1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2017 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 /* xgettext:c-format */
387 _bfd_error_handler (_("%B: invalid relocation type %d"),
391 /* PR 17512: file: 0f67f69d. */
392 if (elf_howto_table
[indx
].type
!= r_type
)
394 return &elf_howto_table
[indx
];
398 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
400 Elf_Internal_Rela
*dst
)
402 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
403 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
406 /* Return whether a symbol name implies a local label. The UnixWare
407 2.1 cc generates temporary symbols that start with .X, so we
408 recognize them here. FIXME: do other SVR4 compilers also use .X?.
409 If so, we should move the .X recognition into
410 _bfd_elf_is_local_label_name. */
413 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
415 if (name
[0] == '.' && name
[1] == 'X')
418 return _bfd_elf_is_local_label_name (abfd
, name
);
421 /* Support for core dump NOTE sections. */
424 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
429 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
431 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
437 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
440 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
444 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
448 switch (note
->descsz
)
453 case 144: /* Linux/i386 */
455 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
458 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
468 /* Make a ".reg/999" section. */
469 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
470 size
, note
->descpos
+ offset
);
474 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
476 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
478 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
483 elf_tdata (abfd
)->core
->program
484 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
485 elf_tdata (abfd
)->core
->command
486 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
490 switch (note
->descsz
)
495 case 124: /* Linux/i386 elf_prpsinfo. */
496 elf_tdata (abfd
)->core
->pid
497 = bfd_get_32 (abfd
, note
->descdata
+ 12);
498 elf_tdata (abfd
)->core
->program
499 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
500 elf_tdata (abfd
)->core
->command
501 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
505 /* Note that for some reason, a spurious space is tacked
506 onto the end of the args in some (at least one anyway)
507 implementations, so strip it off if it exists. */
509 char *command
= elf_tdata (abfd
)->core
->command
;
510 int n
= strlen (command
);
512 if (0 < n
&& command
[n
- 1] == ' ')
513 command
[n
- 1] = '\0';
519 /* Functions for the i386 ELF linker.
521 In order to gain some understanding of code in this file without
522 knowing all the intricate details of the linker, note the
525 Functions named elf_i386_* are called by external routines, other
526 functions are only called locally. elf_i386_* functions appear
527 in this file more or less in the order in which they are called
528 from external routines. eg. elf_i386_check_relocs is called
529 early in the link process, elf_i386_finish_dynamic_sections is
530 one of the last functions. */
533 /* The name of the dynamic interpreter. This is put in the .interp
536 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
538 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
539 copying dynamic variables from a shared lib into an app's dynbss
540 section, and instead use a dynamic relocation to point into the
542 #define ELIMINATE_COPY_RELOCS 1
544 /* The size in bytes of an entry in the lazy procedure linkage table. */
546 #define LAZY_PLT_ENTRY_SIZE 16
548 /* The size in bytes of an entry in the non-lazy procedure linkage
551 #define NON_LAZY_PLT_ENTRY_SIZE 8
553 /* The first entry in an absolute lazy procedure linkage table looks
554 like this. See the SVR4 ABI i386 supplement to see how this works.
555 Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */
557 static const bfd_byte elf_i386_lazy_plt0_entry
[12] =
559 0xff, 0x35, /* pushl contents of address */
560 0, 0, 0, 0, /* replaced with address of .got + 4. */
561 0xff, 0x25, /* jmp indirect */
562 0, 0, 0, 0 /* replaced with address of .got + 8. */
565 /* Subsequent entries in an absolute lazy procedure linkage table look
568 static const bfd_byte elf_i386_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
570 0xff, 0x25, /* jmp indirect */
571 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
572 0x68, /* pushl immediate */
573 0, 0, 0, 0, /* replaced with offset into relocation table. */
574 0xe9, /* jmp relative */
575 0, 0, 0, 0 /* replaced with offset to start of .plt. */
578 /* The first entry in a PIC lazy procedure linkage table look like
579 this. Will be padded to LAZY_PLT_ENTRY_SIZE with
580 lazy_plt->plt0_pad_byte. */
582 static const bfd_byte elf_i386_pic_lazy_plt0_entry
[12] =
584 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
585 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
588 /* Subsequent entries in a PIC lazy procedure linkage table look like
591 static const bfd_byte elf_i386_pic_lazy_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
593 0xff, 0xa3, /* jmp *offset(%ebx) */
594 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
595 0x68, /* pushl immediate */
596 0, 0, 0, 0, /* replaced with offset into relocation table. */
597 0xe9, /* jmp relative */
598 0, 0, 0, 0 /* replaced with offset to start of .plt. */
601 /* Entries in the non-lazy procedure linkage table look like this. */
603 static const bfd_byte elf_i386_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
605 0xff, 0x25, /* jmp indirect */
606 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
607 0x66, 0x90 /* xchg %ax,%ax */
610 /* Entries in the PIC non-lazy procedure linkage table look like
613 static const bfd_byte elf_i386_pic_non_lazy_plt_entry
[NON_LAZY_PLT_ENTRY_SIZE
] =
615 0xff, 0xa3, /* jmp *offset(%ebx) */
616 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
617 0x66, 0x90 /* xchg %ax,%ax */
620 /* The first entry in an absolute IBT-enabled lazy procedure linkage
621 table looks like this. */
623 static const bfd_byte elf_i386_lazy_ibt_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
625 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */
626 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */
627 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
630 /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage
631 table look like this. Subsequent entries for a PIC IBT-enabled lazy
632 procedure linkage table are the same. */
634 static const bfd_byte elf_i386_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
636 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
637 0x68, 0, 0, 0, 0, /* pushl immediate */
638 0xe9, 0, 0, 0, 0, /* jmp relative */
639 0x66, 0x90 /* xchg %ax,%ax */
642 /* The first entry in a PIC IBT-enabled lazy procedure linkage table
645 static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry
[LAZY_PLT_ENTRY_SIZE
] =
647 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
648 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */
649 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */
652 /* Entries for branches with IBT-enabled in the absolute non-lazey
653 procedure linkage table look like this. They have the same size
654 as the lazy PLT entry. */
656 static const bfd_byte elf_i386_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
658 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
659 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */
660 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
663 /* Entries for branches with IBT-enabled in the PIC non-lazey procedure
664 linkage table look like this. They have the same size as the lazy
667 static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry
[LAZY_PLT_ENTRY_SIZE
] =
669 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */
670 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */
671 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */
674 /* .eh_frame covering the lazy .plt section. */
676 static const bfd_byte elf_i386_eh_frame_lazy_plt
[] =
678 #define PLT_CIE_LENGTH 20
679 #define PLT_FDE_LENGTH 36
680 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
681 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
682 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
683 0, 0, 0, 0, /* CIE ID */
685 'z', 'R', 0, /* Augmentation string */
686 1, /* Code alignment factor */
687 0x7c, /* Data alignment factor */
688 8, /* Return address column */
689 1, /* Augmentation size */
690 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
691 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
692 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
693 DW_CFA_nop
, DW_CFA_nop
,
695 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
696 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
697 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
698 0, 0, 0, 0, /* .plt size goes here */
699 0, /* Augmentation size */
700 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
701 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
702 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
703 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
704 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
705 11, /* Block length */
706 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
707 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
708 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
709 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
710 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
713 /* .eh_frame covering the lazy .plt section with IBT-enabled. */
715 static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt
[] =
717 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
718 0, 0, 0, 0, /* CIE ID */
720 'z', 'R', 0, /* Augmentation string */
721 1, /* Code alignment factor */
722 0x7c, /* Data alignment factor */
723 8, /* Return address column */
724 1, /* Augmentation size */
725 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
726 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
727 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
728 DW_CFA_nop
, DW_CFA_nop
,
730 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
731 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
732 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
733 0, 0, 0, 0, /* .plt size goes here */
734 0, /* Augmentation size */
735 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
736 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
737 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
738 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
739 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
740 11, /* Block length */
741 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
742 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
743 DW_OP_lit15
, DW_OP_and
, DW_OP_lit9
, DW_OP_ge
,
744 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
745 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
748 /* .eh_frame covering the non-lazy .plt section. */
750 static const bfd_byte elf_i386_eh_frame_non_lazy_plt
[] =
752 #define PLT_GOT_FDE_LENGTH 16
753 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
754 0, 0, 0, 0, /* CIE ID */
756 'z', 'R', 0, /* Augmentation string */
757 1, /* Code alignment factor */
758 0x7c, /* Data alignment factor */
759 8, /* Return address column */
760 1, /* Augmentation size */
761 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
762 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
763 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
764 DW_CFA_nop
, DW_CFA_nop
,
766 PLT_GOT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
767 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
768 0, 0, 0, 0, /* the start of non-lazy .plt goes here */
769 0, 0, 0, 0, /* non-lazy .plt size goes here */
770 0, /* Augmentation size */
771 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
774 struct elf_i386_lazy_plt_layout
776 /* The first entry in an absolute lazy procedure linkage table looks
778 const bfd_byte
*plt0_entry
;
779 unsigned int plt0_entry_size
;
781 /* Offsets into plt0_entry that are to be replaced with GOT[1] and
783 unsigned int plt0_got1_offset
;
784 unsigned int plt0_got2_offset
;
786 /* Later entries in an absolute lazy procedure linkage table look
788 const bfd_byte
*plt_entry
;
789 unsigned int plt_entry_size
;
791 /* Offsets into plt_entry that are to be replaced with... */
792 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
793 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
794 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
796 /* Offset into plt_entry where the initial value of the GOT entry
798 unsigned int plt_lazy_offset
;
800 /* The first entry in a PIC lazy procedure linkage table looks like
802 const bfd_byte
*pic_plt0_entry
;
804 /* Subsequent entries in a PIC lazy procedure linkage table look
806 const bfd_byte
*pic_plt_entry
;
808 /* .eh_frame covering the lazy .plt section. */
809 const bfd_byte
*eh_frame_plt
;
810 unsigned int eh_frame_plt_size
;
813 struct elf_i386_non_lazy_plt_layout
815 /* Entries in an absolute non-lazy procedure linkage table look like
817 const bfd_byte
*plt_entry
;
818 /* Entries in a PIC non-lazy procedure linkage table look like this. */
819 const bfd_byte
*pic_plt_entry
;
821 unsigned int plt_entry_size
;
823 /* Offsets into plt_entry that are to be replaced with... */
824 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
826 /* .eh_frame covering the non-lazy .plt section. */
827 const bfd_byte
*eh_frame_plt
;
828 unsigned int eh_frame_plt_size
;
831 struct elf_i386_plt_layout
833 /* The first entry in a lazy procedure linkage table looks like this. */
834 const bfd_byte
*plt0_entry
;
835 /* Entries in a procedure linkage table look like this. */
836 const bfd_byte
*plt_entry
;
837 unsigned int plt_entry_size
;
840 unsigned int has_plt0
;
842 /* Offsets into plt_entry that are to be replaced with... */
843 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
845 /* .eh_frame covering the .plt section. */
846 const bfd_byte
*eh_frame_plt
;
847 unsigned int eh_frame_plt_size
;
850 /* These are the standard parameters. */
851 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt
=
853 elf_i386_lazy_plt0_entry
, /* plt0_entry */
854 sizeof (elf_i386_lazy_plt0_entry
), /* plt0_entry_size */
855 2, /* plt0_got1_offset */
856 8, /* plt0_got2_offset */
857 elf_i386_lazy_plt_entry
, /* plt_entry */
858 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
859 2, /* plt_got_offset */
860 7, /* plt_reloc_offset */
861 12, /* plt_plt_offset */
862 6, /* plt_lazy_offset */
863 elf_i386_pic_lazy_plt0_entry
, /* pic_plt0_entry */
864 elf_i386_pic_lazy_plt_entry
, /* pic_plt_entry */
865 elf_i386_eh_frame_lazy_plt
, /* eh_frame_plt */
866 sizeof (elf_i386_eh_frame_lazy_plt
) /* eh_frame_plt_size */
869 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt
=
871 elf_i386_non_lazy_plt_entry
, /* plt_entry */
872 elf_i386_pic_non_lazy_plt_entry
, /* pic_plt_entry */
873 NON_LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
874 2, /* plt_got_offset */
875 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
876 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
879 static const struct elf_i386_lazy_plt_layout elf_i386_lazy_ibt_plt
=
881 elf_i386_lazy_ibt_plt0_entry
, /* plt0_entry */
882 sizeof (elf_i386_lazy_ibt_plt0_entry
), /* plt0_entry_size */
883 2, /* plt0_got1_offset */
884 8, /* plt0_got2_offset */
885 elf_i386_lazy_ibt_plt_entry
, /* plt_entry */
886 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
887 4+2, /* plt_got_offset */
888 4+1, /* plt_reloc_offset */
889 4+6, /* plt_plt_offset */
890 0, /* plt_lazy_offset */
891 elf_i386_pic_lazy_ibt_plt0_entry
, /* pic_plt0_entry */
892 elf_i386_lazy_ibt_plt_entry
, /* pic_plt_entry */
893 elf_i386_eh_frame_lazy_ibt_plt
, /* eh_frame_plt */
894 sizeof (elf_i386_eh_frame_lazy_ibt_plt
) /* eh_frame_plt_size */
897 static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt
=
899 elf_i386_non_lazy_ibt_plt_entry
, /* plt_entry */
900 elf_i386_pic_non_lazy_ibt_plt_entry
,/* pic_plt_entry */
901 LAZY_PLT_ENTRY_SIZE
, /* plt_entry_size */
902 4+2, /* plt_got_offset */
903 elf_i386_eh_frame_non_lazy_plt
, /* eh_frame_plt */
904 sizeof (elf_i386_eh_frame_non_lazy_plt
) /* eh_frame_plt_size */
908 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
909 for the PLTResolve stub and then for each PLT entry. */
910 #define PLTRESOLVE_RELOCS_SHLIB 0
911 #define PLTRESOLVE_RELOCS 2
912 #define PLT_NON_JUMP_SLOT_RELOCS 2
914 /* Architecture-specific backend data for i386. */
916 struct elf_i386_backend_data
918 /* Value used to fill the unused bytes of the first PLT entry. */
919 bfd_byte plt0_pad_byte
;
930 #define get_elf_i386_backend_data(abfd) \
931 ((const struct elf_i386_backend_data *) \
932 get_elf_backend_data (abfd)->arch_data)
934 /* These are the standard parameters. */
935 static const struct elf_i386_backend_data elf_i386_arch_bed
=
937 0, /* plt0_pad_byte */
941 #define elf_backend_arch_data &elf_i386_arch_bed
943 /* Is a undefined weak symbol which is resolved to 0. Reference to an
944 undefined weak symbol is resolved to 0 when building executable if
946 1. Has non-GOT/non-PLT relocations in text section. Or
947 2. Has no GOT/PLT relocation.
948 Local undefined weak symbol is always resolved to 0.
950 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
951 ((EH)->elf.root.type == bfd_link_hash_undefweak \
952 && ((EH)->elf.forced_local \
953 || (bfd_link_executable (INFO) \
954 && (elf_i386_hash_table (INFO)->interp == NULL \
956 || (EH)->has_non_got_reloc \
957 || !(INFO)->dynamic_undefined_weak))))
959 /* i386 ELF linker hash entry. */
961 struct elf_i386_link_hash_entry
963 struct elf_link_hash_entry elf
;
965 /* Track dynamic relocs copied for this symbol. */
966 struct elf_dyn_relocs
*dyn_relocs
;
968 #define GOT_UNKNOWN 0
972 #define GOT_TLS_IE_POS 5
973 #define GOT_TLS_IE_NEG 6
974 #define GOT_TLS_IE_BOTH 7
975 #define GOT_TLS_GDESC 8
976 #define GOT_TLS_GD_BOTH_P(type) \
977 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
978 #define GOT_TLS_GD_P(type) \
979 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
980 #define GOT_TLS_GDESC_P(type) \
981 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
982 #define GOT_TLS_GD_ANY_P(type) \
983 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
984 unsigned char tls_type
;
986 /* Symbol is referenced by R_386_GOTOFF relocation. */
987 unsigned int gotoff_ref
: 1;
989 /* Symbol has GOT or PLT relocations. */
990 unsigned int has_got_reloc
: 1;
992 /* Symbol has non-GOT/non-PLT relocations in text sections. */
993 unsigned int has_non_got_reloc
: 1;
995 /* Don't call finish_dynamic_symbol on this symbol. */
996 unsigned int no_finish_dynamic_symbol
: 1;
998 /* TRUE if symbol symbol is __tls_get_addr. */
999 unsigned int tls_get_addr
: 1;
1001 /* Reference count of C/C++ function pointer relocations in read-write
1002 section which can be resolved at run-time. */
1003 bfd_signed_vma func_pointer_refcount
;
1005 /* Information about the GOT PLT entry. Filled when there are both
1006 GOT and PLT relocations against the same function. */
1007 union gotplt_union plt_got
;
1009 /* Information about the second PLT entry. */
1010 union gotplt_union plt_second
;
1012 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
1013 starting at the end of the jump table. */
1014 bfd_vma tlsdesc_got
;
1017 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
1019 struct elf_i386_obj_tdata
1021 struct elf_obj_tdata root
;
1023 /* tls_type for each local got entry. */
1024 char *local_got_tls_type
;
1026 /* GOTPLT entries for TLS descriptors. */
1027 bfd_vma
*local_tlsdesc_gotent
;
1030 #define elf_i386_tdata(abfd) \
1031 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
1033 #define elf_i386_local_got_tls_type(abfd) \
1034 (elf_i386_tdata (abfd)->local_got_tls_type)
1036 #define elf_i386_local_tlsdesc_gotent(abfd) \
1037 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
1039 #define is_i386_elf(bfd) \
1040 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
1041 && elf_tdata (bfd) != NULL \
1042 && elf_object_id (bfd) == I386_ELF_DATA)
1045 elf_i386_mkobject (bfd
*abfd
)
1047 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
1051 /* i386 ELF linker hash table. */
1053 struct elf_i386_link_hash_table
1055 struct elf_link_hash_table elf
;
1057 /* Short-cuts to get to dynamic linker sections. */
1059 asection
*plt_eh_frame
;
1060 asection
*plt_second
;
1061 asection
*plt_second_eh_frame
;
1063 asection
*plt_got_eh_frame
;
1065 /* Parameters describing PLT generation. */
1066 struct elf_i386_plt_layout plt
;
1068 /* Parameters describing lazy PLT generation. */
1069 const struct elf_i386_lazy_plt_layout
*lazy_plt
;
1071 /* Parameters describing non-lazy PLT generation. */
1072 const struct elf_i386_non_lazy_plt_layout
*non_lazy_plt
;
1076 bfd_signed_vma refcount
;
1080 /* The amount of space used by the reserved portion of the sgotplt
1081 section, plus whatever space is used by the jump slots. */
1082 bfd_vma sgotplt_jump_table_size
;
1084 /* Small local sym cache. */
1085 struct sym_cache sym_cache
;
1087 /* _TLS_MODULE_BASE_ symbol. */
1088 struct bfd_link_hash_entry
*tls_module_base
;
1090 /* Used by local STT_GNU_IFUNC symbols. */
1091 htab_t loc_hash_table
;
1092 void * loc_hash_memory
;
1094 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
1097 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
1098 bfd_vma next_tls_desc_index
;
1100 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
1101 bfd_vma next_jump_slot_index
;
1103 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
1104 bfd_vma next_irelative_index
;
1106 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
1107 to read-only sections. */
1108 bfd_boolean readonly_dynrelocs_against_ifunc
;
1111 /* Get the i386 ELF linker hash table from a link_info structure. */
1113 #define elf_i386_hash_table(p) \
1114 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
1115 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
1117 #define elf_i386_compute_jump_table_size(htab) \
1118 ((htab)->elf.srelplt->reloc_count * 4)
1120 /* Create an entry in an i386 ELF linker hash table. */
1122 static struct bfd_hash_entry
*
1123 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
1124 struct bfd_hash_table
*table
,
1127 /* Allocate the structure if it has not already been allocated by a
1131 entry
= (struct bfd_hash_entry
*)
1132 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
1137 /* Call the allocation method of the superclass. */
1138 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
1141 struct elf_i386_link_hash_entry
*eh
;
1143 eh
= (struct elf_i386_link_hash_entry
*) entry
;
1144 eh
->dyn_relocs
= NULL
;
1145 eh
->tls_type
= GOT_UNKNOWN
;
1147 eh
->has_got_reloc
= 0;
1148 eh
->has_non_got_reloc
= 0;
1149 eh
->no_finish_dynamic_symbol
= 0;
1150 eh
->tls_get_addr
= 0;
1151 eh
->func_pointer_refcount
= 0;
1152 eh
->plt_got
.offset
= (bfd_vma
) -1;
1153 eh
->tlsdesc_got
= (bfd_vma
) -1;
1159 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
1160 for local symbol so that we can handle local STT_GNU_IFUNC symbols
1161 as global symbol. We reuse indx and dynstr_index for local symbol
1162 hash since they aren't used by global symbols in this backend. */
1165 elf_i386_local_htab_hash (const void *ptr
)
1167 struct elf_link_hash_entry
*h
1168 = (struct elf_link_hash_entry
*) ptr
;
1169 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
1172 /* Compare local hash entries. */
1175 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
1177 struct elf_link_hash_entry
*h1
1178 = (struct elf_link_hash_entry
*) ptr1
;
1179 struct elf_link_hash_entry
*h2
1180 = (struct elf_link_hash_entry
*) ptr2
;
1182 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
1185 /* Find and/or create a hash entry for local symbol. */
1187 static struct elf_link_hash_entry
*
1188 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
