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, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
28 #include "elf-vxworks.h"
29 #include "bfd_stdint.h"
33 /* 386 uses REL relocations instead of RELA. */
38 static reloc_howto_type elf_howto_table
[]=
40 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
41 bfd_elf_generic_reloc
, "R_386_NONE",
42 TRUE
, 0x00000000, 0x00000000, FALSE
),
43 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
44 bfd_elf_generic_reloc
, "R_386_32",
45 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
46 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
47 bfd_elf_generic_reloc
, "R_386_PC32",
48 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
49 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
50 bfd_elf_generic_reloc
, "R_386_GOT32",
51 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
52 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
53 bfd_elf_generic_reloc
, "R_386_PLT32",
54 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
55 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
56 bfd_elf_generic_reloc
, "R_386_COPY",
57 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
58 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
60 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
61 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
63 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
64 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_386_RELATIVE",
66 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
67 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_386_GOTOFF",
69 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
70 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
71 bfd_elf_generic_reloc
, "R_386_GOTPC",
72 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
74 /* We have a gap in the reloc numbers here.
75 R_386_standard counts the number up to this point, and
76 R_386_ext_offset is the value to subtract from a reloc type of
77 R_386_16 thru R_386_PC8 to form an index into this table. */
78 #define R_386_standard (R_386_GOTPC + 1)
79 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
81 /* These relocs are a GNU extension. */
82 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
84 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
85 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_386_TLS_IE",
87 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
88 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
90 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
91 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_386_TLS_LE",
93 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
94 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_386_TLS_GD",
96 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
97 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
99 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
100 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_386_16",
102 TRUE
, 0xffff, 0xffff, FALSE
),
103 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_386_PC16",
105 TRUE
, 0xffff, 0xffff, TRUE
),
106 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_386_8",
108 TRUE
, 0xff, 0xff, FALSE
),
109 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
110 bfd_elf_generic_reloc
, "R_386_PC8",
111 TRUE
, 0xff, 0xff, TRUE
),
113 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
114 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
115 /* These are common with Solaris TLS implementation. */
116 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
118 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
119 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
121 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
122 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
124 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
125 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
127 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
128 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
130 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
135 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
136 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
137 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
138 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
139 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
141 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
142 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
143 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
144 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
145 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
146 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
149 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
150 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
152 /* GNU extension to record C++ vtable hierarchy. */
153 HOWTO (R_386_GNU_VTINHERIT
, /* type */
155 2, /* size (0 = byte, 1 = short, 2 = long) */
157 FALSE
, /* pc_relative */
159 complain_overflow_dont
, /* complain_on_overflow */
160 NULL
, /* special_function */
161 "R_386_GNU_VTINHERIT", /* name */
162 FALSE
, /* partial_inplace */
165 FALSE
), /* pcrel_offset */
167 /* GNU extension to record C++ vtable member usage. */
168 HOWTO (R_386_GNU_VTENTRY
, /* type */
170 2, /* size (0 = byte, 1 = short, 2 = long) */
172 FALSE
, /* pc_relative */
174 complain_overflow_dont
, /* complain_on_overflow */
175 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
176 "R_386_GNU_VTENTRY", /* name */
177 FALSE
, /* partial_inplace */
180 FALSE
) /* pcrel_offset */
182 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
186 #ifdef DEBUG_GEN_RELOC
188 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
193 static reloc_howto_type
*
194 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
195 bfd_reloc_code_real_type code
)
200 TRACE ("BFD_RELOC_NONE");
201 return &elf_howto_table
[R_386_NONE
];
204 TRACE ("BFD_RELOC_32");
205 return &elf_howto_table
[R_386_32
];
208 TRACE ("BFD_RELOC_CTOR");
209 return &elf_howto_table
[R_386_32
];
211 case BFD_RELOC_32_PCREL
:
212 TRACE ("BFD_RELOC_PC32");
213 return &elf_howto_table
[R_386_PC32
];
215 case BFD_RELOC_386_GOT32
:
216 TRACE ("BFD_RELOC_386_GOT32");
217 return &elf_howto_table
[R_386_GOT32
];
219 case BFD_RELOC_386_PLT32
:
220 TRACE ("BFD_RELOC_386_PLT32");
221 return &elf_howto_table
[R_386_PLT32
];
223 case BFD_RELOC_386_COPY
:
224 TRACE ("BFD_RELOC_386_COPY");
225 return &elf_howto_table
[R_386_COPY
];
227 case BFD_RELOC_386_GLOB_DAT
:
228 TRACE ("BFD_RELOC_386_GLOB_DAT");
229 return &elf_howto_table
[R_386_GLOB_DAT
];
231 case BFD_RELOC_386_JUMP_SLOT
:
232 TRACE ("BFD_RELOC_386_JUMP_SLOT");
233 return &elf_howto_table
[R_386_JUMP_SLOT
];
235 case BFD_RELOC_386_RELATIVE
:
236 TRACE ("BFD_RELOC_386_RELATIVE");
237 return &elf_howto_table
[R_386_RELATIVE
];
239 case BFD_RELOC_386_GOTOFF
:
240 TRACE ("BFD_RELOC_386_GOTOFF");
241 return &elf_howto_table
[R_386_GOTOFF
];
243 case BFD_RELOC_386_GOTPC
:
244 TRACE ("BFD_RELOC_386_GOTPC");
245 return &elf_howto_table
[R_386_GOTPC
];
247 /* These relocs are a GNU extension. */
248 case BFD_RELOC_386_TLS_TPOFF
:
249 TRACE ("BFD_RELOC_386_TLS_TPOFF");
250 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
252 case BFD_RELOC_386_TLS_IE
:
253 TRACE ("BFD_RELOC_386_TLS_IE");
254 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
256 case BFD_RELOC_386_TLS_GOTIE
:
257 TRACE ("BFD_RELOC_386_TLS_GOTIE");
258 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
260 case BFD_RELOC_386_TLS_LE
:
261 TRACE ("BFD_RELOC_386_TLS_LE");
262 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
264 case BFD_RELOC_386_TLS_GD
:
265 TRACE ("BFD_RELOC_386_TLS_GD");
266 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
268 case BFD_RELOC_386_TLS_LDM
:
269 TRACE ("BFD_RELOC_386_TLS_LDM");
270 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
273 TRACE ("BFD_RELOC_16");
274 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
276 case BFD_RELOC_16_PCREL
:
277 TRACE ("BFD_RELOC_16_PCREL");
278 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
281 TRACE ("BFD_RELOC_8");
282 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
284 case BFD_RELOC_8_PCREL
:
285 TRACE ("BFD_RELOC_8_PCREL");
286 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
288 /* Common with Sun TLS implementation. */
289 case BFD_RELOC_386_TLS_LDO_32
:
290 TRACE ("BFD_RELOC_386_TLS_LDO_32");
291 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
293 case BFD_RELOC_386_TLS_IE_32
:
294 TRACE ("BFD_RELOC_386_TLS_IE_32");
295 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
297 case BFD_RELOC_386_TLS_LE_32
:
298 TRACE ("BFD_RELOC_386_TLS_LE_32");
299 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
301 case BFD_RELOC_386_TLS_DTPMOD32
:
302 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
303 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
305 case BFD_RELOC_386_TLS_DTPOFF32
:
306 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
307 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
309 case BFD_RELOC_386_TLS_TPOFF32
:
310 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
311 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
313 case BFD_RELOC_386_TLS_GOTDESC
:
314 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
315 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
317 case BFD_RELOC_386_TLS_DESC_CALL
:
318 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
319 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
321 case BFD_RELOC_386_TLS_DESC
:
322 TRACE ("BFD_RELOC_386_TLS_DESC");
323 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
325 case BFD_RELOC_386_IRELATIVE
:
326 TRACE ("BFD_RELOC_386_IRELATIVE");
327 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
329 case BFD_RELOC_VTABLE_INHERIT
:
330 TRACE ("BFD_RELOC_VTABLE_INHERIT");
331 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
333 case BFD_RELOC_VTABLE_ENTRY
:
334 TRACE ("BFD_RELOC_VTABLE_ENTRY");
335 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
345 static reloc_howto_type
*
346 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
351 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
352 if (elf_howto_table
[i
].name
!= NULL
353 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
354 return &elf_howto_table
[i
];
359 static reloc_howto_type
*
360 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
364 if ((indx
= r_type
) >= R_386_standard
365 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
366 >= R_386_ext
- R_386_standard
)
367 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
368 >= R_386_irelative
- R_386_ext
)
369 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
370 >= R_386_vt
- R_386_irelative
))
372 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
376 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
377 return &elf_howto_table
[indx
];
381 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
383 Elf_Internal_Rela
*dst
)
385 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
386 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
389 /* Return whether a symbol name implies a local label. The UnixWare
390 2.1 cc generates temporary symbols that start with .X, so we
391 recognize them here. FIXME: do other SVR4 compilers also use .X?.
392 If so, we should move the .X recognition into
393 _bfd_elf_is_local_label_name. */
396 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
398 if (name
[0] == '.' && name
[1] == 'X')
401 return _bfd_elf_is_local_label_name (abfd
, name
);
404 /* Support for core dump NOTE sections. */
407 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
412 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
414 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
420 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
423 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
427 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
431 switch (note
->descsz
)
436 case 144: /* Linux/i386 */
438 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
441 elf_tdata (abfd
)->core_lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
451 /* Make a ".reg/999" section. */
452 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
453 size
, note
->descpos
+ offset
);
457 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
459 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
461 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
466 elf_tdata (abfd
)->core_program
467 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
468 elf_tdata (abfd
)->core_command
469 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
473 switch (note
->descsz
)
478 case 124: /* Linux/i386 elf_prpsinfo. */
479 elf_tdata (abfd
)->core_pid
480 = bfd_get_32 (abfd
, note
->descdata
+ 12);
481 elf_tdata (abfd
)->core_program
482 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
483 elf_tdata (abfd
)->core_command
484 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
488 /* Note that for some reason, a spurious space is tacked
489 onto the end of the args in some (at least one anyway)
490 implementations, so strip it off if it exists. */
492 char *command
= elf_tdata (abfd
)->core_command
;
493 int n
= strlen (command
);
495 if (0 < n
&& command
[n
- 1] == ' ')
496 command
[n
- 1] = '\0';
502 /* Functions for the i386 ELF linker.
504 In order to gain some understanding of code in this file without
505 knowing all the intricate details of the linker, note the
508 Functions named elf_i386_* are called by external routines, other
509 functions are only called locally. elf_i386_* functions appear
510 in this file more or less in the order in which they are called
511 from external routines. eg. elf_i386_check_relocs is called
512 early in the link process, elf_i386_finish_dynamic_sections is
513 one of the last functions. */
516 /* The name of the dynamic interpreter. This is put in the .interp
519 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
521 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
522 copying dynamic variables from a shared lib into an app's dynbss
523 section, and instead use a dynamic relocation to point into the
525 #define ELIMINATE_COPY_RELOCS 1
527 /* The size in bytes of an entry in the procedure linkage table. */
529 #define PLT_ENTRY_SIZE 16
531 /* The first entry in an absolute procedure linkage table looks like
532 this. See the SVR4 ABI i386 supplement to see how this works.
533 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
535 static const bfd_byte elf_i386_plt0_entry
[12] =
537 0xff, 0x35, /* pushl contents of address */
538 0, 0, 0, 0, /* replaced with address of .got + 4. */
539 0xff, 0x25, /* jmp indirect */
540 0, 0, 0, 0 /* replaced with address of .got + 8. */
543 /* Subsequent entries in an absolute procedure linkage table look like
546 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
548 0xff, 0x25, /* jmp indirect */
549 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
550 0x68, /* pushl immediate */
551 0, 0, 0, 0, /* replaced with offset into relocation table. */
552 0xe9, /* jmp relative */
553 0, 0, 0, 0 /* replaced with offset to start of .plt. */
556 /* The first entry in a PIC procedure linkage table look like this.
