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
,
2202 else if (htab
->elf
.dynamic_sections_created
2203 && h
->plt
.refcount
> 0)
2205 /* Make sure this symbol is output as a dynamic symbol.
2206 Undefined weak syms won't yet be marked as dynamic. */
2207 if (h
->dynindx
== -1
2208 && !h
->forced_local
)
2210 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2215 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2217 asection
*s
= htab
->elf
.splt
;
2219 /* If this is the first .plt entry, make room for the special
2222 s
->size
+= plt_entry_size
;
2224 h
->plt
.offset
= s
->size
;
2226 /* If this symbol is not defined in a regular file, and we are
2227 not generating a shared library, then set the symbol to this
2228 location in the .plt. This is required to make function
2229 pointers compare as equal between the normal executable and
2230 the shared library. */
2234 h
->root
.u
.def
.section
= s
;
2235 h
->root
.u
.def
.value
= h
->plt
.offset
;
2238 /* Make room for this entry. */
2239 s
->size
+= plt_entry_size
;
2241 /* We also need to make an entry in the .got.plt section, which
2242 will be placed in the .got section by the linker script. */
2243 htab
->elf
.sgotplt
->size
+= 4;
2245 /* We also need to make an entry in the .rel.plt section. */
2246 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2247 htab
->elf
.srelplt
->reloc_count
++;
2249 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2252 /* VxWorks has a second set of relocations for each PLT entry
2253 in executables. They go in a separate relocation section,
2254 which is processed by the kernel loader. */
2256 /* There are two relocations for the initial PLT entry: an
2257 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2258 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2260 if (h
->plt
.offset
== plt_entry_size
)
2261 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2263 /* There are two extra relocations for each subsequent PLT entry:
2264 an R_386_32 relocation for the GOT entry, and an R_386_32
2265 relocation for the PLT entry. */
2267 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2272 h
->plt
.offset
= (bfd_vma
) -1;
2278 h
->plt
.offset
= (bfd_vma
) -1;
2282 eh
->tlsdesc_got
= (bfd_vma
) -1;
2284 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2285 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2286 if (h
->got
.refcount
> 0
2289 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2290 h
->got
.offset
= (bfd_vma
) -1;
2291 else if (h
->got
.refcount
> 0)
2295 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2297 /* Make sure this symbol is output as a dynamic symbol.
2298 Undefined weak syms won't yet be marked as dynamic. */
2299 if (h
->dynindx
== -1
2300 && !h
->forced_local
)
2302 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2307 if (GOT_TLS_GDESC_P (tls_type
))
2309 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2310 - elf_i386_compute_jump_table_size (htab
);
2311 htab
->elf
.sgotplt
->size
+= 8;
2312 h
->got
.offset
= (bfd_vma
) -2;
2314 if (! GOT_TLS_GDESC_P (tls_type
)
2315 || GOT_TLS_GD_P (tls_type
))
2317 h
->got
.offset
= s
->size
;
2319 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2320 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2323 dyn
= htab
->elf
.dynamic_sections_created
;
2324 /* R_386_TLS_IE_32 needs one dynamic relocation,
2325 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2326 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2327 need two), R_386_TLS_GD needs one if local symbol and two if
2329 if (tls_type
== GOT_TLS_IE_BOTH
)
2330 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2331 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2332 || (tls_type
& GOT_TLS_IE
))
2333 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2334 else if (GOT_TLS_GD_P (tls_type
))
2335 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2336 else if (! GOT_TLS_GDESC_P (tls_type
)
2337 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2338 || h
->root
.type
!= bfd_link_hash_undefweak
)
2340 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2341 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2342 if (GOT_TLS_GDESC_P (tls_type
))
2343 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2346 h
->got
.offset
= (bfd_vma
) -1;
2348 if (eh
->dyn_relocs
== NULL
)
2351 /* In the shared -Bsymbolic case, discard space allocated for
2352 dynamic pc-relative relocs against symbols which turn out to be
2353 defined in regular objects. For the normal shared case, discard
2354 space for pc-relative relocs that have become local due to symbol
2355 visibility changes. */
2359 /* The only reloc that uses pc_count is R_386_PC32, which will
2360 appear on a call or on something like ".long foo - .". We
2361 want calls to protected symbols to resolve directly to the
2362 function rather than going via the plt. If people want
2363 function pointer comparisons to work as expected then they
2364 should avoid writing assembly like ".long foo - .". */
2365 if (SYMBOL_CALLS_LOCAL (info
, h
))
2367 struct elf_dyn_relocs
**pp
;
2369 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2371 p
->count
-= p
->pc_count
;
2380 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2382 struct elf_dyn_relocs
**pp
;
2383 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2385 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2392 /* Also discard relocs on undefined weak syms with non-default
2394 if (eh
->dyn_relocs
!= NULL
2395 && h
->root
.type
== bfd_link_hash_undefweak
)
2397 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2398 eh
->dyn_relocs
= NULL
;
2400 /* Make sure undefined weak symbols are output as a dynamic
2402 else if (h
->dynindx
== -1
2403 && !h
->forced_local
)
2405 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2410 else if (ELIMINATE_COPY_RELOCS
)
2412 /* For the non-shared case, discard space for relocs against
2413 symbols which turn out to need copy relocs or are not
2419 || (htab
->elf
.dynamic_sections_created
2420 && (h
->root
.type
== bfd_link_hash_undefweak
2421 || h
->root
.type
== bfd_link_hash_undefined
))))
2423 /* Make sure this symbol is output as a dynamic symbol.
2424 Undefined weak syms won't yet be marked as dynamic. */
2425 if (h
->dynindx
== -1
2426 && !h
->forced_local
)
2428 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2432 /* If that succeeded, we know we'll be keeping all the
2434 if (h
->dynindx
!= -1)
2438 eh
->dyn_relocs
= NULL
;
2443 /* Finally, allocate space. */
2444 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2448 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2450 BFD_ASSERT (sreloc
!= NULL
);
2451 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2457 /* Allocate space in .plt, .got and associated reloc sections for
2458 local dynamic relocs. */
2461 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2463 struct elf_link_hash_entry
*h
2464 = (struct elf_link_hash_entry
*) *slot
;
2466 if (h
->type
!= STT_GNU_IFUNC
2470 || h
->root
.type
!= bfd_link_hash_defined
)
2473 return elf_i386_allocate_dynrelocs (h
, inf
);
2476 /* Find any dynamic relocs that apply to read-only sections. */
2479 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2481 struct elf_i386_link_hash_entry
*eh
;
2482 struct elf_dyn_relocs
*p
;
2484 /* Skip local IFUNC symbols. */
2485 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2488 eh
= (struct elf_i386_link_hash_entry
*) h
;
2489 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2491 asection
*s
= p
->sec
->output_section
;
2493 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2495 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2497 info
->flags
|= DF_TEXTREL
;
2499 if (info
->warn_shared_textrel
&& info
->shared
)
2500 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2501 p
->sec
->owner
, h
->root
.root
.string
,
2504 /* Not an error, just cut short the traversal. */
2512 mov foo@GOT(%reg), %reg
2514 lea foo@GOTOFF(%reg), %reg
2515 with the local symbol, foo. */
2518 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2519 struct bfd_link_info
*link_info
)
2521 Elf_Internal_Shdr
*symtab_hdr
;
2522 Elf_Internal_Rela
*internal_relocs
;
2523 Elf_Internal_Rela
*irel
, *irelend
;
2525 struct elf_i386_link_hash_table
*htab
;
2526 bfd_boolean changed_contents
;
2527 bfd_boolean changed_relocs
;
2528 bfd_signed_vma
*local_got_refcounts
;
2530 /* Don't even try to convert non-ELF outputs. */
2531 if (!is_elf_hash_table (link_info
->hash
))
2534 /* Nothing to do if there are no codes, no relocations or no output. */
2535 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2536 || sec
->reloc_count
== 0
2537 || discarded_section (sec
))
2540 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2542 /* Load the relocations for this section. */
2543 internal_relocs
= (_bfd_elf_link_read_relocs
2544 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2545 link_info
->keep_memory
));
2546 if (internal_relocs
== NULL
)
2549 htab
= elf_i386_hash_table (link_info
);
2550 changed_contents