1189 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
1192 struct elf_i386_link_hash_entry e
, *ret
;
1193 asection
*sec
= abfd
->sections
;
1194 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
1195 ELF32_R_SYM (rel
->r_info
));
1198 e
.elf
.indx
= sec
->id
;
1199 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1200 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
1201 create
? INSERT
: NO_INSERT
);
1208 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
1212 ret
= (struct elf_i386_link_hash_entry
*)
1213 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
1214 sizeof (struct elf_i386_link_hash_entry
));
1217 memset (ret
, 0, sizeof (*ret
));
1218 ret
->elf
.indx
= sec
->id
;
1219 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
1220 ret
->elf
.dynindx
= -1;
1221 ret
->func_pointer_refcount
= 0;
1222 ret
->plt_got
.offset
= (bfd_vma
) -1;
1228 /* Destroy an i386 ELF linker hash table. */
1231 elf_i386_link_hash_table_free (bfd
*obfd
)
1233 struct elf_i386_link_hash_table
*htab
1234 = (struct elf_i386_link_hash_table
*) obfd
->link
.hash
;
1236 if (htab
->loc_hash_table
)
1237 htab_delete (htab
->loc_hash_table
);
1238 if (htab
->loc_hash_memory
)
1239 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
1240 _bfd_elf_link_hash_table_free (obfd
);
1243 /* Create an i386 ELF linker hash table. */
1245 static struct bfd_link_hash_table
*
1246 elf_i386_link_hash_table_create (bfd
*abfd
)
1248 struct elf_i386_link_hash_table
*ret
;
1249 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
1251 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
1255 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
1256 elf_i386_link_hash_newfunc
,
1257 sizeof (struct elf_i386_link_hash_entry
),
1264 ret
->loc_hash_table
= htab_try_create (1024,
1265 elf_i386_local_htab_hash
,
1266 elf_i386_local_htab_eq
,
1268 ret
->loc_hash_memory
= objalloc_create ();
1269 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
1271 elf_i386_link_hash_table_free (abfd
);
1274 ret
->elf
.root
.hash_table_free
= elf_i386_link_hash_table_free
;
1276 return &ret
->elf
.root
;
1279 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1282 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1283 struct elf_link_hash_entry
*dir
,
1284 struct elf_link_hash_entry
*ind
)
1286 struct elf_i386_link_hash_entry
*edir
, *eind
;
1288 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1289 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1291 if (eind
->dyn_relocs
!= NULL
)
1293 if (edir
->dyn_relocs
!= NULL
)
1295 struct elf_dyn_relocs
**pp
;
1296 struct elf_dyn_relocs
*p
;
1298 /* Add reloc counts against the indirect sym to the direct sym
1299 list. Merge any entries against the same section. */
1300 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1302 struct elf_dyn_relocs
*q
;
1304 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1305 if (q
->sec
== p
->sec
)
1307 q
->pc_count
+= p
->pc_count
;
1308 q
->count
+= p
->count
;
1315 *pp
= edir
->dyn_relocs
;
1318 edir
->dyn_relocs
= eind
->dyn_relocs
;
1319 eind
->dyn_relocs
= NULL
;
1322 if (ind
->root
.type
== bfd_link_hash_indirect
1323 && dir
->got
.refcount
<= 0)
1325 edir
->tls_type
= eind
->tls_type
;
1326 eind
->tls_type
= GOT_UNKNOWN
;
1329 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1330 generate a R_386_COPY reloc. */
1331 edir
->gotoff_ref
|= eind
->gotoff_ref
;
1333 edir
->has_got_reloc
|= eind
->has_got_reloc
;
1334 edir
->has_non_got_reloc
|= eind
->has_non_got_reloc
;
1336 if (ELIMINATE_COPY_RELOCS
1337 && ind
->root
.type
!= bfd_link_hash_indirect
1338 && dir
->dynamic_adjusted
)
1340 /* If called to transfer flags for a weakdef during processing
1341 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1342 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1343 if (dir
->versioned
!= versioned_hidden
)
1344 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1345 dir
->ref_regular
|= ind
->ref_regular
;
1346 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1347 dir
->needs_plt
|= ind
->needs_plt
;
1348 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1352 if (eind
->func_pointer_refcount
> 0)
1354 edir
->func_pointer_refcount
+= eind
->func_pointer_refcount
;
1355 eind
->func_pointer_refcount
= 0;
1358 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1362 /* Return TRUE if the TLS access code sequence support transition
1366 elf_i386_check_tls_transition (asection
*sec
,
1368 Elf_Internal_Shdr
*symtab_hdr
,
1369 struct elf_link_hash_entry
**sym_hashes
,
1370 unsigned int r_type
,
1371 const Elf_Internal_Rela
*rel
,
1372 const Elf_Internal_Rela
*relend
)
1374 unsigned int val
, type
, reg
;
1375 unsigned long r_symndx
;
1376 struct elf_link_hash_entry
*h
;
1379 bfd_boolean indirect_call
;
1381 offset
= rel
->r_offset
;
1386 if (offset
< 2 || (rel
+ 1) >= relend
)
1389 indirect_call
= FALSE
;
1390 call
= contents
+ offset
+ 4;
1393 if (r_type
== R_386_TLS_GD
)
1395 /* Check transition from GD access model. Only
1396 leal foo@tlsgd(,%ebx,1), %eax
1397 call ___tls_get_addr@PLT
1399 leal foo@tlsgd(%ebx) %eax
1400 call ___tls_get_addr@PLT
1403 leal foo@tlsgd(%reg), %eax
1404 call *___tls_get_addr@GOT(%reg)
1405 which may be converted to
1406 addr32 call ___tls_get_addr
1407 can transit to different access model. */
1408 if ((offset
+ 10) > sec
->size
1409 || (type
!= 0x8d && type
!= 0x04))
1414 /* leal foo@tlsgd(,%ebx,1), %eax
1415 call ___tls_get_addr@PLT */
1419 if (*(call
- 7) != 0x8d
1427 leal foo@tlsgd(%ebx), %eax
1428 call ___tls_get_addr@PLT
1431 leal foo@tlsgd(%reg), %eax
1432 call *___tls_get_addr@GOT(%reg)
1433 which may be converted to
1434 addr32 call ___tls_get_addr
1436 %eax can't be used as the GOT base register since it
1437 is used to pass parameter to ___tls_get_addr. */
1439 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1442 indirect_call
= call
[0] == 0xff;
1443 if (!(reg
== 3 && call
[0] == 0xe8 && call
[5] == 0x90)
1444 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1446 && (call
[1] & 0xf8) == 0x90
1447 && (call
[1] & 0x7) == reg
))
1453 /* Check transition from LD access model. Only
1454 leal foo@tlsldm(%ebx), %eax
1455 call ___tls_get_addr@PLT
1457 leal foo@tlsldm(%reg), %eax
1458 call *___tls_get_addr@GOT(%reg)
1459 which may be converted to
1460 addr32 call ___tls_get_addr
1461 can transit to different access model. */
1462 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1465 /* %eax can't be used as the GOT base register since it is
1466 used to pass parameter to ___tls_get_addr. */
1468 if ((val
& 0xf8) != 0x80 || reg
== 4 || reg
== 0)
1471 indirect_call
= call
[0] == 0xff;
1472 if (!(reg
== 3 && call
[0] == 0xe8)
1473 && !(call
[0] == 0x67 && call
[1] == 0xe8)
1475 && (call
[1] & 0xf8) == 0x90
1476 && (call
[1] & 0x7) == reg
))
1480 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1481 if (r_symndx
< symtab_hdr
->sh_info
)
1484 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1486 || !((struct elf_i386_link_hash_entry
*) h
)->tls_get_addr
)
1488 else if (indirect_call
)
1489 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_GOT32X
);
1491 return (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1492 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
1495 /* Check transition from IE access model:
1496 movl foo@indntpoff(%rip), %eax
1497 movl foo@indntpoff(%rip), %reg
1498 addl foo@indntpoff(%rip), %reg
1501 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1504 /* Check "movl foo@tpoff(%rip), %eax" first. */
1505 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1512 /* Check movl|addl foo@tpoff(%rip), %reg. */
1513 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1514 return ((type
== 0x8b || type
== 0x03)
1515 && (val
& 0xc7) == 0x05);
1517 case R_386_TLS_GOTIE
:
1518 case R_386_TLS_IE_32
:
1519 /* Check transition from {IE_32,GOTIE} access model:
1520 subl foo@{tpoff,gontoff}(%reg1), %reg2
1521 movl foo@{tpoff,gontoff}(%reg1), %reg2
1522 addl foo@{tpoff,gontoff}(%reg1), %reg2
1525 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1528 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1529 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1532 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1533 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1535 case R_386_TLS_GOTDESC
:
1536 /* Check transition from GDesc access model:
1537 leal x@tlsdesc(%ebx), %eax
1539 Make sure it's a leal adding ebx to a 32-bit offset
1540 into any register, although it's probably almost always
1543 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1546 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1549 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1550 return (val
& 0xc7) == 0x83;
1552 case R_386_TLS_DESC_CALL
:
1553 /* Check transition from GDesc access model:
1554 call *x@tlsdesc(%eax)
1556 if (offset
+ 2 <= sec
->size
)
1558 /* Make sure that it's a call *x@tlsdesc(%eax). */
1559 call
= contents
+ offset
;
1560 return call
[0] == 0xff && call
[1] == 0x10;
1570 /* Return TRUE if the TLS access transition is OK or no transition
1571 will be performed. Update R_TYPE if there is a transition. */
1574 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1575 asection
*sec
, bfd_byte
*contents
,
1576 Elf_Internal_Shdr
*symtab_hdr
,
1577 struct elf_link_hash_entry
**sym_hashes
,
1578 unsigned int *r_type
, int tls_type
,
1579 const Elf_Internal_Rela
*rel
,
1580 const Elf_Internal_Rela
*relend
,
1581 struct elf_link_hash_entry
*h
,
1582 unsigned long r_symndx
,
1583 bfd_boolean from_relocate_section
)
1585 unsigned int from_type
= *r_type
;
1586 unsigned int to_type
= from_type
;
1587 bfd_boolean check
= TRUE
;
1589 /* Skip TLS transition for functions. */
1591 && (h
->type
== STT_FUNC
1592 || h
->type
== STT_GNU_IFUNC
))
1598 case R_386_TLS_GOTDESC
:
1599 case R_386_TLS_DESC_CALL
:
1600 case R_386_TLS_IE_32
:
1602 case R_386_TLS_GOTIE
:
1603 if (bfd_link_executable (info
))
1606 to_type
= R_386_TLS_LE_32
;
1607 else if (from_type
!= R_386_TLS_IE
1608 && from_type
!= R_386_TLS_GOTIE
)
1609 to_type
= R_386_TLS_IE_32
;
1612 /* When we are called from elf_i386_relocate_section, there may
1613 be additional transitions based on TLS_TYPE. */
1614 if (from_relocate_section
)
1616 unsigned int new_to_type
= to_type
;
1618 if (bfd_link_executable (info
)
1621 && (tls_type
& GOT_TLS_IE
))
1622 new_to_type
= R_386_TLS_LE_32
;
1624 if (to_type
== R_386_TLS_GD
1625 || to_type
== R_386_TLS_GOTDESC
1626 || to_type
== R_386_TLS_DESC_CALL
)
1628 if (tls_type
== GOT_TLS_IE_POS
)
1629 new_to_type
= R_386_TLS_GOTIE
;
1630 else if (tls_type
& GOT_TLS_IE
)
1631 new_to_type
= R_386_TLS_IE_32
;
1634 /* We checked the transition before when we were called from
1635 elf_i386_check_relocs. We only want to check the new
1636 transition which hasn't been checked before. */
1637 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1638 to_type
= new_to_type
;
1644 if (bfd_link_executable (info
))
1645 to_type
= R_386_TLS_LE_32
;
1652 /* Return TRUE if there is no transition. */
1653 if (from_type
== to_type
)
1656 /* Check if the transition can be performed. */
1658 && ! elf_i386_check_tls_transition (sec
, contents
,
1659 symtab_hdr
, sym_hashes
,
1660 from_type
, rel
, relend
))
1662 reloc_howto_type
*from
, *to
;
1665 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1666 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1669 name
= h
->root
.root
.string
;
1672 struct elf_i386_link_hash_table
*htab
;
1674 htab
= elf_i386_hash_table (info
);
1679 Elf_Internal_Sym
*isym
;
1681 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1683 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1688 /* xgettext:c-format */
1689 (_("%B: TLS transition from %s to %s against `%s' at %#Lx "
1690 "in section `%A' failed"),
1691 abfd
, from
->name
, to
->name
, name
,
1692 rel
->r_offset
, sec
);
1693 bfd_set_error (bfd_error_bad_value
);
1701 /* With the local symbol, foo, we convert
1702 mov foo@GOT[(%reg1)], %reg2
1704 lea foo[@GOTOFF(%reg1)], %reg2
1706 call/jmp *foo@GOT[(%reg)]
1708 nop call foo/jmp foo nop
1709 When PIC is false, convert
1710 test %reg1, foo@GOT[(%reg2)]
1714 binop foo@GOT[(%reg1)], %reg2
1717 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1722 elf_i386_convert_load_reloc (bfd
*abfd
, Elf_Internal_Shdr
*symtab_hdr
,
1724 Elf_Internal_Rela
*irel
,
1725 struct elf_link_hash_entry
*h
,
1726 bfd_boolean
*converted
,
1727 struct bfd_link_info
*link_info
)
1729 struct elf_i386_link_hash_table
*htab
;
1730 unsigned int opcode
;
1732 bfd_boolean baseless
;
1733 Elf_Internal_Sym
*isym
;
1734 unsigned int addend
;
1738 bfd_boolean to_reloc_32
;
1739 unsigned int r_type
;
1740 unsigned int r_symndx
;
1741 bfd_vma roff
= irel
->r_offset
;
1746 /* Addend for R_386_GOT32X relocations must be 0. */
1747 addend
= bfd_get_32 (abfd
, contents
+ roff
);
1751 htab
= elf_i386_hash_table (link_info
);
1752 is_pic
= bfd_link_pic (link_info
);
1754 r_type
= ELF32_R_TYPE (irel
->r_info
);
1755 r_symndx
= ELF32_R_SYM (irel
->r_info
);
1757 modrm
= bfd_get_8 (abfd
, contents
+ roff
- 1);
1758 baseless
= (modrm
& 0xc7) == 0x5;
1760 if (baseless
&& is_pic
)
1762 /* For PIC, disallow R_386_GOT32X without a base register
1763 since we don't know what the GOT base is. */
1768 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, abfd
,
1770 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1773 name
= h
->root
.root
.string
;
1776 /* xgettext:c-format */
1777 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base"
1778 " register can not be used when making a shared object"),
1783 opcode
= bfd_get_8 (abfd
, contents
+ roff
- 2);
1785 /* Convert to R_386_32 if PIC is false or there is no base
1787 to_reloc_32
= !is_pic
|| baseless
;
1789 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1793 if (opcode
== 0x0ff)
1794 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1795 goto convert_branch
;
1797 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1798 "test %reg1, foo@GOT(%reg2)" and
1799 "binop foo@GOT[(%reg1)], %reg2". */
1803 /* Undefined weak symbol is only bound locally in executable
1804 and its reference is resolved as 0. */
1805 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info
, TRUE
,
1806 elf_i386_hash_entry (h
)))
1810 /* No direct branch to 0 for PIC. */
1814 goto convert_branch
;
1818 /* We can convert load of address 0 to R_386_32. */
1826 /* We have "call/jmp *foo@GOT[(%reg)]". */
1827 if ((h
->root
.type
== bfd_link_hash_defined
1828 || h
->root
.type
== bfd_link_hash_defweak
)
1829 && SYMBOL_REFERENCES_LOCAL (link_info
, h
))
1831 /* The function is locally defined. */
1833 /* Convert R_386_GOT32X to R_386_PC32. */
1834 if (modrm
== 0x15 || (modrm
& 0xf8) == 0x90)
1836 struct elf_i386_link_hash_entry
*eh
1837 = (struct elf_i386_link_hash_entry
*) h
;
1839 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1842 /* To support TLS optimization, always use addr32 prefix
1843 for "call *___tls_get_addr@GOT(%reg)". */
1844 if (eh
&& eh
->tls_get_addr
)
1847 nop_offset
= irel
->r_offset
- 2;
1851 nop
= link_info
->call_nop_byte
;
1852 if (link_info
->call_nop_as_suffix
)
1854 nop_offset
= roff
+ 3;
1855 irel
->r_offset
-= 1;
1858 nop_offset
= roff
- 2;
1863 /* Convert to "jmp foo nop". */
1866 nop_offset
= roff
+ 3;
1867 irel
->r_offset
-= 1;
1870 bfd_put_8 (abfd
, nop
, contents
+ nop_offset
);
1871 bfd_put_8 (abfd
, modrm
, contents
+ irel
->r_offset
- 1);
1872 /* When converting to PC-relative relocation, we
1873 need to adjust addend by -4. */
1874 bfd_put_32 (abfd
, -4, contents
+ irel
->r_offset
);
1875 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_PC32
);
1882 /* We have "mov foo@GOT[(%re1g)], %reg2",
1883 "test %reg1, foo@GOT(%reg2)" and
1884 "binop foo@GOT[(%reg1)], %reg2".
1886 Avoid optimizing _DYNAMIC since ld.so may use its
1887 link-time address. */
1888 if (h
== htab
->elf
.hdynamic
)
1891 /* def_regular is set by an assignment in a linker script in
1892 bfd_elf_record_link_assignment. start_stop is set on
1893 __start_SECNAME/__stop_SECNAME which mark section SECNAME. */
1896 || h
->root
.type
== bfd_link_hash_defined
1897 || h
->root
.type
== bfd_link_hash_defweak
)
1898 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)))
1905 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1906 "mov $foo, %reg2" with R_386_32. */
1908 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1909 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1914 /* Convert "mov foo@GOT(%reg1), %reg2" to
1915 "lea foo@GOTOFF(%reg1), %reg2". */
1916 r_type
= R_386_GOTOFF
;
1922 /* Only R_386_32 is supported. */
1928 /* Convert "test %reg1, foo@GOT(%reg2)" to
1929 "test $foo, %reg1". */
1930 modrm
= 0xc0 | (modrm
& 0x38) >> 3;
1935 /* Convert "binop foo@GOT(%reg1), %reg2" to
1936 "binop $foo, %reg2". */
1938 | (modrm
& 0x38) >> 3
1942 bfd_put_8 (abfd
, modrm
, contents
+ roff
- 1);
1946 bfd_put_8 (abfd
, opcode
, contents
+ roff
- 2);
1947 irel
->r_info
= ELF32_R_INFO (r_symndx
, r_type
);
1956 /* Rename some of the generic section flags to better document how they
1958 #define need_convert_load sec_flg0
1959 #define check_relocs_failed sec_flg1
1961 /* Look through the relocs for a section during the first phase, and
1962 calculate needed space in the global offset table, procedure linkage
1963 table, and dynamic reloc sections. */
1966 elf_i386_check_relocs (bfd
*abfd
,
1967 struct bfd_link_info
*info
,
1969 const Elf_Internal_Rela
*relocs
)
1971 struct elf_i386_link_hash_table
*htab
;
1972 Elf_Internal_Shdr
*symtab_hdr
;
1973 struct elf_link_hash_entry
**sym_hashes
;
1974 const Elf_Internal_Rela
*rel
;
1975 const Elf_Internal_Rela
*rel_end
;
1979 if (bfd_link_relocatable (info
))
1982 /* Don't do anything special with non-loaded, non-alloced sections.
1983 In particular, any relocs in such sections should not affect GOT
1984 and PLT reference counting (ie. we don't allow them to create GOT
1985 or PLT entries), there's no possibility or desire to optimize TLS
1986 relocs, and there's not much point in propagating relocs to shared
1987 libs that the dynamic linker won't relocate. */
1988 if ((sec
->flags
& SEC_ALLOC
) == 0)
1991 BFD_ASSERT (is_i386_elf (abfd
));
1993 htab
= elf_i386_hash_table (info
);
1996 sec
->check_relocs_failed
= 1;
2000 /* Get the section contents. */
2001 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2002 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2003 else if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2005 sec
->check_relocs_failed
= 1;
2009 symtab_hdr
= &elf_symtab_hdr (abfd
);
2010 sym_hashes
= elf_sym_hashes (abfd
);
2014 rel_end
= relocs
+ sec
->reloc_count
;
2015 for (rel
= relocs
; rel
< rel_end
; rel
++)
2017 unsigned int r_type
;
2018 unsigned int r_symndx
;
2019 struct elf_link_hash_entry
*h
;
2020 struct elf_i386_link_hash_entry
*eh
;
2021 Elf_Internal_Sym
*isym
;
2023 bfd_boolean size_reloc
;
2025 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2026 r_type
= ELF32_R_TYPE (rel
->r_info
);
2028 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
2030 /* xgettext:c-format */
2031 _bfd_error_handler (_("%B: bad symbol index: %d"),
2036 if (r_symndx
< symtab_hdr
->sh_info
)
2038 /* A local symbol. */
2039 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2044 /* Check relocation against local STT_GNU_IFUNC symbol. */
2045 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
2047 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
2051 /* Fake a STT_GNU_IFUNC symbol. */
2052 h
->root
.root
.string
= bfd_elf_sym_name (abfd
, symtab_hdr
,
2054 h
->type
= STT_GNU_IFUNC
;
2057 h
->forced_local
= 1;
2058 h
->root
.type
= bfd_link_hash_defined
;
2066 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
2067 while (h
->root
.type
== bfd_link_hash_indirect
2068 || h
->root
.type
== bfd_link_hash_warning
)
2069 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2072 eh
= (struct elf_i386_link_hash_entry
*) h
;
2075 if (r_type
== R_386_GOTOFF
)
2078 /* It is referenced by a non-shared object. */
2080 h
->root
.non_ir_ref_regular
= 1;
2082 if (h
->type
== STT_GNU_IFUNC
)
2083 elf_tdata (info
->output_bfd
)->has_gnu_symbols
2084 |= elf_gnu_symbol_ifunc
;
2087 if (! elf_i386_tls_transition (info
, abfd
, sec
, contents
,
2088 symtab_hdr
, sym_hashes
,
2089 &r_type
, GOT_UNKNOWN
,
2090 rel
, rel_end
, h
, r_symndx
, FALSE
))
2096 htab
->tls_ldm_got
.refcount
+= 1;
2100 /* This symbol requires a procedure linkage table entry. We
2101 actually build the entry in adjust_dynamic_symbol,
2102 because this might be a case of linking PIC code which is
2103 never referenced by a dynamic object, in which case we
2104 don't need to generate a procedure linkage table entry
2107 /* If this is a local symbol, we resolve it directly without
2108 creating a procedure linkage table entry. */
2112 eh
->has_got_reloc
= 1;
2114 h
->plt
.refcount
+= 1;
2121 case R_386_TLS_IE_32
:
2123 case R_386_TLS_GOTIE
:
2124 if (!bfd_link_executable (info
))
2125 info
->flags
|= DF_STATIC_TLS
;
2131 case R_386_TLS_GOTDESC
:
2132 case R_386_TLS_DESC_CALL
:
2133 /* This symbol requires a global offset table entry. */
2135 int tls_type
, old_tls_type
;
2142 tls_type
= GOT_NORMAL
;
2144 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
2145 case R_386_TLS_GOTDESC
:
2146 case R_386_TLS_DESC_CALL
:
2147 tls_type
= GOT_TLS_GDESC
; break;
2148 case R_386_TLS_IE_32
:
2149 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
2150 tls_type
= GOT_TLS_IE_NEG
;
2152 /* If this is a GD->IE transition, we may use either of
2153 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2154 tls_type
= GOT_TLS_IE
;
2157 case R_386_TLS_GOTIE
:
2158 tls_type
= GOT_TLS_IE_POS
; break;
2163 h
->got
.refcount
+= 1;
2164 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2168 bfd_signed_vma
*local_got_refcounts
;
2170 /* This is a global offset table entry for a local symbol. */
2171 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2172 if (local_got_refcounts
== NULL
)
2176 size
= symtab_hdr
->sh_info
;
2177 size
*= (sizeof (bfd_signed_vma
)
2178 + sizeof (bfd_vma
) + sizeof(char));
2179 local_got_refcounts
= (bfd_signed_vma
*)
2180 bfd_zalloc (abfd
, size
);
2181 if (local_got_refcounts
== NULL
)
2183 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
2184 elf_i386_local_tlsdesc_gotent (abfd
)
2185 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
2186 elf_i386_local_got_tls_type (abfd
)
2187 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
2189 local_got_refcounts
[r_symndx
] += 1;
2190 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
2193 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
2194 tls_type
|= old_tls_type
;
2195 /* If a TLS symbol is accessed using IE at least once,
2196 there is no point to use dynamic model for it. */
2197 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
2198 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
2199 || (tls_type
& GOT_TLS_IE
) == 0))
2201 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
2202 tls_type
= old_tls_type
;
2203 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
2204 && GOT_TLS_GD_ANY_P (tls_type
))
2205 tls_type
|= old_tls_type
;
2209 name
= h
->root
.root
.string
;
2211 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
2214 /* xgettext:c-format */
2215 (_("%B: `%s' accessed both as normal and "
2216 "thread local symbol"),
2218 bfd_set_error (bfd_error_bad_value
);
2223 if (old_tls_type
!= tls_type
)
2226 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
2228 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
2236 if (r_type
!= R_386_TLS_IE
)
2239 eh
->has_got_reloc
= 1;
2244 case R_386_TLS_LE_32
:
2247 eh
->has_got_reloc
= 1;
2248 if (bfd_link_executable (info
))
2250 info
->flags
|= DF_STATIC_TLS
;
2255 if (eh
!= NULL
&& (sec
->flags
& SEC_CODE
) != 0)
2256 eh
->has_non_got_reloc
= 1;
2258 /* We are called after all symbols have been resolved. Only
2259 relocation against STT_GNU_IFUNC symbol must go through
2262 && (bfd_link_executable (info
)
2263 || h
->type
== STT_GNU_IFUNC
))
2265 /* If this reloc is in a read-only section, we might
2266 need a copy reloc. We can't check reliably at this
2267 stage whether the section is read-only, as input
2268 sections have not yet been mapped to output sections.
