1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 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, 3, 0, FALSE
, 0, complain_overflow_dont
,
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 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table
[indx
].type
!= r_type
)
385 return &elf_howto_table
[indx
];
389 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
391 Elf_Internal_Rela
*dst
)
393 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
394 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
406 if (name
[0] == '.' && name
[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd
, name
);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
420 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
422 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
428 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
431 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
435 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
439 switch (note
->descsz
)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
449 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
461 size
, note
->descpos
+ offset
);
465 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
467 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
469 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
474 elf_tdata (abfd
)->core
->program
475 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
476 elf_tdata (abfd
)->core
->command
477 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
481 switch (note
->descsz
)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd
)->core
->pid
488 = bfd_get_32 (abfd
, note
->descdata
+ 12);
489 elf_tdata (abfd
)->core
->program
490 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
491 elf_tdata (abfd
)->core
->command
492 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command
= elf_tdata (abfd
)->core
->command
;
501 int n
= strlen (command
);
503 if (0 < n
&& command
[n
- 1] == ' ')
504 command
[n
- 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry
[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* Entries in the GOT procedure linkage table look like this. */
587 static const bfd_byte elf_i386_got_plt_entry
[8] =
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
594 /* Entries in the PIC GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* .eh_frame covering the .plt section. */
605 static const bfd_byte elf_i386_eh_frame_plt
[] =
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
620 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop
, DW_CFA_nop
,
624 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
638 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
639 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
642 struct elf_i386_plt_layout
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte
*plt0_entry
;
646 unsigned int plt0_entry_size
;
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset
;
650 unsigned int plt0_got2_offset
;
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte
*plt_entry
;
654 unsigned int plt_entry_size
;
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset
;
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte
*pic_plt0_entry
;
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte
*pic_plt_entry
;
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte
*eh_frame_plt
;
672 unsigned int eh_frame_plt_size
;
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt
=
681 elf_i386_plt0_entry
, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry
, /* plt_entry */
686 PLT_ENTRY_SIZE
, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry
, /* pic_plt_entry */
693 elf_i386_eh_frame_plt
, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
704 /* Architecture-specific backend data for i386. */
706 struct elf_i386_backend_data
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout
*plt
;
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte
;
714 /* True if the target system is VxWorks. */
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed
=
725 &elf_i386_plt
, /* plt */
726 0, /* plt0_pad_byte */
730 #define elf_backend_arch_data &elf_i386_arch_bed
732 /* i386 ELF linker hash entry. */
734 struct elf_i386_link_hash_entry
736 struct elf_link_hash_entry elf
;
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs
*dyn_relocs
;
741 #define GOT_UNKNOWN 0
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type
;
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref
: 1;
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got
;
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
771 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
773 struct elf_i386_obj_tdata
775 struct elf_obj_tdata root
;
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type
;
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma
*local_tlsdesc_gotent
;
784 #define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
787 #define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
790 #define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
793 #define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
796 && elf_object_id (bfd) == I386_ELF_DATA)
799 elf_i386_mkobject (bfd
*abfd
)
801 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
805 /* i386 ELF linker hash table. */
807 struct elf_i386_link_hash_table
809 struct elf_link_hash_table elf
;
811 /* Short-cuts to get to dynamic linker sections. */
814 asection
*plt_eh_frame
;
819 bfd_signed_vma refcount
;
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size
;
827 /* Small local sym cache. */
828 struct sym_cache sym_cache
;
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry
*tls_module_base
;
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table
;
835 void * loc_hash_memory
;
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index
;
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index
;
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index
;
850 /* Get the i386 ELF linker hash table from a link_info structure. */
852 #define elf_i386_hash_table(p) \
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
856 #define elf_i386_compute_jump_table_size(htab) \
857 ((htab)->elf.srelplt->reloc_count * 4)
859 /* Create an entry in an i386 ELF linker hash table. */
861 static struct bfd_hash_entry
*
862 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
863 struct bfd_hash_table
*table
,
866 /* Allocate the structure if it has not already been allocated by a
870 entry
= (struct bfd_hash_entry
*)
871 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
876 /* Call the allocation method of the superclass. */
877 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
880 struct elf_i386_link_hash_entry
*eh
;
882 eh
= (struct elf_i386_link_hash_entry
*) entry
;
883 eh
->dyn_relocs
= NULL
;
884 eh
->tls_type
= GOT_UNKNOWN
;
886 eh
->plt_got
.offset
= (bfd_vma
) -1;
887 eh
->tlsdesc_got
= (bfd_vma
) -1;
893 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
899 elf_i386_local_htab_hash (const void *ptr
)
901 struct elf_link_hash_entry
*h
902 = (struct elf_link_hash_entry
*) ptr
;
903 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
906 /* Compare local hash entries. */
909 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
911 struct elf_link_hash_entry
*h1
912 = (struct elf_link_hash_entry
*) ptr1
;
913 struct elf_link_hash_entry
*h2
914 = (struct elf_link_hash_entry
*) ptr2
;
916 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
919 /* Find and/or create a hash entry for local symbol. */
921 static struct elf_link_hash_entry
*
922 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
923 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
926 struct elf_i386_link_hash_entry e
, *ret
;
927 asection
*sec
= abfd
->sections
;
928 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
929 ELF32_R_SYM (rel
->r_info
));
932 e
.elf
.indx
= sec
->id
;
933 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
934 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
935 create
? INSERT
: NO_INSERT
);
942 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
946 ret
= (struct elf_i386_link_hash_entry
*)
947 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
948 sizeof (struct elf_i386_link_hash_entry
));
951 memset (ret
, 0, sizeof (*ret
));
952 ret
->elf
.indx
= sec
->id
;
953 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
954 ret
->elf
.dynindx
= -1;
955 ret
->plt_got
.offset
= (bfd_vma
) -1;
961 /* Destroy an i386 ELF linker hash table. */
964 elf_i386_link_hash_table_free (bfd
*obfd
)
966 struct elf_i386_link_hash_table
*htab
967 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
969 if (htab
->loc_hash_table
)
970 htab_delete (htab
->loc_hash_table
);
971 if (htab
->loc_hash_memory
)
972 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
973 _bfd_elf_link_hash_table_free (obfd
);
976 /* Create an i386 ELF linker hash table. */
978 static struct bfd_link_hash_table
*
979 elf_i386_link_hash_table_create (bfd
*abfd
)
981 struct elf_i386_link_hash_table
*ret
;
982 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
984 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
988 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
989 elf_i386_link_hash_newfunc
,
990 sizeof (struct elf_i386_link_hash_entry
),
997 ret
->loc_hash_table
= htab_try_create (1024,
998 elf_i386_local_htab_hash
,
999 elf_i386_local_htab_eq
,
1001 ret
->loc_hash_memory
= objalloc_create ();
1002 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1004 elf_i386_link_hash_table_free (abfd
);
1007 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1009 return &ret
->elf
.root
;
1012 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1017 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1019 struct elf_i386_link_hash_table
*htab
;
1021 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1024 htab
= elf_i386_hash_table (info
);
1028 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1032 if (info
->executable
)
1034 /* Always allow copy relocs for building executables. */
1035 asection
*s
= bfd_get_linker_section (dynobj
, ".rel.bss");
1038 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1039 s
= bfd_make_section_anyway_with_flags (dynobj
,
1041 (bed
->dynamic_sec_flags
1044 || ! bfd_set_section_alignment (dynobj
, s
,
1045 bed
->s
->log_file_align
))
1051 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1052 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1056 if (!info
->no_ld_generated_unwind_info
1057 && htab
->plt_eh_frame
== NULL
1058 && htab
->elf
.splt
!= NULL
)
1060 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1061 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED
);
1064 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1065 if (htab
->plt_eh_frame
== NULL
1066 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1073 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1076 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1077 struct elf_link_hash_entry
*dir
,
1078 struct elf_link_hash_entry
*ind
)
1080 struct elf_i386_link_hash_entry
*edir
, *eind
;
1082 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1083 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1085 if (eind
->dyn_relocs
!= NULL
)
1087 if (edir
->dyn_relocs
!= NULL
)
1089 struct elf_dyn_relocs
**pp
;
1090 struct elf_dyn_relocs
*p
;
1092 /* Add reloc counts against the indirect sym to the direct sym
1093 list. Merge any entries against the same section. */
1094 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1096 struct elf_dyn_relocs
*q
;
1098 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1099 if (q
->sec
== p
->sec
)
1101 q
->pc_count
+= p
->pc_count
;
1102 q
->count
+= p
->count
;
1109 *pp
= edir
->dyn_relocs
;
1112 edir
->dyn_relocs
= eind
->dyn_relocs
;
1113 eind
->dyn_relocs
= NULL
;
1116 if (ind
->root
.type
== bfd_link_hash_indirect
1117 && dir
->got
.refcount
<= 0)
1119 edir
->tls_type
= eind
->tls_type
;
1120 eind
->tls_type
= GOT_UNKNOWN
;
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind
->root
.type
!= bfd_link_hash_indirect
1129 && dir
->dynamic_adjusted
)
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1135 dir
->ref_regular
|= ind
->ref_regular
;
1136 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1137 dir
->needs_plt
|= ind
->needs_plt
;
1138 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1141 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1144 /* Return TRUE if the TLS access code sequence support transition
1148 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1150 Elf_Internal_Shdr
*symtab_hdr
,
1151 struct elf_link_hash_entry
**sym_hashes
,
1152 unsigned int r_type
,
1153 const Elf_Internal_Rela
*rel
,
1154 const Elf_Internal_Rela
*relend
)
1156 unsigned int val
, type
;
1157 unsigned long r_symndx
;
1158 struct elf_link_hash_entry
*h
;
1161 /* Get the section contents. */
1162 if (contents
== NULL
)
1164 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1165 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1177 offset
= rel
->r_offset
;
1182 if (offset
< 2 || (rel
+ 1) >= relend
)
1185 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1186 if (r_type
== R_386_TLS_GD
)
1188 /* Check transition from GD access model. Only
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset
+ 10) > sec
->size
||
1193 (type
!= 0x8d && type
!= 0x04))
1196 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1203 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1206 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1215 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1227 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1228 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1232 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1235 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1236 if (r_symndx
< symtab_hdr
->sh_info
)
1239 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
1243 && h
->root
.root
.string
!= NULL
1244 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1245 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1246 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1256 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1269 return ((type
== 0x8b || type
== 0x03)
1270 && (val
& 0xc7) == 0x05);
1272 case R_386_TLS_GOTIE
:
1273 case R_386_TLS_IE_32
:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1280 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1283 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1284 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1287 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1288 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1290 case R_386_TLS_GOTDESC
:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1298 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1301 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1304 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1305 return (val
& 0xc7) == 0x83;
1307 case R_386_TLS_DESC_CALL
:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1311 if (offset
+ 2 <= sec
->size
)
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
1314 static const unsigned char call
[] = { 0xff, 0x10 };
1315 return memcmp (contents
+ offset
, call
, 2) == 0;
1325 /* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1329 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1330 asection
*sec
, bfd_byte
*contents
,
1331 Elf_Internal_Shdr
*symtab_hdr
,
1332 struct elf_link_hash_entry
**sym_hashes
,
1333 unsigned int *r_type
, int tls_type
,
1334 const Elf_Internal_Rela
*rel
,
1335 const Elf_Internal_Rela
*relend
,
1336 struct elf_link_hash_entry
*h
,
1337 unsigned long r_symndx
)
1339 unsigned int from_type
= *r_type
;
1340 unsigned int to_type
= from_type
;
1341 bfd_boolean check
= TRUE
;
1343 /* Skip TLS transition for functions. */
1345 && (h
->type
== STT_FUNC
1346 || h
->type
== STT_GNU_IFUNC
))
1352 case R_386_TLS_GOTDESC
:
1353 case R_386_TLS_DESC_CALL
:
1354 case R_386_TLS_IE_32
:
1356 case R_386_TLS_GOTIE
:
1357 if (info
->executable
)
1360 to_type
= R_386_TLS_LE_32
;
1361 else if (from_type
!= R_386_TLS_IE
1362 && from_type
!= R_386_TLS_GOTIE
)
1363 to_type
= R_386_TLS_IE_32
;
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1369 if (contents
!= NULL
)
1371 unsigned int new_to_type
= to_type
;
1373 if (info
->executable
1376 && (tls_type
& GOT_TLS_IE
))
1377 new_to_type
= R_386_TLS_LE_32
;
1379 if (to_type
== R_386_TLS_GD
1380 || to_type
== R_386_TLS_GOTDESC
1381 || to_type
== R_386_TLS_DESC_CALL
)
1383 if (tls_type
== GOT_TLS_IE_POS
)
1384 new_to_type
= R_386_TLS_GOTIE
;
1385 else if (tls_type
& GOT_TLS_IE
)
1386 new_to_type
= R_386_TLS_IE_32
;
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1393 to_type
= new_to_type
;
1399 if (info
->executable
)
1400 to_type
= R_386_TLS_LE_32
;
1407 /* Return TRUE if there is no transition. */
1408 if (from_type
== to_type
)
1411 /* Check if the transition can be performed. */