557 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
559 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
561 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
562 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
565 /* Subsequent entries in a PIC procedure linkage table look like this. */
567 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
569 0xff, 0xa3, /* jmp *offset(%ebx) */
570 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
571 0x68, /* pushl immediate */
572 0, 0, 0, 0, /* replaced with offset into relocation table. */
573 0xe9, /* jmp relative */
574 0, 0, 0, 0 /* replaced with offset to start of .plt. */
577 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
578 for the PLTResolve stub and then for each PLT entry. */
579 #define PLTRESOLVE_RELOCS_SHLIB 0
580 #define PLTRESOLVE_RELOCS 2
581 #define PLT_NON_JUMP_SLOT_RELOCS 2
583 /* i386 ELF linker hash entry. */
585 struct elf_i386_link_hash_entry
587 struct elf_link_hash_entry elf
;
589 /* Track dynamic relocs copied for this symbol. */
590 struct elf_dyn_relocs
*dyn_relocs
;
592 #define GOT_UNKNOWN 0
596 #define GOT_TLS_IE_POS 5
597 #define GOT_TLS_IE_NEG 6
598 #define GOT_TLS_IE_BOTH 7
599 #define GOT_TLS_GDESC 8
600 #define GOT_TLS_GD_BOTH_P(type) \
601 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
602 #define GOT_TLS_GD_P(type) \
603 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
604 #define GOT_TLS_GDESC_P(type) \
605 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
606 #define GOT_TLS_GD_ANY_P(type) \
607 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
608 unsigned char tls_type
;
610 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
611 starting at the end of the jump table. */
615 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
617 struct elf_i386_obj_tdata
619 struct elf_obj_tdata root
;
621 /* tls_type for each local got entry. */
622 char *local_got_tls_type
;
624 /* GOTPLT entries for TLS descriptors. */
625 bfd_vma
*local_tlsdesc_gotent
;
628 #define elf_i386_tdata(abfd) \
629 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
631 #define elf_i386_local_got_tls_type(abfd) \
632 (elf_i386_tdata (abfd)->local_got_tls_type)
634 #define elf_i386_local_tlsdesc_gotent(abfd) \
635 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
637 #define is_i386_elf(bfd) \
638 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
639 && elf_tdata (bfd) != NULL \
640 && elf_object_id (bfd) == I386_ELF_DATA)
643 elf_i386_mkobject (bfd
*abfd
)
645 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
649 /* i386 ELF linker hash table. */
651 struct elf_i386_link_hash_table
653 struct elf_link_hash_table elf
;
655 /* Short-cuts to get to dynamic linker sections. */
661 bfd_signed_vma refcount
;
665 /* The amount of space used by the reserved portion of the sgotplt
666 section, plus whatever space is used by the jump slots. */
667 bfd_vma sgotplt_jump_table_size
;
669 /* Small local sym cache. */
670 struct sym_cache sym_cache
;
672 /* _TLS_MODULE_BASE_ symbol. */
673 struct bfd_link_hash_entry
*tls_module_base
;
675 /* Used by local STT_GNU_IFUNC symbols. */
676 htab_t loc_hash_table
;
677 void * loc_hash_memory
;
679 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
682 /* True if the target system is VxWorks. */
685 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
686 bfd_vma next_tls_desc_index
;
688 /* Value used to fill the last word of the first plt entry. */
689 bfd_byte plt0_pad_byte
;
692 /* Get the i386 ELF linker hash table from a link_info structure. */
694 #define elf_i386_hash_table(p) \
695 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
696 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
698 #define elf_i386_compute_jump_table_size(htab) \
699 ((htab)->next_tls_desc_index * 4)
701 /* Create an entry in an i386 ELF linker hash table. */
703 static struct bfd_hash_entry
*
704 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
705 struct bfd_hash_table
*table
,
708 /* Allocate the structure if it has not already been allocated by a
712 entry
= (struct bfd_hash_entry
*)
713 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
718 /* Call the allocation method of the superclass. */
719 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
722 struct elf_i386_link_hash_entry
*eh
;
724 eh
= (struct elf_i386_link_hash_entry
*) entry
;
725 eh
->dyn_relocs
= NULL
;
726 eh
->tls_type
= GOT_UNKNOWN
;
727 eh
->tlsdesc_got
= (bfd_vma
) -1;
733 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
734 for local symbol so that we can handle local STT_GNU_IFUNC symbols
735 as global symbol. We reuse indx and dynstr_index for local symbol
736 hash since they aren't used by global symbols in this backend. */
739 elf_i386_local_htab_hash (const void *ptr
)
741 struct elf_link_hash_entry
*h
742 = (struct elf_link_hash_entry
*) ptr
;
743 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
746 /* Compare local hash entries. */
749 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
751 struct elf_link_hash_entry
*h1
752 = (struct elf_link_hash_entry
*) ptr1
;
753 struct elf_link_hash_entry
*h2
754 = (struct elf_link_hash_entry
*) ptr2
;
756 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
759 /* Find and/or create a hash entry for local symbol. */
761 static struct elf_link_hash_entry
*
762 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
763 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
766 struct elf_i386_link_hash_entry e
, *ret
;
767 asection
*sec
= abfd
->sections
;
768 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
769 ELF32_R_SYM (rel
->r_info
));
772 e
.elf
.indx
= sec
->id
;
773 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
774 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
775 create
? INSERT
: NO_INSERT
);
782 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
786 ret
= (struct elf_i386_link_hash_entry
*)
787 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
788 sizeof (struct elf_i386_link_hash_entry
));
791 memset (ret
, 0, sizeof (*ret
));
792 ret
->elf
.indx
= sec
->id
;
793 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
794 ret
->elf
.dynindx
= -1;
800 /* Create an i386 ELF linker hash table. */
802 static struct bfd_link_hash_table
*
803 elf_i386_link_hash_table_create (bfd
*abfd
)
805 struct elf_i386_link_hash_table
*ret
;
806 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
808 ret
= (struct elf_i386_link_hash_table
*) bfd_malloc (amt
);
812 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
813 elf_i386_link_hash_newfunc
,
814 sizeof (struct elf_i386_link_hash_entry
),
823 ret
->tls_ldm_got
.refcount
= 0;
824 ret
->next_tls_desc_index
= 0;
825 ret
->sgotplt_jump_table_size
= 0;
826 ret
->sym_cache
.abfd
= NULL
;
828 ret
->srelplt2
= NULL
;
829 ret
->plt0_pad_byte
= 0;
830 ret
->tls_module_base
= NULL
;
832 ret
->loc_hash_table
= htab_try_create (1024,
833 elf_i386_local_htab_hash
,
834 elf_i386_local_htab_eq
,
836 ret
->loc_hash_memory
= objalloc_create ();
837 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
843 return &ret
->elf
.root
;
846 /* Destroy an i386 ELF linker hash table. */
849 elf_i386_link_hash_table_free (struct bfd_link_hash_table
*hash
)
851 struct elf_i386_link_hash_table
*htab
852 = (struct elf_i386_link_hash_table
*) hash
;
854 if (htab
->loc_hash_table
)
855 htab_delete (htab
->loc_hash_table
);
856 if (htab
->loc_hash_memory
)
857 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
858 _bfd_generic_link_hash_table_free (hash
);
861 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
862 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
866 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
868 struct elf_i386_link_hash_table
*htab
;
870 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
873 htab
= elf_i386_hash_table (info
);
877 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
879 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
882 || (!info
->shared
&& !htab
->srelbss
))
886 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
893 /* Copy the extra info we tack onto an elf_link_hash_entry. */
896 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
897 struct elf_link_hash_entry
*dir
,
898 struct elf_link_hash_entry
*ind
)
900 struct elf_i386_link_hash_entry
*edir
, *eind
;
902 edir
= (struct elf_i386_link_hash_entry
*) dir
;
903 eind
= (struct elf_i386_link_hash_entry
*) ind
;
905 if (eind
->dyn_relocs
!= NULL
)
907 if (edir
->dyn_relocs
!= NULL
)
909 struct elf_dyn_relocs
**pp
;
910 struct elf_dyn_relocs
*p
;
912 /* Add reloc counts against the indirect sym to the direct sym
913 list. Merge any entries against the same section. */
914 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
916 struct elf_dyn_relocs
*q
;
918 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
919 if (q
->sec
== p
->sec
)
921 q
->pc_count
+= p
->pc_count
;
922 q
->count
+= p
->count
;
929 *pp
= edir
->dyn_relocs
;
932 edir
->dyn_relocs
= eind
->dyn_relocs
;
933 eind
->dyn_relocs
= NULL
;
936 if (ind
->root
.type
== bfd_link_hash_indirect
937 && dir
->got
.refcount
<= 0)
939 edir
->tls_type
= eind
->tls_type
;
940 eind
->tls_type
= GOT_UNKNOWN
;
943 if (ELIMINATE_COPY_RELOCS
944 && ind
->root
.type
!= bfd_link_hash_indirect
945 && dir
->dynamic_adjusted
)
947 /* If called to transfer flags for a weakdef during processing
948 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
949 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
950 dir
->ref_dynamic
|= ind
->ref_dynamic
;
951 dir
->ref_regular
|= ind
->ref_regular
;
952 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
953 dir
->needs_plt
|= ind
->needs_plt
;
954 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
957 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
967 /* Return TRUE if the TLS access code sequence support transition
971 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
973 Elf_Internal_Shdr
*symtab_hdr
,
974 struct elf_link_hash_entry
**sym_hashes
,
976 const Elf_Internal_Rela
*rel
,
977 const Elf_Internal_Rela
*relend
)
979 unsigned int val
, type
;
980 unsigned long r_symndx
;
981 struct elf_link_hash_entry
*h
;
984 /* Get the section contents. */
985 if (contents
== NULL
)
987 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
988 contents
= elf_section_data (sec
)->this_hdr
.contents
;
991 /* FIXME: How to better handle error condition? */
992 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
995 /* Cache the section contents for elf_link_input_bfd. */
996 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1000 offset
= rel
->r_offset
;
1005 if (offset
< 2 || (rel
+ 1) >= relend
)
1008 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1009 if (r_type
== R_386_TLS_GD
)
1011 /* Check transition from GD access model. Only
1012 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1013 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1014 can transit to different access model. */
1015 if ((offset
+ 10) > sec
->size
||
1016 (type
!= 0x8d && type
!= 0x04))
1019 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1022 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1026 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1029 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1034 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1035 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1038 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1044 /* Check transition from LD access model. Only
1045 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1046 can transit to different access model. */
1047 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1050 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1051 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1055 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1058 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1059 if (r_symndx
< symtab_hdr
->sh_info
)
1062 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1063 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1064 may be versioned. */
1066 && h
->root
.root
.string
!= NULL
1067 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1068 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1069 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1073 /* Check transition from IE access model:
1074 movl foo@indntpoff(%rip), %eax
1075 movl foo@indntpoff(%rip), %reg
1076 addl foo@indntpoff(%rip), %reg
1079 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1082 /* Check "movl foo@tpoff(%rip), %eax" first. */
1083 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1090 /* Check movl|addl foo@tpoff(%rip), %reg. */
1091 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1092 return ((type
== 0x8b || type
== 0x03)
1093 && (val
& 0xc7) == 0x05);
1095 case R_386_TLS_GOTIE
:
1096 case R_386_TLS_IE_32
:
1097 /* Check transition from {IE_32,GOTIE} access model:
1098 subl foo@{tpoff,gontoff}(%reg1), %reg2
1099 movl foo@{tpoff,gontoff}(%reg1), %reg2
1100 addl foo@{tpoff,gontoff}(%reg1), %reg2
1103 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1106 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1107 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1110 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1111 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1113 case R_386_TLS_GOTDESC
:
1114 /* Check transition from GDesc access model:
1115 leal x@tlsdesc(%ebx), %eax
1117 Make sure it's a leal adding ebx to a 32-bit offset
1118 into any register, although it's probably almost always
1121 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1124 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1127 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1128 return (val
& 0xc7) == 0x83;
1130 case R_386_TLS_DESC_CALL
:
1131 /* Check transition from GDesc access model:
1132 call *x@tlsdesc(%rax)
1134 if (offset
+ 2 <= sec
->size
)
1136 /* Make sure that it's a call *x@tlsdesc(%rax). */
1137 static i386_opcode16 call
= { { 0xff, 0x10 } };
1138 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
1148 /* Return TRUE if the TLS access transition is OK or no transition
1149 will be performed. Update R_TYPE if there is a transition. */
1152 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1153 asection
*sec
, bfd_byte
*contents
,
1154 Elf_Internal_Shdr
*symtab_hdr
,
1155 struct elf_link_hash_entry
**sym_hashes
,
1156 unsigned int *r_type
, int tls_type
,
1157 const Elf_Internal_Rela
*rel
,
1158 const Elf_Internal_Rela
*relend
,
1159 struct elf_link_hash_entry
*h
,
1160 unsigned long r_symndx
)
1162 unsigned int from_type
= *r_type
;
1163 unsigned int to_type
= from_type
;
1164 bfd_boolean check
= TRUE
;
1166 /* Skip TLS transition for functions. */
1168 && (h
->type
== STT_FUNC
1169 || h
->type
== STT_GNU_IFUNC
))
1175 case R_386_TLS_GOTDESC
:
1176 case R_386_TLS_DESC_CALL
:
1177 case R_386_TLS_IE_32
:
1179 case R_386_TLS_GOTIE
:
1180 if (info
->executable
)
1183 to_type
= R_386_TLS_LE_32
;
1184 else if (from_type
!= R_386_TLS_IE
1185 && from_type
!= R_386_TLS_GOTIE
)
1186 to_type
= R_386_TLS_IE_32
;
1189 /* When we are called from elf_i386_relocate_section, CONTENTS
1190 isn't NULL and there may be additional transitions based on
1192 if (contents
!= NULL
)
1194 unsigned int new_to_type
= to_type
;
1196 if (info
->executable
1199 && (tls_type
& GOT_TLS_IE
))
1200 new_to_type
= R_386_TLS_LE_32
;
1202 if (to_type
== R_386_TLS_GD
1203 || to_type
== R_386_TLS_GOTDESC
1204 || to_type
== R_386_TLS_DESC_CALL
)
1206 if (tls_type
== GOT_TLS_IE_POS
)
1207 new_to_type
= R_386_TLS_GOTIE
;
1208 else if (tls_type
& GOT_TLS_IE
)
1209 new_to_type
= R_386_TLS_IE_32
;
1212 /* We checked the transition before when we were called from
1213 elf_i386_check_relocs. We only want to check the new
1214 transition which hasn't been checked before. */
1215 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1216 to_type
= new_to_type
;
1222 if (info
->executable
)
1223 to_type
= R_386_TLS_LE_32
;
1230 /* Return TRUE if there is no transition. */
1231 if (from_type
== to_type
)
1234 /* Check if the transition can be performed. */
1236 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1237 symtab_hdr
, sym_hashes
,
1238 from_type
, rel
, relend
))
1240 reloc_howto_type
*from
, *to
;
1243 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1244 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1247 name
= h
->root
.root
.string
;