2269 Tentatively set the flag for now, and correct in
2270 adjust_dynamic_symbol. */
2273 /* We may need a .plt entry if the symbol is a function
2274 defined in a shared lib or is a STT_GNU_IFUNC function
2275 referenced from the code or read-only section. */
2277 || (sec
->flags
& (SEC_CODE
| SEC_READONLY
)) != 0)
2278 h
->plt
.refcount
+= 1;
2280 if (r_type
== R_386_PC32
)
2282 /* Since something like ".long foo - ." may be used
2283 as pointer, make sure that PLT is used if foo is
2284 a function defined in a shared library. */
2285 if ((sec
->flags
& SEC_CODE
) == 0)
2286 h
->pointer_equality_needed
= 1;
2287 else if (h
->type
== STT_GNU_IFUNC
2288 && bfd_link_pic (info
))
2291 /* xgettext:c-format */
2292 (_("%B: unsupported non-PIC call to IFUNC `%s'"),
2293 abfd
, h
->root
.root
.string
);
2294 bfd_set_error (bfd_error_bad_value
);
2300 h
->pointer_equality_needed
= 1;
2301 /* R_386_32 can be resolved at run-time. */
2302 if (r_type
== R_386_32
2303 && (sec
->flags
& SEC_READONLY
) == 0)
2304 eh
->func_pointer_refcount
+= 1;
2310 /* If we are creating a shared library, and this is a reloc
2311 against a global symbol, or a non PC relative reloc
2312 against a local symbol, then we need to copy the reloc
2313 into the shared library. However, if we are linking with
2314 -Bsymbolic, we do not need to copy a reloc against a
2315 global symbol which is defined in an object we are
2316 including in the link (i.e., DEF_REGULAR is set). At
2317 this point we have not seen all the input files, so it is
2318 possible that DEF_REGULAR is not set now but will be set
2319 later (it is never cleared). In case of a weak definition,
2320 DEF_REGULAR may be cleared later by a strong definition in
2321 a shared library. We account for that possibility below by
2322 storing information in the relocs_copied field of the hash
2323 table entry. A similar situation occurs when creating
2324 shared libraries and symbol visibility changes render the
2327 If on the other hand, we are creating an executable, we
2328 may need to keep relocations for symbols satisfied by a
2329 dynamic library if we manage to avoid copy relocs for the
2332 Generate dynamic pointer relocation against STT_GNU_IFUNC
2333 symbol in the non-code section. */
2334 if ((bfd_link_pic (info
)
2335 && (r_type
!= R_386_PC32
2337 && (! (bfd_link_pie (info
)
2338 || SYMBOLIC_BIND (info
, h
))
2339 || h
->root
.type
== bfd_link_hash_defweak
2340 || !h
->def_regular
))))
2342 && h
->type
== STT_GNU_IFUNC
2343 && r_type
== R_386_32
2344 && (sec
->flags
& SEC_CODE
) == 0)
2345 || (ELIMINATE_COPY_RELOCS
2346 && !bfd_link_pic (info
)
2348 && (h
->root
.type
== bfd_link_hash_defweak
2349 || !h
->def_regular
)))
2351 struct elf_dyn_relocs
*p
;
2352 struct elf_dyn_relocs
**head
;
2354 /* We must copy these reloc types into the output file.
2355 Create a reloc section in dynobj and make room for
2359 sreloc
= _bfd_elf_make_dynamic_reloc_section
2360 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
2366 /* If this is a global symbol, we count the number of
2367 relocations we need for this symbol. */
2370 head
= &eh
->dyn_relocs
;
2374 /* Track dynamic relocs needed for local syms too.
2375 We really need local syms available to do this
2380 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2385 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
2389 vpp
= &elf_section_data (s
)->local_dynrel
;
2390 head
= (struct elf_dyn_relocs
**)vpp
;
2394 if (p
== NULL
|| p
->sec
!= sec
)
2396 bfd_size_type amt
= sizeof *p
;
2397 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
2409 /* Count size relocation as PC-relative relocation. */
2410 if (r_type
== R_386_PC32
|| size_reloc
)
2415 /* This relocation describes the C++ object vtable hierarchy.
2416 Reconstruct it for later use during GC. */
2417 case R_386_GNU_VTINHERIT
:
2418 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
2422 /* This relocation describes which C++ vtable entries are actually
2423 used. Record for later use during GC. */
2424 case R_386_GNU_VTENTRY
:
2425 BFD_ASSERT (h
!= NULL
);
2427 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
2435 if (r_type
== R_386_GOT32X
2436 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
2437 sec
->need_convert_load
= 1;
2440 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2442 if (!info
->keep_memory
)
2446 /* Cache the section contents for elf_link_input_bfd. */
2447 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2454 if (elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2456 sec
->check_relocs_failed
= 1;
2460 /* Return the section that should be marked against GC for a given
2464 elf_i386_gc_mark_hook (asection
*sec
,
2465 struct bfd_link_info
*info
,
2466 Elf_Internal_Rela
*rel
,
2467 struct elf_link_hash_entry
*h
,
2468 Elf_Internal_Sym
*sym
)
2471 switch (ELF32_R_TYPE (rel
->r_info
))
2473 case R_386_GNU_VTINHERIT
:
2474 case R_386_GNU_VTENTRY
:
2478 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
2481 /* Remove undefined weak symbol from the dynamic symbol table if it
2482 is resolved to 0. */
2485 elf_i386_fixup_symbol (struct bfd_link_info
*info
,
2486 struct elf_link_hash_entry
*h
)
2488 if (h
->dynindx
!= -1
2489 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2490 elf_i386_hash_entry (h
)->has_got_reloc
,
2491 elf_i386_hash_entry (h
)))
2494 _bfd_elf_strtab_delref (elf_hash_table (info
)->dynstr
,
2500 /* Adjust a symbol defined by a dynamic object and referenced by a
2501 regular object. The current definition is in some section of the
2502 dynamic object, but we're not including those sections. We have to
2503 change the definition to something the rest of the link can
2507 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2508 struct elf_link_hash_entry
*h
)
2510 struct elf_i386_link_hash_table
*htab
;
2512 struct elf_i386_link_hash_entry
*eh
;
2513 struct elf_dyn_relocs
*p
;
2515 /* STT_GNU_IFUNC symbol must go through PLT. */
2516 if (h
->type
== STT_GNU_IFUNC
)
2518 /* All local STT_GNU_IFUNC references must be treate as local
2519 calls via local PLT. */
2521 && SYMBOL_CALLS_LOCAL (info
, h
))
2523 bfd_size_type pc_count
= 0, count
= 0;
2524 struct elf_dyn_relocs
**pp
;
2526 eh
= (struct elf_i386_link_hash_entry
*) h
;
2527 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2529 pc_count
+= p
->pc_count
;
2530 p
->count
-= p
->pc_count
;
2539 if (pc_count
|| count
)
2544 /* Increment PLT reference count only for PC-relative
2547 if (h
->plt
.refcount
<= 0)
2548 h
->plt
.refcount
= 1;
2550 h
->plt
.refcount
+= 1;
2555 if (h
->plt
.refcount
<= 0)
2557 h
->plt
.offset
= (bfd_vma
) -1;
2563 /* If this is a function, put it in the procedure linkage table. We
2564 will fill in the contents of the procedure linkage table later,
2565 when we know the address of the .got section. */
2566 if (h
->type
== STT_FUNC
2569 if (h
->plt
.refcount
<= 0
2570 || SYMBOL_CALLS_LOCAL (info
, h
)
2571 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2572 && h
->root
.type
== bfd_link_hash_undefweak
))
2574 /* This case can occur if we saw a PLT32 reloc in an input
2575 file, but the symbol was never referred to by a dynamic
2576 object, or if all references were garbage collected. In
2577 such a case, we don't actually need to build a procedure
2578 linkage table, and we can just do a PC32 reloc instead. */
2579 h
->plt
.offset
= (bfd_vma
) -1;
2586 /* It's possible that we incorrectly decided a .plt reloc was
2587 needed for an R_386_PC32 reloc to a non-function sym in
2588 check_relocs. We can't decide accurately between function and
2589 non-function syms in check-relocs; Objects loaded later in
2590 the link may change h->type. So fix it now. */
2591 h
->plt
.offset
= (bfd_vma
) -1;
2593 /* If this is a weak symbol, and there is a real definition, the
2594 processor independent code will have arranged for us to see the
2595 real definition first, and we can just use the same value. */
2596 if (h
->u
.weakdef
!= NULL
)
2598 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2599 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2600 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2601 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2602 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2603 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2607 /* This is a reference to a symbol defined by a dynamic object which
2608 is not a function. */
2610 /* If we are creating a shared library, we must presume that the
2611 only references to the symbol are via the global offset table.
2612 For such cases we need not do anything here; the relocations will
2613 be handled correctly by relocate_section. */
2614 if (!bfd_link_executable (info
))
2617 /* If there are no references to this symbol that do not use the
2618 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2620 eh
= (struct elf_i386_link_hash_entry
*) h
;
2621 if (!h
->non_got_ref
&& !eh
->gotoff_ref
)
2624 /* If -z nocopyreloc was given, we won't generate them either. */
2625 if (info
->nocopyreloc
)
2631 htab
= elf_i386_hash_table (info
);
2635 /* If there aren't any dynamic relocs in read-only sections nor
2636 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2637 avoid the copy reloc. This doesn't work on VxWorks, where we can
2638 not have dynamic relocations (other than copy and jump slot
2639 relocations) in an executable. */
2640 if (ELIMINATE_COPY_RELOCS
2642 && get_elf_i386_backend_data (info
->output_bfd
)->os
!= is_vxworks
)
2644 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2646 s
= p
->sec
->output_section
;
2647 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2658 /* We must allocate the symbol in our .dynbss section, which will
2659 become part of the .bss section of the executable. There will be
2660 an entry for this symbol in the .dynsym section. The dynamic
2661 object will contain position independent code, so all references
2662 from the dynamic object to this symbol will go through the global
2663 offset table. The dynamic linker will use the .dynsym entry to
2664 determine the address it must put in the global offset table, so
2665 both the dynamic object and the regular object will refer to the
2666 same memory location for the variable. */
2668 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2669 copy the initial value out of the dynamic object and into the
2670 runtime process image. */
2671 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
2673 s
= htab
->elf
.sdynrelro
;
2674 srel
= htab
->elf
.sreldynrelro
;
2678 s
= htab
->elf
.sdynbss
;
2679 srel
= htab
->elf
.srelbss
;
2681 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2683 srel
->size
+= sizeof (Elf32_External_Rel
);
2687 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
2690 /* Allocate space in .plt, .got and associated reloc sections for
2694 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2696 struct bfd_link_info
*info
;
2697 struct elf_i386_link_hash_table
*htab
;
2698 struct elf_i386_link_hash_entry
*eh
;
2699 struct elf_dyn_relocs
*p
;
2700 unsigned plt_entry_size
;
2701 bfd_boolean resolved_to_zero
;
2702 const struct elf_i386_backend_data
*bed
;
2704 if (h
->root
.type
== bfd_link_hash_indirect
)
2707 eh
= (struct elf_i386_link_hash_entry
*) h
;
2709 info
= (struct bfd_link_info
*) inf
;
2710 htab
= elf_i386_hash_table (info
);
2714 bed
= get_elf_i386_backend_data (info
->output_bfd
);
2716 plt_entry_size
= htab
->plt
.plt_entry_size
;
2718 resolved_to_zero
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
2722 /* Clear the reference count of function pointer relocations if
2723 symbol isn't a normal function. */
2724 if (h
->type
!= STT_FUNC
)
2725 eh
->func_pointer_refcount
= 0;
2727 /* We can't use the GOT PLT if pointer equality is needed since
2728 finish_dynamic_symbol won't clear symbol value and the dynamic
2729 linker won't update the GOT slot. We will get into an infinite
2730 loop at run-time. */
2731 if (htab
->plt_got
!= NULL
2732 && h
->type
!= STT_GNU_IFUNC
2733 && !h
->pointer_equality_needed
2734 && h
->plt
.refcount
> 0
2735 && h
->got
.refcount
> 0)
2737 /* Don't use the regular PLT if there are both GOT and GOTPLT
2739 h
->plt
.offset
= (bfd_vma
) -1;
2741 /* Use the GOT PLT. */
2742 eh
->plt_got
.refcount
= 1;
2745 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2746 here if it is defined and referenced in a non-shared object. */
2747 if (h
->type
== STT_GNU_IFUNC
2750 if (_bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2751 &htab
->readonly_dynrelocs_against_ifunc
,
2753 (htab
->plt
.has_plt0
*
2757 asection
*s
= htab
->plt_second
;
2758 if (h
->plt
.offset
!= (bfd_vma
) -1 && s
!= NULL
)
2760 /* Use the second PLT section if it is created. */
2761 eh
->plt_second
.offset
= s
->size
;
2763 /* Make room for this entry in the second PLT section. */
2764 s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2772 /* Don't create the PLT entry if there are only function pointer
2773 relocations which can be resolved at run-time. */
2774 else if (htab
->elf
.dynamic_sections_created
2775 && (h
->plt
.refcount
> eh
->func_pointer_refcount
2776 || eh
->plt_got
.refcount
> 0))
2778 bfd_boolean use_plt_got
= eh
->plt_got
.refcount
> 0;
2780 /* Clear the reference count of function pointer relocations
2782 eh
->func_pointer_refcount
= 0;
2784 /* Make sure this symbol is output as a dynamic symbol.
2785 Undefined weak syms won't yet be marked as dynamic. */
2786 if (h
->dynindx
== -1
2788 && !resolved_to_zero
2789 && h
->root
.type
== bfd_link_hash_undefweak
)
2791 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2795 if (bfd_link_pic (info
)
2796 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2798 asection
*s
= htab
->elf
.splt
;
2799 asection
*second_s
= htab
->plt_second
;
2800 asection
*got_s
= htab
->plt_got
;
2802 /* If this is the first .plt entry, make room for the special
2803 first entry. The .plt section is used by prelink to undo
2804 prelinking for dynamic relocations. */
2806 s
->size
= htab
->plt
.has_plt0
* plt_entry_size
;
2809 eh
->plt_got
.offset
= got_s
->size
;
2812 h
->plt
.offset
= s
->size
;
2814 eh
->plt_second
.offset
= second_s
->size
;
2817 /* If this symbol is not defined in a regular file, and we are
2818 not generating a shared library, then set the symbol to this
2819 location in the .plt. This is required to make function
2820 pointers compare as equal between the normal executable and
2821 the shared library. */
2822 if (! bfd_link_pic (info
)
2827 /* We need to make a call to the entry of the GOT PLT
2828 instead of regular PLT entry. */
2829 h
->root
.u
.def
.section
= got_s
;
2830 h
->root
.u
.def
.value
= eh
->plt_got
.offset
;
2836 /* We need to make a call to the entry of the
2837 second PLT instead of regular PLT entry. */
2838 h
->root
.u
.def
.section
= second_s
;
2839 h
->root
.u
.def
.value
= eh
->plt_second
.offset
;
2843 h
->root
.u
.def
.section
= s
;
2844 h
->root
.u
.def
.value
= h
->plt
.offset
;
2849 /* Make room for this entry. */
2851 got_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2854 s
->size
+= plt_entry_size
;
2856 second_s
->size
+= htab
->non_lazy_plt
->plt_entry_size
;
2858 /* We also need to make an entry in the .got.plt section,
2859 which will be placed in the .got section by the linker
2861 htab
->elf
.sgotplt
->size
+= 4;
2863 /* There should be no PLT relocation against resolved
2864 undefined weak symbol in executable. */
2865 if (!resolved_to_zero
)
2867 /* We also need to make an entry in the .rel.plt
2869 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2870 htab
->elf
.srelplt
->reloc_count
++;
2874 if (bed
->os
== is_vxworks
&& !bfd_link_pic (info
))
2876 /* VxWorks has a second set of relocations for each PLT entry
2877 in executables. They go in a separate relocation section,
2878 which is processed by the kernel loader. */
2880 /* There are two relocations for the initial PLT entry: an
2881 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2882 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2884 if (h
->plt
.offset
== plt_entry_size
)
2885 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2887 /* There are two extra relocations for each subsequent PLT entry:
2888 an R_386_32 relocation for the GOT entry, and an R_386_32
2889 relocation for the PLT entry. */
2891 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2896 eh
->plt_got
.offset
= (bfd_vma
) -1;
2897 h
->plt
.offset
= (bfd_vma
) -1;
2903 eh
->plt_got
.offset
= (bfd_vma
) -1;
2904 h
->plt
.offset
= (bfd_vma
) -1;
2908 eh
->tlsdesc_got
= (bfd_vma
) -1;
2910 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2911 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2912 if (h
->got
.refcount
> 0
2913 && bfd_link_executable (info
)
2915 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2916 h
->got
.offset
= (bfd_vma
) -1;
2917 else if (h
->got
.refcount
> 0)
2921 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2923 /* Make sure this symbol is output as a dynamic symbol.
2924 Undefined weak syms won't yet be marked as dynamic. */
2925 if (h
->dynindx
== -1
2927 && !resolved_to_zero
2928 && h
->root
.type
== bfd_link_hash_undefweak
)
2930 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2935 if (GOT_TLS_GDESC_P (tls_type
))
2937 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2938 - elf_i386_compute_jump_table_size (htab
);
2939 htab
->elf
.sgotplt
->size
+= 8;
2940 h
->got
.offset
= (bfd_vma
) -2;
2942 if (! GOT_TLS_GDESC_P (tls_type
)
2943 || GOT_TLS_GD_P (tls_type
))
2945 h
->got
.offset
= s
->size
;
2947 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2948 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2951 dyn
= htab
->elf
.dynamic_sections_created
;
2952 /* R_386_TLS_IE_32 needs one dynamic relocation,
2953 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2954 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2955 need two), R_386_TLS_GD needs one if local symbol and two if
2956 global. No dynamic relocation against resolved undefined weak
2957 symbol in executable. */
2958 if (tls_type
== GOT_TLS_IE_BOTH
)
2959 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2960 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2961 || (tls_type
& GOT_TLS_IE
))
2962 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2963 else if (GOT_TLS_GD_P (tls_type
))
2964 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2965 else if (! GOT_TLS_GDESC_P (tls_type
)
2966 && ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2967 && !resolved_to_zero
)
2968 || h
->root
.type
!= bfd_link_hash_undefweak
)
2969 && (bfd_link_pic (info
)
2970 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2971 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2972 if (GOT_TLS_GDESC_P (tls_type
))
2973 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2976 h
->got
.offset
= (bfd_vma
) -1;
2978 if (eh
->dyn_relocs
== NULL
)
2981 /* In the shared -Bsymbolic case, discard space allocated for
2982 dynamic pc-relative relocs against symbols which turn out to be
2983 defined in regular objects. For the normal shared case, discard
2984 space for pc-relative relocs that have become local due to symbol
2985 visibility changes. */
2987 if (bfd_link_pic (info
))
2989 /* The only reloc that uses pc_count is R_386_PC32, which will
2990 appear on a call or on something like ".long foo - .". We
2991 want calls to protected symbols to resolve directly to the
2992 function rather than going via the plt. If people want
2993 function pointer comparisons to work as expected then they
2994 should avoid writing assembly like ".long foo - .". */
2995 if (SYMBOL_CALLS_LOCAL (info
, h
))
2997 struct elf_dyn_relocs
**pp
;
2999 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3001 p
->count
-= p
->pc_count
;
3010 if (bed
->os
== is_vxworks
)
3012 struct elf_dyn_relocs
**pp
;
3013 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3015 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
3022 /* Also discard relocs on undefined weak syms with non-default
3023 visibility or in PIE. */
3024 if (eh
->dyn_relocs
!= NULL
3025 && h
->root
.type
== bfd_link_hash_undefweak
)
3027 /* Undefined weak symbol is never bound locally in shared
3029 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
3030 || resolved_to_zero
)
3034 /* Keep dynamic non-GOT/non-PLT relocation so that we
3035 can branch to 0 without PLT. */
3036 struct elf_dyn_relocs
**pp
;
3038 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
3039 if (p
->pc_count
== 0)
3043 /* Remove non-R_386_PC32 relocation. */
3044 p
->count
= p
->pc_count
;
3048 if (eh
->dyn_relocs
!= NULL
)
3050 /* Make sure undefined weak symbols are output
3051 as dynamic symbols in PIEs for dynamic non-GOT
3052 non-PLT reloations. */
3053 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3058 eh
->dyn_relocs
= NULL
;
3060 else if (h
->dynindx
== -1
3061 && !h
->forced_local
)
3063 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3068 else if (ELIMINATE_COPY_RELOCS
)
3070 /* For the non-shared case, discard space for relocs against
3071 symbols which turn out to need copy relocs or are not
3072 dynamic. Keep dynamic relocations for run-time function
3073 pointer initialization. */
3075 if ((!h
->non_got_ref
3076 || eh
->func_pointer_refcount
> 0
3077 || (h
->root
.type
== bfd_link_hash_undefweak
3078 && !resolved_to_zero
))
3081 || (htab
->elf
.dynamic_sections_created
3082 && (h
->root
.type
== bfd_link_hash_undefweak
3083 || h
->root
.type
== bfd_link_hash_undefined
))))
3085 /* Make sure this symbol is output as a dynamic symbol.
