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
3507 || h
->plt
.offset
== (bfd_vma
) -1)
3510 /* STT_GNU_IFUNC symbol must go through PLT. */
3511 if (htab
->elf
.splt
!= NULL
)
3513 plt
= htab
->elf
.splt
;
3514 gotplt
= htab
->elf
.sgotplt
;
3518 plt
= htab
->elf
.iplt
;
3519 gotplt
= htab
->elf
.igotplt
;
3522 relocation
= (plt
->output_section
->vma
3523 + plt
->output_offset
+ h
->plt
.offset
);
3528 if (h
->root
.root
.string
)
3529 name
= h
->root
.root
.string
;
3531 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3533 (*_bfd_error_handler
)
3534 (_("%B: relocation %s against STT_GNU_IFUNC "
3535 "symbol `%s' isn't handled by %s"), input_bfd
,
3536 elf_howto_table
[r_type
].name
,
3537 name
, __FUNCTION__
);
3538 bfd_set_error (bfd_error_bad_value
);
3542 /* Generate dynamic relcoation only when there is a
3543 non-GOT reference in a shared object. */
3544 if (info
->shared
&& h
->non_got_ref
)
3546 Elf_Internal_Rela outrel
;
3550 /* Need a dynamic relocation to get the real function
3552 offset
= _bfd_elf_section_offset (output_bfd
,
3556 if (offset
== (bfd_vma
) -1
3557 || offset
== (bfd_vma
) -2)
3560 outrel
.r_offset
= (input_section
->output_section
->vma
3561 + input_section
->output_offset
3564 if (h
->dynindx
== -1
3566 || info
->executable
)
3568 /* This symbol is resolved locally. */
3569 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3570 bfd_put_32 (output_bfd
,
3571 (h
->root
.u
.def
.value
3572 + h
->root
.u
.def
.section
->output_section
->vma
3573 + h
->root
.u
.def
.section
->output_offset
),
3577 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3579 sreloc
= htab
->elf
.irelifunc
;
3580 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3582 /* If this reloc is against an external symbol, we
3583 do not want to fiddle with the addend. Otherwise,
3584 we need to include the symbol value so that it
3585 becomes an addend for the dynamic reloc. For an
3586 internal symbol, we have updated addend. */
3595 base_got
= htab
->elf
.sgot
;
3596 off
= h
->got
.offset
;
3598 if (base_got
== NULL
)
3601 if (off
== (bfd_vma
) -1)
3603 /* We can't use h->got.offset here to save state, or
3604 even just remember the offset, as finish_dynamic_symbol
3605 would use that as offset into .got. */
3607 if (htab
->elf
.splt
!= NULL
)
3609 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3610 off
= (plt_index
+ 3) * 4;
3611 base_got
= htab
->elf
.sgotplt
;
3615 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3616 off
= plt_index
* 4;
3617 base_got
= htab
->elf
.igotplt
;
3620 if (h
->dynindx
== -1
3624 /* This references the local defitionion. We must
3625 initialize this entry in the global offset table.
3626 Since the offset must always be a multiple of 8,
3627 we use the least significant bit to record
3628 whether we have initialized it already.
3630 When doing a dynamic link, we create a .rela.got
3631 relocation entry to initialize the value. This
3632 is done in the finish_dynamic_symbol routine. */
3637 bfd_put_32 (output_bfd
, relocation
,
3638 base_got
->contents
+ off
);
3645 /* Adjust for static executables. */
3646 if (htab
->elf
.splt
== NULL
)
3647 relocation
+= gotplt
->output_offset
;
3651 relocation
= (base_got
->output_section
->vma
3652 + base_got
->output_offset
+ off
3653 - gotplt
->output_section
->vma
3654 - gotplt
->output_offset
);
3655 /* Adjust for static executables. */
3656 if (htab
->elf
.splt
== NULL
)
3657 relocation
+= gotplt
->output_offset
;
3663 relocation
-= (gotplt
->output_section
->vma
3664 + gotplt
->output_offset
);
3672 /* Relocation is to the entry for this symbol in the global
3674 if (htab
->elf
.sgot
== NULL
)
3681 off
= h
->got
.offset
;
3682 dyn
= htab
->elf
.dynamic_sections_created
;
3683 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3685 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3686 || (ELF_ST_VISIBILITY (h
->other
)
3687 && h
->root
.type
== bfd_link_hash_undefweak
))
3689 /* This is actually a static link, or it is a
3690 -Bsymbolic link and the symbol is defined
3691 locally, or the symbol was forced to be local
3692 because of a version file. We must initialize
3693 this entry in the global offset table. Since the
3694 offset must always be a multiple of 4, we use the
3695 least significant bit to record whether we have
3696 initialized it already.
3698 When doing a dynamic link, we create a .rel.got
3699 relocation entry to initialize the value. This
3700 is done in the finish_dynamic_symbol routine. */
3705 bfd_put_32 (output_bfd
, relocation
,
3706 htab
->elf
.sgot
->contents
+ off
);
3711 unresolved_reloc
= FALSE
;
3715 if (local_got_offsets
== NULL
)
3718 off
= local_got_offsets
[r_symndx
];
3720 /* The offset must always be a multiple of 4. We use
3721 the least significant bit to record whether we have
3722 already generated the necessary reloc. */
3727 bfd_put_32 (output_bfd
, relocation
,
3728 htab
->elf
.sgot
->contents
+ off
);
3733 Elf_Internal_Rela outrel
;
3735 s
= htab
->elf
.srelgot
;
3739 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3740 + htab
->elf
.sgot
->output_offset
3742 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3743 elf_append_rel (output_bfd
, s
, &outrel
);
3746 local_got_offsets
[r_symndx
] |= 1;
3750 if (off
>= (bfd_vma
) -2)
3753 relocation
= htab
->elf
.sgot
->output_section
->vma
3754 + htab
->elf
.sgot
->output_offset
+ off
3755 - htab
->elf
.sgotplt
->output_section
->vma
3756 - htab
->elf
.sgotplt
->output_offset
;
3760 /* Relocation is relative to the start of the global offset
3763 /* Check to make sure it isn't a protected function or data
3764 symbol for shared library since it may not be local when
3765 used as function address or with copy relocation. We also
3766 need to make sure that a symbol is referenced locally. */
3767 if (!info
->executable
&& h
)
3769 if (!h
->def_regular
)
3773 switch (ELF_ST_VISIBILITY (h
->other
))
3776 v
= _("hidden symbol");
3779 v
= _("internal symbol");
3782 v
= _("protected symbol");
3789 (*_bfd_error_handler
