1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2015 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table
[]=
40 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
41 bfd_elf_generic_reloc
, "R_386_NONE",
42 TRUE
, 0x00000000, 0x00000000, FALSE
),
43 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_32",
45 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
46 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_PC32",
48 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
49 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_GOT32",
51 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
52 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_PLT32",
54 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
55 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_COPY",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_RELATIVE",
66 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
67 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_386_GOTOFF",
69 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
70 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
71 bfd_elf_generic_reloc
, "R_386_GOTPC",
72 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_IE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_LE",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_TLS_GD",
96 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
97 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
99 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
100 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_16",
102 TRUE
, 0xffff, 0xffff, FALSE
),
103 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_PC16",
105 TRUE
, 0xffff, 0xffff, TRUE
),
106 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_386_8",
108 TRUE
, 0xff, 0xff, FALSE
),
109 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
110 bfd_elf_generic_reloc
, "R_386_PC8",
111 TRUE
, 0xff, 0xff, TRUE
),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
135 bfd_elf_generic_reloc
, "R_386_SIZE32",
136 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
137 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
139 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
140 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
143 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
146 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
148 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
151 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
152 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
154 /* GNU extension to record C++ vtable hierarchy. */
155 HOWTO (R_386_GNU_VTINHERIT
, /* type */
157 2, /* size (0 = byte, 1 = short, 2 = long) */
159 FALSE
, /* pc_relative */
161 complain_overflow_dont
, /* complain_on_overflow */
162 NULL
, /* special_function */
163 "R_386_GNU_VTINHERIT", /* name */
164 FALSE
, /* partial_inplace */
167 FALSE
), /* pcrel_offset */
169 /* GNU extension to record C++ vtable member usage. */
170 HOWTO (R_386_GNU_VTENTRY
, /* type */
172 2, /* size (0 = byte, 1 = short, 2 = long) */
174 FALSE
, /* pc_relative */
176 complain_overflow_dont
, /* complain_on_overflow */
177 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
178 "R_386_GNU_VTENTRY", /* name */
179 FALSE
, /* partial_inplace */
182 FALSE
) /* pcrel_offset */
184 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
188 #ifdef DEBUG_GEN_RELOC
190 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
195 static reloc_howto_type
*
196 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
197 bfd_reloc_code_real_type code
)
202 TRACE ("BFD_RELOC_NONE");
203 return &elf_howto_table
[R_386_NONE
];
206 TRACE ("BFD_RELOC_32");
207 return &elf_howto_table
[R_386_32
];
210 TRACE ("BFD_RELOC_CTOR");
211 return &elf_howto_table
[R_386_32
];
213 case BFD_RELOC_32_PCREL
:
214 TRACE ("BFD_RELOC_PC32");
215 return &elf_howto_table
[R_386_PC32
];
217 case BFD_RELOC_386_GOT32
:
218 TRACE ("BFD_RELOC_386_GOT32");
219 return &elf_howto_table
[R_386_GOT32
];
221 case BFD_RELOC_386_PLT32
:
222 TRACE ("BFD_RELOC_386_PLT32");
223 return &elf_howto_table
[R_386_PLT32
];
225 case BFD_RELOC_386_COPY
:
226 TRACE ("BFD_RELOC_386_COPY");
227 return &elf_howto_table
[R_386_COPY
];
229 case BFD_RELOC_386_GLOB_DAT
:
230 TRACE ("BFD_RELOC_386_GLOB_DAT");
231 return &elf_howto_table
[R_386_GLOB_DAT
];
233 case BFD_RELOC_386_JUMP_SLOT
:
234 TRACE ("BFD_RELOC_386_JUMP_SLOT");
235 return &elf_howto_table
[R_386_JUMP_SLOT
];
237 case BFD_RELOC_386_RELATIVE
:
238 TRACE ("BFD_RELOC_386_RELATIVE");
239 return &elf_howto_table
[R_386_RELATIVE
];
241 case BFD_RELOC_386_GOTOFF
:
242 TRACE ("BFD_RELOC_386_GOTOFF");
243 return &elf_howto_table
[R_386_GOTOFF
];
245 case BFD_RELOC_386_GOTPC
:
246 TRACE ("BFD_RELOC_386_GOTPC");
247 return &elf_howto_table
[R_386_GOTPC
];
249 /* These relocs are a GNU extension. */
250 case BFD_RELOC_386_TLS_TPOFF
:
251 TRACE ("BFD_RELOC_386_TLS_TPOFF");
252 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
254 case BFD_RELOC_386_TLS_IE
:
255 TRACE ("BFD_RELOC_386_TLS_IE");
256 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_GOTIE
:
259 TRACE ("BFD_RELOC_386_TLS_GOTIE");
260 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_LE
:
263 TRACE ("BFD_RELOC_386_TLS_LE");
264 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_GD
:
267 TRACE ("BFD_RELOC_386_TLS_GD");
268 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_LDM
:
271 TRACE ("BFD_RELOC_386_TLS_LDM");
272 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
275 TRACE ("BFD_RELOC_16");
276 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
278 case BFD_RELOC_16_PCREL
:
279 TRACE ("BFD_RELOC_16_PCREL");
280 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
283 TRACE ("BFD_RELOC_8");
284 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
286 case BFD_RELOC_8_PCREL
:
287 TRACE ("BFD_RELOC_8_PCREL");
288 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
290 /* Common with Sun TLS implementation. */
291 case BFD_RELOC_386_TLS_LDO_32
:
292 TRACE ("BFD_RELOC_386_TLS_LDO_32");
293 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
295 case BFD_RELOC_386_TLS_IE_32
:
296 TRACE ("BFD_RELOC_386_TLS_IE_32");
297 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_LE_32
:
300 TRACE ("BFD_RELOC_386_TLS_LE_32");
301 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_DTPMOD32
:
304 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
305 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPOFF32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
309 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_TPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
313 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_SIZE32
:
316 TRACE ("BFD_RELOC_SIZE32");
317 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
319 case BFD_RELOC_386_TLS_GOTDESC
:
320 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
321 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_DESC_CALL
:
324 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
325 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC
:
328 TRACE ("BFD_RELOC_386_TLS_DESC");
329 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
331 case BFD_RELOC_386_IRELATIVE
:
332 TRACE ("BFD_RELOC_386_IRELATIVE");
333 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
335 case BFD_RELOC_VTABLE_INHERIT
:
336 TRACE ("BFD_RELOC_VTABLE_INHERIT");
337 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
339 case BFD_RELOC_VTABLE_ENTRY
:
340 TRACE ("BFD_RELOC_VTABLE_ENTRY");
341 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
351 static reloc_howto_type
*
352 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
357 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
358 if (elf_howto_table
[i
].name
!= NULL
359 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
360 return &elf_howto_table
[i
];
365 static reloc_howto_type
*
366 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
370 if ((indx
= r_type
) >= R_386_standard
371 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
372 >= R_386_ext
- R_386_standard
)
373 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
374 >= R_386_irelative
- R_386_ext
)
375 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
376 >= R_386_vt
- R_386_irelative
))
378 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
382 /* PR 17512: file: 0f67f69d. */
383 if (elf_howto_table
[indx
].type
!= r_type
)
385 return &elf_howto_table
[indx
];
389 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
391 Elf_Internal_Rela
*dst
)
393 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
394 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
406 if (name
[0] == '.' && name
[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd
, name
);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
420 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
422 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
428 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
431 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
435 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
439 switch (note
->descsz
)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
449 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
461 size
, note
->descpos
+ offset
);
465 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
467 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
469 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
474 elf_tdata (abfd
)->core
->program
475 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
476 elf_tdata (abfd
)->core
->command
477 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
481 switch (note
->descsz
)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd
)->core
->pid
488 = bfd_get_32 (abfd
, note
->descdata
+ 12);
489 elf_tdata (abfd
)->core
->program
490 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
491 elf_tdata (abfd
)->core
->command
492 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command
= elf_tdata (abfd
)->core
->command
;
501 int n
= strlen (command
);
503 if (0 < n
&& command
[n
- 1] == ' ')
504 command
[n
- 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry
[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* Entries in the GOT procedure linkage table look like this. */
587 static const bfd_byte elf_i386_got_plt_entry
[8] =
589 0xff, 0x25, /* jmp indirect */
590 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
591 0x66, 0x90 /* xchg %ax,%ax */
594 /* Entries in the PIC GOT procedure linkage table look like this. */
596 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
598 0xff, 0xa3, /* jmp *offset(%ebx) */
599 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
600 0x66, 0x90 /* xchg %ax,%ax */
603 /* .eh_frame covering the .plt section. */
605 static const bfd_byte elf_i386_eh_frame_plt
[] =
607 #define PLT_CIE_LENGTH 20
608 #define PLT_FDE_LENGTH 36
609 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
610 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
611 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
612 0, 0, 0, 0, /* CIE ID */
614 'z', 'R', 0, /* Augmentation string */
615 1, /* Code alignment factor */
616 0x7c, /* Data alignment factor */
617 8, /* Return address column */
618 1, /* Augmentation size */
619 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
620 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
621 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
622 DW_CFA_nop
, DW_CFA_nop
,
624 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
625 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
626 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
627 0, 0, 0, 0, /* .plt size goes here */
628 0, /* Augmentation size */
629 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
630 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
631 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
632 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
633 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
634 11, /* Block length */
635 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
636 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
637 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
638 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
639 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
642 struct elf_i386_plt_layout
644 /* The first entry in an absolute procedure linkage table looks like this. */
645 const bfd_byte
*plt0_entry
;
646 unsigned int plt0_entry_size
;
648 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
649 unsigned int plt0_got1_offset
;
650 unsigned int plt0_got2_offset
;
652 /* Later entries in an absolute procedure linkage table look like this. */
653 const bfd_byte
*plt_entry
;
654 unsigned int plt_entry_size
;
656 /* Offsets into plt_entry that are to be replaced with... */
657 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
658 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
659 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
661 /* Offset into plt_entry where the initial value of the GOT entry points. */
662 unsigned int plt_lazy_offset
;
664 /* The first entry in a PIC procedure linkage table looks like this. */
665 const bfd_byte
*pic_plt0_entry
;
667 /* Subsequent entries in a PIC procedure linkage table look like this. */
668 const bfd_byte
*pic_plt_entry
;
670 /* .eh_frame covering the .plt section. */
671 const bfd_byte
*eh_frame_plt
;
672 unsigned int eh_frame_plt_size
;
675 #define GET_PLT_ENTRY_SIZE(abfd) \
676 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
678 /* These are the standard parameters. */
679 static const struct elf_i386_plt_layout elf_i386_plt
=
681 elf_i386_plt0_entry
, /* plt0_entry */
682 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
683 2, /* plt0_got1_offset */
684 8, /* plt0_got2_offset */
685 elf_i386_plt_entry
, /* plt_entry */
686 PLT_ENTRY_SIZE
, /* plt_entry_size */
687 2, /* plt_got_offset */
688 7, /* plt_reloc_offset */
689 12, /* plt_plt_offset */
690 6, /* plt_lazy_offset */
691 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
692 elf_i386_pic_plt_entry
, /* pic_plt_entry */
693 elf_i386_eh_frame_plt
, /* eh_frame_plt */
694 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
698 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
699 for the PLTResolve stub and then for each PLT entry. */
700 #define PLTRESOLVE_RELOCS_SHLIB 0
701 #define PLTRESOLVE_RELOCS 2
702 #define PLT_NON_JUMP_SLOT_RELOCS 2
704 /* Architecture-specific backend data for i386. */
706 struct elf_i386_backend_data
708 /* Parameters describing PLT generation. */
709 const struct elf_i386_plt_layout
*plt
;
711 /* Value used to fill the unused bytes of the first PLT entry. */
712 bfd_byte plt0_pad_byte
;
714 /* True if the target system is VxWorks. */
718 #define get_elf_i386_backend_data(abfd) \
719 ((const struct elf_i386_backend_data *) \
720 get_elf_backend_data (abfd)->arch_data)
722 /* These are the standard parameters. */
723 static const struct elf_i386_backend_data elf_i386_arch_bed
=
725 &elf_i386_plt
, /* plt */
726 0, /* plt0_pad_byte */
730 #define elf_backend_arch_data &elf_i386_arch_bed
732 /* i386 ELF linker hash entry. */
734 struct elf_i386_link_hash_entry
736 struct elf_link_hash_entry elf
;
738 /* Track dynamic relocs copied for this symbol. */
739 struct elf_dyn_relocs
*dyn_relocs
;
741 #define GOT_UNKNOWN 0
745 #define GOT_TLS_IE_POS 5
746 #define GOT_TLS_IE_NEG 6
747 #define GOT_TLS_IE_BOTH 7
748 #define GOT_TLS_GDESC 8
749 #define GOT_TLS_GD_BOTH_P(type) \
750 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
751 #define GOT_TLS_GD_P(type) \
752 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
753 #define GOT_TLS_GDESC_P(type) \
754 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
755 #define GOT_TLS_GD_ANY_P(type) \
756 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
757 unsigned char tls_type
;
759 /* Symbol is referenced by R_386_GOTOFF relocation. */
760 unsigned int gotoff_ref
: 1;
762 /* Information about the GOT PLT entry. Filled when there are both
763 GOT and PLT relocations against the same function. */
764 union gotplt_union plt_got
;
766 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
767 starting at the end of the jump table. */
771 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
773 struct elf_i386_obj_tdata
775 struct elf_obj_tdata root
;
777 /* tls_type for each local got entry. */
778 char *local_got_tls_type
;
780 /* GOTPLT entries for TLS descriptors. */
781 bfd_vma
*local_tlsdesc_gotent
;
784 #define elf_i386_tdata(abfd) \
785 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
787 #define elf_i386_local_got_tls_type(abfd) \
788 (elf_i386_tdata (abfd)->local_got_tls_type)
790 #define elf_i386_local_tlsdesc_gotent(abfd) \
791 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
793 #define is_i386_elf(bfd) \
794 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
795 && elf_tdata (bfd) != NULL \
796 && elf_object_id (bfd) == I386_ELF_DATA)
799 elf_i386_mkobject (bfd
*abfd
)
801 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
805 /* i386 ELF linker hash table. */
807 struct elf_i386_link_hash_table
809 struct elf_link_hash_table elf
;
811 /* Short-cuts to get to dynamic linker sections. */
814 asection
*plt_eh_frame
;
819 bfd_signed_vma refcount
;
823 /* The amount of space used by the reserved portion of the sgotplt
824 section, plus whatever space is used by the jump slots. */
825 bfd_vma sgotplt_jump_table_size
;
827 /* Small local sym cache. */
828 struct sym_cache sym_cache
;
830 /* _TLS_MODULE_BASE_ symbol. */
831 struct bfd_link_hash_entry
*tls_module_base
;
833 /* Used by local STT_GNU_IFUNC symbols. */
834 htab_t loc_hash_table
;
835 void * loc_hash_memory
;
837 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
840 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
841 bfd_vma next_tls_desc_index
;
843 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
844 bfd_vma next_jump_slot_index
;
846 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
847 bfd_vma next_irelative_index
;
850 /* Get the i386 ELF linker hash table from a link_info structure. */
852 #define elf_i386_hash_table(p) \
853 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
854 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
856 #define elf_i386_compute_jump_table_size(htab) \
857 ((htab)->elf.srelplt->reloc_count * 4)
859 /* Create an entry in an i386 ELF linker hash table. */
861 static struct bfd_hash_entry
*
862 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
863 struct bfd_hash_table
*table
,
866 /* Allocate the structure if it has not already been allocated by a
870 entry
= (struct bfd_hash_entry
*)
871 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
876 /* Call the allocation method of the superclass. */
877 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
880 struct elf_i386_link_hash_entry
*eh
;
882 eh
= (struct elf_i386_link_hash_entry
*) entry
;
883 eh
->dyn_relocs
= NULL
;
884 eh
->tls_type
= GOT_UNKNOWN
;
886 eh
->plt_got
.offset
= (bfd_vma
) -1;
887 eh
->tlsdesc_got
= (bfd_vma
) -1;
893 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
894 for local symbol so that we can handle local STT_GNU_IFUNC symbols
895 as global symbol. We reuse indx and dynstr_index for local symbol
896 hash since they aren't used by global symbols in this backend. */
899 elf_i386_local_htab_hash (const void *ptr
)
901 struct elf_link_hash_entry
*h
