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 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"
29 /* 386 uses REL relocations instead of RELA. */
34 static reloc_howto_type elf_howto_table
[]=
36 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
37 bfd_elf_generic_reloc
, "R_386_NONE",
38 TRUE
, 0x00000000, 0x00000000, FALSE
),
39 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
40 bfd_elf_generic_reloc
, "R_386_32",
41 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
42 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
43 bfd_elf_generic_reloc
, "R_386_PC32",
44 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
45 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
46 bfd_elf_generic_reloc
, "R_386_GOT32",
47 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
48 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
49 bfd_elf_generic_reloc
, "R_386_PLT32",
50 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
51 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_386_COPY",
53 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
54 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
55 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
56 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
57 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
58 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
59 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
60 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_386_RELATIVE",
62 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
63 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_386_GOTOFF",
65 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
66 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_386_GOTPC",
68 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
70 /* We have a gap in the reloc numbers here.
71 R_386_standard counts the number up to this point, and
72 R_386_ext_offset is the value to subtract from a reloc type of
73 R_386_16 thru R_386_PC8 to form an index into this table. */
74 #define R_386_standard (R_386_GOTPC + 1)
75 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
77 /* These relocs are a GNU extension. */
78 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
80 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
81 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_386_TLS_IE",
83 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
84 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
86 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
87 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_386_TLS_LE",
89 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
90 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_386_TLS_GD",
92 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
93 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
95 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
96 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_386_16",
98 TRUE
, 0xffff, 0xffff, FALSE
),
99 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_386_PC16",
101 TRUE
, 0xffff, 0xffff, TRUE
),
102 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_386_8",
104 TRUE
, 0xff, 0xff, FALSE
),
105 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
106 bfd_elf_generic_reloc
, "R_386_PC8",
107 TRUE
, 0xff, 0xff, TRUE
),
109 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
110 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
111 /* These are common with Solaris TLS implementation. */
112 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
113 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
114 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
115 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
117 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
118 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
119 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
120 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
121 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
123 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
124 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
125 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
126 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
127 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
129 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
131 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
133 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
134 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
135 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
137 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
139 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
142 #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
143 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
145 /* GNU extension to record C++ vtable hierarchy. */
146 HOWTO (R_386_GNU_VTINHERIT
, /* type */
148 2, /* size (0 = byte, 1 = short, 2 = long) */
150 FALSE
, /* pc_relative */
152 complain_overflow_dont
, /* complain_on_overflow */
153 NULL
, /* special_function */
154 "R_386_GNU_VTINHERIT", /* name */
155 FALSE
, /* partial_inplace */
158 FALSE
), /* pcrel_offset */
160 /* GNU extension to record C++ vtable member usage. */
161 HOWTO (R_386_GNU_VTENTRY
, /* type */
163 2, /* size (0 = byte, 1 = short, 2 = long) */
165 FALSE
, /* pc_relative */
167 complain_overflow_dont
, /* complain_on_overflow */
168 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
169 "R_386_GNU_VTENTRY", /* name */
170 FALSE
, /* partial_inplace */
173 FALSE
) /* pcrel_offset */
175 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
179 #ifdef DEBUG_GEN_RELOC
181 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
186 static reloc_howto_type
*
187 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
188 bfd_reloc_code_real_type code
)
193 TRACE ("BFD_RELOC_NONE");
194 return &elf_howto_table
[R_386_NONE
];
197 TRACE ("BFD_RELOC_32");
198 return &elf_howto_table
[R_386_32
];
201 TRACE ("BFD_RELOC_CTOR");
202 return &elf_howto_table
[R_386_32
];
204 case BFD_RELOC_32_PCREL
:
205 TRACE ("BFD_RELOC_PC32");
206 return &elf_howto_table
[R_386_PC32
];
208 case BFD_RELOC_386_GOT32
:
209 TRACE ("BFD_RELOC_386_GOT32");
210 return &elf_howto_table
[R_386_GOT32
];
212 case BFD_RELOC_386_PLT32
:
213 TRACE ("BFD_RELOC_386_PLT32");
214 return &elf_howto_table
[R_386_PLT32
];
216 case BFD_RELOC_386_COPY
:
217 TRACE ("BFD_RELOC_386_COPY");
218 return &elf_howto_table
[R_386_COPY
];
220 case BFD_RELOC_386_GLOB_DAT
:
221 TRACE ("BFD_RELOC_386_GLOB_DAT");
222 return &elf_howto_table
[R_386_GLOB_DAT
];
224 case BFD_RELOC_386_JUMP_SLOT
:
225 TRACE ("BFD_RELOC_386_JUMP_SLOT");
226 return &elf_howto_table
[R_386_JUMP_SLOT
];
228 case BFD_RELOC_386_RELATIVE
:
229 TRACE ("BFD_RELOC_386_RELATIVE");
230 return &elf_howto_table
[R_386_RELATIVE
];
232 case BFD_RELOC_386_GOTOFF
:
233 TRACE ("BFD_RELOC_386_GOTOFF");
234 return &elf_howto_table
[R_386_GOTOFF
];
236 case BFD_RELOC_386_GOTPC
:
237 TRACE ("BFD_RELOC_386_GOTPC");
238 return &elf_howto_table
[R_386_GOTPC
];
240 /* These relocs are a GNU extension. */
241 case BFD_RELOC_386_TLS_TPOFF
:
242 TRACE ("BFD_RELOC_386_TLS_TPOFF");
243 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
245 case BFD_RELOC_386_TLS_IE
:
246 TRACE ("BFD_RELOC_386_TLS_IE");
247 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
249 case BFD_RELOC_386_TLS_GOTIE
:
250 TRACE ("BFD_RELOC_386_TLS_GOTIE");
251 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
253 case BFD_RELOC_386_TLS_LE
:
254 TRACE ("BFD_RELOC_386_TLS_LE");
255 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
257 case BFD_RELOC_386_TLS_GD
:
258 TRACE ("BFD_RELOC_386_TLS_GD");
259 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
261 case BFD_RELOC_386_TLS_LDM
:
262 TRACE ("BFD_RELOC_386_TLS_LDM");
263 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
266 TRACE ("BFD_RELOC_16");
267 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
269 case BFD_RELOC_16_PCREL
:
270 TRACE ("BFD_RELOC_16_PCREL");
271 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
274 TRACE ("BFD_RELOC_8");
275 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
277 case BFD_RELOC_8_PCREL
:
278 TRACE ("BFD_RELOC_8_PCREL");
279 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
281 /* Common with Sun TLS implementation. */
282 case BFD_RELOC_386_TLS_LDO_32
:
283 TRACE ("BFD_RELOC_386_TLS_LDO_32");
284 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
286 case BFD_RELOC_386_TLS_IE_32
:
287 TRACE ("BFD_RELOC_386_TLS_IE_32");
288 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
290 case BFD_RELOC_386_TLS_LE_32
:
291 TRACE ("BFD_RELOC_386_TLS_LE_32");
292 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
294 case BFD_RELOC_386_TLS_DTPMOD32
:
295 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
296 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
298 case BFD_RELOC_386_TLS_DTPOFF32
:
299 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
300 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
302 case BFD_RELOC_386_TLS_TPOFF32
:
303 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
304 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
306 case BFD_RELOC_386_TLS_GOTDESC
:
307 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
308 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
310 case BFD_RELOC_386_TLS_DESC_CALL
:
311 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
312 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
314 case BFD_RELOC_386_TLS_DESC
:
315 TRACE ("BFD_RELOC_386_TLS_DESC");
316 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
318 case BFD_RELOC_VTABLE_INHERIT
:
319 TRACE ("BFD_RELOC_VTABLE_INHERIT");
320 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
322 case BFD_RELOC_VTABLE_ENTRY
:
323 TRACE ("BFD_RELOC_VTABLE_ENTRY");
324 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
334 static reloc_howto_type
*
335 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
340 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
341 if (elf_howto_table
[i
].name
!= NULL
342 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
343 return &elf_howto_table
[i
];
349 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
351 Elf_Internal_Rela
*dst
)
353 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
356 if ((indx
= r_type
) >= R_386_standard
357 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
358 >= R_386_ext
- R_386_standard
)
359 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
360 >= R_386_tls
- R_386_ext
)
361 && ((indx
= r_type
- R_386_vt_offset
) - R_386_tls
362 >= R_386_vt
- R_386_tls
))
364 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
368 cache_ptr
->howto
= &elf_howto_table
[indx
];
371 /* Return whether a symbol name implies a local label. The UnixWare
372 2.1 cc generates temporary symbols that start with .X, so we
373 recognize them here. FIXME: do other SVR4 compilers also use .X?.
374 If so, we should move the .X recognition into
375 _bfd_elf_is_local_label_name. */
378 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
380 if (name
[0] == '.' && name
[1] == 'X')
383 return _bfd_elf_is_local_label_name (abfd
, name
);
386 /* Support for core dump NOTE sections. */
389 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
394 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
396 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
402 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
405 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
409 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
413 switch (note
->descsz
)
418 case 144: /* Linux/i386 */
420 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
423 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
433 /* Make a ".reg/999" section. */
434 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
435 size
, note
->descpos
+ offset
);
439 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
441 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
443 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
448 elf_tdata (abfd
)->core_program
449 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
450 elf_tdata (abfd
)->core_command
451 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
455 switch (note
->descsz
)
460 case 124: /* Linux/i386 elf_prpsinfo. */
461 elf_tdata (abfd
)->core_program
462 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
463 elf_tdata (abfd
)->core_command
464 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
468 /* Note that for some reason, a spurious space is tacked
469 onto the end of the args in some (at least one anyway)
470 implementations, so strip it off if it exists. */
472 char *command
= elf_tdata (abfd
)->core_command
;
473 int n
= strlen (command
);
475 if (0 < n
&& command
[n
- 1] == ' ')
476 command
[n
- 1] = '\0';
482 /* Functions for the i386 ELF linker.
484 In order to gain some understanding of code in this file without
485 knowing all the intricate details of the linker, note the
488 Functions named elf_i386_* are called by external routines, other
489 functions are only called locally. elf_i386_* functions appear
490 in this file more or less in the order in which they are called
491 from external routines. eg. elf_i386_check_relocs is called
492 early in the link process, elf_i386_finish_dynamic_sections is
493 one of the last functions. */
496 /* The name of the dynamic interpreter. This is put in the .interp
499 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
501 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
502 copying dynamic variables from a shared lib into an app's dynbss
503 section, and instead use a dynamic relocation to point into the
505 #define ELIMINATE_COPY_RELOCS 1
507 /* The size in bytes of an entry in the procedure linkage table. */
509 #define PLT_ENTRY_SIZE 16
511 /* The first entry in an absolute procedure linkage table looks like
512 this. See the SVR4 ABI i386 supplement to see how this works.
513 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
515 static const bfd_byte elf_i386_plt0_entry
[12] =
517 0xff, 0x35, /* pushl contents of address */
518 0, 0, 0, 0, /* replaced with address of .got + 4. */
519 0xff, 0x25, /* jmp indirect */
520 0, 0, 0, 0 /* replaced with address of .got + 8. */
523 /* Subsequent entries in an absolute procedure linkage table look like
526 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
528 0xff, 0x25, /* jmp indirect */
529 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
530 0x68, /* pushl immediate */
531 0, 0, 0, 0, /* replaced with offset into relocation table. */
532 0xe9, /* jmp relative */
533 0, 0, 0, 0 /* replaced with offset to start of .plt. */
536 /* The first entry in a PIC procedure linkage table look like this.