)
3790 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3791 input_bfd
, v
, h
->root
.root
.string
);
3792 bfd_set_error (bfd_error_bad_value
);
3795 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
3796 && (h
->type
== STT_FUNC
3797 || h
->type
== STT_OBJECT
)
3798 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3800 (*_bfd_error_handler
)
3801 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3803 h
->type
== STT_FUNC
? "function" : "data",
3804 h
->root
.root
.string
);
3805 bfd_set_error (bfd_error_bad_value
);
3810 /* Note that sgot is not involved in this
3811 calculation. We always want the start of .got.plt. If we
3812 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3813 permitted by the ABI, we might have to change this
3815 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3816 + htab
->elf
.sgotplt
->output_offset
;
3820 /* Use global offset table as symbol value. */
3821 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3822 + htab
->elf
.sgotplt
->output_offset
;
3823 unresolved_reloc
= FALSE
;
3827 /* Relocation is to the entry for this symbol in the
3828 procedure linkage table. */
3830 /* Resolve a PLT32 reloc against a local symbol directly,
3831 without using the procedure linkage table. */
3835 eh
= (struct elf_i386_link_hash_entry
*) h
;
3836 if ((h
->plt
.offset
== (bfd_vma
) -1
3837 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3838 || htab
->elf
.splt
== NULL
)
3840 /* We didn't make a PLT entry for this symbol. This
3841 happens when statically linking PIC code, or when
3842 using -Bsymbolic. */
3846 if (h
->plt
.offset
!= (bfd_vma
) -1)
3848 resolved_plt
= htab
->elf
.splt
;
3849 plt_offset
= h
->plt
.offset
;
3853 resolved_plt
= htab
->plt_got
;
3854 plt_offset
= eh
->plt_got
.offset
;
3857 relocation
= (resolved_plt
->output_section
->vma
3858 + resolved_plt
->output_offset
3860 unresolved_reloc
= FALSE
;
3864 /* Set to symbol size. */
3865 relocation
= st_size
;
3870 if ((input_section
->flags
& SEC_ALLOC
) == 0
3876 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3877 || h
->root
.type
!= bfd_link_hash_undefweak
)
3878 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3879 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3880 || (ELIMINATE_COPY_RELOCS
3887 || h
->root
.type
== bfd_link_hash_undefweak
3888 || h
->root
.type
== bfd_link_hash_undefined
)))
3890 Elf_Internal_Rela outrel
;
3891 bfd_boolean skip
, relocate
;
3894 /* When generating a shared object, these relocations
3895 are copied into the output file to be resolved at run
3902 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3904 if (outrel
.r_offset
== (bfd_vma
) -1)
3906 else if (outrel
.r_offset
== (bfd_vma
) -2)
3907 skip
= TRUE
, relocate
= TRUE
;
3908 outrel
.r_offset
+= (input_section
->output_section
->vma
3909 + input_section
->output_offset
);
3912 memset (&outrel
, 0, sizeof outrel
);
3915 && (r_type
== R_386_PC32
3917 || !SYMBOLIC_BIND (info
, h
)
3918 || !h
->def_regular
))
3919 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3922 /* This symbol is local, or marked to become local. */
3924 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3927 sreloc
= elf_section_data (input_section
)->sreloc
;
3929 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3931 r
= bfd_reloc_notsupported
;
3932 goto check_relocation_error
;
3935 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3937 /* If this reloc is against an external symbol, we do
3938 not want to fiddle with the addend. Otherwise, we
3939 need to include the symbol value so that it becomes
3940 an addend for the dynamic reloc. */
3947 if (!info
->executable
)
3949 Elf_Internal_Rela outrel
;
3952 outrel
.r_offset
= rel
->r_offset
3953 + input_section
->output_section
->vma
3954 + input_section
->output_offset
;
3955 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3956 sreloc
= elf_section_data (input_section
)->sreloc
;
3959 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3964 case R_386_TLS_GOTDESC
:
3965 case R_386_TLS_DESC_CALL
:
3966 case R_386_TLS_IE_32
:
3967 case R_386_TLS_GOTIE
:
3968 tls_type
= GOT_UNKNOWN
;
3969 if (h
== NULL
&& local_got_offsets
)
3970 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3972 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3973 if (tls_type
== GOT_TLS_IE
)
3974 tls_type
= GOT_TLS_IE_NEG
;
3976 if (! elf_i386_tls_transition (info
, input_bfd
,
3977 input_section
, contents
,
3978 symtab_hdr
, sym_hashes
,
3979 &r_type
, tls_type
, rel
,
3980 relend
, h
, r_symndx
))
3983 if (r_type
== R_386_TLS_LE_32
)
3985 BFD_ASSERT (! unresolved_reloc
);
3986 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3991 /* GD->LE transition. */
3992 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3995 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3997 movl %gs:0, %eax; subl $foo@tpoff, %eax
3998 (6 byte form of subl). */
3999 memcpy (contents
+ rel
->r_offset
- 3,
4000 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4001 roff
= rel
->r_offset
+ 5;
4005 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4007 movl %gs:0, %eax; subl $foo@tpoff, %eax
4008 (6 byte form of subl). */
4009 memcpy (contents
+ rel
->r_offset
- 2,
4010 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4011 roff
= rel
->r_offset
+ 6;
4013 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4015 /* Skip R_386_PC32/R_386_PLT32. */
4019 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4021 /* GDesc -> LE transition.
4022 It's originally something like:
4023 leal x@tlsdesc(%ebx), %eax
4027 Registers other than %eax may be set up here. */
4032 roff
= rel
->r_offset
;
4033 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4035 /* Now modify the instruction as appropriate. */
4036 /* aoliva FIXME: remove the above and xor the byte
4038 bfd_put_8 (output_bfd
, val
^ 0x86,
4039 contents
+ roff
- 1);
4040 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4044 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4046 /* GDesc -> LE transition.