3086 Undefined weak syms won't yet be marked as dynamic. */
3087 if (h
->dynindx
== -1
3089 && !resolved_to_zero
3090 && h
->root
.type
== bfd_link_hash_undefweak
)
3092 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
3096 /* If that succeeded, we know we'll be keeping all the
3098 if (h
->dynindx
!= -1)
3102 eh
->dyn_relocs
= NULL
;
3103 eh
->func_pointer_refcount
= 0;
3108 /* Finally, allocate space. */
3109 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3113 sreloc
= elf_section_data (p
->sec
)->sreloc
;
3115 BFD_ASSERT (sreloc
!= NULL
);
3116 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3122 /* Allocate space in .plt, .got and associated reloc sections for
3123 local dynamic relocs. */
3126 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
3128 struct elf_link_hash_entry
*h
3129 = (struct elf_link_hash_entry
*) *slot
;
3131 if (h
->type
!= STT_GNU_IFUNC
3135 || h
->root
.type
!= bfd_link_hash_defined
)
3138 return elf_i386_allocate_dynrelocs (h
, inf
);
3141 /* Find any dynamic relocs that apply to read-only sections. */
3144 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
3146 struct elf_i386_link_hash_entry
*eh
;
3147 struct elf_dyn_relocs
*p
;
3149 /* Skip local IFUNC symbols. */
3150 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
3153 eh
= (struct elf_i386_link_hash_entry
*) h
;
3154 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
3156 asection
*s
= p
->sec
->output_section
;
3158 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
3160 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
3162 info
->flags
|= DF_TEXTREL
;
3164 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3165 || info
->error_textrel
)
3166 /* xgettext:c-format */
3167 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3168 p
->sec
->owner
, h
->root
.root
.string
,
3171 /* Not an error, just cut short the traversal. */
3178 /* Convert load via the GOT slot to load immediate. */
3181 elf_i386_convert_load (bfd
*abfd
, asection
*sec
,
3182 struct bfd_link_info
*link_info
)
3184 struct elf_i386_link_hash_table
*htab
;
3185 Elf_Internal_Shdr
*symtab_hdr
;
3186 Elf_Internal_Rela
*internal_relocs
;
3187 Elf_Internal_Rela
*irel
, *irelend
;
3189 bfd_boolean changed
;
3190 bfd_signed_vma
*local_got_refcounts
;
3192 /* Don't even try to convert non-ELF outputs. */
3193 if (!is_elf_hash_table (link_info
->hash
))
3196 /* Nothing to do if there is no need or no output. */
3197 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
3198 || sec
->need_convert_load
== 0
3199 || bfd_is_abs_section (sec
->output_section
))
3202 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
3204 /* Load the relocations for this section. */
3205 internal_relocs
= (_bfd_elf_link_read_relocs
3206 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
3207 link_info
->keep_memory
));
3208 if (internal_relocs
== NULL
)
3212 htab
= elf_i386_hash_table (link_info
);
3213 local_got_refcounts
= elf_local_got_refcounts (abfd
);
3215 /* Get the section contents. */
3216 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
3217 contents
= elf_section_data (sec
)->this_hdr
.contents
;
3220 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
3224 irelend
= internal_relocs
+ sec
->reloc_count
;
3225 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
3227 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
3228 unsigned int r_symndx
;
3229 struct elf_link_hash_entry
*h
;
3230 bfd_boolean converted
;
3232 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3233 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3234 if (r_type
!= R_386_GOT32X
)
3237 r_symndx
= ELF32_R_SYM (irel
->r_info
);
3238 if (r_symndx
< symtab_hdr
->sh_info
)
3239 h
= elf_i386_get_local_sym_hash (htab
, sec
->owner
,
3240 (const Elf_Internal_Rela
*) irel
,
3244 h
= elf_sym_hashes (abfd
)[r_symndx
- symtab_hdr
->sh_info
];
3245 while (h
->root
.type
== bfd_link_hash_indirect
3246 || h
->root
.type
== bfd_link_hash_warning
)
3247 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
3250 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3251 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
3255 if (!elf_i386_convert_load_reloc (abfd
, symtab_hdr
, contents
,
3256 irel
, h
, &converted
, link_info
))
3261 changed
= converted
;
3264 if (h
->got
.refcount
> 0)
3265 h
->got
.refcount
-= 1;
3269 if (local_got_refcounts
!= NULL
3270 && local_got_refcounts
[r_symndx
] > 0)
3271 local_got_refcounts
[r_symndx
] -= 1;
3276 if (contents
!= NULL
3277 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3279 if (!changed
&& !link_info
->keep_memory
)
3283 /* Cache the section contents for elf_link_input_bfd. */
3284 elf_section_data (sec
)->this_hdr
.contents
= contents
;
3288 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
3291 free (internal_relocs
);
3293 elf_section_data (sec
)->relocs
= internal_relocs
;
3299 if (contents
!= NULL
3300 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
3302 if (internal_relocs
!= NULL
3303 && elf_section_data (sec
)->relocs
!= internal_relocs
)
3304 free (internal_relocs
);
3308 /* Set the sizes of the dynamic sections. */
3311 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
3313 struct elf_i386_link_hash_table
*htab
;
3319 htab
= elf_i386_hash_table (info
);
3322 dynobj
= htab
->elf
.dynobj
;
3326 /* Set up .got offsets for local syms, and space for local dynamic
3328 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3330 bfd_signed_vma
*local_got
;
3331 bfd_signed_vma
*end_local_got
;
3332 char *local_tls_type
;
3333 bfd_vma
*local_tlsdesc_gotent
;
3334 bfd_size_type locsymcount
;
3335 Elf_Internal_Shdr
*symtab_hdr
;
3338 if (! is_i386_elf (ibfd
))
3341 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
3343 struct elf_dyn_relocs
*p
;
3345 if (!elf_i386_convert_load (ibfd
, s
, info
))
3348 for (p
= ((struct elf_dyn_relocs
*)
3349 elf_section_data (s
)->local_dynrel
);
3353 if (!bfd_is_abs_section (p
->sec
)
3354 && bfd_is_abs_section (p
->sec
->output_section
))
3356 /* Input section has been discarded, either because
3357 it is a copy of a linkonce section or due to
3358 linker script /DISCARD/, so we'll be discarding
3361 else if ((get_elf_i386_backend_data (output_bfd
)->os
3363 && strcmp (p
->sec
->output_section
->name
,
3366 /* Relocations in vxworks .tls_vars sections are
3367 handled specially by the loader. */
3369 else if (p
->count
!= 0)
3371 srel
= elf_section_data (p
->sec
)->sreloc
;
3372 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
3373 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
3374 && (info
->flags
& DF_TEXTREL
) == 0)
3376 info
->flags
|= DF_TEXTREL
;
3377 if ((info
->warn_shared_textrel
&& bfd_link_pic (info
))
3378 || info
->error_textrel
)
3379 /* xgettext:c-format */
3380 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3381 p
->sec
->owner
, p
->sec
);
3387 local_got
= elf_local_got_refcounts (ibfd
);
3391 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3392 locsymcount
= symtab_hdr
->sh_info
;
3393 end_local_got
= local_got
+ locsymcount
;
3394 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
3395 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
3397 srel
= htab
->elf
.srelgot
;
3398 for (; local_got
< end_local_got
;
3399 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
3401 *local_tlsdesc_gotent
= (bfd_vma
) -1;
3404 if (GOT_TLS_GDESC_P (*local_tls_type
))
3406 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
3407 - elf_i386_compute_jump_table_size (htab
);
3408 htab
->elf
.sgotplt
->size
+= 8;
3409 *local_got
= (bfd_vma
) -2;
3411 if (! GOT_TLS_GDESC_P (*local_tls_type
)
3412 || GOT_TLS_GD_P (*local_tls_type
))
3414 *local_got
= s
->size
;
3416 if (GOT_TLS_GD_P (*local_tls_type
)
3417 || *local_tls_type
== GOT_TLS_IE_BOTH
)
3420 if (bfd_link_pic (info
)
3421 || GOT_TLS_GD_ANY_P (*local_tls_type
)
3422 || (*local_tls_type
& GOT_TLS_IE
))
3424 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
3425 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
3426 else if (GOT_TLS_GD_P (*local_tls_type
)
3427 || ! GOT_TLS_GDESC_P (*local_tls_type
))
3428 srel
->size
+= sizeof (Elf32_External_Rel
);
3429 if (GOT_TLS_GDESC_P (*local_tls_type
))
3430 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
3434 *local_got
= (bfd_vma
) -1;
3438 if (htab
->tls_ldm_got
.refcount
> 0)
3440 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3442 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
3443 htab
->elf
.sgot
->size
+= 8;
3444 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
3447 htab
->tls_ldm_got
.offset
= -1;
3449 /* Allocate global sym .plt and .got entries, and space for global
3450 sym dynamic relocs. */
3451 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
3453 /* Allocate .plt and .got entries, and space for local symbols. */
3454 htab_traverse (htab
->loc_hash_table
,
3455 elf_i386_allocate_local_dynrelocs
,
3458 /* For every jump slot reserved in the sgotplt, reloc_count is
3459 incremented. However, when we reserve space for TLS descriptors,
3460 it's not incremented, so in order to compute the space reserved
3461 for them, it suffices to multiply the reloc count by the jump
3464 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3465 so that R_386_IRELATIVE entries come last. */
3466 if (htab
->elf
.srelplt
)
3468 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
3469 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
3470 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
3472 else if (htab
->elf
.irelplt
)
3473 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
3476 if (htab
->elf
.sgotplt
)
3478 /* Don't allocate .got.plt section if there are no GOT nor PLT
3479 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3480 if ((htab
->elf
.hgot
== NULL
3481 || !htab
->elf
.hgot
->ref_regular_nonweak
)
3482 && (htab
->elf
.sgotplt
->size
3483 == get_elf_backend_data (output_bfd
)->got_header_size
)
3484 && (htab
->elf
.splt
== NULL
3485 || htab
->elf
.splt
->size
== 0)
3486 && (htab
->elf
.sgot
== NULL
3487 || htab
->elf
.sgot
->size
== 0)
3488 && (htab
->elf
.iplt
== NULL
3489 || htab
->elf
.iplt
->size
== 0)
3490 && (htab
->elf
.igotplt
== NULL
3491 || htab
->elf
.igotplt
->size
== 0))
3492 htab
->elf
.sgotplt
->size
= 0;
3495 if (_bfd_elf_eh_frame_present (info
))
3497 if (htab
->plt_eh_frame
!= NULL
3498 && htab
->elf
.splt
!= NULL
3499 && htab
->elf
.splt
->size
!= 0
3500 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
))
3501 htab
->plt_eh_frame
->size
= htab
->plt
.eh_frame_plt_size
;
3503 if (htab
->plt_got_eh_frame
!= NULL
3504 && htab
->plt_got
!= NULL
3505 && htab
->plt_got
->size
!= 0
3506 && !bfd_is_abs_section (htab
->plt_got
->output_section
))
3507 htab
->plt_got_eh_frame
->size
3508 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3510 /* Unwind info for the second PLT and .plt.got sections are
3512 if (htab
->plt_second_eh_frame
!= NULL
3513 && htab
->plt_second
!= NULL
3514 && htab
->plt_second
->size
!= 0
3515 && !bfd_is_abs_section (htab
->plt_second
->output_section
))
3516 htab
->plt_second_eh_frame
->size
3517 = htab
->non_lazy_plt
->eh_frame_plt_size
;
3520 /* We now have determined the sizes of the various dynamic sections.
3521 Allocate memory for them. */
3523 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
3525 bfd_boolean strip_section
= TRUE
;
3527 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
3530 if (s
== htab
->elf
.splt
3531 || s
== htab
->elf
.sgot
)
3533 /* Strip this section if we don't need it; see the
3535 /* We'd like to strip these sections if they aren't needed, but if
3536 we've exported dynamic symbols from them we must leave them.
3537 It's too late to tell BFD to get rid of the symbols. */
3539 if (htab
->elf
.hplt
!= NULL
)
3540 strip_section
= FALSE
;
3542 else if (s
== htab
->elf
.sgotplt
3543 || s
== htab
->elf
.iplt
3544 || s
== htab
->elf
.igotplt
3545 || s
== htab
->plt_second
3546 || s
== htab
->plt_got
3547 || s
== htab
->plt_eh_frame
3548 || s
== htab
->plt_got_eh_frame
3549 || s
== htab
->plt_second_eh_frame
3550 || s
== htab
->elf
.sdynbss
3551 || s
== htab
->elf
.sdynrelro
)
3553 /* Strip these too. */
3555 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
3558 && s
!= htab
->elf
.srelplt
3559 && s
!= htab
->srelplt2
)
3562 /* We use the reloc_count field as a counter if we need
3563 to copy relocs into the output file. */
3568 /* It's not one of our sections, so don't allocate space. */
3574 /* If we don't need this section, strip it from the
3575 output file. This is mostly to handle .rel.bss and
3576 .rel.plt. We must create both sections in
3577 create_dynamic_sections, because they must be created
3578 before the linker maps input sections to output
3579 sections. The linker does that before
3580 adjust_dynamic_symbol is called, and it is that
3581 function which decides whether anything needs to go
3582 into these sections. */
3584 s
->flags
|= SEC_EXCLUDE
;
3588 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
3591 /* Allocate memory for the section contents. We use bfd_zalloc
3592 here in case unused entries are not reclaimed before the
3593 section's contents are written out. This should not happen,
3594 but this way if it does, we get a R_386_NONE reloc instead
3596 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
3597 if (s
->contents
== NULL
)
3601 if (htab
->plt_eh_frame
!= NULL
3602 && htab
->plt_eh_frame
->contents
!= NULL
)
3604 memcpy (htab
->plt_eh_frame
->contents
,
3605 htab
->plt
.eh_frame_plt
,
3606 htab
->plt_eh_frame
->size
);
3607 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
3608 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
3611 if (htab
->plt_got_eh_frame
!= NULL
3612 && htab
->plt_got_eh_frame
->contents
!= NULL
)
3614 memcpy (htab
->plt_got_eh_frame
->contents
,
3615 htab
->non_lazy_plt
->eh_frame_plt
,
3616 htab
->plt_got_eh_frame
->size
);
3617 bfd_put_32 (dynobj
, htab
->plt_got
->size
,
3618 (htab
->plt_got_eh_frame
->contents
3619 + PLT_FDE_LEN_OFFSET
));
3622 if (htab
->plt_second_eh_frame
!= NULL
3623 && htab
->plt_second_eh_frame
->contents
!= NULL
)
3625 memcpy (htab
->plt_second_eh_frame
->contents
,
3626 htab
->non_lazy_plt
->eh_frame_plt
,
3627 htab
->plt_second_eh_frame
->size
);
3628 bfd_put_32 (dynobj
, htab
->plt_second
->size
,
3629 (htab
->plt_second_eh_frame
->contents
3630 + PLT_FDE_LEN_OFFSET
));
3633 if (htab
->elf
.dynamic_sections_created
)
3635 /* Add some entries to the .dynamic section. We fill in the
3636 values later, in elf_i386_finish_dynamic_sections, but we
3637 must add the entries now so that we get the correct size for
3638 the .dynamic section. The DT_DEBUG entry is filled in by the
3639 dynamic linker and used by the debugger. */
3640 #define add_dynamic_entry(TAG, VAL) \
3641 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3643 if (bfd_link_executable (info
))
3645 if (!add_dynamic_entry (DT_DEBUG
, 0))
3649 if (htab
->elf
.splt
->size
!= 0)
3651 /* DT_PLTGOT is used by prelink even if there is no PLT
3653 if (!add_dynamic_entry (DT_PLTGOT
, 0))
3657 if (htab
->elf
.srelplt
->size
!= 0)
3659 if (!add_dynamic_entry (DT_PLTRELSZ
, 0)
3660 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
3661 || !add_dynamic_entry (DT_JMPREL
, 0))
3667 if (!add_dynamic_entry (DT_REL
, 0)
3668 || !add_dynamic_entry (DT_RELSZ
, 0)
3669 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3672 /* If any dynamic relocs apply to a read-only section,
3673 then we need a DT_TEXTREL entry. */
3674 if ((info
->flags
& DF_TEXTREL
) == 0)
3675 elf_link_hash_traverse (&htab
->elf
,
3676 elf_i386_readonly_dynrelocs
, info
);
3678 if ((info
->flags
& DF_TEXTREL
) != 0)
3680 if (htab
->readonly_dynrelocs_against_ifunc
)
3682 info
->callbacks
->einfo
3683 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3684 bfd_set_error (bfd_error_bad_value
);
3688 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3692 if (get_elf_i386_backend_data (output_bfd
)->os
== is_vxworks
3693 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3696 #undef add_dynamic_entry
3702 elf_i386_always_size_sections (bfd
*output_bfd
,
3703 struct bfd_link_info
*info
)
3705 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3709 struct elf_link_hash_entry
*tlsbase
;
3711 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3712 "_TLS_MODULE_BASE_",
3713 FALSE
, FALSE
, FALSE
);
3715 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3717 struct elf_i386_link_hash_table
*htab
;
3718 struct bfd_link_hash_entry
*bh
= NULL
;
3719 const struct elf_backend_data
*bed
3720 = get_elf_backend_data (output_bfd
);
3722 htab
= elf_i386_hash_table (info
);
3726 if (!(_bfd_generic_link_add_one_symbol
3727 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3728 tls_sec
, 0, NULL
, FALSE
,
3729 bed
->collect
, &bh
)))
3732 htab
->tls_module_base
= bh
;
3734 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3735 tlsbase
->def_regular
= 1;
3736 tlsbase
->other
= STV_HIDDEN
;
3737 tlsbase
->root
.linker_def
= 1;
3738 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3745 /* Set the correct type for an x86 ELF section. We do this by the
3746 section name, which is a hack, but ought to work. */
3749 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3750 Elf_Internal_Shdr
*hdr
,
3755 name
= bfd_get_section_name (abfd
, sec
);
3757 /* This is an ugly, but unfortunately necessary hack that is
3758 needed when producing EFI binaries on x86. It tells
3759 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3760 containing ELF relocation info. We need this hack in order to
3761 be able to generate ELF binaries that can be translated into
3762 EFI applications (which are essentially COFF objects). Those
3763 files contain a COFF ".reloc" section inside an ELFNN object,
3764 which would normally cause BFD to segfault because it would
3765 attempt to interpret this section as containing relocation
3766 entries for section "oc". With this hack enabled, ".reloc"
3767 will be treated as a normal data section, which will avoid the
3768 segfault. However, you won't be able to create an ELFNN binary
3769 with a section named "oc" that needs relocations, but that's
3770 the kind of ugly side-effects you get when detecting section
3771 types based on their names... In practice, this limitation is
3772 unlikely to bite. */
3773 if (strcmp (name
, ".reloc") == 0)
3774 hdr
->sh_type
= SHT_PROGBITS
;
3779 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3780 executables. Rather than setting it to the beginning of the TLS
3781 section, we have to set it to the end. This function may be called
3782 multiple times, it is idempotent. */
3785 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3787 struct elf_i386_link_hash_table
*htab
;
3788 struct bfd_link_hash_entry
*base
;
3790 if (!bfd_link_executable (info
))
3793 htab
= elf_i386_hash_table (info
);
3797 base
= htab
->tls_module_base
;
3801 base
->u
.def
.value
= htab
->elf
.tls_size
;
3804 /* Return the base VMA address which should be subtracted from real addresses
3805 when resolving @dtpoff relocation.
3806 This is PT_TLS segment p_vaddr. */
3809 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3811 /* If tls_sec is NULL, we should have signalled an error already. */
3812 if (elf_hash_table (info
)->tls_sec
== NULL
)
3814 return elf_hash_table (info
)->tls_sec
->vma
;
3817 /* Return the relocation value for @tpoff relocation
3818 if STT_TLS virtual address is ADDRESS. */
3821 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3823 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3824 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3825 bfd_vma static_tls_size
;
3827 /* If tls_sec is NULL, we should have signalled an error already. */
3828 if (htab
->tls_sec
== NULL
)
3831 /* Consider special static TLS alignment requirements. */
3832 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3833 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3836 /* Relocate an i386 ELF section. */
3839 elf_i386_relocate_section (bfd
*output_bfd
,
3840 struct bfd_link_info
*info
,
3842 asection
*input_section
,
3844 Elf_Internal_Rela
*relocs
,
3845 Elf_Internal_Sym
*local_syms
,
3846 asection
**local_sections
)
3848 struct elf_i386_link_hash_table
*htab
;
3849 Elf_Internal_Shdr
*symtab_hdr
;
3850 struct elf_link_hash_entry
**sym_hashes
;
3851 bfd_vma
*local_got_offsets
;
3852 bfd_vma
*local_tlsdesc_gotents
;
3853 Elf_Internal_Rela
*rel
;
3854 Elf_Internal_Rela
*wrel
;
3855 Elf_Internal_Rela
*relend
;
3856 bfd_boolean is_vxworks_tls
;
3857 unsigned plt_entry_size
;
3859 BFD_ASSERT (is_i386_elf (input_bfd
));
3861 /* Skip if check_relocs failed. */
3862 if (input_section
->check_relocs_failed
)
3865 htab
= elf_i386_hash_table (info
);
3868 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3869 sym_hashes
= elf_sym_hashes (input_bfd
);
3870 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3871 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3872 /* We have to handle relocations in vxworks .tls_vars sections
3873 specially, because the dynamic loader is 'weird'. */
3874 is_vxworks_tls
= ((get_elf_i386_backend_data (output_bfd
)->os
3876 && bfd_link_pic (info
)
3877 && !strcmp (input_section
->output_section
->name
,
3880 elf_i386_set_tls_module_base (info
);
3882 plt_entry_size
= htab
->plt
.plt_entry_size
;
3884 rel
= wrel
= relocs
;
3885 relend
= relocs
+ input_section
->reloc_count
;
3886 for (; rel
< relend
; wrel
++, rel
++)
3888 unsigned int r_type
;
3889 reloc_howto_type
*howto
;
3890 unsigned long r_symndx
;
3891 struct elf_link_hash_entry
*h
;
3892 struct elf_i386_link_hash_entry
*eh
;
3893 Elf_Internal_Sym
*sym
;
3895 bfd_vma off
, offplt
, plt_offset
;
3897 bfd_boolean unresolved_reloc
;
3898 bfd_reloc_status_type r
;
3902 asection
*resolved_plt
;
3903 bfd_boolean resolved_to_zero
;
3904 bfd_boolean relative_reloc
;
3906 r_type
= ELF32_R_TYPE (rel
->r_info
);
3907 if (r_type
== R_386_GNU_VTINHERIT
3908 || r_type
== R_386_GNU_VTENTRY
)
3915 if ((indx
= r_type
) >= R_386_standard
3916 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3917 >= R_386_ext
- R_386_standard
)
3918 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3919 >= R_386_ext2
- R_386_ext
))
3920 return _bfd_unrecognized_reloc (input_bfd
, input_section
, r_type
);
3922 howto
= elf_howto_table
+ indx
;
3924 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3928 unresolved_reloc
= FALSE
;
3929 if (r_symndx
< symtab_hdr
->sh_info
)
3931 sym
= local_syms
+ r_symndx
;
3932 sec
= local_sections
[r_symndx
];
3933 relocation
= (sec
->output_section
->vma
3934 + sec
->output_offset
3936 st_size
= sym
->st_size
;
3938 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3939 && ((sec
->flags
& SEC_MERGE
) != 0
3940 || (bfd_link_relocatable (info
)
3941 && sec
->output_offset
!= 0)))
3944 bfd_byte
*where
= contents
+ rel
->r_offset
;
3946 switch (howto
->size
)
3949 addend
= bfd_get_8 (input_bfd
, where
);
3950 if (howto
->pc_relative
)
3952 addend
= (addend
^ 0x80) - 0x80;
3957 addend
= bfd_get_16 (input_bfd
, where
);
3958 if (howto
->pc_relative
)
3960 addend
= (addend
^ 0x8000) - 0x8000;
3965 addend
= bfd_get_32 (input_bfd
, where
);
3966 if (howto
->pc_relative
)
3968 addend
= (addend
^ 0x80000000) - 0x80000000;
3976 if (bfd_link_relocatable (info
))
3977 addend
+= sec
->output_offset
;
3980 asection
*msec
= sec
;
3981 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3983 addend
-= relocation
;
3984 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3987 switch (howto
->size
)
3990 /* FIXME: overflow checks. */
3991 if (howto
->pc_relative
)
3993 bfd_put_8 (input_bfd
, addend
, where
);
3996 if (howto
->pc_relative
)
3998 bfd_put_16 (input_bfd
, addend
, where
);
4001 if (howto
->pc_relative
)
4003 bfd_put_32 (input_bfd
, addend
, where
);
4007 else if (!bfd_link_relocatable (info
)
4008 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4010 /* Relocate against local STT_GNU_IFUNC symbol. */
4011 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
4016 /* Set STT_GNU_IFUNC symbol value. */
4017 h
->root
.u
.def
.value
= sym
->st_value
;
4018 h
->root
.u
.def
.section
= sec
;
4023 bfd_boolean warned ATTRIBUTE_UNUSED
;
4024 bfd_boolean ignored ATTRIBUTE_UNUSED
;
4026 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
4027 r_symndx
, symtab_hdr
, sym_hashes
,
4029 unresolved_reloc
, warned
, ignored
);
4033 if (sec
!= NULL
&& discarded_section (sec
))
4035 _bfd_clear_contents (howto
, input_bfd
, input_section
,
4036 contents
+ rel
->r_offset
);
4037 wrel
->r_offset
= rel
->r_offset
;
4041 /* For ld -r, remove relocations in debug sections against
4042 sections defined in discarded sections. Not done for
4043 eh_frame editing code expects to be present. */
4044 if (bfd_link_relocatable (info
)
4045 && (input_section
->flags
& SEC_DEBUGGING
))
4051 if (bfd_link_relocatable (info
))
4058 eh
= (struct elf_i386_link_hash_entry
*) h
;
4060 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
4061 it here if it is defined in a non-shared object. */
4063 && h
->type
== STT_GNU_IFUNC
4066 asection
*gotplt
, *base_got
;
4070 if ((input_section
->flags
& SEC_ALLOC
) == 0)
4072 /* Dynamic relocs are not propagated for SEC_DEBUGGING
4073 sections because such sections are not SEC_ALLOC and
4074 thus ld.so will not process them. */
4075 if ((input_section
->flags
& SEC_DEBUGGING
) != 0)
4080 /* STT_GNU_IFUNC symbol must go through PLT. */
4081 if (htab
->elf
.splt
!= NULL
)
4083 if (htab
->plt_second
!= NULL
)
4085 resolved_plt
= htab
->plt_second
;
4086 plt_offset
= eh
->plt_second
.offset
;
4090 resolved_plt
= htab
->elf
.splt
;
4091 plt_offset
= h
->plt
.offset
;
4093 gotplt
= htab
->elf
.sgotplt
;
4097 resolved_plt
= htab
->elf
.iplt
;
4098 plt_offset
= h
->plt
.offset
;
4099 gotplt
= htab
->elf
.igotplt
;
4109 base_got
= htab
->elf
.sgot
;
4110 off
= h
->got
.offset
;
4112 if (base_got
== NULL
)
4115 if (off
== (bfd_vma
) -1)
4117 /* We can't use h->got.offset here to save state, or
4118 even just remember the offset, as finish_dynamic_symbol
4119 would use that as offset into .got. */
4121 if (h
->plt
.offset
== (bfd_vma
) -1)
4124 if (htab
->elf
.splt
!= NULL
)
4126 plt_index
= (h
->plt
.offset
/ plt_entry_size
4127 - htab
->plt
.has_plt0
);
4128 off
= (plt_index
+ 3) * 4;
4129 base_got
= htab
->elf
.sgotplt
;
4133 plt_index
= h
->plt
.offset
/ plt_entry_size
;
4134 off
= plt_index
* 4;
4135 base_got
= htab
->elf
.igotplt
;
4138 if (h
->dynindx
== -1
4142 /* This references the local defitionion. We must
4143 initialize this entry in the global offset table.
