1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 /* 386 uses REL relocations instead of RELA. */
37 static reloc_howto_type elf_howto_table
[]=
39 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
40 bfd_elf_generic_reloc
, "R_386_NONE",
41 TRUE
, 0x00000000, 0x00000000, FALSE
),
42 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
43 bfd_elf_generic_reloc
, "R_386_32",
44 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
45 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
46 bfd_elf_generic_reloc
, "R_386_PC32",
47 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
48 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
49 bfd_elf_generic_reloc
, "R_386_GOT32",
50 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
51 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_386_PLT32",
53 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
54 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
55 bfd_elf_generic_reloc
, "R_386_COPY",
56 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
57 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
58 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
59 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
60 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
62 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
63 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_386_RELATIVE",
65 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
66 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_386_GOTOFF",
68 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
69 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_386_GOTPC",
71 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
73 /* We have a gap in the reloc numbers here.
74 R_386_standard counts the number up to this point, and
75 R_386_ext_offset is the value to subtract from a reloc type of
76 R_386_16 thru R_386_PC8 to form an index into this table. */
77 #define R_386_standard (R_386_GOTPC + 1)
78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80 /* These relocs are a GNU extension. */
81 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
83 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
84 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_386_TLS_IE",
86 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
87 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
89 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
90 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_386_TLS_LE",
92 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
93 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_386_TLS_GD",
95 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
96 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
98 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
99 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_386_16",
101 TRUE
, 0xffff, 0xffff, FALSE
),
102 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_386_PC16",
104 TRUE
, 0xffff, 0xffff, TRUE
),
105 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_386_8",
107 TRUE
, 0xff, 0xff, FALSE
),
108 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
109 bfd_elf_generic_reloc
, "R_386_PC8",
110 TRUE
, 0xff, 0xff, TRUE
),
112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
114 /* These are common with Solaris TLS implementation. */
115 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
117 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
118 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
119 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
120 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
121 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
123 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
124 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
125 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
126 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
127 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
129 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
130 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
132 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
135 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
136 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
137 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
138 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
140 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
141 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
142 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
143 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT
, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE
, /* pc_relative */
158 complain_overflow_dont
, /* complain_on_overflow */
159 NULL
, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE
, /* partial_inplace */
164 FALSE
), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY
, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE
, /* pc_relative */
173 complain_overflow_dont
, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE
, /* partial_inplace */
179 FALSE
) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type
*
193 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
194 bfd_reloc_code_real_type code
)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table
[R_386_NONE
];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table
[R_386_32
];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table
[R_386_32
];
210 case BFD_RELOC_32_PCREL
:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table
[R_386_PC32
];
214 case BFD_RELOC_386_GOT32
:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table
[R_386_GOT32
];
218 case BFD_RELOC_386_PLT32
:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table
[R_386_PLT32
];
222 case BFD_RELOC_386_COPY
:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table
[R_386_COPY
];
226 case BFD_RELOC_386_GLOB_DAT
:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table
[R_386_GLOB_DAT
];
230 case BFD_RELOC_386_JUMP_SLOT
:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table
[R_386_JUMP_SLOT
];
234 case BFD_RELOC_386_RELATIVE
:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table
[R_386_RELATIVE
];
238 case BFD_RELOC_386_GOTOFF
:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table
[R_386_GOTOFF
];
242 case BFD_RELOC_386_GOTPC
:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table
[R_386_GOTPC
];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF
:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
251 case BFD_RELOC_386_TLS_IE
:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
255 case BFD_RELOC_386_TLS_GOTIE
:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
259 case BFD_RELOC_386_TLS_LE
:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
263 case BFD_RELOC_386_TLS_GD
:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
267 case BFD_RELOC_386_TLS_LDM
:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
275 case BFD_RELOC_16_PCREL
:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
283 case BFD_RELOC_8_PCREL
:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32
:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
292 case BFD_RELOC_386_TLS_IE_32
:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
296 case BFD_RELOC_386_TLS_LE_32
:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
300 case BFD_RELOC_386_TLS_DTPMOD32
:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
304 case BFD_RELOC_386_TLS_DTPOFF32
:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
308 case BFD_RELOC_386_TLS_TPOFF32
:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
312 case BFD_RELOC_386_TLS_GOTDESC
:
313 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
314 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
316 case BFD_RELOC_386_TLS_DESC_CALL
:
317 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
318 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
320 case BFD_RELOC_386_TLS_DESC
:
321 TRACE ("BFD_RELOC_386_TLS_DESC");
322 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
324 case BFD_RELOC_386_IRELATIVE
:
325 TRACE ("BFD_RELOC_386_IRELATIVE");
326 return &elf_howto_table
[R_386_IRELATIVE
];
328 case BFD_RELOC_VTABLE_INHERIT
:
329 TRACE ("BFD_RELOC_VTABLE_INHERIT");
330 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
332 case BFD_RELOC_VTABLE_ENTRY
:
333 TRACE ("BFD_RELOC_VTABLE_ENTRY");
334 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
344 static reloc_howto_type
*
345 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
350 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
351 if (elf_howto_table
[i
].name
!= NULL
352 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
353 return &elf_howto_table
[i
];
358 static reloc_howto_type
*
359 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
363 if ((indx
= r_type
) >= R_386_standard
364 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
365 >= R_386_ext
- R_386_standard
)
366 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
367 >= R_386_irelative
- R_386_ext
)
368 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
369 >= R_386_vt
- R_386_irelative
))
371 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
375 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
376 return &elf_howto_table
[indx
];
380 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
382 Elf_Internal_Rela
*dst
)
384 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
385 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
388 /* Return whether a symbol name implies a local label. The UnixWare
389 2.1 cc generates temporary symbols that start with .X, so we
390 recognize them here. FIXME: do other SVR4 compilers also use .X?.
391 If so, we should move the .X recognition into
392 _bfd_elf_is_local_label_name. */
395 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
397 if (name
[0] == '.' && name
[1] == 'X')
400 return _bfd_elf_is_local_label_name (abfd
, name
);
403 /* Support for core dump NOTE sections. */
406 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
411 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
413 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
419 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
422 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
426 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
430 switch (note
->descsz
)
435 case 144: /* Linux/i386 */
437 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
440 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
450 /* Make a ".reg/999" section. */
451 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
452 size
, note
->descpos
+ offset
);
456 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
458 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
460 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
465 elf_tdata (abfd
)->core_program
466 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
467 elf_tdata (abfd
)->core_command
468 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
472 switch (note
->descsz
)
477 case 124: /* Linux/i386 elf_prpsinfo. */
478 elf_tdata (abfd
)->core_program
479 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
480 elf_tdata (abfd
)->core_command
481 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
485 /* Note that for some reason, a spurious space is tacked
486 onto the end of the args in some (at least one anyway)
487 implementations, so strip it off if it exists. */
489 char *command
= elf_tdata (abfd
)->core_command
;
490 int n
= strlen (command
);
492 if (0 < n
&& command
[n
- 1] == ' ')
493 command
[n
- 1] = '\0';
499 /* Functions for the i386 ELF linker.
501 In order to gain some understanding of code in this file without
502 knowing all the intricate details of the linker, note the
505 Functions named elf_i386_* are called by external routines, other
506 functions are only called locally. elf_i386_* functions appear
507 in this file more or less in the order in which they are called
508 from external routines. eg. elf_i386_check_relocs is called
509 early in the link process, elf_i386_finish_dynamic_sections is
510 one of the last functions. */
513 /* The name of the dynamic interpreter. This is put in the .interp
516 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
518 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
519 copying dynamic variables from a shared lib into an app's dynbss
520 section, and instead use a dynamic relocation to point into the
522 #define ELIMINATE_COPY_RELOCS 1
524 /* The size in bytes of an entry in the procedure linkage table. */
526 #define PLT_ENTRY_SIZE 16
528 /* The first entry in an absolute procedure linkage table looks like
529 this. See the SVR4 ABI i386 supplement to see how this works.
530 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
532 static const bfd_byte elf_i386_plt0_entry
[12] =
534 0xff, 0x35, /* pushl contents of address */
535 0, 0, 0, 0, /* replaced with address of .got + 4. */
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0 /* replaced with address of .got + 8. */
540 /* Subsequent entries in an absolute procedure linkage table look like
543 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
547 0x68, /* pushl immediate */
548 0, 0, 0, 0, /* replaced with offset into relocation table. */
549 0xe9, /* jmp relative */
550 0, 0, 0, 0 /* replaced with offset to start of .plt. */
553 /* The first entry in a PIC procedure linkage table look like this.
554 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
556 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
558 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
559 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
562 /* Subsequent entries in a PIC procedure linkage table look like this. */
564 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
566 0xff, 0xa3, /* jmp *offset(%ebx) */
567 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
568 0x68, /* pushl immediate */
569 0, 0, 0, 0, /* replaced with offset into relocation table. */
570 0xe9, /* jmp relative */
571 0, 0, 0, 0 /* replaced with offset to start of .plt. */
574 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
575 for the PLTResolve stub and then for each PLT entry. */
576 #define PLTRESOLVE_RELOCS_SHLIB 0
577 #define PLTRESOLVE_RELOCS 2
578 #define PLT_NON_JUMP_SLOT_RELOCS 2
580 /* The i386 linker needs to keep track of the number of relocs that it
581 decides to copy as dynamic relocs in check_relocs for each symbol.
582 This is so that it can later discard them if they are found to be
583 unnecessary. We store the information in a field extending the
584 regular ELF linker hash table. */
586 struct elf_i386_dyn_relocs
588 struct elf_i386_dyn_relocs
*next
;
590 /* The input section of the reloc. */
593 /* Total number of relocs copied for the input section. */
596 /* Number of pc-relative relocs copied for the input section. */
597 bfd_size_type pc_count
;
600 /* i386 ELF linker hash entry. */
602 struct elf_i386_link_hash_entry
604 struct elf_link_hash_entry elf
;
606 /* Track dynamic relocs copied for this symbol. */
607 struct elf_i386_dyn_relocs
*dyn_relocs
;
609 #define GOT_UNKNOWN 0
613 #define GOT_TLS_IE_POS 5
614 #define GOT_TLS_IE_NEG 6
615 #define GOT_TLS_IE_BOTH 7
616 #define GOT_TLS_GDESC 8
617 #define GOT_TLS_GD_BOTH_P(type) \
618 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
619 #define GOT_TLS_GD_P(type) \
620 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
621 #define GOT_TLS_GDESC_P(type) \
622 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
623 #define GOT_TLS_GD_ANY_P(type) \
624 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
625 unsigned char tls_type
;
627 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
628 starting at the end of the jump table. */
632 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