1413 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1414 symtab_hdr
, sym_hashes
,
1415 from_type
, rel
, relend
))
1417 reloc_howto_type
*from
, *to
;
1420 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1421 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1424 name
= h
->root
.root
.string
;
1427 struct elf_i386_link_hash_table
*htab
;
1429 htab
= elf_i386_hash_table (info
);
1434 Elf_Internal_Sym
*isym
;
1436 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1438 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1442 (*_bfd_error_handler
)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
1445 abfd
, sec
, from
->name
, to
->name
, name
,
1446 (unsigned long) rel
->r_offset
);
1447 bfd_set_error (bfd_error_bad_value
);
1455 /* Rename some of the generic section flags to better document how they
1457 #define need_convert_mov_to_lea sec_flg0
1459 /* Look through the relocs for a section during the first phase, and
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
1464 elf_i386_check_relocs (bfd
*abfd
,
1465 struct bfd_link_info
*info
,
1467 const Elf_Internal_Rela
*relocs
)
1469 struct elf_i386_link_hash_table
*htab
;
1470 Elf_Internal_Shdr
*symtab_hdr
;
1471 struct elf_link_hash_entry
**sym_hashes
;
1472 const Elf_Internal_Rela
*rel
;
1473 const Elf_Internal_Rela
*rel_end
;
1475 bfd_boolean use_plt_got
;
1477 if (info
->relocatable
)
1480 BFD_ASSERT (is_i386_elf (abfd
));
1482 htab
= elf_i386_hash_table (info
);
1486 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd
)
1488 == &elf_i386_arch_bed
));
1490 symtab_hdr
= &elf_symtab_hdr (abfd
);
1491 sym_hashes
= elf_sym_hashes (abfd
);
1495 rel_end
= relocs
+ sec
->reloc_count
;
1496 for (rel
= relocs
; rel
< rel_end
; rel
++)
1498 unsigned int r_type
;
1499 unsigned long r_symndx
;
1500 struct elf_link_hash_entry
*h
;
1501 struct elf_i386_link_hash_entry
*eh
;
1502 Elf_Internal_Sym
*isym
;
1504 bfd_boolean size_reloc
;
1506 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1507 r_type
= ELF32_R_TYPE (rel
->r_info
);
1509 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1511 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1517 if (r_symndx
< symtab_hdr
->sh_info
)
1519 /* A local symbol. */
1520 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
1526 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1528 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h
->type
= STT_GNU_IFUNC
;
1536 h
->forced_local
= 1;
1537 h
->root
.type
= bfd_link_hash_defined
;
1545 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1546 while (h
->root
.type
== bfd_link_hash_indirect
1547 || h
->root
.type
== bfd_link_hash_warning
)
1548 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1551 eh
= (struct elf_i386_link_hash_entry
*) h
;
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1569 if (htab
->elf
.dynobj
== NULL
)
1570 htab
->elf
.dynobj
= abfd
;
1571 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1576 /* It is referenced by a non-shared object. */
1578 h
->root
.non_ir_ref
= 1;
1581 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1582 symtab_hdr
, sym_hashes
,
1583 &r_type
, GOT_UNKNOWN
,
1584 rel
, rel_end
, h
, r_symndx
))
1590 htab
->tls_ldm_got
.refcount
+= 1;
1594 /* This symbol requires a procedure linkage table entry. We
1595 actually build the entry in adjust_dynamic_symbol,
1596 because this might be a case of linking PIC code which is
1597 never referenced by a dynamic object, in which case we
1598 don't need to generate a procedure linkage table entry
1601 /* If this is a local symbol, we resolve it directly without
1602 creating a procedure linkage table entry. */
1607 h
->plt
.refcount
+= 1;
1614 case R_386_TLS_IE_32
:
1616 case R_386_TLS_GOTIE
:
1617 if (!info
->executable
)
1618 info
->flags
|= DF_STATIC_TLS
;
1623 case R_386_TLS_GOTDESC
:
1624 case R_386_TLS_DESC_CALL
:
1625 /* This symbol requires a global offset table entry. */
1627 int tls_type
, old_tls_type
;
1632 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1633 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1634 case R_386_TLS_GOTDESC
:
1635 case R_386_TLS_DESC_CALL
:
1636 tls_type
= GOT_TLS_GDESC
; break;
1637 case R_386_TLS_IE_32
:
1638 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1639 tls_type
= GOT_TLS_IE_NEG
;
1641 /* If this is a GD->IE transition, we may use either of
1642 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1643 tls_type
= GOT_TLS_IE
;
1646 case R_386_TLS_GOTIE
:
1647 tls_type
= GOT_TLS_IE_POS
; break;
1652 h
->got
.refcount
+= 1;
1653 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1657 bfd_signed_vma
*local_got_refcounts
;
1659 /* This is a global offset table entry for a local symbol. */
1660 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1661 if (local_got_refcounts
== NULL
)
1665 size
= symtab_hdr
->sh_info
;
1666 size
*= (sizeof (bfd_signed_vma
)
1667 + sizeof (bfd_vma
) + sizeof(char));
1668 local_got_refcounts
= (bfd_signed_vma
*)
1669 bfd_zalloc (abfd
, size
);
1670 if (local_got_refcounts
== NULL
)
1672 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1673 elf_i386_local_tlsdesc_gotent (abfd
)
1674 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1675 elf_i386_local_got_tls_type (abfd
)
1676 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1678 local_got_refcounts
[r_symndx
] += 1;
1679 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1682 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1683 tls_type
|= old_tls_type
;
1684 /* If a TLS symbol is accessed using IE at least once,
1685 there is no point to use dynamic model for it. */
1686 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1687 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1688 || (tls_type
& GOT_TLS_IE
) == 0))
1690 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1691 tls_type
= old_tls_type
;
1692 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1693 && GOT_TLS_GD_ANY_P (tls_type
))
1694 tls_type
|= old_tls_type
;
1698 name
= h
->root
.root
.string
;
1700 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1702 (*_bfd_error_handler
)
1703 (_("%B: `%s' accessed both as normal and "
1704 "thread local symbol"),
1706 bfd_set_error (bfd_error_bad_value
);
1711 if (old_tls_type
!= tls_type
)
1714 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1716 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1724 if (htab
->elf
.sgot
== NULL
)
1726 if (htab
->elf
.dynobj
== NULL
)
1727 htab
->elf
.dynobj
= abfd
;
1728 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1731 if (r_type
!= R_386_TLS_IE
)
1735 case R_386_TLS_LE_32
:
1737 if (info
->executable
)
1739 info
->flags
|= DF_STATIC_TLS
;
1744 if (h
!= NULL
&& info
->executable
)
1746 /* If this reloc is in a read-only section, we might
1747 need a copy reloc. We can't check reliably at this
1748 stage whether the section is read-only, as input
1749 sections have not yet been mapped to output sections.
1750 Tentatively set the flag for now, and correct in
1751 adjust_dynamic_symbol. */
1754 /* We may need a .plt entry if the function this reloc
1755 refers to is in a shared lib. */
1756 h
->plt
.refcount
+= 1;
1757 if (r_type
!= R_386_PC32
)
1758 h
->pointer_equality_needed
= 1;
1763 /* If we are creating a shared library, and this is a reloc
1764 against a global symbol, or a non PC relative reloc
1765 against a local symbol, then we need to copy the reloc
1766 into the shared library. However, if we are linking with
1767 -Bsymbolic, we do not need to copy a reloc against a
1768 global symbol which is defined in an object we are
1769 including in the link (i.e., DEF_REGULAR is set). At
1770 this point we have not seen all the input files, so it is
1771 possible that DEF_REGULAR is not set now but will be set
1772 later (it is never cleared). In case of a weak definition,
1773 DEF_REGULAR may be cleared later by a strong definition in
1774 a shared library. We account for that possibility below by
1775 storing information in the relocs_copied field of the hash
1776 table entry. A similar situation occurs when creating
1777 shared libraries and symbol visibility changes render the
1780 If on the other hand, we are creating an executable, we
1781 may need to keep relocations for symbols satisfied by a
1782 dynamic library if we manage to avoid copy relocs for the
1785 && (sec
->flags
& SEC_ALLOC
) != 0
1786 && (r_type
!= R_386_PC32
1788 && (! SYMBOLIC_BIND (info
, h
)
1789 || h
->root
.type
== bfd_link_hash_defweak
1790 || !h
->def_regular
))))
1791 || (ELIMINATE_COPY_RELOCS
1793 && (sec
->flags
& SEC_ALLOC
) != 0
1795 && (h
->root
.type
== bfd_link_hash_defweak
1796 || !h
->def_regular
)))
1798 struct elf_dyn_relocs
*p
;
1799 struct elf_dyn_relocs
**head
;
1801 /* We must copy these reloc types into the output file.
1802 Create a reloc section in dynobj and make room for
1806 if (htab
->elf
.dynobj
== NULL
)
1807 htab
->elf
.dynobj
= abfd
;
1809 sreloc
= _bfd_elf_make_dynamic_reloc_section
1810 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1816 /* If this is a global symbol, we count the number of
1817 relocations we need for this symbol. */
1820 head
= &eh
->dyn_relocs
;
1824 /* Track dynamic relocs needed for local syms too.
1825 We really need local syms available to do this
1830 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1835 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1839 vpp
= &elf_section_data (s
)->local_dynrel
;
1840 head
= (struct elf_dyn_relocs
**)vpp
;
1844 if (p
== NULL
|| p
->sec
!= sec
)
1846 bfd_size_type amt
= sizeof *p
;
1847 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1859 /* Count size relocation as PC-relative relocation. */
1860 if (r_type
== R_386_PC32
|| size_reloc
)
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT
:
1868 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY
:
1875 BFD_ASSERT (h
!= NULL
);
1877 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1887 && h
->plt
.refcount
> 0
1888 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
1889 || h
->got
.refcount
> 0)
1890 && htab
->plt_got
== NULL
)
1892 /* Create the GOT procedure linkage table. */
1893 unsigned int plt_got_align
;
1894 const struct elf_backend_data
*bed
;
1896 bed
= get_elf_backend_data (info
->output_bfd
);
1897 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1898 && (sizeof (elf_i386_got_plt_entry
)
1899 == sizeof (elf_i386_pic_got_plt_entry
)));
1902 if (htab
->elf
.dynobj
== NULL
)
1903 htab
->elf
.dynobj
= abfd
;
1905 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1907 (bed
->dynamic_sec_flags
1912 if (htab
->plt_got
== NULL
1913 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1919 if (r_type
== R_386_GOT32
1920 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1921 sec
->need_convert_mov_to_lea
= 1;
1927 /* Return the section that should be marked against GC for a given
1931 elf_i386_gc_mark_hook (asection
*sec
,
1932 struct bfd_link_info
*info
,
1933 Elf_Internal_Rela
*rel
,
1934 struct elf_link_hash_entry
*h
,
1935 Elf_Internal_Sym
*sym
)
1938 switch (ELF32_R_TYPE (rel
->r_info
))
1940 case R_386_GNU_VTINHERIT
:
1941 case R_386_GNU_VTENTRY
:
1945 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1948 /* Update the got entry reference counts for the section being removed. */
1951 elf_i386_gc_sweep_hook (bfd
*abfd
,
1952 struct bfd_link_info
*info
,
1954 const Elf_Internal_Rela
*relocs
)
1956 struct elf_i386_link_hash_table
*htab
;
1957 Elf_Internal_Shdr
*symtab_hdr
;
1958 struct elf_link_hash_entry
**sym_hashes
;
1959 bfd_signed_vma
*local_got_refcounts
;
1960 const Elf_Internal_Rela
*rel
, *relend
;
1962 if (info
->relocatable
)
1965 htab
= elf_i386_hash_table (info
);
1969 elf_section_data (sec
)->local_dynrel
= NULL
;
1971 symtab_hdr
= &elf_symtab_hdr (abfd
);
1972 sym_hashes
= elf_sym_hashes (abfd
);
1973 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1975 relend
= relocs
+ sec
->reloc_count
;
1976 for (rel
= relocs
; rel
< relend
; rel
++)
1978 unsigned long r_symndx
;
1979 unsigned int r_type
;
1980 struct elf_link_hash_entry
*h
= NULL
;
1982 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1983 if (r_symndx
>= symtab_hdr
->sh_info
)
1985 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1986 while (h
->root
.type
== bfd_link_hash_indirect
1987 || h
->root
.type
== bfd_link_hash_warning
)
1988 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1992 /* A local symbol. */
1993 Elf_Internal_Sym
*isym
;
1995 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1998 /* Check relocation against local STT_GNU_IFUNC symbol. */
2000 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2002 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2010 struct elf_i386_link_hash_entry
*eh
;
2011 struct elf_dyn_relocs
**pp
;
2012 struct elf_dyn_relocs
*p
;
2014 eh
= (struct elf_i386_link_hash_entry
*) h
;
2015 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2018 /* Everything must go for SEC. */
2024 r_type
= ELF32_R_TYPE (rel
->r_info
);
2025 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
2026 symtab_hdr
, sym_hashes
,
2027 &r_type
, GOT_UNKNOWN
,
2028 rel
, relend
, h
, r_symndx
))
2034 if (htab
->tls_ldm_got
.refcount
> 0)
2035 htab
->tls_ldm_got
.refcount
-= 1;
2039 case R_386_TLS_GOTDESC
:
2040 case R_386_TLS_DESC_CALL
:
2041 case R_386_TLS_IE_32
:
2043 case R_386_TLS_GOTIE
:
2047 if (h
->got
.refcount
> 0)
2048 h
->got
.refcount
-= 1;
2049 if (h
->type
== STT_GNU_IFUNC
)
2051 if (h
->plt
.refcount
> 0)
2052 h
->plt
.refcount
-= 1;
2055 else if (local_got_refcounts
!= NULL
)
2057 if (local_got_refcounts
[r_symndx
] > 0)
2058 local_got_refcounts
[r_symndx
] -= 1;
2066 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2073 if (h
->plt
.refcount
> 0)
2074 h
->plt
.refcount
-= 1;
2079 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2081 if (h
->got
.refcount
> 0)
2082 h
->got
.refcount
-= 1;
2083 if (h
->plt
.refcount
> 0)
2084 h
->plt
.refcount
-= 1;
2096 /* Adjust a symbol defined by a dynamic object and referenced by a
2097 regular object. The current definition is in some section of the
2098 dynamic object, but we're not including those sections. We have to
2099 change the definition to something the rest of the link can
2103 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2104 struct elf_link_hash_entry
*h
)
2106 struct elf_i386_link_hash_table
*htab
;
2108 struct elf_i386_link_hash_entry
*eh
;
2109 struct elf_dyn_relocs
*p
;
2111 /* STT_GNU_IFUNC symbol must go through PLT. */
2112 if (h
->type
== STT_GNU_IFUNC
)
2114 /* All local STT_GNU_IFUNC references must be treate as local
2115 calls via local PLT. */
2117 && SYMBOL_CALLS_LOCAL (info
, h
))
2119 bfd_size_type pc_count
= 0, count
= 0;
2120 struct elf_dyn_relocs
**pp
;
2122 eh
= (struct elf_i386_link_hash_entry
*) h
;
2123 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2125 pc_count
+= p
->pc_count
;
2126 p
->count
-= p
->pc_count
;
2135 if (pc_count
|| count
)
2139 if (h
->plt
.refcount
<= 0)
2140 h
->plt
.refcount
= 1;
2142 h
->plt
.refcount
+= 1;
2146 if (h
->plt
.refcount
<= 0)
2148 h
->plt
.offset
= (bfd_vma
) -1;
2154 /* If this is a function, put it in the procedure linkage table. We
2155 will fill in the contents of the procedure linkage table later,
2156 when we know the address of the .got section. */
2157 if (h
->type
== STT_FUNC
2160 if (h
->plt
.refcount
<= 0
2161 || SYMBOL_CALLS_LOCAL (info
, h
)
2162 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2163 && h
->root
.type
== bfd_link_hash_undefweak
))
2165 /* This case can occur if we saw a PLT32 reloc in an input
2166 file, but the symbol was never referred to by a dynamic
2167 object, or if all references were garbage collected. In
2168 such a case, we don't actually need to build a procedure
2169 linkage table, and we can just do a PC32 reloc instead. */
2170 h
->plt
.offset
= (bfd_vma
) -1;
2177 /* It's possible that we incorrectly decided a .plt reloc was
2178 needed for an R_386_PC32 reloc to a non-function sym in
2179 check_relocs. We can't decide accurately between function and
2180 non-function syms in check-relocs; Objects loaded later in
2181 the link may change h->type. So fix it now. */
2182 h
->plt
.offset
= (bfd_vma
) -1;
2184 /* If this is a weak symbol, and there is a real definition, the
2185 processor independent code will have arranged for us to see the
2186 real definition first, and we can just use the same value. */
2187 if (h
->u
.weakdef
!= NULL
)
2189 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2190 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2191 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2192 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2193 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2194 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2198 /* This is a reference to a symbol defined by a dynamic object which
2199 is not a function. */
2201 /* If we are creating a shared library, we must presume that the
2202 only references to the symbol are via the global offset table.