= FALSE
;
2551 changed_relocs
= FALSE
;
2552 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2554 /* Get the section contents. */
2555 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2556 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2559 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2563 irelend
= internal_relocs
+ sec
->reloc_count
;
2564 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2566 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2567 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2569 struct elf_link_hash_entry
*h
;
2571 if (r_type
!= R_386_GOT32
)
2574 /* Get the symbol referred to by the reloc. */
2575 if (r_symndx
< symtab_hdr
->sh_info
)
2577 Elf_Internal_Sym
*isym
;
2579 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2582 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2583 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2584 && bfd_get_8 (input_bfd
,
2585 contents
+ irel
->r_offset
- 2) == 0x8b)
2587 bfd_put_8 (output_bfd
, 0x8d,
2588 contents
+ irel
->r_offset
- 2);
2589 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2590 if (local_got_refcounts
!= NULL
2591 && local_got_refcounts
[r_symndx
] > 0)
2592 local_got_refcounts
[r_symndx
] -= 1;
2593 changed_contents
= TRUE
;
2594 changed_relocs
= TRUE
;
2599 indx
= r_symndx
- symtab_hdr
->sh_info
;
2600 h
= elf_sym_hashes (abfd
)[indx
];
2601 BFD_ASSERT (h
!= NULL
);
2603 while (h
->root
.type
== bfd_link_hash_indirect
2604 || h
->root
.type
== bfd_link_hash_warning
)
2605 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2607 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2608 optimizing _DYNAMIC since ld.so may use its link-time address. */
2610 && h
->type
!= STT_GNU_IFUNC
2611 && h
!= htab
->elf
.hdynamic
2612 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2613 && bfd_get_8 (input_bfd
,
2614 contents
+ irel
->r_offset
- 2) == 0x8b)
2616 bfd_put_8 (output_bfd
, 0x8d,
2617 contents
+ irel
->r_offset
- 2);
2618 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2619 if (h
->got
.refcount
> 0)
2620 h
->got
.refcount
-= 1;
2621 changed_contents
= TRUE
;
2622 changed_relocs
= TRUE
;
2626 if (contents
!= NULL
2627 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2629 if (!changed_contents
&& !link_info
->keep_memory
)
2633 /* Cache the section contents for elf_link_input_bfd. */
2634 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2638 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2640 if (!changed_relocs
)
2641 free (internal_relocs
);
2643 elf_section_data (sec
)->relocs
= internal_relocs
;
2649 if (contents
!= NULL
2650 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2652 if (internal_relocs
!= NULL
2653 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2654 free (internal_relocs
);
2658 /* Set the sizes of the dynamic sections. */
2661 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2663 struct elf_i386_link_hash_table
*htab
;
2669 htab
= elf_i386_hash_table (info
);
2672 dynobj
= htab
->elf
.dynobj
;
2676 if (htab
->elf
.dynamic_sections_created
)
2678 /* Set the contents of the .interp section to the interpreter. */
2679 if (info
->executable
)
2681 s
= bfd_get_linker_section (dynobj
, ".interp");
2684 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2685 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2689 /* Set up .got offsets for local syms, and space for local dynamic
2691 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2693 bfd_signed_vma
*local_got
;
2694 bfd_signed_vma
*end_local_got
;
2695 char *local_tls_type
;
2696 bfd_vma
*local_tlsdesc_gotent
;
2697 bfd_size_type locsymcount
;
2698 Elf_Internal_Shdr
*symtab_hdr
;
2701 if (! is_i386_elf (ibfd
))
2704 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2706 struct elf_dyn_relocs
*p
;
2708 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2711 for (p
= ((struct elf_dyn_relocs
*)
2712 elf_section_data (s
)->local_dynrel
);
2716 if (!bfd_is_abs_section (p
->sec
)
2717 && bfd_is_abs_section (p
->sec
->output_section
))
2719 /* Input section has been discarded, either because
2720 it is a copy of a linkonce section or due to
2721 linker script /DISCARD/, so we'll be discarding
2724 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2725 && strcmp (p
->sec
->output_section
->name
,
2728 /* Relocations in vxworks .tls_vars sections are
2729 handled specially by the loader. */
2731 else if (p
->count
!= 0)
2733 srel
= elf_section_data (p
->sec
)->sreloc
;
2734 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2735 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2736 && (info
->flags
& DF_TEXTREL
) == 0)
2738 info
->flags
|= DF_TEXTREL
;
2739 if (info
->warn_shared_textrel
&& info
->shared
)
2740 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2741 p
->sec
->owner
, p
->sec
);
2747 local_got
= elf_local_got_refcounts (ibfd
);
2751 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2752 locsymcount
= symtab_hdr
->sh_info
;
2753 end_local_got
= local_got
+ locsymcount
;
2754 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2755 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2757 srel
= htab
->elf
.srelgot
;
2758 for (; local_got
< end_local_got
;
2759 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2761 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2764 if (GOT_TLS_GDESC_P (*local_tls_type
))
2766 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2767 - elf_i386_compute_jump_table_size (htab
);
2768 htab
->elf
.sgotplt
->size
+= 8;
2769 *local_got
= (bfd_vma
) -2;
2771 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2772 || GOT_TLS_GD_P (*local_tls_type
))
2774 *local_got
= s
->size
;
2776 if (GOT_TLS_GD_P (*local_tls_type
)
2777 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2781 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2782 || (*local_tls_type
& GOT_TLS_IE
))
2784 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2785 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2786 else if (GOT_TLS_GD_P (*local_tls_type
)
2787 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2788 srel
->size
+= sizeof (Elf32_External_Rel
);
2789 if (GOT_TLS_GDESC_P (*local_tls_type
))
2790 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2794 *local_got
= (bfd_vma
) -1;
2798 if (htab
->tls_ldm_got
.refcount
> 0)
2800 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2802 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2803 htab
->elf
.sgot
->size
+= 8;
2804 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2807 htab
->tls_ldm_got
.offset
= -1;
2809 /* Allocate global sym .plt and .got entries, and space for global
2810 sym dynamic relocs. */
2811 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2813 /* Allocate .plt and .got entries, and space for local symbols. */
2814 htab_traverse (htab
->loc_hash_table
,
2815 elf_i386_allocate_local_dynrelocs
,
2818 /* For every jump slot reserved in the sgotplt, reloc_count is
2819 incremented. However, when we reserve space for TLS descriptors,
2820 it's not incremented, so in order to compute the space reserved
2821 for them, it suffices to multiply the reloc count by the jump
2824 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2825 so that R_386_IRELATIVE entries come last. */
2826 if (htab
->elf
.srelplt
)
2828 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2829 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2830 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2832 else if (htab
->elf
.irelplt
)
2833 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2836 if (htab
->elf
.sgotplt
)
2838 /* Don't allocate .got.plt section if there are no GOT nor PLT
2839 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2840 if ((htab
->elf
.hgot
== NULL
2841 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2842 && (htab
->elf
.sgotplt
->size
2843 == get_elf_backend_data (output_bfd
)->got_header_size
)
2844 && (htab
->elf
.splt
== NULL
2845 || htab
->elf
.splt
->size
== 0)
2846 && (htab
->elf
.sgot
== NULL
2847 || htab
->elf
.sgot
->size
== 0)
2848 && (htab
->elf
.iplt
== NULL
2849 || htab
->elf
.iplt
->size
== 0)
2850 && (htab
->elf
.igotplt
== NULL
2851 || htab
->elf
.igotplt
->size
== 0))
2852 htab
->elf
.sgotplt
->size
= 0;
2856 if (htab
->plt_eh_frame
!= NULL
2857 && htab
->elf
.splt
!= NULL
2858 && htab
->elf
.splt
->size
!= 0
2859 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2860 && _bfd_elf_eh_frame_present (info
))
2861 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2863 /* We now have determined the sizes of the various dynamic sections.
2864 Allocate memory for them. */
2866 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2868 bfd_boolean strip_section
= TRUE
;
2870 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2873 if (s
== htab
->elf
.splt
2874 || s
== htab
->elf
.sgot
)
2876 /* Strip this section if we don't need it; see the
2878 /* We'd like to strip these sections if they aren't needed, but if
2879 we've exported dynamic symbols from them we must leave them.
