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
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_malloc (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
),
955 ret
->plt_eh_frame
= NULL
;
956 ret
->tls_ldm_got
.refcount
= 0;
957 ret
->next_tls_desc_index
= 0;
958 ret
->sgotplt_jump_table_size
= 0;
959 ret
->sym_cache
.abfd
= NULL
;
960 ret
->srelplt2
= NULL
;
961 ret
->tls_module_base
= NULL
;
962 ret
->next_jump_slot_index
= 0;
963 ret
->next_irelative_index
= 0;
965 ret
->loc_hash_table
= htab_try_create (1024,
966 elf_i386_local_htab_hash
,
967 elf_i386_local_htab_eq
,
969 ret
->loc_hash_memory
= objalloc_create ();
970 if (!ret
->loc_hash_table
|| !ret
->loc_hash_memory
)
976 return &ret
->elf
.root
;
979 /* Destroy an i386 ELF linker hash table. */
982 elf_i386_link_hash_table_free (struct bfd_link_hash_table
*hash
)
984 struct elf_i386_link_hash_table
*htab
985 = (struct elf_i386_link_hash_table
*) hash
;
987 if (htab
->loc_hash_table
)
988 htab_delete (htab
->loc_hash_table
);
989 if (htab
->loc_hash_memory
)
990 objalloc_free ((struct objalloc
*) htab
->loc_hash_memory
);
991 _bfd_generic_link_hash_table_free (hash
);
994 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
995 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
999 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
1001 struct elf_i386_link_hash_table
*htab
;
1003 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
1006 htab
= elf_i386_hash_table (info
);
1010 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
1012 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rel.bss");
1015 || (!info
->shared
&& !htab
->srelbss
))
1018 if (get_elf_i386_backend_data (dynobj
)->is_vxworks
1019 && !elf_vxworks_create_dynamic_sections (dynobj
, info
,
1023 if (!info
->no_ld_generated_unwind_info
1024 && htab
->plt_eh_frame
== NULL
1025 && htab
->elf
.splt
!= NULL
)
1027 flagword flags
= (SEC_ALLOC
| SEC_LOAD
| SEC_READONLY
1028 | SEC_HAS_CONTENTS
| SEC_IN_MEMORY
1029 | SEC_LINKER_CREATED
);
1031 = bfd_make_section_anyway_with_flags (dynobj
, ".eh_frame", flags
);
1032 if (htab
->plt_eh_frame
== NULL
1033 || !bfd_set_section_alignment (dynobj
, htab
->plt_eh_frame
, 2))
1040 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1043 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
1044 struct elf_link_hash_entry
*dir
,
1045 struct elf_link_hash_entry
*ind
)
1047 struct elf_i386_link_hash_entry
*edir
, *eind
;
1049 edir
= (struct elf_i386_link_hash_entry
*) dir
;
1050 eind
= (struct elf_i386_link_hash_entry
*) ind
;
1052 if (eind
->dyn_relocs
!= NULL
)
1054 if (edir
->dyn_relocs
!= NULL
)
1056 struct elf_dyn_relocs
**pp
;
1057 struct elf_dyn_relocs
*p
;
1059 /* Add reloc counts against the indirect sym to the direct sym
1060 list. Merge any entries against the same section. */
1061 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
1063 struct elf_dyn_relocs
*q
;
1065 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
1066 if (q
->sec
== p
->sec
)
1068 q
->pc_count
+= p
->pc_count
;
1069 q
->count
+= p
->count
;
1076 *pp
= edir
->dyn_relocs
;
1079 edir
->dyn_relocs
= eind
->dyn_relocs
;
1080 eind
->dyn_relocs
= NULL
;
1083 if (ind
->root
.type
== bfd_link_hash_indirect
1084 && dir
->got
.refcount
<= 0)
1086 edir
->tls_type
= eind
->tls_type
;
1087 eind
->tls_type
= GOT_UNKNOWN
;
1090 if (ELIMINATE_COPY_RELOCS
1091 && ind
->root
.type
!= bfd_link_hash_indirect
1092 && dir
->dynamic_adjusted
)
1094 /* If called to transfer flags for a weakdef during processing
1095 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1096 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1097 dir
->ref_dynamic
|= ind
->ref_dynamic
;
1098 dir
->ref_regular
|= ind
->ref_regular
;
1099 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
1100 dir
->needs_plt
|= ind
->needs_plt
;
1101 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
1104 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
1107 /* Return TRUE if the TLS access code sequence support transition
1111 elf_i386_check_tls_transition (bfd
*abfd
, asection
*sec
,
1113 Elf_Internal_Shdr
*symtab_hdr
,
1114 struct elf_link_hash_entry
**sym_hashes
,
1115 unsigned int r_type
,
1116 const Elf_Internal_Rela
*rel
,
1117 const Elf_Internal_Rela
*relend
)
1119 unsigned int val
, type
;
1120 unsigned long r_symndx
;
1121 struct elf_link_hash_entry
*h
;
1124 /* Get the section contents. */
1125 if (contents
== NULL
)
1127 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
1128 contents
= elf_section_data (sec
)->this_hdr
.contents
;
1131 /* FIXME: How to better handle error condition? */
1132 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
1135 /* Cache the section contents for elf_link_input_bfd. */
1136 elf_section_data (sec
)->this_hdr
.contents
= contents
;
1140 offset
= rel
->r_offset
;
1145 if (offset
< 2 || (rel
+ 1) >= relend
)
1148 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1149 if (r_type
== R_386_TLS_GD
)
1151 /* Check transition from GD access model. Only
1152 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1153 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1154 can transit to different access model. */
1155 if ((offset
+ 10) > sec
->size
||
1156 (type
!= 0x8d && type
!= 0x04))
1159 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1162 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1166 if (bfd_get_8 (abfd
, contents
+ offset
- 3) != 0x8d)
1169 if ((val
& 0xc7) != 0x05 || val
== (4 << 3))
1174 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1175 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1178 if (bfd_get_8 (abfd
, contents
+ offset
+ 9) != 0x90)
1184 /* Check transition from LD access model. Only
1185 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1186 can transit to different access model. */
1187 if (type
!= 0x8d || (offset
+ 9) > sec
->size
)
1190 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1191 if ((val
& 0xf8) != 0x80 || (val
& 7) == 4)
1195 if (bfd_get_8 (abfd
, contents
+ offset
+ 4) != 0xe8)
1198 r_symndx
= ELF32_R_SYM (rel
[1].r_info
);
1199 if (r_symndx
< symtab_hdr
->sh_info
)
1202 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1203 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1204 may be versioned. */
1206 && h
->root
.root
.string
!= NULL
1207 && (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PC32
1208 || ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
)
1209 && (strncmp (h
->root
.root
.string
, "___tls_get_addr",
1213 /* Check transition from IE access model:
1214 movl foo@indntpoff(%rip), %eax
1215 movl foo@indntpoff(%rip), %reg
1216 addl foo@indntpoff(%rip), %reg
1219 if (offset
< 1 || (offset
+ 4) > sec
->size
)
1222 /* Check "movl foo@tpoff(%rip), %eax" first. */
1223 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1230 /* Check movl|addl foo@tpoff(%rip), %reg. */
1231 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1232 return ((type
== 0x8b || type
== 0x03)
1233 && (val
& 0xc7) == 0x05);
1235 case R_386_TLS_GOTIE
:
1236 case R_386_TLS_IE_32
:
1237 /* Check transition from {IE_32,GOTIE} access model:
1238 subl foo@{tpoff,gontoff}(%reg1), %reg2
1239 movl foo@{tpoff,gontoff}(%reg1), %reg2
1240 addl foo@{tpoff,gontoff}(%reg1), %reg2
1243 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1246 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1247 if ((val
& 0xc0) != 0x80 || (val
& 7) == 4)
1250 type
= bfd_get_8 (abfd
, contents
+ offset
- 2);
1251 return type
== 0x8b || type
== 0x2b || type
== 0x03;
1253 case R_386_TLS_GOTDESC
:
1254 /* Check transition from GDesc access model:
1255 leal x@tlsdesc(%ebx), %eax
1257 Make sure it's a leal adding ebx to a 32-bit offset
1258 into any register, although it's probably almost always
1261 if (offset
< 2 || (offset
+ 4) > sec
->size
)
1264 if (bfd_get_8 (abfd
, contents
+ offset
- 2) != 0x8d)
1267 val
= bfd_get_8 (abfd
, contents
+ offset
- 1);
1268 return (val
& 0xc7) == 0x83;
1270 case R_386_TLS_DESC_CALL
:
1271 /* Check transition from GDesc access model:
1272 call *x@tlsdesc(%rax)
1274 if (offset
+ 2 <= sec
->size
)
1276 /* Make sure that it's a call *x@tlsdesc(%rax). */
1277 static const unsigned char call
[] = { 0xff, 0x10 };
1278 return memcmp (contents
+ offset
, call
, 2) == 0;
1288 /* Return TRUE if the TLS access transition is OK or no transition
1289 will be performed. Update R_TYPE if there is a transition. */
1292 elf_i386_tls_transition (struct bfd_link_info
*info
, bfd
*abfd
,
1293 asection
*sec
, bfd_byte
*contents
,
1294 Elf_Internal_Shdr
*symtab_hdr
,
1295 struct elf_link_hash_entry
**sym_hashes
,
1296 unsigned int *r_type
, int tls_type
,