2203 For such cases we need not do anything here; the relocations will
2204 be handled correctly by relocate_section. */
2205 if (!info
->executable
)
2208 /* If there are no references to this symbol that do not use the
2209 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2211 eh
= (struct elf_i386_link_hash_entry
*) h
;
2212 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2215 /* If -z nocopyreloc was given, we won't generate them either. */
2216 if (info
->nocopyreloc
)
2222 htab
= elf_i386_hash_table (info
);
2226 /* If there aren't any dynamic relocs in read-only sections nor
2227 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2228 avoid the copy reloc. This doesn't work on VxWorks, where we can
2229 not have dynamic relocations (other than copy and jump slot
2230 relocations) in an executable. */
2231 if (ELIMINATE_COPY_RELOCS
2233 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2235 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2237 s
= p
->sec
->output_section
;
2238 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2249 /* We must allocate the symbol in our .dynbss section, which will
2250 become part of the .bss section of the executable. There will be
2251 an entry for this symbol in the .dynsym section. The dynamic
2252 object will contain position independent code, so all references
2253 from the dynamic object to this symbol will go through the global
2254 offset table. The dynamic linker will use the .dynsym entry to
2255 determine the address it must put in the global offset table, so
2256 both the dynamic object and the regular object will refer to the
2257 same memory location for the variable. */
2259 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2260 copy the initial value out of the dynamic object and into the
2261 runtime process image. */
2262 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2264 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2270 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2273 /* Allocate space in .plt, .got and associated reloc sections for
2277 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2279 struct bfd_link_info
*info
;
2280 struct elf_i386_link_hash_table
*htab
;
2281 struct elf_i386_link_hash_entry
*eh
;
2282 struct elf_dyn_relocs
*p
;
2283 unsigned plt_entry_size
;
2285 if (h
->root
.type
== bfd_link_hash_indirect
)
2288 eh
= (struct elf_i386_link_hash_entry
*) h
;
2290 info
= (struct bfd_link_info
*) inf
;
2291 htab
= elf_i386_hash_table (info
);
2295 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2297 /* We can't use the GOT PLT if pointer equality is needed since
2298 finish_dynamic_symbol won't clear symbol value and the dynamic
2299 linker won't update the GOT slot. We will get into an infinite
2300 loop at run-time. */
2301 if (htab
->plt_got
!= NULL
2302 && h
->type
!= STT_GNU_IFUNC
2303 && !h
->pointer_equality_needed
2304 && h
->plt
.refcount
> 0
2305 && h
->got
.refcount
> 0)
2307 /* Don't use the regular PLT if there are both GOT and GOTPLT
2309 h
->plt
.offset
= (bfd_vma
) -1;
2311 /* Use the GOT PLT. */
2312 eh
->plt_got
.refcount
= 1;
2315 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2316 here if it is defined and referenced in a non-shared object. */
2317 if (h
->type
== STT_GNU_IFUNC
2319 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2322 else if (htab
->elf
.dynamic_sections_created
2323 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2325 bfd_boolean use_plt_got
;
2327 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2329 /* Don't use the regular PLT for DF_BIND_NOW. */
2330 h
->plt
.offset
= (bfd_vma
) -1;
2332 /* Use the GOT PLT. */
2333 h
->got
.refcount
= 1;
2334 eh
->plt_got
.refcount
= 1;
2337 use_plt_got
= eh
->plt_got
.refcount
> 0;
2339 /* Make sure this symbol is output as a dynamic symbol.
2340 Undefined weak syms won't yet be marked as dynamic. */
2341 if (h
->dynindx
== -1
2342 && !h
->forced_local
)
2344 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2349 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2351 asection
*s
= htab
->elf
.splt
;
2352 asection
*got_s
= htab
->plt_got
;
2354 /* If this is the first .plt entry, make room for the special
2355 first entry. The .plt section is used by prelink to undo
2356 prelinking for dynamic relocations. */
2358 s
->size
= plt_entry_size
;
2361 eh
->plt_got
.offset
= got_s
->size
;
2363 h
->plt
.offset
= s
->size
;
2365 /* If this symbol is not defined in a regular file, and we are
2366 not generating a shared library, then set the symbol to this
2367 location in the .plt. This is required to make function
2368 pointers compare as equal between the normal executable and
2369 the shared library. */
2375 /* We need to make a call to the entry of the GOT PLT
2376 instead of regular PLT entry. */
2377 h
->root
.u
.def
.section
= got_s
;
2378 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2382 h
->root
.u
.def
.section
= s
;
2383 h
->root
.u
.def
.value
= h
->plt
.offset
;
2387 /* Make room for this entry. */
2389 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2392 s
->size
+= plt_entry_size
;
2394 /* We also need to make an entry in the .got.plt section,
2395 which will be placed in the .got section by the linker
2397 htab
->elf
.sgotplt
->size
+= 4;
2399 /* We also need to make an entry in the .rel.plt section. */
2400 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2401 htab
->elf
.srelplt
->reloc_count
++;
2404 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2407 /* VxWorks has a second set of relocations for each PLT entry
2408 in executables. They go in a separate relocation section,
2409 which is processed by the kernel loader. */
2411 /* There are two relocations for the initial PLT entry: an
2412 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2413 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2415 if (h
->plt
.offset
== plt_entry_size
)
2416 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2418 /* There are two extra relocations for each subsequent PLT entry:
2419 an R_386_32 relocation for the GOT entry, and an R_386_32
2420 relocation for the PLT entry. */
2422 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2427 h
->plt
.offset
= (bfd_vma
) -1;
2433 h
->plt
.offset
= (bfd_vma
) -1;
2437 eh
->tlsdesc_got
= (bfd_vma
) -1;
2439 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2440 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2441 if (h
->got
.refcount
> 0
2444 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2445 h
->got
.offset
= (bfd_vma
) -1;
2446 else if (h
->got
.refcount
> 0)
2450 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2452 /* Make sure this symbol is output as a dynamic symbol.
2453 Undefined weak syms won't yet be marked as dynamic. */
2454 if (h
->dynindx
== -1
2455 && !h
->forced_local
)
2457 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2462 if (GOT_TLS_GDESC_P (tls_type
))
2464 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2465 - elf_i386_compute_jump_table_size (htab
);
2466 htab
->elf
.sgotplt
->size
+= 8;
2467 h
->got
.offset
= (bfd_vma
) -2;
2469 if (! GOT_TLS_GDESC_P (tls_type
)
2470 || GOT_TLS_GD_P (tls_type
))
2472 h
->got
.offset
= s
->size
;
2474 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2475 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2478 dyn
= htab
->elf
.dynamic_sections_created
;
2479 /* R_386_TLS_IE_32 needs one dynamic relocation,
2480 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2481 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2482 need two), R_386_TLS_GD needs one if local symbol and two if
2484 if (tls_type
== GOT_TLS_IE_BOTH
)
2485 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2486 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2487 || (tls_type
& GOT_TLS_IE
))
2488 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2489 else if (GOT_TLS_GD_P (tls_type
))
2490 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2491 else if (! GOT_TLS_GDESC_P (tls_type
)
2492 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2493 || h
->root
.type
!= bfd_link_hash_undefweak
)
2495 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2496 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2497 if (GOT_TLS_GDESC_P (tls_type
))
2498 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2501 h
->got
.offset
= (bfd_vma
) -1;
2503 if (eh
->dyn_relocs
== NULL
)
2506 /* In the shared -Bsymbolic case, discard space allocated for
2507 dynamic pc-relative relocs against symbols which turn out to be
2508 defined in regular objects. For the normal shared case, discard
2509 space for pc-relative relocs that have become local due to symbol
2510 visibility changes. */
2514 /* The only reloc that uses pc_count is R_386_PC32, which will
2515 appear on a call or on something like ".long foo - .". We
2516 want calls to protected symbols to resolve directly to the
2517 function rather than going via the plt. If people want
2518 function pointer comparisons to work as expected then they
2519 should avoid writing assembly like ".long foo - .". */
2520 if (SYMBOL_CALLS_LOCAL (info
, h
))
2522 struct elf_dyn_relocs
**pp
;
2524 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2526 p
->count
-= p
->pc_count
;
2535 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2537 struct elf_dyn_relocs
**pp
;
2538 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2540 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2547 /* Also discard relocs on undefined weak syms with non-default
2549 if (eh
->dyn_relocs
!= NULL
2550 && h
->root
.type
== bfd_link_hash_undefweak
)
2552 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2553 eh
->dyn_relocs
= NULL
;
2555 /* Make sure undefined weak symbols are output as a dynamic
2557 else if (h
->dynindx
== -1
2558 && !h
->forced_local
)
2560 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2565 else if (ELIMINATE_COPY_RELOCS
)
2567 /* For the non-shared case, discard space for relocs against
2568 symbols which turn out to need copy relocs or are not
2574 || (htab
->elf
.dynamic_sections_created
2575 && (h
->root
.type
== bfd_link_hash_undefweak
2576 || h
->root
.type
== bfd_link_hash_undefined
))))
2578 /* Make sure this symbol is output as a dynamic symbol.
