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 if (info
->warn_shared_textrel
&& info
->shared
)
2403 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2404 p
->sec
->owner
, h
->root
.root
.string
,
2407 /* Not an error, just cut short the traversal. */
2414 /* Set the sizes of the dynamic sections. */
2417 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2418 struct bfd_link_info
*info
)
2420 struct elf_i386_link_hash_table
*htab
;
2426 htab
= elf_i386_hash_table (info
);
2429 dynobj
= htab
->elf
.dynobj
;
2433 if (htab
->elf
.dynamic_sections_created
)
2435 /* Set the contents of the .interp section to the interpreter. */
2436 if (info
->executable
)
2438 s
= bfd_get_section_by_name (dynobj
, ".interp");
2441 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2442 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2446 /* Set up .got offsets for local syms, and space for local dynamic
2448 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2450 bfd_signed_vma
*local_got
;
2451 bfd_signed_vma
*end_local_got
;
2452 char *local_tls_type
;
2453 bfd_vma
*local_tlsdesc_gotent
;
2454 bfd_size_type locsymcount
;
2455 Elf_Internal_Shdr
*symtab_hdr
;
2458 if (! is_i386_elf (ibfd
))
2461 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2463 struct elf_dyn_relocs
*p
;
2465 for (p
= ((struct elf_dyn_relocs
*)
2466 elf_section_data (s
)->local_dynrel
);
2470 if (!bfd_is_abs_section (p
->sec
)
2471 && bfd_is_abs_section (p
->sec
->output_section
))
2473 /* Input section has been discarded, either because
2474 it is a copy of a linkonce section or due to
2475 linker script /DISCARD/, so we'll be discarding
2478 else if (htab
->is_vxworks
2479 && strcmp (p
->sec
->output_section
->name
,
2482 /* Relocations in vxworks .tls_vars sections are
2483 handled specially by the loader. */
2485 else if (p
->count
!= 0)
2487 srel
= elf_section_data (p
->sec
)->sreloc
;
2488 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2489 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2491 info
->flags
|= DF_TEXTREL
;
2492 if (info
->warn_shared_textrel
&& info
->shared
)
2493 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2494 p
->sec
->owner
, p
->sec
);
2501 local_got
= elf_local_got_refcounts (ibfd
);
2505 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2506 locsymcount
= symtab_hdr
->sh_info
;
2507 end_local_got
= local_got
+ locsymcount
;
2508 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2509 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2511 srel
= htab
->elf
.srelgot
;
2512 for (; local_got
< end_local_got
;
2513 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2515 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2518 if (GOT_TLS_GDESC_P (*local_tls_type
))
2520 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2521 - elf_i386_compute_jump_table_size (htab
);
2522 htab
->elf
.sgotplt
->size
+= 8;
2523 *local_got
= (bfd_vma
) -2;
2525 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2526 || GOT_TLS_GD_P (*local_tls_type
))
2528 *local_got
= s
->size
;
2530 if (GOT_TLS_GD_P (*local_tls_type
)
2531 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2535 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2536 || (*local_tls_type
& GOT_TLS_IE
))
2538 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2539 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2540 else if (GOT_TLS_GD_P (*local_tls_type
)
2541 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2542 srel
->size
+= sizeof (Elf32_External_Rel
);
2543 if (GOT_TLS_GDESC_P (*local_tls_type
))
2544 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2548 *local_got
= (bfd_vma
) -1;
2552 if (htab
->tls_ldm_got
.refcount
> 0)
2554 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2556 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2557 htab
->elf
.sgot
->size
+= 8;
2558 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2561 htab
->tls_ldm_got
.offset
= -1;
2563 /* Allocate global sym .plt and .got entries, and space for global
2564 sym dynamic relocs. */
2565 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2567 /* Allocate .plt and .got entries, and space for local symbols. */
2568 htab_traverse (htab
->loc_hash_table
,
2569 elf_i386_allocate_local_dynrelocs
,
2572 /* For every jump slot reserved in the sgotplt, reloc_count is
2573 incremented. However, when we reserve space for TLS descriptors,
2574 it's not incremented, so in order to compute the space reserved
2575 for them, it suffices to multiply the reloc count by the jump
2577 if (htab
->elf
.srelplt
)
2578 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2580 if (htab
->elf
.sgotplt
)
2582 struct elf_link_hash_entry
*got
;
2583 got
= elf_link_hash_lookup (elf_hash_table (info
),
2584 "_GLOBAL_OFFSET_TABLE_",
2585 FALSE
, FALSE
, FALSE
);
2587 /* Don't allocate .got.plt section if there are no GOT nor PLT
2588 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2590 || !got
->ref_regular_nonweak
)
2591 && (htab
->elf
.sgotplt
->size
2592 == get_elf_backend_data (output_bfd
)->got_header_size
)
2593 && (htab
->elf
.splt
== NULL
2594 || htab
->elf
.splt
->size
== 0)
2595 && (htab
->elf
.sgot
== NULL
2596 || htab
->elf
.sgot
->size
== 0)
2597 && (htab
->elf
.iplt
== NULL
2598 || htab
->elf
.iplt
->size
== 0)
2599 && (htab
->elf
.igotplt
== NULL
2600 || htab
->elf
.igotplt
->size
== 0))
2601 htab
->elf
.sgotplt
->size
= 0;
2604 /* We now have determined the sizes of the various dynamic sections.
2605 Allocate memory for them. */
2607 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2609 bfd_boolean strip_section
= TRUE
;
2611 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2614 if (s
== htab
->elf
.splt
2615 || s
== htab
->elf
.sgot
2616 || s
== htab
->elf
.sgotplt
2617 || s
== htab
->elf
.iplt
2618 || s
== htab
->elf
.igotplt
2619 || s
== htab
->sdynbss
)
2621 /* Strip this section if we don't need it; see the
2623 /* We'd like to strip these sections if they aren't needed, but if
2624 we've exported dynamic symbols from them we must leave them.