634 struct elf_i386_obj_tdata
636 struct elf_obj_tdata root
;
638 /* tls_type for each local got entry. */
639 char *local_got_tls_type
;
641 /* GOTPLT entries for TLS descriptors. */
642 bfd_vma
*local_tlsdesc_gotent
;
645 #define elf_i386_tdata(abfd) \
646 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
648 #define elf_i386_local_got_tls_type(abfd) \
649 (elf_i386_tdata (abfd)->local_got_tls_type)
651 #define elf_i386_local_tlsdesc_gotent(abfd) \
652 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
654 #define is_i386_elf(bfd) \
655 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
656 && elf_tdata (bfd) != NULL \
657 && elf_object_id (bfd) == I386_ELF_TDATA)
660 elf_i386_mkobject (bfd
*abfd
)
662 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
666 /* i386 ELF linker hash table. */
668 struct elf_i386_link_hash_table
670 struct elf_link_hash_table elf
;
672 /* Short-cuts to get to dynamic linker sections. */
685 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
688 /* True if the target system is VxWorks. */
691 /* Value used to fill the last word of the first plt entry. */
692 bfd_byte plt0_pad_byte
;
694 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
695 bfd_vma next_tls_desc_index
;
698 bfd_signed_vma refcount
;
702 /* The amount of space used by the reserved portion of the sgotplt
703 section, plus whatever space is used by the jump slots. */
704 bfd_vma sgotplt_jump_table_size
;
706 /* Small local sym to section mapping cache. */
707 struct sym_sec_cache sym_sec
;
709 /* _TLS_MODULE_BASE_ symbol. */
710 struct bfd_link_hash_entry
*tls_module_base
;
712 /* Used by local STT_GNU_IFUNC symbols. */
713 htab_t loc_hash_table
;
714 void *loc_hash_memory
;
717 /* Get the i386 ELF linker hash table from a link_info structure. */
719 #define elf_i386_hash_table(p) \
720 ((struct elf_i386_link_hash_table *) ((p)->hash))
722 #define elf_i386_compute_jump_table_size(htab) \
723 ((htab)->next_tls_desc_index * 4)
725 /* Create an entry in an i386 ELF linker hash table. */
727 static struct bfd_hash_entry
*
728 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
729 struct bfd_hash_table
*table
,
732 /* Allocate the structure if it has not already been allocated by a
736 entry
= bfd_hash_allocate (table
,
737 sizeof (struct elf_i386_link_hash_entry
));
742 /* Call the allocation method of the superclass. */
743 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
746 struct elf_i386_link_hash_entry
*eh
;
748 eh
= (struct elf_i386_link_hash_entry
*) entry
;
749 eh
->dyn_relocs
= NULL
;
750 eh
->tls_type
= GOT_UNKNOWN
;
751 eh
->tlsdesc_got
= (bfd_vma
) -1;
758 elf_i386_local_hash (int id
, int r_sym
)
760 return ((((id
& 0xff) << 24) | ((id
& 0xff00) << 8))
761 ^ r_sym
^ (id
>> 16));
764 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
765 for local symbol so that we can handle local STT_GNU_IFUNC symbols
766 as global symbol. We reuse indx and dynstr_index for local symbol
767 hash since they aren't used by global symbols in this backend. */
770 elf_i386_local_htab_hash (const void *ptr
)
772 struct elf_link_hash_entry
*h
773 = (struct elf_link_hash_entry
*) ptr
;
774 return elf_i386_local_hash (h
->indx
, h
->dynstr_index
);
777 /* Compare local hash entries. */
780 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
782 struct elf_link_hash_entry
*h1
783 = (struct elf_link_hash_entry
*) ptr1
;
784 struct elf_link_hash_entry
*h2
785 = (struct elf_link_hash_entry
*) ptr2
;
787 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
790 /* Find and/or create a hash entry for local symbol. */
792 static struct elf_link_hash_entry
*
793 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
794 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
797 struct elf_i386_link_hash_entry e
, *ret
;
798 asection
*sec
= abfd
->sections
;
799 hashval_t h
= elf_i386_local_hash (sec
->id
,
800 ELF32_R_SYM (rel
->r_info
));
803 e
.elf
.indx
= sec
->id
;
804 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
805 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
806 create
? INSERT
: NO_INSERT
);
813 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
817 ret
= (struct elf_i386_link_hash_entry
*)
818 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
819 sizeof (struct elf_i386_link_hash_entry
));
822 memset (ret
, 0, sizeof (*ret
));
823 ret
->elf
.indx
= sec
->id
;
824 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
825 ret
->elf
.dynindx
= -1;
826 ret
->elf
.plt
.offset
= (bfd_vma
) -1;
827 ret
->elf
.got
.offset
= (bfd_vma
) -1;
833 /* Create an i386 ELF linker hash table. */
835 static struct bfd_link_hash_table
*
836 elf_i386_link_hash_table_create (bfd
*abfd
)
838 struct elf_i386_link_hash_table
*ret
;
839 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
841 ret
= bfd_malloc (amt
);
845 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
846 elf_i386_link_hash_newfunc
,
847 sizeof (struct elf_i386_link_hash_entry
)))
863 ret
->irelifunc
= NULL
;
864 ret
->tls_ldm_got
.refcount
= 0;
865 ret
->next_tls_desc_index
= 0;
866 ret
->sgotplt_jump_table_size
= 0;
867 ret
->sym_sec
.abfd
= NULL
;
869 ret
->srelplt2
= NULL
;
870 ret
->plt0_pad_byte
= 0;
871 ret
->tls_module_base
= NULL
;
873 ret
->loc_hash_table
= htab_try_create (1024,
874 elf_i386_local_htab_hash
,
875 elf_i386_local_htab_eq
,
877 ret
->loc_hash_memory
= objalloc_create ();
878 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
884 return &ret
->elf
.root
;
887 /* Destroy an i386 ELF linker hash table. */
890 elf_i386_link_hash_table_free (struct bfd_link_hash_table
*hash
)
892 struct elf_i386_link_hash_table
*htab
893 = (struct elf_i386_link_hash_table
*) hash
;
895 if (htab
->loc_hash_table
)
896 htab_delete (htab
->loc_hash_table
);
897 if (htab
->loc_hash_memory
)
898 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
899 _bfd_generic_link_hash_table_free (hash
);
902 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
903 shortcuts to them in our hash table. */
905 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
906 shortcuts to them in our hash table. */
909 elf_i386_create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
911 struct elf_i386_link_hash_table
*htab
;
913 if (! _bfd_elf_create_got_section (dynobj
, info
))
916 htab
= elf_i386_hash_table (info
);
917 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
918 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
919 if (!htab
->sgot
|| !htab
->sgotplt
)
922 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
923 (SEC_ALLOC
| SEC_LOAD
928 if (htab
->srelgot
== NULL
929 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
934 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
935 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
939 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
941 struct elf_i386_link_hash_table
*htab
;
943 htab
= elf_i386_hash_table (info
);
944 if (!htab
->sgot
&& !elf_i386_create_got_section (dynobj
, info
))
947 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
950 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
951 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
952 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
954 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
956 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
957 || (!info
->shared
&& !htab
->srelbss
))
961 && !elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
967 /* Copy the extra info we tack onto an elf_link_hash_entry. */
970 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
971 struct elf_link_hash_entry
*dir
,
972 struct elf_link_hash_entry
*ind
)
974 struct elf_i386_link_hash_entry
*edir
, *eind
;
976 edir
= (struct elf_i386_link_hash_entry
*) dir
;
977 eind
= (struct elf_i386_link_hash_entry
*) ind
;
979 if (eind
->dyn_relocs
!= NULL
)
981 if (edir
->dyn_relocs
!= NULL
)
983 struct elf_i386_dyn_relocs
**pp
;
984 struct elf_i386_dyn_relocs
*p
;
986 /* Add reloc counts against the indirect sym to the direct sym
987 list. Merge any entries against the same section. */
988 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
990 struct elf_i386_dyn_relocs
*q
;
992 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
993 if (q
->sec
== p
->sec
)
995 q
->pc_count
+= p
->pc_count
;
996 q
->count
+= p
->count
;
1003 *pp
= edir
->dyn_relocs
;
1006 edir
->dyn_relocs
= eind
->dyn_relocs
;
1007 eind
->dyn_relocs
= NULL
;
1010 if (ind
->root
.type
== bfd_link_hash_indirect
1011 && dir
->got
.refcount
<= 0)
1013 edir
->tls_type
= eind
->tls_type
;
1014 eind
->tls_type
= GOT_UNKNOWN
;
1017 if (ELIMINATE_COPY_RELOCS
1018 && ind
->root
.type
!= bfd_link_hash_indirect
1019 && dir
->dynamic_adjusted
)
1021 /* If called to transfer flags for a weakdef during processing
1022 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1023 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1024 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1025 dir
->ref_regular
|= ind
->ref_regular
;
1026 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1027 dir
->needs_plt
|= ind
->needs_plt
;
1028 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1031 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1041 /* Return TRUE if the TLS access code sequence support transition
1045 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1047 Elf_Internal_Shdr
*symtab_hdr
,
1048 struct elf_link_hash_entry
**sym_hashes
,
1049 unsigned int r_type
,
1050 const Elf_Internal_Rela
*rel
,
1051 const Elf_Internal_Rela
*relend
)
1053 unsigned int val
, type
;
1054 unsigned long r_symndx
;
1055 struct elf_link_hash_entry
*h
;
1058 /* Get the section contents. */
1059 if (contents
== NULL
)
1061 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1062 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1065 /* FIXME: How to better handle error condition? */
1066 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1069 /* Cache the section contents for elf_link_input_bfd. */
1070 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1074 offset
= rel
->r_offset
;
1079 if (offset
< 2 || (rel
+ 1) >= relend
)
1082 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1083 if (r_type
== R_386_TLS_GD
)
1085 /* Check transition from GD access model. Only
1086 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1087 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1088 can transit to different access model. */
1089 if ((offset
+ 10) > sec
->size
||
1090 (type
!= 0x8d && type
!= 0x04))
1093 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1096 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1100 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1103 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1108 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1109 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1112 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1118 /* Check transition from LD access model. Only
1119 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1120 can transit to different access model. */
1121 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1124 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1125 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1129 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1132 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1133 if (r_symndx
< symtab_hdr
->sh_info
)
1136 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1137 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1138 may be versioned. */
1140 && h
->root
.root
.string
!= NULL
1141 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1142 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1143 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1147 /* Check transition from IE access model:
1148 movl foo@indntpoff(%rip), %eax
1149 movl foo@indntpoff(%rip), %reg
1150 addl foo@indntpoff(%rip), %reg
1153 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1156 /* Check "movl foo@tpoff(%rip), %eax" first. */
1157 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1164 /* Check movl|addl foo@tpoff(%rip), %reg. */
1165 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1166 return ((type
== 0x8b || type
== 0x03)
1167 && (val
& 0xc7) == 0x05);
1169 case R_386_TLS_GOTIE
:
1170 case R_386_TLS_IE_32
:
1171 /* Check transition from {IE_32,GOTIE} access model:
1172 subl foo@{tpoff,gontoff}(%reg1), %reg2
1173 movl foo@{tpoff,gontoff}(%reg1), %reg2
1174 addl foo@{tpoff,gontoff}(%reg1), %reg2
1177 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1180 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1181 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1184 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1185 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1187 case R_386_TLS_GOTDESC
:
1188 /* Check transition from GDesc access model:
1189 leal x@tlsdesc(%ebx), %eax
1191 Make sure it's a leal adding ebx to a 32-bit offset
1192 into any register, although it's probably almost always
1195 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1198 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1201 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1202 return (val
& 0xc7) == 0x83;
1204 case R_386_TLS_DESC_CALL
:
1205 /* Check transition from GDesc access model:
1206 call *x@tlsdesc(%rax)
1208 if (offset
+ 2 <= sec
->size
)
1210 /* Make sure that it's a call *x@tlsdesc(%rax). */
1211 static i386_opcode16 call
= { { 0xff, 0x10 } };
1212 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
1222 /* Return TRUE if the TLS access transition is OK or no transition
1223 will be performed. Update R_TYPE if there is a transition. */
1226 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1227 asection
*sec
, bfd_byte
*contents
,
1228 Elf_Internal_Shdr
*symtab_hdr
,
1229 struct elf_link_hash_entry
**sym_hashes
,
1230 unsigned int *r_type
, int tls_type
,
1231 const Elf_Internal_Rela
*rel
,
1232 const Elf_Internal_Rela
*relend
,
1233 struct elf_link_hash_entry
*h
)
1235 unsigned int from_type
= *r_type
;
1236 unsigned int to_type
= from_type
;
1237 bfd_boolean check
= TRUE
;
1242 case R_386_TLS_GOTDESC
:
1243 case R_386_TLS_DESC_CALL
:
1244 case R_386_TLS_IE_32
:
1246 case R_386_TLS_GOTIE
:
1250 to_type
= R_386_TLS_LE_32
;
1251 else if (from_type
!= R_386_TLS_IE
1252 && from_type
!= R_386_TLS_GOTIE
)
1253 to_type
= R_386_TLS_IE_32
;
1256 /* When we are called from elf_i386_relocate_section, CONTENTS
1257 isn't NULL and there may be additional transitions based on
1259 if (contents
!= NULL
)
1261 unsigned int new_to_type
= to_type
;
1266 && (tls_type
& GOT_TLS_IE
))
1267 new_to_type
= R_386_TLS_LE_32
;
1269 if (to_type
== R_386_TLS_GD
1270 || to_type
== R_386_TLS_GOTDESC
1271 || to_type
== R_386_TLS_DESC_CALL
)
1273 if (tls_type
== GOT_TLS_IE_POS
)
1274 new_to_type
= R_386_TLS_GOTIE
;
1275 else if (tls_type
& GOT_TLS_IE
)
1276 new_to_type
= R_386_TLS_IE_32
;
1279 /* We checked the transition before when we were called from
1280 elf_i386_check_relocs. We only want to check the new
1281 transition which hasn't been checked before. */
1282 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1283 to_type
= new_to_type
;
1290 to_type
= R_386_TLS_LE_32
;
1297 /* Return TRUE if there is no transition. */
1298 if (from_type
== to_type
)
1301 /* Check if the transition can be performed. */
1303 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1304 symtab_hdr
, sym_hashes
,
1305 from_type
, rel
, relend
))
1307 reloc_howto_type
*from
, *to
;
1309 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1310 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1312 (*_bfd_error_handler
)
1313 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1314 "in section `%A' failed"),
1315 abfd
, sec
, from
->name
, to
->name
,
1316 h
? h
->root
.root
.string
: "a local symbol",
1317 (unsigned long) rel
->r_offset
);
