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;
1580 if (h
->type
== STT_GNU_IFUNC
)
1581 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1582 |= elf_gnu_symbol_ifunc
;
1585 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1586 symtab_hdr
, sym_hashes
,
1587 &r_type
, GOT_UNKNOWN
,
1588 rel
, rel_end
, h
, r_symndx
))
1594 htab
->tls_ldm_got
.refcount
+= 1;
1598 /* This symbol requires a procedure linkage table entry. We
1599 actually build the entry in adjust_dynamic_symbol,
1600 because this might be a case of linking PIC code which is
1601 never referenced by a dynamic object, in which case we
1602 don't need to generate a procedure linkage table entry
1605 /* If this is a local symbol, we resolve it directly without
1606 creating a procedure linkage table entry. */
1611 h
->plt
.refcount
+= 1;
1618 case R_386_TLS_IE_32
:
1620 case R_386_TLS_GOTIE
:
1621 if (!info
->executable
)
1622 info
->flags
|= DF_STATIC_TLS
;
1627 case R_386_TLS_GOTDESC
:
1628 case R_386_TLS_DESC_CALL
:
1629 /* This symbol requires a global offset table entry. */
1631 int tls_type
, old_tls_type
;
1636 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1637 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1638 case R_386_TLS_GOTDESC
:
1639 case R_386_TLS_DESC_CALL
:
1640 tls_type
= GOT_TLS_GDESC
; break;
1641 case R_386_TLS_IE_32
:
1642 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1643 tls_type
= GOT_TLS_IE_NEG
;
1645 /* If this is a GD->IE transition, we may use either of
1646 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1647 tls_type
= GOT_TLS_IE
;
1650 case R_386_TLS_GOTIE
:
1651 tls_type
= GOT_TLS_IE_POS
; break;
1656 h
->got
.refcount
+= 1;
1657 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1661 bfd_signed_vma
*local_got_refcounts
;
1663 /* This is a global offset table entry for a local symbol. */
1664 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1665 if (local_got_refcounts
== NULL
)
1669 size
= symtab_hdr
->sh_info
;
1670 size
*= (sizeof (bfd_signed_vma
)
1671 + sizeof (bfd_vma
) + sizeof(char));
1672 local_got_refcounts
= (bfd_signed_vma
*)
1673 bfd_zalloc (abfd
, size
);
1674 if (local_got_refcounts
== NULL
)
1676 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1677 elf_i386_local_tlsdesc_gotent (abfd
)
1678 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1679 elf_i386_local_got_tls_type (abfd
)
1680 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1682 local_got_refcounts
[r_symndx
] += 1;
1683 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1686 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1687 tls_type
|= old_tls_type
;
1688 /* If a TLS symbol is accessed using IE at least once,
1689 there is no point to use dynamic model for it. */
1690 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1691 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1692 || (tls_type
& GOT_TLS_IE
) == 0))
1694 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1695 tls_type
= old_tls_type
;
1696 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1697 && GOT_TLS_GD_ANY_P (tls_type
))
1698 tls_type
|= old_tls_type
;
1702 name
= h
->root
.root
.string
;
1704 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1706 (*_bfd_error_handler
)
1707 (_("%B: `%s' accessed both as normal and "
1708 "thread local symbol"),
1710 bfd_set_error (bfd_error_bad_value
);
1715 if (old_tls_type
!= tls_type
)
1718 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1720 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1728 if (htab
->elf
.sgot
== NULL
)
1730 if (htab
->elf
.dynobj
== NULL
)
1731 htab
->elf
.dynobj
= abfd
;
1732 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1735 if (r_type
!= R_386_TLS_IE
)
1739 case R_386_TLS_LE_32
:
1741 if (info
->executable
)
1743 info
->flags
|= DF_STATIC_TLS
;
1748 if (h
!= NULL
&& info
->executable
)
1750 /* If this reloc is in a read-only section, we might
1751 need a copy reloc. We can't check reliably at this
1752 stage whether the section is read-only, as input
1753 sections have not yet been mapped to output sections.
1754 Tentatively set the flag for now, and correct in
1755 adjust_dynamic_symbol. */
1758 /* We may need a .plt entry if the function this reloc
1759 refers to is in a shared lib. */
1760 h
->plt
.refcount
+= 1;
1761 if (r_type
!= R_386_PC32
)
1762 h
->pointer_equality_needed
= 1;
1767 /* If we are creating a shared library, and this is a reloc
1768 against a global symbol, or a non PC relative reloc
1769 against a local symbol, then we need to copy the reloc
1770 into the shared library. However, if we are linking with
1771 -Bsymbolic, we do not need to copy a reloc against a
1772 global symbol which is defined in an object we are
1773 including in the link (i.e., DEF_REGULAR is set). At
1774 this point we have not seen all the input files, so it is
1775 possible that DEF_REGULAR is not set now but will be set
1776 later (it is never cleared). In case of a weak definition,
1777 DEF_REGULAR may be cleared later by a strong definition in
1778 a shared library. We account for that possibility below by
1779 storing information in the relocs_copied field of the hash
1780 table entry. A similar situation occurs when creating
1781 shared libraries and symbol visibility changes render the
1784 If on the other hand, we are creating an executable, we
1785 may need to keep relocations for symbols satisfied by a
1786 dynamic library if we manage to avoid copy relocs for the
1789 && (sec
->flags
& SEC_ALLOC
) != 0
1790 && (r_type
!= R_386_PC32
1792 && (! SYMBOLIC_BIND (info
, h
)
1793 || h
->root
.type
== bfd_link_hash_defweak
1794 || !h
->def_regular
))))
1795 || (ELIMINATE_COPY_RELOCS
1797 && (sec
->flags
& SEC_ALLOC
) != 0
1799 && (h
->root
.type
== bfd_link_hash_defweak
1800 || !h
->def_regular
)))
1802 struct elf_dyn_relocs
*p
;
1803 struct elf_dyn_relocs
**head
;
1805 /* We must copy these reloc types into the output file.
1806 Create a reloc section in dynobj and make room for
1810 if (htab
->elf
.dynobj
== NULL
)
1811 htab
->elf
.dynobj
= abfd
;
1813 sreloc
= _bfd_elf_make_dynamic_reloc_section
1814 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1820 /* If this is a global symbol, we count the number of
1821 relocations we need for this symbol. */
1824 head
= &eh
->dyn_relocs
;
1828 /* Track dynamic relocs needed for local syms too.
1829 We really need local syms available to do this
1834 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1839 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1843 vpp
= &elf_section_data (s
)->local_dynrel
;
1844 head
= (struct elf_dyn_relocs
**)vpp
;
1848 if (p
== NULL
|| p
->sec
!= sec
)
1850 bfd_size_type amt
= sizeof *p
;
1851 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1863 /* Count size relocation as PC-relative relocation. */
1864 if (r_type
== R_386_PC32
|| size_reloc
)
1869 /* This relocation describes the C++ object vtable hierarchy.
1870 Reconstruct it for later use during GC. */
1871 case R_386_GNU_VTINHERIT
:
1872 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1876 /* This relocation describes which C++ vtable entries are actually
1877 used. Record for later use during GC. */
1878 case R_386_GNU_VTENTRY
:
1879 BFD_ASSERT (h
!= NULL
);
1881 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1891 && h
->plt
.refcount
> 0
1892 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
1893 || h
->got
.refcount
> 0)
1894 && htab
->plt_got
== NULL
)
1896 /* Create the GOT procedure linkage table. */
1897 unsigned int plt_got_align
;
1898 const struct elf_backend_data
*bed
;
1900 bed
= get_elf_backend_data (info
->output_bfd
);
1901 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1902 && (sizeof (elf_i386_got_plt_entry
)
1903 == sizeof (elf_i386_pic_got_plt_entry
)));
1906 if (htab
->elf
.dynobj
== NULL
)
1907 htab
->elf
.dynobj
= abfd
;
1909 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1911 (bed
->dynamic_sec_flags
1916 if (htab
->plt_got
== NULL
1917 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1923 if (r_type
== R_386_GOT32
1924 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1925 sec
->need_convert_mov_to_lea
= 1;
1931 /* Return the section that should be marked against GC for a given
1935 elf_i386_gc_mark_hook (asection
*sec
,
1936 struct bfd_link_info
*info
,
1937 Elf_Internal_Rela
*rel
,
1938 struct elf_link_hash_entry
*h
,
1939 Elf_Internal_Sym
*sym
)
1942 switch (ELF32_R_TYPE (rel
->r_info
))
1944 case R_386_GNU_VTINHERIT
:
1945 case R_386_GNU_VTENTRY
:
1949 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1952 /* Update the got entry reference counts for the section being removed. */
1955 elf_i386_gc_sweep_hook (bfd
*abfd
,
1956 struct bfd_link_info
*info
,
1958 const Elf_Internal_Rela
*relocs
)
1960 struct elf_i386_link_hash_table
*htab
;
1961 Elf_Internal_Shdr
*symtab_hdr
;
1962 struct elf_link_hash_entry
**sym_hashes
;
1963 bfd_signed_vma
*local_got_refcounts
;
1964 const Elf_Internal_Rela
*rel
, *relend
;
1966 if (info
->relocatable
)
1969 htab
= elf_i386_hash_table (info
);
1973 elf_section_data (sec
)->local_dynrel
= NULL
;
1975 symtab_hdr
= &elf_symtab_hdr (abfd
);
1976 sym_hashes
= elf_sym_hashes (abfd
);
1977 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1979 relend
= relocs
+ sec
->reloc_count
;
1980 for (rel
= relocs
; rel
< relend
; rel
++)
1982 unsigned long r_symndx
;
1983 unsigned int r_type
;
1984 struct elf_link_hash_entry
*h
= NULL
;
1986 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1987 if (r_symndx
>= symtab_hdr
->sh_info
)
1989 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1990 while (h
->root
.type
== bfd_link_hash_indirect
1991 || h
->root
.type
== bfd_link_hash_warning
)
1992 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1996 /* A local symbol. */
1997 Elf_Internal_Sym
*isym
;
1999 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2002 /* Check relocation against local STT_GNU_IFUNC symbol. */
2004 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2006 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2014 struct elf_i386_link_hash_entry
*eh
;
2015 struct elf_dyn_relocs
**pp
;
2016 struct elf_dyn_relocs
*p
;
2018 eh
= (struct elf_i386_link_hash_entry
*) h
;
2019 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2022 /* Everything must go for SEC. */
2028 r_type
= ELF32_R_TYPE (rel
->r_info
);
2029 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
2030 symtab_hdr
, sym_hashes
,
2031 &r_type
, GOT_UNKNOWN
,
2032 rel
, relend
, h
, r_symndx
))
2038 if (htab
->tls_ldm_got
.refcount
> 0)
2039 htab
->tls_ldm_got
.refcount
-= 1;
2043 case R_386_TLS_GOTDESC
:
2044 case R_386_TLS_DESC_CALL
:
2045 case R_386_TLS_IE_32
:
2047 case R_386_TLS_GOTIE
:
2051 if (h
->got
.refcount
> 0)
2052 h
->got
.refcount
-= 1;
2053 if (h
->type
== STT_GNU_IFUNC
)
2055 if (h
->plt
.refcount
> 0)
2056 h
->plt
.refcount
-= 1;
2059 else if (local_got_refcounts
!= NULL
)
2061 if (local_got_refcounts
[r_symndx
] > 0)
2062 local_got_refcounts
[r_symndx
] -= 1;
2070 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2077 if (h
->plt
.refcount
> 0)
2078 h
->plt
.refcount
-= 1;
2083 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2085 if (h
->got
.refcount
> 0)
2086 h
->got
.refcount
-= 1;
2087 if (h
->plt
.refcount
> 0)
2088 h
->plt
.refcount
-= 1;
2100 /* Adjust a symbol defined by a dynamic object and referenced by a
2101 regular object. The current definition is in some section of the
2102 dynamic object, but we're not including those sections. We have to
2103 change the definition to something the rest of the link can
2107 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2108 struct elf_link_hash_entry
*h
)
2110 struct elf_i386_link_hash_table
*htab
;
2112 struct elf_i386_link_hash_entry
*eh
;
2113 struct elf_dyn_relocs
*p
;
2115 /* STT_GNU_IFUNC symbol must go through PLT. */
2116 if (h
->type
== STT_GNU_IFUNC
)
2118 /* All local STT_GNU_IFUNC references must be treate as local
2119 calls via local PLT. */
2121 && SYMBOL_CALLS_LOCAL (info
, h
))
2123 bfd_size_type pc_count
= 0, count
= 0;
2124 struct elf_dyn_relocs
**pp
;
2126 eh
= (struct elf_i386_link_hash_entry
*) h
;
2127 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2129 pc_count
+= p
->pc_count
;
2130 p
->count
-= p
->pc_count
;
2139 if (pc_count
|| count
)
2143 if (h
->plt
.refcount
<= 0)
2144 h
->plt
.refcount
= 1;
2146 h
->plt
.refcount
+= 1;
2150 if (h
->plt
.refcount
<= 0)
2152 h
->plt
.offset
= (bfd_vma
) -1;
2158 /* If this is a function, put it in the procedure linkage table. We
2159 will fill in the contents of the procedure linkage table later,
2160 when we know the address of the .got section. */
2161 if (h
->type
== STT_FUNC
2164 if (h
->plt
.refcount
<= 0
2165 || SYMBOL_CALLS_LOCAL (info
, h
)
2166 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2167 && h
->root
.type
== bfd_link_hash_undefweak
))
2169 /* This case can occur if we saw a PLT32 reloc in an input
2170 file, but the symbol was never referred to by a dynamic
2171 object, or if all references were garbage collected. In
2172 such a case, we don't actually need to build a procedure
2173 linkage table, and we can just do a PC32 reloc instead. */
2174 h
->plt
.offset
= (bfd_vma
) -1;
2181 /* It's possible that we incorrectly decided a .plt reloc was
2182 needed for an R_386_PC32 reloc to a non-function sym in
2183 check_relocs. We can't decide accurately between function and
2184 non-function syms in check-relocs; Objects loaded later in
2185 the link may change h->type. So fix it now. */
2186 h
->plt
.offset
= (bfd_vma
) -1;
2188 /* If this is a weak symbol, and there is a real definition, the
2189 processor independent code will have arranged for us to see the
2190 real definition first, and we can just use the same value. */
2191 if (h
->u
.weakdef
!= NULL
)
2193 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2194 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2195 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2196 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2197 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2198 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2202 /* This is a reference to a symbol defined by a dynamic object which
2203 is not a function. */
2205 /* If we are creating a shared library, we must presume that the
2206 only references to the symbol are via the global offset table.