2880 It's too late to tell BFD to get rid of the symbols. */
2882 if (htab
->elf
.hplt
!= NULL
)
2883 strip_section
= FALSE
;
2885 else if (s
== htab
->elf
.sgotplt
2886 || s
== htab
->elf
.iplt
2887 || s
== htab
->elf
.igotplt
2888 || s
== htab
->plt_eh_frame
2889 || s
== htab
->sdynbss
)
2891 /* Strip these too. */
2893 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2896 && s
!= htab
->elf
.srelplt
2897 && s
!= htab
->srelplt2
)
2900 /* We use the reloc_count field as a counter if we need
2901 to copy relocs into the output file. */
2906 /* It's not one of our sections, so don't allocate space. */
2912 /* If we don't need this section, strip it from the
2913 output file. This is mostly to handle .rel.bss and
2914 .rel.plt. We must create both sections in
2915 create_dynamic_sections, because they must be created
2916 before the linker maps input sections to output
2917 sections. The linker does that before
2918 adjust_dynamic_symbol is called, and it is that
2919 function which decides whether anything needs to go
2920 into these sections. */
2922 s
->flags
|= SEC_EXCLUDE
;
2926 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2929 /* Allocate memory for the section contents. We use bfd_zalloc
2930 here in case unused entries are not reclaimed before the
2931 section's contents are written out. This should not happen,
2932 but this way if it does, we get a R_386_NONE reloc instead
2934 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2935 if (s
->contents
== NULL
)
2939 if (htab
->plt_eh_frame
!= NULL
2940 && htab
->plt_eh_frame
->contents
!= NULL
)
2942 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2943 sizeof (elf_i386_eh_frame_plt
));
2944 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2945 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2948 if (htab
->elf
.dynamic_sections_created
)
2950 /* Add some entries to the .dynamic section. We fill in the
2951 values later, in elf_i386_finish_dynamic_sections, but we
2952 must add the entries now so that we get the correct size for
2953 the .dynamic section. The DT_DEBUG entry is filled in by the
2954 dynamic linker and used by the debugger. */
2955 #define add_dynamic_entry(TAG, VAL) \
2956 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2958 if (info
->executable
)
2960 if (!add_dynamic_entry (DT_DEBUG
, 0))
2964 if (htab
->elf
.splt
->size
!= 0)
2966 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2967 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2968 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2969 || !add_dynamic_entry (DT_JMPREL
, 0))
2975 if (!add_dynamic_entry (DT_REL
, 0)
2976 || !add_dynamic_entry (DT_RELSZ
, 0)
2977 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2980 /* If any dynamic relocs apply to a read-only section,
2981 then we need a DT_TEXTREL entry. */
2982 if ((info
->flags
& DF_TEXTREL
) == 0)
2983 elf_link_hash_traverse (&htab
->elf
,
2984 elf_i386_readonly_dynrelocs
, info
);
2986 if ((info
->flags
& DF_TEXTREL
) != 0)
2988 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2992 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2993 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
2996 #undef add_dynamic_entry
3002 elf_i386_always_size_sections (bfd
*output_bfd
,
3003 struct bfd_link_info
*info
)
3005 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3009 struct elf_link_hash_entry
*tlsbase
;
3011 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3012 "_TLS_MODULE_BASE_",
3013 FALSE
, FALSE
, FALSE
);
3015 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3017 struct elf_i386_link_hash_table
*htab
;
3018 struct bfd_link_hash_entry
*bh
= NULL
;
3019 const struct elf_backend_data
*bed
3020 = get_elf_backend_data (output_bfd
);
3022 htab
= elf_i386_hash_table (info
);
3026 if (!(_bfd_generic_link_add_one_symbol
3027 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3028 tls_sec
, 0, NULL
, FALSE
,
3029 bed
->collect
, &bh
)))
3032 htab
->tls_module_base
= bh
;
3034 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3035 tlsbase
->def_regular
= 1;
3036 tlsbase
->other
= STV_HIDDEN
;
3037 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3044 /* Set the correct type for an x86 ELF section. We do this by the
3045 section name, which is a hack, but ought to work. */
3048 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3049 Elf_Internal_Shdr
*hdr
,
3054 name
= bfd_get_section_name (abfd
, sec
);
3056 /* This is an ugly, but unfortunately necessary hack that is
3057 needed when producing EFI binaries on x86. It tells
3058 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3059 containing ELF relocation info. We need this hack in order to
3060 be able to generate ELF binaries that can be translated into
3061 EFI applications (which are essentially COFF objects). Those
3062 files contain a COFF ".reloc" section inside an ELFNN object,
3063 which would normally cause BFD to segfault because it would
3064 attempt to interpret this section as containing relocation
3065 entries for section "oc". With this hack enabled, ".reloc"
3066 will be treated as a normal data section, which will avoid the
3067 segfault. However, you won't be able to create an ELFNN binary
3068 with a section named "oc" that needs relocations, but that's
3069 the kind of ugly side-effects you get when detecting section
3070 types based on their names... In practice, this limitation is
3071 unlikely to bite. */
3072 if (strcmp (name
, ".reloc") == 0)
3073 hdr
->sh_type
= SHT_PROGBITS
;
3078 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3079 executables. Rather than setting it to the beginning of the TLS
3080 section, we have to set it to the end. This function may be called
3081 multiple times, it is idempotent. */
3084 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3086 struct elf_i386_link_hash_table
*htab
;
3087 struct bfd_link_hash_entry
*base
;
3089 if (!info
->executable
)
3092 htab
= elf_i386_hash_table (info
);
3096 base
= htab
->tls_module_base
;
3100 base
->u
.def
.value
= htab
->elf
.tls_size
;
3103 /* Return the base VMA address which should be subtracted from real addresses
3104 when resolving @dtpoff relocation.
3105 This is PT_TLS segment p_vaddr. */
3108 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3110 /* If tls_sec is NULL, we should have signalled an error already. */
3111 if (elf_hash_table (info
)->tls_sec
== NULL
)
3113 return elf_hash_table (info
)->tls_sec
->vma
;
3116 /* Return the relocation value for @tpoff relocation
3117 if STT_TLS virtual address is ADDRESS. */
3120 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3122 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3123 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3124 bfd_vma static_tls_size
;
3126 /* If tls_sec is NULL, we should have signalled an error already. */
3127 if (htab
->tls_sec
== NULL
)
3130 /* Consider special static TLS alignment requirements. */
3131 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3132 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3135 /* Relocate an i386 ELF section. */
3138 elf_i386_relocate_section (bfd
*output_bfd
,
3139 struct bfd_link_info
*info
,
3141 asection
*input_section
,
3143 Elf_Internal_Rela
*relocs
,
3144 Elf_Internal_Sym
*local_syms
,
3145 asection
**local_sections
)
3147 struct elf_i386_link_hash_table
*htab
;
3148 Elf_Internal_Shdr
*symtab_hdr
;
3149 struct elf_link_hash_entry
**sym_hashes
;
3150 bfd_vma
*local_got_offsets
;
3151 bfd_vma
*local_tlsdesc_gotents
;
3152 Elf_Internal_Rela
*rel
;
3153 Elf_Internal_Rela
*relend
;
3154 bfd_boolean is_vxworks_tls
;
3155 unsigned plt_entry_size
;
3157 BFD_ASSERT (is_i386_elf (input_bfd
));
3159 htab
= elf_i386_hash_table (info
);
3162 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3163 sym_hashes
= elf_sym_hashes (input_bfd
);
3164 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3165 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3166 /* We have to handle relocations in vxworks .tls_vars sections
3167 specially, because the dynamic loader is 'weird'. */
3168 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3170 && !strcmp (input_section
->output_section
->name
,
3173 elf_i386_set_tls_module_base (info
);
3175 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3178 relend
= relocs
+ input_section
->reloc_count
;
3179 for (; rel
< relend
; rel
++)
3181 unsigned int r_type
;
3182 reloc_howto_type
*howto
;
3183 unsigned long r_symndx
;
3184 struct elf_link_hash_entry
*h
;
3185 Elf_Internal_Sym
*sym
;
3187 bfd_vma off
, offplt
;
3189 bfd_boolean unresolved_reloc
;
3190 bfd_reloc_status_type r
;
3195 r_type
= ELF32_R_TYPE (rel
->r_info
);
3196 if (r_type
== R_386_GNU_VTINHERIT
3197 || r_type
== R_386_GNU_VTENTRY
)
3200 if ((indx
= r_type
) >= R_386_standard
3201 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3202 >= R_386_ext
- R_386_standard
)
3203 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3204 >= R_386_irelative
- R_386_ext
))
3206 (*_bfd_error_handler
)
3207 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3208 input_bfd
, input_section
, r_type
);
3209 bfd_set_error (bfd_error_bad_value
);
3212 howto
= elf_howto_table
+ indx
;
3214 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3218 unresolved_reloc
= FALSE
;
3219 if (r_symndx
< symtab_hdr
->sh_info
)
3221 sym
= local_syms
+ r_symndx
;
3222 sec
= local_sections
[r_symndx
];
3223 relocation
= (sec
->output_section
->vma
3224 + sec
->output_offset
3226 st_size
= sym
->st_size
;
3228 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3229 && ((sec
->flags
& SEC_MERGE
) != 0
3230 || (info
->relocatable
3231 && sec
->output_offset
!= 0)))
3234 bfd_byte
*where
= contents
+ rel
->r_offset
;
3236 switch (howto
->size
)
3239 addend
= bfd_get_8 (input_bfd
, where
);
3240 if (howto
->pc_relative
)
3242 addend
= (addend
^ 0x80) - 0x80;
3247 addend
= bfd_get_16 (input_bfd
, where
);
3248 if (howto
->pc_relative
)
3250 addend
= (addend
^ 0x8000) - 0x8000;
3255 addend
= bfd_get_32 (input_bfd
, where
);
3256 if (howto
->pc_relative
)
3258 addend
= (addend
^ 0x80000000) - 0x80000000;
3266 if (info
->relocatable
)
3267 addend
+= sec
->output_offset
;
3270 asection
*msec
= sec
;
3271 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3273 addend
-= relocation
;
3274 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3277 switch (howto
->size
)
3280 /* FIXME: overflow checks. */
3281 if (howto
->pc_relative
)
3283 bfd_put_8 (input_bfd
, addend
, where
);
3286 if (howto
->pc_relative
)
3288 bfd_put_16 (input_bfd
, addend
, where
);
3291 if (howto
->pc_relative
)
3293 bfd_put_32 (input_bfd
, addend
, where
);
3297 else if (!info
->relocatable
3298 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3300 /* Relocate against local STT_GNU_IFUNC symbol. */
3301 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3306 /* Set STT_GNU_IFUNC symbol value. */
3307 h
->root
.u
.def
.value
= sym
->st_value
;
3308 h
->root
.u
.def
.section
= sec
;
3313 bfd_boolean warned ATTRIBUTE_UNUSED
;
3315 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3316 r_symndx
, symtab_hdr
, sym_hashes
,
3318 unresolved_reloc
, warned
);
3322 if (sec
!= NULL
&& discarded_section (sec
))
3323 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3324 rel
, 1, relend
, howto
, 0, contents
);
3326 if (info
->relocatable
)
3329 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3330 it here if it is defined in a non-shared object. */
3332 && h
->type
== STT_GNU_IFUNC
3335 asection
*plt
, *gotplt
, *base_got
;
3339 if ((input_section
->flags
& SEC_ALLOC
) == 0
3340 || h
->plt
.offset
== (bfd_vma
) -1)
3343 /* STT_GNU_IFUNC symbol must go through PLT. */
3344 if (htab
->elf
.splt
!= NULL
)
3346 plt
= htab
->elf
.splt
;
3347 gotplt
= htab
->elf
.sgotplt
;
3351 plt
= htab
->elf
.iplt
;
3352 gotplt
= htab
->elf
.igotplt
;
3355 relocation
= (plt
->output_section
->vma
3356 + plt
->output_offset
+ h
->plt
.offset
);
3361 if (h
->root
.root
.string
)
3362 name
= h
->root
.root
.string
;
3364 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3366 (*_bfd_error_handler
)
3367 (_("%B: relocation %s against STT_GNU_IFUNC "
3368 "symbol `%s' isn't handled by %s"), input_bfd
,
3369 elf_howto_table
[r_type
].name
,
3370 name
, __FUNCTION__
);
3371 bfd_set_error (bfd_error_bad_value
);
3375 /* Generate dynamic relcoation only when there is a
3376 non-GOT reference in a shared object. */
3377 if (info
->shared
&& h
->non_got_ref
)
3379 Elf_Internal_Rela outrel
;
3383 /* Need a dynamic relocation to get the real function
3385 offset
= _bfd_elf_section_offset (output_bfd
,
3389 if (offset
== (bfd_vma
) -1
3390 || offset
== (bfd_vma
) -2)
3393 outrel
.r_offset
= (input_section
->output_section
->vma
3394 + input_section
->output_offset
3397 if (h
->dynindx
== -1
3399 || info
->executable
)
3401 /* This symbol is resolved locally. */
3402 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3403 bfd_put_32 (output_bfd
,
3404 (h
->root
.u
.def
.value
3405 + h
->root
.u
.def
.section
->output_section
->vma
3406 + h
->root
.u
.def
.section
->output_offset
),
3410 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3412 sreloc
= htab
->elf
.irelifunc
;
3413 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3415 /* If this reloc is against an external symbol, we
3416 do not want to fiddle with the addend. Otherwise,
3417 we need to include the symbol value so that it
3418 becomes an addend for the dynamic reloc. For an
3419 internal symbol, we have updated addend. */
3428 base_got
= htab
->elf
.sgot
;
3429 off
= h
->got
.offset
;
3431 if (base_got
== NULL
)
3434 if (off
== (bfd_vma
) -1)
3436 /* We can't use h->got.offset here to save state, or
3437 even just remember the offset, as finish_dynamic_symbol
3438 would use that as offset into .got. */
3440 if (htab
->elf
.splt
!= NULL
)
3442 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3443 off
= (plt_index
+ 3) * 4;
3444 base_got
= htab
->elf
.sgotplt
;
3448 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3449 off
= plt_index
* 4;
3450 base_got
= htab
->elf
.igotplt
;
3453 if (h
->dynindx
== -1
3457 /* This references the local defitionion. We must
3458 initialize this entry in the global offset table.
