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 (htab
->elf
.dynobj
== NULL
)
1380 htab
->elf
.dynobj
= abfd
;
1381 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1386 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1387 it here if it is defined in a non-shared object. */
1388 if (h
->type
== STT_GNU_IFUNC
1391 /* It is referenced by a non-shared object. */
1395 /* STT_GNU_IFUNC symbol must go through PLT. */
1396 h
->plt
.refcount
+= 1;
1398 /* STT_GNU_IFUNC needs dynamic sections. */
1399 if (htab
->elf
.dynobj
== NULL
)
1400 htab
->elf
.dynobj
= abfd
;
1405 if (h
->root
.root
.string
)
1406 name
= h
->root
.root
.string
;
1408 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1410 (*_bfd_error_handler
)
1411 (_("%B: relocation %s against STT_GNU_IFUNC "
1412 "symbol `%s' isn't handled by %s"), abfd
,
1413 elf_howto_table
[r_type
].name
,
1414 name
, __FUNCTION__
);
1415 bfd_set_error (bfd_error_bad_value
);
1420 h
->pointer_equality_needed
= 1;
1423 /* We must copy these reloc types into the
1424 output file. Create a reloc section in
1425 dynobj and make room for this reloc. */
1426 sreloc
= _bfd_elf_create_ifunc_dyn_reloc
1427 (abfd
, info
, sec
, sreloc
,
1428 &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
);
1443 h
->got
.refcount
+= 1;
1444 if (htab
->elf
.sgot
== NULL
1445 && !_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1455 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1456 symtab_hdr
, sym_hashes
,
1457 &r_type
, GOT_UNKNOWN
,
1458 rel
, rel_end
, h
, r_symndx
))
1464 htab
->tls_ldm_got
.refcount
+= 1;
1468 /* This symbol requires a procedure linkage table entry. We
1469 actually build the entry in adjust_dynamic_symbol,
1470 because this might be a case of linking PIC code which is
1471 never referenced by a dynamic object, in which case we
1472 don't need to generate a procedure linkage table entry
1475 /* If this is a local symbol, we resolve it directly without
1476 creating a procedure linkage table entry. */
1481 h
->plt
.refcount
+= 1;
1484 case R_386_TLS_IE_32
:
1486 case R_386_TLS_GOTIE
:
1487 if (!info
->executable
)
1488 info
->flags
|= DF_STATIC_TLS
;
1493 case R_386_TLS_GOTDESC
:
1494 case R_386_TLS_DESC_CALL
:
1495 /* This symbol requires a global offset table entry. */
1497 int tls_type
, old_tls_type
;
1502 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1503 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1504 case R_386_TLS_GOTDESC
:
1505 case R_386_TLS_DESC_CALL
:
1506 tls_type
= GOT_TLS_GDESC
; break;
1507 case R_386_TLS_IE_32
:
1508 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1509 tls_type
= GOT_TLS_IE_NEG
;
1511 /* If this is a GD->IE transition, we may use either of
1512 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1513 tls_type
= GOT_TLS_IE
;
1516 case R_386_TLS_GOTIE
:
1517 tls_type
= GOT_TLS_IE_POS
; break;
1522 h
->got
.refcount
+= 1;
1523 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1527 bfd_signed_vma
*local_got_refcounts
;
1529 /* This is a global offset table entry for a local symbol. */
1530 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1531 if (local_got_refcounts
== NULL
)
1535 size
= symtab_hdr
->sh_info
;
1536 size
*= (sizeof (bfd_signed_vma
)
1537 + sizeof (bfd_vma
) + sizeof(char));
1538 local_got_refcounts
= (bfd_signed_vma
*)
1539 bfd_zalloc (abfd
, size
);
1540 if (local_got_refcounts
== NULL
)
1542 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1543 elf_i386_local_tlsdesc_gotent (abfd
)
1544 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1545 elf_i386_local_got_tls_type (abfd
)
1546 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1548 local_got_refcounts
[r_symndx
] += 1;
1549 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1552 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1553 tls_type
|= old_tls_type
;
1554 /* If a TLS symbol is accessed using IE at least once,
1555 there is no point to use dynamic model for it. */
1556 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1557 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1558 || (tls_type
& GOT_TLS_IE
) == 0))
1560 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1561 tls_type
= old_tls_type
;
1562 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1563 && GOT_TLS_GD_ANY_P (tls_type
))
1564 tls_type
|= old_tls_type
;
1568 name
= h
->root
.root
.string
;
1570 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1572 (*_bfd_error_handler
)
1573 (_("%B: `%s' accessed both as normal and "
1574 "thread local symbol"),
1580 if (old_tls_type
!= tls_type
)
1583 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1585 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1593 if (htab
->elf
.sgot
== NULL
)
1595 if (htab
->elf
.dynobj
== NULL
)
1596 htab
->elf
.dynobj
= abfd
;
1597 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1600 if (r_type
!= R_386_TLS_IE
)
1604 case R_386_TLS_LE_32
:
1606 if (info
->executable
)
1608 info
->flags
|= DF_STATIC_TLS
;
1613 if (h
!= NULL
&& info
->executable
)
1615 /* If this reloc is in a read-only section, we might
1616 need a copy reloc. We can't check reliably at this
1617 stage whether the section is read-only, as input
1618 sections have not yet been mapped to output sections.
1619 Tentatively set the flag for now, and correct in
1620 adjust_dynamic_symbol. */
1623 /* We may need a .plt entry if the function this reloc
1624 refers to is in a shared lib. */
1625 h
->plt
.refcount
+= 1;
1626 if (r_type
!= R_386_PC32
)
1627 h
->pointer_equality_needed
= 1;
1630 /* If we are creating a shared library, and this is a reloc
1631 against a global symbol, or a non PC relative reloc
1632 against a local symbol, then we need to copy the reloc
1633 into the shared library. However, if we are linking with
1634 -Bsymbolic, we do not need to copy a reloc against a
1635 global symbol which is defined in an object we are
1636 including in the link (i.e., DEF_REGULAR is set). At
1637 this point we have not seen all the input files, so it is
1638 possible that DEF_REGULAR is not set now but will be set
1639 later (it is never cleared). In case of a weak definition,
1640 DEF_REGULAR may be cleared later by a strong definition in
1641 a shared library. We account for that possibility below by
1642 storing information in the relocs_copied field of the hash
1643 table entry. A similar situation occurs when creating
1644 shared libraries and symbol visibility changes render the
1647 If on the other hand, we are creating an executable, we
1648 may need to keep relocations for symbols satisfied by a
1649 dynamic library if we manage to avoid copy relocs for the
1652 && (sec
->flags
& SEC_ALLOC
) != 0
1653 && (r_type
!= R_386_PC32
1655 && (! SYMBOLIC_BIND (info
, h
)
1656 || h
->root
.type
== bfd_link_hash_defweak
1657 || !h
->def_regular
))))
1658 || (ELIMINATE_COPY_RELOCS
1660 && (sec
->flags
& SEC_ALLOC
) != 0
1662 && (h
->root
.type
== bfd_link_hash_defweak
1663 || !h
->def_regular
)))
1665 struct elf_dyn_relocs
*p
;
1666 struct elf_dyn_relocs
**head
;
1668 /* We must copy these reloc types into the output file.
1669 Create a reloc section in dynobj and make room for
1673 if (htab
->elf
.dynobj
== NULL
)
1674 htab
->elf
.dynobj
= abfd
;
1676 sreloc
= _bfd_elf_make_dynamic_reloc_section
1677 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1683 /* If this is a global symbol, we count the number of
1684 relocations we need for this symbol. */
1687 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1691 /* Track dynamic relocs needed for local syms too.
1692 We really need local syms available to do this
1697 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1702 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1706 vpp
= &elf_section_data (s
)->local_dynrel
;
1707 head
= (struct elf_dyn_relocs
**)vpp
;
1711 if (p
== NULL
|| p
->sec
!= sec
)
1713 bfd_size_type amt
= sizeof *p
;
1714 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1726 if (r_type
== R_386_PC32
)
1731 /* This relocation describes the C++ object vtable hierarchy.