2207 For such cases we need not do anything here; the relocations will
2208 be handled correctly by relocate_section. */
2209 if (!info
->executable
)
2212 /* If there are no references to this symbol that do not use the
2213 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2215 eh
= (struct elf_i386_link_hash_entry
*) h
;
2216 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2219 /* If -z nocopyreloc was given, we won't generate them either. */
2220 if (info
->nocopyreloc
)
2226 htab
= elf_i386_hash_table (info
);
2230 /* If there aren't any dynamic relocs in read-only sections nor
2231 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2232 avoid the copy reloc. This doesn't work on VxWorks, where we can
2233 not have dynamic relocations (other than copy and jump slot
2234 relocations) in an executable. */
2235 if (ELIMINATE_COPY_RELOCS
2237 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2239 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2241 s
= p
->sec
->output_section
;
2242 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2253 /* We must allocate the symbol in our .dynbss section, which will
2254 become part of the .bss section of the executable. There will be
2255 an entry for this symbol in the .dynsym section. The dynamic
2256 object will contain position independent code, so all references
2257 from the dynamic object to this symbol will go through the global
2258 offset table. The dynamic linker will use the .dynsym entry to
2259 determine the address it must put in the global offset table, so
2260 both the dynamic object and the regular object will refer to the
2261 same memory location for the variable. */
2263 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2264 copy the initial value out of the dynamic object and into the
2265 runtime process image. */
2266 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2268 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2274 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2277 /* Allocate space in .plt, .got and associated reloc sections for
2281 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2283 struct bfd_link_info
*info
;
2284 struct elf_i386_link_hash_table
*htab
;
2285 struct elf_i386_link_hash_entry
*eh
;
2286 struct elf_dyn_relocs
*p
;
2287 unsigned plt_entry_size
;
2289 if (h
->root
.type
== bfd_link_hash_indirect
)
2292 eh
= (struct elf_i386_link_hash_entry
*) h
;
2294 info
= (struct bfd_link_info
*) inf
;
2295 htab
= elf_i386_hash_table (info
);
2299 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2301 /* We can't use the GOT PLT if pointer equality is needed since
2302 finish_dynamic_symbol won't clear symbol value and the dynamic
2303 linker won't update the GOT slot. We will get into an infinite
2304 loop at run-time. */
2305 if (htab
->plt_got
!= NULL
2306 && h
->type
!= STT_GNU_IFUNC
2307 && !h
->pointer_equality_needed
2308 && h
->plt
.refcount
> 0
2309 && h
->got
.refcount
> 0)
2311 /* Don't use the regular PLT if there are both GOT and GOTPLT
2313 h
->plt
.offset
= (bfd_vma
) -1;
2315 /* Use the GOT PLT. */
2316 eh
->plt_got
.refcount
= 1;
2319 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2320 here if it is defined and referenced in a non-shared object. */
2321 if (h
->type
== STT_GNU_IFUNC
2323 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2326 else if (htab
->elf
.dynamic_sections_created
2327 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2329 bfd_boolean use_plt_got
;
2331 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2333 /* Don't use the regular PLT for DF_BIND_NOW. */
2334 h
->plt
.offset
= (bfd_vma
) -1;
2336 /* Use the GOT PLT. */
2337 h
->got
.refcount
= 1;
2338 eh
->plt_got
.refcount
= 1;
2341 use_plt_got
= eh
->plt_got
.refcount
> 0;
2343 /* Make sure this symbol is output as a dynamic symbol.
2344 Undefined weak syms won't yet be marked as dynamic. */
2345 if (h
->dynindx
== -1
2346 && !h
->forced_local
)
2348 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2353 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2355 asection
*s
= htab
->elf
.splt
;
2356 asection
*got_s
= htab
->plt_got
;
2358 /* If this is the first .plt entry, make room for the special
2359 first entry. The .plt section is used by prelink to undo
2360 prelinking for dynamic relocations. */
2362 s
->size
= plt_entry_size
;
2365 eh
->plt_got
.offset
= got_s
->size
;
2367 h
->plt
.offset
= s
->size
;
2369 /* If this symbol is not defined in a regular file, and we are
2370 not generating a shared library, then set the symbol to this
2371 location in the .plt. This is required to make function
2372 pointers compare as equal between the normal executable and
2373 the shared library. */
2379 /* We need to make a call to the entry of the GOT PLT
2380 instead of regular PLT entry. */
2381 h
->root
.u
.def
.section
= got_s
;
2382 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2386 h
->root
.u
.def
.section
= s
;
2387 h
->root
.u
.def
.value
= h
->plt
.offset
;
2391 /* Make room for this entry. */
2393 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2396 s
->size
+= plt_entry_size
;
2398 /* We also need to make an entry in the .got.plt section,
2399 which will be placed in the .got section by the linker
2401 htab
->elf
.sgotplt
->size
+= 4;
2403 /* We also need to make an entry in the .rel.plt section. */
2404 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2405 htab
->elf
.srelplt
->reloc_count
++;
2408 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2411 /* VxWorks has a second set of relocations for each PLT entry
2412 in executables. They go in a separate relocation section,
2413 which is processed by the kernel loader. */
2415 /* There are two relocations for the initial PLT entry: an
2416 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2417 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2419 if (h
->plt
.offset
== plt_entry_size
)
2420 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2422 /* There are two extra relocations for each subsequent PLT entry:
2423 an R_386_32 relocation for the GOT entry, and an R_386_32
2424 relocation for the PLT entry. */
2426 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2431 h
->plt
.offset
= (bfd_vma
) -1;
2437 h
->plt
.offset
= (bfd_vma
) -1;
2441 eh
->tlsdesc_got
= (bfd_vma
) -1;
2443 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2444 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2445 if (h
->got
.refcount
> 0
2448 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2449 h
->got
.offset
= (bfd_vma
) -1;
2450 else if (h
->got
.refcount
> 0)
2454 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2456 /* Make sure this symbol is output as a dynamic symbol.
2457 Undefined weak syms won't yet be marked as dynamic. */
2458 if (h
->dynindx
== -1
2459 && !h
->forced_local
)
2461 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2466 if (GOT_TLS_GDESC_P (tls_type
))
2468 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2469 - elf_i386_compute_jump_table_size (htab
);
2470 htab
->elf
.sgotplt
->size
+= 8;
2471 h
->got
.offset
= (bfd_vma
) -2;
2473 if (! GOT_TLS_GDESC_P (tls_type
)
2474 || GOT_TLS_GD_P (tls_type
))
2476 h
->got
.offset
= s
->size
;
2478 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2479 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2482 dyn
= htab
->elf
.dynamic_sections_created
;
2483 /* R_386_TLS_IE_32 needs one dynamic relocation,
2484 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2485 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2486 need two), R_386_TLS_GD needs one if local symbol and two if
2488 if (tls_type
== GOT_TLS_IE_BOTH
)
2489 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2490 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2491 || (tls_type
& GOT_TLS_IE
))
2492 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2493 else if (GOT_TLS_GD_P (tls_type
))
2494 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2495 else if (! GOT_TLS_GDESC_P (tls_type
)
2496 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2497 || h
->root
.type
!= bfd_link_hash_undefweak
)
2499 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2500 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2501 if (GOT_TLS_GDESC_P (tls_type
))
2502 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2505 h
->got
.offset
= (bfd_vma
) -1;
2507 if (eh
->dyn_relocs
== NULL
)
2510 /* In the shared -Bsymbolic case, discard space allocated for
2511 dynamic pc-relative relocs against symbols which turn out to be
2512 defined in regular objects. For the normal shared case, discard
2513 space for pc-relative relocs that have become local due to symbol
2514 visibility changes. */
2518 /* The only reloc that uses pc_count is R_386_PC32, which will
2519 appear on a call or on something like ".long foo - .". We
2520 want calls to protected symbols to resolve directly to the
2521 function rather than going via the plt. If people want
2522 function pointer comparisons to work as expected then they
2523 should avoid writing assembly like ".long foo - .". */
2524 if (SYMBOL_CALLS_LOCAL (info
, h
))
2526 struct elf_dyn_relocs
**pp
;
2528 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2530 p
->count
-= p
->pc_count
;
2539 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2541 struct elf_dyn_relocs
**pp
;
2542 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2544 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2551 /* Also discard relocs on undefined weak syms with non-default
2553 if (eh
->dyn_relocs
!= NULL
2554 && h
->root
.type
== bfd_link_hash_undefweak
)
2556 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2557 eh
->dyn_relocs
= NULL
;
2559 /* Make sure undefined weak symbols are output as a dynamic
2561 else if (h
->dynindx
== -1
2562 && !h
->forced_local
)
2564 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2569 else if (ELIMINATE_COPY_RELOCS
)
2571 /* For the non-shared case, discard space for relocs against
2572 symbols which turn out to need copy relocs or are not
2578 || (htab
->elf
.dynamic_sections_created
2579 && (h
->root
.type
== bfd_link_hash_undefweak
2580 || h
->root
.type
== bfd_link_hash_undefined
))))
2582 /* Make sure this symbol is output as a dynamic symbol.
