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
;
3314 bfd_boolean ignored ATTRIBUTE_UNUSED
;
3316 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3317 r_symndx
, symtab_hdr
, sym_hashes
,
3319 unresolved_reloc
, warned
, ignored
);
3323 if (sec
!= NULL
&& discarded_section (sec
))
3324 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3325 rel
, 1, relend
, howto
, 0, contents
);
3327 if (info
->relocatable
)
3330 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3331 it here if it is defined in a non-shared object. */
3333 && h
->type
== STT_GNU_IFUNC
3336 asection
*plt
, *gotplt
, *base_got
;
3340 if ((input_section
->flags
& SEC_ALLOC
) == 0
3341 || h
->plt
.offset
== (bfd_vma
) -1)
3344 /* STT_GNU_IFUNC symbol must go through PLT. */
3345 if (htab
->elf
.splt
!= NULL
)
3347 plt
= htab
->elf
.splt
;
3348 gotplt
= htab
->elf
.sgotplt
;
3352 plt
= htab
->elf
.iplt
;
3353 gotplt
= htab
->elf
.igotplt
;
3356 relocation
= (plt
->output_section
->vma
3357 + plt
->output_offset
+ h
->plt
.offset
);
3362 if (h
->root
.root
.string
)
3363 name
= h
->root
.root
.string
;
3365 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3367 (*_bfd_error_handler
)
3368 (_("%B: relocation %s against STT_GNU_IFUNC "
3369 "symbol `%s' isn't handled by %s"), input_bfd
,
3370 elf_howto_table
[r_type
].name
,
3371 name
, __FUNCTION__
);
3372 bfd_set_error (bfd_error_bad_value
);
3376 /* Generate dynamic relcoation only when there is a
3377 non-GOT reference in a shared object. */
3378 if (info
->shared
&& h
->non_got_ref
)
3380 Elf_Internal_Rela outrel
;
3384 /* Need a dynamic relocation to get the real function
3386 offset
= _bfd_elf_section_offset (output_bfd
,
3390 if (offset
== (bfd_vma
) -1
3391 || offset
== (bfd_vma
) -2)
3394 outrel
.r_offset
= (input_section
->output_section
->vma
3395 + input_section
->output_offset
3398 if (h
->dynindx
== -1
3400 || info
->executable
)
3402 /* This symbol is resolved locally. */
3403 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3404 bfd_put_32 (output_bfd
,
3405 (h
->root
.u
.def
.value
3406 + h
->root
.u
.def
.section
->output_section
->vma
3407 + h
->root
.u
.def
.section
->output_offset
),
3411 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3413 sreloc
= htab
->elf
.irelifunc
;
3414 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3416 /* If this reloc is against an external symbol, we
3417 do not want to fiddle with the addend. Otherwise,
3418 we need to include the symbol value so that it
3419 becomes an addend for the dynamic reloc. For an
3420 internal symbol, we have updated addend. */
3429 base_got
= htab
->elf
.sgot
;
3430 off
= h
->got
.offset
;
3432 if (base_got
== NULL
)
3435 if (off
== (bfd_vma
) -1)
3437 /* We can't use h->got.offset here to save state, or
3438 even just remember the offset, as finish_dynamic_symbol
3439 would use that as offset into .got. */
3441 if (htab
->elf
.splt
!= NULL
)
3443 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3444 off
= (plt_index
+ 3) * 4;
3445 base_got
= htab
->elf
.sgotplt
;
3449 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3450 off
= plt_index
* 4;
3451 base_got
= htab
->elf
.igotplt
;
3454 if (h
->dynindx
== -1
3458 /* This references the local defitionion. We must
3459 initialize this entry in the global offset table.
3460 Since the offset must always be a multiple of 8,
3461 we use the least significant bit to record
3462 whether we have initialized it already.
3464 When doing a dynamic link, we create a .rela.got
3465 relocation entry to initialize the value. This
3466 is done in the finish_dynamic_symbol routine. */
3471 bfd_put_32 (output_bfd
, relocation
,
3472 base_got
->contents
+ off
);
3479 /* Adjust for static executables. */
3480 if (htab
->elf
.splt
== NULL
)
3481 relocation
+= gotplt
->output_offset
;
3485 relocation
= (base_got
->output_section
->vma
3486 + base_got
->output_offset
+ off
3487 - gotplt
->output_section
->vma
3488 - gotplt
->output_offset
);
3489 /* Adjust for static executables. */
3490 if (htab
->elf
.splt
== NULL
)
3491 relocation
+= gotplt
->output_offset
;
3497 relocation
-= (gotplt
->output_section
->vma
3498 + gotplt
->output_offset
);
3506 /* Relocation is to the entry for this symbol in the global
3508 if (htab
->elf
.sgot
== NULL
)
3515 off
= h
->got
.offset
;
3516 dyn
= htab
->elf
.dynamic_sections_created
;
3517 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3519 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3520 || (ELF_ST_VISIBILITY (h
->other
)
3521 && h
->root
.type
== bfd_link_hash_undefweak
))
3523 /* This is actually a static link, or it is a
3524 -Bsymbolic link and the symbol is defined
3525 locally, or the symbol was forced to be local
3526 because of a version file. We must initialize
3527 this entry in the global offset table. Since the
3528 offset must always be a multiple of 4, we use the
3529 least significant bit to record whether we have
3530 initialized it already.