1297 const Elf_Internal_Rela
*rel
,
1298 const Elf_Internal_Rela
*relend
,
1299 struct elf_link_hash_entry
*h
,
1300 unsigned long r_symndx
)
1302 unsigned int from_type
= *r_type
;
1303 unsigned int to_type
= from_type
;
1304 bfd_boolean check
= TRUE
;
1306 /* Skip TLS transition for functions. */
1308 && (h
->type
== STT_FUNC
1309 || h
->type
== STT_GNU_IFUNC
))
1315 case R_386_TLS_GOTDESC
:
1316 case R_386_TLS_DESC_CALL
:
1317 case R_386_TLS_IE_32
:
1319 case R_386_TLS_GOTIE
:
1320 if (info
->executable
)
1323 to_type
= R_386_TLS_LE_32
;
1324 else if (from_type
!= R_386_TLS_IE
1325 && from_type
!= R_386_TLS_GOTIE
)
1326 to_type
= R_386_TLS_IE_32
;
1329 /* When we are called from elf_i386_relocate_section, CONTENTS
1330 isn't NULL and there may be additional transitions based on
1332 if (contents
!= NULL
)
1334 unsigned int new_to_type
= to_type
;
1336 if (info
->executable
1339 && (tls_type
& GOT_TLS_IE
))
1340 new_to_type
= R_386_TLS_LE_32
;
1342 if (to_type
== R_386_TLS_GD
1343 || to_type
== R_386_TLS_GOTDESC
1344 || to_type
== R_386_TLS_DESC_CALL
)
1346 if (tls_type
== GOT_TLS_IE_POS
)
1347 new_to_type
= R_386_TLS_GOTIE
;
1348 else if (tls_type
& GOT_TLS_IE
)
1349 new_to_type
= R_386_TLS_IE_32
;
1352 /* We checked the transition before when we were called from
1353 elf_i386_check_relocs. We only want to check the new
1354 transition which hasn't been checked before. */
1355 check
= new_to_type
!= to_type
&& from_type
== to_type
;
1356 to_type
= new_to_type
;
1362 if (info
->executable
)
1363 to_type
= R_386_TLS_LE_32
;
1370 /* Return TRUE if there is no transition. */
1371 if (from_type
== to_type
)
1374 /* Check if the transition can be performed. */
1376 && ! elf_i386_check_tls_transition (abfd
, sec
, contents
,
1377 symtab_hdr
, sym_hashes
,
1378 from_type
, rel
, relend
))
1380 reloc_howto_type
*from
, *to
;
1383 from
= elf_i386_rtype_to_howto (abfd
, from_type
);
1384 to
= elf_i386_rtype_to_howto (abfd
, to_type
);
1387 name
= h
->root
.root
.string
;
1390 struct elf_i386_link_hash_table
*htab
;
1392 htab
= elf_i386_hash_table (info
);
1397 Elf_Internal_Sym
*isym
;
1399 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1401 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
, NULL
);
1405 (*_bfd_error_handler
)
1406 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1407 "in section `%A' failed"),
1408 abfd
, sec
, from
->name
, to
->name
, name
,
1409 (unsigned long) rel
->r_offset
);
1410 bfd_set_error (bfd_error_bad_value
);
1418 /* Look through the relocs for a section during the first phase, and
1419 calculate needed space in the global offset table, procedure linkage
1420 table, and dynamic reloc sections. */
1423 elf_i386_check_relocs (bfd
*abfd
,
1424 struct bfd_link_info
*info
,
1426 const Elf_Internal_Rela
*relocs
)
1428 struct elf_i386_link_hash_table
*htab
;
1429 Elf_Internal_Shdr
*symtab_hdr
;
1430 struct elf_link_hash_entry
**sym_hashes
;
1431 const Elf_Internal_Rela
*rel
;
1432 const Elf_Internal_Rela
*rel_end
;
1435 if (info
->relocatable
)
1438 BFD_ASSERT (is_i386_elf (abfd
));
1440 htab
= elf_i386_hash_table (info
);
1444 symtab_hdr
= &elf_symtab_hdr (abfd
);
1445 sym_hashes
= elf_sym_hashes (abfd
);
1449 rel_end
= relocs
+ sec
->reloc_count
;
1450 for (rel
= relocs
; rel
< rel_end
; rel
++)
1452 unsigned int r_type
;
1453 unsigned long r_symndx
;
1454 struct elf_link_hash_entry
*h
;
1455 Elf_Internal_Sym
*isym
;
1457 bfd_boolean size_reloc
;
1459 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1460 r_type
= ELF32_R_TYPE (rel
->r_info
);
1462 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
1464 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
1470 if (r_symndx
< symtab_hdr
->sh_info
)
1472 /* A local symbol. */
1473 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1478 /* Check relocation against local STT_GNU_IFUNC symbol. */
1479 if (ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1481 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, TRUE
);
1485 /* Fake a STT_GNU_IFUNC symbol. */
1486 h
->type
= STT_GNU_IFUNC
;
1489 h
->forced_local
= 1;
1490 h
->root
.type
= bfd_link_hash_defined
;
1498 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1499 while (h
->root
.type
== bfd_link_hash_indirect
1500 || h
->root
.type
== bfd_link_hash_warning
)
1501 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1506 /* Create the ifunc sections for static executables. If we
1507 never see an indirect function symbol nor we are building
1508 a static executable, those sections will be empty and
1509 won't appear in output. */
1520 if (htab
->elf
.dynobj
== NULL
)
1521 htab
->elf
.dynobj
= abfd
;
1522 if (!_bfd_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1527 /* It is referenced by a non-shared object. */
1531 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1532 symtab_hdr
, sym_hashes
,
1533 &r_type
, GOT_UNKNOWN
,
1534 rel
, rel_end
, h
, r_symndx
))
1540 htab
->tls_ldm_got
.refcount
+= 1;
1544 /* This symbol requires a procedure linkage table entry. We
1545 actually build the entry in adjust_dynamic_symbol,
1546 because this might be a case of linking PIC code which is
1547 never referenced by a dynamic object, in which case we
1548 don't need to generate a procedure linkage table entry
1551 /* If this is a local symbol, we resolve it directly without
1552 creating a procedure linkage table entry. */
1557 h
->plt
.refcount
+= 1;
1564 case R_386_TLS_IE_32
:
1566 case R_386_TLS_GOTIE
:
1567 if (!info
->executable
)
1568 info
->flags
|= DF_STATIC_TLS
;
1573 case R_386_TLS_GOTDESC
:
1574 case R_386_TLS_DESC_CALL
:
1575 /* This symbol requires a global offset table entry. */
1577 int tls_type
, old_tls_type
;
1582 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1583 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1584 case R_386_TLS_GOTDESC
:
1585 case R_386_TLS_DESC_CALL
:
1586 tls_type
= GOT_TLS_GDESC
; break;
1587 case R_386_TLS_IE_32
:
1588 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1589 tls_type
= GOT_TLS_IE_NEG
;
1591 /* If this is a GD->IE transition, we may use either of
1592 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1593 tls_type
= GOT_TLS_IE
;
1596 case R_386_TLS_GOTIE
:
1597 tls_type
= GOT_TLS_IE_POS
; break;
1602 h
->got
.refcount
+= 1;
1603 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1607 bfd_signed_vma
*local_got_refcounts
;
1609 /* This is a global offset table entry for a local symbol. */
1610 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1611 if (local_got_refcounts
== NULL
)
1615 size
= symtab_hdr
->sh_info
;
1616 size
*= (sizeof (bfd_signed_vma
)
1617 + sizeof (bfd_vma
) + sizeof(char));
1618 local_got_refcounts
= (bfd_signed_vma
*)
1619 bfd_zalloc (abfd
, size
);
1620 if (local_got_refcounts
== NULL
)
1622 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1623 elf_i386_local_tlsdesc_gotent (abfd
)
1624 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1625 elf_i386_local_got_tls_type (abfd
)
1626 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1628 local_got_refcounts
[r_symndx
] += 1;
1629 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1632 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1633 tls_type
|= old_tls_type
;
1634 /* If a TLS symbol is accessed using IE at least once,
1635 there is no point to use dynamic model for it. */
1636 else if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
1637 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1638 || (tls_type
& GOT_TLS_IE
) == 0))
1640 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1641 tls_type
= old_tls_type
;
1642 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1643 && GOT_TLS_GD_ANY_P (tls_type
))
1644 tls_type
|= old_tls_type
;
1648 name
= h
->root
.root
.string
;
1650 name
= bfd_elf_sym_name (abfd
, symtab_hdr
, isym
,
1652 (*_bfd_error_handler
)
1653 (_("%B: `%s' accessed both as normal and "
1654 "thread local symbol"),
1656 bfd_set_error (bfd_error_bad_value
);
1661 if (old_tls_type
!= tls_type
)
1664 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1666 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1674 if (htab
->elf
.sgot
== NULL
)
1676 if (htab
->elf
.dynobj
== NULL
)
1677 htab
->elf
.dynobj
= abfd
;
1678 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
1681 if (r_type
!= R_386_TLS_IE
)
1685 case R_386_TLS_LE_32
:
1687 if (info
->executable
)
1689 info
->flags
|= DF_STATIC_TLS
;
1694 if (h
!= NULL
&& info
->executable
)
1696 /* If this reloc is in a read-only section, we might
1697 need a copy reloc. We can't check reliably at this
1698 stage whether the section is read-only, as input
1699 sections have not yet been mapped to output sections.