4054 roff
= rel
->r_offset
;
4055 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4056 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4059 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4063 /* IE->LE transition:
4064 Originally it can be one of:
4072 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4075 /* movl foo, %eax. */
4076 bfd_put_8 (output_bfd
, 0xb8,
4077 contents
+ rel
->r_offset
- 1);
4083 type
= bfd_get_8 (input_bfd
,
4084 contents
+ rel
->r_offset
- 2);
4089 bfd_put_8 (output_bfd
, 0xc7,
4090 contents
+ rel
->r_offset
- 2);
4091 bfd_put_8 (output_bfd
,
4092 0xc0 | ((val
>> 3) & 7),
4093 contents
+ rel
->r_offset
- 1);
4097 bfd_put_8 (output_bfd
, 0x81,
4098 contents
+ rel
->r_offset
- 2);
4099 bfd_put_8 (output_bfd
,
4100 0xc0 | ((val
>> 3) & 7),
4101 contents
+ rel
->r_offset
- 1);
4108 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4109 contents
+ rel
->r_offset
);
4114 unsigned int val
, type
;
4116 /* {IE_32,GOTIE}->LE transition:
4117 Originally it can be one of:
4118 subl foo(%reg1), %reg2
4119 movl foo(%reg1), %reg2
4120 addl foo(%reg1), %reg2
4123 movl $foo, %reg2 (6 byte form)
4124 addl $foo, %reg2. */
4125 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4126 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4130 bfd_put_8 (output_bfd
, 0xc7,
4131 contents
+ rel
->r_offset
- 2);
4132 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4133 contents
+ rel
->r_offset
- 1);
4135 else if (type
== 0x2b)
4138 bfd_put_8 (output_bfd
, 0x81,
4139 contents
+ rel
->r_offset
- 2);
4140 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4141 contents
+ rel
->r_offset
- 1);
4143 else if (type
== 0x03)
4146 bfd_put_8 (output_bfd
, 0x81,
4147 contents
+ rel
->r_offset
- 2);
4148 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4149 contents
+ rel
->r_offset
- 1);
4153 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4154 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4155 contents
+ rel
->r_offset
);
4157 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4158 contents
+ rel
->r_offset
);
4163 if (htab
->elf
.sgot
== NULL
)
4168 off
= h
->got
.offset
;
4169 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4173 if (local_got_offsets
== NULL
)
4176 off
= local_got_offsets
[r_symndx
];
4177 offplt
= local_tlsdesc_gotents
[r_symndx
];
4184 Elf_Internal_Rela outrel
;
4188 if (htab
->elf
.srelgot
== NULL
)
4191 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4193 if (GOT_TLS_GDESC_P (tls_type
))
4196 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4197 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4198 <= htab
->elf
.sgotplt
->size
);
4199 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4200 + htab
->elf
.sgotplt
->output_offset
4202 + htab
->sgotplt_jump_table_size
);
4203 sreloc
= htab
->elf
.srelplt
;
4204 loc
= sreloc
->contents
;
4205 loc
+= (htab
->next_tls_desc_index
++
4206 * sizeof (Elf32_External_Rel
));
4207 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4208 <= sreloc
->contents
+ sreloc
->size
);
4209 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4212 BFD_ASSERT (! unresolved_reloc
);
4213 bfd_put_32 (output_bfd
,
4214 relocation
- elf_i386_dtpoff_base (info
),
4215 htab
->elf
.sgotplt
->contents
+ offplt
4216 + htab
->sgotplt_jump_table_size
+ 4);
4220 bfd_put_32 (output_bfd
, 0,
4221 htab
->elf
.sgotplt
->contents
+ offplt
4222 + htab
->sgotplt_jump_table_size
+ 4);
4226 sreloc
= htab
->elf
.srelgot
;
4228 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4229 + htab
->elf
.sgot
->output_offset
+ off
);
4231 if (GOT_TLS_GD_P (tls_type
))
4232 dr_type
= R_386_TLS_DTPMOD32
;
4233 else if (GOT_TLS_GDESC_P (tls_type
))
4235 else if (tls_type
== GOT_TLS_IE_POS
)
4236 dr_type
= R_386_TLS_TPOFF
;
4238 dr_type
= R_386_TLS_TPOFF32
;
4240 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4241 bfd_put_32 (output_bfd
,
4242 relocation
- elf_i386_dtpoff_base (info
),
4243 htab
->elf
.sgot
->contents
+ off
);
4244 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4245 bfd_put_32 (output_bfd
,
4246 elf_i386_dtpoff_base (info
) - relocation
,
4247 htab
->elf
.sgot
->contents
+ off
);
4248 else if (dr_type
!= R_386_TLS_DESC
)
4249 bfd_put_32 (output_bfd
, 0,
4250 htab
->elf
.sgot
->contents
+ off
);
4251 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4253 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4255 if (GOT_TLS_GD_P (tls_type
))
4259 BFD_ASSERT (! unresolved_reloc
);
4260 bfd_put_32 (output_bfd
,
4261 relocation
- elf_i386_dtpoff_base (info
),
4262 htab
->elf
.sgot
->contents
+ off
+ 4);
4266 bfd_put_32 (output_bfd
, 0,
4267 htab
->elf
.sgot
->contents
+ off
+ 4);
4268 outrel
.r_info
= ELF32_R_INFO (indx
,
4269 R_386_TLS_DTPOFF32
);
4270 outrel
.r_offset
+= 4;
4271 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4274 else if (tls_type
== GOT_TLS_IE_BOTH
)
4276 bfd_put_32 (output_bfd
,
4278 ? relocation
- elf_i386_dtpoff_base (info
)
4280 htab
->elf
.sgot
->contents
+ off
+ 4);
4281 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4282 outrel
.r_offset
+= 4;
4283 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4290 local_got_offsets
[r_symndx
] |= 1;
4293 if (off
>= (bfd_vma
) -2
4294 && ! GOT_TLS_GDESC_P (tls_type
))
4296 if (r_type
== R_386_TLS_GOTDESC
4297 || r_type
== R_386_TLS_DESC_CALL
)
4299 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4300 unresolved_reloc
= FALSE
;
4302 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4304 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4305 + htab
->elf
.sgotplt
->output_offset
;
4306 relocation
= htab
->elf
.sgot
->output_section
->vma
4307 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4308 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4309 && tls_type
== GOT_TLS_IE_BOTH
)
4311 if (r_type
== R_386_TLS_IE
)
4312 relocation
+= g_o_t
;
4313 unresolved_reloc
= FALSE
;
4315 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4317 unsigned int val
, type
;
4320 /* GD->IE transition. */
4321 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4322 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4325 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4327 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4329 roff
= rel
->r_offset
- 3;
4333 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4335 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4336 roff
= rel
->r_offset
- 2;
4338 memcpy (contents
+ roff
,
4339 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4340 contents
[roff
+ 7] = 0x80 | (val
& 7);
4341 /* If foo is used only with foo@gotntpoff(%reg) and
4342 foo@indntpoff, but not with foo@gottpoff(%reg), change
4343 subl $foo@gottpoff(%reg), %eax
4345 addl $foo@gotntpoff(%reg), %eax. */
4346 if (tls_type
== GOT_TLS_IE_POS
)
4347 contents
[roff
+ 6] = 0x03;
4348 bfd_put_32 (output_bfd
,
4349 htab
->elf
.sgot
->output_section
->vma
4350 + htab
->elf
.sgot
->output_offset
+ off
4351 - htab
->elf
.sgotplt
->output_section
->vma
4352 - htab
->elf
.sgotplt
->output_offset
,
4353 contents
+ roff
+ 8);
4354 /* Skip R_386_PLT32. */
4358 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4360 /* GDesc -> IE transition.