1250 struct elf_i386_link_hash_table
*htab
;
1252 htab
= elf_i386_hash_table (info
);
1257 Elf_Internal_Sym
*isym
;
1259 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1261 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1265 (*_bfd_error_handler
)
1266 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1267 "in section `%A' failed"),
1268 abfd
, sec
, from
->name
, to
->name
, name
,
1269 (unsigned long) rel
->r_offset
);
1270 bfd_set_error (bfd_error_bad_value
);
1278 /* Look through the relocs for a section during the first phase, and
1279 calculate needed space in the global offset table, procedure linkage
1280 table, and dynamic reloc sections. */
1283 elf_i386_check_relocs (bfd
*abfd
,
1284 struct bfd_link_info
*info
,
1286 const Elf_Internal_Rela
*relocs
)
1288 struct elf_i386_link_hash_table
*htab
;
1289 Elf_Internal_Shdr
*symtab_hdr
;
1290 struct elf_link_hash_entry
**sym_hashes
;
1291 const Elf_Internal_Rela
*rel
;
1292 const Elf_Internal_Rela
*rel_end
;
1295 if (info
->relocatable
)
1298 BFD_ASSERT (is_i386_elf (abfd
));
1300 htab
= elf_i386_hash_table (info
);
1304 symtab_hdr
= &elf_symtab_hdr (abfd
);
1305 sym_hashes
= elf_sym_hashes (abfd
);
1309 rel_end
= relocs
+ sec
->reloc_count
;
1310 for (rel
= relocs
; rel
< rel_end
; rel
++)
1312 unsigned int r_type
;
1313 unsigned long r_symndx
;
1314 struct elf_link_hash_entry
*h
;
1315 Elf_Internal_Sym
*isym
;
1318 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1319 r_type
= ELF32_R_TYPE (rel
->r_info
);
1321 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1323 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1329 if (r_symndx
< symtab_hdr
->sh_info
)
1331 /* A local symbol. */
1332 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1337 /* Check relocation against local STT_GNU_IFUNC symbol. */
1338 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1340 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1344 /* Fake a STT_GNU_IFUNC symbol. */
1345 h
->type
= STT_GNU_IFUNC
;
1348 h
->forced_local
= 1;
1349 h
->root
.type
= bfd_link_hash_defined
;
1357 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1358 while (h
->root
.type
== bfd_link_hash_indirect
1359 || h
->root
.type
== bfd_link_hash_warning
)
1360 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1365 /* Create the ifunc sections for static executables. If we
1366 never see an indirect function symbol nor we are building
1367 a static executable, those sections will be empty and
1368 won't appear in output. */
1379 if (!_bfd_elf_create_ifunc_sections (abfd
, info
))
1384 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1385 it here if it is defined in a non-shared object. */
1386 if (h
->type
== STT_GNU_IFUNC
1389 /* It is referenced by a non-shared object. */
1393 /* STT_GNU_IFUNC symbol must go through PLT. */
1394 h
->plt
.refcount
+= 1;
1396 /* STT_GNU_IFUNC needs dynamic sections. */
1397 if (htab
->elf
.dynobj
== NULL
)
1398 htab
->elf
.dynobj
= abfd
;
1403 if (h
->root
.root
.string
)
1404 name
= h
->root
.root
.string
;
1406 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1408 (*_bfd_error_handler
)
1409 (_("%B: relocation %s against STT_GNU_IFUNC "
1410 "symbol `%s' isn't handled by %s"), abfd
,
1411 elf_howto_table
[r_type
].name
,
1412 name
, __FUNCTION__
);
1413 bfd_set_error (bfd_error_bad_value
);
1418 h
->pointer_equality_needed
= 1;
1421 /* We must copy these reloc types into the
1422 output file. Create a reloc section in
1423 dynobj and make room for this reloc. */
1424 sreloc
= _bfd_elf_create_ifunc_dyn_reloc
1425 (abfd
, info
, sec
, sreloc
,
1426 &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
);
1441 h
->got
.refcount
+= 1;
1442 if (htab
->elf
.sgot
== NULL
1443 && !_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1453 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1454 symtab_hdr
, sym_hashes
,
1455 &r_type
, GOT_UNKNOWN
,
1456 rel
, rel_end
, h
, r_symndx
))
1462 htab
->tls_ldm_got
.refcount
+= 1;
1466 /* This symbol requires a procedure linkage table entry. We
1467 actually build the entry in adjust_dynamic_symbol,
1468 because this might be a case of linking PIC code which is
1469 never referenced by a dynamic object, in which case we
1470 don't need to generate a procedure linkage table entry
1473 /* If this is a local symbol, we resolve it directly without
1474 creating a procedure linkage table entry. */
1479 h
->plt
.refcount
+= 1;
1482 case R_386_TLS_IE_32
:
1484 case R_386_TLS_GOTIE
:
1485 if (!info
->executable
)
1486 info
->flags
|= DF_STATIC_TLS
;
1491 case R_386_TLS_GOTDESC
:
1492 case R_386_TLS_DESC_CALL
:
1493 /* This symbol requires a global offset table entry. */
1495 int tls_type
, old_tls_type
;
1500 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1501 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1502 case R_386_TLS_GOTDESC
:
1503 case R_386_TLS_DESC_CALL
:
1504 tls_type
= GOT_TLS_GDESC
; break;
1505 case R_386_TLS_IE_32
:
1506 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1507 tls_type
= GOT_TLS_IE_NEG
;
1509 /* If this is a GD->IE transition, we may use either of
1510 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1511 tls_type
= GOT_TLS_IE
;
1514 case R_386_TLS_GOTIE
:
1515 tls_type
= GOT_TLS_IE_POS
; break;
1520 h
->got
.refcount
+= 1;
1521 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1525 bfd_signed_vma
*local_got_refcounts
;
1527 /* This is a global offset table entry for a local symbol. */
1528 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1529 if (local_got_refcounts
== NULL
)
1533 size
= symtab_hdr
->sh_info
;
1534 size
*= (sizeof (bfd_signed_vma
)
1535 + sizeof (bfd_vma
) + sizeof(char));
1536 local_got_refcounts
= (bfd_signed_vma
*)
1537 bfd_zalloc (abfd
, size
);
1538 if (local_got_refcounts
== NULL
)
1540 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1541 elf_i386_local_tlsdesc_gotent (abfd
)
1542 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1543 elf_i386_local_got_tls_type (abfd
)
1544 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1546 local_got_refcounts
[r_symndx
] += 1;
1547 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1550 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1551 tls_type
|= old_tls_type
;
1552 /* If a TLS symbol is accessed using IE at least once,
1553 there is no point to use dynamic model for it. */
1554 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1555 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1556 || (tls_type
& GOT_TLS_IE
) == 0))
1558 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1559 tls_type
= old_tls_type
;
1560 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1561 && GOT_TLS_GD_ANY_P (tls_type
))
1562 tls_type
|= old_tls_type
;
1566 name
= h
->root
.root
.string
;
1568 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1570 (*_bfd_error_handler
)
1571 (_("%B: `%s' accessed both as normal and "
1572 "thread local symbol"),
1578 if (old_tls_type
!= tls_type
)
1581 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1583 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1591 if (htab
->elf
.sgot
== NULL
)
1593 if (htab
->elf
.dynobj
== NULL
)
1594 htab
->elf
.dynobj
= abfd
;
1595 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1598 if (r_type
!= R_386_TLS_IE
)
1602 case R_386_TLS_LE_32
:
1604 if (info
->executable
)
1606 info
->flags
|= DF_STATIC_TLS
;
1611 if (h
!= NULL
&& info
->executable
)
1613 /* If this reloc is in a read-only section, we might
1614 need a copy reloc. We can't check reliably at this
1615 stage whether the section is read-only, as input
1616 sections have not yet been mapped to output sections.
1617 Tentatively set the flag for now, and correct in
1618 adjust_dynamic_symbol. */
1621 /* We may need a .plt entry if the function this reloc
1622 refers to is in a shared lib. */
1623 h
->plt
.refcount
+= 1;
1624 if (r_type
!= R_386_PC32
)
1625 h
->pointer_equality_needed
= 1;
1628 /* If we are creating a shared library, and this is a reloc
1629 against a global symbol, or a non PC relative reloc
1630 against a local symbol, then we need to copy the reloc
1631 into the shared library. However, if we are linking with
1632 -Bsymbolic, we do not need to copy a reloc against a
1633 global symbol which is defined in an object we are
1634 including in the link (i.e., DEF_REGULAR is set). At
1635 this point we have not seen all the input files, so it is
1636 possible that DEF_REGULAR is not set now but will be set
1637 later (it is never cleared). In case of a weak definition,
1638 DEF_REGULAR may be cleared later by a strong definition in
1639 a shared library. We account for that possibility below by
1640 storing information in the relocs_copied field of the hash
1641 table entry. A similar situation occurs when creating
1642 shared libraries and symbol visibility changes render the
1645 If on the other hand, we are creating an executable, we
1646 may need to keep relocations for symbols satisfied by a
1647 dynamic library if we manage to avoid copy relocs for the
1650 && (sec
->flags
& SEC_ALLOC
) != 0
1651 && (r_type
!= R_386_PC32
1653 && (! SYMBOLIC_BIND (info
, h
)
1654 || h
->root
.type
== bfd_link_hash_defweak
1655 || !h
->def_regular
))))
1656 || (ELIMINATE_COPY_RELOCS
1658 && (sec
->flags
& SEC_ALLOC
) != 0
1660 && (h
->root
.type
== bfd_link_hash_defweak
1661 || !h
->def_regular
)))
1663 struct elf_dyn_relocs
*p
;
1664 struct elf_dyn_relocs
**head
;
1666 /* We must copy these reloc types into the output file.
1667 Create a reloc section in dynobj and make room for
1671 if (htab
->elf
.dynobj
== NULL
)
1672 htab
->elf
.dynobj
= abfd
;
1674 sreloc
= _bfd_elf_make_dynamic_reloc_section
1675 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1681 /* If this is a global symbol, we count the number of
1682 relocations we need for this symbol. */
1685 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1689 /* Track dynamic relocs needed for local syms too.
1690 We really need local syms available to do this
1695 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1700 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1704 vpp
= &elf_section_data (s
)->local_dynrel
;
1705 head
= (struct elf_dyn_relocs
**)vpp
;
1709 if (p
== NULL
|| p
->sec
!= sec
)
1711 bfd_size_type amt
= sizeof *p
;
1712 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1724 if (r_type
== R_386_PC32
)
1729 /* This relocation describes the C++ object vtable hierarchy.
1730 Reconstruct it for later use during GC. */
1731 case R_386_GNU_VTINHERIT
:
1732 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1736 /* This relocation describes which C++ vtable entries are actually
1737 used. Record for later use during GC. */
1738 case R_386_GNU_VTENTRY
:
1739 BFD_ASSERT (h
!= NULL
);
1741 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1753 /* Return the section that should be marked against GC for a given
1757 elf_i386_gc_mark_hook (asection
*sec
,
1758 struct bfd_link_info
*info
,
1759 Elf_Internal_Rela
*rel
,
1760 struct elf_link_hash_entry
*h
,
1761 Elf_Internal_Sym
*sym
)
1764 switch (ELF32_R_TYPE (rel
->r_info
))
1766 case R_386_GNU_VTINHERIT
:
1767 case R_386_GNU_VTENTRY
:
1771 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1774 /* Update the got entry reference counts for the section being removed. */
1777 elf_i386_gc_sweep_hook (bfd
*abfd
,
1778 struct bfd_link_info
*info
,
1780 const Elf_Internal_Rela
*relocs
)
1782 struct elf_i386_link_hash_table
*htab
;
1783 Elf_Internal_Shdr
*symtab_hdr
;
1784 struct elf_link_hash_entry
**sym_hashes
;
1785 bfd_signed_vma
*local_got_refcounts
;
1786 const Elf_Internal_Rela
*rel
, *relend
;
1788 if (info
->relocatable
)
1791 htab
= elf_i386_hash_table (info
);
1795 elf_section_data (sec
)->local_dynrel
= NULL
;
1797 symtab_hdr
= &elf_symtab_hdr (abfd
);
1798 sym_hashes
= elf_sym_hashes (abfd
);
1799 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1801 relend
= relocs
+ sec
->reloc_count
;
1802 for (rel
= relocs
; rel
< relend
; rel
++)
1804 unsigned long r_symndx
;
1805 unsigned int r_type
;
1806 struct elf_link_hash_entry
*h
= NULL
;
1808 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1809 if (r_symndx
>= symtab_hdr
->sh_info
)
1811 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1812 while (h
->root
.type
== bfd_link_hash_indirect
1813 || h
->root
.type
== bfd_link_hash_warning
)
1814 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1818 /* A local symbol. */
1819 Elf_Internal_Sym
*isym
;
1821 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1824 /* Check relocation against local STT_GNU_IFUNC symbol. */
1826 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1828 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1836 struct elf_i386_link_hash_entry
*eh
;
1837 struct elf_dyn_relocs
**pp
;
1838 struct elf_dyn_relocs
*p
;
1840 eh
= (struct elf_i386_link_hash_entry
*) h
;
1841 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1844 /* Everything must go for SEC. */
1850 r_type
= ELF32_R_TYPE (rel
->r_info
);
1851 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1852 symtab_hdr
, sym_hashes
,
1853 &r_type
, GOT_UNKNOWN
,
1854 rel
, relend
, h
, r_symndx
))
1860 if (htab
->tls_ldm_got
.refcount
> 0)
1861 htab
->tls_ldm_got
.refcount
-= 1;
1865 case R_386_TLS_GOTDESC
:
1866 case R_386_TLS_DESC_CALL
:
1867 case R_386_TLS_IE_32
:
1869 case R_386_TLS_GOTIE
:
1873 if (h
->got
.refcount
> 0)
1874 h
->got
.refcount
-= 1;
1875 if (h
->type
== STT_GNU_IFUNC
)
1877 if (h
->plt
.refcount
> 0)
1878 h
->plt
.refcount
-= 1;
1881 else if (local_got_refcounts
!= NULL
)
1883 if (local_got_refcounts
[r_symndx
] > 0)
1884 local_got_refcounts
[r_symndx
] -= 1;
1891 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1898 if (h
->plt
.refcount
> 0)
1899 h
->plt
.refcount
-= 1;
1904 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
1906 if (h
->got
.refcount
> 0)
1907 h
->got
.refcount
-= 1;
1908 if (h
->plt
.refcount
> 0)
1909 h
->plt
.refcount
-= 1;
1921 /* Adjust a symbol defined by a dynamic object and referenced by a
1922 regular object. The current definition is in some section of the
1923 dynamic object, but we're not including those sections. We have to
1924 change the definition to something the rest of the link can
1928 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1929 struct elf_link_hash_entry
*h
)
1931 struct elf_i386_link_hash_table
*htab
;
1934 /* STT_GNU_IFUNC symbol must go through PLT. */
1935 if (h
->type
== STT_GNU_IFUNC
)
1937 if (h
->plt
.refcount
<= 0)
1939 h
->plt
.offset
= (bfd_vma
) -1;
1945 /* If this is a function, put it in the procedure linkage table. We
1946 will fill in the contents of the procedure linkage table later,
1947 when we know the address of the .got section. */
1948 if (h
->type
== STT_FUNC
1951 if (h
->plt
.refcount
<= 0
1952 || SYMBOL_CALLS_LOCAL (info
, h
)
1953 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1954 && h
->root
.type
== bfd_link_hash_undefweak
))
1956 /* This case can occur if we saw a PLT32 reloc in an input
1957 file, but the symbol was never referred to by a dynamic
1958 object, or if all references were garbage collected. In
1959 such a case, we don't actually need to build a procedure
1960 linkage table, and we can just do a PC32 reloc instead. */
1961 h
->plt
.offset
= (bfd_vma
) -1;
1968 /* It's possible that we incorrectly decided a .plt reloc was
1969 needed for an R_386_PC32 reloc to a non-function sym in
1970 check_relocs. We can't decide accurately between function and
1971 non-function syms in check-relocs; Objects loaded later in
1972 the link may change h->type. So fix it now. */
1973 h
->plt
.offset
= (bfd_vma
) -1;
1975 /* If this is a weak symbol, and there is a real definition, the
1976 processor independent code will have arranged for us to see the
1977 real definition first, and we can just use the same value. */
1978 if (h
->u
.weakdef
!= NULL
)
1980 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1981 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1982 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1983 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1984 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1985 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1989 /* This is a reference to a symbol defined by a dynamic object which
1990 is not a function. */
1992 /* If we are creating a shared library, we must presume that the
1993 only references to the symbol are via the global offset table.
