hash_undefined
))))
2525 /* Make sure this symbol is output as a dynamic symbol.
2526 Undefined weak syms won't yet be marked as dynamic. */
2527 if (h
->dynindx
== -1
2528 && !h
->forced_local
)
2530 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2534 /* If that succeeded, we know we'll be keeping all the
2536 if (h
->dynindx
!= -1)
2540 eh
->dyn_relocs
= NULL
;
2545 /* Finally, allocate space. */
2546 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2550 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2552 BFD_ASSERT (sreloc
!= NULL
);
2553 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2559 /* Allocate space in .plt, .got and associated reloc sections for
2560 local dynamic relocs. */
2563 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2565 struct elf_link_hash_entry
*h
2566 = (struct elf_link_hash_entry
*) *slot
;
2568 if (h
->type
!= STT_GNU_IFUNC
2572 || h
->root
.type
!= bfd_link_hash_defined
)
2575 return elf_i386_allocate_dynrelocs (h
, inf
);
2578 /* Find any dynamic relocs that apply to read-only sections. */
2581 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2583 struct elf_i386_link_hash_entry
*eh
;
2584 struct elf_dyn_relocs
*p
;
2586 /* Skip local IFUNC symbols. */
2587 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2590 eh
= (struct elf_i386_link_hash_entry
*) h
;
2591 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2593 asection
*s
= p
->sec
->output_section
;
2595 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2597 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2599 info
->flags
|= DF_TEXTREL
;
2601 if (info
->warn_shared_textrel
&& info
->shared
)
2602 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2603 p
->sec
->owner
, h
->root
.root
.string
,
2606 /* Not an error, just cut short the traversal. */
2614 mov foo@GOT(%reg), %reg
2616 lea foo@GOTOFF(%reg), %reg
2617 with the local symbol, foo. */
2620 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2621 struct bfd_link_info
*link_info
)
2623 Elf_Internal_Shdr
*symtab_hdr
;
2624 Elf_Internal_Rela
*internal_relocs
;
2625 Elf_Internal_Rela
*irel
, *irelend
;
2627 struct elf_i386_link_hash_table
*htab
;
2628 bfd_boolean changed_contents
;
2629 bfd_boolean changed_relocs
;
2630 bfd_signed_vma
*local_got_refcounts
;
2632 /* Don't even try to convert non-ELF outputs. */
2633 if (!is_elf_hash_table (link_info
->hash
))
2636 /* Nothing to do if there are no codes, no relocations or no output. */
2637 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2638 || sec
->reloc_count
== 0
2639 || bfd_is_abs_section (sec
->output_section
))
2642 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2644 /* Load the relocations for this section. */
2645 internal_relocs
= (_bfd_elf_link_read_relocs
2646 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2647 link_info
->keep_memory
));
2648 if (internal_relocs
== NULL
)
2651 htab
= elf_i386_hash_table (link_info
);
2652 changed_contents
= FALSE
;
2653 changed_relocs
= FALSE
;
2654 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2656 /* Get the section contents. */
2657 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2658 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2661 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2665 irelend
= internal_relocs
+ sec
->reloc_count
;
2666 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2668 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2669 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2671 struct elf_link_hash_entry
*h
;
2673 if (r_type
!= R_386_GOT32
)
2676 /* Get the symbol referred to by the reloc. */
2677 if (r_symndx
< symtab_hdr
->sh_info
)
2679 Elf_Internal_Sym
*isym
;
2681 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2684 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2685 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2686 && irel
->r_offset
>= 2
2687 && bfd_get_8 (input_bfd
,
2688 contents
+ irel
->r_offset
- 2) == 0x8b)
2690 bfd_put_8 (output_bfd
, 0x8d,
2691 contents
+ irel
->r_offset
- 2);
2692 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2693 if (local_got_refcounts
!= NULL
2694 && local_got_refcounts
[r_symndx
] > 0)
2695 local_got_refcounts
[r_symndx
] -= 1;
2696 changed_contents
= TRUE
;
2697 changed_relocs
= TRUE
;
2702 indx
= r_symndx
- symtab_hdr
->sh_info
;
2703 h
= elf_sym_hashes (abfd
)[indx
];
2704 BFD_ASSERT (h
!= NULL
);
2706 while (h
->root
.type
== bfd_link_hash_indirect
2707 || h
->root
.type
== bfd_link_hash_warning
)
2708 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2710 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2711 optimizing _DYNAMIC since ld.so may use its link-time address. */
2713 && h
->type
!= STT_GNU_IFUNC
2714 && h
!= htab
->elf
.hdynamic
2715 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2716 && irel
->r_offset
>= 2
2717 && bfd_get_8 (input_bfd
,
2718 contents
+ irel
->r_offset
- 2) == 0x8b)
2720 bfd_put_8 (output_bfd
, 0x8d,
2721 contents
+ irel
->r_offset
- 2);
2722 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2723 if (h
->got
.refcount
> 0)
2724 h
->got
.refcount
-= 1;
2725 changed_contents
= TRUE
;
2726 changed_relocs
= TRUE
;
2730 if (contents
!= NULL
2731 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2733 if (!changed_contents
&& !link_info
->keep_memory
)
2737 /* Cache the section contents for elf_link_input_bfd. */
2738 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2742 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2744 if (!changed_relocs
)
2745 free (internal_relocs
);
2747 elf_section_data (sec
)->relocs
= internal_relocs
;
2753 if (contents
!= NULL
2754 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2756 if (internal_relocs
!= NULL
2757 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2758 free (internal_relocs
);
2762 /* Set the sizes of the dynamic sections. */
2765 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2767 struct elf_i386_link_hash_table
*htab
;
2773 htab
= elf_i386_hash_table (info
);
2776 dynobj
= htab
->elf
.dynobj
;
2780 if (htab
->elf
.dynamic_sections_created
)
2782 /* Set the contents of the .interp section to the interpreter. */
2783 if (info
->executable
)
2785 s
= bfd_get_linker_section (dynobj
, ".interp");
2788 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2789 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2793 /* Set up .got offsets for local syms, and space for local dynamic
2795 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2797 bfd_signed_vma
*local_got
;
2798 bfd_signed_vma
*end_local_got
;
2799 char *local_tls_type
;
2800 bfd_vma
*local_tlsdesc_gotent
;
2801 bfd_size_type locsymcount
;
2802 Elf_Internal_Shdr
*symtab_hdr
;
2805 if (! is_i386_elf (ibfd
))
2808 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2810 struct elf_dyn_relocs
*p
;
2812 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2815 for (p
= ((struct elf_dyn_relocs
*)
2816 elf_section_data (s
)->local_dynrel
);
2820 if (!bfd_is_abs_section (p
->sec
)
2821 && bfd_is_abs_section (p
->sec
->output_section
))
2823 /* Input section has been discarded, either because
2824 it is a copy of a linkonce section or due to
2825 linker script /DISCARD/, so we'll be discarding
2828 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2829 && strcmp (p
->sec
->output_section
->name
,
2832 /* Relocations in vxworks .tls_vars sections are
2833 handled specially by the loader. */
2835 else if (p
->count
!= 0)
2837 srel
= elf_section_data (p
->sec
)->sreloc
;
2838 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2839 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2840 && (info
->flags
& DF_TEXTREL
) == 0)
2842 info
->flags
|= DF_TEXTREL
;
2843 if (info
->warn_shared_textrel
&& info
->shared
)
2844 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2845 p
->sec
->owner
, p
->sec
);
2851 local_got
= elf_local_got_refcounts (ibfd
);
2855 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2856 locsymcount
= symtab_hdr
->sh_info
;
2857 end_local_got
= local_got
+ locsymcount
;
2858 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2859 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2861 srel
= htab
->elf
.srelgot
;
2862 for (; local_got
< end_local_got
;
2863 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2865 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2868 if (GOT_TLS_GDESC_P (*local_tls_type
))
2870 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2871 - elf_i386_compute_jump_table_size (htab
);
2872 htab
->elf
.sgotplt
->size
+= 8;
2873 *local_got
= (bfd_vma
) -2;
2875 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2876 || GOT_TLS_GD_P (*local_tls_type
))
2878 *local_got
= s
->size
;
2880 if (GOT_TLS_GD_P (*local_tls_type
)
2881 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2885 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2886 || (*local_tls_type
& GOT_TLS_IE
))
2888 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2889 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2890 else if (GOT_TLS_GD_P (*local_tls_type
)
2891 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2892 srel
->size
+= sizeof (Elf32_External_Rel
);
2893 if (GOT_TLS_GDESC_P (*local_tls_type
))
2894 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2898 *local_got
= (bfd_vma
) -1;
2902 if (htab
->tls_ldm_got
.refcount
> 0)
2904 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2906 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2907 htab
->elf
.sgot
->size
+= 8;
2908 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2911 htab
->tls_ldm_got
.offset
= -1;
2913 /* Allocate global sym .plt and .got entries, and space for global
2914 sym dynamic relocs. */
2915 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2917 /* Allocate .plt and .got entries, and space for local symbols. */
2918 htab_traverse (htab
->loc_hash_table
,
2919 elf_i386_allocate_local_dynrelocs
,
2922 /* For every jump slot reserved in the sgotplt, reloc_count is
2923 incremented. However, when we reserve space for TLS descriptors,
2924 it's not incremented, so in order to compute the space reserved
2925 for them, it suffices to multiply the reloc count by the jump
2928 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2929 so that R_386_IRELATIVE entries come last. */
2930 if (htab
->elf
.srelplt
)
2932 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2933 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2934 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2936 else if (htab
->elf
.irelplt
)
2937 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2940 if (htab
->elf
.sgotplt
)
2942 /* Don't allocate .got.plt section if there are no GOT nor PLT
2943 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2944 if ((htab
->elf
.hgot
== NULL
2945 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2946 && (htab
->elf
.sgotplt
->size
2947 == get_elf_backend_data (output_bfd
)->got_header_size
)
2948 && (htab
->elf
.splt
== NULL
2949 || htab
->elf
.splt
->size
== 0)
2950 && (htab
->elf
.sgot
== NULL
2951 || htab
->elf
.sgot
->size
== 0)
2952 && (htab
->elf
.iplt
== NULL
2953 || htab
->elf
.iplt
->size
== 0)
2954 && (htab
->elf
.igotplt
== NULL
2955 || htab
->elf
.igotplt
->size
== 0))
2956 htab
->elf
.sgotplt
->size
= 0;
2960 if (htab
->plt_eh_frame
!= NULL
2961 && htab
->elf
.splt
!= NULL
2962 && htab
->elf
.splt
->size
!= 0
2963 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2964 && _bfd_elf_eh_frame_present (info
))
2965 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2967 /* We now have determined the sizes of the various dynamic sections.
