1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2016 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"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table
[]=
41 HOWTO(R_386_NONE
, 0, 3, 0, FALSE
, 0, complain_overflow_dont
,
42 bfd_elf_generic_reloc
, "R_386_NONE",
43 TRUE
, 0x00000000, 0x00000000, FALSE
),
44 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
45 bfd_elf_generic_reloc
, "R_386_32",
46 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
47 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
48 bfd_elf_generic_reloc
, "R_386_PC32",
49 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
50 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
51 bfd_elf_generic_reloc
, "R_386_GOT32",
52 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
53 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
54 bfd_elf_generic_reloc
, "R_386_PLT32",
55 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
56 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
57 bfd_elf_generic_reloc
, "R_386_COPY",
58 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
59 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
61 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
62 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
64 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
65 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_386_RELATIVE",
67 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
68 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
69 bfd_elf_generic_reloc
, "R_386_GOTOFF",
70 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
71 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_386_GOTPC",
73 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
85 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
86 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_386_TLS_IE",
88 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
91 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
92 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_386_TLS_LE",
94 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
95 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_386_TLS_GD",
97 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
98 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
100 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
101 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_386_16",
103 TRUE
, 0xffff, 0xffff, FALSE
),
104 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_386_PC16",
106 TRUE
, 0xffff, 0xffff, TRUE
),
107 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_386_8",
109 TRUE
, 0xff, 0xff, FALSE
),
110 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
111 bfd_elf_generic_reloc
, "R_386_PC8",
112 TRUE
, 0xff, 0xff, TRUE
),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
119 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
120 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
122 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
123 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
125 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
126 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
128 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
129 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
131 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
132 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
133 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
134 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
135 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
136 bfd_elf_generic_reloc
, "R_386_SIZE32",
137 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
138 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
140 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
141 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
142 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
145 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
146 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
147 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
148 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
149 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
150 HOWTO(R_386_GOT32X
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
151 bfd_elf_generic_reloc
, "R_386_GOT32X",
152 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT
, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE
, /* pc_relative */
165 complain_overflow_dont
, /* complain_on_overflow */
166 NULL
, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE
, /* partial_inplace */
171 FALSE
), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY
, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE
, /* pc_relative */
180 complain_overflow_dont
, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE
, /* partial_inplace */
186 FALSE
) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type
*
200 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
201 bfd_reloc_code_real_type code
)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table
[R_386_NONE
];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table
[R_386_32
];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table
[R_386_32
];
217 case BFD_RELOC_32_PCREL
:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table
[R_386_PC32
];
221 case BFD_RELOC_386_GOT32
:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table
[R_386_GOT32
];
225 case BFD_RELOC_386_PLT32
:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table
[R_386_PLT32
];
229 case BFD_RELOC_386_COPY
:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table
[R_386_COPY
];
233 case BFD_RELOC_386_GLOB_DAT
:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table
[R_386_GLOB_DAT
];
237 case BFD_RELOC_386_JUMP_SLOT
:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table
[R_386_JUMP_SLOT
];
241 case BFD_RELOC_386_RELATIVE
:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table
[R_386_RELATIVE
];
245 case BFD_RELOC_386_GOTOFF
:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table
[R_386_GOTOFF
];
249 case BFD_RELOC_386_GOTPC
:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table
[R_386_GOTPC
];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF
:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
258 case BFD_RELOC_386_TLS_IE
:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
262 case BFD_RELOC_386_TLS_GOTIE
:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
266 case BFD_RELOC_386_TLS_LE
:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
270 case BFD_RELOC_386_TLS_GD
:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
274 case BFD_RELOC_386_TLS_LDM
:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
282 case BFD_RELOC_16_PCREL
:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
290 case BFD_RELOC_8_PCREL
:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32
:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
299 case BFD_RELOC_386_TLS_IE_32
:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
303 case BFD_RELOC_386_TLS_LE_32
:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
307 case BFD_RELOC_386_TLS_DTPMOD32
:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
311 case BFD_RELOC_386_TLS_DTPOFF32
:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
315 case BFD_RELOC_386_TLS_TPOFF32
:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
319 case BFD_RELOC_SIZE32
:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
323 case BFD_RELOC_386_TLS_GOTDESC
:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
327 case BFD_RELOC_386_TLS_DESC_CALL
:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
331 case BFD_RELOC_386_TLS_DESC
:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
335 case BFD_RELOC_386_IRELATIVE
:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
339 case BFD_RELOC_386_GOT32X
:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table
[R_386_GOT32X
- R_386_tls_offset
];
343 case BFD_RELOC_VTABLE_INHERIT
:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
347 case BFD_RELOC_VTABLE_ENTRY
:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
359 static reloc_howto_type
*
360 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
365 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
366 if (elf_howto_table
[i
].name
!= NULL
367 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
368 return &elf_howto_table
[i
];
373 static reloc_howto_type
*
374 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
378 if ((indx
= r_type
) >= R_386_standard
379 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
380 >= R_386_ext
- R_386_standard
)
381 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
382 >= R_386_ext2
- R_386_ext
)
383 && ((indx
= r_type
- R_386_vt_offset
) - R_386_ext2
384 >= R_386_vt
- R_386_ext2
))
386 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
390 /* PR 17512: file: 0f67f69d. */
391 if (elf_howto_table
[indx
].type
!= r_type
)
393 return &elf_howto_table
[indx
];
397 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
399 Elf_Internal_Rela
*dst
)
401 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
402 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
405 /* Return whether a symbol name implies a local label. The UnixWare
406 2.1 cc generates temporary symbols that start with .X, so we
407 recognize them here. FIXME: do other SVR4 compilers also use .X?.
408 If so, we should move the .X recognition into
409 _bfd_elf_is_local_label_name. */
412 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
414 if (name
[0] == '.' && name
[1] == 'X')
417 return _bfd_elf_is_local_label_name (abfd
, name
);
420 /* Support for core dump NOTE sections. */
423 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
428 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
430 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
436 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
439 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
443 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
447 switch (note
->descsz
)
452 case 144: /* Linux/i386 */
454 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
457 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
467 /* Make a ".reg/999" section. */
468 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
469 size
, note
->descpos
+ offset
);
473 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
475 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
477 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
482 elf_tdata (abfd
)->core
->program
483 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
484 elf_tdata (abfd
)->core
->command
485 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
489 switch (note
->descsz
)
494 case 124: /* Linux/i386 elf_prpsinfo. */
495 elf_tdata (abfd
)->core
->pid
496 = bfd_get_32 (abfd
, note
->descdata
+ 12);
497 elf_tdata (abfd
)->core
->program
498 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
499 elf_tdata (abfd
)->core
->command
500 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
504 /* Note that for some reason, a spurious space is tacked
505 onto the end of the args in some (at least one anyway)
506 implementations, so strip it off if it exists. */
508 char *command
= elf_tdata (abfd
)->core
->command
;
509 int n
= strlen (command
);
511 if (0 < n
&& command
[n
- 1] == ' ')
512 command
[n
- 1] = '\0';
518 /* Functions for the i386 ELF linker.
520 In order to gain some understanding of code in this file without
521 knowing all the intricate details of the linker, note the
524 Functions named elf_i386_* are called by external routines, other
525 functions are only called locally. elf_i386_* functions appear
526 in this file more or less in the order in which they are called
527 from external routines. eg. elf_i386_check_relocs is called
528 early in the link process, elf_i386_finish_dynamic_sections is
529 one of the last functions. */
532 /* The name of the dynamic interpreter. This is put in the .interp
535 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
537 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
541 #define ELIMINATE_COPY_RELOCS 1
543 /* The size in bytes of an entry in the procedure linkage table. */
545 #define PLT_ENTRY_SIZE 16
547 /* The first entry in an absolute procedure linkage table looks like
548 this. See the SVR4 ABI i386 supplement to see how this works.
549 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
551 static const bfd_byte elf_i386_plt0_entry
[12] =
553 0xff, 0x35, /* pushl contents of address */
554 0, 0, 0, 0, /* replaced with address of .got + 4. */
555 0xff, 0x25, /* jmp indirect */
556 0, 0, 0, 0 /* replaced with address of .got + 8. */
559 /* Subsequent entries in an absolute procedure linkage table look like
562 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
564 0xff, 0x25, /* jmp indirect */
565 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
566 0x68, /* pushl immediate */
567 0, 0, 0, 0, /* replaced with offset into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt. */
572 /* The first entry in a PIC procedure linkage table look like this.
573 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
575 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
577 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
578 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
581 /* Subsequent entries in a PIC procedure linkage table look like this. */
583 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
593 /* Entries in the GOT procedure linkage table look like this. */
595 static const bfd_byte elf_i386_got_plt_entry
[8] =
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
602 /* Entries in the PIC GOT procedure linkage table look like this. */
604 static const bfd_byte elf_i386_pic_got_plt_entry
[8] =
606 0xff, 0xa3, /* jmp *offset(%ebx) */
607 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
608 0x66, 0x90 /* xchg %ax,%ax */
611 /* .eh_frame covering the .plt section. */
613 static const bfd_byte elf_i386_eh_frame_plt
[] =
615 #define PLT_CIE_LENGTH 20
616 #define PLT_FDE_LENGTH 36
617 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
618 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
619 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
620 0, 0, 0, 0, /* CIE ID */
622 'z', 'R', 0, /* Augmentation string */
623 1, /* Code alignment factor */
624 0x7c, /* Data alignment factor */
625 8, /* Return address column */
626 1, /* Augmentation size */
627 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
628 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
629 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
630 DW_CFA_nop
, DW_CFA_nop
,
632 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
633 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
634 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
635 0, 0, 0, 0, /* .plt size goes here */
636 0, /* Augmentation size */
637 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
638 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
639 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
640 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
641 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
642 11, /* Block length */
643 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
644 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
645 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
646 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
647 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
650 struct elf_i386_plt_layout
652 /* The first entry in an absolute procedure linkage table looks like this. */
653 const bfd_byte
*plt0_entry
;
654 unsigned int plt0_entry_size
;
656 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
657 unsigned int plt0_got1_offset
;
658 unsigned int plt0_got2_offset
;
660 /* Later entries in an absolute procedure linkage table look like this. */
661 const bfd_byte
*plt_entry
;
662 unsigned int plt_entry_size
;
664 /* Offsets into plt_entry that are to be replaced with... */
665 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
666 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
667 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
669 /* Offset into plt_entry where the initial value of the GOT entry points. */
670 unsigned int plt_lazy_offset
;
672 /* The first entry in a PIC procedure linkage table looks like this. */
673 const bfd_byte
*pic_plt0_entry
;
675 /* Subsequent entries in a PIC procedure linkage table look like this. */
676 const bfd_byte
*pic_plt_entry
;
678 /* .eh_frame covering the .plt section. */
679 const bfd_byte
*eh_frame_plt
;
680 unsigned int eh_frame_plt_size
;
683 #define GET_PLT_ENTRY_SIZE(abfd) \
684 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
686 /* These are the standard parameters. */
687 static const struct elf_i386_plt_layout elf_i386_plt
=
689 elf_i386_plt0_entry
, /* plt0_entry */
690 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
691 2, /* plt0_got1_offset */
692 8, /* plt0_got2_offset */
693 elf_i386_plt_entry
, /* plt_entry */
694 PLT_ENTRY_SIZE
, /* plt_entry_size */
695 2, /* plt_got_offset */
696 7, /* plt_reloc_offset */
697 12, /* plt_plt_offset */
698 6, /* plt_lazy_offset */
699 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
700 elf_i386_pic_plt_entry
, /* pic_plt_entry */
701 elf_i386_eh_frame_plt
, /* eh_frame_plt */
702 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
706 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
707 for the PLTResolve stub and then for each PLT entry. */
708 #define PLTRESOLVE_RELOCS_SHLIB 0
709 #define PLTRESOLVE_RELOCS 2
710 #define PLT_NON_JUMP_SLOT_RELOCS 2
712 /* Architecture-specific backend data for i386. */
714 struct elf_i386_backend_data
716 /* Parameters describing PLT generation. */
717 const struct elf_i386_plt_layout
*plt
;
719 /* Value used to fill the unused bytes of the first PLT entry. */
720 bfd_byte plt0_pad_byte
;
722 /* True if the target system is VxWorks. */
726 #define get_elf_i386_backend_data(abfd) \
727 ((const struct elf_i386_backend_data *) \
728 get_elf_backend_data (abfd)->arch_data)
730 /* These are the standard parameters. */
731 static const struct elf_i386_backend_data elf_i386_arch_bed
=
733 &elf_i386_plt
, /* plt */
734 0, /* plt0_pad_byte */
738 #define elf_backend_arch_data &elf_i386_arch_bed
740 /* Is a undefined weak symbol which is resolved to 0. Reference to an
741 undefined weak symbol is resolved to 0 when building executable if
743 1. Has non-GOT/non-PLT relocations in text section. Or
744 2. Has no GOT/PLT relocation.
746 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \
747 ((EH)->elf.root.type == bfd_link_hash_undefweak \
748 && bfd_link_executable (INFO) \
749 && (elf_i386_hash_table (INFO)->interp == NULL \
750 || !(EH)->has_got_reloc \
751 || (EH)->has_non_got_reloc \
752 || !(INFO)->dynamic_undefined_weak))
754 /* i386 ELF linker hash entry. */
756 struct elf_i386_link_hash_entry
758 struct elf_link_hash_entry elf
;
760 /* Track dynamic relocs copied for this symbol. */
761 struct elf_dyn_relocs
*dyn_relocs
;
763 #define GOT_UNKNOWN 0
767 #define GOT_TLS_IE_POS 5
768 #define GOT_TLS_IE_NEG 6
769 #define GOT_TLS_IE_BOTH 7
770 #define GOT_TLS_GDESC 8
771 #define GOT_TLS_GD_BOTH_P(type) \
772 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
773 #define GOT_TLS_GD_P(type) \
774 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
775 #define GOT_TLS_GDESC_P(type) \
776 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
777 #define GOT_TLS_GD_ANY_P(type) \
778 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
779 unsigned char tls_type
;
781 /* Symbol is referenced by R_386_GOTOFF relocation. */
782 unsigned int gotoff_ref
: 1;
784 /* Symbol has GOT or PLT relocations. */
785 unsigned int has_got_reloc
: 1;
787 /* Symbol has non-GOT/non-PLT relocations in text sections. */
788 unsigned int has_non_got_reloc
: 1;
790 /* Reference count of C/C++ function pointer relocations in read-write
791 section which can be resolved at run-time. */
792 bfd_signed_vma func_pointer_refcount
;
794 /* Information about the GOT PLT entry. Filled when there are both
795 GOT and PLT relocations against the same function. */
796 union gotplt_union plt_got
;
798 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
799 starting at the end of the jump table. */
803 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
805 struct elf_i386_obj_tdata
807 struct elf_obj_tdata root
;
809 /* tls_type for each local got entry. */
810 char *local_got_tls_type
;
812 /* GOTPLT entries for TLS descriptors. */
813 bfd_vma
*local_tlsdesc_gotent
;
816 #define elf_i386_tdata(abfd) \
817 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
819 #define elf_i386_local_got_tls_type(abfd) \
820 (elf_i386_tdata (abfd)->local_got_tls_type)
822 #define elf_i386_local_tlsdesc_gotent(abfd) \
823 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
825 #define is_i386_elf(bfd) \
826 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
827 && elf_tdata (bfd) != NULL \
828 && elf_object_id (bfd) == I386_ELF_DATA)
831 elf_i386_mkobject (bfd
*abfd
)
833 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
837 /* i386 ELF linker hash table. */
839 struct elf_i386_link_hash_table
841 struct elf_link_hash_table elf
;
843 /* Short-cuts to get to dynamic linker sections. */
847 asection
*plt_eh_frame
;
852 bfd_signed_vma refcount
;
856 /* The amount of space used by the reserved portion of the sgotplt
857 section, plus whatever space is used by the jump slots. */
858 bfd_vma sgotplt_jump_table_size
;
860 /* Small local sym cache. */
861 struct sym_cache sym_cache
;
863 /* _TLS_MODULE_BASE_ symbol. */
864 struct bfd_link_hash_entry
*tls_module_base
;
866 /* Used by local STT_GNU_IFUNC symbols. */
867 htab_t loc_hash_table
;
868 void * loc_hash_memory
;
870 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
873 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
874 bfd_vma next_tls_desc_index
;
876 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
877 bfd_vma next_jump_slot_index
;