1700 Tentatively set the flag for now, and correct in
1701 adjust_dynamic_symbol. */
1704 /* We may need a .plt entry if the function this reloc
1705 refers to is in a shared lib. */
1706 h
->plt
.refcount
+= 1;
1707 if (r_type
!= R_386_PC32
)
1708 h
->pointer_equality_needed
= 1;
1713 /* If we are creating a shared library, and this is a reloc
1714 against a global symbol, or a non PC relative reloc
1715 against a local symbol, then we need to copy the reloc
1716 into the shared library. However, if we are linking with
1717 -Bsymbolic, we do not need to copy a reloc against a
1718 global symbol which is defined in an object we are
1719 including in the link (i.e., DEF_REGULAR is set). At
1720 this point we have not seen all the input files, so it is
1721 possible that DEF_REGULAR is not set now but will be set
1722 later (it is never cleared). In case of a weak definition,
1723 DEF_REGULAR may be cleared later by a strong definition in
1724 a shared library. We account for that possibility below by
1725 storing information in the relocs_copied field of the hash
1726 table entry. A similar situation occurs when creating
1727 shared libraries and symbol visibility changes render the
1730 If on the other hand, we are creating an executable, we
1731 may need to keep relocations for symbols satisfied by a
1732 dynamic library if we manage to avoid copy relocs for the
1735 && (sec
->flags
& SEC_ALLOC
) != 0
1736 && (r_type
!= R_386_PC32
1738 && (! SYMBOLIC_BIND (info
, h
)
1739 || h
->root
.type
== bfd_link_hash_defweak
1740 || !h
->def_regular
))))
1741 || (ELIMINATE_COPY_RELOCS
1743 && (sec
->flags
& SEC_ALLOC
) != 0
1745 && (h
->root
.type
== bfd_link_hash_defweak
1746 || !h
->def_regular
)))
1748 struct elf_dyn_relocs
*p
;
1749 struct elf_dyn_relocs
**head
;
1751 /* We must copy these reloc types into the output file.
1752 Create a reloc section in dynobj and make room for
1756 if (htab
->elf
.dynobj
== NULL
)
1757 htab
->elf
.dynobj
= abfd
;
1759 sreloc
= _bfd_elf_make_dynamic_reloc_section
1760 (sec
, htab
->elf
.dynobj
, 2, abfd
, /*rela?*/ FALSE
);
1766 /* If this is a global symbol, we count the number of
1767 relocations we need for this symbol. */
1770 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1774 /* Track dynamic relocs needed for local syms too.
1775 We really need local syms available to do this
1780 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1785 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1789 vpp
= &elf_section_data (s
)->local_dynrel
;
1790 head
= (struct elf_dyn_relocs
**)vpp
;
1794 if (p
== NULL
|| p
->sec
!= sec
)
1796 bfd_size_type amt
= sizeof *p
;
1797 p
= (struct elf_dyn_relocs
*) bfd_alloc (htab
->elf
.dynobj
,
1809 /* Count size relocation as PC-relative relocation. */
1810 if (r_type
== R_386_PC32
|| size_reloc
)
1815 /* This relocation describes the C++ object vtable hierarchy.
1816 Reconstruct it for later use during GC. */
1817 case R_386_GNU_VTINHERIT
:
1818 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1822 /* This relocation describes which C++ vtable entries are actually
1823 used. Record for later use during GC. */
1824 case R_386_GNU_VTENTRY
:
1825 BFD_ASSERT (h
!= NULL
);
1827 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1839 /* Return the section that should be marked against GC for a given
1843 elf_i386_gc_mark_hook (asection
*sec
,
1844 struct bfd_link_info
*info
,
1845 Elf_Internal_Rela
*rel
,
1846 struct elf_link_hash_entry
*h
,
1847 Elf_Internal_Sym
*sym
)
1850 switch (ELF32_R_TYPE (rel
->r_info
))
1852 case R_386_GNU_VTINHERIT
:
1853 case R_386_GNU_VTENTRY
:
1857 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1860 /* Update the got entry reference counts for the section being removed. */
1863 elf_i386_gc_sweep_hook (bfd
*abfd
,
1864 struct bfd_link_info
*info
,
1866 const Elf_Internal_Rela
*relocs
)
1868 struct elf_i386_link_hash_table
*htab
;
1869 Elf_Internal_Shdr
*symtab_hdr
;
1870 struct elf_link_hash_entry
**sym_hashes
;
1871 bfd_signed_vma
*local_got_refcounts
;
1872 const Elf_Internal_Rela
*rel
, *relend
;
1874 if (info
->relocatable
)
1877 htab
= elf_i386_hash_table (info
);
1881 elf_section_data (sec
)->local_dynrel
= NULL
;
1883 symtab_hdr
= &elf_symtab_hdr (abfd
);
1884 sym_hashes
= elf_sym_hashes (abfd
);
1885 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1887 relend
= relocs
+ sec
->reloc_count
;
1888 for (rel
= relocs
; rel
< relend
; rel
++)
1890 unsigned long r_symndx
;
1891 unsigned int r_type
;
1892 struct elf_link_hash_entry
*h
= NULL
;
1894 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1895 if (r_symndx
>= symtab_hdr
->sh_info
)
1897 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1898 while (h
->root
.type
== bfd_link_hash_indirect
1899 || h
->root
.type
== bfd_link_hash_warning
)
1900 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1904 /* A local symbol. */
1905 Elf_Internal_Sym
*isym
;
1907 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1910 /* Check relocation against local STT_GNU_IFUNC symbol. */
1912 && ELF32_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1914 h
= elf_i386_get_local_sym_hash (htab
, abfd
, rel
, FALSE
);
1922 struct elf_i386_link_hash_entry
*eh
;
1923 struct elf_dyn_relocs
**pp
;
1924 struct elf_dyn_relocs
*p
;
1926 eh
= (struct elf_i386_link_hash_entry
*) h
;
1927 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1930 /* Everything must go for SEC. */
1936 r_type
= ELF32_R_TYPE (rel
->r_info
);
1937 if (! elf_i386_tls_transition (info
, abfd
, sec
, NULL
,
1938 symtab_hdr
, sym_hashes
,
1939 &r_type
, GOT_UNKNOWN
,
1940 rel
, relend
, h
, r_symndx
))
1946 if (htab
->tls_ldm_got
.refcount
> 0)
1947 htab
->tls_ldm_got
.refcount
-= 1;
1951 case R_386_TLS_GOTDESC
:
1952 case R_386_TLS_DESC_CALL
:
1953 case R_386_TLS_IE_32
:
1955 case R_386_TLS_GOTIE
:
1959 if (h
->got
.refcount
> 0)
1960 h
->got
.refcount
-= 1;
1961 if (h
->type
== STT_GNU_IFUNC
)
1963 if (h
->plt
.refcount
> 0)
1964 h
->plt
.refcount
-= 1;
1967 else if (local_got_refcounts
!= NULL
)
1969 if (local_got_refcounts
[r_symndx
] > 0)
1970 local_got_refcounts
[r_symndx
] -= 1;
1978 && (h
== NULL
|| h
->type
!= STT_GNU_IFUNC
))
1985 if (h
->plt
.refcount
> 0)
1986 h
->plt
.refcount
-= 1;
1991 if (h
!= NULL
&& h
->type
== STT_GNU_IFUNC
)
1993 if (h
->got
.refcount
> 0)
1994 h
->got
.refcount
-= 1;
1995 if (h
->plt
.refcount
> 0)
1996 h
->plt
.refcount
-= 1;
2008 /* Adjust a symbol defined by a dynamic object and referenced by a
2009 regular object. The current definition is in some section of the
2010 dynamic object, but we're not including those sections. We have to
2011 change the definition to something the rest of the link can
2015 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
2016 struct elf_link_hash_entry
*h
)
2018 struct elf_i386_link_hash_table
*htab
;
2020 struct elf_i386_link_hash_entry
*eh
;
2021 struct elf_dyn_relocs
*p
;
2023 /* STT_GNU_IFUNC symbol must go through PLT. */
2024 if (h
->type
== STT_GNU_IFUNC
)
2026 /* All local STT_GNU_IFUNC references must be treate as local
2027 calls via local PLT. */
2029 && SYMBOL_CALLS_LOCAL (info
, h
))
2031 bfd_size_type pc_count
= 0, count
= 0;
2032 struct elf_dyn_relocs
**pp
;
2034 eh
= (struct elf_i386_link_hash_entry
*) h
;
2035 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2037 pc_count
+= p
->pc_count
;
2038 p
->count
-= p
->pc_count
;
2047 if (pc_count
|| count
)
2051 if (h
->plt
.refcount
<= 0)
2052 h
->plt
.refcount
= 1;
2054 h
->plt
.refcount
+= 1;
2058 if (h
->plt
.refcount
<= 0)
2060 h
->plt
.offset
= (bfd_vma
) -1;
2066 /* If this is a function, put it in the procedure linkage table. We
2067 will fill in the contents of the procedure linkage table later,
2068 when we know the address of the .got section. */
2069 if (h
->type
== STT_FUNC
2072 if (h
->plt
.refcount
<= 0
2073 || SYMBOL_CALLS_LOCAL (info
, h
)
2074 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
2075 && h
->root
.type
== bfd_link_hash_undefweak
))
2077 /* This case can occur if we saw a PLT32 reloc in an input
2078 file, but the symbol was never referred to by a dynamic
2079 object, or if all references were garbage collected. In
2080 such a case, we don't actually need to build a procedure
2081 linkage table, and we can just do a PC32 reloc instead. */
2082 h
->plt
.offset
= (bfd_vma
) -1;
2089 /* It's possible that we incorrectly decided a .plt reloc was
2090 needed for an R_386_PC32 reloc to a non-function sym in
2091 check_relocs. We can't decide accurately between function and
2092 non-function syms in check-relocs; Objects loaded later in
2093 the link may change h->type. So fix it now. */
2094 h
->plt
.offset
= (bfd_vma
) -1;
2096 /* If this is a weak symbol, and there is a real definition, the
2097 processor independent code will have arranged for us to see the
2098 real definition first, and we can just use the same value. */
2099 if (h
->u
.weakdef
!= NULL
)
2101 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
2102 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
2103 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
2104 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
2105 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
2106 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
2110 /* This is a reference to a symbol defined by a dynamic object which
2111 is not a function. */
2113 /* If we are creating a shared library, we must presume that the
2114 only references to the symbol are via the global offset table.