2625 It's too late to tell BFD to get rid of the symbols. */
2627 if (htab
->elf
.hplt
!= NULL
)
2628 strip_section
= FALSE
;
2630 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2633 && s
!= htab
->elf
.srelplt
2634 && s
!= htab
->srelplt2
)
2637 /* We use the reloc_count field as a counter if we need
2638 to copy relocs into the output file. */
2643 /* It's not one of our sections, so don't allocate space. */
2649 /* If we don't need this section, strip it from the
2650 output file. This is mostly to handle .rel.bss and
2651 .rel.plt. We must create both sections in
2652 create_dynamic_sections, because they must be created
2653 before the linker maps input sections to output
2654 sections. The linker does that before
2655 adjust_dynamic_symbol is called, and it is that
2656 function which decides whether anything needs to go
2657 into these sections. */
2659 s
->flags
|= SEC_EXCLUDE
;
2663 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2666 /* Allocate memory for the section contents. We use bfd_zalloc
2667 here in case unused entries are not reclaimed before the
2668 section's contents are written out. This should not happen,
2669 but this way if it does, we get a R_386_NONE reloc instead
2671 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2672 if (s
->contents
== NULL
)
2676 if (htab
->elf
.dynamic_sections_created
)
2678 /* Add some entries to the .dynamic section. We fill in the
2679 values later, in elf_i386_finish_dynamic_sections, but we
2680 must add the entries now so that we get the correct size for
2681 the .dynamic section. The DT_DEBUG entry is filled in by the
2682 dynamic linker and used by the debugger. */
2683 #define add_dynamic_entry(TAG, VAL) \
2684 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2686 if (info
->executable
)
2688 if (!add_dynamic_entry (DT_DEBUG
, 0))
2692 if (htab
->elf
.splt
->size
!= 0)
2694 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2695 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2696 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2697 || !add_dynamic_entry (DT_JMPREL
, 0))
2703 if (!add_dynamic_entry (DT_REL
, 0)
2704 || !add_dynamic_entry (DT_RELSZ
, 0)
2705 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2708 /* If any dynamic relocs apply to a read-only section,
2709 then we need a DT_TEXTREL entry. */
2710 if ((info
->flags
& DF_TEXTREL
) == 0)
2711 elf_link_hash_traverse (&htab
->elf
,
2712 elf_i386_readonly_dynrelocs
, info
);
2714 if ((info
->flags
& DF_TEXTREL
) != 0)
2716 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2720 if (htab
->is_vxworks
2721 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2724 #undef add_dynamic_entry
2730 elf_i386_always_size_sections (bfd
*output_bfd
,
2731 struct bfd_link_info
*info
)
2733 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2737 struct elf_link_hash_entry
*tlsbase
;
2739 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2740 "_TLS_MODULE_BASE_",
2741 FALSE
, FALSE
, FALSE
);
2743 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2745 struct elf_i386_link_hash_table
*htab
;
2746 struct bfd_link_hash_entry
*bh
= NULL
;
2747 const struct elf_backend_data
*bed
2748 = get_elf_backend_data (output_bfd
);
2750 htab
= elf_i386_hash_table (info
);
2754 if (!(_bfd_generic_link_add_one_symbol
2755 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2756 tls_sec
, 0, NULL
, FALSE
,
2757 bed
->collect
, &bh
)))
2760 htab
->tls_module_base
= bh
;
2762 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2763 tlsbase
->def_regular
= 1;
2764 tlsbase
->other
= STV_HIDDEN
;
2765 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2772 /* Set the correct type for an x86 ELF section. We do this by the
2773 section name, which is a hack, but ought to work. */
2776 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2777 Elf_Internal_Shdr
*hdr
,
2782 name
= bfd_get_section_name (abfd
, sec
);
2784 /* This is an ugly, but unfortunately necessary hack that is
2785 needed when producing EFI binaries on x86. It tells
2786 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2787 containing ELF relocation info. We need this hack in order to
2788 be able to generate ELF binaries that can be translated into
2789 EFI applications (which are essentially COFF objects). Those
2790 files contain a COFF ".reloc" section inside an ELFNN object,
2791 which would normally cause BFD to segfault because it would
2792 attempt to interpret this section as containing relocation
2793 entries for section "oc". With this hack enabled, ".reloc"
2794 will be treated as a normal data section, which will avoid the
2795 segfault. However, you won't be able to create an ELFNN binary
2796 with a section named "oc" that needs relocations, but that's
2797 the kind of ugly side-effects you get when detecting section
2798 types based on their names... In practice, this limitation is
2799 unlikely to bite. */
2800 if (strcmp (name
, ".reloc") == 0)
2801 hdr
->sh_type
= SHT_PROGBITS
;
2806 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2807 executables. Rather than setting it to the beginning of the TLS
2808 section, we have to set it to the end. This function may be called
2809 multiple times, it is idempotent. */
2812 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2814 struct elf_i386_link_hash_table
*htab
;
2815 struct bfd_link_hash_entry
*base
;
2817 if (!info
->executable
)
2820 htab
= elf_i386_hash_table (info
);
2824 base
= htab
->tls_module_base
;
2828 base
->u
.def
.value
= htab
->elf
.tls_size
;
2831 /* Return the base VMA address which should be subtracted from real addresses
2832 when resolving @dtpoff relocation.
2833 This is PT_TLS segment p_vaddr. */
2836 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2838 /* If tls_sec is NULL, we should have signalled an error already. */
2839 if (elf_hash_table (info
)->tls_sec
== NULL
)
2841 return elf_hash_table (info
)->tls_sec
->vma
;
2844 /* Return the relocation value for @tpoff relocation
2845 if STT_TLS virtual address is ADDRESS. */
2848 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2850 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2851 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2852 bfd_vma static_tls_size
;
2854 /* If tls_sec is NULL, we should have signalled an error already. */
2855 if (htab
->tls_sec
== NULL
)
2858 /* Consider special static TLS alignment requirements. */
2859 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2860 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
2863 /* Relocate an i386 ELF section. */
2866 elf_i386_relocate_section (bfd
*output_bfd
,
2867 struct bfd_link_info
*info
,
2869 asection
*input_section
,
2871 Elf_Internal_Rela
*relocs
,
2872 Elf_Internal_Sym
*local_syms
,
2873 asection
**local_sections
)
2875 struct elf_i386_link_hash_table
*htab
;
2876 Elf_Internal_Shdr
*symtab_hdr
;
2877 struct elf_link_hash_entry
**sym_hashes
;
2878 bfd_vma
*local_got_offsets
;
2879 bfd_vma
*local_tlsdesc_gotents
;
2880 Elf_Internal_Rela
*rel
;
2881 Elf_Internal_Rela
*relend
;
2882 bfd_boolean is_vxworks_tls
;
2884 BFD_ASSERT (is_i386_elf (input_bfd
));
2886 htab
= elf_i386_hash_table (info
);
2889 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2890 sym_hashes
= elf_sym_hashes (input_bfd
);
2891 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2892 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2893 /* We have to handle relocations in vxworks .tls_vars sections
2894 specially, because the dynamic loader is 'weird'. */
2895 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2896 && !strcmp (input_section
->output_section
->name
,
2899 elf_i386_set_tls_module_base (info