3532 When doing a dynamic link, we create a .rel.got
3533 relocation entry to initialize the value. This
3534 is done in the finish_dynamic_symbol routine. */
3539 bfd_put_32 (output_bfd
, relocation
,
3540 htab
->elf
.sgot
->contents
+ off
);
3545 unresolved_reloc
= FALSE
;
3549 if (local_got_offsets
== NULL
)
3552 off
= local_got_offsets
[r_symndx
];
3554 /* The offset must always be a multiple of 4. We use
3555 the least significant bit to record whether we have
3556 already generated the necessary reloc. */
3561 bfd_put_32 (output_bfd
, relocation
,
3562 htab
->elf
.sgot
->contents
+ off
);
3567 Elf_Internal_Rela outrel
;
3569 s
= htab
->elf
.srelgot
;
3573 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3574 + htab
->elf
.sgot
->output_offset
3576 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3577 elf_append_rel (output_bfd
, s
, &outrel
);
3580 local_got_offsets
[r_symndx
] |= 1;
3584 if (off
>= (bfd_vma
) -2)
3587 relocation
= htab
->elf
.sgot
->output_section
->vma
3588 + htab
->elf
.sgot
->output_offset
+ off
3589 - htab
->elf
.sgotplt
->output_section
->vma
3590 - htab
->elf
.sgotplt
->output_offset
;
3594 /* Relocation is relative to the start of the global offset
3597 /* Check to make sure it isn't a protected function symbol
3598 for shared library since it may not be local when used
3599 as function address. We also need to make sure that a
3600 symbol is defined locally. */
3601 if (info
->shared
&& h
)
3603 if (!h
->def_regular
)
3607 switch (ELF_ST_VISIBILITY (h
->other
))
3610 v
= _("hidden symbol");
3613 v
= _("internal symbol");
3616 v
= _("protected symbol");
3623 (*_bfd_error_handler
)
3624 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3625 input_bfd
, v
, h
->root
.root
.string
);
3626 bfd_set_error (bfd_error_bad_value
);
3629 else if (!info
->executable
3630 && !SYMBOLIC_BIND (info
, h
)
3631 && h
->type
== STT_FUNC
3632 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3634 (*_bfd_error_handler
)
3635 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3636 input_bfd
, h
->root
.root
.string
);
3637 bfd_set_error (bfd_error_bad_value
);
3642 /* Note that sgot is not involved in this
3643 calculation. We always want the start of .got.plt. If we
3644 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3645 permitted by the ABI, we might have to change this
3647 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3648 + htab
->elf
.sgotplt
->output_offset
;
3652 /* Use global offset table as symbol value. */
3653 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3654 + htab
->elf
.sgotplt
->output_offset
;
3655 unresolved_reloc
= FALSE
;
3659 /* Relocation is to the entry for this symbol in the
3660 procedure linkage table. */
3662 /* Resolve a PLT32 reloc against a local symbol directly,
3663 without using the procedure linkage table. */
3667 if (h
->plt
.offset
== (bfd_vma
) -1
3668 || htab
->elf
.splt
== NULL
)
3670 /* We didn't make a PLT entry for this symbol. This
3671 happens when statically linking PIC code, or when
3672 using -Bsymbolic. */
3676 relocation
= (htab
->elf
.splt
->output_section
->vma
3677 + htab
->elf
.splt
->output_offset
3679 unresolved_reloc
= FALSE
;
3683 /* Set to symbol size. */
3684 relocation
= st_size
;
3689 if ((input_section
->flags
& SEC_ALLOC
) == 0
3695 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3696 || h
->root
.type
!= bfd_link_hash_undefweak
)
3697 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3698 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3699 || (ELIMINATE_COPY_RELOCS
3706 || h
->root
.type
== bfd_link_hash_undefweak
3707 || h
->root
.type
== bfd_link_hash_undefined
)))
3709 Elf_Internal_Rela outrel
;
3710 bfd_boolean skip
, relocate
;
3713 /* When generating a shared object, these relocations
3714 are copied into the output file to be resolved at run
3721 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3723 if (outrel
.r_offset
== (bfd_vma
) -1)
3725 else if (outrel
.r_offset
== (bfd_vma
) -2)
3726 skip
= TRUE
, relocate
= TRUE
;
3727 outrel
.r_offset
+= (input_section
->output_section
->vma
3728 + input_section
->output_offset
);
3731 memset (&outrel
, 0, sizeof outrel
);
3734 && (r_type
== R_386_PC32
3736 || !SYMBOLIC_BIND (info
, h
)
3737 || !h
->def_regular
))
3738 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3741 /* This symbol is local, or marked to become local. */
3743 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3746 sreloc
= elf_section_data (input_section
)->sreloc
;
3748 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3750 r
= bfd_reloc_notsupported
;
3751 goto check_relocation_error
;
3754 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3756 /* If this reloc is against an external symbol, we do
3757 not want to fiddle with the addend. Otherwise, we
3758 need to include the symbol value so that it becomes
3759 an addend for the dynamic reloc. */
3766 if (!info
->executable
)
3768 Elf_Internal_Rela outrel
;
3771 outrel
.r_offset
= rel
->r_offset
3772 + input_section
->output_section
->vma
3773 + input_section
->output_offset
;
3774 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3775 sreloc
= elf_section_data (input_section
)->sreloc
;
3778 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3783 case R_386_TLS_GOTDESC
:
3784 case R_386_TLS_DESC_CALL
:
3785 case R_386_TLS_IE_32
:
3786 case R_386_TLS_GOTIE
:
3787 tls_type
= GOT_UNKNOWN
;
3788 if (h
== NULL
&& local_got_offsets
)
3789 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3791 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3792 if (tls_type
== GOT_TLS_IE
)
3793 tls_type
= GOT_TLS_IE_NEG
;
3795 if (! elf_i386_tls_transition (info
, input_bfd
,
3796 input_section
, contents
,
3797 symtab_hdr
, sym_hashes
,
3798 &r_type
, tls_type
, rel
,
3799 relend
, h
, r_symndx
))
3802 if (r_type
== R_386_TLS_LE_32
)
3804 BFD_ASSERT (! unresolved_reloc
);
3805 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3810 /* GD->LE transition. */
3811 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3814 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3816 movl %gs:0, %eax; subl $foo@tpoff, %eax
3817 (6 byte form of subl). */
3818 memcpy (contents
+ rel
->r_offset
- 3,
3819 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3820 roff
= rel
->r_offset
+ 5;
3824 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3826 movl %gs:0, %eax; subl $foo@tpoff, %eax
3827 (6 byte form of subl). */
3828 memcpy (contents
+ rel
->r_offset
- 2,
3829 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3830 roff
= rel
->r_offset
+ 6;
3832 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3834 /* Skip R_386_PC32/R_386_PLT32. */
3838 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3840 /* GDesc -> LE transition.
3841 It's originally something like:
3842 leal x@tlsdesc(%ebx), %eax
3846 Registers other than %eax may be set up here. */
3851 roff
= rel
->r_offset
;
3852 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3854 /* Now modify the instruction as appropriate. */
3855 /* aoliva FIXME: remove the above and xor the byte
3857 bfd_put_8 (output_bfd
, val
^ 0x86,
3858 contents
+ roff
- 1);
3859 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3863 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3865 /* GDesc -> LE transition.
