1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 /* 386 uses REL relocations instead of RELA. */
37 static reloc_howto_type elf_howto_table
[]=
39 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
40 bfd_elf_generic_reloc
, "R_386_NONE",
41 TRUE
, 0x00000000, 0x00000000, FALSE
),
42 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
43 bfd_elf_generic_reloc
, "R_386_32",
44 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
45 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
46 bfd_elf_generic_reloc
, "R_386_PC32",
47 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
48 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
49 bfd_elf_generic_reloc
, "R_386_GOT32",
50 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
51 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_386_PLT32",
53 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
54 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
55 bfd_elf_generic_reloc
, "R_386_COPY",
56 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
57 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
58 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
59 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
60 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
62 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
63 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_386_RELATIVE",
65 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
66 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_386_GOTOFF",
68 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
69 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_386_GOTPC",
71 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
73 /* We have a gap in the reloc numbers here.
74 R_386_standard counts the number up to this point, and
75 R_386_ext_offset is the value to subtract from a reloc type of
76 R_386_16 thru R_386_PC8 to form an index into this table. */
77 #define R_386_standard (R_386_GOTPC + 1)
78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80 /* These relocs are a GNU extension. */
81 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
83 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
84 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_386_TLS_IE",
86 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
87 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
89 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
90 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_386_TLS_LE",
92 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
93 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_386_TLS_GD",
95 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
96 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
98 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
99 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_386_16",
101 TRUE
, 0xffff, 0xffff, FALSE
),
102 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_386_PC16",
104 TRUE
, 0xffff, 0xffff, TRUE
),
105 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_386_8",
107 TRUE
, 0xff, 0xff, FALSE
),
108 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
109 bfd_elf_generic_reloc
, "R_386_PC8",
110 TRUE
, 0xff, 0xff, TRUE
),
112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
114 /* These are common with Solaris TLS implementation. */
115 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
117 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
118 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
119 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
120 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
121 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
123 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
124 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
125 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
126 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
127 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
129 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
130 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
132 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
135 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
136 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
137 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
138 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
140 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
141 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
142 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
143 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
145 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT
, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE
, /* pc_relative */
158 complain_overflow_dont
, /* complain_on_overflow */
159 NULL
, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE
, /* partial_inplace */
164 FALSE
), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY
, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE
, /* pc_relative */
173 complain_overflow_dont
, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE
, /* partial_inplace */
179 FALSE
) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type
*
193 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
194 bfd_reloc_code_real_type code
)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table
[R_386_NONE
];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table
[R_386_32
];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table
[R_386_32
];
210 case BFD_RELOC_32_PCREL
:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table
[R_386_PC32
];
214 case BFD_RELOC_386_GOT32
:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table
[R_386_GOT32
];
218 case BFD_RELOC_386_PLT32
:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table
[R_386_PLT32
];
222 case BFD_RELOC_386_COPY
:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table
[R_386_COPY
];
226 case BFD_RELOC_386_GLOB_DAT
:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table
[R_386_GLOB_DAT
];
230 case BFD_RELOC_386_JUMP_SLOT
:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table
[R_386_JUMP_SLOT
];
234 case BFD_RELOC_386_RELATIVE
:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table
[R_386_RELATIVE
];
238 case BFD_RELOC_386_GOTOFF
:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table
[R_386_GOTOFF
];
242 case BFD_RELOC_386_GOTPC
:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table
[R_386_GOTPC
];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF
:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
251 case BFD_RELOC_386_TLS_IE
:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
255 case BFD_RELOC_386_TLS_GOTIE
:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
259 case BFD_RELOC_386_TLS_LE
:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
263 case BFD_RELOC_386_TLS_GD
:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
267 case BFD_RELOC_386_TLS_LDM
:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
275 case BFD_RELOC_16_PCREL
:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
283 case BFD_RELOC_8_PCREL
:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32
:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
292 case BFD_RELOC_386_TLS_IE_32
:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
296 case BFD_RELOC_386_TLS_LE_32
:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
300 case BFD_RELOC_386_TLS_DTPMOD32
:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
304 case BFD_RELOC_386_TLS_DTPOFF32
:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
308 case BFD_RELOC_386_TLS_TPOFF32
:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
312 case BFD_RELOC_386_TLS_GOTDESC
:
313 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
314 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
316 case BFD_RELOC_386_TLS_DESC_CALL
:
317 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
318 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
320 case BFD_RELOC_386_TLS_DESC
:
321 TRACE ("BFD_RELOC_386_TLS_DESC");
322 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
324 case BFD_RELOC_386_IRELATIVE
:
325 TRACE ("BFD_RELOC_386_IRELATIVE");
326 return &elf_howto_table
[R_386_IRELATIVE
];
328 case BFD_RELOC_VTABLE_INHERIT
:
329 TRACE ("BFD_RELOC_VTABLE_INHERIT");
330 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
332 case BFD_RELOC_VTABLE_ENTRY
:
333 TRACE ("BFD_RELOC_VTABLE_ENTRY");
334 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
344 static reloc_howto_type
*
345 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
350 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
351 if (elf_howto_table
[i
].name
!= NULL
352 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
353 return &elf_howto_table
[i
];
358 static reloc_howto_type
*
359 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
363 if ((indx
= r_type
) >= R_386_standard
364 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
365 >= R_386_ext
- R_386_standard
)
366 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
367 >= R_386_irelative
- R_386_ext
)
368 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
369 >= R_386_vt
- R_386_irelative
))
371 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
375 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
376 return &elf_howto_table
[indx
];
380 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
382 Elf_Internal_Rela
*dst
)
384 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
385 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
388 /* Return whether a symbol name implies a local label. The UnixWare
389 2.1 cc generates temporary symbols that start with .X, so we
390 recognize them here. FIXME: do other SVR4 compilers also use .X?.
391 If so, we should move the .X recognition into
392 _bfd_elf_is_local_label_name. */
395 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
397 if (name
[0] == '.' && name
[1] == 'X')
400 return _bfd_elf_is_local_label_name (abfd
, name
);
403 /* Support for core dump NOTE sections. */
406 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
411 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
413 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
419 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
422 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
426 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
430 switch (note
->descsz
)
435 case 144: /* Linux/i386 */
437 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
440 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
450 /* Make a ".reg/999" section. */
451 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
452 size
, note
->descpos
+ offset
);
456 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
458 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
460 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
465 elf_tdata (abfd
)->core_program
466 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
467 elf_tdata (abfd
)->core_command
468 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
472 switch (note
->descsz
)
477 case 124: /* Linux/i386 elf_prpsinfo. */
478 elf_tdata (abfd
)->core_program
479 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
480 elf_tdata (abfd
)->core_command
481 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
485 /* Note that for some reason, a spurious space is tacked
486 onto the end of the args in some (at least one anyway)
487 implementations, so strip it off if it exists. */
489 char *command
= elf_tdata (abfd
)->core_command
;
490 int n
= strlen (command
);
492 if (0 < n
&& command
[n
- 1] == ' ')
493 command
[n
- 1] = '\0';
499 /* Functions for the i386 ELF linker.
501 In order to gain some understanding of code in this file without
502 knowing all the intricate details of the linker, note the
505 Functions named elf_i386_* are called by external routines, other
506 functions are only called locally. elf_i386_* functions appear
507 in this file more or less in the order in which they are called
508 from external routines. eg. elf_i386_check_relocs is called
509 early in the link process, elf_i386_finish_dynamic_sections is
510 one of the last functions. */
513 /* The name of the dynamic interpreter. This is put in the .interp
516 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
518 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
519 copying dynamic variables from a shared lib into an app's dynbss
520 section, and instead use a dynamic relocation to point into the
522 #define ELIMINATE_COPY_RELOCS 1
524 /* The size in bytes of an entry in the procedure linkage table. */
526 #define PLT_ENTRY_SIZE 16
528 /* The first entry in an absolute procedure linkage table looks like
529 this. See the SVR4 ABI i386 supplement to see how this works.
530 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
532 static const bfd_byte elf_i386_plt0_entry
[12] =
534 0xff, 0x35, /* pushl contents of address */
535 0, 0, 0, 0, /* replaced with address of .got + 4. */
536 0xff, 0x25, /* jmp indirect */
537 0, 0, 0, 0 /* replaced with address of .got + 8. */
540 /* Subsequent entries in an absolute procedure linkage table look like
543 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
545 0xff, 0x25, /* jmp indirect */
546 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
547 0x68, /* pushl immediate */
548 0, 0, 0, 0, /* replaced with offset into relocation table. */
549 0xe9, /* jmp relative */
550 0, 0, 0, 0 /* replaced with offset to start of .plt. */
553 /* The first entry in a PIC procedure linkage table look like this.
554 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
556 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
558 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
559 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
562 /* Subsequent entries in a PIC procedure linkage table look like this. */
564 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
566 0xff, 0xa3, /* jmp *offset(%ebx) */
567 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
568 0x68, /* pushl immediate */
569 0, 0, 0, 0, /* replaced with offset into relocation table. */
570 0xe9, /* jmp relative */
571 0, 0, 0, 0 /* replaced with offset to start of .plt. */
574 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
575 for the PLTResolve stub and then for each PLT entry. */
576 #define PLTRESOLVE_RELOCS_SHLIB 0
577 #define PLTRESOLVE_RELOCS 2
578 #define PLT_NON_JUMP_SLOT_RELOCS 2
580 /* i386 ELF linker hash entry. */
582 struct elf_i386_link_hash_entry
584 struct elf_link_hash_entry elf
;
586 /* Track dynamic relocs copied for this symbol. */
587 struct elf_dyn_relocs
*dyn_relocs
;
589 #define GOT_UNKNOWN 0
593 #define GOT_TLS_IE_POS 5
594 #define GOT_TLS_IE_NEG 6
595 #define GOT_TLS_IE_BOTH 7
596 #define GOT_TLS_GDESC 8
597 #define GOT_TLS_GD_BOTH_P(type) \
598 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
599 #define GOT_TLS_GD_P(type) \
600 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
601 #define GOT_TLS_GDESC_P(type) \
602 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
603 #define GOT_TLS_GD_ANY_P(type) \