537 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
539 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
541 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
542 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
545 /* Subsequent entries in a PIC procedure linkage table look like this. */
547 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
549 0xff, 0xa3, /* jmp *offset(%ebx) */
550 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
551 0x68, /* pushl immediate */
552 0, 0, 0, 0, /* replaced with offset into relocation table. */
553 0xe9, /* jmp relative */
554 0, 0, 0, 0 /* replaced with offset to start of .plt. */
557 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
558 for the PLTResolve stub and then for each PLT entry. */
559 #define PLTRESOLVE_RELOCS_SHLIB 0
560 #define PLTRESOLVE_RELOCS 2
561 #define PLT_NON_JUMP_SLOT_RELOCS 2
563 /* The i386 linker needs to keep track of the number of relocs that it
564 decides to copy as dynamic relocs in check_relocs for each symbol.
565 This is so that it can later discard them if they are found to be
566 unnecessary. We store the information in a field extending the
567 regular ELF linker hash table. */
569 struct elf_i386_dyn_relocs
571 struct elf_i386_dyn_relocs
*next
;
573 /* The input section of the reloc. */
576 /* Total number of relocs copied for the input section. */
579 /* Number of pc-relative relocs copied for the input section. */
580 bfd_size_type pc_count
;
583 /* i386 ELF linker hash entry. */
585 struct elf_i386_link_hash_entry
587 struct elf_link_hash_entry elf
;
589 /* Track dynamic relocs copied for this symbol. */
590 struct elf_i386_dyn_relocs
*dyn_relocs
;
592 #define GOT_UNKNOWN 0
596 #define GOT_TLS_IE_POS 5
597 #define GOT_TLS_IE_NEG 6
598 #define GOT_TLS_IE_BOTH 7
599 #define GOT_TLS_GDESC 8
600 #define GOT_TLS_GD_BOTH_P(type) \
601 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
602 #define GOT_TLS_GD_P(type) \
603 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
604 #define GOT_TLS_GDESC_P(type) \
605 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
606 #define GOT_TLS_GD_ANY_P(type) \
607 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
608 unsigned char tls_type
;
610 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
611 starting at the end of the jump table. */
615 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
617 struct elf_i386_obj_tdata
619 struct elf_obj_tdata root
;
621 /* tls_type for each local got entry. */
622 char *local_got_tls_type
;
624 /* GOTPLT entries for TLS descriptors. */
625 bfd_vma
*local_tlsdesc_gotent
;
628 #define elf_i386_tdata(abfd) \
629 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
631 #define elf_i386_local_got_tls_type(abfd) \
632 (elf_i386_tdata (abfd)->local_got_tls_type)
634 #define elf_i386_local_tlsdesc_gotent(abfd) \
635 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
638 elf_i386_mkobject (bfd
*abfd
)
640 if (abfd
->tdata
.any
== NULL
)
642 bfd_size_type amt
= sizeof (struct elf_i386_obj_tdata
);
643 abfd
->tdata
.any
= bfd_zalloc (abfd
, amt
);
644 if (abfd
->tdata
.any
== NULL
)
647 return bfd_elf_mkobject (abfd
);
650 /* i386 ELF linker hash table. */
652 struct elf_i386_link_hash_table
654 struct elf_link_hash_table elf
;
656 /* Short-cuts to get to dynamic linker sections. */
665 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
668 /* True if the target system is VxWorks. */
671 /* Value used to fill the last word of the first plt entry. */
672 bfd_byte plt0_pad_byte
;
674 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
675 bfd_vma next_tls_desc_index
;
678 bfd_signed_vma refcount
;
682 /* The amount of space used by the reserved portion of the sgotplt
683 section, plus whatever space is used by the jump slots. */
684 bfd_vma sgotplt_jump_table_size
;
686 /* Small local sym to section mapping cache. */
687 struct sym_sec_cache sym_sec
;
690 /* Get the i386 ELF linker hash table from a link_info structure. */
692 #define elf_i386_hash_table(p) \
693 ((struct elf_i386_link_hash_table *) ((p)->hash))
695 #define elf_i386_compute_jump_table_size(htab) \
696 ((htab)->next_tls_desc_index * 4)
698 /* Create an entry in an i386 ELF linker hash table. */
700 static struct bfd_hash_entry
*
701 link_hash_newfunc (struct bfd_hash_entry
*entry
,
702 struct bfd_hash_table
*table
,
705 /* Allocate the structure if it has not already been allocated by a
709 entry
= bfd_hash_allocate (table
,
710 sizeof (struct elf_i386_link_hash_entry
));
715 /* Call the allocation method of the superclass. */
716 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
719 struct elf_i386_link_hash_entry
*eh
;
721 eh
= (struct elf_i386_link_hash_entry
*) entry
;
722 eh
->dyn_relocs
= NULL
;
723 eh
->tls_type
= GOT_UNKNOWN
;
724 eh
->tlsdesc_got
= (bfd_vma
) -1;
730 /* Create an i386 ELF linker hash table. */
732 static struct bfd_link_hash_table
*
733 elf_i386_link_hash_table_create (bfd
*abfd
)
735 struct elf_i386_link_hash_table
*ret
;
736 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
738 ret
= bfd_malloc (amt
);
742 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
743 sizeof (struct elf_i386_link_hash_entry
)))
756 ret
->tls_ldm_got
.refcount
= 0;
757 ret
->next_tls_desc_index
= 0;
758 ret
->sgotplt_jump_table_size
= 0;
759 ret
->sym_sec
.abfd
= NULL
;
761 ret
->srelplt2
= NULL
;
762 ret
->plt0_pad_byte
= 0;
764 return &ret
->elf
.root
;
767 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
768 shortcuts to them in our hash table. */
771 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
773 struct elf_i386_link_hash_table
*htab
;
775 if (! _bfd_elf_create_got_section (dynobj
, info
))
778 htab
= elf_i386_hash_table (info
);
779 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
780 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
781 if (!htab
->sgot
|| !htab
->sgotplt
)
784 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
785 (SEC_ALLOC
| SEC_LOAD
790 if (htab
->srelgot
== NULL
791 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
796 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
797 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
801 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
803 struct elf_i386_link_hash_table
*htab
;
805 htab
= elf_i386_hash_table (info
);
806 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
809 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
812 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
813 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
814 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
816 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
818 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
819 || (!info
->shared
&& !htab
->srelbss
))
823 && !elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
829 /* Copy the extra info we tack onto an elf_link_hash_entry. */
832 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
833 struct elf_link_hash_entry
*dir
,
834 struct elf_link_hash_entry
*ind
)
836 struct elf_i386_link_hash_entry
*edir
, *eind
;
838 edir
= (struct elf_i386_link_hash_entry
*) dir
;
839 eind
= (struct elf_i386_link_hash_entry
*) ind
;
841 if (eind
->dyn_relocs
!= NULL
)
843 if (edir
->dyn_relocs
!= NULL
)
845 struct elf_i386_dyn_relocs
**pp
;
846 struct elf_i386_dyn_relocs
*p
;
848 /* Add reloc counts against the indirect sym to the direct sym
849 list. Merge any entries against the same section. */
850 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
852 struct elf_i386_dyn_relocs
*q
;
854 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
855 if (q
->sec
== p
->sec
)
857 q
->pc_count
+= p
->pc_count
;
858 q
->count
+= p
->count
;
865 *pp
= edir
->dyn_relocs
;
868 edir
->dyn_relocs
= eind
->dyn_relocs
;
869 eind
->dyn_relocs
= NULL
;
872 if (ind
->root
.type
== bfd_link_hash_indirect
873 && dir
->got
.refcount
<= 0)
875 edir
->tls_type
= eind
->tls_type
;
876 eind
->tls_type
= GOT_UNKNOWN
;
879 if (ELIMINATE_COPY_RELOCS
880 && ind
->root
.type
!= bfd_link_hash_indirect
881 && dir
->dynamic_adjusted
)
883 /* If called to transfer flags for a weakdef during processing
884 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
885 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
886 dir
->ref_dynamic
|= ind
->ref_dynamic
;
887 dir
->ref_regular
|= ind
->ref_regular
;
888 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
889 dir
->needs_plt
|= ind
->needs_plt
;
890 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
893 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
897 elf_i386_tls_transition (struct bfd_link_info
*info
, int r_type
, int is_local
)
905 case R_386_TLS_GOTDESC
:
906 case R_386_TLS_DESC_CALL
:
907 case R_386_TLS_IE_32
:
909 return R_386_TLS_LE_32
;
910 return R_386_TLS_IE_32
;
912 case R_386_TLS_GOTIE
:
914 return R_386_TLS_LE_32
;
917 return R_386_TLS_LE_32
;
923 /* Look through the relocs for a section during the first phase, and
924 calculate needed space in the global offset table, procedure linkage
925 table, and dynamic reloc sections. */
928 elf_i386_check_relocs (bfd
*abfd
,
929 struct bfd_link_info
*info
,
931 const Elf_Internal_Rela
*relocs
)
933 struct elf_i386_link_hash_table
*htab
;
934 Elf_Internal_Shdr
*symtab_hdr
;
935 struct elf_link_hash_entry
**sym_hashes
;
936 const Elf_Internal_Rela
*rel
;
937 const Elf_Internal_Rela
*rel_end
;
940 if (info
->relocatable
)
943 htab
= elf_i386_hash_table (info
);
944 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
945 sym_hashes
= elf_sym_hashes (abfd
);
949 rel_end
= relocs
+ sec
->reloc_count
;
950 for (rel
= relocs
; rel
< rel_end
; rel
++)
953 unsigned long r_symndx
;
954 struct elf_link_hash_entry
*h
;
956 r_symndx
= ELF32_R_SYM (rel
->r_info
);
957 r_type
= ELF32_R_TYPE (rel
->r_info
);
959 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
961 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
967 if (r_symndx
< symtab_hdr
->sh_info
)
971 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
972 while (h
->root
.type
== bfd_link_hash_indirect
973 || h
->root
.type
== bfd_link_hash_warning
)
974 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
977 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
982 htab
->tls_ldm_got
.refcount
+= 1;
986 /* This symbol requires a procedure linkage table entry. We
987 actually build the entry in adjust_dynamic_symbol,
988 because this might be a case of linking PIC code which is
989 never referenced by a dynamic object, in which case we
990 don't need to generate a procedure linkage table entry
993 /* If this is a local symbol, we resolve it directly without
994 creating a procedure linkage table entry. */
999 h
->plt
.refcount
+= 1;
1002 case R_386_TLS_IE_32
:
1004 case R_386_TLS_GOTIE
:
1006 info
->flags
|= DF_STATIC_TLS
;
1011 case R_386_TLS_GOTDESC
:
1012 case R_386_TLS_DESC_CALL
:
1013 /* This symbol requires a global offset table entry. */
1015 int tls_type
, old_tls_type
;
1020 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1021 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1022 case R_386_TLS_GOTDESC
:
1023 case R_386_TLS_DESC_CALL
:
1024 tls_type
= GOT_TLS_GDESC
; break;
1025 case R_386_TLS_IE_32
:
1026 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1027 tls_type
= GOT_TLS_IE_NEG
;
1029 /* If this is a GD->IE transition, we may use either of
1030 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1031 tls_type
= GOT_TLS_IE
;
1034 case R_386_TLS_GOTIE
:
1035 tls_type
= GOT_TLS_IE_POS
; break;
1040 h
->got
.refcount
+= 1;
1041 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1045 bfd_signed_vma
*local_got_refcounts
;
1047 /* This is a global offset table entry for a local symbol. */
1048 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1049 if (local_got_refcounts
== NULL
)
1053 size
= symtab_hdr
->sh_info
;
1054 size
*= (sizeof (bfd_signed_vma
)
1055 + sizeof (bfd_vma
) + sizeof(char));
1056 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1057 if (local_got_refcounts
== NULL
)
1059 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1060 elf_i386_local_tlsdesc_gotent (abfd
)
1061 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1062 elf_i386_local_got_tls_type (abfd
)
1063 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1065 local_got_refcounts
[r_symndx
] += 1;
1066 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1069 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1070 tls_type
|= old_tls_type
;
1071 /* If a TLS symbol is accessed using IE at least once,
1072 there is no point to use dynamic model for it. */
1073 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1074 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1075 || (tls_type
& GOT_TLS_IE
) == 0))
1077 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1078 tls_type
= old_tls_type
;
1079 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1080 && GOT_TLS_GD_ANY_P (tls_type
))
1081 tls_type
|= old_tls_type
;
1084 (*_bfd_error_handler
)
1085 (_("%B: `%s' accessed both as normal and "
1086 "thread local symbol"),
1088 h
? h
->root
.root
.string
: "<local>");
1093 if (old_tls_type
!= tls_type
)
1096 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1098 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1106 if (htab
->sgot
== NULL
)
1108 if (htab
->elf
.dynobj
== NULL
)
1109 htab
->elf
.dynobj
= abfd
;
1110 if (!create_got_section (htab
->elf
.dynobj
, info
))
1113 if (r_type
!= R_386_TLS_IE
)
1117 case R_386_TLS_LE_32
:
1121 info
->flags
|= DF_STATIC_TLS
;
1126 if (h
!= NULL
&& !info
->shared
)
1128 /* If this reloc is in a read-only section, we might
1129 need a copy reloc. We can't check reliably at this
1130 stage whether the section is read-only, as input
1131 sections have not yet been mapped to output sections.
