1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
4 Free Software Foundation, Inc.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 MA 02110-1301, USA. */
29 #include "elf-vxworks.h"
30 #include "bfd_stdint.h"
35 /* 386 uses REL relocations instead of RELA. */
40 static reloc_howto_type elf_howto_table
[]=
42 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
43 bfd_elf_generic_reloc
, "R_386_NONE",
44 TRUE
, 0x00000000, 0x00000000, FALSE
),
45 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
46 bfd_elf_generic_reloc
, "R_386_32",
47 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
48 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
49 bfd_elf_generic_reloc
, "R_386_PC32",
50 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
51 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
52 bfd_elf_generic_reloc
, "R_386_GOT32",
53 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
54 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
55 bfd_elf_generic_reloc
, "R_386_PLT32",
56 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
57 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
58 bfd_elf_generic_reloc
, "R_386_COPY",
59 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
60 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
61 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
62 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
63 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
65 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
66 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_386_RELATIVE",
68 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
69 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_386_GOTOFF",
71 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
72 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_386_GOTPC",
74 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
76 /* We have a gap in the reloc numbers here.
77 R_386_standard counts the number up to this point, and
78 R_386_ext_offset is the value to subtract from a reloc type of
79 R_386_16 thru R_386_PC8 to form an index into this table. */
80 #define R_386_standard (R_386_GOTPC + 1)
81 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
83 /* These relocs are a GNU extension. */
84 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
86 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
87 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_386_TLS_IE",
89 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
90 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
92 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
93 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_386_TLS_LE",
95 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
96 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_386_TLS_GD",
98 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
99 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
101 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
102 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_386_16",
104 TRUE
, 0xffff, 0xffff, FALSE
),
105 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_386_PC16",
107 TRUE
, 0xffff, 0xffff, TRUE
),
108 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
109 bfd_elf_generic_reloc
, "R_386_8",
110 TRUE
, 0xff, 0xff, FALSE
),
111 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
112 bfd_elf_generic_reloc
, "R_386_PC8",
113 TRUE
, 0xff, 0xff, TRUE
),
115 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
116 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
117 /* These are common with Solaris TLS implementation. */
118 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
119 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
120 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
121 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
123 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
124 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
125 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
126 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
127 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
129 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
130 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
132 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
133 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
134 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
135 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
136 HOWTO(R_386_SIZE32
, 0, 2, 32, FALSE
, 0, complain_overflow_unsigned
,
137 bfd_elf_generic_reloc
, "R_386_SIZE32",
138 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
139 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
140 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
141 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
142 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
143 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
145 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
146 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
147 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
148 HOWTO(R_386_IRELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
149 bfd_elf_generic_reloc
, "R_386_IRELATIVE",
150 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
153 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
154 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
156 /* GNU extension to record C++ vtable hierarchy. */
157 HOWTO (R_386_GNU_VTINHERIT
, /* type */
159 2, /* size (0 = byte, 1 = short, 2 = long) */
161 FALSE
, /* pc_relative */
163 complain_overflow_dont
, /* complain_on_overflow */
164 NULL
, /* special_function */
165 "R_386_GNU_VTINHERIT", /* name */
166 FALSE
, /* partial_inplace */
169 FALSE
), /* pcrel_offset */
171 /* GNU extension to record C++ vtable member usage. */
172 HOWTO (R_386_GNU_VTENTRY
, /* type */
174 2, /* size (0 = byte, 1 = short, 2 = long) */
176 FALSE
, /* pc_relative */
178 complain_overflow_dont
, /* complain_on_overflow */
179 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
180 "R_386_GNU_VTENTRY", /* name */
181 FALSE
, /* partial_inplace */
184 FALSE
) /* pcrel_offset */
186 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
190 #ifdef DEBUG_GEN_RELOC
192 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
197 static reloc_howto_type
*
198 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
199 bfd_reloc_code_real_type code
)
204 TRACE ("BFD_RELOC_NONE");
205 return &elf_howto_table
[R_386_NONE
];
208 TRACE ("BFD_RELOC_32");
209 return &elf_howto_table
[R_386_32
];
212 TRACE ("BFD_RELOC_CTOR");
213 return &elf_howto_table
[R_386_32
];
215 case BFD_RELOC_32_PCREL
:
216 TRACE ("BFD_RELOC_PC32");
217 return &elf_howto_table
[R_386_PC32
];
219 case BFD_RELOC_386_GOT32
:
220 TRACE ("BFD_RELOC_386_GOT32");
221 return &elf_howto_table
[R_386_GOT32
];
223 case BFD_RELOC_386_PLT32
:
224 TRACE ("BFD_RELOC_386_PLT32");
225 return &elf_howto_table
[R_386_PLT32
];
227 case BFD_RELOC_386_COPY
:
228 TRACE ("BFD_RELOC_386_COPY");
229 return &elf_howto_table
[R_386_COPY
];
231 case BFD_RELOC_386_GLOB_DAT
:
232 TRACE ("BFD_RELOC_386_GLOB_DAT");
233 return &elf_howto_table
[R_386_GLOB_DAT
];
235 case BFD_RELOC_386_JUMP_SLOT
:
236 TRACE ("BFD_RELOC_386_JUMP_SLOT");
237 return &elf_howto_table
[R_386_JUMP_SLOT
];
239 case BFD_RELOC_386_RELATIVE
:
240 TRACE ("BFD_RELOC_386_RELATIVE");
241 return &elf_howto_table
[R_386_RELATIVE
];
243 case BFD_RELOC_386_GOTOFF
:
244 TRACE ("BFD_RELOC_386_GOTOFF");
245 return &elf_howto_table
[R_386_GOTOFF
];
247 case BFD_RELOC_386_GOTPC
:
248 TRACE ("BFD_RELOC_386_GOTPC");
249 return &elf_howto_table
[R_386_GOTPC
];
251 /* These relocs are a GNU extension. */
252 case BFD_RELOC_386_TLS_TPOFF
:
253 TRACE ("BFD_RELOC_386_TLS_TPOFF");
254 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
256 case BFD_RELOC_386_TLS_IE
:
257 TRACE ("BFD_RELOC_386_TLS_IE");
258 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
260 case BFD_RELOC_386_TLS_GOTIE
:
261 TRACE ("BFD_RELOC_386_TLS_GOTIE");
262 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
264 case BFD_RELOC_386_TLS_LE
:
265 TRACE ("BFD_RELOC_386_TLS_LE");
266 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
268 case BFD_RELOC_386_TLS_GD
:
269 TRACE ("BFD_RELOC_386_TLS_GD");
270 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
272 case BFD_RELOC_386_TLS_LDM
:
273 TRACE ("BFD_RELOC_386_TLS_LDM");
274 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
277 TRACE ("BFD_RELOC_16");
278 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
280 case BFD_RELOC_16_PCREL
:
281 TRACE ("BFD_RELOC_16_PCREL");
282 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
285 TRACE ("BFD_RELOC_8");
286 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
288 case BFD_RELOC_8_PCREL
:
289 TRACE ("BFD_RELOC_8_PCREL");
290 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
292 /* Common with Sun TLS implementation. */
293 case BFD_RELOC_386_TLS_LDO_32
:
294 TRACE ("BFD_RELOC_386_TLS_LDO_32");
295 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
297 case BFD_RELOC_386_TLS_IE_32
:
298 TRACE ("BFD_RELOC_386_TLS_IE_32");
299 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
301 case BFD_RELOC_386_TLS_LE_32
:
302 TRACE ("BFD_RELOC_386_TLS_LE_32");
303 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
305 case BFD_RELOC_386_TLS_DTPMOD32
:
306 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
307 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
309 case BFD_RELOC_386_TLS_DTPOFF32
:
310 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
311 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
313 case BFD_RELOC_386_TLS_TPOFF32
:
314 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
315 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
317 case BFD_RELOC_SIZE32
:
318 TRACE ("BFD_RELOC_SIZE32");
319 return &elf_howto_table
[R_386_SIZE32
- R_386_tls_offset
];
321 case BFD_RELOC_386_TLS_GOTDESC
:
322 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
323 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
325 case BFD_RELOC_386_TLS_DESC_CALL
:
326 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
327 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
329 case BFD_RELOC_386_TLS_DESC
:
330 TRACE ("BFD_RELOC_386_TLS_DESC");
331 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
333 case BFD_RELOC_386_IRELATIVE
:
334 TRACE ("BFD_RELOC_386_IRELATIVE");
335 return &elf_howto_table
[R_386_IRELATIVE
- R_386_tls_offset
];
337 case BFD_RELOC_VTABLE_INHERIT
:
338 TRACE ("BFD_RELOC_VTABLE_INHERIT");
339 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
341 case BFD_RELOC_VTABLE_ENTRY
:
342 TRACE ("BFD_RELOC_VTABLE_ENTRY");
343 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
353 static reloc_howto_type
*
354 elf_i386_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
359 for (i
= 0; i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]); i
++)
360 if (elf_howto_table
[i
].name
!= NULL
361 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
362 return &elf_howto_table
[i
];
367 static reloc_howto_type
*
368 elf_i386_rtype_to_howto (bfd
*abfd
, unsigned r_type
)
372 if ((indx
= r_type
) >= R_386_standard
373 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
374 >= R_386_ext
- R_386_standard
)
375 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
376 >= R_386_irelative
- R_386_ext
)
377 && ((indx
= r_type
- R_386_vt_offset
) - R_386_irelative
378 >= R_386_vt
- R_386_irelative
))
380 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
384 BFD_ASSERT (elf_howto_table
[indx
].type
== r_type
);
385 return &elf_howto_table
[indx
];
389 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
391 Elf_Internal_Rela
*dst
)
393 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
394 cache_ptr
->howto
= elf_i386_rtype_to_howto (abfd
, r_type
);
397 /* Return whether a symbol name implies a local label. The UnixWare
398 2.1 cc generates temporary symbols that start with .X, so we
399 recognize them here. FIXME: do other SVR4 compilers also use .X?.
400 If so, we should move the .X recognition into
401 _bfd_elf_is_local_label_name. */
404 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
406 if (name
[0] == '.' && name
[1] == 'X')
409 return _bfd_elf_is_local_label_name (abfd
, name
);
412 /* Support for core dump NOTE sections. */
415 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
420 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
422 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
428 elf_tdata (abfd
)->core
->signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
431 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
435 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
439 switch (note
->descsz
)
444 case 144: /* Linux/i386 */
446 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
449 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
459 /* Make a ".reg/999" section. */
460 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
461 size
, note
->descpos
+ offset
);
465 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
467 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
469 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
474 elf_tdata (abfd
)->core
->program
475 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
476 elf_tdata (abfd
)->core
->command
477 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
481 switch (note
->descsz
)
486 case 124: /* Linux/i386 elf_prpsinfo. */
487 elf_tdata (abfd
)->core
->pid
488 = bfd_get_32 (abfd
, note
->descdata
+ 12);
489 elf_tdata (abfd
)->core
->program
490 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
491 elf_tdata (abfd
)->core
->command
492 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
496 /* Note that for some reason, a spurious space is tacked
497 onto the end of the args in some (at least one anyway)
498 implementations, so strip it off if it exists. */
500 char *command
= elf_tdata (abfd
)->core
->command
;
501 int n
= strlen (command
);
503 if (0 < n
&& command
[n
- 1] == ' ')
504 command
[n
- 1] = '\0';
510 /* Functions for the i386 ELF linker.
512 In order to gain some understanding of code in this file without
513 knowing all the intricate details of the linker, note the
516 Functions named elf_i386_* are called by external routines, other
517 functions are only called locally. elf_i386_* functions appear
518 in this file more or less in the order in which they are called
519 from external routines. eg. elf_i386_check_relocs is called
520 early in the link process, elf_i386_finish_dynamic_sections is
521 one of the last functions. */
524 /* The name of the dynamic interpreter. This is put in the .interp
527 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
529 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
530 copying dynamic variables from a shared lib into an app's dynbss
531 section, and instead use a dynamic relocation to point into the
533 #define ELIMINATE_COPY_RELOCS 1
535 /* The size in bytes of an entry in the procedure linkage table. */
537 #define PLT_ENTRY_SIZE 16
539 /* The first entry in an absolute procedure linkage table looks like
540 this. See the SVR4 ABI i386 supplement to see how this works.
541 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
543 static const bfd_byte elf_i386_plt0_entry
[12] =
545 0xff, 0x35, /* pushl contents of address */
546 0, 0, 0, 0, /* replaced with address of .got + 4. */
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0 /* replaced with address of .got + 8. */
551 /* Subsequent entries in an absolute procedure linkage table look like
554 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
556 0xff, 0x25, /* jmp indirect */
557 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
558 0x68, /* pushl immediate */
559 0, 0, 0, 0, /* replaced with offset into relocation table. */
560 0xe9, /* jmp relative */
561 0, 0, 0, 0 /* replaced with offset to start of .plt. */
564 /* The first entry in a PIC procedure linkage table look like this.