2968 Allocate memory for them. */
2970 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2972 bfd_boolean strip_section
= TRUE
;
2974 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2977 if (s
== htab
->elf
.splt
2978 || s
== htab
->elf
.sgot
)
2980 /* Strip this section if we don't need it; see the
2982 /* We'd like to strip these sections if they aren't needed, but if
2983 we've exported dynamic symbols from them we must leave them.
2984 It's too late to tell BFD to get rid of the symbols. */
2986 if (htab
->elf
.hplt
!= NULL
)
2987 strip_section
= FALSE
;
2989 else if (s
== htab
->elf
.sgotplt
2990 || s
== htab
->elf
.iplt
2991 || s
== htab
->elf
.igotplt
2992 || s
== htab
->plt_got
2993 || s
== htab
->plt_eh_frame
2994 || s
== htab
->sdynbss
)
2996 /* Strip these too. */
2998 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3001 && s
!= htab
->elf
.srelplt
3002 && s
!= htab
->srelplt2
)
3005 /* We use the reloc_count field as a counter if we need
3006 to copy relocs into the output file. */
3011 /* It's not one of our sections, so don't allocate space. */
3017 /* If we don't need this section, strip it from the
3018 output file. This is mostly to handle .rel.bss and
3019 .rel.plt. We must create both sections in
3020 create_dynamic_sections, because they must be created
3021 before the linker maps input sections to output
3022 sections. The linker does that before
3023 adjust_dynamic_symbol is called, and it is that
3024 function which decides whether anything needs to go
3025 into these sections. */
3027 s
->flags
|= SEC_EXCLUDE
;
3031 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3034 /* Allocate memory for the section contents. We use bfd_zalloc
3035 here in case unused entries are not reclaimed before the
3036 section's contents are written out. This should not happen,
3037 but this way if it does, we get a R_386_NONE reloc instead
3039 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3040 if (s
->contents
== NULL
)
3044 if (htab
->plt_eh_frame
!= NULL
3045 && htab
->plt_eh_frame
->contents
!= NULL
)
3047 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3048 sizeof (elf_i386_eh_frame_plt
));
3049 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3050 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3053 if (htab
->elf
.dynamic_sections_created
)
3055 /* Add some entries to the .dynamic section. We fill in the
3056 values later, in elf_i386_finish_dynamic_sections, but we
3057 must add the entries now so that we get the correct size for
3058 the .dynamic section. The DT_DEBUG entry is filled in by the
3059 dynamic linker and used by the debugger. */
3060 #define add_dynamic_entry(TAG, VAL) \
3061 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3063 if (info
->executable
)
3065 if (!add_dynamic_entry (DT_DEBUG
, 0))
3069 if (htab
->elf
.splt
->size
!= 0)
3071 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3072 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3073 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3074 || !add_dynamic_entry (DT_JMPREL
, 0))
3080 if (!add_dynamic_entry (DT_REL
, 0)
3081 || !add_dynamic_entry (DT_RELSZ
, 0)
3082 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3085 /* If any dynamic relocs apply to a read-only section,
3086 then we need a DT_TEXTREL entry. */
3087 if ((info
->flags
& DF_TEXTREL
) == 0)
3088 elf_link_hash_traverse (&htab
->elf
,
3089 elf_i386_readonly_dynrelocs
, info
);
3091 if ((info
->flags
& DF_TEXTREL
) != 0)
3093 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3097 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3098 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3101 #undef add_dynamic_entry
3107 elf_i386_always_size_sections (bfd
*output_bfd
,
3108 struct bfd_link_info
*info
)
3110 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3114 struct elf_link_hash_entry
*tlsbase
;
3116 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3117 "_TLS_MODULE_BASE_",
3118 FALSE
, FALSE
, FALSE
);
3120 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3122 struct elf_i386_link_hash_table
*htab
;
3123 struct bfd_link_hash_entry
*bh
= NULL
;
3124 const struct elf_backend_data
*bed
3125 = get_elf_backend_data (output_bfd
);
3127 htab
= elf_i386_hash_table (info
);
3131 if (!(_bfd_generic_link_add_one_symbol
3132 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3133 tls_sec
, 0, NULL
, FALSE
,
3134 bed
->collect
, &bh
)))
3137 htab
->tls_module_base
= bh
;
3139 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3140 tlsbase
->def_regular
= 1;
3141 tlsbase
->other
= STV_HIDDEN
;
3142 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3149 /* Set the correct type for an x86 ELF section. We do this by the
3150 section name, which is a hack, but ought to work. */
3153 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3154 Elf_Internal_Shdr
*hdr
,
3159 name
= bfd_get_section_name (abfd
, sec
);
3161 /* This is an ugly, but unfortunately necessary hack that is
3162 needed when producing EFI binaries on x86. It tells
3163 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3164 containing ELF relocation info. We need this hack in order to
3165 be able to generate ELF binaries that can be translated into
3166 EFI applications (which are essentially COFF objects). Those
3167 files contain a COFF ".reloc" section inside an ELFNN object,
3168 which would normally cause BFD to segfault because it would
3169 attempt to interpret this section as containing relocation
3170 entries for section "oc". With this hack enabled, ".reloc"
3171 will be treated as a normal data section, which will avoid the
3172 segfault. However, you won't be able to create an ELFNN binary
3173 with a section named "oc" that needs relocations, but that's
3174 the kind of ugly side-effects you get when detecting section
3175 types based on their names... In practice, this limitation is
3176 unlikely to bite. */
3177 if (strcmp (name
, ".reloc") == 0)
3178 hdr
->sh_type
= SHT_PROGBITS
;
3183 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3184 executables. Rather than setting it to the beginning of the TLS
3185 section, we have to set it to the end. This function may be called
3186 multiple times, it is idempotent. */
3189 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3191 struct elf_i386_link_hash_table
*htab
;
3192 struct bfd_link_hash_entry
*base
;
3194 if (!info
->executable
)
3197 htab
= elf_i386_hash_table (info
);
3201 base
= htab
->tls_module_base
;
3205 base
->u
.def
.value
= htab
->elf
.tls_size
;
3208 /* Return the base VMA address which should be subtracted from real addresses
3209 when resolving @dtpoff relocation.