1132 Tentatively set the flag for now, and correct in
1133 adjust_dynamic_symbol. */
1136 /* We may need a .plt entry if the function this reloc
1137 refers to is in a shared lib. */
1138 h
->plt
.refcount
+= 1;
1139 if (r_type
!= R_386_PC32
)
1140 h
->pointer_equality_needed
= 1;
1143 /* If we are creating a shared library, and this is a reloc
1144 against a global symbol, or a non PC relative reloc
1145 against a local symbol, then we need to copy the reloc
1146 into the shared library. However, if we are linking with
1147 -Bsymbolic, we do not need to copy a reloc against a
1148 global symbol which is defined in an object we are
1149 including in the link (i.e., DEF_REGULAR is set). At
1150 this point we have not seen all the input files, so it is
1151 possible that DEF_REGULAR is not set now but will be set
1152 later (it is never cleared). In case of a weak definition,
1153 DEF_REGULAR may be cleared later by a strong definition in
1154 a shared library. We account for that possibility below by
1155 storing information in the relocs_copied field of the hash
1156 table entry. A similar situation occurs when creating
1157 shared libraries and symbol visibility changes render the
1160 If on the other hand, we are creating an executable, we
1161 may need to keep relocations for symbols satisfied by a
1162 dynamic library if we manage to avoid copy relocs for the
1165 && (sec
->flags
& SEC_ALLOC
) != 0
1166 && (r_type
!= R_386_PC32
1168 && (! SYMBOLIC_BIND (info
, h
)
1169 || h
->root
.type
== bfd_link_hash_defweak
1170 || !h
->def_regular
))))
1171 || (ELIMINATE_COPY_RELOCS
1173 && (sec
->flags
& SEC_ALLOC
) != 0
1175 && (h
->root
.type
== bfd_link_hash_defweak
1176 || !h
->def_regular
)))
1178 struct elf_i386_dyn_relocs
*p
;
1179 struct elf_i386_dyn_relocs
**head
;
1181 /* We must copy these reloc types into the output file.
1182 Create a reloc section in dynobj and make room for
1188 unsigned int strndx
= elf_elfheader (abfd
)->e_shstrndx
;
1189 unsigned int shnam
= elf_section_data (sec
)->rel_hdr
.sh_name
;
1191 name
= bfd_elf_string_from_elf_section (abfd
, strndx
, shnam
);
1195 if (! CONST_STRNEQ (name
, ".rel")
1196 || strcmp (bfd_get_section_name (abfd
, sec
),
1199 (*_bfd_error_handler
)
1200 (_("%B: bad relocation section name `%s\'"),
1204 if (htab
->elf
.dynobj
== NULL
)
1205 htab
->elf
.dynobj
= abfd
;
1207 dynobj
= htab
->elf
.dynobj
;
1208 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1213 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
1214 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1215 if ((sec
->flags
& SEC_ALLOC
) != 0)
1216 flags
|= SEC_ALLOC
| SEC_LOAD
;
1217 sreloc
= bfd_make_section_with_flags (dynobj
,
1221 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
1224 elf_section_data (sec
)->sreloc
= sreloc
;
1227 /* If this is a global symbol, we count the number of
1228 relocations we need for this symbol. */
1231 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1236 /* Track dynamic relocs needed for local syms too.
1237 We really need local syms available to do this
1241 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1246 vpp
= &elf_section_data (s
)->local_dynrel
;
1247 head
= (struct elf_i386_dyn_relocs
**)vpp
;
1251 if (p
== NULL
|| p
->sec
!= sec
)
1253 bfd_size_type amt
= sizeof *p
;
1254 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1265 if (r_type
== R_386_PC32
)
1270 /* This relocation describes the C++ object vtable hierarchy.
1271 Reconstruct it for later use during GC. */
1272 case R_386_GNU_VTINHERIT
:
1273 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1277 /* This relocation describes which C++ vtable entries are actually
1278 used. Record for later use during GC. */
1279 case R_386_GNU_VTENTRY
:
1280 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1292 /* Return the section that should be marked against GC for a given
1296 elf_i386_gc_mark_hook (asection
*sec
,
1297 struct bfd_link_info
*info
,
1298 Elf_Internal_Rela
*rel
,
1299 struct elf_link_hash_entry
*h
,
1300 Elf_Internal_Sym
*sym
)
1303 switch (ELF32_R_TYPE (rel
->r_info
))
1305 case R_386_GNU_VTINHERIT
:
1306 case R_386_GNU_VTENTRY
:
1310 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1313 /* Update the got entry reference counts for the section being removed. */
1316 elf_i386_gc_sweep_hook (bfd
*abfd
,
1317 struct bfd_link_info
*info
,
1319 const Elf_Internal_Rela
*relocs
)
1321 Elf_Internal_Shdr
*symtab_hdr
;
1322 struct elf_link_hash_entry
**sym_hashes
;
1323 bfd_signed_vma
*local_got_refcounts
;
1324 const Elf_Internal_Rela
*rel
, *relend
;
1326 elf_section_data (sec
)->local_dynrel
= NULL
;
1328 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1329 sym_hashes
= elf_sym_hashes (abfd
);
1330 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1332 relend
= relocs
+ sec
->reloc_count
;
1333 for (rel
= relocs
; rel
< relend
; rel
++)
1335 unsigned long r_symndx
;
1336 unsigned int r_type
;
1337 struct elf_link_hash_entry
*h
= NULL
;
1339 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1340 if (r_symndx
>= symtab_hdr
->sh_info
)
1342 struct elf_i386_link_hash_entry
*eh
;
1343 struct elf_i386_dyn_relocs
**pp
;
1344 struct elf_i386_dyn_relocs
*p
;
1346 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1347 while (h
->root
.type
== bfd_link_hash_indirect
1348 || h
->root
.type
== bfd_link_hash_warning
)
1349 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1350 eh
= (struct elf_i386_link_hash_entry
*) h
;
1352 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1355 /* Everything must go for SEC. */
1361 r_type
= ELF32_R_TYPE (rel
->r_info
);
1362 r_type
= elf_i386_tls_transition (info
, r_type
, h
!= NULL
);
1366 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1367 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1371 case R_386_TLS_GOTDESC
:
1372 case R_386_TLS_DESC_CALL
:
1373 case R_386_TLS_IE_32
:
1375 case R_386_TLS_GOTIE
:
1379 if (h
->got
.refcount
> 0)
1380 h
->got
.refcount
-= 1;
1382 else if (local_got_refcounts
!= NULL
)
1384 if (local_got_refcounts
[r_symndx
] > 0)
1385 local_got_refcounts
[r_symndx
] -= 1;
1398 if (h
->plt
.refcount
> 0)
1399 h
->plt
.refcount
-= 1;
1411 /* Adjust a symbol defined by a dynamic object and referenced by a
1412 regular object. The current definition is in some section of the
1413 dynamic object, but we're not including those sections. We have to
1414 change the definition to something the rest of the link can
1418 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1419 struct elf_link_hash_entry
*h
)
1421 struct elf_i386_link_hash_table
*htab
;
1424 /* If this is a function, put it in the procedure linkage table. We
1425 will fill in the contents of the procedure linkage table later,
1426 when we know the address of the .got section. */
1427 if (h
->type
== STT_FUNC
1430 if (h
->plt
.refcount
<= 0
1431 || SYMBOL_CALLS_LOCAL (info
, h
)
1432 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1433 && h
->root
.type
== bfd_link_hash_undefweak
))
1435 /* This case can occur if we saw a PLT32 reloc in an input
1436 file, but the symbol was never referred to by a dynamic
1437 object, or if all references were garbage collected. In
1438 such a case, we don't actually need to build a procedure
1439 linkage table, and we can just do a PC32 reloc instead. */
1440 h
->plt
.offset
= (bfd_vma
) -1;
1447 /* It's possible that we incorrectly decided a .plt reloc was
1448 needed for an R_386_PC32 reloc to a non-function sym in
1449 check_relocs. We can't decide accurately between function and
1450 non-function syms in check-relocs; Objects loaded later in
1451 the link may change h->type. So fix it now. */
1452 h
->plt
.offset
= (bfd_vma
) -1;
1454 /* If this is a weak symbol, and there is a real definition, the
1455 processor independent code will have arranged for us to see the
1456 real definition first, and we can just use the same value. */
1457 if (h
->u
.weakdef
!= NULL
)
1459 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1460 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1461 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1462 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1463 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1464 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1468 /* This is a reference to a symbol defined by a dynamic object which
1469 is not a function. */
1471 /* If we are creating a shared library, we must presume that the
1472 only references to the symbol are via the global offset table.
1473 For such cases we need not do anything here; the relocations will
1474 be handled correctly by relocate_section. */
1478 /* If there are no references to this symbol that do not use the
1479 GOT, we don't need to generate a copy reloc. */
1480 if (!h
->non_got_ref
)
1483 /* If -z nocopyreloc was given, we won't generate them either. */
1484 if (info
->nocopyreloc
)
1490 htab
= elf_i386_hash_table (info
);
1492 /* If there aren't any dynamic relocs in read-only sections, then
1493 we can keep the dynamic relocs and avoid the copy reloc. This
1494 doesn't work on VxWorks, where we can not have dynamic relocations
1495 (other than copy and jump slot relocations) in an executable. */
1496 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1498 struct elf_i386_link_hash_entry
* eh
;
1499 struct elf_i386_dyn_relocs
*p
;
1501 eh
= (struct elf_i386_link_hash_entry
*) h
;
1502 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1504 s
= p
->sec
->output_section
;
1505 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1518 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1519 h
->root
.root
.string
);
1523 /* We must allocate the symbol in our .dynbss section, which will
1524 become part of the .bss section of the executable. There will be
1525 an entry for this symbol in the .dynsym section. The dynamic
1526 object will contain position independent code, so all references
1527 from the dynamic object to this symbol will go through the global
1528 offset table. The dynamic linker will use the .dynsym entry to
1529 determine the address it must put in the global offset table, so
1530 both the dynamic object and the regular object will refer to the
1531 same memory location for the variable. */
1533 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1534 copy the initial value out of the dynamic object and into the
1535 runtime process image. */
1536 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1538 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1544 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1547 /* Allocate space in .plt, .got and associated reloc sections for
1551 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1553 struct bfd_link_info
*info
;
1554 struct elf_i386_link_hash_table
*htab
;
1555 struct elf_i386_link_hash_entry
*eh
;
1556 struct elf_i386_dyn_relocs
*p
;
1558 if (h
->root
.type
== bfd_link_hash_indirect
)
1561 if (h
->root
.type
== bfd_link_hash_warning
)
1562 /* When warning symbols are created, they **replace** the "real"
1563 entry in the hash table, thus we never get to see the real
1564 symbol in a hash traversal. So look at it now. */
1565 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1567 info
= (struct bfd_link_info
*) inf
;
1568 htab
= elf_i386_hash_table (info
);
1570 if (htab
->elf
.dynamic_sections_created
1571 && h
->plt
.refcount
> 0)
1573 /* Make sure this symbol is output as a dynamic symbol.