3459 Since the offset must always be a multiple of 8,
3460 we use the least significant bit to record
3461 whether we have initialized it already.
3463 When doing a dynamic link, we create a .rela.got
3464 relocation entry to initialize the value. This
3465 is done in the finish_dynamic_symbol routine. */
3470 bfd_put_32 (output_bfd
, relocation
,
3471 base_got
->contents
+ off
);
3478 /* Adjust for static executables. */
3479 if (htab
->elf
.splt
== NULL
)
3480 relocation
+= gotplt
->output_offset
;
3484 relocation
= (base_got
->output_section
->vma
3485 + base_got
->output_offset
+ off
3486 - gotplt
->output_section
->vma
3487 - gotplt
->output_offset
);
3488 /* Adjust for static executables. */
3489 if (htab
->elf
.splt
== NULL
)
3490 relocation
+= gotplt
->output_offset
;
3496 relocation
-= (gotplt
->output_section
->vma
3497 + gotplt
->output_offset
);
3505 /* Relocation is to the entry for this symbol in the global
3507 if (htab
->elf
.sgot
== NULL
)
3514 off
= h
->got
.offset
;
3515 dyn
= htab
->elf
.dynamic_sections_created
;
3516 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3518 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3519 || (ELF_ST_VISIBILITY (h
->other
)
3520 && h
->root
.type
== bfd_link_hash_undefweak
))
3522 /* This is actually a static link, or it is a
3523 -Bsymbolic link and the symbol is defined
3524 locally, or the symbol was forced to be local
3525 because of a version file. We must initialize
3526 this entry in the global offset table. Since the
3527 offset must always be a multiple of 4, we use the
3528 least significant bit to record whether we have
3529 initialized it already.
3531 When doing a dynamic link, we create a .rel.got
3532 relocation entry to initialize the value. This
3533 is done in the finish_dynamic_symbol routine. */
3538 bfd_put_32 (output_bfd
, relocation
,
3539 htab
->elf
.sgot
->contents
+ off
);
3544 unresolved_reloc
= FALSE
;
3548 if (local_got_offsets
== NULL
)
3551 off
= local_got_offsets
[r_symndx
];
3553 /* The offset must always be a multiple of 4. We use
3554 the least significant bit to record whether we have
3555 already generated the necessary reloc. */
3560 bfd_put_32 (output_bfd
, relocation
,
3561 htab
->elf
.sgot
->contents
+ off
);
3566 Elf_Internal_Rela outrel
;
3568 s
= htab
->elf
.srelgot
;
3572 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3573 + htab
->elf
.sgot
->output_offset
3575 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3576 elf_append_rel (output_bfd
, s
, &outrel
);
3579 local_got_offsets
[r_symndx
] |= 1;
3583 if (off
>= (bfd_vma
) -2)
3586 relocation
= htab
->elf
.sgot
->output_section
->vma
3587 + htab
->elf
.sgot
->output_offset
+ off
3588 - htab
->elf
.sgotplt
->output_section
->vma
3589 - htab
->elf
.sgotplt
->output_offset
;
3593 /* Relocation is relative to the start of the global offset
3596 /* Check to make sure it isn't a protected function symbol
3597 for shared library since it may not be local when used
3598 as function address. We also need to make sure that a
3599 symbol is defined locally. */
3600 if (info
->shared
&& h
)
3602 if (!h
->def_regular
)
3606 switch (ELF_ST_VISIBILITY (h
->other
))
3609 v
= _("hidden symbol");
3612 v
= _("internal symbol");
3615 v
= _("protected symbol");
3622 (*_bfd_error_handler
)
3623 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3624 input_bfd
, v
, h
->root
.root
.string
);
3625 bfd_set_error (bfd_error_bad_value
);
3628 else if (!info
->executable
3629 && !SYMBOLIC_BIND (info
, h
)
3630 && h
->type
== STT_FUNC
3631 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3633 (*_bfd_error_handler
)
3634 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3635 input_bfd
, h
->root
.root
.string
);
3636 bfd_set_error (bfd_error_bad_value
);
3641 /* Note that sgot is not involved in this
3642 calculation. We always want the start of .got.plt. If we
3643 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3644 permitted by the ABI, we might have to change this
3646 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3647 + htab
->elf
.sgotplt
->output_offset
;
3651 /* Use global offset table as symbol value. */
3652 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3653 + htab
->elf
.sgotplt
->output_offset
;
3654 unresolved_reloc
= FALSE
;
3658 /* Relocation is to the entry for this symbol in the
3659 procedure linkage table. */
3661 /* Resolve a PLT32 reloc against a local symbol directly,
3662 without using the procedure linkage table. */
3666 if (h
->plt
.offset
== (bfd_vma
) -1
3667 || htab
->elf
.splt
== NULL
)
3669 /* We didn't make a PLT entry for this symbol. This
3670 happens when statically linking PIC code, or when
3671 using -Bsymbolic. */
3675 relocation
= (htab
->elf
.splt
->output_section
->vma
3676 + htab
->elf
.splt
->output_offset
3678 unresolved_reloc
= FALSE
;
3682 /* Set to symbol size. */
3683 relocation
= st_size
;
3688 if ((input_section
->flags
& SEC_ALLOC
) == 0
3694 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3695 || h
->root
.type
!= bfd_link_hash_undefweak
)
3696 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3697 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3698 || (ELIMINATE_COPY_RELOCS
3705 || h
->root
.type
== bfd_link_hash_undefweak
3706 || h
->root
.type
== bfd_link_hash_undefined
)))
3708 Elf_Internal_Rela outrel
;
3709 bfd_boolean skip
, relocate
;
3712 /* When generating a shared object, these relocations
3713 are copied into the output file to be resolved at run
3720 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3722 if (outrel
.r_offset
== (bfd_vma
) -1)
3724 else if (outrel
.r_offset
== (bfd_vma
) -2)
3725 skip
= TRUE
, relocate
= TRUE
;
3726 outrel
.r_offset
+= (input_section
->output_section
->vma
3727 + input_section
->output_offset
);
3730 memset (&outrel
, 0, sizeof outrel
);
3733 && (r_type
== R_386_PC32
3735 || !SYMBOLIC_BIND (info
, h
)
3736 || !h
->def_regular
))
3737 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3740 /* This symbol is local, or marked to become local. */
3742 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3745 sreloc
= elf_section_data (input_section
)->sreloc
;
3747 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3749 r
= bfd_reloc_notsupported
;
3750 goto check_relocation_error
;
3753 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3755 /* If this reloc is against an external symbol, we do
3756 not want to fiddle with the addend. Otherwise, we
3757 need to include the symbol value so that it becomes
3758 an addend for the dynamic reloc. */
3765 if (!info
->executable
)
3767 Elf_Internal_Rela outrel
;
3770 outrel
.r_offset
= rel
->r_offset
3771 + input_section
->output_section
->vma
3772 + input_section
->output_offset
;
3773 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3774 sreloc
= elf_section_data (input_section
)->sreloc
;
3777 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3782 case R_386_TLS_GOTDESC
:
3783 case R_386_TLS_DESC_CALL
:
3784 case R_386_TLS_IE_32
:
3785 case R_386_TLS_GOTIE
:
3786 tls_type
= GOT_UNKNOWN
;
3787 if (h
== NULL
&& local_got_offsets
)
3788 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3790 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3791 if (tls_type
== GOT_TLS_IE
)
3792 tls_type
= GOT_TLS_IE_NEG
;
3794 if (! elf_i386_tls_transition (info
, input_bfd
,
3795 input_section
, contents
,
3796 symtab_hdr
, sym_hashes
,
3797 &r_type
, tls_type
, rel
,
3798 relend
, h
, r_symndx
))
3801 if (r_type
== R_386_TLS_LE_32
)
3803 BFD_ASSERT (! unresolved_reloc
);
3804 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3809 /* GD->LE transition. */
3810 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3813 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3815 movl %gs:0, %eax; subl $foo@tpoff, %eax
3816 (6 byte form of subl). */
3817 memcpy (contents
+ rel
->r_offset
- 3,
3818 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3819 roff
= rel
->r_offset
+ 5;
3823 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3825 movl %gs:0, %eax; subl $foo@tpoff, %eax
3826 (6 byte form of subl). */
3827 memcpy (contents
+ rel
->r_offset
- 2,
3828 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3829 roff
= rel
->r_offset
+ 6;
3831 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3833 /* Skip R_386_PC32/R_386_PLT32. */
3837 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3839 /* GDesc -> LE transition.