3210 This is PT_TLS segment p_vaddr. */
3213 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3215 /* If tls_sec is NULL, we should have signalled an error already. */
3216 if (elf_hash_table (info
)->tls_sec
== NULL
)
3218 return elf_hash_table (info
)->tls_sec
->vma
;
3221 /* Return the relocation value for @tpoff relocation
3222 if STT_TLS virtual address is ADDRESS. */
3225 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3227 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3228 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3229 bfd_vma static_tls_size
;
3231 /* If tls_sec is NULL, we should have signalled an error already. */
3232 if (htab
->tls_sec
== NULL
)
3235 /* Consider special static TLS alignment requirements. */
3236 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3237 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3240 /* Relocate an i386 ELF section. */
3243 elf_i386_relocate_section (bfd
*output_bfd
,
3244 struct bfd_link_info
*info
,
3246 asection
*input_section
,
3248 Elf_Internal_Rela
*relocs
,
3249 Elf_Internal_Sym
*local_syms
,
3250 asection
**local_sections
)
3252 struct elf_i386_link_hash_table
*htab
;
3253 Elf_Internal_Shdr
*symtab_hdr
;
3254 struct elf_link_hash_entry
**sym_hashes
;
3255 bfd_vma
*local_got_offsets
;
3256 bfd_vma
*local_tlsdesc_gotents
;
3257 Elf_Internal_Rela
*rel
;
3258 Elf_Internal_Rela
*relend
;
3259 bfd_boolean is_vxworks_tls
;
3260 unsigned plt_entry_size
;
3262 BFD_ASSERT (is_i386_elf (input_bfd
));
3264 htab
= elf_i386_hash_table (info
);
3267 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3268 sym_hashes
= elf_sym_hashes (input_bfd
);
3269 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3270 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3271 /* We have to handle relocations in vxworks .tls_vars sections
3272 specially, because the dynamic loader is 'weird'. */
3273 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3275 && !strcmp (input_section
->output_section
->name
,
3278 elf_i386_set_tls_module_base (info
);
3280 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3283 relend
= relocs
+ input_section
->reloc_count
;
3284 for (; rel
< relend
; rel
++)
3286 unsigned int r_type
;
3287 reloc_howto_type
*howto
;
3288 unsigned long r_symndx
;
3289 struct elf_link_hash_entry
*h
;
3290 struct elf_i386_link_hash_entry
*eh
;
3291 Elf_Internal_Sym
*sym
;
3293 bfd_vma off
, offplt
, plt_offset
;
3295 bfd_boolean unresolved_reloc
;
3296 bfd_reloc_status_type r
;
3300 asection
*resolved_plt
;
3302 r_type
= ELF32_R_TYPE (rel
->r_info
);
3303 if (r_type
== R_386_GNU_VTINHERIT
3304 || r_type
== R_386_GNU_VTENTRY
)
3307 if ((indx
= r_type
) >= R_386_standard
3308 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3309 >= R_386_ext
- R_386_standard
)
3310 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3311 >= R_386_irelative
- R_386_ext
))
3313 (*_bfd_error_handler
)
3314 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3315 input_bfd
, input_section
, r_type
);
3316 bfd_set_error (bfd_error_bad_value
);
3319 howto
= elf_howto_table
+ indx
;
3321 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3325 unresolved_reloc
= FALSE
;
3326 if (r_symndx
< symtab_hdr
->sh_info
)
3328 sym
= local_syms
+ r_symndx
;
3329 sec
= local_sections
[r_symndx
];
3330 relocation
= (sec
->output_section
->vma
3331 + sec
->output_offset
3333 st_size
= sym
->st_size
;
3335 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3336 && ((sec
->flags
& SEC_MERGE
) != 0
3337 || (info
->relocatable
3338 && sec
->output_offset
!= 0)))
3341 bfd_byte
*where
= contents
+ rel
->r_offset
;
3343 switch (howto
->size
)
3346 addend
= bfd_get_8 (input_bfd
, where
);
3347 if (howto
->pc_relative
)
3349 addend
= (addend
^ 0x80) - 0x80;
3354 addend
= bfd_get_16 (input_bfd
, where
);
3355 if (howto
->pc_relative
)
3357 addend
= (addend
^ 0x8000) - 0x8000;
3362 addend
= bfd_get_32 (input_bfd
, where
);
3363 if (howto
->pc_relative
)
3365 addend
= (addend
^ 0x80000000) - 0x80000000;
3373 if (info
->relocatable
)
3374 addend
+= sec
->output_offset
;
3377 asection
*msec
= sec
;
3378 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3380 addend
-= relocation
;
3381 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3384 switch (howto
->size
)
3387 /* FIXME: overflow checks. */
3388 if (howto
->pc_relative
)
3390 bfd_put_8 (input_bfd
, addend
, where
);
3393 if (howto
->pc_relative
)
3395 bfd_put_16 (input_bfd
, addend
, where
);
3398 if (howto
->pc_relative
)
3400 bfd_put_32 (input_bfd
, addend
, where
);
3404 else if (!info
->relocatable
3405 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3407 /* Relocate against local STT_GNU_IFUNC symbol. */
3408 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3413 /* Set STT_GNU_IFUNC symbol value. */
3414 h
->root
.u
.def
.value
= sym
->st_value
;
3415 h
->root
.u
.def
.section
= sec
;
3420 bfd_boolean warned ATTRIBUTE_UNUSED
;
3421 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3423 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3424 r_symndx
, symtab_hdr
, sym_hashes
,
3426 unresolved_reloc
, warned
, ignored
);
3430 if (sec
!= NULL
&& discarded_section (sec
))
3431 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3432 rel
, 1, relend
, howto
, 0, contents
);
3434 if (info
->relocatable
)
3437 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3438 it here if it is defined in a non-shared object. */
3440 && h
->type
== STT_GNU_IFUNC
3443 asection
*plt
, *gotplt
, *base_got
;
3447 if ((input_section
->flags
& SEC_ALLOC
) == 0
3448 || h
->plt
.offset
== (bfd_vma
) -1)
3451 /* STT_GNU_IFUNC symbol must go through PLT. */
3452 if (htab
->elf
.splt
!= NULL
)
3454 plt
= htab
->elf
.splt
;
3455 gotplt
= htab
->elf
.sgotplt
;
3459 plt
= htab
->elf
.iplt
;
3460 gotplt
= htab
->elf
.igotplt
;
3463 relocation
= (plt
->output_section
->vma
3464 + plt
->output_offset
+ h
->plt
.offset
);
3469 if (h
->root
.root
.string
)
3470 name
= h
->root
.root
.string
;
3472 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3474 (*_bfd_error_handler
)
3475 (_("%B: relocation %s against STT_GNU_IFUNC "
3476 "symbol `%s' isn't handled by %s"), input_bfd
,
3477 elf_howto_table
[r_type
].name
,
3478 name
, __FUNCTION__
);
3479 bfd_set_error (bfd_error_bad_value
);
3483 /* Generate dynamic relcoation only when there is a
3484 non-GOT reference in a shared object. */
3485 if (info
->shared
&& h
->non_got_ref
)
3487 Elf_Internal_Rela outrel
;
3491 /* Need a dynamic relocation to get the real function
3493 offset
= _bfd_elf_section_offset (output_bfd
,
3497 if (offset
== (bfd_vma
) -1
3498 || offset
== (bfd_vma
) -2)
3501 outrel
.r_offset
= (input_section
->output_section
->vma
3502 + input_section
->output_offset
3505 if (h
->dynindx
== -1
3507 || info
->executable
)
3509 /* This symbol is resolved locally. */
3510 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3511 bfd_put_32 (output_bfd
,
3512 (h
->root
.u
.def
.value
3513 + h
->root
.u
.def
.section
->output_section
->vma
3514 + h
->root
.u
.def
.section
->output_offset
),
3518 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3520 sreloc
= htab
->elf
.irelifunc
;
3521 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3523 /* If this reloc is against an external symbol, we
3524 do not want to fiddle with the addend. Otherwise,
3525 we need to include the symbol value so that it
3526 becomes an addend for the dynamic reloc. For an
3527 internal symbol, we have updated addend. */
3536 base_got
= htab
->elf
.sgot
;
3537 off
= h
->got
.offset
;
3539 if (base_got
== NULL
)
3542 if (off
== (bfd_vma
) -1)
3544 /* We can't use h->got.offset here to save state, or
3545 even just remember the offset, as finish_dynamic_symbol
3546 would use that as offset into .got. */
3548 if (htab
->elf
.splt
!= NULL
)
3550 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3551 off
= (plt_index
+ 3) * 4;
3552 base_got
= htab
->elf
.sgotplt
;
3556 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3557 off
= plt_index
* 4;
3558 base_got
= htab
->elf
.igotplt
;
3561 if (h
->dynindx
== -1
3565 /* This references the local defitionion. We must
3566 initialize this entry in the global offset table.
3567 Since the offset must always be a multiple of 8,
3568 we use the least significant bit to record
3569 whether we have initialized it already.
3571 When doing a dynamic link, we create a .rela.got
3572 relocation entry to initialize the value. This
3573 is done in the finish_dynamic_symbol routine. */
3578 bfd_put_32 (output_bfd
, relocation
,
3579 base_got
->contents
+ off
);
3586 /* Adjust for static executables. */
3587 if (htab
->elf
.splt
== NULL
)
3588 relocation
+= gotplt
->output_offset
;
3592 relocation
= (base_got
->output_section
->vma
3593 + base_got
->output_offset
+ off
3594 - gotplt
->output_section
->vma
3595 - gotplt
->output_offset
);
3596 /* Adjust for static executables. */
3597 if (htab
->elf
.splt
== NULL
)
3598 relocation
+= gotplt
->output_offset
;
3604 relocation
-= (gotplt
->output_section
->vma
3605 + gotplt
->output_offset
);
3613 /* Relocation is to the entry for this symbol in the global
3615 if (htab
->elf
.sgot
== NULL
)
3622 off
= h
->got
.offset
;
3623 dyn
= htab
->elf
.dynamic_sections_created
;
3624 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3626 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3627 || (ELF_ST_VISIBILITY (h
->other
)
3628 && h
->root
.type
== bfd_link_hash_undefweak
))
3630 /* This is actually a static link, or it is a
3631 -Bsymbolic link and the symbol is defined
3632 locally, or the symbol was forced to be local
3633 because of a version file. We must initialize
3634 this entry in the global offset table. Since the
3635 offset must always be a multiple of 4, we use the
3636 least significant bit to record whether we have
3637 initialized it already.