4144 Since the offset must always be a multiple of 8,
4145 we use the least significant bit to record
4146 whether we have initialized it already.
4148 When doing a dynamic link, we create a .rela.got
4149 relocation entry to initialize the value. This
4150 is done in the finish_dynamic_symbol routine. */
4155 bfd_put_32 (output_bfd
, relocation
,
4156 base_got
->contents
+ off
);
4164 relocation
= (base_got
->output_section
->vma
4165 + base_got
->output_offset
+ off
4166 - gotplt
->output_section
->vma
4167 - gotplt
->output_offset
);
4169 if (rel
->r_offset
> 1
4170 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4171 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4173 if (bfd_link_pic (info
))
4174 goto disallow_got32
;
4176 /* Add the GOT base if there is no base register. */
4177 relocation
+= (gotplt
->output_section
->vma
4178 + gotplt
->output_offset
);
4180 else if (htab
->elf
.splt
== NULL
)
4182 /* Adjust for static executables. */
4183 relocation
+= gotplt
->output_offset
;
4189 if (h
->plt
.offset
== (bfd_vma
) -1)
4191 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4192 if (r_type
== R_386_32
4193 && (input_section
->flags
& SEC_CODE
) == 0)
4194 goto do_ifunc_pointer
;
4195 goto bad_ifunc_reloc
;
4198 relocation
= (resolved_plt
->output_section
->vma
4199 + resolved_plt
->output_offset
+ plt_offset
);
4205 if (h
->root
.root
.string
)
4206 name
= h
->root
.root
.string
;
4208 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4211 /* xgettext:c-format */
4212 (_("%B: relocation %s against STT_GNU_IFUNC "
4213 "symbol `%s' isn't supported"), input_bfd
,
4215 bfd_set_error (bfd_error_bad_value
);
4219 /* Generate dynamic relcoation only when there is a
4220 non-GOT reference in a shared object. */
4221 if ((bfd_link_pic (info
) && h
->non_got_ref
)
4222 || h
->plt
.offset
== (bfd_vma
) -1)
4224 Elf_Internal_Rela outrel
;
4229 /* Need a dynamic relocation to get the real function
4231 offset
= _bfd_elf_section_offset (output_bfd
,
4235 if (offset
== (bfd_vma
) -1
4236 || offset
== (bfd_vma
) -2)
4239 outrel
.r_offset
= (input_section
->output_section
->vma
4240 + input_section
->output_offset
4243 if (h
->dynindx
== -1
4245 || bfd_link_executable (info
))
4247 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
4248 h
->root
.root
.string
,
4249 h
->root
.u
.def
.section
->owner
);
4251 /* This symbol is resolved locally. */
4252 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4253 bfd_put_32 (output_bfd
,
4254 (h
->root
.u
.def
.value
4255 + h
->root
.u
.def
.section
->output_section
->vma
4256 + h
->root
.u
.def
.section
->output_offset
),
4260 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4262 /* Dynamic relocations are stored in
4263 1. .rel.ifunc section in PIC object.
4264 2. .rel.got section in dynamic executable.
4265 3. .rel.iplt section in static executable. */
4266 if (bfd_link_pic (info
))
4267 sreloc
= htab
->elf
.irelifunc
;
4268 else if (htab
->elf
.splt
!= NULL
)
4269 sreloc
= htab
->elf
.srelgot
;
4271 sreloc
= htab
->elf
.irelplt
;
4272 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4274 /* If this reloc is against an external symbol, we
4275 do not want to fiddle with the addend. Otherwise,
4276 we need to include the symbol value so that it
4277 becomes an addend for the dynamic reloc. For an
4278 internal symbol, we have updated addend. */
4287 relocation
-= (gotplt
->output_section
->vma
4288 + gotplt
->output_offset
);
4293 resolved_to_zero
= (eh
!= NULL
4294 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
4301 /* Avoid optimizing _DYNAMIC since ld.so may use its
4302 link-time address. */
4303 if (h
== htab
->elf
.hdynamic
)
4306 if (bfd_link_pic (info
))
4308 /* It is OK to convert mov to lea and convert indirect
4309 branch to direct branch. It is OK to convert adc,
4310 add, and, cmp, or, sbb, sub, test, xor only when PIC
4312 unsigned int opcode
, addend
;
4313 addend
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
4316 opcode
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4317 if (opcode
!= 0x8b && opcode
!= 0xff)
4321 /* Resolve "mov GOT[(%reg)], %reg",
4322 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4323 and "binop foo@GOT[(%reg)], %reg". */
4325 || (h
->plt
.offset
== (bfd_vma
) -1
4326 && h
->got
.offset
== (bfd_vma
) -1)
4327 || htab
->elf
.sgotplt
== NULL
)
4330 offplt
= (htab
->elf
.sgotplt
->output_section
->vma
4331 + htab
->elf
.sgotplt
->output_offset
);
4333 /* It is relative to .got.plt section. */
4334 if (h
->got
.offset
!= (bfd_vma
) -1)
4335 /* Use GOT entry. Mask off the least significant bit in
4336 GOT offset which may be set by R_386_GOT32 processing
4338 relocation
= (htab
->elf
.sgot
->output_section
->vma
4339 + htab
->elf
.sgot
->output_offset
4340 + (h
->got
.offset
& ~1) - offplt
);
4342 /* Use GOTPLT entry. */
4343 relocation
= (h
->plt
.offset
/ plt_entry_size
4344 - htab
->plt
.has_plt0
+ 3) * 4;
4346 if (!bfd_link_pic (info
))
4348 /* If not PIC, add the .got.plt section address for
4349 baseless addressing. */
4351 modrm
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4352 if ((modrm
& 0xc7) == 0x5)
4353 relocation
+= offplt
;
4356 unresolved_reloc
= FALSE
;
4361 /* Relocation is to the entry for this symbol in the global
4363 if (htab
->elf
.sgot
== NULL
)
4366 relative_reloc
= FALSE
;
4371 off
= h
->got
.offset
;
4372 dyn
= htab
->elf
.dynamic_sections_created
;
4373 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
4374 bfd_link_pic (info
),
4376 || (bfd_link_pic (info
)
4377 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4378 || (ELF_ST_VISIBILITY (h
->other
)
4379 && h
->root
.type
== bfd_link_hash_undefweak
))
4381 /* This is actually a static link, or it is a
4382 -Bsymbolic link and the symbol is defined
4383 locally, or the symbol was forced to be local
4384 because of a version file. We must initialize
4385 this entry in the global offset table. Since the
4386 offset must always be a multiple of 4, we use the
4387 least significant bit to record whether we have
4388 initialized it already.
4390 When doing a dynamic link, we create a .rel.got
4391 relocation entry to initialize the value. This
4392 is done in the finish_dynamic_symbol routine. */
4397 bfd_put_32 (output_bfd
, relocation
,
4398 htab
->elf
.sgot
->contents
+ off
);
4401 if (h
->dynindx
== -1
4403 && h
->root
.type
!= bfd_link_hash_undefweak
4404 && bfd_link_pic (info
))
4406 /* PR ld/21402: If this symbol isn't dynamic
4407 in PIC, generate R_386_RELATIVE here. */
4408 eh
->no_finish_dynamic_symbol
= 1;
4409 relative_reloc
= TRUE
;
4414 unresolved_reloc
= FALSE
;
4418 if (local_got_offsets
== NULL
)
4421 off
= local_got_offsets
[r_symndx
];
4423 /* The offset must always be a multiple of 4. We use
4424 the least significant bit to record whether we have
4425 already generated the necessary reloc. */
4430 bfd_put_32 (output_bfd
, relocation
,
4431 htab
->elf
.sgot
->contents
+ off
);
4432 local_got_offsets
[r_symndx
] |= 1;
4434 if (bfd_link_pic (info
))
4435 relative_reloc
= TRUE
;
4442 Elf_Internal_Rela outrel
;
4444 s
= htab
->elf
.srelgot
;
4448 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4449 + htab
->elf
.sgot
->output_offset
4451 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4452 elf_append_rel (output_bfd
, s
, &outrel
);
4455 if (off
>= (bfd_vma
) -2)
4458 relocation
= (htab
->elf
.sgot
->output_section
->vma
4459 + htab
->elf
.sgot
->output_offset
+ off
);
4460 if (rel
->r_offset
> 1
4461 && (*(contents
+ rel
->r_offset
- 1) & 0xc7) == 0x5
4462 && *(contents
+ rel
->r_offset
- 2) != 0x8d)
4464 if (bfd_link_pic (info
))
4466 /* For PIC, disallow R_386_GOT32 without a base
4467 register, except for "lea foo@GOT, %reg", since
4468 we don't know what the GOT base is. */
4472 if (h
== NULL
|| h
->root
.root
.string
== NULL
)
4473 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
4476 name
= h
->root
.root
.string
;
4479 /* xgettext:c-format */
4480 (_("%B: direct GOT relocation %s against `%s'"
4481 " without base register can not be used"
4482 " when making a shared object"),
4483 input_bfd
, howto
->name
, name
);
4484 bfd_set_error (bfd_error_bad_value
);
4490 /* Subtract the .got.plt section address only with a base
4492 relocation
-= (htab
->elf
.sgotplt
->output_section
->vma
4493 + htab
->elf
.sgotplt
->output_offset
);
4499 /* Relocation is relative to the start of the global offset
4502 /* Check to make sure it isn't a protected function or data
4503 symbol for shared library since it may not be local when
4504 used as function address or with copy relocation. We also
4505 need to make sure that a symbol is referenced locally. */
4506 if (!bfd_link_executable (info
) && h
)
4508 if (!h
->def_regular
)
4512 switch (ELF_ST_VISIBILITY (h
->other
))
4515 v
= _("hidden symbol");
4518 v
= _("internal symbol");
4521 v
= _("protected symbol");
4529 /* xgettext:c-format */
4530 (_("%B: relocation R_386_GOTOFF against undefined %s"
4531 " `%s' can not be used when making a shared object"),
4532 input_bfd
, v
, h
->root
.root
.string
);
4533 bfd_set_error (bfd_error_bad_value
);
4536 else if (!SYMBOL_REFERENCES_LOCAL (info
, h
)
4537 && (h
->type
== STT_FUNC
4538 || h
->type
== STT_OBJECT
)
4539 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
4542 /* xgettext:c-format */
4543 (_("%B: relocation R_386_GOTOFF against protected %s"
4544 " `%s' can not be used when making a shared object"),
4546 h
->type
== STT_FUNC
? "function" : "data",
4547 h
->root
.root
.string
);
4548 bfd_set_error (bfd_error_bad_value
);
4553 /* Note that sgot is not involved in this
4554 calculation. We always want the start of .got.plt. If we
4555 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4556 permitted by the ABI, we might have to change this
4558 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
4559 + htab
->elf
.sgotplt
->output_offset
;
4563 /* Use global offset table as symbol value. */
4564 relocation
= htab
->elf
.sgotplt
->output_section
->vma
4565 + htab
->elf
.sgotplt
->output_offset
;
4566 unresolved_reloc
= FALSE
;
4570 /* Relocation is to the entry for this symbol in the
4571 procedure linkage table. */
4573 /* Resolve a PLT32 reloc against a local symbol directly,
4574 without using the procedure linkage table. */
4578 if ((h
->plt
.offset
== (bfd_vma
) -1
4579 && eh
->plt_got
.offset
== (bfd_vma
) -1)
4580 || htab
->elf
.splt
== NULL
)
4582 /* We didn't make a PLT entry for this symbol. This
4583 happens when statically linking PIC code, or when
4584 using -Bsymbolic. */
4588 if (h
->plt
.offset
!= (bfd_vma
) -1)
4590 if (htab
->plt_second
!= NULL
)
4592 resolved_plt
= htab
->plt_second
;
4593 plt_offset
= eh
->plt_second
.offset
;
4597 resolved_plt
= htab
->elf
.splt
;
4598 plt_offset
= h
->plt
.offset
;
4603 resolved_plt
= htab
->plt_got
;
4604 plt_offset
= eh
->plt_got
.offset
;
4607 relocation
= (resolved_plt
->output_section
->vma
4608 + resolved_plt
->output_offset
4610 unresolved_reloc
= FALSE
;
4614 /* Set to symbol size. */
4615 relocation
= st_size
;
4620 if ((input_section
->flags
& SEC_ALLOC
) == 0
4624 /* Copy dynamic function pointer relocations. Don't generate
4625 dynamic relocations against resolved undefined weak symbols
4626 in PIE, except for R_386_PC32. */
4627 if ((bfd_link_pic (info
)
4629 || ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
4630 && (!resolved_to_zero
4631 || r_type
== R_386_PC32
))
4632 || h
->root
.type
!= bfd_link_hash_undefweak
))
4633 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
4634 || !SYMBOL_CALLS_LOCAL (info
, h
)))
4635 || (ELIMINATE_COPY_RELOCS
4636 && !bfd_link_pic (info
)
4640 || eh
->func_pointer_refcount
> 0
4641 || (h
->root
.type
== bfd_link_hash_undefweak
4642 && !resolved_to_zero
))
4643 && ((h
->def_dynamic
&& !h
->def_regular
)
4644 /* Undefined weak symbol is bound locally when
4646 || h
->root
.type
== bfd_link_hash_undefweak
)))
4648 Elf_Internal_Rela outrel
;
4649 bfd_boolean skip
, relocate
;
4652 /* When generating a shared object, these relocations
4653 are copied into the output file to be resolved at run
4660 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4662 if (outrel
.r_offset
== (bfd_vma
) -1)
4664 else if (outrel
.r_offset
== (bfd_vma
) -2)
4665 skip
= TRUE
, relocate
= TRUE
;
4666 outrel
.r_offset
+= (input_section
->output_section
->vma
4667 + input_section
->output_offset
);
4670 memset (&outrel
, 0, sizeof outrel
);
4673 && (r_type
== R_386_PC32
4674 || !(bfd_link_executable (info
)
4675 || SYMBOLIC_BIND (info
, h
))
4676 || !h
->def_regular
))
4677 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
4680 /* This symbol is local, or marked to become local. */
4682 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4685 sreloc
= elf_section_data (input_section
)->sreloc
;
4687 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
4689 r
= bfd_reloc_notsupported
;
4690 goto check_relocation_error
;
4693 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4695 /* If this reloc is against an external symbol, we do
4696 not want to fiddle with the addend. Otherwise, we
4697 need to include the symbol value so that it becomes
4698 an addend for the dynamic reloc. */
4705 if (!bfd_link_executable (info
))
4707 Elf_Internal_Rela outrel
;
4710 outrel
.r_offset
= rel
->r_offset
4711 + input_section
->output_section
->vma
4712 + input_section
->output_offset
;
4713 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4714 sreloc
= elf_section_data (input_section
)->sreloc
;
4717 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4722 case R_386_TLS_GOTDESC
:
4723 case R_386_TLS_DESC_CALL
:
4724 case R_386_TLS_IE_32
:
4725 case R_386_TLS_GOTIE
:
4726 tls_type
= GOT_UNKNOWN
;
4727 if (h
== NULL
&& local_got_offsets
)
4728 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
4730 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
4731 if (tls_type
== GOT_TLS_IE
)
4732 tls_type
= GOT_TLS_IE_NEG
;
4734 if (! elf_i386_tls_transition (info
, input_bfd
,
4735 input_section
, contents
,
4736 symtab_hdr
, sym_hashes
,
4737 &r_type
, tls_type
, rel
,
4738 relend
, h
, r_symndx
, TRUE
))
4741 if (r_type
== R_386_TLS_LE_32
)
4743 BFD_ASSERT (! unresolved_reloc
);
4744 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4749 /* GD->LE transition. */
4750 type
= *(contents
+ rel
->r_offset
- 2);
4754 leal foo@tlsgd(,%ebx,1), %eax
4755 call ___tls_get_addr@PLT
4758 subl $foo@tpoff, %eax
4759 (6 byte form of subl). */
4760 roff
= rel
->r_offset
+ 5;
4765 leal foo@tlsgd(%ebx), %eax
4766 call ___tls_get_addr@PLT
4769 leal foo@tlsgd(%reg), %eax
4770 call *___tls_get_addr@GOT(%reg)
4771 which may be converted to
4772 addr32 call ___tls_get_addr
4774 movl %gs:0, %eax; subl $foo@tpoff, %eax
4775 (6 byte form of subl). */
4776 roff
= rel
->r_offset
+ 6;
4778 memcpy (contents
+ roff
- 8,
4779 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4780 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4782 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4787 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4789 /* GDesc -> LE transition.
4790 It's originally something like:
4791 leal x@tlsdesc(%ebx), %eax
4795 Registers other than %eax may be set up here. */
4800 roff
= rel
->r_offset
;
4801 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
4803 /* Now modify the instruction as appropriate. */
4804 /* aoliva FIXME: remove the above and xor the byte
4806 bfd_put_8 (output_bfd
, val
^ 0x86,
4807 contents
+ roff
- 1);
4808 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4812 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4814 /* GDesc -> LE transition.
4822 roff
= rel
->r_offset
;
4823 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4824 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4827 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
4831 /* IE->LE transition:
4832 Originally it can be one of:
4840 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4843 /* movl foo, %eax. */
4844 bfd_put_8 (output_bfd
, 0xb8,
4845 contents
+ rel
->r_offset
- 1);
4851 type
= bfd_get_8 (input_bfd
,
4852 contents
+ rel
->r_offset
- 2);
4857 bfd_put_8 (output_bfd
, 0xc7,
4858 contents
+ rel
->r_offset
- 2);
4859 bfd_put_8 (output_bfd
,
4860 0xc0 | ((val
>> 3) & 7),
4861 contents
+ rel
->r_offset
- 1);
4865 bfd_put_8 (output_bfd
, 0x81,
4866 contents
+ rel
->r_offset
- 2);
4867 bfd_put_8 (output_bfd
,
4868 0xc0 | ((val
>> 3) & 7),
4869 contents
+ rel
->r_offset
- 1);
4876 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4877 contents
+ rel
->r_offset
);
4882 unsigned int val
, type
;
4884 /* {IE_32,GOTIE}->LE transition:
4885 Originally it can be one of:
4886 subl foo(%reg1), %reg2
4887 movl foo(%reg1), %reg2
4888 addl foo(%reg1), %reg2
4891 movl $foo, %reg2 (6 byte form)
4892 addl $foo, %reg2. */
4893 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4894 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4898 bfd_put_8 (output_bfd
, 0xc7,
4899 contents
+ rel
->r_offset
- 2);
4900 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4901 contents
+ rel
->r_offset
- 1);
4903 else if (type
== 0x2b)
4906 bfd_put_8 (output_bfd
, 0x81,
4907 contents
+ rel
->r_offset
- 2);
4908 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
4909 contents
+ rel
->r_offset
- 1);
4911 else if (type
== 0x03)
4914 bfd_put_8 (output_bfd
, 0x81,
4915 contents
+ rel
->r_offset
- 2);
4916 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4917 contents
+ rel
->r_offset
- 1);
4921 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4922 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4923 contents
+ rel
->r_offset
);
4925 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4926 contents
+ rel
->r_offset
);
4931 if (htab
->elf
.sgot
== NULL
)
4936 off
= h
->got
.offset
;
4937 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4941 if (local_got_offsets
== NULL
)
4944 off
= local_got_offsets
[r_symndx
];
4945 offplt
= local_tlsdesc_gotents
[r_symndx
];
4952 Elf_Internal_Rela outrel
;
4956 if (htab
->elf
.srelgot
== NULL
)
4959 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4961 if (GOT_TLS_GDESC_P (tls_type
))
4964 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4965 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4966 <= htab
->elf
.sgotplt
->size
);
4967 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4968 + htab
->elf
.sgotplt
->output_offset
4970 + htab
->sgotplt_jump_table_size
);
4971 sreloc
= htab
->elf
.srelplt
;
4972 loc
= sreloc
->contents
;
4973 loc
+= (htab
->next_tls_desc_index
++
4974 * sizeof (Elf32_External_Rel
));
4975 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4976 <= sreloc
->contents
+ sreloc
->size
);
4977 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4980 BFD_ASSERT (! unresolved_reloc
);
4981 bfd_put_32 (output_bfd
,
4982 relocation
- elf_i386_dtpoff_base (info
),
4983 htab
->elf
.sgotplt
->contents
+ offplt
4984 + htab
->sgotplt_jump_table_size
+ 4);
4988 bfd_put_32 (output_bfd
, 0,
4989 htab
->elf
.sgotplt
->contents
+ offplt
4990 + htab
->sgotplt_jump_table_size
+ 4);
4994 sreloc
= htab
->elf
.srelgot
;
4996 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4997 + htab
->elf
.sgot
->output_offset
+ off
);
4999 if (GOT_TLS_GD_P (tls_type
))
5000 dr_type
= R_386_TLS_DTPMOD32
;
5001 else if (GOT_TLS_GDESC_P (tls_type
))
5003 else if (tls_type
== GOT_TLS_IE_POS
)
5004 dr_type
= R_386_TLS_TPOFF
;
5006 dr_type
= R_386_TLS_TPOFF32
;
5008 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
5009 bfd_put_32 (output_bfd
,
5010 relocation
- elf_i386_dtpoff_base (info
),
5011 htab
->elf
.sgot
->contents
+ off
);
5012 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
5013 bfd_put_32 (output_bfd
,
5014 elf_i386_dtpoff_base (info
) - relocation
,
5015 htab
->elf
.sgot
->contents
+ off
);
5016 else if (dr_type
!= R_386_TLS_DESC
)
5017 bfd_put_32 (output_bfd
, 0,
5018 htab
->elf
.sgot
->contents
+ off
);
5019 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
5021 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5023 if (GOT_TLS_GD_P (tls_type
))
5027 BFD_ASSERT (! unresolved_reloc
);
5028 bfd_put_32 (output_bfd
,
5029 relocation
- elf_i386_dtpoff_base (info
),
5030 htab
->elf
.sgot
->contents
+ off
+ 4);
5034 bfd_put_32 (output_bfd
, 0,
5035 htab
->elf
.sgot
->contents
+ off
+ 4);
5036 outrel
.r_info
= ELF32_R_INFO (indx
,
5037 R_386_TLS_DTPOFF32
);
5038 outrel
.r_offset
+= 4;
5039 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5042 else if (tls_type
== GOT_TLS_IE_BOTH
)
5044 bfd_put_32 (output_bfd
,
5046 ? relocation
- elf_i386_dtpoff_base (info
)
5048 htab
->elf
.sgot
->contents
+ off
+ 4);
5049 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5050 outrel
.r_offset
+= 4;
5051 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5058 local_got_offsets
[r_symndx
] |= 1;
5061 if (off
>= (bfd_vma
) -2
5062 && ! GOT_TLS_GDESC_P (tls_type
))
5064 if (r_type
== R_386_TLS_GOTDESC
5065 || r_type
== R_386_TLS_DESC_CALL
)
5067 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
5068 unresolved_reloc
= FALSE
;
5070 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
5072 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
5073 + htab
->elf
.sgotplt
->output_offset
;
5074 relocation
= htab
->elf
.sgot
->output_section
->vma
5075 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
5076 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
5077 && tls_type
== GOT_TLS_IE_BOTH
)
5079 if (r_type
== R_386_TLS_IE
)
5080 relocation
+= g_o_t
;
5081 unresolved_reloc
= FALSE
;
5083 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
5085 unsigned int val
, type
;
5088 /* GD->IE transition. */
5089 type
= *(contents
+ rel
->r_offset
- 2);
5090 val
= *(contents
+ rel
->r_offset
- 1);
5094 leal foo@tlsgd(,%ebx,1), %eax
5095 call ___tls_get_addr@PLT
5098 subl $foo@gottpoff(%ebx), %eax. */
5100 roff
= rel
->r_offset
- 3;
5105 leal foo@tlsgd(%ebx), %eax
5106 call ___tls_get_addr@PLT
5109 leal foo@tlsgd(%reg), %eax
5110 call *___tls_get_addr@GOT(%reg)
5111 which may be converted to
5112 addr32 call ___tls_get_addr
5115 subl $foo@gottpoff(%reg), %eax. */
5116 roff
= rel
->r_offset
- 2;
5118 memcpy (contents
+ roff
,
5119 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
5120 contents
[roff
+ 7] = 0x80 | (val
& 7);
5121 /* If foo is used only with foo@gotntpoff(%reg) and
5122 foo@indntpoff, but not with foo@gottpoff(%reg), change
5123 subl $foo@gottpoff(%reg), %eax
5125 addl $foo@gotntpoff(%reg), %eax. */
5126 if (tls_type
== GOT_TLS_IE_POS
)
5127 contents
[roff
+ 6] = 0x03;
5128 bfd_put_32 (output_bfd
,
5129 htab
->elf
.sgot
->output_section
->vma
5130 + htab
->elf
.sgot
->output_offset
+ off
5131 - htab
->elf
.sgotplt
->output_section
->vma
5132 - htab
->elf
.sgotplt
->output_offset
,
5133 contents
+ roff
+ 8);
5134 /* Skip R_386_PLT32 and R_386_GOT32X. */
5139 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
5141 /* GDesc -> IE transition.