2579 Undefined weak syms won't yet be marked as dynamic. */
2580 if (h
->dynindx
== -1
2581 && !h
->forced_local
)
2583 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2587 /* If that succeeded, we know we'll be keeping all the
2589 if (h
->dynindx
!= -1)
2593 eh
->dyn_relocs
= NULL
;
2598 /* Finally, allocate space. */
2599 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2603 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2605 BFD_ASSERT (sreloc
!= NULL
);
2606 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2612 /* Allocate space in .plt, .got and associated reloc sections for
2613 local dynamic relocs. */
2616 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2618 struct elf_link_hash_entry
*h
2619 = (struct elf_link_hash_entry
*) *slot
;
2621 if (h
->type
!= STT_GNU_IFUNC
2625 || h
->root
.type
!= bfd_link_hash_defined
)
2628 return elf_i386_allocate_dynrelocs (h
, inf
);
2631 /* Find any dynamic relocs that apply to read-only sections. */
2634 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2636 struct elf_i386_link_hash_entry
*eh
;
2637 struct elf_dyn_relocs
*p
;
2639 /* Skip local IFUNC symbols. */
2640 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2643 eh
= (struct elf_i386_link_hash_entry
*) h
;
2644 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2646 asection
*s
= p
->sec
->output_section
;
2648 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2650 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2652 info
->flags
|= DF_TEXTREL
;
2654 if ((info
->warn_shared_textrel
&& info
->shared
)
2655 || info
->error_textrel
)
2656 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2657 p
->sec
->owner
, h
->root
.root
.string
,
2660 /* Not an error, just cut short the traversal. */
2668 mov foo@GOT(%reg), %reg
2670 lea foo@GOTOFF(%reg), %reg
2671 with the local symbol, foo. */
2674 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2675 struct bfd_link_info
*link_info
)
2677 Elf_Internal_Shdr
*symtab_hdr
;
2678 Elf_Internal_Rela
*internal_relocs
;
2679 Elf_Internal_Rela
*irel
, *irelend
;
2681 struct elf_i386_link_hash_table
*htab
;
2682 bfd_boolean changed_contents
;
2683 bfd_boolean changed_relocs
;
2684 bfd_signed_vma
*local_got_refcounts
;
2686 /* Don't even try to convert non-ELF outputs. */
2687 if (!is_elf_hash_table (link_info
->hash
))
2690 /* Nothing to do if there is no need or no output. */
2691 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2692 || sec
->need_convert_mov_to_lea
== 0
2693 || bfd_is_abs_section (sec
->output_section
))
2696 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2698 /* Load the relocations for this section. */
2699 internal_relocs
= (_bfd_elf_link_read_relocs
2700 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2701 link_info
->keep_memory
));
2702 if (internal_relocs
== NULL
)
2705 htab
= elf_i386_hash_table (link_info
);
2706 changed_contents
= FALSE
;
2707 changed_relocs
= FALSE
;
2708 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2710 /* Get the section contents. */
2711 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2712 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2715 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2719 irelend
= internal_relocs
+ sec
->reloc_count
;
2720 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2722 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2723 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2725 struct elf_link_hash_entry
*h
;
2727 if (r_type
!= R_386_GOT32
)
2730 /* Get the symbol referred to by the reloc. */
2731 if (r_symndx
< symtab_hdr
->sh_info
)
2733 Elf_Internal_Sym
*isym
;
2735 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2738 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2739 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2740 && irel
->r_offset
>= 2
2741 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2743 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2744 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2745 if (local_got_refcounts
!= NULL
2746 && local_got_refcounts
[r_symndx
] > 0)
2747 local_got_refcounts
[r_symndx
] -= 1;
2748 changed_contents
= TRUE
;
2749 changed_relocs
= TRUE
;
2754 indx
= r_symndx
- symtab_hdr
->sh_info
;
2755 h
= elf_sym_hashes (abfd
)[indx
];
2756 BFD_ASSERT (h
!= NULL
);
2758 while (h
->root
.type
== bfd_link_hash_indirect
2759 || h
->root
.type
== bfd_link_hash_warning
)
2760 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2762 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2763 optimizing _DYNAMIC since ld.so may use its link-time address. */
2765 && h
->type
!= STT_GNU_IFUNC
2766 && h
!= htab
->elf
.hdynamic
2767 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2768 && irel
->r_offset
>= 2
2769 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2771 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2772 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2773 if (h
->got
.refcount
> 0)
2774 h
->got
.refcount
-= 1;
2775 changed_contents
= TRUE
;
2776 changed_relocs
= TRUE
;
2780 if (contents
!= NULL
2781 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2783 if (!changed_contents
&& !link_info
->keep_memory
)
2787 /* Cache the section contents for elf_link_input_bfd. */
2788 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2792 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2794 if (!changed_relocs
)
2795 free (internal_relocs
);
2797 elf_section_data (sec
)->relocs
= internal_relocs
;
2803 if (contents
!= NULL
2804 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2806 if (internal_relocs
!= NULL
2807 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2808 free (internal_relocs
);
2812 /* Set the sizes of the dynamic sections. */
2815 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2817 struct elf_i386_link_hash_table
*htab
;
2823 htab
= elf_i386_hash_table (info
);
2826 dynobj
= htab
->elf
.dynobj
;
2830 if (htab
->elf
.dynamic_sections_created
)
2832 /* Set the contents of the .interp section to the interpreter. */
2833 if (info
->executable
)
2835 s
= bfd_get_linker_section (dynobj
, ".interp");
2838 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2839 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2843 /* Set up .got offsets for local syms, and space for local dynamic
2845 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2847 bfd_signed_vma
*local_got
;
2848 bfd_signed_vma
*end_local_got
;
2849 char *local_tls_type
;
2850 bfd_vma
*local_tlsdesc_gotent
;
2851 bfd_size_type locsymcount
;
2852 Elf_Internal_Shdr
*symtab_hdr
;
2855 if (! is_i386_elf (ibfd
))
2858 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2860 struct elf_dyn_relocs
*p
;
2862 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2865 for (p
= ((struct elf_dyn_relocs
*)
2866 elf_section_data (s
)->local_dynrel
);
2870 if (!bfd_is_abs_section (p
->sec
)
2871 && bfd_is_abs_section (p
->sec
->output_section
))
2873 /* Input section has been discarded, either because
2874 it is a copy of a linkonce section or due to
2875 linker script /DISCARD/, so we'll be discarding
2878 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2879 && strcmp (p
->sec
->output_section
->name
,
2882 /* Relocations in vxworks .tls_vars sections are
2883 handled specially by the loader. */
2885 else if (p
->count
!= 0)
2887 srel
= elf_section_data (p
->sec
)->sreloc
;
2888 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2889 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2890 && (info
->flags
& DF_TEXTREL
) == 0)
2892 info
->flags
|= DF_TEXTREL
;
2893 if ((info
->warn_shared_textrel
&& info
->shared
)
2894 || info
->error_textrel
)
2895 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2896 p
->sec
->owner
, p
->sec
);
2902 local_got
= elf_local_got_refcounts (ibfd
);
2906 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2907 locsymcount
= symtab_hdr
->sh_info
;
2908 end_local_got
= local_got
+ locsymcount
;
2909 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2910 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2912 srel
= htab
->elf
.srelgot
;
2913 for (; local_got
< end_local_got
;
2914 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2916 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2919 if (GOT_TLS_GDESC_P (*local_tls_type
))
2921 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2922 - elf_i386_compute_jump_table_size (htab
);
2923 htab
->elf
.sgotplt
->size
+= 8;
2924 *local_got
= (bfd_vma
) -2;
2926 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2927 || GOT_TLS_GD_P (*local_tls_type
))
2929 *local_got
= s
->size
;
2931 if (GOT_TLS_GD_P (*local_tls_type
)
2932 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2936 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2937 || (*local_tls_type
& GOT_TLS_IE
))
2939 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2940 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2941 else if (GOT_TLS_GD_P (*local_tls_type
)
2942 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2943 srel
->size
+= sizeof (Elf32_External_Rel
);
2944 if (GOT_TLS_GDESC_P (*local_tls_type
))
2945 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2949 *local_got
= (bfd_vma
) -1;
2953 if (htab
->tls_ldm_got
.refcount
> 0)
2955 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2957 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2958 htab
->elf
.sgot
->size
+= 8;
2959 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2962 htab
->tls_ldm_got
.offset
= -1;
2964 /* Allocate global sym .plt and .got entries, and space for global
2965 sym dynamic relocs. */
2966 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2968 /* Allocate .plt and .got entries, and space for local symbols. */
2969 htab_traverse (htab
->loc_hash_table
,
2970 elf_i386_allocate_local_dynrelocs
,
2973 /* For every jump slot reserved in the sgotplt, reloc_count is
2974 incremented. However, when we reserve space for TLS descriptors,
2975 it's not incremented, so in order to compute the space reserved
2976 for them, it suffices to multiply the reloc count by the jump
2979 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2980 so that R_386_IRELATIVE entries come last. */
2981 if (htab
->elf
.srelplt
)
2983 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2984 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2985 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2987 else if (htab
->elf
.irelplt
)
2988 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2991 if (htab
->elf
.sgotplt
)
2993 /* Don't allocate .got.plt section if there are no GOT nor PLT
2994 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2995 if ((htab
->elf
.hgot
== NULL
2996 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2997 && (htab
->elf
.sgotplt
->size
2998 == get_elf_backend_data (output_bfd
)->got_header_size
)
2999 && (htab
->elf
.splt
== NULL
3000 || htab
->elf
.splt
->size
== 0)
3001 && (htab
->elf
.sgot
== NULL
3002 || htab
->elf
.sgot
->size
== 0)
3003 && (htab
->elf
.iplt
== NULL
3004 || htab
->elf
.iplt
->size
== 0)
3005 && (htab
->elf
.igotplt
== NULL
3006 || htab
->elf
.igotplt
->size
== 0))
3007 htab
->elf
.sgotplt
->size
= 0;
3011 if (htab
->plt_eh_frame
!= NULL
3012 && htab
->elf
.splt
!= NULL
3013 && htab
->elf
.splt
->size
!= 0
3014 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3015 && _bfd_elf_eh_frame_present (info
))
3016 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
3018 /* We now have determined the sizes of the various dynamic sections.
3019 Allocate memory for them. */
3021 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3023 bfd_boolean strip_section
= TRUE
;
3025 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3028 if (s
== htab
->elf
.splt
3029 || s
== htab
->elf
.sgot
)
3031 /* Strip this section if we don't need it; see the
3033 /* We'd like to strip these sections if they aren't needed, but if
3034 we've exported dynamic symbols from them we must leave them.
3035 It's too late to tell BFD to get rid of the symbols. */
3037 if (htab
->elf
.hplt
!= NULL
)
3038 strip_section
= FALSE
;
3040 else if (s
== htab
->elf
.sgotplt
3041 || s
== htab
->elf
.iplt
3042 || s
== htab
->elf
.igotplt
3043 || s
== htab
->plt_got
3044 || s
== htab
->plt_eh_frame
3045 || s
== htab
->sdynbss
)
3047 /* Strip these too. */
3049 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3052 && s
!= htab
->elf
.srelplt
3053 && s
!= htab
->srelplt2
)
3056 /* We use the reloc_count field as a counter if we need
3057 to copy relocs into the output file. */
3062 /* It's not one of our sections, so don't allocate space. */
3068 /* If we don't need this section, strip it from the
3069 output file. This is mostly to handle .rel.bss and
3070 .rel.plt. We must create both sections in
3071 create_dynamic_sections, because they must be created
3072 before the linker maps input sections to output
3073 sections. The linker does that before
3074 adjust_dynamic_symbol is called, and it is that
3075 function which decides whether anything needs to go
3076 into these sections. */
3078 s
->flags
|= SEC_EXCLUDE
;
3082 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3085 /* Allocate memory for the section contents. We use bfd_zalloc
3086 here in case unused entries are not reclaimed before the
3087 section's contents are written out. This should not happen,
3088 but this way if it does, we get a R_386_NONE reloc instead
3090 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3091 if (s
->contents
== NULL
)
3095 if (htab
->plt_eh_frame
!= NULL
3096 && htab
->plt_eh_frame
->contents
!= NULL
)
3098 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3099 sizeof (elf_i386_eh_frame_plt
));
3100 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3101 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3104 if (htab
->elf
.dynamic_sections_created
)
3106 /* Add some entries to the .dynamic section. We fill in the
3107 values later, in elf_i386_finish_dynamic_sections, but we
3108 must add the entries now so that we get the correct size for
3109 the .dynamic section. The DT_DEBUG entry is filled in by the
3110 dynamic linker and used by the debugger. */
3111 #define add_dynamic_entry(TAG, VAL) \
3112 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3114 if (info
->executable
)
3116 if (!add_dynamic_entry (DT_DEBUG
, 0))
3120 if (htab
->elf
.splt
->size
!= 0)
3122 /* DT_PLTGOT is used by prelink even if there is no PLT
3124 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3127 if (htab
->elf
.srelplt
->size
!= 0)
3129 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3130 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3131 || !add_dynamic_entry (DT_JMPREL
, 0))
3138 if (!add_dynamic_entry (DT_REL
, 0)
3139 || !add_dynamic_entry (DT_RELSZ
, 0)
3140 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3143 /* If any dynamic relocs apply to a read-only section,
3144 then we need a DT_TEXTREL entry. */
3145 if ((info
->flags
& DF_TEXTREL
) == 0)
3146 elf_link_hash_traverse (&htab
->elf
,
3147 elf_i386_readonly_dynrelocs
, info
);
3149 if ((info
->flags
& DF_TEXTREL
) != 0)
3151 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3155 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3156 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3159 #undef add_dynamic_entry
3165 elf_i386_always_size_sections (bfd
*output_bfd
,
3166 struct bfd_link_info
*info
)
3168 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3172 struct elf_link_hash_entry
*tlsbase
;
3174 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3175 "_TLS_MODULE_BASE_",
3176 FALSE
, FALSE
, FALSE
);
3178 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3180 struct elf_i386_link_hash_table
*htab
;
3181 struct bfd_link_hash_entry
*bh
= NULL
;
3182 const struct elf_backend_data
*bed
3183 = get_elf_backend_data (output_bfd
);
3185 htab
= elf_i386_hash_table (info
);
3189 if (!(_bfd_generic_link_add_one_symbol
3190 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3191 tls_sec
, 0, NULL
, FALSE
,
3192 bed
->collect
, &bh
)))
3195 htab
->tls_module_base
= bh
;
3197 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3198 tlsbase
->def_regular
= 1;
3199 tlsbase
->other
= STV_HIDDEN
;
3200 tlsbase
->root
.linker_def
= 1;
3201 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3208 /* Set the correct type for an x86 ELF section. We do this by the
3209 section name, which is a hack, but ought to work. */
3212 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3213 Elf_Internal_Shdr
*hdr
,
3218 name
= bfd_get_section_name (abfd
, sec
);
3220 /* This is an ugly, but unfortunately necessary hack that is
3221 needed when producing EFI binaries on x86. It tells
3222 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3223 containing ELF relocation info. We need this hack in order to
3224 be able to generate ELF binaries that can be translated into
3225 EFI applications (which are essentially COFF objects). Those
3226 files contain a COFF ".reloc" section inside an ELFNN object,
3227 which would normally cause BFD to segfault because it would
3228 attempt to interpret this section as containing relocation
3229 entries for section "oc". With this hack enabled, ".reloc"
3230 will be treated as a normal data section, which will avoid the
3231 segfault. However, you won't be able to create an ELFNN binary
3232 with a section named "oc" that needs relocations, but that's
3233 the kind of ugly side-effects you get when detecting section
3234 types based on their names... In practice, this limitation is
3235 unlikely to bite. */
3236 if (strcmp (name
, ".reloc") == 0)
3237 hdr
->sh_type
= SHT_PROGBITS
;
3242 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3243 executables. Rather than setting it to the beginning of the TLS
3244 section, we have to set it to the end. This function may be called
3245 multiple times, it is idempotent. */
3248 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3250 struct elf_i386_link_hash_table
*htab
;
3251 struct bfd_link_hash_entry
*base
;
3253 if (!info
->executable
)
3256 htab
= elf_i386_hash_table (info
);
3260 base
= htab
->tls_module_base
;
3264 base
->u
.def
.value
= htab
->elf
.tls_size
;
3267 /* Return the base VMA address which should be subtracted from real addresses
3268 when resolving @dtpoff relocation.