3639 When doing a dynamic link, we create a .rel.got
3640 relocation entry to initialize the value. This
3641 is done in the finish_dynamic_symbol routine. */
3646 bfd_put_32 (output_bfd
, relocation
,
3647 htab
->elf
.sgot
->contents
+ off
);
3652 unresolved_reloc
= FALSE
;
3656 if (local_got_offsets
== NULL
)
3659 off
= local_got_offsets
[r_symndx
];
3661 /* The offset must always be a multiple of 4. We use
3662 the least significant bit to record whether we have
3663 already generated the necessary reloc. */
3668 bfd_put_32 (output_bfd
, relocation
,
3669 htab
->elf
.sgot
->contents
+ off
);
3674 Elf_Internal_Rela outrel
;
3676 s
= htab
->elf
.srelgot
;
3680 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3681 + htab
->elf
.sgot
->output_offset
3683 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3684 elf_append_rel (output_bfd
, s
, &outrel
);
3687 local_got_offsets
[r_symndx
] |= 1;
3691 if (off
>= (bfd_vma
) -2)
3694 relocation
= htab
->elf
.sgot
->output_section
->vma
3695 + htab
->elf
.sgot
->output_offset
+ off
3696 - htab
->elf
.sgotplt
->output_section
->vma
3697 - htab
->elf
.sgotplt
->output_offset
;
3701 /* Relocation is relative to the start of the global offset
3704 /* Check to make sure it isn't a protected function symbol
3705 for shared library since it may not be local when used
3706 as function address. We also need to make sure that a
3707 symbol is defined locally. */
3708 if (info
->shared
&& h
)
3710 if (!h
->def_regular
)
3714 switch (ELF_ST_VISIBILITY (h
->other
))
3717 v
= _("hidden symbol");
3720 v
= _("internal symbol");
3723 v
= _("protected symbol");
3730 (*_bfd_error_handler
)
3731 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3732 input_bfd
, v
, h
->root
.root
.string
);
3733 bfd_set_error (bfd_error_bad_value
);
3736 else if (!info
->executable
3737 && !SYMBOLIC_BIND (info
, h
)
3738 && h
->type
== STT_FUNC
3739 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3741 (*_bfd_error_handler
)
3742 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3743 input_bfd
, h
->root
.root
.string
);
3744 bfd_set_error (bfd_error_bad_value
);
3749 /* Note that sgot is not involved in this
3750 calculation. We always want the start of .got.plt. If we
3751 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3752 permitted by the ABI, we might have to change this
3754 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3755 + htab
->elf
.sgotplt
->output_offset
;
3759 /* Use global offset table as symbol value. */
3760 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3761 + htab
->elf
.sgotplt
->output_offset
;
3762 unresolved_reloc
= FALSE
;
3766 /* Relocation is to the entry for this symbol in the
3767 procedure linkage table. */
3769 /* Resolve a PLT32 reloc against a local symbol directly,
3770 without using the procedure linkage table. */
3774 eh
= (struct elf_i386_link_hash_entry
*) h
;
3775 if ((h
->plt
.offset
== (bfd_vma
) -1
3776 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3777 || htab
->elf
.splt
== NULL
)
3779 /* We didn't make a PLT entry for this symbol. This
3780 happens when statically linking PIC code, or when
3781 using -Bsymbolic. */
3785 if (h
->plt
.offset
!= (bfd_vma
) -1)
3787 resolved_plt
= htab
->elf
.splt
;
3788 plt_offset
= h
->plt
.offset
;
3792 resolved_plt
= htab
->plt_got
;
3793 plt_offset
= eh
->plt_got
.offset
;
3796 relocation
= (resolved_plt
->output_section
->vma
3797 + resolved_plt
->output_offset
3799 unresolved_reloc
= FALSE
;
3803 /* Set to symbol size. */
3804 relocation
= st_size
;
3809 if ((input_section
->flags
& SEC_ALLOC
) == 0
3815 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3816 || h
->root
.type
!= bfd_link_hash_undefweak
)
3817 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3818 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3819 || (ELIMINATE_COPY_RELOCS
3826 || h
->root
.type
== bfd_link_hash_undefweak
3827 || h
->root
.type
== bfd_link_hash_undefined
)))
3829 Elf_Internal_Rela outrel
;
3830 bfd_boolean skip
, relocate
;
3833 /* When generating a shared object, these relocations
3834 are copied into the output file to be resolved at run
3841 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3843 if (outrel
.r_offset
== (bfd_vma
) -1)
3845 else if (outrel
.r_offset
== (bfd_vma
) -2)
3846 skip
= TRUE
, relocate
= TRUE
;
3847 outrel
.r_offset
+= (input_section
->output_section
->vma
3848 + input_section
->output_offset
);
3851 memset (&outrel
, 0, sizeof outrel
);
3854 && (r_type
== R_386_PC32
3856 || !SYMBOLIC_BIND (info
, h
)
3857 || !h
->def_regular
))
3858 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3861 /* This symbol is local, or marked to become local. */
3863 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3866 sreloc
= elf_section_data (input_section
)->sreloc
;
3868 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3870 r
= bfd_reloc_notsupported
;
3871 goto check_relocation_error
;
3874 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3876 /* If this reloc is against an external symbol, we do
3877 not want to fiddle with the addend. Otherwise, we
3878 need to include the symbol value so that it becomes
3879 an addend for the dynamic reloc. */
3886 if (!info
->executable
)
3888 Elf_Internal_Rela outrel
;
3891 outrel
.r_offset
= rel
->r_offset
3892 + input_section
->output_section
->vma
3893 + input_section
->output_offset
;
3894 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3895 sreloc
= elf_section_data (input_section
)->sreloc
;
3898 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3903 case R_386_TLS_GOTDESC
:
3904 case R_386_TLS_DESC_CALL
:
3905 case R_386_TLS_IE_32
:
3906 case R_386_TLS_GOTIE
:
3907 tls_type
= GOT_UNKNOWN
;
3908 if (h
== NULL
&& local_got_offsets
)
3909 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3911 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3912 if (tls_type
== GOT_TLS_IE
)
3913 tls_type
= GOT_TLS_IE_NEG
;
3915 if (! elf_i386_tls_transition (info
, input_bfd
,
3916 input_section
, contents
,
3917 symtab_hdr
, sym_hashes
,
3918 &r_type
, tls_type
, rel
,
3919 relend
, h
, r_symndx
))
3922 if (r_type
== R_386_TLS_LE_32
)
3924 BFD_ASSERT (! unresolved_reloc
);
3925 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3930 /* GD->LE transition. */
3931 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3934 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3936 movl %gs:0, %eax; subl $foo@tpoff, %eax
3937 (6 byte form of subl). */
3938 memcpy (contents
+ rel
->r_offset
- 3,
3939 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3940 roff
= rel
->r_offset
+ 5;
3944 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3946 movl %gs:0, %eax; subl $foo@tpoff, %eax
3947 (6 byte form of subl). */
3948 memcpy (contents
+ rel
->r_offset
- 2,
3949 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3950 roff
= rel
->r_offset
+ 6;
3952 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3954 /* Skip R_386_PC32/R_386_PLT32. */
3958 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3960 /* GDesc -> LE transition.
3961 It's originally something like:
3962 leal x@tlsdesc(%ebx), %eax
3966 Registers other than %eax may be set up here. */
3971 roff
= rel
->r_offset
;
3972 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3974 /* Now modify the instruction as appropriate. */
3975 /* aoliva FIXME: remove the above and xor the byte
3977 bfd_put_8 (output_bfd
, val
^ 0x86,
3978 contents
+ roff
- 1);
3979 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3983 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3985 /* GDesc -> LE transition.