902 = (struct elf_link_hash_entry
*) ptr
;
903 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
906 /* Compare local hash entries. */
909 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
911 struct elf_link_hash_entry
*h1
912 = (struct elf_link_hash_entry
*) ptr1
;
913 struct elf_link_hash_entry
*h2
914 = (struct elf_link_hash_entry
*) ptr2
;
916 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
919 /* Find and/or create a hash entry for local symbol. */
921 static struct elf_link_hash_entry
*
922 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
923 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
926 struct elf_i386_link_hash_entry e
, *ret
;
927 asection
*sec
= abfd
->sections
;
928 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
929 ELF32_R_SYM (rel
->r_info
));
932 e
.elf
.indx
= sec
->id
;
933 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
934 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
935 create
? INSERT
: NO_INSERT
);
942 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
946 ret
= (struct elf_i386_link_hash_entry
*)
947 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
948 sizeof (struct elf_i386_link_hash_entry
));
951 memset (ret
, 0, sizeof (*ret
));
952 ret
->elf
.indx
= sec
->id
;
953 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
954 ret
->elf
.dynindx
= -1;
955 ret
->plt_got
.offset
= (bfd_vma
) -1;
961 /* Destroy an i386 ELF linker hash table. */
964 elf_i386_link_hash_table_free (bfd
*obfd
)
966 struct elf_i386_link_hash_table
*htab
967 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
969 if (htab
->loc_hash_table
)
970 htab_delete (htab
->loc_hash_table
);
971 if (htab
->loc_hash_memory
)
972 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
973 _bfd_elf_link_hash_table_free (obfd
);
976 /* Create an i386 ELF linker hash table. */
978 static struct bfd_link_hash_table
*
979 elf_i386_link_hash_table_create (bfd
*abfd
)
981 struct elf_i386_link_hash_table
*ret
;
982 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
984 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
988 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
989 elf_i386_link_hash_newfunc
,
990 sizeof (struct elf_i386_link_hash_entry
),
997 ret
->loc_hash_table
= htab_try_create (1024,
998 elf_i386_local_htab_hash
,
999 elf_i386_local_htab_eq
,
1001 ret
->loc_hash_memory
= objalloc_create ();
1002 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1004 elf_i386_link_hash_table_free (abfd
);
1007 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1009 return &ret
->elf
.root
;
1012 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1013 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1017 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1019 struct elf_i386_link_hash_table
*htab
;
1021 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1024 htab
= elf_i386_hash_table (info
);
1028 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1032 if (info
->executable
)
1034 /* Always allow copy relocs for building executables. */
1035 asection
*s
= bfd_get_linker_section (dynobj
, ".rel.bss");
1038 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1039 s
= bfd_make_section_anyway_with_flags (dynobj
,
1041 (bed
->dynamic_sec_flags
1044 || ! bfd_set_section_alignment (dynobj
, s
,
1045 bed
->s
->log_file_align
))
1051 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1052 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1056 if (!info
->no_ld_generated_unwind_info
1057 && htab
->plt_eh_frame
== NULL
1058 && htab
->elf
.splt
!= NULL
)
1060 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1061 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1062 | SEC_LINKER_CREATED
);
1064 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1065 if (htab
->plt_eh_frame
== NULL
1066 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1073 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1076 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1077 struct elf_link_hash_entry
*dir
,
1078 struct elf_link_hash_entry
*ind
)
1080 struct elf_i386_link_hash_entry
*edir
, *eind
;
1082 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1083 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1085 if (eind
->dyn_relocs
!= NULL
)
1087 if (edir
->dyn_relocs
!= NULL
)
1089 struct elf_dyn_relocs
**pp
;
1090 struct elf_dyn_relocs
*p
;
1092 /* Add reloc counts against the indirect sym to the direct sym
1093 list. Merge any entries against the same section. */
1094 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1096 struct elf_dyn_relocs
*q
;
1098 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1099 if (q
->sec
== p
->sec
)
1101 q
->pc_count
+= p
->pc_count
;
1102 q
->count
+= p
->count
;
1109 *pp
= edir
->dyn_relocs
;
1112 edir
->dyn_relocs
= eind
->dyn_relocs
;
1113 eind
->dyn_relocs
= NULL
;
1116 if (ind
->root
.type
== bfd_link_hash_indirect
1117 && dir
->got
.refcount
<= 0)
1119 edir
->tls_type
= eind
->tls_type
;
1120 eind
->tls_type
= GOT_UNKNOWN
;
1123 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1124 generate a R_386_COPY reloc. */
1125 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1127 if (ELIMINATE_COPY_RELOCS
1128 && ind
->root
.type
!= bfd_link_hash_indirect
1129 && dir
->dynamic_adjusted
)
1131 /* If called to transfer flags for a weakdef during processing
1132 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1133 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1134 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1135 dir
->ref_regular
|= ind
->ref_regular
;
1136 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1137 dir
->needs_plt
|= ind
->needs_plt
;
1138 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1141 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1144 /* Return TRUE if the TLS access code sequence support transition
1148 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1150 Elf_Internal_Shdr
*symtab_hdr
,
1151 struct elf_link_hash_entry
**sym_hashes
,
1152 unsigned int r_type
,
1153 const Elf_Internal_Rela
*rel
,
1154 const Elf_Internal_Rela
*relend
)
1156 unsigned int val
, type
;
1157 unsigned long r_symndx
;
1158 struct elf_link_hash_entry
*h
;
1161 /* Get the section contents. */
1162 if (contents
== NULL
)
1164 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1165 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1168 /* FIXME: How to better handle error condition? */
1169 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1172 /* Cache the section contents for elf_link_input_bfd. */
1173 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1177 offset
= rel
->r_offset
;
1182 if (offset
< 2 || (rel
+ 1) >= relend
)
1185 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1186 if (r_type
== R_386_TLS_GD
)
1188 /* Check transition from GD access model. Only
1189 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1190 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1191 can transit to different access model. */
1192 if ((offset
+ 10) > sec
->size
||
1193 (type
!= 0x8d && type
!= 0x04))
1196 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1199 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1203 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1206 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1211 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1212 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1215 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1221 /* Check transition from LD access model. Only
1222 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1223 can transit to different access model. */
1224 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1227 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1228 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1232 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1235 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1236 if (r_symndx
< symtab_hdr
->sh_info
)
1239 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1240 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1241 may be versioned. */
1243 && h
->root
.root
.string
!= NULL
1244 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1245 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1246 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1250 /* Check transition from IE access model:
1251 movl foo@indntpoff(%rip), %eax
1252 movl foo@indntpoff(%rip), %reg
1253 addl foo@indntpoff(%rip), %reg
1256 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1259 /* Check "movl foo@tpoff(%rip), %eax" first. */
1260 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1267 /* Check movl|addl foo@tpoff(%rip), %reg. */
1268 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1269 return ((type
== 0x8b || type
== 0x03)
1270 && (val
& 0xc7) == 0x05);
1272 case R_386_TLS_GOTIE
:
1273 case R_386_TLS_IE_32
:
1274 /* Check transition from {IE_32,GOTIE} access model:
1275 subl foo@{tpoff,gontoff}(%reg1), %reg2
1276 movl foo@{tpoff,gontoff}(%reg1), %reg2
1277 addl foo@{tpoff,gontoff}(%reg1), %reg2
1280 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1283 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1284 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1287 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1288 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1290 case R_386_TLS_GOTDESC
:
1291 /* Check transition from GDesc access model:
1292 leal x@tlsdesc(%ebx), %eax
1294 Make sure it's a leal adding ebx to a 32-bit offset
1295 into any register, although it's probably almost always
1298 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1301 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1304 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1305 return (val
& 0xc7) == 0x83;
1307 case R_386_TLS_DESC_CALL
:
1308 /* Check transition from GDesc access model:
1309 call *x@tlsdesc(%rax)
1311 if (offset
+ 2 <= sec
->size
)
1313 /* Make sure that it's a call *x@tlsdesc(%rax). */
1314 static const unsigned char call
[] = { 0xff, 0x10 };
1315 return memcmp (contents
+ offset
, call
, 2) == 0;
1325 /* Return TRUE if the TLS access transition is OK or no transition
1326 will be performed. Update R_TYPE if there is a transition. */
1329 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1330 asection
*sec
, bfd_byte
*contents
,
1331 Elf_Internal_Shdr
*symtab_hdr
,
1332 struct elf_link_hash_entry
**sym_hashes
,
1333 unsigned int *r_type
, int tls_type
,
1334 const Elf_Internal_Rela
*rel
,
1335 const Elf_Internal_Rela
*relend
,
1336 struct elf_link_hash_entry
*h
,
1337 unsigned long r_symndx
)
1339 unsigned int from_type
= *r_type
;
1340 unsigned int to_type
= from_type
;
1341 bfd_boolean check
= TRUE
;
1343 /* Skip TLS transition for functions. */
1345 && (h
->type
== STT_FUNC
1346 || h
->type
== STT_GNU_IFUNC
))
1352 case R_386_TLS_GOTDESC
:
1353 case R_386_TLS_DESC_CALL
:
1354 case R_386_TLS_IE_32
:
1356 case R_386_TLS_GOTIE
:
1357 if (info
->executable
)
1360 to_type
= R_386_TLS_LE_32
;
1361 else if (from_type
!= R_386_TLS_IE
1362 && from_type
!= R_386_TLS_GOTIE
)
1363 to_type
= R_386_TLS_IE_32
;
1366 /* When we are called from elf_i386_relocate_section, CONTENTS
1367 isn't NULL and there may be additional transitions based on
1369 if (contents
!= NULL
)
1371 unsigned int new_to_type
= to_type
;
1373 if (info
->executable
1376 && (tls_type
& GOT_TLS_IE
))
1377 new_to_type
= R_386_TLS_LE_32
;
1379 if (to_type
== R_386_TLS_GD
1380 || to_type
== R_386_TLS_GOTDESC
1381 || to_type
== R_386_TLS_DESC_CALL
)
1383 if (tls_type
== GOT_TLS_IE_POS
)
1384 new_to_type
= R_386_TLS_GOTIE
;
1385 else if (tls_type
& GOT_TLS_IE
)
1386 new_to_type
= R_386_TLS_IE_32
;
1389 /* We checked the transition before when we were called from
1390 elf_i386_check_relocs. We only want to check the new
1391 transition which hasn't been checked before. */
1392 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1393 to_type
= new_to_type
;
1399 if (info
->executable
)
1400 to_type
= R_386_TLS_LE_32
;
1407 /* Return TRUE if there is no transition. */
1408 if (from_type
== to_type
)
1411 /* Check if the transition can be performed. */
1413 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1414 symtab_hdr
, sym_hashes
,
1415 from_type
, rel
, relend
))
1417 reloc_howto_type
*from
, *to
;
1420 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1421 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1424 name
= h
->root
.root
.string
;
1427 struct elf_i386_link_hash_table
*htab
;
1429 htab
= elf_i386_hash_table (info
);
1434 Elf_Internal_Sym
*isym
;
1436 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1438 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1442 (*_bfd_error_handler
)
1443 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1444 "in section `%A' failed"),
1445 abfd
, sec
, from
->name
, to
->name
, name
,
1446 (unsigned long) rel
->r_offset
);
1447 bfd_set_error (bfd_error_bad_value
);
1455 /* Rename some of the generic section flags to better document how they
1457 #define need_convert_mov_to_lea sec_flg0
1459 /* Look through the relocs for a section during the first phase, and
1460 calculate needed space in the global offset table, procedure linkage
1461 table, and dynamic reloc sections. */
1464 elf_i386_check_relocs (bfd
*abfd
,
1465 struct bfd_link_info
*info
,
1467 const Elf_Internal_Rela
*relocs
)
1469 struct elf_i386_link_hash_table
*htab
;
1470 Elf_Internal_Shdr
*symtab_hdr
;
1471 struct elf_link_hash_entry
**sym_hashes
;
1472 const Elf_Internal_Rela
*rel
;
1473 const Elf_Internal_Rela
*rel_end
;
1475 bfd_boolean use_plt_got
;
1477 if (info
->relocatable
)
1480 BFD_ASSERT (is_i386_elf (abfd
));
1482 htab
= elf_i386_hash_table (info
);
1486 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1487 && (get_elf_i386_backend_data (abfd
)
1488 == &elf_i386_arch_bed
));
1490 symtab_hdr
= &elf_symtab_hdr (abfd
);
1491 sym_hashes
= elf_sym_hashes (abfd
);
1495 rel_end
= relocs
+ sec
->reloc_count
;
1496 for (rel
= relocs
; rel
< rel_end
; rel
++)
1498 unsigned int r_type
;
1499 unsigned long r_symndx
;
1500 struct elf_link_hash_entry
*h
;
1501 struct elf_i386_link_hash_entry
*eh
;
1502 Elf_Internal_Sym
*isym
;
1504 bfd_boolean size_reloc
;
1506 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1507 r_type
= ELF32_R_TYPE (rel
->r_info
);
1509 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1511 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1517 if (r_symndx
< symtab_hdr
->sh_info
)
1519 /* A local symbol. */
1520 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1525 /* Check relocation against local STT_GNU_IFUNC symbol. */
1526 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1528 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1532 /* Fake a STT_GNU_IFUNC symbol. */
1533 h
->type
= STT_GNU_IFUNC
;
1536 h
->forced_local
= 1;
1537 h
->root
.type
= bfd_link_hash_defined
;
1545 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1546 while (h
->root
.type
== bfd_link_hash_indirect
1547 || h
->root
.type
== bfd_link_hash_warning
)
1548 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1551 eh
= (struct elf_i386_link_hash_entry
*) h
;
1554 /* Create the ifunc sections for static executables. If we
1555 never see an indirect function symbol nor we are building
1556 a static executable, those sections will be empty and
1557 won't appear in output. */
1569 if (htab
->elf
.dynobj
== NULL
)
1570 htab
->elf
.dynobj
= abfd
;
1571 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1576 /* It is referenced by a non-shared object. */
1578 h
->root
.non_ir_ref
= 1;
1581 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1582 symtab_hdr
, sym_hashes
,
1583 &r_type
, GOT_UNKNOWN
,
1584 rel
, rel_end
, h
, r_symndx
))
1590 htab
->tls_ldm_got
.refcount
+= 1;
1594 /* This symbol requires a procedure linkage table entry. We
1595 actually build the entry in adjust_dynamic_symbol,
1596 because this might be a case of linking PIC code which is
1597 never referenced by a dynamic object, in which case we
1598 don't need to generate a procedure linkage table entry
1601 /* If this is a local symbol, we resolve it directly without
1602 creating a procedure linkage table entry. */
1607 h
->plt
.refcount
+= 1;
1614 case R_386_TLS_IE_32
:
1616 case R_386_TLS_GOTIE
:
1617 if (!info
->executable
)
1618 info
->flags
|= DF_STATIC_TLS
;
1623 case R_386_TLS_GOTDESC
:
1624 case R_386_TLS_DESC_CALL
:
1625 /* This symbol requires a global offset table entry. */
1627 int tls_type
, old_tls_type
;
1632 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1633 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1634 case R_386_TLS_GOTDESC
:
1635 case R_386_TLS_DESC_CALL
:
1636 tls_type
= GOT_TLS_GDESC
; break;
1637 case R_386_TLS_IE_32
:
1638 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1639 tls_type
= GOT_TLS_IE_NEG
;
1641 /* If this is a GD->IE transition, we may use either of
1642 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1643 tls_type
= GOT_TLS_IE
;
1646 case R_386_TLS_GOTIE
:
1647 tls_type
= GOT_TLS_IE_POS
; break;
1652 h
->got
.refcount
+= 1;
1653 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1657 bfd_signed_vma
*local_got_refcounts
;
1659 /* This is a global offset table entry for a local symbol. */
1660 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1661 if (local_got_refcounts
== NULL
)
1665 size
= symtab_hdr
->sh_info
;
1666 size
*= (sizeof (bfd_signed_vma
)
1667 + sizeof (bfd_vma
) + sizeof(char));
1668 local_got_refcounts
= (bfd_signed_vma
*)
1669 bfd_zalloc (abfd
, size
);
1670 if (local_got_refcounts
== NULL
)
1672 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1673 elf_i386_local_tlsdesc_gotent (abfd
)
1674 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1675 elf_i386_local_got_tls_type (abfd
)
1676 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1678 local_got_refcounts
[r_symndx
] += 1;
1679 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1682 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1683 tls_type
|= old_tls_type
;
1684 /* If a TLS symbol is accessed using IE at least once,
1685 there is no point to use dynamic model for it. */
1686 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1687 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1688 || (tls_type
& GOT_TLS_IE
) == 0))
1690 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1691 tls_type
= old_tls_type
;
1692 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1693 && GOT_TLS_GD_ANY_P (tls_type
))
1694 tls_type
|= old_tls_type
;
1698 name
= h
->root
.root
.string
;
1700 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1702 (*_bfd_error_handler
)
1703 (_("%B: `%s' accessed both as normal and "
1704 "thread local symbol"),
1706 bfd_set_error (bfd_error_bad_value
);
1711 if (old_tls_type
!= tls_type
)
1714 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1716 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1724 if (htab
->elf
.sgot
== NULL
)
1726 if (htab
->elf
.dynobj
== NULL
)
1727 htab
->elf
.dynobj
= abfd
;
1728 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1731 if (r_type
!= R_386_TLS_IE
)
1735 case R_386_TLS_LE_32
:
1737 if (info
->executable
)
1739 info
->flags
|= DF_STATIC_TLS
;
1744 if (h
!= NULL
&& info
->executable
)
1746 /* If this reloc is in a read-only section, we might
1747 need a copy reloc. We can't check reliably at this
1748 stage whether the section is read-only, as input
1749 sections have not yet been mapped to output sections.