2583 Undefined weak syms won't yet be marked as dynamic. */
2584 if (h
->dynindx
== -1
2585 && !h
->forced_local
)
2587 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2591 /* If that succeeded, we know we'll be keeping all the
2593 if (h
->dynindx
!= -1)
2597 eh
->dyn_relocs
= NULL
;
2602 /* Finally, allocate space. */
2603 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2607 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2609 BFD_ASSERT (sreloc
!= NULL
);
2610 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2616 /* Allocate space in .plt, .got and associated reloc sections for
2617 local dynamic relocs. */
2620 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2622 struct elf_link_hash_entry
*h
2623 = (struct elf_link_hash_entry
*) *slot
;
2625 if (h
->type
!= STT_GNU_IFUNC
2629 || h
->root
.type
!= bfd_link_hash_defined
)
2632 return elf_i386_allocate_dynrelocs (h
, inf
);
2635 /* Find any dynamic relocs that apply to read-only sections. */
2638 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2640 struct elf_i386_link_hash_entry
*eh
;
2641 struct elf_dyn_relocs
*p
;
2643 /* Skip local IFUNC symbols. */
2644 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2647 eh
= (struct elf_i386_link_hash_entry
*) h
;
2648 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2650 asection
*s
= p
->sec
->output_section
;
2652 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2654 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2656 info
->flags
|= DF_TEXTREL
;
2658 if ((info
->warn_shared_textrel
&& info
->shared
)
2659 || info
->error_textrel
)
2660 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2661 p
->sec
->owner
, h
->root
.root
.string
,
2664 /* Not an error, just cut short the traversal. */
2672 mov foo@GOT(%reg), %reg
2674 lea foo@GOTOFF(%reg), %reg
2675 with the local symbol, foo. */
2678 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2679 struct bfd_link_info
*link_info
)
2681 Elf_Internal_Shdr
*symtab_hdr
;
2682 Elf_Internal_Rela
*internal_relocs
;
2683 Elf_Internal_Rela
*irel
, *irelend
;
2685 struct elf_i386_link_hash_table
*htab
;
2686 bfd_boolean changed_contents
;
2687 bfd_boolean changed_relocs
;
2688 bfd_signed_vma
*local_got_refcounts
;
2690 /* Don't even try to convert non-ELF outputs. */
2691 if (!is_elf_hash_table (link_info
->hash
))
2694 /* Nothing to do if there is no need or no output. */
2695 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2696 || sec
->need_convert_mov_to_lea
== 0
2697 || bfd_is_abs_section (sec
->output_section
))
2700 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2702 /* Load the relocations for this section. */
2703 internal_relocs
= (_bfd_elf_link_read_relocs
2704 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2705 link_info
->keep_memory
));
2706 if (internal_relocs
== NULL
)
2709 htab
= elf_i386_hash_table (link_info
);
2710 changed_contents
= FALSE
;
2711 changed_relocs
= FALSE
;
2712 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2714 /* Get the section contents. */
2715 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2716 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2719 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2723 irelend
= internal_relocs
+ sec
->reloc_count
;
2724 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2726 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2727 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2729 struct elf_link_hash_entry
*h
;
2731 if (r_type
!= R_386_GOT32
)
2734 /* Get the symbol referred to by the reloc. */
2735 if (r_symndx
< symtab_hdr
->sh_info
)
2737 Elf_Internal_Sym
*isym
;
2739 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2742 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2743 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2744 && irel
->r_offset
>= 2
2745 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2747 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2748 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2749 if (local_got_refcounts
!= NULL
2750 && local_got_refcounts
[r_symndx
] > 0)
2751 local_got_refcounts
[r_symndx
] -= 1;
2752 changed_contents
= TRUE
;
2753 changed_relocs
= TRUE
;
2758 indx
= r_symndx
- symtab_hdr
->sh_info
;
2759 h
= elf_sym_hashes (abfd
)[indx
];
2760 BFD_ASSERT (h
!= NULL
);
2762 while (h
->root
.type
== bfd_link_hash_indirect
2763 || h
->root
.type
== bfd_link_hash_warning
)
2764 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2766 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2767 optimizing _DYNAMIC since ld.so may use its link-time address. */
2769 && h
->type
!= STT_GNU_IFUNC
2770 && h
!= htab
->elf
.hdynamic
2771 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2772 && irel
->r_offset
>= 2
2773 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2775 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2776 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2777 if (h
->got
.refcount
> 0)
2778 h
->got
.refcount
-= 1;
2779 changed_contents
= TRUE
;
2780 changed_relocs
= TRUE
;
2784 if (contents
!= NULL
2785 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2787 if (!changed_contents
&& !link_info
->keep_memory
)
2791 /* Cache the section contents for elf_link_input_bfd. */
2792 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2796 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2798 if (!changed_relocs
)
2799 free (internal_relocs
);
2801 elf_section_data (sec
)->relocs
= internal_relocs
;
2807 if (contents
!= NULL
2808 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2810 if (internal_relocs
!= NULL
2811 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2812 free (internal_relocs
);
2816 /* Set the sizes of the dynamic sections. */
2819 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2821 struct elf_i386_link_hash_table
*htab
;
2827 htab
= elf_i386_hash_table (info
);
2830 dynobj
= htab
->elf
.dynobj
;
2834 if (htab
->elf
.dynamic_sections_created
)
2836 /* Set the contents of the .interp section to the interpreter. */
2837 if (info
->executable
)
2839 s
= bfd_get_linker_section (dynobj
, ".interp");
2842 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2843 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2847 /* Set up .got offsets for local syms, and space for local dynamic
2849 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2851 bfd_signed_vma
*local_got
;
2852 bfd_signed_vma
*end_local_got
;
2853 char *local_tls_type
;
2854 bfd_vma
*local_tlsdesc_gotent
;
2855 bfd_size_type locsymcount
;
2856 Elf_Internal_Shdr
*symtab_hdr
;
2859 if (! is_i386_elf (ibfd
))
2862 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2864 struct elf_dyn_relocs
*p
;
2866 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2869 for (p
= ((struct elf_dyn_relocs
*)
2870 elf_section_data (s
)->local_dynrel
);
2874 if (!bfd_is_abs_section (p
->sec
)
2875 && bfd_is_abs_section (p
->sec
->output_section
))
2877 /* Input section has been discarded, either because
2878 it is a copy of a linkonce section or due to
2879 linker script /DISCARD/, so we'll be discarding
2882 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2883 && strcmp (p
->sec
->output_section
->name
,
2886 /* Relocations in vxworks .tls_vars sections are
2887 handled specially by the loader. */
2889 else if (p
->count
!= 0)
2891 srel
= elf_section_data (p
->sec
)->sreloc
;
2892 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2893 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2894 && (info
->flags
& DF_TEXTREL
) == 0)
2896 info
->flags
|= DF_TEXTREL
;
2897 if ((info
->warn_shared_textrel
&& info
->shared
)
2898 || info
->error_textrel
)
2899 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2900 p
->sec
->owner
, p
->sec
);
2906 local_got
= elf_local_got_refcounts (ibfd
);
2910 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2911 locsymcount
= symtab_hdr
->sh_info
;
2912 end_local_got
= local_got
+ locsymcount
;
2913 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2914 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2916 srel
= htab
->elf
.srelgot
;
2917 for (; local_got
< end_local_got
;
2918 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2920 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2923 if (GOT_TLS_GDESC_P (*local_tls_type
))
2925 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2926 - elf_i386_compute_jump_table_size (htab
);
2927 htab
->elf
.sgotplt
->size
+= 8;
2928 *local_got
= (bfd_vma
) -2;
2930 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2931 || GOT_TLS_GD_P (*local_tls_type
))
2933 *local_got
= s
->size
;
2935 if (GOT_TLS_GD_P (*local_tls_type
)
2936 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2940 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2941 || (*local_tls_type
& GOT_TLS_IE
))
2943 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2944 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2945 else if (GOT_TLS_GD_P (*local_tls_type
)
2946 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2947 srel
->size
+= sizeof (Elf32_External_Rel
);
2948 if (GOT_TLS_GDESC_P (*local_tls_type
))
2949 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2953 *local_got
= (bfd_vma
) -1;
2957 if (htab
->tls_ldm_got
.refcount
> 0)
2959 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2961 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2962 htab
->elf
.sgot
->size
+= 8;
2963 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2966 htab
->tls_ldm_got
.offset
= -1;
2968 /* Allocate global sym .plt and .got entries, and space for global
2969 sym dynamic relocs. */
2970 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2972 /* Allocate .plt and .got entries, and space for local symbols. */
2973 htab_traverse (htab
->loc_hash_table
,
2974 elf_i386_allocate_local_dynrelocs
,
2977 /* For every jump slot reserved in the sgotplt, reloc_count is
2978 incremented. However, when we reserve space for TLS descriptors,
2979 it's not incremented, so in order to compute the space reserved
2980 for them, it suffices to multiply the reloc count by the jump
2983 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2984 so that R_386_IRELATIVE entries come last. */
2985 if (htab
->elf
.srelplt
)
2987 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2988 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2989 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2991 else if (htab
->elf
.irelplt
)
2992 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2995 if (htab
->elf
.sgotplt
)
2997 /* Don't allocate .got.plt section if there are no GOT nor PLT
2998 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2999 if ((htab
->elf
.hgot
== NULL
3000 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3001 && (htab
->elf
.sgotplt
->size
3002 == get_elf_backend_data (output_bfd
)->got_header_size
)
3003 && (htab
->elf
.splt
== NULL
3004 || htab
->elf
.splt
->size
== 0)
3005 && (htab
->elf
.sgot
== NULL
3006 || htab
->elf
.sgot
->size
== 0)
3007 && (htab
->elf
.iplt
== NULL
3008 || htab
->elf
.iplt
->size
== 0)
3009 && (htab
->elf
.igotplt
== NULL
3010 || htab
->elf
.igotplt
->size
== 0))
3011 htab
->elf
.sgotplt
->size
= 0;
3015 if (htab
->plt_eh_frame
!= NULL
3016 && htab
->elf
.splt
!= NULL
3017 && htab
->elf
.splt
->size
!= 0
3018 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3019 && _bfd_elf_eh_frame_present (info
))
3020 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
3022 /* We now have determined the sizes of the various dynamic sections.
3023 Allocate memory for them. */
3025 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3027 bfd_boolean strip_section
= TRUE
;
3029 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3032 if (s
== htab
->elf
.splt
3033 || s
== htab
->elf
.sgot
)
3035 /* Strip this section if we don't need it; see the
3037 /* We'd like to strip these sections if they aren't needed, but if
3038 we've exported dynamic symbols from them we must leave them.