1732 Reconstruct it for later use during GC. */
1733 case R_386_GNU_VTINHERIT
:
1734 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1738 /* This relocation describes which C++ vtable entries are actually
1739 used. Record for later use during GC. */
1740 case R_386_GNU_VTENTRY
:
1741 BFD_ASSERT (h
!= NULL
);
1743 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1755 /* Return the section that should be marked against GC for a given
1759 elf_i386_gc_mark_hook (asection
*sec
,
1760 struct bfd_link_info
*info
,
1761 Elf_Internal_Rela
*rel
,
1762 struct elf_link_hash_entry
*h
,
1763 Elf_Internal_Sym
*sym
)
1766 switch (ELF32_R_TYPE (rel
->r_info
))
1768 case R_386_GNU_VTINHERIT
:
1769 case R_386_GNU_VTENTRY
:
1773 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1776 /* Update the got entry reference counts for the section being removed. */
1779 elf_i386_gc_sweep_hook (bfd
*abfd
,
1780 struct bfd_link_info
*info
,
1782 const Elf_Internal_Rela
*relocs
)
1784 struct elf_i386_link_hash_table
*htab
;
1785 Elf_Internal_Shdr
*symtab_hdr
;
1786 struct elf_link_hash_entry
**sym_hashes
;
1787 bfd_signed_vma
*local_got_refcounts
;
1788 const Elf_Internal_Rela
*rel
, *relend
;
1790 if (info
->relocatable
)
1793 htab
= elf_i386_hash_table (info
);
1797 elf_section_data (sec
)->local_dynrel
= NULL
;
1799 symtab_hdr
= &elf_symtab_hdr (abfd
);
1800 sym_hashes
= elf_sym_hashes (abfd
);
1801 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1803 relend
= relocs
+ sec
->reloc_count
;
1804 for (rel
= relocs
; rel
< relend
; rel
++)
1806 unsigned long r_symndx
;
1807 unsigned int r_type
;
1808 struct elf_link_hash_entry
*h
= NULL
;
1810 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1811 if (r_symndx
>= symtab_hdr
->sh_info
)
1813 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1814 while (h
->root
.type
== bfd_link_hash_indirect
1815 || h
->root
.type
== bfd_link_hash_warning
)
1816 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1820 /* A local symbol. */
1821 Elf_Internal_Sym
*isym
;
1823 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1826 /* Check relocation against local STT_GNU_IFUNC symbol. */
1828 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1830 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1838 struct elf_i386_link_hash_entry
*eh
;
1839 struct elf_dyn_relocs
**pp
;
1840 struct elf_dyn_relocs
*p
;
1842 eh
= (struct elf_i386_link_hash_entry
*) h
;
1843 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1846 /* Everything must go for SEC. */
1852 r_type
= ELF32_R_TYPE (rel
->r_info
);
1853 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1854 symtab_hdr
, sym_hashes
,
1855 &r_type
, GOT_UNKNOWN
,
1856 rel
, relend
, h
, r_symndx
))
1862 if (htab
->tls_ldm_got
.refcount
> 0)
1863 htab
->tls_ldm_got
.refcount
-= 1;
1867 case R_386_TLS_GOTDESC
:
1868 case R_386_TLS_DESC_CALL
:
1869 case R_386_TLS_IE_32
:
1871 case R_386_TLS_GOTIE
:
1875 if (h
->got
.refcount
> 0)
1876 h
->got
.refcount
-= 1;
1877 if (h
->type
== STT_GNU_IFUNC
)
1879 if (h
->plt
.refcount
> 0)
1880 h
->plt
.refcount
-= 1;
1883 else if (local_got_refcounts
!= NULL
)
1885 if (local_got_refcounts
[r_symndx
] > 0)
1886 local_got_refcounts
[r_symndx
] -= 1;
1893 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1900 if (h
->plt
.refcount
> 0)
1901 h
->plt
.refcount
-= 1;
1906 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
1908 if (h
->got
.refcount
> 0)
1909 h
->got
.refcount
-= 1;
1910 if (h
->plt
.refcount
> 0)
1911 h
->plt
.refcount
-= 1;
1923 /* Adjust a symbol defined by a dynamic object and referenced by a
1924 regular object. The current definition is in some section of the
1925 dynamic object, but we're not including those sections. We have to
1926 change the definition to something the rest of the link can
1930 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1931 struct elf_link_hash_entry
*h
)
1933 struct elf_i386_link_hash_table
*htab
;
1936 /* STT_GNU_IFUNC symbol must go through PLT. */
1937 if (h
->type
== STT_GNU_IFUNC
)
1939 if (h
->plt
.refcount
<= 0)
1941 h
->plt
.offset
= (bfd_vma
) -1;
1947 /* If this is a function, put it in the procedure linkage table. We
1948 will fill in the contents of the procedure linkage table later,
1949 when we know the address of the .got section. */
1950 if (h
->type
== STT_FUNC
1953 if (h
->plt
.refcount
<= 0
1954 || SYMBOL_CALLS_LOCAL (info
, h
)
1955 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1956 && h
->root
.type
== bfd_link_hash_undefweak
))
1958 /* This case can occur if we saw a PLT32 reloc in an input
1959 file, but the symbol was never referred to by a dynamic
1960 object, or if all references were garbage collected. In
1961 such a case, we don't actually need to build a procedure
1962 linkage table, and we can just do a PC32 reloc instead. */
1963 h
->plt
.offset
= (bfd_vma
) -1;
1970 /* It's possible that we incorrectly decided a .plt reloc was
1971 needed for an R_386_PC32 reloc to a non-function sym in
1972 check_relocs. We can't decide accurately between function and
1973 non-function syms in check-relocs; Objects loaded later in
1974 the link may change h->type. So fix it now. */
1975 h
->plt
.offset
= (bfd_vma
) -1;
1977 /* If this is a weak symbol, and there is a real definition, the
1978 processor independent code will have arranged for us to see the
1979 real definition first, and we can just use the same value. */
1980 if (h
->u
.weakdef
!= NULL
)
1982 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1983 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1984 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1985 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1986 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1987 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1991 /* This is a reference to a symbol defined by a dynamic object which
1992 is not a function. */
1994 /* If we are creating a shared library, we must presume that the
1995 only references to the symbol are via the global offset table.
1996 For such cases we need not do anything here; the relocations will
1997 be handled correctly by relocate_section. */
2001 /* If there are no references to this symbol that do not use the
2002 GOT, we don't need to generate a copy reloc. */
2003 if (!h
->non_got_ref
)
2006 /* If -z nocopyreloc was given, we won't generate them either. */
2007 if (info
->nocopyreloc
)
2013 htab
= elf_i386_hash_table (info
);
2017 /* If there aren't any dynamic relocs in read-only sections, then
2018 we can keep the dynamic relocs and avoid the copy reloc. This
2019 doesn't work on VxWorks, where we can not have dynamic relocations
2020 (other than copy and jump slot relocations) in an executable. */
2021 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
2023 struct elf_i386_link_hash_entry
* eh
;
2024 struct elf_dyn_relocs
*p
;
2026 eh
= (struct elf_i386_link_hash_entry
*) h
;
2027 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2029 s
= p
->sec
->output_section
;
2030 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2043 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
2044 h
->root
.root
.string
);
2048 /* We must allocate the symbol in our .dynbss section, which will
2049 become part of the .bss section of the executable. There will be
2050 an entry for this symbol in the .dynsym section. The dynamic
2051 object will contain position independent code, so all references
2052 from the dynamic object to this symbol will go through the global
2053 offset table. The dynamic linker will use the .dynsym entry to
2054 determine the address it must put in the global offset table, so
2055 both the dynamic object and the regular object will refer to the
2056 same memory location for the variable. */
2058 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2059 copy the initial value out of the dynamic object and into the
2060 runtime process image. */
2061 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
2063 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2069 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2072 /* Allocate space in .plt, .got and associated reloc sections for
2076 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2078 struct bfd_link_info
*info
;
2079 struct elf_i386_link_hash_table
*htab
;
2080 struct elf_i386_link_hash_entry
*eh
;
2081 struct elf_dyn_relocs
*p
;
2083 if (h
->root
.type
== bfd_link_hash_indirect
)
2086 if (h
->root
.type
== bfd_link_hash_warning
)
2087 /* When warning symbols are created, they **replace** the "real"
2088 entry in the hash table, thus we never get to see the real
2089 symbol in a hash traversal. So look at it now. */
2090 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2091 eh
= (struct elf_i386_link_hash_entry
*) h
;
2093 info
= (struct bfd_link_info
*) inf
;
2094 htab
= elf_i386_hash_table (info
);
2098 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2099 here if it is defined and referenced in a non-shared object. */
2100 if (h
->type
== STT_GNU_IFUNC
2102 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2105 else if (htab
->elf
.dynamic_sections_created
2106 && h
->plt
.refcount
> 0)
2108 /* Make sure this symbol is output as a dynamic symbol.
2109 Undefined weak syms won't yet be marked as dynamic. */
2110 if (h
->dynindx
== -1
2111 && !h
->forced_local
)
2113 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2118 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2120 asection
*s
= htab
->elf
.splt
;
2122 /* If this is the first .plt entry, make room for the special
2125 s
->size
+= PLT_ENTRY_SIZE
;
2127 h
->plt
.offset
= s
->size
;
2129 /* If this symbol is not defined in a regular file, and we are
2130 not generating a shared library, then set the symbol to this
2131 location in the .plt. This is required to make function
2132 pointers compare as equal between the normal executable and
2133 the shared library. */
2137 h
->root
.u
.def
.section
= s
;
2138 h
->root
.u
.def
.value
= h
->plt
.offset
;
2141 /* Make room for this entry. */
2142 s
->size
+= PLT_ENTRY_SIZE
;
2144 /* We also need to make an entry in the .got.plt section, which
2145 will be placed in the .got section by the linker script. */
2146 htab
->elf
.sgotplt
->size
+= 4;
2148 /* We also need to make an entry in the .rel.plt section. */
2149 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2150 htab
->next_tls_desc_index
++;
2152 if (htab
->is_vxworks
&& !info
->shared
)
2154 /* VxWorks has a second set of relocations for each PLT entry
2155 in executables. They go in a separate relocation section,
2156 which is processed by the kernel loader. */
2158 /* There are two relocations for the initial PLT entry: an
2159 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2160 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2162 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
2163 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2165 /* There are two extra relocations for each subsequent PLT entry:
2166 an R_386_32 relocation for the GOT entry, and an R_386_32
2167 relocation for the PLT entry. */
2169 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2174 h
->plt
.offset
= (bfd_vma
) -1;
2180 h
->plt
.offset
= (bfd_vma
) -1;
2184 eh
->tlsdesc_got
= (bfd_vma
) -1;
2186 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2187 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2188 if (h
->got
.refcount
> 0
2191 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2192 h
->got
.offset
= (bfd_vma
) -1;
2193 else if (h
->got
.refcount
> 0)
2197 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2199 /* Make sure this symbol is output as a dynamic symbol.
2200 Undefined weak syms won't yet be marked as dynamic. */
2201 if (h
->dynindx
== -1
2202 && !h
->forced_local
)
2204 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2209 if (GOT_TLS_GDESC_P (tls_type
))
2211 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2212 - elf_i386_compute_jump_table_size (htab
);
2213 htab
->elf
.sgotplt
->size
+= 8;
2214 h
->got
.offset
= (bfd_vma
) -2;
2216 if (! GOT_TLS_GDESC_P (tls_type
)
2217 || GOT_TLS_GD_P (tls_type
))
2219 h
->got
.offset
= s
->size
;
2221 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2222 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2225 dyn
= htab
->elf
.dynamic_sections_created
;
2226 /* R_386_TLS_IE_32 needs one dynamic relocation,
2227 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2228 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2229 need two), R_386_TLS_GD needs one if local symbol and two if
2231 if (tls_type
== GOT_TLS_IE_BOTH
)
2232 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2233 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2234 || (tls_type
& GOT_TLS_IE
))
2235 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2236 else if (GOT_TLS_GD_P (tls_type
))
2237 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2238 else if (! GOT_TLS_GDESC_P (tls_type
)
2239 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2240 || h
->root
.type
!= bfd_link_hash_undefweak
)
2242 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2243 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2244 if (GOT_TLS_GDESC_P (tls_type
))
2245 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2248 h
->got
.offset
= (bfd_vma
) -1;
2250 if (eh
->dyn_relocs
== NULL
)
2253 /* In the shared -Bsymbolic case, discard space allocated for
2254 dynamic pc-relative relocs against symbols which turn out to be
2255 defined in regular objects. For the normal shared case, discard
2256 space for pc-relative relocs that have become local due to symbol
2257 visibility changes. */
2261 /* The only reloc that uses pc_count is R_386_PC32, which will
2262 appear on a call or on something like ".long foo - .". We
2263 want calls to protected symbols to resolve directly to the
2264 function rather than going via the plt. If people want
2265 function pointer comparisons to work as expected then they
2266 should avoid writing assembly like ".long foo - .". */
2267 if (SYMBOL_CALLS_LOCAL (info
, h
))
2269 struct elf_dyn_relocs
**pp
;
2271 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2273 p
->count
-= p
->pc_count
;
2282 if (htab
->is_vxworks
)
2284 struct elf_dyn_relocs
**pp
;
2285 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2287 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2294 /* Also discard relocs on undefined weak syms with non-default
2296 if (eh
->dyn_relocs
!= NULL
2297 && h
->root
.type
== bfd_link_hash_undefweak
)
2299 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2300 eh
->dyn_relocs
= NULL
;
2302 /* Make sure undefined weak symbols are output as a dynamic
2304 else if (h
->dynindx
== -1
2305 && !h
->forced_local
)
2307 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2312 else if (ELIMINATE_COPY_RELOCS
)
2314 /* For the non-shared case, discard space for relocs against
2315 symbols which turn out to need copy relocs or are not
2321 || (htab
->elf
.dynamic_sections_created
2322 && (h
->root
.type
== bfd_link_hash_undefweak
2323 || h
->root
.type
== bfd_link_hash_undefined
))))
2325 /* Make sure this symbol is output as a dynamic symbol.