2115 For such cases we need not do anything here; the relocations will
2116 be handled correctly by relocate_section. */
2120 /* If there are no references to this symbol that do not use the
2121 GOT, we don't need to generate a copy reloc. */
2122 if (!h
->non_got_ref
)
2125 /* If -z nocopyreloc was given, we won't generate them either. */
2126 if (info
->nocopyreloc
)
2132 htab
= elf_i386_hash_table (info
);
2136 /* If there aren't any dynamic relocs in read-only sections, then
2137 we can keep the dynamic relocs and avoid the copy reloc. This
2138 doesn't work on VxWorks, where we can not have dynamic relocations
2139 (other than copy and jump slot relocations) in an executable. */
2140 if (ELIMINATE_COPY_RELOCS
2141 && !get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2143 eh
= (struct elf_i386_link_hash_entry
*) h
;
2144 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2146 s
= p
->sec
->output_section
;
2147 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2158 /* We must allocate the symbol in our .dynbss section, which will
2159 become part of the .bss section of the executable. There will be
2160 an entry for this symbol in the .dynsym section. The dynamic
2161 object will contain position independent code, so all references
2162 from the dynamic object to this symbol will go through the global
2163 offset table. The dynamic linker will use the .dynsym entry to
2164 determine the address it must put in the global offset table, so
2165 both the dynamic object and the regular object will refer to the
2166 same memory location for the variable. */
2168 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2169 copy the initial value out of the dynamic object and into the
2170 runtime process image. */
2171 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
2173 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
2179 return _bfd_elf_adjust_dynamic_copy (h
, s
);
2182 /* Allocate space in .plt, .got and associated reloc sections for
2186 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2188 struct bfd_link_info
*info
;
2189 struct elf_i386_link_hash_table
*htab
;
2190 struct elf_i386_link_hash_entry
*eh
;
2191 struct elf_dyn_relocs
*p
;
2192 unsigned plt_entry_size
;
2194 if (h
->root
.type
== bfd_link_hash_indirect
)
2197 eh
= (struct elf_i386_link_hash_entry
*) h
;
2199 info
= (struct bfd_link_info
*) inf
;
2200 htab
= elf_i386_hash_table (info
);
2204 plt_entry_size
= GET_PLT_ENTRY_SIZE (info
->output_bfd
);
2206 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2207 here if it is defined and referenced in a non-shared object. */
2208 if (h
->type
== STT_GNU_IFUNC
2210 return _bfd_elf_allocate_ifunc_dyn_relocs (info
, h
, &eh
->dyn_relocs
,
2212 else if (htab
->elf
.dynamic_sections_created
2213 && h
->plt
.refcount
> 0)
2215 /* Make sure this symbol is output as a dynamic symbol.
2216 Undefined weak syms won't yet be marked as dynamic. */
2217 if (h
->dynindx
== -1
2218 && !h
->forced_local
)
2220 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2225 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
2227 asection
*s
= htab
->elf
.splt
;
2229 /* If this is the first .plt entry, make room for the special
2232 s
->size
+= plt_entry_size
;
2234 h
->plt
.offset
= s
->size
;
2236 /* If this symbol is not defined in a regular file, and we are
2237 not generating a shared library, then set the symbol to this
2238 location in the .plt. This is required to make function
2239 pointers compare as equal between the normal executable and
2240 the shared library. */
2244 h
->root
.u
.def
.section
= s
;
2245 h
->root
.u
.def
.value
= h
->plt
.offset
;
2248 /* Make room for this entry. */
2249 s
->size
+= plt_entry_size
;
2251 /* We also need to make an entry in the .got.plt section, which
2252 will be placed in the .got section by the linker script. */
2253 htab
->elf
.sgotplt
->size
+= 4;
2255 /* We also need to make an entry in the .rel.plt section. */
2256 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2257 htab
->elf
.srelplt
->reloc_count
++;
2259 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
2262 /* VxWorks has a second set of relocations for each PLT entry
2263 in executables. They go in a separate relocation section,
2264 which is processed by the kernel loader. */
2266 /* There are two relocations for the initial PLT entry: an
2267 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2268 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2270 if (h
->plt
.offset
== plt_entry_size
)
2271 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2273 /* There are two extra relocations for each subsequent PLT entry:
2274 an R_386_32 relocation for the GOT entry, and an R_386_32
2275 relocation for the PLT entry. */
2277 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
2282 h
->plt
.offset
= (bfd_vma
) -1;
2288 h
->plt
.offset
= (bfd_vma
) -1;
2292 eh
->tlsdesc_got
= (bfd_vma
) -1;
2294 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2295 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2296 if (h
->got
.refcount
> 0
2299 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
2300 h
->got
.offset
= (bfd_vma
) -1;
2301 else if (h
->got
.refcount
> 0)
2305 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2307 /* Make sure this symbol is output as a dynamic symbol.
2308 Undefined weak syms won't yet be marked as dynamic. */
2309 if (h
->dynindx
== -1
2310 && !h
->forced_local
)
2312 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2317 if (GOT_TLS_GDESC_P (tls_type
))
2319 eh
->tlsdesc_got
= htab
->elf
.sgotplt
->size
2320 - elf_i386_compute_jump_table_size (htab
);
2321 htab
->elf
.sgotplt
->size
+= 8;
2322 h
->got
.offset
= (bfd_vma
) -2;
2324 if (! GOT_TLS_GDESC_P (tls_type
)
2325 || GOT_TLS_GD_P (tls_type
))
2327 h
->got
.offset
= s
->size
;
2329 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2330 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
2333 dyn
= htab
->elf
.dynamic_sections_created
;
2334 /* R_386_TLS_IE_32 needs one dynamic relocation,
2335 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2336 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2337 need two), R_386_TLS_GD needs one if local symbol and two if
2339 if (tls_type
== GOT_TLS_IE_BOTH
)
2340 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2341 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
2342 || (tls_type
& GOT_TLS_IE
))
2343 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2344 else if (GOT_TLS_GD_P (tls_type
))
2345 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
2346 else if (! GOT_TLS_GDESC_P (tls_type
)
2347 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2348 || h
->root
.type
!= bfd_link_hash_undefweak
)
2350 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
2351 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2352 if (GOT_TLS_GDESC_P (tls_type
))
2353 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2356 h
->got
.offset
= (bfd_vma
) -1;
2358 if (eh
->dyn_relocs
== NULL
)
2361 /* In the shared -Bsymbolic case, discard space allocated for
2362 dynamic pc-relative relocs against symbols which turn out to be
2363 defined in regular objects. For the normal shared case, discard
2364 space for pc-relative relocs that have become local due to symbol
2365 visibility changes. */
2369 /* The only reloc that uses pc_count is R_386_PC32, which will
2370 appear on a call or on something like ".long foo - .". We
2371 want calls to protected symbols to resolve directly to the
2372 function rather than going via the plt. If people want
2373 function pointer comparisons to work as expected then they
2374 should avoid writing assembly like ".long foo - .". */
2375 if (SYMBOL_CALLS_LOCAL (info
, h
))
2377 struct elf_dyn_relocs
**pp
;
2379 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2381 p
->count
-= p
->pc_count
;
2390 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2392 struct elf_dyn_relocs
**pp
;
2393 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2395 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2402 /* Also discard relocs on undefined weak syms with non-default
2404 if (eh
->dyn_relocs
!= NULL
2405 && h
->root
.type
== bfd_link_hash_undefweak
)
2407 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2408 eh
->dyn_relocs
= NULL
;
2410 /* Make sure undefined weak symbols are output as a dynamic
2412 else if (h
->dynindx
== -1
2413 && !h
->forced_local
)
2415 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2420 else if (ELIMINATE_COPY_RELOCS
)
2422 /* For the non-shared case, discard space for relocs against
2423 symbols which turn out to need copy relocs or are not
2429 || (htab
->elf
.dynamic_sections_created
2430 && (h
->root
.type
== bfd_link_hash_undefweak
2431 || h
->root
.type
== bfd_link_hash_undefined
))))
2433 /* Make sure this symbol is output as a dynamic symbol.