604 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
605 unsigned char tls_type
;
607 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
608 starting at the end of the jump table. */
612 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
614 struct elf_i386_obj_tdata
616 struct elf_obj_tdata root
;
618 /* tls_type for each local got entry. */
619 char *local_got_tls_type
;
621 /* GOTPLT entries for TLS descriptors. */
622 bfd_vma
*local_tlsdesc_gotent
;
625 #define elf_i386_tdata(abfd) \
626 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
628 #define elf_i386_local_got_tls_type(abfd) \
629 (elf_i386_tdata (abfd)->local_got_tls_type)
631 #define elf_i386_local_tlsdesc_gotent(abfd) \
632 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
634 #define is_i386_elf(bfd) \
635 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
636 && elf_tdata (bfd) != NULL \
637 && elf_object_id (bfd) == I386_ELF_TDATA)
640 elf_i386_mkobject (bfd
*abfd
)
642 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
646 /* i386 ELF linker hash table. */
648 struct elf_i386_link_hash_table
650 struct elf_link_hash_table elf
;
652 /* Short-cuts to get to dynamic linker sections. */
656 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
659 /* True if the target system is VxWorks. */
662 /* Value used to fill the last word of the first plt entry. */
663 bfd_byte plt0_pad_byte
;
665 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
666 bfd_vma next_tls_desc_index
;
669 bfd_signed_vma refcount
;
673 /* The amount of space used by the reserved portion of the sgotplt
674 section, plus whatever space is used by the jump slots. */
675 bfd_vma sgotplt_jump_table_size
;
677 /* Small local sym to section mapping cache. */
678 struct sym_sec_cache sym_sec
;
680 /* _TLS_MODULE_BASE_ symbol. */
681 struct bfd_link_hash_entry
*tls_module_base
;
683 /* Used by local STT_GNU_IFUNC symbols. */
684 htab_t loc_hash_table
;
685 void *loc_hash_memory
;
688 /* Get the i386 ELF linker hash table from a link_info structure. */
690 #define elf_i386_hash_table(p) \
691 ((struct elf_i386_link_hash_table *) ((p)->hash))
693 #define elf_i386_compute_jump_table_size(htab) \
694 ((htab)->next_tls_desc_index * 4)
696 /* Create an entry in an i386 ELF linker hash table. */
698 static struct bfd_hash_entry
*
699 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
700 struct bfd_hash_table
*table
,
703 /* Allocate the structure if it has not already been allocated by a
707 entry
= bfd_hash_allocate (table
,
708 sizeof (struct elf_i386_link_hash_entry
));
713 /* Call the allocation method of the superclass. */
714 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
717 struct elf_i386_link_hash_entry
*eh
;
719 eh
= (struct elf_i386_link_hash_entry
*) entry
;
720 eh
->dyn_relocs
= NULL
;
721 eh
->tls_type
= GOT_UNKNOWN
;
722 eh
->tlsdesc_got
= (bfd_vma
) -1;
728 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
729 for local symbol so that we can handle local STT_GNU_IFUNC symbols
730 as global symbol. We reuse indx and dynstr_index for local symbol
731 hash since they aren't used by global symbols in this backend. */
734 elf_i386_local_htab_hash (const void *ptr
)
736 struct elf_link_hash_entry
*h
737 = (struct elf_link_hash_entry
*) ptr
;
738 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
741 /* Compare local hash entries. */
744 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
746 struct elf_link_hash_entry
*h1
747 = (struct elf_link_hash_entry
*) ptr1
;
748 struct elf_link_hash_entry
*h2
749 = (struct elf_link_hash_entry
*) ptr2
;
751 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
754 /* Find and/or create a hash entry for local symbol. */
756 static struct elf_link_hash_entry
*
757 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
758 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
761 struct elf_i386_link_hash_entry e
, *ret
;
762 asection
*sec
= abfd
->sections
;
763 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
764 ELF32_R_SYM (rel
->r_info
));
767 e
.elf
.indx
= sec
->id
;
768 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
769 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
770 create
? INSERT
: NO_INSERT
);
777 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
781 ret
= (struct elf_i386_link_hash_entry
*)
782 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
783 sizeof (struct elf_i386_link_hash_entry
));
786 memset (ret
, 0, sizeof (*ret
));
787 ret
->elf
.indx
= sec
->id
;
788 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
789 ret
->elf
.dynindx
= -1;
790 ret
->elf
.plt
.offset
= (bfd_vma
) -1;
791 ret
->elf
.got
.offset
= (bfd_vma
) -1;
797 /* Create an i386 ELF linker hash table. */
799 static struct bfd_link_hash_table
*
800 elf_i386_link_hash_table_create (bfd
*abfd
)
802 struct elf_i386_link_hash_table
*ret
;
803 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
805 ret
= bfd_malloc (amt
);
809 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
810 elf_i386_link_hash_newfunc
,
811 sizeof (struct elf_i386_link_hash_entry
)))
819 ret
->tls_ldm_got
.refcount
= 0;
820 ret
->next_tls_desc_index
= 0;
821 ret
->sgotplt_jump_table_size
= 0;
822 ret
->sym_sec
.abfd
= NULL
;
824 ret
->srelplt2
= NULL
;
825 ret
->plt0_pad_byte
= 0;
826 ret
->tls_module_base
= NULL
;
828 ret
->loc_hash_table
= htab_try_create (1024,
829 elf_i386_local_htab_hash
,
830 elf_i386_local_htab_eq
,
832 ret
->loc_hash_memory
= objalloc_create ();
833 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
839 return &ret
->elf
.root
;
842 /* Destroy an i386 ELF linker hash table. */
845 elf_i386_link_hash_table_free (struct bfd_link_hash_table
*hash
)
847 struct elf_i386_link_hash_table
*htab
848 = (struct elf_i386_link_hash_table
*) hash
;
850 if (htab
->loc_hash_table
)
851 htab_delete (htab
->loc_hash_table
);
852 if (htab
->loc_hash_memory
)
853 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
854 _bfd_generic_link_hash_table_free (hash
);
857 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
858 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
862 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
864 struct elf_i386_link_hash_table
*htab
;
866 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
869 htab
= elf_i386_hash_table (info
);
870 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
872 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
875 || (!info
->shared
&& !htab
->srelbss
))
879 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
886 /* Copy the extra info we tack onto an elf_link_hash_entry. */
889 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
890 struct elf_link_hash_entry
*dir
,
891 struct elf_link_hash_entry
*ind
)
893 struct elf_i386_link_hash_entry
*edir
, *eind
;
895 edir
= (struct elf_i386_link_hash_entry
*) dir
;
896 eind
= (struct elf_i386_link_hash_entry
*) ind
;
898 if (eind
->dyn_relocs
!= NULL
)
900 if (edir
->dyn_relocs
!= NULL
)
902 struct elf_dyn_relocs
**pp
;
903 struct elf_dyn_relocs
*p
;
905 /* Add reloc counts against the indirect sym to the direct sym
906 list. Merge any entries against the same section. */
907 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
909 struct elf_dyn_relocs
*q
;
911 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
912 if (q
->sec
== p
->sec
)
914 q
->pc_count
+= p
->pc_count
;
915 q
->count
+= p
->count
;
922 *pp
= edir
->dyn_relocs
;
925 edir
->dyn_relocs
= eind
->dyn_relocs
;
926 eind
->dyn_relocs
= NULL
;
929 if (ind
->root
.type
== bfd_link_hash_indirect
930 && dir
->got
.refcount
<= 0)
932 edir
->tls_type
= eind
->tls_type
;
933 eind
->tls_type
= GOT_UNKNOWN
;
936 if (ELIMINATE_COPY_RELOCS
937 && ind
->root
.type
!= bfd_link_hash_indirect
938 && dir
->dynamic_adjusted
)
940 /* If called to transfer flags for a weakdef during processing
941 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
942 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
943 dir
->ref_dynamic
|= ind
->ref_dynamic
;
944 dir
->ref_regular
|= ind
->ref_regular
;
945 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
946 dir
->needs_plt
|= ind
->needs_plt
;
947 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
950 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
960 /* Return TRUE if the TLS access code sequence support transition
964 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
966 Elf_Internal_Shdr
*symtab_hdr
,
967 struct elf_link_hash_entry
**sym_hashes
,
969 const Elf_Internal_Rela
*rel
,
970 const Elf_Internal_Rela
*relend
)
972 unsigned int val
, type
;
973 unsigned long r_symndx
;
974 struct elf_link_hash_entry
*h
;
977 /* Get the section contents. */
978 if (contents
== NULL
)
980 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
981 contents
= elf_section_data (sec
)->this_hdr
.contents
;
984 /* FIXME: How to better handle error condition? */
985 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
988 /* Cache the section contents for elf_link_input_bfd. */
989 elf_section_data (sec
)->this_hdr
.contents
= contents
;
993 offset
= rel
->r_offset
;
998 if (offset
< 2 || (rel
+ 1) >= relend
)
1001 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1002 if (r_type
== R_386_TLS_GD
)
1004 /* Check transition from GD access model. Only
1005 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1006 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1007 can transit to different access model. */
1008 if ((offset
+ 10) > sec
->size
||
1009 (type
!= 0x8d && type
!= 0x04))
1012 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1015 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1019 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1022 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1027 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1028 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1031 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1037 /* Check transition from LD access model. Only
1038 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1039 can transit to different access model. */
1040 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1043 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1044 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1048 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1051 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1052 if (r_symndx
< symtab_hdr
->sh_info
)
1055 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1056 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1057 may be versioned. */
1059 && h
->root
.root
.string
!= NULL
1060 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1061 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1062 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1066 /* Check transition from IE access model:
1067 movl foo@indntpoff(%rip), %eax
1068 movl foo@indntpoff(%rip), %reg
1069 addl foo@indntpoff(%rip), %reg
1072 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1075 /* Check "movl foo@tpoff(%rip), %eax" first. */
1076 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1083 /* Check movl|addl foo@tpoff(%rip), %reg. */
1084 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1085 return ((type
== 0x8b || type
== 0x03)
1086 && (val
& 0xc7) == 0x05);
1088 case R_386_TLS_GOTIE
:
1089 case R_386_TLS_IE_32
:
1090 /* Check transition from {IE_32,GOTIE} access model:
1091 subl foo@{tpoff,gontoff}(%reg1), %reg2
1092 movl foo@{tpoff,gontoff}(%reg1), %reg2
1093 addl foo@{tpoff,gontoff}(%reg1), %reg2
1096 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1099 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1100 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1103 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1104 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1106 case R_386_TLS_GOTDESC
:
1107 /* Check transition from GDesc access model:
1108 leal x@tlsdesc(%ebx), %eax
1110 Make sure it's a leal adding ebx to a 32-bit offset
1111 into any register, although it's probably almost always
1114 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1117 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1120 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1121 return (val
& 0xc7) == 0x83;
1123 case R_386_TLS_DESC_CALL
:
1124 /* Check transition from GDesc access model:
1125 call *x@tlsdesc(%rax)
1127 if (offset
+ 2 <= sec
->size
)
1129 /* Make sure that it's a call *x@tlsdesc(%rax). */
1130 static i386_opcode16 call
= { { 0xff, 0x10 } };
1131 return bfd_get_16 (abfd
, contents
+ offset
) == call
.i
;
1141 /* Return TRUE if the TLS access transition is OK or no transition
1142 will be performed. Update R_TYPE if there is a transition. */
1145 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1146 asection
*sec
, bfd_byte
*contents
,
1147 Elf_Internal_Shdr
*symtab_hdr
,
1148 struct elf_link_hash_entry
**sym_hashes
,
1149 unsigned int *r_type
, int tls_type
,
1150 const Elf_Internal_Rela
*rel
,
1151 const Elf_Internal_Rela
*relend
,
1152 struct elf_link_hash_entry
*h
)
1154 unsigned int from_type
= *r_type
;
1155 unsigned int to_type
= from_type
;
1156 bfd_boolean check
= TRUE
;
1161 case R_386_TLS_GOTDESC
:
1162 case R_386_TLS_DESC_CALL
:
1163 case R_386_TLS_IE_32
:
1165 case R_386_TLS_GOTIE
:
1169 to_type
= R_386_TLS_LE_32
;
1170 else if (from_type
!= R_386_TLS_IE
1171 && from_type
!= R_386_TLS_GOTIE
)
1172 to_type
= R_386_TLS_IE_32
;
1175 /* When we are called from elf_i386_relocate_section, CONTENTS
1176 isn't NULL and there may be additional transitions based on
1178 if (contents
!= NULL
)
1180 unsigned int new_to_type
= to_type
;
1185 && (tls_type
& GOT_TLS_IE
))
1186 new_to_type
= R_386_TLS_LE_32
;
1188 if (to_type
== R_386_TLS_GD
1189 || to_type
== R_386_TLS_GOTDESC
1190 || to_type
== R_386_TLS_DESC_CALL
)
1192 if (tls_type
== GOT_TLS_IE_POS
)
1193 new_to_type
= R_386_TLS_GOTIE
;
1194 else if (tls_type
& GOT_TLS_IE
)
1195 new_to_type
= R_386_TLS_IE_32
;
1198 /* We checked the transition before when we were called from
1199 elf_i386_check_relocs. We only want to check the new
1200 transition which hasn't been checked before. */
1201 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1202 to_type
= new_to_type
;
1209 to_type
= R_386_TLS_LE_32
;
1216 /* Return TRUE if there is no transition. */
1217 if (from_type
== to_type
)
1220 /* Check if the transition can be performed. */
1222 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1223 symtab_hdr
, sym_hashes
,
1224 from_type
, rel
, relend
))
1226 reloc_howto_type
*from
, *to
;
1228 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1229 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1231 (*_bfd_error_handler
)
1232 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1233 "in section `%A' failed"),
1234 abfd
, sec
, from
->name
, to
->name
,
1235 h
? h
->root
.root
.string
: "a local symbol",
1236 (unsigned long) rel
->r_offset
);
1237 bfd_set_error (bfd_error_bad_value
);
1245 /* Look through the relocs for a section during the first phase, and
1246 calculate needed space in the global offset table, procedure linkage
1247 table, and dynamic reloc sections. */
1250 elf_i386_check_relocs (bfd
*abfd
,
1251 struct bfd_link_info
*info
,
1253 const Elf_Internal_Rela
*relocs