879 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
880 bfd_vma next_irelative_index
;
882 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
883 to read-only sections. */
884 bfd_boolean readonly_dynrelocs_against_ifunc
;
887 /* Get the i386 ELF linker hash table from a link_info structure. */
889 #define elf_i386_hash_table(p) \
890 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
891 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
893 #define elf_i386_compute_jump_table_size(htab) \
894 ((htab)->elf.srelplt->reloc_count * 4)
896 /* Create an entry in an i386 ELF linker hash table. */
898 static struct bfd_hash_entry
*
899 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
900 struct bfd_hash_table
*table
,
903 /* Allocate the structure if it has not already been allocated by a
907 entry
= (struct bfd_hash_entry
*)
908 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
913 /* Call the allocation method of the superclass. */
914 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
917 struct elf_i386_link_hash_entry
*eh
;
919 eh
= (struct elf_i386_link_hash_entry
*) entry
;
920 eh
->dyn_relocs
= NULL
;
921 eh
->tls_type
= GOT_UNKNOWN
;
923 eh
->has_got_reloc
= 0;
924 eh
->has_non_got_reloc
= 0;
925 eh
->func_pointer_refcount
= 0;
926 eh
->plt_got
.offset
= (bfd_vma
) -1;
927 eh
->tlsdesc_got
= (bfd_vma
) -1;
933 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
934 for local symbol so that we can handle local STT_GNU_IFUNC symbols
935 as global symbol. We reuse indx and dynstr_index for local symbol
936 hash since they aren't used by global symbols in this backend. */
939 elf_i386_local_htab_hash (const void *ptr
)
941 struct elf_link_hash_entry
*h
942 = (struct elf_link_hash_entry
*) ptr
;
943 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
946 /* Compare local hash entries. */
949 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
951 struct elf_link_hash_entry
*h1
952 = (struct elf_link_hash_entry
*) ptr1
;
953 struct elf_link_hash_entry
*h2
954 = (struct elf_link_hash_entry
*) ptr2
;
956 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
959 /* Find and/or create a hash entry for local symbol. */
961 static struct elf_link_hash_entry
*
962 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
963 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
966 struct elf_i386_link_hash_entry e
, *ret
;
967 asection
*sec
= abfd
->sections
;
968 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
969 ELF32_R_SYM (rel
->r_info
));
972 e
.elf
.indx
= sec
->id
;
973 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
974 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
975 create
? INSERT
: NO_INSERT
);
982 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
986 ret
= (struct elf_i386_link_hash_entry
*)
987 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
988 sizeof (struct elf_i386_link_hash_entry
));
991 memset (ret
, 0, sizeof (*ret
));
992 ret
->elf
.indx
= sec
->id
;
993 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
994 ret
->elf
.dynindx
= -1;
995 ret
->func_pointer_refcount
= 0;
996 ret
->plt_got
.offset
= (bfd_vma
) -1;
1002 /* Destroy an i386 ELF linker hash table. */
1005 elf_i386_link_hash_table_free (bfd
*obfd
)
1007 struct elf_i386_link_hash_table
*htab
1008 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1010 if (htab
->loc_hash_table
)
1011 htab_delete (htab
->loc_hash_table
);
1012 if (htab
->loc_hash_memory
)
1013 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1014 _bfd_elf_link_hash_table_free (obfd
);
1017 /* Create an i386 ELF linker hash table. */
1019 static struct bfd_link_hash_table
*
1020 elf_i386_link_hash_table_create (bfd
*abfd
)
1022 struct elf_i386_link_hash_table
*ret
;
1023 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1025 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1029 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1030 elf_i386_link_hash_newfunc
,
1031 sizeof (struct elf_i386_link_hash_entry
),
1038 ret
->loc_hash_table
= htab_try_create (1024,
1039 elf_i386_local_htab_hash
,
1040 elf_i386_local_htab_eq
,
1042 ret
->loc_hash_memory
= objalloc_create ();
1043 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1045 elf_i386_link_hash_table_free (abfd
);
1048 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1050 return &ret
->elf
.root
;
1053 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1054 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1058 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1060 struct elf_i386_link_hash_table
*htab
;
1062 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1065 htab
= elf_i386_hash_table (info
);
1069 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1073 if (bfd_link_executable (info
))
1075 /* Always allow copy relocs for building executables. */
1076 asection
*s
= bfd_get_linker_section (dynobj
, ".rel.bss");
1079 const struct elf_backend_data
*bed
= get_elf_backend_data (dynobj
);
1080 s
= bfd_make_section_anyway_with_flags (dynobj
,
1082 (bed
->dynamic_sec_flags
1085 || ! bfd_set_section_alignment (dynobj
, s
,
1086 bed
->s
->log_file_align
))
1092 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1093 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1097 if (!info
->no_ld_generated_unwind_info
1098 && htab
->plt_eh_frame
== NULL
1099 && htab
->elf
.splt
!= NULL
)
1101 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1102 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1103 | SEC_LINKER_CREATED
);
1105 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1106 if (htab
->plt_eh_frame
== NULL
1107 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1114 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1117 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1118 struct elf_link_hash_entry
*dir
,
1119 struct elf_link_hash_entry
*ind
)
1121 struct elf_i386_link_hash_entry
*edir
, *eind
;
1123 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1124 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1126 if (eind
->dyn_relocs
!= NULL
)
1128 if (edir
->dyn_relocs
!= NULL
)
1130 struct elf_dyn_relocs
**pp
;
1131 struct elf_dyn_relocs
*p
;
1133 /* Add reloc counts against the indirect sym to the direct sym
1134 list. Merge any entries against the same section. */
1135 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1137 struct elf_dyn_relocs
*q
;
1139 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1140 if (q
->sec
== p
->sec
)
1142 q
->pc_count
+= p
->pc_count
;
1143 q
->count
+= p
->count
;
1150 *pp
= edir
->dyn_relocs
;
1153 edir
->dyn_relocs
= eind
->dyn_relocs
;
1154 eind
->dyn_relocs
= NULL
;
1157 if (ind
->root
.type
== bfd_link_hash_indirect
1158 && dir
->got
.refcount
<= 0)
1160 edir
->tls_type
= eind
->tls_type
;
1161 eind
->tls_type
= GOT_UNKNOWN
;
1164 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1165 generate a R_386_COPY reloc. */
1166 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1168 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1169 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1171 if (ELIMINATE_COPY_RELOCS
1172 && ind
->root
.type
!= bfd_link_hash_indirect
1173 && dir
->dynamic_adjusted
)
1175 /* If called to transfer flags for a weakdef during processing
1176 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1177 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1178 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1179 dir
->ref_regular
|= ind
->ref_regular
;
1180 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1181 dir
->needs_plt
|= ind
->needs_plt
;
1182 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1186 if (eind
->func_pointer_refcount
> 0)
1188 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1189 eind
->func_pointer_refcount
= 0;
1192 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1196 /* Return TRUE if the TLS access code sequence support transition
1200 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1202 Elf_Internal_Shdr
*symtab_hdr
,
1203 struct elf_link_hash_entry
**sym_hashes
,
1204 unsigned int r_type
,
1205 const Elf_Internal_Rela
*rel
,
1206 const Elf_Internal_Rela
*relend
)
1208 unsigned int val
, type
;
1209 unsigned long r_symndx
;
1210 struct elf_link_hash_entry
*h
;
1213 /* Get the section contents. */
1214 if (contents
== NULL
)
1216 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1217 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1220 /* FIXME: How to better handle error condition? */
1221 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1224 /* Cache the section contents for elf_link_input_bfd. */
1225 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1229 offset
= rel
->r_offset
;
1234 if (offset
< 2 || (rel
+ 1) >= relend
)
1237 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1238 if (r_type
== R_386_TLS_GD
)
1240 /* Check transition from GD access model. Only
1241 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1242 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1243 can transit to different access model. */
1244 if ((offset
+ 10) > sec
->size
||
1245 (type
!= 0x8d && type
!= 0x04))
1248 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1251 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1255 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1258 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1263 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1264 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1267 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1273 /* Check transition from LD access model. Only
1274 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1275 can transit to different access model. */
1276 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1279 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1280 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1284 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1287 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1288 if (r_symndx
< symtab_hdr
->sh_info
)
1291 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1292 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1293 may be versioned. */
1295 && h
->root
.root
.string
!= NULL
1296 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1297 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1298 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1302 /* Check transition from IE access model:
1303 movl foo@indntpoff(%rip), %eax
1304 movl foo@indntpoff(%rip), %reg
1305 addl foo@indntpoff(%rip), %reg
1308 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1311 /* Check "movl foo@tpoff(%rip), %eax" first. */
1312 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1319 /* Check movl|addl foo@tpoff(%rip), %reg. */
1320 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1321 return ((type
== 0x8b || type
== 0x03)
1322 && (val
& 0xc7) == 0x05);
1324 case R_386_TLS_GOTIE
:
1325 case R_386_TLS_IE_32
:
1326 /* Check transition from {IE_32,GOTIE} access model:
1327 subl foo@{tpoff,gontoff}(%reg1), %reg2
1328 movl foo@{tpoff,gontoff}(%reg1), %reg2
1329 addl foo@{tpoff,gontoff}(%reg1), %reg2
1332 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1335 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1336 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1339 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1340 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1342 case R_386_TLS_GOTDESC
:
1343 /* Check transition from GDesc access model:
1344 leal x@tlsdesc(%ebx), %eax
1346 Make sure it's a leal adding ebx to a 32-bit offset
1347 into any register, although it's probably almost always
1350 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1353 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1356 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1357 return (val
& 0xc7) == 0x83;
1359 case R_386_TLS_DESC_CALL
:
1360 /* Check transition from GDesc access model:
1361 call *x@tlsdesc(%rax)
1363 if (offset
+ 2 <= sec
->size
)
1365 /* Make sure that it's a call *x@tlsdesc(%rax). */
1366 static const unsigned char call
[] = { 0xff, 0x10 };
1367 return memcmp (contents
+ offset
, call
, 2) == 0;
1377 /* Return TRUE if the TLS access transition is OK or no transition
1378 will be performed. Update R_TYPE if there is a transition. */
1381 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1382 asection
*sec
, bfd_byte
*contents
,
1383 Elf_Internal_Shdr
*symtab_hdr
,
1384 struct elf_link_hash_entry
**sym_hashes
,
1385 unsigned int *r_type
, int tls_type
,
1386 const Elf_Internal_Rela
*rel
,
1387 const Elf_Internal_Rela
*relend
,
1388 struct elf_link_hash_entry
*h
,
1389 unsigned long r_symndx
)
1391 unsigned int from_type
= *r_type
;
1392 unsigned int to_type
= from_type
;
1393 bfd_boolean check
= TRUE
;
1395 /* Skip TLS transition for functions. */
1397 && (h
->type
== STT_FUNC
1398 || h
->type
== STT_GNU_IFUNC
))
1404 case R_386_TLS_GOTDESC
:
1405 case R_386_TLS_DESC_CALL
:
1406 case R_386_TLS_IE_32
:
1408 case R_386_TLS_GOTIE
:
1409 if (bfd_link_executable (info
))
1412 to_type
= R_386_TLS_LE_32
;
1413 else if (from_type
!= R_386_TLS_IE
1414 && from_type
!= R_386_TLS_GOTIE
)
1415 to_type
= R_386_TLS_IE_32
;
1418 /* When we are called from elf_i386_relocate_section, CONTENTS
1419 isn't NULL and there may be additional transitions based on
1421 if (contents
!= NULL
)
1423 unsigned int new_to_type
= to_type
;
1425 if (bfd_link_executable (info
)
1428 && (tls_type
& GOT_TLS_IE
))
1429 new_to_type
= R_386_TLS_LE_32
;
1431 if (to_type
== R_386_TLS_GD
1432 || to_type
== R_386_TLS_GOTDESC
1433 || to_type
== R_386_TLS_DESC_CALL
)
1435 if (tls_type
== GOT_TLS_IE_POS
)
1436 new_to_type
= R_386_TLS_GOTIE
;
1437 else if (tls_type
& GOT_TLS_IE
)
1438 new_to_type
= R_386_TLS_IE_32
;
1441 /* We checked the transition before when we were called from
1442 elf_i386_check_relocs. We only want to check the new
1443 transition which hasn't been checked before. */
1444 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1445 to_type
= new_to_type
;
1451 if (bfd_link_executable (info
))
1452 to_type
= R_386_TLS_LE_32
;
1459 /* Return TRUE if there is no transition. */
1460 if (from_type
== to_type
)
1463 /* Check if the transition can be performed. */
1465 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1466 symtab_hdr
, sym_hashes
,
1467 from_type
, rel
, relend
))
1469 reloc_howto_type
*from
, *to
;
1472 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1473 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1476 name
= h
->root
.root
.string
;
1479 struct elf_i386_link_hash_table
*htab
;
1481 htab
= elf_i386_hash_table (info
);
1486 Elf_Internal_Sym
*isym
;
1488 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1490 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1494 (*_bfd_error_handler
)
1495 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1496 "in section `%A' failed"),
1497 abfd
, sec
, from
->name
, to
->name
, name
,
1498 (unsigned long) rel
->r_offset
);
1499 bfd_set_error (bfd_error_bad_value
);
1507 /* Rename some of the generic section flags to better document how they
1509 #define need_convert_load sec_flg0
1511 /* Look through the relocs for a section during the first phase, and
1512 calculate needed space in the global offset table, procedure linkage
1513 table, and dynamic reloc sections. */
1516 elf_i386_check_relocs (bfd
*abfd
,
1517 struct bfd_link_info
*info
,
1519 const Elf_Internal_Rela
*relocs
)
1521 struct elf_i386_link_hash_table
*htab
;
1522 Elf_Internal_Shdr
*symtab_hdr
;
1523 struct elf_link_hash_entry
**sym_hashes
;
1524 const Elf_Internal_Rela
*rel
;
1525 const Elf_Internal_Rela
*rel_end
;
1527 bfd_boolean use_plt_got
;
1529 if (bfd_link_relocatable (info
))
1532 BFD_ASSERT (is_i386_elf (abfd
));
1534 htab
= elf_i386_hash_table (info
);
1538 use_plt_got
= (!get_elf_i386_backend_data (abfd
)->is_vxworks
1539 && (get_elf_i386_backend_data (abfd
)
1540 == &elf_i386_arch_bed
));
1542 symtab_hdr
= &elf_symtab_hdr (abfd
);
1543 sym_hashes
= elf_sym_hashes (abfd
);
1547 rel_end
= relocs
+ sec
->reloc_count
;
1548 for (rel
= relocs
; rel
< rel_end
; rel
++)
1550 unsigned int r_type
;
1551 unsigned long r_symndx
;
1552 struct elf_link_hash_entry
*h
;
1553 struct elf_i386_link_hash_entry
*eh
;
1554 Elf_Internal_Sym
*isym
;
1556 bfd_boolean size_reloc
;
1558 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1559 r_type
= ELF32_R_TYPE (rel
->r_info
);
1561 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1563 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1569 if (r_symndx
< symtab_hdr
->sh_info
)
1571 /* A local symbol. */
1572 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1577 /* Check relocation against local STT_GNU_IFUNC symbol. */
1578 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1580 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1584 /* Fake a STT_GNU_IFUNC symbol. */
1585 h
->type
= STT_GNU_IFUNC
;
1588 h
->forced_local
= 1;
1589 h
->root
.type
= bfd_link_hash_defined
;
1597 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1598 while (h
->root
.type
== bfd_link_hash_indirect
1599 || h
->root
.type
== bfd_link_hash_warning
)
1600 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1603 eh
= (struct elf_i386_link_hash_entry
*) h
;
1606 /* Create the ifunc sections for static executables. If we
1607 never see an indirect function symbol nor we are building
1608 a static executable, those sections will be empty and
1609 won't appear in output. */
1622 if (htab
->elf
.dynobj
== NULL
)
1623 htab
->elf
.dynobj
= abfd
;
1624 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1629 /* It is referenced by a non-shared object. */
1631 h
->root
.non_ir_ref
= 1;
1633 if (h
->type
== STT_GNU_IFUNC
)
1634 elf_tdata (info
->output_bfd
)->has_gnu_symbols
1635 |= elf_gnu_symbol_ifunc
;
1638 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1639 symtab_hdr
, sym_hashes
,
1640 &r_type
, GOT_UNKNOWN
,
1641 rel
, rel_end
, h
, r_symndx
))
1647 htab
->tls_ldm_got
.refcount
+= 1;
1651 /* This symbol requires a procedure linkage table entry. We
1652 actually build the entry in adjust_dynamic_symbol,
1653 because this might be a case of linking PIC code which is
1654 never referenced by a dynamic object, in which case we
1655 don't need to generate a procedure linkage table entry
1658 /* If this is a local symbol, we resolve it directly without
1659 creating a procedure linkage table entry. */
1663 eh
->has_got_reloc
= 1;
1665 h
->plt
.refcount
+= 1;
1672 case R_386_TLS_IE_32
:
1674 case R_386_TLS_GOTIE
:
1675 if (!bfd_link_executable (info
))
1676 info
->flags
|= DF_STATIC_TLS
;
1682 case R_386_TLS_GOTDESC
:
1683 case R_386_TLS_DESC_CALL
:
1684 /* This symbol requires a global offset table entry. */
1686 int tls_type
, old_tls_type
;
1693 tls_type
= GOT_NORMAL
;
1695 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1696 case R_386_TLS_GOTDESC
:
1697 case R_386_TLS_DESC_CALL
:
1698 tls_type
= GOT_TLS_GDESC
; break;
1699 case R_386_TLS_IE_32
:
1700 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1701 tls_type
= GOT_TLS_IE_NEG
;
1703 /* If this is a GD->IE transition, we may use either of
1704 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1705 tls_type
= GOT_TLS_IE
;
1708 case R_386_TLS_GOTIE
:
1709 tls_type
= GOT_TLS_IE_POS
; break;
1714 h
->got
.refcount
+= 1;
1715 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1719 bfd_signed_vma
*local_got_refcounts
;
1721 /* This is a global offset table entry for a local symbol. */
1722 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1723 if (local_got_refcounts
== NULL
)
1727 size
= symtab_hdr
->sh_info
;
1728 size
*= (sizeof (bfd_signed_vma
)
1729 + sizeof (bfd_vma
) + sizeof(char));
1730 local_got_refcounts
= (bfd_signed_vma
*)
1731 bfd_zalloc (abfd
, size
);
1732 if (local_got_refcounts
== NULL
)
1734 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1735 elf_i386_local_tlsdesc_gotent (abfd
)
1736 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1737 elf_i386_local_got_tls_type (abfd
)
1738 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1740 local_got_refcounts
[r_symndx
] += 1;
1741 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1744 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1745 tls_type
|= old_tls_type
;
1746 /* If a TLS symbol is accessed using IE at least once,
1747 there is no point to use dynamic model for it. */
1748 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1749 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1750 || (tls_type
& GOT_TLS_IE
) == 0))
1752 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1753 tls_type
= old_tls_type
;
1754 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1755 && GOT_TLS_GD_ANY_P (tls_type
))
1756 tls_type
|= old_tls_type
;
1760 name
= h
->root
.root
.string
;
1762 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1764 (*_bfd_error_handler
)
1765 (_("%B: `%s' accessed both as normal and "
1766 "thread local symbol"),
1768 bfd_set_error (bfd_error_bad_value
);
1773 if (old_tls_type
!= tls_type
)
1776 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1778 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1786 if (htab
->elf
.sgot
== NULL
)
1788 if (htab
->elf
.dynobj
== NULL
)
1789 htab
->elf
.dynobj
= abfd
;
1790 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1793 if (r_type
!= R_386_TLS_IE
)
1796 eh
->has_got_reloc
= 1;
1801 case R_386_TLS_LE_32
:
1804 eh
->has_got_reloc
= 1;
1805 if (bfd_link_executable (info
))
1807 info
->flags
|= DF_STATIC_TLS
;
1812 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
1813 eh
->has_non_got_reloc
= 1;
1815 /* STT_GNU_IFUNC symbol must go through PLT even if it is
1816 locally defined and undefined symbol may turn out to be
1817 a STT_GNU_IFUNC symbol later. */
1819 && (bfd_link_executable (info
)
1820 || ((h
->type
== STT_GNU_IFUNC
1821 || h
->root
.type
== bfd_link_hash_undefweak
1822 || h
->root
.type
== bfd_link_hash_undefined
)
1823 && SYMBOLIC_BIND (info
, h
))))
1825 /* If this reloc is in a read-only section, we might
1826 need a copy reloc. We can't check reliably at this
1827 stage whether the section is read-only, as input
1828 sections have not yet been mapped to output sections.