3873 roff
= rel
->r_offset
;
3874 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3875 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3878 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3882 /* IE->LE transition:
3883 Originally it can be one of:
3891 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3894 /* movl foo, %eax. */
3895 bfd_put_8 (output_bfd
, 0xb8,
3896 contents
+ rel
->r_offset
- 1);
3902 type
= bfd_get_8 (input_bfd
,
3903 contents
+ rel
->r_offset
- 2);
3908 bfd_put_8 (output_bfd
, 0xc7,
3909 contents
+ rel
->r_offset
- 2);
3910 bfd_put_8 (output_bfd
,
3911 0xc0 | ((val
>> 3) & 7),
3912 contents
+ rel
->r_offset
- 1);
3916 bfd_put_8 (output_bfd
, 0x81,
3917 contents
+ rel
->r_offset
- 2);
3918 bfd_put_8 (output_bfd
,
3919 0xc0 | ((val
>> 3) & 7),
3920 contents
+ rel
->r_offset
- 1);
3927 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3928 contents
+ rel
->r_offset
);
3933 unsigned int val
, type
;
3935 /* {IE_32,GOTIE}->LE transition:
3936 Originally it can be one of:
3937 subl foo(%reg1), %reg2
3938 movl foo(%reg1), %reg2
3939 addl foo(%reg1), %reg2
3942 movl $foo, %reg2 (6 byte form)
3943 addl $foo, %reg2. */
3944 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3945 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3949 bfd_put_8 (output_bfd
, 0xc7,
3950 contents
+ rel
->r_offset
- 2);
3951 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3952 contents
+ rel
->r_offset
- 1);
3954 else if (type
== 0x2b)
3957 bfd_put_8 (output_bfd
, 0x81,
3958 contents
+ rel
->r_offset
- 2);
3959 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3960 contents
+ rel
->r_offset
- 1);
3962 else if (type
== 0x03)
3965 bfd_put_8 (output_bfd
, 0x81,
3966 contents
+ rel
->r_offset
- 2);
3967 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3968 contents
+ rel
->r_offset
- 1);
3972 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3973 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3974 contents
+ rel
->r_offset
);
3976 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3977 contents
+ rel
->r_offset
);
3982 if (htab
->elf
.sgot
== NULL
)
3987 off
= h
->got
.offset
;
3988 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
3992 if (local_got_offsets
== NULL
)
3995 off
= local_got_offsets
[r_symndx
];
3996 offplt
= local_tlsdesc_gotents
[r_symndx
];
4003 Elf_Internal_Rela outrel
;
4007 if (htab
->elf
.srelgot
== NULL
)
4010 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4012 if (GOT_TLS_GDESC_P (tls_type
))
4015 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4016 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4017 <= htab
->elf
.sgotplt
->size
);
4018 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4019 + htab
->elf
.sgotplt
->output_offset
4021 + htab
->sgotplt_jump_table_size
);
4022 sreloc
= htab
->elf
.srelplt
;
4023 loc
= sreloc
->contents
;
4024 loc
+= (htab
->next_tls_desc_index
++
4025 * sizeof (Elf32_External_Rel
));
4026 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4027 <= sreloc
->contents
+ sreloc
->size
);
4028 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4031 BFD_ASSERT (! unresolved_reloc
);
4032 bfd_put_32 (output_bfd
,
4033 relocation
- elf_i386_dtpoff_base (info
),
4034 htab
->elf
.sgotplt
->contents
+ offplt
4035 + htab
->sgotplt_jump_table_size
+ 4);
4039 bfd_put_32 (output_bfd
, 0,
4040 htab
->elf
.sgotplt
->contents
+ offplt
4041 + htab
->sgotplt_jump_table_size
+ 4);
4045 sreloc
= htab
->elf
.srelgot
;
4047 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4048 + htab
->elf
.sgot
->output_offset
+ off
);
4050 if (GOT_TLS_GD_P (tls_type
))
4051 dr_type
= R_386_TLS_DTPMOD32
;
4052 else if (GOT_TLS_GDESC_P (tls_type
))
4054 else if (tls_type
== GOT_TLS_IE_POS
)
4055 dr_type
= R_386_TLS_TPOFF
;
4057 dr_type
= R_386_TLS_TPOFF32
;
4059 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4060 bfd_put_32 (output_bfd
,
4061 relocation
- elf_i386_dtpoff_base (info
),
4062 htab
->elf
.sgot
->contents
+ off
);
4063 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4064 bfd_put_32 (output_bfd
,
4065 elf_i386_dtpoff_base (info
) - relocation
,
4066 htab
->elf
.sgot
->contents
+ off
);
4067 else if (dr_type
!= R_386_TLS_DESC
)
4068 bfd_put_32 (output_bfd
, 0,
4069 htab
->elf
.sgot
->contents
+ off
);
4070 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4072 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4074 if (GOT_TLS_GD_P (tls_type
))
4078 BFD_ASSERT (! unresolved_reloc
);
4079 bfd_put_32 (output_bfd
,
4080 relocation
- elf_i386_dtpoff_base (info
),
4081 htab
->elf
.sgot
->contents
+ off
+ 4);
4085 bfd_put_32 (output_bfd
, 0,
4086 htab
->elf
.sgot
->contents
+ off
+ 4);
4087 outrel
.r_info
= ELF32_R_INFO (indx
,
4088 R_386_TLS_DTPOFF32
);
4089 outrel
.r_offset
+= 4;
4090 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4093 else if (tls_type
== GOT_TLS_IE_BOTH
)
4095 bfd_put_32 (output_bfd
,
4097 ? relocation
- elf_i386_dtpoff_base (info
)
4099 htab
->elf
.sgot
->contents
+ off
+ 4);
4100 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4101 outrel
.r_offset
+= 4;
4102 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4109 local_got_offsets
[r_symndx
] |= 1;
4112 if (off
>= (bfd_vma
) -2
4113 && ! GOT_TLS_GDESC_P (tls_type
))
4115 if (r_type
== R_386_TLS_GOTDESC
4116 || r_type
== R_386_TLS_DESC_CALL
)
4118 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4119 unresolved_reloc
= FALSE
;
4121 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4123 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4124 + htab
->elf
.sgotplt
->output_offset
;
4125 relocation
= htab
->elf
.sgot
->output_section
->vma
4126 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4127 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4128 && tls_type
== GOT_TLS_IE_BOTH
)
4130 if (r_type
== R_386_TLS_IE
)
4131 relocation
+= g_o_t
;
4132 unresolved_reloc
= FALSE
;
4134 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4136 unsigned int val
, type
;
4139 /* GD->IE transition. */
4140 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4141 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4144 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4146 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4148 roff
= rel
->r_offset
- 3;
4152 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4154 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4155 roff
= rel
->r_offset
- 2;
4157 memcpy (contents
+ roff
,
4158 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4159 contents
[roff
+ 7] = 0x80 | (val
& 7);
4160 /* If foo is used only with foo@gotntpoff(%reg) and
4161 foo@indntpoff, but not with foo@gottpoff(%reg), change
4162 subl $foo@gottpoff(%reg), %eax
4164 addl $foo@gotntpoff(%reg), %eax. */
4165 if (tls_type
== GOT_TLS_IE_POS
)
4166 contents
[roff
+ 6] = 0x03;
4167 bfd_put_32 (output_bfd
,
4168 htab
->elf
.sgot
->output_section
->vma
4169 + htab
->elf
.sgot
->output_offset
+ off
4170 - htab
->elf
.sgotplt
->output_section
->vma
4171 - htab
->elf
.sgotplt
->output_offset
,
4172 contents
+ roff
+ 8);
4173 /* Skip R_386_PLT32. */
4177 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4179 /* GDesc -> IE transition.