)
1255 struct elf_i386_link_hash_table
*htab
;
1256 Elf_Internal_Shdr
*symtab_hdr
;
1257 struct elf_link_hash_entry
**sym_hashes
;
1258 const Elf_Internal_Rela
*rel
;
1259 const Elf_Internal_Rela
*rel_end
;
1261 Elf_Internal_Sym
*isymbuf
;
1263 if (info
->relocatable
)
1266 BFD_ASSERT (is_i386_elf (abfd
));
1268 htab
= elf_i386_hash_table (info
);
1269 symtab_hdr
= &elf_symtab_hdr (abfd
);
1270 isymbuf
= (Elf_Internal_Sym
*) symtab_hdr
->contents
;
1271 sym_hashes
= elf_sym_hashes (abfd
);
1275 rel_end
= relocs
+ sec
->reloc_count
;
1276 for (rel
= relocs
; rel
< rel_end
; rel
++)
1278 unsigned int r_type
;
1279 unsigned long r_symndx
;
1280 struct elf_link_hash_entry
*h
;
1282 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1283 r_type
= ELF32_R_TYPE (rel
->r_info
);
1285 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1287 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1293 if (r_symndx
< symtab_hdr
->sh_info
)
1295 /* A local symbol. */
1296 Elf_Internal_Sym
*isym
;
1298 /* Read this BFD's local symbols. */
1299 if (isymbuf
== NULL
)
1301 if (isymbuf
== NULL
)
1302 isymbuf
= bfd_elf_get_elf_syms (abfd
, symtab_hdr
,
1303 symtab_hdr
->sh_info
, 0,
1305 if (isymbuf
== NULL
)
1309 /* Check relocation against local STT_GNU_IFUNC symbol. */
1310 isym
= isymbuf
+ r_symndx
;
1311 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1313 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
,
1318 /* Fake a STT_GNU_IFUNC symbol. */
1319 h
->type
= STT_GNU_IFUNC
;
1322 h
->forced_local
= 1;
1323 h
->root
.type
= bfd_link_hash_defined
;
1330 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1331 while (h
->root
.type
== bfd_link_hash_indirect
1332 || h
->root
.type
== bfd_link_hash_warning
)
1333 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1338 /* Create the ifunc sections for static executables. If we
1339 never see an indirect function symbol nor we are building
1340 a static executable, those sections will be empty and
1341 won't appear in output. */
1352 if (!_bfd_elf_create_ifunc_sections (abfd
, info
))
1357 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1358 it here if it is defined in a non-shared object. */
1359 if (h
->type
== STT_GNU_IFUNC
1362 /* It is referenced by a non-shared object. */
1365 /* STT_GNU_IFUNC symbol must go through PLT. */
1366 h
->plt
.refcount
+= 1;
1368 /* STT_GNU_IFUNC needs dynamic sections. */
1369 if (htab
->elf
.dynobj
== NULL
)
1370 htab
->elf
.dynobj
= abfd
;
1375 (*_bfd_error_handler
)
1376 (_("%B: relocation %s against STT_GNU_IFUNC "
1377 "symbol `%s' isn't handled by %s"), abfd
,
1378 elf_howto_table
[r_type
].name
,
1379 (h
->root
.root
.string
1380 ? h
->root
.root
.string
: "a local symbol"),
1382 bfd_set_error (bfd_error_bad_value
);
1387 h
->pointer_equality_needed
= 1;
1390 /* We must copy these reloc types into the
1391 output file. Create a reloc section in
1392 dynobj and make room for this reloc. */
1393 sreloc
= _bfd_elf_create_ifunc_dyn_reloc
1394 (abfd
, info
, sec
, sreloc
,
1395 &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
);
1410 h
->got
.refcount
+= 1;
1411 if (htab
->elf
.sgot
== NULL
1412 && !_bfd_elf_create_got_section (htab
->elf
.dynobj
,
1422 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1423 symtab_hdr
, sym_hashes
,
1424 &r_type
, GOT_UNKNOWN
,
1431 htab
->tls_ldm_got
.refcount
+= 1;
1435 /* This symbol requires a procedure linkage table entry. We
1436 actually build the entry in adjust_dynamic_symbol,
1437 because this might be a case of linking PIC code which is
1438 never referenced by a dynamic object, in which case we
1439 don't need to generate a procedure linkage table entry
1442 /* If this is a local symbol, we resolve it directly without
1443 creating a procedure linkage table entry. */
1448 h
->plt
.refcount
+= 1;
1451 case R_386_TLS_IE_32
:
1453 case R_386_TLS_GOTIE
:
1455 info
->flags
|= DF_STATIC_TLS
;
1460 case R_386_TLS_GOTDESC
:
1461 case R_386_TLS_DESC_CALL
:
1462 /* This symbol requires a global offset table entry. */
1464 int tls_type
, old_tls_type
;
1469 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1470 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1471 case R_386_TLS_GOTDESC
:
1472 case R_386_TLS_DESC_CALL
:
1473 tls_type
= GOT_TLS_GDESC
; break;
1474 case R_386_TLS_IE_32
:
1475 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1476 tls_type
= GOT_TLS_IE_NEG
;
1478 /* If this is a GD->IE transition, we may use either of
1479 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1480 tls_type
= GOT_TLS_IE
;
1483 case R_386_TLS_GOTIE
:
1484 tls_type
= GOT_TLS_IE_POS
; break;
1489 h
->got
.refcount
+= 1;
1490 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1494 bfd_signed_vma
*local_got_refcounts
;
1496 /* This is a global offset table entry for a local symbol. */
1497 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1498 if (local_got_refcounts
== NULL
)
1502 size
= symtab_hdr
->sh_info
;
1503 size
*= (sizeof (bfd_signed_vma
)
1504 + sizeof (bfd_vma
) + sizeof(char));
1505 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1506 if (local_got_refcounts
== NULL
)
1508 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1509 elf_i386_local_tlsdesc_gotent (abfd
)
1510 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1511 elf_i386_local_got_tls_type (abfd
)
1512 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1514 local_got_refcounts
[r_symndx
] += 1;
1515 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1518 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1519 tls_type
|= old_tls_type
;
1520 /* If a TLS symbol is accessed using IE at least once,
1521 there is no point to use dynamic model for it. */
1522 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1523 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1524 || (tls_type
& GOT_TLS_IE
) == 0))
1526 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1527 tls_type
= old_tls_type
;
1528 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1529 && GOT_TLS_GD_ANY_P (tls_type
))
1530 tls_type
|= old_tls_type
;
1533 (*_bfd_error_handler
)
1534 (_("%B: `%s' accessed both as normal and "
1535 "thread local symbol"),
1537 h
? h
->root
.root
.string
: "<local>");
1542 if (old_tls_type
!= tls_type
)
1545 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1547 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1555 if (htab
->elf
.sgot
== NULL
)
1557 if (htab
->elf
.dynobj
== NULL
)
1558 htab
->elf
.dynobj
= abfd
;
1559 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1562 if (r_type
!= R_386_TLS_IE
)
1566 case R_386_TLS_LE_32
:
1570 info
->flags
|= DF_STATIC_TLS
;
1575 if (h
!= NULL
&& info
->executable
)
1577 /* If this reloc is in a read-only section, we might
1578 need a copy reloc. We can't check reliably at this
1579 stage whether the section is read-only, as input
1580 sections have not yet been mapped to output sections.
1581 Tentatively set the flag for now, and correct in
1582 adjust_dynamic_symbol. */
1585 /* We may need a .plt entry if the function this reloc
1586 refers to is in a shared lib. */
1587 h
->plt
.refcount
+= 1;
1588 if (r_type
!= R_386_PC32
)
1589 h
->pointer_equality_needed
= 1;
1592 /* If we are creating a shared library, and this is a reloc
1593 against a global symbol, or a non PC relative reloc
1594 against a local symbol, then we need to copy the reloc
1595 into the shared library. However, if we are linking with
1596 -Bsymbolic, we do not need to copy a reloc against a
1597 global symbol which is defined in an object we are
1598 including in the link (i.e., DEF_REGULAR is set). At
1599 this point we have not seen all the input files, so it is
1600 possible that DEF_REGULAR is not set now but will be set
1601 later (it is never cleared). In case of a weak definition,
1602 DEF_REGULAR may be cleared later by a strong definition in
1603 a shared library. We account for that possibility below by
1604 storing information in the relocs_copied field of the hash
1605 table entry. A similar situation occurs when creating
1606 shared libraries and symbol visibility changes render the
1609 If on the other hand, we are creating an executable, we
1610 may need to keep relocations for symbols satisfied by a
1611 dynamic library if we manage to avoid copy relocs for the
1614 && (sec
->flags
& SEC_ALLOC
) != 0
1615 && (r_type
!= R_386_PC32
1617 && (! SYMBOLIC_BIND (info
, h
)
1618 || h
->root
.type
== bfd_link_hash_defweak
1619 || !h
->def_regular
))))
1620 || (ELIMINATE_COPY_RELOCS
1622 && (sec
->flags
& SEC_ALLOC
) != 0
1624 && (h
->root
.type
== bfd_link_hash_defweak
1625 || !h
->def_regular
)))
1627 struct elf_dyn_relocs
*p
;
1628 struct elf_dyn_relocs
**head
;
1630 /* We must copy these reloc types into the output file.
1631 Create a reloc section in dynobj and make room for
1635 if (htab
->elf
.dynobj
== NULL
)
1636 htab
->elf
.dynobj
= abfd
;
1638 sreloc
= _bfd_elf_make_dynamic_reloc_section
1639 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1645 /* If this is a global symbol, we count the number of
1646 relocations we need for this symbol. */
1649 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1654 /* Track dynamic relocs needed for local syms too.
1655 We really need local syms available to do this
1659 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1664 vpp
= &elf_section_data (s
)->local_dynrel
;
1665 head
= (struct elf_dyn_relocs
**)vpp
;
1669 if (p
== NULL
|| p
->sec
!= sec
)
1671 bfd_size_type amt
= sizeof *p
;
1672 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1683 if (r_type
== R_386_PC32
)
1688 /* This relocation describes the C++ object vtable hierarchy.
1689 Reconstruct it for later use during GC. */
1690 case R_386_GNU_VTINHERIT
:
1691 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1695 /* This relocation describes which C++ vtable entries are actually
1696 used. Record for later use during GC. */
1697 case R_386_GNU_VTENTRY
:
1698 BFD_ASSERT (h
!= NULL
);
1700 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1710 && (unsigned char *) isymbuf
!= symtab_hdr
->contents
)
1712 if (!info
->keep_memory
)
1716 /* Cache the symbols for elf_link_input_bfd. */
1717 symtab_hdr
->contents
= (unsigned char *) isymbuf
;
1725 && (unsigned char *) isymbuf
!= symtab_hdr
->contents
)
1730 /* Return the section that should be marked against GC for a given
1734 elf_i386_gc_mark_hook (asection
*sec
,
1735 struct bfd_link_info
*info
,
1736 Elf_Internal_Rela
*rel
,
1737 struct elf_link_hash_entry
*h
,
1738 Elf_Internal_Sym
*sym
)
1741 switch (ELF32_R_TYPE (rel
->r_info
))
1743 case R_386_GNU_VTINHERIT
:
1744 case R_386_GNU_VTENTRY
:
1748 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1751 /* Update the got entry reference counts for the section being removed. */
1754 elf_i386_gc_sweep_hook (bfd
*abfd
,
1755 struct bfd_link_info
*info
,
1757 const Elf_Internal_Rela
*relocs
)
1759 Elf_Internal_Shdr
*symtab_hdr
;
1760 struct elf_link_hash_entry
**sym_hashes
;
1761 bfd_signed_vma
*local_got_refcounts
;
1762 const Elf_Internal_Rela
*rel
, *relend
;
1764 if (info
->relocatable
)
1767 elf_section_data (sec
)->local_dynrel
= NULL
;
1769 symtab_hdr
= &elf_symtab_hdr (abfd
);
1770 sym_hashes
= elf_sym_hashes (abfd
);
1771 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1773 relend
= relocs
+ sec
->reloc_count
;
1774 for (rel
= relocs
; rel
< relend
; rel
++)
1776 unsigned long r_symndx
;
1777 unsigned int r_type
;
1778 struct elf_link_hash_entry
*h
= NULL
;
1780 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1781 if (r_symndx
>= symtab_hdr
->sh_info
)
1783 struct elf_i386_link_hash_entry
*eh
;
1784 struct elf_dyn_relocs
**pp
;
1785 struct elf_dyn_relocs
*p
;
1787 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1788 while (h
->root
.type
== bfd_link_hash_indirect
1789 || h
->root
.type
== bfd_link_hash_warning
)
1790 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1791 eh
= (struct elf_i386_link_hash_entry
*) h
;
1793 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1796 /* Everything must go for SEC. */
1802 r_type
= ELF32_R_TYPE (rel
->r_info
);
1803 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1804 symtab_hdr
, sym_hashes
,
1805 &r_type
, GOT_UNKNOWN
,
1812 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1813 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1817 case R_386_TLS_GOTDESC
:
1818 case R_386_TLS_DESC_CALL
:
1819 case R_386_TLS_IE_32
:
1821 case R_386_TLS_GOTIE
:
1825 if (h
->got
.refcount
> 0)
1826 h
->got
.refcount
-= 1;
1828 else if (local_got_refcounts
!= NULL
)
1830 if (local_got_refcounts
[r_symndx
] > 0)
1831 local_got_refcounts
[r_symndx
] -= 1;
1844 if (h
->plt
.refcount
> 0)
1845 h
->plt
.refcount
-= 1;
1857 /* Adjust a symbol defined by a dynamic object and referenced by a
1858 regular object. The current definition is in some section of the
1859 dynamic object, but we're not including those sections. We have to
1860 change the definition to something the rest of the link can
1864 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1865 struct elf_link_hash_entry
*h
)
1867 struct elf_i386_link_hash_table
*htab
;
1870 /* STT_GNU_IFUNC symbol must go through PLT. */
1871 if (h
->type
== STT_GNU_IFUNC
)
1873 if (h
->plt
.refcount
<= 0)
1875 h
->plt
.offset
= (bfd_vma
) -1;
1881 /* If this is a function, put it in the procedure linkage table. We
1882 will fill in the contents of the procedure linkage table later,
1883 when we know the address of the .got section. */
1884 if (h
->type
== STT_FUNC
1887 if (h
->plt
.refcount
<= 0
1888 || SYMBOL_CALLS_LOCAL (info
, h
)
1889 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1890 && h
->root
.type
== bfd_link_hash_undefweak
))
1892 /* This case can occur if we saw a PLT32 reloc in an input
1893 file, but the symbol was never referred to by a dynamic
1894 object, or if all references were garbage collected. In
1895 such a case, we don't actually need to build a procedure
1896 linkage table, and we can just do a PC32 reloc instead. */
1897 h
->plt
.offset
= (bfd_vma
) -1;
1904 /* It's possible that we incorrectly decided a .plt reloc was
1905 needed for an R_386_PC32 reloc to a non-function sym in
1906 check_relocs. We can't decide accurately between function and
1907 non-function syms in check-relocs; Objects loaded later in
1908 the link may change h->type. So fix it now. */
1909 h
->plt
.offset
= (bfd_vma
) -1;
1911 /* If this is a weak symbol, and there is a real definition, the
1912 processor independent code will have arranged for us to see the
1913 real definition first, and we can just use the same value. */
1914 if (h
->u
.weakdef
!= NULL
)
1916 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1917 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1918 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1919 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1920 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1921 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1925 /* This is a reference to a symbol defined by a dynamic object which
1926 is not a function. */
1928 /* If we are creating a shared library, we must presume that the
1929 only references to the symbol are via the global offset table.