);
2902 relend
= relocs
+ input_section
->reloc_count
;
2903 for (; rel
< relend
; rel
++)
2905 unsigned int r_type
;
2906 reloc_howto_type
*howto
;
2907 unsigned long r_symndx
;
2908 struct elf_link_hash_entry
*h
;
2909 Elf_Internal_Sym
*sym
;
2911 bfd_vma off
, offplt
;
2913 bfd_boolean unresolved_reloc
;
2914 bfd_reloc_status_type r
;
2918 r_type
= ELF32_R_TYPE (rel
->r_info
);
2919 if (r_type
== R_386_GNU_VTINHERIT
2920 || r_type
== R_386_GNU_VTENTRY
)
2923 if ((indx
= r_type
) >= R_386_standard
2924 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2925 >= R_386_ext
- R_386_standard
)
2926 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2927 >= R_386_irelative
- R_386_ext
))
2929 (*_bfd_error_handler
)
2930 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2931 input_bfd
, input_section
, r_type
);
2932 bfd_set_error (bfd_error_bad_value
);
2935 howto
= elf_howto_table
+ indx
;
2937 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2941 unresolved_reloc
= FALSE
;
2942 if (r_symndx
< symtab_hdr
->sh_info
)
2944 sym
= local_syms
+ r_symndx
;
2945 sec
= local_sections
[r_symndx
];
2946 relocation
= (sec
->output_section
->vma
2947 + sec
->output_offset
2950 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2951 && ((sec
->flags
& SEC_MERGE
) != 0
2952 || (info
->relocatable
2953 && sec
->output_offset
!= 0)))
2956 bfd_byte
*where
= contents
+ rel
->r_offset
;
2958 switch (howto
->size
)
2961 addend
= bfd_get_8 (input_bfd
, where
);
2962 if (howto
->pc_relative
)
2964 addend
= (addend
^ 0x80) - 0x80;
2969 addend
= bfd_get_16 (input_bfd
, where
);
2970 if (howto
->pc_relative
)
2972 addend
= (addend
^ 0x8000) - 0x8000;
2977 addend
= bfd_get_32 (input_bfd
, where
);
2978 if (howto
->pc_relative
)
2980 addend
= (addend
^ 0x80000000) - 0x80000000;
2988 if (info
->relocatable
)
2989 addend
+= sec
->output_offset
;
2992 asection
*msec
= sec
;
2993 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2995 addend
-= relocation
;
2996 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2999 switch (howto
->size
)
3002 /* FIXME: overflow checks. */
3003 if (howto
->pc_relative
)
3005 bfd_put_8 (input_bfd
, addend
, where
);
3008 if (howto
->pc_relative
)
3010 bfd_put_16 (input_bfd
, addend
, where
);
3013 if (howto
->pc_relative
)
3015 bfd_put_32 (input_bfd
, addend
, where
);
3019 else if (!info
->relocatable
3020 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3022 /* Relocate against local STT_GNU_IFUNC symbol. */
3023 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3028 /* Set STT_GNU_IFUNC symbol value. */
3029 h
->root
.u
.def
.value
= sym
->st_value
;
3030 h
->root
.u
.def
.section
= sec
;
3035 bfd_boolean warned ATTRIBUTE_UNUSED
;
3037 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3038 r_symndx
, symtab_hdr
, sym_hashes
,
3040 unresolved_reloc
, warned
);
3043 if (sec
!= NULL
&& elf_discarded_section (sec
))
3044 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3045 rel
, relend
, howto
, contents
);
3047 if (info
->relocatable
)
3050 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3051 it here if it is defined in a non-shared object. */
3053 && h
->type
== STT_GNU_IFUNC
3056 asection
*plt
, *gotplt
, *base_got
;
3060 if ((input_section
->flags
& SEC_ALLOC
) == 0
3061 || h
->plt
.offset
== (bfd_vma
) -1)
3064 /* STT_GNU_IFUNC symbol must go through PLT. */
3065 if (htab
->elf
.splt
!= NULL
)
3067 plt
= htab
->elf
.splt
;
3068 gotplt
= htab
->elf
.sgotplt
;
3072 plt
= htab
->elf
.iplt
;
3073 gotplt
= htab
->elf
.igotplt
;
3076 relocation
= (plt
->output_section
->vma
3077 + plt
->output_offset
+ h
->plt
.offset
);
3082 if (h
->root
.root
.string
)
3083 name
= h
->root
.root
.string
;
3085 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3087 (*_bfd_error_handler
)
3088 (_("%B: relocation %s against STT_GNU_IFUNC "
3089 "symbol `%s' isn't handled by %s"), input_bfd
,
3090 elf_howto_table
[r_type
].name
,
3091 name
, __FUNCTION__
);
3092 bfd_set_error (bfd_error_bad_value
);
3096 /* Generate dynamic relcoation only when there is a
3097 non-GOF reference in a shared object. */
3098 if (info
->shared
&& h
->non_got_ref
)
3100 Elf_Internal_Rela outrel
;
3105 /* Need a dynamic relocation to get the real function
3107 offset
= _bfd_elf_section_offset (output_bfd
,
3111 if (offset
== (bfd_vma
) -1
3112 || offset
== (bfd_vma
) -2)
3115 outrel
.r_offset
= (input_section
->output_section
->vma
3116 + input_section
->output_offset
3119 if (h
->dynindx
== -1
3121 || info
->executable
)
3123 /* This symbol is resolved locally. */
3124 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3125 bfd_put_32 (output_bfd
,
3126 (h
->root
.u
.def
.value
3127 + h
->root
.u
.def
.section
->output_section
->vma
3128 + h
->root
.u
.def
.section
->output_offset
),
3132 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3134 sreloc
= htab
->elf
.irelifunc
;
3135 loc
= sreloc
->contents
;
3136 loc
+= (sreloc
->reloc_count
++
3137 * sizeof (Elf32_External_Rel
));
3138 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3140 /* If this reloc is against an external symbol, we
3141 do not want to fiddle with the addend. Otherwise,
3142 we need to include the symbol value so that it
3143 becomes an addend for the dynamic reloc. For an
3144 internal symbol, we have updated addend. */
3153 base_got
= htab
->elf
.sgot
;
3154 off
= h
->got
.offset
;
3156 if (base_got
== NULL
)
3159 if (off
== (bfd_vma
) -1)
3161 /* We can't use h->got.offset here to save state, or
3162 even just remember the offset, as finish_dynamic_symbol
3163 would use that as offset into .got. */
3165 if (htab
->elf
.splt
!= NULL
)
3167 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3168 off
= (plt_index
+ 3) * 4;
3169 base_got
= htab
->elf
.sgotplt
;
3173 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3174 off
= plt_index
* 4;
3175 base_got
= htab
->elf
.igotplt
;
3178 if (h
->dynindx
== -1
3182 /* This references the local defitionion. We must
3183 initialize this entry in the global offset table.
3184 Since the offset must always be a multiple of 8,
3185 we use the least significant bit to record
3186 whether we have initialized it already.
3188 When doing a dynamic link, we create a .rela.got
3189 relocation entry to initialize the value. This
3190 is done in the finish_dynamic_symbol routine. */
3195 bfd_put_32 (output_bfd
, relocation
,
3196 base_got
->contents
+ off
);
3203 /* Adjust for static executables. */
3204 if (htab
->elf
.splt
== NULL
)
3205 relocation
+= gotplt
->output_offset
;
3209 relocation
= (base_got
->output_section
->vma
3210 + base_got
->output_offset
+ off
3211 - gotplt
->output_section
->vma
3212 - gotplt
->output_offset
);
3213 /* Adjust for static executables. */
3214 if (htab
->elf
.splt
== NULL
)
3215 relocation
+= gotplt
->output_offset
;
3221 relocation
-= (gotplt
->output_section
->vma
3222 + gotplt
->output_offset
);
3230 /* Relocation is to the entry for this symbol in the global
3232 if (htab
->elf
.sgot
== NULL
)
3239 off
= h
->got
.offset
;
3240 dyn
= htab
->elf
.dynamic_sections_created
;
3241 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3243 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3244 || (ELF_ST_VISIBILITY (h
->other
)
3245 && h
->root
.type
== bfd_link_hash_undefweak
))
3247 /* This is actually a static link, or it is a
3248 -Bsymbolic link and the symbol is defined
3249 locally, or the symbol was forced to be local
3250 because of a version file. We must initialize
3251 this entry in the global offset table. Since the
3252 offset must always be a multiple of 4, we use the
3253 least significant bit to record whether we have
3254 initialized it already.