2326 Undefined weak syms won't yet be marked as dynamic. */
2327 if (h
->dynindx
== -1
2328 && !h
->forced_local
)
2330 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2334 /* If that succeeded, we know we'll be keeping all the
2336 if (h
->dynindx
!= -1)
2340 eh
->dyn_relocs
= NULL
;
2345 /* Finally, allocate space. */
2346 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2350 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2352 BFD_ASSERT (sreloc
!= NULL
);
2353 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2359 /* Allocate space in .plt, .got and associated reloc sections for
2360 local dynamic relocs. */
2363 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2365 struct elf_link_hash_entry
*h
2366 = (struct elf_link_hash_entry
*) *slot
;
2368 if (h
->type
!= STT_GNU_IFUNC
2372 || h
->root
.type
!= bfd_link_hash_defined
)
2375 return elf_i386_allocate_dynrelocs (h
, inf
);
2378 /* Find any dynamic relocs that apply to read-only sections. */
2381 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2383 struct elf_i386_link_hash_entry
*eh
;
2384 struct elf_dyn_relocs
*p
;
2386 if (h
->root
.type
== bfd_link_hash_warning
)
2387 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2389 /* Skip local IFUNC symbols. */
2390 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2393 eh
= (struct elf_i386_link_hash_entry
*) h
;
2394 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2396 asection
*s
= p
->sec
->output_section
;
2398 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2400 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2402 info
->flags
|= DF_TEXTREL
;
2404 if (info
->warn_shared_textrel
&& info
->shared
)
2405 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2406 p
->sec
->owner
, h
->root
.root
.string
,
2409 /* Not an error, just cut short the traversal. */
2416 /* Set the sizes of the dynamic sections. */
2419 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2420 struct bfd_link_info
*info
)
2422 struct elf_i386_link_hash_table
*htab
;
2428 htab
= elf_i386_hash_table (info
);
2431 dynobj
= htab
->elf
.dynobj
;
2435 if (htab
->elf
.dynamic_sections_created
)
2437 /* Set the contents of the .interp section to the interpreter. */
2438 if (info
->executable
)
2440 s
= bfd_get_section_by_name (dynobj
, ".interp");
2443 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2444 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2448 /* Set up .got offsets for local syms, and space for local dynamic
2450 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2452 bfd_signed_vma
*local_got
;
2453 bfd_signed_vma
*end_local_got
;
2454 char *local_tls_type
;
2455 bfd_vma
*local_tlsdesc_gotent
;
2456 bfd_size_type locsymcount
;
2457 Elf_Internal_Shdr
*symtab_hdr
;
2460 if (! is_i386_elf (ibfd
))
2463 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2465 struct elf_dyn_relocs
*p
;
2467 for (p
= ((struct elf_dyn_relocs
*)
2468 elf_section_data (s
)->local_dynrel
);
2472 if (!bfd_is_abs_section (p
->sec
)
2473 && bfd_is_abs_section (p
->sec
->output_section
))
2475 /* Input section has been discarded, either because
2476 it is a copy of a linkonce section or due to
2477 linker script /DISCARD/, so we'll be discarding
2480 else if (htab
->is_vxworks
2481 && strcmp (p
->sec
->output_section
->name
,
2484 /* Relocations in vxworks .tls_vars sections are
2485 handled specially by the loader. */
2487 else if (p
->count
!= 0)
2489 srel
= elf_section_data (p
->sec
)->sreloc
;
2490 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2491 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2493 info
->flags
|= DF_TEXTREL
;
2494 if (info
->warn_shared_textrel
&& info
->shared
)
2495 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2496 p
->sec
->owner
, p
->sec
);
2503 local_got
= elf_local_got_refcounts (ibfd
);
2507 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2508 locsymcount
= symtab_hdr
->sh_info
;
2509 end_local_got
= local_got
+ locsymcount
;
2510 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2511 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2513 srel
= htab
->elf
.srelgot
;
2514 for (; local_got
< end_local_got
;
2515 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2517 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2520 if (GOT_TLS_GDESC_P (*local_tls_type
))
2522 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2523 - elf_i386_compute_jump_table_size (htab
);
2524 htab
->elf
.sgotplt
->size
+= 8;
2525 *local_got
= (bfd_vma
) -2;
2527 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2528 || GOT_TLS_GD_P (*local_tls_type
))
2530 *local_got
= s
->size
;
2532 if (GOT_TLS_GD_P (*local_tls_type
)
2533 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2537 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2538 || (*local_tls_type
& GOT_TLS_IE
))
2540 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2541 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2542 else if (GOT_TLS_GD_P (*local_tls_type
)
2543 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2544 srel
->size
+= sizeof (Elf32_External_Rel
);
2545 if (GOT_TLS_GDESC_P (*local_tls_type
))
2546 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2550 *local_got
= (bfd_vma
) -1;
2554 if (htab
->tls_ldm_got
.refcount
> 0)
2556 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2558 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2559 htab
->elf
.sgot
->size
+= 8;
2560 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2563 htab
->tls_ldm_got
.offset
= -1;
2565 /* Allocate global sym .plt and .got entries, and space for global
2566 sym dynamic relocs. */
2567 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2569 /* Allocate .plt and .got entries, and space for local symbols. */
2570 htab_traverse (htab
->loc_hash_table
,
2571 elf_i386_allocate_local_dynrelocs
,
2574 /* For every jump slot reserved in the sgotplt, reloc_count is
2575 incremented. However, when we reserve space for TLS descriptors,
2576 it's not incremented, so in order to compute the space reserved
2577 for them, it suffices to multiply the reloc count by the jump
2579 if (htab
->elf
.srelplt
)
2580 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2582 if (htab
->elf
.sgotplt
)
2584 struct elf_link_hash_entry
*got
;
2585 got
= elf_link_hash_lookup (elf_hash_table (info
),
2586 "_GLOBAL_OFFSET_TABLE_",
2587 FALSE
, FALSE
, FALSE
);
2589 /* Don't allocate .got.plt section if there are no GOT nor PLT
2590 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2592 || !got
->ref_regular_nonweak
)
2593 && (htab
->elf
.sgotplt
->size
2594 == get_elf_backend_data (output_bfd
)->got_header_size
)
2595 && (htab
->elf
.splt
== NULL
2596 || htab
->elf
.splt
->size
== 0)
2597 && (htab
->elf
.sgot
== NULL
2598 || htab
->elf
.sgot
->size
== 0)
2599 && (htab
->elf
.iplt
== NULL
2600 || htab
->elf
.iplt
->size
== 0)
2601 && (htab
->elf
.igotplt
== NULL
2602 || htab
->elf
.igotplt
->size
== 0))
2603 htab
->elf
.sgotplt
->size
= 0;
2606 /* We now have determined the sizes of the various dynamic sections.
2607 Allocate memory for them. */
2609 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2611 bfd_boolean strip_section
= TRUE
;
2613 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2616 if (s
== htab
->elf
.splt
2617 || s
== htab
->elf
.sgot
2618 || s
== htab
->elf
.sgotplt
2619 || s
== htab
->elf
.iplt
2620 || s
== htab
->elf
.igotplt
2621 || s
== htab
->sdynbss
)
2623 /* Strip this section if we don't need it; see the
2625 /* We'd like to strip these sections if they aren't needed, but if
2626 we've exported dynamic symbols from them we must leave them.