1318 bfd_set_error (bfd_error_bad_value
);
1326 /* Look through the relocs for a section during the first phase, and
1327 calculate needed space in the global offset table, procedure linkage
1328 table, and dynamic reloc sections. */
1331 elf_i386_check_relocs (bfd
*abfd
,
1332 struct bfd_link_info
*info
,
1334 const Elf_Internal_Rela
*relocs
)
1336 struct elf_i386_link_hash_table
*htab
;
1337 Elf_Internal_Shdr
*symtab_hdr
;
1338 struct elf_link_hash_entry
**sym_hashes
;
1339 const Elf_Internal_Rela
*rel
;
1340 const Elf_Internal_Rela
*rel_end
;
1342 Elf_Internal_Sym
*isymbuf
;
1344 if (info
->relocatable
)
1347 BFD_ASSERT (is_i386_elf (abfd
));
1349 htab
= elf_i386_hash_table (info
);
1350 symtab_hdr
= &elf_symtab_hdr (abfd
);
1351 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1352 sym_hashes
= elf_sym_hashes (abfd
);
1356 rel_end
= relocs
+ sec
->reloc_count
;
1357 for (rel
= relocs
; rel
< rel_end
; rel
++)
1359 unsigned int r_type
;
1360 unsigned long r_symndx
;
1361 struct elf_link_hash_entry
*h
;
1363 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1364 r_type
= ELF32_R_TYPE (rel
->r_info
);
1366 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1368 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1374 if (r_symndx
< symtab_hdr
->sh_info
)
1376 /* A local symbol. */
1377 Elf_Internal_Sym
*isym
;
1379 /* Read this BFD's local symbols. */
1380 if (isymbuf
== NULL
)
1382 if (isymbuf
== NULL
)
1383 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
1384 symtab_hdr
->sh_info
, 0,
1386 if (isymbuf
== NULL
)
1390 /* Check relocation against local STT_GNU_IFUNC symbol. */
1391 isym
= isymbuf
+ r_symndx
;
1392 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1394 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
,
1399 /* Fake a STT_GNU_IFUNC symbol. */
1400 h
->type
= STT_GNU_IFUNC
;
1403 h
->forced_local
= 1;
1404 h
->root
.type
= bfd_link_hash_defined
;
1411 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1412 while (h
->root
.type
== bfd_link_hash_indirect
1413 || h
->root
.type
== bfd_link_hash_warning
)
1414 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1419 /* Create the ifunc sections for static executables. If we
1420 never see an indirect function symbol nor we are building
1421 a static executable, those sections will be empty and
1422 won't appear in output. */
1433 if (htab
->irelifunc
== NULL
&& htab
->iplt
== NULL
)
1435 if (!_bfd_elf_create_ifunc_sections (abfd
, info
))
1440 htab
->irelifunc
= bfd_get_section_by_name (abfd
,
1442 if (!htab
->irelifunc
)
1447 htab
->iplt
= bfd_get_section_by_name (abfd
, ".iplt");
1448 htab
->irelplt
= bfd_get_section_by_name (abfd
,
1450 htab
->igotplt
= bfd_get_section_by_name (abfd
,
1461 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1462 it here if it is defined in a non-shared object. */
1463 if (h
->type
== STT_GNU_IFUNC
1466 /* It is referenced by a non-shared object. */
1469 /* STT_GNU_IFUNC symbol must go through PLT. */
1470 h
->plt
.refcount
+= 1;
1472 /* STT_GNU_IFUNC needs dynamic sections. */
1473 if (htab
->elf
.dynobj
== NULL
)
1474 htab
->elf
.dynobj
= abfd
;
1479 (*_bfd_error_handler
)
1480 (_("%B: relocation %s against STT_GNU_IFUNC "
1481 "symbol `%s' isn't handled by %s"), abfd
,
1482 elf_howto_table
[r_type
].name
,
1483 h
!= NULL
? h
->root
.root
.string
: "a local symbol",
1485 bfd_set_error (bfd_error_bad_value
);
1490 h
->pointer_equality_needed
= 1;
1493 struct elf_i386_dyn_relocs
*p
;
1494 struct elf_i386_dyn_relocs
**head
;
1496 /* We must copy these reloc types into the
1497 output file. Create a reloc section in
1498 dynobj and make room for this reloc. */
1501 if (htab
->elf
.dynobj
== NULL
)
1502 htab
->elf
.dynobj
= abfd
;
1504 sreloc
= _bfd_elf_make_dynamic_reloc_section
1505 (sec
, htab
->elf
.dynobj
, 2, abfd
, FALSE
);
1511 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1513 if (p
== NULL
|| p
->sec
!= sec
)
1515 bfd_size_type amt
= sizeof *p
;
1516 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1538 h
->got
.refcount
+= 1;
1539 if (htab
->sgot
== NULL
1540 && !elf_i386_create_got_section (htab
->elf
.dynobj
,
1550 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1551 symtab_hdr
, sym_hashes
,
1552 &r_type
, GOT_UNKNOWN
,
1559 htab
->tls_ldm_got
.refcount
+= 1;
1563 /* This symbol requires a procedure linkage table entry. We
1564 actually build the entry in adjust_dynamic_symbol,
1565 because this might be a case of linking PIC code which is
1566 never referenced by a dynamic object, in which case we
1567 don't need to generate a procedure linkage table entry
1570 /* If this is a local symbol, we resolve it directly without
1571 creating a procedure linkage table entry. */
1576 h
->plt
.refcount
+= 1;
1579 case R_386_TLS_IE_32
:
1581 case R_386_TLS_GOTIE
:
1583 info
->flags
|= DF_STATIC_TLS
;
1588 case R_386_TLS_GOTDESC
:
1589 case R_386_TLS_DESC_CALL
:
1590 /* This symbol requires a global offset table entry. */
1592 int tls_type
, old_tls_type
;
1597 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1598 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1599 case R_386_TLS_GOTDESC
:
1600 case R_386_TLS_DESC_CALL
:
1601 tls_type
= GOT_TLS_GDESC
; break;
1602 case R_386_TLS_IE_32
:
1603 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1604 tls_type
= GOT_TLS_IE_NEG
;
1606 /* If this is a GD->IE transition, we may use either of
1607 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1608 tls_type
= GOT_TLS_IE
;
1611 case R_386_TLS_GOTIE
:
1612 tls_type
= GOT_TLS_IE_POS
; break;
1617 h
->got
.refcount
+= 1;
1618 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1622 bfd_signed_vma
*local_got_refcounts
;
1624 /* This is a global offset table entry for a local symbol. */
1625 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1626 if (local_got_refcounts
== NULL
)
1630 size
= symtab_hdr
->sh_info
;
1631 size
*= (sizeof (bfd_signed_vma
)
1632 + sizeof (bfd_vma
) + sizeof(char));
1633 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1634 if (local_got_refcounts
== NULL
)
1636 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1637 elf_i386_local_tlsdesc_gotent (abfd
)
1638 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1639 elf_i386_local_got_tls_type (abfd
)
1640 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1642 local_got_refcounts
[r_symndx
] += 1;
1643 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1646 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1647 tls_type
|= old_tls_type
;
1648 /* If a TLS symbol is accessed using IE at least once,
1649 there is no point to use dynamic model for it. */
1650 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1651 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1652 || (tls_type
& GOT_TLS_IE
) == 0))
1654 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1655 tls_type
= old_tls_type
;
1656 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1657 && GOT_TLS_GD_ANY_P (tls_type
))
1658 tls_type
|= old_tls_type
;
1661 (*_bfd_error_handler
)
1662 (_("%B: `%s' accessed both as normal and "
1663 "thread local symbol"),
1665 h
? h
->root
.root
.string
: "<local>");
1670 if (old_tls_type
!= tls_type
)
1673 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1675 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1683 if (htab
->sgot
== NULL
)
1685 if (htab
->elf
.dynobj
== NULL
)
1686 htab
->elf
.dynobj
= abfd
;
1687 if (!elf_i386_create_got_section (htab
->elf
.dynobj
, info
))
1690 if (r_type
!= R_386_TLS_IE
)
1694 case R_386_TLS_LE_32
:
1698 info
->flags
|= DF_STATIC_TLS
;
1703 if (h
!= NULL
&& info
->executable
)
1705 /* If this reloc is in a read-only section, we might
1706 need a copy reloc. We can't check reliably at this
1707 stage whether the section is read-only, as input
1708 sections have not yet been mapped to output sections.
1709 Tentatively set the flag for now, and correct in
1710 adjust_dynamic_symbol. */
1713 /* We may need a .plt entry if the function this reloc
1714 refers to is in a shared lib. */
1715 h
->plt
.refcount
+= 1;
1716 if (r_type
!= R_386_PC32
)
1717 h
->pointer_equality_needed
= 1;
1720 /* If we are creating a shared library, and this is a reloc
1721 against a global symbol, or a non PC relative reloc
1722 against a local symbol, then we need to copy the reloc
1723 into the shared library. However, if we are linking with
1724 -Bsymbolic, we do not need to copy a reloc against a
1725 global symbol which is defined in an object we are
1726 including in the link (i.e., DEF_REGULAR is set). At
1727 this point we have not seen all the input files, so it is
1728 possible that DEF_REGULAR is not set now but will be set
1729 later (it is never cleared). In case of a weak definition,
1730 DEF_REGULAR may be cleared later by a strong definition in
1731 a shared library. We account for that possibility below by
1732 storing information in the relocs_copied field of the hash
1733 table entry. A similar situation occurs when creating
1734 shared libraries and symbol visibility changes render the
1737 If on the other hand, we are creating an executable, we
1738 may need to keep relocations for symbols satisfied by a
1739 dynamic library if we manage to avoid copy relocs for the
1742 && (sec
->flags
& SEC_ALLOC
) != 0
1743 && (r_type
!= R_386_PC32
1745 && (! SYMBOLIC_BIND (info
, h
)
1746 || h
->root
.type
== bfd_link_hash_defweak
1747 || !h
->def_regular
))))
1748 || (ELIMINATE_COPY_RELOCS
1750 && (sec
->flags
& SEC_ALLOC
) != 0
1752 && (h
->root
.type
== bfd_link_hash_defweak
1753 || !h
->def_regular
)))
1755 struct elf_i386_dyn_relocs
*p
;
1756 struct elf_i386_dyn_relocs
**head
;
1758 /* We must copy these reloc types into the output file.
1759 Create a reloc section in dynobj and make room for
1763 if (htab
->elf
.dynobj
== NULL
)
1764 htab
->elf
.dynobj
= abfd
;
1766 sreloc
= _bfd_elf_make_dynamic_reloc_section
1767 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1773 /* If this is a global symbol, we count the number of
1774 relocations we need for this symbol. */
1777 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1782 /* Track dynamic relocs needed for local syms too.
1783 We really need local syms available to do this
1787 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1792 vpp
= &elf_section_data (s
)->local_dynrel
;
1793 head
= (struct elf_i386_dyn_relocs
**)vpp
;
1797 if (p
== NULL
|| p
->sec
!= sec
)
1799 bfd_size_type amt
= sizeof *p
;
1800 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1811 if (r_type
== R_386_PC32
)
1816 /* This relocation describes the C++ object vtable hierarchy.
1817 Reconstruct it for later use during GC. */
1818 case R_386_GNU_VTINHERIT
:
1819 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1823 /* This relocation describes which C++ vtable entries are actually
1824 used. Record for later use during GC. */
1825 case R_386_GNU_VTENTRY
:
1826 BFD_ASSERT (h
!= NULL
);
1828 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1840 /* Return the section that should be marked against GC for a given
1844 elf_i386_gc_mark_hook (asection
*sec
,
1845 struct bfd_link_info
*info
,
1846 Elf_Internal_Rela
*rel
,
1847 struct elf_link_hash_entry
*h
,
1848 Elf_Internal_Sym
*sym
)
1851 switch (ELF32_R_TYPE (rel
->r_info
))
1853 case R_386_GNU_VTINHERIT
:
1854 case R_386_GNU_VTENTRY
:
1858 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1861 /* Update the got entry reference counts for the section being removed. */
1864 elf_i386_gc_sweep_hook (bfd
*abfd
,
1865 struct bfd_link_info
*info
,
1867 const Elf_Internal_Rela
*relocs
)
1869 Elf_Internal_Shdr
*symtab_hdr
;
1870 struct elf_link_hash_entry
**sym_hashes
;
1871 bfd_signed_vma
*local_got_refcounts
;
1872 const Elf_Internal_Rela
*rel
, *relend
;
1874 if (info
->relocatable
)
1877 elf_section_data (sec
)->local_dynrel
= NULL
;
1879 symtab_hdr
= &elf_symtab_hdr (abfd
);
1880 sym_hashes
= elf_sym_hashes (abfd
);
1881 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1883 relend
= relocs
+ sec
->reloc_count
;
1884 for (rel
= relocs
; rel
< relend
; rel
++)
1886 unsigned long r_symndx
;
1887 unsigned int r_type
;
1888 struct elf_link_hash_entry
*h
= NULL
;
1890 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1891 if (r_symndx
>= symtab_hdr
->sh_info
)
1893 struct elf_i386_link_hash_entry
*eh
;
1894 struct elf_i386_dyn_relocs
**pp
;
1895 struct elf_i386_dyn_relocs
*p
;
1897 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1898 while (h
->root
.type
== bfd_link_hash_indirect
1899 || h
->root
.type
== bfd_link_hash_warning
)
1900 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1901 eh
= (struct elf_i386_link_hash_entry
*) h
;
1903 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1906 /* Everything must go for SEC. */
1912 r_type
= ELF32_R_TYPE (rel
->r_info
);
1913 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1914 symtab_hdr
, sym_hashes
,
1915 &r_type
, GOT_UNKNOWN
,
1922 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1923 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1927 case R_386_TLS_GOTDESC
:
1928 case R_386_TLS_DESC_CALL
:
1929 case R_386_TLS_IE_32
:
1931 case R_386_TLS_GOTIE
:
1935 if (h
->got
.refcount
> 0)
1936 h
->got
.refcount
-= 1;
1938 else if (local_got_refcounts
!= NULL
)
1940 if (local_got_refcounts
[r_symndx
] > 0)
1941 local_got_refcounts
[r_symndx
] -= 1;
1954 if (h
->plt
.refcount
> 0)
1955 h
->plt
.refcount
-= 1;
1967 /* Adjust a symbol defined by a dynamic object and referenced by a
1968 regular object. The current definition is in some section of the
1969 dynamic object, but we're not including those sections. We have to
1970 change the definition to something the rest of the link can
1974 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1975 struct elf_link_hash_entry
*h
)
1977 struct elf_i386_link_hash_table
*htab
;
1980 /* STT_GNU_IFUNC symbol must go through PLT. */
1981 if (h
->type
== STT_GNU_IFUNC
)
1983 if (h
->plt
.refcount
<= 0)
1985 h
->plt
.offset
= (bfd_vma
) -1;
1991 /* If this is a function, put it in the procedure linkage table. We
1992 will fill in the contents of the procedure linkage table later,
1993 when we know the address of the .got section. */
1994 if (h
->type
== STT_FUNC
1997 if (h
->plt
.refcount
<= 0
1998 || SYMBOL_CALLS_LOCAL (info
, h
)
1999 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2000 && h
->root
.type
== bfd_link_hash_undefweak
))
2002 /* This case can occur if we saw a PLT32 reloc in an input
2003 file, but the symbol was never referred to by a dynamic
2004 object, or if all references were garbage collected. In
2005 such a case, we don't actually need to build a procedure
2006 linkage table, and we can just do a PC32 reloc instead. */
2007 h
->plt
.offset
= (bfd_vma
) -1;
2014 /* It's possible that we incorrectly decided a .plt reloc was
2015 needed for an R_386_PC32 reloc to a non-function sym in
2016 check_relocs. We can't decide accurately between function and
2017 non-function syms in check-relocs; Objects loaded later in
2018 the link may change h->type. So fix it now. */
2019 h
->plt
.offset
= (bfd_vma
) -1;
2021 /* If this is a weak symbol, and there is a real definition, the
2022 processor independent code will have arranged for us to see the
2023 real definition first, and we can just use the same value. */
2024 if (h
->u
.weakdef
!= NULL
)
2026 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2027 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2028 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2029 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2030 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2031 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2035 /* This is a reference to a symbol defined by a dynamic object which
2036 is not a function. */
2038 /* If we are creating a shared library, we must presume that the
2039 only references to the symbol are via the global offset table.