3039 It's too late to tell BFD to get rid of the symbols. */
3041 if (htab
->elf
.hplt
!= NULL
)
3042 strip_section
= FALSE
;
3044 else if (s
== htab
->elf
.sgotplt
3045 || s
== htab
->elf
.iplt
3046 || s
== htab
->elf
.igotplt
3047 || s
== htab
->plt_got
3048 || s
== htab
->plt_eh_frame
3049 || s
== htab
->sdynbss
)
3051 /* Strip these too. */
3053 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3056 && s
!= htab
->elf
.srelplt
3057 && s
!= htab
->srelplt2
)
3060 /* We use the reloc_count field as a counter if we need
3061 to copy relocs into the output file. */
3066 /* It's not one of our sections, so don't allocate space. */
3072 /* If we don't need this section, strip it from the
3073 output file. This is mostly to handle .rel.bss and
3074 .rel.plt. We must create both sections in
3075 create_dynamic_sections, because they must be created
3076 before the linker maps input sections to output
3077 sections. The linker does that before
3078 adjust_dynamic_symbol is called, and it is that
3079 function which decides whether anything needs to go
3080 into these sections. */
3082 s
->flags
|= SEC_EXCLUDE
;
3086 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3089 /* Allocate memory for the section contents. We use bfd_zalloc
3090 here in case unused entries are not reclaimed before the
3091 section's contents are written out. This should not happen,
3092 but this way if it does, we get a R_386_NONE reloc instead
3094 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3095 if (s
->contents
== NULL
)
3099 if (htab
->plt_eh_frame
!= NULL
3100 && htab
->plt_eh_frame
->contents
!= NULL
)
3102 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3103 sizeof (elf_i386_eh_frame_plt
));
3104 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3105 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3108 if (htab
->elf
.dynamic_sections_created
)
3110 /* Add some entries to the .dynamic section. We fill in the
3111 values later, in elf_i386_finish_dynamic_sections, but we
3112 must add the entries now so that we get the correct size for
3113 the .dynamic section. The DT_DEBUG entry is filled in by the
3114 dynamic linker and used by the debugger. */
3115 #define add_dynamic_entry(TAG, VAL) \
3116 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3118 if (info
->executable
)
3120 if (!add_dynamic_entry (DT_DEBUG
, 0))
3124 if (htab
->elf
.splt
->size
!= 0)
3126 /* DT_PLTGOT is used by prelink even if there is no PLT
3128 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3131 if (htab
->elf
.srelplt
->size
!= 0)
3133 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3134 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3135 || !add_dynamic_entry (DT_JMPREL
, 0))
3142 if (!add_dynamic_entry (DT_REL
, 0)
3143 || !add_dynamic_entry (DT_RELSZ
, 0)
3144 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3147 /* If any dynamic relocs apply to a read-only section,
3148 then we need a DT_TEXTREL entry. */
3149 if ((info
->flags
& DF_TEXTREL
) == 0)
3150 elf_link_hash_traverse (&htab
->elf
,
3151 elf_i386_readonly_dynrelocs
, info
);
3153 if ((info
->flags
& DF_TEXTREL
) != 0)
3155 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3159 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3160 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3163 #undef add_dynamic_entry
3169 elf_i386_always_size_sections (bfd
*output_bfd
,
3170 struct bfd_link_info
*info
)
3172 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3176 struct elf_link_hash_entry
*tlsbase
;
3178 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3179 "_TLS_MODULE_BASE_",
3180 FALSE
, FALSE
, FALSE
);
3182 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3184 struct elf_i386_link_hash_table
*htab
;
3185 struct bfd_link_hash_entry
*bh
= NULL
;
3186 const struct elf_backend_data
*bed
3187 = get_elf_backend_data (output_bfd
);
3189 htab
= elf_i386_hash_table (info
);
3193 if (!(_bfd_generic_link_add_one_symbol
3194 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3195 tls_sec
, 0, NULL
, FALSE
,
3196 bed
->collect
, &bh
)))
3199 htab
->tls_module_base
= bh
;
3201 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3202 tlsbase
->def_regular
= 1;
3203 tlsbase
->other
= STV_HIDDEN
;
3204 tlsbase
->root
.linker_def
= 1;
3205 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3212 /* Set the correct type for an x86 ELF section. We do this by the
3213 section name, which is a hack, but ought to work. */
3216 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3217 Elf_Internal_Shdr
*hdr
,
3222 name
= bfd_get_section_name (abfd
, sec
);
3224 /* This is an ugly, but unfortunately necessary hack that is
3225 needed when producing EFI binaries on x86. It tells
3226 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3227 containing ELF relocation info. We need this hack in order to
3228 be able to generate ELF binaries that can be translated into
3229 EFI applications (which are essentially COFF objects). Those
3230 files contain a COFF ".reloc" section inside an ELFNN object,
3231 which would normally cause BFD to segfault because it would
3232 attempt to interpret this section as containing relocation
3233 entries for section "oc". With this hack enabled, ".reloc"
3234 will be treated as a normal data section, which will avoid the
3235 segfault. However, you won't be able to create an ELFNN binary
3236 with a section named "oc" that needs relocations, but that's
3237 the kind of ugly side-effects you get when detecting section
3238 types based on their names... In practice, this limitation is
3239 unlikely to bite. */
3240 if (strcmp (name
, ".reloc") == 0)
3241 hdr
->sh_type
= SHT_PROGBITS
;
3246 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3247 executables. Rather than setting it to the beginning of the TLS
3248 section, we have to set it to the end. This function may be called
3249 multiple times, it is idempotent. */
3252 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3254 struct elf_i386_link_hash_table
*htab
;
3255 struct bfd_link_hash_entry
*base
;
3257 if (!info
->executable
)
3260 htab
= elf_i386_hash_table (info
);
3264 base
= htab
->tls_module_base
;
3268 base
->u
.def
.value
= htab
->elf
.tls_size
;
3271 /* Return the base VMA address which should be subtracted from real addresses
3272 when resolving @dtpoff relocation.
3273 This is PT_TLS segment p_vaddr. */
3276 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3278 /* If tls_sec is NULL, we should have signalled an error already. */
3279 if (elf_hash_table (info
)->tls_sec
== NULL
)
3281 return elf_hash_table (info
)->tls_sec
->vma
;
3284 /* Return the relocation value for @tpoff relocation
3285 if STT_TLS virtual address is ADDRESS. */
3288 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3290 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3291 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3292 bfd_vma static_tls_size
;
3294 /* If tls_sec is NULL, we should have signalled an error already. */
3295 if (htab
->tls_sec
== NULL
)
3298 /* Consider special static TLS alignment requirements. */
3299 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3300 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3303 /* Relocate an i386 ELF section. */
3306 elf_i386_relocate_section (bfd
*output_bfd
,
3307 struct bfd_link_info
*info
,
3309 asection
*input_section
,
3311 Elf_Internal_Rela
*relocs
,
3312 Elf_Internal_Sym
*local_syms
,
3313 asection
**local_sections
)
3315 struct elf_i386_link_hash_table
*htab
;
3316 Elf_Internal_Shdr
*symtab_hdr
;
3317 struct elf_link_hash_entry
**sym_hashes
;
3318 bfd_vma
*local_got_offsets
;
3319 bfd_vma
*local_tlsdesc_gotents
;
3320 Elf_Internal_Rela
*rel
;
3321 Elf_Internal_Rela
*relend
;
3322 bfd_boolean is_vxworks_tls
;
3323 unsigned plt_entry_size
;
3325 BFD_ASSERT (is_i386_elf (input_bfd
));
3327 htab
= elf_i386_hash_table (info
);
3330 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3331 sym_hashes
= elf_sym_hashes (input_bfd
);
3332 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3333 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3334 /* We have to handle relocations in vxworks .tls_vars sections
3335 specially, because the dynamic loader is 'weird'. */
3336 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3338 && !strcmp (input_section
->output_section
->name
,
3341 elf_i386_set_tls_module_base (info
);
3343 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3346 relend
= relocs
+ input_section
->reloc_count
;
3347 for (; rel
< relend
; rel
++)
3349 unsigned int r_type
;
3350 reloc_howto_type
*howto
;
3351 unsigned long r_symndx
;
3352 struct elf_link_hash_entry
*h
;
3353 struct elf_i386_link_hash_entry
*eh
;
3354 Elf_Internal_Sym
*sym
;
3356 bfd_vma off
, offplt
, plt_offset
;
3358 bfd_boolean unresolved_reloc
;
3359 bfd_reloc_status_type r
;
3363 asection
*resolved_plt
;
3365 r_type
= ELF32_R_TYPE (rel
->r_info
);
3366 if (r_type
== R_386_GNU_VTINHERIT
3367 || r_type
== R_386_GNU_VTENTRY
)
3370 if ((indx
= r_type
) >= R_386_standard
3371 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3372 >= R_386_ext
- R_386_standard
)
3373 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3374 >= R_386_irelative
- R_386_ext
))
3376 (*_bfd_error_handler
)
3377 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3378 input_bfd
, input_section
, r_type
);
3379 bfd_set_error (bfd_error_bad_value
);
3382 howto
= elf_howto_table
+ indx
;
3384 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3388 unresolved_reloc
= FALSE
;
3389 if (r_symndx
< symtab_hdr
->sh_info
)
3391 sym
= local_syms
+ r_symndx
;
3392 sec
= local_sections
[r_symndx
];
3393 relocation
= (sec
->output_section
->vma
3394 + sec
->output_offset
3396 st_size
= sym
->st_size
;
3398 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3399 && ((sec
->flags
& SEC_MERGE
) != 0
3400 || (info
->relocatable
3401 && sec
->output_offset
!= 0)))
3404 bfd_byte
*where
= contents
+ rel
->r_offset
;
3406 switch (howto
->size
)
3409 addend
= bfd_get_8 (input_bfd
, where
);
3410 if (howto
->pc_relative
)
3412 addend
= (addend
^ 0x80) - 0x80;
3417 addend
= bfd_get_16 (input_bfd
, where
);
3418 if (howto
->pc_relative
)
3420 addend
= (addend
^ 0x8000) - 0x8000;
3425 addend
= bfd_get_32 (input_bfd
, where
);
3426 if (howto
->pc_relative
)
3428 addend
= (addend
^ 0x80000000) - 0x80000000;
3436 if (info
->relocatable
)
3437 addend
+= sec
->output_offset
;
3440 asection
*msec
= sec
;
3441 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3443 addend
-= relocation
;
3444 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3447 switch (howto
->size
)
3450 /* FIXME: overflow checks. */
3451 if (howto
->pc_relative
)
3453 bfd_put_8 (input_bfd
, addend
, where
);
3456 if (howto
->pc_relative
)
3458 bfd_put_16 (input_bfd
, addend
, where
);
3461 if (howto
->pc_relative
)
3463 bfd_put_32 (input_bfd
, addend
, where
);
3467 else if (!info
->relocatable
3468 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3470 /* Relocate against local STT_GNU_IFUNC symbol. */
3471 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3476 /* Set STT_GNU_IFUNC symbol value. */
3477 h
->root
.u
.def
.value
= sym
->st_value
;
3478 h
->root
.u
.def
.section
= sec
;
3483 bfd_boolean warned ATTRIBUTE_UNUSED
;
3484 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3486 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3487 r_symndx
, symtab_hdr
, sym_hashes
,
3489 unresolved_reloc
, warned
, ignored
);
3493 if (sec
!= NULL
&& discarded_section (sec
))
3494 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3495 rel
, 1, relend
, howto
, 0, contents
);
3497 if (info
->relocatable
)
3500 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3501 it here if it is defined in a non-shared object. */
3503 && h
->type
== STT_GNU_IFUNC
3506 asection
*plt
, *gotplt
, *base_got
;
3510 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3512 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3513 sections because such sections are not SEC_ALLOC and
3514 thus ld.so will not process them. */
3515 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
3519 else if (h
->plt
.offset
== (bfd_vma
) -1)
3522 /* STT_GNU_IFUNC symbol must go through PLT. */
3523 if (htab
->elf
.splt
!= NULL
)
3525 plt
= htab
->elf
.splt
;
3526 gotplt
= htab
->elf
.sgotplt
;
3530 plt
= htab
->elf
.iplt
;
3531 gotplt
= htab
->elf
.igotplt
;
3534 relocation
= (plt
->output_section
->vma
3535 + plt
->output_offset
+ h
->plt
.offset
);
3540 if (h
->root
.root
.string
)
3541 name
= h
->root
.root
.string
;
3543 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3545 (*_bfd_error_handler
)
3546 (_("%B: relocation %s against STT_GNU_IFUNC "
3547 "symbol `%s' isn't handled by %s"), input_bfd
,
3548 elf_howto_table
[r_type
].name
,
3549 name
, __FUNCTION__
);
3550 bfd_set_error (bfd_error_bad_value
);
3554 /* Generate dynamic relcoation only when there is a
3555 non-GOT reference in a shared object. */
3556 if (info
->shared
&& h
->non_got_ref
)
3558 Elf_Internal_Rela outrel
;
3562 /* Need a dynamic relocation to get the real function
3564 offset
= _bfd_elf_section_offset (output_bfd
,
3568 if (offset
== (bfd_vma
) -1
3569 || offset
== (bfd_vma
) -2)
3572 outrel
.r_offset
= (input_section
->output_section
->vma
3573 + input_section
->output_offset
3576 if (h
->dynindx
== -1
3578 || info
->executable
)
3580 /* This symbol is resolved locally. */
3581 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3582 bfd_put_32 (output_bfd
,
3583 (h
->root
.u
.def
.value
3584 + h
->root
.u
.def
.section
->output_section
->vma
3585 + h
->root
.u
.def
.section
->output_offset
),
3589 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3591 sreloc
= htab
->elf
.irelifunc
;
3592 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3594 /* If this reloc is against an external symbol, we
3595 do not want to fiddle with the addend. Otherwise,
3596 we need to include the symbol value so that it
3597 becomes an addend for the dynamic reloc. For an
3598 internal symbol, we have updated addend. */
3607 base_got
= htab
->elf
.sgot
;
3608 off
= h
->got
.offset
;
3610 if (base_got
== NULL
)
3613 if (off
== (bfd_vma
) -1)
3615 /* We can't use h->got.offset here to save state, or
3616 even just remember the offset, as finish_dynamic_symbol
3617 would use that as offset into .got. */
3619 if (htab
->elf
.splt
!= NULL
)
3621 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3622 off
= (plt_index
+ 3) * 4;
3623 base_got
= htab
->elf
.sgotplt
;
3627 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3628 off
= plt_index
* 4;
3629 base_got
= htab
->elf
.igotplt
;
3632 if (h
->dynindx
== -1
3636 /* This references the local defitionion. We must
3637 initialize this entry in the global offset table.
3638 Since the offset must always be a multiple of 8,
3639 we use the least significant bit to record
3640 whether we have initialized it already.