1829 Tentatively set the flag for now, and correct in
1830 adjust_dynamic_symbol. */
1833 /* We may need a .plt entry if the function this reloc
1834 refers to is in a shared lib. */
1835 h
->plt
.refcount
+= 1;
1836 if (r_type
== R_386_PC32
)
1838 /* Since something like ".long foo - ." may be used
1839 as pointer, make sure that PLT is used if foo is
1840 a function defined in a shared library. */
1841 if ((sec
->flags
& SEC_CODE
) == 0)
1842 h
->pointer_equality_needed
= 1;
1846 h
->pointer_equality_needed
= 1;
1847 /* R_386_32 can be resolved at run-time. */
1848 if (r_type
== R_386_32
1849 && (sec
->flags
& SEC_READONLY
) == 0)
1850 eh
->func_pointer_refcount
+= 1;
1856 /* If we are creating a shared library, and this is a reloc
1857 against a global symbol, or a non PC relative reloc
1858 against a local symbol, then we need to copy the reloc
1859 into the shared library. However, if we are linking with
1860 -Bsymbolic, we do not need to copy a reloc against a
1861 global symbol which is defined in an object we are
1862 including in the link (i.e., DEF_REGULAR is set). At
1863 this point we have not seen all the input files, so it is
1864 possible that DEF_REGULAR is not set now but will be set
1865 later (it is never cleared). In case of a weak definition,
1866 DEF_REGULAR may be cleared later by a strong definition in
1867 a shared library. We account for that possibility below by
1868 storing information in the relocs_copied field of the hash
1869 table entry. A similar situation occurs when creating
1870 shared libraries and symbol visibility changes render the
1873 If on the other hand, we are creating an executable, we
1874 may need to keep relocations for symbols satisfied by a
1875 dynamic library if we manage to avoid copy relocs for the
1877 if ((bfd_link_pic (info
)
1878 && (sec
->flags
& SEC_ALLOC
) != 0
1879 && (r_type
!= R_386_PC32
1881 && (! (bfd_link_pie (info
)
1882 || SYMBOLIC_BIND (info
, h
))
1883 || h
->root
.type
== bfd_link_hash_defweak
1884 || !h
->def_regular
))))
1885 || (ELIMINATE_COPY_RELOCS
1886 && !bfd_link_pic (info
)
1887 && (sec
->flags
& SEC_ALLOC
) != 0
1889 && (h
->root
.type
== bfd_link_hash_defweak
1890 || !h
->def_regular
)))
1892 struct elf_dyn_relocs
*p
;
1893 struct elf_dyn_relocs
**head
;
1895 /* We must copy these reloc types into the output file.
1896 Create a reloc section in dynobj and make room for
1900 if (htab
->elf
.dynobj
== NULL
)
1901 htab
->elf
.dynobj
= abfd
;
1903 sreloc
= _bfd_elf_make_dynamic_reloc_section
1904 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1910 /* If this is a global symbol, we count the number of
1911 relocations we need for this symbol. */
1914 head
= &eh
->dyn_relocs
;
1918 /* Track dynamic relocs needed for local syms too.
1919 We really need local syms available to do this
1924 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1929 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1933 vpp
= &elf_section_data (s
)->local_dynrel
;
1934 head
= (struct elf_dyn_relocs
**)vpp
;
1938 if (p
== NULL
|| p
->sec
!= sec
)
1940 bfd_size_type amt
= sizeof *p
;
1941 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1953 /* Count size relocation as PC-relative relocation. */
1954 if (r_type
== R_386_PC32
|| size_reloc
)
1959 /* This relocation describes the C++ object vtable hierarchy.
1960 Reconstruct it for later use during GC. */
1961 case R_386_GNU_VTINHERIT
:
1962 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1966 /* This relocation describes which C++ vtable entries are actually
1967 used. Record for later use during GC. */
1968 case R_386_GNU_VTENTRY
:
1969 BFD_ASSERT (h
!= NULL
);
1971 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1981 && h
->plt
.refcount
> 0
1982 && (((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
1983 || h
->got
.refcount
> 0)
1984 && htab
->plt_got
== NULL
)
1986 /* Create the GOT procedure linkage table. */
1987 unsigned int plt_got_align
;
1988 const struct elf_backend_data
*bed
;
1990 bed
= get_elf_backend_data (info
->output_bfd
);
1991 BFD_ASSERT (sizeof (elf_i386_got_plt_entry
) == 8
1992 && (sizeof (elf_i386_got_plt_entry
)
1993 == sizeof (elf_i386_pic_got_plt_entry
)));
1996 if (htab
->elf
.dynobj
== NULL
)
1997 htab
->elf
.dynobj
= abfd
;
1999 = bfd_make_section_anyway_with_flags (htab
->elf
.dynobj
,
2001 (bed
->dynamic_sec_flags
2006 if (htab
->plt_got
== NULL
2007 || !bfd_set_section_alignment (htab
->elf
.dynobj
,
2013 if ((r_type
== R_386_GOT32
|| r_type
== R_386_GOT32X
)
2014 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2015 sec
->need_convert_load
= 1;
2021 /* Return the section that should be marked against GC for a given
2025 elf_i386_gc_mark_hook (asection
*sec
,
2026 struct bfd_link_info
*info
,
2027 Elf_Internal_Rela
*rel
,
2028 struct elf_link_hash_entry
*h
,
2029 Elf_Internal_Sym
*sym
)
2032 switch (ELF32_R_TYPE (rel
->r_info
))
2034 case R_386_GNU_VTINHERIT
:
2035 case R_386_GNU_VTENTRY
:
2039 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2042 /* Update the got entry reference counts for the section being removed. */
2045 elf_i386_gc_sweep_hook (bfd
*abfd
,
2046 struct bfd_link_info
*info
,
2048 const Elf_Internal_Rela
*relocs
)
2050 struct elf_i386_link_hash_table
*htab
;
2051 Elf_Internal_Shdr
*symtab_hdr
;
2052 struct elf_link_hash_entry
**sym_hashes
;
2053 bfd_signed_vma
*local_got_refcounts
;
2054 const Elf_Internal_Rela
*rel
, *relend
;
2056 if (bfd_link_relocatable (info
))
2059 htab
= elf_i386_hash_table (info
);
2063 elf_section_data (sec
)->local_dynrel
= NULL
;
2065 symtab_hdr
= &elf_symtab_hdr (abfd
);
2066 sym_hashes
= elf_sym_hashes (abfd
);
2067 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2069 relend
= relocs
+ sec
->reloc_count
;
2070 for (rel
= relocs
; rel
< relend
; rel
++)
2072 unsigned long r_symndx
;
2073 unsigned int r_type
;
2074 struct elf_link_hash_entry
*h
= NULL
;
2076 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2077 if (r_symndx
>= symtab_hdr
->sh_info
)
2079 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2080 while (h
->root
.type
== bfd_link_hash_indirect
2081 || h
->root
.type
== bfd_link_hash_warning
)
2082 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2086 /* A local symbol. */
2087 Elf_Internal_Sym
*isym
;
2089 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2092 /* Check relocation against local STT_GNU_IFUNC symbol. */
2094 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2096 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
2104 struct elf_i386_link_hash_entry
*eh
;
2105 struct elf_dyn_relocs
**pp
;
2106 struct elf_dyn_relocs
*p
;
2108 eh
= (struct elf_i386_link_hash_entry
*) h
;
2109 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
2112 /* Everything must go for SEC. */
2118 r_type
= ELF32_R_TYPE (rel
->r_info
);
2119 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
2120 symtab_hdr
, sym_hashes
,
2121 &r_type
, GOT_UNKNOWN
,
2122 rel
, relend
, h
, r_symndx
))
2128 if (htab
->tls_ldm_got
.refcount
> 0)
2129 htab
->tls_ldm_got
.refcount
-= 1;
2133 case R_386_TLS_GOTDESC
:
2134 case R_386_TLS_DESC_CALL
:
2135 case R_386_TLS_IE_32
:
2137 case R_386_TLS_GOTIE
:
2142 if (h
->got
.refcount
> 0)
2143 h
->got
.refcount
-= 1;
2144 if (h
->type
== STT_GNU_IFUNC
)
2146 if (h
->plt
.refcount
> 0)
2147 h
->plt
.refcount
-= 1;
2150 else if (local_got_refcounts
!= NULL
)
2152 if (local_got_refcounts
[r_symndx
] > 0)
2153 local_got_refcounts
[r_symndx
] -= 1;
2160 if (bfd_link_pic (info
)
2161 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2168 if (h
->plt
.refcount
> 0)
2169 h
->plt
.refcount
-= 1;
2170 if (r_type
== R_386_32
2171 && (sec
->flags
& SEC_READONLY
) == 0)
2173 struct elf_i386_link_hash_entry
*eh
2174 = (struct elf_i386_link_hash_entry
*) h
;
2175 if (eh
->func_pointer_refcount
> 0)
2176 eh
->func_pointer_refcount
-= 1;
2182 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
2184 if (h
->got
.refcount
> 0)
2185 h
->got
.refcount
-= 1;
2186 if (h
->plt
.refcount
> 0)
2187 h
->plt
.refcount
-= 1;
2199 /* Remove undefined weak symbol from the dynamic symbol table if it
2200 is resolved to 0. */
2203 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2204 struct elf_link_hash_entry
*h
)
2206 if (h
->dynindx
!= -1
2207 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2208 elf_i386_hash_entry (h
)))
2211 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2217 /* Adjust a symbol defined by a dynamic object and referenced by a
2218 regular object. The current definition is in some section of the
2219 dynamic object, but we're not including those sections. We have to
2220 change the definition to something the rest of the link can
2224 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2225 struct elf_link_hash_entry
*h
)
2227 struct elf_i386_link_hash_table
*htab
;
2229 struct elf_i386_link_hash_entry
*eh
;
2230 struct elf_dyn_relocs
*p
;
2232 /* STT_GNU_IFUNC symbol must go through PLT. */
2233 if (h
->type
== STT_GNU_IFUNC
)
2235 /* All local STT_GNU_IFUNC references must be treate as local
2236 calls via local PLT. */
2238 && SYMBOL_CALLS_LOCAL (info
, h
))
2240 bfd_size_type pc_count
= 0, count
= 0;
2241 struct elf_dyn_relocs
**pp
;
2243 eh
= (struct elf_i386_link_hash_entry
*) h
;
2244 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2246 pc_count
+= p
->pc_count
;
2247 p
->count
-= p
->pc_count
;
2256 if (pc_count
|| count
)
2260 if (h
->plt
.refcount
<= 0)
2261 h
->plt
.refcount
= 1;
2263 h
->plt
.refcount
+= 1;
2267 if (h
->plt
.refcount
<= 0)
2269 h
->plt
.offset
= (bfd_vma
) -1;
2275 /* If this is a function, put it in the procedure linkage table. We
2276 will fill in the contents of the procedure linkage table later,
2277 when we know the address of the .got section. */
2278 if (h
->type
== STT_FUNC
2281 if (h
->plt
.refcount
<= 0
2282 || SYMBOL_CALLS_LOCAL (info
, h
)
2283 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2284 && h
->root
.type
== bfd_link_hash_undefweak
))
2286 /* This case can occur if we saw a PLT32 reloc in an input
2287 file, but the symbol was never referred to by a dynamic
2288 object, or if all references were garbage collected. In
2289 such a case, we don't actually need to build a procedure
2290 linkage table, and we can just do a PC32 reloc instead. */
2291 h
->plt
.offset
= (bfd_vma
) -1;
2298 /* It's possible that we incorrectly decided a .plt reloc was
2299 needed for an R_386_PC32 reloc to a non-function sym in
2300 check_relocs. We can't decide accurately between function and
2301 non-function syms in check-relocs; Objects loaded later in
2302 the link may change h->type. So fix it now. */
2303 h
->plt
.offset
= (bfd_vma
) -1;
2305 /* If this is a weak symbol, and there is a real definition, the
2306 processor independent code will have arranged for us to see the
2307 real definition first, and we can just use the same value. */
2308 if (h
->u
.weakdef
!= NULL
)
2310 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2311 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2312 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2313 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2314 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2315 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2319 /* This is a reference to a symbol defined by a dynamic object which
2320 is not a function. */
2322 /* If we are creating a shared library, we must presume that the
2323 only references to the symbol are via the global offset table.
2324 For such cases we need not do anything here; the relocations will
2325 be handled correctly by relocate_section. */
2326 if (!bfd_link_executable (info
))
2329 /* If there are no references to this symbol that do not use the
2330 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2332 eh
= (struct elf_i386_link_hash_entry
*) h
;
2333 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2336 /* If -z nocopyreloc was given, we won't generate them either. */
2337 if (info
->nocopyreloc
)
2343 htab
= elf_i386_hash_table (info
);
2347 /* If there aren't any dynamic relocs in read-only sections nor
2348 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2349 avoid the copy reloc. This doesn't work on VxWorks, where we can
2350 not have dynamic relocations (other than copy and jump slot
2351 relocations) in an executable. */
2352 if (ELIMINATE_COPY_RELOCS
2354 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2356 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2358 s
= p
->sec
->output_section
;
2359 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2370 /* We must allocate the symbol in our .dynbss section, which will
2371 become part of the .bss section of the executable. There will be
2372 an entry for this symbol in the .dynsym section. The dynamic
2373 object will contain position independent code, so all references
2374 from the dynamic object to this symbol will go through the global
2375 offset table. The dynamic linker will use the .dynsym entry to
2376 determine the address it must put in the global offset table, so
2377 both the dynamic object and the regular object will refer to the
2378 same memory location for the variable. */
2380 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2381 copy the initial value out of the dynamic object and into the
2382 runtime process image. */
2383 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2385 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2391 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2394 /* Allocate space in .plt, .got and associated reloc sections for
2398 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2400 struct bfd_link_info
*info
;
2401 struct elf_i386_link_hash_table
*htab
;
2402 struct elf_i386_link_hash_entry
*eh
;
2403 struct elf_dyn_relocs
*p
;
2404 unsigned plt_entry_size
;
2405 bfd_boolean resolved_to_zero
;
2407 if (h
->root
.type
== bfd_link_hash_indirect
)
2410 eh
= (struct elf_i386_link_hash_entry
*) h
;
2412 info
= (struct bfd_link_info
*) inf
;
2413 htab
= elf_i386_hash_table (info
);
2417 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2419 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
2421 /* Clear the reference count of function pointer relocations if
2422 symbol isn't a normal function. */
2423 if (h
->type
!= STT_FUNC
)
2424 eh
->func_pointer_refcount
= 0;
2426 /* We can't use the GOT PLT if pointer equality is needed since
2427 finish_dynamic_symbol won't clear symbol value and the dynamic
2428 linker won't update the GOT slot. We will get into an infinite
2429 loop at run-time. */
2430 if (htab
->plt_got
!= NULL
2431 && h
->type
!= STT_GNU_IFUNC
2432 && !h
->pointer_equality_needed
2433 && h
->plt
.refcount
> 0
2434 && h
->got
.refcount
> 0)
2436 /* Don't use the regular PLT if there are both GOT and GOTPLT
2438 h
->plt
.offset
= (bfd_vma
) -1;
2440 /* Use the GOT PLT. */
2441 eh
->plt_got
.refcount
= 1;
2444 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2445 here if it is defined and referenced in a non-shared object. */
2446 if (h
->type
== STT_GNU_IFUNC
2448 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2449 &htab
->readonly_dynrelocs_against_ifunc
,
2452 /* Don't create the PLT entry if there are only function pointer
2453 relocations which can be resolved at run-time. */
2454 else if (htab
->elf
.dynamic_sections_created
2455 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2456 || eh
->plt_got
.refcount
> 0))
2458 bfd_boolean use_plt_got
;
2460 /* Clear the reference count of function pointer relocations
2462 eh
->func_pointer_refcount
= 0;
2464 if ((info
->flags
& DF_BIND_NOW
) && !h
->pointer_equality_needed
)
2466 /* Don't use the regular PLT for DF_BIND_NOW. */
2467 h
->plt
.offset
= (bfd_vma
) -1;
2469 /* Use the GOT PLT. */
2470 h
->got
.refcount
= 1;
2471 eh
->plt_got
.refcount
= 1;
2474 use_plt_got
= eh
->plt_got
.refcount
> 0;
2476 /* Make sure this symbol is output as a dynamic symbol.
2477 Undefined weak syms won't yet be marked as dynamic. */
2478 if (h
->dynindx
== -1
2480 && !resolved_to_zero
)
2482 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2486 if (bfd_link_pic (info
)
2487 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2489 asection
*s
= htab
->elf
.splt
;
2490 asection
*got_s
= htab
->plt_got
;
2492 /* If this is the first .plt entry, make room for the special
2493 first entry. The .plt section is used by prelink to undo
2494 prelinking for dynamic relocations. */
2496 s
->size
= plt_entry_size
;
2499 eh
->plt_got
.offset
= got_s
->size
;
2501 h
->plt
.offset
= s
->size
;
2503 /* If this symbol is not defined in a regular file, and we are
2504 not generating a shared library, then set the symbol to this
2505 location in the .plt. This is required to make function
2506 pointers compare as equal between the normal executable and
2507 the shared library. */
2508 if (! bfd_link_pic (info
)
2513 /* We need to make a call to the entry of the GOT PLT
2514 instead of regular PLT entry. */
2515 h
->root
.u
.def
.section
= got_s
;
2516 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2520 h
->root
.u
.def
.section
= s
;
2521 h
->root
.u
.def
.value
= h
->plt
.offset
;
2525 /* Make room for this entry. */
2527 got_s
->size
+= sizeof (elf_i386_got_plt_entry
);
2530 s
->size
+= plt_entry_size
;
2532 /* We also need to make an entry in the .got.plt section,
2533 which will be placed in the .got section by the linker
2535 htab
->elf
.sgotplt
->size
+= 4;
2537 /* There should be no PLT relocation against resolved
2538 undefined weak symbol in executable. */
2539 if (!resolved_to_zero
)
2541 /* We also need to make an entry in the .rel.plt
2543 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2544 htab
->elf
.srelplt
->reloc_count
++;
2548 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2549 && !bfd_link_pic (info
))
2551 /* VxWorks has a second set of relocations for each PLT entry
2552 in executables. They go in a separate relocation section,
2553 which is processed by the kernel loader. */
2555 /* There are two relocations for the initial PLT entry: an
2556 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2557 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2559 if (h
->plt
.offset
== plt_entry_size
)
2560 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2562 /* There are two extra relocations for each subsequent PLT entry:
2563 an R_386_32 relocation for the GOT entry, and an R_386_32
2564 relocation for the PLT entry. */
2566 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2571 eh
->plt_got
.offset
= (bfd_vma
) -1;
2572 h
->plt
.offset
= (bfd_vma
) -1;
2578 eh
->plt_got
.offset
= (bfd_vma
) -1;
2579 h
->plt
.offset
= (bfd_vma
) -1;
2583 eh
->tlsdesc_got
= (bfd_vma
) -1;
2585 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2586 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2587 if (h
->got
.refcount
> 0
2588 && bfd_link_executable (info
)
2590 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2591 h
->got
.offset
= (bfd_vma
) -1;
2592 else if (h
->got
.refcount
> 0)
2596 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2598 /* Make sure this symbol is output as a dynamic symbol.