3269 This is PT_TLS segment p_vaddr. */
3272 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3274 /* If tls_sec is NULL, we should have signalled an error already. */
3275 if (elf_hash_table (info
)->tls_sec
== NULL
)
3277 return elf_hash_table (info
)->tls_sec
->vma
;
3280 /* Return the relocation value for @tpoff relocation
3281 if STT_TLS virtual address is ADDRESS. */
3284 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3286 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3287 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3288 bfd_vma static_tls_size
;
3290 /* If tls_sec is NULL, we should have signalled an error already. */
3291 if (htab
->tls_sec
== NULL
)
3294 /* Consider special static TLS alignment requirements. */
3295 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3296 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3299 /* Relocate an i386 ELF section. */
3302 elf_i386_relocate_section (bfd
*output_bfd
,
3303 struct bfd_link_info
*info
,
3305 asection
*input_section
,
3307 Elf_Internal_Rela
*relocs
,
3308 Elf_Internal_Sym
*local_syms
,
3309 asection
**local_sections
)
3311 struct elf_i386_link_hash_table
*htab
;
3312 Elf_Internal_Shdr
*symtab_hdr
;
3313 struct elf_link_hash_entry
**sym_hashes
;
3314 bfd_vma
*local_got_offsets
;
3315 bfd_vma
*local_tlsdesc_gotents
;
3316 Elf_Internal_Rela
*rel
;
3317 Elf_Internal_Rela
*relend
;
3318 bfd_boolean is_vxworks_tls
;
3319 unsigned plt_entry_size
;
3321 BFD_ASSERT (is_i386_elf (input_bfd
));
3323 htab
= elf_i386_hash_table (info
);
3326 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3327 sym_hashes
= elf_sym_hashes (input_bfd
);
3328 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3329 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3330 /* We have to handle relocations in vxworks .tls_vars sections
3331 specially, because the dynamic loader is 'weird'. */
3332 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3334 && !strcmp (input_section
->output_section
->name
,
3337 elf_i386_set_tls_module_base (info
);
3339 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3342 relend
= relocs
+ input_section
->reloc_count
;
3343 for (; rel
< relend
; rel
++)
3345 unsigned int r_type
;
3346 reloc_howto_type
*howto
;
3347 unsigned long r_symndx
;
3348 struct elf_link_hash_entry
*h
;
3349 struct elf_i386_link_hash_entry
*eh
;
3350 Elf_Internal_Sym
*sym
;
3352 bfd_vma off
, offplt
, plt_offset
;
3354 bfd_boolean unresolved_reloc
;
3355 bfd_reloc_status_type r
;
3359 asection
*resolved_plt
;
3361 r_type
= ELF32_R_TYPE (rel
->r_info
);
3362 if (r_type
== R_386_GNU_VTINHERIT
3363 || r_type
== R_386_GNU_VTENTRY
)
3366 if ((indx
= r_type
) >= R_386_standard
3367 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3368 >= R_386_ext
- R_386_standard
)
3369 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3370 >= R_386_irelative
- R_386_ext
))
3372 (*_bfd_error_handler
)
3373 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3374 input_bfd
, input_section
, r_type
);
3375 bfd_set_error (bfd_error_bad_value
);
3378 howto
= elf_howto_table
+ indx
;
3380 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3384 unresolved_reloc
= FALSE
;
3385 if (r_symndx
< symtab_hdr
->sh_info
)
3387 sym
= local_syms
+ r_symndx
;
3388 sec
= local_sections
[r_symndx
];
3389 relocation
= (sec
->output_section
->vma
3390 + sec
->output_offset
3392 st_size
= sym
->st_size
;
3394 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3395 && ((sec
->flags
& SEC_MERGE
) != 0
3396 || (info
->relocatable
3397 && sec
->output_offset
!= 0)))
3400 bfd_byte
*where
= contents
+ rel
->r_offset
;
3402 switch (howto
->size
)
3405 addend
= bfd_get_8 (input_bfd
, where
);
3406 if (howto
->pc_relative
)
3408 addend
= (addend
^ 0x80) - 0x80;
3413 addend
= bfd_get_16 (input_bfd
, where
);
3414 if (howto
->pc_relative
)
3416 addend
= (addend
^ 0x8000) - 0x8000;
3421 addend
= bfd_get_32 (input_bfd
, where
);
3422 if (howto
->pc_relative
)
3424 addend
= (addend
^ 0x80000000) - 0x80000000;
3432 if (info
->relocatable
)
3433 addend
+= sec
->output_offset
;
3436 asection
*msec
= sec
;
3437 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3439 addend
-= relocation
;
3440 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3443 switch (howto
->size
)
3446 /* FIXME: overflow checks. */
3447 if (howto
->pc_relative
)
3449 bfd_put_8 (input_bfd
, addend
, where
);
3452 if (howto
->pc_relative
)
3454 bfd_put_16 (input_bfd
, addend
, where
);
3457 if (howto
->pc_relative
)
3459 bfd_put_32 (input_bfd
, addend
, where
);
3463 else if (!info
->relocatable
3464 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3466 /* Relocate against local STT_GNU_IFUNC symbol. */
3467 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3472 /* Set STT_GNU_IFUNC symbol value. */
3473 h
->root
.u
.def
.value
= sym
->st_value
;
3474 h
->root
.u
.def
.section
= sec
;
3479 bfd_boolean warned ATTRIBUTE_UNUSED
;
3480 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3482 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3483 r_symndx
, symtab_hdr
, sym_hashes
,
3485 unresolved_reloc
, warned
, ignored
);
3489 if (sec
!= NULL
&& discarded_section (sec
))
3490 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3491 rel
, 1, relend
, howto
, 0, contents
);
3493 if (info
->relocatable
)
3496 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3497 it here if it is defined in a non-shared object. */
3499 && h
->type
== STT_GNU_IFUNC
3502 asection
*plt
, *gotplt
, *base_got
;
3506 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3508 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3509 sections because such sections are not SEC_ALLOC and
3510 thus ld.so will not process them. */
3511 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
3515 else if (h
->plt
.offset
== (bfd_vma
) -1)
3518 /* STT_GNU_IFUNC symbol must go through PLT. */
3519 if (htab
->elf
.splt
!= NULL
)
3521 plt
= htab
->elf
.splt
;
3522 gotplt
= htab
->elf
.sgotplt
;
3526 plt
= htab
->elf
.iplt
;
3527 gotplt
= htab
->elf
.igotplt
;
3530 relocation
= (plt
->output_section
->vma
3531 + plt
->output_offset
+ h
->plt
.offset
);
3536 if (h
->root
.root
.string
)
3537 name
= h
->root
.root
.string
;
3539 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3541 (*_bfd_error_handler
)
3542 (_("%B: relocation %s against STT_GNU_IFUNC "
3543 "symbol `%s' isn't handled by %s"), input_bfd
,
3544 elf_howto_table
[r_type
].name
,
3545 name
, __FUNCTION__
);
3546 bfd_set_error (bfd_error_bad_value
);
3550 /* Generate dynamic relcoation only when there is a
3551 non-GOT reference in a shared object. */
3552 if (info
->shared
&& h
->non_got_ref
)
3554 Elf_Internal_Rela outrel
;
3558 /* Need a dynamic relocation to get the real function
3560 offset
= _bfd_elf_section_offset (output_bfd
,
3564 if (offset
== (bfd_vma
) -1
3565 || offset
== (bfd_vma
) -2)
3568 outrel
.r_offset
= (input_section
->output_section
->vma
3569 + input_section
->output_offset
3572 if (h
->dynindx
== -1
3574 || info
->executable
)
3576 /* This symbol is resolved locally. */
3577 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3578 bfd_put_32 (output_bfd
,
3579 (h
->root
.u
.def
.value
3580 + h
->root
.u
.def
.section
->output_section
->vma
3581 + h
->root
.u
.def
.section
->output_offset
),
3585 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3587 sreloc
= htab
->elf
.irelifunc
;
3588 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3590 /* If this reloc is against an external symbol, we
3591 do not want to fiddle with the addend. Otherwise,
3592 we need to include the symbol value so that it
3593 becomes an addend for the dynamic reloc. For an
3594 internal symbol, we have updated addend. */
3603 base_got
= htab
->elf
.sgot
;
3604 off
= h
->got
.offset
;
3606 if (base_got
== NULL
)
3609 if (off
== (bfd_vma
) -1)
3611 /* We can't use h->got.offset here to save state, or
3612 even just remember the offset, as finish_dynamic_symbol
3613 would use that as offset into .got. */
3615 if (htab
->elf
.splt
!= NULL
)
3617 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3618 off
= (plt_index
+ 3) * 4;
3619 base_got
= htab
->elf
.sgotplt
;
3623 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3624 off
= plt_index
* 4;
3625 base_got
= htab
->elf
.igotplt
;
3628 if (h
->dynindx
== -1
3632 /* This references the local defitionion. We must
3633 initialize this entry in the global offset table.
3634 Since the offset must always be a multiple of 8,
3635 we use the least significant bit to record
3636 whether we have initialized it already.
3638 When doing a dynamic link, we create a .rela.got
3639 relocation entry to initialize the value. This
3640 is done in the finish_dynamic_symbol routine. */
3645 bfd_put_32 (output_bfd
, relocation
,
3646 base_got
->contents
+ off
);
3653 /* Adjust for static executables. */
3654 if (htab
->elf
.splt
== NULL
)
3655 relocation
+= gotplt
->output_offset
;
3659 relocation
= (base_got
->output_section
->vma
3660 + base_got
->output_offset
+ off
3661 - gotplt
->output_section
->vma
3662 - gotplt
->output_offset
);
3663 /* Adjust for static executables. */
3664 if (htab
->elf
.splt
== NULL
)
3665 relocation
+= gotplt
->output_offset
;
3671 relocation
-= (gotplt
->output_section
->vma
3672 + gotplt
->output_offset
);
3680 /* Relocation is to the entry for this symbol in the global
3682 if (htab
->elf
.sgot
== NULL
)
3689 off
= h
->got
.offset
;
3690 dyn
= htab
->elf
.dynamic_sections_created
;
3691 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3693 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3694 || (ELF_ST_VISIBILITY (h
->other
)
3695 && h
->root
.type
== bfd_link_hash_undefweak
))
3697 /* This is actually a static link, or it is a
3698 -Bsymbolic link and the symbol is defined
3699 locally, or the symbol was forced to be local
3700 because of a version file. We must initialize
3701 this entry in the global offset table. Since the
3702 offset must always be a multiple of 4, we use the
3703 least significant bit to record whether we have
3704 initialized it already.
3706 When doing a dynamic link, we create a .rel.got
3707 relocation entry to initialize the value. This
3708 is done in the finish_dynamic_symbol routine. */
3713 bfd_put_32 (output_bfd
, relocation
,
3714 htab
->elf
.sgot
->contents
+ off
);
3719 unresolved_reloc
= FALSE
;
3723 if (local_got_offsets
== NULL
)
3726 off
= local_got_offsets
[r_symndx
];
3728 /* The offset must always be a multiple of 4. We use
3729 the least significant bit to record whether we have
3730 already generated the necessary reloc. */
3735 bfd_put_32 (output_bfd
, relocation
,
3736 htab
->elf
.sgot
->contents
+ off
);
3741 Elf_Internal_Rela outrel
;
3743 s
= htab
->elf
.srelgot
;
3747 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3748 + htab
->elf
.sgot
->output_offset
3750 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3751 elf_append_rel (output_bfd
, s
, &outrel
);
3754 local_got_offsets
[r_symndx
] |= 1;
3758 if (off
>= (bfd_vma
) -2)
3761 relocation
= htab
->elf
.sgot
->output_section
->vma
3762 + htab
->elf
.sgot
->output_offset
+ off
3763 - htab
->elf
.sgotplt
->output_section
->vma
3764 - htab
->elf
.sgotplt
->output_offset
;
3768 /* Relocation is relative to the start of the global offset
3771 /* Check to make sure it isn't a protected function or data
3772 symbol for shared library since it may not be local when
3773 used as function address or with copy relocation. We also
3774 need to make sure that a symbol is referenced locally. */
3775 if (!info
->executable
&& h
)
3777 if (!h
->def_regular
)
3781 switch (ELF_ST_VISIBILITY (h
->other
))
3784 v
= _("hidden symbol");
3787 v
= _("internal symbol");
3790 v
= _("protected symbol");
3797 (*_bfd_error_handler
)
3798 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3799 input_bfd
, v
, h
->root
.root
.string
);
3800 bfd_set_error (bfd_error_bad_value
);
3803 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
3804 && (h
->type
== STT_FUNC
3805 || h
->type
== STT_OBJECT
)
3806 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3808 (*_bfd_error_handler
)
3809 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3811 h
->type
== STT_FUNC
? "function" : "data",
3812 h
->root
.root
.string
);
3813 bfd_set_error (bfd_error_bad_value
);
3818 /* Note that sgot is not involved in this
3819 calculation. We always want the start of .got.plt. If we
3820 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3821 permitted by the ABI, we might have to change this
3823 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3824 + htab
->elf
.sgotplt
->output_offset
;
3828 /* Use global offset table as symbol value. */
3829 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3830 + htab
->elf
.sgotplt
->output_offset
;
3831 unresolved_reloc
= FALSE
;
3835 /* Relocation is to the entry for this symbol in the
3836 procedure linkage table. */
3838 /* Resolve a PLT32 reloc against a local symbol directly,
3839 without using the procedure linkage table. */
3843 eh
= (struct elf_i386_link_hash_entry
*) h
;
3844 if ((h
->plt
.offset
== (bfd_vma
) -1
3845 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3846 || htab
->elf
.splt
== NULL
)
3848 /* We didn't make a PLT entry for this symbol. This
3849 happens when statically linking PIC code, or when
3850 using -Bsymbolic. */
3854 if (h
->plt
.offset
!= (bfd_vma
) -1)
3856 resolved_plt
= htab
->elf
.splt
;
3857 plt_offset
= h
->plt
.offset
;
3861 resolved_plt
= htab
->plt_got
;
3862 plt_offset
= eh
->plt_got
.offset
;
3865 relocation
= (resolved_plt
->output_section
->vma
3866 + resolved_plt
->output_offset
3868 unresolved_reloc
= FALSE
;
3872 /* Set to symbol size. */
3873 relocation
= st_size
;
3878 if ((input_section
->flags
& SEC_ALLOC
) == 0
3884 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3885 || h
->root
.type
!= bfd_link_hash_undefweak
)
3886 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3887 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3888 || (ELIMINATE_COPY_RELOCS
3895 || h
->root
.type
== bfd_link_hash_undefweak
3896 || h
->root
.type
== bfd_link_hash_undefined
)))
3898 Elf_Internal_Rela outrel
;
3899 bfd_boolean skip
, relocate
;
3902 /* When generating a shared object, these relocations
3903 are copied into the output file to be resolved at run
3910 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3912 if (outrel
.r_offset
== (bfd_vma
) -1)
3914 else if (outrel
.r_offset
== (bfd_vma
) -2)
3915 skip
= TRUE
, relocate
= TRUE
;
3916 outrel
.r_offset
+= (input_section
->output_section
->vma
3917 + input_section
->output_offset
);
3920 memset (&outrel
, 0, sizeof outrel
);
3923 && (r_type
== R_386_PC32
3925 || !SYMBOLIC_BIND (info
, h
)
3926 || !h
->def_regular
))
3927 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3930 /* This symbol is local, or marked to become local. */
3932 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3935 sreloc
= elf_section_data (input_section
)->sreloc
;
3937 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3939 r
= bfd_reloc_notsupported
;
3940 goto check_relocation_error
;
3943 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3945 /* If this reloc is against an external symbol, we do
3946 not want to fiddle with the addend. Otherwise, we
3947 need to include the symbol value so that it becomes
3948 an addend for the dynamic reloc. */
3955 if (!info
->executable
)
3957 Elf_Internal_Rela outrel
;
3960 outrel
.r_offset
= rel
->r_offset
3961 + input_section
->output_section
->vma
3962 + input_section
->output_offset
;
3963 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3964 sreloc
= elf_section_data (input_section
)->sreloc
;
3967 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3972 case R_386_TLS_GOTDESC
:
3973 case R_386_TLS_DESC_CALL
:
3974 case R_386_TLS_IE_32
:
3975 case R_386_TLS_GOTIE
:
3976 tls_type
= GOT_UNKNOWN
;
3977 if (h
== NULL
&& local_got_offsets
)
3978 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3980 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3981 if (tls_type
== GOT_TLS_IE
)
3982 tls_type
= GOT_TLS_IE_NEG
;
3984 if (! elf_i386_tls_transition (info
, input_bfd
,
3985 input_section
, contents
,
3986 symtab_hdr
, sym_hashes
,
3987 &r_type
, tls_type
, rel
,
3988 relend
, h
, r_symndx
))
3991 if (r_type
== R_386_TLS_LE_32
)
3993 BFD_ASSERT (! unresolved_reloc
);
3994 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3999 /* GD->LE transition. */
4000 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4003 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4005 movl %gs:0, %eax; subl $foo@tpoff, %eax
4006 (6 byte form of subl). */
4007 memcpy (contents
+ rel
->r_offset
- 3,
4008 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4009 roff
= rel
->r_offset
+ 5;
4013 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4015 movl %gs:0, %eax; subl $foo@tpoff, %eax
4016 (6 byte form of subl). */
4017 memcpy (contents
+ rel
->r_offset
- 2,
4018 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4019 roff
= rel
->r_offset
+ 6;
4021 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4023 /* Skip R_386_PC32/R_386_PLT32. */
4027 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4029 /* GDesc -> LE transition.