3256 When doing a dynamic link, we create a .rel.got
3257 relocation entry to initialize the value. This
3258 is done in the finish_dynamic_symbol routine. */
3263 bfd_put_32 (output_bfd
, relocation
,
3264 htab
->elf
.sgot
->contents
+ off
);
3269 unresolved_reloc
= FALSE
;
3273 if (local_got_offsets
== NULL
)
3276 off
= local_got_offsets
[r_symndx
];
3278 /* The offset must always be a multiple of 4. We use
3279 the least significant bit to record whether we have
3280 already generated the necessary reloc. */
3285 bfd_put_32 (output_bfd
, relocation
,
3286 htab
->elf
.sgot
->contents
+ off
);
3291 Elf_Internal_Rela outrel
;
3294 s
= htab
->elf
.srelgot
;
3298 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3299 + htab
->elf
.sgot
->output_offset
3301 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3303 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3304 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3307 local_got_offsets
[r_symndx
] |= 1;
3311 if (off
>= (bfd_vma
) -2)
3314 relocation
= htab
->elf
.sgot
->output_section
->vma
3315 + htab
->elf
.sgot
->output_offset
+ off
3316 - htab
->elf
.sgotplt
->output_section
->vma
3317 - htab
->elf
.sgotplt
->output_offset
;
3321 /* Relocation is relative to the start of the global offset
3324 /* Check to make sure it isn't a protected function symbol
3325 for shared library since it may not be local when used
3326 as function address. We also need to make sure that a
3327 symbol is defined locally. */
3328 if (info
->shared
&& h
)
3330 if (!h
->def_regular
)
3334 switch (ELF_ST_VISIBILITY (h
->other
))
3337 v
= _("hidden symbol");
3340 v
= _("internal symbol");
3343 v
= _("protected symbol");
3350 (*_bfd_error_handler
)
3351 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3352 input_bfd
, v
, h
->root
.root
.string
);
3353 bfd_set_error (bfd_error_bad_value
);
3356 else if (!info
->executable
3357 && h
->type
== STT_FUNC
3358 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3360 (*_bfd_error_handler
)
3361 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3362 input_bfd
, h
->root
.root
.string
);
3363 bfd_set_error (bfd_error_bad_value
);
3368 /* Note that sgot is not involved in this
3369 calculation. We always want the start of .got.plt. If we
3370 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3371 permitted by the ABI, we might have to change this
3373 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3374 + htab
->elf
.sgotplt
->output_offset
;
3378 /* Use global offset table as symbol value. */
3379 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3380 + htab
->elf
.sgotplt
->output_offset
;
3381 unresolved_reloc
= FALSE
;
3385 /* Relocation is to the entry for this symbol in the
3386 procedure linkage table. */
3388 /* Resolve a PLT32 reloc against a local symbol directly,
3389 without using the procedure linkage table. */
3393 if (h
->plt
.offset
== (bfd_vma
) -1
3394 || htab
->elf
.splt
== NULL
)
3396 /* We didn't make a PLT entry for this symbol. This
3397 happens when statically linking PIC code, or when
3398 using -Bsymbolic. */
3402 relocation
= (htab
->elf
.splt
->output_section
->vma
3403 + htab
->elf
.splt
->output_offset
3405 unresolved_reloc
= FALSE
;
3410 if ((input_section
->flags
& SEC_ALLOC
) == 0
3416 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3417 || h
->root
.type
!= bfd_link_hash_undefweak
)
3418 && (r_type
!= R_386_PC32
3419 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3420 || (ELIMINATE_COPY_RELOCS
3427 || h
->root
.type
== bfd_link_hash_undefweak
3428 || h
->root
.type
== bfd_link_hash_undefined
)))
3430 Elf_Internal_Rela outrel
;
3432 bfd_boolean skip
, relocate
;
3435 /* When generating a shared object, these relocations
3436 are copied into the output file to be resolved at run
3443 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3445 if (outrel
.r_offset
== (bfd_vma
) -1)
3447 else if (outrel
.r_offset
== (bfd_vma
) -2)
3448 skip
= TRUE
, relocate
= TRUE
;
3449 outrel
.r_offset
+= (input_section
->output_section
->vma
3450 + input_section
->output_offset
);
3453 memset (&outrel
, 0, sizeof outrel
);
3456 && (r_type
== R_386_PC32
3458 || !SYMBOLIC_BIND (info
, h
)
3459 || !h
->def_regular
))
3460 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3463 /* This symbol is local, or marked to become local. */
3465 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3468 sreloc
= elf_section_data (input_section
)->sreloc
;
3470 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3472 r
= bfd_reloc_notsupported
;
3473 goto check_relocation_error
;
3476 loc
= sreloc
->contents
;
3477 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3479 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3481 /* If this reloc is against an external symbol, we do
3482 not want to fiddle with the addend. Otherwise, we
3483 need to include the symbol value so that it becomes
3484 an addend for the dynamic reloc. */
3491 if (!info
->executable
)
3493 Elf_Internal_Rela outrel
;
3497 outrel
.r_offset
= rel
->r_offset
3498 + input_section
->output_section
->vma
3499 + input_section
->output_offset
;
3500 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3501 sreloc
= elf_section_data (input_section
)->sreloc
;
3504 loc
= sreloc
->contents
;
3505 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3506 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3511 case R_386_TLS_GOTDESC
:
3512 case R_386_TLS_DESC_CALL
:
3513 case R_386_TLS_IE_32
:
3514 case R_386_TLS_GOTIE
:
3515 tls_type
= GOT_UNKNOWN
;
3516 if (h
== NULL
&& local_got_offsets
)
3517 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3519 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3520 if (tls_type
== GOT_TLS_IE
)
3521 tls_type
= GOT_TLS_IE_NEG
;
3523 if (! elf_i386_tls_transition (info
, input_bfd
,
3524 input_section
, contents
,
3525 symtab_hdr
, sym_hashes
,
3526 &r_type
, tls_type
, rel
,
3527 relend
, h
, r_symndx
))
3530 if (r_type
== R_386_TLS_LE_32
)
3532 BFD_ASSERT (! unresolved_reloc
);
3533 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3538 /* GD->LE transition. */
3539 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3542 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3544 movl %gs:0, %eax; subl $foo@tpoff, %eax
3545 (6 byte form of subl). */
3546 memcpy (contents
+ rel
->r_offset
- 3,
3547 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3548 roff
= rel
->r_offset
+ 5;
3552 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3554 movl %gs:0, %eax; subl $foo@tpoff, %eax
3555 (6 byte form of subl). */
3556 memcpy (contents
+ rel
->r_offset
- 2,
3557 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3558 roff
= rel
->r_offset
+ 6;
3560 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3562 /* Skip R_386_PC32/R_386_PLT32. */
3566 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3568 /* GDesc -> LE transition.
3569 It's originally something like:
3570 leal x@tlsdesc(%ebx), %eax
3574 Registers other than %eax may be set up here. */
3579 roff
= rel
->r_offset
;
3580 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3582 /* Now modify the instruction as appropriate. */
3583 /* aoliva FIXME: remove the above and xor the byte
3585 bfd_put_8 (output_bfd
, val
^ 0x86,
3586 contents
+ roff
- 1);
3587 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3591 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3593 /* GDesc -> LE transition.