1750 Tentatively set the flag for now, and correct in
1751 adjust_dynamic_symbol. */
1754 /* We may need a .plt entry if the function this reloc
1755 refers to is in a shared lib. */
1756 h
->plt
.refcount
+= 1;
1757 if (r_type
!= R_386_PC32
)
1758 h
->pointer_equality_needed
= 1;
1763 /* If we are creating a shared library, and this is a reloc
1764 against a global symbol, or a non PC relative reloc
1765 against a local symbol, then we need to copy the reloc
1766 into the shared library. However, if we are linking with
1767 -Bsymbolic, we do not need to copy a reloc against a
1768 global symbol which is defined in an object we are
1769 including in the link (i.e., DEF_REGULAR is set). At
1770 this point we have not seen all the input files, so it is
1771 possible that DEF_REGULAR is not set now but will be set
1772 later (it is never cleared). In case of a weak definition,
1773 DEF_REGULAR may be cleared later by a strong definition in
1774 a shared library. We account for that possibility below by
1775 storing information in the relocs_copied field of the hash
1776 table entry. A similar situation occurs when creating
1777 shared libraries and symbol visibility changes render the
1780 If on the other hand, we are creating an executable, we
1781 may need to keep relocations for symbols satisfied by a
1782 dynamic library if we manage to avoid copy relocs for the
1785 && (sec
->flags
& SEC_ALLOC
) != 0
1786 && (r_type
!= R_386_PC32
1788 && (! SYMBOLIC_BIND (info
, h
)
1789 || h
->root
.type
== bfd_link_hash_defweak
1790 || !h
->def_regular
))))
1791 || (ELIMINATE_COPY_RELOCS
1793 && (sec
->flags
& SEC_ALLOC
) != 0
1795 && (h
->root
.type
== bfd_link_hash_defweak
1796 || !h
->def_regular
)))
1798 struct elf_dyn_relocs
*p
;
1799 struct elf_dyn_relocs
**head
;
1801 /* We must copy these reloc types into the output file.
1802 Create a reloc section in dynobj and make room for
1806 if (htab
->elf
.dynobj
== NULL
)
1807 htab
->elf
.dynobj
= abfd
;
1809 sreloc
= _bfd_elf_make_dynamic_reloc_section
1810 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1816 /* If this is a global symbol, we count the number of
1817 relocations we need for this symbol. */
1820 head
= &eh
->dyn_relocs
;
1824 /* Track dynamic relocs needed for local syms too.
1825 We really need local syms available to do this
1830 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1835 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1839 vpp
= &elf_section_data (s
)->local_dynrel
;
1840 head
= (struct elf_dyn_relocs
**)vpp
;
1844 if (p
== NULL
|| p
->sec
!= sec
)
1846 bfd_size_type amt
= sizeof *p
;
1847 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1859 /* Count size relocation as PC-relative relocation. */
1860 if (r_type
== R_386_PC32
|| size_reloc
)
1865 /* This relocation describes the C++ object vtable hierarchy.
1866 Reconstruct it for later use during GC. */
1867 case R_386_GNU_VTINHERIT
:
1868 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1872 /* This relocation describes which C++ vtable entries are actually
1873 used. Record for later use during GC. */
1874 case R_386_GNU_VTENTRY
:
1875 BFD_ASSERT (h
!= NULL
);
1877 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1887 && h
->plt
.refcount
> 0
1888 && ((info
->flags
& DF_BIND_NOW
) || h
->got
.refcount
> 0)
1889 && htab
->plt_got
== NULL
)
1891 /* Create the GOT procedure linkage table. */
1892 unsigned int plt_got_align
;
1893 const struct elf_backend_data
*bed
;
1895 bed
= get_elf_backend_data (info
->output_bfd
);
1896 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1897 && (sizeof (elf_i386_got_plt_entry
)
1898 == sizeof (elf_i386_pic_got_plt_entry
)));
1901 if (htab
->elf
.dynobj
== NULL
)
1902 htab
->elf
.dynobj
= abfd
;
1904 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
1906 (bed
->dynamic_sec_flags
1911 if (htab
->plt_got
== NULL
1912 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
1918 if (r_type
== R_386_GOT32
1919 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1920 sec
->need_convert_mov_to_lea
= 1;
1926 /* Return the section that should be marked against GC for a given
1930 elf_i386_gc_mark_hook (asection
*sec
,
1931 struct bfd_link_info
*info
,
1932 Elf_Internal_Rela
*rel
,
1933 struct elf_link_hash_entry
*h
,
1934 Elf_Internal_Sym
*sym
)
1937 switch (ELF32_R_TYPE (rel
->r_info
))
1939 case R_386_GNU_VTINHERIT
:
1940 case R_386_GNU_VTENTRY
:
1944 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1947 /* Update the got entry reference counts for the section being removed. */
1950 elf_i386_gc_sweep_hook (bfd
*abfd
,
1951 struct bfd_link_info
*info
,
1953 const Elf_Internal_Rela
*relocs
)
1955 struct elf_i386_link_hash_table
*htab
;
1956 Elf_Internal_Shdr
*symtab_hdr
;
1957 struct elf_link_hash_entry
**sym_hashes
;
1958 bfd_signed_vma
*local_got_refcounts
;
1959 const Elf_Internal_Rela
*rel
, *relend
;
1961 if (info
->relocatable
)
1964 htab
= elf_i386_hash_table (info
);
1968 elf_section_data (sec
)->local_dynrel
= NULL
;
1970 symtab_hdr
= &elf_symtab_hdr (abfd
);
1971 sym_hashes
= elf_sym_hashes (abfd
);
1972 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1974 relend
= relocs
+ sec
->reloc_count
;
1975 for (rel
= relocs
; rel
< relend
; rel
++)
1977 unsigned long r_symndx
;
1978 unsigned int r_type
;
1979 struct elf_link_hash_entry
*h
= NULL
;
1981 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1982 if (r_symndx
>= symtab_hdr
->sh_info
)
1984 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1985 while (h
->root
.type
== bfd_link_hash_indirect
1986 || h
->root
.type
== bfd_link_hash_warning
)
1987 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1991 /* A local symbol. */
1992 Elf_Internal_Sym
*isym
;
1994 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1997 /* Check relocation against local STT_GNU_IFUNC symbol. */
1999 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2001 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2009 struct elf_i386_link_hash_entry
*eh
;
2010 struct elf_dyn_relocs
**pp
;
2011 struct elf_dyn_relocs
*p
;
2013 eh
= (struct elf_i386_link_hash_entry
*) h
;
2014 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2017 /* Everything must go for SEC. */
2023 r_type
= ELF32_R_TYPE (rel
->r_info
);
2024 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
2025 symtab_hdr
, sym_hashes
,
2026 &r_type
, GOT_UNKNOWN
,
2027 rel
, relend
, h
, r_symndx
))
2033 if (htab
->tls_ldm_got
.refcount
> 0)
2034 htab
->tls_ldm_got
.refcount
-= 1;
2038 case R_386_TLS_GOTDESC
:
2039 case R_386_TLS_DESC_CALL
:
2040 case R_386_TLS_IE_32
:
2042 case R_386_TLS_GOTIE
:
2046 if (h
->got
.refcount
> 0)
2047 h
->got
.refcount
-= 1;
2048 if (h
->type
== STT_GNU_IFUNC
)
2050 if (h
->plt
.refcount
> 0)
2051 h
->plt
.refcount
-= 1;
2054 else if (local_got_refcounts
!= NULL
)
2056 if (local_got_refcounts
[r_symndx
] > 0)
2057 local_got_refcounts
[r_symndx
] -= 1;
2065 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2072 if (h
->plt
.refcount
> 0)
2073 h
->plt
.refcount
-= 1;
2078 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2080 if (h
->got
.refcount
> 0)
2081 h
->got
.refcount
-= 1;
2082 if (h
->plt
.refcount
> 0)
2083 h
->plt
.refcount
-= 1;
2095 /* Adjust a symbol defined by a dynamic object and referenced by a
2096 regular object. The current definition is in some section of the
2097 dynamic object, but we're not including those sections. We have to
2098 change the definition to something the rest of the link can
2102 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2103 struct elf_link_hash_entry
*h
)
2105 struct elf_i386_link_hash_table
*htab
;
2107 struct elf_i386_link_hash_entry
*eh
;
2108 struct elf_dyn_relocs
*p
;
2110 /* STT_GNU_IFUNC symbol must go through PLT. */
2111 if (h
->type
== STT_GNU_IFUNC
)
2113 /* All local STT_GNU_IFUNC references must be treate as local
2114 calls via local PLT. */
2116 && SYMBOL_CALLS_LOCAL (info
, h
))
2118 bfd_size_type pc_count
= 0, count
= 0;
2119 struct elf_dyn_relocs
**pp
;
2121 eh
= (struct elf_i386_link_hash_entry
*) h
;
2122 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2124 pc_count
+= p
->pc_count
;
2125 p
->count
-= p
->pc_count
;
2134 if (pc_count
|| count
)
2138 if (h
->plt
.refcount
<= 0)
2139 h
->plt
.refcount
= 1;
2141 h
->plt
.refcount
+= 1;
2145 if (h
->plt
.refcount
<= 0)
2147 h
->plt
.offset
= (bfd_vma
) -1;
2153 /* If this is a function, put it in the procedure linkage table. We
2154 will fill in the contents of the procedure linkage table later,
2155 when we know the address of the .got section. */
2156 if (h
->type
== STT_FUNC
2159 if (h
->plt
.refcount
<= 0
2160 || SYMBOL_CALLS_LOCAL (info
, h
)
2161 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2162 && h
->root
.type
== bfd_link_hash_undefweak
))
2164 /* This case can occur if we saw a PLT32 reloc in an input
2165 file, but the symbol was never referred to by a dynamic
2166 object, or if all references were garbage collected. In
2167 such a case, we don't actually need to build a procedure
2168 linkage table, and we can just do a PC32 reloc instead. */
2169 h
->plt
.offset
= (bfd_vma
) -1;
2176 /* It's possible that we incorrectly decided a .plt reloc was
2177 needed for an R_386_PC32 reloc to a non-function sym in
2178 check_relocs. We can't decide accurately between function and
2179 non-function syms in check-relocs; Objects loaded later in
2180 the link may change h->type. So fix it now. */
2181 h
->plt
.offset
= (bfd_vma
) -1;
2183 /* If this is a weak symbol, and there is a real definition, the
2184 processor independent code will have arranged for us to see the
2185 real definition first, and we can just use the same value. */
2186 if (h
->u
.weakdef
!= NULL
)
2188 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2189 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2190 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2191 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2192 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2193 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2197 /* This is a reference to a symbol defined by a dynamic object which
2198 is not a function. */
2200 /* If we are creating a shared library, we must presume that the
2201 only references to the symbol are via the global offset table.
2202 For such cases we need not do anything here; the relocations will
2203 be handled correctly by relocate_section. */
2204 if (!info
->executable
)
2207 /* If there are no references to this symbol that do not use the
2208 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2210 eh
= (struct elf_i386_link_hash_entry
*) h
;
2211 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2214 /* If -z nocopyreloc was given, we won't generate them either. */
2215 if (info
->nocopyreloc
)
2221 htab
= elf_i386_hash_table (info
);
2225 /* If there aren't any dynamic relocs in read-only sections nor
2226 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2227 avoid the copy reloc. This doesn't work on VxWorks, where we can
2228 not have dynamic relocations (other than copy and jump slot
2229 relocations) in an executable. */
2230 if (ELIMINATE_COPY_RELOCS
2232 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2234 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2236 s
= p
->sec
->output_section
;
2237 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2248 /* We must allocate the symbol in our .dynbss section, which will
2249 become part of the .bss section of the executable. There will be
2250 an entry for this symbol in the .dynsym section. The dynamic
2251 object will contain position independent code, so all references
2252 from the dynamic object to this symbol will go through the global
2253 offset table. The dynamic linker will use the .dynsym entry to
2254 determine the address it must put in the global offset table, so
2255 both the dynamic object and the regular object will refer to the
2256 same memory location for the variable. */
2258 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2259 copy the initial value out of the dynamic object and into the
2260 runtime process image. */
2261 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2263 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2269 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2272 /* Allocate space in .plt, .got and associated reloc sections for
2276 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2278 struct bfd_link_info
*info
;
2279 struct elf_i386_link_hash_table
*htab
;
2280 struct elf_i386_link_hash_entry
*eh
;
2281 struct elf_dyn_relocs
*p
;
2282 unsigned plt_entry_size
;
2284 if (h
->root
.type
== bfd_link_hash_indirect
)
2287 eh
= (struct elf_i386_link_hash_entry
*) h
;
2289 info
= (struct bfd_link_info
*) inf
;
2290 htab
= elf_i386_hash_table (info
);
2294 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2296 /* We can't use the GOT PLT if pointer equality is needed since
2297 finish_dynamic_symbol won't clear symbol value and the dynamic
2298 linker won't update the GOT slot. We will get into an infinite
2299 loop at run-time. */
2300 if (htab
->plt_got
!= NULL
2301 && h
->type
!= STT_GNU_IFUNC
2302 && !h
->pointer_equality_needed
2303 && h
->plt
.refcount
> 0
2304 && h
->got
.refcount
> 0)
2306 /* Don't use the regular PLT if there are both GOT and GOTPLT
2308 h
->plt
.offset
= (bfd_vma
) -1;
2310 /* Use the GOT PLT. */
2311 eh
->plt_got
.refcount
= 1;
2314 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2315 here if it is defined and referenced in a non-shared object. */
2316 if (h
->type
== STT_GNU_IFUNC
2318 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2321 else if (htab
->elf
.dynamic_sections_created
2322 && (h
->plt
.refcount
> 0 || eh
->plt_got
.refcount
> 0))
2324 bfd_boolean use_plt_got
;
2326 if ((info
->flags
& DF_BIND_NOW
))
2328 /* Don't use the regular PLT for DF_BIND_NOW. */
2329 h
->plt
.offset
= (bfd_vma
) -1;
2331 /* Use the GOT PLT. */
2332 h
->got
.refcount
= 1;
2333 eh
->plt_got
.refcount
= 1;
2336 use_plt_got
= eh
->plt_got
.refcount
> 0;
2338 /* Make sure this symbol is output as a dynamic symbol.