2627 It's too late to tell BFD to get rid of the symbols. */
2629 if (htab
->elf
.hplt
!= NULL
)
2630 strip_section
= FALSE
;
2632 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2635 && s
!= htab
->elf
.srelplt
2636 && s
!= htab
->srelplt2
)
2639 /* We use the reloc_count field as a counter if we need
2640 to copy relocs into the output file. */
2645 /* It's not one of our sections, so don't allocate space. */
2651 /* If we don't need this section, strip it from the
2652 output file. This is mostly to handle .rel.bss and
2653 .rel.plt. We must create both sections in
2654 create_dynamic_sections, because they must be created
2655 before the linker maps input sections to output
2656 sections. The linker does that before
2657 adjust_dynamic_symbol is called, and it is that
2658 function which decides whether anything needs to go
2659 into these sections. */
2661 s
->flags
|= SEC_EXCLUDE
;
2665 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2668 /* Allocate memory for the section contents. We use bfd_zalloc
2669 here in case unused entries are not reclaimed before the
2670 section's contents are written out. This should not happen,
2671 but this way if it does, we get a R_386_NONE reloc instead
2673 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2674 if (s
->contents
== NULL
)
2678 if (htab
->elf
.dynamic_sections_created
)
2680 /* Add some entries to the .dynamic section. We fill in the
2681 values later, in elf_i386_finish_dynamic_sections, but we
2682 must add the entries now so that we get the correct size for
2683 the .dynamic section. The DT_DEBUG entry is filled in by the
2684 dynamic linker and used by the debugger. */
2685 #define add_dynamic_entry(TAG, VAL) \
2686 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2688 if (info
->executable
)
2690 if (!add_dynamic_entry (DT_DEBUG
, 0))
2694 if (htab
->elf
.splt
->size
!= 0)
2696 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2697 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2698 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2699 || !add_dynamic_entry (DT_JMPREL
, 0))
2705 if (!add_dynamic_entry (DT_REL
, 0)
2706 || !add_dynamic_entry (DT_RELSZ
, 0)
2707 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2710 /* If any dynamic relocs apply to a read-only section,
2711 then we need a DT_TEXTREL entry. */
2712 if ((info
->flags
& DF_TEXTREL
) == 0)
2713 elf_link_hash_traverse (&htab
->elf
,
2714 elf_i386_readonly_dynrelocs
, info
);
2716 if ((info
->flags
& DF_TEXTREL
) != 0)
2718 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2722 if (htab
->is_vxworks
2723 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2726 #undef add_dynamic_entry
2732 elf_i386_always_size_sections (bfd
*output_bfd
,
2733 struct bfd_link_info
*info
)
2735 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2739 struct elf_link_hash_entry
*tlsbase
;
2741 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2742 "_TLS_MODULE_BASE_",
2743 FALSE
, FALSE
, FALSE
);
2745 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2747 struct elf_i386_link_hash_table
*htab
;
2748 struct bfd_link_hash_entry
*bh
= NULL
;
2749 const struct elf_backend_data
*bed
2750 = get_elf_backend_data (output_bfd
);
2752 htab
= elf_i386_hash_table (info
);
2756 if (!(_bfd_generic_link_add_one_symbol
2757 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2758 tls_sec
, 0, NULL
, FALSE
,
2759 bed
->collect
, &bh
)))
2762 htab
->tls_module_base
= bh
;
2764 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2765 tlsbase
->def_regular
= 1;
2766 tlsbase
->other
= STV_HIDDEN
;
2767 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2774 /* Set the correct type for an x86 ELF section. We do this by the
2775 section name, which is a hack, but ought to work. */
2778 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2779 Elf_Internal_Shdr
*hdr
,
2784 name
= bfd_get_section_name (abfd
, sec
);
2786 /* This is an ugly, but unfortunately necessary hack that is
2787 needed when producing EFI binaries on x86. It tells
2788 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2789 containing ELF relocation info. We need this hack in order to
2790 be able to generate ELF binaries that can be translated into
2791 EFI applications (which are essentially COFF objects). Those
2792 files contain a COFF ".reloc" section inside an ELFNN object,
2793 which would normally cause BFD to segfault because it would
2794 attempt to interpret this section as containing relocation
2795 entries for section "oc". With this hack enabled, ".reloc"
2796 will be treated as a normal data section, which will avoid the
2797 segfault. However, you won't be able to create an ELFNN binary
2798 with a section named "oc" that needs relocations, but that's
2799 the kind of ugly side-effects you get when detecting section
2800 types based on their names... In practice, this limitation is
2801 unlikely to bite. */
2802 if (strcmp (name
, ".reloc") == 0)
2803 hdr
->sh_type
= SHT_PROGBITS
;
2808 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2809 executables. Rather than setting it to the beginning of the TLS
2810 section, we have to set it to the end. This function may be called
2811 multiple times, it is idempotent. */
2814 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2816 struct elf_i386_link_hash_table
*htab
;
2817 struct bfd_link_hash_entry
*base
;
2819 if (!info
->executable
)
2822 htab
= elf_i386_hash_table (info
);
2826 base
= htab
->tls_module_base
;
2830 base
->u
.def
.value
= htab
->elf
.tls_size
;
2833 /* Return the base VMA address which should be subtracted from real addresses
2834 when resolving @dtpoff relocation.
2835 This is PT_TLS segment p_vaddr. */
2838 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2840 /* If tls_sec is NULL, we should have signalled an error already. */
2841 if (elf_hash_table (info
)->tls_sec
== NULL
)
2843 return elf_hash_table (info
)->tls_sec
->vma
;
2846 /* Return the relocation value for @tpoff relocation
2847 if STT_TLS virtual address is ADDRESS. */
2850 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2852 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2853 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
2854 bfd_vma static_tls_size
;
2856 /* If tls_sec is NULL, we should have signalled an error already. */
2857 if (htab
->tls_sec
== NULL
)
2860 /* Consider special static TLS alignment requirements. */
2861 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
2862 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
2865 /* Relocate an i386 ELF section. */
2868 elf_i386_relocate_section (bfd
*output_bfd
,
2869 struct bfd_link_info
*info
,
2871 asection
*input_section
,
2873 Elf_Internal_Rela
*relocs
,
2874 Elf_Internal_Sym
*local_syms
,
2875 asection
**local_sections
)
2877 struct elf_i386_link_hash_table
*htab
;
2878 Elf_Internal_Shdr
*symtab_hdr
;
2879 struct elf_link_hash_entry
**sym_hashes
;
2880 bfd_vma
*local_got_offsets
;
2881 bfd_vma
*local_tlsdesc_gotents
;
2882 Elf_Internal_Rela
*rel
;
2883 Elf_Internal_Rela
*relend
;
2884 bfd_boolean is_vxworks_tls
;
2886 BFD_ASSERT (is_i386_elf (input_bfd
));
2888 htab
= elf_i386_hash_table (info
);
2891 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2892 sym_hashes
= elf_sym_hashes (input_bfd
);
2893 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2894 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2895 /* We have to handle relocations in vxworks .tls_vars sections
2896 specially, because the dynamic loader is 'weird'. */
2897 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2898 && !strcmp (input_section
->output_section
->name
,
2901 elf_i386_set_tls_module_base (info
);
2904 relend
= relocs
+ input_section
->reloc_count
;
2905 for (; rel
< relend
; rel
++)
2907 unsigned int r_type
;
2908 reloc_howto_type
*howto
;
2909 unsigned long r_symndx
;
2910 struct elf_link_hash_entry
*h
;
2911 Elf_Internal_Sym
*sym
;
2913 bfd_vma off
, offplt
;
2915 bfd_boolean unresolved_reloc
;
2916 bfd_reloc_status_type r
;
2920 r_type
= ELF32_R_TYPE (rel
->r_info
);
2921 if (r_type
== R_386_GNU_VTINHERIT
2922 || r_type
== R_386_GNU_VTENTRY
)
2925 if ((indx
= r_type
) >= R_386_standard
2926 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2927 >= R_386_ext
- R_386_standard
)
2928 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2929 >= R_386_irelative
- R_386_ext
))
2931 (*_bfd_error_handler
)
2932 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2933 input_bfd
, input_section
, r_type
);
2934 bfd_set_error (bfd_error_bad_value
);
2937 howto
= elf_howto_table
+ indx
;
2939 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2943 unresolved_reloc
= FALSE
;
2944 if (r_symndx
< symtab_hdr
->sh_info
)
2946 sym
= local_syms
+ r_symndx
;
2947 sec
= local_sections
[r_symndx
];
2948 relocation
= (sec
->output_section
->vma
2949 + sec
->output_offset
2952 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2953 && ((sec
->flags
& SEC_MERGE
) != 0
2954 || (info
->relocatable
2955 && sec
->output_offset
!= 0)))
2958 bfd_byte
*where
= contents
+ rel
->r_offset
;
2960 switch (howto
->size
)
2963 addend
= bfd_get_8 (input_bfd
, where
);
2964 if (howto
->pc_relative
)
2966 addend
= (addend
^ 0x80) - 0x80;
2971 addend
= bfd_get_16 (input_bfd
, where
);
2972 if (howto
->pc_relative
)
2974 addend
= (addend
^ 0x8000) - 0x8000;
2979 addend
= bfd_get_32 (input_bfd
, where
);
2980 if (howto
->pc_relative
)
2982 addend
= (addend
^ 0x80000000) - 0x80000000;
2990 if (info
->relocatable
)
2991 addend
+= sec
->output_offset
;
2994 asection
*msec
= sec
;
2995 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2997 addend
-= relocation
;
2998 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3001 switch (howto
->size
)
3004 /* FIXME: overflow checks. */
3005 if (howto
->pc_relative
)
3007 bfd_put_8 (input_bfd
, addend
, where
);
3010 if (howto
->pc_relative
)
3012 bfd_put_16 (input_bfd
, addend
, where
);
3015 if (howto
->pc_relative
)
3017 bfd_put_32 (input_bfd
, addend
, where
);
3021 else if (!info
->relocatable
3022 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3024 /* Relocate against local STT_GNU_IFUNC symbol. */
3025 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3030 /* Set STT_GNU_IFUNC symbol value. */
3031 h
->root
.u
.def
.value
= sym
->st_value
;
3032 h
->root
.u
.def
.section
= sec
;
3037 bfd_boolean warned ATTRIBUTE_UNUSED
;
3039 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3040 r_symndx
, symtab_hdr
, sym_hashes
,
3042 unresolved_reloc
, warned
);
3045 if (sec
!= NULL
&& elf_discarded_section (sec
))
3046 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3047 rel
, relend
, howto
, contents
);
3049 if (info
->relocatable
)
3052 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3053 it here if it is defined in a non-shared object. */
3055 && h
->type
== STT_GNU_IFUNC
3058 asection
*plt
, *gotplt
, *base_got
;
3062 if ((input_section
->flags
& SEC_ALLOC
) == 0
3063 || h
->plt
.offset
== (bfd_vma
) -1)
3066 /* STT_GNU_IFUNC symbol must go through PLT. */
3067 if (htab
->elf
.splt
!= NULL
)
3069 plt
= htab
->elf
.splt
;
3070 gotplt
= htab
->elf
.sgotplt
;
3074 plt
= htab
->elf
.iplt
;
3075 gotplt
= htab
->elf
.igotplt
;
3078 relocation
= (plt
->output_section
->vma
3079 + plt
->output_offset
+ h
->plt
.offset
);
3084 if (h
->root
.root
.string
)
3085 name
= h
->root
.root
.string
;
3087 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3089 (*_bfd_error_handler
)
3090 (_("%B: relocation %s against STT_GNU_IFUNC "
3091 "symbol `%s' isn't handled by %s"), input_bfd
,
3092 elf_howto_table
[r_type
].name
,
3093 name
, __FUNCTION__
);
3094 bfd_set_error (bfd_error_bad_value
);
3098 /* Generate dynamic relcoation only when there is a
3099 non-GOF reference in a shared object. */
3100 if (info
->shared
&& h
->non_got_ref
)
3102 Elf_Internal_Rela outrel
;
3107 /* Need a dynamic relocation to get the real function
3109 offset
= _bfd_elf_section_offset (output_bfd
,
3113 if (offset
== (bfd_vma
) -1
3114 || offset
== (bfd_vma
) -2)
3117 outrel
.r_offset
= (input_section
->output_section
->vma
3118 + input_section
->output_offset
3121 if (h
->dynindx
== -1
3123 || info
->executable
)
3125 /* This symbol is resolved locally. */
3126 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3127 bfd_put_32 (output_bfd
,
3128 (h
->root
.u
.def
.value
3129 + h
->root
.u
.def
.section
->output_section
->vma
3130 + h
->root
.u
.def
.section
->output_offset
),
3134 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3136 sreloc
= htab
->elf
.irelifunc
;
3137 loc
= sreloc
->contents
;
3138 loc
+= (sreloc
->reloc_count
++
3139 * sizeof (Elf32_External_Rel
));
3140 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3142 /* If this reloc is against an external symbol, we
3143 do not want to fiddle with the addend. Otherwise,
3144 we need to include the symbol value so that it
3145 becomes an addend for the dynamic reloc. For an
3146 internal symbol, we have updated addend. */
3155 base_got
= htab
->elf
.sgot
;
3156 off
= h
->got
.offset
;
3158 if (base_got
== NULL
)
3161 if (off
== (bfd_vma
) -1)
3163 /* We can't use h->got.offset here to save state, or
3164 even just remember the offset, as finish_dynamic_symbol
3165 would use that as offset into .got. */
3167 if (htab
->elf
.splt
!= NULL
)
3169 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3170 off
= (plt_index
+ 3) * 4;
3171 base_got
= htab
->elf
.sgotplt
;
3175 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3176 off
= plt_index
* 4;
3177 base_got
= htab
->elf
.igotplt
;
3180 if (h
->dynindx
== -1
3184 /* This references the local defitionion. We must
3185 initialize this entry in the global offset table.