3601 roff
= rel
->r_offset
;
3602 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3603 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3606 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3610 /* IE->LE transition:
3611 Originally it can be one of:
3619 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3622 /* movl foo, %eax. */
3623 bfd_put_8 (output_bfd
, 0xb8,
3624 contents
+ rel
->r_offset
- 1);
3630 type
= bfd_get_8 (input_bfd
,
3631 contents
+ rel
->r_offset
- 2);
3636 bfd_put_8 (output_bfd
, 0xc7,
3637 contents
+ rel
->r_offset
- 2);
3638 bfd_put_8 (output_bfd
,
3639 0xc0 | ((val
>> 3) & 7),
3640 contents
+ rel
->r_offset
- 1);
3644 bfd_put_8 (output_bfd
, 0x81,
3645 contents
+ rel
->r_offset
- 2);
3646 bfd_put_8 (output_bfd
,
3647 0xc0 | ((val
>> 3) & 7),
3648 contents
+ rel
->r_offset
- 1);
3655 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3656 contents
+ rel
->r_offset
);
3661 unsigned int val
, type
;
3663 /* {IE_32,GOTIE}->LE transition:
3664 Originally it can be one of:
3665 subl foo(%reg1), %reg2
3666 movl foo(%reg1), %reg2
3667 addl foo(%reg1), %reg2
3670 movl $foo, %reg2 (6 byte form)
3671 addl $foo, %reg2. */
3672 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3673 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3677 bfd_put_8 (output_bfd
, 0xc7,
3678 contents
+ rel
->r_offset
- 2);
3679 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3680 contents
+ rel
->r_offset
- 1);
3682 else if (type
== 0x2b)
3685 bfd_put_8 (output_bfd
, 0x81,
3686 contents
+ rel
->r_offset
- 2);
3687 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3688 contents
+ rel
->r_offset
- 1);
3690 else if (type
== 0x03)
3693 bfd_put_8 (output_bfd
, 0x81,
3694 contents
+ rel
->r_offset
- 2);
3695 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3696 contents
+ rel
->r_offset
- 1);
3700 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3701 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3702 contents
+ rel
->r_offset
);
3704 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3705 contents
+ rel
->r_offset
);
3710 if (htab
->elf
.sgot
== NULL
)
3715 off
= h
->got
.offset
;
3716 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3720 if (local_got_offsets
== NULL
)
3723 off
= local_got_offsets
[r_symndx
];
3724 offplt
= local_tlsdesc_gotents
[r_symndx
];
3731 Elf_Internal_Rela outrel
;
3736 if (htab
->elf
.srelgot
== NULL
)
3739 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3741 if (GOT_TLS_GDESC_P (tls_type
))
3743 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3744 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3745 <= htab
->elf
.sgotplt
->size
);
3746 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3747 + htab
->elf
.sgotplt
->output_offset
3749 + htab
->sgotplt_jump_table_size
);
3750 sreloc
= htab
->elf
.srelplt
;
3751 loc
= sreloc
->contents
;
3752 loc
+= (htab
->next_tls_desc_index
++
3753 * sizeof (Elf32_External_Rel
));
3754 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3755 <= sreloc
->contents
+ sreloc
->size
);
3756 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3759 BFD_ASSERT (! unresolved_reloc
);
3760 bfd_put_32 (output_bfd
,
3761 relocation
- elf_i386_dtpoff_base (info
),
3762 htab
->elf
.sgotplt
->contents
+ offplt
3763 + htab
->sgotplt_jump_table_size
+ 4);
3767 bfd_put_32 (output_bfd
, 0,
3768 htab
->elf
.sgotplt
->contents
+ offplt
3769 + htab
->sgotplt_jump_table_size
+ 4);
3773 sreloc
= htab
->elf
.srelgot
;
3775 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3776 + htab
->elf
.sgot
->output_offset
+ off
);
3778 if (GOT_TLS_GD_P (tls_type
))
3779 dr_type
= R_386_TLS_DTPMOD32
;
3780 else if (GOT_TLS_GDESC_P (tls_type
))
3782 else if (tls_type
== GOT_TLS_IE_POS
)
3783 dr_type
= R_386_TLS_TPOFF
;
3785 dr_type
= R_386_TLS_TPOFF32
;
3787 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3788 bfd_put_32 (output_bfd
,
3789 relocation
- elf_i386_dtpoff_base (info
),
3790 htab
->elf
.sgot
->contents
+ off
);
3791 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3792 bfd_put_32 (output_bfd
,
3793 elf_i386_dtpoff_base (info
) - relocation
,
3794 htab
->elf
.sgot
->contents
+ off
);
3795 else if (dr_type
!= R_386_TLS_DESC
)
3796 bfd_put_32 (output_bfd
, 0,
3797 htab
->elf
.sgot
->contents
+ off
);
3798 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3800 loc
= sreloc
->contents
;
3801 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3802 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3803 <= sreloc
->contents
+ sreloc
->size
);
3804 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3806 if (GOT_TLS_GD_P (tls_type
))
3810 BFD_ASSERT (! unresolved_reloc
);
3811 bfd_put_32 (output_bfd
,
3812 relocation
- elf_i386_dtpoff_base (info
),
3813 htab
->elf
.sgot
->contents
+ off
+ 4);
3817 bfd_put_32 (output_bfd
, 0,
3818 htab
->elf
.sgot
->contents
+ off
+ 4);
3819 outrel
.r_info
= ELF32_R_INFO (indx
,
3820 R_386_TLS_DTPOFF32
);
3821 outrel
.r_offset
+= 4;
3822 sreloc
->reloc_count
++;
3823 loc
+= sizeof (Elf32_External_Rel
);
3824 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3825 <= sreloc
->contents
+ sreloc
->size
);
3826 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3829 else if (tls_type
== GOT_TLS_IE_BOTH
)
3831 bfd_put_32 (output_bfd
,
3833 ? relocation
- elf_i386_dtpoff_base (info
)
3835 htab
->elf
.sgot
->contents
+ off
+ 4);
3836 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3837 outrel
.r_offset
+= 4;
3838 sreloc
->reloc_count
++;
3839 loc
+= sizeof (Elf32_External_Rel
);
3840 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3847 local_got_offsets
[r_symndx
] |= 1;
3850 if (off
>= (bfd_vma
) -2
3851 && ! GOT_TLS_GDESC_P (tls_type
))
3853 if (r_type
== R_386_TLS_GOTDESC
3854 || r_type
== R_386_TLS_DESC_CALL
)
3856 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3857 unresolved_reloc
= FALSE
;
3859 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3861 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3862 + htab
->elf
.sgotplt
->output_offset
;
3863 relocation
= htab
->elf
.sgot
->output_section
->vma
3864 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3865 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3866 && tls_type
== GOT_TLS_IE_BOTH
)
3868 if (r_type
== R_386_TLS_IE
)
3869 relocation
+= g_o_t
;
3870 unresolved_reloc
= FALSE
;
3872 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3874 unsigned int val
, type
;
3877 /* GD->IE transition. */
3878 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3879 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3882 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3884 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3886 roff
= rel
->r_offset
- 3;
3890 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3892 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3893 roff
= rel
->r_offset
- 2;
3895 memcpy (contents
+ roff
,
3896 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3897 contents
[roff
+ 7] = 0x80 | (val
& 7);
3898 /* If foo is used only with foo@gotntpoff(%reg) and
3899 foo@indntpoff, but not with foo@gottpoff(%reg), change
3900 subl $foo@gottpoff(%reg), %eax
3902 addl $foo@gotntpoff(%reg), %eax. */
3903 if (tls_type
== GOT_TLS_IE_POS
)
3904 contents
[roff
+ 6] = 0x03;
3905 bfd_put_32 (output_bfd
,
3906 htab
->elf
.sgot
->output_section
->vma
3907 + htab
->elf
.sgot
->output_offset
+ off
3908 - htab
->elf
.sgotplt
->output_section
->vma
3909 - htab
->elf
.sgotplt
->output_offset
,
3910 contents
+ roff
+ 8);
3911 /* Skip R_386_PLT32. */
3915 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3917 /* GDesc -> IE transition.
3918 It's originally something like:
3919 leal x@tlsdesc(%ebx), %eax
3922 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3924 movl x@gottpoff(%ebx), %eax # before negl %eax
3926 Registers other than %eax may be set up here. */
3930 /* First, make sure it's a leal adding ebx to a 32-bit
3931 offset into any register, although it's probably
3932 almost always going to be eax. */
3933 roff
= rel
->r_offset
;
3935 /* Now modify the instruction as appropriate. */
3936 /* To turn a leal into a movl in the form we use it, it
3937 suffices to change the first byte from 0x8d to 0x8b.