1994 For such cases we need not do anything here; the relocations will
1995 be handled correctly by relocate_section. */
1999 /* If there are no references to this symbol that do not use the
2000 GOT, we don't need to generate a copy reloc. */
2001 if (!h
->non_got_ref
)
2004 /* If -z nocopyreloc was given, we won't generate them either. */
2005 if (info
->nocopyreloc
)
2011 htab
= elf_i386_hash_table (info
);
2015 /* If there aren't any dynamic relocs in read-only sections, then
2016 we can keep the dynamic relocs and avoid the copy reloc. This
2017 doesn't work on VxWorks, where we can not have dynamic relocations
2018 (other than copy and jump slot relocations) in an executable. */
2019 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
2021 struct elf_i386_link_hash_entry
* eh
;
2022 struct elf_dyn_relocs
*p
;
2024 eh
= (struct elf_i386_link_hash_entry
*) h
;
2025 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2027 s
= p
->sec
->output_section
;
2028 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2041 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
2042 h
->root
.root
.string
);
2046 /* We must allocate the symbol in our .dynbss section, which will
2047 become part of the .bss section of the executable. There will be
2048 an entry for this symbol in the .dynsym section. The dynamic
2049 object will contain position independent code, so all references
2050 from the dynamic object to this symbol will go through the global
2051 offset table. The dynamic linker will use the .dynsym entry to
2052 determine the address it must put in the global offset table, so
2053 both the dynamic object and the regular object will refer to the
2054 same memory location for the variable. */
2056 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2057 copy the initial value out of the dynamic object and into the
2058 runtime process image. */
2059 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2061 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2067 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2070 /* Allocate space in .plt, .got and associated reloc sections for
2074 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2076 struct bfd_link_info
*info
;
2077 struct elf_i386_link_hash_table
*htab
;
2078 struct elf_i386_link_hash_entry
*eh
;
2079 struct elf_dyn_relocs
*p
;
2081 if (h
->root
.type
== bfd_link_hash_indirect
)
2084 if (h
->root
.type
== bfd_link_hash_warning
)
2085 /* When warning symbols are created, they **replace** the "real"
2086 entry in the hash table, thus we never get to see the real
2087 symbol in a hash traversal. So look at it now. */
2088 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2089 eh
= (struct elf_i386_link_hash_entry
*) h
;
2091 info
= (struct bfd_link_info
*) inf
;
2092 htab
= elf_i386_hash_table (info
);
2096 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2097 here if it is defined and referenced in a non-shared object. */
2098 if (h
->type
== STT_GNU_IFUNC
2100 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2103 else if (htab
->elf
.dynamic_sections_created
2104 && h
->plt
.refcount
> 0)
2106 /* Make sure this symbol is output as a dynamic symbol.
2107 Undefined weak syms won't yet be marked as dynamic. */
2108 if (h
->dynindx
== -1
2109 && !h
->forced_local
)
2111 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2116 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2118 asection
*s
= htab
->elf
.splt
;
2120 /* If this is the first .plt entry, make room for the special
2123 s
->size
+= PLT_ENTRY_SIZE
;
2125 h
->plt
.offset
= s
->size
;
2127 /* If this symbol is not defined in a regular file, and we are
2128 not generating a shared library, then set the symbol to this
2129 location in the .plt. This is required to make function
2130 pointers compare as equal between the normal executable and
2131 the shared library. */
2135 h
->root
.u
.def
.section
= s
;
2136 h
->root
.u
.def
.value
= h
->plt
.offset
;
2139 /* Make room for this entry. */
2140 s
->size
+= PLT_ENTRY_SIZE
;
2142 /* We also need to make an entry in the .got.plt section, which
2143 will be placed in the .got section by the linker script. */
2144 htab
->elf
.sgotplt
->size
+= 4;
2146 /* We also need to make an entry in the .rel.plt section. */
2147 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2148 htab
->next_tls_desc_index
++;
2150 if (htab
->is_vxworks
&& !info
->shared
)
2152 /* VxWorks has a second set of relocations for each PLT entry
2153 in executables. They go in a separate relocation section,
2154 which is processed by the kernel loader. */
2156 /* There are two relocations for the initial PLT entry: an
2157 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2158 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2160 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
2161 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2163 /* There are two extra relocations for each subsequent PLT entry:
2164 an R_386_32 relocation for the GOT entry, and an R_386_32
2165 relocation for the PLT entry. */
2167 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2172 h
->plt
.offset
= (bfd_vma
) -1;
2178 h
->plt
.offset
= (bfd_vma
) -1;
2182 eh
->tlsdesc_got
= (bfd_vma
) -1;
2184 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2185 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2186 if (h
->got
.refcount
> 0
2189 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2190 h
->got
.offset
= (bfd_vma
) -1;
2191 else if (h
->got
.refcount
> 0)
2195 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2197 /* Make sure this symbol is output as a dynamic symbol.
2198 Undefined weak syms won't yet be marked as dynamic. */
2199 if (h
->dynindx
== -1
2200 && !h
->forced_local
)
2202 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2207 if (GOT_TLS_GDESC_P (tls_type
))
2209 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2210 - elf_i386_compute_jump_table_size (htab
);
2211 htab
->elf
.sgotplt
->size
+= 8;
2212 h
->got
.offset
= (bfd_vma
) -2;
2214 if (! GOT_TLS_GDESC_P (tls_type
)
2215 || GOT_TLS_GD_P (tls_type
))
2217 h
->got
.offset
= s
->size
;
2219 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2220 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2223 dyn
= htab
->elf
.dynamic_sections_created
;
2224 /* R_386_TLS_IE_32 needs one dynamic relocation,
2225 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2226 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2227 need two), R_386_TLS_GD needs one if local symbol and two if
2229 if (tls_type
== GOT_TLS_IE_BOTH
)
2230 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2231 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2232 || (tls_type
& GOT_TLS_IE
))
2233 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2234 else if (GOT_TLS_GD_P (tls_type
))
2235 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2236 else if (! GOT_TLS_GDESC_P (tls_type
)
2237 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2238 || h
->root
.type
!= bfd_link_hash_undefweak
)
2240 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2241 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2242 if (GOT_TLS_GDESC_P (tls_type
))
2243 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2246 h
->got
.offset
= (bfd_vma
) -1;
2248 if (eh
->dyn_relocs
== NULL
)
2251 /* In the shared -Bsymbolic case, discard space allocated for
2252 dynamic pc-relative relocs against symbols which turn out to be
2253 defined in regular objects. For the normal shared case, discard
2254 space for pc-relative relocs that have become local due to symbol
2255 visibility changes. */
2259 /* The only reloc that uses pc_count is R_386_PC32, which will
2260 appear on a call or on something like ".long foo - .". We
2261 want calls to protected symbols to resolve directly to the
2262 function rather than going via the plt. If people want
2263 function pointer comparisons to work as expected then they
2264 should avoid writing assembly like ".long foo - .". */
2265 if (SYMBOL_CALLS_LOCAL (info
, h
))
2267 struct elf_dyn_relocs
**pp
;
2269 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2271 p
->count
-= p
->pc_count
;
2280 if (htab
->is_vxworks
)
2282 struct elf_dyn_relocs
**pp
;
2283 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2285 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2292 /* Also discard relocs on undefined weak syms with non-default
2294 if (eh
->dyn_relocs
!= NULL
2295 && h
->root
.type
== bfd_link_hash_undefweak
)
2297 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2298 eh
->dyn_relocs
= NULL
;
2300 /* Make sure undefined weak symbols are output as a dynamic
2302 else if (h
->dynindx
== -1
2303 && !h
->forced_local
)
2305 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2310 else if (ELIMINATE_COPY_RELOCS
)
2312 /* For the non-shared case, discard space for relocs against
2313 symbols which turn out to need copy relocs or are not
2319 || (htab
->elf
.dynamic_sections_created
2320 && (h
->root
.type
== bfd_link_hash_undefweak
2321 || h
->root
.type
== bfd_link_hash_undefined
))))
2323 /* Make sure this symbol is output as a dynamic symbol.
2324 Undefined weak syms won't yet be marked as dynamic. */
2325 if (h
->dynindx
== -1
2326 && !h
->forced_local
)
2328 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2332 /* If that succeeded, we know we'll be keeping all the
2334 if (h
->dynindx
!= -1)
2338 eh
->dyn_relocs
= NULL
;
2343 /* Finally, allocate space. */
2344 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2348 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2350 BFD_ASSERT (sreloc
!= NULL
);
2351 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2357 /* Allocate space in .plt, .got and associated reloc sections for
2358 local dynamic relocs. */
2361 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2363 struct elf_link_hash_entry
*h
2364 = (struct elf_link_hash_entry
*) *slot
;
2366 if (h
->type
!= STT_GNU_IFUNC
2370 || h
->root
.type
!= bfd_link_hash_defined
)
2373 return elf_i386_allocate_dynrelocs (h
, inf
);
2376 /* Find any dynamic relocs that apply to read-only sections. */
2379 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2381 struct elf_i386_link_hash_entry
*eh
;
2382 struct elf_dyn_relocs
*p
;
2384 if (h
->root
.type
== bfd_link_hash_warning
)
2385 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2387 /* Skip local IFUNC symbols. */
2388 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2391 eh
= (struct elf_i386_link_hash_entry
*) h
;
2392 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2394 asection
*s
= p
->sec
->output_section
;
2396 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2398 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2400 info
->flags
|= DF_TEXTREL
;
2402 /* Not an error, just cut short the traversal. */
2409 /* Set the sizes of the dynamic sections. */
2412 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2413 struct bfd_link_info
*info
)
2415 struct elf_i386_link_hash_table
*htab
;
2421 htab
= elf_i386_hash_table (info
);
2424 dynobj
= htab
->elf
.dynobj
;
2428 if (htab
->elf
.dynamic_sections_created
)
2430 /* Set the contents of the .interp section to the interpreter. */
2431 if (info
->executable
)
2433 s
= bfd_get_section_by_name (dynobj
, ".interp");
2436 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2437 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2441 /* Set up .got offsets for local syms, and space for local dynamic
2443 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2445 bfd_signed_vma
*local_got
;
2446 bfd_signed_vma
*end_local_got
;
2447 char *local_tls_type
;
2448 bfd_vma
*local_tlsdesc_gotent
;
2449 bfd_size_type locsymcount
;
2450 Elf_Internal_Shdr
*symtab_hdr
;
2453 if (! is_i386_elf (ibfd
))
2456 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2458 struct elf_dyn_relocs
*p
;
2460 for (p
= ((struct elf_dyn_relocs
*)
2461 elf_section_data (s
)->local_dynrel
);
2465 if (!bfd_is_abs_section (p
->sec
)
2466 && bfd_is_abs_section (p
->sec
->output_section
))
2468 /* Input section has been discarded, either because
2469 it is a copy of a linkonce section or due to
2470 linker script /DISCARD/, so we'll be discarding
2473 else if (htab
->is_vxworks
2474 && strcmp (p
->sec
->output_section
->name
,
2477 /* Relocations in vxworks .tls_vars sections are
2478 handled specially by the loader. */
2480 else if (p
->count
!= 0)
2482 srel
= elf_section_data (p
->sec
)->sreloc
;
2483 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2484 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2485 info
->flags
|= DF_TEXTREL
;
2490 local_got
= elf_local_got_refcounts (ibfd
);
2494 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2495 locsymcount
= symtab_hdr
->sh_info
;
2496 end_local_got
= local_got
+ locsymcount
;
2497 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2498 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2500 srel
= htab
->elf
.srelgot
;
2501 for (; local_got
< end_local_got
;
2502 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2504 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2507 if (GOT_TLS_GDESC_P (*local_tls_type
))
2509 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2510 - elf_i386_compute_jump_table_size (htab
);
2511 htab
->elf
.sgotplt
->size
+= 8;
2512 *local_got
= (bfd_vma
) -2;
2514 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2515 || GOT_TLS_GD_P (*local_tls_type
))
2517 *local_got
= s
->size
;
2519 if (GOT_TLS_GD_P (*local_tls_type
)
2520 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2524 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2525 || (*local_tls_type
& GOT_TLS_IE
))
2527 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2528 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2529 else if (GOT_TLS_GD_P (*local_tls_type
)
2530 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2531 srel
->size
+= sizeof (Elf32_External_Rel
);
2532 if (GOT_TLS_GDESC_P (*local_tls_type
))
2533 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2537 *local_got
= (bfd_vma
) -1;
2541 if (htab
->tls_ldm_got
.refcount
> 0)
2543 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2545 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2546 htab
->elf
.sgot
->size
+= 8;
2547 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2550 htab
->tls_ldm_got
.offset
= -1;
2552 /* Allocate global sym .plt and .got entries, and space for global
2553 sym dynamic relocs. */
2554 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2556 /* Allocate .plt and .got entries, and space for local symbols. */
2557 htab_traverse (htab
->loc_hash_table
,
2558 elf_i386_allocate_local_dynrelocs
,
2561 /* For every jump slot reserved in the sgotplt, reloc_count is
2562 incremented. However, when we reserve space for TLS descriptors,
2563 it's not incremented, so in order to compute the space reserved
2564 for them, it suffices to multiply the reloc count by the jump
2566 if (htab
->elf
.srelplt
)
2567 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2569 if (htab
->elf
.sgotplt
)
2571 struct elf_link_hash_entry
*got
;
2572 got
= elf_link_hash_lookup (elf_hash_table (info
),
2573 "_GLOBAL_OFFSET_TABLE_",
2574 FALSE
, FALSE
, FALSE
);
2576 /* Don't allocate .got.plt section if there are no GOT nor PLT
2577 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2579 || !got
->ref_regular_nonweak
)
2580 && (htab
->elf
.sgotplt
->size
2581 == get_elf_backend_data (output_bfd
)->got_header_size
)
2582 && (htab
->elf
.splt
== NULL
2583 || htab
->elf
.splt
->size
== 0)
2584 && (htab
->elf
.sgot
== NULL
2585 || htab
->elf
.sgot
->size
== 0)
2586 && (htab
->elf
.iplt
== NULL
2587 || htab
->elf
.iplt
->size
== 0)
2588 && (htab
->elf
.igotplt
== NULL
2589 || htab
->elf
.igotplt
->size
== 0))
2590 htab
->elf
.sgotplt
->size
= 0;
2593 /* We now have determined the sizes of the various dynamic sections.