5142 It's originally something like:
5143 leal x@tlsdesc(%ebx), %eax
5146 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
5148 movl x@gottpoff(%ebx), %eax # before negl %eax
5150 Registers other than %eax may be set up here. */
5154 /* First, make sure it's a leal adding ebx to a 32-bit
5155 offset into any register, although it's probably
5156 almost always going to be eax. */
5157 roff
= rel
->r_offset
;
5159 /* Now modify the instruction as appropriate. */
5160 /* To turn a leal into a movl in the form we use it, it
5161 suffices to change the first byte from 0x8d to 0x8b.
5162 aoliva FIXME: should we decide to keep the leal, all
5163 we have to do is remove the statement below, and
5164 adjust the relaxation of R_386_TLS_DESC_CALL. */
5165 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
5167 if (tls_type
== GOT_TLS_IE_BOTH
)
5170 bfd_put_32 (output_bfd
,
5171 htab
->elf
.sgot
->output_section
->vma
5172 + htab
->elf
.sgot
->output_offset
+ off
5173 - htab
->elf
.sgotplt
->output_section
->vma
5174 - htab
->elf
.sgotplt
->output_offset
,
5178 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
5180 /* GDesc -> IE transition.
5188 depending on how we transformed the TLS_GOTDESC above.
5193 roff
= rel
->r_offset
;
5195 /* Now modify the instruction as appropriate. */
5196 if (tls_type
!= GOT_TLS_IE_NEG
)
5199 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
5200 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
5205 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
5206 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
5216 if (! elf_i386_tls_transition (info
, input_bfd
,
5217 input_section
, contents
,
5218 symtab_hdr
, sym_hashes
,
5219 &r_type
, GOT_UNKNOWN
, rel
,
5220 relend
, h
, r_symndx
, TRUE
))
5223 if (r_type
!= R_386_TLS_LDM
)
5225 /* LD->LE transition. Change
5226 leal foo@tlsldm(%ebx) %eax
5227 call ___tls_get_addr@PLT
5231 leal 0(%esi,1), %esi
5233 leal foo@tlsldm(%reg) %eax
5234 call *___tls_get_addr@GOT(%reg)
5235 which may be converted to
5236 addr32 call ___tls_get_addr
5239 leal 0(%esi), %esi */
5240 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
5241 if (*(contents
+ rel
->r_offset
+ 4) == 0xff
5242 || *(contents
+ rel
->r_offset
+ 4) == 0x67)
5243 memcpy (contents
+ rel
->r_offset
- 2,
5244 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5246 memcpy (contents
+ rel
->r_offset
- 2,
5247 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5248 /* Skip R_386_PC32/R_386_PLT32. */
5254 if (htab
->elf
.sgot
== NULL
)
5257 off
= htab
->tls_ldm_got
.offset
;
5262 Elf_Internal_Rela outrel
;
5264 if (htab
->elf
.srelgot
== NULL
)
5267 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5268 + htab
->elf
.sgot
->output_offset
+ off
);
5270 bfd_put_32 (output_bfd
, 0,
5271 htab
->elf
.sgot
->contents
+ off
);
5272 bfd_put_32 (output_bfd
, 0,
5273 htab
->elf
.sgot
->contents
+ off
+ 4);
5274 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
5275 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
5276 htab
->tls_ldm_got
.offset
|= 1;
5278 relocation
= htab
->elf
.sgot
->output_section
->vma
5279 + htab
->elf
.sgot
->output_offset
+ off
5280 - htab
->elf
.sgotplt
->output_section
->vma
5281 - htab
->elf
.sgotplt
->output_offset
;
5282 unresolved_reloc
= FALSE
;
5285 case R_386_TLS_LDO_32
:
5286 if (!bfd_link_executable (info
)
5287 || (input_section
->flags
& SEC_CODE
) == 0)
5288 relocation
-= elf_i386_dtpoff_base (info
);
5290 /* When converting LDO to LE, we must negate. */
5291 relocation
= -elf_i386_tpoff (info
, relocation
);
5294 case R_386_TLS_LE_32
:
5296 if (!bfd_link_executable (info
))
5298 Elf_Internal_Rela outrel
;
5301 outrel
.r_offset
= rel
->r_offset
5302 + input_section
->output_section
->vma
5303 + input_section
->output_offset
;
5304 if (h
!= NULL
&& h
->dynindx
!= -1)
5308 if (r_type
== R_386_TLS_LE_32
)
5309 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
5311 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
5312 sreloc
= elf_section_data (input_section
)->sreloc
;
5315 elf_append_rel (output_bfd
, sreloc
, &outrel
);
5318 else if (r_type
== R_386_TLS_LE_32
)
5319 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
5321 relocation
-= elf_i386_dtpoff_base (info
);
5323 else if (r_type
== R_386_TLS_LE_32
)
5324 relocation
= elf_i386_tpoff (info
, relocation
);
5326 relocation
= -elf_i386_tpoff (info
, relocation
);
5333 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5334 because such sections are not SEC_ALLOC and thus ld.so will
5335 not process them. */
5336 if (unresolved_reloc
5337 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
5339 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
5340 rel
->r_offset
) != (bfd_vma
) -1)
5343 /* xgettext:c-format */
5344 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
5349 h
->root
.root
.string
);
5354 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
5355 contents
, rel
->r_offset
,
5358 check_relocation_error
:
5359 if (r
!= bfd_reloc_ok
)
5364 name
= h
->root
.root
.string
;
5367 name
= bfd_elf_string_from_elf_section (input_bfd
,
5368 symtab_hdr
->sh_link
,
5373 name
= bfd_section_name (input_bfd
, sec
);
5376 if (r
== bfd_reloc_overflow
)
5377 (*info
->callbacks
->reloc_overflow
)
5378 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
5379 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
5383 /* xgettext:c-format */
5384 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
5385 input_bfd
, input_section
,
5386 rel
->r_offset
, name
, (int) r
);
5397 Elf_Internal_Shdr
*rel_hdr
;
5398 size_t deleted
= rel
- wrel
;
5400 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
->output_section
);
5401 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5402 if (rel_hdr
->sh_size
== 0)
5404 /* It is too late to remove an empty reloc section. Leave
5406 ??? What is wrong with an empty section??? */
5407 rel_hdr
->sh_size
= rel_hdr
->sh_entsize
;
5410 rel_hdr
= _bfd_elf_single_rel_hdr (input_section
);
5411 rel_hdr
->sh_size
-= rel_hdr
->sh_entsize
* deleted
;
5412 input_section
->reloc_count
-= deleted
;
5418 /* Finish up dynamic symbol handling. We set the contents of various
5419 dynamic sections here. */
5422 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
5423 struct bfd_link_info
*info
,
5424 struct elf_link_hash_entry
*h
,
5425 Elf_Internal_Sym
*sym
)
5427 struct elf_i386_link_hash_table
*htab
;
5428 unsigned plt_entry_size
;
5429 const struct elf_i386_backend_data
*abed
;
5430 struct elf_i386_link_hash_entry
*eh
;
5431 bfd_boolean local_undefweak
;
5432 bfd_boolean use_plt_second
;
5434 htab
= elf_i386_hash_table (info
);
5438 abed
= get_elf_i386_backend_data (output_bfd
);
5439 plt_entry_size
= htab
->plt
.plt_entry_size
;
5441 /* Use the second PLT section only if there is .plt section. */
5442 use_plt_second
= htab
->elf
.splt
!= NULL
&& htab
->plt_second
!= NULL
;
5444 eh
= (struct elf_i386_link_hash_entry
*) h
;
5445 if (eh
->no_finish_dynamic_symbol
)
5448 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5449 resolved undefined weak symbols in executable so that their
5450 references have value 0 at run-time. */
5451 local_undefweak
= UNDEFINED_WEAK_RESOLVED_TO_ZERO (info
,
5455 if (h
->plt
.offset
!= (bfd_vma
) -1)
5457 bfd_vma plt_index
, plt_offset
;
5459 Elf_Internal_Rela rel
;
5461 asection
*plt
, *resolved_plt
, *gotplt
, *relplt
;
5463 /* When building a static executable, use .iplt, .igot.plt and
5464 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5465 if (htab
->elf
.splt
!= NULL
)
5467 plt
= htab
->elf
.splt
;
5468 gotplt
= htab
->elf
.sgotplt
;
5469 relplt
= htab
->elf
.srelplt
;
5473 plt
= htab
->elf
.iplt
;
5474 gotplt
= htab
->elf
.igotplt
;
5475 relplt
= htab
->elf
.irelplt
;
5478 /* This symbol has an entry in the procedure linkage table. Set
5481 if ((h
->dynindx
== -1
5483 && !((h
->forced_local
|| bfd_link_executable (info
))
5485 && h
->type
== STT_GNU_IFUNC
))
5491 /* Get the index in the procedure linkage table which
5492 corresponds to this symbol. This is the index of this symbol
5493 in all the symbols for which we are making plt entries. The
5494 first entry in the procedure linkage table is reserved.
5496 Get the offset into the .got table of the entry that
5497 corresponds to this function. Each .got entry is 4 bytes.
5498 The first three are reserved.
5500 For static executables, we don't reserve anything. */
5502 if (plt
== htab
->elf
.splt
)
5504 got_offset
= (h
->plt
.offset
/ plt_entry_size
5505 - htab
->plt
.has_plt0
);
5506 got_offset
= (got_offset
+ 3) * 4;
5510 got_offset
= h
->plt
.offset
/ plt_entry_size
;
5511 got_offset
= got_offset
* 4;
5514 /* Fill in the entry in the procedure linkage table and update
5516 memcpy (plt
->contents
+ h
->plt
.offset
, htab
->plt
.plt_entry
,
5521 const bfd_byte
*plt_entry
;
5522 if (bfd_link_pic (info
))
5523 plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
5525 plt_entry
= htab
->non_lazy_plt
->plt_entry
;
5526 memcpy (htab
->plt_second
->contents
+ eh
->plt_second
.offset
,
5527 plt_entry
, htab
->non_lazy_plt
->plt_entry_size
);
5529 resolved_plt
= htab
->plt_second
;
5530 plt_offset
= eh
->plt_second
.offset
;
5535 plt_offset
= h
->plt
.offset
;
5538 if (! bfd_link_pic (info
))
5540 bfd_put_32 (output_bfd
,
5541 (gotplt
->output_section
->vma
5542 + gotplt
->output_offset
5544 resolved_plt
->contents
+ plt_offset
5545 + htab
->plt
.plt_got_offset
);
5547 if (abed
->os
== is_vxworks
)
5549 int s
, k
, reloc_index
;
5551 /* Create the R_386_32 relocation referencing the GOT
5552 for this PLT entry. */
5554 /* S: Current slot number (zero-based). */
5555 s
= ((h
->plt
.offset
- htab
->plt
.plt_entry_size
)
5556 / htab
->plt
.plt_entry_size
);
5557 /* K: Number of relocations for PLTResolve. */
5558 if (bfd_link_pic (info
))
5559 k
= PLTRESOLVE_RELOCS_SHLIB
;
5561 k
= PLTRESOLVE_RELOCS
;
5562 /* Skip the PLTresolve relocations, and the relocations for
5563 the other PLT slots. */
5564 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
5565 loc
= (htab
->srelplt2
->contents
+ reloc_index
5566 * sizeof (Elf32_External_Rel
));
5568 rel
.r_offset
= (plt
->output_section
->vma
5569 + plt
->output_offset
5570 + h
->plt
.offset
+ 2),
5571 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
5572 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5574 /* Create the R_386_32 relocation referencing the beginning of
5575 the PLT for this GOT entry. */
5576 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
5577 + htab
->elf
.sgotplt
->output_offset
5579 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
5580 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
5581 loc
+ sizeof (Elf32_External_Rel
));
5586 bfd_put_32 (output_bfd
, got_offset
,
5587 resolved_plt
->contents
+ plt_offset
5588 + htab
->plt
.plt_got_offset
);
5591 /* Fill in the entry in the global offset table. Leave the entry
5592 as zero for undefined weak symbol in PIE. No PLT relocation
5593 against undefined weak symbol in PIE. */
5594 if (!local_undefweak
)
5596 if (htab
->plt
.has_plt0
)
5597 bfd_put_32 (output_bfd
,
5598 (plt
->output_section
->vma
5599 + plt
->output_offset
5601 + htab
->lazy_plt
->plt_lazy_offset
),
5602 gotplt
->contents
+ got_offset
);
5604 /* Fill in the entry in the .rel.plt section. */
5605 rel
.r_offset
= (gotplt
->output_section
->vma
5606 + gotplt
->output_offset
5608 if (h
->dynindx
== -1
5609 || ((bfd_link_executable (info
)
5610 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
5612 && h
->type
== STT_GNU_IFUNC
))
5614 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
5615 h
->root
.root
.string
,
5616 h
->root
.u
.def
.section
->owner
);
5618 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5619 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5620 in the .got.plt section. */
5621 bfd_put_32 (output_bfd
,
5622 (h
->root
.u
.def
.value
5623 + h
->root
.u
.def
.section
->output_section
->vma
5624 + h
->root
.u
.def
.section
->output_offset
),
5625 gotplt
->contents
+ got_offset
);
5626 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5627 /* R_386_IRELATIVE comes last. */
5628 plt_index
= htab
->next_irelative_index
--;
5632 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
5633 plt_index
= htab
->next_jump_slot_index
++;
5636 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
5637 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
5639 /* Don't fill the second and third slots in PLT entry for
5640 static executables nor without PLT0. */
5641 if (plt
== htab
->elf
.splt
&& htab
->plt
.has_plt0
)
5643 bfd_put_32 (output_bfd
,
5644 plt_index
* sizeof (Elf32_External_Rel
),
5645 plt
->contents
+ h
->plt
.offset
5646 + htab
->lazy_plt
->plt_reloc_offset
);
5647 bfd_put_32 (output_bfd
,
5649 + htab
->lazy_plt
->plt_plt_offset
+ 4),
5650 (plt
->contents
+ h
->plt
.offset
5651 + htab
->lazy_plt
->plt_plt_offset
));
5655 else if (eh
->plt_got
.offset
!= (bfd_vma
) -1)
5657 bfd_vma got_offset
, plt_offset
;
5658 asection
*plt
, *got
, *gotplt
;
5659 const bfd_byte
*got_plt_entry
;
5661 /* Set the entry in the GOT procedure linkage table. */
5662 plt
= htab
->plt_got
;
5663 got
= htab
->elf
.sgot
;
5664 gotplt
= htab
->elf
.sgotplt
;
5665 got_offset
= h
->got
.offset
;
5667 if (got_offset
== (bfd_vma
) -1
5673 /* Fill in the entry in the GOT procedure linkage table. */
5674 if (! bfd_link_pic (info
))
5676 got_plt_entry
= htab
->non_lazy_plt
->plt_entry
;
5677 got_offset
+= got
->output_section
->vma
+ got
->output_offset
;
5681 got_plt_entry
= htab
->non_lazy_plt
->pic_plt_entry
;
5682 got_offset
+= (got
->output_section
->vma
5683 + got
->output_offset
5684 - gotplt
->output_section
->vma
5685 - gotplt
->output_offset
);
5688 plt_offset
= eh
->plt_got
.offset
;
5689 memcpy (plt
->contents
+ plt_offset
, got_plt_entry
,
5690 htab
->non_lazy_plt
->plt_entry_size
);
5691 bfd_put_32 (output_bfd
, got_offset
,
5692 (plt
->contents
+ plt_offset
5693 + htab
->non_lazy_plt
->plt_got_offset
));
5696 if (!local_undefweak
5698 && (h
->plt
.offset
!= (bfd_vma
) -1
5699 || eh
->plt_got
.offset
!= (bfd_vma
) -1))
5701 /* Mark the symbol as undefined, rather than as defined in
5702 the .plt section. Leave the value if there were any
5703 relocations where pointer equality matters (this is a clue
5704 for the dynamic linker, to make function pointer
5705 comparisons work between an application and shared
5706 library), otherwise set it to zero. If a function is only
5707 called from a binary, there is no need to slow down
5708 shared libraries because of that. */
5709 sym
->st_shndx
= SHN_UNDEF
;
5710 if (!h
->pointer_equality_needed
)
5714 /* Don't generate dynamic GOT relocation against undefined weak
5715 symbol in executable. */
5716 if (h
->got
.offset
!= (bfd_vma
) -1
5717 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
5718 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0
5719 && !local_undefweak
)
5721 Elf_Internal_Rela rel
;
5722 asection
*relgot
= htab
->elf
.srelgot
;
5724 /* This symbol has an entry in the global offset table. Set it
5727 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
5730 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
5731 + htab
->elf
.sgot
->output_offset
5732 + (h
->got
.offset
& ~(bfd_vma
) 1));
5734 /* If this is a static link, or it is a -Bsymbolic link and the
5735 symbol is defined locally or was forced to be local because
5736 of a version file, we just want to emit a RELATIVE reloc.