3938 aoliva FIXME: should we decide to keep the leal, all
3939 we have to do is remove the statement below, and
3940 adjust the relaxation of R_386_TLS_DESC_CALL. */
3941 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3943 if (tls_type
== GOT_TLS_IE_BOTH
)
3946 bfd_put_32 (output_bfd
,
3947 htab
->elf
.sgot
->output_section
->vma
3948 + htab
->elf
.sgot
->output_offset
+ off
3949 - htab
->elf
.sgotplt
->output_section
->vma
3950 - htab
->elf
.sgotplt
->output_offset
,
3954 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3956 /* GDesc -> IE transition.
3964 depending on how we transformed the TLS_GOTDESC above.
3969 roff
= rel
->r_offset
;
3971 /* Now modify the instruction as appropriate. */
3972 if (tls_type
!= GOT_TLS_IE_NEG
)
3975 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3976 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3981 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3982 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3992 if (! elf_i386_tls_transition (info
, input_bfd
,
3993 input_section
, contents
,
3994 symtab_hdr
, sym_hashes
,
3995 &r_type
, GOT_UNKNOWN
, rel
,
3996 relend
, h
, r_symndx
))
3999 if (r_type
!= R_386_TLS_LDM
)
4001 /* LD->LE transition:
4002 leal foo(%reg), %eax; call ___tls_get_addr.
4004 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4005 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4006 memcpy (contents
+ rel
->r_offset
- 2,
4007 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4008 /* Skip R_386_PC32/R_386_PLT32. */
4013 if (htab
->elf
.sgot
== NULL
)
4016 off
= htab
->tls_ldm_got
.offset
;
4021 Elf_Internal_Rela outrel
;
4024 if (htab
->elf
.srelgot
== NULL
)
4027 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4028 + htab
->elf
.sgot
->output_offset
+ off
);
4030 bfd_put_32 (output_bfd
, 0,
4031 htab
->elf
.sgot
->contents
+ off
);
4032 bfd_put_32 (output_bfd
, 0,
4033 htab
->elf
.sgot
->contents
+ off
+ 4);
4034 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4035 loc
= htab
->elf
.srelgot
->contents
;
4036 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4037 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4038 htab
->tls_ldm_got
.offset
|= 1;
4040 relocation
= htab
->elf
.sgot
->output_section
->vma
4041 + htab
->elf
.sgot
->output_offset
+ off
4042 - htab
->elf
.sgotplt
->output_section
->vma
4043 - htab
->elf
.sgotplt
->output_offset
;
4044 unresolved_reloc
= FALSE
;
4047 case R_386_TLS_LDO_32
:
4048 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4049 relocation
-= elf_i386_dtpoff_base (info
);
4051 /* When converting LDO to LE, we must negate. */
4052 relocation
= -elf_i386_tpoff (info
, relocation
);
4055 case R_386_TLS_LE_32
:
4057 if (!info
->executable
)
4059 Elf_Internal_Rela outrel
;
4063 outrel
.r_offset
= rel
->r_offset
4064 + input_section
->output_section
->vma
4065 + input_section
->output_offset
;
4066 if (h
!= NULL
&& h
->dynindx
!= -1)
4070 if (r_type
== R_386_TLS_LE_32
)
4071 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4073 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4074 sreloc
= elf_section_data (input_section
)->sreloc
;
4077 loc
= sreloc
->contents
;
4078 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4079 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4082 else if (r_type
== R_386_TLS_LE_32
)
4083 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4085 relocation
-= elf_i386_dtpoff_base (info
);
4087 else if (r_type
== R_386_TLS_LE_32
)
4088 relocation
= elf_i386_tpoff (info
, relocation
);
4090 relocation
= -elf_i386_tpoff (info
, relocation
);
4097 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4098 because such sections are not SEC_ALLOC and thus ld.so will
4099 not process them. */
4100 if (unresolved_reloc
4101 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4104 (*_bfd_error_handler
)
4105 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4108 (long) rel
->r_offset
,
4110 h
->root
.root
.string
);
4115 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4116 contents
, rel
->r_offset
,
4119 check_relocation_error
:
4120 if (r
!= bfd_reloc_ok
)
4125 name
= h
->root
.root
.string
;
4128 name
= bfd_elf_string_from_elf_section (input_bfd
,
4129 symtab_hdr
->sh_link
,
4134 name
= bfd_section_name (input_bfd
, sec
);
4137 if (r
== bfd_reloc_overflow
)
4139 if (! ((*info
->callbacks
->reloc_overflow
)
4140 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4141 (bfd_vma
) 0, input_bfd
, input_section
,
4147 (*_bfd_error_handler
)
4148 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4149 input_bfd
, input_section
,
4150 (long) rel
->r_offset
, name
, (int) r
);
4159 /* Finish up dynamic symbol handling. We set the contents of various
4160 dynamic sections here. */
4163 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4164 struct bfd_link_info
*info
,
4165 struct elf_link_hash_entry
*h
,
4166 Elf_Internal_Sym
*sym
)
4168 struct elf_i386_link_hash_table
*htab
;
4170 htab
= elf_i386_hash_table (info
);
4174 if (h
->plt
.offset
!= (bfd_vma
) -1)
4178 Elf_Internal_Rela rel
;
4180 asection
*plt
, *gotplt
, *relplt
;
4182 /* When building a static executable, use .iplt, .igot.plt and
4183 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4184 if (htab
->elf
.splt
!= NULL
)
4186 plt
= htab
->elf
.splt
;
4187 gotplt
= htab
->elf
.sgotplt
;
4188 relplt
= htab
->elf
.srelplt
;
4192 plt
= htab
->elf
.iplt
;
4193 gotplt
= htab
->elf
.igotplt
;
4194 relplt
= htab
->elf
.irelplt
;
4197 /* This symbol has an entry in the procedure linkage table. Set
4200 if ((h
->dynindx
== -1
4201 && !((h
->forced_local
|| info
->executable
)
4203 && h
->type
== STT_GNU_IFUNC
))
4209 /* Get the index in the procedure linkage table which
4210 corresponds to this symbol. This is the index of this symbol
4211 in all the symbols for which we are making plt entries. The
4212 first entry in the procedure linkage table is reserved.
4214 Get the offset into the .got table of the entry that
4215 corresponds to this function. Each .got entry is 4 bytes.