4361 It's originally something like:
4362 leal x@tlsdesc(%ebx), %eax
4365 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4367 movl x@gottpoff(%ebx), %eax # before negl %eax
4369 Registers other than %eax may be set up here. */
4373 /* First, make sure it's a leal adding ebx to a 32-bit
4374 offset into any register, although it's probably
4375 almost always going to be eax. */
4376 roff
= rel
->r_offset
;
4378 /* Now modify the instruction as appropriate. */
4379 /* To turn a leal into a movl in the form we use it, it
4380 suffices to change the first byte from 0x8d to 0x8b.
4381 aoliva FIXME: should we decide to keep the leal, all
4382 we have to do is remove the statement below, and
4383 adjust the relaxation of R_386_TLS_DESC_CALL. */
4384 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4386 if (tls_type
== GOT_TLS_IE_BOTH
)
4389 bfd_put_32 (output_bfd
,
4390 htab
->elf
.sgot
->output_section
->vma
4391 + htab
->elf
.sgot
->output_offset
+ off
4392 - htab
->elf
.sgotplt
->output_section
->vma
4393 - htab
->elf
.sgotplt
->output_offset
,
4397 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4399 /* GDesc -> IE transition.
4407 depending on how we transformed the TLS_GOTDESC above.
4412 roff
= rel
->r_offset
;
4414 /* Now modify the instruction as appropriate. */
4415 if (tls_type
!= GOT_TLS_IE_NEG
)
4418 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4419 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4424 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4425 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4435 if (! elf_i386_tls_transition (info
, input_bfd
,
4436 input_section
, contents
,
4437 symtab_hdr
, sym_hashes
,
4438 &r_type
, GOT_UNKNOWN
, rel
,
4439 relend
, h
, r_symndx
))
4442 if (r_type
!= R_386_TLS_LDM
)
4444 /* LD->LE transition:
4445 leal foo(%reg), %eax; call ___tls_get_addr.
4447 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4448 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4449 memcpy (contents
+ rel
->r_offset
- 2,
4450 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4451 /* Skip R_386_PC32/R_386_PLT32. */
4456 if (htab
->elf
.sgot
== NULL
)
4459 off
= htab
->tls_ldm_got
.offset
;
4464 Elf_Internal_Rela outrel
;
4466 if (htab
->elf
.srelgot
== NULL
)
4469 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4470 + htab
->elf
.sgot
->output_offset
+ off
);
4472 bfd_put_32 (output_bfd
, 0,
4473 htab
->elf
.sgot
->contents
+ off
);
4474 bfd_put_32 (output_bfd
, 0,
4475 htab
->elf
.sgot
->contents
+ off
+ 4);
4476 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4477 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4478 htab
->tls_ldm_got
.offset
|= 1;
4480 relocation
= htab
->elf
.sgot
->output_section
->vma
4481 + htab
->elf
.sgot
->output_offset
+ off
4482 - htab
->elf
.sgotplt
->output_section
->vma
4483 - htab
->elf
.sgotplt
->output_offset
;
4484 unresolved_reloc
= FALSE
;
4487 case R_386_TLS_LDO_32
:
4488 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4489 relocation
-= elf_i386_dtpoff_base (info
);
4491 /* When converting LDO to LE, we must negate. */
4492 relocation
= -elf_i386_tpoff (info
, relocation
);
4495 case R_386_TLS_LE_32
:
4497 if (!info
->executable
)
4499 Elf_Internal_Rela outrel
;
4502 outrel
.r_offset
= rel
->r_offset
4503 + input_section
->output_section
->vma
4504 + input_section
->output_offset
;
4505 if (h
!= NULL
&& h
->dynindx
!= -1)
4509 if (r_type
== R_386_TLS_LE_32
)
4510 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4512 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4513 sreloc
= elf_section_data (input_section
)->sreloc
;
4516 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4519 else if (r_type
== R_386_TLS_LE_32
)
4520 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4522 relocation
-= elf_i386_dtpoff_base (info
);
4524 else if (r_type
== R_386_TLS_LE_32
)
4525 relocation
= elf_i386_tpoff (info
, relocation
);
4527 relocation
= -elf_i386_tpoff (info
, relocation
);
4534 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4535 because such sections are not SEC_ALLOC and thus ld.so will
4536 not process them. */
4537 if (unresolved_reloc
4538 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4540 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4541 rel
->r_offset
) != (bfd_vma
) -1)
4543 (*_bfd_error_handler
)
4544 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4547 (long) rel
->r_offset
,
4549 h
->root
.root
.string
);
4554 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4555 contents
, rel
->r_offset
,
4558 check_relocation_error
:
4559 if (r
!= bfd_reloc_ok
)
4564 name
= h
->root
.root
.string
;
4567 name
= bfd_elf_string_from_elf_section (input_bfd
,
4568 symtab_hdr
->sh_link
,
4573 name
= bfd_section_name (input_bfd
, sec
);
4576 if (r
== bfd_reloc_overflow
)
4578 if (! ((*info
->callbacks
->reloc_overflow
)
4579 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4580 (bfd_vma
) 0, input_bfd
, input_section
,
4586 (*_bfd_error_handler
)
4587 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4588 input_bfd
, input_section
,
4589 (long) rel
->r_offset
, name
, (int) r
);
4598 /* Finish up dynamic symbol handling. We set the contents of various
4599 dynamic sections here. */
4602 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4603 struct bfd_link_info
*info
,
4604 struct elf_link_hash_entry
*h
,
4605 Elf_Internal_Sym
*sym
)
4607 struct elf_i386_link_hash_table
*htab
;
4608 unsigned plt_entry_size
;
4609 const struct elf_i386_backend_data
*abed
;
4610 struct elf_i386_link_hash_entry
*eh
;
4612 htab
= elf_i386_hash_table (info
);
4616 abed
= get_elf_i386_backend_data (output_bfd
);
4617 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4619 eh
= (struct elf_i386_link_hash_entry
*) h
;
4621 if (h
->plt
.offset
!= (bfd_vma
) -1)
4625 Elf_Internal_Rela rel
;
4627 asection
*plt
, *gotplt
, *relplt
;
4629 /* When building a static executable, use .iplt, .igot.plt and
4630 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4631 if (htab
->elf
.splt
!= NULL
)
4633 plt
= htab
->elf
.splt
;
4634 gotplt
= htab
->elf
.sgotplt
;
4635 relplt
= htab
->elf
.srelplt
;
4639 plt
= htab
->elf
.iplt
;
4640 gotplt
= htab
->elf
.igotplt
;
4641 relplt
= htab
->elf
.irelplt
;
4644 /* This symbol has an entry in the procedure linkage table. Set
4647 if ((h
->dynindx
== -1
4648 && !((h
->forced_local
|| info
->executable
)
4650 && h
->type
== STT_GNU_IFUNC
))
4656 /* Get the index in the procedure linkage table which
4657 corresponds to this symbol. This is the index of this symbol
4658 in all the symbols for which we are making plt entries. The
4659 first entry in the procedure linkage table is reserved.