1574 Undefined weak syms won't yet be marked as dynamic. */
1575 if (h
->dynindx
== -1
1576 && !h
->forced_local
)
1578 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1583 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1585 asection
*s
= htab
->splt
;
1587 /* If this is the first .plt entry, make room for the special
1590 s
->size
+= PLT_ENTRY_SIZE
;
1592 h
->plt
.offset
= s
->size
;
1594 /* If this symbol is not defined in a regular file, and we are
1595 not generating a shared library, then set the symbol to this
1596 location in the .plt. This is required to make function
1597 pointers compare as equal between the normal executable and
1598 the shared library. */
1602 h
->root
.u
.def
.section
= s
;
1603 h
->root
.u
.def
.value
= h
->plt
.offset
;
1606 /* Make room for this entry. */
1607 s
->size
+= PLT_ENTRY_SIZE
;
1609 /* We also need to make an entry in the .got.plt section, which
1610 will be placed in the .got section by the linker script. */
1611 htab
->sgotplt
->size
+= 4;
1613 /* We also need to make an entry in the .rel.plt section. */
1614 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1615 htab
->next_tls_desc_index
++;
1617 if (htab
->is_vxworks
&& !info
->shared
)
1619 /* VxWorks has a second set of relocations for each PLT entry
1620 in executables. They go in a separate relocation section,
1621 which is processed by the kernel loader. */
1623 /* There are two relocations for the initial PLT entry: an
1624 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1625 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1627 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1628 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1630 /* There are two extra relocations for each subsequent PLT entry:
1631 an R_386_32 relocation for the GOT entry, and an R_386_32
1632 relocation for the PLT entry. */
1634 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1639 h
->plt
.offset
= (bfd_vma
) -1;
1645 h
->plt
.offset
= (bfd_vma
) -1;
1649 eh
= (struct elf_i386_link_hash_entry
*) h
;
1650 eh
->tlsdesc_got
= (bfd_vma
) -1;
1652 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1653 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1654 if (h
->got
.refcount
> 0
1657 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1658 h
->got
.offset
= (bfd_vma
) -1;
1659 else if (h
->got
.refcount
> 0)
1663 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1665 /* Make sure this symbol is output as a dynamic symbol.
1666 Undefined weak syms won't yet be marked as dynamic. */
1667 if (h
->dynindx
== -1
1668 && !h
->forced_local
)
1670 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1675 if (GOT_TLS_GDESC_P (tls_type
))
1677 eh
->tlsdesc_got
= htab
->sgotplt
->size
1678 - elf_i386_compute_jump_table_size (htab
);
1679 htab
->sgotplt
->size
+= 8;
1680 h
->got
.offset
= (bfd_vma
) -2;
1682 if (! GOT_TLS_GDESC_P (tls_type
)
1683 || GOT_TLS_GD_P (tls_type
))
1685 h
->got
.offset
= s
->size
;
1687 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1688 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
1691 dyn
= htab
->elf
.dynamic_sections_created
;
1692 /* R_386_TLS_IE_32 needs one dynamic relocation,
1693 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1694 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1695 need two), R_386_TLS_GD needs one if local symbol and two if
1697 if (tls_type
== GOT_TLS_IE_BOTH
)
1698 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1699 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
1700 || (tls_type
& GOT_TLS_IE
))
1701 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1702 else if (GOT_TLS_GD_P (tls_type
))
1703 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1704 else if (! GOT_TLS_GDESC_P (tls_type
)
1705 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1706 || h
->root
.type
!= bfd_link_hash_undefweak
)
1708 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1709 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1710 if (GOT_TLS_GDESC_P (tls_type
))
1711 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1714 h
->got
.offset
= (bfd_vma
) -1;
1716 if (eh
->dyn_relocs
== NULL
)
1719 /* In the shared -Bsymbolic case, discard space allocated for
1720 dynamic pc-relative relocs against symbols which turn out to be
1721 defined in regular objects. For the normal shared case, discard
1722 space for pc-relative relocs that have become local due to symbol
1723 visibility changes. */
1727 /* The only reloc that uses pc_count is R_386_PC32, which will
1728 appear on a call or on something like ".long foo - .". We
1729 want calls to protected symbols to resolve directly to the
1730 function rather than going via the plt. If people want
1731 function pointer comparisons to work as expected then they
1732 should avoid writing assembly like ".long foo - .". */
1733 if (SYMBOL_CALLS_LOCAL (info
, h
))
1735 struct elf_i386_dyn_relocs
**pp
;
1737 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1739 p
->count
-= p
->pc_count
;
1748 /* Also discard relocs on undefined weak syms with non-default
1750 if (eh
->dyn_relocs
!= NULL
1751 && h
->root
.type
== bfd_link_hash_undefweak
)
1753 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1754 eh
->dyn_relocs
= NULL
;
1756 /* Make sure undefined weak symbols are output as a dynamic
1758 else if (h
->dynindx
== -1
1759 && !h
->forced_local
)
1761 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1766 else if (ELIMINATE_COPY_RELOCS
)
1768 /* For the non-shared case, discard space for relocs against
1769 symbols which turn out to need copy relocs or are not
1775 || (htab
->elf
.dynamic_sections_created
1776 && (h
->root
.type
== bfd_link_hash_undefweak
1777 || h
->root
.type
== bfd_link_hash_undefined
))))
1779 /* Make sure this symbol is output as a dynamic symbol.
1780 Undefined weak syms won't yet be marked as dynamic. */
1781 if (h
->dynindx
== -1
1782 && !h
->forced_local
)
1784 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1788 /* If that succeeded, we know we'll be keeping all the
1790 if (h
->dynindx
!= -1)
1794 eh
->dyn_relocs
= NULL
;
1799 /* Finally, allocate space. */
1800 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1802 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1803 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1809 /* Find any dynamic relocs that apply to read-only sections. */
1812 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1814 struct elf_i386_link_hash_entry
*eh
;
1815 struct elf_i386_dyn_relocs
*p
;
1817 if (h
->root
.type
== bfd_link_hash_warning
)
1818 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1820 eh
= (struct elf_i386_link_hash_entry
*) h
;
1821 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1823 asection
*s
= p
->sec
->output_section
;
1825 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1827 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1829 info
->flags
|= DF_TEXTREL
;
1831 /* Not an error, just cut short the traversal. */
1838 /* Set the sizes of the dynamic sections. */
1841 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1842 struct bfd_link_info
*info
)
1844 struct elf_i386_link_hash_table
*htab
;
1850 htab
= elf_i386_hash_table (info
);
1851 dynobj
= htab
->elf
.dynobj
;
1855 if (htab
->elf
.dynamic_sections_created
)
1857 /* Set the contents of the .interp section to the interpreter. */
1858 if (info
->executable
)
1860 s
= bfd_get_section_by_name (dynobj
, ".interp");
1863 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1864 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1868 /* Set up .got offsets for local syms, and space for local dynamic
1870 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1872 bfd_signed_vma
*local_got
;
1873 bfd_signed_vma
*end_local_got
;
1874 char *local_tls_type
;
1875 bfd_vma
*local_tlsdesc_gotent
;
1876 bfd_size_type locsymcount
;
1877 Elf_Internal_Shdr
*symtab_hdr
;
1880 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1883 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1885 struct elf_i386_dyn_relocs
*p
;
1887 for (p
= ((struct elf_i386_dyn_relocs
*)
1888 elf_section_data (s
)->local_dynrel
);
1892 if (!bfd_is_abs_section (p
->sec
)
1893 && bfd_is_abs_section (p
->sec
->output_section
))
1895 /* Input section has been discarded, either because
1896 it is a copy of a linkonce section or due to
1897 linker script /DISCARD/, so we'll be discarding
1900 else if (p
->count
!= 0)
1902 srel
= elf_section_data (p
->sec
)->sreloc
;
1903 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1904 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1905 info
->flags
|= DF_TEXTREL
;
1910 local_got
= elf_local_got_refcounts (ibfd
);
1914 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1915 locsymcount
= symtab_hdr
->sh_info
;
1916 end_local_got
= local_got
+ locsymcount
;
1917 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
1918 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
1920 srel
= htab
->srelgot
;
1921 for (; local_got
< end_local_got
;
1922 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
1924 *local_tlsdesc_gotent
= (bfd_vma
) -1;
1927 if (GOT_TLS_GDESC_P (*local_tls_type
))
1929 *local_tlsdesc_gotent
= htab
->sgotplt
->size
1930 - elf_i386_compute_jump_table_size (htab
);
1931 htab
->sgotplt
->size
+= 8;
1932 *local_got
= (bfd_vma
) -2;
1934 if (! GOT_TLS_GDESC_P (*local_tls_type
)
1935 || GOT_TLS_GD_P (*local_tls_type
))
1937 *local_got
= s
->size
;
1939 if (GOT_TLS_GD_P (*local_tls_type
)
1940 || *local_tls_type
== GOT_TLS_IE_BOTH
)
1944 || GOT_TLS_GD_ANY_P (*local_tls_type
)
1945 || (*local_tls_type
& GOT_TLS_IE
))
1947 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
1948 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
1949 else if (GOT_TLS_GD_P (*local_tls_type
)
1950 || ! GOT_TLS_GDESC_P (*local_tls_type
))
1951 srel
->size
+= sizeof (Elf32_External_Rel
);
1952 if (GOT_TLS_GDESC_P (*local_tls_type
))
1953 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1957 *local_got
= (bfd_vma
) -1;
1961 if (htab
->tls_ldm_got
.refcount
> 0)
1963 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
1965 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
1966 htab
->sgot
->size
+= 8;
1967 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1970 htab
->tls_ldm_got
.offset
= -1;
1972 /* Allocate global sym .plt and .got entries, and space for global
1973 sym dynamic relocs. */
1974 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
1976 /* For every jump slot reserved in the sgotplt, reloc_count is
1977 incremented. However, when we reserve space for TLS descriptors,
1978 it's not incremented, so in order to compute the space reserved
1979 for them, it suffices to multiply the reloc count by the jump
1982 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
1984 /* We now have determined the sizes of the various dynamic sections.
1985 Allocate memory for them. */
1987 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1989 bfd_boolean strip_section
= TRUE
;
1991 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1996 || s
== htab
->sgotplt
1997 || s
== htab
->sdynbss
)
1999 /* Strip this section if we don't need it; see the
2001 /* We'd like to strip these sections if they aren't needed, but if
2002 we've exported dynamic symbols from them we must leave them.