3186 Since the offset must always be a multiple of 8,
3187 we use the least significant bit to record
3188 whether we have initialized it already.
3190 When doing a dynamic link, we create a .rela.got
3191 relocation entry to initialize the value. This
3192 is done in the finish_dynamic_symbol routine. */
3197 bfd_put_32 (output_bfd
, relocation
,
3198 base_got
->contents
+ off
);
3205 /* Adjust for static executables. */
3206 if (htab
->elf
.splt
== NULL
)
3207 relocation
+= gotplt
->output_offset
;
3211 relocation
= (base_got
->output_section
->vma
3212 + base_got
->output_offset
+ off
3213 - gotplt
->output_section
->vma
3214 - gotplt
->output_offset
);
3215 /* Adjust for static executables. */
3216 if (htab
->elf
.splt
== NULL
)
3217 relocation
+= gotplt
->output_offset
;
3223 relocation
-= (gotplt
->output_section
->vma
3224 + gotplt
->output_offset
);
3232 /* Relocation is to the entry for this symbol in the global
3234 if (htab
->elf
.sgot
== NULL
)
3241 off
= h
->got
.offset
;
3242 dyn
= htab
->elf
.dynamic_sections_created
;
3243 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3245 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3246 || (ELF_ST_VISIBILITY (h
->other
)
3247 && h
->root
.type
== bfd_link_hash_undefweak
))
3249 /* This is actually a static link, or it is a
3250 -Bsymbolic link and the symbol is defined
3251 locally, or the symbol was forced to be local
3252 because of a version file. We must initialize
3253 this entry in the global offset table. Since the
3254 offset must always be a multiple of 4, we use the
3255 least significant bit to record whether we have
3256 initialized it already.
3258 When doing a dynamic link, we create a .rel.got
3259 relocation entry to initialize the value. This
3260 is done in the finish_dynamic_symbol routine. */
3265 bfd_put_32 (output_bfd
, relocation
,
3266 htab
->elf
.sgot
->contents
+ off
);
3271 unresolved_reloc
= FALSE
;
3275 if (local_got_offsets
== NULL
)
3278 off
= local_got_offsets
[r_symndx
];
3280 /* The offset must always be a multiple of 4. We use
3281 the least significant bit to record whether we have
3282 already generated the necessary reloc. */
3287 bfd_put_32 (output_bfd
, relocation
,
3288 htab
->elf
.sgot
->contents
+ off
);
3293 Elf_Internal_Rela outrel
;
3296 s
= htab
->elf
.srelgot
;
3300 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3301 + htab
->elf
.sgot
->output_offset
3303 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3305 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3306 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3309 local_got_offsets
[r_symndx
] |= 1;
3313 if (off
>= (bfd_vma
) -2)
3316 relocation
= htab
->elf
.sgot
->output_section
->vma
3317 + htab
->elf
.sgot
->output_offset
+ off
3318 - htab
->elf
.sgotplt
->output_section
->vma
3319 - htab
->elf
.sgotplt
->output_offset
;
3323 /* Relocation is relative to the start of the global offset
3326 /* Check to make sure it isn't a protected function symbol
3327 for shared library since it may not be local when used
3328 as function address. We also need to make sure that a
3329 symbol is defined locally. */
3330 if (info
->shared
&& h
)
3332 if (!h
->def_regular
)
3336 switch (ELF_ST_VISIBILITY (h
->other
))
3339 v
= _("hidden symbol");
3342 v
= _("internal symbol");
3345 v
= _("protected symbol");
3352 (*_bfd_error_handler
)
3353 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3354 input_bfd
, v
, h
->root
.root
.string
);
3355 bfd_set_error (bfd_error_bad_value
);
3358 else if (!info
->executable
3359 && h
->type
== STT_FUNC
3360 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3362 (*_bfd_error_handler
)
3363 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3364 input_bfd
, h
->root
.root
.string
);
3365 bfd_set_error (bfd_error_bad_value
);
3370 /* Note that sgot is not involved in this
3371 calculation. We always want the start of .got.plt. If we
3372 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3373 permitted by the ABI, we might have to change this
3375 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3376 + htab
->elf
.sgotplt
->output_offset
;
3380 /* Use global offset table as symbol value. */
3381 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3382 + htab
->elf
.sgotplt
->output_offset
;
3383 unresolved_reloc
= FALSE
;
3387 /* Relocation is to the entry for this symbol in the
3388 procedure linkage table. */
3390 /* Resolve a PLT32 reloc against a local symbol directly,
3391 without using the procedure linkage table. */
3395 if (h
->plt
.offset
== (bfd_vma
) -1
3396 || htab
->elf
.splt
== NULL
)
3398 /* We didn't make a PLT entry for this symbol. This
3399 happens when statically linking PIC code, or when
3400 using -Bsymbolic. */
3404 relocation
= (htab
->elf
.splt
->output_section
->vma
3405 + htab
->elf
.splt
->output_offset
3407 unresolved_reloc
= FALSE
;
3412 if ((input_section
->flags
& SEC_ALLOC
) == 0
3418 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3419 || h
->root
.type
!= bfd_link_hash_undefweak
)
3420 && (r_type
!= R_386_PC32
3421 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3422 || (ELIMINATE_COPY_RELOCS
3429 || h
->root
.type
== bfd_link_hash_undefweak
3430 || h
->root
.type
== bfd_link_hash_undefined
)))
3432 Elf_Internal_Rela outrel
;
3434 bfd_boolean skip
, relocate
;
3437 /* When generating a shared object, these relocations
3438 are copied into the output file to be resolved at run
3445 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3447 if (outrel
.r_offset
== (bfd_vma
) -1)
3449 else if (outrel
.r_offset
== (bfd_vma
) -2)
3450 skip
= TRUE
, relocate
= TRUE
;
3451 outrel
.r_offset
+= (input_section
->output_section
->vma
3452 + input_section
->output_offset
);
3455 memset (&outrel
, 0, sizeof outrel
);
3458 && (r_type
== R_386_PC32
3460 || !SYMBOLIC_BIND (info
, h
)
3461 || !h
->def_regular
))
3462 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3465 /* This symbol is local, or marked to become local. */
3467 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3470 sreloc
= elf_section_data (input_section
)->sreloc
;
3472 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3474 r
= bfd_reloc_notsupported
;
3475 goto check_relocation_error
;
3478 loc
= sreloc
->contents
;
3479 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3481 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3483 /* If this reloc is against an external symbol, we do
3484 not want to fiddle with the addend. Otherwise, we
3485 need to include the symbol value so that it becomes
3486 an addend for the dynamic reloc. */
3493 if (!info
->executable
)
3495 Elf_Internal_Rela outrel
;
3499 outrel
.r_offset
= rel
->r_offset
3500 + input_section
->output_section
->vma
3501 + input_section
->output_offset
;
3502 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3503 sreloc
= elf_section_data (input_section
)->sreloc
;
3506 loc
= sreloc
->contents
;
3507 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3508 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3513 case R_386_TLS_GOTDESC
:
3514 case R_386_TLS_DESC_CALL
:
3515 case R_386_TLS_IE_32
:
3516 case R_386_TLS_GOTIE
:
3517 tls_type
= GOT_UNKNOWN
;
3518 if (h
== NULL
&& local_got_offsets
)
3519 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3521 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3522 if (tls_type
== GOT_TLS_IE
)
3523 tls_type
= GOT_TLS_IE_NEG
;
3525 if (! elf_i386_tls_transition (info
, input_bfd
,
3526 input_section
, contents
,
3527 symtab_hdr
, sym_hashes
,
3528 &r_type
, tls_type
, rel
,
3529 relend
, h
, r_symndx
))
3532 if (r_type
== R_386_TLS_LE_32
)
3534 BFD_ASSERT (! unresolved_reloc
);
3535 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3540 /* GD->LE transition. */
3541 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3544 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3546 movl %gs:0, %eax; subl $foo@tpoff, %eax
3547 (6 byte form of subl). */
3548 memcpy (contents
+ rel
->r_offset
- 3,
3549 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3550 roff
= rel
->r_offset
+ 5;
3554 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3556 movl %gs:0, %eax; subl $foo@tpoff, %eax
3557 (6 byte form of subl). */
3558 memcpy (contents
+ rel
->r_offset
- 2,
3559 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3560 roff
= rel
->r_offset
+ 6;
3562 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3564 /* Skip R_386_PC32/R_386_PLT32. */
3568 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3570 /* GDesc -> LE transition.