4216 The first three are reserved.
4218 For static executables, we don't reserve anything. */
4220 if (plt
== htab
->elf
.splt
)
4222 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
4223 got_offset
= (plt_index
+ 3) * 4;
4227 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4228 got_offset
= plt_index
* 4;
4231 /* Fill in the entry in the procedure linkage table. */
4234 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4236 bfd_put_32 (output_bfd
,
4237 (gotplt
->output_section
->vma
4238 + gotplt
->output_offset
4240 plt
->contents
+ h
->plt
.offset
+ 2);
4242 if (htab
->is_vxworks
)
4244 int s
, k
, reloc_index
;
4246 /* Create the R_386_32 relocation referencing the GOT
4247 for this PLT entry. */
4249 /* S: Current slot number (zero-based). */
4250 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4251 /* K: Number of relocations for PLTResolve. */
4253 k
= PLTRESOLVE_RELOCS_SHLIB
;
4255 k
= PLTRESOLVE_RELOCS
;
4256 /* Skip the PLTresolve relocations, and the relocations for
4257 the other PLT slots. */
4258 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4259 loc
= (htab
->srelplt2
->contents
+ reloc_index
4260 * sizeof (Elf32_External_Rel
));
4262 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4263 + htab
->elf
.splt
->output_offset
4264 + h
->plt
.offset
+ 2),
4265 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4266 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4268 /* Create the R_386_32 relocation referencing the beginning of
4269 the PLT for this GOT entry. */
4270 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4271 + htab
->elf
.sgotplt
->output_offset
4273 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4274 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4275 loc
+ sizeof (Elf32_External_Rel
));
4280 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4282 bfd_put_32 (output_bfd
, got_offset
,
4283 plt
->contents
+ h
->plt
.offset
+ 2);
4286 /* Don't fill PLT entry for static executables. */
4287 if (plt
== htab
->elf
.splt
)
4289 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4290 plt
->contents
+ h
->plt
.offset
+ 7);
4291 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4292 plt
->contents
+ h
->plt
.offset
+ 12);
4295 /* Fill in the entry in the global offset table. */
4296 bfd_put_32 (output_bfd
,
4297 (plt
->output_section
->vma
4298 + plt
->output_offset
4301 gotplt
->contents
+ got_offset
);
4303 /* Fill in the entry in the .rel.plt section. */
4304 rel
.r_offset
= (gotplt
->output_section
->vma
4305 + gotplt
->output_offset
4307 if (h
->dynindx
== -1
4308 || ((info
->executable
4309 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4311 && h
->type
== STT_GNU_IFUNC
))
4313 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4314 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4315 in the .got.plt section. */
4316 bfd_put_32 (output_bfd
,
4317 (h
->root
.u
.def
.value
4318 + h
->root
.u
.def
.section
->output_section
->vma
4319 + h
->root
.u
.def
.section
->output_offset
),
4320 gotplt
->contents
+ got_offset
);
4321 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4324 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4325 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4326 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4328 if (!h
->def_regular
)
4330 /* Mark the symbol as undefined, rather than as defined in
4331 the .plt section. Leave the value if there were any
4332 relocations where pointer equality matters (this is a clue
4333 for the dynamic linker, to make function pointer
4334 comparisons work between an application and shared
4335 library), otherwise set it to zero. If a function is only
4336 called from a binary, there is no need to slow down
4337 shared libraries because of that. */
4338 sym
->st_shndx
= SHN_UNDEF
;
4339 if (!h
->pointer_equality_needed
)
4344 if (h
->got
.offset
!= (bfd_vma
) -1
4345 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4346 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4348 Elf_Internal_Rela rel
;
4351 /* This symbol has an entry in the global offset table. Set it
4354 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4357 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4358 + htab
->elf
.sgot
->output_offset
4359 + (h
->got
.offset
& ~(bfd_vma
) 1));
4361 /* If this is a static link, or it is a -Bsymbolic link and the
4362 symbol is defined locally or was forced to be local because
4363 of a version file, we just want to emit a RELATIVE reloc.
4364 The entry in the global offset table will already have been
4365 initialized in the relocate_section function. */
4367 && h
->type
== STT_GNU_IFUNC
)
4371 /* Generate R_386_GLOB_DAT. */
4378 if (!h
->pointer_equality_needed
)
4381 /* For non-shared object, we can't use .got.plt, which
4382 contains the real function addres if we need pointer
4383 equality. We load the GOT entry with the PLT entry. */
4384 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4385 bfd_put_32 (output_bfd
,
4386 (plt
->output_section
->vma
4387 + plt
->output_offset
+ h
->plt
.offset
),
4388 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4392 else if (info
->shared
4393 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4395 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4396 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4400 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4402 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4403 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4404 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4407 loc
= htab
->elf
.srelgot
->contents
;
4408 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4409 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4414 Elf_Internal_Rela rel
;
4417 /* This symbol needs a copy reloc. Set it up. */
4419 if (h
->dynindx
== -1
4420 || (h
->root
.type
!= bfd_link_hash_defined
4421 && h
->root
.type
!= bfd_link_hash_defweak
)
4422 || htab
->srelbss
== NULL
)
4425 rel
.r_offset
= (h
->root
.u
.def
.value
4426 + h
->root
.u
.def
.section
->output_section
->vma
4427 + h
->root
.u
.def
.section
->output_offset
);
4428 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4429 loc
= htab
->srelbss
->contents
;
4430 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4431 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4434 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4435 be NULL for local symbols.
4437 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4438 is relative to the ".got" section. */
4440 && (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4441 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
)))
4442 sym
->st_shndx
= SHN_ABS
;
4447 /* Finish up local dynamic symbol handling. We set the contents of
4448 various dynamic sections here. */
4451 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4453 struct elf_link_hash_entry
*h
4454 = (struct elf_link_hash_entry
*) *slot
;
4455 struct bfd_link_info
*info
4456 = (struct bfd_link_info
*) inf
;
4458 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4462 /* Used to decide how to sort relocs in an optimal manner for the
4463 dynamic linker, before writing them out. */
4465 static enum elf_reloc_type_class
4466 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4468 switch (ELF32_R_TYPE (rela
->r_info
))
4470 case R_386_RELATIVE
:
4471 return reloc_class_relative
;
4472 case R_386_JUMP_SLOT
:
4473 return reloc_class_plt
;
4475 return reloc_class_copy
;
4477 return reloc_class_normal
;
4481 /* Finish up the dynamic sections. */
4484 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4485 struct bfd_link_info
*info
)
4487 struct elf_i386_link_hash_table
*htab
;
4491 htab
= elf_i386_hash_table (info
);
4495 dynobj
= htab
->elf
.dynobj
;
4496 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4498 if (htab
->elf
.dynamic_sections_created
)
4500 Elf32_External_Dyn
*dyncon
, *dynconend
;
4502 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4505 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4506 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4507 for (; dyncon
< dynconend
; dyncon
++)
4509 Elf_Internal_Dyn dyn
;
4512 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4517 if (htab
->is_vxworks
4518 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4523 s
= htab
->elf
.sgotplt
;
4524 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4528 s
= htab
->elf
.srelplt
;
4529 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4533 s
= htab
->elf
.srelplt
;
4534 dyn
.d_un
.d_val
= s
->size
;
4538 /* My reading of the SVR4 ABI indicates that the
4539 procedure linkage table relocs (DT_JMPREL) should be
4540 included in the overall relocs (DT_REL). This is
4541 what Solaris does. However, UnixWare can not handle
4542 that case. Therefore, we override the DT_RELSZ entry
4543 here to make it not include the JMPREL relocs. */
4544 s
= htab
->elf
.srelplt
;
4547 dyn
.d_un
.d_val
-= s
->size
;
4551 /* We may not be using the standard ELF linker script.