2339 Undefined weak syms won't yet be marked as dynamic. */
2340 if (h
->dynindx
== -1
2341 && !h
->forced_local
)
2343 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2348 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2350 asection
*s
= htab
->elf
.splt
;
2351 asection
*got_s
= htab
->plt_got
;
2354 eh
->plt_got
.offset
= got_s
->size
;
2357 /* If this is the first .plt entry, make room for the
2358 special first entry. */
2360 s
->size
= plt_entry_size
;
2361 h
->plt
.offset
= s
->size
;
2364 /* If this symbol is not defined in a regular file, and we are
2365 not generating a shared library, then set the symbol to this
2366 location in the .plt. This is required to make function
2367 pointers compare as equal between the normal executable and
2368 the shared library. */
2374 /* We need to make a call to the entry of the GOT PLT
2375 instead of regular PLT entry. */
2376 h
->root
.u
.def
.section
= got_s
;
2377 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2381 h
->root
.u
.def
.section
= s
;
2382 h
->root
.u
.def
.value
= h
->plt
.offset
;
2386 /* Make room for this entry. */
2388 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2391 s
->size
+= plt_entry_size
;
2393 /* We also need to make an entry in the .got.plt section,
2394 which will be placed in the .got section by the linker
2396 htab
->elf
.sgotplt
->size
+= 4;
2398 /* We also need to make an entry in the .rel.plt section. */
2399 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2400 htab
->elf
.srelplt
->reloc_count
++;
2403 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2406 /* VxWorks has a second set of relocations for each PLT entry
2407 in executables. They go in a separate relocation section,
2408 which is processed by the kernel loader. */
2410 /* There are two relocations for the initial PLT entry: an
2411 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2412 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2414 if (h
->plt
.offset
== plt_entry_size
)
2415 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2417 /* There are two extra relocations for each subsequent PLT entry:
2418 an R_386_32 relocation for the GOT entry, and an R_386_32
2419 relocation for the PLT entry. */
2421 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2426 h
->plt
.offset
= (bfd_vma
) -1;
2432 h
->plt
.offset
= (bfd_vma
) -1;
2436 eh
->tlsdesc_got
= (bfd_vma
) -1;
2438 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2439 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2440 if (h
->got
.refcount
> 0
2443 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2444 h
->got
.offset
= (bfd_vma
) -1;
2445 else if (h
->got
.refcount
> 0)
2449 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2451 /* Make sure this symbol is output as a dynamic symbol.
2452 Undefined weak syms won't yet be marked as dynamic. */
2453 if (h
->dynindx
== -1
2454 && !h
->forced_local
)
2456 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2461 if (GOT_TLS_GDESC_P (tls_type
))
2463 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2464 - elf_i386_compute_jump_table_size (htab
);
2465 htab
->elf
.sgotplt
->size
+= 8;
2466 h
->got
.offset
= (bfd_vma
) -2;
2468 if (! GOT_TLS_GDESC_P (tls_type
)
2469 || GOT_TLS_GD_P (tls_type
))
2471 h
->got
.offset
= s
->size
;
2473 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2474 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2477 dyn
= htab
->elf
.dynamic_sections_created
;
2478 /* R_386_TLS_IE_32 needs one dynamic relocation,
2479 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2480 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2481 need two), R_386_TLS_GD needs one if local symbol and two if
2483 if (tls_type
== GOT_TLS_IE_BOTH
)
2484 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2485 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2486 || (tls_type
& GOT_TLS_IE
))
2487 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2488 else if (GOT_TLS_GD_P (tls_type
))
2489 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2490 else if (! GOT_TLS_GDESC_P (tls_type
)
2491 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2492 || h
->root
.type
!= bfd_link_hash_undefweak
)
2494 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2495 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2496 if (GOT_TLS_GDESC_P (tls_type
))
2497 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2500 h
->got
.offset
= (bfd_vma
) -1;
2502 if (eh
->dyn_relocs
== NULL
)
2505 /* In the shared -Bsymbolic case, discard space allocated for
2506 dynamic pc-relative relocs against symbols which turn out to be
2507 defined in regular objects. For the normal shared case, discard
2508 space for pc-relative relocs that have become local due to symbol
2509 visibility changes. */
2513 /* The only reloc that uses pc_count is R_386_PC32, which will
2514 appear on a call or on something like ".long foo - .". We
2515 want calls to protected symbols to resolve directly to the
2516 function rather than going via the plt. If people want
2517 function pointer comparisons to work as expected then they
2518 should avoid writing assembly like ".long foo - .". */
2519 if (SYMBOL_CALLS_LOCAL (info
, h
))
2521 struct elf_dyn_relocs
**pp
;
2523 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2525 p
->count
-= p
->pc_count
;
2534 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2536 struct elf_dyn_relocs
**pp
;
2537 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2539 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2546 /* Also discard relocs on undefined weak syms with non-default
2548 if (eh
->dyn_relocs
!= NULL
2549 && h
->root
.type
== bfd_link_hash_undefweak
)
2551 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2552 eh
->dyn_relocs
= NULL
;
2554 /* Make sure undefined weak symbols are output as a dynamic
2556 else if (h
->dynindx
== -1
2557 && !h
->forced_local
)
2559 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2564 else if (ELIMINATE_COPY_RELOCS
)
2566 /* For the non-shared case, discard space for relocs against
2567 symbols which turn out to need copy relocs or are not
2573 || (htab
->elf
.dynamic_sections_created
2574 && (h
->root
.type
== bfd_link_hash_undefweak
2575 || h
->root
.type
== bfd_link_hash_undefined
))))
2577 /* Make sure this symbol is output as a dynamic symbol.
2578 Undefined weak syms won't yet be marked as dynamic. */
2579 if (h
->dynindx
== -1
2580 && !h
->forced_local
)
2582 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2586 /* If that succeeded, we know we'll be keeping all the
2588 if (h
->dynindx
!= -1)
2592 eh
->dyn_relocs
= NULL
;
2597 /* Finally, allocate space. */
2598 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2602 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2604 BFD_ASSERT (sreloc
!= NULL
);
2605 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2611 /* Allocate space in .plt, .got and associated reloc sections for
2612 local dynamic relocs. */
2615 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2617 struct elf_link_hash_entry
*h
2618 = (struct elf_link_hash_entry
*) *slot
;
2620 if (h
->type
!= STT_GNU_IFUNC
2624 || h
->root
.type
!= bfd_link_hash_defined
)
2627 return elf_i386_allocate_dynrelocs (h
, inf
);
2630 /* Find any dynamic relocs that apply to read-only sections. */
2633 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2635 struct elf_i386_link_hash_entry
*eh
;
2636 struct elf_dyn_relocs
*p
;
2638 /* Skip local IFUNC symbols. */
2639 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2642 eh
= (struct elf_i386_link_hash_entry
*) h
;
2643 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2645 asection
*s
= p
->sec
->output_section
;
2647 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2649 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2651 info
->flags
|= DF_TEXTREL
;
2653 if ((info
->warn_shared_textrel
&& info
->shared
)
2654 || info
->error_textrel
)
2655 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2656 p
->sec
->owner
, h
->root
.root
.string
,
2659 /* Not an error, just cut short the traversal. */
2667 mov foo@GOT(%reg), %reg
2669 lea foo@GOTOFF(%reg), %reg
2670 with the local symbol, foo. */
2673 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2674 struct bfd_link_info
*link_info
)
2676 Elf_Internal_Shdr
*symtab_hdr
;
2677 Elf_Internal_Rela
*internal_relocs
;
2678 Elf_Internal_Rela
*irel
, *irelend
;
2680 struct elf_i386_link_hash_table
*htab
;
2681 bfd_boolean changed_contents
;
2682 bfd_boolean changed_relocs
;
2683 bfd_signed_vma
*local_got_refcounts
;
2685 /* Don't even try to convert non-ELF outputs. */
2686 if (!is_elf_hash_table (link_info
->hash
))
2689 /* Nothing to do if there is no need or no output. */
2690 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2691 || sec
->need_convert_mov_to_lea
== 0
2692 || bfd_is_abs_section (sec
->output_section
))
2695 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2697 /* Load the relocations for this section. */
2698 internal_relocs
= (_bfd_elf_link_read_relocs
2699 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2700 link_info
->keep_memory
));
2701 if (internal_relocs
== NULL
)
2704 htab
= elf_i386_hash_table (link_info
);
2705 changed_contents
= FALSE
;
2706 changed_relocs
= FALSE
;
2707 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2709 /* Get the section contents. */
2710 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2711 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2714 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2718 irelend
= internal_relocs
+ sec
->reloc_count
;
2719 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2721 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2722 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2724 struct elf_link_hash_entry
*h
;
2726 if (r_type
!= R_386_GOT32
)
2729 /* Get the symbol referred to by the reloc. */
2730 if (r_symndx
< symtab_hdr
->sh_info
)
2732 Elf_Internal_Sym
*isym
;
2734 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2737 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2738 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2739 && irel
->r_offset
>= 2
2740 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2742 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2743 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2744 if (local_got_refcounts
!= NULL
2745 && local_got_refcounts
[r_symndx
] > 0)
2746 local_got_refcounts
[r_symndx
] -= 1;
2747 changed_contents
= TRUE
;
2748 changed_relocs
= TRUE
;
2753 indx
= r_symndx
- symtab_hdr
->sh_info
;
2754 h
= elf_sym_hashes (abfd
)[indx
];
2755 BFD_ASSERT (h
!= NULL
);
2757 while (h
->root
.type
== bfd_link_hash_indirect
2758 || h
->root
.type
== bfd_link_hash_warning
)
2759 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2761 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2762 optimizing _DYNAMIC since ld.so may use its link-time address. */
2764 && h
->type
!= STT_GNU_IFUNC
2765 && h
!= htab
->elf
.hdynamic
2766 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2767 && irel
->r_offset
>= 2
2768 && bfd_get_8 (abfd
, contents
+ irel
->r_offset
- 2) == 0x8b)
2770 bfd_put_8 (abfd
, 0x8d, contents
+ irel
->r_offset
- 2);
2771 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2772 if (h
->got
.refcount
> 0)
2773 h
->got
.refcount
-= 1;
2774 changed_contents
= TRUE
;
2775 changed_relocs
= TRUE
;
2779 if (contents
!= NULL
2780 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2782 if (!changed_contents
&& !link_info
->keep_memory
)
2786 /* Cache the section contents for elf_link_input_bfd. */
2787 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2791 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2793 if (!changed_relocs
)
2794 free (internal_relocs
);
2796 elf_section_data (sec
)->relocs
= internal_relocs
;
2802 if (contents
!= NULL
2803 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2805 if (internal_relocs
!= NULL
2806 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2807 free (internal_relocs
);
2811 /* Set the sizes of the dynamic sections. */
2814 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2816 struct elf_i386_link_hash_table
*htab
;
2822 htab
= elf_i386_hash_table (info
);
2825 dynobj
= htab
->elf
.dynobj
;
2829 if (htab
->elf
.dynamic_sections_created
)
2831 /* Set the contents of the .interp section to the interpreter. */
2832 if (info
->executable
)
2834 s
= bfd_get_linker_section (dynobj
, ".interp");
2837 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2838 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2842 /* Set up .got offsets for local syms, and space for local dynamic
2844 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2846 bfd_signed_vma
*local_got
;
2847 bfd_signed_vma
*end_local_got
;
2848 char *local_tls_type
;
2849 bfd_vma
*local_tlsdesc_gotent
;
2850 bfd_size_type locsymcount
;
2851 Elf_Internal_Shdr
*symtab_hdr
;
2854 if (! is_i386_elf (ibfd
))
2857 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2859 struct elf_dyn_relocs
*p
;
2861 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2864 for (p
= ((struct elf_dyn_relocs
*)
2865 elf_section_data (s
)->local_dynrel
);
2869 if (!bfd_is_abs_section (p
->sec
)
2870 && bfd_is_abs_section (p
->sec
->output_section
))
2872 /* Input section has been discarded, either because
2873 it is a copy of a linkonce section or due to
2874 linker script /DISCARD/, so we'll be discarding
2877 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2878 && strcmp (p
->sec
->output_section
->name
,
2881 /* Relocations in vxworks .tls_vars sections are
2882 handled specially by the loader. */
2884 else if (p
->count
!= 0)
2886 srel
= elf_section_data (p
->sec
)->sreloc
;
2887 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2888 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2889 && (info
->flags
& DF_TEXTREL
) == 0)
2891 info
->flags
|= DF_TEXTREL
;
2892 if ((info
->warn_shared_textrel
&& info
->shared
)
2893 || info
->error_textrel
)
2894 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
2895 p
->sec
->owner
, p
->sec
);
2901 local_got
= elf_local_got_refcounts (ibfd
);
2905 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2906 locsymcount
= symtab_hdr
->sh_info
;
2907 end_local_got
= local_got
+ locsymcount
;
2908 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2909 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2911 srel
= htab
->elf
.srelgot
;
2912 for (; local_got
< end_local_got
;
2913 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2915 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2918 if (GOT_TLS_GDESC_P (*local_tls_type
))
2920 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2921 - elf_i386_compute_jump_table_size (htab
);
2922 htab
->elf
.sgotplt
->size
+= 8;
2923 *local_got
= (bfd_vma
) -2;
2925 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2926 || GOT_TLS_GD_P (*local_tls_type
))
2928 *local_got
= s
->size
;
2930 if (GOT_TLS_GD_P (*local_tls_type
)
2931 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2935 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2936 || (*local_tls_type
& GOT_TLS_IE
))
2938 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2939 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2940 else if (GOT_TLS_GD_P (*local_tls_type
)
2941 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2942 srel
->size
+= sizeof (Elf32_External_Rel
);
2943 if (GOT_TLS_GDESC_P (*local_tls_type
))
2944 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2948 *local_got
= (bfd_vma
) -1;
2952 if (htab
->tls_ldm_got
.refcount
> 0)
2954 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2956 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2957 htab
->elf
.sgot
->size
+= 8;
2958 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2961 htab
->tls_ldm_got
.offset
= -1;
2963 /* Allocate global sym .plt and .got entries, and space for global
2964 sym dynamic relocs. */
2965 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2967 /* Allocate .plt and .got entries, and space for local symbols. */
2968 htab_traverse (htab
->loc_hash_table
,
2969 elf_i386_allocate_local_dynrelocs
,
2972 /* For every jump slot reserved in the sgotplt, reloc_count is
2973 incremented. However, when we reserve space for TLS descriptors,
2974 it's not incremented, so in order to compute the space reserved
2975 for them, it suffices to multiply the reloc count by the jump
2978 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2979 so that R_386_IRELATIVE entries come last. */
2980 if (htab
->elf
.srelplt
)
2982 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2983 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2984 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2986 else if (htab
->elf
.irelplt
)
2987 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2990 if (htab
->elf
.sgotplt
)
2992 /* Don't allocate .got.plt section if there are no GOT nor PLT
2993 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2994 if ((htab
->elf
.hgot
== NULL
2995 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2996 && (htab
->elf
.sgotplt
->size
2997 == get_elf_backend_data (output_bfd
)->got_header_size
)
2998 && (htab
->elf
.splt
== NULL
2999 || htab
->elf
.splt
->size
== 0)
3000 && (htab
->elf
.sgot
== NULL
3001 || htab
->elf
.sgot
->size
== 0)
3002 && (htab
->elf
.iplt
== NULL
3003 || htab
->elf
.iplt
->size
== 0)
3004 && (htab
->elf
.igotplt
== NULL
3005 || htab
->elf
.igotplt
->size
== 0))
3006 htab
->elf
.sgotplt
->size
= 0;
3010 if (htab
->plt_eh_frame
!= NULL
3011 && htab
->elf
.splt
!= NULL
3012 && htab
->elf
.splt
->size
!= 0
3013 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3014 && _bfd_elf_eh_frame_present (info
))
3015 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
3017 /* We now have determined the sizes of the various dynamic sections.
3018 Allocate memory for them. */
3020 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3022 bfd_boolean strip_section
= TRUE
;
3024 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3027 if (s
== htab
->elf
.splt
3028 || s
== htab
->elf
.sgot
)
3030 /* Strip this section if we don't need it; see the
3032 /* We'd like to strip these sections if they aren't needed, but if
3033 we've exported dynamic symbols from them we must leave them.