1930 For such cases we need not do anything here; the relocations will
1931 be handled correctly by relocate_section. */
1935 /* If there are no references to this symbol that do not use the
1936 GOT, we don't need to generate a copy reloc. */
1937 if (!h
->non_got_ref
)
1940 /* If -z nocopyreloc was given, we won't generate them either. */
1941 if (info
->nocopyreloc
)
1947 htab
= elf_i386_hash_table (info
);
1949 /* If there aren't any dynamic relocs in read-only sections, then
1950 we can keep the dynamic relocs and avoid the copy reloc. This
1951 doesn't work on VxWorks, where we can not have dynamic relocations
1952 (other than copy and jump slot relocations) in an executable. */
1953 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1955 struct elf_i386_link_hash_entry
* eh
;
1956 struct elf_dyn_relocs
*p
;
1958 eh
= (struct elf_i386_link_hash_entry
*) h
;
1959 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1961 s
= p
->sec
->output_section
;
1962 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1975 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1976 h
->root
.root
.string
);
1980 /* We must allocate the symbol in our .dynbss section, which will
1981 become part of the .bss section of the executable. There will be
1982 an entry for this symbol in the .dynsym section. The dynamic
1983 object will contain position independent code, so all references
1984 from the dynamic object to this symbol will go through the global
1985 offset table. The dynamic linker will use the .dynsym entry to
1986 determine the address it must put in the global offset table, so
1987 both the dynamic object and the regular object will refer to the
1988 same memory location for the variable. */
1990 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1991 copy the initial value out of the dynamic object and into the
1992 runtime process image. */
1993 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1995 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2001 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2004 /* Allocate space in .plt, .got and associated reloc sections for
2008 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2010 struct bfd_link_info
*info
;
2011 struct elf_i386_link_hash_table
*htab
;
2012 struct elf_i386_link_hash_entry
*eh
;
2013 struct elf_dyn_relocs
*p
;
2015 if (h
->root
.type
== bfd_link_hash_indirect
)
2018 if (h
->root
.type
== bfd_link_hash_warning
)
2019 /* When warning symbols are created, they **replace** the "real"
2020 entry in the hash table, thus we never get to see the real
2021 symbol in a hash traversal. So look at it now. */
2022 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2023 eh
= (struct elf_i386_link_hash_entry
*) h
;
2025 info
= (struct bfd_link_info
*) inf
;
2026 htab
= elf_i386_hash_table (info
);
2028 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2029 here if it is defined and referenced in a non-shared object. */
2030 if (h
->type
== STT_GNU_IFUNC
2032 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
,
2035 else if (htab
->elf
.dynamic_sections_created
2036 && h
->plt
.refcount
> 0)
2038 /* Make sure this symbol is output as a dynamic symbol.
2039 Undefined weak syms won't yet be marked as dynamic. */
2040 if (h
->dynindx
== -1
2041 && !h
->forced_local
)
2043 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2048 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2050 asection
*s
= htab
->elf
.splt
;
2052 /* If this is the first .plt entry, make room for the special
2055 s
->size
+= PLT_ENTRY_SIZE
;
2057 h
->plt
.offset
= s
->size
;
2059 /* If this symbol is not defined in a regular file, and we are
2060 not generating a shared library, then set the symbol to this
2061 location in the .plt. This is required to make function
2062 pointers compare as equal between the normal executable and
2063 the shared library. */
2067 h
->root
.u
.def
.section
= s
;
2068 h
->root
.u
.def
.value
= h
->plt
.offset
;
2071 /* Make room for this entry. */
2072 s
->size
+= PLT_ENTRY_SIZE
;
2074 /* We also need to make an entry in the .got.plt section, which
2075 will be placed in the .got section by the linker script. */
2076 htab
->elf
.sgotplt
->size
+= 4;
2078 /* We also need to make an entry in the .rel.plt section. */
2079 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2080 htab
->next_tls_desc_index
++;
2082 if (htab
->is_vxworks
&& !info
->shared
)
2084 /* VxWorks has a second set of relocations for each PLT entry
2085 in executables. They go in a separate relocation section,
2086 which is processed by the kernel loader. */
2088 /* There are two relocations for the initial PLT entry: an
2089 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2090 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2092 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
2093 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2095 /* There are two extra relocations for each subsequent PLT entry:
2096 an R_386_32 relocation for the GOT entry, and an R_386_32
2097 relocation for the PLT entry. */
2099 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2104 h
->plt
.offset
= (bfd_vma
) -1;
2110 h
->plt
.offset
= (bfd_vma
) -1;
2114 eh
->tlsdesc_got
= (bfd_vma
) -1;
2116 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2117 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2118 if (h
->got
.refcount
> 0
2121 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2122 h
->got
.offset
= (bfd_vma
) -1;
2123 else if (h
->got
.refcount
> 0)
2127 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2129 /* Make sure this symbol is output as a dynamic symbol.
2130 Undefined weak syms won't yet be marked as dynamic. */
2131 if (h
->dynindx
== -1
2132 && !h
->forced_local
)
2134 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2139 if (GOT_TLS_GDESC_P (tls_type
))
2141 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2142 - elf_i386_compute_jump_table_size (htab
);
2143 htab
->elf
.sgotplt
->size
+= 8;
2144 h
->got
.offset
= (bfd_vma
) -2;
2146 if (! GOT_TLS_GDESC_P (tls_type
)
2147 || GOT_TLS_GD_P (tls_type
))
2149 h
->got
.offset
= s
->size
;
2151 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2152 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2155 dyn
= htab
->elf
.dynamic_sections_created
;
2156 /* R_386_TLS_IE_32 needs one dynamic relocation,
2157 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2158 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2159 need two), R_386_TLS_GD needs one if local symbol and two if
2161 if (tls_type
== GOT_TLS_IE_BOTH
)
2162 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2163 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2164 || (tls_type
& GOT_TLS_IE
))
2165 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2166 else if (GOT_TLS_GD_P (tls_type
))
2167 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2168 else if (! GOT_TLS_GDESC_P (tls_type
)
2169 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2170 || h
->root
.type
!= bfd_link_hash_undefweak
)
2172 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2173 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2174 if (GOT_TLS_GDESC_P (tls_type
))
2175 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2178 h
->got
.offset
= (bfd_vma
) -1;
2180 if (eh
->dyn_relocs
== NULL
)
2183 /* In the shared -Bsymbolic case, discard space allocated for
2184 dynamic pc-relative relocs against symbols which turn out to be
2185 defined in regular objects. For the normal shared case, discard
2186 space for pc-relative relocs that have become local due to symbol
2187 visibility changes. */
2191 /* The only reloc that uses pc_count is R_386_PC32, which will
2192 appear on a call or on something like ".long foo - .". We
2193 want calls to protected symbols to resolve directly to the
2194 function rather than going via the plt. If people want
2195 function pointer comparisons to work as expected then they
2196 should avoid writing assembly like ".long foo - .". */
2197 if (SYMBOL_CALLS_LOCAL (info
, h
))
2199 struct elf_dyn_relocs
**pp
;
2201 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2203 p
->count
-= p
->pc_count
;
2212 if (htab
->is_vxworks
)
2214 struct elf_dyn_relocs
**pp
;
2215 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2217 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2224 /* Also discard relocs on undefined weak syms with non-default
2226 if (eh
->dyn_relocs
!= NULL
2227 && h
->root
.type
== bfd_link_hash_undefweak
)
2229 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2230 eh
->dyn_relocs
= NULL
;
2232 /* Make sure undefined weak symbols are output as a dynamic
2234 else if (h
->dynindx
== -1
2235 && !h
->forced_local
)
2237 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2242 else if (ELIMINATE_COPY_RELOCS
)
2244 /* For the non-shared case, discard space for relocs against
2245 symbols which turn out to need copy relocs or are not
2251 || (htab
->elf
.dynamic_sections_created
2252 && (h
->root
.type
== bfd_link_hash_undefweak
2253 || h
->root
.type
== bfd_link_hash_undefined
))))
2255 /* Make sure this symbol is output as a dynamic symbol.
2256 Undefined weak syms won't yet be marked as dynamic. */
2257 if (h
->dynindx
== -1
2258 && !h
->forced_local
)
2260 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2264 /* If that succeeded, we know we'll be keeping all the
2266 if (h
->dynindx
!= -1)
2270 eh
->dyn_relocs
= NULL
;
2275 /* Finally, allocate space. */
2276 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2280 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2282 BFD_ASSERT (sreloc
!= NULL
);
2283 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2289 /* Allocate space in .plt, .got and associated reloc sections for
2290 local dynamic relocs. */
2293 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2295 struct elf_link_hash_entry
*h
2296 = (struct elf_link_hash_entry
*) *slot
;
2298 if (h
->type
!= STT_GNU_IFUNC
2302 || h
->root
.type
!= bfd_link_hash_defined
)
2305 return elf_i386_allocate_dynrelocs (h
, inf
);
2308 /* Find any dynamic relocs that apply to read-only sections. */
2311 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2313 struct elf_i386_link_hash_entry
*eh
;
2314 struct elf_dyn_relocs
*p
;
2316 if (h
->root
.type
== bfd_link_hash_warning
)
2317 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2319 eh
= (struct elf_i386_link_hash_entry
*) h
;
2320 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2322 asection
*s
= p
->sec
->output_section
;
2324 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2326 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2328 info
->flags
|= DF_TEXTREL
;
2330 /* Not an error, just cut short the traversal. */
2337 /* Set the sizes of the dynamic sections. */
2340 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2341 struct bfd_link_info
*info
)
2343 struct elf_i386_link_hash_table
*htab
;
2349 htab
= elf_i386_hash_table (info
);
2350 dynobj
= htab
->elf
.dynobj
;
2354 if (htab
->elf
.dynamic_sections_created
)
2356 /* Set the contents of the .interp section to the interpreter. */
2357 if (info
->executable
)
2359 s
= bfd_get_section_by_name (dynobj
, ".interp");
2362 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2363 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2367 /* Set up .got offsets for local syms, and space for local dynamic
2369 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2371 bfd_signed_vma
*local_got
;
2372 bfd_signed_vma
*end_local_got
;
2373 char *local_tls_type
;
2374 bfd_vma
*local_tlsdesc_gotent
;
2375 bfd_size_type locsymcount
;
2376 Elf_Internal_Shdr
*symtab_hdr
;
2379 if (! is_i386_elf (ibfd
))
2382 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2384 struct elf_dyn_relocs
*p
;
2386 for (p
= ((struct elf_dyn_relocs
*)
2387 elf_section_data (s
)->local_dynrel
);
2391 if (!bfd_is_abs_section (p
->sec
)
2392 && bfd_is_abs_section (p
->sec
->output_section
))
2394 /* Input section has been discarded, either because
2395 it is a copy of a linkonce section or due to
2396 linker script /DISCARD/, so we'll be discarding
2399 else if (htab
->is_vxworks
2400 && strcmp (p
->sec
->output_section
->name
,
2403 /* Relocations in vxworks .tls_vars sections are
2404 handled specially by the loader. */
2406 else if (p
->count
!= 0)
2408 srel
= elf_section_data (p
->sec
)->sreloc
;
2409 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2410 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2411 info
->flags
|= DF_TEXTREL
;
2416 local_got
= elf_local_got_refcounts (ibfd
);
2420 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2421 locsymcount
= symtab_hdr
->sh_info
;
2422 end_local_got
= local_got
+ locsymcount
;
2423 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2424 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2426 srel
= htab
->elf
.srelgot
;
2427 for (; local_got
< end_local_got
;
2428 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2430 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2433 if (GOT_TLS_GDESC_P (*local_tls_type
))
2435 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2436 - elf_i386_compute_jump_table_size (htab
);
2437 htab
->elf
.sgotplt
->size
+= 8;
2438 *local_got
= (bfd_vma
) -2;
2440 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2441 || GOT_TLS_GD_P (*local_tls_type
))
2443 *local_got
= s
->size
;
2445 if (GOT_TLS_GD_P (*local_tls_type
)
2446 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2450 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2451 || (*local_tls_type
& GOT_TLS_IE
))
2453 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2454 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2455 else if (GOT_TLS_GD_P (*local_tls_type
)
2456 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2457 srel
->size
+= sizeof (Elf32_External_Rel
);
2458 if (GOT_TLS_GDESC_P (*local_tls_type
))
2459 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2463 *local_got
= (bfd_vma
) -1;
2467 if (htab
->tls_ldm_got
.refcount
> 0)
2469 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2471 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2472 htab
->elf
.sgot
->size
+= 8;
2473 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2476 htab
->tls_ldm_got
.offset
= -1;
2478 /* Allocate global sym .plt and .got entries, and space for global
2479 sym dynamic relocs. */
2480 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2482 /* Allocate .plt and .got entries, and space for local symbols. */
2483 htab_traverse (htab
->loc_hash_table
,
2484 elf_i386_allocate_local_dynrelocs
,
2487 /* For every jump slot reserved in the sgotplt, reloc_count is
2488 incremented. However, when we reserve space for TLS descriptors,
2489 it's not incremented, so in order to compute the space reserved
2490 for them, it suffices to multiply the reloc count by the jump
2492 if (htab
->elf
.srelplt
)
2493 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2495 /* We now have determined the sizes of the various dynamic sections.