565 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
567 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
569 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
570 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
573 /* Subsequent entries in a PIC procedure linkage table look like this. */
575 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
577 0xff, 0xa3, /* jmp *offset(%ebx) */
578 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
579 0x68, /* pushl immediate */
580 0, 0, 0, 0, /* replaced with offset into relocation table. */
581 0xe9, /* jmp relative */
582 0, 0, 0, 0 /* replaced with offset to start of .plt. */
585 /* .eh_frame covering the .plt section. */
587 static const bfd_byte elf_i386_eh_frame_plt
[] =
589 #define PLT_CIE_LENGTH 20
590 #define PLT_FDE_LENGTH 36
591 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
592 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
593 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
594 0, 0, 0, 0, /* CIE ID */
596 'z', 'R', 0, /* Augmentation string */
597 1, /* Code alignment factor */
598 0x7c, /* Data alignment factor */
599 8, /* Return address column */
600 1, /* Augmentation size */
601 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
602 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
603 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
604 DW_CFA_nop
, DW_CFA_nop
,
606 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
607 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
608 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
609 0, 0, 0, 0, /* .plt size goes here */
610 0, /* Augmentation size */
611 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
612 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
613 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
614 DW_CFA_advance_loc
+ 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
615 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
616 11, /* Block length */
617 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
618 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
619 DW_OP_lit15
, DW_OP_and
, DW_OP_lit11
, DW_OP_ge
,
620 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
621 DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
, DW_CFA_nop
624 struct elf_i386_plt_layout
626 /* The first entry in an absolute procedure linkage table looks like this. */
627 const bfd_byte
*plt0_entry
;
628 unsigned int plt0_entry_size
;
630 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
631 unsigned int plt0_got1_offset
;
632 unsigned int plt0_got2_offset
;
634 /* Later entries in an absolute procedure linkage table look like this. */
635 const bfd_byte
*plt_entry
;
636 unsigned int plt_entry_size
;
638 /* Offsets into plt_entry that are to be replaced with... */
639 unsigned int plt_got_offset
; /* ... address of this symbol in .got. */
640 unsigned int plt_reloc_offset
; /* ... offset into relocation table. */
641 unsigned int plt_plt_offset
; /* ... offset to start of .plt. */
643 /* Offset into plt_entry where the initial value of the GOT entry points. */
644 unsigned int plt_lazy_offset
;
646 /* The first entry in a PIC procedure linkage table looks like this. */
647 const bfd_byte
*pic_plt0_entry
;
649 /* Subsequent entries in a PIC procedure linkage table look like this. */
650 const bfd_byte
*pic_plt_entry
;
652 /* .eh_frame covering the .plt section. */
653 const bfd_byte
*eh_frame_plt
;
654 unsigned int eh_frame_plt_size
;
657 #define GET_PLT_ENTRY_SIZE(abfd) \
658 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
660 /* These are the standard parameters. */
661 static const struct elf_i386_plt_layout elf_i386_plt
=
663 elf_i386_plt0_entry
, /* plt0_entry */
664 sizeof (elf_i386_plt0_entry
), /* plt0_entry_size */
665 2, /* plt0_got1_offset */
666 8, /* plt0_got2_offset */
667 elf_i386_plt_entry
, /* plt_entry */
668 PLT_ENTRY_SIZE
, /* plt_entry_size */
669 2, /* plt_got_offset */
670 7, /* plt_reloc_offset */
671 12, /* plt_plt_offset */
672 6, /* plt_lazy_offset */
673 elf_i386_pic_plt0_entry
, /* pic_plt0_entry */
674 elf_i386_pic_plt_entry
, /* pic_plt_entry */
675 elf_i386_eh_frame_plt
, /* eh_frame_plt */
676 sizeof (elf_i386_eh_frame_plt
), /* eh_frame_plt_size */
680 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
681 for the PLTResolve stub and then for each PLT entry. */
682 #define PLTRESOLVE_RELOCS_SHLIB 0
683 #define PLTRESOLVE_RELOCS 2
684 #define PLT_NON_JUMP_SLOT_RELOCS 2
686 /* Architecture-specific backend data for i386. */
688 struct elf_i386_backend_data
690 /* Parameters describing PLT generation. */
691 const struct elf_i386_plt_layout
*plt
;
693 /* Value used to fill the unused bytes of the first PLT entry. */
694 bfd_byte plt0_pad_byte
;
696 /* True if the target system is VxWorks. */
700 #define get_elf_i386_backend_data(abfd) \
701 ((const struct elf_i386_backend_data *) \
702 get_elf_backend_data (abfd)->arch_data)
704 /* These are the standard parameters. */
705 static const struct elf_i386_backend_data elf_i386_arch_bed
=
707 &elf_i386_plt
, /* plt */
708 0, /* plt0_pad_byte */
712 #define elf_backend_arch_data &elf_i386_arch_bed
714 /* i386 ELF linker hash entry. */
716 struct elf_i386_link_hash_entry
718 struct elf_link_hash_entry elf
;
720 /* Track dynamic relocs copied for this symbol. */
721 struct elf_dyn_relocs
*dyn_relocs
;
723 #define GOT_UNKNOWN 0
727 #define GOT_TLS_IE_POS 5
728 #define GOT_TLS_IE_NEG 6
729 #define GOT_TLS_IE_BOTH 7
730 #define GOT_TLS_GDESC 8
731 #define GOT_TLS_GD_BOTH_P(type) \
732 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
733 #define GOT_TLS_GD_P(type) \
734 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
735 #define GOT_TLS_GDESC_P(type) \
736 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
737 #define GOT_TLS_GD_ANY_P(type) \
738 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
739 unsigned char tls_type
;
741 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
742 starting at the end of the jump table. */
746 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
748 struct elf_i386_obj_tdata
750 struct elf_obj_tdata root
;
752 /* tls_type for each local got entry. */
753 char *local_got_tls_type
;
755 /* GOTPLT entries for TLS descriptors. */
756 bfd_vma
*local_tlsdesc_gotent
;
759 #define elf_i386_tdata(abfd) \
760 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
762 #define elf_i386_local_got_tls_type(abfd) \
763 (elf_i386_tdata (abfd)->local_got_tls_type)
765 #define elf_i386_local_tlsdesc_gotent(abfd) \
766 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
768 #define is_i386_elf(bfd) \
769 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
770 && elf_tdata (bfd) != NULL \
771 && elf_object_id (bfd) == I386_ELF_DATA)
774 elf_i386_mkobject (bfd
*abfd
)
776 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_i386_obj_tdata
),
780 /* i386 ELF linker hash table. */
782 struct elf_i386_link_hash_table
784 struct elf_link_hash_table elf
;
786 /* Short-cuts to get to dynamic linker sections. */
789 asection
*plt_eh_frame
;
793 bfd_signed_vma refcount
;
797 /* The amount of space used by the reserved portion of the sgotplt
798 section, plus whatever space is used by the jump slots. */
799 bfd_vma sgotplt_jump_table_size
;
801 /* Small local sym cache. */
802 struct sym_cache sym_cache
;
804 /* _TLS_MODULE_BASE_ symbol. */
805 struct bfd_link_hash_entry
*tls_module_base
;
807 /* Used by local STT_GNU_IFUNC symbols. */
808 htab_t loc_hash_table
;
809 void * loc_hash_memory
;
811 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
814 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
815 bfd_vma next_tls_desc_index
;
817 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
818 bfd_vma next_jump_slot_index
;
820 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
821 bfd_vma next_irelative_index
;
824 /* Get the i386 ELF linker hash table from a link_info structure. */
826 #define elf_i386_hash_table(p) \
827 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
828 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
830 #define elf_i386_compute_jump_table_size(htab) \
831 ((htab)->next_tls_desc_index * 4)
833 /* Create an entry in an i386 ELF linker hash table. */
835 static struct bfd_hash_entry
*
836 elf_i386_link_hash_newfunc (struct bfd_hash_entry
*entry
,
837 struct bfd_hash_table
*table
,
840 /* Allocate the structure if it has not already been allocated by a
844 entry
= (struct bfd_hash_entry
*)
845 bfd_hash_allocate (table
, sizeof (struct elf_i386_link_hash_entry
));
850 /* Call the allocation method of the superclass. */
851 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
854 struct elf_i386_link_hash_entry
*eh
;
856 eh
= (struct elf_i386_link_hash_entry
*) entry
;
857 eh
->dyn_relocs
= NULL
;
858 eh
->tls_type
= GOT_UNKNOWN
;
859 eh
->tlsdesc_got
= (bfd_vma
) -1;
865 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
866 for local symbol so that we can handle local STT_GNU_IFUNC symbols
867 as global symbol. We reuse indx and dynstr_index for local symbol
868 hash since they aren't used by global symbols in this backend. */
871 elf_i386_local_htab_hash (const void *ptr
)
873 struct elf_link_hash_entry
*h
874 = (struct elf_link_hash_entry
*) ptr
;
875 return ELF_LOCAL_SYMBOL_HASH (h
->indx
, h
->dynstr_index
);
878 /* Compare local hash entries. */
881 elf_i386_local_htab_eq (const void *ptr1
, const void *ptr2
)
883 struct elf_link_hash_entry
*h1
884 = (struct elf_link_hash_entry
*) ptr1
;
885 struct elf_link_hash_entry
*h2
886 = (struct elf_link_hash_entry
*) ptr2
;
888 return h1
->indx
== h2
->indx
&& h1
->dynstr_index
== h2
->dynstr_index
;
891 /* Find and/or create a hash entry for local symbol. */
893 static struct elf_link_hash_entry
*
894 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table
*htab
,
895 bfd
*abfd
, const Elf_Internal_Rela
*rel
,
898 struct elf_i386_link_hash_entry e
, *ret
;
899 asection
*sec
= abfd
->sections
;
900 hashval_t h
= ELF_LOCAL_SYMBOL_HASH (sec
->id
,
901 ELF32_R_SYM (rel
->r_info
));
904 e
.elf
.indx
= sec
->id
;
905 e
.elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
906 slot
= htab_find_slot_with_hash (htab
->loc_hash_table
, &e
, h
,
907 create
? INSERT
: NO_INSERT
);
914 ret
= (struct elf_i386_link_hash_entry
*) *slot
;
918 ret
= (struct elf_i386_link_hash_entry
*)
919 objalloc_alloc ((struct objalloc
*) htab
->loc_hash_memory
,
920 sizeof (struct elf_i386_link_hash_entry
));
923 memset (ret
, 0, sizeof (*ret
));
924 ret
->elf
.indx
= sec
->id
;
925 ret
->elf
.dynstr_index
= ELF32_R_SYM (rel
->r_info
);
926 ret
->elf
.dynindx
= -1;
932 /* Create an i386 ELF linker hash table. */
934 static struct bfd_link_hash_table
*
935 elf_i386_link_hash_table_create (bfd
*abfd
)
937 struct elf_i386_link_hash_table
*ret
;
938 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
940 ret
= (struct elf_i386_link_hash_table
*) bfd_zmalloc (amt
);
944 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
,
945 elf_i386_link_hash_newfunc
,
946 sizeof (struct elf_i386_link_hash_entry
),
953 ret
->loc_hash_table
= htab_try_create (1024,
954 elf_i386_local_htab_hash
,
955 elf_i386_local_htab_eq
,
957 ret
->loc_hash_memory
= objalloc_create ();
958 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
964 return &ret
->elf
.root
;
967 /* Destroy an i386 ELF linker hash table. */
970 elf_i386_link_hash_table_free (struct bfd_link_hash_table
*hash
)
972 struct elf_i386_link_hash_table
*htab
973 = (struct elf_i386_link_hash_table
*) hash
;
975 if (htab
->loc_hash_table
)
976 htab_delete (htab
->loc_hash_table
);
977 if (htab
->loc_hash_memory
)
978 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
979 _bfd_elf_link_hash_table_free (hash
);
982 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
983 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
987 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
989 struct elf_i386_link_hash_table
*htab
;
991 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
994 htab
= elf_i386_hash_table (info
);
998 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1000 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rel.bss");
1003 || (!info
->shared
&& !htab
->srelbss
))
1006 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1007 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1011 if (!info
->no_ld_generated_unwind_info
1012 && htab
->plt_eh_frame
== NULL
1013 && htab
->elf
.splt
!= NULL
)
1015 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1016 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1017 | SEC_LINKER_CREATED
);
1019 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1020 if (htab
->plt_eh_frame
== NULL
1021 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1028 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1031 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1032 struct elf_link_hash_entry
*dir
,
1033 struct elf_link_hash_entry
*ind
)
1035 struct elf_i386_link_hash_entry
*edir
, *eind
;
1037 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1038 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1040 if (eind
->dyn_relocs
!= NULL
)
1042 if (edir
->dyn_relocs
!= NULL
)
1044 struct elf_dyn_relocs
**pp
;
1045 struct elf_dyn_relocs
*p
;
1047 /* Add reloc counts against the indirect sym to the direct sym
1048 list. Merge any entries against the same section. */
1049 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1051 struct elf_dyn_relocs
*q
;
1053 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1054 if (q
->sec
== p
->sec
)
1056 q
->pc_count
+= p
->pc_count
;
1057 q
->count
+= p
->count
;
1064 *pp
= edir
->dyn_relocs
;
1067 edir
->dyn_relocs
= eind
->dyn_relocs
;
1068 eind
->dyn_relocs
= NULL
;
1071 if (ind
->root
.type
== bfd_link_hash_indirect
1072 && dir
->got
.refcount
<= 0)
1074 edir
->tls_type
= eind
->tls_type
;
1075 eind
->tls_type
= GOT_UNKNOWN
;
1078 if (ELIMINATE_COPY_RELOCS
1079 && ind
->root
.type
!= bfd_link_hash_indirect
1080 && dir
->dynamic_adjusted
)
1082 /* If called to transfer flags for a weakdef during processing
1083 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1084 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1085 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1086 dir
->ref_regular
|= ind
->ref_regular
;
1087 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1088 dir
->needs_plt
|= ind
->needs_plt
;
1089 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1092 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1095 /* Return TRUE if the TLS access code sequence support transition
1099 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1101 Elf_Internal_Shdr
*symtab_hdr
,
1102 struct elf_link_hash_entry
**sym_hashes
,
1103 unsigned int r_type
,
1104 const Elf_Internal_Rela
*rel
,
1105 const Elf_Internal_Rela
*relend
)
1107 unsigned int val
, type
;
1108 unsigned long r_symndx
;
1109 struct elf_link_hash_entry
*h
;
1112 /* Get the section contents. */
1113 if (contents
== NULL
)
1115 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1116 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1119 /* FIXME: How to better handle error condition? */
1120 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1123 /* Cache the section contents for elf_link_input_bfd. */
1124 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1128 offset
= rel
->r_offset
;
1133 if (offset
< 2 || (rel
+ 1) >= relend
)
1136 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1137 if (r_type
== R_386_TLS_GD
)
1139 /* Check transition from GD access model. Only
1140 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1141 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1142 can transit to different access model. */
1143 if ((offset
+ 10) > sec
->size
||
1144 (type
!= 0x8d && type
!= 0x04))
1147 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1150 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1154 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1157 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1162 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1163 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1166 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1172 /* Check transition from LD access model. Only
1173 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1174 can transit to different access model. */
1175 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1178 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1179 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1183 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1186 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1187 if (r_symndx
< symtab_hdr
->sh_info
)
1190 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1191 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1192 may be versioned. */
1194 && h
->root
.root
.string
!= NULL
1195 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1196 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1197 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1201 /* Check transition from IE access model:
1202 movl foo@indntpoff(%rip), %eax
1203 movl foo@indntpoff(%rip), %reg
1204 addl foo@indntpoff(%rip), %reg
1207 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1210 /* Check "movl foo@tpoff(%rip), %eax" first. */
1211 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1218 /* Check movl|addl foo@tpoff(%rip), %reg. */
1219 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1220 return ((type
== 0x8b || type
== 0x03)
1221 && (val
& 0xc7) == 0x05);
1223 case R_386_TLS_GOTIE
:
1224 case R_386_TLS_IE_32
:
1225 /* Check transition from {IE_32,GOTIE} access model:
1226 subl foo@{tpoff,gontoff}(%reg1), %reg2
1227 movl foo@{tpoff,gontoff}(%reg1), %reg2
1228 addl foo@{tpoff,gontoff}(%reg1), %reg2
1231 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1234 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1235 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1238 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1239 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1241 case R_386_TLS_GOTDESC
:
1242 /* Check transition from GDesc access model:
1243 leal x@tlsdesc(%ebx), %eax
1245 Make sure it's a leal adding ebx to a 32-bit offset
1246 into any register, although it's probably almost always
1249 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1252 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1255 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1256 return (val
& 0xc7) == 0x83;
1258 case R_386_TLS_DESC_CALL
:
1259 /* Check transition from GDesc access model:
1260 call *x@tlsdesc(%rax)
1262 if (offset
+ 2 <= sec