3993 roff
= rel
->r_offset
;
3994 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3995 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3998 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4002 /* IE->LE transition:
4003 Originally it can be one of:
4011 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4014 /* movl foo, %eax. */
4015 bfd_put_8 (output_bfd
, 0xb8,
4016 contents
+ rel
->r_offset
- 1);
4022 type
= bfd_get_8 (input_bfd
,
4023 contents
+ rel
->r_offset
- 2);
4028 bfd_put_8 (output_bfd
, 0xc7,
4029 contents
+ rel
->r_offset
- 2);
4030 bfd_put_8 (output_bfd
,
4031 0xc0 | ((val
>> 3) & 7),
4032 contents
+ rel
->r_offset
- 1);
4036 bfd_put_8 (output_bfd
, 0x81,
4037 contents
+ rel
->r_offset
- 2);
4038 bfd_put_8 (output_bfd
,
4039 0xc0 | ((val
>> 3) & 7),
4040 contents
+ rel
->r_offset
- 1);
4047 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4048 contents
+ rel
->r_offset
);
4053 unsigned int val
, type
;
4055 /* {IE_32,GOTIE}->LE transition:
4056 Originally it can be one of:
4057 subl foo(%reg1), %reg2
4058 movl foo(%reg1), %reg2
4059 addl foo(%reg1), %reg2
4062 movl $foo, %reg2 (6 byte form)
4063 addl $foo, %reg2. */
4064 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4065 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4069 bfd_put_8 (output_bfd
, 0xc7,
4070 contents
+ rel
->r_offset
- 2);
4071 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4072 contents
+ rel
->r_offset
- 1);
4074 else if (type
== 0x2b)
4077 bfd_put_8 (output_bfd
, 0x81,
4078 contents
+ rel
->r_offset
- 2);
4079 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4080 contents
+ rel
->r_offset
- 1);
4082 else if (type
== 0x03)
4085 bfd_put_8 (output_bfd
, 0x81,
4086 contents
+ rel
->r_offset
- 2);
4087 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4088 contents
+ rel
->r_offset
- 1);
4092 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4093 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4094 contents
+ rel
->r_offset
);
4096 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4097 contents
+ rel
->r_offset
);
4102 if (htab
->elf
.sgot
== NULL
)
4107 off
= h
->got
.offset
;
4108 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4112 if (local_got_offsets
== NULL
)
4115 off
= local_got_offsets
[r_symndx
];
4116 offplt
= local_tlsdesc_gotents
[r_symndx
];
4123 Elf_Internal_Rela outrel
;
4127 if (htab
->elf
.srelgot
== NULL
)
4130 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4132 if (GOT_TLS_GDESC_P (tls_type
))
4135 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4136 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4137 <= htab
->elf
.sgotplt
->size
);
4138 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4139 + htab
->elf
.sgotplt
->output_offset
4141 + htab
->sgotplt_jump_table_size
);
4142 sreloc
= htab
->elf
.srelplt
;
4143 loc
= sreloc
->contents
;
4144 loc
+= (htab
->next_tls_desc_index
++
4145 * sizeof (Elf32_External_Rel
));
4146 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4147 <= sreloc
->contents
+ sreloc
->size
);
4148 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4151 BFD_ASSERT (! unresolved_reloc
);
4152 bfd_put_32 (output_bfd
,
4153 relocation
- elf_i386_dtpoff_base (info
),
4154 htab
->elf
.sgotplt
->contents
+ offplt
4155 + htab
->sgotplt_jump_table_size
+ 4);
4159 bfd_put_32 (output_bfd
, 0,
4160 htab
->elf
.sgotplt
->contents
+ offplt
4161 + htab
->sgotplt_jump_table_size
+ 4);
4165 sreloc
= htab
->elf
.srelgot
;
4167 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4168 + htab
->elf
.sgot
->output_offset
+ off
);
4170 if (GOT_TLS_GD_P (tls_type
))
4171 dr_type
= R_386_TLS_DTPMOD32
;
4172 else if (GOT_TLS_GDESC_P (tls_type
))
4174 else if (tls_type
== GOT_TLS_IE_POS
)
4175 dr_type
= R_386_TLS_TPOFF
;
4177 dr_type
= R_386_TLS_TPOFF32
;
4179 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4180 bfd_put_32 (output_bfd
,
4181 relocation
- elf_i386_dtpoff_base (info
),
4182 htab
->elf
.sgot
->contents
+ off
);
4183 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4184 bfd_put_32 (output_bfd
,
4185 elf_i386_dtpoff_base (info
) - relocation
,
4186 htab
->elf
.sgot
->contents
+ off
);
4187 else if (dr_type
!= R_386_TLS_DESC
)
4188 bfd_put_32 (output_bfd
, 0,
4189 htab
->elf
.sgot
->contents
+ off
);
4190 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4192 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4194 if (GOT_TLS_GD_P (tls_type
))
4198 BFD_ASSERT (! unresolved_reloc
);
4199 bfd_put_32 (output_bfd
,
4200 relocation
- elf_i386_dtpoff_base (info
),
4201 htab
->elf
.sgot
->contents
+ off
+ 4);
4205 bfd_put_32 (output_bfd
, 0,
4206 htab
->elf
.sgot
->contents
+ off
+ 4);
4207 outrel
.r_info
= ELF32_R_INFO (indx
,
4208 R_386_TLS_DTPOFF32
);
4209 outrel
.r_offset
+= 4;
4210 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4213 else if (tls_type
== GOT_TLS_IE_BOTH
)
4215 bfd_put_32 (output_bfd
,
4217 ? relocation
- elf_i386_dtpoff_base (info
)
4219 htab
->elf
.sgot
->contents
+ off
+ 4);
4220 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4221 outrel
.r_offset
+= 4;
4222 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4229 local_got_offsets
[r_symndx
] |= 1;
4232 if (off
>= (bfd_vma
) -2
4233 && ! GOT_TLS_GDESC_P (tls_type
))
4235 if (r_type
== R_386_TLS_GOTDESC
4236 || r_type
== R_386_TLS_DESC_CALL
)
4238 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4239 unresolved_reloc
= FALSE
;
4241 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4243 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4244 + htab
->elf
.sgotplt
->output_offset
;
4245 relocation
= htab
->elf
.sgot
->output_section
->vma
4246 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4247 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4248 && tls_type
== GOT_TLS_IE_BOTH
)
4250 if (r_type
== R_386_TLS_IE
)
4251 relocation
+= g_o_t
;
4252 unresolved_reloc
= FALSE
;
4254 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4256 unsigned int val
, type
;
4259 /* GD->IE transition. */
4260 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4261 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4264 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4266 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4268 roff
= rel
->r_offset
- 3;
4272 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4274 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4275 roff
= rel
->r_offset
- 2;
4277 memcpy (contents
+ roff
,
4278 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4279 contents
[roff
+ 7] = 0x80 | (val
& 7);
4280 /* If foo is used only with foo@gotntpoff(%reg) and
4281 foo@indntpoff, but not with foo@gottpoff(%reg), change
4282 subl $foo@gottpoff(%reg), %eax
4284 addl $foo@gotntpoff(%reg), %eax. */
4285 if (tls_type
== GOT_TLS_IE_POS
)
4286 contents
[roff
+ 6] = 0x03;
4287 bfd_put_32 (output_bfd
,
4288 htab
->elf
.sgot
->output_section
->vma
4289 + htab
->elf
.sgot
->output_offset
+ off
4290 - htab
->elf
.sgotplt
->output_section
->vma
4291 - htab
->elf
.sgotplt
->output_offset
,
4292 contents
+ roff
+ 8);
4293 /* Skip R_386_PLT32. */
4297 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4299 /* GDesc -> IE transition.
4300 It's originally something like:
4301 leal x@tlsdesc(%ebx), %eax
4304 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4306 movl x@gottpoff(%ebx), %eax # before negl %eax
4308 Registers other than %eax may be set up here. */
4312 /* First, make sure it's a leal adding ebx to a 32-bit
4313 offset into any register, although it's probably
4314 almost always going to be eax. */
4315 roff
= rel
->r_offset
;
4317 /* Now modify the instruction as appropriate. */
4318 /* To turn a leal into a movl in the form we use it, it
4319 suffices to change the first byte from 0x8d to 0x8b.
4320 aoliva FIXME: should we decide to keep the leal, all
4321 we have to do is remove the statement below, and
4322 adjust the relaxation of R_386_TLS_DESC_CALL. */
4323 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4325 if (tls_type
== GOT_TLS_IE_BOTH
)
4328 bfd_put_32 (output_bfd
,
4329 htab
->elf
.sgot
->output_section
->vma
4330 + htab
->elf
.sgot
->output_offset
+ off
4331 - htab
->elf
.sgotplt
->output_section
->vma
4332 - htab
->elf
.sgotplt
->output_offset
,
4336 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4338 /* GDesc -> IE transition.
4346 depending on how we transformed the TLS_GOTDESC above.
4351 roff
= rel
->r_offset
;
4353 /* Now modify the instruction as appropriate. */
4354 if (tls_type
!= GOT_TLS_IE_NEG
)
4357 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4358 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4363 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4364 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4374 if (! elf_i386_tls_transition (info
, input_bfd
,
4375 input_section
, contents
,
4376 symtab_hdr
, sym_hashes
,
4377 &r_type
, GOT_UNKNOWN
, rel
,
4378 relend
, h
, r_symndx
))
4381 if (r_type
!= R_386_TLS_LDM
)
4383 /* LD->LE transition:
4384 leal foo(%reg), %eax; call ___tls_get_addr.