3840 It's originally something like:
3841 leal x@tlsdesc(%ebx), %eax
3845 Registers other than %eax may be set up here. */
3850 roff
= rel
->r_offset
;
3851 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3853 /* Now modify the instruction as appropriate. */
3854 /* aoliva FIXME: remove the above and xor the byte
3856 bfd_put_8 (output_bfd
, val
^ 0x86,
3857 contents
+ roff
- 1);
3858 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3862 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3864 /* GDesc -> LE transition.
3872 roff
= rel
->r_offset
;
3873 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3874 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3877 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3881 /* IE->LE transition:
3882 Originally it can be one of:
3890 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3893 /* movl foo, %eax. */
3894 bfd_put_8 (output_bfd
, 0xb8,
3895 contents
+ rel
->r_offset
- 1);
3901 type
= bfd_get_8 (input_bfd
,
3902 contents
+ rel
->r_offset
- 2);
3907 bfd_put_8 (output_bfd
, 0xc7,
3908 contents
+ rel
->r_offset
- 2);
3909 bfd_put_8 (output_bfd
,
3910 0xc0 | ((val
>> 3) & 7),
3911 contents
+ rel
->r_offset
- 1);
3915 bfd_put_8 (output_bfd
, 0x81,
3916 contents
+ rel
->r_offset
- 2);
3917 bfd_put_8 (output_bfd
,
3918 0xc0 | ((val
>> 3) & 7),
3919 contents
+ rel
->r_offset
- 1);
3926 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3927 contents
+ rel
->r_offset
);
3932 unsigned int val
, type
;
3934 /* {IE_32,GOTIE}->LE transition:
3935 Originally it can be one of:
3936 subl foo(%reg1), %reg2
3937 movl foo(%reg1), %reg2
3938 addl foo(%reg1), %reg2
3941 movl $foo, %reg2 (6 byte form)
3942 addl $foo, %reg2. */
3943 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3944 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3948 bfd_put_8 (output_bfd
, 0xc7,
3949 contents
+ rel
->r_offset
- 2);
3950 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3951 contents
+ rel
->r_offset
- 1);
3953 else if (type
== 0x2b)
3956 bfd_put_8 (output_bfd
, 0x81,
3957 contents
+ rel
->r_offset
- 2);
3958 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3959 contents
+ rel
->r_offset
- 1);
3961 else if (type
== 0x03)
3964 bfd_put_8 (output_bfd
, 0x81,
3965 contents
+ rel
->r_offset
- 2);
3966 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3967 contents
+ rel
->r_offset
- 1);
3971 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3972 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3973 contents
+ rel
->r_offset
);
3975 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3976 contents
+ rel
->r_offset
);
3981 if (htab
->elf
.sgot
== NULL
)
3986 off
= h
->got
.offset
;
3987 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3991 if (local_got_offsets
== NULL
)
3994 off
= local_got_offsets
[r_symndx
];
3995 offplt
= local_tlsdesc_gotents
[r_symndx
];
4002 Elf_Internal_Rela outrel
;
4006 if (htab
->elf
.srelgot
== NULL
)
4009 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4011 if (GOT_TLS_GDESC_P (tls_type
))
4014 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4015 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4016 <= htab
->elf
.sgotplt
->size
);
4017 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4018 + htab
->elf
.sgotplt
->output_offset
4020 + htab
->sgotplt_jump_table_size
);
4021 sreloc
= htab
->elf
.srelplt
;
4022 loc
= sreloc
->contents
;
4023 loc
+= (htab
->next_tls_desc_index
++
4024 * sizeof (Elf32_External_Rel
));
4025 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4026 <= sreloc
->contents
+ sreloc
->size
);
4027 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4030 BFD_ASSERT (! unresolved_reloc
);
4031 bfd_put_32 (output_bfd
,
4032 relocation
- elf_i386_dtpoff_base (info
),
4033 htab
->elf
.sgotplt
->contents
+ offplt
4034 + htab
->sgotplt_jump_table_size
+ 4);
4038 bfd_put_32 (output_bfd
, 0,
4039 htab
->elf
.sgotplt
->contents
+ offplt
4040 + htab
->sgotplt_jump_table_size
+ 4);
4044 sreloc
= htab
->elf
.srelgot
;
4046 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4047 + htab
->elf
.sgot
->output_offset
+ off
);
4049 if (GOT_TLS_GD_P (tls_type
))
4050 dr_type
= R_386_TLS_DTPMOD32
;
4051 else if (GOT_TLS_GDESC_P (tls_type
))
4053 else if (tls_type
== GOT_TLS_IE_POS
)
4054 dr_type
= R_386_TLS_TPOFF
;
4056 dr_type
= R_386_TLS_TPOFF32
;
4058 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4059 bfd_put_32 (output_bfd
,
4060 relocation
- elf_i386_dtpoff_base (info
),
4061 htab
->elf
.sgot
->contents
+ off
);
4062 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4063 bfd_put_32 (output_bfd
,
4064 elf_i386_dtpoff_base (info
) - relocation
,
4065 htab
->elf
.sgot
->contents
+ off
);
4066 else if (dr_type
!= R_386_TLS_DESC
)
4067 bfd_put_32 (output_bfd
, 0,
4068 htab
->elf
.sgot
->contents
+ off
);
4069 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4071 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4073 if (GOT_TLS_GD_P (tls_type
))
4077 BFD_ASSERT (! unresolved_reloc
);
4078 bfd_put_32 (output_bfd
,
4079 relocation
- elf_i386_dtpoff_base (info
),
4080 htab
->elf
.sgot
->contents
+ off
+ 4);
4084 bfd_put_32 (output_bfd
, 0,
4085 htab
->elf
.sgot
->contents
+ off
+ 4);
4086 outrel
.r_info
= ELF32_R_INFO (indx
,
4087 R_386_TLS_DTPOFF32
);
4088 outrel
.r_offset
+= 4;
4089 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4092 else if (tls_type
== GOT_TLS_IE_BOTH
)
4094 bfd_put_32 (output_bfd
,
4096 ? relocation
- elf_i386_dtpoff_base (info
)
4098 htab
->elf
.sgot
->contents
+ off
+ 4);
4099 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4100 outrel
.r_offset
+= 4;
4101 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4108 local_got_offsets
[r_symndx
] |= 1;
4111 if (off
>= (bfd_vma
) -2
4112 && ! GOT_TLS_GDESC_P (tls_type
))
4114 if (r_type
== R_386_TLS_GOTDESC
4115 || r_type
== R_386_TLS_DESC_CALL
)
4117 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4118 unresolved_reloc
= FALSE
;
4120 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4122 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4123 + htab
->elf
.sgotplt
->output_offset
;
4124 relocation
= htab
->elf
.sgot
->output_section
->vma
4125 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4126 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4127 && tls_type
== GOT_TLS_IE_BOTH
)
4129 if (r_type
== R_386_TLS_IE
)
4130 relocation
+= g_o_t
;
4131 unresolved_reloc
= FALSE
;
4133 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4135 unsigned int val
, type
;
4138 /* GD->IE transition. */
4139 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4140 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4143 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4145 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4147 roff
= rel
->r_offset
- 3;
4151 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4153 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4154 roff
= rel
->r_offset
- 2;
4156 memcpy (contents
+ roff
,
4157 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4158 contents
[roff
+ 7] = 0x80 | (val
& 7);
4159 /* If foo is used only with foo@gotntpoff(%reg) and
4160 foo@indntpoff, but not with foo@gottpoff(%reg), change
4161 subl $foo@gottpoff(%reg), %eax
4163 addl $foo@gotntpoff(%reg), %eax. */
4164 if (tls_type
== GOT_TLS_IE_POS
)
4165 contents
[roff
+ 6] = 0x03;
4166 bfd_put_32 (output_bfd
,
4167 htab
->elf
.sgot
->output_section
->vma
4168 + htab
->elf
.sgot
->output_offset
+ off
4169 - htab
->elf
.sgotplt
->output_section
->vma
4170 - htab
->elf
.sgotplt
->output_offset
,
4171 contents
+ roff
+ 8);
4172 /* Skip R_386_PLT32. */
4176 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4178 /* GDesc -> IE transition.