->size
)
1264 /* Make sure that it's a call *x@tlsdesc(%rax). */
1265 static const unsigned char call
[] = { 0xff, 0x10 };
1266 return memcmp (contents
+ offset
, call
, 2) == 0;
1276 /* Return TRUE if the TLS access transition is OK or no transition
1277 will be performed. Update R_TYPE if there is a transition. */
1280 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1281 asection
*sec
, bfd_byte
*contents
,
1282 Elf_Internal_Shdr
*symtab_hdr
,
1283 struct elf_link_hash_entry
**sym_hashes
,
1284 unsigned int *r_type
, int tls_type
,
1285 const Elf_Internal_Rela
*rel
,
1286 const Elf_Internal_Rela
*relend
,
1287 struct elf_link_hash_entry
*h
,
1288 unsigned long r_symndx
)
1290 unsigned int from_type
= *r_type
;
1291 unsigned int to_type
= from_type
;
1292 bfd_boolean check
= TRUE
;
1294 /* Skip TLS transition for functions. */
1296 && (h
->type
== STT_FUNC
1297 || h
->type
== STT_GNU_IFUNC
))
1303 case R_386_TLS_GOTDESC
:
1304 case R_386_TLS_DESC_CALL
:
1305 case R_386_TLS_IE_32
:
1307 case R_386_TLS_GOTIE
:
1308 if (info
->executable
)
1311 to_type
= R_386_TLS_LE_32
;
1312 else if (from_type
!= R_386_TLS_IE
1313 && from_type
!= R_386_TLS_GOTIE
)
1314 to_type
= R_386_TLS_IE_32
;
1317 /* When we are called from elf_i386_relocate_section, CONTENTS
1318 isn't NULL and there may be additional transitions based on
1320 if (contents
!= NULL
)
1322 unsigned int new_to_type
= to_type
;
1324 if (info
->executable
1327 && (tls_type
& GOT_TLS_IE
))
1328 new_to_type
= R_386_TLS_LE_32
;
1330 if (to_type
== R_386_TLS_GD
1331 || to_type
== R_386_TLS_GOTDESC
1332 || to_type
== R_386_TLS_DESC_CALL
)
1334 if (tls_type
== GOT_TLS_IE_POS
)
1335 new_to_type
= R_386_TLS_GOTIE
;
1336 else if (tls_type
& GOT_TLS_IE
)
1337 new_to_type
= R_386_TLS_IE_32
;
1340 /* We checked the transition before when we were called from
1341 elf_i386_check_relocs. We only want to check the new
1342 transition which hasn't been checked before. */
1343 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1344 to_type
= new_to_type
;
1350 if (info
->executable
)
1351 to_type
= R_386_TLS_LE_32
;
1358 /* Return TRUE if there is no transition. */
1359 if (from_type
== to_type
)
1362 /* Check if the transition can be performed. */
1364 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1365 symtab_hdr
, sym_hashes
,
1366 from_type
, rel
, relend
))
1368 reloc_howto_type
*from
, *to
;
1371 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1372 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1375 name
= h
->root
.root
.string
;
1378 struct elf_i386_link_hash_table
*htab
;
1380 htab
= elf_i386_hash_table (info
);
1385 Elf_Internal_Sym
*isym
;
1387 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1389 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1393 (*_bfd_error_handler
)
1394 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1395 "in section `%A' failed"),
1396 abfd
, sec
, from
->name
, to
->name
, name
,
1397 (unsigned long) rel
->r_offset
);
1398 bfd_set_error (bfd_error_bad_value
);
1406 /* Look through the relocs for a section during the first phase, and
1407 calculate needed space in the global offset table, procedure linkage
1408 table, and dynamic reloc sections. */
1411 elf_i386_check_relocs (bfd
*abfd
,
1412 struct bfd_link_info
*info
,
1414 const Elf_Internal_Rela
*relocs
)
1416 struct elf_i386_link_hash_table
*htab
;
1417 Elf_Internal_Shdr
*symtab_hdr
;
1418 struct elf_link_hash_entry
**sym_hashes
;
1419 const Elf_Internal_Rela
*rel
;
1420 const Elf_Internal_Rela
*rel_end
;
1423 if (info
->relocatable
)
1426 BFD_ASSERT (is_i386_elf (abfd
));
1428 htab
= elf_i386_hash_table (info
);
1432 symtab_hdr
= &elf_symtab_hdr (abfd
);
1433 sym_hashes
= elf_sym_hashes (abfd
);
1437 rel_end
= relocs
+ sec
->reloc_count
;
1438 for (rel
= relocs
; rel
< rel_end
; rel
++)
1440 unsigned int r_type
;
1441 unsigned long r_symndx
;
1442 struct elf_link_hash_entry
*h
;
1443 Elf_Internal_Sym
*isym
;
1445 bfd_boolean size_reloc
;
1447 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1448 r_type
= ELF32_R_TYPE (rel
->r_info
);
1450 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1452 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1458 if (r_symndx
< symtab_hdr
->sh_info
)
1460 /* A local symbol. */
1461 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1466 /* Check relocation against local STT_GNU_IFUNC symbol. */
1467 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1469 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1473 /* Fake a STT_GNU_IFUNC symbol. */
1474 h
->type
= STT_GNU_IFUNC
;
1477 h
->forced_local
= 1;
1478 h
->root
.type
= bfd_link_hash_defined
;
1486 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1487 while (h
->root
.type
== bfd_link_hash_indirect
1488 || h
->root
.type
== bfd_link_hash_warning
)
1489 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1494 /* Create the ifunc sections for static executables. If we
1495 never see an indirect function symbol nor we are building
1496 a static executable, those sections will be empty and
1497 won't appear in output. */
1508 if (htab
->elf
.dynobj
== NULL
)
1509 htab
->elf
.dynobj
= abfd
;
1510 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1515 /* It is referenced by a non-shared object. */
1517 h
->root
.non_ir_ref
= 1;
1520 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1521 symtab_hdr
, sym_hashes
,
1522 &r_type
, GOT_UNKNOWN
,
1523 rel
, rel_end
, h
, r_symndx
))
1529 htab
->tls_ldm_got
.refcount
+= 1;
1533 /* This symbol requires a procedure linkage table entry. We
1534 actually build the entry in adjust_dynamic_symbol,
1535 because this might be a case of linking PIC code which is
1536 never referenced by a dynamic object, in which case we
1537 don't need to generate a procedure linkage table entry
1540 /* If this is a local symbol, we resolve it directly without
1541 creating a procedure linkage table entry. */
1546 h
->plt
.refcount
+= 1;
1553 case R_386_TLS_IE_32
:
1555 case R_386_TLS_GOTIE
:
1556 if (!info
->executable
)
1557 info
->flags
|= DF_STATIC_TLS
;
1562 case R_386_TLS_GOTDESC
:
1563 case R_386_TLS_DESC_CALL
:
1564 /* This symbol requires a global offset table entry. */
1566 int tls_type
, old_tls_type
;
1571 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1572 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1573 case R_386_TLS_GOTDESC
:
1574 case R_386_TLS_DESC_CALL
:
1575 tls_type
= GOT_TLS_GDESC
; break;
1576 case R_386_TLS_IE_32
:
1577 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1578 tls_type
= GOT_TLS_IE_NEG
;
1580 /* If this is a GD->IE transition, we may use either of
1581 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1582 tls_type
= GOT_TLS_IE
;
1585 case R_386_TLS_GOTIE
:
1586 tls_type
= GOT_TLS_IE_POS
; break;
1591 h
->got
.refcount
+= 1;
1592 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1596 bfd_signed_vma
*local_got_refcounts
;
1598 /* This is a global offset table entry for a local symbol. */
1599 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1600 if (local_got_refcounts
== NULL
)
1604 size
= symtab_hdr
->sh_info
;
1605 size
*= (sizeof (bfd_signed_vma
)
1606 + sizeof (bfd_vma
) + sizeof(char));
1607 local_got_refcounts
= (bfd_signed_vma
*)
1608 bfd_zalloc (abfd
, size
);
1609 if (local_got_refcounts
== NULL
)
1611 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1612 elf_i386_local_tlsdesc_gotent (abfd
)
1613 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1614 elf_i386_local_got_tls_type (abfd
)
1615 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1617 local_got_refcounts
[r_symndx
] += 1;
1618 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1621 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1622 tls_type
|= old_tls_type
;
1623 /* If a TLS symbol is accessed using IE at least once,
1624 there is no point to use dynamic model for it. */
1625 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1626 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1627 || (tls_type
& GOT_TLS_IE
) == 0))
1629 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1630 tls_type
= old_tls_type
;
1631 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1632 && GOT_TLS_GD_ANY_P (tls_type
))
1633 tls_type
|= old_tls_type
;
1637 name
= h
->root
.root
.string
;
1639 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1641 (*_bfd_error_handler
)
1642 (_("%B: `%s' accessed both as normal and "
1643 "thread local symbol"),
1645 bfd_set_error (bfd_error_bad_value
);
1650 if (old_tls_type
!= tls_type
)
1653 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1655 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1663 if (htab
->elf
.sgot
== NULL
)
1665 if (htab
->elf
.dynobj
== NULL
)
1666 htab
->elf
.dynobj
= abfd
;
1667 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1670 if (r_type
!= R_386_TLS_IE
)
1674 case R_386_TLS_LE_32
:
1676 if (info
->executable
)
1678 info
->flags
|= DF_STATIC_TLS
;
1683 if (h
!= NULL
&& info
->executable
)
1685 /* If this reloc is in a read-only section, we might
1686 need a copy reloc. We can't check reliably at this
1687 stage whether the section is read-only, as input
1688 sections have not yet been mapped to output sections.
1689 Tentatively set the flag for now, and correct in
1690 adjust_dynamic_symbol. */
1693 /* We may need a .plt entry if the function this reloc
1694 refers to is in a shared lib. */
1695 h
->plt
.refcount
+= 1;
1696 if (r_type
!= R_386_PC32
)
1697 h
->pointer_equality_needed
= 1;
1702 /* If we are creating a shared library, and this is a reloc
1703 against a global symbol, or a non PC relative reloc
1704 against a local symbol, then we need to copy the reloc
1705 into the shared library. However, if we are linking with
1706 -Bsymbolic, we do not need to copy a reloc against a
1707 global symbol which is defined in an object we are
1708 including in the link (i.e., DEF_REGULAR is set). At
1709 this point we have not seen all the input files, so it is
1710 possible that DEF_REGULAR is not set now but will be set
1711 later (it is never cleared). In case of a weak definition,
1712 DEF_REGULAR may be cleared later by a strong definition in
1713 a shared library. We account for that possibility below by
1714 storing information in the relocs_copied field of the hash
1715 table entry. A similar situation occurs when creating
1716 shared libraries and symbol visibility changes render the
1719 If on the other hand, we are creating an executable, we
1720 may need to keep relocations for symbols satisfied by a
1721 dynamic library if we manage to avoid copy relocs for the
1724 && (sec
->flags
& SEC_ALLOC
) != 0
1725 && (r_type
!= R_386_PC32
1727 && (! SYMBOLIC_BIND (info
, h
)
1728 || h
->root
.type
== bfd_link_hash_defweak
1729 || !h
->def_regular
))))
1730 || (ELIMINATE_COPY_RELOCS
1732 && (sec
->flags
& SEC_ALLOC
) != 0
1734 && (h
->root
.type
== bfd_link_hash_defweak
1735 || !h
->def_regular
)))
1737 struct elf_dyn_relocs
*p
;
1738 struct elf_dyn_relocs
**head
;
1740 /* We must copy these reloc types into the output file.
1741 Create a reloc section in dynobj and make room for
1745 if (htab
->elf
.dynobj
== NULL
)
1746 htab
->elf
.dynobj
= abfd
;
1748 sreloc
= _bfd_elf_make_dynamic_reloc_section
1749 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1755 /* If this is a global symbol, we count the number of
1756 relocations we need for this symbol. */
1759 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1763 /* Track dynamic relocs needed for local syms too.
1764 We really need local syms available to do this
1769 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1774 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1778 vpp
= &elf_section_data (s
)->local_dynrel
;
1779 head
= (struct elf_dyn_relocs
**)vpp
;
1783 if (p
== NULL
|| p
->sec
!= sec
)
1785 bfd_size_type amt
= sizeof *p
;
1786 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1798 /* Count size relocation as PC-relative relocation. */
1799 if (r_type
== R_386_PC32
|| size_reloc
)
1804 /* This relocation describes the C++ object vtable hierarchy.
1805 Reconstruct it for later use during GC. */
1806 case R_386_GNU_VTINHERIT
:
1807 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1811 /* This relocation describes which C++ vtable entries are actually
1812 used. Record for later use during GC. */
1813 case R_386_GNU_VTENTRY
:
1814 BFD_ASSERT (h
!= NULL
);
1816 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1828 /* Return the section that should be marked against GC for a given
1832 elf_i386_gc_mark_hook (asection
*sec
,
1833 struct bfd_link_info
*info
,
1834 Elf_Internal_Rela
*rel
,
1835 struct elf_link_hash_entry
*h
,
1836 Elf_Internal_Sym
*sym
)
1839 switch (ELF32_R_TYPE (rel
->r_info
))
1841 case R_386_GNU_VTINHERIT
:
1842 case R_386_GNU_VTENTRY
:
1846 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1849 /* Update the got entry reference counts for the section being removed. */
1852 elf_i386_gc_sweep_hook (bfd
*abfd
,
1853 struct bfd_link_info
*info
,
1855 const Elf_Internal_Rela
*relocs
)
1857 struct elf_i386_link_hash_table
*htab
;
1858 Elf_Internal_Shdr
*symtab_hdr
;
1859 struct elf_link_hash_entry
**sym_hashes
;
1860 bfd_signed_vma
*local_got_refcounts
;
1861 const Elf_Internal_Rela
*rel
, *relend
;
1863 if (info
->relocatable
)
1866 htab
= elf_i386_hash_table (info
);
1870 elf_section_data (sec
)->local_dynrel
= NULL
;
1872 symtab_hdr
= &elf_symtab_hdr (abfd
);
1873 sym_hashes
= elf_sym_hashes (abfd
);
1874 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1876 relend
= relocs
+ sec
->reloc_count
;
1877 for (rel
= relocs
; rel
< relend
; rel
++)
1879 unsigned long r_symndx
;
1880 unsigned int r_type
;
1881 struct elf_link_hash_entry
*h
= NULL
;
1883 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1884 if (r_symndx
>= symtab_hdr
->sh_info
)
1886 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1887 while (h
->root
.type
== bfd_link_hash_indirect
1888 || h
->root
.type
== bfd_link_hash_warning
)
1889 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1893 /* A local symbol. */
1894 Elf_Internal_Sym
*isym
;
1896 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1899 /* Check relocation against local STT_GNU_IFUNC symbol. */
1901 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1903 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1911 struct elf_i386_link_hash_entry
*eh
;
1912 struct elf_dyn_relocs
**pp
;
1913 struct elf_dyn_relocs
*p
;
1915 eh
= (struct elf_i386_link_hash_entry
*) h
;
1916 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1919 /* Everything must go for SEC. */
1925 r_type
= ELF32_R_TYPE (rel
->r_info
);
1926 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1927 symtab_hdr
, sym_hashes
,
1928 &r_type
, GOT_UNKNOWN
,
1929 rel
, relend
, h
, r_symndx
))
1935 if (htab
->tls_ldm_got
.refcount
> 0)
1936 htab
->tls_ldm_got
.refcount
-= 1;
1940 case R_386_TLS_GOTDESC
:
1941 case R_386_TLS_DESC_CALL
:
1942 case R_386_TLS_IE_32
:
1944 case R_386_TLS_GOTIE
:
1948 if (h
->got
.refcount
> 0)
1949 h
->got
.refcount
-= 1;
1950 if (h
->type
== STT_GNU_IFUNC
)
1952 if (h
->plt
.refcount
> 0)
1953 h
->plt
.refcount
-= 1;
1956 else if (local_got_refcounts
!= NULL
)
1958 if (local_got_refcounts
[r_symndx
] > 0)
1959 local_got_refcounts
[r_symndx
] -= 1;
1967 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1974 if (h
->plt
.refcount
> 0)
1975 h
->plt
.refcount
-= 1;
1980 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
1982 if (h
->got
.refcount
> 0)
1983 h
->got
.refcount
-= 1;
1984 if (h
->plt
.refcount
> 0)
1985 h
->plt
.refcount
-= 1;
1997 /* Adjust a symbol defined by a dynamic object and referenced by a
1998 regular object. The current definition is in some section of the
1999 dynamic object, but we're not including those sections. We have to
2000 change the definition to something the rest of the link can
2004 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2005 struct elf_link_hash_entry
*h
)
2007 struct elf_i386_link_hash_table
*htab
;
2009 struct elf_i386_link_hash_entry
*eh
;
2010 struct elf_dyn_relocs
*p
;
2012 /* STT_GNU_IFUNC symbol must go through PLT. */
2013 if (h
->type
== STT_GNU_IFUNC
)
2015 /* All local STT_GNU_IFUNC references must be treate as local
2016 calls via local PLT. */
2018 && SYMBOL_CALLS_LOCAL (info
, h
))
2020 bfd_size_type pc_count
= 0, count
= 0;
2021 struct elf_dyn_relocs
**pp
;
2023 eh
= (struct elf_i386_link_hash_entry
*) h
;
2024 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2026 pc_count
+= p
->pc_count
;
2027 p
->count
-= p
->pc_count
;
2036 if (pc_count
|| count
)
2040 if (h
->plt
.refcount
<= 0)
2041 h
->plt
.refcount
= 1;
2043 h
->plt
.refcount
+= 1;
2047 if (h
->plt
.refcount
<= 0)
2049 h
->plt
.offset
= (bfd_vma
) -1;
2055 /* If this is a function, put it in the procedure linkage table. We
2056 will fill in the contents of the procedure linkage table later,
2057 when we know the address of the .got section. */
2058 if (h
->type
== STT_FUNC
2061 if (h
->plt
.refcount
<= 0
2062 || SYMBOL_CALLS_LOCAL (info
, h
)
2063 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2064 && h
->root
.type
== bfd_link_hash_undefweak
))
2066 /* This case can occur if we saw a PLT32 reloc in an input
2067 file, but the symbol was never referred to by a dynamic
2068 object, or if all references were garbage collected. In
2069 such a case, we don't actually need to build a procedure
2070 linkage table, and we can just do a PC32 reloc instead. */
2071 h
->plt
.offset
= (bfd_vma
) -1;
2078 /* It's possible that we incorrectly decided a .plt reloc was
2079 needed for an R_386_PC32 reloc to a non-function sym in
2080 check_relocs. We can't decide accurately between function and
2081 non-function syms in check-relocs; Objects loaded later in
2082 the link may change h->type. So fix it now. */
2083 h
->plt
.offset
= (bfd_vma
) -1;
2085 /* If this is a weak symbol, and there is a real definition, the
2086 processor independent code will have arranged for us to see the
2087 real definition first, and we can just use the same value. */
2088 if (h
->u
.weakdef
!= NULL
)
2090 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2091 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2092 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2093 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2094 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2095 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2099 /* This is a reference to a symbol defined by a dynamic object which
2100 is not a function. */
2102 /* If we are creating a shared library, we must presume that the
2103 only references to the symbol are via the global offset table.