3642 When doing a dynamic link, we create a .rela.got
3643 relocation entry to initialize the value. This
3644 is done in the finish_dynamic_symbol routine. */
3649 bfd_put_32 (output_bfd
, relocation
,
3650 base_got
->contents
+ off
);
3657 /* Adjust for static executables. */
3658 if (htab
->elf
.splt
== NULL
)
3659 relocation
+= gotplt
->output_offset
;
3663 relocation
= (base_got
->output_section
->vma
3664 + base_got
->output_offset
+ off
3665 - gotplt
->output_section
->vma
3666 - gotplt
->output_offset
);
3667 /* Adjust for static executables. */
3668 if (htab
->elf
.splt
== NULL
)
3669 relocation
+= gotplt
->output_offset
;
3675 relocation
-= (gotplt
->output_section
->vma
3676 + gotplt
->output_offset
);
3684 /* Relocation is to the entry for this symbol in the global
3686 if (htab
->elf
.sgot
== NULL
)
3693 off
= h
->got
.offset
;
3694 dyn
= htab
->elf
.dynamic_sections_created
;
3695 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3697 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3698 || (ELF_ST_VISIBILITY (h
->other
)
3699 && h
->root
.type
== bfd_link_hash_undefweak
))
3701 /* This is actually a static link, or it is a
3702 -Bsymbolic link and the symbol is defined
3703 locally, or the symbol was forced to be local
3704 because of a version file. We must initialize
3705 this entry in the global offset table. Since the
3706 offset must always be a multiple of 4, we use the
3707 least significant bit to record whether we have
3708 initialized it already.
3710 When doing a dynamic link, we create a .rel.got
3711 relocation entry to initialize the value. This
3712 is done in the finish_dynamic_symbol routine. */
3717 bfd_put_32 (output_bfd
, relocation
,
3718 htab
->elf
.sgot
->contents
+ off
);
3723 unresolved_reloc
= FALSE
;
3727 if (local_got_offsets
== NULL
)
3730 off
= local_got_offsets
[r_symndx
];
3732 /* The offset must always be a multiple of 4. We use
3733 the least significant bit to record whether we have
3734 already generated the necessary reloc. */
3739 bfd_put_32 (output_bfd
, relocation
,
3740 htab
->elf
.sgot
->contents
+ off
);
3745 Elf_Internal_Rela outrel
;
3747 s
= htab
->elf
.srelgot
;
3751 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3752 + htab
->elf
.sgot
->output_offset
3754 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3755 elf_append_rel (output_bfd
, s
, &outrel
);
3758 local_got_offsets
[r_symndx
] |= 1;
3762 if (off
>= (bfd_vma
) -2)
3765 relocation
= htab
->elf
.sgot
->output_section
->vma
3766 + htab
->elf
.sgot
->output_offset
+ off
3767 - htab
->elf
.sgotplt
->output_section
->vma
3768 - htab
->elf
.sgotplt
->output_offset
;
3772 /* Relocation is relative to the start of the global offset
3775 /* Check to make sure it isn't a protected function or data
3776 symbol for shared library since it may not be local when
3777 used as function address or with copy relocation. We also
3778 need to make sure that a symbol is referenced locally. */
3779 if (!info
->executable
&& h
)
3781 if (!h
->def_regular
)
3785 switch (ELF_ST_VISIBILITY (h
->other
))
3788 v
= _("hidden symbol");
3791 v
= _("internal symbol");
3794 v
= _("protected symbol");
3801 (*_bfd_error_handler
)
3802 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3803 input_bfd
, v
, h
->root
.root
.string
);
3804 bfd_set_error (bfd_error_bad_value
);
3807 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
3808 && (h
->type
== STT_FUNC
3809 || h
->type
== STT_OBJECT
)
3810 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3812 (*_bfd_error_handler
)
3813 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3815 h
->type
== STT_FUNC
? "function" : "data",
3816 h
->root
.root
.string
);
3817 bfd_set_error (bfd_error_bad_value
);
3822 /* Note that sgot is not involved in this
3823 calculation. We always want the start of .got.plt. If we
3824 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3825 permitted by the ABI, we might have to change this
3827 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3828 + htab
->elf
.sgotplt
->output_offset
;
3832 /* Use global offset table as symbol value. */
3833 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3834 + htab
->elf
.sgotplt
->output_offset
;
3835 unresolved_reloc
= FALSE
;
3839 /* Relocation is to the entry for this symbol in the
3840 procedure linkage table. */
3842 /* Resolve a PLT32 reloc against a local symbol directly,
3843 without using the procedure linkage table. */
3847 eh
= (struct elf_i386_link_hash_entry
*) h
;
3848 if ((h
->plt
.offset
== (bfd_vma
) -1
3849 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3850 || htab
->elf
.splt
== NULL
)
3852 /* We didn't make a PLT entry for this symbol. This
3853 happens when statically linking PIC code, or when
3854 using -Bsymbolic. */
3858 if (h
->plt
.offset
!= (bfd_vma
) -1)
3860 resolved_plt
= htab
->elf
.splt
;
3861 plt_offset
= h
->plt
.offset
;
3865 resolved_plt
= htab
->plt_got
;
3866 plt_offset
= eh
->plt_got
.offset
;
3869 relocation
= (resolved_plt
->output_section
->vma
3870 + resolved_plt
->output_offset
3872 unresolved_reloc
= FALSE
;
3876 /* Set to symbol size. */
3877 relocation
= st_size
;
3882 if ((input_section
->flags
& SEC_ALLOC
) == 0
3888 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3889 || h
->root
.type
!= bfd_link_hash_undefweak
)
3890 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3891 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3892 || (ELIMINATE_COPY_RELOCS
3899 || h
->root
.type
== bfd_link_hash_undefweak
3900 || h
->root
.type
== bfd_link_hash_undefined
)))
3902 Elf_Internal_Rela outrel
;
3903 bfd_boolean skip
, relocate
;
3906 /* When generating a shared object, these relocations
3907 are copied into the output file to be resolved at run
3914 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3916 if (outrel
.r_offset
== (bfd_vma
) -1)
3918 else if (outrel
.r_offset
== (bfd_vma
) -2)
3919 skip
= TRUE
, relocate
= TRUE
;
3920 outrel
.r_offset
+= (input_section
->output_section
->vma
3921 + input_section
->output_offset
);
3924 memset (&outrel
, 0, sizeof outrel
);
3927 && (r_type
== R_386_PC32
3929 || !SYMBOLIC_BIND (info
, h
)
3930 || !h
->def_regular
))
3931 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3934 /* This symbol is local, or marked to become local. */
3936 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3939 sreloc
= elf_section_data (input_section
)->sreloc
;
3941 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3943 r
= bfd_reloc_notsupported
;
3944 goto check_relocation_error
;
3947 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3949 /* If this reloc is against an external symbol, we do
3950 not want to fiddle with the addend. Otherwise, we
3951 need to include the symbol value so that it becomes
3952 an addend for the dynamic reloc. */
3959 if (!info
->executable
)
3961 Elf_Internal_Rela outrel
;
3964 outrel
.r_offset
= rel
->r_offset
3965 + input_section
->output_section
->vma
3966 + input_section
->output_offset
;
3967 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3968 sreloc
= elf_section_data (input_section
)->sreloc
;
3971 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3976 case R_386_TLS_GOTDESC
:
3977 case R_386_TLS_DESC_CALL
:
3978 case R_386_TLS_IE_32
:
3979 case R_386_TLS_GOTIE
:
3980 tls_type
= GOT_UNKNOWN
;
3981 if (h
== NULL
&& local_got_offsets
)
3982 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3984 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3985 if (tls_type
== GOT_TLS_IE
)
3986 tls_type
= GOT_TLS_IE_NEG
;
3988 if (! elf_i386_tls_transition (info
, input_bfd
,
3989 input_section
, contents
,
3990 symtab_hdr
, sym_hashes
,
3991 &r_type
, tls_type
, rel
,
3992 relend
, h
, r_symndx
))
3995 if (r_type
== R_386_TLS_LE_32
)
3997 BFD_ASSERT (! unresolved_reloc
);
3998 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4003 /* GD->LE transition. */
4004 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4007 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4009 movl %gs:0, %eax; subl $foo@tpoff, %eax
4010 (6 byte form of subl). */
4011 memcpy (contents
+ rel
->r_offset
- 3,
4012 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4013 roff
= rel
->r_offset
+ 5;
4017 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4019 movl %gs:0, %eax; subl $foo@tpoff, %eax
4020 (6 byte form of subl). */
4021 memcpy (contents
+ rel
->r_offset
- 2,
4022 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4023 roff
= rel
->r_offset
+ 6;
4025 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4027 /* Skip R_386_PC32/R_386_PLT32. */
4031 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4033 /* GDesc -> LE transition.
4034 It's originally something like:
4035 leal x@tlsdesc(%ebx), %eax
4039 Registers other than %eax may be set up here. */
4044 roff
= rel
->r_offset
;
4045 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4047 /* Now modify the instruction as appropriate. */
4048 /* aoliva FIXME: remove the above and xor the byte
4050 bfd_put_8 (output_bfd
, val
^ 0x86,
4051 contents
+ roff
- 1);
4052 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4056 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4058 /* GDesc -> LE transition.