4179 It's originally something like:
4180 leal x@tlsdesc(%ebx), %eax
4183 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4185 movl x@gottpoff(%ebx), %eax # before negl %eax
4187 Registers other than %eax may be set up here. */
4191 /* First, make sure it's a leal adding ebx to a 32-bit
4192 offset into any register, although it's probably
4193 almost always going to be eax. */
4194 roff
= rel
->r_offset
;
4196 /* Now modify the instruction as appropriate. */
4197 /* To turn a leal into a movl in the form we use it, it
4198 suffices to change the first byte from 0x8d to 0x8b.
4199 aoliva FIXME: should we decide to keep the leal, all
4200 we have to do is remove the statement below, and
4201 adjust the relaxation of R_386_TLS_DESC_CALL. */
4202 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4204 if (tls_type
== GOT_TLS_IE_BOTH
)
4207 bfd_put_32 (output_bfd
,
4208 htab
->elf
.sgot
->output_section
->vma
4209 + htab
->elf
.sgot
->output_offset
+ off
4210 - htab
->elf
.sgotplt
->output_section
->vma
4211 - htab
->elf
.sgotplt
->output_offset
,
4215 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4217 /* GDesc -> IE transition.
4225 depending on how we transformed the TLS_GOTDESC above.
4230 roff
= rel
->r_offset
;
4232 /* Now modify the instruction as appropriate. */
4233 if (tls_type
!= GOT_TLS_IE_NEG
)
4236 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4237 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4242 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4243 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4253 if (! elf_i386_tls_transition (info
, input_bfd
,
4254 input_section
, contents
,
4255 symtab_hdr
, sym_hashes
,
4256 &r_type
, GOT_UNKNOWN
, rel
,
4257 relend
, h
, r_symndx
))
4260 if (r_type
!= R_386_TLS_LDM
)
4262 /* LD->LE transition:
4263 leal foo(%reg), %eax; call ___tls_get_addr.
4265 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4266 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4267 memcpy (contents
+ rel
->r_offset
- 2,
4268 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4269 /* Skip R_386_PC32/R_386_PLT32. */
4274 if (htab
->elf
.sgot
== NULL
)
4277 off
= htab
->tls_ldm_got
.offset
;
4282 Elf_Internal_Rela outrel
;
4284 if (htab
->elf
.srelgot
== NULL
)
4287 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4288 + htab
->elf
.sgot
->output_offset
+ off
);
4290 bfd_put_32 (output_bfd
, 0,
4291 htab
->elf
.sgot
->contents
+ off
);
4292 bfd_put_32 (output_bfd
, 0,
4293 htab
->elf
.sgot
->contents
+ off
+ 4);
4294 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4295 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4296 htab
->tls_ldm_got
.offset
|= 1;
4298 relocation
= htab
->elf
.sgot
->output_section
->vma
4299 + htab
->elf
.sgot
->output_offset
+ off
4300 - htab
->elf
.sgotplt
->output_section
->vma
4301 - htab
->elf
.sgotplt
->output_offset
;
4302 unresolved_reloc
= FALSE
;
4305 case R_386_TLS_LDO_32
:
4306 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4307 relocation
-= elf_i386_dtpoff_base (info
);
4309 /* When converting LDO to LE, we must negate. */
4310 relocation
= -elf_i386_tpoff (info
, relocation
);
4313 case R_386_TLS_LE_32
:
4315 if (!info
->executable
)
4317 Elf_Internal_Rela outrel
;
4320 outrel
.r_offset
= rel
->r_offset
4321 + input_section
->output_section
->vma
4322 + input_section
->output_offset
;
4323 if (h
!= NULL
&& h
->dynindx
!= -1)
4327 if (r_type
== R_386_TLS_LE_32
)
4328 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4330 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4331 sreloc
= elf_section_data (input_section
)->sreloc
;
4334 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4337 else if (r_type
== R_386_TLS_LE_32
)
4338 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4340 relocation
-= elf_i386_dtpoff_base (info
);
4342 else if (r_type
== R_386_TLS_LE_32
)
4343 relocation
= elf_i386_tpoff (info
, relocation
);
4345 relocation
= -elf_i386_tpoff (info
, relocation
);
4352 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4353 because such sections are not SEC_ALLOC and thus ld.so will
4354 not process them. */
4355 if (unresolved_reloc
4356 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4358 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4359 rel
->r_offset
) != (bfd_vma
) -1)
4361 (*_bfd_error_handler
)
4362 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4365 (long) rel
->r_offset
,
4367 h
->root
.root
.string
);
4372 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4373 contents
, rel
->r_offset
,
4376 check_relocation_error
:
4377 if (r
!= bfd_reloc_ok
)
4382 name
= h
->root
.root
.string
;
4385 name
= bfd_elf_string_from_elf_section (input_bfd
,
4386 symtab_hdr
->sh_link
,
4391 name
= bfd_section_name (input_bfd
, sec
);
4394 if (r
== bfd_reloc_overflow
)
4396 if (! ((*info
->callbacks
->reloc_overflow
)
4397 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4398 (bfd_vma
) 0, input_bfd
, input_section
,
4404 (*_bfd_error_handler
)
4405 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4406 input_bfd
, input_section
,
4407 (long) rel
->r_offset
, name
, (int) r
);
4416 /* Finish up dynamic symbol handling. We set the contents of various
4417 dynamic sections here. */
4420 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4421 struct bfd_link_info
*info
,
4422 struct elf_link_hash_entry
*h
,
4423 Elf_Internal_Sym
*sym
)
4425 struct elf_i386_link_hash_table
*htab
;
4426 unsigned plt_entry_size
;
4427 const struct elf_i386_backend_data
*abed
;
4429 htab
= elf_i386_hash_table (info
);
4433 abed
= get_elf_i386_backend_data (output_bfd
);
4434 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4436 if (h
->plt
.offset
!= (bfd_vma
) -1)
4440 Elf_Internal_Rela rel
;
4442 asection
*plt
, *gotplt
, *relplt
;
4444 /* When building a static executable, use .iplt, .igot.plt and
4445 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4446 if (htab
->elf
.splt
!= NULL
)
4448 plt
= htab
->elf
.splt
;
4449 gotplt
= htab
->elf
.sgotplt
;
4450 relplt
= htab
->elf
.srelplt
;
4454 plt
= htab
->elf
.iplt
;
4455 gotplt
= htab
->elf
.igotplt
;
4456 relplt
= htab
->elf
.irelplt
;
4459 /* This symbol has an entry in the procedure linkage table. Set
4462 if ((h
->dynindx
== -1
4463 && !((h
->forced_local
|| info
->executable
)
4465 && h
->type
== STT_GNU_IFUNC
))
4471 /* Get the index in the procedure linkage table which
4472 corresponds to this symbol. This is the index of this symbol
4473 in all the symbols for which we are making plt entries. The
4474 first entry in the procedure linkage table is reserved.
4476 Get the offset into the .got table of the entry that
4477 corresponds to this function. Each .got entry is 4 bytes.
4478 The first three are reserved.
4480 For static executables, we don't reserve anything. */
4482 if (plt
== htab
->elf
.splt
)
4484 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4485 got_offset
= (got_offset
+ 3) * 4;
4489 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4490 got_offset
= got_offset
* 4;
4493 /* Fill in the entry in the procedure linkage table. */
4496 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4497 abed
->plt
->plt_entry_size
);
4498 bfd_put_32 (output_bfd
,
4499 (gotplt
->output_section
->vma
4500 + gotplt
->output_offset
4502 plt
->contents
+ h
->plt
.offset
4503 + abed
->plt
->plt_got_offset
);
4505 if (abed
->is_vxworks
)
4507 int s
, k
, reloc_index
;
4509 /* Create the R_386_32 relocation referencing the GOT
4510 for this PLT entry. */
4512 /* S: Current slot number (zero-based). */
4513 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4514 / abed
->plt
->plt_entry_size
);
4515 /* K: Number of relocations for PLTResolve. */
4517 k
= PLTRESOLVE_RELOCS_SHLIB
;
4519 k
= PLTRESOLVE_RELOCS
;
4520 /* Skip the PLTresolve relocations, and the relocations for
4521 the other PLT slots. */
4522 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4523 loc
= (htab
->srelplt2
->contents
+ reloc_index
4524 * sizeof (Elf32_External_Rel
));
4526 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4527 + htab
->elf
.splt
->output_offset
4528 + h
->plt
.offset
+ 2),
4529 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4530 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4532 /* Create the R_386_32 relocation referencing the beginning of
4533 the PLT for this GOT entry. */
4534 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4535 + htab
->elf
.sgotplt
->output_offset
4537 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4538 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4539 loc
+ sizeof (Elf32_External_Rel
));
4544 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4545 abed
->plt
->plt_entry_size
);
4546 bfd_put_32 (output_bfd
, got_offset
,
4547 plt
->contents
+ h
->plt
.offset
4548 + abed
->plt
->plt_got_offset
);
4551 /* Fill in the entry in the global offset table. */
4552 bfd_put_32 (output_bfd
,
4553 (plt
->output_section
->vma
4554 + plt
->output_offset
4556 + abed
->plt
->plt_lazy_offset
),
4557 gotplt
->contents
+ got_offset
);
4559 /* Fill in the entry in the .rel.plt section. */
4560 rel
.r_offset
= (gotplt
->output_section
->vma
4561 + gotplt
->output_offset
4563 if (h
->dynindx
== -1
4564 || ((info
->executable
4565 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4567 && h
->type
== STT_GNU_IFUNC
))
4569 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4570 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4571 in the .got.plt section. */
4572 bfd_put_32 (output_bfd
,
4573 (h
->root
.u
.def
.value
4574 + h
->root
.u
.def
.section
->output_section
->vma
4575 + h
->root
.u
.def
.section
->output_offset
),
4576 gotplt
->contents
+ got_offset
);
4577 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4578 /* R_386_IRELATIVE comes last. */
4579 plt_index
= htab
->next_irelative_index
--;
4583 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4584 plt_index
= htab
->next_jump_slot_index
++;
4586 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4587 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4589 /* Don't fill PLT entry for static executables. */
4590 if (plt
== htab
->elf
.splt
)
4592 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4593 plt
->contents
+ h
->plt
.offset
4594 + abed
->plt
->plt_reloc_offset
);
4595 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4596 + abed
->plt
->plt_plt_offset
+ 4),
4597 plt
->contents
+ h
->plt
.offset
4598 + abed
->plt
->plt_plt_offset
);
4601 if (!h
->def_regular
)
4603 /* Mark the symbol as undefined, rather than as defined in
4604 the .plt section. Leave the value if there were any
4605 relocations where pointer equality matters (this is a clue
4606 for the dynamic linker, to make function pointer
4607 comparisons work between an application and shared
4608 library), otherwise set it to zero. If a function is only
4609 called from a binary, there is no need to slow down
4610 shared libraries because of that. */
4611 sym
->st_shndx
= SHN_UNDEF
;
4612 if (!h
->pointer_equality_needed
)
4617 if (h
->got
.offset
!= (bfd_vma
) -1
4618 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4619 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4621 Elf_Internal_Rela rel
;
4623 /* This symbol has an entry in the global offset table. Set it
4626 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4629 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4630 + htab
->elf
.sgot
->output_offset
4631 + (h
->got
.offset
& ~(bfd_vma
) 1));
4633 /* If this is a static link, or it is a -Bsymbolic link and the
4634 symbol is defined locally or was forced to be local because
4635 of a version file, we just want to emit a RELATIVE reloc.