2434 Undefined weak syms won't yet be marked as dynamic. */
2435 if (h
->dynindx
== -1
2436 && !h
->forced_local
)
2438 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2442 /* If that succeeded, we know we'll be keeping all the
2444 if (h
->dynindx
!= -1)
2448 eh
->dyn_relocs
= NULL
;
2453 /* Finally, allocate space. */
2454 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2458 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2460 BFD_ASSERT (sreloc
!= NULL
);
2461 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2467 /* Allocate space in .plt, .got and associated reloc sections for
2468 local dynamic relocs. */
2471 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2473 struct elf_link_hash_entry
*h
2474 = (struct elf_link_hash_entry
*) *slot
;
2476 if (h
->type
!= STT_GNU_IFUNC
2480 || h
->root
.type
!= bfd_link_hash_defined
)
2483 return elf_i386_allocate_dynrelocs (h
, inf
);
2486 /* Find any dynamic relocs that apply to read-only sections. */
2489 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2491 struct elf_i386_link_hash_entry
*eh
;
2492 struct elf_dyn_relocs
*p
;
2494 /* Skip local IFUNC symbols. */
2495 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2498 eh
= (struct elf_i386_link_hash_entry
*) h
;
2499 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2501 asection
*s
= p
->sec
->output_section
;
2503 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2505 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2507 info
->flags
|= DF_TEXTREL
;
2509 if (info
->warn_shared_textrel
&& info
->shared
)
2510 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2511 p
->sec
->owner
, h
->root
.root
.string
,
2514 /* Not an error, just cut short the traversal. */
2522 mov foo@GOT(%reg), %reg
2524 lea foo@GOTOFF(%reg), %reg
2525 with the local symbol, foo. */
2528 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2529 struct bfd_link_info
*link_info
)
2531 Elf_Internal_Shdr
*symtab_hdr
;
2532 Elf_Internal_Rela
*internal_relocs
;
2533 Elf_Internal_Rela
*irel
, *irelend
;
2535 struct elf_i386_link_hash_table
*htab
;
2536 bfd_boolean changed_contents
;
2537 bfd_boolean changed_relocs
;
2538 bfd_signed_vma
*local_got_refcounts
;
2540 /* Don't even try to convert non-ELF outputs. */
2541 if (!is_elf_hash_table (link_info
->hash
))
2544 /* Nothing to do if there are no codes, no relocations or no output. */
2545 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2546 || sec
->reloc_count
== 0
2547 || discarded_section (sec
))
2550 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2552 /* Load the relocations for this section. */
2553 internal_relocs
= (_bfd_elf_link_read_relocs
2554 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2555 link_info
->keep_memory
));
2556 if (internal_relocs
== NULL
)
2559 htab
= elf_i386_hash_table (link_info
);
2560 changed_contents
= FALSE
;
2561 changed_relocs
= FALSE
;
2562 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2564 /* Get the section contents. */
2565 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2566 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2569 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2573 irelend
= internal_relocs
+ sec
->reloc_count
;
2574 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2576 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2577 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2579 struct elf_link_hash_entry
*h
;
2581 if (r_type
!= R_386_GOT32
)
2584 /* Get the symbol referred to by the reloc. */
2585 if (r_symndx
< symtab_hdr
->sh_info
)
2587 Elf_Internal_Sym
*isym
;
2589 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2592 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2593 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2594 && bfd_get_8 (input_bfd
,
2595 contents
+ irel
->r_offset
- 2) == 0x8b)
2597 bfd_put_8 (output_bfd
, 0x8d,
2598 contents
+ irel
->r_offset
- 2);
2599 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2600 if (local_got_refcounts
!= NULL
2601 && local_got_refcounts
[r_symndx
] > 0)
2602 local_got_refcounts
[r_symndx
] -= 1;
2603 changed_contents
= TRUE
;
2604 changed_relocs
= TRUE
;
2609 indx
= r_symndx
- symtab_hdr
->sh_info
;
2610 h
= elf_sym_hashes (abfd
)[indx
];
2611 BFD_ASSERT (h
!= NULL
);
2613 while (h
->root
.type
== bfd_link_hash_indirect
2614 || h
->root
.type
== bfd_link_hash_warning
)
2615 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2617 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2618 optimizing _DYNAMIC since ld.so may use its link-time address. */
2620 && h
->type
!= STT_GNU_IFUNC
2621 && h
!= htab
->elf
.hdynamic
2622 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2623 && bfd_get_8 (input_bfd
,
2624 contents
+ irel
->r_offset
- 2) == 0x8b)
2626 bfd_put_8 (output_bfd
, 0x8d,
2627 contents
+ irel
->r_offset
- 2);
2628 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2629 if (h
->got
.refcount
> 0)
2630 h
->got
.refcount
-= 1;
2631 changed_contents
= TRUE
;
2632 changed_relocs
= TRUE
;
2636 if (contents
!= NULL
2637 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2639 if (!changed_contents
&& !link_info
->keep_memory
)
2643 /* Cache the section contents for elf_link_input_bfd. */
2644 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2648 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2650 if (!changed_relocs
)
2651 free (internal_relocs
);
2653 elf_section_data (sec
)->relocs
= internal_relocs
;
2659 if (contents
!= NULL
2660 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2662 if (internal_relocs
!= NULL
2663 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2664 free (internal_relocs
);
2668 /* Set the sizes of the dynamic sections. */
2671 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2673 struct elf_i386_link_hash_table
*htab
;
2679 htab
= elf_i386_hash_table (info
);
2682 dynobj
= htab
->elf
.dynobj
;
2686 if (htab
->elf
.dynamic_sections_created
)
2688 /* Set the contents of the .interp section to the interpreter. */
2689 if (info
->executable
)
2691 s
= bfd_get_linker_section (dynobj
, ".interp");
2694 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2695 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2699 /* Set up .got offsets for local syms, and space for local dynamic
2701 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2703 bfd_signed_vma
*local_got
;
2704 bfd_signed_vma
*end_local_got
;
2705 char *local_tls_type
;
2706 bfd_vma
*local_tlsdesc_gotent
;
2707 bfd_size_type locsymcount
;
2708 Elf_Internal_Shdr
*symtab_hdr
;
2711 if (! is_i386_elf (ibfd
))
2714 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2716 struct elf_dyn_relocs
*p
;
2718 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2721 for (p
= ((struct elf_dyn_relocs
*)
2722 elf_section_data (s
)->local_dynrel
);
2726 if (!bfd_is_abs_section (p
->sec
)
2727 && bfd_is_abs_section (p
->sec
->output_section
))
2729 /* Input section has been discarded, either because
2730 it is a copy of a linkonce section or due to
2731 linker script /DISCARD/, so we'll be discarding
2734 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2735 && strcmp (p
->sec
->output_section
->name
,
2738 /* Relocations in vxworks .tls_vars sections are
2739 handled specially by the loader. */
2741 else if (p
->count
!= 0)
2743 srel
= elf_section_data (p
->sec
)->sreloc
;
2744 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2745 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2746 && (info
->flags
& DF_TEXTREL
) == 0)
2748 info
->flags
|= DF_TEXTREL
;
2749 if (info
->warn_shared_textrel
&& info
->shared
)
2750 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2751 p
->sec
->owner
, p
->sec
);
2757 local_got
= elf_local_got_refcounts (ibfd
);
2761 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2762 locsymcount
= symtab_hdr
->sh_info
;
2763 end_local_got
= local_got
+ locsymcount
;
2764 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2765 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2767 srel
= htab
->elf
.srelgot
;
2768 for (; local_got
< end_local_got
;
2769 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2771 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2774 if (GOT_TLS_GDESC_P (*local_tls_type
))
2776 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2777 - elf_i386_compute_jump_table_size (htab
);
2778 htab
->elf
.sgotplt
->size
+= 8;
2779 *local_got
= (bfd_vma
) -2;
2781 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2782 || GOT_TLS_GD_P (*local_tls_type
))
2784 *local_got
= s
->size
;
2786 if (GOT_TLS_GD_P (*local_tls_type
)
2787 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2791 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2792 || (*local_tls_type
& GOT_TLS_IE
))
2794 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2795 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2796 else if (GOT_TLS_GD_P (*local_tls_type
)
2797 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2798 srel
->size
+= sizeof (Elf32_External_Rel
);
2799 if (GOT_TLS_GDESC_P (*local_tls_type
))
2800 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2804 *local_got
= (bfd_vma
) -1;
2808 if (htab
->tls_ldm_got
.refcount
> 0)
2810 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2812 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2813 htab
->elf
.sgot
->size
+= 8;
2814 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2817 htab
->tls_ldm_got
.offset
= -1;
2819 /* Allocate global sym .plt and .got entries, and space for global
2820 sym dynamic relocs. */
2821 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2823 /* Allocate .plt and .got entries, and space for local symbols. */
2824 htab_traverse (htab
->loc_hash_table
,
2825 elf_i386_allocate_local_dynrelocs
,
2828 /* For every jump slot reserved in the sgotplt, reloc_count is
2829 incremented. However, when we reserve space for TLS descriptors,
2830 it's not incremented, so in order to compute the space reserved
2831 for them, it suffices to multiply the reloc count by the jump
2834 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2835 so that R_386_IRELATIVE entries come last. */
2836 if (htab
->elf
.srelplt
)
2838 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2839 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2840 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2842 else if (htab
->elf
.irelplt
)
2843 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2846 if (htab
->elf
.sgotplt
)
2848 /* Don't allocate .got.plt section if there are no GOT nor PLT
2849 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2850 if ((htab
->elf
.hgot
== NULL
2851 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2852 && (htab
->elf
.sgotplt
->size
2853 == get_elf_backend_data (output_bfd
)->got_header_size
)
2854 && (htab
->elf
.splt
== NULL
2855 || htab
->elf
.splt
->size
== 0)
2856 && (htab
->elf
.sgot
== NULL
2857 || htab
->elf
.sgot
->size
== 0)
2858 && (htab
->elf
.iplt
== NULL
2859 || htab
->elf
.iplt
->size
== 0)
2860 && (htab
->elf
.igotplt
== NULL
2861 || htab
->elf
.igotplt
->size
== 0))
2862 htab
->elf
.sgotplt
->size
= 0;
2866 if (htab
->plt_eh_frame
!= NULL
2867 && htab
->elf
.splt
!= NULL
2868 && htab
->elf
.splt
->size
!= 0
2869 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2870 && _bfd_elf_eh_frame_present (info
))
2871 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2873 /* We now have determined the sizes of the various dynamic sections.