4180 It's originally something like:
4181 leal x@tlsdesc(%ebx), %eax
4184 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4186 movl x@gottpoff(%ebx), %eax # before negl %eax
4188 Registers other than %eax may be set up here. */
4192 /* First, make sure it's a leal adding ebx to a 32-bit
4193 offset into any register, although it's probably
4194 almost always going to be eax. */
4195 roff
= rel
->r_offset
;
4197 /* Now modify the instruction as appropriate. */
4198 /* To turn a leal into a movl in the form we use it, it
4199 suffices to change the first byte from 0x8d to 0x8b.
4200 aoliva FIXME: should we decide to keep the leal, all
4201 we have to do is remove the statement below, and
4202 adjust the relaxation of R_386_TLS_DESC_CALL. */
4203 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4205 if (tls_type
== GOT_TLS_IE_BOTH
)
4208 bfd_put_32 (output_bfd
,
4209 htab
->elf
.sgot
->output_section
->vma
4210 + htab
->elf
.sgot
->output_offset
+ off
4211 - htab
->elf
.sgotplt
->output_section
->vma
4212 - htab
->elf
.sgotplt
->output_offset
,
4216 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4218 /* GDesc -> IE transition.
4226 depending on how we transformed the TLS_GOTDESC above.
4231 roff
= rel
->r_offset
;
4233 /* Now modify the instruction as appropriate. */
4234 if (tls_type
!= GOT_TLS_IE_NEG
)
4237 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4238 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4243 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4244 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4254 if (! elf_i386_tls_transition (info
, input_bfd
,
4255 input_section
, contents
,
4256 symtab_hdr
, sym_hashes
,
4257 &r_type
, GOT_UNKNOWN
, rel
,
4258 relend
, h
, r_symndx
))
4261 if (r_type
!= R_386_TLS_LDM
)
4263 /* LD->LE transition:
4264 leal foo(%reg), %eax; call ___tls_get_addr.
4266 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4267 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4268 memcpy (contents
+ rel
->r_offset
- 2,
4269 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4270 /* Skip R_386_PC32/R_386_PLT32. */
4275 if (htab
->elf
.sgot
== NULL
)
4278 off
= htab
->tls_ldm_got
.offset
;
4283 Elf_Internal_Rela outrel
;
4285 if (htab
->elf
.srelgot
== NULL
)
4288 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4289 + htab
->elf
.sgot
->output_offset
+ off
);
4291 bfd_put_32 (output_bfd
, 0,
4292 htab
->elf
.sgot
->contents
+ off
);
4293 bfd_put_32 (output_bfd
, 0,
4294 htab
->elf
.sgot
->contents
+ off
+ 4);
4295 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4296 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4297 htab
->tls_ldm_got
.offset
|= 1;
4299 relocation
= htab
->elf
.sgot
->output_section
->vma
4300 + htab
->elf
.sgot
->output_offset
+ off
4301 - htab
->elf
.sgotplt
->output_section
->vma
4302 - htab
->elf
.sgotplt
->output_offset
;
4303 unresolved_reloc
= FALSE
;
4306 case R_386_TLS_LDO_32
:
4307 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4308 relocation
-= elf_i386_dtpoff_base (info
);
4310 /* When converting LDO to LE, we must negate. */
4311 relocation
= -elf_i386_tpoff (info
, relocation
);
4314 case R_386_TLS_LE_32
:
4316 if (!info
->executable
)
4318 Elf_Internal_Rela outrel
;
4321 outrel
.r_offset
= rel
->r_offset
4322 + input_section
->output_section
->vma
4323 + input_section
->output_offset
;
4324 if (h
!= NULL
&& h
->dynindx
!= -1)
4328 if (r_type
== R_386_TLS_LE_32
)
4329 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4331 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4332 sreloc
= elf_section_data (input_section
)->sreloc
;
4335 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4338 else if (r_type
== R_386_TLS_LE_32
)
4339 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4341 relocation
-= elf_i386_dtpoff_base (info
);
4343 else if (r_type
== R_386_TLS_LE_32
)
4344 relocation
= elf_i386_tpoff (info
, relocation
);
4346 relocation
= -elf_i386_tpoff (info
, relocation
);
4353 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4354 because such sections are not SEC_ALLOC and thus ld.so will
4355 not process them. */
4356 if (unresolved_reloc
4357 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4359 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4360 rel
->r_offset
) != (bfd_vma
) -1)
4362 (*_bfd_error_handler
)
4363 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4366 (long) rel
->r_offset
,
4368 h
->root
.root
.string
);
4373 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4374 contents
, rel
->r_offset
,
4377 check_relocation_error
:
4378 if (r
!= bfd_reloc_ok
)
4383 name
= h
->root
.root
.string
;
4386 name
= bfd_elf_string_from_elf_section (input_bfd
,
4387 symtab_hdr
->sh_link
,
4392 name
= bfd_section_name (input_bfd
, sec
);
4395 if (r
== bfd_reloc_overflow
)
4397 if (! ((*info
->callbacks
->reloc_overflow
)
4398 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4399 (bfd_vma
) 0, input_bfd
, input_section
,
4405 (*_bfd_error_handler
)
4406 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4407 input_bfd
, input_section
,
4408 (long) rel
->r_offset
, name
, (int) r
);
4417 /* Finish up dynamic symbol handling. We set the contents of various
4418 dynamic sections here. */
4421 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4422 struct bfd_link_info
*info
,
4423 struct elf_link_hash_entry
*h
,
4424 Elf_Internal_Sym
*sym
)
4426 struct elf_i386_link_hash_table
*htab
;
4427 unsigned plt_entry_size
;
4428 const struct elf_i386_backend_data
*abed
;
4430 htab
= elf_i386_hash_table (info
);
4434 abed
= get_elf_i386_backend_data (output_bfd
);
4435 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4437 if (h
->plt
.offset
!= (bfd_vma
) -1)
4441 Elf_Internal_Rela rel
;
4443 asection
*plt
, *gotplt
, *relplt
;
4445 /* When building a static executable, use .iplt, .igot.plt and