2040 For such cases we need not do anything here; the relocations will
2041 be handled correctly by relocate_section. */
2045 /* If there are no references to this symbol that do not use the
2046 GOT, we don't need to generate a copy reloc. */
2047 if (!h
->non_got_ref
)
2050 /* If -z nocopyreloc was given, we won't generate them either. */
2051 if (info
->nocopyreloc
)
2057 htab
= elf_i386_hash_table (info
);
2059 /* If there aren't any dynamic relocs in read-only sections, then
2060 we can keep the dynamic relocs and avoid the copy reloc. This
2061 doesn't work on VxWorks, where we can not have dynamic relocations
2062 (other than copy and jump slot relocations) in an executable. */
2063 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
2065 struct elf_i386_link_hash_entry
* eh
;
2066 struct elf_i386_dyn_relocs
*p
;
2068 eh
= (struct elf_i386_link_hash_entry
*) h
;
2069 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2071 s
= p
->sec
->output_section
;
2072 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2085 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
2086 h
->root
.root
.string
);
2090 /* We must allocate the symbol in our .dynbss section, which will
2091 become part of the .bss section of the executable. There will be
2092 an entry for this symbol in the .dynsym section. The dynamic
2093 object will contain position independent code, so all references
2094 from the dynamic object to this symbol will go through the global
2095 offset table. The dynamic linker will use the .dynsym entry to
2096 determine the address it must put in the global offset table, so
2097 both the dynamic object and the regular object will refer to the
2098 same memory location for the variable. */
2100 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2101 copy the initial value out of the dynamic object and into the
2102 runtime process image. */
2103 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2105 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2111 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2114 /* Allocate space in .plt, .got and associated reloc sections for
2118 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2120 struct bfd_link_info
*info
;
2121 struct elf_i386_link_hash_table
*htab
;
2122 struct elf_i386_link_hash_entry
*eh
;
2123 struct elf_i386_dyn_relocs
*p
;
2125 if (h
->root
.type
== bfd_link_hash_indirect
)
2128 if (h
->root
.type
== bfd_link_hash_warning
)
2129 /* When warning symbols are created, they **replace** the "real"
2130 entry in the hash table, thus we never get to see the real
2131 symbol in a hash traversal. So look at it now. */
2132 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2133 eh
= (struct elf_i386_link_hash_entry
*) h
;
2135 info
= (struct bfd_link_info
*) inf
;
2136 htab
= elf_i386_hash_table (info
);
2138 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2139 here if it is defined and referenced in a non-shared object. */
2140 if (h
->type
== STT_GNU_IFUNC
2143 asection
*plt
, *gotplt
, *relplt
;
2145 /* Return and discard space for dynamic relocations against it if
2146 it is never referenced in a non-shared object. */
2147 if (!h
->ref_regular
)
2149 if (h
->plt
.refcount
> 0
2150 || h
->got
.refcount
> 0)
2152 h
->got
.offset
= (bfd_vma
) -1;
2153 eh
->dyn_relocs
= NULL
;
2157 /* When building a static executable, use .iplt, .igot.plt and
2158 .rel.iplt sections for STT_GNU_IFUNC symbols. */
2159 if (htab
->splt
!= NULL
)
2162 gotplt
= htab
->sgotplt
;
2163 relplt
= htab
->srelplt
;
2165 /* If this is the first .plt entry, make room for the special
2168 plt
->size
+= PLT_ENTRY_SIZE
;
2173 gotplt
= htab
->igotplt
;
2174 relplt
= htab
->irelplt
;
2177 /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need
2178 the original value for R_386_IRELATIVE. */
2179 h
->plt
.offset
= plt
->size
;
2181 /* Make room for this entry in the .plt/.iplt section. */
2182 plt
->size
+= PLT_ENTRY_SIZE
;
2184 /* We also need to make an entry in the .got.plt/.got.iplt
2185 section, which will be placed in the .got section by the
2189 /* We also need to make an entry in the .rela.plt/.rela.iplt
2191 relplt
->size
+= sizeof (Elf32_External_Rel
);
2192 relplt
->reloc_count
++;
2194 /* We need dynamic relocation for STT_GNU_IFUNC symbol only
2195 when there is a non-GOT reference in a shared object. */
2198 eh
->dyn_relocs
= NULL
;
2200 /* Finally, allocate space. */
2201 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2202 htab
->irelifunc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2204 /* For STT_GNU_IFUNC symbol, .got.plt has the real function
2205 addres and .got has the PLT entry adddress. We will load
2206 the GOT entry with the PLT entry in finish_dynamic_symbol if
2207 it is used. For branch, it uses .got.plt. For symbol value,
2208 1. Use .got.plt in a shared object if it is forced local or
2210 2. Use .got.plt in a non-shared object if pointer equality
2212 3. Use .got.plt if .got isn't used.
2213 4. Otherwise use .got so that it can be shared among different
2214 objects at run-time.
2215 We only need to relocate .got entry in shared object. */
2217 && (h
->dynindx
== -1
2218 || h
->forced_local
))
2220 && !h
->pointer_equality_needed
)
2221 || htab
->sgot
== NULL
)
2224 h
->got
.offset
= (bfd_vma
) -1;
2228 h
->got
.offset
= htab
->sgot
->size
;
2229 htab
->sgot
->size
+= 4;
2231 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2236 else if (htab
->elf
.dynamic_sections_created
2237 && h
->plt
.refcount
> 0)
2239 /* Make sure this symbol is output as a dynamic symbol.
2240 Undefined weak syms won't yet be marked as dynamic. */
2241 if (h
->dynindx
== -1
2242 && !h
->forced_local
)
2244 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2249 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2251 asection
*s
= htab
->splt
;
2253 /* If this is the first .plt entry, make room for the special
2256 s
->size
+= PLT_ENTRY_SIZE
;
2258 h
->plt
.offset
= s
->size
;
2260 /* If this symbol is not defined in a regular file, and we are
2261 not generating a shared library, then set the symbol to this
2262 location in the .plt. This is required to make function
2263 pointers compare as equal between the normal executable and
2264 the shared library. */
2268 h
->root
.u
.def
.section
= s
;
2269 h
->root
.u
.def
.value
= h
->plt
.offset
;
2272 /* Make room for this entry. */
2273 s
->size
+= PLT_ENTRY_SIZE
;
2275 /* We also need to make an entry in the .got.plt section, which
2276 will be placed in the .got section by the linker script. */
2277 htab
->sgotplt
->size
+= 4;
2279 /* We also need to make an entry in the .rel.plt section. */
2280 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2281 htab
->next_tls_desc_index
++;
2283 if (htab
->is_vxworks
&& !info
->shared
)
2285 /* VxWorks has a second set of relocations for each PLT entry
2286 in executables. They go in a separate relocation section,
2287 which is processed by the kernel loader. */
2289 /* There are two relocations for the initial PLT entry: an
2290 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2291 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2293 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
2294 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2296 /* There are two extra relocations for each subsequent PLT entry:
2297 an R_386_32 relocation for the GOT entry, and an R_386_32
2298 relocation for the PLT entry. */
2300 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2305 h
->plt
.offset
= (bfd_vma
) -1;
2311 h
->plt
.offset
= (bfd_vma
) -1;
2315 eh
->tlsdesc_got
= (bfd_vma
) -1;
2317 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2318 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2319 if (h
->got
.refcount
> 0
2322 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2323 h
->got
.offset
= (bfd_vma
) -1;
2324 else if (h
->got
.refcount
> 0)
2328 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2330 /* Make sure this symbol is output as a dynamic symbol.
2331 Undefined weak syms won't yet be marked as dynamic. */
2332 if (h
->dynindx
== -1
2333 && !h
->forced_local
)
2335 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2340 if (GOT_TLS_GDESC_P (tls_type
))
2342 eh
->tlsdesc_got
= htab
->sgotplt
->size
2343 - elf_i386_compute_jump_table_size (htab
);
2344 htab
->sgotplt
->size
+= 8;
2345 h
->got
.offset
= (bfd_vma
) -2;
2347 if (! GOT_TLS_GDESC_P (tls_type
)
2348 || GOT_TLS_GD_P (tls_type
))
2350 h
->got
.offset
= s
->size
;
2352 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2353 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2356 dyn
= htab
->elf
.dynamic_sections_created
;
2357 /* R_386_TLS_IE_32 needs one dynamic relocation,
2358 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2359 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2360 need two), R_386_TLS_GD needs one if local symbol and two if
2362 if (tls_type
== GOT_TLS_IE_BOTH
)
2363 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2364 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2365 || (tls_type
& GOT_TLS_IE
))
2366 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2367 else if (GOT_TLS_GD_P (tls_type
))
2368 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2369 else if (! GOT_TLS_GDESC_P (tls_type
)
2370 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2371 || h
->root
.type
!= bfd_link_hash_undefweak
)
2373 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2374 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2375 if (GOT_TLS_GDESC_P (tls_type
))
2376 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2379 h
->got
.offset
= (bfd_vma
) -1;
2381 if (eh
->dyn_relocs
== NULL
)
2384 /* In the shared -Bsymbolic case, discard space allocated for
2385 dynamic pc-relative relocs against symbols which turn out to be
2386 defined in regular objects. For the normal shared case, discard
2387 space for pc-relative relocs that have become local due to symbol
2388 visibility changes. */
2392 /* The only reloc that uses pc_count is R_386_PC32, which will
2393 appear on a call or on something like ".long foo - .". We
2394 want calls to protected symbols to resolve directly to the
2395 function rather than going via the plt. If people want
2396 function pointer comparisons to work as expected then they
2397 should avoid writing assembly like ".long foo - .". */
2398 if (SYMBOL_CALLS_LOCAL (info
, h
))
2400 struct elf_i386_dyn_relocs
**pp
;
2402 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2404 p
->count
-= p
->pc_count
;
2413 if (htab
->is_vxworks
)
2415 struct elf_i386_dyn_relocs
**pp
;
2416 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2418 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2425 /* Also discard relocs on undefined weak syms with non-default
2427 if (eh
->dyn_relocs
!= NULL
2428 && h
->root
.type
== bfd_link_hash_undefweak
)
2430 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2431 eh
->dyn_relocs
= NULL
;
2433 /* Make sure undefined weak symbols are output as a dynamic
2435 else if (h
->dynindx
== -1
2436 && !h
->forced_local
)
2438 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2443 else if (ELIMINATE_COPY_RELOCS
)
2445 /* For the non-shared case, discard space for relocs against
2446 symbols which turn out to need copy relocs or are not
2452 || (htab
->elf
.dynamic_sections_created
2453 && (h
->root
.type
== bfd_link_hash_undefweak
2454 || h
->root
.type
== bfd_link_hash_undefined
))))
2456 /* Make sure this symbol is output as a dynamic symbol.