2874 Allocate memory for them. */
2876 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2878 bfd_boolean strip_section
= TRUE
;
2880 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2883 if (s
== htab
->elf
.splt
2884 || s
== htab
->elf
.sgot
)
2886 /* Strip this section if we don't need it; see the
2888 /* We'd like to strip these sections if they aren't needed, but if
2889 we've exported dynamic symbols from them we must leave them.
2890 It's too late to tell BFD to get rid of the symbols. */
2892 if (htab
->elf
.hplt
!= NULL
)
2893 strip_section
= FALSE
;
2895 else if (s
== htab
->elf
.sgotplt
2896 || s
== htab
->elf
.iplt
2897 || s
== htab
->elf
.igotplt
2898 || s
== htab
->plt_eh_frame
2899 || s
== htab
->sdynbss
)
2901 /* Strip these too. */
2903 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2906 && s
!= htab
->elf
.srelplt
2907 && s
!= htab
->srelplt2
)
2910 /* We use the reloc_count field as a counter if we need
2911 to copy relocs into the output file. */
2916 /* It's not one of our sections, so don't allocate space. */
2922 /* If we don't need this section, strip it from the
2923 output file. This is mostly to handle .rel.bss and
2924 .rel.plt. We must create both sections in
2925 create_dynamic_sections, because they must be created
2926 before the linker maps input sections to output
2927 sections. The linker does that before
2928 adjust_dynamic_symbol is called, and it is that
2929 function which decides whether anything needs to go
2930 into these sections. */
2932 s
->flags
|= SEC_EXCLUDE
;
2936 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2939 /* Allocate memory for the section contents. We use bfd_zalloc
2940 here in case unused entries are not reclaimed before the
2941 section's contents are written out. This should not happen,
2942 but this way if it does, we get a R_386_NONE reloc instead
2944 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2945 if (s
->contents
== NULL
)
2949 if (htab
->plt_eh_frame
!= NULL
2950 && htab
->plt_eh_frame
->contents
!= NULL
)
2952 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2953 sizeof (elf_i386_eh_frame_plt
));
2954 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2955 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2958 if (htab
->elf
.dynamic_sections_created
)
2960 /* Add some entries to the .dynamic section. We fill in the
2961 values later, in elf_i386_finish_dynamic_sections, but we
2962 must add the entries now so that we get the correct size for
2963 the .dynamic section. The DT_DEBUG entry is filled in by the
2964 dynamic linker and used by the debugger. */
2965 #define add_dynamic_entry(TAG, VAL) \
2966 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2968 if (info
->executable
)
2970 if (!add_dynamic_entry (DT_DEBUG
, 0))
2974 if (htab
->elf
.splt
->size
!= 0)
2976 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2977 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2978 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2979 || !add_dynamic_entry (DT_JMPREL
, 0))
2985 if (!add_dynamic_entry (DT_REL
, 0)
2986 || !add_dynamic_entry (DT_RELSZ
, 0)
2987 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2990 /* If any dynamic relocs apply to a read-only section,
2991 then we need a DT_TEXTREL entry. */
2992 if ((info
->flags
& DF_TEXTREL
) == 0)
2993 elf_link_hash_traverse (&htab
->elf
,
2994 elf_i386_readonly_dynrelocs
, info
);
2996 if ((info
->flags
& DF_TEXTREL
) != 0)
2998 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3002 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3003 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3006 #undef add_dynamic_entry
3012 elf_i386_always_size_sections (bfd
*output_bfd
,
3013 struct bfd_link_info
*info
)
3015 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3019 struct elf_link_hash_entry
*tlsbase
;
3021 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3022 "_TLS_MODULE_BASE_",
3023 FALSE
, FALSE
, FALSE
);
3025 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3027 struct elf_i386_link_hash_table
*htab
;
3028 struct bfd_link_hash_entry
*bh
= NULL
;
3029 const struct elf_backend_data
*bed
3030 = get_elf_backend_data (output_bfd
);
3032 htab
= elf_i386_hash_table (info
);
3036 if (!(_bfd_generic_link_add_one_symbol
3037 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3038 tls_sec
, 0, NULL
, FALSE
,
3039 bed
->collect
, &bh
)))
3042 htab
->tls_module_base
= bh
;
3044 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3045 tlsbase
->def_regular
= 1;
3046 tlsbase
->other
= STV_HIDDEN
;
3047 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3054 /* Set the correct type for an x86 ELF section. We do this by the
3055 section name, which is a hack, but ought to work. */
3058 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3059 Elf_Internal_Shdr
*hdr
,
3064 name
= bfd_get_section_name (abfd
, sec
);
3066 /* This is an ugly, but unfortunately necessary hack that is
3067 needed when producing EFI binaries on x86. It tells
3068 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3069 containing ELF relocation info. We need this hack in order to
3070 be able to generate ELF binaries that can be translated into
3071 EFI applications (which are essentially COFF objects). Those
3072 files contain a COFF ".reloc" section inside an ELFNN object,
3073 which would normally cause BFD to segfault because it would
3074 attempt to interpret this section as containing relocation
3075 entries for section "oc". With this hack enabled, ".reloc"
3076 will be treated as a normal data section, which will avoid the
3077 segfault. However, you won't be able to create an ELFNN binary
3078 with a section named "oc" that needs relocations, but that's
3079 the kind of ugly side-effects you get when detecting section
3080 types based on their names... In practice, this limitation is
3081 unlikely to bite. */
3082 if (strcmp (name
, ".reloc") == 0)
3083 hdr
->sh_type
= SHT_PROGBITS
;
3088 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3089 executables. Rather than setting it to the beginning of the TLS
3090 section, we have to set it to the end. This function may be called
3091 multiple times, it is idempotent. */
3094 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3096 struct elf_i386_link_hash_table
*htab
;
3097 struct bfd_link_hash_entry
*base
;
3099 if (!info
->executable
)
3102 htab
= elf_i386_hash_table (info
);
3106 base
= htab
->tls_module_base
;
3110 base
->u
.def
.value
= htab
->elf
.tls_size
;
3113 /* Return the base VMA address which should be subtracted from real addresses
3114 when resolving @dtpoff relocation.