2496 Allocate memory for them. */
2498 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2500 bfd_boolean strip_section
= TRUE
;
2502 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2505 if (s
== htab
->elf
.splt
2506 || s
== htab
->elf
.sgot
2507 || s
== htab
->elf
.sgotplt
2508 || s
== htab
->elf
.iplt
2509 || s
== htab
->elf
.igotplt
2510 || s
== htab
->sdynbss
)
2512 /* Strip this section if we don't need it; see the
2514 /* We'd like to strip these sections if they aren't needed, but if
2515 we've exported dynamic symbols from them we must leave them.
2516 It's too late to tell BFD to get rid of the symbols. */
2518 if (htab
->elf
.hplt
!= NULL
)
2519 strip_section
= FALSE
;
2521 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2524 && s
!= htab
->elf
.srelplt
2525 && s
!= htab
->srelplt2
)
2528 /* We use the reloc_count field as a counter if we need
2529 to copy relocs into the output file. */
2534 /* It's not one of our sections, so don't allocate space. */
2540 /* If we don't need this section, strip it from the
2541 output file. This is mostly to handle .rel.bss and
2542 .rel.plt. We must create both sections in
2543 create_dynamic_sections, because they must be created
2544 before the linker maps input sections to output
2545 sections. The linker does that before
2546 adjust_dynamic_symbol is called, and it is that
2547 function which decides whether anything needs to go
2548 into these sections. */
2550 s
->flags
|= SEC_EXCLUDE
;
2554 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2557 /* Allocate memory for the section contents. We use bfd_zalloc
2558 here in case unused entries are not reclaimed before the
2559 section's contents are written out. This should not happen,
2560 but this way if it does, we get a R_386_NONE reloc instead
2562 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2563 if (s
->contents
== NULL
)
2567 if (htab
->elf
.dynamic_sections_created
)
2569 /* Add some entries to the .dynamic section. We fill in the
2570 values later, in elf_i386_finish_dynamic_sections, but we
2571 must add the entries now so that we get the correct size for
2572 the .dynamic section. The DT_DEBUG entry is filled in by the
2573 dynamic linker and used by the debugger. */
2574 #define add_dynamic_entry(TAG, VAL) \
2575 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2577 if (info
->executable
)
2579 if (!add_dynamic_entry (DT_DEBUG
, 0))
2583 if (htab
->elf
.splt
->size
!= 0)
2585 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2586 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2587 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2588 || !add_dynamic_entry (DT_JMPREL
, 0))
2594 if (!add_dynamic_entry (DT_REL
, 0)
2595 || !add_dynamic_entry (DT_RELSZ
, 0)
2596 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2599 /* If any dynamic relocs apply to a read-only section,
2600 then we need a DT_TEXTREL entry. */
2601 if ((info
->flags
& DF_TEXTREL
) == 0)
2602 elf_link_hash_traverse (&htab
->elf
,
2603 elf_i386_readonly_dynrelocs
, info
);
2605 if ((info
->flags
& DF_TEXTREL
) != 0)
2607 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2611 if (htab
->is_vxworks
2612 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2615 #undef add_dynamic_entry
2621 elf_i386_always_size_sections (bfd
*output_bfd
,
2622 struct bfd_link_info
*info
)
2624 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2628 struct elf_link_hash_entry
*tlsbase
;
2630 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2631 "_TLS_MODULE_BASE_",
2632 FALSE
, FALSE
, FALSE
);
2634 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2636 struct bfd_link_hash_entry
*bh
= NULL
;
2637 const struct elf_backend_data
*bed
2638 = get_elf_backend_data (output_bfd
);
2640 if (!(_bfd_generic_link_add_one_symbol
2641 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2642 tls_sec
, 0, NULL
, FALSE
,
2643 bed
->collect
, &bh
)))
2646 elf_i386_hash_table (info
)->tls_module_base
= bh
;
2648 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2649 tlsbase
->def_regular
= 1;
2650 tlsbase
->other
= STV_HIDDEN
;
2651 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2658 /* Set the correct type for an x86 ELF section. We do this by the
2659 section name, which is a hack, but ought to work. */
2662 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2663 Elf_Internal_Shdr
*hdr
,
2666 register const char *name
;
2668 name
= bfd_get_section_name (abfd
, sec
);
2670 /* This is an ugly, but unfortunately necessary hack that is
2671 needed when producing EFI binaries on x86. It tells
2672 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2673 containing ELF relocation info. We need this hack in order to
2674 be able to generate ELF binaries that can be translated into
2675 EFI applications (which are essentially COFF objects). Those
2676 files contain a COFF ".reloc" section inside an ELFNN object,
2677 which would normally cause BFD to segfault because it would
2678 attempt to interpret this section as containing relocation
2679 entries for section "oc". With this hack enabled, ".reloc"
2680 will be treated as a normal data section, which will avoid the
2681 segfault. However, you won't be able to create an ELFNN binary
2682 with a section named "oc" that needs relocations, but that's
2683 the kind of ugly side-effects you get when detecting section
2684 types based on their names... In practice, this limitation is
2685 unlikely to bite. */
2686 if (strcmp (name
, ".reloc") == 0)
2687 hdr
->sh_type
= SHT_PROGBITS
;
2692 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2693 executables. Rather than setting it to the beginning of the TLS
2694 section, we have to set it to the end. This function may be called
2695 multiple times, it is idempotent. */
2698 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
2700 struct bfd_link_hash_entry
*base
;
2702 if (!info
->executable
)
2705 base
= elf_i386_hash_table (info
)->tls_module_base
;
2710 base
->u
.def
.value
= elf_hash_table (info
)->tls_size
;
2713 /* Return the base VMA address which should be subtracted from real addresses
2714 when resolving @dtpoff relocation.
2715 This is PT_TLS segment p_vaddr. */
2718 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
2720 /* If tls_sec is NULL, we should have signalled an error already. */
2721 if (elf_hash_table (info
)->tls_sec
== NULL
)
2723 return elf_hash_table (info
)->tls_sec
->vma
;
2726 /* Return the relocation value for @tpoff relocation
2727 if STT_TLS virtual address is ADDRESS. */
2730 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2732 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2734 /* If tls_sec is NULL, we should have signalled an error already. */
2735 if (htab
->tls_sec
== NULL
)
2737 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2740 /* Relocate an i386 ELF section. */
2743 elf_i386_relocate_section (bfd
*output_bfd
,
2744 struct bfd_link_info
*info
,
2746 asection
*input_section
,
2748 Elf_Internal_Rela
*relocs
,
2749 Elf_Internal_Sym
*local_syms
,
2750 asection
**local_sections
)
2752 struct elf_i386_link_hash_table
*htab
;
2753 Elf_Internal_Shdr
*symtab_hdr
;
2754 struct elf_link_hash_entry
**sym_hashes
;
2755 bfd_vma
*local_got_offsets
;
2756 bfd_vma
*local_tlsdesc_gotents
;
2757 Elf_Internal_Rela
*rel
;
2758 Elf_Internal_Rela
*relend
;
2759 bfd_boolean is_vxworks_tls
;
2761 BFD_ASSERT (is_i386_elf (input_bfd
));
2763 htab
= elf_i386_hash_table (info
);
2764 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2765 sym_hashes
= elf_sym_hashes (input_bfd
);
2766 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2767 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2768 /* We have to handle relocations in vxworks .tls_vars sections
2769 specially, because the dynamic loader is 'weird'. */
2770 is_vxworks_tls
= (htab
->is_vxworks
&& info
->shared
2771 && !strcmp (input_section
->output_section
->name
,
2774 elf_i386_set_tls_module_base (info
);
2777 relend
= relocs
+ input_section
->reloc_count
;
2778 for (; rel
< relend
; rel
++)
2780 unsigned int r_type
;
2781 reloc_howto_type
*howto
;
2782 unsigned long r_symndx
;
2783 struct elf_link_hash_entry
*h
;
2784 Elf_Internal_Sym
*sym
;
2786 bfd_vma off
, offplt
;
2788 bfd_boolean unresolved_reloc
;
2789 bfd_reloc_status_type r
;
2793 r_type
= ELF32_R_TYPE (rel
->r_info
);
2794 if (r_type
== R_386_GNU_VTINHERIT
2795 || r_type
== R_386_GNU_VTENTRY
)
2798 if ((indx
= r_type
) >= R_386_standard
2799 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2800 >= R_386_ext
- R_386_standard
)
2801 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2802 >= R_386_irelative
- R_386_ext
))
2804 (*_bfd_error_handler
)
2805 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2806 input_bfd
, input_section
, r_type
);
2807 bfd_set_error (bfd_error_bad_value
);
2810 howto
= elf_howto_table
+ indx
;
2812 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2816 unresolved_reloc
= FALSE
;
2817 if (r_symndx
< symtab_hdr
->sh_info
)
2819 sym
= local_syms
+ r_symndx
;
2820 sec
= local_sections
[r_symndx
];
2821 relocation
= (sec
->output_section
->vma
2822 + sec
->output_offset
2825 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2826 && ((sec
->flags
& SEC_MERGE
) != 0
2827 || (info
->relocatable
2828 && sec
->output_offset
!= 0)))
2831 bfd_byte
*where
= contents
+ rel
->r_offset
;
2833 switch (howto
->size
)
2836 addend
= bfd_get_8 (input_bfd
, where
);
2837 if (howto
->pc_relative
)
2839 addend
= (addend
^ 0x80) - 0x80;
2844 addend
= bfd_get_16 (input_bfd
, where
);
2845 if (howto
->pc_relative
)
2847 addend
= (addend
^ 0x8000) - 0x8000;
2852 addend
= bfd_get_32 (input_bfd
, where
);
2853 if (howto
->pc_relative
)
2855 addend
= (addend
^ 0x80000000) - 0x80000000;
2863 if (info
->relocatable
)
2864 addend
+= sec
->output_offset
;
2867 asection
*msec
= sec
;
2868 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2870 addend
-= relocation
;
2871 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2874 switch (howto
->size
)
2877 /* FIXME: overflow checks. */
2878 if (howto
->pc_relative
)
2880 bfd_put_8 (input_bfd
, addend
, where
);
2883 if (howto
->pc_relative
)
2885 bfd_put_16 (input_bfd
, addend
, where
);
2888 if (howto
->pc_relative
)
2890 bfd_put_32 (input_bfd
, addend
, where
);
2894 else if (ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2896 /* Relocate against local STT_GNU_IFUNC symbol. */
2897 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
,
2902 /* Set STT_GNU_IFUNC symbol value. */
2903 h
->root
.u
.def
.value
= sym
->st_value
;
2904 h
->root
.u
.def
.section
= sec
;
2911 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2912 r_symndx
, symtab_hdr
, sym_hashes
,
2914 unresolved_reloc
, warned
);
2917 if (sec
!= NULL
&& elf_discarded_section (sec
))
2919 /* For relocs against symbols from removed linkonce sections,
2920 or sections discarded by a linker script, we just want the
2921 section contents zeroed. Avoid any special processing. */
2922 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2928 if (info
->relocatable
)
2931 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
2932 it here if it is defined in a non-shared object. */
2934 && h
->type
== STT_GNU_IFUNC
2937 asection
*plt
, *gotplt
, *base_got
;
2940 if ((input_section
->flags
& SEC_ALLOC
) == 0
2941 || h
->plt
.offset
== (bfd_vma
) -1)
2944 /* STT_GNU_IFUNC symbol must go through PLT. */
2945 if (htab
->elf
.splt
!= NULL
)
2947 plt
= htab
->elf
.splt
;
2948 gotplt
= htab
->elf
.sgotplt
;
2952 plt
= htab
->elf
.iplt
;
2953 gotplt
= htab
->elf
.igotplt
;
2956 relocation
= (plt
->output_section
->vma
2957 + plt
->output_offset
+ h
->plt
.offset
);
2962 (*_bfd_error_handler
)
2963 (_("%B: relocation %s against STT_GNU_IFUNC "
2964 "symbol `%s' isn't handled by %s"), input_bfd
,
2965 elf_howto_table
[r_type
].name
,
2966 (h
->root
.root
.string
2967 ? h
->root
.root
.string
: "a local symbol"),
2969 bfd_set_error (bfd_error_bad_value
);
2973 /* Generate dynamic relcoation only when there is a
2974 non-GOF reference in a shared object. */
2975 if (info
->shared
&& h
->non_got_ref
)
2977 Elf_Internal_Rela outrel
;
2982 /* Need a dynamic relocation to get the real function
2984 offset
= _bfd_elf_section_offset (output_bfd
,
2988 if (offset
== (bfd_vma
) -1
2989 || offset
== (bfd_vma
) -2)
2992 outrel
.r_offset
= (input_section
->output_section
->vma
2993 + input_section
->output_offset
2996 if (h
->dynindx
== -1
2998 || info
->executable
)
3000 /* This symbol is resolved locally. */
3001 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3002 bfd_put_32 (output_bfd
,
3003 (h
->root
.u
.def
.value
3004 + h
->root
.u
.def
.section
->output_section
->vma
3005 + h
->root
.u
.def
.section
->output_offset
),
3009 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3011 sreloc
= htab
->elf
.irelifunc
;
3012 loc
= sreloc
->contents
;
3013 loc
+= (sreloc
->reloc_count
++
3014 * sizeof (Elf32_External_Rel
));
3015 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3017 /* If this reloc is against an external symbol, we
3018 do not want to fiddle with the addend. Otherwise,
3019 we need to include the symbol value so that it
3020 becomes an addend for the dynamic reloc. For an
3021 internal symbol, we have updated addend. */
3030 base_got
= htab
->elf
.sgot
;
3031 off
= h
->got
.offset
;
3033 if (base_got
== NULL
)
3036 if (off
== (bfd_vma
) -1)
3038 /* We can't use h->got.offset here to save state, or
3039 even just remember the offset, as finish_dynamic_symbol
3040 would use that as offset into .got. */
3042 if (htab
->elf
.splt
!= NULL
)
3044 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3045 off
= (plt_index
+ 3) * 4;
3046 base_got
= htab
->elf
.sgotplt
;
3050 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
3051 off
= plt_index
* 4;
3052 base_got
= htab
->elf
.igotplt
;
3055 if (h
->dynindx
== -1
3059 /* This references the local defitionion. We must
3060 initialize this entry in the global offset table.