3034 It's too late to tell BFD to get rid of the symbols. */
3036 if (htab
->elf
.hplt
!= NULL
)
3037 strip_section
= FALSE
;
3039 else if (s
== htab
->elf
.sgotplt
3040 || s
== htab
->elf
.iplt
3041 || s
== htab
->elf
.igotplt
3042 || s
== htab
->plt_got
3043 || s
== htab
->plt_eh_frame
3044 || s
== htab
->sdynbss
)
3046 /* Strip these too. */
3048 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3051 && s
!= htab
->elf
.srelplt
3052 && s
!= htab
->srelplt2
)
3055 /* We use the reloc_count field as a counter if we need
3056 to copy relocs into the output file. */
3061 /* It's not one of our sections, so don't allocate space. */
3067 /* If we don't need this section, strip it from the
3068 output file. This is mostly to handle .rel.bss and
3069 .rel.plt. We must create both sections in
3070 create_dynamic_sections, because they must be created
3071 before the linker maps input sections to output
3072 sections. The linker does that before
3073 adjust_dynamic_symbol is called, and it is that
3074 function which decides whether anything needs to go
3075 into these sections. */
3077 s
->flags
|= SEC_EXCLUDE
;
3081 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3084 /* Allocate memory for the section contents. We use bfd_zalloc
3085 here in case unused entries are not reclaimed before the
3086 section's contents are written out. This should not happen,
3087 but this way if it does, we get a R_386_NONE reloc instead
3089 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3090 if (s
->contents
== NULL
)
3094 if (htab
->plt_eh_frame
!= NULL
3095 && htab
->plt_eh_frame
->contents
!= NULL
)
3097 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3098 sizeof (elf_i386_eh_frame_plt
));
3099 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3100 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3103 if (htab
->elf
.dynamic_sections_created
)
3105 /* Add some entries to the .dynamic section. We fill in the
3106 values later, in elf_i386_finish_dynamic_sections, but we
3107 must add the entries now so that we get the correct size for
3108 the .dynamic section. The DT_DEBUG entry is filled in by the
3109 dynamic linker and used by the debugger. */
3110 #define add_dynamic_entry(TAG, VAL) \
3111 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3113 if (info
->executable
)
3115 if (!add_dynamic_entry (DT_DEBUG
, 0))
3119 if (htab
->elf
.splt
->size
!= 0)
3121 if (!add_dynamic_entry (DT_PLTGOT
, 0)
3122 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
3123 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3124 || !add_dynamic_entry (DT_JMPREL
, 0))
3130 if (!add_dynamic_entry (DT_REL
, 0)
3131 || !add_dynamic_entry (DT_RELSZ
, 0)
3132 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3135 /* If any dynamic relocs apply to a read-only section,
3136 then we need a DT_TEXTREL entry. */
3137 if ((info
->flags
& DF_TEXTREL
) == 0)
3138 elf_link_hash_traverse (&htab
->elf
,
3139 elf_i386_readonly_dynrelocs
, info
);
3141 if ((info
->flags
& DF_TEXTREL
) != 0)
3143 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3147 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3148 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3151 #undef add_dynamic_entry
3157 elf_i386_always_size_sections (bfd
*output_bfd
,
3158 struct bfd_link_info
*info
)
3160 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3164 struct elf_link_hash_entry
*tlsbase
;
3166 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3167 "_TLS_MODULE_BASE_",
3168 FALSE
, FALSE
, FALSE
);
3170 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3172 struct elf_i386_link_hash_table
*htab
;
3173 struct bfd_link_hash_entry
*bh
= NULL
;
3174 const struct elf_backend_data
*bed
3175 = get_elf_backend_data (output_bfd
);
3177 htab
= elf_i386_hash_table (info
);
3181 if (!(_bfd_generic_link_add_one_symbol
3182 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3183 tls_sec
, 0, NULL
, FALSE
,
3184 bed
->collect
, &bh
)))
3187 htab
->tls_module_base
= bh
;
3189 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3190 tlsbase
->def_regular
= 1;
3191 tlsbase
->other
= STV_HIDDEN
;
3192 tlsbase
->root
.linker_def
= 1;
3193 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3200 /* Set the correct type for an x86 ELF section. We do this by the
3201 section name, which is a hack, but ought to work. */
3204 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3205 Elf_Internal_Shdr
*hdr
,
3210 name
= bfd_get_section_name (abfd
, sec
);
3212 /* This is an ugly, but unfortunately necessary hack that is
3213 needed when producing EFI binaries on x86. It tells
3214 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3215 containing ELF relocation info. We need this hack in order to
3216 be able to generate ELF binaries that can be translated into
3217 EFI applications (which are essentially COFF objects). Those
3218 files contain a COFF ".reloc" section inside an ELFNN object,
3219 which would normally cause BFD to segfault because it would
3220 attempt to interpret this section as containing relocation
3221 entries for section "oc". With this hack enabled, ".reloc"
3222 will be treated as a normal data section, which will avoid the
3223 segfault. However, you won't be able to create an ELFNN binary
3224 with a section named "oc" that needs relocations, but that's
3225 the kind of ugly side-effects you get when detecting section
3226 types based on their names... In practice, this limitation is
3227 unlikely to bite. */
3228 if (strcmp (name
, ".reloc") == 0)
3229 hdr
->sh_type
= SHT_PROGBITS
;
3234 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3235 executables. Rather than setting it to the beginning of the TLS
3236 section, we have to set it to the end. This function may be called
3237 multiple times, it is idempotent. */
3240 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3242 struct elf_i386_link_hash_table
*htab
;
3243 struct bfd_link_hash_entry
*base
;
3245 if (!info
->executable
)
3248 htab
= elf_i386_hash_table (info
);
3252 base
= htab
->tls_module_base
;
3256 base
->u
.def
.value
= htab
->elf
.tls_size
;
3259 /* Return the base VMA address which should be subtracted from real addresses
3260 when resolving @dtpoff relocation.
3261 This is PT_TLS segment p_vaddr. */
3264 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3266 /* If tls_sec is NULL, we should have signalled an error already. */
3267 if (elf_hash_table (info
)->tls_sec
== NULL
)
3269 return elf_hash_table (info
)->tls_sec
->vma
;
3272 /* Return the relocation value for @tpoff relocation
3273 if STT_TLS virtual address is ADDRESS. */
3276 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3278 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3279 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3280 bfd_vma static_tls_size
;
3282 /* If tls_sec is NULL, we should have signalled an error already. */
3283 if (htab
->tls_sec
== NULL
)
3286 /* Consider special static TLS alignment requirements. */
3287 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3288 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3291 /* Relocate an i386 ELF section. */
3294 elf_i386_relocate_section (bfd
*output_bfd
,
3295 struct bfd_link_info
*info
,
3297 asection
*input_section
,
3299 Elf_Internal_Rela
*relocs
,
3300 Elf_Internal_Sym
*local_syms
,
3301 asection
**local_sections
)
3303 struct elf_i386_link_hash_table
*htab
;
3304 Elf_Internal_Shdr
*symtab_hdr
;
3305 struct elf_link_hash_entry
**sym_hashes
;
3306 bfd_vma
*local_got_offsets
;
3307 bfd_vma
*local_tlsdesc_gotents
;
3308 Elf_Internal_Rela
*rel
;
3309 Elf_Internal_Rela
*relend
;
3310 bfd_boolean is_vxworks_tls
;
3311 unsigned plt_entry_size
;
3313 BFD_ASSERT (is_i386_elf (input_bfd
));
3315 htab
= elf_i386_hash_table (info
);
3318 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3319 sym_hashes
= elf_sym_hashes (input_bfd
);
3320 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3321 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3322 /* We have to handle relocations in vxworks .tls_vars sections
3323 specially, because the dynamic loader is 'weird'. */
3324 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3326 && !strcmp (input_section
->output_section
->name
,
3329 elf_i386_set_tls_module_base (info
);
3331 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3334 relend
= relocs
+ input_section
->reloc_count
;
3335 for (; rel
< relend
; rel
++)
3337 unsigned int r_type
;
3338 reloc_howto_type
*howto
;
3339 unsigned long r_symndx
;
3340 struct elf_link_hash_entry
*h
;
3341 struct elf_i386_link_hash_entry
*eh
;
3342 Elf_Internal_Sym
*sym
;
3344 bfd_vma off
, offplt
, plt_offset
;
3346 bfd_boolean unresolved_reloc
;
3347 bfd_reloc_status_type r
;
3351 asection
*resolved_plt
;
3353 r_type
= ELF32_R_TYPE (rel
->r_info
);
3354 if (r_type
== R_386_GNU_VTINHERIT
3355 || r_type
== R_386_GNU_VTENTRY
)
3358 if ((indx
= r_type
) >= R_386_standard
3359 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3360 >= R_386_ext
- R_386_standard
)
3361 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3362 >= R_386_irelative
- R_386_ext
))
3364 (*_bfd_error_handler
)
3365 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3366 input_bfd
, input_section
, r_type
);
3367 bfd_set_error (bfd_error_bad_value
);
3370 howto
= elf_howto_table
+ indx
;
3372 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3376 unresolved_reloc
= FALSE
;
3377 if (r_symndx
< symtab_hdr
->sh_info
)
3379 sym
= local_syms
+ r_symndx
;
3380 sec
= local_sections
[r_symndx
];
3381 relocation
= (sec
->output_section
->vma
3382 + sec
->output_offset
3384 st_size
= sym
->st_size
;
3386 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3387 && ((sec
->flags
& SEC_MERGE
) != 0
3388 || (info
->relocatable
3389 && sec
->output_offset
!= 0)))
3392 bfd_byte
*where
= contents
+ rel
->r_offset
;
3394 switch (howto
->size
)
3397 addend
= bfd_get_8 (input_bfd
, where
);
3398 if (howto
->pc_relative
)
3400 addend
= (addend
^ 0x80) - 0x80;
3405 addend
= bfd_get_16 (input_bfd
, where
);
3406 if (howto
->pc_relative
)
3408 addend
= (addend
^ 0x8000) - 0x8000;
3413 addend
= bfd_get_32 (input_bfd
, where
);
3414 if (howto
->pc_relative
)
3416 addend
= (addend
^ 0x80000000) - 0x80000000;
3424 if (info
->relocatable
)
3425 addend
+= sec
->output_offset
;
3428 asection
*msec
= sec
;
3429 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3431 addend
-= relocation
;
3432 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3435 switch (howto
->size
)
3438 /* FIXME: overflow checks. */
3439 if (howto
->pc_relative
)
3441 bfd_put_8 (input_bfd
, addend
, where
);
3444 if (howto
->pc_relative
)
3446 bfd_put_16 (input_bfd
, addend
, where
);
3449 if (howto
->pc_relative
)
3451 bfd_put_32 (input_bfd
, addend
, where
);
3455 else if (!info
->relocatable
3456 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3458 /* Relocate against local STT_GNU_IFUNC symbol. */
3459 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3464 /* Set STT_GNU_IFUNC symbol value. */
3465 h
->root
.u
.def
.value
= sym
->st_value
;
3466 h
->root
.u
.def
.section
= sec
;
3471 bfd_boolean warned ATTRIBUTE_UNUSED
;
3472 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3474 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3475 r_symndx
, symtab_hdr
, sym_hashes
,
3477 unresolved_reloc
, warned
, ignored
);
3481 if (sec
!= NULL
&& discarded_section (sec
))
3482 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3483 rel
, 1, relend
, howto
, 0, contents
);
3485 if (info
->relocatable
)
3488 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3489 it here if it is defined in a non-shared object. */
3491 && h
->type
== STT_GNU_IFUNC
3494 asection
*plt
, *gotplt
, *base_got
;
3498 if ((input_section
->flags
& SEC_ALLOC
) == 0
3499 || h
->plt
.offset
== (bfd_vma
) -1)
3502 /* STT_GNU_IFUNC symbol must go through PLT. */
3503 if (htab
->elf
.splt
!= NULL
)
3505 plt
= htab
->elf
.splt
;
3506 gotplt
= htab
->elf
.sgotplt
;
3510 plt
= htab
->elf
.iplt
;
3511 gotplt
= htab
->elf
.igotplt
;
3514 relocation
= (plt
->output_section
->vma
3515 + plt
->output_offset
+ h
->plt
.offset
);
3520 if (h
->root
.root
.string
)
3521 name
= h
->root
.root
.string
;
3523 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3525 (*_bfd_error_handler
)
3526 (_("%B: relocation %s against STT_GNU_IFUNC "
3527 "symbol `%s' isn't handled by %s"), input_bfd
,
3528 elf_howto_table
[r_type
].name
,
3529 name
, __FUNCTION__
);
3530 bfd_set_error (bfd_error_bad_value
);
3534 /* Generate dynamic relcoation only when there is a
3535 non-GOT reference in a shared object. */
3536 if (info
->shared
&& h
->non_got_ref
)
3538 Elf_Internal_Rela outrel
;
3542 /* Need a dynamic relocation to get the real function
3544 offset
= _bfd_elf_section_offset (output_bfd
,
3548 if (offset
== (bfd_vma
) -1
3549 || offset
== (bfd_vma
) -2)
3552 outrel
.r_offset
= (input_section
->output_section
->vma
3553 + input_section
->output_offset
3556 if (h
->dynindx
== -1
3558 || info
->executable
)
3560 /* This symbol is resolved locally. */
3561 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3562 bfd_put_32 (output_bfd
,
3563 (h
->root
.u
.def
.value
3564 + h
->root
.u
.def
.section
->output_section
->vma
3565 + h
->root
.u
.def
.section
->output_offset
),
3569 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3571 sreloc
= htab
->elf
.irelifunc
;
3572 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3574 /* If this reloc is against an external symbol, we
3575 do not want to fiddle with the addend. Otherwise,
3576 we need to include the symbol value so that it
3577 becomes an addend for the dynamic reloc. For an
3578 internal symbol, we have updated addend. */
3587 base_got
= htab
->elf
.sgot
;
3588 off
= h
->got
.offset
;
3590 if (base_got
== NULL
)
3593 if (off
== (bfd_vma
) -1)
3595 /* We can't use h->got.offset here to save state, or
3596 even just remember the offset, as finish_dynamic_symbol
3597 would use that as offset into .got. */
3599 if (htab
->elf
.splt
!= NULL
)
3601 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3602 off
= (plt_index
+ 3) * 4;
3603 base_got
= htab
->elf
.sgotplt
;
3607 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3608 off
= plt_index
* 4;
3609 base_got
= htab
->elf
.igotplt
;
3612 if (h
->dynindx
== -1
3616 /* This references the local defitionion. We must
3617 initialize this entry in the global offset table.
3618 Since the offset must always be a multiple of 8,
3619 we use the least significant bit to record
3620 whether we have initialized it already.
3622 When doing a dynamic link, we create a .rela.got
3623 relocation entry to initialize the value. This
3624 is done in the finish_dynamic_symbol routine. */
3629 bfd_put_32 (output_bfd
, relocation
,
3630 base_got
->contents
+ off
);
3637 /* Adjust for static executables. */
3638 if (htab
->elf
.splt
== NULL
)
3639 relocation
+= gotplt
->output_offset
;
3643 relocation
= (base_got
->output_section
->vma
3644 + base_got
->output_offset
+ off
3645 - gotplt
->output_section
->vma
3646 - gotplt
->output_offset
);
3647 /* Adjust for static executables. */
3648 if (htab
->elf
.splt
== NULL
)
3649 relocation
+= gotplt
->output_offset
;
3655 relocation
-= (gotplt
->output_section
->vma
3656 + gotplt
->output_offset
);
3664 /* Relocation is to the entry for this symbol in the global
3666 if (htab
->elf
.sgot
== NULL
)
3673 off
= h
->got
.offset
;
3674 dyn
= htab
->elf
.dynamic_sections_created
;
3675 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3677 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3678 || (ELF_ST_VISIBILITY (h
->other
)
3679 && h
->root
.type
== bfd_link_hash_undefweak
))
3681 /* This is actually a static link, or it is a
3682 -Bsymbolic link and the symbol is defined
3683 locally, or the symbol was forced to be local
3684 because of a version file. We must initialize
3685 this entry in the global offset table. Since the
3686 offset must always be a multiple of 4, we use the
3687 least significant bit to record whether we have
3688 initialized it already.