4661 Get the offset into the .got table of the entry that
4662 corresponds to this function. Each .got entry is 4 bytes.
4663 The first three are reserved.
4665 For static executables, we don't reserve anything. */
4667 if (plt
== htab
->elf
.splt
)
4669 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4670 got_offset
= (got_offset
+ 3) * 4;
4674 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4675 got_offset
= got_offset
* 4;
4678 /* Fill in the entry in the procedure linkage table. */
4681 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4682 abed
->plt
->plt_entry_size
);
4683 bfd_put_32 (output_bfd
,
4684 (gotplt
->output_section
->vma
4685 + gotplt
->output_offset
4687 plt
->contents
+ h
->plt
.offset
4688 + abed
->plt
->plt_got_offset
);
4690 if (abed
->is_vxworks
)
4692 int s
, k
, reloc_index
;
4694 /* Create the R_386_32 relocation referencing the GOT
4695 for this PLT entry. */
4697 /* S: Current slot number (zero-based). */
4698 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4699 / abed
->plt
->plt_entry_size
);
4700 /* K: Number of relocations for PLTResolve. */
4702 k
= PLTRESOLVE_RELOCS_SHLIB
;
4704 k
= PLTRESOLVE_RELOCS
;
4705 /* Skip the PLTresolve relocations, and the relocations for
4706 the other PLT slots. */
4707 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4708 loc
= (htab
->srelplt2
->contents
+ reloc_index
4709 * sizeof (Elf32_External_Rel
));
4711 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4712 + htab
->elf
.splt
->output_offset
4713 + h
->plt
.offset
+ 2),
4714 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4715 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4717 /* Create the R_386_32 relocation referencing the beginning of
4718 the PLT for this GOT entry. */
4719 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4720 + htab
->elf
.sgotplt
->output_offset
4722 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4723 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4724 loc
+ sizeof (Elf32_External_Rel
));
4729 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4730 abed
->plt
->plt_entry_size
);
4731 bfd_put_32 (output_bfd
, got_offset
,
4732 plt
->contents
+ h
->plt
.offset
4733 + abed
->plt
->plt_got_offset
);
4736 /* Fill in the entry in the global offset table. */
4737 bfd_put_32 (output_bfd
,
4738 (plt
->output_section
->vma
4739 + plt
->output_offset
4741 + abed
->plt
->plt_lazy_offset
),
4742 gotplt
->contents
+ got_offset
);
4744 /* Fill in the entry in the .rel.plt section. */
4745 rel
.r_offset
= (gotplt
->output_section
->vma
4746 + gotplt
->output_offset
4748 if (h
->dynindx
== -1
4749 || ((info
->executable
4750 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4752 && h
->type
== STT_GNU_IFUNC
))
4754 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4755 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4756 in the .got.plt section. */
4757 bfd_put_32 (output_bfd
,
4758 (h
->root
.u
.def
.value
4759 + h
->root
.u
.def
.section
->output_section
->vma
4760 + h
->root
.u
.def
.section
->output_offset
),
4761 gotplt
->contents
+ got_offset
);
4762 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4763 /* R_386_IRELATIVE comes last. */
4764 plt_index
= htab
->next_irelative_index
--;
4768 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4769 plt_index
= htab
->next_jump_slot_index
++;
4771 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4772 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4774 /* Don't fill PLT entry for static executables. */
4775 if (plt
== htab
->elf
.splt
)
4777 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4778 plt
->contents
+ h
->plt
.offset
4779 + abed
->plt
->plt_reloc_offset
);
4780 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4781 + abed
->plt
->plt_plt_offset
+ 4),
4782 plt
->contents
+ h
->plt
.offset
4783 + abed
->plt
->plt_plt_offset
);
4786 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4788 bfd_vma got_offset
, plt_offset
;
4789 asection
*plt
, *got
, *gotplt
;
4790 const bfd_byte
*got_plt_entry
;
4792 /* Offset of displacement of the indirect jump. */
4793 bfd_vma plt_got_offset
= 2;
4795 /* Set the entry in the GOT procedure linkage table. */
4796 plt
= htab
->plt_got
;
4797 got
= htab
->elf
.sgot
;
4798 gotplt
= htab
->elf
.sgotplt
;
4799 got_offset
= h
->got
.offset
;
4801 if (got_offset
== (bfd_vma
) -1
4807 /* Fill in the entry in the GOT procedure linkage table. */
4810 got_plt_entry
= elf_i386_got_plt_entry
;
4811 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4815 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4816 got_offset
+= (got
->output_section
->vma
4817 + got
->output_offset
4818 - gotplt
->output_section
->vma
4819 - gotplt
->output_offset
);
4822 plt_offset
= eh
->plt_got
.offset
;
4823 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4824 sizeof (elf_i386_got_plt_entry
));
4825 bfd_put_32 (output_bfd
, got_offset
,
4826 plt
->contents
+ plt_offset
+ plt_got_offset
);
4830 && (h
->plt
.offset
!= (bfd_vma
) -1
4831 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4833 /* Mark the symbol as undefined, rather than as defined in
4834 the .plt section. Leave the value if there were any
4835 relocations where pointer equality matters (this is a clue
4836 for the dynamic linker, to make function pointer
4837 comparisons work between an application and shared
4838 library), otherwise set it to zero. If a function is only
4839 called from a binary, there is no need to slow down
4840 shared libraries because of that. */
4841 sym
->st_shndx
= SHN_UNDEF
;
4842 if (!h
->pointer_equality_needed
)
4846 if (h
->got
.offset
!= (bfd_vma
) -1
4847 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4848 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4850 Elf_Internal_Rela rel
;
4852 /* This symbol has an entry in the global offset table. Set it
4855 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4858 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4859 + htab
->elf
.sgot
->output_offset
4860 + (h
->got
.offset
& ~(bfd_vma
) 1));
4862 /* If this is a static link, or it is a -Bsymbolic link and the
4863 symbol is defined locally or was forced to be local because
4864 of a version file, we just want to emit a RELATIVE reloc.