5737 The entry in the global offset table will already have been
5738 initialized in the relocate_section function. */
5740 && h
->type
== STT_GNU_IFUNC
)
5742 if (h
->plt
.offset
== (bfd_vma
) -1)
5744 /* STT_GNU_IFUNC is referenced without PLT. */
5745 if (htab
->elf
.splt
== NULL
)
5747 /* use .rel[a].iplt section to store .got relocations
5748 in static executable. */
5749 relgot
= htab
->elf
.irelplt
;
5751 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
5753 info
->callbacks
->minfo (_("Local IFUNC function `%s' in %B\n"),
5754 h
->root
.root
.string
,
5755 h
->root
.u
.def
.section
->owner
);
5757 bfd_put_32 (output_bfd
,
5758 (h
->root
.u
.def
.value
5759 + h
->root
.u
.def
.section
->output_section
->vma
5760 + h
->root
.u
.def
.section
->output_offset
),
5761 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5762 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
5767 else if (bfd_link_pic (info
))
5769 /* Generate R_386_GLOB_DAT. */
5777 if (!h
->pointer_equality_needed
)
5780 /* For non-shared object, we can't use .got.plt, which
5781 contains the real function addres if we need pointer
5782 equality. We load the GOT entry with the PLT entry. */
5783 if (htab
->plt_second
!= NULL
)
5785 plt
= htab
->plt_second
;
5786 plt_offset
= eh
->plt_second
.offset
;
5790 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
5791 plt_offset
= h
->plt
.offset
;
5793 bfd_put_32 (output_bfd
,
5794 (plt
->output_section
->vma
5795 + plt
->output_offset
+ plt_offset
),
5796 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5800 else if (bfd_link_pic (info
)
5801 && SYMBOL_REFERENCES_LOCAL (info
, h
))
5803 BFD_ASSERT((h
->got
.offset
& 1) != 0);
5804 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
5808 BFD_ASSERT((h
->got
.offset
& 1) == 0);
5810 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
5811 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
5812 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
5815 elf_append_rel (output_bfd
, relgot
, &rel
);
5820 Elf_Internal_Rela rel
;
5823 /* This symbol needs a copy reloc. Set it up. */
5825 if (h
->dynindx
== -1
5826 || (h
->root
.type
!= bfd_link_hash_defined
5827 && h
->root
.type
!= bfd_link_hash_defweak
)
5828 || htab
->elf
.srelbss
== NULL
5829 || htab
->elf
.sreldynrelro
== NULL
)
5832 rel
.r_offset
= (h
->root
.u
.def
.value
5833 + h
->root
.u
.def
.section
->output_section
->vma
5834 + h
->root
.u
.def
.section
->output_offset
);
5835 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
5836 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
5837 s
= htab
->elf
.sreldynrelro
;
5839 s
= htab
->elf
.srelbss
;
5840 elf_append_rel (output_bfd
, s
, &rel
);
5846 /* Finish up local dynamic symbol handling. We set the contents of
5847 various dynamic sections here. */
5850 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
5852 struct elf_link_hash_entry
*h
5853 = (struct elf_link_hash_entry
*) *slot
;
5854 struct bfd_link_info
*info
5855 = (struct bfd_link_info
*) inf
;
5857 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
5861 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5862 here since undefined weak symbol may not be dynamic and may not be
5863 called for elf_i386_finish_dynamic_symbol. */
5866 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry
*bh
,
5869 struct elf_link_hash_entry
*h
= (struct elf_link_hash_entry
*) bh
;
5870 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
5872 if (h
->root
.type
!= bfd_link_hash_undefweak
5873 || h
->dynindx
!= -1)
5876 return elf_i386_finish_dynamic_symbol (info
->output_bfd
,
5880 /* Used to decide how to sort relocs in an optimal manner for the
5881 dynamic linker, before writing them out. */
5883 static enum elf_reloc_type_class
5884 elf_i386_reloc_type_class (const struct bfd_link_info
*info
,
5885 const asection
*rel_sec ATTRIBUTE_UNUSED
,
5886 const Elf_Internal_Rela
*rela
)
5888 bfd
*abfd
= info
->output_bfd
;
5889 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
5890 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
5892 if (htab
->dynsym
!= NULL
5893 && htab
->dynsym
->contents
!= NULL
)
5895 /* Check relocation against STT_GNU_IFUNC symbol if there are
5897 unsigned long r_symndx
= ELF32_R_SYM (rela
->r_info
);
5898 if (r_symndx
!= STN_UNDEF
)
5900 Elf_Internal_Sym sym
;
5901 if (!bed
->s
->swap_symbol_in (abfd
,
5902 (htab
->dynsym
->contents
5903 + r_symndx
* sizeof (Elf32_External_Sym
)),
5907 if (ELF32_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
5908 return reloc_class_ifunc
;
5912 switch (ELF32_R_TYPE (rela
->r_info
))
5914 case R_386_IRELATIVE
:
5915 return reloc_class_ifunc
;
5916 case R_386_RELATIVE
:
5917 return reloc_class_relative
;
5918 case R_386_JUMP_SLOT
:
5919 return reloc_class_plt
;
5921 return reloc_class_copy
;
5923 return reloc_class_normal
;
5927 /* Finish up the dynamic sections. */
5930 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
5931 struct bfd_link_info
*info
)
5933 struct elf_i386_link_hash_table
*htab
;
5936 const struct elf_i386_backend_data
*abed
;
5938 htab
= elf_i386_hash_table (info
);
5942 dynobj
= htab
->elf
.dynobj
;
5943 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
5944 abed
= get_elf_i386_backend_data (output_bfd
);
5946 if (htab
->elf
.dynamic_sections_created
)
5948 Elf32_External_Dyn
*dyncon
, *dynconend
;
5950 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
5953 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
5954 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
5955 for (; dyncon
< dynconend
; dyncon
++)
5957 Elf_Internal_Dyn dyn
;
5960 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
5965 if (abed
->os
== is_vxworks
5966 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
5971 s
= htab
->elf
.sgotplt
;
5972 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5976 s
= htab
->elf
.srelplt
;
5977 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
5981 s
= htab
->elf
.srelplt
;
5982 dyn
.d_un
.d_val
= s
->size
;
5986 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
5989 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
5991 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5992 really seem like the right value. */
5993 elf_section_data (htab
->elf
.splt
->output_section
)
5994 ->this_hdr
.sh_entsize
= 4;
5996 if (htab
->plt
.has_plt0
)
5998 /* Fill in the special first entry in the procedure linkage
6000 memcpy (htab
->elf
.splt
->contents
, htab
->plt
.plt0_entry
,
6001 htab
->lazy_plt
->plt0_entry_size
);
6002 memset (htab
->elf
.splt
->contents
+ htab
->lazy_plt
->plt0_entry_size
,
6003 abed
->plt0_pad_byte
,
6004 htab
->plt
.plt_entry_size
- htab
->lazy_plt
->plt0_entry_size
);
6005 if (!bfd_link_pic (info
))
6007 bfd_put_32 (output_bfd
,
6008 (htab
->elf
.sgotplt
->output_section
->vma
6009 + htab
->elf
.sgotplt
->output_offset
6011 htab
->elf
.splt
->contents
6012 + htab
->lazy_plt
->plt0_got1_offset
);
6013 bfd_put_32 (output_bfd
,
6014 (htab
->elf
.sgotplt
->output_section
->vma
6015 + htab
->elf
.sgotplt
->output_offset
6017 htab
->elf
.splt
->contents
6018 + htab
->lazy_plt
->plt0_got2_offset
);
6020 if (abed
->os
== is_vxworks
)
6022 Elf_Internal_Rela rel
;
6023 int num_plts
= (htab
->elf
.splt
->size
6024 / htab
->plt
.plt_entry_size
) - 1;
6027 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
6028 + 4. On IA32 we use REL relocations so the
6029 addend goes in the PLT directly. */
6030 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
6031 + htab
->elf
.splt
->output_offset
6032 + htab
->lazy_plt
->plt0_got1_offset
);
6033 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
6035 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
6036 htab
->srelplt2
->contents
);
6037 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_
6039 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
6040 + htab
->elf
.splt
->output_offset
6041 + htab
->lazy_plt
->plt0_got2_offset
);
6042 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
6044 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
6045 htab
->srelplt2
->contents
+
6046 sizeof (Elf32_External_Rel
));
6047 /* Correct the .rel.plt.unloaded relocations. */
6048 p
= htab
->srelplt2
->contents
;
6049 if (bfd_link_pic (info
))
6050 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
6052 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
6054 for (; num_plts
; num_plts
--)
6056 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
6057 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
,
6059 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
6060 p
+= sizeof (Elf32_External_Rel
);
6062 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
6063 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
,
6065 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
6066 p
+= sizeof (Elf32_External_Rel
);
6073 if (htab
->plt_got
!= NULL
&& htab
->plt_got
->size
> 0)
6074 elf_section_data (htab
->plt_got
->output_section
)
6075 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
6077 if (htab
->plt_second
!= NULL
&& htab
->plt_second
->size
> 0)
6078 elf_section_data (htab
->plt_second
->output_section
)
6079 ->this_hdr
.sh_entsize
= htab
->non_lazy_plt
->plt_entry_size
;
6082 /* Fill in the first three entries in the global offset table. */
6083 if (htab
->elf
.sgotplt
&& htab
->elf
.sgotplt
->size
> 0)
6085 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
6088 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
6092 bfd_put_32 (output_bfd
,
6094 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
6095 htab
->elf
.sgotplt
->contents
);
6096 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
6097 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
6099 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
6102 /* Adjust .eh_frame for .plt section. */
6103 if (htab
->plt_eh_frame
!= NULL
6104 && htab
->plt_eh_frame
->contents
!= NULL
)
6106 if (htab
->elf
.splt
!= NULL
6107 && htab
->elf
.splt
->size
!= 0
6108 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
6109 && htab
->elf
.splt
->output_section
!= NULL
6110 && htab
->plt_eh_frame
->output_section
!= NULL
)
6112 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
6113 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
6114 + htab
->plt_eh_frame
->output_offset
6115 + PLT_FDE_START_OFFSET
;
6116 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6117 htab
->plt_eh_frame
->contents
6118 + PLT_FDE_START_OFFSET
);
6120 if (htab
->plt_eh_frame
->sec_info_type
6121 == SEC_INFO_TYPE_EH_FRAME
)
6123 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6125 htab
->plt_eh_frame
->contents
))
6130 /* Adjust .eh_frame for .plt.got section. */
6131 if (htab
->plt_got_eh_frame
!= NULL
6132 && htab
->plt_got_eh_frame
->contents
!= NULL
)
6134 if (htab
->plt_got
!= NULL
6135 && htab
->plt_got
->size
!= 0
6136 && (htab
->plt_got
->flags
& SEC_EXCLUDE
) == 0
6137 && htab
->plt_got
->output_section
!= NULL
6138 && htab
->plt_got_eh_frame
->output_section
!= NULL
)
6140 bfd_vma plt_start
= htab
->plt_got
->output_section
->vma
;
6141 bfd_vma eh_frame_start
= htab
->plt_got_eh_frame
->output_section
->vma
6142 + htab
->plt_got_eh_frame
->output_offset
6143 + PLT_FDE_START_OFFSET
;
6144 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6145 htab
->plt_got_eh_frame
->contents
6146 + PLT_FDE_START_OFFSET
);
6148 if (htab
->plt_got_eh_frame
->sec_info_type
== SEC_INFO_TYPE_EH_FRAME
)
6150 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6151 htab
->plt_got_eh_frame
,
6152 htab
->plt_got_eh_frame
->contents
))
6157 /* Adjust .eh_frame for the second PLT section. */
6158 if (htab
->plt_second_eh_frame
!= NULL
6159 && htab
->plt_second_eh_frame
->contents
!= NULL
)
6161 if (htab
->plt_second
!= NULL
6162 && htab
->plt_second
->size
!= 0
6163 && (htab
->plt_second
->flags
& SEC_EXCLUDE
) == 0
6164 && htab
->plt_second
->output_section
!= NULL
6165 && htab
->plt_second_eh_frame
->output_section
!= NULL
)
6167 bfd_vma plt_start
= htab
->plt_second
->output_section
->vma
;
6168 bfd_vma eh_frame_start
6169 = (htab
->plt_second_eh_frame
->output_section
->vma
6170 + htab
->plt_second_eh_frame
->output_offset
6171 + PLT_FDE_START_OFFSET
);
6172 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
6173 htab
->plt_second_eh_frame
->contents
6174 + PLT_FDE_START_OFFSET
);
6176 if (htab
->plt_second_eh_frame
->sec_info_type
6177 == SEC_INFO_TYPE_EH_FRAME
)
6179 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
6180 htab
->plt_second_eh_frame
,
6181 htab
->plt_second_eh_frame
->contents
))
6186 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
6187 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
6189 /* Fill PLT entries for undefined weak symbols in PIE. */
6190 if (bfd_link_pie (info
))
6191 bfd_hash_traverse (&info
->hash
->table
,
6192 elf_i386_pie_finish_undefweak_symbol
,
6198 /* Fill PLT/GOT entries and allocate dynamic relocations for local
6199 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
6200 It has to be done before elf_link_sort_relocs is called so that
6201 dynamic relocations are properly sorted. */
6204 elf_i386_output_arch_local_syms
6205 (bfd
*output_bfd ATTRIBUTE_UNUSED
,
6206 struct bfd_link_info
*info
,
6207 void *flaginfo ATTRIBUTE_UNUSED
,
6208 int (*func
) (void *, const char *,
6211 struct elf_link_hash_entry
*) ATTRIBUTE_UNUSED
)
6213 struct elf_i386_link_hash_table
*htab
= elf_i386_hash_table (info
);
6217 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
6218 htab_traverse (htab
->loc_hash_table
,
6219 elf_i386_finish_local_dynamic_symbol
,
6225 /* Sort relocs into address order. */
6228 compare_relocs (const void *ap
, const void *bp
)
6230 const arelent
*a
= * (const arelent
**) ap
;
6231 const arelent
*b
= * (const arelent
**) bp
;
6233 if (a
->address
> b
->address
)
6235 else if (a
->address
< b
->address
)
6241 enum elf_i386_plt_type
6246 plt_second
= 1 << 2,
6255 enum elf_i386_plt_type type
;
6256 unsigned int plt_got_offset
;
6257 unsigned int plt_entry_size
;
6261 /* Forward declaration. */
6262 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt
;
6264 /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all
6265 dynamic relocations. */
6268 elf_i386_get_synthetic_symtab (bfd
*abfd
,
6269 long symcount ATTRIBUTE_UNUSED
,
6270 asymbol
**syms ATTRIBUTE_UNUSED
,
6275 long size
, count
, i
, n
;
6277 unsigned int plt_got_offset
, plt_entry_size
;
6279 bfd_byte
*plt_contents
;
6280 long dynrelcount
, relsize
;
6281 arelent
**dynrelbuf
;
6282 const struct elf_i386_lazy_plt_layout
*lazy_plt
;
6283 const struct elf_i386_non_lazy_plt_layout
*non_lazy_plt
;
6284 const struct elf_i386_lazy_plt_layout
*lazy_ibt_plt
;
6285 const struct elf_i386_non_lazy_plt_layout
*non_lazy_ibt_plt
;
6289 enum elf_i386_plt_type plt_type
;
6290 struct elf_i386_plt plts
[] =
6292 { ".plt", NULL
, NULL
, plt_unknown
, 0, 0, 0 },
6293 { ".plt.got", NULL
, NULL
, plt_non_lazy
, 0, 0, 0 },
6294 { ".plt.sec", NULL
, NULL
, plt_second
, 0, 0, 0 },
6295 { NULL
, NULL
, NULL
, plt_non_lazy
, 0, 0, 0 }
6300 if ((abfd
->flags
& (DYNAMIC
| EXEC_P
)) == 0)
6303 if (dynsymcount
<= 0)
6306 relsize
= bfd_get_dynamic_reloc_upper_bound (abfd
);
6310 dynrelbuf
= (arelent
**) bfd_malloc (relsize
);
6311 if (dynrelbuf
== NULL
)
6314 dynrelcount
= bfd_canonicalize_dynamic_reloc (abfd
, dynrelbuf
,
6317 /* Sort the relocs by address. */
6318 qsort (dynrelbuf
, dynrelcount
, sizeof (arelent
*), compare_relocs
);
6320 non_lazy_plt
= NULL
;
6321 /* Silence GCC 6. */
6323 non_lazy_ibt_plt
= NULL
;
6324 lazy_ibt_plt
= NULL
;
6325 switch (get_elf_i386_backend_data (abfd
)->os
)
6328 non_lazy_plt
= &elf_i386_non_lazy_plt
;
6329 lazy_ibt_plt
= &elf_i386_lazy_ibt_plt
;
6330 non_lazy_ibt_plt
= &elf_i386_non_lazy_ibt_plt
;
6333 lazy_plt
= &elf_i386_lazy_plt
;
6336 lazy_plt
= &elf_i386_nacl_plt
;
6343 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6345 plt
= bfd_get_section_by_name (abfd
, plts
[j
].name
);
6349 /* Get the PLT section contents. */
6350 plt_contents
= (bfd_byte
*) bfd_malloc (plt
->size
);
6351 if (plt_contents
== NULL
)
6353 if (!bfd_get_section_contents (abfd
, (asection
*) plt
,
6354 plt_contents
, 0, plt
->size
))
6356 free (plt_contents
);
6360 /* Check what kind of PLT it is. */
6361 plt_type
= plt_unknown
;
6362 if (plts
[j
].type
== plt_unknown
)
6364 /* Match lazy PLT first. */
6365 if (memcmp (plt_contents
, lazy_plt
->plt0_entry
,
6366 lazy_plt
->plt0_got1_offset
) == 0)
6368 /* The fist entry in the lazy IBT PLT is the same as the
6370 if (lazy_ibt_plt
!= NULL
6371 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
6372 lazy_ibt_plt
->plt_entry
,
6373 lazy_ibt_plt
->plt_got_offset
) == 0))
6374 plt_type
= plt_lazy
| plt_second
;
6376 plt_type
= plt_lazy
;
6378 else if (memcmp (plt_contents
, lazy_plt
->pic_plt0_entry
,
6379 lazy_plt
->plt0_got1_offset
) == 0)
6381 /* The fist entry in the PIC lazy IBT PLT is the same as
6382 the normal PIC lazy PLT. */
6383 if (lazy_ibt_plt
!= NULL
6384 && (memcmp (plt_contents
+ lazy_ibt_plt
->plt_entry_size
,
6385 lazy_ibt_plt
->pic_plt_entry
,
6386 lazy_ibt_plt
->plt_got_offset
) == 0))
6387 plt_type
= plt_lazy
| plt_pic
| plt_second
;
6389 plt_type
= plt_lazy
| plt_pic
;
6393 if (non_lazy_plt
!= NULL
6394 && (plt_type
== plt_unknown
|| plt_type
== plt_non_lazy
))
6396 /* Match non-lazy PLT. */
6397 if (memcmp (plt_contents
, non_lazy_plt
->plt_entry
,
6398 non_lazy_plt
->plt_got_offset
) == 0)
6399 plt_type
= plt_non_lazy
;
6400 else if (memcmp (plt_contents
, non_lazy_plt
->pic_plt_entry
,
6401 non_lazy_plt
->plt_got_offset
) == 0)
6405 if ((non_lazy_ibt_plt
!= NULL
)
6406 && (plt_type
== plt_unknown
|| plt_type
== plt_second
))
6408 if (memcmp (plt_contents
,
6409 non_lazy_ibt_plt
->plt_entry
,
6410 non_lazy_ibt_plt
->plt_got_offset
) == 0)
6412 /* Match IBT PLT. */
6413 plt_type
= plt_second
;
6414 non_lazy_plt
= non_lazy_ibt_plt
;
6416 else if (memcmp (plt_contents
,
6417 non_lazy_ibt_plt
->pic_plt_entry
,
6418 non_lazy_ibt_plt
->plt_got_offset
) == 0)
6420 /* Match PIC IBT PLT. */
6421 plt_type
= plt_second
| plt_pic
;
6422 non_lazy_plt
= non_lazy_ibt_plt
;
6426 if (plt_type
== plt_unknown
)
6430 plts
[j
].type
= plt_type
;
6432 if ((plt_type
& plt_lazy
))
6434 plts
[j
].plt_got_offset
= lazy_plt
->plt_got_offset
;
6435 plts
[j
].plt_entry_size
= lazy_plt
->plt_entry_size
;
6436 /* Skip PLT0 in lazy PLT. */
6441 plts
[j
].plt_got_offset
= non_lazy_plt
->plt_got_offset
;
6442 plts
[j
].plt_entry_size
= non_lazy_plt
->plt_entry_size
;
6446 /* Skip lazy PLT when the second PLT is used. */
6447 if ((plt_type
& (plt_lazy
| plt_second
))
6448 == (plt_lazy
| plt_second
))
6452 n
= plt
->size
/ plts
[j
].plt_entry_size
;
6457 plts
[j
].contents
= plt_contents
;
6459 /* The _GLOBAL_OFFSET_TABLE_ address is needed. */
6460 if ((plt_type
& plt_pic
))
6461 got_addr
= (bfd_vma
) -1;
6464 size
= count
* sizeof (asymbol
);
6465 s
= *ret
= (asymbol
*) bfd_zmalloc (size
);
6469 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6470 if (plts
[j
].contents
!= NULL
)
6471 free (plts
[j
].contents
);
6478 /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_
6480 asection
*sec
= bfd_get_section_by_name (abfd
, ".got.plt");
6482 got_addr
= sec
->vma
;
6485 sec
= bfd_get_section_by_name (abfd
, ".got");
6487 got_addr
= sec
->vma
;
6490 if (got_addr
== (bfd_vma
) -1)
6494 /* Check for each PLT section. */
6497 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6498 if ((plt_contents
= plts
[j
].contents
) != NULL
)
6503 plt_got_offset
= plts
[j
].plt_got_offset
;
6504 plt_entry_size
= plts
[j
].plt_entry_size
;
6508 if ((plts
[j
].type
& plt_lazy
))
6510 /* Skip PLT0 in lazy PLT. */
6512 offset
= plt_entry_size
;
6520 /* Check each PLT entry against dynamic relocations. */
6521 for (; k
< plts
[j
].count
; k
++)
6528 /* Get the GOT offset, a signed 32-bit integer. */
6529 off
= H_GET_32 (abfd
, (plt_contents
+ offset
6531 got_vma
= got_addr
+ off
;
6533 /* Binary search. */
6537 while ((min
+ 1) < max
)
6541 mid
= (min
+ max
) / 2;
6543 if (got_vma
> r
->address
)
6545 else if (got_vma
< r
->address
)
6554 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
6555 if (got_vma
== p
->address
6557 && (p
->howto
->type
== R_386_JUMP_SLOT
6558 || p
->howto
->type
== R_386_GLOB_DAT
6559 || p
->howto
->type
== R_386_IRELATIVE
))
6561 *s
= **p
->sym_ptr_ptr
;
6562 /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL
6563 set. Since we are defining a symbol, ensure one
6565 if ((s
->flags
& BSF_LOCAL
) == 0)
6566 s
->flags
|= BSF_GLOBAL
;
6567 s
->flags
|= BSF_SYNTHETIC
;
6568 /* This is no longer a section symbol. */
6569 s
->flags
&= ~BSF_SECTION_SYM
;
6571 s
->the_bfd
= plt
->owner
;
6573 /* Store relocation for later use. */
6575 /* Add @plt to function name later. */
6576 size
+= strlen (s
->name
) + sizeof ("@plt");
6578 size
+= sizeof ("+0x") - 1 + 8;
6582 offset
+= plt_entry_size
;
6586 /* PLT entries with R_386_TLS_DESC relocations are skipped. */
6592 /* Allocate space for @plt suffixes. */
6593 names
= (char *) bfd_malloc (size
);
6598 for (i
= 0; i
< count
; i
++)
6600 /* Add @plt to function name. */
6601 arelent
*p
= (arelent
*) s
->udata
.p
;
6604 size
= strlen (s
->name
);
6605 memcpy (names
, s
->name
, size
);
6612 memcpy (names
, "+0x", sizeof ("+0x") - 1);
6613 names
+= sizeof ("+0x") - 1;
6614 bfd_sprintf_vma (abfd
, buf
, p
->addend
);
6615 for (a
= buf
; *a
== '0'; ++a
)
6618 memcpy (names
, a
, size
);
6621 memcpy (names
, "@plt", sizeof ("@plt"));
6622 names
+= sizeof ("@plt");
6626 for (j
= 0; plts
[j
].name
!= NULL
; j
++)
6627 if (plts
[j
].contents
!= NULL
)
6628 free (plts
[j
].contents
);
6635 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6638 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
6640 if (h
->plt
.offset
!= (bfd_vma
) -1
6642 && !h
->pointer_equality_needed
)
6645 return _bfd_elf_hash_symbol (h
);
6648 /* Parse i386 GNU properties. */
6650 static enum elf_property_kind
6651 elf_i386_parse_gnu_properties (bfd
*abfd
, unsigned int type
,
6652 bfd_byte
*ptr
, unsigned int datasz
)
6658 case GNU_PROPERTY_X86_ISA_1_USED
:
6659 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6660 case GNU_PROPERTY_X86_FEATURE_1_AND
:
6664 ((type
== GNU_PROPERTY_X86_ISA_1_USED
6665 ? _("error: %B: <corrupt x86 ISA used size: 0x%x>")
6666 : (type
== GNU_PROPERTY_X86_ISA_1_NEEDED
6667 ? _("error: %B: <corrupt x86 ISA needed size: 0x%x>")
6668 : _("error: %B: <corrupt x86 feature size: 0x%x>"))),
6670 return property_corrupt
;
6672 prop
= _bfd_elf_get_property (abfd
, type
, datasz
);
6673 /* Combine properties of the same type. */
6674 prop
->u
.number
|= bfd_h_get_32 (abfd
, ptr
);
6675 prop
->pr_kind
= property_number
;
6679 return property_ignored
;
6682 return property_number
;
6685 /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL,
6686 return TRUE if APROP is updated. Otherwise, return TRUE if BPROP
6687 should be merged with ABFD. */
6690 elf_i386_merge_gnu_properties (struct bfd_link_info
*info
,
6691 bfd
*abfd ATTRIBUTE_UNUSED
,
6692 elf_property
*aprop
,
6693 elf_property
*bprop
)
6695 unsigned int number
, features
;
6696 bfd_boolean updated
= FALSE
;
6697 unsigned int pr_type
= aprop
!= NULL
? aprop
->pr_type
: bprop
->pr_type
;
6701 case GNU_PROPERTY_X86_ISA_1_USED
:
6702 case GNU_PROPERTY_X86_ISA_1_NEEDED
:
6703 if (aprop
!= NULL
&& bprop
!= NULL
)
6705 number
= aprop
->u
.number
;
6706 aprop
->u
.number
= number
| bprop
->u
.number
;
6707 updated
= number
!= (unsigned int) aprop
->u
.number
;
6711 /* Return TRUE if APROP is NULL to indicate that BPROP should
6712 be added to ABFD. */
6713 updated
= aprop
== NULL
;
6717 case GNU_PROPERTY_X86_FEATURE_1_AND
:
6718 /* Only one of APROP and BPROP can be NULL:
6719 1. APROP & BPROP when both APROP and BPROP aren't NULL.
6720 2. If APROP is NULL, remove x86 feature.
6721 3. Otherwise, do nothing.