3690 When doing a dynamic link, we create a .rel.got
3691 relocation entry to initialize the value. This
3692 is done in the finish_dynamic_symbol routine. */
3697 bfd_put_32 (output_bfd
, relocation
,
3698 htab
->elf
.sgot
->contents
+ off
);
3703 unresolved_reloc
= FALSE
;
3707 if (local_got_offsets
== NULL
)
3710 off
= local_got_offsets
[r_symndx
];
3712 /* The offset must always be a multiple of 4. We use
3713 the least significant bit to record whether we have
3714 already generated the necessary reloc. */
3719 bfd_put_32 (output_bfd
, relocation
,
3720 htab
->elf
.sgot
->contents
+ off
);
3725 Elf_Internal_Rela outrel
;
3727 s
= htab
->elf
.srelgot
;
3731 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3732 + htab
->elf
.sgot
->output_offset
3734 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3735 elf_append_rel (output_bfd
, s
, &outrel
);
3738 local_got_offsets
[r_symndx
] |= 1;
3742 if (off
>= (bfd_vma
) -2)
3745 relocation
= htab
->elf
.sgot
->output_section
->vma
3746 + htab
->elf
.sgot
->output_offset
+ off
3747 - htab
->elf
.sgotplt
->output_section
->vma
3748 - htab
->elf
.sgotplt
->output_offset
;
3752 /* Relocation is relative to the start of the global offset
3755 /* Check to make sure it isn't a protected function or data
3756 symbol for shared library since it may not be local when
3757 used as function address or with copy relocation. We also
3758 need to make sure that a symbol is referenced locally. */
3759 if (!info
->executable
&& h
)
3761 if (!h
->def_regular
)
3765 switch (ELF_ST_VISIBILITY (h
->other
))
3768 v
= _("hidden symbol");
3771 v
= _("internal symbol");
3774 v
= _("protected symbol");
3781 (*_bfd_error_handler
)
3782 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3783 input_bfd
, v
, h
->root
.root
.string
);
3784 bfd_set_error (bfd_error_bad_value
);
3787 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
3788 && (h
->type
== STT_FUNC
3789 || h
->type
== STT_OBJECT
)
3790 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3792 (*_bfd_error_handler
)
3793 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
3795 h
->type
== STT_FUNC
? "function" : "data",
3796 h
->root
.root
.string
);
3797 bfd_set_error (bfd_error_bad_value
);
3802 /* Note that sgot is not involved in this
3803 calculation. We always want the start of .got.plt. If we
3804 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3805 permitted by the ABI, we might have to change this
3807 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3808 + htab
->elf
.sgotplt
->output_offset
;
3812 /* Use global offset table as symbol value. */
3813 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3814 + htab
->elf
.sgotplt
->output_offset
;
3815 unresolved_reloc
= FALSE
;
3819 /* Relocation is to the entry for this symbol in the
3820 procedure linkage table. */
3822 /* Resolve a PLT32 reloc against a local symbol directly,
3823 without using the procedure linkage table. */
3827 eh
= (struct elf_i386_link_hash_entry
*) h
;
3828 if ((h
->plt
.offset
== (bfd_vma
) -1
3829 && eh
->plt_got
.offset
== (bfd_vma
) -1)
3830 || htab
->elf
.splt
== NULL
)
3832 /* We didn't make a PLT entry for this symbol. This
3833 happens when statically linking PIC code, or when
3834 using -Bsymbolic. */
3838 if (h
->plt
.offset
!= (bfd_vma
) -1)
3840 resolved_plt
= htab
->elf
.splt
;
3841 plt_offset
= h
->plt
.offset
;
3845 resolved_plt
= htab
->plt_got
;
3846 plt_offset
= eh
->plt_got
.offset
;
3849 relocation
= (resolved_plt
->output_section
->vma
3850 + resolved_plt
->output_offset
3852 unresolved_reloc
= FALSE
;
3856 /* Set to symbol size. */
3857 relocation
= st_size
;
3862 if ((input_section
->flags
& SEC_ALLOC
) == 0
3868 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3869 || h
->root
.type
!= bfd_link_hash_undefweak
)
3870 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3871 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3872 || (ELIMINATE_COPY_RELOCS
3879 || h
->root
.type
== bfd_link_hash_undefweak
3880 || h
->root
.type
== bfd_link_hash_undefined
)))
3882 Elf_Internal_Rela outrel
;
3883 bfd_boolean skip
, relocate
;
3886 /* When generating a shared object, these relocations
3887 are copied into the output file to be resolved at run
3894 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3896 if (outrel
.r_offset
== (bfd_vma
) -1)
3898 else if (outrel
.r_offset
== (bfd_vma
) -2)
3899 skip
= TRUE
, relocate
= TRUE
;
3900 outrel
.r_offset
+= (input_section
->output_section
->vma
3901 + input_section
->output_offset
);
3904 memset (&outrel
, 0, sizeof outrel
);
3907 && (r_type
== R_386_PC32
3909 || !SYMBOLIC_BIND (info
, h
)
3910 || !h
->def_regular
))
3911 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3914 /* This symbol is local, or marked to become local. */
3916 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3919 sreloc
= elf_section_data (input_section
)->sreloc
;
3921 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3923 r
= bfd_reloc_notsupported
;
3924 goto check_relocation_error
;
3927 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3929 /* If this reloc is against an external symbol, we do
3930 not want to fiddle with the addend. Otherwise, we
3931 need to include the symbol value so that it becomes
3932 an addend for the dynamic reloc. */
3939 if (!info
->executable
)
3941 Elf_Internal_Rela outrel
;
3944 outrel
.r_offset
= rel
->r_offset
3945 + input_section
->output_section
->vma
3946 + input_section
->output_offset
;
3947 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3948 sreloc
= elf_section_data (input_section
)->sreloc
;
3951 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3956 case R_386_TLS_GOTDESC
:
3957 case R_386_TLS_DESC_CALL
:
3958 case R_386_TLS_IE_32
:
3959 case R_386_TLS_GOTIE
:
3960 tls_type
= GOT_UNKNOWN
;
3961 if (h
== NULL
&& local_got_offsets
)
3962 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3964 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3965 if (tls_type
== GOT_TLS_IE
)
3966 tls_type
= GOT_TLS_IE_NEG
;
3968 if (! elf_i386_tls_transition (info
, input_bfd
,
3969 input_section
, contents
,
3970 symtab_hdr
, sym_hashes
,
3971 &r_type
, tls_type
, rel
,
3972 relend
, h
, r_symndx
))
3975 if (r_type
== R_386_TLS_LE_32
)
3977 BFD_ASSERT (! unresolved_reloc
);
3978 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3983 /* GD->LE transition. */
3984 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3987 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3989 movl %gs:0, %eax; subl $foo@tpoff, %eax
3990 (6 byte form of subl). */
3991 memcpy (contents
+ rel
->r_offset
- 3,
3992 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3993 roff
= rel
->r_offset
+ 5;
3997 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3999 movl %gs:0, %eax; subl $foo@tpoff, %eax
4000 (6 byte form of subl). */
4001 memcpy (contents
+ rel
->r_offset
- 2,
4002 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4003 roff
= rel
->r_offset
+ 6;
4005 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4007 /* Skip R_386_PC32/R_386_PLT32. */
4011 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4013 /* GDesc -> LE transition.
4014 It's originally something like:
4015 leal x@tlsdesc(%ebx), %eax
4019 Registers other than %eax may be set up here. */
4024 roff
= rel
->r_offset
;
4025 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4027 /* Now modify the instruction as appropriate. */
4028 /* aoliva FIXME: remove the above and xor the byte
4030 bfd_put_8 (output_bfd
, val
^ 0x86,
4031 contents
+ roff
- 1);
4032 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4036 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4038 /* GDesc -> LE transition.
4046 roff
= rel
->r_offset
;
4047 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4048 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4051 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4055 /* IE->LE transition:
4056 Originally it can be one of:
4064 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4067 /* movl foo, %eax. */
4068 bfd_put_8 (output_bfd
, 0xb8,
4069 contents
+ rel
->r_offset
- 1);
4075 type
= bfd_get_8 (input_bfd
,
4076 contents
+ rel
->r_offset
- 2);
4081 bfd_put_8 (output_bfd
, 0xc7,
4082 contents
+ rel
->r_offset
- 2);
4083 bfd_put_8 (output_bfd
,
4084 0xc0 | ((val
>> 3) & 7),
4085 contents
+ rel
->r_offset
- 1);
4089 bfd_put_8 (output_bfd
, 0x81,
4090 contents
+ rel
->r_offset
- 2);
4091 bfd_put_8 (output_bfd
,
4092 0xc0 | ((val
>> 3) & 7),
4093 contents
+ rel
->r_offset
- 1);
4100 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4101 contents
+ rel
->r_offset
);
4106 unsigned int val
, type
;
4108 /* {IE_32,GOTIE}->LE transition:
4109 Originally it can be one of:
4110 subl foo(%reg1), %reg2
4111 movl foo(%reg1), %reg2
4112 addl foo(%reg1), %reg2
4115 movl $foo, %reg2 (6 byte form)
4116 addl $foo, %reg2. */
4117 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4118 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4122 bfd_put_8 (output_bfd
, 0xc7,
4123 contents
+ rel
->r_offset
- 2);
4124 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4125 contents
+ rel
->r_offset
- 1);
4127 else if (type
== 0x2b)
4130 bfd_put_8 (output_bfd
, 0x81,
4131 contents
+ rel
->r_offset
- 2);
4132 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4133 contents
+ rel
->r_offset
- 1);
4135 else if (type
== 0x03)
4138 bfd_put_8 (output_bfd
, 0x81,
4139 contents
+ rel
->r_offset
- 2);
4140 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4141 contents
+ rel
->r_offset
- 1);
4145 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4146 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4147 contents
+ rel
->r_offset
);
4149 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4150 contents
+ rel
->r_offset
);
4155 if (htab
->elf
.sgot
== NULL
)
4160 off
= h
->got
.offset
;
4161 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4165 if (local_got_offsets
== NULL
)
4168 off
= local_got_offsets
[r_symndx
];
4169 offplt
= local_tlsdesc_gotents
[r_symndx
];
4176 Elf_Internal_Rela outrel
;
4180 if (htab
->elf
.srelgot
== NULL
)
4183 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4185 if (GOT_TLS_GDESC_P (tls_type
))
4188 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4189 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4190 <= htab
->elf
.sgotplt
->size
);
4191 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4192 + htab
->elf
.sgotplt
->output_offset
4194 + htab
->sgotplt_jump_table_size
);
4195 sreloc
= htab
->elf
.srelplt
;
4196 loc
= sreloc
->contents
;
4197 loc
+= (htab
->next_tls_desc_index
++
4198 * sizeof (Elf32_External_Rel
));
4199 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4200 <= sreloc
->contents
+ sreloc
->size
);
4201 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4204 BFD_ASSERT (! unresolved_reloc
);
4205 bfd_put_32 (output_bfd
,
4206 relocation
- elf_i386_dtpoff_base (info
),
4207 htab
->elf
.sgotplt
->contents
+ offplt
4208 + htab
->sgotplt_jump_table_size
+ 4);
4212 bfd_put_32 (output_bfd
, 0,
4213 htab
->elf
.sgotplt
->contents
+ offplt
4214 + htab
->sgotplt_jump_table_size
+ 4);
4218 sreloc
= htab
->elf
.srelgot
;
4220 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4221 + htab
->elf
.sgot
->output_offset
+ off
);
4223 if (GOT_TLS_GD_P (tls_type
))
4224 dr_type
= R_386_TLS_DTPMOD32
;
4225 else if (GOT_TLS_GDESC_P (tls_type
))
4227 else if (tls_type
== GOT_TLS_IE_POS
)
4228 dr_type
= R_386_TLS_TPOFF
;
4230 dr_type
= R_386_TLS_TPOFF32
;
4232 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4233 bfd_put_32 (output_bfd
,
4234 relocation
- elf_i386_dtpoff_base (info
),
4235 htab
->elf
.sgot
->contents
+ off
);
4236 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4237 bfd_put_32 (output_bfd
,
4238 elf_i386_dtpoff_base (info
) - relocation
,
4239 htab
->elf
.sgot
->contents
+ off
);
4240 else if (dr_type
!= R_386_TLS_DESC
)
4241 bfd_put_32 (output_bfd
, 0,
4242 htab
->elf
.sgot
->contents
+ off
);
4243 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4245 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4247 if (GOT_TLS_GD_P (tls_type
))
4251 BFD_ASSERT (! unresolved_reloc
);
4252 bfd_put_32 (output_bfd
,
4253 relocation
- elf_i386_dtpoff_base (info
),
4254 htab
->elf
.sgot
->contents
+ off
+ 4);
4258 bfd_put_32 (output_bfd
, 0,
4259 htab
->elf
.sgot
->contents
+ off
+ 4);
4260 outrel
.r_info
= ELF32_R_INFO (indx
,
4261 R_386_TLS_DTPOFF32
);
4262 outrel
.r_offset
+= 4;
4263 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4266 else if (tls_type
== GOT_TLS_IE_BOTH
)
4268 bfd_put_32 (output_bfd
,
4270 ? relocation
- elf_i386_dtpoff_base (info
)
4272 htab
->elf
.sgot
->contents
+ off
+ 4);
4273 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4274 outrel
.r_offset
+= 4;
4275 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4282 local_got_offsets
[r_symndx
] |= 1;
4285 if (off
>= (bfd_vma
) -2
4286 && ! GOT_TLS_GDESC_P (tls_type
))
4288 if (r_type
== R_386_TLS_GOTDESC
4289 || r_type
== R_386_TLS_DESC_CALL
)
4291 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4292 unresolved_reloc
= FALSE
;
4294 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4296 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4297 + htab
->elf
.sgotplt
->output_offset
;
4298 relocation
= htab
->elf
.sgot
->output_section
->vma
4299 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4300 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4301 && tls_type
== GOT_TLS_IE_BOTH
)
4303 if (r_type
== R_386_TLS_IE
)
4304 relocation
+= g_o_t
;
4305 unresolved_reloc
= FALSE
;
4307 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4309 unsigned int val
, type
;
4312 /* GD->IE transition. */
4313 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4314 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4317 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4319 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4321 roff
= rel
->r_offset
- 3;
4325 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4327 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4328 roff
= rel
->r_offset
- 2;
4330 memcpy (contents
+ roff
,
4331 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4332 contents
[roff
+ 7] = 0x80 | (val
& 7);
4333 /* If foo is used only with foo@gotntpoff(%reg) and
4334 foo@indntpoff, but not with foo@gottpoff(%reg), change
4335 subl $foo@gottpoff(%reg), %eax
4337 addl $foo@gotntpoff(%reg), %eax. */
4338 if (tls_type
== GOT_TLS_IE_POS
)
4339 contents
[roff
+ 6] = 0x03;
4340 bfd_put_32 (output_bfd
,
4341 htab
->elf
.sgot
->output_section
->vma
4342 + htab
->elf
.sgot
->output_offset
+ off
4343 - htab
->elf
.sgotplt
->output_section
->vma
4344 - htab
->elf
.sgotplt
->output_offset
,
4345 contents
+ roff
+ 8);
4346 /* Skip R_386_PLT32. */
4350 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4352 /* GDesc -> IE transition.
4353 It's originally something like:
4354 leal x@tlsdesc(%ebx), %eax
4357 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4359 movl x@gottpoff(%ebx), %eax # before negl %eax
4361 Registers other than %eax may be set up here. */
4365 /* First, make sure it's a leal adding ebx to a 32-bit
4366 offset into any register, although it's probably
4367 almost always going to be eax. */
4368 roff
= rel
->r_offset
;
4370 /* Now modify the instruction as appropriate. */
4371 /* To turn a leal into a movl in the form we use it, it
4372 suffices to change the first byte from 0x8d to 0x8b.