4865 The entry in the global offset table will already have been
4866 initialized in the relocate_section function. */
4868 && h
->type
== STT_GNU_IFUNC
)
4872 /* Generate R_386_GLOB_DAT. */
4879 if (!h
->pointer_equality_needed
)
4882 /* For non-shared object, we can't use .got.plt, which
4883 contains the real function addres if we need pointer
4884 equality. We load the GOT entry with the PLT entry. */
4885 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4886 bfd_put_32 (output_bfd
,
4887 (plt
->output_section
->vma
4888 + plt
->output_offset
+ h
->plt
.offset
),
4889 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4893 else if (info
->shared
4894 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4896 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4897 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4901 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4903 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4904 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4905 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4908 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4913 Elf_Internal_Rela rel
;
4915 /* This symbol needs a copy reloc. Set it up. */
4917 if (h
->dynindx
== -1
4918 || (h
->root
.type
!= bfd_link_hash_defined
4919 && h
->root
.type
!= bfd_link_hash_defweak
)
4920 || htab
->srelbss
== NULL
)
4923 rel
.r_offset
= (h
->root
.u
.def
.value
4924 + h
->root
.u
.def
.section
->output_section
->vma
4925 + h
->root
.u
.def
.section
->output_offset
);
4926 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4927 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4933 /* Finish up local dynamic symbol handling. We set the contents of
4934 various dynamic sections here. */
4937 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4939 struct elf_link_hash_entry
*h
4940 = (struct elf_link_hash_entry
*) *slot
;
4941 struct bfd_link_info
*info
4942 = (struct bfd_link_info
*) inf
;
4944 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4948 /* Used to decide how to sort relocs in an optimal manner for the
4949 dynamic linker, before writing them out. */
4951 static enum elf_reloc_type_class
4952 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4953 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4954 const Elf_Internal_Rela
*rela
)
4956 switch (ELF32_R_TYPE (rela
->r_info
))
4958 case R_386_RELATIVE
:
4959 return reloc_class_relative
;
4960 case R_386_JUMP_SLOT
:
4961 return reloc_class_plt
;
4963 return reloc_class_copy
;
4965 return reloc_class_normal
;
4969 /* Finish up the dynamic sections. */
4972 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4973 struct bfd_link_info
*info
)
4975 struct elf_i386_link_hash_table
*htab
;
4978 const struct elf_i386_backend_data
*abed
;
4980 htab
= elf_i386_hash_table (info
);
4984 dynobj
= htab
->elf
.dynobj
;
4985 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4986 abed
= get_elf_i386_backend_data (output_bfd
);
4988 if (htab
->elf
.dynamic_sections_created
)
4990 Elf32_External_Dyn
*dyncon
, *dynconend
;
4992 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4995 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4996 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4997 for (; dyncon
< dynconend
; dyncon
++)
4999 Elf_Internal_Dyn dyn
;
5002 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5007 if (abed
->is_vxworks
5008 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5013 s
= htab
->elf
.sgotplt
;
5014 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5018 s
= htab
->elf
.srelplt
;
5019 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5023 s
= htab
->elf
.srelplt
;
5024 dyn
.d_un
.d_val
= s
->size
;
5028 /* My reading of the SVR4 ABI indicates that the
5029 procedure linkage table relocs (DT_JMPREL) should be
5030 included in the overall relocs (DT_REL). This is
5031 what Solaris does. However, UnixWare can not handle
5032 that case. Therefore, we override the DT_RELSZ entry
5033 here to make it not include the JMPREL relocs. */
5034 s
= htab
->elf
.srelplt
;
5037 dyn
.d_un
.d_val
-= s
->size
;
5041 /* We may not be using the standard ELF linker script.
5042 If .rel.plt is the first .rel section, we adjust
5043 DT_REL to not include it. */
5044 s
= htab
->elf
.srelplt
;
5047 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5049 dyn
.d_un
.d_ptr
+= s
->size
;
5053 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5056 /* Fill in the first entry in the procedure linkage table. */
5057 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5061 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5062 abed
->plt
->plt0_entry_size
);
5063 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5064 abed
->plt0_pad_byte
,
5065 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5069 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->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
);
5074 bfd_put_32 (output_bfd
,
5075 (htab
->elf
.sgotplt
->output_section
->vma
5076 + htab
->elf
.sgotplt
->output_offset
5078 htab
->elf
.splt
->contents
5079 + abed
->plt
->plt0_got1_offset
);
5080 bfd_put_32 (output_bfd
,
5081 (htab
->elf
.sgotplt
->output_section
->vma
5082 + htab
->elf
.sgotplt
->output_offset
5084 htab
->elf
.splt
->contents
5085 + abed
->plt
->plt0_got2_offset
);
5087 if (abed
->is_vxworks
)
5089 Elf_Internal_Rela rel
;
5091 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5092 On IA32 we use REL relocations so the addend goes in
5093 the PLT directly. */
5094 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5095 + htab
->elf
.splt
->output_offset
5096 + abed
->plt
->plt0_got1_offset
);
5097 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5098 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5099 htab
->srelplt2
->contents
);
5100 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5101 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5102 + htab
->elf
.splt
->output_offset
5103 + abed
->plt
->plt0_got2_offset
);
5104 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5105 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5106 htab
->srelplt2
->contents
+
5107 sizeof (Elf32_External_Rel
));
5111 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5112 really seem like the right value. */
5113 elf_section_data (htab
->elf
.splt
->output_section
)
5114 ->this_hdr
.sh_entsize
= 4;
5116 /* Correct the .rel.plt.unloaded relocations. */
5117 if (abed
->is_vxworks
&& !info
->shared
)
5119 int num_plts
= (htab
->elf
.splt
->size
5120 / abed
->plt
->plt_entry_size
) - 1;
5123 p
= htab
->srelplt2
->contents
;
5125 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5127 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5129 for (; num_plts
; num_plts
--)
5131 Elf_Internal_Rela rel
;
5132 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5133 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5134 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5135 p
+= sizeof (Elf32_External_Rel
);
5137 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5138 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5139 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5140 p
+= sizeof (Elf32_External_Rel
);
5146 if (htab
->elf
.sgotplt
)
5148 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5150 (*_bfd_error_handler
)
5151 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5155 /* Fill in the first three entries in the global offset table. */
5156 if (htab
->elf
.sgotplt
->size
> 0)
5158 bfd_put_32 (output_bfd
,
5160 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5161 htab
->elf
.sgotplt
->contents
);
5162 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5163 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5166 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5169 /* Adjust .eh_frame for .plt section. */
5170 if (htab
->plt_eh_frame
!= NULL
5171 && htab
->plt_eh_frame
->contents
!= NULL
)
5173 if (htab
->elf
.splt
!= NULL
5174 && htab
->elf
.splt
->size
!= 0
5175 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5176 && htab
->elf
.splt
->output_section
!= NULL
5177 && htab
->plt_eh_frame
->output_section
!= NULL
)
5179 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5180 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5181 + htab