2003 It's too late to tell BFD to get rid of the symbols. */
2005 if (htab
->elf
.hplt
!= NULL
)
2006 strip_section
= FALSE
;
2008 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2010 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
2013 /* We use the reloc_count field as a counter if we need
2014 to copy relocs into the output file. */
2019 /* It's not one of our sections, so don't allocate space. */
2025 /* If we don't need this section, strip it from the
2026 output file. This is mostly to handle .rel.bss and
2027 .rel.plt. We must create both sections in
2028 create_dynamic_sections, because they must be created
2029 before the linker maps input sections to output
2030 sections. The linker does that before
2031 adjust_dynamic_symbol is called, and it is that
2032 function which decides whether anything needs to go
2033 into these sections. */
2035 s
->flags
|= SEC_EXCLUDE
;
2039 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2042 /* Allocate memory for the section contents. We use bfd_zalloc
2043 here in case unused entries are not reclaimed before the
2044 section's contents are written out. This should not happen,
2045 but this way if it does, we get a R_386_NONE reloc instead
2047 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2048 if (s
->contents
== NULL
)
2052 if (htab
->elf
.dynamic_sections_created
)
2054 /* Add some entries to the .dynamic section. We fill in the
2055 values later, in elf_i386_finish_dynamic_sections, but we
2056 must add the entries now so that we get the correct size for
2057 the .dynamic section. The DT_DEBUG entry is filled in by the
2058 dynamic linker and used by the debugger. */
2059 #define add_dynamic_entry(TAG, VAL) \
2060 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2062 if (info
->executable
)
2064 if (!add_dynamic_entry (DT_DEBUG
, 0))
2068 if (htab
->splt
->size
!= 0)
2070 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2071 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2072 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2073 || !add_dynamic_entry (DT_JMPREL
, 0))
2079 if (!add_dynamic_entry (DT_REL
, 0)
2080 || !add_dynamic_entry (DT_RELSZ
, 0)
2081 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2084 /* If any dynamic relocs apply to a read-only section,
2085 then we need a DT_TEXTREL entry. */
2086 if ((info
->flags
& DF_TEXTREL
) == 0)
2087 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2090 if ((info
->flags
& DF_TEXTREL
) != 0)
2092 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2097 #undef add_dynamic_entry
2103 elf_i386_always_size_sections (bfd
*output_bfd
,
2104 struct bfd_link_info
*info
)
2106 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2110 struct elf_link_hash_entry
*tlsbase
;
2112 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2113 "_TLS_MODULE_BASE_",
2114 FALSE
, FALSE
, FALSE
);
2116 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2118 struct bfd_link_hash_entry
*bh
= NULL
;
2119 const struct elf_backend_data
*bed
2120 = get_elf_backend_data (output_bfd
);
2122 if (!(_bfd_generic_link_add_one_symbol
2123 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2124 tls_sec
, 0, NULL
, FALSE
,
2125 bed
->collect
, &bh
)))
2127 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2128 tlsbase
->def_regular
= 1;
2129 tlsbase
->other
= STV_HIDDEN
;
2130 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2137 /* Set the correct type for an x86 ELF section. We do this by the
2138 section name, which is a hack, but ought to work. */
2141 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2142 Elf_Internal_Shdr
*hdr
,
2145 register const char *name
;
2147 name
= bfd_get_section_name (abfd
, sec
);
2149 /* This is an ugly, but unfortunately necessary hack that is
2150 needed when producing EFI binaries on x86. It tells
2151 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2152 containing ELF relocation info. We need this hack in order to
2153 be able to generate ELF binaries that can be translated into
2154 EFI applications (which are essentially COFF objects). Those
2155 files contain a COFF ".reloc" section inside an ELFNN object,
2156 which would normally cause BFD to segfault because it would
2157 attempt to interpret this section as containing relocation
2158 entries for section "oc". With this hack enabled, ".reloc"
2159 will be treated as a normal data section, which will avoid the
2160 segfault. However, you won't be able to create an ELFNN binary
2161 with a section named "oc" that needs relocations, but that's
2162 the kind of ugly side-effects you get when detecting section
2163 types based on their names... In practice, this limitation is
2164 unlikely to bite. */
2165 if (strcmp (name
, ".reloc") == 0)
2166 hdr
->sh_type
= SHT_PROGBITS
;
2171 /* Return the base VMA address which should be subtracted from real addresses
2172 when resolving @dtpoff relocation.
2173 This is PT_TLS segment p_vaddr. */
2176 dtpoff_base (struct bfd_link_info
*info
)
2178 /* If tls_sec is NULL, we should have signalled an error already. */
2179 if (elf_hash_table (info
)->tls_sec
== NULL
)
2181 return elf_hash_table (info
)->tls_sec
->vma
;
2184 /* Return the relocation value for @tpoff relocation
2185 if STT_TLS virtual address is ADDRESS. */
2188 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2190 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2192 /* If tls_sec is NULL, we should have signalled an error already. */
2193 if (htab
->tls_sec
== NULL
)
2195 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2198 /* Relocate an i386 ELF section. */
2201 elf_i386_relocate_section (bfd
*output_bfd
,
2202 struct bfd_link_info
*info
,
2204 asection
*input_section
,
2206 Elf_Internal_Rela
*relocs
,
2207 Elf_Internal_Sym
*local_syms
,
2208 asection
**local_sections
)
2210 struct elf_i386_link_hash_table
*htab
;
2211 Elf_Internal_Shdr
*symtab_hdr
;
2212 struct elf_link_hash_entry
**sym_hashes
;
2213 bfd_vma
*local_got_offsets
;
2214 bfd_vma
*local_tlsdesc_gotents
;
2215 Elf_Internal_Rela
*rel
;
2216 Elf_Internal_Rela
*relend
;
2218 htab
= elf_i386_hash_table (info
);
2219 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2220 sym_hashes
= elf_sym_hashes (input_bfd
);
2221 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2222 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2225 relend
= relocs
+ input_section
->reloc_count
;
2226 for (; rel
< relend
; rel
++)
2228 unsigned int r_type
;
2229 reloc_howto_type
*howto
;
2230 unsigned long r_symndx
;
2231 struct elf_link_hash_entry
*h
;
2232 Elf_Internal_Sym
*sym
;
2234 bfd_vma off
, offplt
;
2236 bfd_boolean unresolved_reloc
;
2237 bfd_reloc_status_type r
;
2241 r_type
= ELF32_R_TYPE (rel
->r_info
);
2242 if (r_type
== R_386_GNU_VTINHERIT
2243 || r_type
== R_386_GNU_VTENTRY
)
2246 if ((indx
= r_type
) >= R_386_standard
2247 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2248 >= R_386_ext
- R_386_standard
)
2249 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2250 >= R_386_tls
- R_386_ext
))
2252 (*_bfd_error_handler
)
2253 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2254 input_bfd
, input_section
, r_type
);
2255 bfd_set_error (bfd_error_bad_value
);
2258 howto
= elf_howto_table
+ indx
;
2260 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2264 unresolved_reloc
= FALSE
;
2265 if (r_symndx
< symtab_hdr
->sh_info
)
2267 sym
= local_syms
+ r_symndx
;
2268 sec
= local_sections
[r_symndx
];
2269 relocation
= (sec
->output_section
->vma
2270 + sec
->output_offset
2273 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
2274 && ((sec
->flags
& SEC_MERGE
) != 0
2275 || (info
->relocatable
2276 && sec
->output_offset
!= 0)))
2279 bfd_byte
*where
= contents
+ rel
->r_offset
;
2281 switch (howto
->size
)
2284 addend
= bfd_get_8 (input_bfd
, where
);
2285 if (howto
->pc_relative
)
2287 addend
= (addend
^ 0x80) - 0x80;
2292 addend
= bfd_get_16 (input_bfd
, where
);
2293 if (howto
->pc_relative
)
2295 addend
= (addend
^ 0x8000) - 0x8000;
2300 addend
= bfd_get_32 (input_bfd
, where
);
2301 if (howto
->pc_relative
)
2303 addend
= (addend
^ 0x80000000) - 0x80000000;
2311 if (info
->relocatable
)
2312 addend
+= sec
->output_offset
;
2315 asection
*msec
= sec
;
2316 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
2318 addend
-= relocation
;
2319 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2322 switch (howto
->size
)
2325 /* FIXME: overflow checks. */
2326 if (howto
->pc_relative
)
2328 bfd_put_8 (input_bfd
, addend
, where
);
2331 if (howto
->pc_relative
)
2333 bfd_put_16 (input_bfd
, addend
, where
);
2336 if (howto
->pc_relative
)
2338 bfd_put_32 (input_bfd
, addend
, where
);
2347 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2348 r_symndx
, symtab_hdr
, sym_hashes
,
2350 unresolved_reloc
, warned
);
2353 if (sec
!= NULL
&& elf_discarded_section (sec
))
2355 /* For relocs against symbols from removed linkonce sections,
2356 or sections discarded by a linker script, we just want the
2357 section contents zeroed. Avoid any special processing. */
2358 _bfd_clear_contents (howto
, input_bfd
, contents
+ rel
->r_offset
);
2364 if (info
->relocatable
)
2370 /* Relocation is to the entry for this symbol in the global
2372 if (htab
->sgot
== NULL
)
2379 off
= h
->got
.offset
;
2380 dyn
= htab
->elf
.dynamic_sections_created
;
2381 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2383 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2384 || (ELF_ST_VISIBILITY (h
->other
)
2385 && h
->root
.type
== bfd_link_hash_undefweak
))
2387 /* This is actually a static link, or it is a
2388 -Bsymbolic link and the symbol is defined
2389 locally, or the symbol was forced to be local
2390 because of a version file. We must initialize
2391 this entry in the global offset table. Since the
2392 offset must always be a multiple of 4, we use the
2393 least significant bit to record whether we have
2394 initialized it already.