3115 This is PT_TLS segment p_vaddr. */
3118 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3120 /* If tls_sec is NULL, we should have signalled an error already. */
3121 if (elf_hash_table (info
)->tls_sec
== NULL
)
3123 return elf_hash_table (info
)->tls_sec
->vma
;
3126 /* Return the relocation value for @tpoff relocation
3127 if STT_TLS virtual address is ADDRESS. */
3130 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3132 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3133 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3134 bfd_vma static_tls_size
;
3136 /* If tls_sec is NULL, we should have signalled an error already. */
3137 if (htab
->tls_sec
== NULL
)
3140 /* Consider special static TLS alignment requirements. */
3141 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3142 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3145 /* Relocate an i386 ELF section. */
3148 elf_i386_relocate_section (bfd
*output_bfd
,
3149 struct bfd_link_info
*info
,
3151 asection
*input_section
,
3153 Elf_Internal_Rela
*relocs
,
3154 Elf_Internal_Sym
*local_syms
,
3155 asection
**local_sections
)
3157 struct elf_i386_link_hash_table
*htab
;
3158 Elf_Internal_Shdr
*symtab_hdr
;
3159 struct elf_link_hash_entry
**sym_hashes
;
3160 bfd_vma
*local_got_offsets
;
3161 bfd_vma
*local_tlsdesc_gotents
;
3162 Elf_Internal_Rela
*rel
;
3163 Elf_Internal_Rela
*relend
;
3164 bfd_boolean is_vxworks_tls
;
3165 unsigned plt_entry_size
;
3167 BFD_ASSERT (is_i386_elf (input_bfd
));
3169 htab
= elf_i386_hash_table (info
);
3172 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3173 sym_hashes
= elf_sym_hashes (input_bfd
);
3174 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3175 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3176 /* We have to handle relocations in vxworks .tls_vars sections
3177 specially, because the dynamic loader is 'weird'. */
3178 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3180 && !strcmp (input_section
->output_section
->name
,
3183 elf_i386_set_tls_module_base (info
);
3185 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3188 relend
= relocs
+ input_section
->reloc_count
;
3189 for (; rel
< relend
; rel
++)
3191 unsigned int r_type
;
3192 reloc_howto_type
*howto
;
3193 unsigned long r_symndx
;
3194 struct elf_link_hash_entry
*h
;
3195 Elf_Internal_Sym
*sym
;
3197 bfd_vma off
, offplt
;
3199 bfd_boolean unresolved_reloc
;
3200 bfd_reloc_status_type r
;
3205 r_type
= ELF32_R_TYPE (rel
->r_info
);
3206 if (r_type
== R_386_GNU_VTINHERIT
3207 || r_type
== R_386_GNU_VTENTRY
)
3210 if ((indx
= r_type
) >= R_386_standard
3211 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3212 >= R_386_ext
- R_386_standard
)
3213 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3214 >= R_386_irelative
- R_386_ext
))
3216 (*_bfd_error_handler
)
3217 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3218 input_bfd
, input_section
, r_type
);
3219 bfd_set_error (bfd_error_bad_value
);
3222 howto
= elf_howto_table
+ indx
;
3224 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3228 unresolved_reloc
= FALSE
;
3229 if (r_symndx
< symtab_hdr
->sh_info
)
3231 sym
= local_syms
+ r_symndx
;
3232 sec
= local_sections
[r_symndx
];
3233 relocation
= (sec
->output_section
->vma
3234 + sec
->output_offset
3236 st_size
= sym
->st_size
;
3238 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3239 && ((sec
->flags
& SEC_MERGE
) != 0
3240 || (info
->relocatable
3241 && sec
->output_offset
!= 0)))
3244 bfd_byte
*where
= contents
+ rel
->r_offset
;
3246 switch (howto
->size
)
3249 addend
= bfd_get_8 (input_bfd
, where
);
3250 if (howto
->pc_relative
)
3252 addend
= (addend
^ 0x80) - 0x80;
3257 addend
= bfd_get_16 (input_bfd
, where
);
3258 if (howto
->pc_relative
)
3260 addend
= (addend
^ 0x8000) - 0x8000;
3265 addend
= bfd_get_32 (input_bfd
, where
);
3266 if (howto
->pc_relative
)
3268 addend
= (addend
^ 0x80000000) - 0x80000000;
3276 if (info
->relocatable
)
3277 addend
+= sec
->output_offset
;
3280 asection
*msec
= sec
;
3281 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3283 addend
-= relocation
;
3284 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3287 switch (howto
->size
)
3290 /* FIXME: overflow checks. */
3291 if (howto
->pc_relative
)
3293 bfd_put_8 (input_bfd
, addend
, where
);
3296 if (howto
->pc_relative
)
3298 bfd_put_16 (input_bfd
, addend
, where
);
3301 if (howto
->pc_relative
)
3303 bfd_put_32 (input_bfd
, addend
, where
);
3307 else if (!info
->relocatable
3308 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3310 /* Relocate against local STT_GNU_IFUNC symbol. */
3311 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3316 /* Set STT_GNU_IFUNC symbol value. */
3317 h
->root
.u
.def
.value
= sym
->st_value
;
3318 h
->root
.u
.def
.section
= sec
;
3323 bfd_boolean warned ATTRIBUTE_UNUSED
;
3325 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3326 r_symndx
, symtab_hdr
, sym_hashes
,
3328 unresolved_reloc
, warned
);
3332 if (sec
!= NULL
&& discarded_section (sec
))
3333 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3334 rel
, 1, relend
, howto
, 0, contents
);
3336 if (info
->relocatable
)
3339 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3340 it here if it is defined in a non-shared object. */
3342 && h
->type
== STT_GNU_IFUNC
3345 asection
*plt
, *gotplt
, *base_got
;
3349 if ((input_section
->flags
& SEC_ALLOC
) == 0
3350 || h
->plt
.offset
== (bfd_vma
) -1)
3353 /* STT_GNU_IFUNC symbol must go through PLT. */
3354 if (htab
->elf
.splt
!= NULL
)
3356 plt
= htab
->elf
.splt
;
3357 gotplt
= htab
->elf
.sgotplt
;
3361 plt
= htab
->elf
.iplt
;
3362 gotplt
= htab
->elf
.igotplt
;
3365 relocation
= (plt
->output_section
->vma
3366 + plt
->output_offset
+ h
->plt
.offset
);
3371 if (h
->root
.root
.string
)
3372 name
= h
->root
.root
.string
;
3374 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3376 (*_bfd_error_handler
)
3377 (_("%B: relocation %s against STT_GNU_IFUNC "
3378 "symbol `%s' isn't handled by %s"), input_bfd
,
3379 elf_howto_table
[r_type
].name
,
3380 name
, __FUNCTION__
);
3381 bfd_set_error (bfd_error_bad_value
);
3385 /* Generate dynamic relcoation only when there is a
3386 non-GOT reference in a shared object. */
3387 if (info
->shared
&& h
->non_got_ref
)
3389 Elf_Internal_Rela outrel
;
3393 /* Need a dynamic relocation to get the real function
3395 offset
= _bfd_elf_section_offset (output_bfd
,
3399 if (offset
== (bfd_vma
) -1
3400 || offset
== (bfd_vma
) -2)
3403 outrel
.r_offset
= (input_section
->output_section
->vma
3404 + input_section
->output_offset
3407 if (h
->dynindx
== -1
3409 || info
->executable
)
3411 /* This symbol is resolved locally. */
3412 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3413 bfd_put_32 (output_bfd
,
3414 (h
->root
.u
.def
.value
3415 + h
->root
.u
.def
.section
->output_section
->vma
3416 + h
->root
.u
.def
.section
->output_offset
),
3420 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3422 sreloc
= htab
->elf
.irelifunc
;
3423 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3425 /* If this reloc is against an external symbol, we
3426 do not want to fiddle with the addend. Otherwise,
3427 we need to include the symbol value so that it
3428 becomes an addend for the dynamic reloc. For an
3429 internal symbol, we have updated addend. */
3438 base_got
= htab
->elf
.sgot
;
3439 off
= h
->got
.offset
;
3441 if (base_got
== NULL
)
3444 if (off
== (bfd_vma
) -1)
3446 /* We can't use h->got.offset here to save state, or
3447 even just remember the offset, as finish_dynamic_symbol
3448 would use that as offset into .got. */
3450 if (htab
->elf
.splt
!= NULL
)
3452 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3453 off
= (plt_index
+ 3) * 4;
3454 base_got
= htab
->elf
.sgotplt
;
3458 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3459 off
= plt_index
* 4;
3460 base_got
= htab
->elf
.igotplt
;
3463 if (h
->dynindx
== -1
3467 /* This references the local defitionion. We must
3468 initialize this entry in the global offset table.
3469 Since the offset must always be a multiple of 8,
3470 we use the least significant bit to record
3471 whether we have initialized it already.
3473 When doing a dynamic link, we create a .rela.got
3474 relocation entry to initialize the value. This
3475 is done in the finish_dynamic_symbol routine. */
3480 bfd_put_32 (output_bfd
, relocation
,
3481 base_got
->contents
+ off
);
3488 /* Adjust for static executables. */
3489 if (htab
->elf
.splt
== NULL
)
3490 relocation
+= gotplt
->output_offset
;
3494 relocation
= (base_got
->output_section
->vma
3495 + base_got
->output_offset
+ off
3496 - gotplt
->output_section
->vma
3497 - gotplt
->output_offset
);
3498 /* Adjust for static executables. */
3499 if (htab
->elf
.splt
== NULL
)
3500 relocation
+= gotplt
->output_offset
;
3506 relocation
-= (gotplt
->output_section
->vma
3507 + gotplt
->output_offset
);
3515 /* Relocation is to the entry for this symbol in the global
3517 if (htab
->elf
.sgot
== NULL
)
3524 off
= h
->got
.offset
;
3525 dyn
= htab
->elf
.dynamic_sections_created
;
3526 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3528 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3529 || (ELF_ST_VISIBILITY (h
->other
)
3530 && h
->root
.type
== bfd_link_hash_undefweak
))
3532 /* This is actually a static link, or it is a
3533 -Bsymbolic link and the symbol is defined
3534 locally, or the symbol was forced to be local
3535 because of a version file. We must initialize
3536 this entry in the global offset table. Since the
3537 offset must always be a multiple of 4, we use the
3538 least significant bit to record whether we have
3539 initialized it already.