->plt_eh_frame
->output_offset
5182 + PLT_FDE_START_OFFSET
;
5183 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5184 htab
->plt_eh_frame
->contents
5185 + PLT_FDE_START_OFFSET
);
5187 if (htab
->plt_eh_frame
->sec_info_type
5188 == SEC_INFO_TYPE_EH_FRAME
)
5190 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5192 htab
->plt_eh_frame
->contents
))
5197 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5198 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5200 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5201 htab_traverse (htab
->loc_hash_table
,
5202 elf_i386_finish_local_dynamic_symbol
,
5208 /* Return an array of PLT entry symbol values. */
5211 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5214 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5217 bfd_vma
*plt_sym_val
;
5219 bfd_byte
*plt_contents
;
5220 const struct elf_i386_backend_data
*bed
5221 = get_elf_i386_backend_data (abfd
);
5222 Elf_Internal_Shdr
*hdr
;
5224 /* Get the .plt section contents. */
5225 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5226 if (plt_contents
== NULL
)
5228 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5229 plt_contents
, 0, plt
->size
))
5232 free (plt_contents
);
5236 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5237 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5240 hdr
= &elf_section_data (relplt
)->this_hdr
;
5241 count
= relplt
->size
/ hdr
->sh_entsize
;
5243 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5244 if (plt_sym_val
== NULL
)
5247 for (i
= 0; i
< count
; i
++)
5248 plt_sym_val
[i
] = -1;
5250 plt_offset
= bed
->plt
->plt_entry_size
;
5251 p
= relplt
->relocation
;
5252 for (i
= 0; i
< count
; i
++, p
++)
5256 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5257 if (p
->howto
== NULL
)
5260 if (p
->howto
->type
!= R_386_JUMP_SLOT
5261 && p
->howto
->type
!= R_386_IRELATIVE
)
5264 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5265 + bed
->plt
->plt_reloc_offset
));
5266 reloc_index
/= sizeof (Elf32_External_Rel
);
5267 if (reloc_index
>= count
)
5269 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5270 plt_offset
+= bed
->plt
->plt_entry_size
;
5272 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5274 if (plt_offset
>= plt
->size
)
5278 free (plt_contents
);
5283 /* Similar to _bfd_elf_get_synthetic_symtab. */
5286 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5293 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5294 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5295 dynsymcount
, dynsyms
, ret
,
5297 elf_i386_get_plt_sym_val
);
5300 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5303 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5305 if (h
->plt
.offset
!= (bfd_vma
) -1
5307 && !h
->pointer_equality_needed
)
5310 return _bfd_elf_hash_symbol (h
);
5313 /* Hook called by the linker routine which adds symbols from an object
5317 elf_i386_add_symbol_hook (bfd
* abfd
,
5318 struct bfd_link_info
* info
,
5319 Elf_Internal_Sym
* sym
,
5320 const char ** namep ATTRIBUTE_UNUSED
,
5321 flagword
* flagsp ATTRIBUTE_UNUSED
,
5322 asection
** secp ATTRIBUTE_UNUSED
,
5323 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5325 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5326 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5327 && (abfd
->flags
& DYNAMIC
) == 0
5328 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5329 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5334 #define TARGET_LITTLE_SYM i386_elf32_vec
5335 #define TARGET_LITTLE_NAME "elf32-i386"
5336 #define ELF_ARCH bfd_arch_i386
5337 #define ELF_TARGET_ID I386_ELF_DATA
5338 #define ELF_MACHINE_CODE EM_386
5339 #define ELF_MAXPAGESIZE 0x1000
5341 #define elf_backend_can_gc_sections 1
5342 #define elf_backend_can_refcount 1
5343 #define elf_backend_want_got_plt 1
5344 #define elf_backend_plt_readonly 1
5345 #define elf_backend_want_plt_sym 0
5346 #define elf_backend_got_header_size 12
5347 #define elf_backend_plt_alignment 4
5348 #define elf_backend_extern_protected_data 1
5350 /* Support RELA for objdump of prelink objects. */
5351 #define elf_info_to_howto elf_i386_info_to_howto_rel
5352 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5354 #define bfd_elf32_mkobject elf_i386_mkobject
5356 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5357 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5358 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5359 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5360 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5362 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5363 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5364 #define elf_backend_check_relocs elf_i386_check_relocs
5365 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5366 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5367 #define elf_backend_fake_sections elf_i386_fake_sections
5368 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5369 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5370 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5371 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5372 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5373 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5374 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5375 #define elf_backend_relocate_section elf_i386_relocate_section
5376 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5377 #define elf_backend_always_size_sections elf_i386_always_size_sections
5378 #define elf_backend_omit_section_dynsym \
5379 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5380 #define elf_backend_hash_symbol elf_i386_hash_symbol
5381 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5383 #include "elf32-target.h"
5385 /* FreeBSD support. */
5387 #undef TARGET_LITTLE_SYM
5388 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5389 #undef TARGET_LITTLE_NAME
5390 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5392 #define ELF_OSABI ELFOSABI_FREEBSD
5394 /* The kernel recognizes executables as valid only if they carry a
5395 "FreeBSD" label in the ELF header. So we put this label on all
5396 executables and (for simplicity) also all other object files. */
5399 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5401 _bfd_elf_post_process_headers (abfd
, info
);
5403 #ifdef OLD_FREEBSD_ABI_LABEL
5405 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5406 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5407 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5412 #undef elf_backend_post_process_headers
5413 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5415 #define elf32_bed elf32_i386_fbsd_bed
5417 #undef elf_backend_add_symbol_hook
5419 #include "elf32-target.h"
5423 #undef TARGET_LITTLE_SYM
5424 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5425 #undef TARGET_LITTLE_NAME
5426 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5428 #undef elf_backend_post_process_headers
5430 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5431 objects won't be recognized. */
5435 #define elf32_bed elf32_i386_sol2_bed
5437 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5439 #undef elf_backend_static_tls_alignment
5440 #define elf_backend_static_tls_alignment 8
5442 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5444 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5446 #undef elf_backend_want_plt_sym
5447 #define elf_backend_want_plt_sym 1
5449 #include "elf32-target.h"
5451 /* Intel MCU support. */
5454 elf32_iamcu_elf_object_p (bfd
*abfd
)
5456 /* Set the right machine number for an IAMCU elf32 file. */
5457 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
5461 #undef TARGET_LITTLE_SYM
5462 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5463 #undef TARGET_LITTLE_NAME
5464 #define TARGET_LITTLE_NAME "elf32-iamcu"
5466 #define ELF_ARCH bfd_arch_iamcu
5468 #undef ELF_MACHINE_CODE
5469 #define ELF_MACHINE_CODE EM_IAMCU
5474 #define elf32_bed elf32_iamcu_bed
5476 #undef elf_backend_object_p
5477 #define elf_backend_object_p elf32_iamcu_elf_object_p
5479 #undef elf_backend_static_tls_alignment
5481 #undef elf_backend_want_plt_sym