4066 roff
= rel
->r_offset
;
4067 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4068 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4071 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4075 /* IE->LE transition:
4076 Originally it can be one of:
4084 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4087 /* movl foo, %eax. */
4088 bfd_put_8 (output_bfd
, 0xb8,
4089 contents
+ rel
->r_offset
- 1);
4095 type
= bfd_get_8 (input_bfd
,
4096 contents
+ rel
->r_offset
- 2);
4101 bfd_put_8 (output_bfd
, 0xc7,
4102 contents
+ rel
->r_offset
- 2);
4103 bfd_put_8 (output_bfd
,
4104 0xc0 | ((val
>> 3) & 7),
4105 contents
+ rel
->r_offset
- 1);
4109 bfd_put_8 (output_bfd
, 0x81,
4110 contents
+ rel
->r_offset
- 2);
4111 bfd_put_8 (output_bfd
,
4112 0xc0 | ((val
>> 3) & 7),
4113 contents
+ rel
->r_offset
- 1);
4120 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4121 contents
+ rel
->r_offset
);
4126 unsigned int val
, type
;
4128 /* {IE_32,GOTIE}->LE transition:
4129 Originally it can be one of:
4130 subl foo(%reg1), %reg2
4131 movl foo(%reg1), %reg2
4132 addl foo(%reg1), %reg2
4135 movl $foo, %reg2 (6 byte form)
4136 addl $foo, %reg2. */
4137 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4138 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4142 bfd_put_8 (output_bfd
, 0xc7,
4143 contents
+ rel
->r_offset
- 2);
4144 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4145 contents
+ rel
->r_offset
- 1);
4147 else if (type
== 0x2b)
4150 bfd_put_8 (output_bfd
, 0x81,
4151 contents
+ rel
->r_offset
- 2);
4152 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4153 contents
+ rel
->r_offset
- 1);
4155 else if (type
== 0x03)
4158 bfd_put_8 (output_bfd
, 0x81,
4159 contents
+ rel
->r_offset
- 2);
4160 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4161 contents
+ rel
->r_offset
- 1);
4165 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4166 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4167 contents
+ rel
->r_offset
);
4169 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4170 contents
+ rel
->r_offset
);
4175 if (htab
->elf
.sgot
== NULL
)
4180 off
= h
->got
.offset
;
4181 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4185 if (local_got_offsets
== NULL
)
4188 off
= local_got_offsets
[r_symndx
];
4189 offplt
= local_tlsdesc_gotents
[r_symndx
];
4196 Elf_Internal_Rela outrel
;
4200 if (htab
->elf
.srelgot
== NULL
)
4203 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4205 if (GOT_TLS_GDESC_P (tls_type
))
4208 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4209 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4210 <= htab
->elf
.sgotplt
->size
);
4211 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4212 + htab
->elf
.sgotplt
->output_offset
4214 + htab
->sgotplt_jump_table_size
);
4215 sreloc
= htab
->elf
.srelplt
;
4216 loc
= sreloc
->contents
;
4217 loc
+= (htab
->next_tls_desc_index
++
4218 * sizeof (Elf32_External_Rel
));
4219 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4220 <= sreloc
->contents
+ sreloc
->size
);
4221 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4224 BFD_ASSERT (! unresolved_reloc
);
4225 bfd_put_32 (output_bfd
,
4226 relocation
- elf_i386_dtpoff_base (info
),
4227 htab
->elf
.sgotplt
->contents
+ offplt
4228 + htab
->sgotplt_jump_table_size
+ 4);
4232 bfd_put_32 (output_bfd
, 0,
4233 htab
->elf
.sgotplt
->contents
+ offplt
4234 + htab
->sgotplt_jump_table_size
+ 4);
4238 sreloc
= htab
->elf
.srelgot
;
4240 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4241 + htab
->elf
.sgot
->output_offset
+ off
);
4243 if (GOT_TLS_GD_P (tls_type
))
4244 dr_type
= R_386_TLS_DTPMOD32
;
4245 else if (GOT_TLS_GDESC_P (tls_type
))
4247 else if (tls_type
== GOT_TLS_IE_POS
)
4248 dr_type
= R_386_TLS_TPOFF
;
4250 dr_type
= R_386_TLS_TPOFF32
;
4252 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4253 bfd_put_32 (output_bfd
,
4254 relocation
- elf_i386_dtpoff_base (info
),
4255 htab
->elf
.sgot
->contents
+ off
);
4256 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4257 bfd_put_32 (output_bfd
,
4258 elf_i386_dtpoff_base (info
) - relocation
,
4259 htab
->elf
.sgot
->contents
+ off
);
4260 else if (dr_type
!= R_386_TLS_DESC
)
4261 bfd_put_32 (output_bfd
, 0,
4262 htab
->elf
.sgot
->contents
+ off
);
4263 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4265 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4267 if (GOT_TLS_GD_P (tls_type
))
4271 BFD_ASSERT (! unresolved_reloc
);
4272 bfd_put_32 (output_bfd
,
4273 relocation
- elf_i386_dtpoff_base (info
),
4274 htab
->elf
.sgot
->contents
+ off
+ 4);
4278 bfd_put_32 (output_bfd
, 0,
4279 htab
->elf
.sgot
->contents
+ off
+ 4);
4280 outrel
.r_info
= ELF32_R_INFO (indx
,
4281 R_386_TLS_DTPOFF32
);
4282 outrel
.r_offset
+= 4;
4283 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4286 else if (tls_type
== GOT_TLS_IE_BOTH
)
4288 bfd_put_32 (output_bfd
,
4290 ? relocation
- elf_i386_dtpoff_base (info
)
4292 htab
->elf
.sgot
->contents
+ off
+ 4);
4293 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4294 outrel
.r_offset
+= 4;
4295 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4302 local_got_offsets
[r_symndx
] |= 1;
4305 if (off
>= (bfd_vma
) -2
4306 && ! GOT_TLS_GDESC_P (tls_type
))
4308 if (r_type
== R_386_TLS_GOTDESC
4309 || r_type
== R_386_TLS_DESC_CALL
)
4311 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4312 unresolved_reloc
= FALSE
;
4314 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4316 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4317 + htab
->elf
.sgotplt
->output_offset
;
4318 relocation
= htab
->elf
.sgot
->output_section
->vma
4319 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4320 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4321 && tls_type
== GOT_TLS_IE_BOTH
)
4323 if (r_type
== R_386_TLS_IE
)
4324 relocation
+= g_o_t
;
4325 unresolved_reloc
= FALSE
;
4327 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4329 unsigned int val
, type
;
4332 /* GD->IE transition. */
4333 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4334 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4337 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4339 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4341 roff
= rel
->r_offset
- 3;
4345 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4347 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4348 roff
= rel
->r_offset
- 2;
4350 memcpy (contents
+ roff
,
4351 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4352 contents
[roff
+ 7] = 0x80 | (val
& 7);
4353 /* If foo is used only with foo@gotntpoff(%reg) and
4354 foo@indntpoff, but not with foo@gottpoff(%reg), change
4355 subl $foo@gottpoff(%reg), %eax
4357 addl $foo@gotntpoff(%reg), %eax. */
4358 if (tls_type
== GOT_TLS_IE_POS
)
4359 contents
[roff
+ 6] = 0x03;
4360 bfd_put_32 (output_bfd
,
4361 htab
->elf
.sgot
->output_section
->vma
4362 + htab
->elf
.sgot
->output_offset
+ off
4363 - htab
->elf
.sgotplt
->output_section
->vma
4364 - htab
->elf
.sgotplt
->output_offset
,
4365 contents
+ roff
+ 8);
4366 /* Skip R_386_PLT32. */
4370 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4372 /* GDesc -> IE transition.
4373 It's originally something like:
4374 leal x@tlsdesc(%ebx), %eax
4377 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4379 movl x@gottpoff(%ebx), %eax # before negl %eax
4381 Registers other than %eax may be set up here. */
4385 /* First, make sure it's a leal adding ebx to a 32-bit
4386 offset into any register, although it's probably
4387 almost always going to be eax. */
4388 roff
= rel
->r_offset
;
4390 /* Now modify the instruction as appropriate. */
4391 /* To turn a leal into a movl in the form we use it, it
4392 suffices to change the first byte from 0x8d to 0x8b.
4393 aoliva FIXME: should we decide to keep the leal, all
4394 we have to do is remove the statement below, and
4395 adjust the relaxation of R_386_TLS_DESC_CALL. */
4396 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4398 if (tls_type
== GOT_TLS_IE_BOTH
)
4401 bfd_put_32 (output_bfd
,
4402 htab
->elf
.sgot
->output_section
->vma
4403 + htab
->elf
.sgot
->output_offset
+ off
4404 - htab
->elf
.sgotplt
->output_section
->vma
4405 - htab
->elf
.sgotplt
->output_offset
,
4409 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4411 /* GDesc -> IE transition.
4419 depending on how we transformed the TLS_GOTDESC above.
4424 roff
= rel
->r_offset
;
4426 /* Now modify the instruction as appropriate. */
4427 if (tls_type
!= GOT_TLS_IE_NEG
)
4430 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4431 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4436 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4437 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4447 if (! elf_i386_tls_transition (info
, input_bfd
,
4448 input_section
, contents
,
4449 symtab_hdr
, sym_hashes
,
4450 &r_type
, GOT_UNKNOWN
, rel
,
4451 relend
, h
, r_symndx
))
4454 if (r_type
!= R_386_TLS_LDM
)
4456 /* LD->LE transition:
4457 leal foo(%reg), %eax; call ___tls_get_addr.
4459 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4460 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4461 memcpy (contents
+ rel
->r_offset
- 2,
4462 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4463 /* Skip R_386_PC32/R_386_PLT32. */
4468 if (htab
->elf
.sgot
== NULL
)
4471 off
= htab
->tls_ldm_got
.offset
;
4476 Elf_Internal_Rela outrel
;
4478 if (htab
->elf
.srelgot
== NULL
)
4481 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4482 + htab
->elf
.sgot
->output_offset
+ off
);
4484 bfd_put_32 (output_bfd
, 0,
4485 htab
->elf
.sgot
->contents
+ off
);
4486 bfd_put_32 (output_bfd
, 0,
4487 htab
->elf
.sgot
->contents
+ off
+ 4);
4488 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4489 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4490 htab
->tls_ldm_got
.offset
|= 1;
4492 relocation
= htab
->elf
.sgot
->output_section
->vma
4493 + htab
->elf
.sgot
->output_offset
+ off
4494 - htab
->elf
.sgotplt
->output_section
->vma
4495 - htab
->elf
.sgotplt
->output_offset
;
4496 unresolved_reloc
= FALSE
;
4499 case R_386_TLS_LDO_32
:
4500 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4501 relocation
-= elf_i386_dtpoff_base (info
);
4503 /* When converting LDO to LE, we must negate. */
4504 relocation
= -elf_i386_tpoff (info
, relocation
);
4507 case R_386_TLS_LE_32
:
4509 if (!info
->executable
)
4511 Elf_Internal_Rela outrel
;
4514 outrel
.r_offset
= rel
->r_offset
4515 + input_section
->output_section
->vma
4516 + input_section
->output_offset
;
4517 if (h
!= NULL
&& h
->dynindx
!= -1)
4521 if (r_type
== R_386_TLS_LE_32
)
4522 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4524 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4525 sreloc
= elf_section_data (input_section
)->sreloc
;
4528 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4531 else if (r_type
== R_386_TLS_LE_32
)
4532 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4534 relocation
-= elf_i386_dtpoff_base (info
);
4536 else if (r_type
== R_386_TLS_LE_32
)
4537 relocation
= elf_i386_tpoff (info
, relocation
);
4539 relocation
= -elf_i386_tpoff (info
, relocation
);
4546 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4547 because such sections are not SEC_ALLOC and thus ld.so will
4548 not process them. */
4549 if (unresolved_reloc
4550 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4552 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4553 rel
->r_offset
) != (bfd_vma
) -1)
4555 (*_bfd_error_handler
)
4556 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4559 (long) rel
->r_offset
,
4561 h
->root
.root
.string
);
4566 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4567 contents
, rel
->r_offset
,
4570 check_relocation_error
:
4571 if (r
!= bfd_reloc_ok
)
4576 name
= h
->root
.root
.string
;
4579 name
= bfd_elf_string_from_elf_section (input_bfd
,
4580 symtab_hdr
->sh_link
,
4585 name
= bfd_section_name (input_bfd
, sec
);
4588 if (r
== bfd_reloc_overflow
)
4590 if (! ((*info
->callbacks
->reloc_overflow
)
4591 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4592 (bfd_vma
) 0, input_bfd
, input_section
,
4598 (*_bfd_error_handler
)
4599 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4600 input_bfd
, input_section
,
4601 (long) rel
->r_offset
, name
, (int) r
);
4610 /* Finish up dynamic symbol handling. We set the contents of various
4611 dynamic sections here. */
4614 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4615 struct bfd_link_info
*info
,
4616 struct elf_link_hash_entry
*h
,
4617 Elf_Internal_Sym
*sym
)
4619 struct elf_i386_link_hash_table
*htab
;
4620 unsigned plt_entry_size
;
4621 const struct elf_i386_backend_data
*abed
;
4622 struct elf_i386_link_hash_entry
*eh
;
4624 htab
= elf_i386_hash_table (info
);
4628 abed
= get_elf_i386_backend_data (output_bfd
);
4629 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4631 eh
= (struct elf_i386_link_hash_entry
*) h
;
4633 if (h
->plt
.offset
!= (bfd_vma
) -1)
4637 Elf_Internal_Rela rel
;
4639 asection
*plt
, *gotplt
, *relplt
;
4641 /* When building a static executable, use .iplt, .igot.plt and
4642 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4643 if (htab
->elf
.splt
!= NULL
)
4645 plt
= htab
->elf
.splt
;
4646 gotplt
= htab
->elf
.sgotplt
;
4647 relplt
= htab
->elf
.srelplt
;
4651 plt
= htab
->elf
.iplt
;
4652 gotplt
= htab
->elf
.igotplt
;
4653 relplt
= htab
->elf
.irelplt
;
4656 /* This symbol has an entry in the procedure linkage table. Set
4659 if ((h
->dynindx
== -1
4660 && !((h
->forced_local
|| info
->executable
)
4662 && h
->type
== STT_GNU_IFUNC
))
4668 /* Get the index in the procedure linkage table which
4669 corresponds to this symbol. This is the index of this symbol
4670 in all the symbols for which we are making plt entries. The
4671 first entry in the procedure linkage table is reserved.
4673 Get the offset into the .got table of the entry that
4674 corresponds to this function. Each .got entry is 4 bytes.