4030 It's originally something like:
4031 leal x@tlsdesc(%ebx), %eax
4035 Registers other than %eax may be set up here. */
4040 roff
= rel
->r_offset
;
4041 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4043 /* Now modify the instruction as appropriate. */
4044 /* aoliva FIXME: remove the above and xor the byte
4046 bfd_put_8 (output_bfd
, val
^ 0x86,
4047 contents
+ roff
- 1);
4048 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4052 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4054 /* GDesc -> LE transition.
4062 roff
= rel
->r_offset
;
4063 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4064 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4067 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4071 /* IE->LE transition:
4072 Originally it can be one of:
4080 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4083 /* movl foo, %eax. */
4084 bfd_put_8 (output_bfd
, 0xb8,
4085 contents
+ rel
->r_offset
- 1);
4091 type
= bfd_get_8 (input_bfd
,
4092 contents
+ rel
->r_offset
- 2);
4097 bfd_put_8 (output_bfd
, 0xc7,
4098 contents
+ rel
->r_offset
- 2);
4099 bfd_put_8 (output_bfd
,
4100 0xc0 | ((val
>> 3) & 7),
4101 contents
+ rel
->r_offset
- 1);
4105 bfd_put_8 (output_bfd
, 0x81,
4106 contents
+ rel
->r_offset
- 2);
4107 bfd_put_8 (output_bfd
,
4108 0xc0 | ((val
>> 3) & 7),
4109 contents
+ rel
->r_offset
- 1);
4116 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4117 contents
+ rel
->r_offset
);
4122 unsigned int val
, type
;
4124 /* {IE_32,GOTIE}->LE transition:
4125 Originally it can be one of:
4126 subl foo(%reg1), %reg2
4127 movl foo(%reg1), %reg2
4128 addl foo(%reg1), %reg2
4131 movl $foo, %reg2 (6 byte form)
4132 addl $foo, %reg2. */
4133 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4134 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4138 bfd_put_8 (output_bfd
, 0xc7,
4139 contents
+ rel
->r_offset
- 2);
4140 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4141 contents
+ rel
->r_offset
- 1);
4143 else if (type
== 0x2b)
4146 bfd_put_8 (output_bfd
, 0x81,
4147 contents
+ rel
->r_offset
- 2);
4148 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4149 contents
+ rel
->r_offset
- 1);
4151 else if (type
== 0x03)
4154 bfd_put_8 (output_bfd
, 0x81,
4155 contents
+ rel
->r_offset
- 2);
4156 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4157 contents
+ rel
->r_offset
- 1);
4161 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4162 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4163 contents
+ rel
->r_offset
);
4165 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4166 contents
+ rel
->r_offset
);
4171 if (htab
->elf
.sgot
== NULL
)
4176 off
= h
->got
.offset
;
4177 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4181 if (local_got_offsets
== NULL
)
4184 off
= local_got_offsets
[r_symndx
];
4185 offplt
= local_tlsdesc_gotents
[r_symndx
];
4192 Elf_Internal_Rela outrel
;
4196 if (htab
->elf
.srelgot
== NULL
)
4199 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4201 if (GOT_TLS_GDESC_P (tls_type
))
4204 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4205 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4206 <= htab
->elf
.sgotplt
->size
);
4207 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4208 + htab
->elf
.sgotplt
->output_offset
4210 + htab
->sgotplt_jump_table_size
);
4211 sreloc
= htab
->elf
.srelplt
;
4212 loc
= sreloc
->contents
;
4213 loc
+= (htab
->next_tls_desc_index
++
4214 * sizeof (Elf32_External_Rel
));
4215 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4216 <= sreloc
->contents
+ sreloc
->size
);
4217 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4220 BFD_ASSERT (! unresolved_reloc
);
4221 bfd_put_32 (output_bfd
,
4222 relocation
- elf_i386_dtpoff_base (info
),
4223 htab
->elf
.sgotplt
->contents
+ offplt
4224 + htab
->sgotplt_jump_table_size
+ 4);
4228 bfd_put_32 (output_bfd
, 0,
4229 htab
->elf
.sgotplt
->contents
+ offplt
4230 + htab
->sgotplt_jump_table_size
+ 4);
4234 sreloc
= htab
->elf
.srelgot
;
4236 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4237 + htab
->elf
.sgot
->output_offset
+ off
);
4239 if (GOT_TLS_GD_P (tls_type
))
4240 dr_type
= R_386_TLS_DTPMOD32
;
4241 else if (GOT_TLS_GDESC_P (tls_type
))
4243 else if (tls_type
== GOT_TLS_IE_POS
)
4244 dr_type
= R_386_TLS_TPOFF
;
4246 dr_type
= R_386_TLS_TPOFF32
;
4248 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4249 bfd_put_32 (output_bfd
,
4250 relocation
- elf_i386_dtpoff_base (info
),
4251 htab
->elf
.sgot
->contents
+ off
);
4252 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4253 bfd_put_32 (output_bfd
,
4254 elf_i386_dtpoff_base (info
) - relocation
,
4255 htab
->elf
.sgot
->contents
+ off
);
4256 else if (dr_type
!= R_386_TLS_DESC
)
4257 bfd_put_32 (output_bfd
, 0,
4258 htab
->elf
.sgot
->contents
+ off
);
4259 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4261 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4263 if (GOT_TLS_GD_P (tls_type
))
4267 BFD_ASSERT (! unresolved_reloc
);
4268 bfd_put_32 (output_bfd
,
4269 relocation
- elf_i386_dtpoff_base (info
),
4270 htab
->elf
.sgot
->contents
+ off
+ 4);
4274 bfd_put_32 (output_bfd
, 0,
4275 htab
->elf
.sgot
->contents
+ off
+ 4);
4276 outrel
.r_info
= ELF32_R_INFO (indx
,
4277 R_386_TLS_DTPOFF32
);
4278 outrel
.r_offset
+= 4;
4279 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4282 else if (tls_type
== GOT_TLS_IE_BOTH
)
4284 bfd_put_32 (output_bfd
,
4286 ? relocation
- elf_i386_dtpoff_base (info
)
4288 htab
->elf
.sgot
->contents
+ off
+ 4);
4289 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4290 outrel
.r_offset
+= 4;
4291 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4298 local_got_offsets
[r_symndx
] |= 1;
4301 if (off
>= (bfd_vma
) -2
4302 && ! GOT_TLS_GDESC_P (tls_type
))
4304 if (r_type
== R_386_TLS_GOTDESC
4305 || r_type
== R_386_TLS_DESC_CALL
)
4307 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4308 unresolved_reloc
= FALSE
;
4310 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4312 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4313 + htab
->elf
.sgotplt
->output_offset
;
4314 relocation
= htab
->elf
.sgot
->output_section
->vma
4315 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4316 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4317 && tls_type
== GOT_TLS_IE_BOTH
)
4319 if (r_type
== R_386_TLS_IE
)
4320 relocation
+= g_o_t
;
4321 unresolved_reloc
= FALSE
;
4323 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4325 unsigned int val
, type
;
4328 /* GD->IE transition. */
4329 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4330 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4333 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4335 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4337 roff
= rel
->r_offset
- 3;
4341 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4343 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4344 roff
= rel
->r_offset
- 2;
4346 memcpy (contents
+ roff
,
4347 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4348 contents
[roff
+ 7] = 0x80 | (val
& 7);
4349 /* If foo is used only with foo@gotntpoff(%reg) and
4350 foo@indntpoff, but not with foo@gottpoff(%reg), change
4351 subl $foo@gottpoff(%reg), %eax
4353 addl $foo@gotntpoff(%reg), %eax. */
4354 if (tls_type
== GOT_TLS_IE_POS
)
4355 contents
[roff
+ 6] = 0x03;
4356 bfd_put_32 (output_bfd
,
4357 htab
->elf
.sgot
->output_section
->vma
4358 + htab
->elf
.sgot
->output_offset
+ off
4359 - htab
->elf
.sgotplt
->output_section
->vma
4360 - htab
->elf
.sgotplt
->output_offset
,
4361 contents
+ roff
+ 8);
4362 /* Skip R_386_PLT32. */
4366 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4368 /* GDesc -> IE transition.
4369 It's originally something like:
4370 leal x@tlsdesc(%ebx), %eax
4373 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4375 movl x@gottpoff(%ebx), %eax # before negl %eax
4377 Registers other than %eax may be set up here. */
4381 /* First, make sure it's a leal adding ebx to a 32-bit
4382 offset into any register, although it's probably
4383 almost always going to be eax. */
4384 roff
= rel
->r_offset
;
4386 /* Now modify the instruction as appropriate. */
4387 /* To turn a leal into a movl in the form we use it, it
4388 suffices to change the first byte from 0x8d to 0x8b.
4389 aoliva FIXME: should we decide to keep the leal, all
4390 we have to do is remove the statement below, and
4391 adjust the relaxation of R_386_TLS_DESC_CALL. */
4392 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4394 if (tls_type
== GOT_TLS_IE_BOTH
)
4397 bfd_put_32 (output_bfd
,
4398 htab
->elf
.sgot
->output_section
->vma
4399 + htab
->elf
.sgot
->output_offset
+ off
4400 - htab
->elf
.sgotplt
->output_section
->vma
4401 - htab
->elf
.sgotplt
->output_offset
,
4405 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4407 /* GDesc -> IE transition.
4415 depending on how we transformed the TLS_GOTDESC above.
4420 roff
= rel
->r_offset
;
4422 /* Now modify the instruction as appropriate. */
4423 if (tls_type
!= GOT_TLS_IE_NEG
)
4426 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4427 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4432 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4433 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4443 if (! elf_i386_tls_transition (info
, input_bfd
,
4444 input_section
, contents
,
4445 symtab_hdr
, sym_hashes
,
4446 &r_type
, GOT_UNKNOWN
, rel
,
4447 relend
, h
, r_symndx
))
4450 if (r_type
!= R_386_TLS_LDM
)
4452 /* LD->LE transition:
4453 leal foo(%reg), %eax; call ___tls_get_addr.