4636 The entry in the global offset table will already have been
4637 initialized in the relocate_section function. */
4639 && h
->type
== STT_GNU_IFUNC
)
4643 /* Generate R_386_GLOB_DAT. */
4650 if (!h
->pointer_equality_needed
)
4653 /* For non-shared object, we can't use .got.plt, which
4654 contains the real function addres if we need pointer
4655 equality. We load the GOT entry with the PLT entry. */
4656 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4657 bfd_put_32 (output_bfd
,
4658 (plt
->output_section
->vma
4659 + plt
->output_offset
+ h
->plt
.offset
),
4660 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4664 else if (info
->shared
4665 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4667 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4668 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4672 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4674 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4675 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4676 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4679 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4684 Elf_Internal_Rela rel
;
4686 /* This symbol needs a copy reloc. Set it up. */
4688 if (h
->dynindx
== -1
4689 || (h
->root
.type
!= bfd_link_hash_defined
4690 && h
->root
.type
!= bfd_link_hash_defweak
)
4691 || htab
->srelbss
== NULL
)
4694 rel
.r_offset
= (h
->root
.u
.def
.value
4695 + h
->root
.u
.def
.section
->output_section
->vma
4696 + h
->root
.u
.def
.section
->output_offset
);
4697 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4698 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4704 /* Finish up local dynamic symbol handling. We set the contents of
4705 various dynamic sections here. */
4708 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4710 struct elf_link_hash_entry
*h
4711 = (struct elf_link_hash_entry
*) *slot
;
4712 struct bfd_link_info
*info
4713 = (struct bfd_link_info
*) inf
;
4715 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4719 /* Used to decide how to sort relocs in an optimal manner for the
4720 dynamic linker, before writing them out. */
4722 static enum elf_reloc_type_class
4723 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4724 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4725 const Elf_Internal_Rela
*rela
)
4727 switch (ELF32_R_TYPE (rela
->r_info
))
4729 case R_386_RELATIVE
:
4730 return reloc_class_relative
;
4731 case R_386_JUMP_SLOT
:
4732 return reloc_class_plt
;
4734 return reloc_class_copy
;
4736 return reloc_class_normal
;
4740 /* Finish up the dynamic sections. */
4743 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4744 struct bfd_link_info
*info
)
4746 struct elf_i386_link_hash_table
*htab
;
4749 const struct elf_i386_backend_data
*abed
;
4751 htab
= elf_i386_hash_table (info
);
4755 dynobj
= htab
->elf
.dynobj
;
4756 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4757 abed
= get_elf_i386_backend_data (output_bfd
);
4759 if (htab
->elf
.dynamic_sections_created
)
4761 Elf32_External_Dyn
*dyncon
, *dynconend
;
4763 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4766 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4767 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4768 for (; dyncon
< dynconend
; dyncon
++)
4770 Elf_Internal_Dyn dyn
;
4773 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4778 if (abed
->is_vxworks
4779 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4784 s
= htab
->elf
.sgotplt
;
4785 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4789 s
= htab
->elf
.srelplt
;
4790 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4794 s
= htab
->elf
.srelplt
;
4795 dyn
.d_un
.d_val
= s
->size
;
4799 /* My reading of the SVR4 ABI indicates that the
4800 procedure linkage table relocs (DT_JMPREL) should be
4801 included in the overall relocs (DT_REL). This is
4802 what Solaris does. However, UnixWare can not handle
4803 that case. Therefore, we override the DT_RELSZ entry
4804 here to make it not include the JMPREL relocs. */
4805 s
= htab
->elf
.srelplt
;
4808 dyn
.d_un
.d_val
-= s
->size
;
4812 /* We may not be using the standard ELF linker script.
4813 If .rel.plt is the first .rel section, we adjust
4814 DT_REL to not include it. */
4815 s
= htab
->elf
.srelplt
;
4818 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4820 dyn
.d_un
.d_ptr
+= s
->size
;
4824 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4827 /* Fill in the first entry in the procedure linkage table. */
4828 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4832 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4833 abed
->plt
->plt0_entry_size
);
4834 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4835 abed
->plt0_pad_byte
,
4836 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4840 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4841 abed
->plt
->plt0_entry_size
);
4842 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4843 abed
->plt0_pad_byte
,
4844 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4845 bfd_put_32 (output_bfd
,
4846 (htab
->elf
.sgotplt
->output_section
->vma
4847 + htab
->elf
.sgotplt
->output_offset
4849 htab
->elf
.splt
->contents
4850 + abed
->plt
->plt0_got1_offset
);
4851 bfd_put_32 (output_bfd
,
4852 (htab
->elf
.sgotplt
->output_section
->vma
4853 + htab
->elf
.sgotplt
->output_offset
4855 htab
->elf
.splt
->contents
4856 + abed
->plt
->plt0_got2_offset
);
4858 if (abed
->is_vxworks
)
4860 Elf_Internal_Rela rel
;
4862 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4863 On IA32 we use REL relocations so the addend goes in
4864 the PLT directly. */
4865 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4866 + htab
->elf
.splt
->output_offset
4867 + abed
->plt
->plt0_got1_offset
);
4868 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4869 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4870 htab
->srelplt2
->contents
);
4871 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4872 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4873 + htab
->elf
.splt
->output_offset
4874 + abed
->plt
->plt0_got2_offset
);
4875 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4876 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4877 htab
->srelplt2
->contents
+
4878 sizeof (Elf32_External_Rel
));
4882 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4883 really seem like the right value. */
4884 elf_section_data (htab
->elf
.splt
->output_section
)
4885 ->this_hdr
.sh_entsize
= 4;
4887 /* Correct the .rel.plt.unloaded relocations. */
4888 if (abed
->is_vxworks
&& !info
->shared
)
4890 int num_plts
= (htab
->elf
.splt
->size
4891 / abed
->plt
->plt_entry_size
) - 1;
4894 p
= htab
->srelplt2
->contents
;
4896 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4898 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4900 for (; num_plts
; num_plts
--)
4902 Elf_Internal_Rela rel
;
4903 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4904 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4905 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4906 p
+= sizeof (Elf32_External_Rel
);
4908 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4909 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4910 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4911 p
+= sizeof (Elf32_External_Rel
);
4917 if (htab
->elf
.sgotplt
)
4919 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4921 (*_bfd_error_handler
)
4922 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4926 /* Fill in the first three entries in the global offset table. */
4927 if (htab
->elf
.sgotplt
->size
> 0)
4929 bfd_put_32 (output_bfd
,
4931 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4932 htab
->elf
.sgotplt
->contents
);
4933 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4934 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4937 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4940 /* Adjust .eh_frame for .plt section. */
4941 if (htab
->plt_eh_frame
!= NULL
4942 && htab
->plt_eh_frame
->contents
!= NULL
)
4944 if (htab
->elf
.splt
!= NULL
4945 && htab
->elf
.splt
->size
!= 0
4946 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4947 && htab
->elf
.splt
->output_section
!= NULL
4948 && htab
->plt_eh_frame
->output_section
!= NULL
)
4950 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4951 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4952 + htab
->plt_eh_frame
->output_offset
4953 + PLT_FDE_START_OFFSET
;
4954 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4955 htab
->plt_eh_frame
->contents
4956 + PLT_FDE_START_OFFSET
);
4958 if (htab
->plt_eh_frame
->sec_info_type
4959 == SEC_INFO_TYPE_EH_FRAME
)
4961 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4963 htab
->plt_eh_frame
->contents
))
4968 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4969 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4971 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4972 htab_traverse (htab
->loc_hash_table
,
4973 elf_i386_finish_local_dynamic_symbol
,
4979 /* Return address for Ith PLT stub in section PLT, for relocation REL
4980 or (bfd_vma) -1 if it should not be included. */
4983 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4984 const arelent
*rel ATTRIBUTE_UNUSED
)
4986 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4989 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4992 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4994 if (h
->plt
.offset
!= (bfd_vma
) -1
4996 && !h
->pointer_equality_needed
)
4999 return _bfd_elf_hash_symbol (h
);
5002 /* Hook called by the linker routine which adds symbols from an object
5006 elf_i386_add_symbol_hook (bfd
* abfd
,
5007 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5008 Elf_Internal_Sym
* sym
,
5009 const char ** namep ATTRIBUTE_UNUSED
,
5010 flagword
* flagsp ATTRIBUTE_UNUSED
,
5011 asection
** secp ATTRIBUTE_UNUSED
,
5012 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5014 if ((abfd
->flags
& DYNAMIC
) == 0
5015 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5016 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5017 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5022 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5023 #define TARGET_LITTLE_NAME "elf32-i386"
5024 #define ELF_ARCH bfd_arch_i386
5025 #define ELF_TARGET_ID I386_ELF_DATA
5026 #define ELF_MACHINE_CODE EM_386
5027 #define ELF_MAXPAGESIZE 0x1000
5029 #define elf_backend_can_gc_sections 1
5030 #define elf_backend_can_refcount 1
5031 #define elf_backend_want_got_plt 1
5032 #define elf_backend_plt_readonly 1
5033 #define elf_backend_want_plt_sym 0
5034 #define elf_backend_got_header_size 12
5035 #define elf_backend_plt_alignment 4
5037 /* Support RELA for objdump of prelink objects. */
5038 #define elf_info_to_howto elf_i386_info_to_howto_rel
5039 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5041 #define bfd_elf32_mkobject elf_i386_mkobject