3571 It's originally something like:
3572 leal x@tlsdesc(%ebx), %eax
3576 Registers other than %eax may be set up here. */
3581 roff
= rel
->r_offset
;
3582 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3584 /* Now modify the instruction as appropriate. */
3585 /* aoliva FIXME: remove the above and xor the byte
3587 bfd_put_8 (output_bfd
, val
^ 0x86,
3588 contents
+ roff
- 1);
3589 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3593 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3595 /* GDesc -> LE transition.
3603 roff
= rel
->r_offset
;
3604 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3605 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3608 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3612 /* IE->LE transition:
3613 Originally it can be one of:
3621 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3624 /* movl foo, %eax. */
3625 bfd_put_8 (output_bfd
, 0xb8,
3626 contents
+ rel
->r_offset
- 1);
3632 type
= bfd_get_8 (input_bfd
,
3633 contents
+ rel
->r_offset
- 2);
3638 bfd_put_8 (output_bfd
, 0xc7,
3639 contents
+ rel
->r_offset
- 2);
3640 bfd_put_8 (output_bfd
,
3641 0xc0 | ((val
>> 3) & 7),
3642 contents
+ rel
->r_offset
- 1);
3646 bfd_put_8 (output_bfd
, 0x81,
3647 contents
+ rel
->r_offset
- 2);
3648 bfd_put_8 (output_bfd
,
3649 0xc0 | ((val
>> 3) & 7),
3650 contents
+ rel
->r_offset
- 1);
3657 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3658 contents
+ rel
->r_offset
);
3663 unsigned int val
, type
;
3665 /* {IE_32,GOTIE}->LE transition:
3666 Originally it can be one of:
3667 subl foo(%reg1), %reg2
3668 movl foo(%reg1), %reg2
3669 addl foo(%reg1), %reg2
3672 movl $foo, %reg2 (6 byte form)
3673 addl $foo, %reg2. */
3674 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3675 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3679 bfd_put_8 (output_bfd
, 0xc7,
3680 contents
+ rel
->r_offset
- 2);
3681 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3682 contents
+ rel
->r_offset
- 1);
3684 else if (type
== 0x2b)
3687 bfd_put_8 (output_bfd
, 0x81,
3688 contents
+ rel
->r_offset
- 2);
3689 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3690 contents
+ rel
->r_offset
- 1);
3692 else if (type
== 0x03)
3695 bfd_put_8 (output_bfd
, 0x81,
3696 contents
+ rel
->r_offset
- 2);
3697 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3698 contents
+ rel
->r_offset
- 1);
3702 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3703 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3704 contents
+ rel
->r_offset
);
3706 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3707 contents
+ rel
->r_offset
);
3712 if (htab
->elf
.sgot
== NULL
)
3717 off
= h
->got
.offset
;
3718 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3722 if (local_got_offsets
== NULL
)
3725 off
= local_got_offsets
[r_symndx
];
3726 offplt
= local_tlsdesc_gotents
[r_symndx
];
3733 Elf_Internal_Rela outrel
;
3738 if (htab
->elf
.srelgot
== NULL
)
3741 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3743 if (GOT_TLS_GDESC_P (tls_type
))
3745 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3746 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3747 <= htab
->elf
.sgotplt
->size
);
3748 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3749 + htab
->elf
.sgotplt
->output_offset
3751 + htab
->sgotplt_jump_table_size
);
3752 sreloc
= htab
->elf
.srelplt
;
3753 loc
= sreloc
->contents
;
3754 loc
+= (htab
->next_tls_desc_index
++
3755 * sizeof (Elf32_External_Rel
));
3756 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3757 <= sreloc
->contents
+ sreloc
->size
);
3758 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3761 BFD_ASSERT (! unresolved_reloc
);
3762 bfd_put_32 (output_bfd
,
3763 relocation
- elf_i386_dtpoff_base (info
),
3764 htab
->elf
.sgotplt
->contents
+ offplt
3765 + htab
->sgotplt_jump_table_size
+ 4);
3769 bfd_put_32 (output_bfd
, 0,
3770 htab
->elf
.sgotplt
->contents
+ offplt
3771 + htab
->sgotplt_jump_table_size
+ 4);
3775 sreloc
= htab
->elf
.srelgot
;
3777 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3778 + htab
->elf
.sgot
->output_offset
+ off
);
3780 if (GOT_TLS_GD_P (tls_type
))
3781 dr_type
= R_386_TLS_DTPMOD32
;
3782 else if (GOT_TLS_GDESC_P (tls_type
))
3784 else if (tls_type
== GOT_TLS_IE_POS
)
3785 dr_type
= R_386_TLS_TPOFF
;
3787 dr_type
= R_386_TLS_TPOFF32
;
3789 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3790 bfd_put_32 (output_bfd
,
3791 relocation
- elf_i386_dtpoff_base (info
),
3792 htab
->elf
.sgot
->contents
+ off
);
3793 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3794 bfd_put_32 (output_bfd
,
3795 elf_i386_dtpoff_base (info
) - relocation
,
3796 htab
->elf
.sgot
->contents
+ off
);
3797 else if (dr_type
!= R_386_TLS_DESC
)
3798 bfd_put_32 (output_bfd
, 0,
3799 htab
->elf
.sgot
->contents
+ off
);
3800 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3802 loc
= sreloc
->contents
;
3803 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3804 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3805 <= sreloc
->contents
+ sreloc
->size
);
3806 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3808 if (GOT_TLS_GD_P (tls_type
))
3812 BFD_ASSERT (! unresolved_reloc
);
3813 bfd_put_32 (output_bfd
,
3814 relocation
- elf_i386_dtpoff_base (info
),
3815 htab
->elf
.sgot
->contents
+ off
+ 4);
3819 bfd_put_32 (output_bfd
, 0,
3820 htab
->elf
.sgot
->contents
+ off
+ 4);
3821 outrel
.r_info
= ELF32_R_INFO (indx
,
3822 R_386_TLS_DTPOFF32
);
3823 outrel
.r_offset
+= 4;
3824 sreloc
->reloc_count
++;
3825 loc
+= sizeof (Elf32_External_Rel
);
3826 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3827 <= sreloc
->contents
+ sreloc
->size
);
3828 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3831 else if (tls_type
== GOT_TLS_IE_BOTH
)
3833 bfd_put_32 (output_bfd
,
3835 ? relocation
- elf_i386_dtpoff_base (info
)
3837 htab
->elf
.sgot
->contents
+ off
+ 4);
3838 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3839 outrel
.r_offset
+= 4;
3840 sreloc
->reloc_count
++;
3841 loc
+= sizeof (Elf32_External_Rel
);
3842 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3849 local_got_offsets
[r_symndx
] |= 1;
3852 if (off
>= (bfd_vma
) -2
3853 && ! GOT_TLS_GDESC_P (tls_type
))
3855 if (r_type
== R_386_TLS_GOTDESC
3856 || r_type
== R_386_TLS_DESC_CALL
)
3858 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3859 unresolved_reloc
= FALSE
;
3861 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3863 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3864 + htab
->elf
.sgotplt
->output_offset
;
3865 relocation
= htab
->elf
.sgot
->output_section
->vma
3866 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3867 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3868 && tls_type
== GOT_TLS_IE_BOTH
)
3870 if (r_type
== R_386_TLS_IE
)
3871 relocation
+= g_o_t
;
3872 unresolved_reloc
= FALSE
;
3874 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3876 unsigned int val
, type
;
3879 /* GD->IE transition. */
3880 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3881 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3884 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3886 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3888 roff
= rel
->r_offset
- 3;
3892 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3894 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3895 roff
= rel
->r_offset
- 2;
3897 memcpy (contents
+ roff
,
3898 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3899 contents
[roff
+ 7] = 0x80 | (val
& 7);
3900 /* If foo is used only with foo@gotntpoff(%reg) and
3901 foo@indntpoff, but not with foo@gottpoff(%reg), change
3902 subl $foo@gottpoff(%reg), %eax
3904 addl $foo@gotntpoff(%reg), %eax. */
3905 if (tls_type
== GOT_TLS_IE_POS
)
3906 contents
[roff
+ 6] = 0x03;
3907 bfd_put_32 (output_bfd
,
3908 htab
->elf
.sgot
->output_section
->vma
3909 + htab
->elf
.sgot
->output_offset
+ off
3910 - htab
->elf
.sgotplt
->output_section
->vma
3911 - htab
->elf
.sgotplt
->output_offset
,
3912 contents
+ roff
+ 8);
3913 /* Skip R_386_PLT32. */
3917 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3919 /* GDesc -> IE transition.
3920 It's originally something like:
3921 leal x@tlsdesc(%ebx), %eax
3924 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3926 movl x@gottpoff(%ebx), %eax # before negl %eax
3928 Registers other than %eax may be set up here. */
3932 /* First, make sure it's a leal adding ebx to a 32-bit
3933 offset into any register, although it's probably
3934 almost always going to be eax. */
3935 roff
= rel
->r_offset
;
3937 /* Now modify the instruction as appropriate. */
3938 /* To turn a leal into a movl in the form we use it, it
3939 suffices to change the first byte from 0x8d to 0x8b.
3940 aoliva FIXME: should we decide to keep the leal, all
3941 we have to do is remove the statement below, and
3942 adjust the relaxation of R_386_TLS_DESC_CALL. */
3943 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3945 if (tls_type
== GOT_TLS_IE_BOTH
)
3948 bfd_put_32 (output_bfd
,
3949 htab
->elf
.sgot
->output_section
->vma
3950 + htab
->elf
.sgot
->output_offset
+ off
3951 - htab
->elf
.sgotplt
->output_section
->vma
3952 - htab
->elf
.sgotplt
->output_offset
,
3956 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3958 /* GDesc -> IE transition.
3966 depending on how we transformed the TLS_GOTDESC above.
3971 roff
= rel
->r_offset
;
3973 /* Now modify the instruction as appropriate. */
3974 if (tls_type
!= GOT_TLS_IE_NEG
)
3977 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3978 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3983 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3984 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3994 if (! elf_i386_tls_transition (info
, input_bfd
,
3995 input_section
, contents
,
3996 symtab_hdr
, sym_hashes
,
3997 &r_type
, GOT_UNKNOWN
, rel
,
3998 relend
, h
, r_symndx
))
4001 if (r_type
!= R_386_TLS_LDM
)
4003 /* LD->LE transition:
4004 leal foo(%reg), %eax; call ___tls_get_addr.