4455 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4456 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4457 memcpy (contents
+ rel
->r_offset
- 2,
4458 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4459 /* Skip R_386_PC32/R_386_PLT32. */
4464 if (htab
->elf
.sgot
== NULL
)
4467 off
= htab
->tls_ldm_got
.offset
;
4472 Elf_Internal_Rela outrel
;
4474 if (htab
->elf
.srelgot
== NULL
)
4477 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4478 + htab
->elf
.sgot
->output_offset
+ off
);
4480 bfd_put_32 (output_bfd
, 0,
4481 htab
->elf
.sgot
->contents
+ off
);
4482 bfd_put_32 (output_bfd
, 0,
4483 htab
->elf
.sgot
->contents
+ off
+ 4);
4484 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4485 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4486 htab
->tls_ldm_got
.offset
|= 1;
4488 relocation
= htab
->elf
.sgot
->output_section
->vma
4489 + htab
->elf
.sgot
->output_offset
+ off
4490 - htab
->elf
.sgotplt
->output_section
->vma
4491 - htab
->elf
.sgotplt
->output_offset
;
4492 unresolved_reloc
= FALSE
;
4495 case R_386_TLS_LDO_32
:
4496 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4497 relocation
-= elf_i386_dtpoff_base (info
);
4499 /* When converting LDO to LE, we must negate. */
4500 relocation
= -elf_i386_tpoff (info
, relocation
);
4503 case R_386_TLS_LE_32
:
4505 if (!info
->executable
)
4507 Elf_Internal_Rela outrel
;
4510 outrel
.r_offset
= rel
->r_offset
4511 + input_section
->output_section
->vma
4512 + input_section
->output_offset
;
4513 if (h
!= NULL
&& h
->dynindx
!= -1)
4517 if (r_type
== R_386_TLS_LE_32
)
4518 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4520 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4521 sreloc
= elf_section_data (input_section
)->sreloc
;
4524 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4527 else if (r_type
== R_386_TLS_LE_32
)
4528 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4530 relocation
-= elf_i386_dtpoff_base (info
);
4532 else if (r_type
== R_386_TLS_LE_32
)
4533 relocation
= elf_i386_tpoff (info
, relocation
);
4535 relocation
= -elf_i386_tpoff (info
, relocation
);
4542 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4543 because such sections are not SEC_ALLOC and thus ld.so will
4544 not process them. */
4545 if (unresolved_reloc
4546 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4548 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4549 rel
->r_offset
) != (bfd_vma
) -1)
4551 (*_bfd_error_handler
)
4552 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4555 (long) rel
->r_offset
,
4557 h
->root
.root
.string
);
4562 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4563 contents
, rel
->r_offset
,
4566 check_relocation_error
:
4567 if (r
!= bfd_reloc_ok
)
4572 name
= h
->root
.root
.string
;
4575 name
= bfd_elf_string_from_elf_section (input_bfd
,
4576 symtab_hdr
->sh_link
,
4581 name
= bfd_section_name (input_bfd
, sec
);
4584 if (r
== bfd_reloc_overflow
)
4586 if (! ((*info
->callbacks
->reloc_overflow
)
4587 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4588 (bfd_vma
) 0, input_bfd
, input_section
,
4594 (*_bfd_error_handler
)
4595 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4596 input_bfd
, input_section
,
4597 (long) rel
->r_offset
, name
, (int) r
);
4606 /* Finish up dynamic symbol handling. We set the contents of various
4607 dynamic sections here. */
4610 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4611 struct bfd_link_info
*info
,
4612 struct elf_link_hash_entry
*h
,
4613 Elf_Internal_Sym
*sym
)
4615 struct elf_i386_link_hash_table
*htab
;
4616 unsigned plt_entry_size
;
4617 const struct elf_i386_backend_data
*abed
;
4618 struct elf_i386_link_hash_entry
*eh
;
4620 htab
= elf_i386_hash_table (info
);
4624 abed
= get_elf_i386_backend_data (output_bfd
);
4625 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4627 eh
= (struct elf_i386_link_hash_entry
*) h
;
4629 if (h
->plt
.offset
!= (bfd_vma
) -1)
4633 Elf_Internal_Rela rel
;
4635 asection
*plt
, *gotplt
, *relplt
;
4637 /* When building a static executable, use .iplt, .igot.plt and
4638 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4639 if (htab
->elf
.splt
!= NULL
)
4641 plt
= htab
->elf
.splt
;
4642 gotplt
= htab
->elf
.sgotplt
;
4643 relplt
= htab
->elf
.srelplt
;
4647 plt
= htab
->elf
.iplt
;
4648 gotplt
= htab
->elf
.igotplt
;
4649 relplt
= htab
->elf
.irelplt
;
4652 /* This symbol has an entry in the procedure linkage table. Set
4655 if ((h
->dynindx
== -1
4656 && !((h
->forced_local
|| info
->executable
)
4658 && h
->type
== STT_GNU_IFUNC
))
4664 /* Get the index in the procedure linkage table which
4665 corresponds to this symbol. This is the index of this symbol
4666 in all the symbols for which we are making plt entries. The
4667 first entry in the procedure linkage table is reserved.
4669 Get the offset into the .got table of the entry that
4670 corresponds to this function. Each .got entry is 4 bytes.
4671 The first three are reserved.
4673 For static executables, we don't reserve anything. */
4675 if (plt
== htab
->elf
.splt
)
4677 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4678 got_offset
= (got_offset
+ 3) * 4;
4682 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4683 got_offset
= got_offset
* 4;
4686 /* Fill in the entry in the procedure linkage table. */
4689 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4690 abed
->plt
->plt_entry_size
);
4691 bfd_put_32 (output_bfd
,
4692 (gotplt
->output_section
->vma
4693 + gotplt
->output_offset
4695 plt
->contents
+ h
->plt
.offset
4696 + abed
->plt
->plt_got_offset
);
4698 if (abed
->is_vxworks
)
4700 int s
, k
, reloc_index
;
4702 /* Create the R_386_32 relocation referencing the GOT
4703 for this PLT entry. */
4705 /* S: Current slot number (zero-based). */
4706 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4707 / abed
->plt
->plt_entry_size
);
4708 /* K: Number of relocations for PLTResolve. */
4710 k
= PLTRESOLVE_RELOCS_SHLIB
;
4712 k
= PLTRESOLVE_RELOCS
;
4713 /* Skip the PLTresolve relocations, and the relocations for
4714 the other PLT slots. */
4715 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4716 loc
= (htab
->srelplt2
->contents
+ reloc_index
4717 * sizeof (Elf32_External_Rel
));
4719 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4720 + htab
->elf
.splt
->output_offset
4721 + h
->plt
.offset
+ 2),
4722 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4723 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4725 /* Create the R_386_32 relocation referencing the beginning of
4726 the PLT for this GOT entry. */
4727 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4728 + htab
->elf
.sgotplt
->output_offset
4730 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4731 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4732 loc
+ sizeof (Elf32_External_Rel
));
4737 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4738 abed
->plt
->plt_entry_size
);
4739 bfd_put_32 (output_bfd
, got_offset
,
4740 plt
->contents
+ h
->plt
.offset
4741 + abed
->plt
->plt_got_offset
);
4744 /* Fill in the entry in the global offset table. */
4745 bfd_put_32 (output_bfd
,
4746 (plt
->output_section
->vma
4747 + plt
->output_offset
4749 + abed
->plt
->plt_lazy_offset
),
4750 gotplt
->contents
+ got_offset
);
4752 /* Fill in the entry in the .rel.plt section. */
4753 rel
.r_offset
= (gotplt
->output_section
->vma
4754 + gotplt
->output_offset
4756 if (h
->dynindx
== -1
4757 || ((info
->executable
4758 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4760 && h
->type
== STT_GNU_IFUNC
))
4762 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4763 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4764 in the .got.plt section. */
4765 bfd_put_32 (output_bfd
,
4766 (h
->root
.u
.def
.value
4767 + h
->root
.u
.def
.section
->output_section
->vma
4768 + h
->root
.u
.def
.section
->output_offset
),
4769 gotplt
->contents
+ got_offset
);
4770 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4771 /* R_386_IRELATIVE comes last. */
4772 plt_index
= htab
->next_irelative_index
--;
4776 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4777 plt_index
= htab
->next_jump_slot_index
++;
4779 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4780 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4782 /* Don't fill PLT entry for static executables. */
4783 if (plt
== htab
->elf
.splt
)
4785 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4786 plt
->contents
+ h
->plt
.offset
4787 + abed
->plt
->plt_reloc_offset
);
4788 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4789 + abed
->plt
->plt_plt_offset
+ 4),
4790 plt
->contents
+ h
->plt
.offset
4791 + abed
->plt
->plt_plt_offset
);
4794 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4796 bfd_vma got_offset
, plt_offset
;
4797 asection
*plt
, *got
, *gotplt
;
4798 const bfd_byte
*got_plt_entry
;
4800 /* Offset of displacement of the indirect jump. */
4801 bfd_vma plt_got_offset
= 2;
4803 /* Set the entry in the GOT procedure linkage table. */
4804 plt
= htab
->plt_got
;
4805 got
= htab
->elf
.sgot
;
4806 gotplt
= htab
->elf
.sgotplt
;
4807 got_offset
= h
->got
.offset
;
4809 if (got_offset
== (bfd_vma
) -1
4815 /* Fill in the entry in the GOT procedure linkage table. */
4818 got_plt_entry
= elf_i386_got_plt_entry
;
4819 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4823 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4824 got_offset
+= (got
->output_section
->vma
4825 + got
->output_offset
4826 - gotplt
->output_section
->vma
4827 - gotplt
->output_offset
);
4830 plt_offset
= eh
->plt_got
.offset
;
4831 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4832 sizeof (elf_i386_got_plt_entry
));
4833 bfd_put_32 (output_bfd
, got_offset
,
4834 plt
->contents
+ plt_offset
+ plt_got_offset
);
4838 && (h
->plt
.offset
!= (bfd_vma
) -1
4839 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4841 /* Mark the symbol as undefined, rather than as defined in
4842 the .plt section. Leave the value if there were any
4843 relocations where pointer equality matters (this is a clue
4844 for the dynamic linker, to make function pointer
4845 comparisons work between an application and shared
4846 library), otherwise set it to zero. If a function is only
4847 called from a binary, there is no need to slow down
4848 shared libraries because of that. */
4849 sym
->st_shndx
= SHN_UNDEF
;
4850 if (!h
->pointer_equality_needed
)
4854 if (h
->got
.offset
!= (bfd_vma
) -1
4855 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4856 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4858 Elf_Internal_Rela rel
;
4860 /* This symbol has an entry in the global offset table. Set it
4863 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4866 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4867 + htab
->elf
.sgot
->output_offset
4868 + (h
->got
.offset
& ~(bfd_vma
) 1));
4870 /* If this is a static link, or it is a -Bsymbolic link and the
4871 symbol is defined locally or was forced to be local because
4872 of a version file, we just want to emit a RELATIVE reloc.
4873 The entry in the global offset table will already have been
4874 initialized in the relocate_section function. */
4876 && h
->type
== STT_GNU_IFUNC
)
4880 /* Generate R_386_GLOB_DAT. */
4887 if (!h
->pointer_equality_needed
)
4890 /* For non-shared object, we can't use .got.plt, which
4891 contains the real function addres if we need pointer
4892 equality. We load the GOT entry with the PLT entry. */
4893 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4894 bfd_put_32 (output_bfd
,
4895 (plt
->output_section
->vma
4896 + plt
->output_offset
+ h
->plt
.offset
),
4897 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4901 else if (info
->shared
4902 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4904 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4905 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4909 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4911 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4912 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4913 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4916 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4921 Elf_Internal_Rela rel
;
4923 /* This symbol needs a copy reloc. Set it up. */
4925 if (h
->dynindx
== -1
4926 || (h
->root
.type
!= bfd_link_hash_defined
4927 && h
->root
.type
!= bfd_link_hash_defweak
)
4928 || htab
->srelbss
== NULL
)
4931 rel
.r_offset
= (h
->root
.u
.def
.value
4932 + h
->root
.u
.def
.section
->output_section
->vma
4933 + h
->root
.u
.def
.section
->output_offset
);
4934 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4935 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4941 /* Finish up local dynamic symbol handling. We set the contents of
4942 various dynamic sections here. */
4945 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4947 struct elf_link_hash_entry
*h
4948 = (struct elf_link_hash_entry
*) *slot
;
4949 struct bfd_link_info
*info
4950 = (struct bfd_link_info
*) inf
;
4952 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4956 /* Used to decide how to sort relocs in an optimal manner for the
4957 dynamic linker, before writing them out. */
4959 static enum elf_reloc_type_class
4960 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4961 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4962 const Elf_Internal_Rela
*rela
)
4964 switch (ELF32_R_TYPE (rela
->r_info
))
4966 case R_386_RELATIVE
:
4967 return reloc_class_relative
;
4968 case R_386_JUMP_SLOT
:
4969 return reloc_class_plt
;
4971 return reloc_class_copy
;
4973 return reloc_class_normal
;
4977 /* Finish up the dynamic sections. */
4980 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4981 struct bfd_link_info
*info
)
4983 struct elf_i386_link_hash_table
*htab
;
4986 const struct elf_i386_backend_data
*abed
;
4988 htab
= elf_i386_hash_table (info
);
4992 dynobj
= htab
->elf
.dynobj
;
4993 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4994 abed
= get_elf_i386_backend_data (output_bfd
);
4996 if (htab
->elf
.dynamic_sections_created
)
4998 Elf32_External_Dyn
*dyncon
, *dynconend
;
5000 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5003 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5004 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5005 for (; dyncon
< dynconend
; dyncon
++)
5007 Elf_Internal_Dyn dyn
;
5010 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5015 if (abed
->is_vxworks
5016 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5021 s
= htab
->elf
.sgotplt
;
5022 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5026 s
= htab
->elf
.srelplt
;
5027 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5031 s
= htab
->elf
.srelplt
;
5032 dyn
.d_un
.d_val
= s
->size
;
5036 /* My reading of the SVR4 ABI indicates that the
5037 procedure linkage table relocs (DT_JMPREL) should be
5038 included in the overall relocs (DT_REL). This is
5039 what Solaris does. However, UnixWare can not handle
5040 that case. Therefore, we override the DT_RELSZ entry
5041 here to make it not include the JMPREL relocs. */
5042 s
= htab
->elf
.srelplt
;
5045 dyn
.d_un
.d_val
-= s
->size
;
5049 /* We may not be using the standard ELF linker script.