4386 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4387 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4388 memcpy (contents
+ rel
->r_offset
- 2,
4389 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4390 /* Skip R_386_PC32/R_386_PLT32. */
4395 if (htab
->elf
.sgot
== NULL
)
4398 off
= htab
->tls_ldm_got
.offset
;
4403 Elf_Internal_Rela outrel
;
4405 if (htab
->elf
.srelgot
== NULL
)
4408 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4409 + htab
->elf
.sgot
->output_offset
+ off
);
4411 bfd_put_32 (output_bfd
, 0,
4412 htab
->elf
.sgot
->contents
+ off
);
4413 bfd_put_32 (output_bfd
, 0,
4414 htab
->elf
.sgot
->contents
+ off
+ 4);
4415 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4416 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4417 htab
->tls_ldm_got
.offset
|= 1;
4419 relocation
= htab
->elf
.sgot
->output_section
->vma
4420 + htab
->elf
.sgot
->output_offset
+ off
4421 - htab
->elf
.sgotplt
->output_section
->vma
4422 - htab
->elf
.sgotplt
->output_offset
;
4423 unresolved_reloc
= FALSE
;
4426 case R_386_TLS_LDO_32
:
4427 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4428 relocation
-= elf_i386_dtpoff_base (info
);
4430 /* When converting LDO to LE, we must negate. */
4431 relocation
= -elf_i386_tpoff (info
, relocation
);
4434 case R_386_TLS_LE_32
:
4436 if (!info
->executable
)
4438 Elf_Internal_Rela outrel
;
4441 outrel
.r_offset
= rel
->r_offset
4442 + input_section
->output_section
->vma
4443 + input_section
->output_offset
;
4444 if (h
!= NULL
&& h
->dynindx
!= -1)
4448 if (r_type
== R_386_TLS_LE_32
)
4449 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4451 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4452 sreloc
= elf_section_data (input_section
)->sreloc
;
4455 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4458 else if (r_type
== R_386_TLS_LE_32
)
4459 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4461 relocation
-= elf_i386_dtpoff_base (info
);
4463 else if (r_type
== R_386_TLS_LE_32
)
4464 relocation
= elf_i386_tpoff (info
, relocation
);
4466 relocation
= -elf_i386_tpoff (info
, relocation
);
4473 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4474 because such sections are not SEC_ALLOC and thus ld.so will
4475 not process them. */
4476 if (unresolved_reloc
4477 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4479 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4480 rel
->r_offset
) != (bfd_vma
) -1)
4482 (*_bfd_error_handler
)
4483 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4486 (long) rel
->r_offset
,
4488 h
->root
.root
.string
);
4493 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4494 contents
, rel
->r_offset
,
4497 check_relocation_error
:
4498 if (r
!= bfd_reloc_ok
)
4503 name
= h
->root
.root
.string
;
4506 name
= bfd_elf_string_from_elf_section (input_bfd
,
4507 symtab_hdr
->sh_link
,
4512 name
= bfd_section_name (input_bfd
, sec
);
4515 if (r
== bfd_reloc_overflow
)
4517 if (! ((*info
->callbacks
->reloc_overflow
)
4518 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4519 (bfd_vma
) 0, input_bfd
, input_section
,
4525 (*_bfd_error_handler
)
4526 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4527 input_bfd
, input_section
,
4528 (long) rel
->r_offset
, name
, (int) r
);
4537 /* Finish up dynamic symbol handling. We set the contents of various
4538 dynamic sections here. */
4541 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4542 struct bfd_link_info
*info
,
4543 struct elf_link_hash_entry
*h
,
4544 Elf_Internal_Sym
*sym
)
4546 struct elf_i386_link_hash_table
*htab
;
4547 unsigned plt_entry_size
;
4548 const struct elf_i386_backend_data
*abed
;
4549 struct elf_i386_link_hash_entry
*eh
;
4551 htab
= elf_i386_hash_table (info
);
4555 abed
= get_elf_i386_backend_data (output_bfd
);
4556 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4558 eh
= (struct elf_i386_link_hash_entry
*) h
;
4560 if (h
->plt
.offset
!= (bfd_vma
) -1)
4564 Elf_Internal_Rela rel
;
4566 asection
*plt
, *gotplt
, *relplt
;
4568 /* When building a static executable, use .iplt, .igot.plt and
4569 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4570 if (htab
->elf
.splt
!= NULL
)
4572 plt
= htab
->elf
.splt
;
4573 gotplt
= htab
->elf
.sgotplt
;
4574 relplt
= htab
->elf
.srelplt
;
4578 plt
= htab
->elf
.iplt
;
4579 gotplt
= htab
->elf
.igotplt
;
4580 relplt
= htab
->elf
.irelplt
;
4583 /* This symbol has an entry in the procedure linkage table. Set
4586 if ((h
->dynindx
== -1
4587 && !((h
->forced_local
|| info
->executable
)
4589 && h
->type
== STT_GNU_IFUNC
))
4595 /* Get the index in the procedure linkage table which
4596 corresponds to this symbol. This is the index of this symbol
4597 in all the symbols for which we are making plt entries. The
4598 first entry in the procedure linkage table is reserved.
4600 Get the offset into the .got table of the entry that
4601 corresponds to this function. Each .got entry is 4 bytes.
4602 The first three are reserved.
4604 For static executables, we don't reserve anything. */
4606 if (plt
== htab
->elf
.splt
)
4608 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4609 got_offset
= (got_offset
+ 3) * 4;
4613 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4614 got_offset
= got_offset
* 4;
4617 /* Fill in the entry in the procedure linkage table. */
4620 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4621 abed
->plt
->plt_entry_size
);
4622 bfd_put_32 (output_bfd
,
4623 (gotplt
->output_section
->vma
4624 + gotplt
->output_offset
4626 plt
->contents
+ h
->plt
.offset
4627 + abed
->plt
->plt_got_offset
);
4629 if (abed
->is_vxworks
)
4631 int s
, k
, reloc_index
;
4633 /* Create the R_386_32 relocation referencing the GOT
4634 for this PLT entry. */
4636 /* S: Current slot number (zero-based). */
4637 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4638 / abed
->plt
->plt_entry_size
);
4639 /* K: Number of relocations for PLTResolve. */
4641 k
= PLTRESOLVE_RELOCS_SHLIB
;
4643 k
= PLTRESOLVE_RELOCS
;
4644 /* Skip the PLTresolve relocations, and the relocations for
4645 the other PLT slots. */
4646 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4647 loc
= (htab
->srelplt2
->contents
+ reloc_index
4648 * sizeof (Elf32_External_Rel
));
4650 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4651 + htab
->elf
.splt
->output_offset
4652 + h
->plt
.offset
+ 2),
4653 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4654 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4656 /* Create the R_386_32 relocation referencing the beginning of
4657 the PLT for this GOT entry. */
4658 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4659 + htab
->elf
.sgotplt
->output_offset
4661 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4662 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4663 loc
+ sizeof (Elf32_External_Rel
));
4668 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4669 abed
->plt
->plt_entry_size
);
4670 bfd_put_32 (output_bfd
, got_offset
,
4671 plt
->contents
+ h
->plt
.offset
4672 + abed
->plt
->plt_got_offset
);
4675 /* Fill in the entry in the global offset table. */
4676 bfd_put_32 (output_bfd
,
4677 (plt
->output_section
->vma
4678 + plt
->output_offset
4680 + abed
->plt
->plt_lazy_offset
),
4681 gotplt
->contents
+ got_offset
);
4683 /* Fill in the entry in the .rel.plt section. */
4684 rel
.r_offset
= (gotplt
->output_section
->vma
4685 + gotplt
->output_offset
4687 if (h
->dynindx
== -1
4688 || ((info
->executable
4689 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4691 && h
->type
== STT_GNU_IFUNC
))
4693 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4694 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4695 in the .got.plt section. */
4696 bfd_put_32 (output_bfd
,
4697 (h
->root
.u
.def
.value
4698 + h
->root
.u
.def
.section
->output_section
->vma
4699 + h
->root
.u
.def
.section
->output_offset
),
4700 gotplt
->contents
+ got_offset
);
4701 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4702 /* R_386_IRELATIVE comes last. */
4703 plt_index
= htab
->next_irelative_index
--;
4707 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4708 plt_index
= htab
->next_jump_slot_index
++;
4710 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4711 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4713 /* Don't fill PLT entry for static executables. */
4714 if (plt
== htab
->elf
.splt
)
4716 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4717 plt
->contents
+ h
->plt
.offset
4718 + abed
->plt
->plt_reloc_offset
);
4719 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4720 + abed
->plt
->plt_plt_offset
+ 4),
4721 plt
->contents
+ h
->plt
.offset
4722 + abed
->plt
->plt_plt_offset
);
4725 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4727 bfd_vma got_offset
, plt_offset
;
4728 asection
*plt
, *got
, *gotplt
;
4729 const bfd_byte
*got_plt_entry
;
4731 /* Offset of displacement of the indirect jump. */
4732 bfd_vma plt_got_offset
= 2;
4734 /* Set the entry in the GOT procedure linkage table. */
4735 plt
= htab
->plt_got
;
4736 got
= htab
->elf
.sgot
;
4737 gotplt
= htab
->elf
.sgotplt
;
4738 got_offset
= h
->got
.offset
;
4740 if (got_offset
== (bfd_vma
) -1
4746 /* Fill in the entry in the GOT procedure linkage table. */
4749 got_plt_entry
= elf_i386_got_plt_entry
;
4750 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4754 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4755 got_offset
+= (got
->output_section
->vma
4756 + got
->output_offset
4757 - gotplt
->output_section
->vma
4758 - gotplt
->output_offset
);
4761 plt_offset
= eh
->plt_got
.offset
;
4762 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4763 sizeof (elf_i386_got_plt_entry
));
4764 bfd_put_32 (output_bfd
, got_offset
,
4765 plt
->contents
+ plt_offset
+ plt_got_offset
);
4769 && (h
->plt
.offset
!= (bfd_vma
) -1
4770 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4772 /* Mark the symbol as undefined, rather than as defined in
4773 the .plt section. Leave the value if there were any
4774 relocations where pointer equality matters (this is a clue
4775 for the dynamic linker, to make function pointer
4776 comparisons work between an application and shared
4777 library), otherwise set it to zero. If a function is only
4778 called from a binary, there is no need to slow down
4779 shared libraries because of that. */
4780 sym
->st_shndx
= SHN_UNDEF
;
4781 if (!h
->pointer_equality_needed
)
4785 if (h
->got
.offset
!= (bfd_vma
) -1
4786 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4787 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4789 Elf_Internal_Rela rel
;
4791 /* This symbol has an entry in the global offset table. Set it
4794 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4797 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4798 + htab
->elf
.sgot
->output_offset
4799 + (h
->got
.offset
& ~(bfd_vma
) 1));
4801 /* If this is a static link, or it is a -Bsymbolic link and the
4802 symbol is defined locally or was forced to be local because
4803 of a version file, we just want to emit a RELATIVE reloc.