4446 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4447 if (htab
->elf
.splt
!= NULL
)
4449 plt
= htab
->elf
.splt
;
4450 gotplt
= htab
->elf
.sgotplt
;
4451 relplt
= htab
->elf
.srelplt
;
4455 plt
= htab
->elf
.iplt
;
4456 gotplt
= htab
->elf
.igotplt
;
4457 relplt
= htab
->elf
.irelplt
;
4460 /* This symbol has an entry in the procedure linkage table. Set
4463 if ((h
->dynindx
== -1
4464 && !((h
->forced_local
|| info
->executable
)
4466 && h
->type
== STT_GNU_IFUNC
))
4472 /* Get the index in the procedure linkage table which
4473 corresponds to this symbol. This is the index of this symbol
4474 in all the symbols for which we are making plt entries. The
4475 first entry in the procedure linkage table is reserved.
4477 Get the offset into the .got table of the entry that
4478 corresponds to this function. Each .got entry is 4 bytes.
4479 The first three are reserved.
4481 For static executables, we don't reserve anything. */
4483 if (plt
== htab
->elf
.splt
)
4485 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4486 got_offset
= (got_offset
+ 3) * 4;
4490 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4491 got_offset
= got_offset
* 4;
4494 /* Fill in the entry in the procedure linkage table. */
4497 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4498 abed
->plt
->plt_entry_size
);
4499 bfd_put_32 (output_bfd
,
4500 (gotplt
->output_section
->vma
4501 + gotplt
->output_offset
4503 plt
->contents
+ h
->plt
.offset
4504 + abed
->plt
->plt_got_offset
);
4506 if (abed
->is_vxworks
)
4508 int s
, k
, reloc_index
;
4510 /* Create the R_386_32 relocation referencing the GOT
4511 for this PLT entry. */
4513 /* S: Current slot number (zero-based). */
4514 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4515 / abed
->plt
->plt_entry_size
);
4516 /* K: Number of relocations for PLTResolve. */
4518 k
= PLTRESOLVE_RELOCS_SHLIB
;
4520 k
= PLTRESOLVE_RELOCS
;
4521 /* Skip the PLTresolve relocations, and the relocations for
4522 the other PLT slots. */
4523 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4524 loc
= (htab
->srelplt2
->contents
+ reloc_index
4525 * sizeof (Elf32_External_Rel
));
4527 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4528 + htab
->elf
.splt
->output_offset
4529 + h
->plt
.offset
+ 2),
4530 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4531 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4533 /* Create the R_386_32 relocation referencing the beginning of
4534 the PLT for this GOT entry. */
4535 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4536 + htab
->elf
.sgotplt
->output_offset
4538 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4539 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4540 loc
+ sizeof (Elf32_External_Rel
));
4545 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4546 abed
->plt
->plt_entry_size
);
4547 bfd_put_32 (output_bfd
, got_offset
,
4548 plt
->contents
+ h
->plt
.offset
4549 + abed
->plt
->plt_got_offset
);
4552 /* Fill in the entry in the global offset table. */
4553 bfd_put_32 (output_bfd
,
4554 (plt
->output_section
->vma
4555 + plt
->output_offset
4557 + abed
->plt
->plt_lazy_offset
),
4558 gotplt
->contents
+ got_offset
);
4560 /* Fill in the entry in the .rel.plt section. */
4561 rel
.r_offset
= (gotplt
->output_section
->vma
4562 + gotplt
->output_offset
4564 if (h
->dynindx
== -1
4565 || ((info
->executable
4566 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4568 && h
->type
== STT_GNU_IFUNC
))
4570 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4571 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4572 in the .got.plt section. */
4573 bfd_put_32 (output_bfd
,
4574 (h
->root
.u
.def
.value
4575 + h
->root
.u
.def
.section
->output_section
->vma
4576 + h
->root
.u
.def
.section
->output_offset
),
4577 gotplt
->contents
+ got_offset
);
4578 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4579 /* R_386_IRELATIVE comes last. */
4580 plt_index
= htab
->next_irelative_index
--;
4584 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4585 plt_index
= htab
->next_jump_slot_index
++;
4587 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4588 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4590 /* Don't fill PLT entry for static executables. */
4591 if (plt
== htab
->elf
.splt
)
4593 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4594 plt
->contents
+ h
->plt
.offset
4595 + abed
->plt
->plt_reloc_offset
);
4596 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4597 + abed
->plt
->plt_plt_offset
+ 4),
4598 plt
->contents
+ h
->plt
.offset
4599 + abed
->plt
->plt_plt_offset
);
4602 if (!h
->def_regular
)
4604 /* Mark the symbol as undefined, rather than as defined in
4605 the .plt section. Leave the value if there were any
4606 relocations where pointer equality matters (this is a clue
4607 for the dynamic linker, to make function pointer
4608 comparisons work between an application and shared
4609 library), otherwise set it to zero. If a function is only
4610 called from a binary, there is no need to slow down
4611 shared libraries because of that. */
4612 sym
->st_shndx
= SHN_UNDEF
;
4613 if (!h
->pointer_equality_needed
)
4618 if (h
->got
.offset
!= (bfd_vma
) -1
4619 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4620 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4622 Elf_Internal_Rela rel
;
4624 /* This symbol has an entry in the global offset table. Set it
4627 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4630 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4631 + htab
->elf
.sgot
->output_offset
4632 + (h
->got
.offset
& ~(bfd_vma
) 1));
4634 /* If this is a static link, or it is a -Bsymbolic link and the
4635 symbol is defined locally or was forced to be local because
4636 of a version file, we just want to emit a RELATIVE reloc.