4675 The first three are reserved.
4677 For static executables, we don't reserve anything. */
4679 if (plt
== htab
->elf
.splt
)
4681 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4682 got_offset
= (got_offset
+ 3) * 4;
4686 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4687 got_offset
= got_offset
* 4;
4690 /* Fill in the entry in the procedure linkage table. */
4693 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4694 abed
->plt
->plt_entry_size
);
4695 bfd_put_32 (output_bfd
,
4696 (gotplt
->output_section
->vma
4697 + gotplt
->output_offset
4699 plt
->contents
+ h
->plt
.offset
4700 + abed
->plt
->plt_got_offset
);
4702 if (abed
->is_vxworks
)
4704 int s
, k
, reloc_index
;
4706 /* Create the R_386_32 relocation referencing the GOT
4707 for this PLT entry. */
4709 /* S: Current slot number (zero-based). */
4710 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4711 / abed
->plt
->plt_entry_size
);
4712 /* K: Number of relocations for PLTResolve. */
4714 k
= PLTRESOLVE_RELOCS_SHLIB
;
4716 k
= PLTRESOLVE_RELOCS
;
4717 /* Skip the PLTresolve relocations, and the relocations for
4718 the other PLT slots. */
4719 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4720 loc
= (htab
->srelplt2
->contents
+ reloc_index
4721 * sizeof (Elf32_External_Rel
));
4723 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4724 + htab
->elf
.splt
->output_offset
4725 + h
->plt
.offset
+ 2),
4726 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4727 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4729 /* Create the R_386_32 relocation referencing the beginning of
4730 the PLT for this GOT entry. */
4731 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4732 + htab
->elf
.sgotplt
->output_offset
4734 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4735 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4736 loc
+ sizeof (Elf32_External_Rel
));
4741 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4742 abed
->plt
->plt_entry_size
);
4743 bfd_put_32 (output_bfd
, got_offset
,
4744 plt
->contents
+ h
->plt
.offset
4745 + abed
->plt
->plt_got_offset
);
4748 /* Fill in the entry in the global offset table. */
4749 bfd_put_32 (output_bfd
,
4750 (plt
->output_section
->vma
4751 + plt
->output_offset
4753 + abed
->plt
->plt_lazy_offset
),
4754 gotplt
->contents
+ got_offset
);
4756 /* Fill in the entry in the .rel.plt section. */
4757 rel
.r_offset
= (gotplt
->output_section
->vma
4758 + gotplt
->output_offset
4760 if (h
->dynindx
== -1
4761 || ((info
->executable
4762 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4764 && h
->type
== STT_GNU_IFUNC
))
4766 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4767 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4768 in the .got.plt section. */
4769 bfd_put_32 (output_bfd
,
4770 (h
->root
.u
.def
.value
4771 + h
->root
.u
.def
.section
->output_section
->vma
4772 + h
->root
.u
.def
.section
->output_offset
),
4773 gotplt
->contents
+ got_offset
);
4774 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4775 /* R_386_IRELATIVE comes last. */
4776 plt_index
= htab
->next_irelative_index
--;
4780 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4781 plt_index
= htab
->next_jump_slot_index
++;
4783 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4784 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4786 /* Don't fill PLT entry for static executables. */
4787 if (plt
== htab
->elf
.splt
)
4789 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4790 plt
->contents
+ h
->plt
.offset
4791 + abed
->plt
->plt_reloc_offset
);
4792 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4793 + abed
->plt
->plt_plt_offset
+ 4),
4794 plt
->contents
+ h
->plt
.offset
4795 + abed
->plt
->plt_plt_offset
);
4798 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4800 bfd_vma got_offset
, plt_offset
;
4801 asection
*plt
, *got
, *gotplt
;
4802 const bfd_byte
*got_plt_entry
;
4804 /* Offset of displacement of the indirect jump. */
4805 bfd_vma plt_got_offset
= 2;
4807 /* Set the entry in the GOT procedure linkage table. */
4808 plt
= htab
->plt_got
;
4809 got
= htab
->elf
.sgot
;
4810 gotplt
= htab
->elf
.sgotplt
;
4811 got_offset
= h
->got
.offset
;
4813 if (got_offset
== (bfd_vma
) -1
4819 /* Fill in the entry in the GOT procedure linkage table. */
4822 got_plt_entry
= elf_i386_got_plt_entry
;
4823 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4827 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4828 got_offset
+= (got
->output_section
->vma
4829 + got
->output_offset
4830 - gotplt
->output_section
->vma
4831 - gotplt
->output_offset
);
4834 plt_offset
= eh
->plt_got
.offset
;
4835 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4836 sizeof (elf_i386_got_plt_entry
));
4837 bfd_put_32 (output_bfd
, got_offset
,
4838 plt
->contents
+ plt_offset
+ plt_got_offset
);
4842 && (h
->plt
.offset
!= (bfd_vma
) -1
4843 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4845 /* Mark the symbol as undefined, rather than as defined in
4846 the .plt section. Leave the value if there were any
4847 relocations where pointer equality matters (this is a clue
4848 for the dynamic linker, to make function pointer
4849 comparisons work between an application and shared
4850 library), otherwise set it to zero. If a function is only
4851 called from a binary, there is no need to slow down
4852 shared libraries because of that. */
4853 sym
->st_shndx
= SHN_UNDEF
;
4854 if (!h
->pointer_equality_needed
)
4858 if (h
->got
.offset
!= (bfd_vma
) -1
4859 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4860 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4862 Elf_Internal_Rela rel
;
4864 /* This symbol has an entry in the global offset table. Set it
4867 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4870 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4871 + htab
->elf
.sgot
->output_offset
4872 + (h
->got
.offset
& ~(bfd_vma
) 1));
4874 /* If this is a static link, or it is a -Bsymbolic link and the
4875 symbol is defined locally or was forced to be local because
4876 of a version file, we just want to emit a RELATIVE reloc.
4877 The entry in the global offset table will already have been
4878 initialized in the relocate_section function. */
4880 && h
->type
== STT_GNU_IFUNC
)
4884 /* Generate R_386_GLOB_DAT. */
4891 if (!h
->pointer_equality_needed
)
4894 /* For non-shared object, we can't use .got.plt, which
4895 contains the real function addres if we need pointer
4896 equality. We load the GOT entry with the PLT entry. */
4897 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4898 bfd_put_32 (output_bfd
,
4899 (plt
->output_section
->vma
4900 + plt
->output_offset
+ h
->plt
.offset
),
4901 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4905 else if (info
->shared
4906 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4908 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4909 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4913 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4915 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4916 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4917 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4920 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4925 Elf_Internal_Rela rel
;
4927 /* This symbol needs a copy reloc. Set it up. */
4929 if (h
->dynindx
== -1
4930 || (h
->root
.type
!= bfd_link_hash_defined
4931 && h
->root
.type
!= bfd_link_hash_defweak
)
4932 || htab
->srelbss
== NULL
)
4935 rel
.r_offset
= (h
->root
.u
.def
.value
4936 + h
->root
.u
.def
.section
->output_section
->vma
4937 + h
->root
.u
.def
.section
->output_offset
);
4938 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4939 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4945 /* Finish up local dynamic symbol handling. We set the contents of
4946 various dynamic sections here. */
4949 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4951 struct elf_link_hash_entry
*h
4952 = (struct elf_link_hash_entry
*) *slot
;
4953 struct bfd_link_info
*info
4954 = (struct bfd_link_info
*) inf
;
4956 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4960 /* Used to decide how to sort relocs in an optimal manner for the
4961 dynamic linker, before writing them out. */
4963 static enum elf_reloc_type_class
4964 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4965 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4966 const Elf_Internal_Rela
*rela
)
4968 switch (ELF32_R_TYPE (rela
->r_info
))
4970 case R_386_RELATIVE
:
4971 return reloc_class_relative
;
4972 case R_386_JUMP_SLOT
:
4973 return reloc_class_plt
;
4975 return reloc_class_copy
;
4977 return reloc_class_normal
;
4981 /* Finish up the dynamic sections. */
4984 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4985 struct bfd_link_info
*info
)
4987 struct elf_i386_link_hash_table
*htab
;
4990 const struct elf_i386_backend_data
*abed
;
4992 htab
= elf_i386_hash_table (info
);
4996 dynobj
= htab
->elf
.dynobj
;
4997 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4998 abed
= get_elf_i386_backend_data (output_bfd
);
5000 if (htab
->elf
.dynamic_sections_created
)
5002 Elf32_External_Dyn
*dyncon
, *dynconend
;
5004 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5007 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5008 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5009 for (; dyncon
< dynconend
; dyncon
++)
5011 Elf_Internal_Dyn dyn
;
5014 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5019 if (abed
->is_vxworks
5020 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5025 s
= htab
->elf
.sgotplt
;
5026 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5030 s
= htab
->elf
.srelplt
;
5031 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5035 s
= htab
->elf
.srelplt
;
5036 dyn
.d_un
.d_val
= s
->size
;
5040 /* My reading of the SVR4 ABI indicates that the
5041 procedure linkage table relocs (DT_JMPREL) should be
5042 included in the overall relocs (DT_REL). This is
5043 what Solaris does. However, UnixWare can not handle
5044 that case. Therefore, we override the DT_RELSZ entry
5045 here to make it not include the JMPREL relocs. */
5046 s
= htab
->elf
.srelplt
;
5049 dyn
.d_un
.d_val
-= s
->size
;
5053 /* We may not be using the standard ELF linker script.
5054 If .rel.plt is the first .rel section, we adjust
5055 DT_REL to not include it. */
5056 s
= htab
->elf
.srelplt
;
5059 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5061 dyn
.d_un
.d_ptr
+= s
->size
;
5065 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5068 /* Fill in the first entry in the procedure linkage table. */
5069 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5073 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5074 abed
->plt
->plt0_entry_size
);
5075 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5076 abed
->plt0_pad_byte
,
5077 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5081 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5082 abed
->plt
->plt0_entry_size
);
5083 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5084 abed
->plt0_pad_byte
,
5085 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5086 bfd_put_32 (output_bfd
,
5087 (htab
->elf
.sgotplt
->output_section
->vma
5088 + htab
->elf
.sgotplt
->output_offset
5090 htab
->elf
.splt
->contents
5091 + abed
->plt
->plt0_got1_offset
);
5092 bfd_put_32 (output_bfd
,
5093 (htab
->elf
.sgotplt
->output_section
->vma
5094 + htab
->elf
.sgotplt
->output_offset
5096 htab
->elf
.splt
->contents
5097 + abed
->plt
->plt0_got2_offset
);
5099 if (abed
->is_vxworks
)
5101 Elf_Internal_Rela rel
;
5103 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5104 On IA32 we use REL relocations so the addend goes in
5105 the PLT directly. */
5106 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5107 + htab
->elf
.splt
->output_offset
5108 + abed
->plt
->plt0_got1_offset
);
5109 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5110 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5111 htab
->srelplt2
->contents
);
5112 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5113 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5114 + htab
->elf
.splt
->output_offset
5115 + abed
->plt
->plt0_got2_offset
);
5116 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5117 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5118 htab
->srelplt2
->contents
+
5119 sizeof (Elf32_External_Rel
));
5123 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5124 really seem like the right value. */
5125 elf_section_data (htab
->elf
.splt
->output_section
)
5126 ->this_hdr
.sh_entsize
= 4;
5128 /* Correct the .rel.plt.unloaded relocations. */
5129 if (abed
->is_vxworks
&& !info
->shared
)
5131 int num_plts
= (htab
->elf
.splt
->size
5132 / abed
->plt
->plt_entry_size
) - 1;
5135 p
= htab
->srelplt2
->contents
;
5137 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5139 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5141 for (; num_plts
; num_plts
--)
5143 Elf_Internal_Rela rel
;
5144 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5145 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5146 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5147 p
+= sizeof (Elf32_External_Rel
);
5149 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5150 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5151 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5152 p
+= sizeof (Elf32_External_Rel
);
5158 if (htab
->elf
.sgotplt
)
5160 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5162 (*_bfd_error_handler
)
5163 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5167 /* Fill in the first three entries in the global offset table. */
5168 if (htab
->elf
.sgotplt
->size
> 0)
5170 bfd_put_32 (output_bfd
,
5172 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5173 htab
->elf
.sgotplt
->contents
);
5174 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5175 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5178 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5181 /* Adjust .eh_frame for .plt section. */
5182 if (htab
->plt_eh_frame
!= NULL
5183 && htab
->plt_eh_frame
->contents
!= NULL
)
5185 if (htab
->elf
.splt
!= NULL
5186 && htab
->elf
.splt
->size
!= 0
5187 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5188 && htab
->elf
.splt
->output_section
!= NULL
5189 && htab
->plt_eh_frame
->output_section
!= NULL
)
5191 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5192 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5193 + htab
->plt_eh_frame
->output_offset
5194 + PLT_FDE_START_OFFSET
;
5195 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5196 htab
->plt_eh_frame
->contents
5197 + PLT_FDE_START_OFFSET
);
5199 if (htab
->plt_eh_frame
->sec_info_type
5200 == SEC_INFO_TYPE_EH_FRAME
)
5202 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5204 htab
->plt_eh_frame
->contents
))
5209 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5210 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5212 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5213 htab_traverse (htab
->loc_hash_table
,
5214 elf_i386_finish_local_dynamic_symbol
,
5220 /* Return an array of PLT entry symbol values. */
5223 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5226 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5229 bfd_vma
*plt_sym_val
;
5231 bfd_byte
*plt_contents
;
5232 const struct elf_i386_backend_data
*bed