2396 When doing a dynamic link, we create a .rel.got
2397 relocation entry to initialize the value. This
2398 is done in the finish_dynamic_symbol routine. */
2403 bfd_put_32 (output_bfd
, relocation
,
2404 htab
->sgot
->contents
+ off
);
2409 unresolved_reloc
= FALSE
;
2413 if (local_got_offsets
== NULL
)
2416 off
= local_got_offsets
[r_symndx
];
2418 /* The offset must always be a multiple of 4. We use
2419 the least significant bit to record whether we have
2420 already generated the necessary reloc. */
2425 bfd_put_32 (output_bfd
, relocation
,
2426 htab
->sgot
->contents
+ off
);
2431 Elf_Internal_Rela outrel
;
2438 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2439 + htab
->sgot
->output_offset
2441 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2443 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2444 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2447 local_got_offsets
[r_symndx
] |= 1;
2451 if (off
>= (bfd_vma
) -2)
2454 relocation
= htab
->sgot
->output_section
->vma
2455 + htab
->sgot
->output_offset
+ off
2456 - htab
->sgotplt
->output_section
->vma
2457 - htab
->sgotplt
->output_offset
;
2461 /* Relocation is relative to the start of the global offset
2464 /* Check to make sure it isn't a protected function symbol
2465 for shared library since it may not be local when used
2466 as function address. */
2468 && !info
->executable
2471 && h
->type
== STT_FUNC
2472 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2474 (*_bfd_error_handler
)
2475 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2476 input_bfd
, h
->root
.root
.string
);
2477 bfd_set_error (bfd_error_bad_value
);
2481 /* Note that sgot is not involved in this
2482 calculation. We always want the start of .got.plt. If we
2483 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2484 permitted by the ABI, we might have to change this
2486 relocation
-= htab
->sgotplt
->output_section
->vma
2487 + htab
->sgotplt
->output_offset
;
2491 /* Use global offset table as symbol value. */
2492 relocation
= htab
->sgotplt
->output_section
->vma
2493 + htab
->sgotplt
->output_offset
;
2494 unresolved_reloc
= FALSE
;
2498 /* Relocation is to the entry for this symbol in the
2499 procedure linkage table. */
2501 /* Resolve a PLT32 reloc against a local symbol directly,
2502 without using the procedure linkage table. */
2506 if (h
->plt
.offset
== (bfd_vma
) -1
2507 || htab
->splt
== NULL
)
2509 /* We didn't make a PLT entry for this symbol. This
2510 happens when statically linking PIC code, or when
2511 using -Bsymbolic. */
2515 relocation
= (htab
->splt
->output_section
->vma
2516 + htab
->splt
->output_offset
2518 unresolved_reloc
= FALSE
;
2523 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2528 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2529 || h
->root
.type
!= bfd_link_hash_undefweak
)
2530 && (r_type
!= R_386_PC32
2531 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2532 || (ELIMINATE_COPY_RELOCS
2539 || h
->root
.type
== bfd_link_hash_undefweak
2540 || h
->root
.type
== bfd_link_hash_undefined
)))
2542 Elf_Internal_Rela outrel
;
2544 bfd_boolean skip
, relocate
;
2547 /* When generating a shared object, these relocations
2548 are copied into the output file to be resolved at run
2555 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2557 if (outrel
.r_offset
== (bfd_vma
) -1)
2559 else if (outrel
.r_offset
== (bfd_vma
) -2)
2560 skip
= TRUE
, relocate
= TRUE
;
2561 outrel
.r_offset
+= (input_section
->output_section
->vma
2562 + input_section
->output_offset
);
2565 memset (&outrel
, 0, sizeof outrel
);
2568 && (r_type
== R_386_PC32
2570 || !SYMBOLIC_BIND (info
, h
)
2571 || !h
->def_regular
))
2572 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2575 /* This symbol is local, or marked to become local. */
2577 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2580 sreloc
= elf_section_data (input_section
)->sreloc
;
2584 loc
= sreloc
->contents
;
2585 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2586 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2588 /* If this reloc is against an external symbol, we do
2589 not want to fiddle with the addend. Otherwise, we
2590 need to include the symbol value so that it becomes
2591 an addend for the dynamic reloc. */
2600 Elf_Internal_Rela outrel
;
2604 outrel
.r_offset
= rel
->r_offset
2605 + input_section
->output_section
->vma
2606 + input_section
->output_offset
;
2607 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2608 sreloc
= elf_section_data (input_section
)->sreloc
;
2611 loc
= sreloc
->contents
;
2612 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2613 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2618 case R_386_TLS_GOTDESC
:
2619 case R_386_TLS_DESC_CALL
:
2620 case R_386_TLS_IE_32
:
2621 case R_386_TLS_GOTIE
:
2622 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
2623 tls_type
= GOT_UNKNOWN
;
2624 if (h
== NULL
&& local_got_offsets
)
2625 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
2628 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2629 if (!info
->shared
&& h
->dynindx
== -1 && (tls_type
& GOT_TLS_IE
))
2630 r_type
= R_386_TLS_LE_32
;
2632 if (tls_type
== GOT_TLS_IE
)
2633 tls_type
= GOT_TLS_IE_NEG
;
2634 if (r_type
== R_386_TLS_GD
2635 || r_type
== R_386_TLS_GOTDESC
2636 || r_type
== R_386_TLS_DESC_CALL
)
2638 if (tls_type
== GOT_TLS_IE_POS
)
2639 r_type
= R_386_TLS_GOTIE
;
2640 else if (tls_type
& GOT_TLS_IE
)
2641 r_type
= R_386_TLS_IE_32
;
2644 if (r_type
== R_386_TLS_LE_32
)
2646 BFD_ASSERT (! unresolved_reloc
);
2647 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
2649 unsigned int val
, type
;
2652 /* GD->LE transition. */
2653 BFD_ASSERT (rel
->r_offset
>= 2);
2654 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2655 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2656 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2657 BFD_ASSERT (bfd_get_8 (input_bfd
,
2658 contents
+ rel
->r_offset
+ 4)
2660 BFD_ASSERT (rel
+ 1 < relend
);
2661 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2662 roff
= rel
->r_offset
+ 5;
2663 val
= bfd_get_8 (input_bfd
,
2664 contents
+ rel
->r_offset
- 1);
2667 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2669 movl %gs:0, %eax; subl $foo@tpoff, %eax
2670 (6 byte form of subl). */
2671 BFD_ASSERT (rel
->r_offset
>= 3);
2672 BFD_ASSERT (bfd_get_8 (input_bfd
,
2673 contents
+ rel
->r_offset
- 3)
2675 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2676 memcpy (contents
+ rel
->r_offset
- 3,
2677 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2681 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2682 if (rel
->r_offset
+ 10 <= input_section
->size
2683 && bfd_get_8 (input_bfd
,
2684 contents
+ rel
->r_offset
+ 9) == 0x90)
2686 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2688 movl %gs:0, %eax; subl $foo@tpoff, %eax
2689 (6 byte form of subl). */
2690 memcpy (contents
+ rel
->r_offset
- 2,
2691 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2692 roff
= rel
->r_offset
+ 6;
2696 /* leal foo(%reg), %eax; call ___tls_get_addr
2698 movl %gs:0, %eax; subl $foo@tpoff, %eax
2699 (5 byte form of subl). */
2700 memcpy (contents
+ rel
->r_offset
- 2,
2701 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2704 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2706 /* Skip R_386_PLT32. */
2710 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
2712 /* GDesc -> LE transition.
2713 It's originally something like:
2714 leal x@tlsdesc(%ebx), %eax
2718 Registers other than %eax may be set up here. */
2720 unsigned int val
, type
;
2723 /* First, make sure it's a leal adding ebx to a
2724 32-bit offset into any register, although it's
2725 probably almost always going to be eax. */
2726 roff
= rel
->r_offset
;
2727 BFD_ASSERT (roff
>= 2);
2728 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
2729 BFD_ASSERT (type
== 0x8d);
2730 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
2731 BFD_ASSERT ((val
& 0xc7) == 0x83);
2732 BFD_ASSERT (roff
+ 4 <= input_section
->size
);
2734 /* Now modify the instruction as appropriate. */
2735 /* aoliva FIXME: remove the above and xor the byte
2737 bfd_put_8 (output_bfd
, val
^ 0x86,
2738 contents
+ roff
- 1);
2739 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2743 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
2745 /* GDesc -> LE transition.
2751 unsigned int val
, type
;
2754 /* First, make sure it's a call *(%eax). */
2755 roff
= rel
->r_offset
;
2756 BFD_ASSERT (roff
+ 2 <= input_section
->size
);
2757 type
= bfd_get_8 (input_bfd
, contents
+ roff
);
2758 BFD_ASSERT (type
== 0xff);
2759 val
= bfd_get_8 (input_bfd
, contents
+ roff
+ 1);
2760 BFD_ASSERT (val
== 0x10);
2762 /* Now modify the instruction as appropriate. Use
2763 xchg %ax,%ax instead of 2 nops. */
2764 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
2765 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
2768 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
2770 unsigned int val
, type
;
2772 /* IE->LE transition:
2773 Originally it can be one of:
2781 BFD_ASSERT (rel
->r_offset
>= 1);
2782 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2783 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2786 /* movl foo, %eax. */
2787 bfd_put_8 (output_bfd
, 0xb8,
2788 contents
+ rel
->r_offset
- 1);
2792 BFD_ASSERT (rel
->r_offset
>= 2);
2793 type
= bfd_get_8 (input_bfd
,
2794 contents
+ rel
->r_offset
- 2);
2799 BFD_ASSERT ((val
& 0xc7) == 0x05);
2800 bfd_put_8 (output_bfd
, 0xc7,
2801 contents
+ rel
->r_offset
- 2);
2802 bfd_put_8 (output_bfd
,
2803 0xc0 | ((val
>> 3) & 7),
2804 contents
+ rel
->r_offset
- 1);
2808 BFD_ASSERT ((val
& 0xc7) == 0x05);
2809 bfd_put_8 (output_bfd
, 0x81,
2810 contents
+ rel
->r_offset
- 2);
2811 bfd_put_8 (output_bfd
,
2812 0xc0 | ((val
>> 3) & 7),
2813 contents
+ rel
->r_offset
- 1);
2820 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2821 contents
+ rel
->r_offset
);
2826 unsigned int val
, type
;
2828 /* {IE_32,GOTIE}->LE transition:
2829 Originally it can be one of:
2830 subl foo(%reg1), %reg2
2831 movl foo(%reg1), %reg2
2832 addl foo(%reg1), %reg2
2835 movl $foo, %reg2 (6 byte form)
2836 addl $foo, %reg2. */
2837 BFD_ASSERT (rel
->r_offset
>= 2);
2838 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2839 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2840 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2841 BFD_ASSERT ((val
& 0xc0) == 0x80 && (val
& 7) != 4);
2845 bfd_put_8 (output_bfd
, 0xc7,
2846 contents
+ rel
->r_offset
- 2);
2847 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2848 contents
+ rel
->r_offset
- 1);
2850 else if (type
== 0x2b)
2853 bfd_put_8 (output_bfd
, 0x81,
2854 contents
+ rel
->r_offset
- 2);
2855 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2856 contents
+ rel
->r_offset
- 1);
2858 else if (type
== 0x03)
2861 bfd_put_8 (output_bfd
, 0x81,
2862 contents
+ rel
->r_offset
- 2);
2863 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2864 contents
+ rel
->r_offset
- 1);
2868 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
2869 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2870 contents
+ rel
->r_offset
);
2872 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2873 contents
+ rel
->r_offset
);
2878 if (htab
->sgot
== NULL
)
2883 off
= h
->got
.offset
;
2884 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
2888 if (local_got_offsets
== NULL
)
2891 off
= local_got_offsets
[r_symndx
];
2892 offplt
= local_tlsdesc_gotents
[r_symndx
];
2899 Elf_Internal_Rela outrel
;
2904 if (htab
->srelgot
== NULL
)
2907 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2909 if (GOT_TLS_GDESC_P (tls_type
))
2911 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
2912 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
2913 <= htab
->sgotplt
->size
);
2914 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
2915 + htab
->sgotplt
->output_offset
2917 + htab
->sgotplt_jump_table_size
);
2918 sreloc
= htab
->srelplt
;
2919 loc
= sreloc
->contents
;
2920 loc
+= (htab
->next_tls_desc_index
++