4373 aoliva FIXME: should we decide to keep the leal, all
4374 we have to do is remove the statement below, and
4375 adjust the relaxation of R_386_TLS_DESC_CALL. */
4376 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4378 if (tls_type
== GOT_TLS_IE_BOTH
)
4381 bfd_put_32 (output_bfd
,
4382 htab
->elf
.sgot
->output_section
->vma
4383 + htab
->elf
.sgot
->output_offset
+ off
4384 - htab
->elf
.sgotplt
->output_section
->vma
4385 - htab
->elf
.sgotplt
->output_offset
,
4389 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4391 /* GDesc -> IE transition.
4399 depending on how we transformed the TLS_GOTDESC above.
4404 roff
= rel
->r_offset
;
4406 /* Now modify the instruction as appropriate. */
4407 if (tls_type
!= GOT_TLS_IE_NEG
)
4410 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4411 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4416 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4417 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4427 if (! elf_i386_tls_transition (info
, input_bfd
,
4428 input_section
, contents
,
4429 symtab_hdr
, sym_hashes
,
4430 &r_type
, GOT_UNKNOWN
, rel
,
4431 relend
, h
, r_symndx
))
4434 if (r_type
!= R_386_TLS_LDM
)
4436 /* LD->LE transition:
4437 leal foo(%reg), %eax; call ___tls_get_addr.
4439 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4440 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4441 memcpy (contents
+ rel
->r_offset
- 2,
4442 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4443 /* Skip R_386_PC32/R_386_PLT32. */
4448 if (htab
->elf
.sgot
== NULL
)
4451 off
= htab
->tls_ldm_got
.offset
;
4456 Elf_Internal_Rela outrel
;
4458 if (htab
->elf
.srelgot
== NULL
)
4461 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4462 + htab
->elf
.sgot
->output_offset
+ off
);
4464 bfd_put_32 (output_bfd
, 0,
4465 htab
->elf
.sgot
->contents
+ off
);
4466 bfd_put_32 (output_bfd
, 0,
4467 htab
->elf
.sgot
->contents
+ off
+ 4);
4468 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4469 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4470 htab
->tls_ldm_got
.offset
|= 1;
4472 relocation
= htab
->elf
.sgot
->output_section
->vma
4473 + htab
->elf
.sgot
->output_offset
+ off
4474 - htab
->elf
.sgotplt
->output_section
->vma
4475 - htab
->elf
.sgotplt
->output_offset
;
4476 unresolved_reloc
= FALSE
;
4479 case R_386_TLS_LDO_32
:
4480 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4481 relocation
-= elf_i386_dtpoff_base (info
);
4483 /* When converting LDO to LE, we must negate. */
4484 relocation
= -elf_i386_tpoff (info
, relocation
);
4487 case R_386_TLS_LE_32
:
4489 if (!info
->executable
)
4491 Elf_Internal_Rela outrel
;
4494 outrel
.r_offset
= rel
->r_offset
4495 + input_section
->output_section
->vma
4496 + input_section
->output_offset
;
4497 if (h
!= NULL
&& h
->dynindx
!= -1)
4501 if (r_type
== R_386_TLS_LE_32
)
4502 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4504 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4505 sreloc
= elf_section_data (input_section
)->sreloc
;
4508 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4511 else if (r_type
== R_386_TLS_LE_32
)
4512 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4514 relocation
-= elf_i386_dtpoff_base (info
);
4516 else if (r_type
== R_386_TLS_LE_32
)
4517 relocation
= elf_i386_tpoff (info
, relocation
);
4519 relocation
= -elf_i386_tpoff (info
, relocation
);
4526 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4527 because such sections are not SEC_ALLOC and thus ld.so will
4528 not process them. */
4529 if (unresolved_reloc
4530 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4532 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4533 rel
->r_offset
) != (bfd_vma
) -1)
4535 (*_bfd_error_handler
)
4536 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4539 (long) rel
->r_offset
,
4541 h
->root
.root
.string
);
4546 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4547 contents
, rel
->r_offset
,
4550 check_relocation_error
:
4551 if (r
!= bfd_reloc_ok
)
4556 name
= h
->root
.root
.string
;
4559 name
= bfd_elf_string_from_elf_section (input_bfd
,
4560 symtab_hdr
->sh_link
,
4565 name
= bfd_section_name (input_bfd
, sec
);
4568 if (r
== bfd_reloc_overflow
)
4570 if (! ((*info
->callbacks
->reloc_overflow
)
4571 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4572 (bfd_vma
) 0, input_bfd
, input_section
,
4578 (*_bfd_error_handler
)
4579 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4580 input_bfd
, input_section
,
4581 (long) rel
->r_offset
, name
, (int) r
);
4590 /* Finish up dynamic symbol handling. We set the contents of various
4591 dynamic sections here. */
4594 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4595 struct bfd_link_info
*info
,
4596 struct elf_link_hash_entry
*h
,
4597 Elf_Internal_Sym
*sym
)
4599 struct elf_i386_link_hash_table
*htab
;
4600 unsigned plt_entry_size
;
4601 const struct elf_i386_backend_data
*abed
;
4602 struct elf_i386_link_hash_entry
*eh
;
4604 htab
= elf_i386_hash_table (info
);
4608 abed
= get_elf_i386_backend_data (output_bfd
);
4609 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4611 eh
= (struct elf_i386_link_hash_entry
*) h
;
4613 if (h
->plt
.offset
!= (bfd_vma
) -1)
4617 Elf_Internal_Rela rel
;
4619 asection
*plt
, *gotplt
, *relplt
;
4621 /* When building a static executable, use .iplt, .igot.plt and
4622 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4623 if (htab
->elf
.splt
!= NULL
)
4625 plt
= htab
->elf
.splt
;
4626 gotplt
= htab
->elf
.sgotplt
;
4627 relplt
= htab
->elf
.srelplt
;
4631 plt
= htab
->elf
.iplt
;
4632 gotplt
= htab
->elf
.igotplt
;
4633 relplt
= htab
->elf
.irelplt
;
4636 /* This symbol has an entry in the procedure linkage table. Set
4639 if ((h
->dynindx
== -1
4640 && !((h
->forced_local
|| info
->executable
)
4642 && h
->type
== STT_GNU_IFUNC
))
4648 /* Get the index in the procedure linkage table which
4649 corresponds to this symbol. This is the index of this symbol
4650 in all the symbols for which we are making plt entries. The
4651 first entry in the procedure linkage table is reserved.
4653 Get the offset into the .got table of the entry that
4654 corresponds to this function. Each .got entry is 4 bytes.
4655 The first three are reserved.
4657 For static executables, we don't reserve anything. */
4659 if (plt
== htab
->elf
.splt
)
4661 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4662 got_offset
= (got_offset
+ 3) * 4;
4666 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4667 got_offset
= got_offset
* 4;
4670 /* Fill in the entry in the procedure linkage table. */
4673 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4674 abed
->plt
->plt_entry_size
);
4675 bfd_put_32 (output_bfd
,
4676 (gotplt
->output_section
->vma
4677 + gotplt
->output_offset
4679 plt
->contents
+ h
->plt
.offset
4680 + abed
->plt
->plt_got_offset
);
4682 if (abed
->is_vxworks
)
4684 int s
, k
, reloc_index
;
4686 /* Create the R_386_32 relocation referencing the GOT
4687 for this PLT entry. */
4689 /* S: Current slot number (zero-based). */
4690 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4691 / abed
->plt
->plt_entry_size
);
4692 /* K: Number of relocations for PLTResolve. */
4694 k
= PLTRESOLVE_RELOCS_SHLIB
;
4696 k
= PLTRESOLVE_RELOCS
;
4697 /* Skip the PLTresolve relocations, and the relocations for
4698 the other PLT slots. */
4699 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4700 loc
= (htab
->srelplt2
->contents
+ reloc_index
4701 * sizeof (Elf32_External_Rel
));
4703 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4704 + htab
->elf
.splt
->output_offset
4705 + h
->plt
.offset
+ 2),
4706 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4707 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4709 /* Create the R_386_32 relocation referencing the beginning of
4710 the PLT for this GOT entry. */
4711 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4712 + htab
->elf
.sgotplt
->output_offset
4714 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4715 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4716 loc
+ sizeof (Elf32_External_Rel
));
4721 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4722 abed
->plt
->plt_entry_size
);
4723 bfd_put_32 (output_bfd
, got_offset
,
4724 plt
->contents
+ h
->plt
.offset
4725 + abed
->plt
->plt_got_offset
);
4728 /* Fill in the entry in the global offset table. */
4729 bfd_put_32 (output_bfd
,
4730 (plt
->output_section
->vma
4731 + plt
->output_offset
4733 + abed
->plt
->plt_lazy_offset
),
4734 gotplt
->contents
+ got_offset
);
4736 /* Fill in the entry in the .rel.plt section. */
4737 rel
.r_offset
= (gotplt
->output_section
->vma
4738 + gotplt
->output_offset
4740 if (h
->dynindx
== -1
4741 || ((info
->executable
4742 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4744 && h
->type
== STT_GNU_IFUNC
))
4746 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4747 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4748 in the .got.plt section. */
4749 bfd_put_32 (output_bfd
,
4750 (h
->root
.u
.def
.value
4751 + h
->root
.u
.def
.section
->output_section
->vma
4752 + h
->root
.u
.def
.section
->output_offset
),
4753 gotplt
->contents
+ got_offset
);
4754 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4755 /* R_386_IRELATIVE comes last. */
4756 plt_index
= htab
->next_irelative_index
--;
4760 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4761 plt_index
= htab
->next_jump_slot_index
++;
4763 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4764 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4766 /* Don't fill PLT entry for static executables. */
4767 if (plt
== htab
->elf
.splt
)
4769 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4770 plt
->contents
+ h
->plt
.offset
4771 + abed
->plt
->plt_reloc_offset
);
4772 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4773 + abed
->plt
->plt_plt_offset
+ 4),
4774 plt
->contents
+ h
->plt
.offset
4775 + abed
->plt
->plt_plt_offset
);
4778 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
4780 bfd_vma got_offset
, plt_offset
;
4781 asection
*plt
, *got
, *gotplt
;
4782 const bfd_byte
*got_plt_entry
;
4784 /* Offset of displacement of the indirect jump. */
4785 bfd_vma plt_got_offset
= 2;
4787 /* Set the entry in the GOT procedure linkage table. */
4788 plt
= htab
->plt_got
;
4789 got
= htab
->elf
.sgot
;
4790 gotplt
= htab
->elf
.sgotplt
;
4791 got_offset
= h
->got
.offset
;
4793 if (got_offset
== (bfd_vma
) -1
4799 /* Fill in the entry in the GOT procedure linkage table. */
4802 got_plt_entry
= elf_i386_got_plt_entry
;
4803 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
4807 got_plt_entry
= elf_i386_pic_got_plt_entry
;
4808 got_offset
+= (got
->output_section
->vma
4809 + got
->output_offset
4810 - gotplt
->output_section
->vma
4811 - gotplt
->output_offset
);
4814 plt_offset
= eh
->plt_got
.offset
;
4815 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
4816 sizeof (elf_i386_got_plt_entry
));
4817 bfd_put_32 (output_bfd
, got_offset
,
4818 plt
->contents
+ plt_offset
+ plt_got_offset
);
4822 && (h
->plt
.offset
!= (bfd_vma
) -1
4823 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
4825 /* Mark the symbol as undefined, rather than as defined in
4826 the .plt section. Leave the value if there were any
4827 relocations where pointer equality matters (this is a clue
4828 for the dynamic linker, to make function pointer
4829 comparisons work between an application and shared
4830 library), otherwise set it to zero. If a function is only
4831 called from a binary, there is no need to slow down
4832 shared libraries because of that. */
4833 sym
->st_shndx
= SHN_UNDEF
;
4834 if (!h
->pointer_equality_needed
)
4838 if (h
->got
.offset
!= (bfd_vma
) -1
4839 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4840 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4842 Elf_Internal_Rela rel
;
4844 /* This symbol has an entry in the global offset table. Set it
4847 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4850 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4851 + htab
->elf
.sgot
->output_offset
4852 + (h
->got
.offset
& ~(bfd_vma
) 1));
4854 /* If this is a static link, or it is a -Bsymbolic link and the
4855 symbol is defined locally or was forced to be local because
4856 of a version file, we just want to emit a RELATIVE reloc.
4857 The entry in the global offset table will already have been
4858 initialized in the relocate_section function. */
4860 && h
->type
== STT_GNU_IFUNC
)
4864 /* Generate R_386_GLOB_DAT. */
4871 if (!h
->pointer_equality_needed
)
4874 /* For non-shared object, we can't use .got.plt, which
4875 contains the real function addres if we need pointer
4876 equality. We load the GOT entry with the PLT entry. */
4877 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4878 bfd_put_32 (output_bfd
,
4879 (plt
->output_section
->vma
4880 + plt
->output_offset
+ h
->plt
.offset
),
4881 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4885 else if (info
->shared
4886 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4888 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4889 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4893 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4895 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4896 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4897 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4900 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4905 Elf_Internal_Rela rel
;
4907 /* This symbol needs a copy reloc. Set it up. */
4909 if (h
->dynindx
== -1
4910 || (h
->root
.type
!= bfd_link_hash_defined
4911 && h
->root
.type
!= bfd_link_hash_defweak
)
4912 || htab
->srelbss
== NULL
)
4915 rel
.r_offset
= (h
->root
.u
.def
.value
4916 + h
->root
.u
.def
.section
->output_section
->vma
4917 + h
->root
.u
.def
.section
->output_offset
);
4918 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4919 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4925 /* Finish up local dynamic symbol handling. We set the contents of
4926 various dynamic sections here. */
4929 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4931 struct elf_link_hash_entry
*h
4932 = (struct elf_link_hash_entry
*) *slot
;
4933 struct bfd_link_info
*info
4934 = (struct bfd_link_info
*) inf
;
4936 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4940 /* Used to decide how to sort relocs in an optimal manner for the
4941 dynamic linker, before writing them out. */
4943 static enum elf_reloc_type_class
4944 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4945 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4946 const Elf_Internal_Rela
*rela
)
4948 switch (ELF32_R_TYPE (rela
->r_info
))
4950 case R_386_RELATIVE
:
4951 return reloc_class_relative
;
4952 case R_386_JUMP_SLOT
:
4953 return reloc_class_plt
;
4955 return reloc_class_copy
;
4957 return reloc_class_normal
;
4961 /* Finish up the dynamic sections. */
4964 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4965 struct bfd_link_info
*info
)
4967 struct elf_i386_link_hash_table
*htab
;
4970 const struct elf_i386_backend_data
*abed
;
4972 htab
= elf_i386_hash_table (info
);
4976 dynobj
= htab
->elf
.dynobj
;
4977 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4978 abed
= get_elf_i386_backend_data (output_bfd
);
4980 if (htab
->elf
.dynamic_sections_created
)
4982 Elf32_External_Dyn
*dyncon
, *dynconend
;
4984 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4987 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4988 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4989 for (; dyncon
< dynconend
; dyncon
++)
4991 Elf_Internal_Dyn dyn
;
4994 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4999 if (abed
->is_vxworks
5000 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5005 s
= htab
->elf
.sgotplt
;
5006 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5010 s
= htab
->elf
.srelplt
;
5011 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5015 s
= htab
->elf
.srelplt
;
5016 dyn
.d_un
.d_val
= s
->size
;
5020 /* My reading of the SVR4 ABI indicates that the
5021 procedure linkage table relocs (DT_JMPREL) should be
5022 included in the overall relocs (DT_REL). This is
5023 what Solaris does. However, UnixWare can not handle
5024 that case. Therefore, we override the DT_RELSZ entry
5025 here to make it not include the JMPREL relocs. */
5026 s
= htab
->elf
.srelplt
;
5029 dyn
.d_un
.d_val
-= s
->size
;
5033 /* We may not be using the standard ELF linker script.