4804 The entry in the global offset table will already have been
4805 initialized in the relocate_section function. */
4807 && h
->type
== STT_GNU_IFUNC
)
4811 /* Generate R_386_GLOB_DAT. */
4818 if (!h
->pointer_equality_needed
)
4821 /* For non-shared object, we can't use .got.plt, which
4822 contains the real function addres if we need pointer
4823 equality. We load the GOT entry with the PLT entry. */
4824 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4825 bfd_put_32 (output_bfd
,
4826 (plt
->output_section
->vma
4827 + plt
->output_offset
+ h
->plt
.offset
),
4828 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4832 else if (info
->shared
4833 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4835 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4836 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4840 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4842 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4843 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4844 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4847 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4852 Elf_Internal_Rela rel
;
4854 /* This symbol needs a copy reloc. Set it up. */
4856 if (h
->dynindx
== -1
4857 || (h
->root
.type
!= bfd_link_hash_defined
4858 && h
->root
.type
!= bfd_link_hash_defweak
)
4859 || htab
->srelbss
== NULL
)
4862 rel
.r_offset
= (h
->root
.u
.def
.value
4863 + h
->root
.u
.def
.section
->output_section
->vma
4864 + h
->root
.u
.def
.section
->output_offset
);
4865 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4866 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4872 /* Finish up local dynamic symbol handling. We set the contents of
4873 various dynamic sections here. */
4876 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4878 struct elf_link_hash_entry
*h
4879 = (struct elf_link_hash_entry
*) *slot
;
4880 struct bfd_link_info
*info
4881 = (struct bfd_link_info
*) inf
;
4883 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4887 /* Used to decide how to sort relocs in an optimal manner for the
4888 dynamic linker, before writing them out. */
4890 static enum elf_reloc_type_class
4891 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4892 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4893 const Elf_Internal_Rela
*rela
)
4895 switch (ELF32_R_TYPE (rela
->r_info
))
4897 case R_386_RELATIVE
:
4898 return reloc_class_relative
;
4899 case R_386_JUMP_SLOT
:
4900 return reloc_class_plt
;
4902 return reloc_class_copy
;
4904 return reloc_class_normal
;
4908 /* Finish up the dynamic sections. */
4911 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4912 struct bfd_link_info
*info
)
4914 struct elf_i386_link_hash_table
*htab
;
4917 const struct elf_i386_backend_data
*abed
;
4919 htab
= elf_i386_hash_table (info
);
4923 dynobj
= htab
->elf
.dynobj
;
4924 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4925 abed
= get_elf_i386_backend_data (output_bfd
);
4927 if (htab
->elf
.dynamic_sections_created
)
4929 Elf32_External_Dyn
*dyncon
, *dynconend
;
4931 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4934 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4935 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4936 for (; dyncon
< dynconend
; dyncon
++)
4938 Elf_Internal_Dyn dyn
;
4941 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4946 if (abed
->is_vxworks
4947 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4952 s
= htab
->elf
.sgotplt
;
4953 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4957 s
= htab
->elf
.srelplt
;
4958 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4962 s
= htab
->elf
.srelplt
;
4963 dyn
.d_un
.d_val
= s
->size
;
4967 /* My reading of the SVR4 ABI indicates that the
4968 procedure linkage table relocs (DT_JMPREL) should be
4969 included in the overall relocs (DT_REL). This is
4970 what Solaris does. However, UnixWare can not handle
4971 that case. Therefore, we override the DT_RELSZ entry
4972 here to make it not include the JMPREL relocs. */
4973 s
= htab
->elf
.srelplt
;
4976 dyn
.d_un
.d_val
-= s
->size
;
4980 /* We may not be using the standard ELF linker script.
4981 If .rel.plt is the first .rel section, we adjust
4982 DT_REL to not include it. */
4983 s
= htab
->elf
.srelplt
;
4986 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4988 dyn
.d_un
.d_ptr
+= s
->size
;
4992 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4995 /* Fill in the first entry in the procedure linkage table. */
4996 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5000 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5001 abed
->plt
->plt0_entry_size
);
5002 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5003 abed
->plt0_pad_byte
,
5004 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5008 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5009 abed
->plt
->plt0_entry_size
);
5010 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5011 abed
->plt0_pad_byte
,
5012 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5013 bfd_put_32 (output_bfd
,
5014 (htab
->elf
.sgotplt
->output_section
->vma
5015 + htab
->elf
.sgotplt
->output_offset
5017 htab
->elf
.splt
->contents
5018 + abed
->plt
->plt0_got1_offset
);
5019 bfd_put_32 (output_bfd
,
5020 (htab
->elf
.sgotplt
->output_section
->vma
5021 + htab
->elf
.sgotplt
->output_offset
5023 htab
->elf
.splt
->contents
5024 + abed
->plt
->plt0_got2_offset
);
5026 if (abed
->is_vxworks
)
5028 Elf_Internal_Rela rel
;
5030 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5031 On IA32 we use REL relocations so the addend goes in
5032 the PLT directly. */
5033 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5034 + htab
->elf
.splt
->output_offset
5035 + abed
->plt
->plt0_got1_offset
);
5036 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5037 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5038 htab
->srelplt2
->contents
);
5039 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5040 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5041 + htab
->elf
.splt
->output_offset
5042 + abed
->plt
->plt0_got2_offset
);
5043 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5044 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5045 htab
->srelplt2
->contents
+
5046 sizeof (Elf32_External_Rel
));
5050 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5051 really seem like the right value. */
5052 elf_section_data (htab
->elf
.splt
->output_section
)
5053 ->this_hdr
.sh_entsize
= 4;
5055 /* Correct the .rel.plt.unloaded relocations. */
5056 if (abed
->is_vxworks
&& !info
->shared
)
5058 int num_plts
= (htab
->elf
.splt
->size
5059 / abed
->plt
->plt_entry_size
) - 1;
5062 p
= htab
->srelplt2
->contents
;
5064 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5066 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5068 for (; num_plts
; num_plts
--)
5070 Elf_Internal_Rela rel
;
5071 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5072 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5073 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5074 p
+= sizeof (Elf32_External_Rel
);
5076 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5077 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5078 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5079 p
+= sizeof (Elf32_External_Rel
);
5085 if (htab
->elf
.sgotplt
)
5087 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5089 (*_bfd_error_handler
)
5090 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5094 /* Fill in the first three entries in the global offset table. */
5095 if (htab
->elf
.sgotplt
->size
> 0)
5097 bfd_put_32 (output_bfd
,
5099 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5100 htab
->elf
.sgotplt
->contents
);
5101 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5102 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5105 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5108 /* Adjust .eh_frame for .plt section. */
5109 if (htab
->plt_eh_frame
!= NULL
5110 && htab
->plt_eh_frame
->contents
!= NULL
)
5112 if (htab
->elf
.splt
!= NULL
5113 && htab
->elf
.splt
->size
!= 0
5114 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5115 && htab
->elf
.splt
->output_section
!= NULL
5116 && htab
->plt_eh_frame
->output_section
!= NULL
)
5118 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5119 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5120 + htab
->plt_eh_frame
->output_offset
5121 + PLT_FDE_START_OFFSET
;
5122 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5123 htab
->plt_eh_frame
->contents
5124 + PLT_FDE_START_OFFSET
);
5126 if (htab
->plt_eh_frame
->sec_info_type
5127 == SEC_INFO_TYPE_EH_FRAME
)
5129 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5131 htab
->plt_eh_frame
->contents
))
5136 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5137 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5139 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5140 htab_traverse (htab
->loc_hash_table
,
5141 elf_i386_finish_local_dynamic_symbol
,
5147 /* Return address in section PLT for the Ith GOTPLT relocation, for
5148 relocation REL or (bfd_vma) -1 if it should not be included. */
5151 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
, const arelent
*rel
)
5154 const struct elf_i386_backend_data
*bed
;
5157 /* Only match R_386_JUMP_SLOT and R_386_IRELATIVE. */
5158 if (rel
->howto
->type
!= R_386_JUMP_SLOT
5159 && rel
->howto
->type
!= R_386_IRELATIVE
)
5160 return (bfd_vma
) -1;
5163 bed
= get_elf_i386_backend_data (abfd
);
5164 plt_offset
= bed
->plt
->plt_entry_size
;
5166 if (elf_elfheader (abfd
)->e_ident
[EI_OSABI
] != ELFOSABI_GNU
)
5167 return plt
->vma
+ (i
+ 1) * plt_offset
;
5169 while (plt_offset
< plt
->size
)
5171 bfd_vma reloc_offset
;
5172 bfd_byte reloc_offset_raw
[4];
5174 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5176 plt_offset
+ bed
->plt
->plt_reloc_offset
,
5177 sizeof (reloc_offset_raw
)))
5178 return (bfd_vma
) -1;
5180 reloc_offset
= H_GET_32 (abfd
, reloc_offset_raw
);
5181 if (reloc_offset
== i
* sizeof (Elf32_External_Rel
))
5182 return plt
->vma
+ plt_offset
;
5183 plt_offset
+= bed
->plt
->plt_entry_size
;
5189 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5192 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5194 if (h
->plt
.offset
!= (bfd_vma
) -1
5196 && !h
->pointer_equality_needed
)
5199 return _bfd_elf_hash_symbol (h
);
5202 /* Hook called by the linker routine which adds symbols from an object
5206 elf_i386_add_symbol_hook (bfd
* abfd
,
5207 struct bfd_link_info
* info
,
5208 Elf_Internal_Sym
* sym
,
5209 const char ** namep ATTRIBUTE_UNUSED
,
5210 flagword
* flagsp ATTRIBUTE_UNUSED
,
5211 asection
** secp ATTRIBUTE_UNUSED
,
5212 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5214 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5215 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5216 && (abfd
->flags
& DYNAMIC
) == 0
5217 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5218 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5223 #define TARGET_LITTLE_SYM i386_elf32_vec
5224 #define TARGET_LITTLE_NAME "elf32-i386"
5225 #define ELF_ARCH bfd_arch_i386
5226 #define ELF_TARGET_ID I386_ELF_DATA
5227 #define ELF_MACHINE_CODE EM_386
5228 #define ELF_MAXPAGESIZE 0x1000
5230 #define elf_backend_can_gc_sections 1
5231 #define elf_backend_can_refcount 1
5232 #define elf_backend_want_got_plt 1
5233 #define elf_backend_plt_readonly 1
5234 #define elf_backend_want_plt_sym 0