4006 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4007 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4008 memcpy (contents
+ rel
->r_offset
- 2,
4009 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4010 /* Skip R_386_PC32/R_386_PLT32. */
4015 if (htab
->elf
.sgot
== NULL
)
4018 off
= htab
->tls_ldm_got
.offset
;
4023 Elf_Internal_Rela outrel
;
4026 if (htab
->elf
.srelgot
== NULL
)
4029 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4030 + htab
->elf
.sgot
->output_offset
+ off
);
4032 bfd_put_32 (output_bfd
, 0,
4033 htab
->elf
.sgot
->contents
+ off
);
4034 bfd_put_32 (output_bfd
, 0,
4035 htab
->elf
.sgot
->contents
+ off
+ 4);
4036 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4037 loc
= htab
->elf
.srelgot
->contents
;
4038 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4039 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4040 htab
->tls_ldm_got
.offset
|= 1;
4042 relocation
= htab
->elf
.sgot
->output_section
->vma
4043 + htab
->elf
.sgot
->output_offset
+ off
4044 - htab
->elf
.sgotplt
->output_section
->vma
4045 - htab
->elf
.sgotplt
->output_offset
;
4046 unresolved_reloc
= FALSE
;
4049 case R_386_TLS_LDO_32
:
4050 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4051 relocation
-= elf_i386_dtpoff_base (info
);
4053 /* When converting LDO to LE, we must negate. */
4054 relocation
= -elf_i386_tpoff (info
, relocation
);
4057 case R_386_TLS_LE_32
:
4059 if (!info
->executable
)
4061 Elf_Internal_Rela outrel
;
4065 outrel
.r_offset
= rel
->r_offset
4066 + input_section
->output_section
->vma
4067 + input_section
->output_offset
;
4068 if (h
!= NULL
&& h
->dynindx
!= -1)
4072 if (r_type
== R_386_TLS_LE_32
)
4073 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4075 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4076 sreloc
= elf_section_data (input_section
)->sreloc
;
4079 loc
= sreloc
->contents
;
4080 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4081 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4084 else if (r_type
== R_386_TLS_LE_32
)
4085 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4087 relocation
-= elf_i386_dtpoff_base (info
);
4089 else if (r_type
== R_386_TLS_LE_32
)
4090 relocation
= elf_i386_tpoff (info
, relocation
);
4092 relocation
= -elf_i386_tpoff (info
, relocation
);
4099 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4100 because such sections are not SEC_ALLOC and thus ld.so will
4101 not process them. */
4102 if (unresolved_reloc
4103 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4106 (*_bfd_error_handler
)
4107 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4110 (long) rel
->r_offset
,
4112 h
->root
.root
.string
);
4117 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4118 contents
, rel
->r_offset
,
4121 check_relocation_error
:
4122 if (r
!= bfd_reloc_ok
)
4127 name
= h
->root
.root
.string
;
4130 name
= bfd_elf_string_from_elf_section (input_bfd
,
4131 symtab_hdr
->sh_link
,
4136 name
= bfd_section_name (input_bfd
, sec
);
4139 if (r
== bfd_reloc_overflow
)
4141 if (! ((*info
->callbacks
->reloc_overflow
)
4142 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4143 (bfd_vma
) 0, input_bfd
, input_section
,
4149 (*_bfd_error_handler
)
4150 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4151 input_bfd
, input_section
,
4152 (long) rel
->r_offset
, name
, (int) r
);
4161 /* Finish up dynamic symbol handling. We set the contents of various
4162 dynamic sections here. */
4165 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4166 struct bfd_link_info
*info
,
4167 struct elf_link_hash_entry
*h
,
4168 Elf_Internal_Sym
*sym
)
4170 struct elf_i386_link_hash_table
*htab
;
4172 htab
= elf_i386_hash_table (info
);
4176 if (h
->plt
.offset
!= (bfd_vma
) -1)
4180 Elf_Internal_Rela rel
;
4182 asection
*plt
, *gotplt
, *relplt
;
4184 /* When building a static executable, use .iplt, .igot.plt and
4185 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4186 if (htab
->elf
.splt
!= NULL
)
4188 plt
= htab
->elf
.splt
;
4189 gotplt
= htab
->elf
.sgotplt
;
4190 relplt
= htab
->elf
.srelplt
;
4194 plt
= htab
->elf
.iplt
;
4195 gotplt
= htab
->elf
.igotplt
;
4196 relplt
= htab
->elf
.irelplt
;
4199 /* This symbol has an entry in the procedure linkage table. Set
4202 if ((h
->dynindx
== -1
4203 && !((h
->forced_local
|| info
->executable
)
4205 && h
->type
== STT_GNU_IFUNC
))
4211 /* Get the index in the procedure linkage table which
4212 corresponds to this symbol. This is the index of this symbol
4213 in all the symbols for which we are making plt entries. The
4214 first entry in the procedure linkage table is reserved.
4216 Get the offset into the .got table of the entry that
4217 corresponds to this function. Each .got entry is 4 bytes.
4218 The first three are reserved.
4220 For static executables, we don't reserve anything. */
4222 if (plt
== htab
->elf
.splt
)
4224 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
4225 got_offset
= (plt_index
+ 3) * 4;
4229 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4230 got_offset
= plt_index
* 4;
4233 /* Fill in the entry in the procedure linkage table. */
4236 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4238 bfd_put_32 (output_bfd
,
4239 (gotplt
->output_section
->vma
4240 + gotplt
->output_offset
4242 plt
->contents
+ h
->plt
.offset
+ 2);
4244 if (htab
->is_vxworks
)
4246 int s
, k
, reloc_index
;
4248 /* Create the R_386_32 relocation referencing the GOT
4249 for this PLT entry. */
4251 /* S: Current slot number (zero-based). */
4252 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4253 /* K: Number of relocations for PLTResolve. */
4255 k
= PLTRESOLVE_RELOCS_SHLIB
;
4257 k
= PLTRESOLVE_RELOCS
;
4258 /* Skip the PLTresolve relocations, and the relocations for
4259 the other PLT slots. */
4260 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4261 loc
= (htab
->srelplt2
->contents
+ reloc_index
4262 * sizeof (Elf32_External_Rel
));
4264 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4265 + htab
->elf
.splt
->output_offset
4266 + h
->plt
.offset
+ 2),
4267 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4268 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4270 /* Create the R_386_32 relocation referencing the beginning of
4271 the PLT for this GOT entry. */
4272 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4273 + htab
->elf
.sgotplt
->output_offset
4275 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4276 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4277 loc
+ sizeof (Elf32_External_Rel
));
4282 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4284 bfd_put_32 (output_bfd
, got_offset
,
4285 plt
->contents
+ h
->plt
.offset
+ 2);
4288 /* Don't fill PLT entry for static executables. */
4289 if (plt
== htab
->elf
.splt
)
4291 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4292 plt
->contents
+ h
->plt
.offset
+ 7);
4293 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4294 plt
->contents
+ h
->plt
.offset
+ 12);
4297 /* Fill in the entry in the global offset table. */
4298 bfd_put_32 (output_bfd
,
4299 (plt
->output_section
->vma
4300 + plt
->output_offset
4303 gotplt
->contents
+ got_offset
);
4305 /* Fill in the entry in the .rel.plt section. */
4306 rel
.r_offset
= (gotplt
->output_section
->vma
4307 + gotplt
->output_offset
4309 if (h
->dynindx
== -1
4310 || ((info
->executable
4311 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4313 && h
->type
== STT_GNU_IFUNC
))
4315 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4316 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4317 in the .got.plt section. */
4318 bfd_put_32 (output_bfd
,
4319 (h
->root
.u
.def
.value
4320 + h
->root
.u
.def
.section
->output_section
->vma
4321 + h
->root
.u
.def
.section
->output_offset
),
4322 gotplt
->contents
+ got_offset
);
4323 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4326 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4327 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4328 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4330 if (!h
->def_regular
)
4332 /* Mark the symbol as undefined, rather than as defined in
4333 the .plt section. Leave the value if there were any
4334 relocations where pointer equality matters (this is a clue
4335 for the dynamic linker, to make function pointer
4336 comparisons work between an application and shared
4337 library), otherwise set it to zero. If a function is only
4338 called from a binary, there is no need to slow down
4339 shared libraries because of that. */
4340 sym
->st_shndx
= SHN_UNDEF
;
4341 if (!h
->pointer_equality_needed
)
4346 if (h
->got
.offset
!= (bfd_vma
) -1
4347 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4348 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4350 Elf_Internal_Rela rel
;
4353 /* This symbol has an entry in the global offset table. Set it
4356 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4359 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4360 + htab
->elf
.sgot
->output_offset
4361 + (h
->got
.offset
& ~(bfd_vma
) 1));
4363 /* If this is a static link, or it is a -Bsymbolic link and the
4364 symbol is defined locally or was forced to be local because
4365 of a version file, we just want to emit a RELATIVE reloc.
4366 The entry in the global offset table will already have been
4367 initialized in the relocate_section function. */
4369 && h
->type
== STT_GNU_IFUNC
)
4373 /* Generate R_386_GLOB_DAT. */
4380 if (!h
->pointer_equality_needed
)
4383 /* For non-shared object, we can't use .got.plt, which
4384 contains the real function addres if we need pointer
4385 equality. We load the GOT entry with the PLT entry. */
4386 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4387 bfd_put_32 (output_bfd
,
4388 (plt
->output_section
->vma
4389 + plt
->output_offset
+ h
->plt
.offset
),
4390 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4394 else if (info
->shared
4395 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4397 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4398 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4402 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4404 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4405 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4406 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4409 loc
= htab
->elf
.srelgot
->contents
;
4410 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4411 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4416 Elf_Internal_Rela rel
;
4419 /* This symbol needs a copy reloc. Set it up. */
4421 if (h
->dynindx
== -1
4422 || (h
->root
.type
!= bfd_link_hash_defined
4423 && h
->root
.type
!= bfd_link_hash_defweak
)
4424 || htab
->srelbss
== NULL
)
4427 rel
.r_offset
= (h
->root
.u
.def
.value
4428 + h
->root
.u
.def
.section
->output_section
->vma
4429 + h
->root
.u
.def
.section
->output_offset
);
4430 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4431 loc
= htab
->srelbss
->contents
;
4432 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4433 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4436 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4437 be NULL for local symbols.