2457 Undefined weak syms won't yet be marked as dynamic. */
2458 if (h
->dynindx
== -1
2459 && !h
->forced_local
)
2461 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2465 /* If that succeeded, we know we'll be keeping all the
2467 if (h
->dynindx
!= -1)
2471 eh
->dyn_relocs
= NULL
;
2476 /* Finally, allocate space. */
2477 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2481 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2483 BFD_ASSERT (sreloc
!= NULL
);
2484 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2490 /* Allocate space in .plt, .got and associated reloc sections for
2491 local dynamic relocs. */
2494 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2496 struct elf_link_hash_entry
*h
2497 = (struct elf_link_hash_entry
*) *slot
;
2499 if (h
->type
!= STT_GNU_IFUNC
2503 || h
->root
.type
!= bfd_link_hash_defined
)
2506 return elf_i386_allocate_dynrelocs (h
, inf
);
2509 /* Find any dynamic relocs that apply to read-only sections. */
2512 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2514 struct elf_i386_link_hash_entry
*eh
;
2515 struct elf_i386_dyn_relocs
*p
;
2517 if (h
->root
.type
== bfd_link_hash_warning
)
2518 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2520 eh
= (struct elf_i386_link_hash_entry
*) h
;
2521 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2523 asection
*s
= p
->sec
->output_section
;
2525 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2527 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2529 info
->flags
|= DF_TEXTREL
;
2531 /* Not an error, just cut short the traversal. */
2538 /* Set the sizes of the dynamic sections. */
2541 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2542 struct bfd_link_info
*info
)
2544 struct elf_i386_link_hash_table
*htab
;
2550 htab
= elf_i386_hash_table (info
);
2551 dynobj
= htab
->elf
.dynobj
;
2555 if (htab
->elf
.dynamic_sections_created
)
2557 /* Set the contents of the .interp section to the interpreter. */
2558 if (info
->executable
)
2560 s
= bfd_get_section_by_name (dynobj
, ".interp");
2563 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2564 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2568 /* Set up .got offsets for local syms, and space for local dynamic
2570 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2572 bfd_signed_vma
*local_got
;
2573 bfd_signed_vma
*end_local_got
;
2574 char *local_tls_type
;
2575 bfd_vma
*local_tlsdesc_gotent
;
2576 bfd_size_type locsymcount
;
2577 Elf_Internal_Shdr
*symtab_hdr
;
2580 if (! is_i386_elf (ibfd
))
2583 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2585 struct elf_i386_dyn_relocs
*p
;
2587 for (p
= ((struct elf_i386_dyn_relocs
*)
2588 elf_section_data (s
)->local_dynrel
);
2592 if (!bfd_is_abs_section (p
->sec
)
2593 && bfd_is_abs_section (p
->sec
->output_section
))
2595 /* Input section has been discarded, either because
2596 it is a copy of a linkonce section or due to
2597 linker script /DISCARD/, so we'll be discarding
2600 else if (htab
->is_vxworks
2601 && strcmp (p
->sec
->output_section
->name
,
2604 /* Relocations in vxworks .tls_vars sections are
2605 handled specially by the loader. */
2607 else if (p
->count
!= 0)
2609 srel
= elf_section_data (p
->sec
)->sreloc
;
2610 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2611 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2612 info
->flags
|= DF_TEXTREL
;
2617 local_got
= elf_local_got_refcounts (ibfd
);
2621 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2622 locsymcount
= symtab_hdr
->sh_info
;
2623 end_local_got
= local_got
+ locsymcount
;
2624 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2625 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2627 srel
= htab
->srelgot
;
2628 for (; local_got
< end_local_got
;
2629 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2631 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2634 if (GOT_TLS_GDESC_P (*local_tls_type
))
2636 *local_tlsdesc_gotent
= htab
->sgotplt
->size
2637 - elf_i386_compute_jump_table_size (htab
);
2638 htab
->sgotplt
->size
+= 8;
2639 *local_got
= (bfd_vma
) -2;
2641 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2642 || GOT_TLS_GD_P (*local_tls_type
))
2644 *local_got
= s
->size
;
2646 if (GOT_TLS_GD_P (*local_tls_type
)
2647 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2651 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2652 || (*local_tls_type
& GOT_TLS_IE
))
2654 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2655 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2656 else if (GOT_TLS_GD_P (*local_tls_type
)
2657 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2658 srel
->size
+= sizeof (Elf32_External_Rel
);
2659 if (GOT_TLS_GDESC_P (*local_tls_type
))
2660 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2664 *local_got
= (bfd_vma
) -1;
2668 if (htab
->tls_ldm_got
.refcount
> 0)
2670 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2672 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2673 htab
->sgot
->size
+= 8;
2674 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2677 htab
->tls_ldm_got
.offset
= -1;
2679 /* Allocate global sym .plt and .got entries, and space for global
2680 sym dynamic relocs. */
2681 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2683 /* Allocate .plt and .got entries, and space for local symbols. */
2684 htab_traverse (htab
->loc_hash_table
,
2685 elf_i386_allocate_local_dynrelocs
,
2688 /* For every jump slot reserved in the sgotplt, reloc_count is
2689 incremented. However, when we reserve space for TLS descriptors,
2690 it's not incremented, so in order to compute the space reserved
2691 for them, it suffices to multiply the reloc count by the jump
2694 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2696 /* We now have determined the sizes of the various dynamic sections.
2697 Allocate memory for them. */
2699 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2701 bfd_boolean strip_section
= TRUE
;
2703 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2708 || s
== htab
->sgotplt
2710 || s
== htab
->igotplt
2711 || s
== htab
->sdynbss
)
2713 /* Strip this section if we don't need it; see the
2715 /* We'd like to strip these sections if they aren't needed, but if
2716 we've exported dynamic symbols from them we must leave them.
2717 It's too late to tell BFD to get rid of the symbols. */
2719 if (htab
->elf
.hplt
!= NULL
)
2720 strip_section
= FALSE
;
2722 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2724 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
2727 /* We use the reloc_count field as a counter if we need
2728 to copy relocs into the output file. */
2733 /* It's not one of our sections, so don't allocate space. */
2739 /* If we don't need this section, strip it from the
2740 output file. This is mostly to handle .rel.bss and
2741 .rel.plt. We must create both sections in
2742 create_dynamic_sections, because they must be created
2743 before the linker maps input sections to output
2744 sections. The linker does that before
2745 adjust_dynamic_symbol is called, and it is that
2746 function which decides whether anything needs to go
2747 into these sections. */
2749 s
->flags
|= SEC_EXCLUDE
;
2753 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2756 /* Allocate memory for the section contents. We use bfd_zalloc
2757 here in case unused entries are not reclaimed before the
2758 section's contents are written out. This should not happen,
2759 but this way if it does, we get a R_386_NONE reloc instead
2761 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2762 if (s
->contents
== NULL
)
2766 if (htab
->elf
.dynamic_sections_created
)
2768 /* Add some entries to the .dynamic section. We fill in the
2769 values later, in elf_i386_finish_dynamic_sections, but we
2770 must add the entries now so that we get the correct size for
2771 the .dynamic section. The DT_DEBUG entry is filled in by the
2772 dynamic linker and used by the debugger. */
2773 #define add_dynamic_entry(TAG, VAL) \
2774 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2776 if (info
->executable
)
2778 if (!add_dynamic_entry (DT_DEBUG
, 0))
2782 if (htab
->splt
->size
!= 0)
2784 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2785 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2786 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2787 || !add_dynamic_entry (DT_JMPREL
, 0))
2793 if (!add_dynamic_entry (DT_REL
, 0)
2794 || !add_dynamic_entry (DT_RELSZ
, 0)
2795 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2798 /* If any dynamic relocs apply to a read-only section,
2799 then we need a DT_TEXTREL entry. */
2800 if ((info
->flags
& DF_TEXTREL
) == 0)
2801 elf_link_hash_traverse (&htab
->elf
,
2802 elf_i386_readonly_dynrelocs
, info
);
2804 if ((info
->flags
& DF_TEXTREL
) != 0)
2806 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2810 if (htab
->is_vxworks
2811 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2814 #undef add_dynamic_entry
2820 elf_i386_always_size_sections (bfd
*output_bfd
,
2821 struct bfd_link_info
*info
)
2823 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2827 struct elf_link_hash_entry
*tlsbase
;
2829 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2830 "_TLS_MODULE_BASE_",
2831 FALSE
, FALSE
, FALSE
);
2833 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2835 struct bfd_link_hash_entry
*bh
= NULL
;
2836 const struct elf_backend_data
*bed
2837 = get_elf_backend_data (output_bfd
);
2839 if (!(_bfd_generic_link_add_one_symbol
2840 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2841 tls_sec
, 0, NULL
, FALSE
,
2842 bed
->collect
, &bh
)))
2845 elf_i386_hash_table (info
)->tls_module_base
= bh
;
2847 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2848 tlsbase
->def_regular
= 1;
2849 tlsbase
->other
= STV_HIDDEN
;
2850 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2857 /* Set the correct type for an x86 ELF section. We do this by the
2858 section name, which is a hack, but ought to work. */
2861 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2862 Elf_Internal_Shdr
*hdr
,
2865 register const char *name
;
2867 name
= bfd_get_section_name (abfd
, sec
);
2869 /* This is an ugly, but unfortunately necessary hack that is
2870 needed when producing EFI binaries on x86. It tells
2871 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2872 containing ELF relocation info. We need this hack in order to
2873 be able to generate ELF binaries that can be translated into
2874 EFI applications (which are essentially COFF objects). Those
2875 files contain a COFF ".reloc" section inside an ELFNN object,
2876 which would normally cause BFD to segfault because it would
2877 attempt to interpret this section as containing relocation
2878 entries for section "oc". With this hack enabled, ".reloc"
2879 will be treated as a normal data section, which will avoid the
2880 segfault. However, you won't be able to create an ELFNN binary
2881 with a section named "oc" that needs relocations, but that's
2882 the kind of ugly side-effects you get when detecting section
2883 types based on their names... In practice, this limitation is
2884 unlikely to bite. */
2885 if (strcmp (name
, ".reloc") == 0)
2886 hdr
->sh_type
= SHT_PROGBITS
;
2891 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2892 executables. Rather than setting it to the beginning of the TLS
2893 section, we have to set it to the end. This function may be called
2894 multiple times, it is idempotent. */
2897 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2899 struct bfd_link_hash_entry
*base
;
2901 if (!info
->executable
)
2904 base
= elf_i386_hash_table (info
)->tls_module_base
;
2909 base
->u
.def
.value
= elf_hash_table (info
)->tls_size
;
2912 /* Return the base VMA address which should be subtracted from real addresses
2913 when resolving @dtpoff relocation.
2914 This is PT_TLS segment p_vaddr. */
2917 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2919 /* If tls_sec is NULL, we should have signalled an error already. */
2920 if (elf_hash_table (info
)->tls_sec
== NULL
)
2922 return elf_hash_table (info
)->tls_sec
->vma
;
2925 /* Return the relocation value for @tpoff relocation
2926 if STT_TLS virtual address is ADDRESS. */
2929 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2931 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2933 /* If tls_sec is NULL, we should have signalled an error already. */
2934 if (htab
->tls_sec
== NULL
)
2936 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2939 /* Relocate an i386 ELF section. */
2942 elf_i386_relocate_section (bfd
*output_bfd
,
2943 struct bfd_link_info
*info
,
2945 asection
*input_section
,
2947 Elf_Internal_Rela
*relocs
,
2948 Elf_Internal_Sym
*local_syms
,
2949 asection
**local_sections
)
2951 struct elf_i386_link_hash_table
*htab
;
2952 Elf_Internal_Shdr
*symtab_hdr
;
2953 struct elf_link_hash_entry
**sym_hashes
;
2954 bfd_vma
*local_got_offsets
;
2955 bfd_vma
*local_tlsdesc_gotents
;
2956 Elf_Internal_Rela
*rel
;
2957 Elf_Internal_Rela
*relend
;
2958 bfd_boolean is_vxworks_tls
;
2960 BFD_ASSERT (is_i386_elf (input_bfd
));
2962 htab
= elf_i386_hash_table (info
);
2963 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2964 sym_hashes
= elf_sym_hashes (input_bfd
);
2965 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2966 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2967 /* We have to handle relocations in vxworks .tls_vars sections
2968 specially, because the dynamic loader is 'weird'. */
2969 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2970 && !strcmp (input_section
->output_section
->name
,
2973 elf_i386_set_tls_module_base (info
);
2976 relend
= relocs
+ input_section
->reloc_count
;
2977 for (; rel
< relend
; rel
++)
2979 unsigned int r_type
;
2980 reloc_howto_type
*howto
;
2981 unsigned long r_symndx
;
2982 struct elf_link_hash_entry
*h
;
2983 Elf_Internal_Sym
*sym
;
2985 bfd_vma off
, offplt
;
2987 bfd_boolean unresolved_reloc
;
2988 bfd_reloc_status_type r
;
2992 r_type
= ELF32_R_TYPE (rel
->r_info
);
2993 if (r_type
== R_386_GNU_VTINHERIT
2994 || r_type
== R_386_GNU_VTENTRY
)
2997 if ((indx
= r_type
) >= R_386_standard
2998 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2999 >= R_386_ext
- R_386_standard
)
3000 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3001 >= R_386_irelative
- R_386_ext
))
3003 (*_bfd_error_handler
)
3004 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3005 input_bfd
, input_section
, r_type
);
3006 bfd_set_error (bfd_error_bad_value
);
3009 howto
= elf_howto_table
+ indx
;
3011 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3015 unresolved_reloc
= FALSE
;
3016 if (r_symndx
< symtab_hdr
->sh_info
)
3018 sym
= local_syms
+ r_symndx
;
3019 sec
= local_sections
[r_symndx
];
3020 relocation
= (sec
->output_section
->vma
3021 + sec
->output_offset
3024 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3025 && ((sec
->flags
& SEC_MERGE
) != 0
3026 || (info
->relocatable
3027 && sec
->output_offset
!= 0)))
3030 bfd_byte
*where
= contents
+ rel
->r_offset
;
3032 switch (howto
->size
)
3035 addend
= bfd_get_8 (input_bfd
, where
);
3036 if (howto
->pc_relative
)
3038 addend
= (addend
^ 0x80) - 0x80;
3043 addend
= bfd_get_16 (input_bfd
, where
);
3044 if (howto
->pc_relative
)
3046 addend
= (addend
^ 0x8000) - 0x8000;
3051 addend
= bfd_get_32 (input_bfd
, where
);
3052 if (howto
->pc_relative
)
3054 addend
= (addend
^ 0x80000000) - 0x80000000;
3062 if (info
->relocatable
)
3063 addend
+= sec
->output_offset
;
3066 asection
*msec
= sec
;
3067 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3069 addend
-= relocation
;
3070 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3073 switch (howto
->size
)
3076 /* FIXME: overflow checks. */
3077 if (howto
->pc_relative
)
3079 bfd_put_8 (input_bfd
, addend
, where
);
3082 if (howto
->pc_relative
)
3084 bfd_put_16 (input_bfd
, addend
, where
);
3087 if (howto
->pc_relative
)
3089 bfd_put_32 (input_bfd
, addend
, where
);
3093 else if (ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3095 /* Relocate against local STT_GNU_IFUNC symbol. */
3096 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
,
3101 /* Set STT_GNU_IFUNC symbol value. */
3102 h
->root
.u
.def
.value
= sym
->st_value
;
3103 h
->root
.u
.def
.section
= sec
;
3110 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3111 r_symndx
, symtab_hdr
, sym_hashes
,
3113 unresolved_reloc
, warned
);
3116 if (sec
!= NULL
&& elf_discarded_section (sec
))
3118 /* For relocs against symbols from removed linkonce sections,
3119 or sections discarded by a linker script, we just want the
3120 section contents zeroed. Avoid any special processing. */
3121 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
3127 if (info
->relocatable
)
3130 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3131 it here if it is defined in a non-shared object. */
3133 && h
->type
== STT_GNU_IFUNC
3136 asection
*plt
, *gotplt
, *base_got
;
3139 if ((input_section
->flags
& SEC_ALLOC
) == 0
3140 || h
->plt
.offset
== (bfd_vma
) -1)
3143 /* STT_GNU_IFUNC symbol must go through PLT. */
3144 if (htab
->splt
!= NULL
)
3147 gotplt
= htab
->sgotplt
;
3152 gotplt
= htab
->igotplt
;
3155 relocation
= (plt
->output_section
->vma
3156 + plt
->output_offset
+ h
->plt
.offset
);
3161 (*_bfd_error_handler
)
3162 (_("%B: relocation %s against STT_GNU_IFUNC "
3163 "symbol `%s' isn't handled by %s"), input_bfd
,
3164 elf_howto_table
[r_type
].name
,
3165 h
->root
.root
.string
, __FUNCTION__
);
3166 bfd_set_error (bfd_error_bad_value
);
3170 /* Generate dynamic relcoation only when there is a
3171 non-GOF reference in a shared object. */
3172 if (info
->shared
&& h
->non_got_ref
)
3174 Elf_Internal_Rela outrel
;
3179 /* Need a dynamic relocation to get the real function
3181 offset
= _bfd_elf_section_offset (output_bfd
,
3185 if (offset
== (bfd_vma
) -1
3186 || offset
== (bfd_vma
) -2)
3189 outrel
.r_offset
= (input_section
->output_section
->vma
3190 + input_section
->output_offset
3193 if (h
->dynindx
== -1
3196 /* This symbol is resolved locally. */
3197 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3198 bfd_put_32 (output_bfd
,
3199 (h
->root
.u
.def
.value
3200 + h
->root
.u
.def
.section
->output_section
->vma
3201 + h
->root
.u
.def
.section
->output_offset
),
3205 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3207 sreloc
= htab
->irelifunc
;
3208 loc
= sreloc
->contents
;
3209 loc
+= (sreloc
->reloc_count
++
3210 * sizeof (Elf32_External_Rel
));
3211 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3213 /* If this reloc is against an external symbol, we
3214 do not want to fiddle with the addend. Otherwise,
3215 we need to include the symbol value so that it
3216 becomes an addend for the dynamic reloc. For an
3217 internal symbol, we have updated addend. */
3226 base_got
= htab
->sgot
;
3227 off
= h
->got
.offset
;
3229 if (base_got
== NULL
)
3232 if (off
== (bfd_vma
) -1)
3234 /* We can't use h->got.offset here to save state, or
3235 even just remember the offset, as finish_dynamic_symbol
3236 would use that as offset into .got. */
3238 if (htab
->splt
!= NULL
)
3240 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3241 off
= (plt_index
+ 3) * 4;
3242 base_got
= htab
->sgotplt
;
3246 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3247 off
= plt_index
* 4;
3248 base_got
= htab
->igotplt
;
3251 if (h
->dynindx
== -1
3255 /* This references the local defitionion. We must
3256 initialize this entry in the global offset table.