5235 #define elf_backend_got_header_size 12
5236 #define elf_backend_plt_alignment 4
5238 /* Support RELA for objdump of prelink objects. */
5239 #define elf_info_to_howto elf_i386_info_to_howto_rel
5240 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5242 #define bfd_elf32_mkobject elf_i386_mkobject
5244 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5245 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5246 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5247 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5249 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5250 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5251 #define elf_backend_check_relocs elf_i386_check_relocs
5252 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5253 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5254 #define elf_backend_fake_sections elf_i386_fake_sections
5255 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5256 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5257 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5258 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5259 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5260 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5261 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5262 #define elf_backend_relocate_section elf_i386_relocate_section
5263 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5264 #define elf_backend_always_size_sections elf_i386_always_size_sections
5265 #define elf_backend_omit_section_dynsym \
5266 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5267 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5268 #define elf_backend_hash_symbol elf_i386_hash_symbol
5269 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5271 #include "elf32-target.h"
5273 /* FreeBSD support. */
5275 #undef TARGET_LITTLE_SYM
5276 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5277 #undef TARGET_LITTLE_NAME
5278 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5280 #define ELF_OSABI ELFOSABI_FREEBSD
5282 /* The kernel recognizes executables as valid only if they carry a
5283 "FreeBSD" label in the ELF header. So we put this label on all
5284 executables and (for simplicity) also all other object files. */
5287 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5289 _bfd_elf_post_process_headers (abfd
, info
);
5291 #ifdef OLD_FREEBSD_ABI_LABEL
5293 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5294 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5295 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5300 #undef elf_backend_post_process_headers
5301 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5303 #define elf32_bed elf32_i386_fbsd_bed
5305 #undef elf_backend_add_symbol_hook
5307 #include "elf32-target.h"
5311 #undef TARGET_LITTLE_SYM
5312 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5313 #undef TARGET_LITTLE_NAME
5314 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5316 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5317 objects won't be recognized. */
5321 #define elf32_bed elf32_i386_sol2_bed
5323 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5325 #undef elf_backend_static_tls_alignment
5326 #define elf_backend_static_tls_alignment 8
5328 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5330 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5332 #undef elf_backend_want_plt_sym
5333 #define elf_backend_want_plt_sym 1
5335 #include "elf32-target.h"
5337 /* Native Client support. */
5339 #undef TARGET_LITTLE_SYM
5340 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5341 #undef TARGET_LITTLE_NAME
5342 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5344 #define elf32_bed elf32_i386_nacl_bed
5346 #undef ELF_MAXPAGESIZE
5347 #define ELF_MAXPAGESIZE 0x10000
5349 /* Restore defaults. */
5351 #undef elf_backend_want_plt_sym
5352 #define elf_backend_want_plt_sym 0
5353 #undef elf_backend_post_process_headers
5354 #undef elf_backend_static_tls_alignment
5356 /* NaCl uses substantially different PLT entries for the same effects. */
5358 #undef elf_backend_plt_alignment
5359 #define elf_backend_plt_alignment 5
5360 #define NACL_PLT_ENTRY_SIZE 64
5361 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5363 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5365 0xff, 0x35, /* pushl contents of address */
5366 0, 0, 0, 0, /* replaced with address of .got + 4. */
5367 0x8b, 0x0d, /* movl contents of address, %ecx */
5368 0, 0, 0, 0, /* replaced with address of .got + 8. */
5369 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5370 0xff, 0xe1 /* jmp *%ecx */
5373 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5375 0x8b, 0x0d, /* movl contents of address, %ecx */
5376 0, 0, 0, 0, /* replaced with GOT slot address. */
5377 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5378 0xff, 0xe1, /* jmp *%ecx */
5380 /* Pad to the next 32-byte boundary with nop instructions. */
5382 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5383 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5385 /* Lazy GOT entries point here (32-byte aligned). */
5386 0x68, /* pushl immediate */
5387 0, 0, 0, 0, /* replaced with reloc offset. */
5388 0xe9, /* jmp relative */
5389 0, 0, 0, 0, /* replaced with offset to .plt. */
5391 /* Pad to the next 32-byte boundary with nop instructions. */
5392 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5393 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5397 static const bfd_byte
5398 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5400 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5401 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5402 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5403 0xff, 0xe1, /* jmp *%ecx */
5405 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5406 so pad to that size with nop instructions. */
5407 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5410 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5412 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5413 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5414 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5415 0xff, 0xe1, /* jmp *%ecx */
5417 /* Pad to the next 32-byte boundary with nop instructions. */
5419 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5420 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5422 /* Lazy GOT entries point here (32-byte aligned). */
5423 0x68, /* pushl immediate */
5424 0, 0, 0, 0, /* replaced with offset into relocation table. */
5425 0xe9, /* jmp relative */
5426 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5428 /* Pad to the next 32-byte boundary with nop instructions. */
5429 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5430 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5434 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5436 #if (PLT_CIE_LENGTH != 20 \
5437 || PLT_FDE_LENGTH != 36 \
5438 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5439 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5440 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5442 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5443 0, 0, 0, 0, /* CIE ID */
5444 1, /* CIE version */
5445 'z', 'R', 0, /* Augmentation string */
5446 1, /* Code alignment factor */
5447 0x7c, /* Data alignment factor: -4 */
5448 8, /* Return address column */
5449 1, /* Augmentation size */
5450 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5451 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5452 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5453 DW_CFA_nop
, DW_CFA_nop
,
5455 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5456 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5457 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5458 0, 0, 0, 0, /* .plt size goes here */
5459 0, /* Augmentation size */
5460 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5461 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5462 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5463 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5464 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5465 13, /* Block length */
5466 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5467 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5468 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5469 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5470 DW_CFA_nop
, DW_CFA_nop
5473 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5475 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5476 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5477 2, /* plt0_got1_offset */
5478 8, /* plt0_got2_offset */
5479 elf_i386_nacl_plt_entry
, /* plt_entry */
5480 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5481 2, /* plt_got_offset */
5482 33, /* plt_reloc_offset */
5483 38, /* plt_plt_offset */
5484 32, /* plt_lazy_offset */
5485 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5486 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5487 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5488 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5491 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5493 &elf_i386_nacl_plt
, /* plt */
5494 0x90, /* plt0_pad_byte: nop insn */
5499 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5501 /* Set the right machine number for a NaCl i386 ELF32 file. */
5502 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5506 #undef elf_backend_arch_data
5507 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5509 #undef elf_backend_object_p
5510 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5511 #undef elf_backend_modify_segment_map
5512 #define elf_backend_modify_segment_map nacl_modify_segment_map
5513 #undef elf_backend_modify_program_headers
5514 #define elf_backend_modify_program_headers nacl_modify_program_headers
5515 #undef elf_backend_final_write_processing
5516 #define elf_backend_final_write_processing nacl_final_write_processing
5518 #include "elf32-target.h"
5520 /* Restore defaults. */
5521 #undef elf_backend_object_p
5522 #undef elf_backend_modify_segment_map
5523 #undef elf_backend_modify_program_headers
5524 #undef elf_backend_final_write_processing
5526 /* VxWorks support. */
5528 #undef TARGET_LITTLE_SYM
5529 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5530 #undef TARGET_LITTLE_NAME
5531 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5533 #undef elf_backend_plt_alignment
5534 #define elf_backend_plt_alignment 4
5536 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5538 &elf_i386_plt
, /* plt */
5539 0x90, /* plt0_pad_byte */
5543 #undef elf_backend_arch_data
5544 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5546 #undef elf_backend_relocs_compatible
5547 #undef elf_backend_add_symbol_hook
5548 #define elf_backend_add_symbol_hook \
5549 elf_vxworks_add_symbol_hook
5550 #undef elf_backend_link_output_symbol_hook
5551 #define elf_backend_link_output_symbol_hook \
5552 elf_vxworks_link_output_symbol_hook
5553 #undef elf_backend_emit_relocs
5554 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5555 #undef elf_backend_final_write_processing
5556 #define elf_backend_final_write_processing \
5557 elf_vxworks_final_write_processing
5558 #undef elf_backend_static_tls_alignment
5560 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5562 #undef elf_backend_want_plt_sym
5563 #define elf_backend_want_plt_sym 1
5566 #define elf32_bed elf32_i386_vxworks_bed
5568 #include "elf32-target.h"