5482 #define elf_backend_want_plt_sym 0
5484 #include "elf32-target.h"
5486 /* Restore defaults. */
5488 #define ELF_ARCH bfd_arch_i386
5489 #undef ELF_MACHINE_CODE
5490 #define ELF_MACHINE_CODE EM_386
5492 /* Native Client support. */
5494 #undef TARGET_LITTLE_SYM
5495 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5496 #undef TARGET_LITTLE_NAME
5497 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5499 #define elf32_bed elf32_i386_nacl_bed
5501 #undef ELF_MAXPAGESIZE
5502 #define ELF_MAXPAGESIZE 0x10000
5504 /* Restore defaults. */
5506 #undef elf_backend_want_plt_sym
5507 #define elf_backend_want_plt_sym 0
5508 #undef elf_backend_post_process_headers
5509 #undef elf_backend_static_tls_alignment
5511 /* NaCl uses substantially different PLT entries for the same effects. */
5513 #undef elf_backend_plt_alignment
5514 #define elf_backend_plt_alignment 5
5515 #define NACL_PLT_ENTRY_SIZE 64
5516 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5518 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5520 0xff, 0x35, /* pushl contents of address */
5521 0, 0, 0, 0, /* replaced with address of .got + 4. */
5522 0x8b, 0x0d, /* movl contents of address, %ecx */
5523 0, 0, 0, 0, /* replaced with address of .got + 8. */
5524 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5525 0xff, 0xe1 /* jmp *%ecx */
5528 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5530 0x8b, 0x0d, /* movl contents of address, %ecx */
5531 0, 0, 0, 0, /* replaced with GOT slot address. */
5532 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5533 0xff, 0xe1, /* jmp *%ecx */
5535 /* Pad to the next 32-byte boundary with nop instructions. */
5537 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5538 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5540 /* Lazy GOT entries point here (32-byte aligned). */
5541 0x68, /* pushl immediate */
5542 0, 0, 0, 0, /* replaced with reloc offset. */
5543 0xe9, /* jmp relative */
5544 0, 0, 0, 0, /* replaced with offset to .plt. */
5546 /* Pad to the next 32-byte boundary with nop instructions. */
5547 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5548 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5552 static const bfd_byte
5553 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5555 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5556 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5557 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5558 0xff, 0xe1, /* jmp *%ecx */
5560 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5561 so pad to that size with nop instructions. */
5562 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5565 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5567 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5568 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5569 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5570 0xff, 0xe1, /* jmp *%ecx */
5572 /* Pad to the next 32-byte boundary with nop instructions. */
5574 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5575 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5577 /* Lazy GOT entries point here (32-byte aligned). */
5578 0x68, /* pushl immediate */
5579 0, 0, 0, 0, /* replaced with offset into relocation table. */
5580 0xe9, /* jmp relative */
5581 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5583 /* Pad to the next 32-byte boundary with nop instructions. */
5584 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5585 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5589 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5591 #if (PLT_CIE_LENGTH != 20 \
5592 || PLT_FDE_LENGTH != 36 \
5593 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5594 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5595 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5597 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5598 0, 0, 0, 0, /* CIE ID */
5599 1, /* CIE version */
5600 'z', 'R', 0, /* Augmentation string */
5601 1, /* Code alignment factor */
5602 0x7c, /* Data alignment factor: -4 */
5603 8, /* Return address column */
5604 1, /* Augmentation size */
5605 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5606 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5607 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5608 DW_CFA_nop
, DW_CFA_nop
,
5610 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5611 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5612 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5613 0, 0, 0, 0, /* .plt size goes here */
5614 0, /* Augmentation size */
5615 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5616 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5617 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5618 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5619 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5620 13, /* Block length */
5621 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5622 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5623 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5624 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5625 DW_CFA_nop
, DW_CFA_nop
5628 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5630 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5631 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5632 2, /* plt0_got1_offset */
5633 8, /* plt0_got2_offset */
5634 elf_i386_nacl_plt_entry
, /* plt_entry */
5635 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5636 2, /* plt_got_offset */
5637 33, /* plt_reloc_offset */
5638 38, /* plt_plt_offset */
5639 32, /* plt_lazy_offset */
5640 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5641 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5642 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5643 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5646 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5648 &elf_i386_nacl_plt
, /* plt */
5649 0x90, /* plt0_pad_byte: nop insn */
5654 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5656 /* Set the right machine number for a NaCl i386 ELF32 file. */
5657 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5661 #undef elf_backend_arch_data
5662 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5664 #undef elf_backend_object_p
5665 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5666 #undef elf_backend_modify_segment_map
5667 #define elf_backend_modify_segment_map nacl_modify_segment_map
5668 #undef elf_backend_modify_program_headers
5669 #define elf_backend_modify_program_headers nacl_modify_program_headers
5670 #undef elf_backend_final_write_processing
5671 #define elf_backend_final_write_processing nacl_final_write_processing
5673 #include "elf32-target.h"
5675 /* Restore defaults. */
5676 #undef elf_backend_object_p
5677 #undef elf_backend_modify_segment_map
5678 #undef elf_backend_modify_program_headers
5679 #undef elf_backend_final_write_processing
5681 /* VxWorks support. */
5683 #undef TARGET_LITTLE_SYM
5684 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5685 #undef TARGET_LITTLE_NAME
5686 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5688 #undef elf_backend_plt_alignment
5689 #define elf_backend_plt_alignment 4
5691 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5693 &elf_i386_plt
, /* plt */
5694 0x90, /* plt0_pad_byte */
5698 #undef elf_backend_arch_data
5699 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5701 #undef elf_backend_relocs_compatible
5702 #undef elf_backend_add_symbol_hook
5703 #define elf_backend_add_symbol_hook \
5704 elf_vxworks_add_symbol_hook
5705 #undef elf_backend_link_output_symbol_hook
5706 #define elf_backend_link_output_symbol_hook \
5707 elf_vxworks_link_output_symbol_hook
5708 #undef elf_backend_emit_relocs
5709 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5710 #undef elf_backend_final_write_processing
5711 #define elf_backend_final_write_processing \
5712 elf_vxworks_final_write_processing
5713 #undef elf_backend_static_tls_alignment
5715 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5717 #undef elf_backend_want_plt_sym
5718 #define elf_backend_want_plt_sym 1
5721 #define elf32_bed elf32_i386_vxworks_bed
5723 #include "elf32-target.h"