2594 Allocate memory for them. */
2596 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2598 bfd_boolean strip_section
= TRUE
;
2600 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2603 if (s
== htab
->elf
.splt
2604 || s
== htab
->elf
.sgot
2605 || s
== htab
->elf
.sgotplt
2606 || s
== htab
->elf
.iplt
2607 || s
== htab
->elf
.igotplt
2608 || s
== htab
->sdynbss
)
2610 /* Strip this section if we don't need it; see the
2612 /* We'd like to strip these sections if they aren't needed, but if
2613 we've exported dynamic symbols from them we must leave them.
2614 It's too late to tell BFD to get rid of the symbols. */
2616 if (htab
->elf
.hplt
!= NULL
)
2617 strip_section
= FALSE
;
2619 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2622 && s
!= htab
->elf
.srelplt
2623 && s
!= htab
->srelplt2
)
2626 /* We use the reloc_count field as a counter if we need
2627 to copy relocs into the output file. */
2632 /* It's not one of our sections, so don't allocate space. */
2638 /* If we don't need this section, strip it from the
2639 output file. This is mostly to handle .rel.bss and
2640 .rel.plt. We must create both sections in
2641 create_dynamic_sections, because they must be created
2642 before the linker maps input sections to output
2643 sections. The linker does that before
2644 adjust_dynamic_symbol is called, and it is that
2645 function which decides whether anything needs to go
2646 into these sections. */
2648 s
->flags
|= SEC_EXCLUDE
;
2652 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2655 /* Allocate memory for the section contents. We use bfd_zalloc
2656 here in case unused entries are not reclaimed before the
2657 section's contents are written out. This should not happen,
2658 but this way if it does, we get a R_386_NONE reloc instead
2660 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2661 if (s
->contents
== NULL
)
2665 if (htab
->elf
.dynamic_sections_created
)
2667 /* Add some entries to the .dynamic section. We fill in the
2668 values later, in elf_i386_finish_dynamic_sections, but we
2669 must add the entries now so that we get the correct size for
2670 the .dynamic section. The DT_DEBUG entry is filled in by the
2671 dynamic linker and used by the debugger. */
2672 #define add_dynamic_entry(TAG, VAL) \
2673 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2675 if (info
->executable
)
2677 if (!add_dynamic_entry (DT_DEBUG
, 0))
2681 if (htab
->elf
.splt
->size
!= 0)
2683 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2684 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2685 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2686 || !add_dynamic_entry (DT_JMPREL
, 0))
2692 if (!add_dynamic_entry (DT_REL
, 0)
2693 || !add_dynamic_entry (DT_RELSZ
, 0)
2694 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2697 /* If any dynamic relocs apply to a read-only section,
2698 then we need a DT_TEXTREL entry. */
2699 if ((info
->flags
& DF_TEXTREL
) == 0)
2700 elf_link_hash_traverse (&htab
->elf
,
2701 elf_i386_readonly_dynrelocs
, info
);
2703 if ((info
->flags
& DF_TEXTREL
) != 0)
2705 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2709 if (htab
->is_vxworks
2710 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2713 #undef add_dynamic_entry
2719 elf_i386_always_size_sections (bfd
*output_bfd
,
2720 struct bfd_link_info
*info
)
2722 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2726 struct elf_link_hash_entry
*tlsbase
;
2728 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2729 "_TLS_MODULE_BASE_",
2730 FALSE
, FALSE
, FALSE
);
2732 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2734 struct elf_i386_link_hash_table
*htab
;
2735 struct bfd_link_hash_entry
*bh
= NULL
;
2736 const struct elf_backend_data
*bed
2737 = get_elf_backend_data (output_bfd
);
2739 htab
= elf_i386_hash_table (info
);
2743 if (!(_bfd_generic_link_add_one_symbol
2744 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2745 tls_sec
, 0, NULL
, FALSE
,
2746 bed
->collect
, &bh
)))
2749 htab
->tls_module_base
= bh
;
2751 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2752 tlsbase
->def_regular
= 1;
2753 tlsbase
->other
= STV_HIDDEN
;
2754 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2761 /* Set the correct type for an x86 ELF section. We do this by the
2762 section name, which is a hack, but ought to work. */
2765 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2766 Elf_Internal_Shdr
*hdr
,
2771 name
= bfd_get_section_name (abfd
, sec
);
2773 /* This is an ugly, but unfortunately necessary hack that is
2774 needed when producing EFI binaries on x86. It tells
2775 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2776 containing ELF relocation info. We need this hack in order to
2777 be able to generate ELF binaries that can be translated into
2778 EFI applications (which are essentially COFF objects). Those
2779 files contain a COFF ".reloc" section inside an ELFNN object,
2780 which would normally cause BFD to segfault because it would
2781 attempt to interpret this section as containing relocation
2782 entries for section "oc". With this hack enabled, ".reloc"
2783 will be treated as a normal data section, which will avoid the
2784 segfault. However, you won't be able to create an ELFNN binary
2785 with a section named "oc" that needs relocations, but that's
2786 the kind of ugly side-effects you get when detecting section
2787 types based on their names... In practice, this limitation is
2788 unlikely to bite. */
2789 if (strcmp (name
, ".reloc") == 0)
2790 hdr
->sh_type
= SHT_PROGBITS
;
2795 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2796 executables. Rather than setting it to the beginning of the TLS
2797 section, we have to set it to the end. This function may be called
2798 multiple times, it is idempotent. */
2801 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2803 struct elf_i386_link_hash_table
*htab
;
2804 struct bfd_link_hash_entry
*base
;
2806 if (!info
->executable
)
2809 htab
= elf_i386_hash_table (info
);
2813 base
= htab
->tls_module_base
;
2817 base
->u
.def
.value
= htab
->elf
.tls_size
;
2820 /* Return the base VMA address which should be subtracted from real addresses
2821 when resolving @dtpoff relocation.
2822 This is PT_TLS segment p_vaddr. */
2825 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2827 /* If tls_sec is NULL, we should have signalled an error already. */
2828 if (elf_hash_table (info
)->tls_sec
== NULL
)
2830 return elf_hash_table (info
)->tls_sec
->vma
;
2833 /* Return the relocation value for @tpoff relocation
2834 if STT_TLS virtual address is ADDRESS. */
2837 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2839 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2840 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2841 bfd_vma static_tls_size
;
2843 /* If tls_sec is NULL, we should have signalled an error already. */
2844 if (htab
->tls_sec
== NULL
)
2847 /* Consider special static TLS alignment requirements. */
2848 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2849 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
2852 /* Relocate an i386 ELF section. */
2855 elf_i386_relocate_section (bfd
*output_bfd
,
2856 struct bfd_link_info
*info
,
2858 asection
*input_section
,
2860 Elf_Internal_Rela
*relocs
,
2861 Elf_Internal_Sym
*local_syms
,
2862 asection
**local_sections
)
2864 struct elf_i386_link_hash_table
*htab
;
2865 Elf_Internal_Shdr
*symtab_hdr
;
2866 struct elf_link_hash_entry
**sym_hashes
;
2867 bfd_vma
*local_got_offsets
;
2868 bfd_vma
*local_tlsdesc_gotents
;
2869 Elf_Internal_Rela
*rel
;
2870 Elf_Internal_Rela
*relend
;
2871 bfd_boolean is_vxworks_tls
;
2873 BFD_ASSERT (is_i386_elf (input_bfd
));
2875 htab
= elf_i386_hash_table (info
);
2878 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2879 sym_hashes
= elf_sym_hashes (input_bfd
);
2880 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2881 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2882 /* We have to handle relocations in vxworks .tls_vars sections
2883 specially, because the dynamic loader is 'weird'. */
2884 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2885 && !strcmp (input_section
->output_section
->name
,
2888 elf_i386_set_tls_module_base (info
);
2891 relend
= relocs
+ input_section
->reloc_count
;
2892 for (; rel
< relend
; rel
++)
2894 unsigned int r_type
;
2895 reloc_howto_type
*howto
;
2896 unsigned long r_symndx
;
2897 struct elf_link_hash_entry
*h
;
2898 Elf_Internal_Sym
*sym
;
2900 bfd_vma off
, offplt
;
2902 bfd_boolean unresolved_reloc
;
2903 bfd_reloc_status_type r
;
2907 r_type
= ELF32_R_TYPE (rel
->r_info
);
2908 if (r_type
== R_386_GNU_VTINHERIT
2909 || r_type
== R_386_GNU_VTENTRY
)
2912 if ((indx
= r_type
) >= R_386_standard
2913 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2914 >= R_386_ext
- R_386_standard
)
2915 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2916 >= R_386_irelative
- R_386_ext
))
2918 (*_bfd_error_handler
)
2919 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2920 input_bfd
, input_section
, r_type
);
2921 bfd_set_error (bfd_error_bad_value
);
2924 howto
= elf_howto_table
+ indx
;
2926 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2930 unresolved_reloc
= FALSE
;
2931 if (r_symndx
< symtab_hdr
->sh_info
)
2933 sym
= local_syms
+ r_symndx
;
2934 sec
= local_sections
[r_symndx
];
2935 relocation
= (sec
->output_section
->vma
2936 + sec
->output_offset
2939 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2940 && ((sec
->flags
& SEC_MERGE
) != 0
2941 || (info
->relocatable
2942 && sec
->output_offset
!= 0)))
2945 bfd_byte
*where
= contents
+ rel
->r_offset
;
2947 switch (howto
->size
)
2950 addend
= bfd_get_8 (input_bfd
, where
);
2951 if (howto
->pc_relative
)
2953 addend
= (addend
^ 0x80) - 0x80;
2958 addend
= bfd_get_16 (input_bfd
, where
);
2959 if (howto
->pc_relative
)
2961 addend
= (addend
^ 0x8000) - 0x8000;
2966 addend
= bfd_get_32 (input_bfd
, where
);
2967 if (howto
->pc_relative
)
2969 addend
= (addend
^ 0x80000000) - 0x80000000;
2977 if (info
->relocatable
)
2978 addend
+= sec
->output_offset
;
2981 asection
*msec
= sec
;
2982 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2984 addend
-= relocation
;
2985 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2988 switch (howto
->size
)
2991 /* FIXME: overflow checks. */
2992 if (howto
->pc_relative
)
2994 bfd_put_8 (input_bfd
, addend
, where
);
2997 if (howto
->pc_relative
)
2999 bfd_put_16 (input_bfd
, addend
, where
);
3002 if (howto
->pc_relative
)
3004 bfd_put_32 (input_bfd
, addend
, where
);
3008 else if (!info
->relocatable
3009 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3011 /* Relocate against local STT_GNU_IFUNC symbol. */
3012 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3017 /* Set STT_GNU_IFUNC symbol value. */
3018 h
->root
.u
.def
.value
= sym
->st_value
;
3019 h
->root
.u
.def
.section
= sec
;
3024 bfd_boolean warned ATTRIBUTE_UNUSED
;
3026 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3027 r_symndx
, symtab_hdr
, sym_hashes
,
3029 unresolved_reloc
, warned
);
3032 if (sec
!= NULL
&& elf_discarded_section (sec
))
3033 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3034 rel
, relend
, howto
, contents
);
3036 if (info
->relocatable
)
3039 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3040 it here if it is defined in a non-shared object. */
3042 && h
->type
== STT_GNU_IFUNC
3045 asection
*plt
, *gotplt
, *base_got
;
3049 if ((input_section
->flags
& SEC_ALLOC
) == 0
3050 || h
->plt
.offset
== (bfd_vma
) -1)
3053 /* STT_GNU_IFUNC symbol must go through PLT. */
3054 if (htab
->elf
.splt
!= NULL
)
3056 plt
= htab
->elf
.splt
;
3057 gotplt
= htab
->elf
.sgotplt
;
3061 plt
= htab
->elf
.iplt
;
3062 gotplt
= htab
->elf
.igotplt
;
3065 relocation
= (plt
->output_section
->vma
3066 + plt
->output_offset
+ h
->plt
.offset
);
3071 if (h
->root
.root
.string
)
3072 name
= h
->root
.root
.string
;
3074 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3076 (*_bfd_error_handler
)
3077 (_("%B: relocation %s against STT_GNU_IFUNC "
3078 "symbol `%s' isn't handled by %s"), input_bfd
,
3079 elf_howto_table
[r_type
].name
,
3080 name
, __FUNCTION__
);
3081 bfd_set_error (bfd_error_bad_value
);
3085 /* Generate dynamic relcoation only when there is a
3086 non-GOF reference in a shared object. */
3087 if (info
->shared
&& h
->non_got_ref
)
3089 Elf_Internal_Rela outrel
;
3094 /* Need a dynamic relocation to get the real function
3096 offset
= _bfd_elf_section_offset (output_bfd
,
3100 if (offset
== (bfd_vma
) -1
3101 || offset
== (bfd_vma
) -2)
3104 outrel
.r_offset
= (input_section
->output_section
->vma
3105 + input_section
->output_offset
3108 if (h
->dynindx
== -1
3110 || info
->executable
)
3112 /* This symbol is resolved locally. */
3113 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3114 bfd_put_32 (output_bfd
,
3115 (h
->root
.u
.def
.value
3116 + h
->root
.u
.def
.section
->output_section
->vma
3117 + h
->root
.u
.def
.section
->output_offset
),
3121 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3123 sreloc
= htab
->elf
.irelifunc
;
3124 loc
= sreloc
->contents
;
3125 loc
+= (sreloc
->reloc_count
++
3126 * sizeof (Elf32_External_Rel
));
3127 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3129 /* If this reloc is against an external symbol, we
3130 do not want to fiddle with the addend. Otherwise,
3131 we need to include the symbol value so that it
3132 becomes an addend for the dynamic reloc. For an
3133 internal symbol, we have updated addend. */
3142 base_got
= htab
->elf
.sgot
;
3143 off
= h
->got
.offset
;
3145 if (base_got
== NULL
)
3148 if (off
== (bfd_vma
) -1)
3150 /* We can't use h->got.offset here to save state, or
3151 even just remember the offset, as finish_dynamic_symbol
3152 would use that as offset into .got. */
3154 if (htab
->elf
.splt
!= NULL
)
3156 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3157 off
= (plt_index
+ 3) * 4;
3158 base_got
= htab
->elf
.sgotplt
;
3162 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3163 off
= plt_index
* 4;
3164 base_got
= htab
->elf
.igotplt
;
3167 if (h
->dynindx
== -1
3171 /* This references the local defitionion. We must
3172 initialize this entry in the global offset table.