6723 if (aprop
!= NULL
&& bprop
!= NULL
)
6727 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
6729 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
6730 number
= aprop
->u
.number
;
6731 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
6732 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6733 aprop
->u
.number
= (number
& bprop
->u
.number
) | features
;
6734 updated
= number
!= (unsigned int) aprop
->u
.number
;
6735 /* Remove the property if all feature bits are cleared. */
6736 if (aprop
->u
.number
== 0)
6737 aprop
->pr_kind
= property_remove
;
6743 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
6745 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
6748 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
6749 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6752 number
= aprop
->u
.number
;
6753 aprop
->u
.number
= number
| features
;
6754 updated
= number
!= (unsigned int) aprop
->u
.number
;
6758 bprop
->u
.number
|= features
;
6762 else if (aprop
!= NULL
)
6764 aprop
->pr_kind
= property_remove
;
6771 /* Never should happen. */
6778 /* Set up i386 GNU properties. Return the first relocatable ELF input
6779 with GNU properties if found. Otherwise, return NULL. */
6782 elf_i386_link_setup_gnu_properties (struct bfd_link_info
*info
)
6784 bfd_boolean normal_target
;
6785 bfd_boolean lazy_plt
;
6786 asection
*sec
, *pltsec
;
6788 bfd_boolean use_ibt_plt
;
6789 unsigned int plt_alignment
, features
;
6790 struct elf_i386_link_hash_table
*htab
;
6795 features
= GNU_PROPERTY_X86_FEATURE_1_IBT
;
6797 features
|= GNU_PROPERTY_X86_FEATURE_1_SHSTK
;
6800 /* Turn on GNU_PROPERTY_X86_FEATURE_1_IBT and
6801 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6805 for (pbfd
= info
->input_bfds
;
6807 pbfd
= pbfd
->link
.next
)
6808 if (bfd_get_flavour (pbfd
) == bfd_target_elf_flavour
6809 && bfd_count_sections (pbfd
) != 0)
6813 if (elf_properties (pbfd
) != NULL
)
6815 /* Find a normal input file with GNU property note. */
6816 prop
= _bfd_elf_get_property (pbfd
,
6817 GNU_PROPERTY_X86_FEATURE_1_AND
,
6819 /* Add GNU_PROPERTY_X86_FEATURE_1_IBT and
6820 GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
6821 prop
->u
.number
|= features
;
6822 prop
->pr_kind
= property_number
;
6827 if (pbfd
== NULL
&& ebfd
!= NULL
)
6829 /* Create GNU_PROPERTY_X86_FEATURE_1_IBT if needed. */
6830 prop
= _bfd_elf_get_property (ebfd
,
6831 GNU_PROPERTY_X86_FEATURE_1_AND
,
6833 prop
->u
.number
= features
;
6834 prop
->pr_kind
= property_number
;
6836 sec
= bfd_make_section_with_flags (ebfd
,
6837 NOTE_GNU_PROPERTY_SECTION_NAME
,
6845 info
->callbacks
->einfo (_("%F: failed to create GNU property section\n"));
6847 if (!bfd_set_section_alignment (ebfd
, sec
, 2))
6848 goto error_alignment
;
6850 elf_section_type (sec
) = SHT_NOTE
;
6854 pbfd
= _bfd_elf_link_setup_gnu_properties (info
);
6856 if (bfd_link_relocatable (info
))
6859 htab
= elf_i386_hash_table (info
);
6863 use_ibt_plt
= info
->ibtplt
|| info
->ibt
;
6864 if (!use_ibt_plt
&& pbfd
!= NULL
)
6866 /* Check if GNU_PROPERTY_X86_FEATURE_1_IBT is on. */
6867 elf_property_list
*p
;
6869 /* The property list is sorted in order of type. */
6870 for (p
= elf_properties (pbfd
); p
; p
= p
->next
)
6872 if (GNU_PROPERTY_X86_FEATURE_1_AND
== p
->property
.pr_type
)
6874 use_ibt_plt
= !!(p
->property
.u
.number
6875 & GNU_PROPERTY_X86_FEATURE_1_IBT
);
6878 else if (GNU_PROPERTY_X86_FEATURE_1_AND
< p
->property
.pr_type
)
6883 dynobj
= htab
->elf
.dynobj
;
6885 /* Set htab->elf.dynobj here so that there is no need to check and
6886 set it in check_relocs. */
6891 htab
->elf
.dynobj
= pbfd
;
6898 /* Find a normal input file to hold linker created
6900 for (abfd
= info
->input_bfds
;
6902 abfd
= abfd
->link
.next
)
6903 if (bfd_get_flavour (abfd
) == bfd_target_elf_flavour
6905 & (DYNAMIC
| BFD_LINKER_CREATED
| BFD_PLUGIN
)) == 0)
6907 htab
->elf
.dynobj
= abfd
;
6914 /* Even when lazy binding is disabled by "-z now", the PLT0 entry may
6915 still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for
6916 canonical function address. */
6917 htab
->plt
.has_plt0
= 1;
6918 normal_target
= FALSE
;
6920 switch (get_elf_i386_backend_data (info
->output_bfd
)->os
)
6925 htab
->lazy_plt
= &elf_i386_lazy_ibt_plt
;
6926 htab
->non_lazy_plt
= &elf_i386_non_lazy_ibt_plt
;
6930 htab
->lazy_plt
= &elf_i386_lazy_plt
;
6931 htab
->non_lazy_plt
= &elf_i386_non_lazy_plt
;
6933 normal_target
= TRUE
;
6936 htab
->lazy_plt
= &elf_i386_lazy_plt
;
6937 htab
->non_lazy_plt
= NULL
;
6938 if (!elf_vxworks_create_dynamic_sections (dynobj
, info
,
6940 info
->callbacks
->einfo (_("%F: failed to create VxWorks dynamic sections\n"));
6943 htab
->lazy_plt
= &elf_i386_nacl_plt
;
6944 htab
->non_lazy_plt
= NULL
;
6948 pltsec
= htab
->elf
.splt
;
6950 /* If the non-lazy PLT is available, use it for all PLT entries if
6951 there are no PLT0 or no .plt section. */
6952 if (htab
->non_lazy_plt
!= NULL
6953 && (!htab
->plt
.has_plt0
|| pltsec
== NULL
))
6956 if (bfd_link_pic (info
))
6958 = htab
->non_lazy_plt
->pic_plt_entry
;
6961 = htab
->non_lazy_plt
->plt_entry
;
6962 htab
->plt
.plt_entry_size
6963 = htab
->non_lazy_plt
->plt_entry_size
;
6964 htab
->plt
.plt_got_offset
6965 = htab
->non_lazy_plt
->plt_got_offset
;
6966 htab
->plt
.eh_frame_plt_size
6967 = htab
->non_lazy_plt
->eh_frame_plt_size
;
6968 htab
->plt
.eh_frame_plt
6969 = htab
->non_lazy_plt
->eh_frame_plt
;
6974 if (bfd_link_pic (info
))
6976 htab
->plt
.plt0_entry
6977 = htab
->lazy_plt
->pic_plt0_entry
;
6979 = htab
->lazy_plt
->pic_plt_entry
;
6983 htab
->plt
.plt0_entry
6984 = htab
->lazy_plt
->plt0_entry
;
6986 = htab
->lazy_plt
->plt_entry
;
6988 htab
->plt
.plt_entry_size
6989 = htab
->lazy_plt
->plt_entry_size
;
6990 htab
->plt
.plt_got_offset
6991 = htab
->lazy_plt
->plt_got_offset
;
6992 htab
->plt
.eh_frame_plt_size
6993 = htab
->lazy_plt
->eh_frame_plt_size
;
6994 htab
->plt
.eh_frame_plt
6995 = htab
->lazy_plt
->eh_frame_plt
;
6998 /* Return if there are no normal input files. */
7002 /* Since create_dynamic_sections isn't always called, but GOT
7003 relocations need GOT sections, create them here so that we
7004 don't need to do it in check_relocs. */
7005 if (htab
->elf
.sgot
== NULL
7006 && !_bfd_elf_create_got_section (dynobj
, info
))
7007 info
->callbacks
->einfo (_("%F: failed to create GOT sections\n"));
7009 /* Create the ifunc sections here so that check_relocs can be
7011 if (!_bfd_elf_create_ifunc_sections (dynobj
, info
))
7012 info
->callbacks
->einfo (_("%F: failed to create ifunc sections\n"));
7014 plt_alignment
= bfd_log2 (htab
->plt
.plt_entry_size
);
7018 /* Whe creating executable, set the contents of the .interp
7019 section to the interpreter. */
7020 if (bfd_link_executable (info
) && !info
->nointerp
)
7022 asection
*s
= bfd_get_linker_section (dynobj
, ".interp");
7025 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
7026 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
7030 /* Don't change PLT section alignment for NaCl since it uses
7031 64-byte PLT entry and sets PLT section alignment to 32
7035 const struct elf_backend_data
*bed
7036 = get_elf_backend_data (dynobj
);
7037 flagword pltflags
= (bed
->dynamic_sec_flags
7042 unsigned int non_lazy_plt_alignment
7043 = bfd_log2 (htab
->non_lazy_plt
->plt_entry_size
);
7046 if (!bfd_set_section_alignment (sec
->owner
, sec
,
7048 goto error_alignment
;
7050 /* Create the GOT procedure linkage table. */
7051 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7055 info
->callbacks
->einfo (_("%F: failed to create GOT PLT section\n"));
7057 if (!bfd_set_section_alignment (dynobj
, sec
,
7058 non_lazy_plt_alignment
))
7059 goto error_alignment
;
7061 htab
->plt_got
= sec
;
7069 /* Create the second PLT for Intel IBT support. IBT
7070 PLT is supported only for non-NaCl target and is
7071 is needed only for lazy binding. */
7072 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7076 info
->callbacks
->einfo (_("%F: failed to create IBT-enabled PLT section\n"));
7078 if (!bfd_set_section_alignment (dynobj
, sec
,
7080 goto error_alignment
;
7083 htab
->plt_second
= sec
;
7087 if (!info
->no_ld_generated_unwind_info
)
7089 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
7090 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
7091 | SEC_LINKER_CREATED
);
7093 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7097 info
->callbacks
->einfo (_("%F: failed to create PLT .eh_frame section\n"));
7099 if (!bfd_set_section_alignment (dynobj
, sec
, 2))
7100 goto error_alignment
;
7102 htab
->plt_eh_frame
= sec
;
7104 if (htab
->plt_got
!= NULL
)
7106 sec
= bfd_make_section_anyway_with_flags (dynobj
,
7110 info
->callbacks
->einfo (_("%F: failed to create GOT PLT .eh_frame section\n"));
7112 if (!bfd_set_section_alignment (dynobj
, sec
, 2))
7113 goto error_alignment
;
7115 htab
->plt_got_eh_frame
= sec
;
7122 /* The .iplt section is used for IFUNC symbols in static
7124 sec
= htab
->elf
.iplt
;
7126 && !bfd_set_section_alignment (sec
->owner
, sec
,
7130 info
->callbacks
->einfo (_("%F%A: failed to align section\n"),
7139 elf_i386_link_check_relocs (bfd
*abfd
, struct bfd_link_info
*info
)
7141 if (!bfd_link_relocatable (info
))
7143 /* Check for ___tls_get_addr reference. */
7144 struct elf_link_hash_entry
*h
;
7145 h
= elf_link_hash_lookup (elf_hash_table (info
), "___tls_get_addr",
7146 FALSE
, FALSE
, FALSE
);
7148 ((struct elf_i386_link_hash_entry
*) h
)->tls_get_addr
= 1;
7151 /* Invoke the regular ELF backend linker to do all the work. */
7152 return _bfd_elf_link_check_relocs (abfd
, info
);
7155 #define TARGET_LITTLE_SYM i386_elf32_vec
7156 #define TARGET_LITTLE_NAME "elf32-i386"
7157 #define ELF_ARCH bfd_arch_i386
7158 #define ELF_TARGET_ID I386_ELF_DATA
7159 #define ELF_MACHINE_CODE EM_386
7160 #define ELF_MAXPAGESIZE 0x1000
7162 #define elf_backend_can_gc_sections 1
7163 #define elf_backend_can_refcount 1
7164 #define elf_backend_want_got_plt 1
7165 #define elf_backend_plt_readonly 1
7166 #define elf_backend_want_plt_sym 0
7167 #define elf_backend_got_header_size 12
7168 #define elf_backend_plt_alignment 4
7169 #define elf_backend_dtrel_excludes_plt 1
7170 #define elf_backend_extern_protected_data 1
7171 #define elf_backend_caches_rawsize 1
7172 #define elf_backend_want_dynrelro 1
7174 /* Support RELA for objdump of prelink objects. */
7175 #define elf_info_to_howto elf_i386_info_to_howto_rel
7176 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
7178 #define bfd_elf32_mkobject elf_i386_mkobject
7180 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
7181 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
7182 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
7183 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
7184 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
7185 #define bfd_elf32_bfd_link_check_relocs elf_i386_link_check_relocs
7187 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
7188 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
7189 #define elf_backend_check_relocs elf_i386_check_relocs
7190 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
7191 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
7192 #define elf_backend_fake_sections elf_i386_fake_sections
7193 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
7194 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
7195 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
7196 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
7197 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
7198 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
7199 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
7200 #define elf_backend_relocate_section elf_i386_relocate_section
7201 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
7202 #define elf_backend_always_size_sections elf_i386_always_size_sections
7203 #define elf_backend_omit_section_dynsym \
7204 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
7205 #define elf_backend_hash_symbol elf_i386_hash_symbol
7206 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
7207 #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties
7208 #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties
7209 #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties
7211 #include "elf32-target.h"
7213 /* FreeBSD support. */
7215 #undef TARGET_LITTLE_SYM
7216 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
7217 #undef TARGET_LITTLE_NAME
7218 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
7220 #define ELF_OSABI ELFOSABI_FREEBSD
7222 /* The kernel recognizes executables as valid only if they carry a
7223 "FreeBSD" label in the ELF header. So we put this label on all
7224 executables and (for simplicity) also all other object files. */
7227 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
7229 _bfd_elf_post_process_headers (abfd
, info
);
7231 #ifdef OLD_FREEBSD_ABI_LABEL
7233 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
7234 Elf_Internal_Ehdr
*i_ehdrp
= elf_elfheader (abfd
);
7235 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
7240 #undef elf_backend_post_process_headers
7241 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
7243 #define elf32_bed elf32_i386_fbsd_bed
7245 #undef elf_backend_add_symbol_hook
7247 #include "elf32-target.h"
7251 #undef TARGET_LITTLE_SYM
7252 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
7253 #undef TARGET_LITTLE_NAME
7254 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
7256 #undef elf_backend_post_process_headers
7258 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
7259 objects won't be recognized. */
7263 #define elf32_bed elf32_i386_sol2_bed
7265 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
7267 #undef elf_backend_static_tls_alignment
7268 #define elf_backend_static_tls_alignment 8
7270 /* The Solaris 2 ABI requires a plt symbol on all platforms.
7272 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
7274 #undef elf_backend_want_plt_sym
7275 #define elf_backend_want_plt_sym 1
7277 #undef elf_backend_strtab_flags
7278 #define elf_backend_strtab_flags SHF_STRINGS
7280 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
7281 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
7282 FALSE otherwise. ISECTION is the best guess matching section from the
7283 input bfd IBFD, but it might be NULL. */
7286 elf32_i386_copy_solaris_special_section_fields (const bfd
*ibfd ATTRIBUTE_UNUSED
,
7287 bfd
*obfd ATTRIBUTE_UNUSED
,
7288 const Elf_Internal_Shdr
*isection ATTRIBUTE_UNUSED
,
7289 Elf_Internal_Shdr
*osection ATTRIBUTE_UNUSED
)
7291 /* PR 19938: FIXME: Need to add code for setting the sh_info
7292 and sh_link fields of Solaris specific section types. */
7295 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
7296 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
7298 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
7300 The following values should be set:
7303 -----------------------------------------------------------------------------
7304 SHT_SUNW_ancillary The section header index of 0
7305 [0x6fffffee] the associated string table.
7307 SHT_SUNW_capinfo The section header index of For a dynamic object, the
7308 [0x6ffffff0] the associated symbol table. section header index of
7310 SHT_SUNW_capchain table,
7313 SHT_SUNW_symsort The section header index of 0
7314 [0x6ffffff1] the associated symbol table.
7316 SHT_SUNW_tlssort The section header index of 0
7317 [0x6ffffff2] the associated symbol table.
7319 SHT_SUNW_LDYNSYM The section header index of One greater than the
7320 [0x6ffffff3] the associated string table. symbol table index of the
7321 This index is the same string last local symbol,
7322 table used by the SHT_DYNSYM STB_LOCAL. Since
7323 section. SHT_SUNW_LDYNSYM only
7324 contains local symbols,
7325 sh_info is equivalent to
7326 the number of symbols in
7329 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
7330 [0x6ffffff5] the section header index of to named strings, the
7331 the associated section header index of
7332 SHT_SUNW_capinfo table, the associated string
7333 otherwise 0. table, otherwise 0.
7335 SHT_SUNW_move The section header index of 0
7336 [0x6ffffffa] the associated symbol table.
7341 SHT_SUNW_syminfo The section header index of The section header index
7342 [0x6ffffffc] the associated symbol table. of the associated
7345 SHT_SUNW_verdef The section header index of The number of version
7346 [0x6ffffffd] the associated string table. definitions within the
7349 SHT_SUNW_verneed The section header index of The number of version
7350 [0x6ffffffe] the associated string table. dependencies within the
7353 SHT_SUNW_versym The section header index of 0
7354 [0x6fffffff] the associated symbol table. */
7357 #undef elf_backend_copy_special_section_fields
7358 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
7360 #include "elf32-target.h"
7362 /* Intel MCU support. */
7365 elf32_iamcu_elf_object_p (bfd
*abfd
)
7367 /* Set the right machine number for an IAMCU elf32 file. */
7368 bfd_default_set_arch_mach (abfd
, bfd_arch_iamcu
, bfd_mach_i386_iamcu
);
7372 #undef TARGET_LITTLE_SYM
7373 #define TARGET_LITTLE_SYM iamcu_elf32_vec
7374 #undef TARGET_LITTLE_NAME
7375 #define TARGET_LITTLE_NAME "elf32-iamcu"
7377 #define ELF_ARCH bfd_arch_iamcu
7379 #undef ELF_MACHINE_CODE
7380 #define ELF_MACHINE_CODE EM_IAMCU
7385 #define elf32_bed elf32_iamcu_bed
7387 #undef elf_backend_object_p
7388 #define elf_backend_object_p elf32_iamcu_elf_object_p
7390 #undef elf_backend_static_tls_alignment
7392 #undef elf_backend_want_plt_sym
7393 #define elf_backend_want_plt_sym 0
7395 #undef elf_backend_strtab_flags
7396 #undef elf_backend_copy_special_section_fields
7398 #include "elf32-target.h"
7400 /* Restore defaults. */
7402 #define ELF_ARCH bfd_arch_i386
7403 #undef ELF_MACHINE_CODE
7404 #define ELF_MACHINE_CODE EM_386
7406 /* Native Client support. */
7408 #undef TARGET_LITTLE_SYM
7409 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
7410 #undef TARGET_LITTLE_NAME
7411 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
7413 #define elf32_bed elf32_i386_nacl_bed
7415 #undef ELF_MAXPAGESIZE
7416 #define ELF_MAXPAGESIZE 0x10000
7418 /* Restore defaults. */
7420 #undef elf_backend_want_plt_sym
7421 #define elf_backend_want_plt_sym 0
7422 #undef elf_backend_post_process_headers
7423 #undef elf_backend_static_tls_alignment
7425 /* NaCl uses substantially different PLT entries for the same effects. */
7427 #undef elf_backend_plt_alignment
7428 #define elf_backend_plt_alignment 5
7429 #define NACL_PLT_ENTRY_SIZE 64
7430 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
7432 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
7434 0xff, 0x35, /* pushl contents of address */
7435 0, 0, 0, 0, /* replaced with address of .got + 4. */
7436 0x8b, 0x0d, /* movl contents of address, %ecx */
7437 0, 0, 0, 0, /* replaced with address of .got + 8. */
7438 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
7439 0xff, 0xe1 /* jmp *%ecx */
7442 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
7444 0x8b, 0x0d, /* movl contents of address, %ecx */
7445 0, 0, 0, 0, /* replaced with GOT slot address. */
7446 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
7447 0xff, 0xe1, /* jmp *%ecx */
7449 /* Pad to the next 32-byte boundary with nop instructions. */
7451 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7452 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7454 /* Lazy GOT entries point here (32-byte aligned). */
7455 0x68, /* pushl immediate */
7456 0, 0, 0, 0, /* replaced with reloc offset. */
7457 0xe9, /* jmp relative */
7458 0, 0, 0, 0, /* replaced with offset to .plt. */
7460 /* Pad to the next 32-byte boundary with nop instructions. */
7461 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7462 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7466 static const bfd_byte
7467 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
7469 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
7470 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
7471 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
7472 0xff, 0xe1, /* jmp *%ecx */
7474 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
7475 so pad to that size with nop instructions. */
7476 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
7479 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
7481 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
7482 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
7483 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
7484 0xff, 0xe1, /* jmp *%ecx */
7486 /* Pad to the next 32-byte boundary with nop instructions. */
7488 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7489 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7491 /* Lazy GOT entries point here (32-byte aligned). */
7492 0x68, /* pushl immediate */
7493 0, 0, 0, 0, /* replaced with offset into relocation table. */
7494 0xe9, /* jmp relative */
7495 0, 0, 0, 0, /* replaced with offset to start of .plt. */
7497 /* Pad to the next 32-byte boundary with nop instructions. */
7498 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7499 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
7503 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
7505 #if (PLT_CIE_LENGTH != 20 \
7506 || PLT_FDE_LENGTH != 36 \
7507 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
7508 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
7509 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
7511 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
7512 0, 0, 0, 0, /* CIE ID */
7513 1, /* CIE version */
7514 'z', 'R', 0, /* Augmentation string */
7515 1, /* Code alignment factor */
7516 0x7c, /* Data alignment factor: -4 */
7517 8, /* Return address column */
7518 1, /* Augmentation size */
7519 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
7520 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
7521 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
7522 DW_CFA_nop
, DW_CFA_nop
,
7524 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
7525 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
7526 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
7527 0, 0, 0, 0, /* .plt size goes here */
7528 0, /* Augmentation size */
7529 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
7530 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
7531 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
7532 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
7533 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
7534 13, /* Block length */
7535 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
7536 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
7537 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
7538 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
7539 DW_CFA_nop
, DW_CFA_nop
7542 static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt
=
7544 elf_i386_nacl_plt0_entry
, /* plt0_entry */
7545 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
7546 2, /* plt0_got1_offset */
7547 8, /* plt0_got2_offset */
7548 elf_i386_nacl_plt_entry
, /* plt_entry */
7549 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
7550 2, /* plt_got_offset */
7551 33, /* plt_reloc_offset */
7552 38, /* plt_plt_offset */
7553 32, /* plt_lazy_offset */
7554 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
7555 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
7556 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
7557 sizeof (elf_i386_nacl_eh_frame_plt
) /* eh_frame_plt_size */
7560 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
7562 0x90, /* plt0_pad_byte: nop insn */
7567 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
7569 /* Set the right machine number for a NaCl i386 ELF32 file. */
7570 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
7574 #undef elf_backend_arch_data
7575 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
7577 #undef elf_backend_object_p
7578 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
7579 #undef elf_backend_modify_segment_map
7580 #define elf_backend_modify_segment_map nacl_modify_segment_map
7581 #undef elf_backend_modify_program_headers
7582 #define elf_backend_modify_program_headers nacl_modify_program_headers
7583 #undef elf_backend_final_write_processing
7584 #define elf_backend_final_write_processing nacl_final_write_processing
7586 #include "elf32-target.h"
7588 /* Restore defaults. */
7589 #undef elf_backend_object_p
7590 #undef elf_backend_modify_segment_map
7591 #undef elf_backend_modify_program_headers
7592 #undef elf_backend_final_write_processing
7594 /* VxWorks support. */
7596 #undef TARGET_LITTLE_SYM
7597 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
7598 #undef TARGET_LITTLE_NAME
7599 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
7601 #undef ELF_MAXPAGESIZE
7602 #define ELF_MAXPAGESIZE 0x1000
7603 #undef elf_backend_plt_alignment
7604 #define elf_backend_plt_alignment 4
7606 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
7608 0x90, /* plt0_pad_byte */
7612 #undef elf_backend_arch_data
7613 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
7615 #undef elf_backend_relocs_compatible
7616 #undef elf_backend_add_symbol_hook
7617 #define elf_backend_add_symbol_hook \
7618 elf_vxworks_add_symbol_hook
7619 #undef elf_backend_link_output_symbol_hook
7620 #define elf_backend_link_output_symbol_hook \
7621 elf_vxworks_link_output_symbol_hook
7622 #undef elf_backend_emit_relocs
7623 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
7624 #undef elf_backend_final_write_processing
7625 #define elf_backend_final_write_processing \
7626 elf_vxworks_final_write_processing
7627 #undef elf_backend_static_tls_alignment
7629 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7631 #undef elf_backend_want_plt_sym
7632 #define elf_backend_want_plt_sym 1
7635 #define elf32_bed elf32_i386_vxworks_bed
7637 #include "elf32-target.h"