2599 Undefined weak syms won't yet be marked as dynamic. */
2600 if (h
->dynindx
== -1
2602 && !resolved_to_zero
)
2604 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2609 if (GOT_TLS_GDESC_P (tls_type
))
2611 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2612 - elf_i386_compute_jump_table_size (htab
);
2613 htab
->elf
.sgotplt
->size
+= 8;
2614 h
->got
.offset
= (bfd_vma
) -2;
2616 if (! GOT_TLS_GDESC_P (tls_type
)
2617 || GOT_TLS_GD_P (tls_type
))
2619 h
->got
.offset
= s
->size
;
2621 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2622 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2625 dyn
= htab
->elf
.dynamic_sections_created
;
2626 /* R_386_TLS_IE_32 needs one dynamic relocation,
2627 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2628 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2629 need two), R_386_TLS_GD needs one if local symbol and two if
2630 global. No dynamic relocation against resolved undefined weak
2631 symbol in executable. */
2632 if (tls_type
== GOT_TLS_IE_BOTH
)
2633 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2634 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2635 || (tls_type
& GOT_TLS_IE
))
2636 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2637 else if (GOT_TLS_GD_P (tls_type
))
2638 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2639 else if (! GOT_TLS_GDESC_P (tls_type
)
2640 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2641 && !resolved_to_zero
)
2642 || h
->root
.type
!= bfd_link_hash_undefweak
)
2643 && (bfd_link_pic (info
)
2644 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2645 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2646 if (GOT_TLS_GDESC_P (tls_type
))
2647 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2650 h
->got
.offset
= (bfd_vma
) -1;
2652 if (eh
->dyn_relocs
== NULL
)
2655 /* In the shared -Bsymbolic case, discard space allocated for
2656 dynamic pc-relative relocs against symbols which turn out to be
2657 defined in regular objects. For the normal shared case, discard
2658 space for pc-relative relocs that have become local due to symbol
2659 visibility changes. */
2661 if (bfd_link_pic (info
))
2663 /* The only reloc that uses pc_count is R_386_PC32, which will
2664 appear on a call or on something like ".long foo - .". We
2665 want calls to protected symbols to resolve directly to the
2666 function rather than going via the plt. If people want
2667 function pointer comparisons to work as expected then they
2668 should avoid writing assembly like ".long foo - .". */
2669 if (SYMBOL_CALLS_LOCAL (info
, h
))
2671 struct elf_dyn_relocs
**pp
;
2673 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2675 p
->count
-= p
->pc_count
;
2684 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2686 struct elf_dyn_relocs
**pp
;
2687 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2689 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2696 /* Also discard relocs on undefined weak syms with non-default
2697 visibility or in PIE. */
2698 if (eh
->dyn_relocs
!= NULL
2699 && h
->root
.type
== bfd_link_hash_undefweak
)
2701 /* Undefined weak symbol is never bound locally in shared
2703 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2704 || resolved_to_zero
)
2708 /* Keep dynamic non-GOT/non-PLT relocation so that we
2709 can branch to 0 without PLT. */
2710 struct elf_dyn_relocs
**pp
;
2712 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2713 if (p
->pc_count
== 0)
2717 /* Remove non-R_386_PC32 relocation. */
2718 p
->count
= p
->pc_count
;
2722 if (eh
->dyn_relocs
!= NULL
)
2724 /* Make sure undefined weak symbols are output
2725 as dynamic symbols in PIEs for dynamic non-GOT
2726 non-PLT reloations. */
2727 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2732 eh
->dyn_relocs
= NULL
;
2734 else if (h
->dynindx
== -1
2735 && !h
->forced_local
)
2737 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2742 else if (ELIMINATE_COPY_RELOCS
)
2744 /* For the non-shared case, discard space for relocs against
2745 symbols which turn out to need copy relocs or are not
2746 dynamic. Keep dynamic relocations for run-time function
2747 pointer initialization. */
2749 if ((!h
->non_got_ref
2750 || eh
->func_pointer_refcount
> 0
2751 || (h
->root
.type
== bfd_link_hash_undefweak
2752 && !resolved_to_zero
))
2755 || (htab
->elf
.dynamic_sections_created
2756 && (h
->root
.type
== bfd_link_hash_undefweak
2757 || h
->root
.type
== bfd_link_hash_undefined
))))
2759 /* Make sure this symbol is output as a dynamic symbol.
2760 Undefined weak syms won't yet be marked as dynamic. */
2761 if (h
->dynindx
== -1
2763 && !resolved_to_zero
)
2765 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2769 /* If that succeeded, we know we'll be keeping all the
2771 if (h
->dynindx
!= -1)
2775 eh
->dyn_relocs
= NULL
;
2776 eh
->func_pointer_refcount
= 0;
2781 /* Finally, allocate space. */
2782 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2786 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2788 BFD_ASSERT (sreloc
!= NULL
);
2789 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2795 /* Allocate space in .plt, .got and associated reloc sections for
2796 local dynamic relocs. */
2799 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2801 struct elf_link_hash_entry
*h
2802 = (struct elf_link_hash_entry
*) *slot
;
2804 if (h
->type
!= STT_GNU_IFUNC
2808 || h
->root
.type
!= bfd_link_hash_defined
)
2811 return elf_i386_allocate_dynrelocs (h
, inf
);
2814 /* Find any dynamic relocs that apply to read-only sections. */
2817 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2819 struct elf_i386_link_hash_entry
*eh
;
2820 struct elf_dyn_relocs
*p
;
2822 /* Skip local IFUNC symbols. */
2823 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2826 eh
= (struct elf_i386_link_hash_entry
*) h
;
2827 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2829 asection
*s
= p
->sec
->output_section
;
2831 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2833 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2835 info
->flags
|= DF_TEXTREL
;
2837 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
2838 || info
->error_textrel
)
2839 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2840 p
->sec
->owner
, h
->root
.root
.string
,
2843 /* Not an error, just cut short the traversal. */
2850 /* With the local symbol, foo, we convert
2851 mov foo@GOT[(%reg1)], %reg2
2853 lea foo[@GOTOFF(%reg1)], %reg2
2855 call/jmp *foo@GOT[(%reg)]
2857 nop call foo/jmp foo nop
2858 When PIC is false, convert
2859 test %reg1, foo@GOT[(%reg2)]
2863 binop foo@GOT[(%reg1)], %reg2
2866 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2870 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
2871 struct bfd_link_info
*link_info
)
2873 Elf_Internal_Shdr
*symtab_hdr
;
2874 Elf_Internal_Rela
*internal_relocs
;
2875 Elf_Internal_Rela
*irel
, *irelend
;
2877 struct elf_i386_link_hash_table
*htab
;
2878 bfd_boolean changed_contents
;
2879 bfd_boolean changed_relocs
;
2881 bfd_signed_vma
*local_got_refcounts
;
2883 /* Don't even try to convert non-ELF outputs. */
2884 if (!is_elf_hash_table (link_info
->hash
))
2887 /* Nothing to do if there is no need or no output. */
2888 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2889 || sec
->need_convert_load
== 0
2890 || bfd_is_abs_section (sec
->output_section
))
2893 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2895 /* Load the relocations for this section. */
2896 internal_relocs
= (_bfd_elf_link_read_relocs
2897 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2898 link_info
->keep_memory
));
2899 if (internal_relocs
== NULL
)
2902 htab
= elf_i386_hash_table (link_info
);
2903 changed_contents
= FALSE
;
2904 changed_relocs
= FALSE
;
2905 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2907 is_pic
= bfd_link_pic (link_info
);
2909 /* Get the section contents. */
2910 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2911 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2914 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2918 irelend
= internal_relocs
+ sec
->reloc_count
;
2919 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2921 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2922 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2924 struct elf_link_hash_entry
*h
;
2925 unsigned int opcode
;
2928 bfd_boolean baseless
;
2929 Elf_Internal_Sym
*isym
;
2930 unsigned int addend
;
2933 bfd_boolean to_reloc_32
;
2935 if (r_type
!= R_386_GOT32
&& r_type
!= R_386_GOT32X
)
2938 roff
= irel
->r_offset
;
2942 /* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
2943 addend
= bfd_get_32 (abfd
, contents
+ roff
);
2947 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
2948 baseless
= (modrm
& 0xc7) == 0x5;
2950 if (r_type
== R_386_GOT32X
&& baseless
&& is_pic
)
2952 /* For PIC, disallow R_386_GOT32X without a base register
2953 since we don't know what the GOT base is. Allow
2954 R_386_GOT32 for existing object files. */
2957 if (r_symndx
< symtab_hdr
->sh_info
)
2959 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
2961 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
2965 indx
= r_symndx
- symtab_hdr
->sh_info
;
2966 h
= elf_sym_hashes (abfd
)[indx
];
2967 BFD_ASSERT (h
!= NULL
);
2968 name
= h
->root
.root
.string
;
2971 (*_bfd_error_handler
)
2972 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
2977 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
2979 /* Convert mov to lea since it has been done for a while. */
2982 /* Only convert R_386_GOT32X relocation for call, jmp or
2983 one of adc, add, and, cmp, or, sbb, sub, test, xor
2985 if (r_type
!= R_386_GOT32X
)
2989 /* Convert to R_386_32 if PIC is false or there is no base
2991 to_reloc_32
= !is_pic
|| baseless
;
2993 /* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
2994 referred to by the reloc. */
2995 if (r_symndx
< symtab_hdr
->sh_info
)
2997 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
3000 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3001 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3005 if (opcode
== 0x0ff)
3006 /* Convert "call/jmp *foo@GOT[(%reg)]". */
3007 goto convert_branch
;
3009 /* Convert "mov foo@GOT[(%reg1)], %reg2",
3010 "test %reg1, foo@GOT(%reg2)" and
3011 "binop foo@GOT[(%reg1)], %reg2". */
3015 indx
= r_symndx
- symtab_hdr
->sh_info
;
3016 h
= elf_sym_hashes (abfd
)[indx
];
3017 BFD_ASSERT (h
!= NULL
);
3019 while (h
->root
.type
== bfd_link_hash_indirect
3020 || h
->root
.type
== bfd_link_hash_warning
)
3021 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3023 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3024 if (h
->type
== STT_GNU_IFUNC
)
3027 /* Undefined weak symbol is only bound locally in executable
3028 and its reference is resolved as 0. */
3029 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
,
3030 elf_i386_hash_entry (h
)))
3034 /* No direct branch to 0 for PIC. */
3038 goto convert_branch
;
3042 /* We can convert load of address 0 to R_386_32. */
3050 /* We have "call/jmp *foo@GOT[(%reg)]". */
3051 if ((h
->root
.type
== bfd_link_hash_defined
3052 || h
->root
.type
== bfd_link_hash_defweak
)
3053 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
3055 /* The function is locally defined. */
3057 /* Convert R_386_GOT32X to R_386_PC32. */
3058 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
3060 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3063 nop
= link_info
->call_nop_byte
;
3064 if (link_info
->call_nop_as_suffix
)
3066 nop_offset
= roff
+ 3;
3067 irel
->r_offset
-= 1;
3070 nop_offset
= roff
- 2;
3074 /* Convert to "jmp foo nop". */
3077 nop_offset
= roff
+ 3;
3078 irel
->r_offset
-= 1;
3081 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
3082 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
3083 /* When converting to PC-relative relocation, we
3084 need to adjust addend by -4. */
3085 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
3086 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
3090 if (h
->got
.refcount
> 0)
3091 h
->got
.refcount
-= 1;
3095 if (local_got_refcounts
!= NULL
3096 && local_got_refcounts
[r_symndx
] > 0)
3097 local_got_refcounts
[r_symndx
] -= 1;
3100 changed_contents
= TRUE
;
3101 changed_relocs
= TRUE
;
3106 /* We have "mov foo@GOT[(%re1g)], %reg2",
3107 "test %reg1, foo@GOT(%reg2)" and
3108 "binop foo@GOT[(%reg1)], %reg2".
3110 Avoid optimizing _DYNAMIC since ld.so may use its
3111 link-time address. */
3112 if (h
== htab
->elf
.hdynamic
)
3115 /* def_regular is set by an assignment in a linker script in
3116 bfd_elf_record_link_assignment. */
3118 || h
->root
.type
== bfd_link_hash_defined
3119 || h
->root
.type
== bfd_link_hash_defweak
)
3120 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
3127 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
3128 "mov $foo, %reg2" with R_386_32. */
3130 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
3131 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
3136 /* Convert "mov foo@GOT(%reg1), %reg2" to
3137 "lea foo@GOTOFF(%reg1), %reg2". */
3138 r_type
= R_386_GOTOFF
;
3144 /* Only R_386_32 is supported. */
3150 /* Convert "test %reg1, foo@GOT(%reg2)" to
3151 "test $foo, %reg1". */
3152 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
3157 /* Convert "binop foo@GOT(%reg1), %reg2" to
3158 "binop $foo, %reg2". */
3160 | (modrm
& 0x38) >> 3
3164 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
3168 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
3169 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
3173 if (h
->got
.refcount
> 0)
3174 h
->got
.refcount
-= 1;
3178 if (local_got_refcounts
!= NULL
3179 && local_got_refcounts
[r_symndx
] > 0)
3180 local_got_refcounts
[r_symndx
] -= 1;
3183 changed_contents
= TRUE
;
3184 changed_relocs
= TRUE
;
3189 if (contents
!= NULL
3190 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3192 if (!changed_contents
&& !link_info
->keep_memory
)
3196 /* Cache the section contents for elf_link_input_bfd. */
3197 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3201 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3203 if (!changed_relocs
)
3204 free (internal_relocs
);
3206 elf_section_data (sec
)->relocs
= internal_relocs
;
3212 if (contents
!= NULL
3213 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3215 if (internal_relocs
!= NULL
3216 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3217 free (internal_relocs
);
3221 /* Set the sizes of the dynamic sections. */
3224 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3226 struct elf_i386_link_hash_table
*htab
;
3232 htab
= elf_i386_hash_table (info
);
3235 dynobj
= htab
->elf
.dynobj
;
3239 if (htab
->elf
.dynamic_sections_created
)
3241 /* Set the contents of the .interp section to the interpreter. */
3242 if (bfd_link_executable (info
) && !info
->nointerp
)
3244 s
= bfd_get_linker_section (dynobj
, ".interp");
3247 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
3248 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
3253 /* Set up .got offsets for local syms, and space for local dynamic
3255 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3257 bfd_signed_vma
*local_got
;
3258 bfd_signed_vma
*end_local_got
;
3259 char *local_tls_type
;
3260 bfd_vma
*local_tlsdesc_gotent
;
3261 bfd_size_type locsymcount
;
3262 Elf_Internal_Shdr
*symtab_hdr
;
3265 if (! is_i386_elf (ibfd
))
3268 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3270 struct elf_dyn_relocs
*p
;
3272 if (!elf_i386_convert_load (ibfd
, s
, info
))
3275 for (p
= ((struct elf_dyn_relocs
*)
3276 elf_section_data (s
)->local_dynrel
);
3280 if (!bfd_is_abs_section (p
->sec
)
3281 && bfd_is_abs_section (p
->sec
->output_section
))
3283 /* Input section has been discarded, either because
3284 it is a copy of a linkonce section or due to
3285 linker script /DISCARD/, so we'll be discarding
3288 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3289 && strcmp (p
->sec
->output_section
->name
,
3292 /* Relocations in vxworks .tls_vars sections are
3293 handled specially by the loader. */
3295 else if (p
->count
!= 0)
3297 srel
= elf_section_data (p
->sec
)->sreloc
;
3298 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3299 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3300 && (info
->flags
& DF_TEXTREL
) == 0)
3302 info
->flags
|= DF_TEXTREL
;
3303 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3304 || info
->error_textrel
)
3305 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3306 p
->sec
->owner
, p
->sec
);
3312 local_got
= elf_local_got_refcounts (ibfd
);
3316 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3317 locsymcount
= symtab_hdr
->sh_info
;
3318 end_local_got
= local_got
+ locsymcount
;
3319 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3320 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3322 srel
= htab
->elf
.srelgot
;
3323 for (; local_got
< end_local_got
;
3324 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3326 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3329 if (GOT_TLS_GDESC_P (*local_tls_type
))
3331 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3332 - elf_i386_compute_jump_table_size (htab
);
3333 htab
->elf
.sgotplt
->size
+= 8;
3334 *local_got
= (bfd_vma
) -2;
3336 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3337 || GOT_TLS_GD_P (*local_tls_type
))
3339 *local_got
= s
->size
;
3341 if (GOT_TLS_GD_P (*local_tls_type
)
3342 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3345 if (bfd_link_pic (info
)
3346 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3347 || (*local_tls_type
& GOT_TLS_IE
))
3349 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3350 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3351 else if (GOT_TLS_GD_P (*local_tls_type
)
3352 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3353 srel
->size
+= sizeof (Elf32_External_Rel
);
3354 if (GOT_TLS_GDESC_P (*local_tls_type
))
3355 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3359 *local_got
= (bfd_vma
) -1;
3363 if (htab
->tls_ldm_got
.refcount
> 0)
3365 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3367 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3368 htab
->elf
.sgot
->size
+= 8;
3369 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3372 htab
->tls_ldm_got
.offset
= -1;
3374 /* Allocate global sym .plt and .got entries, and space for global
3375 sym dynamic relocs. */
3376 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3378 /* Allocate .plt and .got entries, and space for local symbols. */
3379 htab_traverse (htab
->loc_hash_table
,
3380 elf_i386_allocate_local_dynrelocs
,
3383 /* For every jump slot reserved in the sgotplt, reloc_count is
3384 incremented. However, when we reserve space for TLS descriptors,
3385 it's not incremented, so in order to compute the space reserved
3386 for them, it suffices to multiply the reloc count by the jump
3389 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3390 so that R_386_IRELATIVE entries come last. */
3391 if (htab
->elf
.srelplt
)
3393 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3394 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3395 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3397 else if (htab
->elf
.irelplt
)
3398 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3401 if (htab
->elf
.sgotplt
)
3403 /* Don't allocate .got.plt section if there are no GOT nor PLT
3404 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3405 if ((htab
->elf
.hgot
== NULL
3406 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3407 && (htab
->elf
.sgotplt
->size
3408 == get_elf_backend_data (output_bfd
)->got_header_size
)
3409 && (htab
->elf
.splt
== NULL
3410 || htab
->elf
.splt
->size
== 0)
3411 && (htab
->elf
.sgot
== NULL
3412 || htab
->elf
.sgot
->size
== 0)
3413 && (htab
->elf
.iplt
== NULL
3414 || htab
->elf
.iplt
->size
== 0)
3415 && (htab
->elf
.igotplt
== NULL
3416 || htab
->elf
.igotplt
->size
== 0))
3417 htab
->elf
.sgotplt
->size
= 0;
3421 if (htab
->plt_eh_frame
!= NULL
3422 && htab
->elf
.splt
!= NULL
3423 && htab
->elf
.splt
->size
!= 0
3424 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
3425 && _bfd_elf_eh_frame_present (info
))
3426 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
3428 /* We now have determined the sizes of the various dynamic sections.