4637 The entry in the global offset table will already have been
4638 initialized in the relocate_section function. */
4640 && h
->type
== STT_GNU_IFUNC
)
4644 /* Generate R_386_GLOB_DAT. */
4651 if (!h
->pointer_equality_needed
)
4654 /* For non-shared object, we can't use .got.plt, which
4655 contains the real function addres if we need pointer
4656 equality. We load the GOT entry with the PLT entry. */
4657 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4658 bfd_put_32 (output_bfd
,
4659 (plt
->output_section
->vma
4660 + plt
->output_offset
+ h
->plt
.offset
),
4661 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4665 else if (info
->shared
4666 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4668 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4669 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4673 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4675 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4676 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4677 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4680 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4685 Elf_Internal_Rela rel
;
4687 /* This symbol needs a copy reloc. Set it up. */
4689 if (h
->dynindx
== -1
4690 || (h
->root
.type
!= bfd_link_hash_defined
4691 && h
->root
.type
!= bfd_link_hash_defweak
)
4692 || htab
->srelbss
== NULL
)
4695 rel
.r_offset
= (h
->root
.u
.def
.value
4696 + h
->root
.u
.def
.section
->output_section
->vma
4697 + h
->root
.u
.def
.section
->output_offset
);
4698 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4699 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4705 /* Finish up local dynamic symbol handling. We set the contents of
4706 various dynamic sections here. */
4709 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4711 struct elf_link_hash_entry
*h
4712 = (struct elf_link_hash_entry
*) *slot
;
4713 struct bfd_link_info
*info
4714 = (struct bfd_link_info
*) inf
;
4716 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4720 /* Used to decide how to sort relocs in an optimal manner for the
4721 dynamic linker, before writing them out. */
4723 static enum elf_reloc_type_class
4724 elf_i386_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
4725 const asection
*rel_sec ATTRIBUTE_UNUSED
,
4726 const Elf_Internal_Rela
*rela
)
4728 switch (ELF32_R_TYPE (rela
->r_info
))
4730 case R_386_RELATIVE
:
4731 return reloc_class_relative
;
4732 case R_386_JUMP_SLOT
:
4733 return reloc_class_plt
;
4735 return reloc_class_copy
;
4737 return reloc_class_normal
;
4741 /* Finish up the dynamic sections. */
4744 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4745 struct bfd_link_info
*info
)
4747 struct elf_i386_link_hash_table
*htab
;
4750 const struct elf_i386_backend_data
*abed
;
4752 htab
= elf_i386_hash_table (info
);
4756 dynobj
= htab
->elf
.dynobj
;
4757 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4758 abed
= get_elf_i386_backend_data (output_bfd
);
4760 if (htab
->elf
.dynamic_sections_created
)
4762 Elf32_External_Dyn
*dyncon
, *dynconend
;
4764 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4767 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4768 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4769 for (; dyncon
< dynconend
; dyncon
++)
4771 Elf_Internal_Dyn dyn
;
4774 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4779 if (abed
->is_vxworks
4780 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4785 s
= htab
->elf
.sgotplt
;
4786 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4790 s
= htab
->elf
.srelplt
;
4791 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4795 s
= htab
->elf
.srelplt
;
4796 dyn
.d_un
.d_val
= s
->size
;
4800 /* My reading of the SVR4 ABI indicates that the
4801 procedure linkage table relocs (DT_JMPREL) should be
4802 included in the overall relocs (DT_REL). This is
4803 what Solaris does. However, UnixWare can not handle
4804 that case. Therefore, we override the DT_RELSZ entry
4805 here to make it not include the JMPREL relocs. */
4806 s
= htab
->elf
.srelplt
;
4809 dyn
.d_un
.d_val
-= s
->size
;
4813 /* We may not be using the standard ELF linker script.