2104 For such cases we need not do anything here; the relocations will
2105 be handled correctly by relocate_section. */
2109 /* If there are no references to this symbol that do not use the
2110 GOT, we don't need to generate a copy reloc. */
2111 if (!h
->non_got_ref
)
2114 /* If -z nocopyreloc was given, we won't generate them either. */
2115 if (info
->nocopyreloc
)
2121 htab
= elf_i386_hash_table (info
);
2125 /* If there aren't any dynamic relocs in read-only sections, then
2126 we can keep the dynamic relocs and avoid the copy reloc. This
2127 doesn't work on VxWorks, where we can not have dynamic relocations
2128 (other than copy and jump slot relocations) in an executable. */
2129 if (ELIMINATE_COPY_RELOCS
2130 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2132 eh
= (struct elf_i386_link_hash_entry
*) h
;
2133 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2135 s
= p
->sec
->output_section
;
2136 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2147 /* We must allocate the symbol in our .dynbss section, which will
2148 become part of the .bss section of the executable. There will be
2149 an entry for this symbol in the .dynsym section. The dynamic
2150 object will contain position independent code, so all references
2151 from the dynamic object to this symbol will go through the global
2152 offset table. The dynamic linker will use the .dynsym entry to
2153 determine the address it must put in the global offset table, so
2154 both the dynamic object and the regular object will refer to the
2155 same memory location for the variable. */
2157 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2158 copy the initial value out of the dynamic object and into the
2159 runtime process image. */
2160 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2162 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2168 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2171 /* Allocate space in .plt, .got and associated reloc sections for
2175 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2177 struct bfd_link_info
*info
;
2178 struct elf_i386_link_hash_table
*htab
;
2179 struct elf_i386_link_hash_entry
*eh
;
2180 struct elf_dyn_relocs
*p
;
2181 unsigned plt_entry_size
;
2183 if (h
->root
.type
== bfd_link_hash_indirect
)
2186 eh
= (struct elf_i386_link_hash_entry
*) h
;
2188 info
= (struct bfd_link_info
*) inf
;
2189 htab
= elf_i386_hash_table (info
);
2193 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2195 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2196 here if it is defined and referenced in a non-shared object. */
2197 if (h
->type
== STT_GNU_IFUNC
2199 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2201 else if (htab
->elf
.dynamic_sections_created
2202 && h
->plt
.refcount
> 0)
2204 /* Make sure this symbol is output as a dynamic symbol.
2205 Undefined weak syms won't yet be marked as dynamic. */
2206 if (h
->dynindx
== -1
2207 && !h
->forced_local
)
2209 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2214 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2216 asection
*s
= htab
->elf
.splt
;
2218 /* If this is the first .plt entry, make room for the special
2221 s
->size
+= plt_entry_size
;
2223 h
->plt
.offset
= s
->size
;
2225 /* If this symbol is not defined in a regular file, and we are
2226 not generating a shared library, then set the symbol to this
2227 location in the .plt. This is required to make function
2228 pointers compare as equal between the normal executable and
2229 the shared library. */
2233 h
->root
.u
.def
.section
= s
;
2234 h
->root
.u
.def
.value
= h
->plt
.offset
;
2237 /* Make room for this entry. */
2238 s
->size
+= plt_entry_size
;
2240 /* We also need to make an entry in the .got.plt section, which
2241 will be placed in the .got section by the linker script. */
2242 htab
->elf
.sgotplt
->size
+= 4;
2244 /* We also need to make an entry in the .rel.plt section. */
2245 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2246 htab
->elf
.srelplt
->reloc_count
++;
2248 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2251 /* VxWorks has a second set of relocations for each PLT entry
2252 in executables. They go in a separate relocation section,
2253 which is processed by the kernel loader. */
2255 /* There are two relocations for the initial PLT entry: an
2256 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2257 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2259 if (h
->plt
.offset
== plt_entry_size
)
2260 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2262 /* There are two extra relocations for each subsequent PLT entry:
2263 an R_386_32 relocation for the GOT entry, and an R_386_32
2264 relocation for the PLT entry. */
2266 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2271 h
->plt
.offset
= (bfd_vma
) -1;
2277 h
->plt
.offset
= (bfd_vma
) -1;
2281 eh
->tlsdesc_got
= (bfd_vma
) -1;
2283 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2284 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2285 if (h
->got
.refcount
> 0
2288 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2289 h
->got
.offset
= (bfd_vma
) -1;
2290 else if (h
->got
.refcount
> 0)
2294 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2296 /* Make sure this symbol is output as a dynamic symbol.
2297 Undefined weak syms won't yet be marked as dynamic. */
2298 if (h
->dynindx
== -1
2299 && !h
->forced_local
)
2301 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2306 if (GOT_TLS_GDESC_P (tls_type
))
2308 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2309 - elf_i386_compute_jump_table_size (htab
);
2310 htab
->elf
.sgotplt
->size
+= 8;
2311 h
->got
.offset
= (bfd_vma
) -2;
2313 if (! GOT_TLS_GDESC_P (tls_type
)
2314 || GOT_TLS_GD_P (tls_type
))
2316 h
->got
.offset
= s
->size
;
2318 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2319 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2322 dyn
= htab
->elf
.dynamic_sections_created
;
2323 /* R_386_TLS_IE_32 needs one dynamic relocation,
2324 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2325 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2326 need two), R_386_TLS_GD needs one if local symbol and two if
2328 if (tls_type
== GOT_TLS_IE_BOTH
)
2329 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2330 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2331 || (tls_type
& GOT_TLS_IE
))
2332 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2333 else if (GOT_TLS_GD_P (tls_type
))
2334 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2335 else if (! GOT_TLS_GDESC_P (tls_type
)
2336 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2337 || h
->root
.type
!= bfd_link_hash_undefweak
)
2339 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2340 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2341 if (GOT_TLS_GDESC_P (tls_type
))
2342 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2345 h
->got
.offset
= (bfd_vma
) -1;
2347 if (eh
->dyn_relocs
== NULL
)
2350 /* In the shared -Bsymbolic case, discard space allocated for
2351 dynamic pc-relative relocs against symbols which turn out to be
2352 defined in regular objects. For the normal shared case, discard
2353 space for pc-relative relocs that have become local due to symbol
2354 visibility changes. */
2358 /* The only reloc that uses pc_count is R_386_PC32, which will
2359 appear on a call or on something like ".long foo - .". We
2360 want calls to protected symbols to resolve directly to the
2361 function rather than going via the plt. If people want
2362 function pointer comparisons to work as expected then they
2363 should avoid writing assembly like ".long foo - .". */
2364 if (SYMBOL_CALLS_LOCAL (info
, h
))
2366 struct elf_dyn_relocs
**pp
;
2368 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2370 p
->count
-= p
->pc_count
;
2379 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2381 struct elf_dyn_relocs
**pp
;
2382 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2384 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2391 /* Also discard relocs on undefined weak syms with non-default
2393 if (eh
->dyn_relocs
!= NULL
2394 && h
->root
.type
== bfd_link_hash_undefweak
)
2396 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2397 eh
->dyn_relocs
= NULL
;
2399 /* Make sure undefined weak symbols are output as a dynamic
2401 else if (h
->dynindx
== -1
2402 && !h
->forced_local
)
2404 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2409 else if (ELIMINATE_COPY_RELOCS
)
2411 /* For the non-shared case, discard space for relocs against
2412 symbols which turn out to need copy relocs or are not
2418 || (htab
->elf
.dynamic_sections_created
2419 && (h
->root
.type
== bfd_link_hash_undefweak
2420 || h
->root
.type
== bfd_link_hash_undefined
))))
2422 /* Make sure this symbol is output as a dynamic symbol.
2423 Undefined weak syms won't yet be marked as dynamic. */
2424 if (h
->dynindx
== -1
2425 && !h
->forced_local
)
2427 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2431 /* If that succeeded, we know we'll be keeping all the
2433 if (h
->dynindx
!= -1)
2437 eh
->dyn_relocs
= NULL
;
2442 /* Finally, allocate space. */
2443 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2447 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2449 BFD_ASSERT (sreloc
!= NULL
);
2450 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2456 /* Allocate space in .plt, .got and associated reloc sections for
2457 local dynamic relocs. */
2460 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2462 struct elf_link_hash_entry
*h
2463 = (struct elf_link_hash_entry
*) *slot
;
2465 if (h
->type
!= STT_GNU_IFUNC
2469 || h
->root
.type
!= bfd_link_hash_defined
)
2472 return elf_i386_allocate_dynrelocs (h
, inf
);
2475 /* Find any dynamic relocs that apply to read-only sections. */
2478 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2480 struct elf_i386_link_hash_entry
*eh
;
2481 struct elf_dyn_relocs
*p
;
2483 /* Skip local IFUNC symbols. */
2484 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2487 eh
= (struct elf_i386_link_hash_entry
*) h
;
2488 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2490 asection
*s
= p
->sec
->output_section
;
2492 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2494 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2496 info
->flags
|= DF_TEXTREL
;
2498 if (info
->warn_shared_textrel
&& info
->shared
)
2499 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2500 p
->sec
->owner
, h
->root
.root
.string
,
2503 /* Not an error, just cut short the traversal. */
2511 mov foo@GOT(%reg), %reg
2513 lea foo@GOTOFF(%reg), %reg
2514 with the local symbol, foo. */
2517 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2518 struct bfd_link_info
*link_info
)
2520 Elf_Internal_Shdr
*symtab_hdr
;
2521 Elf_Internal_Rela
*internal_relocs
;
2522 Elf_Internal_Rela
*irel
, *irelend
;
2524 struct elf_i386_link_hash_table
*htab
;
2525 bfd_boolean changed_contents
;
2526 bfd_boolean changed_relocs
;
2527 bfd_signed_vma
*local_got_refcounts
;
2529 /* Don't even try to convert non-ELF outputs. */
2530 if (!is_elf_hash_table (link_info
->hash
))
2533 /* Nothing to do if there are no codes, no relocations or no output. */
2534 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2535 || sec
->reloc_count
== 0
2536 || discarded_section (sec
))
2539 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2541 /* Load the relocations for this section. */
2542 internal_relocs
= (_bfd_elf_link_read_relocs
2543 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2544 link_info
->keep_memory
));
2545 if (internal_relocs
== NULL
)
2548 htab
= elf_i386_hash_table (link_info
);
2549 changed_contents
= FALSE
;
2550 changed_relocs
= FALSE
;
2551 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2553 /* Get the section contents. */
2554 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2555 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2558 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2562 irelend
= internal_relocs
+ sec
->reloc_count
;
2563 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2565 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2566 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2568 struct elf_link_hash_entry
*h
;
2570 if (r_type
!= R_386_GOT32
)
2573 /* Get the symbol referred to by the reloc. */
2574 if (r_symndx
< symtab_hdr
->sh_info
)
2576 Elf_Internal_Sym
*isym
;
2578 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2581 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2582 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2583 && bfd_get_8 (input_bfd
,
2584 contents
+ irel
->r_offset
- 2) == 0x8b)
2586 bfd_put_8 (output_bfd
, 0x8d,
2587 contents
+ irel
->r_offset
- 2);
2588 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2589 if (local_got_refcounts
!= NULL
2590 && local_got_refcounts
[r_symndx
] > 0)
2591 local_got_refcounts
[r_symndx
] -= 1;
2592 changed_contents
= TRUE
;
2593 changed_relocs
= TRUE
;
2598 indx
= r_symndx
- symtab_hdr
->sh_info
;
2599 h
= elf_sym_hashes (abfd
)[indx
];
2600 BFD_ASSERT (h
!= NULL
);
2602 while (h
->root
.type
== bfd_link_hash_indirect
2603 || h
->root
.type
== bfd_link_hash_warning
)
2604 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2606 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2607 optimizing _DYNAMIC since ld.so may use its link-time address. */
2609 && h
->type
!= STT_GNU_IFUNC
2610 && h
!= htab
->elf
.hdynamic
2611 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2612 && bfd_get_8 (input_bfd
,
2613 contents
+ irel
->r_offset
- 2) == 0x8b)
2615 bfd_put_8 (output_bfd
, 0x8d,
2616 contents
+ irel
->r_offset
- 2);
2617 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2618 if (h
->got
.refcount
> 0)
2619 h
->got
.refcount
-= 1;
2620 changed_contents
= TRUE
;
2621 changed_relocs
= TRUE
;
2625 if (contents
!= NULL
2626 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2628 if (!changed_contents
&& !link_info
->keep_memory
)
2632 /* Cache the section contents for elf_link_input_bfd. */
2633 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2637 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2639 if (!changed_relocs
)
2640 free (internal_relocs
);
2642 elf_section_data (sec
)->relocs
= internal_relocs
;
2648 if (contents
!= NULL
2649 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2651 if (internal_relocs
!= NULL
2652 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2653 free (internal_relocs
);
2657 /* Set the sizes of the dynamic sections. */
2660 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2662 struct elf_i386_link_hash_table
*htab
;
2668 htab
= elf_i386_hash_table (info
);
2671 dynobj
= htab
->elf
.dynobj
;
2675 if (htab
->elf
.dynamic_sections_created
)
2677 /* Set the contents of the .interp section to the interpreter. */
2678 if (info
->executable
)
2680 s
= bfd_get_linker_section (dynobj
, ".interp");
2683 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2684 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2688 /* Set up .got offsets for local syms, and space for local dynamic
2690 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2692 bfd_signed_vma
*local_got
;
2693 bfd_signed_vma
*end_local_got
;
2694 char *local_tls_type
;
2695 bfd_vma
*local_tlsdesc_gotent
;
2696 bfd_size_type locsymcount
;
2697 Elf_Internal_Shdr
*symtab_hdr
;
2700 if (! is_i386_elf (ibfd
))
2703 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2705 struct elf_dyn_relocs
*p
;
2707 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2710 for (p
= ((struct elf_dyn_relocs
*)
2711 elf_section_data (s
)->local_dynrel
);
2715 if (!bfd_is_abs_section (p
->sec
)
2716 && bfd_is_abs_section (p
->sec
->output_section
))
2718 /* Input section has been discarded, either because
2719 it is a copy of a linkonce section or due to
2720 linker script /DISCARD/, so we'll be discarding
2723 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2724 && strcmp (p
->sec
->output_section
->name
,
2727 /* Relocations in vxworks .tls_vars sections are
2728 handled specially by the loader. */
2730 else if (p
->count
!= 0)
2732 srel
= elf_section_data (p
->sec
)->sreloc
;
2733 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2734 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2735 && (info
->flags
& DF_TEXTREL
) == 0)
2737 info
->flags
|= DF_TEXTREL
;
2738 if (info
->warn_shared_textrel
&& info
->shared
)
2739 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2740 p
->sec
->owner
, p
->sec
);
2746 local_got
= elf_local_got_refcounts (ibfd
);
2750 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2751 locsymcount
= symtab_hdr
->sh_info
;
2752 end_local_got
= local_got
+ locsymcount
;
2753 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2754 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2756 srel
= htab
->elf
.srelgot
;
2757 for (; local_got
< end_local_got
;
2758 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2760 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2763 if (GOT_TLS_GDESC_P (*local_tls_type
))
2765 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2766 - elf_i386_compute_jump_table_size (htab
);
2767 htab
->elf
.sgotplt
->size
+= 8;
2768 *local_got
= (bfd_vma
) -2;
2770 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2771 || GOT_TLS_GD_P (*local_tls_type
))
2773 *local_got
= s
->size
;
2775 if (GOT_TLS_GD_P (*local_tls_type
)
2776 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2780 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2781 || (*local_tls_type
& GOT_TLS_IE
))
2783 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2784 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2785 else if (GOT_TLS_GD_P (*local_tls_type
)
2786 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2787 srel
->size
+= sizeof (Elf32_External_Rel
);
2788 if (GOT_TLS_GDESC_P (*local_tls_type
))
2789 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2793 *local_got
= (bfd_vma
) -1;
2797 if (htab
->tls_ldm_got
.refcount
> 0)
2799 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2801 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2802 htab
->elf
.sgot
->size
+= 8;
2803 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2806 htab
->tls_ldm_got
.offset
= -1;
2808 /* Allocate global sym .plt and .got entries, and space for global
2809 sym dynamic relocs. */
2810 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2812 /* Allocate .plt and .got entries, and space for local symbols. */
2813 htab_traverse (htab
->loc_hash_table
,
2814 elf_i386_allocate_local_dynrelocs
,
2817 /* For every jump slot reserved in the sgotplt, reloc_count is
2818 incremented. However, when we reserve space for TLS descriptors,
2819 it's not incremented, so in order to compute the space reserved
2820 for them, it suffices to multiply the reloc count by the jump
2823 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2824 so that R_386_IRELATIVE entries come last. */
2825 if (htab
->elf
.srelplt
)
2827 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2828 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2829 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2831 else if (htab
->elf
.irelplt
)
2832 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2835 if (htab
->elf
.sgotplt
)
2837 /* Don't allocate .got.plt section if there are no GOT nor PLT
2838 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2839 if ((htab
->elf
.hgot
== NULL
2840 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2841 && (htab
->elf
.sgotplt
->size
2842 == get_elf_backend_data (output_bfd
)->got_header_size
)
2843 && (htab
->elf
.splt
== NULL
2844 || htab
->elf
.splt
->size
== 0)
2845 && (htab
->elf
.sgot
== NULL
2846 || htab
->elf
.sgot
->size
== 0)
2847 && (htab
->elf
.iplt
== NULL
2848 || htab
->elf
.iplt
->size
== 0)
2849 && (htab
->elf
.igotplt
== NULL
2850 || htab
->elf
.igotplt
->size
== 0))
2851 htab
->elf
.sgotplt
->size
= 0;
2855 if (htab
->plt_eh_frame
!= NULL
2856 && htab
->elf
.splt
!= NULL
2857 && htab
->elf
.splt
->size
!= 0
2858 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2859 && _bfd_elf_eh_frame_present (info
))
2860 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2862 /* We now have determined the sizes of the various dynamic sections.