4439 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4440 is relative to the ".got" section. */
4442 && (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4443 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
)))
4444 sym
->st_shndx
= SHN_ABS
;
4449 /* Finish up local dynamic symbol handling. We set the contents of
4450 various dynamic sections here. */
4453 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4455 struct elf_link_hash_entry
*h
4456 = (struct elf_link_hash_entry
*) *slot
;
4457 struct bfd_link_info
*info
4458 = (struct bfd_link_info
*) inf
;
4460 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4464 /* Used to decide how to sort relocs in an optimal manner for the
4465 dynamic linker, before writing them out. */
4467 static enum elf_reloc_type_class
4468 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4470 switch (ELF32_R_TYPE (rela
->r_info
))
4472 case R_386_RELATIVE
:
4473 return reloc_class_relative
;
4474 case R_386_JUMP_SLOT
:
4475 return reloc_class_plt
;
4477 return reloc_class_copy
;
4479 return reloc_class_normal
;
4483 /* Finish up the dynamic sections. */
4486 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4487 struct bfd_link_info
*info
)
4489 struct elf_i386_link_hash_table
*htab
;
4493 htab
= elf_i386_hash_table (info
);
4497 dynobj
= htab
->elf
.dynobj
;
4498 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4500 if (htab
->elf
.dynamic_sections_created
)
4502 Elf32_External_Dyn
*dyncon
, *dynconend
;
4504 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4507 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4508 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4509 for (; dyncon
< dynconend
; dyncon
++)
4511 Elf_Internal_Dyn dyn
;
4514 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4519 if (htab
->is_vxworks
4520 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4525 s
= htab
->elf
.sgotplt
;
4526 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4530 s
= htab
->elf
.srelplt
;
4531 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4535 s
= htab
->elf
.srelplt
;
4536 dyn
.d_un
.d_val
= s
->size
;
4540 /* My reading of the SVR4 ABI indicates that the
4541 procedure linkage table relocs (DT_JMPREL) should be
4542 included in the overall relocs (DT_REL). This is
4543 what Solaris does. However, UnixWare can not handle
4544 that case. Therefore, we override the DT_RELSZ entry
4545 here to make it not include the JMPREL relocs. */
4546 s
= htab
->elf
.srelplt
;
4549 dyn
.d_un
.d_val
-= s
->size
;
4553 /* We may not be using the standard ELF linker script.
4554 If .rel.plt is the first .rel section, we adjust
4555 DT_REL to not include it. */
4556 s
= htab
->elf
.srelplt
;
4559 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4561 dyn
.d_un
.d_ptr
+= s
->size
;
4565 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4568 /* Fill in the first entry in the procedure linkage table. */
4569 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4573 memcpy (htab
->elf
.splt
->contents
, elf_i386_pic_plt0_entry
,
4574 sizeof (elf_i386_pic_plt0_entry
));
4575 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4576 htab
->plt0_pad_byte
,
4577 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4581 memcpy (htab
->elf
.splt
->contents
, elf_i386_plt0_entry
,
4582 sizeof(elf_i386_plt0_entry
));
4583 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4584 htab
->plt0_pad_byte
,
4585 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4586 bfd_put_32 (output_bfd
,
4587 (htab
->elf
.sgotplt
->output_section
->vma
4588 + htab
->elf
.sgotplt
->output_offset
4590 htab
->elf
.splt
->contents
+ 2);
4591 bfd_put_32 (output_bfd
,
4592 (htab
->elf
.sgotplt
->output_section
->vma
4593 + htab
->elf
.sgotplt
->output_offset
4595 htab
->elf
.splt
->contents
+ 8);
4597 if (htab
->is_vxworks
)
4599 Elf_Internal_Rela rel
;
4601 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4602 On IA32 we use REL relocations so the addend goes in
4603 the PLT directly. */
4604 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4605 + htab
->elf
.splt
->output_offset
4607 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4608 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4609 htab
->srelplt2
->contents
);
4610 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4611 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4612 + htab
->elf
.splt
->output_offset
4614 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4615 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4616 htab
->srelplt2
->contents
+
4617 sizeof (Elf32_External_Rel
));
4621 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4622 really seem like the right value. */
4623 elf_section_data (htab
->elf
.splt
->output_section
)
4624 ->this_hdr
.sh_entsize
= 4;
4626 /* Correct the .rel.plt.unloaded relocations. */
4627 if (htab
->is_vxworks
&& !info
->shared
)
4629 int num_plts
= (htab
->elf
.splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4632 p
= htab
->srelplt2
->contents
;
4634 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4636 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4638 for (; num_plts
; num_plts
--)
4640 Elf_Internal_Rela rel
;
4641 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4642 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4643 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4644 p
+= sizeof (Elf32_External_Rel
);
4646 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4647 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4648 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4649 p
+= sizeof (Elf32_External_Rel
);
4655 if (htab
->elf
.sgotplt
)
4657 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4659 (*_bfd_error_handler
)
4660 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4664 /* Fill in the first three entries in the global offset table. */
4665 if (htab
->elf
.sgotplt
->size
> 0)
4667 bfd_put_32 (output_bfd
,
4669 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4670 htab
->elf
.sgotplt
->contents
);
4671 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4672 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4675 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4678 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4679 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4681 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4682 htab_traverse (htab
->loc_hash_table
,
4683 elf_i386_finish_local_dynamic_symbol
,
4689 /* Return address for Ith PLT stub in section PLT, for relocation REL
4690 or (bfd_vma) -1 if it should not be included. */
4693 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4694 const arelent
*rel ATTRIBUTE_UNUSED
)
4696 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4699 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4702 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4704 if (h
->plt
.offset
!= (bfd_vma
) -1
4706 && !h
->pointer_equality_needed
)
4709 return _bfd_elf_hash_symbol (h
);
4712 /* Hook called by the linker routine which adds symbols from an object
4716 elf_i386_add_symbol_hook (bfd
* abfd
,
4717 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4718 Elf_Internal_Sym
* sym
,
4719 const char ** namep ATTRIBUTE_UNUSED
,
4720 flagword
* flagsp ATTRIBUTE_UNUSED
,
4721 asection
** secp ATTRIBUTE_UNUSED
,
4722 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4724 if ((abfd
->flags
& DYNAMIC
) == 0
4725 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
4726 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
4727 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
4732 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4733 #define TARGET_LITTLE_NAME "elf32-i386"
4734 #define ELF_ARCH bfd_arch_i386
4735 #define ELF_TARGET_ID I386_ELF_DATA
4736 #define ELF_MACHINE_CODE EM_386
4737 #define ELF_MAXPAGESIZE 0x1000
4739 #define elf_backend_can_gc_sections 1
4740 #define elf_backend_can_refcount 1
4741 #define elf_backend_want_got_plt 1
4742 #define elf_backend_plt_readonly 1
4743 #define elf_backend_want_plt_sym 0
4744 #define elf_backend_got_header_size 12
4746 /* Support RELA for objdump of prelink objects. */
4747 #define elf_info_to_howto elf_i386_info_to_howto_rel
4748 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4750 #define bfd_elf32_mkobject elf_i386_mkobject
4752 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4753 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4754 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4755 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4756 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4758 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4759 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4760 #define elf_backend_check_relocs elf_i386_check_relocs
4761 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4762 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4763 #define elf_backend_fake_sections elf_i386_fake_sections
4764 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4765 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4766 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4767 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4768 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4769 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4770 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4771 #define elf_backend_relocate_section elf_i386_relocate_section
4772 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4773 #define elf_backend_always_size_sections elf_i386_always_size_sections
4774 #define elf_backend_omit_section_dynsym \
4775 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4776 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4777 #define elf_backend_hash_symbol elf_i386_hash_symbol
4778 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4779 #undef elf_backend_post_process_headers
4780 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4782 #include "elf32-target.h"
4784 /* FreeBSD support. */
4786 #undef TARGET_LITTLE_SYM
4787 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4788 #undef TARGET_LITTLE_NAME
4789 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4791 #define ELF_OSABI ELFOSABI_FREEBSD
4793 /* The kernel recognizes executables as valid only if they carry a
4794 "FreeBSD" label in the ELF header. So we put this label on all
4795 executables and (for simplicity) also all other object files. */
4798 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4800 _bfd_elf_set_osabi (abfd
, info
);
4802 #ifdef OLD_FREEBSD_ABI_LABEL
4803 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4804 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4808 #undef elf_backend_post_process_headers
4809 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4811 #define elf32_bed elf32_i386_fbsd_bed
4813 #undef elf_backend_add_symbol_hook
4815 #include "elf32-target.h"
4819 #undef TARGET_LITTLE_SYM
4820 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
4821 #undef TARGET_LITTLE_NAME
4822 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4824 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4825 objects won't be recognized. */
4829 #define elf32_bed elf32_i386_sol2_bed
4831 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4833 #undef elf_backend_static_tls_alignment
4834 #define elf_backend_static_tls_alignment 8
4836 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4838 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4840 #undef elf_backend_want_plt_sym
4841 #define elf_backend_want_plt_sym 1
4843 #include "elf32-target.h"
4845 /* VxWorks support. */
4847 #undef TARGET_LITTLE_SYM
4848 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4849 #undef TARGET_LITTLE_NAME
4850 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4853 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4855 static struct bfd_link_hash_table
*
4856 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4858 struct bfd_link_hash_table
*ret
;
4859 struct elf_i386_link_hash_table
*htab
;
4861 ret
= elf_i386_link_hash_table_create (abfd
);
4864 htab
= (struct elf_i386_link_hash_table
*) ret
;
4865 htab
->is_vxworks
= 1;
4866 htab
->plt0_pad_byte
= 0x90;
4873 #undef elf_backend_relocs_compatible
4874 #undef elf_backend_post_process_headers
4875 #undef bfd_elf32_bfd_link_hash_table_create
4876 #define bfd_elf32_bfd_link_hash_table_create \
4877 elf_i386_vxworks_link_hash_table_create
4878 #undef elf_backend_add_symbol_hook
4879 #define elf_backend_add_symbol_hook \
4880 elf_vxworks_add_symbol_hook
4881 #undef elf_backend_link_output_symbol_hook
4882 #define elf_backend_link_output_symbol_hook \
4883 elf_vxworks_link_output_symbol_hook
4884 #undef elf_backend_emit_relocs
4885 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4886 #undef elf_backend_final_write_processing
4887 #define elf_backend_final_write_processing \
4888 elf_vxworks_final_write_processing
4889 #undef elf_backend_static_tls_alignment
4891 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4893 #undef elf_backend_want_plt_sym
4894 #define elf_backend_want_plt_sym 1
4897 #define elf32_bed elf32_i386_vxworks_bed
4899 #include "elf32-target.h"