3429 Allocate memory for them. */
3431 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3433 bfd_boolean strip_section
= TRUE
;
3435 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3438 if (s
== htab
->elf
.splt
3439 || s
== htab
->elf
.sgot
)
3441 /* Strip this section if we don't need it; see the
3443 /* We'd like to strip these sections if they aren't needed, but if
3444 we've exported dynamic symbols from them we must leave them.
3445 It's too late to tell BFD to get rid of the symbols. */
3447 if (htab
->elf
.hplt
!= NULL
)
3448 strip_section
= FALSE
;
3450 else if (s
== htab
->elf
.sgotplt
3451 || s
== htab
->elf
.iplt
3452 || s
== htab
->elf
.igotplt
3453 || s
== htab
->plt_got
3454 || s
== htab
->plt_eh_frame
3455 || s
== htab
->sdynbss
)
3457 /* Strip these too. */
3459 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3462 && s
!= htab
->elf
.srelplt
3463 && s
!= htab
->srelplt2
)
3466 /* We use the reloc_count field as a counter if we need
3467 to copy relocs into the output file. */
3472 /* It's not one of our sections, so don't allocate space. */
3478 /* If we don't need this section, strip it from the
3479 output file. This is mostly to handle .rel.bss and
3480 .rel.plt. We must create both sections in
3481 create_dynamic_sections, because they must be created
3482 before the linker maps input sections to output
3483 sections. The linker does that before
3484 adjust_dynamic_symbol is called, and it is that
3485 function which decides whether anything needs to go
3486 into these sections. */
3488 s
->flags
|= SEC_EXCLUDE
;
3492 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3495 /* Allocate memory for the section contents. We use bfd_zalloc
3496 here in case unused entries are not reclaimed before the
3497 section's contents are written out. This should not happen,
3498 but this way if it does, we get a R_386_NONE reloc instead
3500 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3501 if (s
->contents
== NULL
)
3505 if (htab
->plt_eh_frame
!= NULL
3506 && htab
->plt_eh_frame
->contents
!= NULL
)
3508 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
3509 sizeof (elf_i386_eh_frame_plt
));
3510 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3511 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3514 if (htab
->elf
.dynamic_sections_created
)
3516 /* Add some entries to the .dynamic section. We fill in the
3517 values later, in elf_i386_finish_dynamic_sections, but we
3518 must add the entries now so that we get the correct size for
3519 the .dynamic section. The DT_DEBUG entry is filled in by the
3520 dynamic linker and used by the debugger. */
3521 #define add_dynamic_entry(TAG, VAL) \
3522 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3524 if (bfd_link_executable (info
))
3526 if (!add_dynamic_entry (DT_DEBUG
, 0))
3530 if (htab
->elf
.splt
->size
!= 0)
3532 /* DT_PLTGOT is used by prelink even if there is no PLT
3534 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3537 if (htab
->elf
.srelplt
->size
!= 0)
3539 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3540 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3541 || !add_dynamic_entry (DT_JMPREL
, 0))
3548 if (!add_dynamic_entry (DT_REL
, 0)
3549 || !add_dynamic_entry (DT_RELSZ
, 0)
3550 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3553 /* If any dynamic relocs apply to a read-only section,
3554 then we need a DT_TEXTREL entry. */
3555 if ((info
->flags
& DF_TEXTREL
) == 0)
3556 elf_link_hash_traverse (&htab
->elf
,
3557 elf_i386_readonly_dynrelocs
, info
);
3559 if ((info
->flags
& DF_TEXTREL
) != 0)
3561 if (htab
->readonly_dynrelocs_against_ifunc
)
3563 info
->callbacks
->einfo
3564 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3565 bfd_set_error (bfd_error_bad_value
);
3569 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3573 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3574 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3577 #undef add_dynamic_entry
3583 elf_i386_always_size_sections (bfd
*output_bfd
,
3584 struct bfd_link_info
*info
)
3586 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3590 struct elf_link_hash_entry
*tlsbase
;
3592 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3593 "_TLS_MODULE_BASE_",
3594 FALSE
, FALSE
, FALSE
);
3596 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3598 struct elf_i386_link_hash_table
*htab
;
3599 struct bfd_link_hash_entry
*bh
= NULL
;
3600 const struct elf_backend_data
*bed
3601 = get_elf_backend_data (output_bfd
);
3603 htab
= elf_i386_hash_table (info
);
3607 if (!(_bfd_generic_link_add_one_symbol
3608 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3609 tls_sec
, 0, NULL
, FALSE
,
3610 bed
->collect
, &bh
)))
3613 htab
->tls_module_base
= bh
;
3615 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3616 tlsbase
->def_regular
= 1;
3617 tlsbase
->other
= STV_HIDDEN
;
3618 tlsbase
->root
.linker_def
= 1;
3619 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3626 /* Set the correct type for an x86 ELF section. We do this by the
3627 section name, which is a hack, but ought to work. */
3630 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3631 Elf_Internal_Shdr
*hdr
,
3636 name
= bfd_get_section_name (abfd
, sec
);
3638 /* This is an ugly, but unfortunately necessary hack that is
3639 needed when producing EFI binaries on x86. It tells
3640 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3641 containing ELF relocation info. We need this hack in order to
3642 be able to generate ELF binaries that can be translated into
3643 EFI applications (which are essentially COFF objects). Those
3644 files contain a COFF ".reloc" section inside an ELFNN object,
3645 which would normally cause BFD to segfault because it would
3646 attempt to interpret this section as containing relocation
3647 entries for section "oc". With this hack enabled, ".reloc"
3648 will be treated as a normal data section, which will avoid the
3649 segfault. However, you won't be able to create an ELFNN binary
3650 with a section named "oc" that needs relocations, but that's
3651 the kind of ugly side-effects you get when detecting section
3652 types based on their names... In practice, this limitation is
3653 unlikely to bite. */
3654 if (strcmp (name
, ".reloc") == 0)
3655 hdr
->sh_type
= SHT_PROGBITS
;
3660 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3661 executables. Rather than setting it to the beginning of the TLS
3662 section, we have to set it to the end. This function may be called
3663 multiple times, it is idempotent. */
3666 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3668 struct elf_i386_link_hash_table
*htab
;
3669 struct bfd_link_hash_entry
*base
;
3671 if (!bfd_link_executable (info
))
3674 htab
= elf_i386_hash_table (info
);
3678 base
= htab
->tls_module_base
;
3682 base
->u
.def
.value
= htab
->elf
.tls_size
;
3685 /* Return the base VMA address which should be subtracted from real addresses
3686 when resolving @dtpoff relocation.
3687 This is PT_TLS segment p_vaddr. */
3690 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3692 /* If tls_sec is NULL, we should have signalled an error already. */
3693 if (elf_hash_table (info
)->tls_sec
== NULL
)
3695 return elf_hash_table (info
)->tls_sec
->vma
;
3698 /* Return the relocation value for @tpoff relocation
3699 if STT_TLS virtual address is ADDRESS. */
3702 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3704 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3705 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3706 bfd_vma static_tls_size
;
3708 /* If tls_sec is NULL, we should have signalled an error already. */
3709 if (htab
->tls_sec
== NULL
)
3712 /* Consider special static TLS alignment requirements. */
3713 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3714 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3717 /* Relocate an i386 ELF section. */
3720 elf_i386_relocate_section (bfd
*output_bfd
,
3721 struct bfd_link_info
*info
,
3723 asection
*input_section
,
3725 Elf_Internal_Rela
*relocs
,
3726 Elf_Internal_Sym
*local_syms
,
3727 asection
**local_sections
)
3729 struct elf_i386_link_hash_table
*htab
;
3730 Elf_Internal_Shdr
*symtab_hdr
;
3731 struct elf_link_hash_entry
**sym_hashes
;
3732 bfd_vma
*local_got_offsets
;
3733 bfd_vma
*local_tlsdesc_gotents
;
3734 Elf_Internal_Rela
*rel
;
3735 Elf_Internal_Rela
*wrel
;
3736 Elf_Internal_Rela
*relend
;
3737 bfd_boolean is_vxworks_tls
;
3738 unsigned plt_entry_size
;
3740 BFD_ASSERT (is_i386_elf (input_bfd
));
3742 htab
= elf_i386_hash_table (info
);
3745 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3746 sym_hashes
= elf_sym_hashes (input_bfd
);
3747 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3748 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3749 /* We have to handle relocations in vxworks .tls_vars sections
3750 specially, because the dynamic loader is 'weird'. */
3751 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3752 && bfd_link_pic (info
)
3753 && !strcmp (input_section
->output_section
->name
,
3756 elf_i386_set_tls_module_base (info
);
3758 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3760 rel
= wrel
= relocs
;
3761 relend
= relocs
+ input_section
->reloc_count
;
3762 for (; rel
< relend
; wrel
++, rel
++)
3764 unsigned int r_type
;
3765 reloc_howto_type
*howto
;
3766 unsigned long r_symndx
;
3767 struct elf_link_hash_entry
*h
;
3768 struct elf_i386_link_hash_entry
*eh
;
3769 Elf_Internal_Sym
*sym
;
3771 bfd_vma off
, offplt
, plt_offset
;
3773 bfd_boolean unresolved_reloc
;
3774 bfd_reloc_status_type r
;
3778 asection
*resolved_plt
;
3779 bfd_boolean resolved_to_zero
;
3781 r_type
= ELF32_R_TYPE (rel
->r_info
);
3782 if (r_type
== R_386_GNU_VTINHERIT
3783 || r_type
== R_386_GNU_VTENTRY
)
3790 if ((indx
= r_type
) >= R_386_standard
3791 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3792 >= R_386_ext
- R_386_standard
)
3793 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3794 >= R_386_ext2
- R_386_ext
))
3796 (*_bfd_error_handler
)
3797 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3798 input_bfd
, input_section
, r_type
);
3799 bfd_set_error (bfd_error_bad_value
);
3802 howto
= elf_howto_table
+ indx
;
3804 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3808 unresolved_reloc
= FALSE
;
3809 if (r_symndx
< symtab_hdr
->sh_info
)
3811 sym
= local_syms
+ r_symndx
;
3812 sec
= local_sections
[r_symndx
];
3813 relocation
= (sec
->output_section
->vma
3814 + sec
->output_offset
3816 st_size
= sym
->st_size
;
3818 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3819 && ((sec
->flags
& SEC_MERGE
) != 0
3820 || (bfd_link_relocatable (info
)
3821 && sec
->output_offset
!= 0)))
3824 bfd_byte
*where
= contents
+ rel
->r_offset
;
3826 switch (howto
->size
)
3829 addend
= bfd_get_8 (input_bfd
, where
);
3830 if (howto
->pc_relative
)
3832 addend
= (addend
^ 0x80) - 0x80;
3837 addend
= bfd_get_16 (input_bfd
, where
);
3838 if (howto
->pc_relative
)
3840 addend
= (addend
^ 0x8000) - 0x8000;
3845 addend
= bfd_get_32 (input_bfd
, where
);
3846 if (howto
->pc_relative
)
3848 addend
= (addend
^ 0x80000000) - 0x80000000;
3856 if (bfd_link_relocatable (info
))
3857 addend
+= sec
->output_offset
;
3860 asection
*msec
= sec
;
3861 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3863 addend
-= relocation
;
3864 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3867 switch (howto
->size
)
3870 /* FIXME: overflow checks. */
3871 if (howto
->pc_relative
)
3873 bfd_put_8 (input_bfd
, addend
, where
);
3876 if (howto
->pc_relative
)
3878 bfd_put_16 (input_bfd
, addend
, where
);
3881 if (howto
->pc_relative
)
3883 bfd_put_32 (input_bfd
, addend
, where
);
3887 else if (!bfd_link_relocatable (info
)
3888 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3890 /* Relocate against local STT_GNU_IFUNC symbol. */
3891 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3896 /* Set STT_GNU_IFUNC symbol value. */
3897 h
->root
.u
.def
.value
= sym
->st_value
;
3898 h
->root
.u
.def
.section
= sec
;
3903 bfd_boolean warned ATTRIBUTE_UNUSED
;
3904 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3906 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3907 r_symndx
, symtab_hdr
, sym_hashes
,
3909 unresolved_reloc
, warned
, ignored
);
3913 if (sec
!= NULL
&& discarded_section (sec
))
3915 _bfd_clear_contents (howto
, input_bfd
, input_section
,
3916 contents
+ rel
->r_offset
);
3917 wrel
->r_offset
= rel
->r_offset
;
3921 /* For ld -r, remove relocations in debug sections against
3922 sections defined in discarded sections. Not done for
3923 eh_frame editing code expects to be present. */
3924 if (bfd_link_relocatable (info
)
3925 && (input_section
->flags
& SEC_DEBUGGING
))
3931 if (bfd_link_relocatable (info
))
3938 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3939 it here if it is defined in a non-shared object. */
3941 && h
->type
== STT_GNU_IFUNC
3944 asection
*plt
, *gotplt
, *base_got
;
3948 if ((input_section
->flags
& SEC_ALLOC
) == 0)
3950 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3951 sections because such sections are not SEC_ALLOC and
3952 thus ld.so will not process them. */
3953 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
3957 else if (h
->plt
.offset
== (bfd_vma
) -1)
3960 /* STT_GNU_IFUNC symbol must go through PLT. */
3961 if (htab
->elf
.splt
!= NULL
)
3963 plt
= htab
->elf
.splt
;
3964 gotplt
= htab
->elf
.sgotplt
;
3968 plt
= htab
->elf
.iplt
;
3969 gotplt
= htab
->elf
.igotplt
;
3972 relocation
= (plt
->output_section
->vma
3973 + plt
->output_offset
+ h
->plt
.offset
);
3978 if (h
->root
.root
.string
)
3979 name
= h
->root
.root
.string
;
3981 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3983 (*_bfd_error_handler
)
3984 (_("%B: relocation %s against STT_GNU_IFUNC "
3985 "symbol `%s' isn't handled by %s"), input_bfd
,
3986 elf_howto_table
[r_type
].name
,
3987 name
, __FUNCTION__
);
3988 bfd_set_error (bfd_error_bad_value
);
3992 /* Generate dynamic relcoation only when there is a
3993 non-GOT reference in a shared object. */
3994 if (bfd_link_pic (info
) && h
->non_got_ref
)
3996 Elf_Internal_Rela outrel
;
4000 /* Need a dynamic relocation to get the real function
4002 offset
= _bfd_elf_section_offset (output_bfd
,
4006 if (offset
== (bfd_vma
) -1
4007 || offset
== (bfd_vma
) -2)
4010 outrel
.r_offset
= (input_section
->output_section
->vma
4011 + input_section
->output_offset
4014 if (h
->dynindx
== -1
4016 || bfd_link_executable (info
))
4018 /* This symbol is resolved locally. */
4019 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4020 bfd_put_32 (output_bfd
,
4021 (h
->root
.u
.def
.value
4022 + h
->root
.u
.def
.section
->output_section
->vma
4023 + h
->root
.u
.def
.section
->output_offset
),
4027 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4029 sreloc
= htab
->elf
.irelifunc
;
4030 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4032 /* If this reloc is against an external symbol, we
4033 do not want to fiddle with the addend. Otherwise,
4034 we need to include the symbol value so that it
4035 becomes an addend for the dynamic reloc. For an
4036 internal symbol, we have updated addend. */
4046 base_got
= htab
->elf
.sgot
;
4047 off
= h
->got
.offset
;
4049 if (base_got
== NULL
)
4052 if (off
== (bfd_vma
) -1)
4054 /* We can't use h->got.offset here to save state, or
4055 even just remember the offset, as finish_dynamic_symbol
4056 would use that as offset into .got. */
4058 if (htab
->elf
.splt
!= NULL
)
4060 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
4061 off
= (plt_index
+ 3) * 4;
4062 base_got
= htab
->elf
.sgotplt
;
4066 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4067 off
= plt_index
* 4;
4068 base_got
= htab
->elf
.igotplt
;
4071 if (h
->dynindx
== -1
4075 /* This references the local defitionion. We must
4076 initialize this entry in the global offset table.
4077 Since the offset must always be a multiple of 8,
4078 we use the least significant bit to record
4079 whether we have initialized it already.
4081 When doing a dynamic link, we create a .rela.got
4082 relocation entry to initialize the value. This
4083 is done in the finish_dynamic_symbol routine. */
4088 bfd_put_32 (output_bfd
, relocation
,
4089 base_got
->contents
+ off
);
4096 /* Adjust for static executables. */
4097 if (htab
->elf
.splt
== NULL
)
4098 relocation
+= gotplt
->output_offset
;
4102 relocation
= (base_got
->output_section
->vma
4103 + base_got
->output_offset
+ off
4104 - gotplt
->output_section
->vma
4105 - gotplt
->output_offset
);
4106 /* Adjust for static executables. */
4107 if (htab
->elf
.splt
== NULL
)
4108 relocation
+= gotplt
->output_offset
;
4114 relocation
-= (gotplt
->output_section
->vma
4115 + gotplt
->output_offset
);
4120 eh
= (struct elf_i386_link_hash_entry
*) h
;
4121 resolved_to_zero
= (eh
!= NULL
4122 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
));
4127 /* Avoid optimizing _DYNAMIC since ld.so may use its
4128 link-time address. */
4129 if (h
== htab
->elf
.hdynamic
)
4132 if (bfd_link_pic (info
))
4134 /* It is OK to convert mov to lea and convert indirect
4135 branch to direct branch. It is OK to convert adc,
4136 add, and, cmp, or, sbb, sub, test, xor only when PIC
4138 unsigned int opcode
, addend
;
4139 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4142 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4143 if (opcode
!= 0x8b && opcode
!= 0xff)
4147 /* Resolve "mov GOT[(%reg)], %reg",
4148 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4149 and "binop foo@GOT[(%reg)], %reg". */
4151 || (h
->plt
.offset
== (bfd_vma
) -1
4152 && h
->got
.offset
== (bfd_vma
) -1)
4153 || htab
->elf
.sgotplt
== NULL
)
4156 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4157 + htab
->elf
.sgotplt
->output_offset
);
4159 /* It is relative to .got.plt section. */
4160 if (h
->got
.offset
!= (bfd_vma
) -1)
4161 /* Use GOT entry. Mask off the least significant bit in
4162 GOT offset which may be set by R_386_GOT32 processing
4164 relocation
= (htab
->elf
.sgot
->output_section
->vma
4165 + htab
->elf
.sgot
->output_offset
4166 + (h
->got
.offset
& ~1) - offplt
);
4168 /* Use GOTPLT entry. */
4169 relocation
= (h
->plt
.offset
/ plt_entry_size
- 1 + 3) * 4;
4171 if (!bfd_link_pic (info
))
4173 /* If not PIC, add the .got.plt section address for
4174 baseless addressing. */
4176 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4177 if ((modrm
& 0xc7) == 0x5)
4178 relocation
+= offplt
;
4181 unresolved_reloc
= FALSE
;
4186 /* Relocation is to the entry for this symbol in the global
4188 if (htab
->elf
.sgot
== NULL
)
4195 off
= h
->got
.offset
;
4196 dyn
= htab
->elf
.dynamic_sections_created
;
4197 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4198 bfd_link_pic (info
),
4200 || (bfd_link_pic (info
)
4201 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4202 || (ELF_ST_VISIBILITY (h
->other
)
4203 && h
->root
.type
== bfd_link_hash_undefweak
))
4205 /* This is actually a static link, or it is a
4206 -Bsymbolic link and the symbol is defined
4207 locally, or the symbol was forced to be local
4208 because of a version file. We must initialize
4209 this entry in the global offset table. Since the
4210 offset must always be a multiple of 4, we use the
4211 least significant bit to record whether we have
4212 initialized it already.