2863 Allocate memory for them. */
2865 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2867 bfd_boolean strip_section
= TRUE
;
2869 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2872 if (s
== htab
->elf
.splt
2873 || s
== htab
->elf
.sgot
)
2875 /* Strip this section if we don't need it; see the
2877 /* We'd like to strip these sections if they aren't needed, but if
2878 we've exported dynamic symbols from them we must leave them.
2879 It's too late to tell BFD to get rid of the symbols. */
2881 if (htab
->elf
.hplt
!= NULL
)
2882 strip_section
= FALSE
;
2884 else if (s
== htab
->elf
.sgotplt
2885 || s
== htab
->elf
.iplt
2886 || s
== htab
->elf
.igotplt
2887 || s
== htab
->plt_eh_frame
2888 || s
== htab
->sdynbss
)
2890 /* Strip these too. */
2892 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2895 && s
!= htab
->elf
.srelplt
2896 && s
!= htab
->srelplt2
)
2899 /* We use the reloc_count field as a counter if we need
2900 to copy relocs into the output file. */
2905 /* It's not one of our sections, so don't allocate space. */
2911 /* If we don't need this section, strip it from the
2912 output file. This is mostly to handle .rel.bss and
2913 .rel.plt. We must create both sections in
2914 create_dynamic_sections, because they must be created
2915 before the linker maps input sections to output
2916 sections. The linker does that before
2917 adjust_dynamic_symbol is called, and it is that
2918 function which decides whether anything needs to go
2919 into these sections. */
2921 s
->flags
|= SEC_EXCLUDE
;
2925 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2928 /* Allocate memory for the section contents. We use bfd_zalloc
2929 here in case unused entries are not reclaimed before the
2930 section's contents are written out. This should not happen,
2931 but this way if it does, we get a R_386_NONE reloc instead
2933 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2934 if (s
->contents
== NULL
)
2938 if (htab
->plt_eh_frame
!= NULL
2939 && htab
->plt_eh_frame
->contents
!= NULL
)
2941 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2942 sizeof (elf_i386_eh_frame_plt
));
2943 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2944 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2947 if (htab
->elf
.dynamic_sections_created
)
2949 /* Add some entries to the .dynamic section. We fill in the
2950 values later, in elf_i386_finish_dynamic_sections, but we
2951 must add the entries now so that we get the correct size for
2952 the .dynamic section. The DT_DEBUG entry is filled in by the
2953 dynamic linker and used by the debugger. */
2954 #define add_dynamic_entry(TAG, VAL) \
2955 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2957 if (info
->executable
)
2959 if (!add_dynamic_entry (DT_DEBUG
, 0))
2963 if (htab
->elf
.splt
->size
!= 0)
2965 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2966 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2967 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2968 || !add_dynamic_entry (DT_JMPREL
, 0))
2974 if (!add_dynamic_entry (DT_REL
, 0)
2975 || !add_dynamic_entry (DT_RELSZ
, 0)
2976 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2979 /* If any dynamic relocs apply to a read-only section,
2980 then we need a DT_TEXTREL entry. */
2981 if ((info
->flags
& DF_TEXTREL
) == 0)
2982 elf_link_hash_traverse (&htab
->elf
,
2983 elf_i386_readonly_dynrelocs
, info
);
2985 if ((info
->flags
& DF_TEXTREL
) != 0)
2987 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2991 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2992 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2995 #undef add_dynamic_entry
3001 elf_i386_always_size_sections (bfd
*output_bfd
,
3002 struct bfd_link_info
*info
)
3004 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3008 struct elf_link_hash_entry
*tlsbase
;
3010 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3011 "_TLS_MODULE_BASE_",
3012 FALSE
, FALSE
, FALSE
);
3014 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3016 struct elf_i386_link_hash_table
*htab
;
3017 struct bfd_link_hash_entry
*bh
= NULL
;
3018 const struct elf_backend_data
*bed
3019 = get_elf_backend_data (output_bfd
);
3021 htab
= elf_i386_hash_table (info
);
3025 if (!(_bfd_generic_link_add_one_symbol
3026 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3027 tls_sec
, 0, NULL
, FALSE
,
3028 bed
->collect
, &bh
)))
3031 htab
->tls_module_base
= bh
;
3033 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3034 tlsbase
->def_regular
= 1;
3035 tlsbase
->other
= STV_HIDDEN
;
3036 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3043 /* Set the correct type for an x86 ELF section. We do this by the
3044 section name, which is a hack, but ought to work. */
3047 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3048 Elf_Internal_Shdr
*hdr
,
3053 name
= bfd_get_section_name (abfd
, sec
);
3055 /* This is an ugly, but unfortunately necessary hack that is
3056 needed when producing EFI binaries on x86. It tells
3057 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3058 containing ELF relocation info. We need this hack in order to
3059 be able to generate ELF binaries that can be translated into
3060 EFI applications (which are essentially COFF objects). Those
3061 files contain a COFF ".reloc" section inside an ELFNN object,
3062 which would normally cause BFD to segfault because it would
3063 attempt to interpret this section as containing relocation
3064 entries for section "oc". With this hack enabled, ".reloc"
3065 will be treated as a normal data section, which will avoid the
3066 segfault. However, you won't be able to create an ELFNN binary
3067 with a section named "oc" that needs relocations, but that's
3068 the kind of ugly side-effects you get when detecting section
3069 types based on their names... In practice, this limitation is
3070 unlikely to bite. */
3071 if (strcmp (name
, ".reloc") == 0)
3072 hdr
->sh_type
= SHT_PROGBITS
;
3077 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3078 executables. Rather than setting it to the beginning of the TLS
3079 section, we have to set it to the end. This function may be called
3080 multiple times, it is idempotent. */
3083 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3085 struct elf_i386_link_hash_table
*htab
;
3086 struct bfd_link_hash_entry
*base
;
3088 if (!info
->executable
)
3091 htab
= elf_i386_hash_table (info
);
3095 base
= htab
->tls_module_base
;
3099 base
->u
.def
.value
= htab
->elf
.tls_size
;
3102 /* Return the base VMA address which should be subtracted from real addresses
3103 when resolving @dtpoff relocation.
3104 This is PT_TLS segment p_vaddr. */
3107 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3109 /* If tls_sec is NULL, we should have signalled an error already. */
3110 if (elf_hash_table (info
)->tls_sec
== NULL
)
3112 return elf_hash_table (info
)->tls_sec
->vma
;
3115 /* Return the relocation value for @tpoff relocation
3116 if STT_TLS virtual address is ADDRESS. */
3119 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3121 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3122 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3123 bfd_vma static_tls_size
;
3125 /* If tls_sec is NULL, we should have signalled an error already. */
3126 if (htab
->tls_sec
== NULL
)
3129 /* Consider special static TLS alignment requirements. */
3130 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3131 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3134 /* Relocate an i386 ELF section. */
3137 elf_i386_relocate_section (bfd
*output_bfd
,
3138 struct bfd_link_info
*info
,
3140 asection
*input_section
,
3142 Elf_Internal_Rela
*relocs
,
3143 Elf_Internal_Sym
*local_syms
,
3144 asection
**local_sections
)
3146 struct elf_i386_link_hash_table
*htab
;
3147 Elf_Internal_Shdr
*symtab_hdr
;
3148 struct elf_link_hash_entry
**sym_hashes
;
3149 bfd_vma
*local_got_offsets
;
3150 bfd_vma
*local_tlsdesc_gotents
;
3151 Elf_Internal_Rela
*rel
;
3152 Elf_Internal_Rela
*relend
;
3153 bfd_boolean is_vxworks_tls
;
3154 unsigned plt_entry_size
;
3156 BFD_ASSERT (is_i386_elf (input_bfd
));
3158 htab
= elf_i386_hash_table (info
);
3161 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3162 sym_hashes
= elf_sym_hashes (input_bfd
);
3163 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3164 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3165 /* We have to handle relocations in vxworks .tls_vars sections
3166 specially, because the dynamic loader is 'weird'. */
3167 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3169 && !strcmp (input_section
->output_section
->name
,
3172 elf_i386_set_tls_module_base (info
);
3174 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3177 relend
= relocs
+ input_section
->reloc_count
;
3178 for (; rel
< relend
; rel
++)
3180 unsigned int r_type
;
3181 reloc_howto_type
*howto
;
3182 unsigned long r_symndx
;
3183 struct elf_link_hash_entry
*h
;
3184 Elf_Internal_Sym
*sym
;
3186 bfd_vma off
, offplt
;
3188 bfd_boolean unresolved_reloc
;
3189 bfd_reloc_status_type r
;
3194 r_type
= ELF32_R_TYPE (rel
->r_info
);
3195 if (r_type
== R_386_GNU_VTINHERIT
3196 || r_type
== R_386_GNU_VTENTRY
)
3199 if ((indx
= r_type
) >= R_386_standard
3200 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3201 >= R_386_ext
- R_386_standard
)
3202 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3203 >= R_386_irelative
- R_386_ext
))
3205 (*_bfd_error_handler
)
3206 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3207 input_bfd
, input_section
, r_type
);
3208 bfd_set_error (bfd_error_bad_value
);
3211 howto
= elf_howto_table
+ indx
;
3213 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3217 unresolved_reloc
= FALSE
;
3218 if (r_symndx
< symtab_hdr
->sh_info
)
3220 sym
= local_syms
+ r_symndx
;
3221 sec
= local_sections
[r_symndx
];
3222 relocation
= (sec
->output_section
->vma
3223 + sec
->output_offset
3225 st_size
= sym
->st_size
;
3227 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3228 && ((sec
->flags
& SEC_MERGE
) != 0
3229 || (info
->relocatable
3230 && sec
->output_offset
!= 0)))
3233 bfd_byte
*where
= contents
+ rel
->r_offset
;
3235 switch (howto
->size
)
3238 addend
= bfd_get_8 (input_bfd
, where
);
3239 if (howto
->pc_relative
)
3241 addend
= (addend
^ 0x80) - 0x80;
3246 addend
= bfd_get_16 (input_bfd
, where
);
3247 if (howto
->pc_relative
)
3249 addend
= (addend
^ 0x8000) - 0x8000;
3254 addend
= bfd_get_32 (input_bfd
, where
);
3255 if (howto
->pc_relative
)
3257 addend
= (addend
^ 0x80000000) - 0x80000000;
3265 if (info
->relocatable
)
3266 addend
+= sec
->output_offset
;
3269 asection
*msec
= sec
;
3270 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3272 addend
-= relocation
;
3273 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3276 switch (howto
->size
)
3279 /* FIXME: overflow checks. */
3280 if (howto
->pc_relative
)
3282 bfd_put_8 (input_bfd
, addend
, where
);
3285 if (howto
->pc_relative
)
3287 bfd_put_16 (input_bfd
, addend
, where
);
3290 if (howto
->pc_relative
)
3292 bfd_put_32 (input_bfd
, addend
, where
);
3296 else if (!info
->relocatable
3297 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3299 /* Relocate against local STT_GNU_IFUNC symbol. */
3300 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3305 /* Set STT_GNU_IFUNC symbol value. */
3306 h
->root
.u
.def
.value
= sym
->st_value
;
3307 h
->root
.u
.def
.section
= sec
;
3312 bfd_boolean warned ATTRIBUTE_UNUSED
;
3314 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3315 r_symndx
, symtab_hdr
, sym_hashes
,
3317 unresolved_reloc
, warned
);
3321 if (sec
!= NULL
&& discarded_section (sec
))
3322 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3323 rel
, 1, relend
, howto
, 0, contents
);
3325 if (info
->relocatable
)
3328 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3329 it here if it is defined in a non-shared object. */
3331 && h
->type
== STT_GNU_IFUNC
3334 asection
*plt
, *gotplt
, *base_got
;
3338 if ((input_section
->flags
& SEC_ALLOC
) == 0
3339 || h
->plt
.offset
== (bfd_vma
) -1)
3342 /* STT_GNU_IFUNC symbol must go through PLT. */
3343 if (htab
->elf
.splt
!= NULL
)
3345 plt
= htab
->elf
.splt
;
3346 gotplt
= htab
->elf
.sgotplt
;
3350 plt
= htab
->elf
.iplt
;
3351 gotplt
= htab
->elf
.igotplt
;
3354 relocation
= (plt
->output_section
->vma
3355 + plt
->output_offset
+ h
->plt
.offset
);
3360 if (h
->root
.root
.string
)
3361 name
= h
->root
.root
.string
;
3363 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3365 (*_bfd_error_handler
)
3366 (_("%B: relocation %s against STT_GNU_IFUNC "
3367 "symbol `%s' isn't handled by %s"), input_bfd
,
3368 elf_howto_table
[r_type
].name
,
3369 name
, __FUNCTION__
);
3370 bfd_set_error (bfd_error_bad_value
);
3374 /* Generate dynamic relcoation only when there is a
3375 non-GOT reference in a shared object. */
3376 if (info
->shared
&& h
->non_got_ref
)
3378 Elf_Internal_Rela outrel
;
3382 /* Need a dynamic relocation to get the real function
3384 offset
= _bfd_elf_section_offset (output_bfd
,
3388 if (offset
== (bfd_vma
) -1
3389 || offset
== (bfd_vma
) -2)
3392 outrel
.r_offset
= (input_section
->output_section
->vma
3393 + input_section
->output_offset
3396 if (h
->dynindx
== -1
3398 || info
->executable
)
3400 /* This symbol is resolved locally. */
3401 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3402 bfd_put_32 (output_bfd
,
3403 (h
->root
.u
.def
.value
3404 + h
->root
.u
.def
.section
->output_section
->vma
3405 + h
->root
.u
.def
.section
->output_offset
),
3409 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3411 sreloc
= htab
->elf
.irelifunc
;
3412 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3414 /* If this reloc is against an external symbol, we
3415 do not want to fiddle with the addend. Otherwise,
3416 we need to include the symbol value so that it
3417 becomes an addend for the dynamic reloc. For an
3418 internal symbol, we have updated addend. */
3427 base_got
= htab
->elf
.sgot
;
3428 off
= h
->got
.offset
;
3430 if (base_got
== NULL
)
3433 if (off
== (bfd_vma
) -1)
3435 /* We can't use h->got.offset here to save state, or
3436 even just remember the offset, as finish_dynamic_symbol
3437 would use that as offset into .got. */
3439 if (htab
->elf
.splt
!= NULL
)
3441 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3442 off
= (plt_index
+ 3) * 4;
3443 base_got
= htab
->elf
.sgotplt
;
3447 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3448 off
= plt_index
* 4;
3449 base_got
= htab
->elf
.igotplt
;
3452 if (h
->dynindx
== -1
3456 /* This references the local defitionion. We must
3457 initialize this entry in the global offset table.