3061 Since the offset must always be a multiple of 8,
3062 we use the least significant bit to record
3063 whether we have initialized it already.
3065 When doing a dynamic link, we create a .rela.got
3066 relocation entry to initialize the value. This
3067 is done in the finish_dynamic_symbol routine. */
3072 bfd_put_32 (output_bfd
, relocation
,
3073 base_got
->contents
+ off
);
3080 /* Adjust for static executables. */
3081 if (htab
->elf
.splt
== NULL
)
3082 relocation
+= gotplt
->output_offset
;
3086 relocation
= (base_got
->output_section
->vma
3087 + base_got
->output_offset
+ off
3088 - gotplt
->output_section
->vma
3089 - gotplt
->output_offset
);
3090 /* Adjust for static executables. */
3091 if (htab
->elf
.splt
== NULL
)
3092 relocation
+= gotplt
->output_offset
;
3098 relocation
-= (gotplt
->output_section
->vma
3099 + gotplt
->output_offset
);
3107 /* Relocation is to the entry for this symbol in the global
3109 if (htab
->elf
.sgot
== NULL
)
3116 off
= h
->got
.offset
;
3117 dyn
= htab
->elf
.dynamic_sections_created
;
3118 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3120 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3121 || (ELF_ST_VISIBILITY (h
->other
)
3122 && h
->root
.type
== bfd_link_hash_undefweak
))
3124 /* This is actually a static link, or it is a
3125 -Bsymbolic link and the symbol is defined
3126 locally, or the symbol was forced to be local
3127 because of a version file. We must initialize
3128 this entry in the global offset table. Since the
3129 offset must always be a multiple of 4, we use the
3130 least significant bit to record whether we have
3131 initialized it already.
3133 When doing a dynamic link, we create a .rel.got
3134 relocation entry to initialize the value. This
3135 is done in the finish_dynamic_symbol routine. */
3140 bfd_put_32 (output_bfd
, relocation
,
3141 htab
->elf
.sgot
->contents
+ off
);
3146 unresolved_reloc
= FALSE
;
3150 if (local_got_offsets
== NULL
)
3153 off
= local_got_offsets
[r_symndx
];
3155 /* The offset must always be a multiple of 4. We use
3156 the least significant bit to record whether we have
3157 already generated the necessary reloc. */
3162 bfd_put_32 (output_bfd
, relocation
,
3163 htab
->elf
.sgot
->contents
+ off
);
3168 Elf_Internal_Rela outrel
;
3171 s
= htab
->elf
.srelgot
;
3175 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3176 + htab
->elf
.sgot
->output_offset
3178 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3180 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3181 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3184 local_got_offsets
[r_symndx
] |= 1;
3188 if (off
>= (bfd_vma
) -2)
3191 relocation
= htab
->elf
.sgot
->output_section
->vma
3192 + htab
->elf
.sgot
->output_offset
+ off
3193 - htab
->elf
.sgotplt
->output_section
->vma
3194 - htab
->elf
.sgotplt
->output_offset
;
3198 /* Relocation is relative to the start of the global offset
3201 /* Check to make sure it isn't a protected function symbol
3202 for shared library since it may not be local when used
3203 as function address. We also need to make sure that a
3204 symbol is defined locally. */
3205 if (info
->shared
&& h
)
3207 if (!h
->def_regular
)
3211 switch (ELF_ST_VISIBILITY (h
->other
))
3214 v
= _("hidden symbol");
3217 v
= _("internal symbol");
3220 v
= _("protected symbol");
3227 (*_bfd_error_handler
)
3228 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3229 input_bfd
, v
, h
->root
.root
.string
);
3230 bfd_set_error (bfd_error_bad_value
);
3233 else if (!info
->executable
3234 && h
->type
== STT_FUNC
3235 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3237 (*_bfd_error_handler
)
3238 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3239 input_bfd
, h
->root
.root
.string
);
3240 bfd_set_error (bfd_error_bad_value
);
3245 /* Note that sgot is not involved in this
3246 calculation. We always want the start of .got.plt. If we
3247 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3248 permitted by the ABI, we might have to change this
3250 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3251 + htab
->elf
.sgotplt
->output_offset
;
3255 /* Use global offset table as symbol value. */
3256 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3257 + htab
->elf
.sgotplt
->output_offset
;
3258 unresolved_reloc
= FALSE
;
3262 /* Relocation is to the entry for this symbol in the
3263 procedure linkage table. */
3265 /* Resolve a PLT32 reloc against a local symbol directly,
3266 without using the procedure linkage table. */
3270 if (h
->plt
.offset
== (bfd_vma
) -1
3271 || htab
->elf
.splt
== NULL
)
3273 /* We didn't make a PLT entry for this symbol. This
3274 happens when statically linking PIC code, or when
3275 using -Bsymbolic. */
3279 relocation
= (htab
->elf
.splt
->output_section
->vma
3280 + htab
->elf
.splt
->output_offset
3282 unresolved_reloc
= FALSE
;
3287 if ((input_section
->flags
& SEC_ALLOC
) == 0
3293 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3294 || h
->root
.type
!= bfd_link_hash_undefweak
)
3295 && (r_type
!= R_386_PC32
3296 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3297 || (ELIMINATE_COPY_RELOCS
3304 || h
->root
.type
== bfd_link_hash_undefweak
3305 || h
->root
.type
== bfd_link_hash_undefined
)))
3307 Elf_Internal_Rela outrel
;
3309 bfd_boolean skip
, relocate
;
3312 /* When generating a shared object, these relocations
3313 are copied into the output file to be resolved at run
3320 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3322 if (outrel
.r_offset
== (bfd_vma
) -1)
3324 else if (outrel
.r_offset
== (bfd_vma
) -2)
3325 skip
= TRUE
, relocate
= TRUE
;
3326 outrel
.r_offset
+= (input_section
->output_section
->vma
3327 + input_section
->output_offset
);
3330 memset (&outrel
, 0, sizeof outrel
);
3333 && (r_type
== R_386_PC32
3335 || !SYMBOLIC_BIND (info
, h
)
3336 || !h
->def_regular
))
3337 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3340 /* This symbol is local, or marked to become local. */
3342 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3345 sreloc
= elf_section_data (input_section
)->sreloc
;
3347 BFD_ASSERT (sreloc
!= NULL
&& sreloc
->contents
!= NULL
);
3349 loc
= sreloc
->contents
;
3350 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3352 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3354 /* If this reloc is against an external symbol, we do
3355 not want to fiddle with the addend. Otherwise, we
3356 need to include the symbol value so that it becomes
3357 an addend for the dynamic reloc. */
3366 Elf_Internal_Rela outrel
;
3370 outrel
.r_offset
= rel
->r_offset
3371 + input_section
->output_section
->vma
3372 + input_section
->output_offset
;
3373 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3374 sreloc
= elf_section_data (input_section
)->sreloc
;
3377 loc
= sreloc
->contents
;
3378 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3379 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3384 case R_386_TLS_GOTDESC
:
3385 case R_386_TLS_DESC_CALL
:
3386 case R_386_TLS_IE_32
:
3387 case R_386_TLS_GOTIE
:
3388 tls_type
= GOT_UNKNOWN
;
3389 if (h
== NULL
&& local_got_offsets
)
3390 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3392 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3393 if (tls_type
== GOT_TLS_IE
)
3394 tls_type
= GOT_TLS_IE_NEG
;
3396 if (! elf_i386_tls_transition (info
, input_bfd
,
3397 input_section
, contents
,
3398 symtab_hdr
, sym_hashes
,
3399 &r_type
, tls_type
, rel
,
3403 if (r_type
== R_386_TLS_LE_32
)
3405 BFD_ASSERT (! unresolved_reloc
);
3406 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3411 /* GD->LE transition. */
3412 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3415 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3417 movl %gs:0, %eax; subl $foo@tpoff, %eax
3418 (6 byte form of subl). */
3419 memcpy (contents
+ rel
->r_offset
- 3,
3420 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3421 roff
= rel
->r_offset
+ 5;
3425 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3427 movl %gs:0, %eax; subl $foo@tpoff, %eax
3428 (6 byte form of subl). */
3429 memcpy (contents
+ rel
->r_offset
- 2,
3430 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3431 roff
= rel
->r_offset
+ 6;
3433 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3435 /* Skip R_386_PC32/R_386_PLT32. */
3439 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3441 /* GDesc -> LE transition.
3442 It's originally something like:
3443 leal x@tlsdesc(%ebx), %eax
3447 Registers other than %eax may be set up here. */
3452 roff
= rel
->r_offset
;
3453 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3455 /* Now modify the instruction as appropriate. */
3456 /* aoliva FIXME: remove the above and xor the byte
3458 bfd_put_8 (output_bfd
, val
^ 0x86,
3459 contents
+ roff
- 1);
3460 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3464 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3466 /* GDesc -> LE transition.