4214 When doing a dynamic link, we create a .rel.got
4215 relocation entry to initialize the value. This
4216 is done in the finish_dynamic_symbol routine. */
4221 bfd_put_32 (output_bfd
, relocation
,
4222 htab
->elf
.sgot
->contents
+ off
);
4227 unresolved_reloc
= FALSE
;
4231 if (local_got_offsets
== NULL
)
4234 off
= local_got_offsets
[r_symndx
];
4236 /* The offset must always be a multiple of 4. We use
4237 the least significant bit to record whether we have
4238 already generated the necessary reloc. */
4243 bfd_put_32 (output_bfd
, relocation
,
4244 htab
->elf
.sgot
->contents
+ off
);
4246 if (bfd_link_pic (info
))
4249 Elf_Internal_Rela outrel
;
4251 s
= htab
->elf
.srelgot
;
4255 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4256 + htab
->elf
.sgot
->output_offset
4258 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4259 elf_append_rel (output_bfd
, s
, &outrel
);
4262 local_got_offsets
[r_symndx
] |= 1;
4266 if (off
>= (bfd_vma
) -2)
4269 relocation
= htab
->elf
.sgot
->output_section
->vma
4270 + htab
->elf
.sgot
->output_offset
+ off
4271 - htab
->elf
.sgotplt
->output_section
->vma
4272 - htab
->elf
.sgotplt
->output_offset
;
4276 /* Relocation is relative to the start of the global offset
4279 /* Check to make sure it isn't a protected function or data
4280 symbol for shared library since it may not be local when
4281 used as function address or with copy relocation. We also
4282 need to make sure that a symbol is referenced locally. */
4283 if (!bfd_link_executable (info
) && h
)
4285 if (!h
->def_regular
)
4289 switch (ELF_ST_VISIBILITY (h
->other
))
4292 v
= _("hidden symbol");
4295 v
= _("internal symbol");
4298 v
= _("protected symbol");
4305 (*_bfd_error_handler
)
4306 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4307 input_bfd
, v
, h
->root
.root
.string
);
4308 bfd_set_error (bfd_error_bad_value
);
4311 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4312 && (h
->type
== STT_FUNC
4313 || h
->type
== STT_OBJECT
)
4314 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4316 (*_bfd_error_handler
)
4317 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4319 h
->type
== STT_FUNC
? "function" : "data",
4320 h
->root
.root
.string
);
4321 bfd_set_error (bfd_error_bad_value
);
4326 /* Note that sgot is not involved in this
4327 calculation. We always want the start of .got.plt. If we
4328 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4329 permitted by the ABI, we might have to change this
4331 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4332 + htab
->elf
.sgotplt
->output_offset
;
4336 /* Use global offset table as symbol value. */
4337 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4338 + htab
->elf
.sgotplt
->output_offset
;
4339 unresolved_reloc
= FALSE
;
4343 /* Relocation is to the entry for this symbol in the
4344 procedure linkage table. */
4346 /* Resolve a PLT32 reloc against a local symbol directly,
4347 without using the procedure linkage table. */
4351 if ((h
->plt
.offset
== (bfd_vma
) -1
4352 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4353 || htab
->elf
.splt
== NULL
)
4355 /* We didn't make a PLT entry for this symbol. This
4356 happens when statically linking PIC code, or when
4357 using -Bsymbolic. */
4361 if (h
->plt
.offset
!= (bfd_vma
) -1)
4363 resolved_plt
= htab
->elf
.splt
;
4364 plt_offset
= h
->plt
.offset
;
4368 resolved_plt
= htab
->plt_got
;
4369 plt_offset
= eh
->plt_got
.offset
;
4372 relocation
= (resolved_plt
->output_section
->vma
4373 + resolved_plt
->output_offset
4375 unresolved_reloc
= FALSE
;
4379 /* Set to symbol size. */
4380 relocation
= st_size
;
4385 if ((input_section
->flags
& SEC_ALLOC
) == 0
4389 /* Copy dynamic function pointer relocations. Don't generate
4390 dynamic relocations against resolved undefined weak symbols
4391 in PIE, except for R_386_PC32. */
4392 if ((bfd_link_pic (info
)
4394 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4395 && (!resolved_to_zero
4396 || r_type
== R_386_PC32
))
4397 || h
->root
.type
!= bfd_link_hash_undefweak
))
4398 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4399 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4400 || (ELIMINATE_COPY_RELOCS
4401 && !bfd_link_pic (info
)
4405 || eh
->func_pointer_refcount
> 0
4406 || (h
->root
.type
== bfd_link_hash_undefweak
4407 && !resolved_to_zero
))
4408 && ((h
->def_dynamic
&& !h
->def_regular
)
4409 /* Undefined weak symbol is bound locally when
4411 || h
->root
.type
== bfd_link_hash_undefweak
)))
4413 Elf_Internal_Rela outrel
;
4414 bfd_boolean skip
, relocate
;
4417 /* When generating a shared object, these relocations
4418 are copied into the output file to be resolved at run
4425 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4427 if (outrel
.r_offset
== (bfd_vma
) -1)
4429 else if (outrel
.r_offset
== (bfd_vma
) -2)
4430 skip
= TRUE
, relocate
= TRUE
;
4431 outrel
.r_offset
+= (input_section
->output_section
->vma
4432 + input_section
->output_offset
);
4435 memset (&outrel
, 0, sizeof outrel
);
4438 && (r_type
== R_386_PC32
4439 || !(bfd_link_executable (info
)
4440 || SYMBOLIC_BIND (info
, h
))
4441 || !h
->def_regular
))
4442 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4445 /* This symbol is local, or marked to become local. */
4447 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4450 sreloc
= elf_section_data (input_section
)->sreloc
;
4452 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4454 r
= bfd_reloc_notsupported
;
4455 goto check_relocation_error
;
4458 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4460 /* If this reloc is against an external symbol, we do
4461 not want to fiddle with the addend. Otherwise, we
4462 need to include the symbol value so that it becomes
4463 an addend for the dynamic reloc. */
4470 if (!bfd_link_executable (info
))
4472 Elf_Internal_Rela outrel
;
4475 outrel
.r_offset
= rel
->r_offset
4476 + input_section
->output_section
->vma
4477 + input_section
->output_offset
;
4478 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4479 sreloc
= elf_section_data (input_section
)->sreloc
;
4482 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4487 case R_386_TLS_GOTDESC
:
4488 case R_386_TLS_DESC_CALL
:
4489 case R_386_TLS_IE_32
:
4490 case R_386_TLS_GOTIE
:
4491 tls_type
= GOT_UNKNOWN
;
4492 if (h
== NULL
&& local_got_offsets
)
4493 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4495 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4496 if (tls_type
== GOT_TLS_IE
)
4497 tls_type
= GOT_TLS_IE_NEG
;
4499 if (! elf_i386_tls_transition (info
, input_bfd
,
4500 input_section
, contents
,
4501 symtab_hdr
, sym_hashes
,
4502 &r_type
, tls_type
, rel
,
4503 relend
, h
, r_symndx
))
4506 if (r_type
== R_386_TLS_LE_32
)
4508 BFD_ASSERT (! unresolved_reloc
);
4509 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4514 /* GD->LE transition. */
4515 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4518 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4520 movl %gs:0, %eax; subl $foo@tpoff, %eax
4521 (6 byte form of subl). */
4522 memcpy (contents
+ rel
->r_offset
- 3,
4523 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4524 roff
= rel
->r_offset
+ 5;
4528 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4530 movl %gs:0, %eax; subl $foo@tpoff, %eax
4531 (6 byte form of subl). */
4532 memcpy (contents
+ rel
->r_offset
- 2,
4533 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4534 roff
= rel
->r_offset
+ 6;
4536 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4538 /* Skip R_386_PC32/R_386_PLT32. */
4543 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4545 /* GDesc -> LE transition.
4546 It's originally something like:
4547 leal x@tlsdesc(%ebx), %eax
4551 Registers other than %eax may be set up here. */
4556 roff
= rel
->r_offset
;
4557 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4559 /* Now modify the instruction as appropriate. */
4560 /* aoliva FIXME: remove the above and xor the byte
4562 bfd_put_8 (output_bfd
, val
^ 0x86,
4563 contents
+ roff
- 1);
4564 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4568 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4570 /* GDesc -> LE transition.
4578 roff
= rel
->r_offset
;
4579 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4580 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4583 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4587 /* IE->LE transition:
4588 Originally it can be one of:
4596 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4599 /* movl foo, %eax. */
4600 bfd_put_8 (output_bfd
, 0xb8,
4601 contents
+ rel
->r_offset
- 1);
4607 type
= bfd_get_8 (input_bfd
,
4608 contents
+ rel
->r_offset
- 2);
4613 bfd_put_8 (output_bfd
, 0xc7,
4614 contents
+ rel
->r_offset
- 2);
4615 bfd_put_8 (output_bfd
,
4616 0xc0 | ((val
>> 3) & 7),
4617 contents
+ rel
->r_offset
- 1);
4621 bfd_put_8 (output_bfd
, 0x81,
4622 contents
+ rel
->r_offset
- 2);
4623 bfd_put_8 (output_bfd
,
4624 0xc0 | ((val
>> 3) & 7),
4625 contents
+ rel
->r_offset
- 1);
4632 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4633 contents
+ rel
->r_offset
);
4638 unsigned int val
, type
;
4640 /* {IE_32,GOTIE}->LE transition:
4641 Originally it can be one of:
4642 subl foo(%reg1), %reg2
4643 movl foo(%reg1), %reg2
4644 addl foo(%reg1), %reg2
4647 movl $foo, %reg2 (6 byte form)
4648 addl $foo, %reg2. */
4649 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4650 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4654 bfd_put_8 (output_bfd
, 0xc7,
4655 contents
+ rel
->r_offset
- 2);
4656 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4657 contents
+ rel
->r_offset
- 1);
4659 else if (type
== 0x2b)
4662 bfd_put_8 (output_bfd
, 0x81,
4663 contents
+ rel
->r_offset
- 2);
4664 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4665 contents
+ rel
->r_offset
- 1);
4667 else if (type
== 0x03)
4670 bfd_put_8 (output_bfd
, 0x81,
4671 contents
+ rel
->r_offset
- 2);
4672 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4673 contents
+ rel
->r_offset
- 1);
4677 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4678 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4679 contents
+ rel
->r_offset
);
4681 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4682 contents
+ rel
->r_offset
);
4687 if (htab
->elf
.sgot
== NULL
)
4692 off
= h
->got
.offset
;
4693 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4697 if (local_got_offsets
== NULL
)
4700 off
= local_got_offsets
[r_symndx
];
4701 offplt
= local_tlsdesc_gotents
[r_symndx
];
4708 Elf_Internal_Rela outrel
;
4712 if (htab
->elf
.srelgot
== NULL
)
4715 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4717 if (GOT_TLS_GDESC_P (tls_type
))
4720 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4721 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4722 <= htab
->elf
.sgotplt
->size
);
4723 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4724 + htab
->elf
.sgotplt
->output_offset
4726 + htab
->sgotplt_jump_table_size
);
4727 sreloc
= htab
->elf
.srelplt
;
4728 loc
= sreloc
->contents
;
4729 loc
+= (htab
->next_tls_desc_index
++
4730 * sizeof (Elf32_External_Rel
));
4731 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4732 <= sreloc
->contents
+ sreloc
->size
);
4733 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4736 BFD_ASSERT (! unresolved_reloc
);
4737 bfd_put_32 (output_bfd
,
4738 relocation
- elf_i386_dtpoff_base (info
),
4739 htab
->elf
.sgotplt
->contents
+ offplt
4740 + htab
->sgotplt_jump_table_size
+ 4);
4744 bfd_put_32 (output_bfd
, 0,
4745 htab
->elf
.sgotplt
->contents
+ offplt
4746 + htab
->sgotplt_jump_table_size
+ 4);
4750 sreloc
= htab
->elf
.srelgot
;
4752 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4753 + htab
->elf
.sgot
->output_offset
+ off
);
4755 if (GOT_TLS_GD_P (tls_type
))
4756 dr_type
= R_386_TLS_DTPMOD32
;
4757 else if (GOT_TLS_GDESC_P (tls_type
))
4759 else if (tls_type
== GOT_TLS_IE_POS
)
4760 dr_type
= R_386_TLS_TPOFF
;
4762 dr_type
= R_386_TLS_TPOFF32
;
4764 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4765 bfd_put_32 (output_bfd
,
4766 relocation
- elf_i386_dtpoff_base (info
),
4767 htab
->elf
.sgot
->contents
+ off
);
4768 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4769 bfd_put_32 (output_bfd
,
4770 elf_i386_dtpoff_base (info
) - relocation
,
4771 htab
->elf
.sgot
->contents
+ off
);
4772 else if (dr_type
!= R_386_TLS_DESC
)
4773 bfd_put_32 (output_bfd
, 0,
4774 htab
->elf
.sgot
->contents
+ off
);
4775 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4777 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4779 if (GOT_TLS_GD_P (tls_type
))
4783 BFD_ASSERT (! unresolved_reloc
);
4784 bfd_put_32 (output_bfd
,
4785 relocation
- elf_i386_dtpoff_base (info
),
4786 htab
->elf
.sgot
->contents
+ off
+ 4);
4790 bfd_put_32 (output_bfd
, 0,
4791 htab
->elf
.sgot
->contents
+ off
+ 4);
4792 outrel
.r_info
= ELF32_R_INFO (indx
,
4793 R_386_TLS_DTPOFF32
);
4794 outrel
.r_offset
+= 4;
4795 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4798 else if (tls_type
== GOT_TLS_IE_BOTH
)
4800 bfd_put_32 (output_bfd
,
4802 ? relocation
- elf_i386_dtpoff_base (info
)
4804 htab
->elf
.sgot
->contents
+ off
+ 4);
4805 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4806 outrel
.r_offset
+= 4;
4807 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4814 local_got_offsets
[r_symndx
] |= 1;
4817 if (off
>= (bfd_vma
) -2
4818 && ! GOT_TLS_GDESC_P (tls_type
))
4820 if (r_type
== R_386_TLS_GOTDESC
4821 || r_type
== R_386_TLS_DESC_CALL
)
4823 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4824 unresolved_reloc
= FALSE
;
4826 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4828 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4829 + htab
->elf
.sgotplt
->output_offset
;
4830 relocation
= htab
->elf
.sgot
->output_section
->vma
4831 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4832 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4833 && tls_type
== GOT_TLS_IE_BOTH
)
4835 if (r_type
== R_386_TLS_IE
)
4836 relocation
+= g_o_t
;
4837 unresolved_reloc
= FALSE
;
4839 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4841 unsigned int val
, type
;
4844 /* GD->IE transition. */
4845 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4846 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4849 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4851 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4853 roff
= rel
->r_offset
- 3;
4857 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4859 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4860 roff
= rel
->r_offset
- 2;
4862 memcpy (contents
+ roff
,
4863 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4864 contents
[roff
+ 7] = 0x80 | (val
& 7);
4865 /* If foo is used only with foo@gotntpoff(%reg) and
4866 foo@indntpoff, but not with foo@gottpoff(%reg), change
4867 subl $foo@gottpoff(%reg), %eax
4869 addl $foo@gotntpoff(%reg), %eax. */
4870 if (tls_type
== GOT_TLS_IE_POS
)
4871 contents
[roff
+ 6] = 0x03;
4872 bfd_put_32 (output_bfd
,
4873 htab
->elf
.sgot
->output_section
->vma
4874 + htab
->elf
.sgot
->output_offset
+ off
4875 - htab
->elf
.sgotplt
->output_section
->vma
4876 - htab
->elf
.sgotplt
->output_offset
,
4877 contents
+ roff
+ 8);
4878 /* Skip R_386_PLT32. */
4883 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4885 /* GDesc -> IE transition.
4886 It's originally something like:
4887 leal x@tlsdesc(%ebx), %eax
4890 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4892 movl x@gottpoff(%ebx), %eax # before negl %eax
4894 Registers other than %eax may be set up here. */
4898 /* First, make sure it's a leal adding ebx to a 32-bit
4899 offset into any register, although it's probably
4900 almost always going to be eax. */
4901 roff
= rel
->r_offset
;
4903 /* Now modify the instruction as appropriate. */
4904 /* To turn a leal into a movl in the form we use it, it
4905 suffices to change the first byte from 0x8d to 0x8b.
4906 aoliva FIXME: should we decide to keep the leal, all
4907 we have to do is remove the statement below, and
4908 adjust the relaxation of R_386_TLS_DESC_CALL. */
4909 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4911 if (tls_type
== GOT_TLS_IE_BOTH
)
4914 bfd_put_32 (output_bfd
,
4915 htab
->elf
.sgot
->output_section
->vma
4916 + htab
->elf
.sgot
->output_offset
+ off
4917 - htab
->elf
.sgotplt
->output_section
->vma
4918 - htab
->elf
.sgotplt
->output_offset
,
4922 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4924 /* GDesc -> IE transition.
4932 depending on how we transformed the TLS_GOTDESC above.
4937 roff
= rel
->r_offset
;
4939 /* Now modify the instruction as appropriate. */
4940 if (tls_type
!= GOT_TLS_IE_NEG
)
4943 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4944 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4949 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4950 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4960 if (! elf_i386_tls_transition (info
, input_bfd
,
4961 input_section
, contents
,
4962 symtab_hdr
, sym_hashes
,
4963 &r_type
, GOT_UNKNOWN
, rel
,
4964 relend
, h
, r_symndx
))
4967 if (r_type
!= R_386_TLS_LDM
)
4969 /* LD->LE transition:
4970 leal foo(%reg), %eax; call ___tls_get_addr.