3458 Since the offset must always be a multiple of 8,
3459 we use the least significant bit to record
3460 whether we have initialized it already.
3462 When doing a dynamic link, we create a .rela.got
3463 relocation entry to initialize the value. This
3464 is done in the finish_dynamic_symbol routine. */
3469 bfd_put_32 (output_bfd
, relocation
,
3470 base_got
->contents
+ off
);
3477 /* Adjust for static executables. */
3478 if (htab
->elf
.splt
== NULL
)
3479 relocation
+= gotplt
->output_offset
;
3483 relocation
= (base_got
->output_section
->vma
3484 + base_got
->output_offset
+ off
3485 - gotplt
->output_section
->vma
3486 - gotplt
->output_offset
);
3487 /* Adjust for static executables. */
3488 if (htab
->elf
.splt
== NULL
)
3489 relocation
+= gotplt
->output_offset
;
3495 relocation
-= (gotplt
->output_section
->vma
3496 + gotplt
->output_offset
);
3504 /* Relocation is to the entry for this symbol in the global
3506 if (htab
->elf
.sgot
== NULL
)
3513 off
= h
->got
.offset
;
3514 dyn
= htab
->elf
.dynamic_sections_created
;
3515 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3517 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3518 || (ELF_ST_VISIBILITY (h
->other
)
3519 && h
->root
.type
== bfd_link_hash_undefweak
))
3521 /* This is actually a static link, or it is a
3522 -Bsymbolic link and the symbol is defined
3523 locally, or the symbol was forced to be local
3524 because of a version file. We must initialize
3525 this entry in the global offset table. Since the
3526 offset must always be a multiple of 4, we use the
3527 least significant bit to record whether we have
3528 initialized it already.
3530 When doing a dynamic link, we create a .rel.got
3531 relocation entry to initialize the value. This
3532 is done in the finish_dynamic_symbol routine. */
3537 bfd_put_32 (output_bfd
, relocation
,
3538 htab
->elf
.sgot
->contents
+ off
);
3543 unresolved_reloc
= FALSE
;
3547 if (local_got_offsets
== NULL
)
3550 off
= local_got_offsets
[r_symndx
];
3552 /* The offset must always be a multiple of 4. We use
3553 the least significant bit to record whether we have
3554 already generated the necessary reloc. */
3559 bfd_put_32 (output_bfd
, relocation
,
3560 htab
->elf
.sgot
->contents
+ off
);
3565 Elf_Internal_Rela outrel
;
3567 s
= htab
->elf
.srelgot
;
3571 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3572 + htab
->elf
.sgot
->output_offset
3574 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3575 elf_append_rel (output_bfd
, s
, &outrel
);
3578 local_got_offsets
[r_symndx
] |= 1;
3582 if (off
>= (bfd_vma
) -2)
3585 relocation
= htab
->elf
.sgot
->output_section
->vma
3586 + htab
->elf
.sgot
->output_offset
+ off
3587 - htab
->elf
.sgotplt
->output_section
->vma
3588 - htab
->elf
.sgotplt
->output_offset
;
3592 /* Relocation is relative to the start of the global offset
3595 /* Check to make sure it isn't a protected function symbol
3596 for shared library since it may not be local when used
3597 as function address. We also need to make sure that a
3598 symbol is defined locally. */
3599 if (info
->shared
&& h
)
3601 if (!h
->def_regular
)
3605 switch (ELF_ST_VISIBILITY (h
->other
))
3608 v
= _("hidden symbol");
3611 v
= _("internal symbol");
3614 v
= _("protected symbol");
3621 (*_bfd_error_handler
)
3622 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3623 input_bfd
, v
, h
->root
.root
.string
);
3624 bfd_set_error (bfd_error_bad_value
);
3627 else if (!info
->executable
3628 && !SYMBOLIC_BIND (info
, h
)
3629 && h
->type
== STT_FUNC
3630 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3632 (*_bfd_error_handler
)
3633 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3634 input_bfd
, h
->root
.root
.string
);
3635 bfd_set_error (bfd_error_bad_value
);
3640 /* Note that sgot is not involved in this
3641 calculation. We always want the start of .got.plt. If we
3642 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3643 permitted by the ABI, we might have to change this
3645 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3646 + htab
->elf
.sgotplt
->output_offset
;
3650 /* Use global offset table as symbol value. */
3651 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3652 + htab
->elf
.sgotplt
->output_offset
;
3653 unresolved_reloc
= FALSE
;
3657 /* Relocation is to the entry for this symbol in the
3658 procedure linkage table. */
3660 /* Resolve a PLT32 reloc against a local symbol directly,
3661 without using the procedure linkage table. */
3665 if (h
->plt
.offset
== (bfd_vma
) -1
3666 || htab
->elf
.splt
== NULL
)
3668 /* We didn't make a PLT entry for this symbol. This
3669 happens when statically linking PIC code, or when
3670 using -Bsymbolic. */
3674 relocation
= (htab
->elf
.splt
->output_section
->vma
3675 + htab
->elf
.splt
->output_offset
3677 unresolved_reloc
= FALSE
;
3681 /* Set to symbol size. */
3682 relocation
= st_size
;
3687 if ((input_section
->flags
& SEC_ALLOC
) == 0
3693 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3694 || h
->root
.type
!= bfd_link_hash_undefweak
)
3695 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3696 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3697 || (ELIMINATE_COPY_RELOCS
3704 || h
->root
.type
== bfd_link_hash_undefweak
3705 || h
->root
.type
== bfd_link_hash_undefined
)))
3707 Elf_Internal_Rela outrel
;
3708 bfd_boolean skip
, relocate
;
3711 /* When generating a shared object, these relocations
3712 are copied into the output file to be resolved at run
3719 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3721 if (outrel
.r_offset
== (bfd_vma
) -1)
3723 else if (outrel
.r_offset
== (bfd_vma
) -2)
3724 skip
= TRUE
, relocate
= TRUE
;
3725 outrel
.r_offset
+= (input_section
->output_section
->vma
3726 + input_section
->output_offset
);
3729 memset (&outrel
, 0, sizeof outrel
);
3732 && (r_type
== R_386_PC32
3734 || !SYMBOLIC_BIND (info
, h
)
3735 || !h
->def_regular
))
3736 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3739 /* This symbol is local, or marked to become local. */
3741 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3744 sreloc
= elf_section_data (input_section
)->sreloc
;
3746 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3748 r
= bfd_reloc_notsupported
;
3749 goto check_relocation_error
;
3752 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3754 /* If this reloc is against an external symbol, we do
3755 not want to fiddle with the addend. Otherwise, we
3756 need to include the symbol value so that it becomes
3757 an addend for the dynamic reloc. */
3764 if (!info
->executable
)
3766 Elf_Internal_Rela outrel
;
3769 outrel
.r_offset
= rel
->r_offset
3770 + input_section
->output_section
->vma
3771 + input_section
->output_offset
;
3772 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3773 sreloc
= elf_section_data (input_section
)->sreloc
;
3776 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3781 case R_386_TLS_GOTDESC
:
3782 case R_386_TLS_DESC_CALL
:
3783 case R_386_TLS_IE_32
:
3784 case R_386_TLS_GOTIE
:
3785 tls_type
= GOT_UNKNOWN
;
3786 if (h
== NULL
&& local_got_offsets
)
3787 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3789 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3790 if (tls_type
== GOT_TLS_IE
)
3791 tls_type
= GOT_TLS_IE_NEG
;
3793 if (! elf_i386_tls_transition (info
, input_bfd
,
3794 input_section
, contents
,
3795 symtab_hdr
, sym_hashes
,
3796 &r_type
, tls_type
, rel
,
3797 relend
, h
, r_symndx
))
3800 if (r_type
== R_386_TLS_LE_32
)
3802 BFD_ASSERT (! unresolved_reloc
);
3803 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3808 /* GD->LE transition. */
3809 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3812 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3814 movl %gs:0, %eax; subl $foo@tpoff, %eax
3815 (6 byte form of subl). */
3816 memcpy (contents
+ rel
->r_offset
- 3,
3817 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3818 roff
= rel
->r_offset
+ 5;
3822 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3824 movl %gs:0, %eax; subl $foo@tpoff, %eax
3825 (6 byte form of subl). */
3826 memcpy (contents
+ rel
->r_offset
- 2,
3827 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3828 roff
= rel
->r_offset
+ 6;
3830 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3832 /* Skip R_386_PC32/R_386_PLT32. */
3836 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3838 /* GDesc -> LE transition.
3839 It's originally something like:
3840 leal x@tlsdesc(%ebx), %eax
3844 Registers other than %eax may be set up here. */
3849 roff
= rel
->r_offset
;
3850 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3852 /* Now modify the instruction as appropriate. */
3853 /* aoliva FIXME: remove the above and xor the byte
3855 bfd_put_8 (output_bfd
, val
^ 0x86,
3856 contents
+ roff
- 1);
3857 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3861 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3863 /* GDesc -> LE transition.
3871 roff
= rel
->r_offset
;
3872 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3873 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3876 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3880 /* IE->LE transition:
3881 Originally it can be one of:
3889 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3892 /* movl foo, %eax. */
3893 bfd_put_8 (output_bfd
, 0xb8,
3894 contents
+ rel
->r_offset
- 1);
3900 type
= bfd_get_8 (input_bfd
,
3901 contents
+ rel
->r_offset
- 2);
3906 bfd_put_8 (output_bfd
, 0xc7,
3907 contents
+ rel
->r_offset
- 2);
3908 bfd_put_8 (output_bfd
,
3909 0xc0 | ((val
>> 3) & 7),
3910 contents
+ rel
->r_offset
- 1);
3914 bfd_put_8 (output_bfd
, 0x81,
3915 contents
+ rel
->r_offset
- 2);
3916 bfd_put_8 (output_bfd
,
3917 0xc0 | ((val
>> 3) & 7),
3918 contents
+ rel
->r_offset
- 1);
3925 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3926 contents
+ rel
->r_offset
);
3931 unsigned int val
, type
;
3933 /* {IE_32,GOTIE}->LE transition:
3934 Originally it can be one of:
3935 subl foo(%reg1), %reg2
3936 movl foo(%reg1), %reg2
3937 addl foo(%reg1), %reg2
3940 movl $foo, %reg2 (6 byte form)
3941 addl $foo, %reg2. */
3942 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3943 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3947 bfd_put_8 (output_bfd
, 0xc7,
3948 contents
+ rel
->r_offset
- 2);
3949 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3950 contents
+ rel
->r_offset
- 1);
3952 else if (type
== 0x2b)
3955 bfd_put_8 (output_bfd
, 0x81,
3956 contents
+ rel
->r_offset
- 2);
3957 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3958 contents
+ rel
->r_offset
- 1);
3960 else if (type
== 0x03)
3963 bfd_put_8 (output_bfd
, 0x81,
3964 contents
+ rel
->r_offset
- 2);
3965 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3966 contents
+ rel
->r_offset
- 1);
3970 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3971 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3972 contents
+ rel
->r_offset
);
3974 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3975 contents
+ rel
->r_offset
);
3980 if (htab
->elf
.sgot
== NULL
)
3985 off
= h
->got
.offset
;
3986 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3990 if (local_got_offsets
== NULL
)
3993 off
= local_got_offsets
[r_symndx
];
3994 offplt
= local_tlsdesc_gotents
[r_symndx
];
4001 Elf_Internal_Rela outrel
;
4005 if (htab
->elf
.srelgot
== NULL
)
4008 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4010 if (GOT_TLS_GDESC_P (tls_type
))
4013 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4014 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4015 <= htab
->elf
.sgotplt
->size
);
4016 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4017 + htab
->elf
.sgotplt
->output_offset
4019 + htab
->sgotplt_jump_table_size
);
4020 sreloc
= htab
->elf
.srelplt
;
4021 loc
= sreloc
->contents
;
4022 loc
+= (htab
->next_tls_desc_index
++
4023 * sizeof (Elf32_External_Rel
));
4024 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4025 <= sreloc
->contents
+ sreloc
->size
);
4026 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4029 BFD_ASSERT (! unresolved_reloc
);
4030 bfd_put_32 (output_bfd
,
4031 relocation
- elf_i386_dtpoff_base (info
),
4032 htab
->elf
.sgotplt
->contents
+ offplt
4033 + htab
->sgotplt_jump_table_size
+ 4);
4037 bfd_put_32 (output_bfd
, 0,
4038 htab
->elf
.sgotplt
->contents
+ offplt
4039 + htab
->sgotplt_jump_table_size
+ 4);
4043 sreloc
= htab
->elf
.srelgot
;
4045 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4046 + htab
->elf
.sgot
->output_offset
+ off
);
4048 if (GOT_TLS_GD_P (tls_type
))
4049 dr_type
= R_386_TLS_DTPMOD32
;
4050 else if (GOT_TLS_GDESC_P (tls_type
))
4052 else if (tls_type
== GOT_TLS_IE_POS
)
4053 dr_type
= R_386_TLS_TPOFF
;
4055 dr_type
= R_386_TLS_TPOFF32
;
4057 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4058 bfd_put_32 (output_bfd
,
4059 relocation
- elf_i386_dtpoff_base (info
),
4060 htab
->elf
.sgot
->contents
+ off
);
4061 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4062 bfd_put_32 (output_bfd
,
4063 elf_i386_dtpoff_base (info
) - relocation
,
4064 htab
->elf
.sgot
->contents
+ off
);
4065 else if (dr_type
!= R_386_TLS_DESC
)
4066 bfd_put_32 (output_bfd
, 0,
4067 htab
->elf
.sgot
->contents
+ off
);
4068 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4070 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4072 if (GOT_TLS_GD_P (tls_type
))
4076 BFD_ASSERT (! unresolved_reloc
);
4077 bfd_put_32 (output_bfd
,
4078 relocation
- elf_i386_dtpoff_base (info
),
4079 htab
->elf
.sgot
->contents
+ off
+ 4);
4083 bfd_put_32 (output_bfd
, 0,
4084 htab
->elf
.sgot
->contents
+ off
+ 4);
4085 outrel
.r_info
= ELF32_R_INFO (indx
,
4086 R_386_TLS_DTPOFF32
);
4087 outrel
.r_offset
+= 4;
4088 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4091 else if (tls_type
== GOT_TLS_IE_BOTH
)
4093 bfd_put_32 (output_bfd
,
4095 ? relocation
- elf_i386_dtpoff_base (info
)
4097 htab
->elf
.sgot
->contents
+ off
+ 4);
4098 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4099 outrel
.r_offset
+= 4;
4100 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4107 local_got_offsets
[r_symndx
] |= 1;
4110 if (off
>= (bfd_vma
) -2
4111 && ! GOT_TLS_GDESC_P (tls_type
))
4113 if (r_type
== R_386_TLS_GOTDESC
4114 || r_type
== R_386_TLS_DESC_CALL
)
4116 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4117 unresolved_reloc
= FALSE
;
4119 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4121 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4122 + htab
->elf
.sgotplt
->output_offset
;
4123 relocation
= htab
->elf
.sgot
->output_section
->vma
4124 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4125 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4126 && tls_type
== GOT_TLS_IE_BOTH
)
4128 if (r_type
== R_386_TLS_IE
)
4129 relocation
+= g_o_t
;
4130 unresolved_reloc
= FALSE
;
4132 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4134 unsigned int val
, type
;
4137 /* GD->IE transition. */
4138 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4139 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4142 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4144 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4146 roff
= rel
->r_offset
- 3;
4150 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4152 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4153 roff
= rel
->r_offset
- 2;
4155 memcpy (contents
+ roff
,
4156 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4157 contents
[roff
+ 7] = 0x80 | (val
& 7);
4158 /* If foo is used only with foo@gotntpoff(%reg) and
4159 foo@indntpoff, but not with foo@gottpoff(%reg), change
4160 subl $foo@gottpoff(%reg), %eax
4162 addl $foo@gotntpoff(%reg), %eax. */
4163 if (tls_type
== GOT_TLS_IE_POS
)
4164 contents
[roff
+ 6] = 0x03;
4165 bfd_put_32 (output_bfd
,
4166 htab
->elf
.sgot
->output_section
->vma
4167 + htab
->elf
.sgot
->output_offset
+ off
4168 - htab
->elf
.sgotplt
->output_section
->vma
4169 - htab
->elf
.sgotplt
->output_offset
,
4170 contents
+ roff
+ 8);
4171 /* Skip R_386_PLT32. */
4175 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4177 /* GDesc -> IE transition.