5034 If .rel.plt is the first .rel section, we adjust
5035 DT_REL to not include it. */
5036 s
= htab
->elf
.srelplt
;
5039 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5041 dyn
.d_un
.d_ptr
+= s
->size
;
5045 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5048 /* Fill in the first entry in the procedure linkage table. */
5049 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5053 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5054 abed
->plt
->plt0_entry_size
);
5055 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5056 abed
->plt0_pad_byte
,
5057 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5061 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5062 abed
->plt
->plt0_entry_size
);
5063 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5064 abed
->plt0_pad_byte
,
5065 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5066 bfd_put_32 (output_bfd
,
5067 (htab
->elf
.sgotplt
->output_section
->vma
5068 + htab
->elf
.sgotplt
->output_offset
5070 htab
->elf
.splt
->contents
5071 + abed
->plt
->plt0_got1_offset
);
5072 bfd_put_32 (output_bfd
,
5073 (htab
->elf
.sgotplt
->output_section
->vma
5074 + htab
->elf
.sgotplt
->output_offset
5076 htab
->elf
.splt
->contents
5077 + abed
->plt
->plt0_got2_offset
);
5079 if (abed
->is_vxworks
)
5081 Elf_Internal_Rela rel
;
5083 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5084 On IA32 we use REL relocations so the addend goes in
5085 the PLT directly. */
5086 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5087 + htab
->elf
.splt
->output_offset
5088 + abed
->plt
->plt0_got1_offset
);
5089 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5090 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5091 htab
->srelplt2
->contents
);
5092 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5093 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5094 + htab
->elf
.splt
->output_offset
5095 + abed
->plt
->plt0_got2_offset
);
5096 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5097 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5098 htab
->srelplt2
->contents
+
5099 sizeof (Elf32_External_Rel
));
5103 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5104 really seem like the right value. */
5105 elf_section_data (htab
->elf
.splt
->output_section
)
5106 ->this_hdr
.sh_entsize
= 4;
5108 /* Correct the .rel.plt.unloaded relocations. */
5109 if (abed
->is_vxworks
&& !info
->shared
)
5111 int num_plts
= (htab
->elf
.splt
->size
5112 / abed
->plt
->plt_entry_size
) - 1;
5115 p
= htab
->srelplt2
->contents
;
5117 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5119 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5121 for (; num_plts
; num_plts
--)
5123 Elf_Internal_Rela rel
;
5124 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5125 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5126 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5127 p
+= sizeof (Elf32_External_Rel
);
5129 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5130 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5131 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5132 p
+= sizeof (Elf32_External_Rel
);
5138 if (htab
->elf
.sgotplt
)
5140 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5142 (*_bfd_error_handler
)
5143 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5147 /* Fill in the first three entries in the global offset table. */
5148 if (htab
->elf
.sgotplt
->size
> 0)
5150 bfd_put_32 (output_bfd
,
5152 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5153 htab
->elf
.sgotplt
->contents
);
5154 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5155 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5158 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5161 /* Adjust .eh_frame for .plt section. */
5162 if (htab
->plt_eh_frame
!= NULL
5163 && htab
->plt_eh_frame
->contents
!= NULL
)
5165 if (htab
->elf
.splt
!= NULL
5166 && htab
->elf
.splt
->size
!= 0
5167 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5168 && htab
->elf
.splt
->output_section
!= NULL
5169 && htab
->plt_eh_frame
->output_section
!= NULL
)
5171 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5172 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5173 + htab
->plt_eh_frame
->output_offset
5174 + PLT_FDE_START_OFFSET
;
5175 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5176 htab
->plt_eh_frame
->contents
5177 + PLT_FDE_START_OFFSET
);
5179 if (htab
->plt_eh_frame
->sec_info_type
5180 == SEC_INFO_TYPE_EH_FRAME
)
5182 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5184 htab
->plt_eh_frame
->contents
))
5189 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5190 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5192 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5193 htab_traverse (htab
->loc_hash_table
,
5194 elf_i386_finish_local_dynamic_symbol
,
5200 /* Return an array of PLT entry symbol values. */
5203 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5206 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5209 bfd_vma
*plt_sym_val
;
5211 bfd_byte
*plt_contents
;
5212 const struct elf_i386_backend_data
*bed
5213 = get_elf_i386_backend_data (abfd
);
5214 Elf_Internal_Shdr
*hdr
;
5216 /* Get the .plt section contents. */
5217 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5218 if (plt_contents
== NULL
)
5220 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5221 plt_contents
, 0, plt
->size
))
5224 free (plt_contents
);
5228 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5229 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5232 hdr
= &elf_section_data (relplt
)->this_hdr
;
5233 count
= relplt
->size
/ hdr
->sh_entsize
;
5235 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5236 if (plt_sym_val
== NULL
)
5239 for (i
= 0; i
< count
; i
++)
5240 plt_sym_val
[i
] = -1;
5242 plt_offset
= bed
->plt
->plt_entry_size
;
5243 p
= relplt
->relocation
;
5244 for (i
= 0; i
< count
; i
++, p
++)
5248 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5249 if (p
->howto
== NULL
)
5252 if (p
->howto
->type
!= R_386_JUMP_SLOT
5253 && p
->howto
->type
!= R_386_IRELATIVE
)
5256 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5257 + bed
->plt
->plt_reloc_offset
));
5258 reloc_index
/= sizeof (Elf32_External_Rel
);
5259 if (reloc_index
>= count
)
5261 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5262 plt_offset
+= bed
->plt
->plt_entry_size
;
5264 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5266 if (plt_offset
>= plt
->size
)
5270 free (plt_contents
);
5275 /* Similar to _bfd_elf_get_synthetic_symtab. */
5278 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5285 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5286 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5287 dynsymcount
, dynsyms
, ret
,
5289 elf_i386_get_plt_sym_val
);
5292 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5295 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5297 if (h
->plt
.offset
!= (bfd_vma
) -1
5299 && !h
->pointer_equality_needed
)
5302 return _bfd_elf_hash_symbol (h
);
5305 /* Hook called by the linker routine which adds symbols from an object
5309 elf_i386_add_symbol_hook (bfd
* abfd
,
5310 struct bfd_link_info
* info
,
5311 Elf_Internal_Sym
* sym
,
5312 const char ** namep ATTRIBUTE_UNUSED
,
5313 flagword
* flagsp ATTRIBUTE_UNUSED
,
5314 asection
** secp ATTRIBUTE_UNUSED
,
5315 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5317 if ((ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5318 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
)
5319 && (abfd
->flags
& DYNAMIC
) == 0
5320 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5321 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5326 #define TARGET_LITTLE_SYM i386_elf32_vec
5327 #define TARGET_LITTLE_NAME "elf32-i386"
5328 #define ELF_ARCH bfd_arch_i386
5329 #define ELF_TARGET_ID I386_ELF_DATA
5330 #define ELF_MACHINE_CODE EM_386
5331 #define ELF_MAXPAGESIZE 0x1000
5333 #define elf_backend_can_gc_sections 1
5334 #define elf_backend_can_refcount 1
5335 #define elf_backend_want_got_plt 1
5336 #define elf_backend_plt_readonly 1
5337 #define elf_backend_want_plt_sym 0
5338 #define elf_backend_got_header_size 12
5339 #define elf_backend_plt_alignment 4
5340 #define elf_backend_extern_protected_data 1
5342 /* Support RELA for objdump of prelink objects. */
5343 #define elf_info_to_howto elf_i386_info_to_howto_rel
5344 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5346 #define bfd_elf32_mkobject elf_i386_mkobject
5348 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5349 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5350 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5351 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5352 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5354 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5355 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5356 #define elf_backend_check_relocs elf_i386_check_relocs
5357 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5358 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5359 #define elf_backend_fake_sections elf_i386_fake_sections
5360 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5361 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5362 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5363 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5364 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5365 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5366 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5367 #define elf_backend_relocate_section elf_i386_relocate_section
5368 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5369 #define elf_backend_always_size_sections elf_i386_always_size_sections
5370 #define elf_backend_omit_section_dynsym \
5371 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5372 #define elf_backend_hash_symbol elf_i386_hash_symbol
5373 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5375 #include "elf32-target.h"
5377 /* FreeBSD support. */
5379 #undef TARGET_LITTLE_SYM
5380 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5381 #undef TARGET_LITTLE_NAME
5382 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5384 #define ELF_OSABI ELFOSABI_FREEBSD
5386 /* The kernel recognizes executables as valid only if they carry a
5387 "FreeBSD" label in the ELF header. So we put this label on all
5388 executables and (for simplicity) also all other object files. */
5391 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5393 _bfd_elf_post_process_headers (abfd
, info
);
5395 #ifdef OLD_FREEBSD_ABI_LABEL
5397 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5398 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
5399 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5404 #undef elf_backend_post_process_headers
5405 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5407 #define elf32_bed elf32_i386_fbsd_bed
5409 #undef elf_backend_add_symbol_hook
5411 #include "elf32-target.h"
5415 #undef TARGET_LITTLE_SYM
5416 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
5417 #undef TARGET_LITTLE_NAME
5418 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5420 #undef elf_backend_post_process_headers
5422 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5423 objects won't be recognized. */
5427 #define elf32_bed elf32_i386_sol2_bed
5429 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5431 #undef elf_backend_static_tls_alignment
5432 #define elf_backend_static_tls_alignment 8
5434 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5436 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5438 #undef elf_backend_want_plt_sym
5439 #define elf_backend_want_plt_sym 1
5441 #include "elf32-target.h"
5443 /* Intel MCU support. */
5446 elf32_iamcu_elf_object_p (bfd
*abfd
)
5448 /* Set the right machine number for an IAMCU elf32 file. */
5449 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
5453 #undef TARGET_LITTLE_SYM
5454 #define TARGET_LITTLE_SYM iamcu_elf32_vec
5455 #undef TARGET_LITTLE_NAME
5456 #define TARGET_LITTLE_NAME "elf32-iamcu"
5458 #define ELF_ARCH bfd_arch_iamcu
5460 #undef ELF_MACHINE_CODE
5461 #define ELF_MACHINE_CODE EM_IAMCU
5466 #define elf32_bed elf32_iamcu_bed
5468 #undef elf_backend_object_p
5469 #define elf_backend_object_p elf32_iamcu_elf_object_p
5471 #undef elf_backend_static_tls_alignment
5473 #undef elf_backend_want_plt_sym
5474 #define elf_backend_want_plt_sym 0
5476 #include "elf32-target.h"
5478 /* Restore defaults. */
5480 #define ELF_ARCH bfd_arch_i386
5481 #undef ELF_MACHINE_CODE
5482 #define ELF_MACHINE_CODE EM_386
5484 /* Native Client support. */
5486 #undef TARGET_LITTLE_SYM
5487 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
5488 #undef TARGET_LITTLE_NAME
5489 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5491 #define elf32_bed elf32_i386_nacl_bed
5493 #undef ELF_MAXPAGESIZE
5494 #define ELF_MAXPAGESIZE 0x10000
5496 /* Restore defaults. */
5498 #undef elf_backend_want_plt_sym
5499 #define elf_backend_want_plt_sym 0
5500 #undef elf_backend_post_process_headers
5501 #undef elf_backend_static_tls_alignment
5503 /* NaCl uses substantially different PLT entries for the same effects. */
5505 #undef elf_backend_plt_alignment
5506 #define elf_backend_plt_alignment 5
5507 #define NACL_PLT_ENTRY_SIZE 64
5508 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5510 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5512 0xff, 0x35, /* pushl contents of address */
5513 0, 0, 0, 0, /* replaced with address of .got + 4. */
5514 0x8b, 0x0d, /* movl contents of address, %ecx */
5515 0, 0, 0, 0, /* replaced with address of .got + 8. */
5516 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5517 0xff, 0xe1 /* jmp *%ecx */
5520 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5522 0x8b, 0x0d, /* movl contents of address, %ecx */
5523 0, 0, 0, 0, /* replaced with GOT slot address. */
5524 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5525 0xff, 0xe1, /* jmp *%ecx */
5527 /* Pad to the next 32-byte boundary with nop instructions. */
5529 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5530 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5532 /* Lazy GOT entries point here (32-byte aligned). */
5533 0x68, /* pushl immediate */
5534 0, 0, 0, 0, /* replaced with reloc offset. */
5535 0xe9, /* jmp relative */
5536 0, 0, 0, 0, /* replaced with offset to .plt. */
5538 /* Pad to the next 32-byte boundary with nop instructions. */
5539 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5540 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5544 static const bfd_byte
5545 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5547 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5548 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5549 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5550 0xff, 0xe1, /* jmp *%ecx */
5552 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5553 so pad to that size with nop instructions. */
5554 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5557 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5559 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5560 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5561 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5562 0xff, 0xe1, /* jmp *%ecx */
5564 /* Pad to the next 32-byte boundary with nop instructions. */
5566 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5567 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5569 /* Lazy GOT entries point here (32-byte aligned). */
5570 0x68, /* pushl immediate */
5571 0, 0, 0, 0, /* replaced with offset into relocation table. */
5572 0xe9, /* jmp relative */
5573 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5575 /* Pad to the next 32-byte boundary with nop instructions. */
5576 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5577 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5581 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5583 #if (PLT_CIE_LENGTH != 20 \
5584 || PLT_FDE_LENGTH != 36 \
5585 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5586 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5587 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5589 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5590 0, 0, 0, 0, /* CIE ID */
5591 1, /* CIE version */
5592 'z', 'R', 0, /* Augmentation string */
5593 1, /* Code alignment factor */
5594 0x7c, /* Data alignment factor: -4 */
5595 8, /* Return address column */
5596 1, /* Augmentation size */
5597 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5598 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5599 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5600 DW_CFA_nop
, DW_CFA_nop
,
5602 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5603 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5604 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5605 0, 0, 0, 0, /* .plt size goes here */
5606 0, /* Augmentation size */
5607 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5608 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5609 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5610 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5611 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5612 13, /* Block length */
5613 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5614 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5615 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5616 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5617 DW_CFA_nop
, DW_CFA_nop
5620 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5622 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5623 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5624 2, /* plt0_got1_offset */
5625 8, /* plt0_got2_offset */
5626 elf_i386_nacl_plt_entry
, /* plt_entry */
5627 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5628 2, /* plt_got_offset */
5629 33, /* plt_reloc_offset */
5630 38, /* plt_plt_offset */
5631 32, /* plt_lazy_offset */
5632 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5633 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5634 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5635 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5638 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5640 &elf_i386_nacl_plt
, /* plt */
5641 0x90, /* plt0_pad_byte: nop insn */
5646 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5648 /* Set the right machine number for a NaCl i386 ELF32 file. */
5649 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5653 #undef elf_backend_arch_data
5654 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5656 #undef elf_backend_object_p
5657 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5658 #undef elf_backend_modify_segment_map
5659 #define elf_backend_modify_segment_map nacl_modify_segment_map
5660 #undef elf_backend_modify_program_headers
5661 #define elf_backend_modify_program_headers nacl_modify_program_headers
5662 #undef elf_backend_final_write_processing
5663 #define elf_backend_final_write_processing nacl_final_write_processing
5665 #include "elf32-target.h"
5667 /* Restore defaults. */
5668 #undef elf_backend_object_p
5669 #undef elf_backend_modify_segment_map
5670 #undef elf_backend_modify_program_headers
5671 #undef elf_backend_final_write_processing
5673 /* VxWorks support. */
5675 #undef TARGET_LITTLE_SYM
5676 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
5677 #undef TARGET_LITTLE_NAME
5678 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5680 #undef elf_backend_plt_alignment
5681 #define elf_backend_plt_alignment 4
5683 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5685 &elf_i386_plt
, /* plt */
5686 0x90, /* plt0_pad_byte */
5690 #undef elf_backend_arch_data
5691 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5693 #undef elf_backend_relocs_compatible
5694 #undef elf_backend_add_symbol_hook
5695 #define elf_backend_add_symbol_hook \
5696 elf_vxworks_add_symbol_hook
5697 #undef elf_backend_link_output_symbol_hook
5698 #define elf_backend_link_output_symbol_hook \
5699 elf_vxworks_link_output_symbol_hook
5700 #undef elf_backend_emit_relocs
5701 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5702 #undef elf_backend_final_write_processing
5703 #define elf_backend_final_write_processing \
5704 elf_vxworks_final_write_processing
5705 #undef elf_backend_static_tls_alignment
5707 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5709 #undef elf_backend_want_plt_sym
5710 #define elf_backend_want_plt_sym 1
5713 #define elf32_bed elf32_i386_vxworks_bed
5715 #include "elf32-target.h"