3257 Since the offset must always be a multiple of 8,
3258 we use the least significant bit to record
3259 whether we have initialized it already.
3261 When doing a dynamic link, we create a .rela.got
3262 relocation entry to initialize the value. This
3263 is done in the finish_dynamic_symbol routine. */
3268 bfd_put_32 (output_bfd
, relocation
,
3269 base_got
->contents
+ off
);
3276 /* Adjust for static executables. */
3277 if (htab
->splt
== NULL
)
3278 relocation
+= gotplt
->output_offset
;
3282 relocation
= (base_got
->output_section
->vma
3283 + base_got
->output_offset
+ off
3284 - gotplt
->output_section
->vma
3285 - gotplt
->output_offset
);
3286 /* Adjust for static executables. */
3287 if (htab
->splt
== NULL
)
3288 relocation
+= gotplt
->output_offset
;
3294 relocation
-= (gotplt
->output_section
->vma
3295 + gotplt
->output_offset
);
3303 /* Relocation is to the entry for this symbol in the global
3305 if (htab
->sgot
== NULL
)
3312 off
= h
->got
.offset
;
3313 dyn
= htab
->elf
.dynamic_sections_created
;
3314 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3316 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3317 || (ELF_ST_VISIBILITY (h
->other
)
3318 && h
->root
.type
== bfd_link_hash_undefweak
))
3320 /* This is actually a static link, or it is a
3321 -Bsymbolic link and the symbol is defined
3322 locally, or the symbol was forced to be local
3323 because of a version file. We must initialize
3324 this entry in the global offset table. Since the
3325 offset must always be a multiple of 4, we use the
3326 least significant bit to record whether we have
3327 initialized it already.
3329 When doing a dynamic link, we create a .rel.got
3330 relocation entry to initialize the value. This
3331 is done in the finish_dynamic_symbol routine. */
3336 bfd_put_32 (output_bfd
, relocation
,
3337 htab
->sgot
->contents
+ off
);
3342 unresolved_reloc
= FALSE
;
3346 if (local_got_offsets
== NULL
)
3349 off
= local_got_offsets
[r_symndx
];
3351 /* The offset must always be a multiple of 4. We use
3352 the least significant bit to record whether we have
3353 already generated the necessary reloc. */
3358 bfd_put_32 (output_bfd
, relocation
,
3359 htab
->sgot
->contents
+ off
);
3364 Elf_Internal_Rela outrel
;
3371 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3372 + htab
->sgot
->output_offset
3374 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3376 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3377 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3380 local_got_offsets
[r_symndx
] |= 1;
3384 if (off
>= (bfd_vma
) -2)
3387 relocation
= htab
->sgot
->output_section
->vma
3388 + htab
->sgot
->output_offset
+ off
3389 - htab
->sgotplt
->output_section
->vma
3390 - htab
->sgotplt
->output_offset
;
3394 /* Relocation is relative to the start of the global offset
3397 /* Check to make sure it isn't a protected function symbol
3398 for shared library since it may not be local when used
3399 as function address. We also need to make sure that a
3400 symbol is defined locally. */
3401 if (info
->shared
&& h
)
3403 if (!h
->def_regular
)
3407 switch (ELF_ST_VISIBILITY (h
->other
))
3410 v
= _("hidden symbol");
3413 v
= _("internal symbol");
3416 v
= _("protected symbol");
3423 (*_bfd_error_handler
)
3424 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3425 input_bfd
, v
, h
->root
.root
.string
);
3426 bfd_set_error (bfd_error_bad_value
);
3429 else if (!info
->executable
3430 && h
->type
== STT_FUNC
3431 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3433 (*_bfd_error_handler
)
3434 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3435 input_bfd
, h
->root
.root
.string
);
3436 bfd_set_error (bfd_error_bad_value
);
3441 /* Note that sgot is not involved in this
3442 calculation. We always want the start of .got.plt. If we
3443 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3444 permitted by the ABI, we might have to change this
3446 relocation
-= htab
->sgotplt
->output_section
->vma
3447 + htab
->sgotplt
->output_offset
;
3451 /* Use global offset table as symbol value. */
3452 relocation
= htab
->sgotplt
->output_section
->vma
3453 + htab
->sgotplt
->output_offset
;
3454 unresolved_reloc
= FALSE
;
3458 /* Relocation is to the entry for this symbol in the
3459 procedure linkage table. */
3461 /* Resolve a PLT32 reloc against a local symbol directly,
3462 without using the procedure linkage table. */
3466 if (h
->plt
.offset
== (bfd_vma
) -1
3467 || htab
->splt
== NULL
)
3469 /* We didn't make a PLT entry for this symbol. This
3470 happens when statically linking PIC code, or when
3471 using -Bsymbolic. */
3475 relocation
= (htab
->splt
->output_section
->vma
3476 + htab
->splt
->output_offset
3478 unresolved_reloc
= FALSE
;
3483 if ((input_section
->flags
& SEC_ALLOC
) == 0
3489 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3490 || h
->root
.type
!= bfd_link_hash_undefweak
)
3491 && (r_type
!= R_386_PC32
3492 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3493 || (ELIMINATE_COPY_RELOCS
3500 || h
->root
.type
== bfd_link_hash_undefweak
3501 || h
->root
.type
== bfd_link_hash_undefined
)))
3503 Elf_Internal_Rela outrel
;
3505 bfd_boolean skip
, relocate
;
3508 /* When generating a shared object, these relocations
3509 are copied into the output file to be resolved at run
3516 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3518 if (outrel
.r_offset
== (bfd_vma
) -1)
3520 else if (outrel
.r_offset
== (bfd_vma
) -2)
3521 skip
= TRUE
, relocate
= TRUE
;
3522 outrel
.r_offset
+= (input_section
->output_section
->vma
3523 + input_section
->output_offset
);
3526 memset (&outrel
, 0, sizeof outrel
);
3529 && (r_type
== R_386_PC32
3531 || !SYMBOLIC_BIND (info
, h
)
3532 || !h
->def_regular
))
3533 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3536 /* This symbol is local, or marked to become local. */
3538 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3541 sreloc
= elf_section_data (input_section
)->sreloc
;
3543 BFD_ASSERT (sreloc
!= NULL
&& sreloc
->contents
!= NULL
);
3545 loc
= sreloc
->contents
;
3546 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3548 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3550 /* If this reloc is against an external symbol, we do
3551 not want to fiddle with the addend. Otherwise, we
3552 need to include the symbol value so that it becomes
3553 an addend for the dynamic reloc. */
3562 Elf_Internal_Rela outrel
;
3566 outrel
.r_offset
= rel
->r_offset
3567 + input_section
->output_section
->vma
3568 + input_section
->output_offset
;
3569 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3570 sreloc
= elf_section_data (input_section
)->sreloc
;
3573 loc
= sreloc
->contents
;
3574 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3575 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3580 case R_386_TLS_GOTDESC
:
3581 case R_386_TLS_DESC_CALL
:
3582 case R_386_TLS_IE_32
:
3583 case R_386_TLS_GOTIE
:
3584 tls_type
= GOT_UNKNOWN
;
3585 if (h
== NULL
&& local_got_offsets
)
3586 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3588 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3589 if (tls_type
== GOT_TLS_IE
)
3590 tls_type
= GOT_TLS_IE_NEG
;
3592 if (! elf_i386_tls_transition (info
, input_bfd
,
3593 input_section
, contents
,
3594 symtab_hdr
, sym_hashes
,
3595 &r_type
, tls_type
, rel
,
3599 if (r_type
== R_386_TLS_LE_32
)
3601 BFD_ASSERT (! unresolved_reloc
);
3602 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3607 /* GD->LE transition. */
3608 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3611 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3613 movl %gs:0, %eax; subl $foo@tpoff, %eax
3614 (6 byte form of subl). */
3615 memcpy (contents
+ rel
->r_offset
- 3,
3616 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3617 roff
= rel
->r_offset
+ 5;
3621 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3623 movl %gs:0, %eax; subl $foo@tpoff, %eax
3624 (6 byte form of subl). */
3625 memcpy (contents
+ rel
->r_offset
- 2,
3626 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3627 roff
= rel
->r_offset
+ 6;
3629 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3631 /* Skip R_386_PC32/R_386_PLT32. */
3635 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3637 /* GDesc -> LE transition.
3638 It's originally something like:
3639 leal x@tlsdesc(%ebx), %eax
3643 Registers other than %eax may be set up here. */
3648 roff
= rel
->r_offset
;
3649 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3651 /* Now modify the instruction as appropriate. */
3652 /* aoliva FIXME: remove the above and xor the byte
3654 bfd_put_8 (output_bfd
, val
^ 0x86,
3655 contents
+ roff
- 1);
3656 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3660 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3662 /* GDesc -> LE transition.