3173 Since the offset must always be a multiple of 8,
3174 we use the least significant bit to record
3175 whether we have initialized it already.
3177 When doing a dynamic link, we create a .rela.got
3178 relocation entry to initialize the value. This
3179 is done in the finish_dynamic_symbol routine. */
3184 bfd_put_32 (output_bfd
, relocation
,
3185 base_got
->contents
+ off
);
3192 /* Adjust for static executables. */
3193 if (htab
->elf
.splt
== NULL
)
3194 relocation
+= gotplt
->output_offset
;
3198 relocation
= (base_got
->output_section
->vma
3199 + base_got
->output_offset
+ off
3200 - gotplt
->output_section
->vma
3201 - gotplt
->output_offset
);
3202 /* Adjust for static executables. */
3203 if (htab
->elf
.splt
== NULL
)
3204 relocation
+= gotplt
->output_offset
;
3210 relocation
-= (gotplt
->output_section
->vma
3211 + gotplt
->output_offset
);
3219 /* Relocation is to the entry for this symbol in the global
3221 if (htab
->elf
.sgot
== NULL
)
3228 off
= h
->got
.offset
;
3229 dyn
= htab
->elf
.dynamic_sections_created
;
3230 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3232 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3233 || (ELF_ST_VISIBILITY (h
->other
)
3234 && h
->root
.type
== bfd_link_hash_undefweak
))
3236 /* This is actually a static link, or it is a
3237 -Bsymbolic link and the symbol is defined
3238 locally, or the symbol was forced to be local
3239 because of a version file. We must initialize
3240 this entry in the global offset table. Since the
3241 offset must always be a multiple of 4, we use the
3242 least significant bit to record whether we have
3243 initialized it already.
3245 When doing a dynamic link, we create a .rel.got
3246 relocation entry to initialize the value. This
3247 is done in the finish_dynamic_symbol routine. */
3252 bfd_put_32 (output_bfd
, relocation
,
3253 htab
->elf
.sgot
->contents
+ off
);
3258 unresolved_reloc
= FALSE
;
3262 if (local_got_offsets
== NULL
)
3265 off
= local_got_offsets
[r_symndx
];
3267 /* The offset must always be a multiple of 4. We use
3268 the least significant bit to record whether we have
3269 already generated the necessary reloc. */
3274 bfd_put_32 (output_bfd
, relocation
,
3275 htab
->elf
.sgot
->contents
+ off
);
3280 Elf_Internal_Rela outrel
;
3283 s
= htab
->elf
.srelgot
;
3287 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3288 + htab
->elf
.sgot
->output_offset
3290 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3292 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3293 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3296 local_got_offsets
[r_symndx
] |= 1;
3300 if (off
>= (bfd_vma
) -2)
3303 relocation
= htab
->elf
.sgot
->output_section
->vma
3304 + htab
->elf
.sgot
->output_offset
+ off
3305 - htab
->elf
.sgotplt
->output_section
->vma
3306 - htab
->elf
.sgotplt
->output_offset
;
3310 /* Relocation is relative to the start of the global offset
3313 /* Check to make sure it isn't a protected function symbol
3314 for shared library since it may not be local when used
3315 as function address. We also need to make sure that a
3316 symbol is defined locally. */
3317 if (info
->shared
&& h
)
3319 if (!h
->def_regular
)
3323 switch (ELF_ST_VISIBILITY (h
->other
))
3326 v
= _("hidden symbol");
3329 v
= _("internal symbol");
3332 v
= _("protected symbol");
3339 (*_bfd_error_handler
)
3340 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3341 input_bfd
, v
, h
->root
.root
.string
);
3342 bfd_set_error (bfd_error_bad_value
);
3345 else if (!info
->executable
3346 && h
->type
== STT_FUNC
3347 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3349 (*_bfd_error_handler
)
3350 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3351 input_bfd
, h
->root
.root
.string
);
3352 bfd_set_error (bfd_error_bad_value
);
3357 /* Note that sgot is not involved in this
3358 calculation. We always want the start of .got.plt. If we
3359 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3360 permitted by the ABI, we might have to change this
3362 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3363 + htab
->elf
.sgotplt
->output_offset
;
3367 /* Use global offset table as symbol value. */
3368 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3369 + htab
->elf
.sgotplt
->output_offset
;
3370 unresolved_reloc
= FALSE
;
3374 /* Relocation is to the entry for this symbol in the
3375 procedure linkage table. */
3377 /* Resolve a PLT32 reloc against a local symbol directly,
3378 without using the procedure linkage table. */
3382 if (h
->plt
.offset
== (bfd_vma
) -1
3383 || htab
->elf
.splt
== NULL
)
3385 /* We didn't make a PLT entry for this symbol. This
3386 happens when statically linking PIC code, or when
3387 using -Bsymbolic. */
3391 relocation
= (htab
->elf
.splt
->output_section
->vma
3392 + htab
->elf
.splt
->output_offset
3394 unresolved_reloc
= FALSE
;
3399 if ((input_section
->flags
& SEC_ALLOC
) == 0
3405 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3406 || h
->root
.type
!= bfd_link_hash_undefweak
)
3407 && (r_type
!= R_386_PC32
3408 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3409 || (ELIMINATE_COPY_RELOCS
3416 || h
->root
.type
== bfd_link_hash_undefweak
3417 || h
->root
.type
== bfd_link_hash_undefined
)))
3419 Elf_Internal_Rela outrel
;
3421 bfd_boolean skip
, relocate
;
3424 /* When generating a shared object, these relocations
3425 are copied into the output file to be resolved at run
3432 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3434 if (outrel
.r_offset
== (bfd_vma
) -1)
3436 else if (outrel
.r_offset
== (bfd_vma
) -2)
3437 skip
= TRUE
, relocate
= TRUE
;
3438 outrel
.r_offset
+= (input_section
->output_section
->vma
3439 + input_section
->output_offset
);
3442 memset (&outrel
, 0, sizeof outrel
);
3445 && (r_type
== R_386_PC32
3447 || !SYMBOLIC_BIND (info
, h
)
3448 || !h
->def_regular
))
3449 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3452 /* This symbol is local, or marked to become local. */
3454 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3457 sreloc
= elf_section_data (input_section
)->sreloc
;
3459 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3461 r
= bfd_reloc_notsupported
;
3462 goto check_relocation_error
;
3465 loc
= sreloc
->contents
;
3466 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3468 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3470 /* If this reloc is against an external symbol, we do
3471 not want to fiddle with the addend. Otherwise, we
3472 need to include the symbol value so that it becomes
3473 an addend for the dynamic reloc. */
3480 if (!info
->executable
)
3482 Elf_Internal_Rela outrel
;
3486 outrel
.r_offset
= rel
->r_offset
3487 + input_section
->output_section
->vma
3488 + input_section
->output_offset
;
3489 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3490 sreloc
= elf_section_data (input_section
)->sreloc
;
3493 loc
= sreloc
->contents
;
3494 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3495 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3500 case R_386_TLS_GOTDESC
:
3501 case R_386_TLS_DESC_CALL
:
3502 case R_386_TLS_IE_32
:
3503 case R_386_TLS_GOTIE
:
3504 tls_type
= GOT_UNKNOWN
;
3505 if (h
== NULL
&& local_got_offsets
)
3506 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3508 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3509 if (tls_type
== GOT_TLS_IE
)
3510 tls_type
= GOT_TLS_IE_NEG
;
3512 if (! elf_i386_tls_transition (info
, input_bfd
,
3513 input_section
, contents
,
3514 symtab_hdr
, sym_hashes
,
3515 &r_type
, tls_type
, rel
,
3516 relend
, h
, r_symndx
))
3519 if (r_type
== R_386_TLS_LE_32
)
3521 BFD_ASSERT (! unresolved_reloc
);
3522 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3527 /* GD->LE transition. */
3528 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3531 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3533 movl %gs:0, %eax; subl $foo@tpoff, %eax
3534 (6 byte form of subl). */
3535 memcpy (contents
+ rel
->r_offset
- 3,
3536 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3537 roff
= rel
->r_offset
+ 5;
3541 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3543 movl %gs:0, %eax; subl $foo@tpoff, %eax
3544 (6 byte form of subl). */
3545 memcpy (contents
+ rel
->r_offset
- 2,
3546 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3547 roff
= rel
->r_offset
+ 6;
3549 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3551 /* Skip R_386_PC32/R_386_PLT32. */
3555 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3557 /* GDesc -> LE transition.
3558 It's originally something like:
3559 leal x@tlsdesc(%ebx), %eax
3563 Registers other than %eax may be set up here. */
3568 roff
= rel
->r_offset
;
3569 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3571 /* Now modify the instruction as appropriate. */
3572 /* aoliva FIXME: remove the above and xor the byte
3574 bfd_put_8 (output_bfd
, val
^ 0x86,
3575 contents
+ roff
- 1);
3576 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3580 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3582 /* GDesc -> LE transition.