4814 If .rel.plt is the first .rel section, we adjust
4815 DT_REL to not include it. */
4816 s
= htab
->elf
.srelplt
;
4819 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4821 dyn
.d_un
.d_ptr
+= s
->size
;
4825 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4828 /* Fill in the first entry in the procedure linkage table. */
4829 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4833 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4834 abed
->plt
->plt0_entry_size
);
4835 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4836 abed
->plt0_pad_byte
,
4837 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4841 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4842 abed
->plt
->plt0_entry_size
);
4843 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4844 abed
->plt0_pad_byte
,
4845 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4846 bfd_put_32 (output_bfd
,
4847 (htab
->elf
.sgotplt
->output_section
->vma
4848 + htab
->elf
.sgotplt
->output_offset
4850 htab
->elf
.splt
->contents
4851 + abed
->plt
->plt0_got1_offset
);
4852 bfd_put_32 (output_bfd
,
4853 (htab
->elf
.sgotplt
->output_section
->vma
4854 + htab
->elf
.sgotplt
->output_offset
4856 htab
->elf
.splt
->contents
4857 + abed
->plt
->plt0_got2_offset
);
4859 if (abed
->is_vxworks
)
4861 Elf_Internal_Rela rel
;
4863 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4864 On IA32 we use REL relocations so the addend goes in
4865 the PLT directly. */
4866 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4867 + htab
->elf
.splt
->output_offset
4868 + abed
->plt
->plt0_got1_offset
);
4869 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4870 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4871 htab
->srelplt2
->contents
);
4872 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4873 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4874 + htab
->elf
.splt
->output_offset
4875 + abed
->plt
->plt0_got2_offset
);
4876 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4877 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4878 htab
->srelplt2
->contents
+
4879 sizeof (Elf32_External_Rel
));
4883 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4884 really seem like the right value. */
4885 elf_section_data (htab
->elf
.splt
->output_section
)
4886 ->this_hdr
.sh_entsize
= 4;
4888 /* Correct the .rel.plt.unloaded relocations. */
4889 if (abed
->is_vxworks
&& !info
->shared
)
4891 int num_plts
= (htab
->elf
.splt
->size
4892 / abed
->plt
->plt_entry_size
) - 1;
4895 p
= htab
->srelplt2
->contents
;
4897 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4899 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4901 for (; num_plts
; num_plts
--)
4903 Elf_Internal_Rela rel
;
4904 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4905 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4906 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4907 p
+= sizeof (Elf32_External_Rel
);
4909 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4910 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4911 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4912 p
+= sizeof (Elf32_External_Rel
);
4918 if (htab
->elf
.sgotplt
)
4920 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4922 (*_bfd_error_handler
)
4923 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4927 /* Fill in the first three entries in the global offset table. */
4928 if (htab
->elf
.sgotplt
->size
> 0)
4930 bfd_put_32 (output_bfd
,
4932 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4933 htab
->elf
.sgotplt
->contents
);
4934 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4935 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4938 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4941 /* Adjust .eh_frame for .plt section. */
4942 if (htab
->plt_eh_frame
!= NULL
4943 && htab
->plt_eh_frame
->contents
!= NULL
)
4945 if (htab
->elf
.splt
!= NULL
4946 && htab
->elf
.splt
->size
!= 0
4947 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4948 && htab
->elf
.splt
->output_section
!= NULL
4949 && htab
->plt_eh_frame
->output_section
!= NULL
)
4951 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4952 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4953 + htab
->plt_eh_frame
->output_offset
4954 + PLT_FDE_START_OFFSET
;
4955 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4956 htab
->plt_eh_frame
->contents
4957 + PLT_FDE_START_OFFSET
);
4959 if (htab
->plt_eh_frame
->sec_info_type
4960 == SEC_INFO_TYPE_EH_FRAME
)
4962 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4964 htab
->plt_eh_frame
->contents
))
4969 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4970 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4972 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4973 htab_traverse (htab
->loc_hash_table
,
4974 elf_i386_finish_local_dynamic_symbol
,
4980 /* Return address for Ith PLT stub in section PLT, for relocation REL
4981 or (bfd_vma) -1 if it should not be included. */
4984 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4985 const arelent
*rel ATTRIBUTE_UNUSED
)
4987 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4990 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4993 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
4995 if (h
->plt
.offset
!= (bfd_vma
) -1
4997 && !h
->pointer_equality_needed
)
5000 return _bfd_elf_hash_symbol (h
);
5003 /* Hook called by the linker routine which adds symbols from an object
5007 elf_i386_add_symbol_hook (bfd
* abfd
,
5008 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5009 Elf_Internal_Sym
* sym
,
5010 const char ** namep ATTRIBUTE_UNUSED
,
5011 flagword
* flagsp ATTRIBUTE_UNUSED
,
5012 asection
** secp ATTRIBUTE_UNUSED
,
5013 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5015 if ((abfd
->flags
& DYNAMIC
) == 0
5016 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5017 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5018 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5023 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5024 #define TARGET_LITTLE_NAME "elf32-i386"
5025 #define ELF_ARCH bfd_arch_i386
5026 #define ELF_TARGET_ID I386_ELF_DATA
5027 #define ELF_MACHINE_CODE EM_386
5028 #define ELF_MAXPAGESIZE 0x1000
5030 #define elf_backend_can_gc_sections 1
5031 #define elf_backend_can_refcount 1
5032 #define elf_backend_want_got_plt 1
5033 #define elf_backend_plt_readonly 1
5034 #define elf_backend_want_plt_sym 0
5035 #define elf_backend_got_header_size 12
5036 #define elf_backend_plt_alignment 4
5038 /* Support RELA for objdump of prelink objects. */
5039 #define elf_info_to_howto elf_i386_info_to_howto_rel
5040 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5042 #define bfd_elf32_mkobject elf_i386_mkobject
5044 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5045 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5046 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5047 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5048 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5050 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5051 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5052 #define elf_backend_check_relocs elf_i386_check_relocs
5053 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5054 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5055 #define elf_backend_fake_sections elf_i386_fake_sections
5056 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5057 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5058 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5059 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5060 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5061 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5062 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5063 #define elf_backend_relocate_section elf_i386_relocate_section
5064 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5065 #define elf_backend_always_size_sections elf_i386_always_size_sections
5066 #define elf_backend_omit_section_dynsym \
5067 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5068 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5069 #define elf_backend_hash_symbol elf_i386_hash_symbol
5070 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5071 #undef elf_backend_post_process_headers
5072 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5074 #include "elf32-target.h"
5076 /* FreeBSD support. */
5078 #undef TARGET_LITTLE_SYM
5079 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5080 #undef TARGET_LITTLE_NAME
5081 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5083 #define ELF_OSABI ELFOSABI_FREEBSD
5085 /* The kernel recognizes executables as valid only if they carry a
5086 "FreeBSD" label in the ELF header. So we put this label on all
5087 executables and (for simplicity) also all other object files. */
5090 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5092 _bfd_elf_set_osabi (abfd
, info
);
5094 #ifdef OLD_FREEBSD_ABI_LABEL