4178 It's originally something like:
4179 leal x@tlsdesc(%ebx), %eax
4182 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4184 movl x@gottpoff(%ebx), %eax # before negl %eax
4186 Registers other than %eax may be set up here. */
4190 /* First, make sure it's a leal adding ebx to a 32-bit
4191 offset into any register, although it's probably
4192 almost always going to be eax. */
4193 roff
= rel
->r_offset
;
4195 /* Now modify the instruction as appropriate. */
4196 /* To turn a leal into a movl in the form we use it, it
4197 suffices to change the first byte from 0x8d to 0x8b.
4198 aoliva FIXME: should we decide to keep the leal, all
4199 we have to do is remove the statement below, and
4200 adjust the relaxation of R_386_TLS_DESC_CALL. */
4201 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4203 if (tls_type
== GOT_TLS_IE_BOTH
)
4206 bfd_put_32 (output_bfd
,
4207 htab
->elf
.sgot
->output_section
->vma
4208 + htab
->elf
.sgot
->output_offset
+ off
4209 - htab
->elf
.sgotplt
->output_section
->vma
4210 - htab
->elf
.sgotplt
->output_offset
,
4214 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4216 /* GDesc -> IE transition.
4224 depending on how we transformed the TLS_GOTDESC above.
4229 roff
= rel
->r_offset
;
4231 /* Now modify the instruction as appropriate. */
4232 if (tls_type
!= GOT_TLS_IE_NEG
)
4235 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4236 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4241 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4242 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4252 if (! elf_i386_tls_transition (info
, input_bfd
,
4253 input_section
, contents
,
4254 symtab_hdr
, sym_hashes
,
4255 &r_type
, GOT_UNKNOWN
, rel
,
4256 relend
, h
, r_symndx
))
4259 if (r_type
!= R_386_TLS_LDM
)
4261 /* LD->LE transition:
4262 leal foo(%reg), %eax; call ___tls_get_addr.
4264 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4265 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4266 memcpy (contents
+ rel
->r_offset
- 2,
4267 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4268 /* Skip R_386_PC32/R_386_PLT32. */
4273 if (htab
->elf
.sgot
== NULL
)
4276 off
= htab
->tls_ldm_got
.offset
;
4281 Elf_Internal_Rela outrel
;
4283 if (htab
->elf
.srelgot
== NULL
)
4286 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4287 + htab
->elf
.sgot
->output_offset
+ off
);
4289 bfd_put_32 (output_bfd
, 0,
4290 htab
->elf
.sgot
->contents
+ off
);
4291 bfd_put_32 (output_bfd
, 0,
4292 htab
->elf
.sgot
->contents
+ off
+ 4);
4293 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4294 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4295 htab
->tls_ldm_got
.offset
|= 1;
4297 relocation
= htab
->elf
.sgot
->output_section
->vma
4298 + htab
->elf
.sgot
->output_offset
+ off
4299 - htab
->elf
.sgotplt
->output_section
->vma
4300 - htab
->elf
.sgotplt
->output_offset
;
4301 unresolved_reloc
= FALSE
;
4304 case R_386_TLS_LDO_32
:
4305 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4306 relocation
-= elf_i386_dtpoff_base (info
);
4308 /* When converting LDO to LE, we must negate. */
4309 relocation
= -elf_i386_tpoff (info
, relocation
);
4312 case R_386_TLS_LE_32
:
4314 if (!info
->executable
)
4316 Elf_Internal_Rela outrel
;
4319 outrel
.r_offset
= rel
->r_offset
4320 + input_section
->output_section
->vma
4321 + input_section
->output_offset
;
4322 if (h
!= NULL
&& h
->dynindx
!= -1)
4326 if (r_type
== R_386_TLS_LE_32
)
4327 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4329 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4330 sreloc
= elf_section_data (input_section
)->sreloc
;
4333 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4336 else if (r_type
== R_386_TLS_LE_32
)
4337 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4339 relocation
-= elf_i386_dtpoff_base (info
);
4341 else if (r_type
== R_386_TLS_LE_32
)
4342 relocation
= elf_i386_tpoff (info
, relocation
);
4344 relocation
= -elf_i386_tpoff (info
, relocation
);
4351 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4352 because such sections are not SEC_ALLOC and thus ld.so will
4353 not process them. */
4354 if (unresolved_reloc
4355 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4357 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4358 rel
->r_offset
) != (bfd_vma
) -1)
4360 (*_bfd_error_handler
)
4361 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4364 (long) rel
->r_offset
,
4366 h
->root
.root
.string
);
4371 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4372 contents
, rel
->r_offset
,
4375 check_relocation_error
:
4376 if (r
!= bfd_reloc_ok
)
4381 name
= h
->root
.root
.string
;
4384 name
= bfd_elf_string_from_elf_section (input_bfd
,
4385 symtab_hdr
->sh_link
,
4390 name
= bfd_section_name (input_bfd
, sec
);
4393 if (r
== bfd_reloc_overflow
)
4395 if (! ((*info
->callbacks
->reloc_overflow
)
4396 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4397 (bfd_vma
) 0, input_bfd
, input_section
,
4403 (*_bfd_error_handler
)
4404 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4405 input_bfd
, input_section
,
4406 (long) rel
->r_offset
, name
, (int) r
);
4415 /* Finish up dynamic symbol handling. We set the contents of various
4416 dynamic sections here. */
4419 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4420 struct bfd_link_info
*info
,
4421 struct elf_link_hash_entry
*h
,
4422 Elf_Internal_Sym
*sym
)
4424 struct elf_i386_link_hash_table
*htab
;
4425 unsigned plt_entry_size
;
4426 const struct elf_i386_backend_data
*abed
;
4428 htab
= elf_i386_hash_table (info
);
4432 abed
= get_elf_i386_backend_data (output_bfd
);
4433 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4435 if (h
->plt
.offset
!= (bfd_vma
) -1)
4439 Elf_Internal_Rela rel
;
4441 asection
*plt
, *gotplt
, *relplt
;
4443 /* When building a static executable, use .iplt, .igot.plt and
4444 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4445 if (htab
->elf
.splt
!= NULL
)
4447 plt
= htab
->elf
.splt
;
4448 gotplt
= htab
->elf
.sgotplt
;
4449 relplt
= htab
->elf
.srelplt
;
4453 plt
= htab
->elf
.iplt
;
4454 gotplt
= htab
->elf
.igotplt
;
4455 relplt
= htab
->elf
.irelplt
;
4458 /* This symbol has an entry in the procedure linkage table. Set
4461 if ((h
->dynindx
== -1
4462 && !((h
->forced_local
|| info
->executable
)
4464 && h
->type
== STT_GNU_IFUNC
))
4470 /* Get the index in the procedure linkage table which
4471 corresponds to this symbol. This is the index of this symbol
4472 in all the symbols for which we are making plt entries. The
4473 first entry in the procedure linkage table is reserved.
4475 Get the offset into the .got table of the entry that
4476 corresponds to this function. Each .got entry is 4 bytes.
4477 The first three are reserved.
4479 For static executables, we don't reserve anything. */
4481 if (plt
== htab
->elf
.splt
)
4483 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4484 got_offset
= (got_offset
+ 3) * 4;
4488 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4489 got_offset
= got_offset
* 4;
4492 /* Fill in the entry in the procedure linkage table. */
4495 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4496 abed
->plt
->plt_entry_size
);
4497 bfd_put_32 (output_bfd
,
4498 (gotplt
->output_section
->vma
4499 + gotplt
->output_offset
4501 plt
->contents
+ h
->plt
.offset
4502 + abed
->plt
->plt_got_offset
);
4504 if (abed
->is_vxworks
)
4506 int s
, k
, reloc_index
;
4508 /* Create the R_386_32 relocation referencing the GOT
4509 for this PLT entry. */
4511 /* S: Current slot number (zero-based). */
4512 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4513 / abed
->plt
->plt_entry_size
);
4514 /* K: Number of relocations for PLTResolve. */
4516 k
= PLTRESOLVE_RELOCS_SHLIB
;
4518 k
= PLTRESOLVE_RELOCS
;
4519 /* Skip the PLTresolve relocations, and the relocations for
4520 the other PLT slots. */
4521 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4522 loc
= (htab
->srelplt2
->contents
+ reloc_index
4523 * sizeof (Elf32_External_Rel
));
4525 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4526 + htab
->elf
.splt
->output_offset
4527 + h
->plt
.offset
+ 2),
4528 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4529 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4531 /* Create the R_386_32 relocation referencing the beginning of
4532 the PLT for this GOT entry. */
4533 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4534 + htab
->elf
.sgotplt
->output_offset
4536 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4537 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4538 loc
+ sizeof (Elf32_External_Rel
));
4543 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4544 abed
->plt
->plt_entry_size
);
4545 bfd_put_32 (output_bfd
, got_offset
,
4546 plt
->contents
+ h
->plt
.offset
4547 + abed
->plt
->plt_got_offset
);
4550 /* Fill in the entry in the global offset table. */
4551 bfd_put_32 (output_bfd
,
4552 (plt
->output_section
->vma
4553 + plt
->output_offset
4555 + abed
->plt
->plt_lazy_offset
),
4556 gotplt
->contents
+ got_offset
);
4558 /* Fill in the entry in the .rel.plt section. */
4559 rel
.r_offset
= (gotplt
->output_section
->vma
4560 + gotplt
->output_offset
4562 if (h
->dynindx
== -1
4563 || ((info
->executable
4564 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4566 && h
->type
== STT_GNU_IFUNC
))
4568 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4569 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4570 in the .got.plt section. */
4571 bfd_put_32 (output_bfd
,
4572 (h
->root
.u
.def
.value
4573 + h
->root
.u
.def
.section
->output_section
->vma
4574 + h
->root
.u
.def
.section
->output_offset
),
4575 gotplt
->contents
+ got_offset
);
4576 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4577 /* R_386_IRELATIVE comes last. */
4578 plt_index
= htab
->next_irelative_index
--;
4582 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4583 plt_index
= htab
->next_jump_slot_index
++;
4585 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4586 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4588 /* Don't fill PLT entry for static executables. */
4589 if (plt
== htab
->elf
.splt
)
4591 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4592 plt
->contents
+ h
->plt
.offset
4593 + abed
->plt
->plt_reloc_offset
);
4594 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4595 + abed
->plt
->plt_plt_offset
+ 4),
4596 plt
->contents
+ h
->plt
.offset
4597 + abed
->plt
->plt_plt_offset
);
4600 if (!h
->def_regular
)
4602 /* Mark the symbol as undefined, rather than as defined in
4603 the .plt section. Leave the value if there were any
4604 relocations where pointer equality matters (this is a clue
4605 for the dynamic linker, to make function pointer
4606 comparisons work between an application and shared
4607 library), otherwise set it to zero. If a function is only
4608 called from a binary, there is no need to slow down
4609 shared libraries because of that. */
4610 sym
->st_shndx
= SHN_UNDEF
;
4611 if (!h
->pointer_equality_needed
)
4616 if (h
->got
.offset
!= (bfd_vma
) -1
4617 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4618 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4620 Elf_Internal_Rela rel
;
4622 /* This symbol has an entry in the global offset table. Set it
4625 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4628 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4629 + htab
->elf
.sgot
->output_offset
4630 + (h
->got
.offset
& ~(bfd_vma
) 1));
4632 /* If this is a static link, or it is a -Bsymbolic link and the
4633 symbol is defined locally or was forced to be local because
4634 of a version file, we just want to emit a RELATIVE reloc.