4552 If .rel.plt is the first .rel section, we adjust
4553 DT_REL to not include it. */
4554 s
= htab
->elf
.srelplt
;
4557 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4559 dyn
.d_un
.d_ptr
+= s
->size
;
4563 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4566 /* Fill in the first entry in the procedure linkage table. */
4567 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4571 memcpy (htab
->elf
.splt
->contents
, elf_i386_pic_plt0_entry
,
4572 sizeof (elf_i386_pic_plt0_entry
));
4573 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4574 htab
->plt0_pad_byte
,
4575 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4579 memcpy (htab
->elf
.splt
->contents
, elf_i386_plt0_entry
,
4580 sizeof(elf_i386_plt0_entry
));
4581 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4582 htab
->plt0_pad_byte
,
4583 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4584 bfd_put_32 (output_bfd
,
4585 (htab
->elf
.sgotplt
->output_section
->vma
4586 + htab
->elf
.sgotplt
->output_offset
4588 htab
->elf
.splt
->contents
+ 2);
4589 bfd_put_32 (output_bfd
,
4590 (htab
->elf
.sgotplt
->output_section
->vma
4591 + htab
->elf
.sgotplt
->output_offset
4593 htab
->elf
.splt
->contents
+ 8);
4595 if (htab
->is_vxworks
)
4597 Elf_Internal_Rela rel
;
4599 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4600 On IA32 we use REL relocations so the addend goes in
4601 the PLT directly. */
4602 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4603 + htab
->elf
.splt
->output_offset
4605 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4606 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4607 htab
->srelplt2
->contents
);
4608 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4609 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4610 + htab
->elf
.splt
->output_offset
4612 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4613 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4614 htab
->srelplt2
->contents
+
4615 sizeof (Elf32_External_Rel
));
4619 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4620 really seem like the right value. */
4621 elf_section_data (htab
->elf
.splt
->output_section
)
4622 ->this_hdr
.sh_entsize
= 4;
4624 /* Correct the .rel.plt.unloaded relocations. */
4625 if (htab
->is_vxworks
&& !info
->shared
)
4627 int num_plts
= (htab
->elf
.splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4630 p
= htab
->srelplt2
->contents
;
4632 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4634 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4636 for (; num_plts
; num_plts
--)
4638 Elf_Internal_Rela rel
;
4639 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4640 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4641 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4642 p
+= sizeof (Elf32_External_Rel
);
4644 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4645 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4646 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4647 p
+= sizeof (Elf32_External_Rel
);
4653 if (htab
->elf
.sgotplt
)
4655 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4657 (*_bfd_error_handler
)
4658 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4662 /* Fill in the first three entries in the global offset table. */
4663 if (htab
->elf
.sgotplt
->size
> 0)
4665 bfd_put_32 (output_bfd
,
4667 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4668 htab
->elf
.sgotplt
->contents
);
4669 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4670 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4673 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4676 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4677 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4679 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4680 htab_traverse (htab
->loc_hash_table
,
4681 elf_i386_finish_local_dynamic_symbol
,
4687 /* Return address for Ith PLT stub in section PLT, for relocation REL
4688 or (bfd_vma) -1 if it should not be included. */
4691 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4692 const arelent
*rel ATTRIBUTE_UNUSED
)
4694 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4697 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4700 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4702 if (h
->plt
.offset
!= (bfd_vma
) -1
4704 && !h
->pointer_equality_needed
)
4707 return _bfd_elf_hash_symbol (h
);
4710 /* Hook called by the linker routine which adds symbols from an object
4714 elf_i386_add_symbol_hook (bfd
* abfd
,
4715 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4716 Elf_Internal_Sym
* sym
,
4717 const char ** namep ATTRIBUTE_UNUSED
,
4718 flagword
* flagsp ATTRIBUTE_UNUSED
,
4719 asection
** secp ATTRIBUTE_UNUSED
,
4720 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4722 if ((abfd
->flags
& DYNAMIC
) == 0
4723 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
4724 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
4725 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
4730 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4731 #define TARGET_LITTLE_NAME "elf32-i386"
4732 #define ELF_ARCH bfd_arch_i386
4733 #define ELF_TARGET_ID I386_ELF_DATA
4734 #define ELF_MACHINE_CODE EM_386
4735 #define ELF_MAXPAGESIZE 0x1000
4737 #define elf_backend_can_gc_sections 1
4738 #define elf_backend_can_refcount 1
4739 #define elf_backend_want_got_plt 1
4740 #define elf_backend_plt_readonly 1
4741 #define elf_backend_want_plt_sym 0
4742 #define elf_backend_got_header_size 12
4744 /* Support RELA for objdump of prelink objects. */
4745 #define elf_info_to_howto elf_i386_info_to_howto_rel
4746 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4748 #define bfd_elf32_mkobject elf_i386_mkobject
4750 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4751 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4752 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4753 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4754 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4756 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4757 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4758 #define elf_backend_check_relocs elf_i386_check_relocs
4759 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4760 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4761 #define elf_backend_fake_sections elf_i386_fake_sections
4762 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4763 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4764 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4765 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4766 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4767 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4768 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4769 #define elf_backend_relocate_section elf_i386_relocate_section
4770 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4771 #define elf_backend_always_size_sections elf_i386_always_size_sections
4772 #define elf_backend_omit_section_dynsym \
4773 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4774 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4775 #define elf_backend_hash_symbol elf_i386_hash_symbol
4776 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4777 #undef elf_backend_post_process_headers
4778 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4780 #include "elf32-target.h"
4782 /* FreeBSD support. */
4784 #undef TARGET_LITTLE_SYM
4785 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4786 #undef TARGET_LITTLE_NAME
4787 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4789 #define ELF_OSABI ELFOSABI_FREEBSD
4791 /* The kernel recognizes executables as valid only if they carry a
4792 "FreeBSD" label in the ELF header. So we put this label on all
4793 executables and (for simplicity) also all other object files. */
4796 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4798 _bfd_elf_set_osabi (abfd
, info
);
4800 #ifdef OLD_FREEBSD_ABI_LABEL
4801 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4802 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4806 #undef elf_backend_post_process_headers
4807 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4809 #define elf32_bed elf32_i386_fbsd_bed
4811 #undef elf_backend_add_symbol_hook
4813 #include "elf32-target.h"
4817 #undef TARGET_LITTLE_SYM
4818 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
4819 #undef TARGET_LITTLE_NAME
4820 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4822 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4823 objects won't be recognized. */
4827 #define elf32_bed elf32_i386_sol2_bed
4829 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4831 #undef elf_backend_static_tls_alignment
4832 #define elf_backend_static_tls_alignment 8
4834 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4836 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4838 #undef elf_backend_want_plt_sym
4839 #define elf_backend_want_plt_sym 1
4841 #include "elf32-target.h"
4843 /* VxWorks support. */
4845 #undef TARGET_LITTLE_SYM
4846 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4847 #undef TARGET_LITTLE_NAME
4848 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4851 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4853 static struct bfd_link_hash_table
*
4854 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4856 struct bfd_link_hash_table
*ret
;
4857 struct elf_i386_link_hash_table
*htab
;
4859 ret
= elf_i386_link_hash_table_create (abfd
);
4862 htab
= (struct elf_i386_link_hash_table
*) ret
;
4863 htab
->is_vxworks
= 1;
4864 htab
->plt0_pad_byte
= 0x90;
4871 #undef elf_backend_relocs_compatible
4872 #undef elf_backend_post_process_headers
4873 #undef bfd_elf32_bfd_link_hash_table_create
4874 #define bfd_elf32_bfd_link_hash_table_create \
4875 elf_i386_vxworks_link_hash_table_create
4876 #undef elf_backend_add_symbol_hook
4877 #define elf_backend_add_symbol_hook \
4878 elf_vxworks_add_symbol_hook
4879 #undef elf_backend_link_output_symbol_hook
4880 #define elf_backend_link_output_symbol_hook \
4881 elf_vxworks_link_output_symbol_hook
4882 #undef elf_backend_emit_relocs
4883 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4884 #undef elf_backend_final_write_processing
4885 #define elf_backend_final_write_processing \
4886 elf_vxworks_final_write_processing
4887 #undef elf_backend_static_tls_alignment
4889 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4891 #undef elf_backend_want_plt_sym
4892 #define elf_backend_want_plt_sym 1
4895 #define elf32_bed elf32_i386_vxworks_bed
4897 #include "elf32-target.h"