3590 roff
= rel
->r_offset
;
3591 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3592 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3595 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3599 /* IE->LE transition:
3600 Originally it can be one of:
3608 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3611 /* movl foo, %eax. */
3612 bfd_put_8 (output_bfd
, 0xb8,
3613 contents
+ rel
->r_offset
- 1);
3619 type
= bfd_get_8 (input_bfd
,
3620 contents
+ rel
->r_offset
- 2);
3625 bfd_put_8 (output_bfd
, 0xc7,
3626 contents
+ rel
->r_offset
- 2);
3627 bfd_put_8 (output_bfd
,
3628 0xc0 | ((val
>> 3) & 7),
3629 contents
+ rel
->r_offset
- 1);
3633 bfd_put_8 (output_bfd
, 0x81,
3634 contents
+ rel
->r_offset
- 2);
3635 bfd_put_8 (output_bfd
,
3636 0xc0 | ((val
>> 3) & 7),
3637 contents
+ rel
->r_offset
- 1);
3644 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3645 contents
+ rel
->r_offset
);
3650 unsigned int val
, type
;
3652 /* {IE_32,GOTIE}->LE transition:
3653 Originally it can be one of:
3654 subl foo(%reg1), %reg2
3655 movl foo(%reg1), %reg2
3656 addl foo(%reg1), %reg2
3659 movl $foo, %reg2 (6 byte form)
3660 addl $foo, %reg2. */
3661 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3662 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3666 bfd_put_8 (output_bfd
, 0xc7,
3667 contents
+ rel
->r_offset
- 2);
3668 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3669 contents
+ rel
->r_offset
- 1);
3671 else if (type
== 0x2b)
3674 bfd_put_8 (output_bfd
, 0x81,
3675 contents
+ rel
->r_offset
- 2);
3676 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3677 contents
+ rel
->r_offset
- 1);
3679 else if (type
== 0x03)
3682 bfd_put_8 (output_bfd
, 0x81,
3683 contents
+ rel
->r_offset
- 2);
3684 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3685 contents
+ rel
->r_offset
- 1);
3689 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3690 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3691 contents
+ rel
->r_offset
);
3693 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3694 contents
+ rel
->r_offset
);
3699 if (htab
->elf
.sgot
== NULL
)
3704 off
= h
->got
.offset
;
3705 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3709 if (local_got_offsets
== NULL
)
3712 off
= local_got_offsets
[r_symndx
];
3713 offplt
= local_tlsdesc_gotents
[r_symndx
];
3720 Elf_Internal_Rela outrel
;
3725 if (htab
->elf
.srelgot
== NULL
)
3728 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3730 if (GOT_TLS_GDESC_P (tls_type
))
3732 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3733 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3734 <= htab
->elf
.sgotplt
->size
);
3735 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3736 + htab
->elf
.sgotplt
->output_offset
3738 + htab
->sgotplt_jump_table_size
);
3739 sreloc
= htab
->elf
.srelplt
;
3740 loc
= sreloc
->contents
;
3741 loc
+= (htab
->next_tls_desc_index
++
3742 * sizeof (Elf32_External_Rel
));
3743 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3744 <= sreloc
->contents
+ sreloc
->size
);
3745 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3748 BFD_ASSERT (! unresolved_reloc
);
3749 bfd_put_32 (output_bfd
,
3750 relocation
- elf_i386_dtpoff_base (info
),
3751 htab
->elf
.sgotplt
->contents
+ offplt
3752 + htab
->sgotplt_jump_table_size
+ 4);
3756 bfd_put_32 (output_bfd
, 0,
3757 htab
->elf
.sgotplt
->contents
+ offplt
3758 + htab
->sgotplt_jump_table_size
+ 4);
3762 sreloc
= htab
->elf
.srelgot
;
3764 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3765 + htab
->elf
.sgot
->output_offset
+ off
);
3767 if (GOT_TLS_GD_P (tls_type
))
3768 dr_type
= R_386_TLS_DTPMOD32
;
3769 else if (GOT_TLS_GDESC_P (tls_type
))
3771 else if (tls_type
== GOT_TLS_IE_POS
)
3772 dr_type
= R_386_TLS_TPOFF
;
3774 dr_type
= R_386_TLS_TPOFF32
;
3776 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3777 bfd_put_32 (output_bfd
,
3778 relocation
- elf_i386_dtpoff_base (info
),
3779 htab
->elf
.sgot
->contents
+ off
);
3780 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3781 bfd_put_32 (output_bfd
,
3782 elf_i386_dtpoff_base (info
) - relocation
,
3783 htab
->elf
.sgot
->contents
+ off
);
3784 else if (dr_type
!= R_386_TLS_DESC
)
3785 bfd_put_32 (output_bfd
, 0,
3786 htab
->elf
.sgot
->contents
+ off
);
3787 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3789 loc
= sreloc
->contents
;
3790 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3791 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3792 <= sreloc
->contents
+ sreloc
->size
);
3793 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3795 if (GOT_TLS_GD_P (tls_type
))
3799 BFD_ASSERT (! unresolved_reloc
);
3800 bfd_put_32 (output_bfd
,
3801 relocation
- elf_i386_dtpoff_base (info
),
3802 htab
->elf
.sgot
->contents
+ off
+ 4);
3806 bfd_put_32 (output_bfd
, 0,
3807 htab
->elf
.sgot
->contents
+ off
+ 4);
3808 outrel
.r_info
= ELF32_R_INFO (indx
,
3809 R_386_TLS_DTPOFF32
);
3810 outrel
.r_offset
+= 4;
3811 sreloc
->reloc_count
++;
3812 loc
+= sizeof (Elf32_External_Rel
);
3813 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3814 <= sreloc
->contents
+ sreloc
->size
);
3815 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3818 else if (tls_type
== GOT_TLS_IE_BOTH
)
3820 bfd_put_32 (output_bfd
,
3822 ? relocation
- elf_i386_dtpoff_base (info
)
3824 htab
->elf
.sgot
->contents
+ off
+ 4);
3825 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3826 outrel
.r_offset
+= 4;
3827 sreloc
->reloc_count
++;
3828 loc
+= sizeof (Elf32_External_Rel
);
3829 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3836 local_got_offsets
[r_symndx
] |= 1;
3839 if (off
>= (bfd_vma
) -2
3840 && ! GOT_TLS_GDESC_P (tls_type
))
3842 if (r_type
== R_386_TLS_GOTDESC
3843 || r_type
== R_386_TLS_DESC_CALL
)
3845 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3846 unresolved_reloc
= FALSE
;
3848 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3850 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3851 + htab
->elf
.sgotplt
->output_offset
;
3852 relocation
= htab
->elf
.sgot
->output_section
->vma
3853 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3854 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3855 && tls_type
== GOT_TLS_IE_BOTH
)
3857 if (r_type
== R_386_TLS_IE
)
3858 relocation
+= g_o_t
;
3859 unresolved_reloc
= FALSE
;
3861 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3863 unsigned int val
, type
;
3866 /* GD->IE transition. */
3867 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3868 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3871 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3873 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3875 roff
= rel
->r_offset
- 3;
3879 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3881 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3882 roff
= rel
->r_offset
- 2;
3884 memcpy (contents
+ roff
,
3885 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3886 contents
[roff
+ 7] = 0x80 | (val
& 7);
3887 /* If foo is used only with foo@gotntpoff(%reg) and
3888 foo@indntpoff, but not with foo@gottpoff(%reg), change
3889 subl $foo@gottpoff(%reg), %eax
3891 addl $foo@gotntpoff(%reg), %eax. */
3892 if (tls_type
== GOT_TLS_IE_POS
)
3893 contents
[roff
+ 6] = 0x03;
3894 bfd_put_32 (output_bfd
,
3895 htab
->elf
.sgot
->output_section
->vma
3896 + htab
->elf
.sgot
->output_offset
+ off
3897 - htab
->elf
.sgotplt
->output_section
->vma
3898 - htab
->elf
.sgotplt
->output_offset
,
3899 contents
+ roff
+ 8);
3900 /* Skip R_386_PLT32. */
3904 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3906 /* GDesc -> IE transition.
3907 It's originally something like:
3908 leal x@tlsdesc(%ebx), %eax
3911 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3913 movl x@gottpoff(%ebx), %eax # before negl %eax
3915 Registers other than %eax may be set up here. */
3919 /* First, make sure it's a leal adding ebx to a 32-bit
3920 offset into any register, although it's probably
3921 almost always going to be eax. */
3922 roff
= rel
->r_offset
;
3924 /* Now modify the instruction as appropriate. */
3925 /* To turn a leal into a movl in the form we use it, it
3926 suffices to change the first byte from 0x8d to 0x8b.
3927 aoliva FIXME: should we decide to keep the leal, all
3928 we have to do is remove the statement below, and
3929 adjust the relaxation of R_386_TLS_DESC_CALL. */
3930 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3932 if (tls_type
== GOT_TLS_IE_BOTH
)
3935 bfd_put_32 (output_bfd
,
3936 htab
->elf
.sgot
->output_section
->vma
3937 + htab
->elf
.sgot
->output_offset
+ off
3938 - htab
->elf
.sgotplt
->output_section
->vma
3939 - htab
->elf
.sgotplt
->output_offset
,
3943 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3945 /* GDesc -> IE transition.
3953 depending on how we transformed the TLS_GOTDESC above.
3958 roff
= rel
->r_offset
;
3960 /* Now modify the instruction as appropriate. */
3961 if (tls_type
!= GOT_TLS_IE_NEG
)
3964 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3965 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3970 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3971 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3981 if (! elf_i386_tls_transition (info
, input_bfd
,
3982 input_section
, contents
,
3983 symtab_hdr
, sym_hashes
,
3984 &r_type
, GOT_UNKNOWN
, rel
,
3985 relend
, h
, r_symndx
))
3988 if (r_type
!= R_386_TLS_LDM
)
3990 /* LD->LE transition:
3991 leal foo(%reg), %eax; call ___tls_get_addr.
3993 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3994 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3995 memcpy (contents
+ rel
->r_offset
- 2,
3996 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3997 /* Skip R_386_PC32/R_386_PLT32. */
4002 if (htab
->elf
.sgot
== NULL
)
4005 off
= htab
->tls_ldm_got
.offset
;
4010 Elf_Internal_Rela outrel
;
4013 if (htab
->elf
.srelgot
== NULL
)
4016 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4017 + htab
->elf
.sgot
->output_offset
+ off
);
4019 bfd_put_32 (output_bfd
, 0,
4020 htab
->elf
.sgot
->contents
+ off
);
4021 bfd_put_32 (output_bfd
, 0,
4022 htab
->elf
.sgot
->contents
+ off
+ 4);
4023 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4024 loc
= htab
->elf
.srelgot
->contents
;
4025 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4026 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4027 htab
->tls_ldm_got
.offset
|= 1;
4029 relocation
= htab
->elf
.sgot
->output_section
->vma
4030 + htab
->elf
.sgot
->output_offset
+ off
4031 - htab
->elf
.sgotplt
->output_section
->vma
4032 - htab
->elf
.sgotplt
->output_offset
;
4033 unresolved_reloc
= FALSE
;
4036 case R_386_TLS_LDO_32
:
4037 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4038 relocation
-= elf_i386_dtpoff_base (info
);
4040 /* When converting LDO to LE, we must negate. */
4041 relocation
= -elf_i386_tpoff (info
, relocation
);
4044 case R_386_TLS_LE_32
:
4046 if (!info
->executable
)
4048 Elf_Internal_Rela outrel
;
4052 outrel
.r_offset
= rel
->r_offset
4053 + input_section
->output_section
->vma
4054 + input_section
->output_offset
;
4055 if (h
!= NULL
&& h
->dynindx
!= -1)
4059 if (r_type
== R_386_TLS_LE_32
)
4060 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4062 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4063 sreloc
= elf_section_data (input_section
)->sreloc
;
4066 loc
= sreloc
->contents
;
4067 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4068 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4071 else if (r_type
== R_386_TLS_LE_32
)
4072 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4074 relocation
-= elf_i386_dtpoff_base (info
);
4076 else if (r_type
== R_386_TLS_LE_32
)
4077 relocation
= elf_i386_tpoff (info
, relocation
);
4079 relocation
= -elf_i386_tpoff (info
, relocation
);
4086 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4087 because such sections are not SEC_ALLOC and thus ld.so will
4088 not process them. */
4089 if (unresolved_reloc
4090 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4093 (*_bfd_error_handler
)
4094 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4097 (long) rel
->r_offset
,
4099 h
->root
.root
.string
);
4104 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4105 contents
, rel
->r_offset
,
4108 check_relocation_error
:
4109 if (r
!= bfd_reloc_ok
)
4114 name
= h
->root
.root
.string
;
4117 name
= bfd_elf_string_from_elf_section (input_bfd
,
4118 symtab_hdr
->sh_link
,
4123 name
= bfd_section_name (input_bfd
, sec
);
4126 if (r
== bfd_reloc_overflow
)
4128 if (! ((*info
->callbacks
->reloc_overflow
)
4129 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4130 (bfd_vma
) 0, input_bfd
, input_section
,
4136 (*_bfd_error_handler
)
4137 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4138 input_bfd
, input_section
,
4139 (long) rel
->r_offset
, name
, (int) r
);
4148 /* Finish up dynamic symbol handling. We set the contents of various
4149 dynamic sections here. */
4152 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4153 struct bfd_link_info
*info
,
4154 struct elf_link_hash_entry
*h
,
4155 Elf_Internal_Sym
*sym
)
4157 struct elf_i386_link_hash_table
*htab
;
4159 htab
= elf_i386_hash_table (info
);
4163 if (h
->plt
.offset
!= (bfd_vma
) -1)
4167 Elf_Internal_Rela rel
;
4169 asection
*plt
, *gotplt
, *relplt
;
4171 /* When building a static executable, use .iplt, .igot.plt and
4172 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4173 if (htab
->elf
.splt
!= NULL
)
4175 plt
= htab
->elf
.splt
;
4176 gotplt
= htab
->elf
.sgotplt
;
4177 relplt
= htab
->elf
.srelplt
;
4181 plt
= htab
->elf
.iplt
;
4182 gotplt
= htab
->elf
.igotplt
;
4183 relplt
= htab
->elf
.irelplt
;
4186 /* This symbol has an entry in the procedure linkage table. Set
4189 if ((h
->dynindx
== -1
4190 && !((h
->forced_local
|| info
->executable
)
4192 && h
->type
== STT_GNU_IFUNC
))
4198 /* Get the index in the procedure linkage table which
4199 corresponds to this symbol. This is the index of this symbol
4200 in all the symbols for which we are making plt entries. The
4201 first entry in the procedure linkage table is reserved.
4203 Get the offset into the .got table of the entry that
4204 corresponds to this function. Each .got entry is 4 bytes.
4205 The first three are reserved.
4207 For static executables, we don't reserve anything. */
4209 if (plt
== htab
->elf
.splt
)
4211 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
4212 got_offset
= (plt_index
+ 3) * 4;
4216 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4217 got_offset
= plt_index
* 4;
4220 /* Fill in the entry in the procedure linkage table. */
4223 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4225 bfd_put_32 (output_bfd
,
4226 (gotplt
->output_section
->vma
4227 + gotplt
->output_offset
4229 plt
->contents
+ h
->plt
.offset
+ 2);
4231 if (htab
->is_vxworks
)
4233 int s
, k
, reloc_index
;
4235 /* Create the R_386_32 relocation referencing the GOT
4236 for this PLT entry. */
4238 /* S: Current slot number (zero-based). */
4239 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4240 /* K: Number of relocations for PLTResolve. */
4242 k
= PLTRESOLVE_RELOCS_SHLIB
;
4244 k
= PLTRESOLVE_RELOCS
;
4245 /* Skip the PLTresolve relocations, and the relocations for
4246 the other PLT slots. */
4247 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4248 loc
= (htab
->srelplt2
->contents
+ reloc_index
4249 * sizeof (Elf32_External_Rel
));
4251 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4252 + htab
->elf
.splt
->output_offset
4253 + h
->plt
.offset
+ 2),
4254 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4255 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4257 /* Create the R_386_32 relocation referencing the beginning of
4258 the PLT for this GOT entry. */
4259 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4260 + htab
->elf
.sgotplt
->output_offset
4262 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4263 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4264 loc
+ sizeof (Elf32_External_Rel
));
4269 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4271 bfd_put_32 (output_bfd
, got_offset
,
4272 plt
->contents
+ h
->plt
.offset
+ 2);
4275 /* Don't fill PLT entry for static executables. */
4276 if (plt
== htab
->elf
.splt
)
4278 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4279 plt
->contents
+ h
->plt
.offset
+ 7);
4280 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4281 plt
->contents
+ h
->plt
.offset
+ 12);
4284 /* Fill in the entry in the global offset table. */
4285 bfd_put_32 (output_bfd
,
4286 (plt
->output_section
->vma
4287 + plt
->output_offset
4290 gotplt
->contents
+ got_offset
);
4292 /* Fill in the entry in the .rel.plt section. */
4293 rel
.r_offset
= (gotplt
->output_section
->vma
4294 + gotplt
->output_offset
4296 if (h
->dynindx
== -1
4297 || ((info
->executable
4298 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4300 && h
->type
== STT_GNU_IFUNC
))
4302 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4303 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4304 in the .got.plt section. */
4305 bfd_put_32 (output_bfd
,
4306 (h
->root
.u
.def
.value
4307 + h
->root
.u
.def
.section
->output_section
->vma
4308 + h
->root
.u
.def
.section
->output_offset
),
4309 gotplt
->contents
+ got_offset
);
4310 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4313 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4314 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4315 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4317 if (!h
->def_regular
)
4319 /* Mark the symbol as undefined, rather than as defined in
4320 the .plt section. Leave the value if there were any
4321 relocations where pointer equality matters (this is a clue
4322 for the dynamic linker, to make function pointer
4323 comparisons work between an application and shared
4324 library), otherwise set it to zero. If a function is only
4325 called from a binary, there is no need to slow down
4326 shared libraries because of that. */
4327 sym
->st_shndx
= SHN_UNDEF
;
4328 if (!h
->pointer_equality_needed
)
4333 if (h
->got
.offset
!= (bfd_vma
) -1
4334 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4335 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4337 Elf_Internal_Rela rel
;
4340 /* This symbol has an entry in the global offset table. Set it
4343 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4346 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4347 + htab
->elf
.sgot
->output_offset
4348 + (h
->got
.offset
& ~(bfd_vma
) 1));
4350 /* If this is a static link, or it is a -Bsymbolic link and the
4351 symbol is defined locally or was forced to be local because
4352 of a version file, we just want to emit a RELATIVE reloc.