5095 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5096 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5100 #undef elf_backend_post_process_headers
5101 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5103 #define elf32_bed elf32_i386_fbsd_bed
5105 #undef elf_backend_add_symbol_hook
5107 #include "elf32-target.h"
5111 #undef TARGET_LITTLE_SYM
5112 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5113 #undef TARGET_LITTLE_NAME
5114 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5116 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5117 objects won't be recognized. */
5121 #define elf32_bed elf32_i386_sol2_bed
5123 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5125 #undef elf_backend_static_tls_alignment
5126 #define elf_backend_static_tls_alignment 8
5128 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5130 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5132 #undef elf_backend_want_plt_sym
5133 #define elf_backend_want_plt_sym 1
5135 #include "elf32-target.h"
5137 /* Native Client support. */
5139 #undef TARGET_LITTLE_SYM
5140 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5141 #undef TARGET_LITTLE_NAME
5142 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5144 #define elf32_bed elf32_i386_nacl_bed
5146 #undef ELF_MAXPAGESIZE
5147 #define ELF_MAXPAGESIZE 0x10000
5149 /* Restore defaults. */
5151 #undef elf_backend_want_plt_sym
5152 #define elf_backend_want_plt_sym 0
5153 #undef elf_backend_post_process_headers
5154 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5155 #undef elf_backend_static_tls_alignment
5157 /* NaCl uses substantially different PLT entries for the same effects. */
5159 #undef elf_backend_plt_alignment
5160 #define elf_backend_plt_alignment 5
5161 #define NACL_PLT_ENTRY_SIZE 64
5162 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5164 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5166 0xff, 0x35, /* pushl contents of address */
5167 0, 0, 0, 0, /* replaced with address of .got + 4. */
5168 0x8b, 0x0d, /* movl contents of address, %ecx */
5169 0, 0, 0, 0, /* replaced with address of .got + 8. */
5170 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5171 0xff, 0xe1 /* jmp *%ecx */
5174 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5176 0x8b, 0x0d, /* movl contents of address, %ecx */
5177 0, 0, 0, 0, /* replaced with GOT slot address. */
5178 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5179 0xff, 0xe1, /* jmp *%ecx */
5181 /* Pad to the next 32-byte boundary with nop instructions. */
5183 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5184 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5186 /* Lazy GOT entries point here (32-byte aligned). */
5187 0x68, /* pushl immediate */
5188 0, 0, 0, 0, /* replaced with reloc offset. */
5189 0xe9, /* jmp relative */
5190 0, 0, 0, 0, /* replaced with offset to .plt. */
5192 /* Pad to the next 32-byte boundary with nop instructions. */
5193 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5194 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5198 static const bfd_byte
5199 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5201 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5202 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5203 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5204 0xff, 0xe1, /* jmp *%ecx */
5206 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5207 so pad to that size with nop instructions. */
5208 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5211 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5213 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5214 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5215 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5216 0xff, 0xe1, /* jmp *%ecx */
5218 /* Pad to the next 32-byte boundary with nop instructions. */
5220 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5221 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5223 /* Lazy GOT entries point here (32-byte aligned). */
5224 0x68, /* pushl immediate */
5225 0, 0, 0, 0, /* replaced with offset into relocation table. */
5226 0xe9, /* jmp relative */
5227 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5229 /* Pad to the next 32-byte boundary with nop instructions. */
5230 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5231 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5235 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5237 #if (PLT_CIE_LENGTH != 20 \
5238 || PLT_FDE_LENGTH != 36 \
5239 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5240 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5241 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5243 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5244 0, 0, 0, 0, /* CIE ID */
5245 1, /* CIE version */
5246 'z', 'R', 0, /* Augmentation string */
5247 1, /* Code alignment factor */
5248 0x7c, /* Data alignment factor: -4 */
5249 8, /* Return address column */
5250 1, /* Augmentation size */
5251 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5252 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5253 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5254 DW_CFA_nop
, DW_CFA_nop
,
5256 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5257 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5258 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5259 0, 0, 0, 0, /* .plt size goes here */
5260 0, /* Augmentation size */
5261 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5262 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5263 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5264 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5265 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5266 13, /* Block length */
5267 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5268 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5269 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5270 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5271 DW_CFA_nop
, DW_CFA_nop
5274 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5276 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5277 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5278 2, /* plt0_got1_offset */
5279 8, /* plt0_got2_offset */
5280 elf_i386_nacl_plt_entry
, /* plt_entry */
5281 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5282 2, /* plt_got_offset */
5283 33, /* plt_reloc_offset */
5284 38, /* plt_plt_offset */
5285 32, /* plt_lazy_offset */
5286 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5287 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5288 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5289 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5292 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5294 &elf_i386_nacl_plt
, /* plt */
5295 0x90, /* plt0_pad_byte: nop insn */
5300 elf32_i386_nacl_elf_object_p (bfd
*abfd
)
5302 /* Set the right machine number for a NaCl i386 ELF32 file. */
5303 bfd_default_set_arch_mach (abfd
, bfd_arch_i386
, bfd_mach_i386_i386_nacl
);
5307 #undef elf_backend_arch_data
5308 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5310 #undef elf_backend_object_p
5311 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
5312 #undef elf_backend_modify_segment_map
5313 #define elf_backend_modify_segment_map nacl_modify_segment_map
5314 #undef elf_backend_modify_program_headers
5315 #define elf_backend_modify_program_headers nacl_modify_program_headers
5316 #undef elf_backend_final_write_processing
5317 #define elf_backend_final_write_processing nacl_final_write_processing
5319 #include "elf32-target.h"
5321 /* Restore defaults. */
5322 #undef elf_backend_object_p
5323 #undef elf_backend_modify_segment_map
5324 #undef elf_backend_modify_program_headers
5325 #undef elf_backend_final_write_processing
5327 /* VxWorks support. */
5329 #undef TARGET_LITTLE_SYM
5330 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5331 #undef TARGET_LITTLE_NAME
5332 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5334 #undef elf_backend_plt_alignment
5335 #define elf_backend_plt_alignment 4
5337 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5339 &elf_i386_plt
, /* plt */
5340 0x90, /* plt0_pad_byte */
5344 #undef elf_backend_arch_data
5345 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5347 #undef elf_backend_relocs_compatible
5348 #undef elf_backend_post_process_headers
5349 #undef elf_backend_add_symbol_hook
5350 #define elf_backend_add_symbol_hook \
5351 elf_vxworks_add_symbol_hook
5352 #undef elf_backend_link_output_symbol_hook
5353 #define elf_backend_link_output_symbol_hook \
5354 elf_vxworks_link_output_symbol_hook
5355 #undef elf_backend_emit_relocs
5356 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5357 #undef elf_backend_final_write_processing
5358 #define elf_backend_final_write_processing \
5359 elf_vxworks_final_write_processing
5360 #undef elf_backend_static_tls_alignment
5362 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5364 #undef elf_backend_want_plt_sym
5365 #define elf_backend_want_plt_sym 1
5368 #define elf32_bed elf32_i386_vxworks_bed
5370 #include "elf32-target.h"