3474 roff
= rel
->r_offset
;
3475 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3476 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3479 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3483 /* IE->LE transition:
3484 Originally it can be one of:
3492 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3495 /* movl foo, %eax. */
3496 bfd_put_8 (output_bfd
, 0xb8,
3497 contents
+ rel
->r_offset
- 1);
3503 type
= bfd_get_8 (input_bfd
,
3504 contents
+ rel
->r_offset
- 2);
3509 bfd_put_8 (output_bfd
, 0xc7,
3510 contents
+ rel
->r_offset
- 2);
3511 bfd_put_8 (output_bfd
,
3512 0xc0 | ((val
>> 3) & 7),
3513 contents
+ rel
->r_offset
- 1);
3517 bfd_put_8 (output_bfd
, 0x81,
3518 contents
+ rel
->r_offset
- 2);
3519 bfd_put_8 (output_bfd
,
3520 0xc0 | ((val
>> 3) & 7),
3521 contents
+ rel
->r_offset
- 1);
3528 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3529 contents
+ rel
->r_offset
);
3534 unsigned int val
, type
;
3536 /* {IE_32,GOTIE}->LE transition:
3537 Originally it can be one of:
3538 subl foo(%reg1), %reg2
3539 movl foo(%reg1), %reg2
3540 addl foo(%reg1), %reg2
3543 movl $foo, %reg2 (6 byte form)
3544 addl $foo, %reg2. */
3545 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3546 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3550 bfd_put_8 (output_bfd
, 0xc7,
3551 contents
+ rel
->r_offset
- 2);
3552 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3553 contents
+ rel
->r_offset
- 1);
3555 else if (type
== 0x2b)
3558 bfd_put_8 (output_bfd
, 0x81,
3559 contents
+ rel
->r_offset
- 2);
3560 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3561 contents
+ rel
->r_offset
- 1);
3563 else if (type
== 0x03)
3566 bfd_put_8 (output_bfd
, 0x81,
3567 contents
+ rel
->r_offset
- 2);
3568 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3569 contents
+ rel
->r_offset
- 1);
3573 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3574 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3575 contents
+ rel
->r_offset
);
3577 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3578 contents
+ rel
->r_offset
);
3583 if (htab
->elf
.sgot
== NULL
)
3588 off
= h
->got
.offset
;
3589 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3593 if (local_got_offsets
== NULL
)
3596 off
= local_got_offsets
[r_symndx
];
3597 offplt
= local_tlsdesc_gotents
[r_symndx
];
3604 Elf_Internal_Rela outrel
;
3609 if (htab
->elf
.srelgot
== NULL
)
3612 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3614 if (GOT_TLS_GDESC_P (tls_type
))
3616 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3617 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3618 <= htab
->elf
.sgotplt
->size
);
3619 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3620 + htab
->elf
.sgotplt
->output_offset
3622 + htab
->sgotplt_jump_table_size
);
3623 sreloc
= htab
->elf
.srelplt
;
3624 loc
= sreloc
->contents
;
3625 loc
+= (htab
->next_tls_desc_index
++
3626 * sizeof (Elf32_External_Rel
));
3627 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3628 <= sreloc
->contents
+ sreloc
->size
);
3629 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3632 BFD_ASSERT (! unresolved_reloc
);
3633 bfd_put_32 (output_bfd
,
3634 relocation
- elf_i386_dtpoff_base (info
),
3635 htab
->elf
.sgotplt
->contents
+ offplt
3636 + htab
->sgotplt_jump_table_size
+ 4);
3640 bfd_put_32 (output_bfd
, 0,
3641 htab
->elf
.sgotplt
->contents
+ offplt
3642 + htab
->sgotplt_jump_table_size
+ 4);
3646 sreloc
= htab
->elf
.srelgot
;
3648 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3649 + htab
->elf
.sgot
->output_offset
+ off
);
3651 if (GOT_TLS_GD_P (tls_type
))
3652 dr_type
= R_386_TLS_DTPMOD32
;
3653 else if (GOT_TLS_GDESC_P (tls_type
))
3655 else if (tls_type
== GOT_TLS_IE_POS
)
3656 dr_type
= R_386_TLS_TPOFF
;
3658 dr_type
= R_386_TLS_TPOFF32
;
3660 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3661 bfd_put_32 (output_bfd
,
3662 relocation
- elf_i386_dtpoff_base (info
),
3663 htab
->elf
.sgot
->contents
+ off
);
3664 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3665 bfd_put_32 (output_bfd
,
3666 elf_i386_dtpoff_base (info
) - relocation
,
3667 htab
->elf
.sgot
->contents
+ off
);
3668 else if (dr_type
!= R_386_TLS_DESC
)
3669 bfd_put_32 (output_bfd
, 0,
3670 htab
->elf
.sgot
->contents
+ off
);
3671 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3673 loc
= sreloc
->contents
;
3674 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3675 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3676 <= sreloc
->contents
+ sreloc
->size
);
3677 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3679 if (GOT_TLS_GD_P (tls_type
))
3683 BFD_ASSERT (! unresolved_reloc
);
3684 bfd_put_32 (output_bfd
,
3685 relocation
- elf_i386_dtpoff_base (info
),
3686 htab
->elf
.sgot
->contents
+ off
+ 4);
3690 bfd_put_32 (output_bfd
, 0,
3691 htab
->elf
.sgot
->contents
+ off
+ 4);
3692 outrel
.r_info
= ELF32_R_INFO (indx
,
3693 R_386_TLS_DTPOFF32
);
3694 outrel
.r_offset
+= 4;
3695 sreloc
->reloc_count
++;
3696 loc
+= sizeof (Elf32_External_Rel
);
3697 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3698 <= sreloc
->contents
+ sreloc
->size
);
3699 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3702 else if (tls_type
== GOT_TLS_IE_BOTH
)
3704 bfd_put_32 (output_bfd
,
3706 ? relocation
- elf_i386_dtpoff_base (info
)
3708 htab
->elf
.sgot
->contents
+ off
+ 4);
3709 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3710 outrel
.r_offset
+= 4;
3711 sreloc
->reloc_count
++;
3712 loc
+= sizeof (Elf32_External_Rel
);
3713 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3720 local_got_offsets
[r_symndx
] |= 1;
3723 if (off
>= (bfd_vma
) -2
3724 && ! GOT_TLS_GDESC_P (tls_type
))
3726 if (r_type
== R_386_TLS_GOTDESC
3727 || r_type
== R_386_TLS_DESC_CALL
)
3729 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3730 unresolved_reloc
= FALSE
;
3732 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3734 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
3735 + htab
->elf
.sgotplt
->output_offset
;
3736 relocation
= htab
->elf
.sgot
->output_section
->vma
3737 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
3738 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3739 && tls_type
== GOT_TLS_IE_BOTH
)
3741 if (r_type
== R_386_TLS_IE
)
3742 relocation
+= g_o_t
;
3743 unresolved_reloc
= FALSE
;
3745 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3747 unsigned int val
, type
;
3750 /* GD->IE transition. */
3751 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3752 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3755 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3757 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3759 roff
= rel
->r_offset
- 3;
3763 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3765 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3766 roff
= rel
->r_offset
- 2;
3768 memcpy (contents
+ roff
,
3769 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3770 contents
[roff
+ 7] = 0x80 | (val
& 7);
3771 /* If foo is used only with foo@gotntpoff(%reg) and
3772 foo@indntpoff, but not with foo@gottpoff(%reg), change
3773 subl $foo@gottpoff(%reg), %eax
3775 addl $foo@gotntpoff(%reg), %eax. */
3776 if (tls_type
== GOT_TLS_IE_POS
)
3777 contents
[roff
+ 6] = 0x03;
3778 bfd_put_32 (output_bfd
,
3779 htab
->elf
.sgot
->output_section
->vma
3780 + htab
->elf
.sgot
->output_offset
+ off
3781 - htab
->elf
.sgotplt
->output_section
->vma
3782 - htab
->elf
.sgotplt
->output_offset
,
3783 contents
+ roff
+ 8);
3784 /* Skip R_386_PLT32. */
3788 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3790 /* GDesc -> IE transition.
3791 It's originally something like:
3792 leal x@tlsdesc(%ebx), %eax
3795 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3797 movl x@gottpoff(%ebx), %eax # before negl %eax
3799 Registers other than %eax may be set up here. */
3803 /* First, make sure it's a leal adding ebx to a 32-bit
3804 offset into any register, although it's probably
3805 almost always going to be eax. */
3806 roff
= rel
->r_offset
;
3808 /* Now modify the instruction as appropriate. */
3809 /* To turn a leal into a movl in the form we use it, it
3810 suffices to change the first byte from 0x8d to 0x8b.
3811 aoliva FIXME: should we decide to keep the leal, all
3812 we have to do is remove the statement below, and
3813 adjust the relaxation of R_386_TLS_DESC_CALL. */
3814 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3816 if (tls_type
== GOT_TLS_IE_BOTH
)
3819 bfd_put_32 (output_bfd
,
3820 htab
->elf
.sgot
->output_section
->vma
3821 + htab
->elf
.sgot
->output_offset
+ off
3822 - htab
->elf
.sgotplt
->output_section
->vma
3823 - htab
->elf
.sgotplt
->output_offset
,
3827 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3829 /* GDesc -> IE transition.
3837 depending on how we transformed the TLS_GOTDESC above.
3842 roff
= rel
->r_offset
;
3844 /* Now modify the instruction as appropriate. */
3845 if (tls_type
!= GOT_TLS_IE_NEG
)
3848 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3849 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3854 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3855 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3865 if (! elf_i386_tls_transition (info
, input_bfd
,
3866 input_section
, contents
,
3867 symtab_hdr
, sym_hashes
,
3868 &r_type
, GOT_UNKNOWN
, rel
,
3872 if (r_type
!= R_386_TLS_LDM
)
3874 /* LD->LE transition:
3875 leal foo(%reg), %eax; call ___tls_get_addr.
3877 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3878 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
3879 memcpy (contents
+ rel
->r_offset
- 2,
3880 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3881 /* Skip R_386_PC32/R_386_PLT32. */
3886 if (htab
->elf
.sgot
== NULL
)
3889 off
= htab
->tls_ldm_got
.offset
;
3894 Elf_Internal_Rela outrel
;
3897 if (htab
->elf
.srelgot
== NULL
)
3900 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3901 + htab
->elf
.sgot
->output_offset
+ off
);
3903 bfd_put_32 (output_bfd
, 0,
3904 htab
->elf
.sgot
->contents
+ off
);
3905 bfd_put_32 (output_bfd
, 0,
3906 htab
->elf
.sgot
->contents
+ off
+ 4);
3907 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3908 loc
= htab
->elf
.srelgot
->contents
;
3909 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3910 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3911 htab
->tls_ldm_got
.offset
|= 1;
3913 relocation
= htab
->elf
.sgot
->output_section
->vma
3914 + htab
->elf
.sgot
->output_offset
+ off
3915 - htab
->elf
.sgotplt
->output_section
->vma
3916 - htab
->elf
.sgotplt
->output_offset
;
3917 unresolved_reloc
= FALSE
;
3920 case R_386_TLS_LDO_32
:
3921 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3922 relocation
-= elf_i386_dtpoff_base (info
);
3924 /* When converting LDO to LE, we must negate. */
3925 relocation
= -elf_i386_tpoff (info
, relocation
);
3928 case R_386_TLS_LE_32
:
3932 Elf_Internal_Rela outrel
;
3937 outrel
.r_offset
= rel
->r_offset
3938 + input_section
->output_section
->vma
3939 + input_section
->output_offset
;
3940 if (h
!= NULL
&& h
->dynindx
!= -1)
3944 if (r_type
== R_386_TLS_LE_32
)
3945 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3947 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3948 sreloc
= elf_section_data (input_section
)->sreloc
;
3951 loc
= sreloc
->contents
;
3952 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3953 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3956 else if (r_type
== R_386_TLS_LE_32
)
3957 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
3959 relocation
-= elf_i386_dtpoff_base (info
);
3961 else if (r_type
== R_386_TLS_LE_32
)
3962 relocation
= elf_i386_tpoff (info
, relocation
);
3964 relocation
= -elf_i386_tpoff (info
, relocation
);
3971 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3972 because such sections are not SEC_ALLOC and thus ld.so will
3973 not process them. */
3974 if (unresolved_reloc
3975 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3978 (*_bfd_error_handler
)
3979 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3982 (long) rel
->r_offset
,
3984 h
->root
.root
.string
);
3989 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3990 contents
, rel
->r_offset
,
3993 if (r
!= bfd_reloc_ok
)
3998 name
= h
->root
.root
.string
;
4001 name
= bfd_elf_string_from_elf_section (input_bfd
,
4002 symtab_hdr
->sh_link
,
4007 name
= bfd_section_name (input_bfd
, sec
);
4010 if (r
== bfd_reloc_overflow
)
4012 if (! ((*info
->callbacks
->reloc_overflow
)
4013 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4014 (bfd_vma
) 0, input_bfd
, input_section
,
4020 (*_bfd_error_handler
)
4021 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4022 input_bfd
, input_section
,
4023 (long) rel
->r_offset
, name
, (int) r
);
4032 /* Finish up dynamic symbol handling. We set the contents of various
4033 dynamic sections here. */
4036 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4037 struct bfd_link_info
*info
,
4038 struct elf_link_hash_entry
*h
,
4039 Elf_Internal_Sym
*sym
)
4041 struct elf_i386_link_hash_table
*htab
;
4043 htab
= elf_i386_hash_table (info
);
4045 if (h
->plt
.offset
!= (bfd_vma
) -1)
4049 Elf_Internal_Rela rel
;
4051 asection
*plt
, *gotplt
, *relplt
;
4053 /* When building a static executable, use .iplt, .igot.plt and
4054 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4055 if (htab
->elf
.splt
!= NULL
)
4057 plt
= htab
->elf
.splt
;
4058 gotplt
= htab
->elf
.sgotplt
;
4059 relplt
= htab
->elf
.srelplt
;
4063 plt
= htab
->elf
.iplt
;
4064 gotplt
= htab
->elf
.igotplt
;
4065 relplt
= htab
->elf
.irelplt
;
4068 /* This symbol has an entry in the procedure linkage table. Set
4071 if ((h
->dynindx
== -1
4072 && !((h
->forced_local
|| info
->executable
)
4074 && h
->type
== STT_GNU_IFUNC
))
4080 /* Get the index in the procedure linkage table which
4081 corresponds to this symbol. This is the index of this symbol
4082 in all the symbols for which we are making plt entries. The
4083 first entry in the procedure linkage table is reserved.
4085 Get the offset into the .got table of the entry that
4086 corresponds to this function. Each .got entry is 4 bytes.
4087 The first three are reserved.
4089 For static executables, we don't reserve anything. */
4091 if (plt
== htab
->elf
.splt
)
4093 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
4094 got_offset
= (plt_index
+ 3) * 4;
4098 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
4099 got_offset
= plt_index
* 4;
4102 /* Fill in the entry in the procedure linkage table. */
4105 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
4107 bfd_put_32 (output_bfd
,
4108 (gotplt
->output_section
->vma
4109 + gotplt
->output_offset
4111 plt
->contents
+ h
->plt
.offset
+ 2);
4113 if (htab
->is_vxworks
)
4115 int s
, k
, reloc_index
;
4117 /* Create the R_386_32 relocation referencing the GOT
4118 for this PLT entry. */
4120 /* S: Current slot number (zero-based). */
4121 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
4122 /* K: Number of relocations for PLTResolve. */
4124 k
= PLTRESOLVE_RELOCS_SHLIB
;
4126 k
= PLTRESOLVE_RELOCS
;
4127 /* Skip the PLTresolve relocations, and the relocations for
4128 the other PLT slots. */
4129 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4130 loc
= (htab
->srelplt2
->contents
+ reloc_index
4131 * sizeof (Elf32_External_Rel
));
4133 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4134 + htab
->elf
.splt
->output_offset
4135 + h
->plt
.offset
+ 2),
4136 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4137 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4139 /* Create the R_386_32 relocation referencing the beginning of
4140 the PLT for this GOT entry. */
4141 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4142 + htab
->elf
.sgotplt
->output_offset
4144 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4145 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4146 loc
+ sizeof (Elf32_External_Rel
));
4151 memcpy (plt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
4153 bfd_put_32 (output_bfd
, got_offset
,
4154 plt
->contents
+ h
->plt
.offset
+ 2);
4157 /* Don't fill PLT entry for static executables. */
4158 if (plt
== htab
->elf
.splt
)
4160 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4161 plt
->contents
+ h
->plt
.offset
+ 7);
4162 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
4163 plt
->contents
+ h
->plt
.offset
+ 12);
4166 /* Fill in the entry in the global offset table. */
4167 bfd_put_32 (output_bfd
,
4168 (plt
->output_section
->vma
4169 + plt
->output_offset
4172 gotplt
->contents
+ got_offset
);
4174 /* Fill in the entry in the .rel.plt section. */
4175 rel
.r_offset
= (gotplt
->output_section
->vma
4176 + gotplt
->output_offset
4178 if (h
->dynindx
== -1
4179 || ((info
->executable
4180 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4182 && h
->type
== STT_GNU_IFUNC
))
4184 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4185 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4186 in the .got.plt section. */
4187 bfd_put_32 (output_bfd
,
4188 (h
->root
.u
.def
.value
4189 + h
->root
.u
.def
.section
->output_section
->vma
4190 + h
->root
.u
.def
.section
->output_offset
),
4191 gotplt
->contents
+ got_offset
);
4192 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4195 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4196 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4197 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4199 if (!h
->def_regular
)
4201 /* Mark the symbol as undefined, rather than as defined in
4202 the .plt section. Leave the value if there were any
4203 relocations where pointer equality matters (this is a clue
4204 for the dynamic linker, to make function pointer
4205 comparisons work between an application and shared
4206 library), otherwise set it to zero. If a function is only
4207 called from a binary, there is no need to slow down
4208 shared libraries because of that. */
4209 sym
->st_shndx
= SHN_UNDEF
;
4210 if (!h
->pointer_equality_needed
)
4215 if (h
->got
.offset
!= (bfd_vma
) -1
4216 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4217 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4219 Elf_Internal_Rela rel
;
4222 /* This symbol has an entry in the global offset table. Set it
4225 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4228 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4229 + htab
->elf
.sgot
->output_offset
4230 + (h
->got
.offset
& ~(bfd_vma
) 1));
4232 /* If this is a static link, or it is a -Bsymbolic link and the
4233 symbol is defined locally or was forced to be local because
4234 of a version file, we just want to emit a RELATIVE reloc.