4353 The entry in the global offset table will already have been
4354 initialized in the relocate_section function. */
4356 && h
->type
== STT_GNU_IFUNC
)
4360 /* Generate R_386_GLOB_DAT. */
4367 if (!h
->pointer_equality_needed
)
4370 /* For non-shared object, we can't use .got.plt, which
4371 contains the real function addres if we need pointer
4372 equality. We load the GOT entry with the PLT entry. */
4373 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4374 bfd_put_32 (output_bfd
,
4375 (plt
->output_section
->vma
4376 + plt
->output_offset
+ h
->plt
.offset
),
4377 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4381 else if (info
->shared
4382 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4384 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4385 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4389 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4391 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4392 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4393 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4396 loc
= htab
->elf
.srelgot
->contents
;
4397 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4398 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4403 Elf_Internal_Rela rel
;
4406 /* This symbol needs a copy reloc. Set it up. */
4408 if (h
->dynindx
== -1
4409 || (h
->root
.type
!= bfd_link_hash_defined
4410 && h
->root
.type
!= bfd_link_hash_defweak
)
4411 || htab
->srelbss
== NULL
)
4414 rel
.r_offset
= (h
->root
.u
.def
.value
4415 + h
->root
.u
.def
.section
->output_section
->vma
4416 + h
->root
.u
.def
.section
->output_offset
);
4417 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4418 loc
= htab
->srelbss
->contents
;
4419 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4420 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4423 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4424 be NULL for local symbols.
4426 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4427 is relative to the ".got" section. */
4429 && (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4430 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
)))
4431 sym
->st_shndx
= SHN_ABS
;
4436 /* Finish up local dynamic symbol handling. We set the contents of
4437 various dynamic sections here. */
4440 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4442 struct elf_link_hash_entry
*h
4443 = (struct elf_link_hash_entry
*) *slot
;
4444 struct bfd_link_info
*info
4445 = (struct bfd_link_info
*) inf
;
4447 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4451 /* Used to decide how to sort relocs in an optimal manner for the
4452 dynamic linker, before writing them out. */
4454 static enum elf_reloc_type_class
4455 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4457 switch (ELF32_R_TYPE (rela
->r_info
))
4459 case R_386_RELATIVE
:
4460 return reloc_class_relative
;
4461 case R_386_JUMP_SLOT
:
4462 return reloc_class_plt
;
4464 return reloc_class_copy
;
4466 return reloc_class_normal
;
4470 /* Finish up the dynamic sections. */
4473 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4474 struct bfd_link_info
*info
)
4476 struct elf_i386_link_hash_table
*htab
;
4480 htab
= elf_i386_hash_table (info
);
4484 dynobj
= htab
->elf
.dynobj
;
4485 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4487 if (htab
->elf
.dynamic_sections_created
)
4489 Elf32_External_Dyn
*dyncon
, *dynconend
;
4491 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4494 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4495 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4496 for (; dyncon
< dynconend
; dyncon
++)
4498 Elf_Internal_Dyn dyn
;
4501 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4506 if (htab
->is_vxworks
4507 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4512 s
= htab
->elf
.sgotplt
;
4513 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4517 s
= htab
->elf
.srelplt
;
4518 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4522 s
= htab
->elf
.srelplt
;
4523 dyn
.d_un
.d_val
= s
->size
;
4527 /* My reading of the SVR4 ABI indicates that the
4528 procedure linkage table relocs (DT_JMPREL) should be
4529 included in the overall relocs (DT_REL). This is
4530 what Solaris does. However, UnixWare can not handle
4531 that case. Therefore, we override the DT_RELSZ entry
4532 here to make it not include the JMPREL relocs. */
4533 s
= htab
->elf
.srelplt
;
4536 dyn
.d_un
.d_val
-= s
->size
;
4540 /* We may not be using the standard ELF linker script.
4541 If .rel.plt is the first .rel section, we adjust
4542 DT_REL to not include it. */
4543 s
= htab
->elf
.srelplt
;
4546 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4548 dyn
.d_un
.d_ptr
+= s
->size
;
4552 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4555 /* Fill in the first entry in the procedure linkage table. */
4556 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4560 memcpy (htab
->elf
.splt
->contents
, elf_i386_pic_plt0_entry
,
4561 sizeof (elf_i386_pic_plt0_entry
));
4562 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4563 htab
->plt0_pad_byte
,
4564 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4568 memcpy (htab
->elf
.splt
->contents
, elf_i386_plt0_entry
,
4569 sizeof(elf_i386_plt0_entry
));
4570 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4571 htab
->plt0_pad_byte
,
4572 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4573 bfd_put_32 (output_bfd
,
4574 (htab
->elf
.sgotplt
->output_section
->vma
4575 + htab
->elf
.sgotplt
->output_offset
4577 htab
->elf
.splt
->contents
+ 2);
4578 bfd_put_32 (output_bfd
,
4579 (htab
->elf
.sgotplt
->output_section
->vma
4580 + htab
->elf
.sgotplt
->output_offset
4582 htab
->elf
.splt
->contents
+ 8);
4584 if (htab
->is_vxworks
)
4586 Elf_Internal_Rela rel
;
4588 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4589 On IA32 we use REL relocations so the addend goes in
4590 the PLT directly. */
4591 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4592 + htab
->elf
.splt
->output_offset
4594 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4595 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4596 htab
->srelplt2
->contents
);
4597 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4598 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4599 + htab
->elf
.splt
->output_offset
4601 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4602 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4603 htab
->srelplt2
->contents
+
4604 sizeof (Elf32_External_Rel
));
4608 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4609 really seem like the right value. */
4610 elf_section_data (htab
->elf
.splt
->output_section
)
4611 ->this_hdr
.sh_entsize
= 4;
4613 /* Correct the .rel.plt.unloaded relocations. */
4614 if (htab
->is_vxworks
&& !info
->shared
)
4616 int num_plts
= (htab
->elf
.splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4619 p
= htab
->srelplt2
->contents
;
4621 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4623 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4625 for (; num_plts
; num_plts
--)
4627 Elf_Internal_Rela rel
;
4628 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4629 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4630 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4631 p
+= sizeof (Elf32_External_Rel
);
4633 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4634 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4635 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4636 p
+= sizeof (Elf32_External_Rel
);
4642 if (htab
->elf
.sgotplt
)
4644 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4646 (*_bfd_error_handler
)
4647 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4651 /* Fill in the first three entries in the global offset table. */
4652 if (htab
->elf
.sgotplt
->size
> 0)
4654 bfd_put_32 (output_bfd
,
4656 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4657 htab
->elf
.sgotplt
->contents
);
4658 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4659 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4662 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4665 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4666 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4668 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4669 htab_traverse (htab
->loc_hash_table
,
4670 elf_i386_finish_local_dynamic_symbol
,
4676 /* Return address for Ith PLT stub in section PLT, for relocation REL
4677 or (bfd_vma) -1 if it should not be included. */
4680 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4681 const arelent
*rel ATTRIBUTE_UNUSED
)
4683 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4686 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4689 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4691 if (h
->plt
.offset
!= (bfd_vma
) -1
4693 && !h
->pointer_equality_needed
)
4696 return _bfd_elf_hash_symbol (h
);
4699 /* Hook called by the linker routine which adds symbols from an object
4703 elf_i386_add_symbol_hook (bfd
* abfd
,
4704 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4705 Elf_Internal_Sym
* sym
,
4706 const char ** namep ATTRIBUTE_UNUSED
,
4707 flagword
* flagsp ATTRIBUTE_UNUSED
,
4708 asection
** secp ATTRIBUTE_UNUSED
,
4709 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4711 if ((abfd
->flags
& DYNAMIC
) == 0
4712 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
4713 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
4714 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
4719 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4720 #define TARGET_LITTLE_NAME "elf32-i386"
4721 #define ELF_ARCH bfd_arch_i386
4722 #define ELF_TARGET_ID I386_ELF_DATA
4723 #define ELF_MACHINE_CODE EM_386
4724 #define ELF_MAXPAGESIZE 0x1000
4726 #define elf_backend_can_gc_sections 1
4727 #define elf_backend_can_refcount 1
4728 #define elf_backend_want_got_plt 1
4729 #define elf_backend_plt_readonly 1
4730 #define elf_backend_want_plt_sym 0
4731 #define elf_backend_got_header_size 12
4733 /* Support RELA for objdump of prelink objects. */
4734 #define elf_info_to_howto elf_i386_info_to_howto_rel
4735 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4737 #define bfd_elf32_mkobject elf_i386_mkobject
4739 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4740 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4741 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4742 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4743 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4745 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4746 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4747 #define elf_backend_check_relocs elf_i386_check_relocs
4748 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4749 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4750 #define elf_backend_fake_sections elf_i386_fake_sections
4751 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4752 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4753 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4754 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4755 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4756 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4757 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4758 #define elf_backend_relocate_section elf_i386_relocate_section
4759 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4760 #define elf_backend_always_size_sections elf_i386_always_size_sections
4761 #define elf_backend_omit_section_dynsym \
4762 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4763 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4764 #define elf_backend_hash_symbol elf_i386_hash_symbol
4765 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4766 #undef elf_backend_post_process_headers
4767 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4769 #include "elf32-target.h"
4771 /* FreeBSD support. */
4773 #undef TARGET_LITTLE_SYM
4774 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4775 #undef TARGET_LITTLE_NAME
4776 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4778 #define ELF_OSABI ELFOSABI_FREEBSD
4780 /* The kernel recognizes executables as valid only if they carry a
4781 "FreeBSD" label in the ELF header. So we put this label on all
4782 executables and (for simplicity) also all other object files. */
4785 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4787 _bfd_elf_set_osabi (abfd
, info
);
4789 #ifdef OLD_FREEBSD_ABI_LABEL
4790 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4791 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4795 #undef elf_backend_post_process_headers
4796 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4798 #define elf32_bed elf32_i386_fbsd_bed
4800 #undef elf_backend_add_symbol_hook
4802 #include "elf32-target.h"
4806 #undef TARGET_LITTLE_SYM
4807 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
4808 #undef TARGET_LITTLE_NAME
4809 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4811 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4812 objects won't be recognized. */
4816 #define elf32_bed elf32_i386_sol2_bed
4818 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4820 #undef elf_backend_static_tls_alignment
4821 #define elf_backend_static_tls_alignment 8
4823 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4825 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4827 #undef elf_backend_want_plt_sym
4828 #define elf_backend_want_plt_sym 1
4830 #include "elf32-target.h"
4832 /* VxWorks support. */
4834 #undef TARGET_LITTLE_SYM
4835 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4836 #undef TARGET_LITTLE_NAME
4837 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4840 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4842 static struct bfd_link_hash_table
*
4843 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4845 struct bfd_link_hash_table
*ret
;
4846 struct elf_i386_link_hash_table
*htab
;
4848 ret
= elf_i386_link_hash_table_create (abfd
);
4851 htab
= (struct elf_i386_link_hash_table
*) ret
;
4852 htab
->is_vxworks
= 1;
4853 htab
->plt0_pad_byte
= 0x90;
4860 #undef elf_backend_relocs_compatible
4861 #undef elf_backend_post_process_headers
4862 #undef bfd_elf32_bfd_link_hash_table_create
4863 #define bfd_elf32_bfd_link_hash_table_create \
4864 elf_i386_vxworks_link_hash_table_create
4865 #undef elf_backend_add_symbol_hook
4866 #define elf_backend_add_symbol_hook \
4867 elf_vxworks_add_symbol_hook
4868 #undef elf_backend_link_output_symbol_hook
4869 #define elf_backend_link_output_symbol_hook \
4870 elf_vxworks_link_output_symbol_hook
4871 #undef elf_backend_emit_relocs
4872 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4873 #undef elf_backend_final_write_processing
4874 #define elf_backend_final_write_processing \
4875 elf_vxworks_final_write_processing
4876 #undef elf_backend_static_tls_alignment
4878 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4880 #undef elf_backend_want_plt_sym
4881 #define elf_backend_want_plt_sym 1
4884 #define elf32_bed elf32_i386_vxworks_bed
4886 #include "elf32-target.h"