3670 roff
= rel
->r_offset
;
3671 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3672 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3675 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3679 /* IE->LE transition:
3680 Originally it can be one of:
3688 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3691 /* movl foo, %eax. */
3692 bfd_put_8 (output_bfd
, 0xb8,
3693 contents
+ rel
->r_offset
- 1);
3699 type
= bfd_get_8 (input_bfd
,
3700 contents
+ rel
->r_offset
- 2);
3705 bfd_put_8 (output_bfd
, 0xc7,
3706 contents
+ rel
->r_offset
- 2);
3707 bfd_put_8 (output_bfd
,
3708 0xc0 | ((val
>> 3) & 7),
3709 contents
+ rel
->r_offset
- 1);
3713 bfd_put_8 (output_bfd
, 0x81,
3714 contents
+ rel
->r_offset
- 2);
3715 bfd_put_8 (output_bfd
,
3716 0xc0 | ((val
>> 3) & 7),
3717 contents
+ rel
->r_offset
- 1);
3724 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3725 contents
+ rel
->r_offset
);
3730 unsigned int val
, type
;
3732 /* {IE_32,GOTIE}->LE transition:
3733 Originally it can be one of:
3734 subl foo(%reg1), %reg2
3735 movl foo(%reg1), %reg2
3736 addl foo(%reg1), %reg2
3739 movl $foo, %reg2 (6 byte form)
3740 addl $foo, %reg2. */
3741 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3742 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3746 bfd_put_8 (output_bfd
, 0xc7,
3747 contents
+ rel
->r_offset
- 2);
3748 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3749 contents
+ rel
->r_offset
- 1);
3751 else if (type
== 0x2b)
3754 bfd_put_8 (output_bfd
, 0x81,
3755 contents
+ rel
->r_offset
- 2);
3756 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3757 contents
+ rel
->r_offset
- 1);
3759 else if (type
== 0x03)
3762 bfd_put_8 (output_bfd
, 0x81,
3763 contents
+ rel
->r_offset
- 2);
3764 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3765 contents
+ rel
->r_offset
- 1);
3769 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3770 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3771 contents
+ rel
->r_offset
);
3773 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3774 contents
+ rel
->r_offset
);
3779 if (htab
->sgot
== NULL
)
3784 off
= h
->got
.offset
;
3785 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3789 if (local_got_offsets
== NULL
)
3792 off
= local_got_offsets
[r_symndx
];
3793 offplt
= local_tlsdesc_gotents
[r_symndx
];
3800 Elf_Internal_Rela outrel
;
3805 if (htab
->srelgot
== NULL
)
3808 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3810 if (GOT_TLS_GDESC_P (tls_type
))
3812 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3813 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3814 <= htab
->sgotplt
->size
);
3815 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3816 + htab
->sgotplt
->output_offset
3818 + htab
->sgotplt_jump_table_size
);
3819 sreloc
= htab
->srelplt
;
3820 loc
= sreloc
->contents
;
3821 loc
+= (htab
->next_tls_desc_index
++
3822 * sizeof (Elf32_External_Rel
));
3823 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3824 <= sreloc
->contents
+ sreloc
->size
);
3825 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3828 BFD_ASSERT (! unresolved_reloc
);
3829 bfd_put_32 (output_bfd
,
3830 relocation
- elf_i386_dtpoff_base (info
),
3831 htab
->sgotplt
->contents
+ offplt
3832 + htab
->sgotplt_jump_table_size
+ 4);
3836 bfd_put_32 (output_bfd
, 0,
3837 htab
->sgotplt
->contents
+ offplt
3838 + htab
->sgotplt_jump_table_size
+ 4);
3842 sreloc
= htab
->srelgot
;
3844 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3845 + htab
->sgot
->output_offset
+ off
);
3847 if (GOT_TLS_GD_P (tls_type
))
3848 dr_type
= R_386_TLS_DTPMOD32
;
3849 else if (GOT_TLS_GDESC_P (tls_type
))
3851 else if (tls_type
== GOT_TLS_IE_POS
)
3852 dr_type
= R_386_TLS_TPOFF
;
3854 dr_type
= R_386_TLS_TPOFF32
;
3856 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3857 bfd_put_32 (output_bfd
,
3858 relocation
- elf_i386_dtpoff_base (info
),
3859 htab
->sgot
->contents
+ off
);
3860 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3861 bfd_put_32 (output_bfd
,
3862 elf_i386_dtpoff_base (info
) - relocation
,
3863 htab
->sgot
->contents
+ off
);
3864 else if (dr_type
!= R_386_TLS_DESC
)
3865 bfd_put_32 (output_bfd
, 0,
3866 htab
->sgot
->contents
+ off
);
3867 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3869 loc
= sreloc
->contents
;
3870 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3871 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3872 <= sreloc
->contents
+ sreloc
->size
);
3873 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3875 if (GOT_TLS_GD_P (tls_type
))
3879 BFD_ASSERT (! unresolved_reloc
);
3880 bfd_put_32 (output_bfd
,
3881 relocation
- elf_i386_dtpoff_base (info
),
3882 htab
->sgot
->contents
+ off
+ 4);
3886 bfd_put_32 (output_bfd
, 0,
3887 htab
->sgot
->contents
+ off
+ 4);
3888 outrel
.r_info
= ELF32_R_INFO (indx
,
3889 R_386_TLS_DTPOFF32
);
3890 outrel
.r_offset
+= 4;
3891 sreloc
->reloc_count
++;
3892 loc
+= sizeof (Elf32_External_Rel
);
3893 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3894 <= sreloc
->contents
+ sreloc
->size
);
3895 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3898 else if (tls_type
== GOT_TLS_IE_BOTH
)
3900 bfd_put_32 (output_bfd
,
3902 ? relocation
- elf_i386_dtpoff_base (info
)
3904 htab
->sgot
->contents
+ off
+ 4);
3905 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3906 outrel
.r_offset
+= 4;
3907 sreloc
->reloc_count
++;
3908 loc
+= sizeof (Elf32_External_Rel
);
3909 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3916 local_got_offsets
[r_symndx
] |= 1;
3919 if (off
>= (bfd_vma
) -2
3920 && ! GOT_TLS_GDESC_P (tls_type
))
3922 if (r_type
== R_386_TLS_GOTDESC
3923 || r_type
== R_386_TLS_DESC_CALL
)
3925 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3926 unresolved_reloc
= FALSE
;
3928 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3930 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
3931 + htab
->sgotplt
->output_offset
;
3932 relocation
= htab
->sgot
->output_section
->vma
3933 + htab
->sgot
->output_offset
+ off
- g_o_t
;
3934 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3935 && tls_type
== GOT_TLS_IE_BOTH
)
3937 if (r_type
== R_386_TLS_IE
)
3938 relocation
+= g_o_t
;
3939 unresolved_reloc
= FALSE
;
3941 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3943 unsigned int val
, type
;
3946 /* GD->IE transition. */
3947 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3948 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3951 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3953 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3955 roff
= rel
->r_offset
- 3;
3959 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3961 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3962 roff
= rel
->r_offset
- 2;
3964 memcpy (contents
+ roff
,
3965 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3966 contents
[roff
+ 7] = 0x80 | (val
& 7);
3967 /* If foo is used only with foo@gotntpoff(%reg) and
3968 foo@indntpoff, but not with foo@gottpoff(%reg), change
3969 subl $foo@gottpoff(%reg), %eax
3971 addl $foo@gotntpoff(%reg), %eax. */
3972 if (tls_type
== GOT_TLS_IE_POS
)
3973 contents
[roff
+ 6] = 0x03;
3974 bfd_put_32 (output_bfd
,
3975 htab
->sgot
->output_section
->vma
3976 + htab
->sgot
->output_offset
+ off
3977 - htab
->sgotplt
->output_section
->vma
3978 - htab
->sgotplt
->output_offset
,
3979 contents
+ roff
+ 8);
3980 /* Skip R_386_PLT32. */
3984 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3986 /* GDesc -> IE transition.
3987 It's originally something like:
3988 leal x@tlsdesc(%ebx), %eax
3991 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3993 movl x@gottpoff(%ebx), %eax # before negl %eax
3995 Registers other than %eax may be set up here. */
3999 /* First, make sure it's a leal adding ebx to a 32-bit
4000 offset into any register, although it's probably
4001 almost always going to be eax. */
4002 roff
= rel
->r_offset
;
4004 /* Now modify the instruction as appropriate. */
4005 /* To turn a leal into a movl in the form we use it, it
4006 suffices to change the first byte from 0x8d to 0x8b.
4007 aoliva FIXME: should we decide to keep the leal, all
4008 we have to do is remove the statement below, and
4009 adjust the relaxation of R_386_TLS_DESC_CALL. */
4010 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4012 if (tls_type
== GOT_TLS_IE_BOTH
)
4015 bfd_put_32 (output_bfd
,
4016 htab
->sgot
->output_section
->vma
4017 + htab
->sgot
->output_offset
+ off
4018 - htab
->sgotplt
->output_section
->vma
4019 - htab
->sgotplt
->output_offset
,
4023 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4025 /* GDesc -> IE transition.
4033 depending on how we transformed the TLS_GOTDESC above.
4038 roff
= rel
->r_offset
;
4040 /* Now modify the instruction as appropriate. */
4041 if (tls_type
!= GOT_TLS_IE_NEG
)
4044 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4045 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4050 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4051 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4061 if (! elf_i386_tls_transition (info
, input_bfd
,
4062 input_section
, contents
,
4063 symtab_hdr
, sym_hashes
,
4064 &r_type
, GOT_UNKNOWN
, rel
,
4068 if (r_type
!= R_386_TLS_LDM
)
4070 /* LD->LE transition:
4071 leal foo(%reg), %eax; call ___tls_get_addr.
4073 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4074 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4075 memcpy (contents
+ rel
->r_offset
- 2,
4076 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4077 /* Skip R_386_PC32/R_386_PLT32. */
4082 if (htab
->sgot
== NULL
)
4085 off
= htab
->tls_ldm_got
.offset
;
4090 Elf_Internal_Rela outrel
;
4093 if (htab
->srelgot
== NULL
)
4096 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
4097 + htab
->sgot
->output_offset
+ off
);
4099 bfd_put_32 (output_bfd
, 0,
4100 htab
->sgot
->contents
+ off
);
4101 bfd_put_32 (output_bfd
, 0,
4102 htab
->sgot
->contents
+ off
+ 4);
4103 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4104 loc
= htab
->srelgot
->contents
;
4105 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4106 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4107 htab
->tls_ldm_got
.offset
|= 1;
4109 relocation
= htab
->sgot
->output_section
->vma
4110 + htab
->sgot
->output_offset
+ off
4111 - htab
->sgotplt
->output_section
->vma
4112 - htab
->sgotplt
->output_offset
;
4113 unresolved_reloc
= FALSE
;
4116 case R_386_TLS_LDO_32
:
4117 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
4118 relocation
-= elf_i386_dtpoff_base (info
);
4120 /* When converting LDO to LE, we must negate. */
4121 relocation
= -elf_i386_tpoff (info
, relocation
);
4124 case R_386_TLS_LE_32
:
4128 Elf_Internal_Rela outrel
;
4133 outrel
.r_offset
= rel
->r_offset
4134 + input_section
->output_section
->vma
4135 + input_section
->output_offset
;
4136 if (h
!= NULL
&& h
->dynindx
!= -1)
4140 if (r_type
== R_386_TLS_LE_32
)
4141 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4143 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4144 sreloc
= elf_section_data (input_section
)->sreloc
;
4147 loc
= sreloc
->contents
;
4148 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4149 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4152 else if (r_type
== R_386_TLS_LE_32
)
4153 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4155 relocation
-= elf_i386_dtpoff_base (info
);
4157 else if (r_type
== R_386_TLS_LE_32
)
4158 relocation
= elf_i386_tpoff (info
, relocation
);
4160 relocation
= -elf_i386_tpoff (info
, relocation
);
4167 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4168 because such sections are not SEC_ALLOC and thus ld.so will
4169 not process them. */
4170 if (unresolved_reloc
4171 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4174 (*_bfd_error_handler
)
4175 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4178 (long) rel
->r_offset
,
4180 h
->root
.root
.string
);
4185 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4186 contents
, rel
->r_offset
,
4189 if (r
!= bfd_reloc_ok
)
4194 name
= h
->root
.root
.string
;
4197 name
= bfd_elf_string_from_elf_section (input_bfd
,
4198 symtab_hdr
->sh_link
,
4203 name
= bfd_section_name (input_bfd
, sec
);
4206 if (r
== bfd_reloc_overflow
)
4208 if (! ((*info
->callbacks
->reloc_overflow
)
4209 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4210 (bfd_vma
) 0, input_bfd
, input_section
,
4216 (*_bfd_error_handler
)
4217 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4218 input_bfd
, input_section
,
4219 (long) rel
->r_offset
, name
, (int) r
);
4228 /* Finish up dynamic symbol handling. We set the contents of various
4229 dynamic sections here. */
4232 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4233 struct bfd_link_info
*info
,
4234 struct elf_link_hash_entry
*h
,
4235 Elf_Internal_Sym
*sym
)
4237 struct elf_i386_link_hash_table
*htab
;
4239 htab
= elf_i386_hash_table (info
);
4241 if (h
->plt
.offset
!= (bfd_vma
) -1)
4245 Elf_Internal_Rela rel
;
4247 asection
*plt
, *gotplt
, *relplt
;
4249 /* When building a static executable, use .iplt, .igot.plt and
4250 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4251 if (htab
->splt
!= NULL
)
4254 gotplt
= htab
->sgotplt
;
4255 relplt
= htab
->srelplt
;
4260 gotplt
= htab
->igotplt
;
4261 relplt
= htab
->irelplt
;
4264 /* This symbol has an entry in the procedure linkage table. Set
4267 if ((h
->dynindx
== -1
4268 && !((h
->forced_local
|| info
->executable
)
4270 && h
->type
== STT_GNU_IFUNC
))
4276 /* Get the index in the procedure linkage table which
4277 corresponds to this symbol. This is the index of this symbol
4278 in all the symbols for which we are making plt entries. The
4279 first entry in the procedure linkage table is reserved.
4281 Get the offset into the .got table of the entry that
4282 corresponds to this function. Each .got entry is 4 bytes.