5233 = get_elf_i386_backend_data (abfd
);
5234 Elf_Internal_Shdr
*hdr
;
5236 /* Get the .plt section contents. */
5237 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5238 if (plt_contents
== NULL
)
5240 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5241 plt_contents
, 0, plt
->size
))
5244 free (plt_contents
);
5248 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5249 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5252 hdr
= &elf_section_data (relplt
)->this_hdr
;
5253 count
= relplt
->size
/ hdr
->sh_entsize
;
5255 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5256 if (plt_sym_val
== NULL
)
5259 for (i
= 0; i
< count
; i
++)
5260 plt_sym_val
[i
] = -1;
5262 plt_offset
= bed
->plt
->plt_entry_size
;
5263 p
= relplt
->relocation
;
5264 for (i
= 0; i
< count
; i
++, p
++)
5268 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5269 if (p
->howto
== NULL
)
5272 if (p
->howto
->type
!= R_386_JUMP_SLOT
5273 && p
->howto
->type
!= R_386_IRELATIVE
)
5276 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5277 + bed
->plt
->plt_reloc_offset
));
5278 reloc_index
/= sizeof (Elf32_External_Rel
);
5279 if (reloc_index
>= count
)
5281 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5282 plt_offset
+= bed
->plt
->plt_entry_size
;
5284 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5286 if (plt_offset
>= plt
->size
)
5290 free (plt_contents
);
5295 /* Similar to _bfd_elf_get_synthetic_symtab. */
5298 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5305 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5306 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5307 dynsymcount
, dynsyms
, ret
,
5309 elf_i386_get_plt_sym_val
);
5312 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5315 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5317 if (h
->plt
.offset
!= (bfd_vma
) -1
5319 && !h
->pointer_equality_needed
)
5322 return _bfd_elf_hash_symbol (h
);
5325 /* Hook called by the linker routine which adds symbols from an object
5329 elf_i386_add_symbol_hook (bfd
* abfd
,
5330 struct bfd_link_info
* info
,
5331 Elf_Internal_Sym
* sym
,
5332 const char ** namep ATTRIBUTE_UNUSED
,
5333 flagword
* flagsp ATTRIBUTE_UNUSED
,
5334 asection
** secp ATTRIBUTE_UNUSED
,
5335 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5337 if (ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
5338 && (abfd
->flags
& DYNAMIC
) == 0
5339 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5340 elf_tdata (info
->output_bfd
)->has_gnu_symbols
5341 |= elf_gnu_symbol_unique
;
5346 #define TARGET_LITTLE_SYM i386_elf32_vec
5347 #define TARGET_LITTLE_NAME "elf32-i386"
5348 #define ELF_ARCH bfd_arch_i386
5349 #define ELF_TARGET_ID I386_ELF_DATA
5350 #define ELF_MACHINE_CODE EM_386
5351 #define ELF_MAXPAGESIZE 0x1000
5353 #define elf_backend_can_gc_sections 1
5354 #define elf_backend_can_refcount 1
5355 #define elf_backend_want_got_plt 1
5356 #define elf_backend_plt_readonly 1
5357 #define elf_backend_want_plt_sym 0
5358 #define elf_backend_got_header_size 12
5359 #define elf_backend_plt_alignment 4
5360 #define elf_backend_extern_protected_data 1
5362 /* Support RELA for objdump of prelink objects. */
5363 #define elf_info_to_howto elf_i386_info_to_howto_rel
5364 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5366 #define bfd_elf32_mkobject elf_i386_mkobject
5368 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5369 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5370 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5371 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5372 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5374 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5375 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5376 #define elf_backend_check_relocs elf_i386_check_relocs
5377 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5378 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5379 #define elf_backend_fake_sections elf_i386_fake_sections
5380 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5381 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5382 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5383 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5384 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5385 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5386 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5387 #define elf_backend_relocate_section elf_i386_relocate_section
5388 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5389 #define elf_backend_always_size_sections elf_i386_always_size_sections
5390 #define elf_backend_omit_section_dynsym \
5391 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5392 #define elf_backend_hash_symbol elf_i386_hash_symbol
5393 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5395 #include "elf32-target.h"
5397 /* FreeBSD support. */
5399 #undef TARGET_LITTLE_SYM
5400 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5401 #undef TARGET_LITTLE_NAME
5402 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5404 #define ELF_OSABI ELFOSABI_FREEBSD
5406 /* The kernel recognizes executables as valid only if they carry a
5407 "FreeBSD" label in the ELF header. So we put this label on all
5408 executables and (for simplicity) also all other object files. */
5411 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5413 _bfd_elf_post_process_headers (abfd
, info
);
5415 #ifdef OLD_FREEBSD_ABI_LABEL
5417 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5418 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5419 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5424 #undef elf_backend_post_process_headers
5425 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5427 #define elf32_bed elf32_i386_fbsd_bed
5429 #undef elf_backend_add_symbol_hook
5431 #include "elf32-target.h"
5435 #undef TARGET_LITTLE_SYM
5436 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5437 #undef TARGET_LITTLE_NAME
5438 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5440 #undef elf_backend_post_process_headers
5442 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5443 objects won't be recognized. */
5447 #define elf32_bed elf32_i386_sol2_bed
5449 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5451 #undef elf_backend_static_tls_alignment
5452 #define elf_backend_static_tls_alignment 8
5454 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5456 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5458 #undef elf_backend_want_plt_sym
5459 #define elf_backend_want_plt_sym 1
5461 #include "elf32-target.h"
5463 /* Intel MCU support. */
5466 elf32_iamcu_elf_object_p (bfd
*abfd
)
5468 /* Set the right machine number for an IAMCU elf32 file. */
5469 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
5473 #undef TARGET_LITTLE_SYM
5474 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5475 #undef TARGET_LITTLE_NAME
5476 #define TARGET_LITTLE_NAME "elf32-iamcu"
5478 #define ELF_ARCH bfd_arch_iamcu
5480 #undef ELF_MACHINE_CODE
5481 #define ELF_MACHINE_CODE EM_IAMCU
5486 #define elf32_bed elf32_iamcu_bed
5488 #undef elf_backend_object_p
5489 #define elf_backend_object_p elf32_iamcu_elf_object_p
5491 #undef elf_backend_static_tls_alignment
5493 #undef elf_backend_want_plt_sym
5494 #define elf_backend_want_plt_sym 0
5496 #include "elf32-target.h"
5498 /* Restore defaults. */
5500 #define ELF_ARCH bfd_arch_i386
5501 #undef ELF_MACHINE_CODE
5502 #define ELF_MACHINE_CODE EM_386
5504 /* Native Client support. */
5506 #undef TARGET_LITTLE_SYM
5507 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5508 #undef TARGET_LITTLE_NAME
5509 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5511 #define elf32_bed elf32_i386_nacl_bed
5513 #undef ELF_MAXPAGESIZE
5514 #define ELF_MAXPAGESIZE 0x10000
5516 /* Restore defaults. */
5518 #undef elf_backend_want_plt_sym
5519 #define elf_backend_want_plt_sym 0
5520 #undef elf_backend_post_process_headers
5521 #undef elf_backend_static_tls_alignment
5523 /* NaCl uses substantially different PLT entries for the same effects. */
5525 #undef elf_backend_plt_alignment
5526 #define elf_backend_plt_alignment 5
5527 #define NACL_PLT_ENTRY_SIZE 64
5528 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5530 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5532 0xff, 0x35, /* pushl contents of address */
5533 0, 0, 0, 0, /* replaced with address of .got + 4. */
5534 0x8b, 0x0d, /* movl contents of address, %ecx */
5535 0, 0, 0, 0, /* replaced with address of .got + 8. */
5536 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5537 0xff, 0xe1 /* jmp *%ecx */
5540 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5542 0x8b, 0x0d, /* movl contents of address, %ecx */
5543 0, 0, 0, 0, /* replaced with GOT slot address. */
5544 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5545 0xff, 0xe1, /* jmp *%ecx */
5547 /* Pad to the next 32-byte boundary with nop instructions. */
5549 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5550 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5552 /* Lazy GOT entries point here (32-byte aligned). */
5553 0x68, /* pushl immediate */
5554 0, 0, 0, 0, /* replaced with reloc offset. */
5555 0xe9, /* jmp relative */
5556 0, 0, 0, 0, /* replaced with offset to .plt. */
5558 /* Pad to the next 32-byte boundary with nop instructions. */
5559 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5560 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5564 static const bfd_byte
5565 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5567 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5568 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5569 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5570 0xff, 0xe1, /* jmp *%ecx */
5572 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5573 so pad to that size with nop instructions. */
5574 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5577 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5579 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5580 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5581 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5582 0xff, 0xe1, /* jmp *%ecx */
5584 /* Pad to the next 32-byte boundary with nop instructions. */
5586 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5587 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5589 /* Lazy GOT entries point here (32-byte aligned). */
5590 0x68, /* pushl immediate */
5591 0, 0, 0, 0, /* replaced with offset into relocation table. */
5592 0xe9, /* jmp relative */
5593 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5595 /* Pad to the next 32-byte boundary with nop instructions. */
5596 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5597 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5601 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5603 #if (PLT_CIE_LENGTH != 20 \
5604 || PLT_FDE_LENGTH != 36 \
5605 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5606 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5607 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5609 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5610 0, 0, 0, 0, /* CIE ID */
5611 1, /* CIE version */
5612 'z', 'R', 0, /* Augmentation string */
5613 1, /* Code alignment factor */
5614 0x7c, /* Data alignment factor: -4 */
5615 8, /* Return address column */
5616 1, /* Augmentation size */
5617 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5618 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5619 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5620 DW_CFA_nop
, DW_CFA_nop
,
5622 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5623 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5624 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5625 0, 0, 0, 0, /* .plt size goes here */
5626 0, /* Augmentation size */
5627 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5628 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5629 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5630 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5631 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5632 13, /* Block length */
5633 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5634 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5635 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5636 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5637 DW_CFA_nop
, DW_CFA_nop
5640 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5642 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5643 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5644 2, /* plt0_got1_offset */
5645 8, /* plt0_got2_offset */
5646 elf_i386_nacl_plt_entry
, /* plt_entry */
5647 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5648 2, /* plt_got_offset */
5649 33, /* plt_reloc_offset */
5650 38, /* plt_plt_offset */
5651 32, /* plt_lazy_offset */
5652 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5653 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5654 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5655 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5658 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5660 &elf_i386_nacl_plt
, /* plt */
5661 0x90, /* plt0_pad_byte: nop insn */
5666 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5668 /* Set the right machine number for a NaCl i386 ELF32 file. */
5669 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5673 #undef elf_backend_arch_data
5674 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5676 #undef elf_backend_object_p
5677 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5678 #undef elf_backend_modify_segment_map
5679 #define elf_backend_modify_segment_map nacl_modify_segment_map
5680 #undef elf_backend_modify_program_headers
5681 #define elf_backend_modify_program_headers nacl_modify_program_headers
5682 #undef elf_backend_final_write_processing
5683 #define elf_backend_final_write_processing nacl_final_write_processing
5685 #include "elf32-target.h"
5687 /* Restore defaults. */
5688 #undef elf_backend_object_p
5689 #undef elf_backend_modify_segment_map
5690 #undef elf_backend_modify_program_headers
5691 #undef elf_backend_final_write_processing
5693 /* VxWorks support. */
5695 #undef TARGET_LITTLE_SYM
5696 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5697 #undef TARGET_LITTLE_NAME
5698 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5700 #undef elf_backend_plt_alignment
5701 #define elf_backend_plt_alignment 4
5703 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5705 &elf_i386_plt
, /* plt */
5706 0x90, /* plt0_pad_byte */
5710 #undef elf_backend_arch_data
5711 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5713 #undef elf_backend_relocs_compatible
5714 #undef elf_backend_add_symbol_hook
5715 #define elf_backend_add_symbol_hook \
5716 elf_vxworks_add_symbol_hook
5717 #undef elf_backend_link_output_symbol_hook
5718 #define elf_backend_link_output_symbol_hook \
5719 elf_vxworks_link_output_symbol_hook
5720 #undef elf_backend_emit_relocs
5721 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5722 #undef elf_backend_final_write_processing
5723 #define elf_backend_final_write_processing \
5724 elf_vxworks_final_write_processing
5725 #undef elf_backend_static_tls_alignment
5727 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5729 #undef elf_backend_want_plt_sym
5730 #define elf_backend_want_plt_sym 1
5733 #define elf32_bed elf32_i386_vxworks_bed
5735 #include "elf32-target.h"