4972 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4973 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4974 memcpy (contents
+ rel
->r_offset
- 2,
4975 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4976 /* Skip R_386_PC32/R_386_PLT32. */
4982 if (htab
->elf
.sgot
== NULL
)
4985 off
= htab
->tls_ldm_got
.offset
;
4990 Elf_Internal_Rela outrel
;
4992 if (htab
->elf
.srelgot
== NULL
)
4995 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4996 + htab
->elf
.sgot
->output_offset
+ off
);
4998 bfd_put_32 (output_bfd
, 0,
4999 htab
->elf
.sgot
->contents
+ off
);
5000 bfd_put_32 (output_bfd
, 0,
5001 htab
->elf
.sgot
->contents
+ off
+ 4);
5002 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5003 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5004 htab
->tls_ldm_got
.offset
|= 1;
5006 relocation
= htab
->elf
.sgot
->output_section
->vma
5007 + htab
->elf
.sgot
->output_offset
+ off
5008 - htab
->elf
.sgotplt
->output_section
->vma
5009 - htab
->elf
.sgotplt
->output_offset
;
5010 unresolved_reloc
= FALSE
;
5013 case R_386_TLS_LDO_32
:
5014 if (!bfd_link_executable (info
)
5015 || (input_section
->flags
& SEC_CODE
) == 0)
5016 relocation
-= elf_i386_dtpoff_base (info
);
5018 /* When converting LDO to LE, we must negate. */
5019 relocation
= -elf_i386_tpoff (info
, relocation
);
5022 case R_386_TLS_LE_32
:
5024 if (!bfd_link_executable (info
))
5026 Elf_Internal_Rela outrel
;
5029 outrel
.r_offset
= rel
->r_offset
5030 + input_section
->output_section
->vma
5031 + input_section
->output_offset
;
5032 if (h
!= NULL
&& h
->dynindx
!= -1)
5036 if (r_type
== R_386_TLS_LE_32
)
5037 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5039 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5040 sreloc
= elf_section_data (input_section
)->sreloc
;
5043 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5046 else if (r_type
== R_386_TLS_LE_32
)
5047 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5049 relocation
-= elf_i386_dtpoff_base (info
);
5051 else if (r_type
== R_386_TLS_LE_32
)
5052 relocation
= elf_i386_tpoff (info
, relocation
);
5054 relocation
= -elf_i386_tpoff (info
, relocation
);
5061 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5062 because such sections are not SEC_ALLOC and thus ld.so will
5063 not process them. */
5064 if (unresolved_reloc
5065 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5067 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5068 rel
->r_offset
) != (bfd_vma
) -1)
5070 (*_bfd_error_handler
)
5071 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5074 (long) rel
->r_offset
,
5076 h
->root
.root
.string
);
5081 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5082 contents
, rel
->r_offset
,
5085 check_relocation_error
:
5086 if (r
!= bfd_reloc_ok
)
5091 name
= h
->root
.root
.string
;
5094 name
= bfd_elf_string_from_elf_section (input_bfd
,
5095 symtab_hdr
->sh_link
,
5100 name
= bfd_section_name (input_bfd
, sec
);
5103 if (r
== bfd_reloc_overflow
)
5105 if (! ((*info
->callbacks
->reloc_overflow
)
5106 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5107 (bfd_vma
) 0, input_bfd
, input_section
,
5113 (*_bfd_error_handler
)
5114 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5115 input_bfd
, input_section
,
5116 (long) rel
->r_offset
, name
, (int) r
);
5127 Elf_Internal_Shdr
*rel_hdr
;
5128 size_t deleted
= rel
- wrel
;
5130 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5131 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5132 if (rel_hdr
->sh_size
== 0)
5134 /* It is too late to remove an empty reloc section. Leave
5136 ??? What is wrong with an empty section??? */
5137 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5140 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5141 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5142 input_section
->reloc_count
-= deleted
;
5148 /* Finish up dynamic symbol handling. We set the contents of various
5149 dynamic sections here. */
5152 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5153 struct bfd_link_info
*info
,
5154 struct elf_link_hash_entry
*h
,
5155 Elf_Internal_Sym
*sym
)
5157 struct elf_i386_link_hash_table
*htab
;
5158 unsigned plt_entry_size
;
5159 const struct elf_i386_backend_data
*abed
;
5160 struct elf_i386_link_hash_entry
*eh
;
5161 bfd_boolean local_undefweak
;
5163 htab
= elf_i386_hash_table (info
);
5167 abed
= get_elf_i386_backend_data (output_bfd
);
5168 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
5170 eh
= (struct elf_i386_link_hash_entry
*) h
;
5172 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5173 resolved undefined weak symbols in executable so that their
5174 references have value 0 at run-time. */
5175 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
, eh
);
5177 if (h
->plt
.offset
!= (bfd_vma
) -1)
5181 Elf_Internal_Rela rel
;
5183 asection
*plt
, *gotplt
, *relplt
;
5185 /* When building a static executable, use .iplt, .igot.plt and
5186 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5187 if (htab
->elf
.splt
!= NULL
)
5189 plt
= htab
->elf
.splt
;
5190 gotplt
= htab
->elf
.sgotplt
;
5191 relplt
= htab
->elf
.srelplt
;
5195 plt
= htab
->elf
.iplt
;
5196 gotplt
= htab
->elf
.igotplt
;
5197 relplt
= htab
->elf
.irelplt
;
5200 /* This symbol has an entry in the procedure linkage table. Set
5203 if ((h
->dynindx
== -1
5205 && !((h
->forced_local
|| bfd_link_executable (info
))
5207 && h
->type
== STT_GNU_IFUNC
))
5213 /* Get the index in the procedure linkage table which
5214 corresponds to this symbol. This is the index of this symbol
5215 in all the symbols for which we are making plt entries. The
5216 first entry in the procedure linkage table is reserved.
5218 Get the offset into the .got table of the entry that
5219 corresponds to this function. Each .got entry is 4 bytes.
5220 The first three are reserved.
5222 For static executables, we don't reserve anything. */
5224 if (plt
== htab
->elf
.splt
)
5226 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
5227 got_offset
= (got_offset
+ 3) * 4;
5231 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5232 got_offset
= got_offset
* 4;
5235 /* Fill in the entry in the procedure linkage table. */
5236 if (! bfd_link_pic (info
))
5238 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
5239 abed
->plt
->plt_entry_size
);
5240 bfd_put_32 (output_bfd
,
5241 (gotplt
->output_section
->vma
5242 + gotplt
->output_offset
5244 plt
->contents
+ h
->plt
.offset
5245 + abed
->plt
->plt_got_offset
);
5247 if (abed
->is_vxworks
)
5249 int s
, k
, reloc_index
;
5251 /* Create the R_386_32 relocation referencing the GOT
5252 for this PLT entry. */
5254 /* S: Current slot number (zero-based). */
5255 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
5256 / abed
->plt
->plt_entry_size
);
5257 /* K: Number of relocations for PLTResolve. */
5258 if (bfd_link_pic (info
))
5259 k
= PLTRESOLVE_RELOCS_SHLIB
;
5261 k
= PLTRESOLVE_RELOCS
;
5262 /* Skip the PLTresolve relocations, and the relocations for
5263 the other PLT slots. */
5264 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5265 loc
= (htab
->srelplt2
->contents
+ reloc_index
5266 * sizeof (Elf32_External_Rel
));
5268 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5269 + htab
->elf
.splt
->output_offset
5270 + h
->plt
.offset
+ 2),
5271 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5272 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5274 /* Create the R_386_32 relocation referencing the beginning of
5275 the PLT for this GOT entry. */
5276 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5277 + htab
->elf
.sgotplt
->output_offset
5279 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5280 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5281 loc
+ sizeof (Elf32_External_Rel
));
5286 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
5287 abed
->plt
->plt_entry_size
);
5288 bfd_put_32 (output_bfd
, got_offset
,
5289 plt
->contents
+ h
->plt
.offset
5290 + abed
->plt
->plt_got_offset
);
5293 /* Fill in the entry in the global offset table. Leave the entry
5294 as zero for undefined weak symbol in PIE. No PLT relocation
5295 against undefined weak symbol in PIE. */
5296 if (!local_undefweak
)
5298 bfd_put_32 (output_bfd
,
5299 (plt
->output_section
->vma
5300 + plt
->output_offset
5302 + abed
->plt
->plt_lazy_offset
),
5303 gotplt
->contents
+ got_offset
);
5305 /* Fill in the entry in the .rel.plt section. */
5306 rel
.r_offset
= (gotplt
->output_section
->vma
5307 + gotplt
->output_offset
5309 if (h
->dynindx
== -1
5310 || ((bfd_link_executable (info
)
5311 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5313 && h
->type
== STT_GNU_IFUNC
))
5315 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5316 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5317 in the .got.plt section. */
5318 bfd_put_32 (output_bfd
,
5319 (h
->root
.u
.def
.value
5320 + h
->root
.u
.def
.section
->output_section
->vma
5321 + h
->root
.u
.def
.section
->output_offset
),
5322 gotplt
->contents
+ got_offset
);
5323 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5324 /* R_386_IRELATIVE comes last. */
5325 plt_index
= htab
->next_irelative_index
--;
5329 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5330 plt_index
= htab
->next_jump_slot_index
++;
5333 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5334 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5336 /* Don't fill PLT entry for static executables. */
5337 if (plt
== htab
->elf
.splt
)
5339 bfd_put_32 (output_bfd
,
5340 plt_index
* sizeof (Elf32_External_Rel
),
5341 plt
->contents
+ h
->plt
.offset
5342 + abed
->plt
->plt_reloc_offset
);
5343 bfd_put_32 (output_bfd
, - (h
->plt
.offset
5344 + abed
->plt
->plt_plt_offset
+ 4),
5345 plt
->contents
+ h
->plt
.offset
5346 + abed
->plt
->plt_plt_offset
);
5350 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5352 bfd_vma got_offset
, plt_offset
;
5353 asection
*plt
, *got
, *gotplt
;
5354 const bfd_byte
*got_plt_entry
;
5356 /* Offset of displacement of the indirect jump. */
5357 bfd_vma plt_got_offset
= 2;
5359 /* Set the entry in the GOT procedure linkage table. */
5360 plt
= htab
->plt_got
;
5361 got
= htab
->elf
.sgot
;
5362 gotplt
= htab
->elf
.sgotplt
;
5363 got_offset
= h
->got
.offset
;
5365 if (got_offset
== (bfd_vma
) -1
5371 /* Fill in the entry in the GOT procedure linkage table. */
5372 if (! bfd_link_pic (info
))
5374 got_plt_entry
= elf_i386_got_plt_entry
;
5375 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5379 got_plt_entry
= elf_i386_pic_got_plt_entry
;
5380 got_offset
+= (got
->output_section
->vma
5381 + got
->output_offset
5382 - gotplt
->output_section
->vma
5383 - gotplt
->output_offset
);
5386 plt_offset
= eh
->plt_got
.offset
;
5387 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5388 sizeof (elf_i386_got_plt_entry
));
5389 bfd_put_32 (output_bfd
, got_offset
,
5390 plt
->contents
+ plt_offset
+ plt_got_offset
);
5393 if (!local_undefweak
5395 && (h
->plt
.offset
!= (bfd_vma
) -1
5396 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5398 /* Mark the symbol as undefined, rather than as defined in
5399 the .plt section. Leave the value if there were any
5400 relocations where pointer equality matters (this is a clue
5401 for the dynamic linker, to make function pointer
5402 comparisons work between an application and shared
5403 library), otherwise set it to zero. If a function is only
5404 called from a binary, there is no need to slow down
5405 shared libraries because of that. */
5406 sym
->st_shndx
= SHN_UNDEF
;
5407 if (!h
->pointer_equality_needed
)
5411 /* Don't generate dynamic GOT relocation against undefined weak
5412 symbol in executable. */
5413 if (h
->got
.offset
!= (bfd_vma
) -1
5414 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5415 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5416 && !local_undefweak
)
5418 Elf_Internal_Rela rel
;
5420 /* This symbol has an entry in the global offset table. Set it
5423 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5426 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5427 + htab
->elf
.sgot
->output_offset
5428 + (h
->got
.offset
& ~(bfd_vma
) 1));
5430 /* If this is a static link, or it is a -Bsymbolic link and the
5431 symbol is defined locally or was forced to be local because
5432 of a version file, we just want to emit a RELATIVE reloc.
5433 The entry in the global offset table will already have been
5434 initialized in the relocate_section function. */
5436 && h
->type
== STT_GNU_IFUNC
)
5438 if (bfd_link_pic (info
))
5440 /* Generate R_386_GLOB_DAT. */
5447 if (!h
->pointer_equality_needed
)
5450 /* For non-shared object, we can't use .got.plt, which
5451 contains the real function addres if we need pointer
5452 equality. We load the GOT entry with the PLT entry. */
5453 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5454 bfd_put_32 (output_bfd
,
5455 (plt
->output_section
->vma
5456 + plt
->output_offset
+ h
->plt
.offset
),
5457 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5461 else if (bfd_link_pic (info
)
5462 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5464 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5465 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5469 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5471 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5472 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5473 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5476 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
5481 Elf_Internal_Rela rel
;
5483 /* This symbol needs a copy reloc. Set it up. */
5485 if (h
->dynindx
== -1
5486 || (h
->root
.type
!= bfd_link_hash_defined
5487 && h
->root
.type
!= bfd_link_hash_defweak
)
5488 || htab
->srelbss
== NULL
)
5491 rel
.r_offset
= (h
->root
.u
.def
.value
5492 + h
->root
.u
.def
.section
->output_section
->vma
5493 + h
->root
.u
.def
.section
->output_offset
);
5494 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5495 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
5501 /* Finish up local dynamic symbol handling. We set the contents of
5502 various dynamic sections here. */
5505 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5507 struct elf_link_hash_entry
*h
5508 = (struct elf_link_hash_entry
*) *slot
;
5509 struct bfd_link_info
*info
5510 = (struct bfd_link_info
*) inf
;
5512 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5516 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5517 here since undefined weak symbol may not be dynamic and may not be
5518 called for elf_i386_finish_dynamic_symbol. */
5521 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5524 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5525 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5527 if (h
->root
.type
!= bfd_link_hash_undefweak
5528 || h
->dynindx
!= -1)
5531 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5535 /* Used to decide how to sort relocs in an optimal manner for the
5536 dynamic linker, before writing them out. */
5538 static enum elf_reloc_type_class
5539 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5540 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5541 const Elf_Internal_Rela
*rela
)
5543 bfd
*abfd
= info
->output_bfd
;
5544 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5545 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5547 if (htab
->dynsym
!= NULL
5548 && htab
->dynsym
->contents
!= NULL
)
5550 /* Check relocation against STT_GNU_IFUNC symbol if there are
5552 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5553 Elf_Internal_Sym sym
;
5554 if (!bed
->s
->swap_symbol_in (abfd
,
5555 (htab
->dynsym
->contents
5556 + r_symndx
* sizeof (Elf32_External_Sym
)),
5560 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5561 return reloc_class_ifunc
;
5564 switch (ELF32_R_TYPE (rela
->r_info
))
5566 case R_386_RELATIVE
:
5567 return reloc_class_relative
;
5568 case R_386_JUMP_SLOT
:
5569 return reloc_class_plt
;
5571 return reloc_class_copy
;
5573 return reloc_class_normal
;
5577 /* Finish up the dynamic sections. */
5580 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5581 struct bfd_link_info
*info
)
5583 struct elf_i386_link_hash_table
*htab
;
5586 const struct elf_i386_backend_data
*abed
;
5588 htab
= elf_i386_hash_table (info
);
5592 dynobj
= htab
->elf
.dynobj
;
5593 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5594 abed
= get_elf_i386_backend_data (output_bfd
);
5596 if (htab
->elf
.dynamic_sections_created
)
5598 Elf32_External_Dyn
*dyncon
, *dynconend
;
5600 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5603 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5604 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5605 for (; dyncon
< dynconend
; dyncon
++)
5607 Elf_Internal_Dyn dyn
;
5610 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5615 if (abed
->is_vxworks
5616 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5621 s
= htab
->elf
.sgotplt
;
5622 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5626 s
= htab
->elf
.srelplt
;
5627 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5631 s
= htab
->elf
.srelplt
;
5632 dyn
.d_un
.d_val
= s
->size
;
5636 /* My reading of the SVR4 ABI indicates that the
5637 procedure linkage table relocs (DT_JMPREL) should be
5638 included in the overall relocs (DT_REL). This is
5639 what Solaris does. However, UnixWare can not handle
5640 that case. Therefore, we override the DT_RELSZ entry
5641 here to make it not include the JMPREL relocs. */
5642 s
= htab
->elf
.srelplt
;
5645 dyn
.d_un
.d_val
-= s
->size
;
5649 /* We may not be using the standard ELF linker script.