4235 The entry in the global offset table will already have been
4236 initialized in the relocate_section function. */
4238 && h
->type
== STT_GNU_IFUNC
)
4242 /* Generate R_386_GLOB_DAT. */
4247 if (!h
->pointer_equality_needed
)
4250 /* For non-shared object, we can't use .got.plt, which
4251 contains the real function addres if we need pointer
4252 equality. We load the GOT entry with the PLT entry. */
4253 asection
*plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4254 bfd_put_32 (output_bfd
,
4255 (plt
->output_section
->vma
4256 + plt
->output_offset
+ h
->plt
.offset
),
4257 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4261 else if (info
->shared
4262 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4264 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4265 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4269 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4271 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4272 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4273 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4276 loc
= htab
->elf
.srelgot
->contents
;
4277 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4278 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4283 Elf_Internal_Rela rel
;
4286 /* This symbol needs a copy reloc. Set it up. */
4288 if (h
->dynindx
== -1
4289 || (h
->root
.type
!= bfd_link_hash_defined
4290 && h
->root
.type
!= bfd_link_hash_defweak
)
4291 || htab
->srelbss
== NULL
)
4294 rel
.r_offset
= (h
->root
.u
.def
.value
4295 + h
->root
.u
.def
.section
->output_section
->vma
4296 + h
->root
.u
.def
.section
->output_offset
);
4297 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4298 loc
= htab
->srelbss
->contents
;
4299 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
4300 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4303 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4304 be NULL for local symbols.
4306 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4307 is relative to the ".got" section. */
4309 && (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
4310 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
)))
4311 sym
->st_shndx
= SHN_ABS
;
4316 /* Finish up local dynamic symbol handling. We set the contents of
4317 various dynamic sections here. */
4320 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4322 struct elf_link_hash_entry
*h
4323 = (struct elf_link_hash_entry
*) *slot
;
4324 struct bfd_link_info
*info
4325 = (struct bfd_link_info
*) inf
;
4327 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4331 /* Used to decide how to sort relocs in an optimal manner for the
4332 dynamic linker, before writing them out. */
4334 static enum elf_reloc_type_class
4335 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4337 switch (ELF32_R_TYPE (rela
->r_info
))
4339 case R_386_RELATIVE
:
4340 return reloc_class_relative
;
4341 case R_386_JUMP_SLOT
:
4342 return reloc_class_plt
;
4344 return reloc_class_copy
;
4346 return reloc_class_normal
;
4350 /* Finish up the dynamic sections. */
4353 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4354 struct bfd_link_info
*info
)
4356 struct elf_i386_link_hash_table
*htab
;
4360 htab
= elf_i386_hash_table (info
);
4361 dynobj
= htab
->elf
.dynobj
;
4362 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
4364 if (htab
->elf
.dynamic_sections_created
)
4366 Elf32_External_Dyn
*dyncon
, *dynconend
;
4368 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4371 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4372 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4373 for (; dyncon
< dynconend
; dyncon
++)
4375 Elf_Internal_Dyn dyn
;
4378 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4383 if (htab
->is_vxworks
4384 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4389 s
= htab
->elf
.sgotplt
;
4390 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4394 s
= htab
->elf
.srelplt
;
4395 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4399 s
= htab
->elf
.srelplt
;
4400 dyn
.d_un
.d_val
= s
->size
;
4404 /* My reading of the SVR4 ABI indicates that the
4405 procedure linkage table relocs (DT_JMPREL) should be
4406 included in the overall relocs (DT_REL). This is
4407 what Solaris does. However, UnixWare can not handle
4408 that case. Therefore, we override the DT_RELSZ entry
4409 here to make it not include the JMPREL relocs. */
4410 s
= htab
->elf
.srelplt
;
4413 dyn
.d_un
.d_val
-= s
->size
;
4417 /* We may not be using the standard ELF linker script.
4418 If .rel.plt is the first .rel section, we adjust
4419 DT_REL to not include it. */
4420 s
= htab
->elf
.srelplt
;
4423 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4425 dyn
.d_un
.d_ptr
+= s
->size
;
4429 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4432 /* Fill in the first entry in the procedure linkage table. */
4433 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4437 memcpy (htab
->elf
.splt
->contents
, elf_i386_pic_plt0_entry
,
4438 sizeof (elf_i386_pic_plt0_entry
));
4439 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
4440 htab
->plt0_pad_byte
,
4441 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
4445 memcpy (htab
->elf
.splt
->contents
, elf_i386_plt0_entry
,
4446 sizeof(elf_i386_plt0_entry
));
4447 memset (htab
->elf
.splt
->contents
+ sizeof (elf_i386_plt0_entry
),
4448 htab
->plt0_pad_byte
,
4449 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
4450 bfd_put_32 (output_bfd
,
4451 (htab
->elf
.sgotplt
->output_section
->vma
4452 + htab
->elf
.sgotplt
->output_offset
4454 htab
->elf
.splt
->contents
+ 2);
4455 bfd_put_32 (output_bfd
,
4456 (htab
->elf
.sgotplt
->output_section
->vma
4457 + htab
->elf
.sgotplt
->output_offset
4459 htab
->elf
.splt
->contents
+ 8);
4461 if (htab
->is_vxworks
)
4463 Elf_Internal_Rela rel
;
4465 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4466 On IA32 we use REL relocations so the addend goes in
4467 the PLT directly. */
4468 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4469 + htab
->elf
.splt
->output_offset
4471 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4472 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4473 htab
->srelplt2
->contents
);
4474 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4475 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4476 + htab
->elf
.splt
->output_offset
4478 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4479 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4480 htab
->srelplt2
->contents
+
4481 sizeof (Elf32_External_Rel
));
4485 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4486 really seem like the right value. */
4487 elf_section_data (htab
->elf
.splt
->output_section
)
4488 ->this_hdr
.sh_entsize
= 4;
4490 /* Correct the .rel.plt.unloaded relocations. */
4491 if (htab
->is_vxworks
&& !info
->shared
)
4493 int num_plts
= (htab
->elf
.splt
->size
/ PLT_ENTRY_SIZE
) - 1;
4496 p
= htab
->srelplt2
->contents
;
4498 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4500 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4502 for (; num_plts
; num_plts
--)
4504 Elf_Internal_Rela rel
;
4505 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4506 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4507 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4508 p
+= sizeof (Elf32_External_Rel
);
4510 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4511 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4512 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4513 p
+= sizeof (Elf32_External_Rel
);
4519 if (htab
->elf
.sgotplt
)
4521 /* Fill in the first three entries in the global offset table. */
4522 if (htab
->elf
.sgotplt
->size
> 0)
4524 bfd_put_32 (output_bfd
,
4526 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4527 htab
->elf
.sgotplt
->contents
);
4528 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4529 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4532 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4535 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4536 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4538 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4539 htab_traverse (htab
->loc_hash_table
,
4540 elf_i386_finish_local_dynamic_symbol
,
4546 /* Return address for Ith PLT stub in section PLT, for relocation REL
4547 or (bfd_vma) -1 if it should not be included. */
4550 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4551 const arelent
*rel ATTRIBUTE_UNUSED
)
4553 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
4556 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4559 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4561 if (h
->plt
.offset
!= (bfd_vma
) -1
4563 && !h
->pointer_equality_needed
)
4566 return _bfd_elf_hash_symbol (h
);
4569 /* Hook called by the linker routine which adds symbols from an object
4573 elf_i386_add_symbol_hook (bfd
* abfd ATTRIBUTE_UNUSED
,
4574 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
4575 Elf_Internal_Sym
* sym
,
4576 const char ** namep ATTRIBUTE_UNUSED
,
4577 flagword
* flagsp ATTRIBUTE_UNUSED
,
4578 asection
** secp ATTRIBUTE_UNUSED
,
4579 bfd_vma
* valp ATTRIBUTE_UNUSED
)
4581 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
4582 elf_tdata (info
->output_bfd
)->has_ifunc_symbols
= TRUE
;
4587 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4588 #define TARGET_LITTLE_NAME "elf32-i386"
4589 #define ELF_ARCH bfd_arch_i386
4590 #define ELF_MACHINE_CODE EM_386
4591 #define ELF_MAXPAGESIZE 0x1000
4593 #define elf_backend_can_gc_sections 1
4594 #define elf_backend_can_refcount 1
4595 #define elf_backend_want_got_plt 1
4596 #define elf_backend_plt_readonly 1
4597 #define elf_backend_want_plt_sym 0
4598 #define elf_backend_got_header_size 12
4600 /* Support RELA for objdump of prelink objects. */
4601 #define elf_info_to_howto elf_i386_info_to_howto_rel
4602 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4604 #define bfd_elf32_mkobject elf_i386_mkobject
4606 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4607 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4608 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4609 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4610 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4612 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4613 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4614 #define elf_backend_check_relocs elf_i386_check_relocs
4615 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4616 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4617 #define elf_backend_fake_sections elf_i386_fake_sections
4618 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4619 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4620 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4621 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4622 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4623 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4624 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4625 #define elf_backend_relocate_section elf_i386_relocate_section
4626 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4627 #define elf_backend_always_size_sections elf_i386_always_size_sections
4628 #define elf_backend_omit_section_dynsym \
4629 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4630 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4631 #define elf_backend_hash_symbol elf_i386_hash_symbol
4632 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4633 #undef elf_backend_post_process_headers
4634 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4636 #include "elf32-target.h"
4638 /* FreeBSD support. */
4640 #undef TARGET_LITTLE_SYM
4641 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4642 #undef TARGET_LITTLE_NAME
4643 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4645 #define ELF_OSABI ELFOSABI_FREEBSD
4647 /* The kernel recognizes executables as valid only if they carry a
4648 "FreeBSD" label in the ELF header. So we put this label on all
4649 executables and (for simplicity) also all other object files. */
4652 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
4654 _bfd_elf_set_osabi (abfd
, info
);
4656 #ifdef OLD_FREEBSD_ABI_LABEL
4657 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4658 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
4662 #undef elf_backend_post_process_headers
4663 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4665 #define elf32_bed elf32_i386_fbsd_bed
4667 #undef elf_backend_add_symbol_hook
4669 #include "elf32-target.h"
4671 /* VxWorks support. */
4673 #undef TARGET_LITTLE_SYM
4674 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4675 #undef TARGET_LITTLE_NAME
4676 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4679 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4681 static struct bfd_link_hash_table
*
4682 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
4684 struct bfd_link_hash_table
*ret
;
4685 struct elf_i386_link_hash_table
*htab
;
4687 ret
= elf_i386_link_hash_table_create (abfd
);
4690 htab
= (struct elf_i386_link_hash_table
*) ret
;
4691 htab
->is_vxworks
= 1;
4692 htab
->plt0_pad_byte
= 0x90;
4699 #undef elf_backend_relocs_compatible
4700 #undef elf_backend_post_process_headers
4701 #undef bfd_elf32_bfd_link_hash_table_create
4702 #define bfd_elf32_bfd_link_hash_table_create \
4703 elf_i386_vxworks_link_hash_table_create
4704 #undef elf_backend_add_symbol_hook
4705 #define elf_backend_add_symbol_hook \
4706 elf_vxworks_add_symbol_hook
4707 #undef elf_backend_link_output_symbol_hook
4708 #define elf_backend_link_output_symbol_hook \
4709 elf_vxworks_link_output_symbol_hook
4710 #undef elf_backend_emit_relocs
4711 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4712 #undef elf_backend_final_write_processing
4713 #define elf_backend_final_write_processing \
4714 elf_vxworks_final_write_processing
4716 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4718 #undef elf_backend_want_plt_sym
4719 #define elf_backend_want_plt_sym 1
4722 #define elf32_bed elf32_i386_vxworks_bed
4724 #include "elf32-target.h"