2921 * sizeof (Elf32_External_Rel
));
2922 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
2923 <= sreloc
->contents
+ sreloc
->size
);
2924 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2927 BFD_ASSERT (! unresolved_reloc
);
2928 bfd_put_32 (output_bfd
,
2929 relocation
- dtpoff_base (info
),
2930 htab
->sgotplt
->contents
+ offplt
2931 + htab
->sgotplt_jump_table_size
+ 4);
2935 bfd_put_32 (output_bfd
, 0,
2936 htab
->sgotplt
->contents
+ offplt
2937 + htab
->sgotplt_jump_table_size
+ 4);
2941 sreloc
= htab
->srelgot
;
2943 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2944 + htab
->sgot
->output_offset
+ off
);
2946 if (GOT_TLS_GD_P (tls_type
))
2947 dr_type
= R_386_TLS_DTPMOD32
;
2948 else if (GOT_TLS_GDESC_P (tls_type
))
2950 else if (tls_type
== GOT_TLS_IE_POS
)
2951 dr_type
= R_386_TLS_TPOFF
;
2953 dr_type
= R_386_TLS_TPOFF32
;
2955 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
2956 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
2957 htab
->sgot
->contents
+ off
);
2958 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
2959 bfd_put_32 (output_bfd
, dtpoff_base (info
) - relocation
,
2960 htab
->sgot
->contents
+ off
);
2961 else if (dr_type
!= R_386_TLS_DESC
)
2962 bfd_put_32 (output_bfd
, 0,
2963 htab
->sgot
->contents
+ off
);
2964 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
2966 loc
= sreloc
->contents
;
2967 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2968 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
2969 <= sreloc
->contents
+ sreloc
->size
);
2970 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2972 if (GOT_TLS_GD_P (tls_type
))
2976 BFD_ASSERT (! unresolved_reloc
);
2977 bfd_put_32 (output_bfd
,
2978 relocation
- dtpoff_base (info
),
2979 htab
->sgot
->contents
+ off
+ 4);
2983 bfd_put_32 (output_bfd
, 0,
2984 htab
->sgot
->contents
+ off
+ 4);
2985 outrel
.r_info
= ELF32_R_INFO (indx
,
2986 R_386_TLS_DTPOFF32
);
2987 outrel
.r_offset
+= 4;
2988 sreloc
->reloc_count
++;
2989 loc
+= sizeof (Elf32_External_Rel
);
2990 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
2991 <= sreloc
->contents
+ sreloc
->size
);
2992 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2995 else if (tls_type
== GOT_TLS_IE_BOTH
)
2997 bfd_put_32 (output_bfd
,
2998 indx
== 0 ? relocation
- dtpoff_base (info
) : 0,
2999 htab
->sgot
->contents
+ off
+ 4);
3000 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3001 outrel
.r_offset
+= 4;
3002 sreloc
->reloc_count
++;
3003 loc
+= sizeof (Elf32_External_Rel
);
3004 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3011 local_got_offsets
[r_symndx
] |= 1;
3014 if (off
>= (bfd_vma
) -2
3015 && ! GOT_TLS_GDESC_P (tls_type
))
3017 if (r_type
== R_386_TLS_GOTDESC
3018 || r_type
== R_386_TLS_DESC_CALL
)
3020 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3021 unresolved_reloc
= FALSE
;
3023 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3025 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
3026 + htab
->sgotplt
->output_offset
;
3027 relocation
= htab
->sgot
->output_section
->vma
3028 + htab
->sgot
->output_offset
+ off
- g_o_t
;
3029 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3030 && tls_type
== GOT_TLS_IE_BOTH
)
3032 if (r_type
== R_386_TLS_IE
)
3033 relocation
+= g_o_t
;
3034 unresolved_reloc
= FALSE
;
3036 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3038 unsigned int val
, type
;
3041 /* GD->IE transition. */
3042 BFD_ASSERT (rel
->r_offset
>= 2);
3043 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3044 BFD_ASSERT (type
== 0x8d || type
== 0x04);
3045 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
3046 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
3048 BFD_ASSERT (rel
+ 1 < relend
);
3049 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
3050 roff
= rel
->r_offset
- 3;
3051 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3054 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3056 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3057 BFD_ASSERT (rel
->r_offset
>= 3);
3058 BFD_ASSERT (bfd_get_8 (input_bfd
,
3059 contents
+ rel
->r_offset
- 3)
3061 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
3066 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3068 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3069 BFD_ASSERT (rel
->r_offset
+ 10 <= input_section
->size
);
3070 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
3071 BFD_ASSERT (bfd_get_8 (input_bfd
,
3072 contents
+ rel
->r_offset
+ 9)
3074 roff
= rel
->r_offset
- 2;
3076 memcpy (contents
+ roff
,
3077 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3078 contents
[roff
+ 7] = 0x80 | (val
& 7);
3079 /* If foo is used only with foo@gotntpoff(%reg) and
3080 foo@indntpoff, but not with foo@gottpoff(%reg), change
3081 subl $foo@gottpoff(%reg), %eax
3083 addl $foo@gotntpoff(%reg), %eax. */
3084 if (tls_type
== GOT_TLS_IE_POS
)
3085 contents
[roff
+ 6] = 0x03;
3086 bfd_put_32 (output_bfd
,
3087 htab
->sgot
->output_section
->vma
3088 + htab
->sgot
->output_offset
+ off
3089 - htab
->sgotplt
->output_section
->vma
3090 - htab
->sgotplt
->output_offset
,
3091 contents
+ roff
+ 8);
3092 /* Skip R_386_PLT32. */
3096 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3098 /* GDesc -> IE transition.
3099 It's originally something like:
3100 leal x@tlsdesc(%ebx), %eax
3103 movl x@gotntpoff(%ebx), %eax # before nop; nop
3105 movl x@gottpoff(%ebx), %eax # before negl %eax
3107 Registers other than %eax may be set up here. */
3109 unsigned int val
, type
;
3112 /* First, make sure it's a leal adding ebx to a 32-bit
3113 offset into any register, although it's probably
3114 almost always going to be eax. */
3115 roff
= rel
->r_offset
;
3116 BFD_ASSERT (roff
>= 2);
3117 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3118 BFD_ASSERT (type
== 0x8d);
3119 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3120 BFD_ASSERT ((val
& 0xc7) == 0x83);
3121 BFD_ASSERT (roff
+ 4 <= input_section
->size
);
3123 /* Now modify the instruction as appropriate. */
3124 /* To turn a leal into a movl in the form we use it, it
3125 suffices to change the first byte from 0x8d to 0x8b.
3126 aoliva FIXME: should we decide to keep the leal, all
3127 we have to do is remove the statement below, and
3128 adjust the relaxation of R_386_TLS_DESC_CALL. */
3129 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3131 if (tls_type
== GOT_TLS_IE_BOTH
)
3134 bfd_put_32 (output_bfd
,
3135 htab
->sgot
->output_section
->vma
3136 + htab
->sgot
->output_offset
+ off
3137 - htab
->sgotplt
->output_section
->vma
3138 - htab
->sgotplt
->output_offset
,
3142 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3144 /* GDesc -> IE transition.
3152 depending on how we transformed the TLS_GOTDESC above.
3155 unsigned int val
, type
;
3158 /* First, make sure it's a call *(%eax). */
3159 roff
= rel
->r_offset
;
3160 BFD_ASSERT (roff
+ 2 <= input_section
->size
);
3161 type
= bfd_get_8 (input_bfd
, contents
+ roff
);
3162 BFD_ASSERT (type
== 0xff);
3163 val
= bfd_get_8 (input_bfd
, contents
+ roff
+ 1);
3164 BFD_ASSERT (val
== 0x10);
3166 /* Now modify the instruction as appropriate. */
3167 if (tls_type
!= GOT_TLS_IE_NEG
)
3170 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3171 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3176 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3177 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3191 /* LD->LE transition:
3193 leal foo(%reg), %eax; call ___tls_get_addr.
3195 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3196 BFD_ASSERT (rel
->r_offset
>= 2);
3197 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
3199 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3200 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
3201 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
3202 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
3204 BFD_ASSERT (rel
+ 1 < relend
);
3205 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
3206 memcpy (contents
+ rel
->r_offset
- 2,
3207 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3208 /* Skip R_386_PLT32. */
3213 if (htab
->sgot
== NULL
)
3216 off
= htab
->tls_ldm_got
.offset
;
3221 Elf_Internal_Rela outrel
;
3224 if (htab
->srelgot
== NULL
)
3227 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3228 + htab
->sgot
->output_offset
+ off
);
3230 bfd_put_32 (output_bfd
, 0,
3231 htab
->sgot
->contents
+ off
);
3232 bfd_put_32 (output_bfd
, 0,
3233 htab
->sgot
->contents
+ off
+ 4);
3234 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3235 loc
= htab
->srelgot
->contents
;
3236 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3237 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3238 htab
->tls_ldm_got
.offset
|= 1;
3240 relocation
= htab
->sgot
->output_section
->vma
3241 + htab
->sgot
->output_offset
+ off
3242 - htab
->sgotplt
->output_section
->vma
3243 - htab
->sgotplt
->output_offset
;
3244 unresolved_reloc
= FALSE
;
3247 case R_386_TLS_LDO_32
:
3248 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3249 relocation
-= dtpoff_base (info
);
3251 /* When converting LDO to LE, we must negate. */
3252 relocation
= -tpoff (info
, relocation
);
3255 case R_386_TLS_LE_32
:
3259 Elf_Internal_Rela outrel
;
3264 outrel
.r_offset
= rel
->r_offset
3265 + input_section
->output_section
->vma
3266 + input_section
->output_offset
;
3267 if (h
!= NULL
&& h
->dynindx
!= -1)
3271 if (r_type
== R_386_TLS_LE_32
)
3272 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3274 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3275 sreloc
= elf_section_data (input_section
)->sreloc
;
3278 loc
= sreloc
->contents
;
3279 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3280 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3283 else if (r_type
== R_386_TLS_LE_32
)
3284 relocation
= dtpoff_base (info
) - relocation
;
3286 relocation
-= dtpoff_base (info
);
3288 else if (r_type
== R_386_TLS_LE_32
)
3289 relocation
= tpoff (info
, relocation
);
3291 relocation
= -tpoff (info
, relocation
);
3298 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3299 because such sections are not SEC_ALLOC and thus ld.so will
3300 not process them. */
3301 if (unresolved_reloc
3302 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3305 (*_bfd_error_handler
)
3306 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3309 (long) rel
->r_offset
,
3311 h
->root
.root
.string
);
3315 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3316 contents
, rel
->r_offset
,
3319 if (r
!= bfd_reloc_ok
)
3324 name
= h
->root
.root
.string
;
3327 name
= bfd_elf_string_from_elf_section (input_bfd
,
3328 symtab_hdr
->sh_link
,
3333 name
= bfd_section_name (input_bfd
, sec
);
3336 if (r
== bfd_reloc_overflow
)
3338 if (! ((*info
->callbacks
->reloc_overflow
)
3339 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3340 (bfd_vma
) 0, input_bfd
, input_section
,
3346 (*_bfd_error_handler
)
3347 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3348 input_bfd
, input_section
,
3349 (long) rel
->r_offset
, name
, (int) r
);
3358 /* Finish up dynamic symbol handling. We set the contents of various
3359 dynamic sections here. */
3362 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3363 struct bfd_link_info
*info
,
3364 struct elf_link_hash_entry
*h
,
3365 Elf_Internal_Sym
*sym
)
3367 struct elf_i386_link_hash_table
*htab
;
3369 htab
= elf_i386_hash_table (info
);
3371 if (h
->plt
.offset
!= (bfd_vma
) -1)
3375 Elf_Internal_Rela rel
;
3378 /* This symbol has an entry in the procedure linkage table. Set
3381 if (h
->dynindx
== -1
3382 || htab
->splt
== NULL
3383 || htab
->sgotplt
== NULL
3384 || htab
->srelplt
== NULL
)
3387 /* Get the index in the procedure linkage table which
3388 corresponds to this symbol. This is the index of this symbol
3389 in all the symbols for which we are making plt entries. The
3390 first entry in the procedure linkage table is reserved. */
3391 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3393 /* Get the offset into the .got table of the entry that
3394 corresponds to this function. Each .got entry is 4 bytes.