5050 If .rel.plt is the first .rel section, we adjust
5051 DT_REL to not include it. */
5052 s
= htab
->elf
.srelplt
;
5055 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5057 dyn
.d_un
.d_ptr
+= s
->size
;
5061 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5064 /* Fill in the first entry in the procedure linkage table. */
5065 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5069 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5070 abed
->plt
->plt0_entry_size
);
5071 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5072 abed
->plt0_pad_byte
,
5073 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5077 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5078 abed
->plt
->plt0_entry_size
);
5079 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5080 abed
->plt0_pad_byte
,
5081 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5082 bfd_put_32 (output_bfd
,
5083 (htab
->elf
.sgotplt
->output_section
->vma
5084 + htab
->elf
.sgotplt
->output_offset
5086 htab
->elf
.splt
->contents
5087 + abed
->plt
->plt0_got1_offset
);
5088 bfd_put_32 (output_bfd
,
5089 (htab
->elf
.sgotplt
->output_section
->vma
5090 + htab
->elf
.sgotplt
->output_offset
5092 htab
->elf
.splt
->contents
5093 + abed
->plt
->plt0_got2_offset
);
5095 if (abed
->is_vxworks
)
5097 Elf_Internal_Rela rel
;
5099 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5100 On IA32 we use REL relocations so the addend goes in
5101 the PLT directly. */
5102 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5103 + htab
->elf
.splt
->output_offset
5104 + abed
->plt
->plt0_got1_offset
);
5105 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5106 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5107 htab
->srelplt2
->contents
);
5108 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5109 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5110 + htab
->elf
.splt
->output_offset
5111 + abed
->plt
->plt0_got2_offset
);
5112 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5113 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5114 htab
->srelplt2
->contents
+
5115 sizeof (Elf32_External_Rel
));
5119 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5120 really seem like the right value. */
5121 elf_section_data (htab
->elf
.splt
->output_section
)
5122 ->this_hdr
.sh_entsize
= 4;
5124 /* Correct the .rel.plt.unloaded relocations. */
5125 if (abed
->is_vxworks
&& !info
->shared
)
5127 int num_plts
= (htab
->elf
.splt
->size
5128 / abed
->plt
->plt_entry_size
) - 1;
5131 p
= htab
->srelplt2
->contents
;
5133 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5135 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5137 for (; num_plts
; num_plts
--)
5139 Elf_Internal_Rela rel
;
5140 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5141 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5142 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5143 p
+= sizeof (Elf32_External_Rel
);
5145 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5146 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5147 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5148 p
+= sizeof (Elf32_External_Rel
);
5154 if (htab
->elf
.sgotplt
)
5156 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5158 (*_bfd_error_handler
)
5159 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5163 /* Fill in the first three entries in the global offset table. */
5164 if (htab
->elf
.sgotplt
->size
> 0)
5166 bfd_put_32 (output_bfd
,
5168 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5169 htab
->elf
.sgotplt
->contents
);
5170 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5171 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5174 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5177 /* Adjust .eh_frame for .plt section. */
5178 if (htab
->plt_eh_frame
!= NULL
5179 && htab
->plt_eh_frame
->contents
!= NULL
)
5181 if (htab
->elf
.splt
!= NULL
5182 && htab
->elf
.splt
->size
!= 0
5183 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5184 && htab
->elf
.splt
->output_section
!= NULL
5185 && htab
->plt_eh_frame
->output_section
!= NULL
)
5187 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5188 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5189 + htab
->plt_eh_frame
->output_offset
5190 + PLT_FDE_START_OFFSET
;
5191 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5192 htab
->plt_eh_frame
->contents
5193 + PLT_FDE_START_OFFSET
);
5195 if (htab
->plt_eh_frame
->sec_info_type
5196 == SEC_INFO_TYPE_EH_FRAME
)
5198 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5200 htab
->plt_eh_frame
->contents
))
5205 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5206 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5208 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5209 htab_traverse (htab
->loc_hash_table
,
5210 elf_i386_finish_local_dynamic_symbol
,
5216 /* Return an array of PLT entry symbol values. */
5219 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5222 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5225 bfd_vma
*plt_sym_val
;
5227 bfd_byte
*plt_contents
;
5228 const struct elf_i386_backend_data
*bed
5229 = get_elf_i386_backend_data (abfd
);
5230 Elf_Internal_Shdr
*hdr
;
5232 /* Get the .plt section contents. */
5233 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5234 if (plt_contents
== NULL
)
5236 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5237 plt_contents
, 0, plt
->size
))
5240 free (plt_contents
);
5244 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5245 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5248 hdr
= &elf_section_data (relplt
)->this_hdr
;
5249 count
= relplt
->size
/ hdr
->sh_entsize
;
5251 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5252 if (plt_sym_val
== NULL
)
5255 for (i
= 0; i
< count
; i
++)
5256 plt_sym_val
[i
] = -1;
5258 plt_offset
= bed
->plt
->plt_entry_size
;
5259 p
= relplt
->relocation
;
5260 for (i
= 0; i
< count
; i
++, p
++)
5264 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5265 if (p
->howto
== NULL
)
5268 if (p
->howto
->type
!= R_386_JUMP_SLOT
5269 && p
->howto
->type
!= R_386_IRELATIVE
)
5272 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5273 + bed
->plt
->plt_reloc_offset
));
5274 reloc_index
/= sizeof (Elf32_External_Rel
);
5275 if (reloc_index
>= count
)
5277 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5278 plt_offset
+= bed
->plt
->plt_entry_size
;
5280 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5282 if (plt_offset
>= plt
->size
)
5286 free (plt_contents
);
5291 /* Similar to _bfd_elf_get_synthetic_symtab. */
5294 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5301 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5302 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5303 dynsymcount
, dynsyms
, ret
,
5305 elf_i386_get_plt_sym_val
);
5308 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5311 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5313 if (h
->plt
.offset
!= (bfd_vma
) -1
5315 && !h
->pointer_equality_needed
)
5318 return _bfd_elf_hash_symbol (h
);
5321 /* Hook called by the linker routine which adds symbols from an object
5325 elf_i386_add_symbol_hook (bfd
* abfd
,
5326 struct bfd_link_info
* info
,
5327 Elf_Internal_Sym
* sym
,
5328 const char ** namep ATTRIBUTE_UNUSED
,
5329 flagword
* flagsp ATTRIBUTE_UNUSED
,
5330 asection
** secp ATTRIBUTE_UNUSED
,
5331 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5333 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5334 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5335 && (abfd
->flags
& DYNAMIC
) == 0
5336 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5337 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5342 #define TARGET_LITTLE_SYM i386_elf32_vec
5343 #define TARGET_LITTLE_NAME "elf32-i386"
5344 #define ELF_ARCH bfd_arch_i386
5345 #define ELF_TARGET_ID I386_ELF_DATA
5346 #define ELF_MACHINE_CODE EM_386
5347 #define ELF_MAXPAGESIZE 0x1000
5349 #define elf_backend_can_gc_sections 1
5350 #define elf_backend_can_refcount 1
5351 #define elf_backend_want_got_plt 1
5352 #define elf_backend_plt_readonly 1
5353 #define elf_backend_want_plt_sym 0
5354 #define elf_backend_got_header_size 12
5355 #define elf_backend_plt_alignment 4
5356 #define elf_backend_extern_protected_data 1
5358 /* Support RELA for objdump of prelink objects. */
5359 #define elf_info_to_howto elf_i386_info_to_howto_rel
5360 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5362 #define bfd_elf32_mkobject elf_i386_mkobject
5364 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5365 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5366 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5367 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5368 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5370 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5371 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5372 #define elf_backend_check_relocs elf_i386_check_relocs
5373 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5374 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5375 #define elf_backend_fake_sections elf_i386_fake_sections
5376 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5377 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5378 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5379 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5380 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5381 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5382 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5383 #define elf_backend_relocate_section elf_i386_relocate_section
5384 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5385 #define elf_backend_always_size_sections elf_i386_always_size_sections
5386 #define elf_backend_omit_section_dynsym \
5387 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5388 #define elf_backend_hash_symbol elf_i386_hash_symbol
5389 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5391 #include "elf32-target.h"
5393 /* FreeBSD support. */
5395 #undef TARGET_LITTLE_SYM
5396 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5397 #undef TARGET_LITTLE_NAME
5398 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5400 #define ELF_OSABI ELFOSABI_FREEBSD
5402 /* The kernel recognizes executables as valid only if they carry a
5403 "FreeBSD" label in the ELF header. So we put this label on all
5404 executables and (for simplicity) also all other object files. */
5407 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5409 _bfd_elf_post_process_headers (abfd
, info
);
5411 #ifdef OLD_FREEBSD_ABI_LABEL
5413 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5414 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5415 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5420 #undef elf_backend_post_process_headers
5421 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5423 #define elf32_bed elf32_i386_fbsd_bed
5425 #undef elf_backend_add_symbol_hook
5427 #include "elf32-target.h"
5431 #undef TARGET_LITTLE_SYM
5432 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5433 #undef TARGET_LITTLE_NAME
5434 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5436 #undef elf_backend_post_process_headers
5438 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5439 objects won't be recognized. */
5443 #define elf32_bed elf32_i386_sol2_bed
5445 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5447 #undef elf_backend_static_tls_alignment
5448 #define elf_backend_static_tls_alignment 8
5450 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5452 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5454 #undef elf_backend_want_plt_sym
5455 #define elf_backend_want_plt_sym 1
5457 #include "elf32-target.h"
5459 /* Intel MCU support. */
5462 elf32_iamcu_elf_object_p (bfd
*abfd
)
5464 /* Set the right machine number for an IAMCU elf32 file. */
5465 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
5469 #undef TARGET_LITTLE_SYM
5470 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5471 #undef TARGET_LITTLE_NAME
5472 #define TARGET_LITTLE_NAME "elf32-iamcu"
5474 #define ELF_ARCH bfd_arch_iamcu
5476 #undef ELF_MACHINE_CODE
5477 #define ELF_MACHINE_CODE EM_IAMCU
5482 #define elf32_bed elf32_iamcu_bed
5484 #undef elf_backend_object_p
5485 #define elf_backend_object_p elf32_iamcu_elf_object_p
5487 #undef elf_backend_static_tls_alignment
5489 #undef elf_backend_want_plt_sym
5490 #define elf_backend_want_plt_sym 0
5492 #include "elf32-target.h"
5494 /* Restore defaults. */
5496 #define ELF_ARCH bfd_arch_i386
5497 #undef ELF_MACHINE_CODE
5498 #define ELF_MACHINE_CODE EM_386
5500 /* Native Client support. */
5502 #undef TARGET_LITTLE_SYM
5503 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5504 #undef TARGET_LITTLE_NAME
5505 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5507 #define elf32_bed elf32_i386_nacl_bed
5509 #undef ELF_MAXPAGESIZE
5510 #define ELF_MAXPAGESIZE 0x10000
5512 /* Restore defaults. */
5514 #undef elf_backend_want_plt_sym
5515 #define elf_backend_want_plt_sym 0
5516 #undef elf_backend_post_process_headers
5517 #undef elf_backend_static_tls_alignment
5519 /* NaCl uses substantially different PLT entries for the same effects. */
5521 #undef elf_backend_plt_alignment
5522 #define elf_backend_plt_alignment 5
5523 #define NACL_PLT_ENTRY_SIZE 64
5524 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5526 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5528 0xff, 0x35, /* pushl contents of address */
5529 0, 0, 0, 0, /* replaced with address of .got + 4. */
5530 0x8b, 0x0d, /* movl contents of address, %ecx */
5531 0, 0, 0, 0, /* replaced with address of .got + 8. */
5532 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5533 0xff, 0xe1 /* jmp *%ecx */
5536 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5538 0x8b, 0x0d, /* movl contents of address, %ecx */
5539 0, 0, 0, 0, /* replaced with GOT slot address. */
5540 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5541 0xff, 0xe1, /* jmp *%ecx */
5543 /* Pad to the next 32-byte boundary with nop instructions. */
5545 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5546 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5548 /* Lazy GOT entries point here (32-byte aligned). */
5549 0x68, /* pushl immediate */
5550 0, 0, 0, 0, /* replaced with reloc offset. */
5551 0xe9, /* jmp relative */
5552 0, 0, 0, 0, /* replaced with offset to .plt. */
5554 /* Pad to the next 32-byte boundary with nop instructions. */
5555 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5556 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5560 static const bfd_byte
5561 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5563 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5564 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5565 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5566 0xff, 0xe1, /* jmp *%ecx */
5568 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5569 so pad to that size with nop instructions. */
5570 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5573 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5575 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5576 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5577 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5578 0xff, 0xe1, /* jmp *%ecx */
5580 /* Pad to the next 32-byte boundary with nop instructions. */
5582 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5583 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5585 /* Lazy GOT entries point here (32-byte aligned). */
5586 0x68, /* pushl immediate */
5587 0, 0, 0, 0, /* replaced with offset into relocation table. */
5588 0xe9, /* jmp relative */
5589 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5591 /* Pad to the next 32-byte boundary with nop instructions. */
5592 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5593 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5597 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5599 #if (PLT_CIE_LENGTH != 20 \
5600 || PLT_FDE_LENGTH != 36 \
5601 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5602 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5603 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5605 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5606 0, 0, 0, 0, /* CIE ID */
5607 1, /* CIE version */
5608 'z', 'R', 0, /* Augmentation string */
5609 1, /* Code alignment factor */
5610 0x7c, /* Data alignment factor: -4 */
5611 8, /* Return address column */
5612 1, /* Augmentation size */
5613 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5614 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5615 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5616 DW_CFA_nop
, DW_CFA_nop
,
5618 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5619 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5620 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5621 0, 0, 0, 0, /* .plt size goes here */
5622 0, /* Augmentation size */
5623 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5624 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5625 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5626 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5627 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5628 13, /* Block length */
5629 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5630 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5631 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5632 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5633 DW_CFA_nop
, DW_CFA_nop
5636 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5638 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5639 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5640 2, /* plt0_got1_offset */
5641 8, /* plt0_got2_offset */
5642 elf_i386_nacl_plt_entry
, /* plt_entry */
5643 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5644 2, /* plt_got_offset */
5645 33, /* plt_reloc_offset */
5646 38, /* plt_plt_offset */
5647 32, /* plt_lazy_offset */
5648 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5649 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5650 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5651 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5654 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5656 &elf_i386_nacl_plt
, /* plt */
5657 0x90, /* plt0_pad_byte: nop insn */
5662 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5664 /* Set the right machine number for a NaCl i386 ELF32 file. */
5665 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5669 #undef elf_backend_arch_data
5670 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5672 #undef elf_backend_object_p
5673 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5674 #undef elf_backend_modify_segment_map
5675 #define elf_backend_modify_segment_map nacl_modify_segment_map
5676 #undef elf_backend_modify_program_headers
5677 #define elf_backend_modify_program_headers nacl_modify_program_headers
5678 #undef elf_backend_final_write_processing
5679 #define elf_backend_final_write_processing nacl_final_write_processing
5681 #include "elf32-target.h"
5683 /* Restore defaults. */
5684 #undef elf_backend_object_p
5685 #undef elf_backend_modify_segment_map
5686 #undef elf_backend_modify_program_headers
5687 #undef elf_backend_final_write_processing
5689 /* VxWorks support. */
5691 #undef TARGET_LITTLE_SYM
5692 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5693 #undef TARGET_LITTLE_NAME
5694 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5696 #undef elf_backend_plt_alignment
5697 #define elf_backend_plt_alignment 4
5699 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5701 &elf_i386_plt
, /* plt */
5702 0x90, /* plt0_pad_byte */
5706 #undef elf_backend_arch_data
5707 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5709 #undef elf_backend_relocs_compatible
5710 #undef elf_backend_add_symbol_hook
5711 #define elf_backend_add_symbol_hook \
5712 elf_vxworks_add_symbol_hook
5713 #undef elf_backend_link_output_symbol_hook
5714 #define elf_backend_link_output_symbol_hook \
5715 elf_vxworks_link_output_symbol_hook
5716 #undef elf_backend_emit_relocs
5717 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5718 #undef elf_backend_final_write_processing
5719 #define elf_backend_final_write_processing \
5720 elf_vxworks_final_write_processing
5721 #undef elf_backend_static_tls_alignment
5723 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5725 #undef elf_backend_want_plt_sym
5726 #define elf_backend_want_plt_sym 1
5729 #define elf32_bed elf32_i386_vxworks_bed
5731 #include "elf32-target.h"