5650 If .rel.plt is the first .rel section, we adjust
5651 DT_REL to not include it. */
5652 s
= htab
->elf
.srelplt
;
5655 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
5657 dyn
.d_un
.d_ptr
+= s
->size
;
5661 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5664 /* Fill in the first entry in the procedure linkage table. */
5665 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5667 if (bfd_link_pic (info
))
5669 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
5670 abed
->plt
->plt0_entry_size
);
5671 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5672 abed
->plt0_pad_byte
,
5673 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5677 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
5678 abed
->plt
->plt0_entry_size
);
5679 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
5680 abed
->plt0_pad_byte
,
5681 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
5682 bfd_put_32 (output_bfd
,
5683 (htab
->elf
.sgotplt
->output_section
->vma
5684 + htab
->elf
.sgotplt
->output_offset
5686 htab
->elf
.splt
->contents
5687 + abed
->plt
->plt0_got1_offset
);
5688 bfd_put_32 (output_bfd
,
5689 (htab
->elf
.sgotplt
->output_section
->vma
5690 + htab
->elf
.sgotplt
->output_offset
5692 htab
->elf
.splt
->contents
5693 + abed
->plt
->plt0_got2_offset
);
5695 if (abed
->is_vxworks
)
5697 Elf_Internal_Rela rel
;
5699 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5700 On IA32 we use REL relocations so the addend goes in
5701 the PLT directly. */
5702 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5703 + htab
->elf
.splt
->output_offset
5704 + abed
->plt
->plt0_got1_offset
);
5705 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5706 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5707 htab
->srelplt2
->contents
);
5708 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5709 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
5710 + htab
->elf
.splt
->output_offset
5711 + abed
->plt
->plt0_got2_offset
);
5712 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5713 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5714 htab
->srelplt2
->contents
+
5715 sizeof (Elf32_External_Rel
));
5719 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5720 really seem like the right value. */
5721 elf_section_data (htab
->elf
.splt
->output_section
)
5722 ->this_hdr
.sh_entsize
= 4;
5724 /* Correct the .rel.plt.unloaded relocations. */
5725 if (abed
->is_vxworks
&& !bfd_link_pic (info
))
5727 int num_plts
= (htab
->elf
.splt
->size
5728 / abed
->plt
->plt_entry_size
) - 1;
5731 p
= htab
->srelplt2
->contents
;
5732 if (bfd_link_pic (info
))
5733 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
5735 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
5737 for (; num_plts
; num_plts
--)
5739 Elf_Internal_Rela rel
;
5740 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5741 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5742 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5743 p
+= sizeof (Elf32_External_Rel
);
5745 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
5746 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5747 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
5748 p
+= sizeof (Elf32_External_Rel
);
5754 if (htab
->elf
.sgotplt
)
5756 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
5758 (*_bfd_error_handler
)
5759 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
5763 /* Fill in the first three entries in the global offset table. */
5764 if (htab
->elf
.sgotplt
->size
> 0)
5766 bfd_put_32 (output_bfd
,
5768 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
5769 htab
->elf
.sgotplt
->contents
);
5770 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
5771 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
5774 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
5777 /* Adjust .eh_frame for .plt section. */
5778 if (htab
->plt_eh_frame
!= NULL
5779 && htab
->plt_eh_frame
->contents
!= NULL
)
5781 if (htab
->elf
.splt
!= NULL
5782 && htab
->elf
.splt
->size
!= 0
5783 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
5784 && htab
->elf
.splt
->output_section
!= NULL
5785 && htab
->plt_eh_frame
->output_section
!= NULL
)
5787 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
5788 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
5789 + htab
->plt_eh_frame
->output_offset
5790 + PLT_FDE_START_OFFSET
;
5791 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
5792 htab
->plt_eh_frame
->contents
5793 + PLT_FDE_START_OFFSET
);
5795 if (htab
->plt_eh_frame
->sec_info_type
5796 == SEC_INFO_TYPE_EH_FRAME
)
5798 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
5800 htab
->plt_eh_frame
->contents
))
5805 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5806 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5808 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5809 htab_traverse (htab
->loc_hash_table
,
5810 elf_i386_finish_local_dynamic_symbol
,
5813 /* Fill PLT entries for undefined weak symbols in PIE. */
5814 if (bfd_link_pie (info
))
5815 bfd_hash_traverse (&info
->hash
->table
,
5816 elf_i386_pie_finish_undefweak_symbol
,
5822 /* Return an array of PLT entry symbol values. */
5825 elf_i386_get_plt_sym_val (bfd
*abfd
, asymbol
**dynsyms
, asection
*plt
,
5828 bfd_boolean (*slurp_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
5831 bfd_vma
*plt_sym_val
;
5833 bfd_byte
*plt_contents
;
5834 const struct elf_i386_backend_data
*bed
5835 = get_elf_i386_backend_data (abfd
);
5836 Elf_Internal_Shdr
*hdr
;
5838 /* Get the .plt section contents. */
5839 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
5840 if (plt_contents
== NULL
)
5842 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
5843 plt_contents
, 0, plt
->size
))
5846 free (plt_contents
);
5850 slurp_relocs
= get_elf_backend_data (abfd
)->s
->slurp_reloc_table
;
5851 if (! (*slurp_relocs
) (abfd
, relplt
, dynsyms
, TRUE
))
5854 hdr
= &elf_section_data (relplt
)->this_hdr
;
5855 count
= relplt
->size
/ hdr
->sh_entsize
;
5857 plt_sym_val
= (bfd_vma
*) bfd_malloc (sizeof (bfd_vma
) * count
);
5858 if (plt_sym_val
== NULL
)
5861 for (i
= 0; i
< count
; i
++)
5862 plt_sym_val
[i
] = -1;
5864 plt_offset
= bed
->plt
->plt_entry_size
;
5865 p
= relplt
->relocation
;
5866 for (i
= 0; i
< count
; i
++, p
++)
5870 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5871 if (p
->howto
== NULL
)
5874 if (p
->howto
->type
!= R_386_JUMP_SLOT
5875 && p
->howto
->type
!= R_386_IRELATIVE
)
5878 reloc_index
= H_GET_32 (abfd
, (plt_contents
+ plt_offset
5879 + bed
->plt
->plt_reloc_offset
));
5880 reloc_index
/= sizeof (Elf32_External_Rel
);
5881 if (reloc_index
< count
)
5882 plt_sym_val
[reloc_index
] = plt
->vma
+ plt_offset
;
5884 plt_offset
+= bed
->plt
->plt_entry_size
;
5886 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5888 if (plt_offset
>= plt
->size
)
5892 free (plt_contents
);
5897 /* Similar to _bfd_elf_get_synthetic_symtab. */
5900 elf_i386_get_synthetic_symtab (bfd
*abfd
,
5907 asection
*plt
= bfd_get_section_by_name (abfd
, ".plt");
5908 return _bfd_elf_ifunc_get_synthetic_symtab (abfd
, symcount
, syms
,
5909 dynsymcount
, dynsyms
, ret
,
5911 elf_i386_get_plt_sym_val
);
5914 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5917 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5919 if (h
->plt
.offset
!= (bfd_vma
) -1
5921 && !h
->pointer_equality_needed
)
5924 return _bfd_elf_hash_symbol (h
);
5927 /* Hook called by the linker routine which adds symbols from an object
5931 elf_i386_add_symbol_hook (bfd
* abfd
,
5932 struct bfd_link_info
* info
,
5933 Elf_Internal_Sym
* sym
,
5934 const char ** namep ATTRIBUTE_UNUSED
,
5935 flagword
* flagsp ATTRIBUTE_UNUSED
,
5936 asection
** secp ATTRIBUTE_UNUSED
,
5937 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5939 if (ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
5940 && (abfd
->flags
& DYNAMIC
) == 0
5941 && bfd_get_flavour (info
->output_bfd
) == bfd_target_elf_flavour
)
5942 elf_tdata (info
->output_bfd
)->has_gnu_symbols
5943 |= elf_gnu_symbol_unique
;
5948 #define TARGET_LITTLE_SYM i386_elf32_vec
5949 #define TARGET_LITTLE_NAME "elf32-i386"
5950 #define ELF_ARCH bfd_arch_i386
5951 #define ELF_TARGET_ID I386_ELF_DATA
5952 #define ELF_MACHINE_CODE EM_386
5953 #define ELF_MAXPAGESIZE 0x1000
5955 #define elf_backend_can_gc_sections 1
5956 #define elf_backend_can_refcount 1
5957 #define elf_backend_want_got_plt 1
5958 #define elf_backend_plt_readonly 1
5959 #define elf_backend_want_plt_sym 0
5960 #define elf_backend_got_header_size 12
5961 #define elf_backend_plt_alignment 4
5962 #define elf_backend_extern_protected_data 1
5964 /* Support RELA for objdump of prelink objects. */
5965 #define elf_info_to_howto elf_i386_info_to_howto_rel
5966 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5968 #define bfd_elf32_mkobject elf_i386_mkobject
5970 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5971 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5972 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5973 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5974 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5976 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5977 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5978 #define elf_backend_check_relocs elf_i386_check_relocs
5979 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5980 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5981 #define elf_backend_fake_sections elf_i386_fake_sections
5982 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5983 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5984 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5985 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5986 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5987 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5988 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5989 #define elf_backend_relocate_section elf_i386_relocate_section
5990 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5991 #define elf_backend_always_size_sections elf_i386_always_size_sections
5992 #define elf_backend_omit_section_dynsym \
5993 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5994 #define elf_backend_hash_symbol elf_i386_hash_symbol
5995 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5996 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
5998 #include "elf32-target.h"
6000 /* FreeBSD support. */
6002 #undef TARGET_LITTLE_SYM
6003 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6004 #undef TARGET_LITTLE_NAME
6005 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6007 #define ELF_OSABI ELFOSABI_FREEBSD
6009 /* The kernel recognizes executables as valid only if they carry a
6010 "FreeBSD" label in the ELF header. So we put this label on all
6011 executables and (for simplicity) also all other object files. */
6014 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
6016 _bfd_elf_post_process_headers (abfd
, info
);
6018 #ifdef OLD_FREEBSD_ABI_LABEL
6020 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6021 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
6022 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
6027 #undef elf_backend_post_process_headers
6028 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6030 #define elf32_bed elf32_i386_fbsd_bed
6032 #undef elf_backend_add_symbol_hook
6034 #include "elf32-target.h"
6038 #undef TARGET_LITTLE_SYM
6039 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6040 #undef TARGET_LITTLE_NAME
6041 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6043 #undef elf_backend_post_process_headers
6045 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6046 objects won't be recognized. */
6050 #define elf32_bed elf32_i386_sol2_bed
6052 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6054 #undef elf_backend_static_tls_alignment
6055 #define elf_backend_static_tls_alignment 8
6057 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6059 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6061 #undef elf_backend_want_plt_sym
6062 #define elf_backend_want_plt_sym 1
6064 #undef elf_backend_strtab_flags
6065 #define elf_backend_strtab_flags SHF_STRINGS
6068 elf32_i386_set_special_info_link (const bfd
*ibfd ATTRIBUTE_UNUSED
,
6069 bfd
*obfd ATTRIBUTE_UNUSED
,
6070 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
6071 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
6073 /* PR 19938: FIXME: Need to add code for setting the sh_info
6074 and sh_link fields of Solaris specific section types.
6076 Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6077 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6079 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6081 The following values should be set:
6084 -----------------------------------------------------------------------------
6085 SHT_SUNW_ancillary The section header index of 0
6086 [0x6fffffee] the associated string table.
6088 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6089 [0x6ffffff0] the associated symbol table. section header index of
6091 SHT_SUNW_capchain table,
6094 SHT_SUNW_symsort The section header index of 0
6095 [0x6ffffff1] the associated symbol table.
6097 SHT_SUNW_tlssort The section header index of 0
6098 [0x6ffffff2] the associated symbol table.
6100 SHT_SUNW_LDYNSYM The section header index of One greater than the
6101 [0x6ffffff3] the associated string table. symbol table index of the
6102 This index is the same string last local symbol,
6103 table used by the SHT_DYNSYM STB_LOCAL. Since
6104 section. SHT_SUNW_LDYNSYM only
6105 contains local symbols,
6106 sh_info is equivalent to
6107 the number of symbols in
6110 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6111 [0x6ffffff5] the section header index of to named strings, the
6112 the associated section header index of
6113 SHT_SUNW_capinfo table, the associated string
6114 otherwise 0. table, otherwise 0.
6116 SHT_SUNW_move The section header index of 0
6117 [0x6ffffffa] the associated symbol table.
6122 SHT_SUNW_syminfo The section header index of The section header index
6123 [0x6ffffffc] the associated symbol table. of the associated
6126 SHT_SUNW_verdef The section header index of The number of version
6127 [0x6ffffffd] the associated string table. definitions within the
6130 SHT_SUNW_verneed The section header index of The number of version
6131 [0x6ffffffe] the associated string table. dependencies within the
6134 SHT_SUNW_versym The section header index of 0
6135 [0x6fffffff] the associated symbol table. */
6139 #undef elf_backend_set_special_section_info_and_link
6140 #define elf_backend_set_special_section_info_and_link elf32_i386_set_special_info_link
6142 #include "elf32-target.h"
6144 /* Intel MCU support. */
6147 elf32_iamcu_elf_object_p (bfd
*abfd
)
6149 /* Set the right machine number for an IAMCU elf32 file. */
6150 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
6154 #undef TARGET_LITTLE_SYM
6155 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6156 #undef TARGET_LITTLE_NAME
6157 #define TARGET_LITTLE_NAME "elf32-iamcu"
6159 #define ELF_ARCH bfd_arch_iamcu
6161 #undef ELF_MACHINE_CODE
6162 #define ELF_MACHINE_CODE EM_IAMCU
6167 #define elf32_bed elf32_iamcu_bed
6169 #undef elf_backend_object_p
6170 #define elf_backend_object_p elf32_iamcu_elf_object_p
6172 #undef elf_backend_static_tls_alignment
6174 #undef elf_backend_want_plt_sym
6175 #define elf_backend_want_plt_sym 0
6177 #undef elf_backend_strtab_flags
6178 #undef elf_backend_set_special_section_info_and_link
6180 #include "elf32-target.h"
6182 /* Restore defaults. */
6184 #define ELF_ARCH bfd_arch_i386
6185 #undef ELF_MACHINE_CODE
6186 #define ELF_MACHINE_CODE EM_386
6188 /* Native Client support. */
6190 #undef TARGET_LITTLE_SYM
6191 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6192 #undef TARGET_LITTLE_NAME
6193 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6195 #define elf32_bed elf32_i386_nacl_bed
6197 #undef ELF_MAXPAGESIZE
6198 #define ELF_MAXPAGESIZE 0x10000
6200 /* Restore defaults. */
6202 #undef elf_backend_want_plt_sym
6203 #define elf_backend_want_plt_sym 0
6204 #undef elf_backend_post_process_headers
6205 #undef elf_backend_static_tls_alignment
6207 /* NaCl uses substantially different PLT entries for the same effects. */
6209 #undef elf_backend_plt_alignment
6210 #define elf_backend_plt_alignment 5
6211 #define NACL_PLT_ENTRY_SIZE 64
6212 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6214 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
6216 0xff, 0x35, /* pushl contents of address */
6217 0, 0, 0, 0, /* replaced with address of .got + 4. */
6218 0x8b, 0x0d, /* movl contents of address, %ecx */
6219 0, 0, 0, 0, /* replaced with address of .got + 8. */
6220 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6221 0xff, 0xe1 /* jmp *%ecx */
6224 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6226 0x8b, 0x0d, /* movl contents of address, %ecx */
6227 0, 0, 0, 0, /* replaced with GOT slot address. */
6228 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
6229 0xff, 0xe1, /* jmp *%ecx */
6231 /* Pad to the next 32-byte boundary with nop instructions. */
6233 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6234 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6236 /* Lazy GOT entries point here (32-byte aligned). */
6237 0x68, /* pushl immediate */
6238 0, 0, 0, 0, /* replaced with reloc offset. */
6239 0xe9, /* jmp relative */
6240 0, 0, 0, 0, /* replaced with offset to .plt. */
6242 /* Pad to the next 32-byte boundary with nop instructions. */
6243 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6244 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6248 static const bfd_byte
6249 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
6251 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6252 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6253 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6254 0xff, 0xe1, /* jmp *%ecx */
6256 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6257 so pad to that size with nop instructions. */
6258 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6261 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
6263 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6264 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6265 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6266 0xff, 0xe1, /* jmp *%ecx */
6268 /* Pad to the next 32-byte boundary with nop instructions. */
6270 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6271 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6273 /* Lazy GOT entries point here (32-byte aligned). */
6274 0x68, /* pushl immediate */
6275 0, 0, 0, 0, /* replaced with offset into relocation table. */
6276 0xe9, /* jmp relative */
6277 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6279 /* Pad to the next 32-byte boundary with nop instructions. */
6280 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6281 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6285 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
6287 #if (PLT_CIE_LENGTH != 20 \
6288 || PLT_FDE_LENGTH != 36 \
6289 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6290 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6291 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6293 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
6294 0, 0, 0, 0, /* CIE ID */
6295 1, /* CIE version */
6296 'z', 'R', 0, /* Augmentation string */
6297 1, /* Code alignment factor */
6298 0x7c, /* Data alignment factor: -4 */
6299 8, /* Return address column */
6300 1, /* Augmentation size */
6301 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
6302 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6303 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6304 DW_CFA_nop
, DW_CFA_nop
,
6306 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
6307 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
6308 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6309 0, 0, 0, 0, /* .plt size goes here */
6310 0, /* Augmentation size */
6311 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
6312 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6313 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
6314 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6315 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
6316 13, /* Block length */
6317 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
6318 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
6319 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
6320 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
6321 DW_CFA_nop
, DW_CFA_nop
6324 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
6326 elf_i386_nacl_plt0_entry
, /* plt0_entry */
6327 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
6328 2, /* plt0_got1_offset */
6329 8, /* plt0_got2_offset */
6330 elf_i386_nacl_plt_entry
, /* plt_entry */
6331 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
6332 2, /* plt_got_offset */
6333 33, /* plt_reloc_offset */
6334 38, /* plt_plt_offset */
6335 32, /* plt_lazy_offset */
6336 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
6337 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
6338 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
6339 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
6342 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
6344 &elf_i386_nacl_plt
, /* plt */
6345 0x90, /* plt0_pad_byte: nop insn */
6350 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
6352 /* Set the right machine number for a NaCl i386 ELF32 file. */
6353 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
6357 #undef elf_backend_arch_data
6358 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6360 #undef elf_backend_object_p
6361 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6362 #undef elf_backend_modify_segment_map
6363 #define elf_backend_modify_segment_map nacl_modify_segment_map
6364 #undef elf_backend_modify_program_headers
6365 #define elf_backend_modify_program_headers nacl_modify_program_headers
6366 #undef elf_backend_final_write_processing
6367 #define elf_backend_final_write_processing nacl_final_write_processing
6369 #include "elf32-target.h"
6371 /* Restore defaults. */
6372 #undef elf_backend_object_p
6373 #undef elf_backend_modify_segment_map
6374 #undef elf_backend_modify_program_headers
6375 #undef elf_backend_final_write_processing
6377 /* VxWorks support. */
6379 #undef TARGET_LITTLE_SYM
6380 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6381 #undef TARGET_LITTLE_NAME
6382 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6384 #undef elf_backend_plt_alignment
6385 #define elf_backend_plt_alignment 4
6387 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
6389 &elf_i386_plt
, /* plt */
6390 0x90, /* plt0_pad_byte */
6394 #undef elf_backend_arch_data
6395 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6397 #undef elf_backend_relocs_compatible
6398 #undef elf_backend_add_symbol_hook
6399 #define elf_backend_add_symbol_hook \
6400 elf_vxworks_add_symbol_hook
6401 #undef elf_backend_link_output_symbol_hook
6402 #define elf_backend_link_output_symbol_hook \
6403 elf_vxworks_link_output_symbol_hook
6404 #undef elf_backend_emit_relocs
6405 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6406 #undef elf_backend_final_write_processing
6407 #define elf_backend_final_write_processing \
6408 elf_vxworks_final_write_processing
6409 #undef elf_backend_static_tls_alignment
6411 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6413 #undef elf_backend_want_plt_sym
6414 #define elf_backend_want_plt_sym 1
6417 #define elf32_bed elf32_i386_vxworks_bed
6419 #include "elf32-target.h"