3395 The first three are reserved. */
3396 got_offset
= (plt_index
+ 3) * 4;
3398 /* Fill in the entry in the procedure linkage table. */
3401 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3403 bfd_put_32 (output_bfd
,
3404 (htab
->sgotplt
->output_section
->vma
3405 + htab
->sgotplt
->output_offset
3407 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3409 if (htab
->is_vxworks
)
3411 int s
, k
, reloc_index
;
3413 /* Create the R_386_32 relocation referencing the GOT
3414 for this PLT entry. */
3416 /* S: Current slot number (zero-based). */
3417 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3418 /* K: Number of relocations for PLTResolve. */
3420 k
= PLTRESOLVE_RELOCS_SHLIB
;
3422 k
= PLTRESOLVE_RELOCS
;
3423 /* Skip the PLTresolve relocations, and the relocations for
3424 the other PLT slots. */
3425 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3426 loc
= (htab
->srelplt2
->contents
+ reloc_index
3427 * sizeof (Elf32_External_Rel
));
3429 rel
.r_offset
= (htab
->splt
->output_section
->vma
3430 + htab
->splt
->output_offset
3431 + h
->plt
.offset
+ 2),
3432 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3433 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3435 /* Create the R_386_32 relocation referencing the beginning of
3436 the PLT for this GOT entry. */
3437 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3438 + htab
->sgotplt
->output_offset
3440 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3441 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3442 loc
+ sizeof (Elf32_External_Rel
));
3447 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3449 bfd_put_32 (output_bfd
, got_offset
,
3450 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3453 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3454 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3455 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3456 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3458 /* Fill in the entry in the global offset table. */
3459 bfd_put_32 (output_bfd
,
3460 (htab
->splt
->output_section
->vma
3461 + htab
->splt
->output_offset
3464 htab
->sgotplt
->contents
+ got_offset
);
3466 /* Fill in the entry in the .rel.plt section. */
3467 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3468 + htab
->sgotplt
->output_offset
3470 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3471 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3472 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3474 if (!h
->def_regular
)
3476 /* Mark the symbol as undefined, rather than as defined in
3477 the .plt section. Leave the value if there were any
3478 relocations where pointer equality matters (this is a clue
3479 for the dynamic linker, to make function pointer
3480 comparisons work between an application and shared
3481 library), otherwise set it to zero. If a function is only
3482 called from a binary, there is no need to slow down
3483 shared libraries because of that. */
3484 sym
->st_shndx
= SHN_UNDEF
;
3485 if (!h
->pointer_equality_needed
)
3490 if (h
->got
.offset
!= (bfd_vma
) -1
3491 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
3492 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3494 Elf_Internal_Rela rel
;
3497 /* This symbol has an entry in the global offset table. Set it
3500 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3503 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3504 + htab
->sgot
->output_offset
3505 + (h
->got
.offset
& ~(bfd_vma
) 1));
3507 /* If this is a static link, or it is a -Bsymbolic link and the
3508 symbol is defined locally or was forced to be local because
3509 of a version file, we just want to emit a RELATIVE reloc.
3510 The entry in the global offset table will already have been
3511 initialized in the relocate_section function. */
3513 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3515 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3516 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3520 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3521 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3522 htab
->sgot
->contents
+ h
->got
.offset
);
3523 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3526 loc
= htab
->srelgot
->contents
;
3527 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3528 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3533 Elf_Internal_Rela rel
;
3536 /* This symbol needs a copy reloc. Set it up. */
3538 if (h
->dynindx
== -1
3539 || (h
->root
.type
!= bfd_link_hash_defined
3540 && h
->root
.type
!= bfd_link_hash_defweak
)
3541 || htab
->srelbss
== NULL
)
3544 rel
.r_offset
= (h
->root
.u
.def
.value
3545 + h
->root
.u
.def
.section
->output_section
->vma
3546 + h
->root
.u
.def
.section
->output_offset
);
3547 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3548 loc
= htab
->srelbss
->contents
;
3549 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3550 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3553 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3554 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3555 is relative to the ".got" section. */
3556 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3557 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
))
3558 sym
->st_shndx
= SHN_ABS
;
3563 /* Used to decide how to sort relocs in an optimal manner for the
3564 dynamic linker, before writing them out. */
3566 static enum elf_reloc_type_class
3567 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3569 switch (ELF32_R_TYPE (rela
->r_info
))
3571 case R_386_RELATIVE
:
3572 return reloc_class_relative
;
3573 case R_386_JUMP_SLOT
:
3574 return reloc_class_plt
;
3576 return reloc_class_copy
;
3578 return reloc_class_normal
;
3582 /* Finish up the dynamic sections. */
3585 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3586 struct bfd_link_info
*info
)
3588 struct elf_i386_link_hash_table
*htab
;
3592 htab
= elf_i386_hash_table (info
);
3593 dynobj
= htab
->elf
.dynobj
;
3594 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3596 if (htab
->elf
.dynamic_sections_created
)
3598 Elf32_External_Dyn
*dyncon
, *dynconend
;
3600 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3603 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3604 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3605 for (; dyncon
< dynconend
; dyncon
++)
3607 Elf_Internal_Dyn dyn
;
3610 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3619 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3624 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3629 dyn
.d_un
.d_val
= s
->size
;
3633 /* My reading of the SVR4 ABI indicates that the
3634 procedure linkage table relocs (DT_JMPREL) should be
3635 included in the overall relocs (DT_REL). This is
3636 what Solaris does. However, UnixWare can not handle
3637 that case. Therefore, we override the DT_RELSZ entry
3638 here to make it not include the JMPREL relocs. */
3642 dyn
.d_un
.d_val
-= s
->size
;
3646 /* We may not be using the standard ELF linker script.
3647 If .rel.plt is the first .rel section, we adjust
3648 DT_REL to not include it. */
3652 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3654 dyn
.d_un
.d_ptr
+= s
->size
;
3658 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3661 /* Fill in the first entry in the procedure linkage table. */
3662 if (htab
->splt
&& htab
->splt
->size
> 0)
3666 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3667 sizeof (elf_i386_pic_plt0_entry
));
3668 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3669 htab
->plt0_pad_byte
,
3670 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3674 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3675 sizeof(elf_i386_plt0_entry
));
3676 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3677 htab
->plt0_pad_byte
,
3678 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3679 bfd_put_32 (output_bfd
,
3680 (htab
->sgotplt
->output_section
->vma
3681 + htab
->sgotplt
->output_offset
3683 htab
->splt
->contents
+ 2);
3684 bfd_put_32 (output_bfd
,
3685 (htab
->sgotplt
->output_section
->vma
3686 + htab
->sgotplt
->output_offset
3688 htab
->splt
->contents
+ 8);
3690 if (htab
->is_vxworks
)
3692 Elf_Internal_Rela rel
;
3694 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3695 On IA32 we use REL relocations so the addend goes in
3696 the PLT directly. */
3697 rel
.r_offset
= (htab
->splt
->output_section
->vma
3698 + htab
->splt
->output_offset
3700 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3701 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3702 htab
->srelplt2
->contents
);
3703 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3704 rel
.r_offset
= (htab
->splt
->output_section
->vma
3705 + htab
->splt
->output_offset
3707 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3708 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3709 htab
->srelplt2
->contents
+
3710 sizeof (Elf32_External_Rel
));
3714 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3715 really seem like the right value. */
3716 elf_section_data (htab
->splt
->output_section
)
3717 ->this_hdr
.sh_entsize
= 4;
3719 /* Correct the .rel.plt.unloaded relocations. */
3720 if (htab
->is_vxworks
&& !info
->shared
)
3722 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
3725 p
= htab
->srelplt2
->contents
;
3727 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
3729 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
3731 for (; num_plts
; num_plts
--)
3733 Elf_Internal_Rela rel
;
3734 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3735 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3736 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3737 p
+= sizeof (Elf32_External_Rel
);
3739 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3740 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3741 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3742 p
+= sizeof (Elf32_External_Rel
);
3750 /* Fill in the first three entries in the global offset table. */
3751 if (htab
->sgotplt
->size
> 0)
3753 bfd_put_32 (output_bfd
,
3755 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3756 htab
->sgotplt
->contents
);
3757 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
3758 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
3761 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
3764 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3765 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3770 /* Return address for Ith PLT stub in section PLT, for relocation REL
3771 or (bfd_vma) -1 if it should not be included. */
3774 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
3775 const arelent
*rel ATTRIBUTE_UNUSED
)
3777 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
3780 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
3783 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
3785 if (h
->plt
.offset
!= (bfd_vma
) -1
3787 && !h
->pointer_equality_needed
)
3790 return _bfd_elf_hash_symbol (h
);
3793 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3794 #define TARGET_LITTLE_NAME "elf32-i386"
3795 #define ELF_ARCH bfd_arch_i386
3796 #define ELF_MACHINE_CODE EM_386
3797 #define ELF_MAXPAGESIZE 0x1000
3799 #define elf_backend_can_gc_sections 1
3800 #define elf_backend_can_refcount 1
3801 #define elf_backend_want_got_plt 1
3802 #define elf_backend_plt_readonly 1
3803 #define elf_backend_want_plt_sym 0
3804 #define elf_backend_got_header_size 12
3806 /* Support RELA for objdump of prelink objects. */
3807 #define elf_info_to_howto elf_i386_info_to_howto_rel
3808 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3810 #define bfd_elf32_mkobject elf_i386_mkobject
3812 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3813 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3814 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3815 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
3817 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3818 #define elf_backend_check_relocs elf_i386_check_relocs
3819 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3820 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3821 #define elf_backend_fake_sections elf_i386_fake_sections
3822 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3823 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3824 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3825 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3826 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3827 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3828 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3829 #define elf_backend_relocate_section elf_i386_relocate_section
3830 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3831 #define elf_backend_always_size_sections elf_i386_always_size_sections
3832 #define elf_backend_omit_section_dynsym \
3833 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
3834 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3835 #define elf_backend_hash_symbol elf_i386_hash_symbol
3837 #include "elf32-target.h"
3839 /* FreeBSD support. */
3841 #undef TARGET_LITTLE_SYM
3842 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3843 #undef TARGET_LITTLE_NAME
3844 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3846 #define ELF_OSABI ELFOSABI_FREEBSD
3848 /* The kernel recognizes executables as valid only if they carry a
3849 "FreeBSD" label in the ELF header. So we put this label on all
3850 executables and (for simplicity) also all other object files. */
3853 elf_i386_post_process_headers (bfd
*abfd
,
3854 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3856 Elf_Internal_Ehdr
*i_ehdrp
;
3858 i_ehdrp
= elf_elfheader (abfd
);
3860 /* Put an ABI label supported by FreeBSD >= 4.1. */
3861 i_ehdrp
->e_ident
[EI_OSABI
] = get_elf_backend_data (abfd
)->elf_osabi
;
3862 #ifdef OLD_FREEBSD_ABI_LABEL
3863 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3864 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
3868 #undef elf_backend_post_process_headers
3869 #define elf_backend_post_process_headers elf_i386_post_process_headers
3871 #define elf32_bed elf32_i386_fbsd_bed
3873 #include "elf32-target.h"
3875 /* VxWorks support. */
3877 #undef TARGET_LITTLE_SYM
3878 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3879 #undef TARGET_LITTLE_NAME
3880 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3883 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3885 static struct bfd_link_hash_table
*
3886 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
3888 struct bfd_link_hash_table
*ret
;
3889 struct elf_i386_link_hash_table
*htab
;
3891 ret
= elf_i386_link_hash_table_create (abfd
);
3894 htab
= (struct elf_i386_link_hash_table
*) ret
;
3895 htab
->is_vxworks
= 1;
3896 htab
->plt0_pad_byte
= 0x90;
3903 #undef elf_backend_post_process_headers
3904 #undef bfd_elf32_bfd_link_hash_table_create
3905 #define bfd_elf32_bfd_link_hash_table_create \
3906 elf_i386_vxworks_link_hash_table_create
3907 #undef elf_backend_add_symbol_hook
3908 #define elf_backend_add_symbol_hook \
3909 elf_vxworks_add_symbol_hook
3910 #undef elf_backend_link_output_symbol_hook
3911 #define elf_backend_link_output_symbol_hook \
3912 elf_vxworks_link_output_symbol_hook
3913 #undef elf_backend_emit_relocs
3914 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3915 #undef elf_backend_final_write_processing
3916 #define elf_backend_final_write_processing \
3917 elf_vxworks_final_write_processing
3919 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
3921 #undef elf_backend_want_plt_sym
3922 #define elf_backend_want_plt_sym 1
3925 #define elf32_bed elf32_i386_vxworks_bed
3927 #include "elf32-target.h"