4635 The entry in the global offset table will already have been
4636 initialized in the relocate_section function. */
4638 && h
->type
== STT_GNU_IFUNC
)
4642 /* Generate R_386_GLOB_DAT. */
4649 if (!h
->pointer_equality_needed
)
4652 /* For non-shared object, we can't use .got.plt, which
4653 contains the real function addres if we need pointer
4654 equality. We load the GOT entry with the PLT entry. */
4655 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4656 bfd_put_32 (output_bfd
,
4657 (plt
->output_section
->vma
4658 + plt
->output_offset
+ h
->plt
.offset
),
4659 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4663 else if (info
->shared
4664 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4666 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4667 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4671 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4673 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4674 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4675 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4678 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4683 Elf_Internal_Rela rel
;
4685 /* This symbol needs a copy reloc. Set it up. */
4687 if (h
->dynindx
== -1
4688 || (h
->root
.type
!= bfd_link_hash_defined
4689 && h
->root
.type
!= bfd_link_hash_defweak
)
4690 || htab
->srelbss
== NULL
)
4693 rel
.r_offset
= (h
->root
.u
.def
.value
4694 + h
->root
.u
.def
.section
->output_section
->vma
4695 + h
->root
.u
.def
.section
->output_offset
);
4696 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4697 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4703 /* Finish up local dynamic symbol handling. We set the contents of
4704 various dynamic sections here. */
4707 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4709 struct elf_link_hash_entry
*h
4710 = (struct elf_link_hash_entry
*) *slot
;
4711 struct bfd_link_info
*info
4712 = (struct bfd_link_info
*) inf
;
4714 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4718 /* Used to decide how to sort relocs in an optimal manner for the
4719 dynamic linker, before writing them out. */
4721 static enum elf_reloc_type_class
4722 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4723 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4724 const Elf_Internal_Rela
*rela
)
4726 switch (ELF32_R_TYPE (rela
->r_info
))
4728 case R_386_RELATIVE
:
4729 return reloc_class_relative
;
4730 case R_386_JUMP_SLOT
:
4731 return reloc_class_plt
;
4733 return reloc_class_copy
;
4735 return reloc_class_normal
;
4739 /* Finish up the dynamic sections. */
4742 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4743 struct bfd_link_info
*info
)
4745 struct elf_i386_link_hash_table
*htab
;
4748 const struct elf_i386_backend_data
*abed
;
4750 htab
= elf_i386_hash_table (info
);
4754 dynobj
= htab
->elf
.dynobj
;
4755 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4756 abed
= get_elf_i386_backend_data (output_bfd
);
4758 if (htab
->elf
.dynamic_sections_created
)
4760 Elf32_External_Dyn
*dyncon
, *dynconend
;
4762 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4765 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4766 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4767 for (; dyncon
< dynconend
; dyncon
++)
4769 Elf_Internal_Dyn dyn
;
4772 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4777 if (abed
->is_vxworks
4778 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4783 s
= htab
->elf
.sgotplt
;
4784 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4788 s
= htab
->elf
.srelplt
;
4789 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4793 s
= htab
->elf
.srelplt
;
4794 dyn
.d_un
.d_val
= s
->size
;
4798 /* My reading of the SVR4 ABI indicates that the
4799 procedure linkage table relocs (DT_JMPREL) should be
4800 included in the overall relocs (DT_REL). This is
4801 what Solaris does. However, UnixWare can not handle
4802 that case. Therefore, we override the DT_RELSZ entry
4803 here to make it not include the JMPREL relocs. */
4804 s
= htab
->elf
.srelplt
;
4807 dyn
.d_un
.d_val
-= s
->size
;
4811 /* We may not be using the standard ELF linker script.
4812 If .rel.plt is the first .rel section, we adjust
4813 DT_REL to not include it. */
4814 s
= htab
->elf
.srelplt
;
4817 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4819 dyn
.d_un
.d_ptr
+= s
->size
;
4823 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4826 /* Fill in the first entry in the procedure linkage table. */
4827 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4831 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4832 abed
->plt
->plt0_entry_size
);
4833 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4834 abed
->plt0_pad_byte
,
4835 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4839 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4840 abed
->plt
->plt0_entry_size
);
4841 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4842 abed
->plt0_pad_byte
,
4843 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4844 bfd_put_32 (output_bfd
,
4845 (htab
->elf
.sgotplt
->output_section
->vma
4846 + htab
->elf
.sgotplt
->output_offset
4848 htab
->elf
.splt
->contents
4849 + abed
->plt
->plt0_got1_offset
);
4850 bfd_put_32 (output_bfd
,
4851 (htab
->elf
.sgotplt
->output_section
->vma
4852 + htab
->elf
.sgotplt
->output_offset
4854 htab
->elf
.splt
->contents
4855 + abed
->plt
->plt0_got2_offset
);
4857 if (abed
->is_vxworks
)
4859 Elf_Internal_Rela rel
;
4861 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4862 On IA32 we use REL relocations so the addend goes in
4863 the PLT directly. */
4864 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4865 + htab
->elf
.splt
->output_offset
4866 + abed
->plt
->plt0_got1_offset
);
4867 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4868 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4869 htab
->srelplt2
->contents
);
4870 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4871 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4872 + htab
->elf
.splt
->output_offset
4873 + abed
->plt
->plt0_got2_offset
);
4874 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4875 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4876 htab
->srelplt2
->contents
+
4877 sizeof (Elf32_External_Rel
));
4881 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4882 really seem like the right value. */
4883 elf_section_data (htab
->elf
.splt
->output_section
)
4884 ->this_hdr
.sh_entsize
= 4;
4886 /* Correct the .rel.plt.unloaded relocations. */
4887 if (abed
->is_vxworks
&& !info
->shared
)
4889 int num_plts
= (htab
->elf
.splt
->size
4890 / abed
->plt
->plt_entry_size
) - 1;
4893 p
= htab
->srelplt2
->contents
;
4895 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4897 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4899 for (; num_plts
; num_plts
--)
4901 Elf_Internal_Rela rel
;
4902 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4903 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4904 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4905 p
+= sizeof (Elf32_External_Rel
);
4907 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4908 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4909 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4910 p
+= sizeof (Elf32_External_Rel
);
4916 if (htab
->elf
.sgotplt
)
4918 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4920 (*_bfd_error_handler
)
4921 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4925 /* Fill in the first three entries in the global offset table. */
4926 if (htab
->elf
.sgotplt
->size
> 0)
4928 bfd_put_32 (output_bfd
,
4930 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4931 htab
->elf
.sgotplt
->contents
);
4932 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4933 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4936 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4939 /* Adjust .eh_frame for .plt section. */
4940 if (htab
->plt_eh_frame
!= NULL
4941 && htab
->plt_eh_frame
->contents
!= NULL
)
4943 if (htab
->elf
.splt
!= NULL
4944 && htab
->elf
.splt
->size
!= 0
4945 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4946 && htab
->elf
.splt
->output_section
!= NULL
4947 && htab
->plt_eh_frame
->output_section
!= NULL
)
4949 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4950 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4951 + htab
->plt_eh_frame
->output_offset
4952 + PLT_FDE_START_OFFSET
;
4953 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4954 htab
->plt_eh_frame
->contents
4955 + PLT_FDE_START_OFFSET
);
4957 if (htab
->plt_eh_frame
->sec_info_type
4958 == SEC_INFO_TYPE_EH_FRAME
)
4960 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4962 htab
->plt_eh_frame
->contents
))
4967 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4968 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4970 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4971 htab_traverse (htab
->loc_hash_table
,
4972 elf_i386_finish_local_dynamic_symbol
,
4978 /* Return address for Ith PLT stub in section PLT, for relocation REL
4979 or (bfd_vma) -1 if it should not be included. */
4982 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4983 const arelent
*rel ATTRIBUTE_UNUSED
)
4985 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4988 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4991 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4993 if (h
->plt
.offset
!= (bfd_vma
) -1
4995 && !h
->pointer_equality_needed
)
4998 return _bfd_elf_hash_symbol (h
);
5001 /* Hook called by the linker routine which adds symbols from an object
5005 elf_i386_add_symbol_hook (bfd
* abfd
,
5006 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5007 Elf_Internal_Sym
* sym
,
5008 const char ** namep ATTRIBUTE_UNUSED
,
5009 flagword
* flagsp ATTRIBUTE_UNUSED
,
5010 asection
** secp ATTRIBUTE_UNUSED
,
5011 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5013 if ((abfd
->flags
& DYNAMIC
) == 0
5014 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5015 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5016 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5021 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5022 #define TARGET_LITTLE_NAME "elf32-i386"
5023 #define ELF_ARCH bfd_arch_i386
5024 #define ELF_TARGET_ID I386_ELF_DATA
5025 #define ELF_MACHINE_CODE EM_386
5026 #define ELF_MAXPAGESIZE 0x1000
5028 #define elf_backend_can_gc_sections 1
5029 #define elf_backend_can_refcount 1
5030 #define elf_backend_want_got_plt 1
5031 #define elf_backend_plt_readonly 1
5032 #define elf_backend_want_plt_sym 0
5033 #define elf_backend_got_header_size 12
5034 #define elf_backend_plt_alignment 4
5036 /* Support RELA for objdump of prelink objects. */
5037 #define elf_info_to_howto elf_i386_info_to_howto_rel
5038 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5040 #define bfd_elf32_mkobject elf_i386_mkobject
5042 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5043 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5044 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5045 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5046 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5048 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5049 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5050 #define elf_backend_check_relocs elf_i386_check_relocs
5051 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5052 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5053 #define elf_backend_fake_sections elf_i386_fake_sections
5054 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5055 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5056 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5057 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5058 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5059 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5060 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5061 #define elf_backend_relocate_section elf_i386_relocate_section
5062 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5063 #define elf_backend_always_size_sections elf_i386_always_size_sections
5064 #define elf_backend_omit_section_dynsym \
5065 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5066 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5067 #define elf_backend_hash_symbol elf_i386_hash_symbol
5068 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5069 #undef elf_backend_post_process_headers
5070 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5072 #include "elf32-target.h"
5074 /* FreeBSD support. */
5076 #undef TARGET_LITTLE_SYM
5077 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5078 #undef TARGET_LITTLE_NAME
5079 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5081 #define ELF_OSABI ELFOSABI_FREEBSD
5083 /* The kernel recognizes executables as valid only if they carry a
5084 "FreeBSD" label in the ELF header. So we put this label on all
5085 executables and (for simplicity) also all other object files. */
5088 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5090 _bfd_elf_set_osabi (abfd
, info
);
5092 #ifdef OLD_FREEBSD_ABI_LABEL
5093 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5094 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5098 #undef elf_backend_post_process_headers
5099 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5101 #define elf32_bed elf32_i386_fbsd_bed
5103 #undef elf_backend_add_symbol_hook
5105 #include "elf32-target.h"
5109 #undef TARGET_LITTLE_SYM
5110 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5111 #undef TARGET_LITTLE_NAME
5112 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5114 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5115 objects won't be recognized. */
5119 #define elf32_bed elf32_i386_sol2_bed
5121 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5123 #undef elf_backend_static_tls_alignment
5124 #define elf_backend_static_tls_alignment 8
5126 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5128 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5130 #undef elf_backend_want_plt_sym
5131 #define elf_backend_want_plt_sym 1
5133 #include "elf32-target.h"
5135 /* Native Client support. */
5137 #undef TARGET_LITTLE_SYM
5138 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5139 #undef TARGET_LITTLE_NAME
5140 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5142 #define elf32_bed elf32_i386_nacl_bed
5144 #undef ELF_MAXPAGESIZE
5145 #define ELF_MAXPAGESIZE 0x10000
5147 /* Restore defaults. */
5149 #undef elf_backend_want_plt_sym
5150 #define elf_backend_want_plt_sym 0
5151 #undef elf_backend_post_process_headers
5152 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5153 #undef elf_backend_static_tls_alignment
5155 /* NaCl uses substantially different PLT entries for the same effects. */
5157 #undef elf_backend_plt_alignment
5158 #define elf_backend_plt_alignment 5
5159 #define NACL_PLT_ENTRY_SIZE 64
5160 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5162 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5164 0xff, 0x35, /* pushl contents of address */
5165 0, 0, 0, 0, /* replaced with address of .got + 4. */
5166 0x8b, 0x0d, /* movl contents of address, %ecx */
5167 0, 0, 0, 0, /* replaced with address of .got + 8. */
5168 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5169 0xff, 0xe1 /* jmp *%ecx */
5172 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5174 0x8b, 0x0d, /* movl contents of address, %ecx */
5175 0, 0, 0, 0, /* replaced with GOT slot address. */
5176 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5177 0xff, 0xe1, /* jmp *%ecx */
5179 /* Pad to the next 32-byte boundary with nop instructions. */
5181 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5182 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5184 /* Lazy GOT entries point here (32-byte aligned). */
5185 0x68, /* pushl immediate */
5186 0, 0, 0, 0, /* replaced with reloc offset. */
5187 0xe9, /* jmp relative */
5188 0, 0, 0, 0, /* replaced with offset to .plt. */
5190 /* Pad to the next 32-byte boundary with nop instructions. */
5191 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5192 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5196 static const bfd_byte
5197 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5199 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5200 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5201 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5202 0xff, 0xe1, /* jmp *%ecx */
5204 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5205 so pad to that size with nop instructions. */
5206 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5209 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5211 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5212 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5213 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5214 0xff, 0xe1, /* jmp *%ecx */
5216 /* Pad to the next 32-byte boundary with nop instructions. */
5218 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5219 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5221 /* Lazy GOT entries point here (32-byte aligned). */
5222 0x68, /* pushl immediate */
5223 0, 0, 0, 0, /* replaced with offset into relocation table. */
5224 0xe9, /* jmp relative */
5225 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5227 /* Pad to the next 32-byte boundary with nop instructions. */
5228 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5229 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5233 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5235 #if (PLT_CIE_LENGTH != 20 \
5236 || PLT_FDE_LENGTH != 36 \
5237 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5238 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5239 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5241 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5242 0, 0, 0, 0, /* CIE ID */
5243 1, /* CIE version */
5244 'z', 'R', 0, /* Augmentation string */
5245 1, /* Code alignment factor */
5246 0x7c, /* Data alignment factor: -4 */
5247 8, /* Return address column */
5248 1, /* Augmentation size */
5249 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5250 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5251 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5252 DW_CFA_nop
, DW_CFA_nop
,
5254 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5255 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5256 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5257 0, 0, 0, 0, /* .plt size goes here */
5258 0, /* Augmentation size */
5259 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5260 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5261 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5262 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5263 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5264 13, /* Block length */
5265 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5266 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5267 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5268 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5269 DW_CFA_nop
, DW_CFA_nop
5272 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5274 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5275 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5276 2, /* plt0_got1_offset */
5277 8, /* plt0_got2_offset */
5278 elf_i386_nacl_plt_entry
, /* plt_entry */
5279 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5280 2, /* plt_got_offset */
5281 33, /* plt_reloc_offset */
5282 38, /* plt_plt_offset */
5283 32, /* plt_lazy_offset */
5284 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5285 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5286 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5287 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5290 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5292 &elf_i386_nacl_plt
, /* plt */
5293 0x90, /* plt0_pad_byte: nop insn */
5297 #undef elf_backend_arch_data
5298 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5300 #undef elf_backend_modify_segment_map
5301 #define elf_backend_modify_segment_map nacl_modify_segment_map
5302 #undef elf_backend_modify_program_headers
5303 #define elf_backend_modify_program_headers nacl_modify_program_headers
5305 #include "elf32-target.h"
5307 /* Restore defaults. */
5308 #undef elf_backend_modify_segment_map
5309 #undef elf_backend_modify_program_headers
5311 /* VxWorks support. */
5313 #undef TARGET_LITTLE_SYM
5314 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5315 #undef TARGET_LITTLE_NAME
5316 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5318 #undef elf_backend_plt_alignment
5319 #define elf_backend_plt_alignment 4
5321 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5323 &elf_i386_plt
, /* plt */
5324 0x90, /* plt0_pad_byte */
5328 #undef elf_backend_arch_data
5329 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5331 #undef elf_backend_relocs_compatible
5332 #undef elf_backend_post_process_headers
5333 #undef elf_backend_add_symbol_hook
5334 #define elf_backend_add_symbol_hook \
5335 elf_vxworks_add_symbol_hook
5336 #undef elf_backend_link_output_symbol_hook
5337 #define elf_backend_link_output_symbol_hook \
5338 elf_vxworks_link_output_symbol_hook
5339 #undef elf_backend_emit_relocs
5340 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5341 #undef elf_backend_final_write_processing
5342 #define elf_backend_final_write_processing \
5343 elf_vxworks_final_write_processing
5344 #undef elf_backend_static_tls_alignment
5346 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5348 #undef elf_backend_want_plt_sym
5349 #define elf_backend_want_plt_sym 1
5352 #define elf32_bed elf32_i386_vxworks_bed
5354 #include "elf32-target.h"