4283 The first three are reserved.
4285 For static executables, we don't reserve anything. */
4287 if (plt
== htab
->splt
)
4289 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
4290 got_offset
= (plt_index
+ 3) * 4;
4294 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4295 got_offset
= plt_index
* 4;
4298 /* Fill in the entry in the procedure linkage table. */
4301 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4303 bfd_put_32 (output_bfd
,
4304 (gotplt
->output_section
->vma
4305 + gotplt
->output_offset
4307 plt
->contents
+ h
->plt
.offset
+ 2);
4309 if (htab
->is_vxworks
)
4311 int s
, k
, reloc_index
;
4313 /* Create the R_386_32 relocation referencing the GOT
4314 for this PLT entry. */
4316 /* S: Current slot number (zero-based). */
4317 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4318 /* K: Number of relocations for PLTResolve. */
4320 k
= PLTRESOLVE_RELOCS_SHLIB
;
4322 k
= PLTRESOLVE_RELOCS
;
4323 /* Skip the PLTresolve relocations, and the relocations for
4324 the other PLT slots. */
4325 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4326 loc
= (htab
->srelplt2
->contents
+ reloc_index
4327 * sizeof (Elf32_External_Rel
));
4329 rel
.r_offset
= (htab
->splt
->output_section
->vma
4330 + htab
->splt
->output_offset
4331 + h
->plt
.offset
+ 2),
4332 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4333 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4335 /* Create the R_386_32 relocation referencing the beginning of
4336 the PLT for this GOT entry. */
4337 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
4338 + htab
->sgotplt
->output_offset
4340 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4341 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4342 loc
+ sizeof (Elf32_External_Rel
));
4347 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4349 bfd_put_32 (output_bfd
, got_offset
,
4350 plt
->contents
+ h
->plt
.offset
+ 2);
4353 /* Don't fill PLT entry for static executables. */
4354 if (plt
== htab
->splt
)
4356 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4357 plt
->contents
+ h
->plt
.offset
+ 7);
4358 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4359 plt
->contents
+ h
->plt
.offset
+ 12);
4362 /* Fill in the entry in the global offset table. */
4363 bfd_put_32 (output_bfd
,
4364 (plt
->output_section
->vma
4365 + plt
->output_offset
4368 gotplt
->contents
+ got_offset
);
4370 /* Fill in the entry in the .rel.plt section. */
4371 rel
.r_offset
= (gotplt
->output_section
->vma
4372 + gotplt
->output_offset
4374 if (h
->dynindx
== -1
4375 || ((info
->executable
4376 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4378 && h
->type
== STT_GNU_IFUNC
))
4380 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4381 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4382 in the .got.plt section. */
4383 bfd_put_32 (output_bfd
,
4384 (h
->root
.u
.def
.value
4385 + h
->root
.u
.def
.section
->output_section
->vma
4386 + h
->root
.u
.def
.section
->output_offset
),
4387 gotplt
->contents
+ got_offset
);
4388 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4391 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4392 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4393 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4395 if (!h
->def_regular
)
4397 /* Mark the symbol as undefined, rather than as defined in
4398 the .plt section. Leave the value if there were any
4399 relocations where pointer equality matters (this is a clue
4400 for the dynamic linker, to make function pointer
4401 comparisons work between an application and shared
4402 library), otherwise set it to zero. If a function is only
4403 called from a binary, there is no need to slow down
4404 shared libraries because of that. */
4405 sym
->st_shndx
= SHN_UNDEF
;
4406 if (!h
->pointer_equality_needed
)
4411 if (h
->got
.offset
!= (bfd_vma
) -1
4412 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4413 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4415 Elf_Internal_Rela rel
;
4418 /* This symbol has an entry in the global offset table. Set it
4421 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
4424 rel
.r_offset
= (htab
->sgot
->output_section
->vma
4425 + htab
->sgot
->output_offset
4426 + (h
->got
.offset
& ~(bfd_vma
) 1));
4428 /* If this is a static link, or it is a -Bsymbolic link and the
4429 symbol is defined locally or was forced to be local because
4430 of a version file, we just want to emit a RELATIVE reloc.
4431 The entry in the global offset table will already have been
4432 initialized in the relocate_section function. */
4434 && h
->type
== STT_GNU_IFUNC
)
4438 /* Generate R_386_GLOB_DAT. */
4443 if (!h
->pointer_equality_needed
)
4446 /* For non-shared object, we can't use .got.plt, which
4447 contains the real function addres if we need pointer
4448 equality. We load the GOT entry with the PLT entry. */
4449 asection
*plt
= htab
->splt
? htab
->splt
: htab
->iplt
;
4450 bfd_put_32 (output_bfd
,
4451 (plt
->output_section
->vma
4452 + plt
->output_offset
+ h
->plt
.offset
),
4453 htab
->sgot
->contents
+ h
->got
.offset
);
4457 else if (info
->shared
4458 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4460 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4461 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4465 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4467 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4468 htab
->sgot
->contents
+ h
->got
.offset
);
4469 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4472 loc
= htab
->srelgot
->contents
;
4473 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4474 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4479 Elf_Internal_Rela rel
;
4482 /* This symbol needs a copy reloc. Set it up. */
4484 if (h
->dynindx
== -1
4485 || (h
->root
.type
!= bfd_link_hash_defined
4486 && h
->root
.type
!= bfd_link_hash_defweak
)
4487 || htab
->srelbss
== NULL
)
4490 rel
.r_offset
= (h
->root
.u
.def
.value
4491 + h
->root
.u
.def
.section
->output_section
->vma
4492 + h
->root
.u
.def
.section
->output_offset
);
4493 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4494 loc
= htab
->srelbss
->contents
;
4495 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4496 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4499 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4500 be NULL for local symbols.
4502 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4503 is relative to the ".got" section. */
4505 && (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4506 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
)))
4507 sym
->st_shndx
= SHN_ABS
;
4512 /* Finish up local dynamic symbol handling. We set the contents of
4513 various dynamic sections here. */
4516 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4518 struct elf_link_hash_entry
*h
4519 = (struct elf_link_hash_entry
*) *slot
;
4520 struct bfd_link_info
*info
4521 = (struct bfd_link_info
*) inf
;
4523 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4527 /* Used to decide how to sort relocs in an optimal manner for the
4528 dynamic linker, before writing them out. */
4530 static enum elf_reloc_type_class
4531 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4533 switch (ELF32_R_TYPE (rela
->r_info
))
4535 case R_386_RELATIVE
:
4536 return reloc_class_relative
;
4537 case R_386_JUMP_SLOT
:
4538 return reloc_class_plt
;
4540 return reloc_class_copy
;
4542 return reloc_class_normal
;
4546 /* Finish up the dynamic sections. */
4549 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4550 struct bfd_link_info
*info
)
4552 struct elf_i386_link_hash_table
*htab
;
4556 htab
= elf_i386_hash_table (info
);
4557 dynobj
= htab
->elf
.dynobj
;
4558 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4560 if (htab
->elf
.dynamic_sections_created
)
4562 Elf32_External_Dyn
*dyncon
, *dynconend
;
4564 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
4567 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4568 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4569 for (; dyncon
< dynconend
; dyncon
++)
4571 Elf_Internal_Dyn dyn
;
4574 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4579 if (htab
->is_vxworks
4580 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4586 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4591 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4596 dyn
.d_un
.d_val
= s
->size
;
4600 /* My reading of the SVR4 ABI indicates that the
4601 procedure linkage table relocs (DT_JMPREL) should be
4602 included in the overall relocs (DT_REL). This is
4603 what Solaris does. However, UnixWare can not handle
4604 that case. Therefore, we override the DT_RELSZ entry
4605 here to make it not include the JMPREL relocs. */
4609 dyn
.d_un
.d_val
-= s
->size
;
4613 /* We may not be using the standard ELF linker script.
4614 If .rel.plt is the first .rel section, we adjust
4615 DT_REL to not include it. */
4619 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4621 dyn
.d_un
.d_ptr
+= s
->size
;
4625 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4628 /* Fill in the first entry in the procedure linkage table. */
4629 if (htab
->splt
&& htab
->splt
->size
> 0)
4633 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
4634 sizeof (elf_i386_pic_plt0_entry
));
4635 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4636 htab
->plt0_pad_byte
,
4637 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4641 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
4642 sizeof(elf_i386_plt0_entry
));
4643 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4644 htab
->plt0_pad_byte
,
4645 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4646 bfd_put_32 (output_bfd
,
4647 (htab
->sgotplt
->output_section
->vma
4648 + htab
->sgotplt
->output_offset
4650 htab
->splt
->contents
+ 2);
4651 bfd_put_32 (output_bfd
,
4652 (htab
->sgotplt
->output_section
->vma
4653 + htab
->sgotplt
->output_offset
4655 htab
->splt
->contents
+ 8);
4657 if (htab
->is_vxworks
)
4659 Elf_Internal_Rela rel
;
4661 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4662 On IA32 we use REL relocations so the addend goes in
4663 the PLT directly. */
4664 rel
.r_offset
= (htab
->splt
->output_section
->vma
4665 + htab
->splt
->output_offset
4667 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4668 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4669 htab
->srelplt2
->contents
);
4670 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4671 rel
.r_offset
= (htab
->splt
->output_section
->vma
4672 + htab
->splt
->output_offset
4674 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4675 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4676 htab
->srelplt2
->contents
+
4677 sizeof (Elf32_External_Rel
));
4681 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4682 really seem like the right value. */
4683 elf_section_data (htab
->splt
->output_section
)
4684 ->this_hdr
.sh_entsize
= 4;
4686 /* Correct the .rel.plt.unloaded relocations. */
4687 if (htab
->is_vxworks
&& !info
->shared
)
4689 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4692 p
= htab
->srelplt2
->contents
;
4694 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4696 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4698 for (; num_plts
; num_plts
--)
4700 Elf_Internal_Rela rel
;
4701 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4702 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4703 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4704 p
+= sizeof (Elf32_External_Rel
);
4706 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4707 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4708 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4709 p
+= sizeof (Elf32_External_Rel
);
4717 /* Fill in the first three entries in the global offset table. */
4718 if (htab
->sgotplt
->size
> 0)
4720 bfd_put_32 (output_bfd
,
4722 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4723 htab
->sgotplt
->contents
);
4724 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
4725 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
4728 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4731 if (htab
->sgot
&& htab
->sgot
->size
> 0)
4732 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4734 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4735 htab_traverse (htab
->loc_hash_table
,
4736 elf_i386_finish_local_dynamic_symbol
,
4742 /* Return address for Ith PLT stub in section PLT, for relocation REL
4743 or (bfd_vma) -1 if it should not be included. */
4746 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4747 const arelent
*rel ATTRIBUTE_UNUSED
)
4749 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4752 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4755 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4757 if (h
->plt
.offset
!= (bfd_vma
) -1
4759 && !h
->pointer_equality_needed
)
4762 return _bfd_elf_hash_symbol (h
);
4765 /* Hook called by the linker routine which adds symbols from an object
4769 elf_i386_add_symbol_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
4770 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4771 Elf_Internal_Sym
* sym
,
4772 const char ** namep ATTRIBUTE_UNUSED
,
4773 flagword
* flagsp ATTRIBUTE_UNUSED
,
4774 asection
** secp ATTRIBUTE_UNUSED
,
4775 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4777 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4778 elf_tdata (info
->output_bfd
)->has_ifunc_symbols
= TRUE
;
4783 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4784 #define TARGET_LITTLE_NAME "elf32-i386"
4785 #define ELF_ARCH bfd_arch_i386
4786 #define ELF_MACHINE_CODE EM_386
4787 #define ELF_MAXPAGESIZE 0x1000
4789 #define elf_backend_can_gc_sections 1
4790 #define elf_backend_can_refcount 1
4791 #define elf_backend_want_got_plt 1
4792 #define elf_backend_plt_readonly 1
4793 #define elf_backend_want_plt_sym 0
4794 #define elf_backend_got_header_size 12
4796 /* Support RELA for objdump of prelink objects. */
4797 #define elf_info_to_howto elf_i386_info_to_howto_rel
4798 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4800 #define bfd_elf32_mkobject elf_i386_mkobject
4802 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4803 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4804 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4805 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4806 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4808 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4809 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4810 #define elf_backend_check_relocs elf_i386_check_relocs
4811 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4812 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4813 #define elf_backend_fake_sections elf_i386_fake_sections
4814 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4815 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4816 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4817 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4818 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4819 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4820 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4821 #define elf_backend_relocate_section elf_i386_relocate_section
4822 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4823 #define elf_backend_always_size_sections elf_i386_always_size_sections
4824 #define elf_backend_omit_section_dynsym \
4825 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4826 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4827 #define elf_backend_hash_symbol elf_i386_hash_symbol
4828 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4829 #undef elf_backend_post_process_headers
4830 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4832 #include "elf32-target.h"
4834 /* FreeBSD support. */
4836 #undef TARGET_LITTLE_SYM
4837 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4838 #undef TARGET_LITTLE_NAME
4839 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4841 #define ELF_OSABI ELFOSABI_FREEBSD
4843 /* The kernel recognizes executables as valid only if they carry a
4844 "FreeBSD" label in the ELF header. So we put this label on all
4845 executables and (for simplicity) also all other object files. */
4848 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4850 _bfd_elf_set_osabi (abfd
, info
);
4852 #ifdef OLD_FREEBSD_ABI_LABEL
4853 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4854 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4858 #undef elf_backend_post_process_headers
4859 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4861 #define elf32_bed elf32_i386_fbsd_bed
4863 #undef elf_backend_add_symbol_hook
4865 #include "elf32-target.h"
4867 /* VxWorks support. */
4869 #undef TARGET_LITTLE_SYM
4870 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4871 #undef TARGET_LITTLE_NAME
4872 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4875 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4877 static struct bfd_link_hash_table
*
4878 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4880 struct bfd_link_hash_table
*ret
;
4881 struct elf_i386_link_hash_table
*htab
;
4883 ret
= elf_i386_link_hash_table_create (abfd
);
4886 htab
= (struct elf_i386_link_hash_table
*) ret
;
4887 htab
->is_vxworks
= 1;
4888 htab
->plt0_pad_byte
= 0x90;
4895 #undef elf_backend_relocs_compatible
4896 #undef elf_backend_post_process_headers
4897 #undef bfd_elf32_bfd_link_hash_table_create
4898 #define bfd_elf32_bfd_link_hash_table_create \
4899 elf_i386_vxworks_link_hash_table_create
4900 #undef elf_backend_add_symbol_hook
4901 #define elf_backend_add_symbol_hook \
4902 elf_vxworks_add_symbol_hook
4903 #undef elf_backend_link_output_symbol_hook
4904 #define elf_backend_link_output_symbol_hook \
4905 elf_vxworks_link_output_symbol_hook
4906 #undef elf_backend_emit_relocs
4907 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4908 #undef elf_backend_final_write_processing
4909 #define elf_backend_final_write_processing \
4910 elf_vxworks_final_write_processing
4912 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4914 #undef elf_backend_want_plt_sym
4915 #define elf_backend_want_plt_sym 1
4918 #define elf32_bed elf32_i386_vxworks_bed
4920 #include "elf32-target.h"