5043 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5044 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5045 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5046 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5047 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5049 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5050 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5051 #define elf_backend_check_relocs elf_i386_check_relocs
5052 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5053 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5054 #define elf_backend_fake_sections elf_i386_fake_sections
5055 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5056 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5057 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5058 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5059 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5060 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5061 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5062 #define elf_backend_relocate_section elf_i386_relocate_section
5063 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5064 #define elf_backend_always_size_sections elf_i386_always_size_sections
5065 #define elf_backend_omit_section_dynsym \
5066 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5067 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5068 #define elf_backend_hash_symbol elf_i386_hash_symbol
5069 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5070 #undef elf_backend_post_process_headers
5071 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5073 #include "elf32-target.h"
5075 /* FreeBSD support. */
5077 #undef TARGET_LITTLE_SYM
5078 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5079 #undef TARGET_LITTLE_NAME
5080 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5082 #define ELF_OSABI ELFOSABI_FREEBSD
5084 /* The kernel recognizes executables as valid only if they carry a
5085 "FreeBSD" label in the ELF header. So we put this label on all
5086 executables and (for simplicity) also all other object files. */
5089 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5091 _bfd_elf_set_osabi (abfd
, info
);
5093 #ifdef OLD_FREEBSD_ABI_LABEL
5094 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5095 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5099 #undef elf_backend_post_process_headers
5100 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5102 #define elf32_bed elf32_i386_fbsd_bed
5104 #undef elf_backend_add_symbol_hook
5106 #include "elf32-target.h"
5110 #undef TARGET_LITTLE_SYM
5111 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5112 #undef TARGET_LITTLE_NAME
5113 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5115 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5116 objects won't be recognized. */
5120 #define elf32_bed elf32_i386_sol2_bed
5122 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5124 #undef elf_backend_static_tls_alignment
5125 #define elf_backend_static_tls_alignment 8
5127 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5129 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5131 #undef elf_backend_want_plt_sym
5132 #define elf_backend_want_plt_sym 1
5134 #include "elf32-target.h"
5136 /* Native Client support. */
5138 #undef TARGET_LITTLE_SYM
5139 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5140 #undef TARGET_LITTLE_NAME
5141 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5143 #define elf32_bed elf32_i386_nacl_bed
5145 #undef ELF_MAXPAGESIZE
5146 #define ELF_MAXPAGESIZE 0x10000
5148 /* Restore defaults. */
5150 #undef elf_backend_want_plt_sym
5151 #define elf_backend_want_plt_sym 0
5152 #undef elf_backend_post_process_headers
5153 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5154 #undef elf_backend_static_tls_alignment
5156 /* NaCl uses substantially different PLT entries for the same effects. */
5158 #undef elf_backend_plt_alignment
5159 #define elf_backend_plt_alignment 5
5160 #define NACL_PLT_ENTRY_SIZE 64
5161 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5163 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5165 0xff, 0x35, /* pushl contents of address */
5166 0, 0, 0, 0, /* replaced with address of .got + 4. */
5167 0x8b, 0x0d, /* movl contents of address, %ecx */
5168 0, 0, 0, 0, /* replaced with address of .got + 8. */
5169 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5170 0xff, 0xe1 /* jmp *%ecx */
5173 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5175 0x8b, 0x0d, /* movl contents of address, %ecx */
5176 0, 0, 0, 0, /* replaced with GOT slot address. */
5177 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5178 0xff, 0xe1, /* jmp *%ecx */
5180 /* Pad to the next 32-byte boundary with nop instructions. */
5182 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5183 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5185 /* Lazy GOT entries point here (32-byte aligned). */
5186 0x68, /* pushl immediate */
5187 0, 0, 0, 0, /* replaced with reloc offset. */
5188 0xe9, /* jmp relative */
5189 0, 0, 0, 0, /* replaced with offset to .plt. */
5191 /* Pad to the next 32-byte boundary with nop instructions. */
5192 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5193 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5197 static const bfd_byte
5198 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5200 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5201 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5202 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5203 0xff, 0xe1, /* jmp *%ecx */
5205 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5206 so pad to that size with nop instructions. */
5207 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5210 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5212 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5213 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5214 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5215 0xff, 0xe1, /* jmp *%ecx */
5217 /* Pad to the next 32-byte boundary with nop instructions. */
5219 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5220 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5222 /* Lazy GOT entries point here (32-byte aligned). */
5223 0x68, /* pushl immediate */
5224 0, 0, 0, 0, /* replaced with offset into relocation table. */
5225 0xe9, /* jmp relative */
5226 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5228 /* Pad to the next 32-byte boundary with nop instructions. */
5229 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5230 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5234 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5236 #if (PLT_CIE_LENGTH != 20 \
5237 || PLT_FDE_LENGTH != 36 \
5238 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5239 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5240 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5242 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5243 0, 0, 0, 0, /* CIE ID */
5244 1, /* CIE version */
5245 'z', 'R', 0, /* Augmentation string */
5246 1, /* Code alignment factor */
5247 0x7c, /* Data alignment factor: -4 */
5248 8, /* Return address column */
5249 1, /* Augmentation size */
5250 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5251 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5252 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5253 DW_CFA_nop
, DW_CFA_nop
,
5255 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5256 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5257 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5258 0, 0, 0, 0, /* .plt size goes here */
5259 0, /* Augmentation size */
5260 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5261 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5262 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5263 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5264 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5265 13, /* Block length */
5266 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5267 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5268 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5269 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5270 DW_CFA_nop
, DW_CFA_nop
5273 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5275 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5276 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5277 2, /* plt0_got1_offset */
5278 8, /* plt0_got2_offset */
5279 elf_i386_nacl_plt_entry
, /* plt_entry */
5280 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5281 2, /* plt_got_offset */
5282 33, /* plt_reloc_offset */
5283 38, /* plt_plt_offset */
5284 32, /* plt_lazy_offset */
5285 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5286 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5287 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5288 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5291 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5293 &elf_i386_nacl_plt
, /* plt */
5294 0x90, /* plt0_pad_byte: nop insn */
5298 #undef elf_backend_arch_data
5299 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5301 #undef elf_backend_modify_segment_map
5302 #define elf_backend_modify_segment_map nacl_modify_segment_map
5303 #undef elf_backend_modify_program_headers
5304 #define elf_backend_modify_program_headers nacl_modify_program_headers
5305 #undef elf_backend_final_write_processing
5306 #define elf_backend_final_write_processing nacl_final_write_processing
5308 #include "elf32-target.h"
5310 /* Restore defaults. */
5311 #undef elf_backend_modify_segment_map
5312 #undef elf_backend_modify_program_headers
5313 #undef elf_backend_final_write_processing
5315 /* VxWorks support. */
5317 #undef TARGET_LITTLE_SYM
5318 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5319 #undef TARGET_LITTLE_NAME
5320 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5322 #undef elf_backend_plt_alignment
5323 #define elf_backend_plt_alignment 4
5325 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5327 &elf_i386_plt
, /* plt */
5328 0x90, /* plt0_pad_byte */
5332 #undef elf_backend_arch_data
5333 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5335 #undef elf_backend_relocs_compatible
5336 #undef elf_backend_post_process_headers
5337 #undef elf_backend_add_symbol_hook
5338 #define elf_backend_add_symbol_hook \
5339 elf_vxworks_add_symbol_hook
5340 #undef elf_backend_link_output_symbol_hook
5341 #define elf_backend_link_output_symbol_hook \
5342 elf_vxworks_link_output_symbol_hook
5343 #undef elf_backend_emit_relocs
5344 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5345 #undef elf_backend_final_write_processing
5346 #define elf_backend_final_write_processing \
5347 elf_vxworks_final_write_processing
5348 #undef elf_backend_static_tls_alignment
5350 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5352 #undef elf_backend_want_plt_sym
5353 #define elf_backend_want_plt_sym 1
5356 #define elf32_bed elf32_i386_vxworks_bed
5358 #include "elf32-target.h"