3541 When doing a dynamic link, we create a .rel.got
3542 relocation entry to initialize the value. This
3543 is done in the finish_dynamic_symbol routine. */
3548 bfd_put_32 (output_bfd
, relocation
,
3549 htab
->elf
.sgot
->contents
+ off
);
3554 unresolved_reloc
= FALSE
;
3558 if (local_got_offsets
== NULL
)
3561 off
= local_got_offsets
[r_symndx
];
3563 /* The offset must always be a multiple of 4. We use
3564 the least significant bit to record whether we have
3565 already generated the necessary reloc. */
3570 bfd_put_32 (output_bfd
, relocation
,
3571 htab
->elf
.sgot
->contents
+ off
);
3576 Elf_Internal_Rela outrel
;
3578 s
= htab
->elf
.srelgot
;
3582 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3583 + htab
->elf
.sgot
->output_offset
3585 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3586 elf_append_rel (output_bfd
, s
, &outrel
);
3589 local_got_offsets
[r_symndx
] |= 1;
3593 if (off
>= (bfd_vma
) -2)
3596 relocation
= htab
->elf
.sgot
->output_section
->vma
3597 + htab
->elf
.sgot
->output_offset
+ off
3598 - htab
->elf
.sgotplt
->output_section
->vma
3599 - htab
->elf
.sgotplt
->output_offset
;
3603 /* Relocation is relative to the start of the global offset
3606 /* Check to make sure it isn't a protected function symbol
3607 for shared library since it may not be local when used
3608 as function address. We also need to make sure that a
3609 symbol is defined locally. */
3610 if (info
->shared
&& h
)
3612 if (!h
->def_regular
)
3616 switch (ELF_ST_VISIBILITY (h
->other
))
3619 v
= _("hidden symbol");
3622 v
= _("internal symbol");
3625 v
= _("protected symbol");
3632 (*_bfd_error_handler
)
3633 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3634 input_bfd
, v
, h
->root
.root
.string
);
3635 bfd_set_error (bfd_error_bad_value
);
3638 else if (!info
->executable
3639 && !SYMBOLIC_BIND (info
, h
)
3640 && h
->type
== STT_FUNC
3641 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3643 (*_bfd_error_handler
)
3644 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3645 input_bfd
, h
->root
.root
.string
);
3646 bfd_set_error (bfd_error_bad_value
);
3651 /* Note that sgot is not involved in this
3652 calculation. We always want the start of .got.plt. If we
3653 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3654 permitted by the ABI, we might have to change this
3656 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3657 + htab
->elf
.sgotplt
->output_offset
;
3661 /* Use global offset table as symbol value. */
3662 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3663 + htab
->elf
.sgotplt
->output_offset
;
3664 unresolved_reloc
= FALSE
;
3668 /* Relocation is to the entry for this symbol in the
3669 procedure linkage table. */
3671 /* Resolve a PLT32 reloc against a local symbol directly,
3672 without using the procedure linkage table. */
3676 if (h
->plt
.offset
== (bfd_vma
) -1
3677 || htab
->elf
.splt
== NULL
)
3679 /* We didn't make a PLT entry for this symbol. This
3680 happens when statically linking PIC code, or when
3681 using -Bsymbolic. */
3685 relocation
= (htab
->elf
.splt
->output_section
->vma
3686 + htab
->elf
.splt
->output_offset
3688 unresolved_reloc
= FALSE
;
3692 /* Set to symbol size. */
3693 relocation
= st_size
;
3698 if ((input_section
->flags
& SEC_ALLOC
) == 0
3704 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3705 || h
->root
.type
!= bfd_link_hash_undefweak
)
3706 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3707 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3708 || (ELIMINATE_COPY_RELOCS
3715 || h
->root
.type
== bfd_link_hash_undefweak
3716 || h
->root
.type
== bfd_link_hash_undefined
)))
3718 Elf_Internal_Rela outrel
;
3719 bfd_boolean skip
, relocate
;
3722 /* When generating a shared object, these relocations
3723 are copied into the output file to be resolved at run
3730 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3732 if (outrel
.r_offset
== (bfd_vma
) -1)
3734 else if (outrel
.r_offset
== (bfd_vma
) -2)
3735 skip
= TRUE
, relocate
= TRUE
;
3736 outrel
.r_offset
+= (input_section
->output_section
->vma
3737 + input_section
->output_offset
);
3740 memset (&outrel
, 0, sizeof outrel
);
3743 && (r_type
== R_386_PC32
3745 || !SYMBOLIC_BIND (info
, h
)
3746 || !h
->def_regular
))
3747 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3750 /* This symbol is local, or marked to become local. */
3752 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3755 sreloc
= elf_section_data (input_section
)->sreloc
;
3757 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3759 r
= bfd_reloc_notsupported
;
3760 goto check_relocation_error
;
3763 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3765 /* If this reloc is against an external symbol, we do
3766 not want to fiddle with the addend. Otherwise, we
3767 need to include the symbol value so that it becomes
3768 an addend for the dynamic reloc. */
3775 if (!info
->executable
)
3777 Elf_Internal_Rela outrel
;
3780 outrel
.r_offset
= rel
->r_offset
3781 + input_section
->output_section
->vma
3782 + input_section
->output_offset
;
3783 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3784 sreloc
= elf_section_data (input_section
)->sreloc
;
3787 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3792 case R_386_TLS_GOTDESC
:
3793 case R_386_TLS_DESC_CALL
:
3794 case R_386_TLS_IE_32
:
3795 case R_386_TLS_GOTIE
:
3796 tls_type
= GOT_UNKNOWN
;
3797 if (h
== NULL
&& local_got_offsets
)
3798 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3800 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3801 if (tls_type
== GOT_TLS_IE
)
3802 tls_type
= GOT_TLS_IE_NEG
;
3804 if (! elf_i386_tls_transition (info
, input_bfd
,
3805 input_section
, contents
,
3806 symtab_hdr
, sym_hashes
,
3807 &r_type
, tls_type
, rel
,
3808 relend
, h
, r_symndx
))
3811 if (r_type
== R_386_TLS_LE_32
)
3813 BFD_ASSERT (! unresolved_reloc
);
3814 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3819 /* GD->LE transition. */
3820 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3823 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3825 movl %gs:0, %eax; subl $foo@tpoff, %eax
3826 (6 byte form of subl). */
3827 memcpy (contents
+ rel
->r_offset
- 3,
3828 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3829 roff
= rel
->r_offset
+ 5;
3833 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3835 movl %gs:0, %eax; subl $foo@tpoff, %eax
3836 (6 byte form of subl). */
3837 memcpy (contents
+ rel
->r_offset
- 2,
3838 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3839 roff
= rel
->r_offset
+ 6;
3841 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3843 /* Skip R_386_PC32/R_386_PLT32. */
3847 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3849 /* GDesc -> LE transition.
3850 It's originally something like:
3851 leal x@tlsdesc(%ebx), %eax
3855 Registers other than %eax may be set up here. */
3860 roff
= rel
->r_offset
;
3861 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3863 /* Now modify the instruction as appropriate. */
3864 /* aoliva FIXME: remove the above and xor the byte
3866 bfd_put_8 (output_bfd
, val
^ 0x86,
3867 contents
+ roff
- 1);
3868 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3872 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3874 /* GDesc -> LE transition.
3882 roff
= rel
->r_offset
;
3883 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3884 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3887 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3891 /* IE->LE transition:
3892 Originally it can be one of:
3900 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3903 /* movl foo, %eax. */
3904 bfd_put_8 (output_bfd
, 0xb8,
3905 contents
+ rel
->r_offset
- 1);
3911 type
= bfd_get_8 (input_bfd
,
3912 contents
+ rel
->r_offset
- 2);
3917 bfd_put_8 (output_bfd
, 0xc7,
3918 contents
+ rel
->r_offset
- 2);
3919 bfd_put_8 (output_bfd
,
3920 0xc0 | ((val
>> 3) & 7),
3921 contents
+ rel
->r_offset
- 1);
3925 bfd_put_8 (output_bfd
, 0x81,
3926 contents
+ rel
->r_offset
- 2);
3927 bfd_put_8 (output_bfd
,
3928 0xc0 | ((val
>> 3) & 7),
3929 contents
+ rel
->r_offset
- 1);
3936 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3937 contents
+ rel
->r_offset
);
3942 unsigned int val
, type
;
3944 /* {IE_32,GOTIE}->LE transition:
3945 Originally it can be one of:
3946 subl foo(%reg1), %reg2
3947 movl foo(%reg1), %reg2
3948 addl foo(%reg1), %reg2
3951 movl $foo, %reg2 (6 byte form)
3952 addl $foo, %reg2. */
3953 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3954 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3958 bfd_put_8 (output_bfd
, 0xc7,
3959 contents
+ rel
->r_offset
- 2);
3960 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3961 contents
+ rel
->r_offset
- 1);
3963 else if (type
== 0x2b)
3966 bfd_put_8 (output_bfd
, 0x81,
3967 contents
+ rel
->r_offset
- 2);
3968 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3969 contents
+ rel
->r_offset
- 1);
3971 else if (type
== 0x03)
3974 bfd_put_8 (output_bfd
, 0x81,
3975 contents
+ rel
->r_offset
- 2);
3976 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3977 contents
+ rel
->r_offset
- 1);
3981 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
3982 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3983 contents
+ rel
->r_offset
);
3985 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3986 contents
+ rel
->r_offset
);
3991 if (htab
->elf
.sgot
== NULL
)
3996 off
= h
->got
.offset
;
3997 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4001 if (local_got_offsets
== NULL
)
4004 off
= local_got_offsets
[r_symndx
];
4005 offplt
= local_tlsdesc_gotents
[r_symndx
];
4012 Elf_Internal_Rela outrel
;
4016 if (htab
->elf
.srelgot
== NULL
)
4019 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4021 if (GOT_TLS_GDESC_P (tls_type
))
4024 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4025 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4026 <= htab
->elf
.sgotplt
->size
);
4027 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4028 + htab
->elf
.sgotplt
->output_offset
4030 + htab
->sgotplt_jump_table_size
);
4031 sreloc
= htab
->elf
.srelplt
;
4032 loc
= sreloc
->contents
;
4033 loc
+= (htab
->next_tls_desc_index
++
4034 * sizeof (Elf32_External_Rel
));
4035 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4036 <= sreloc
->contents
+ sreloc
->size
);
4037 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4040 BFD_ASSERT (! unresolved_reloc
);
4041 bfd_put_32 (output_bfd
,
4042 relocation
- elf_i386_dtpoff_base (info
),
4043 htab
->elf
.sgotplt
->contents
+ offplt
4044 + htab
->sgotplt_jump_table_size
+ 4);
4048 bfd_put_32 (output_bfd
, 0,
4049 htab
->elf
.sgotplt
->contents
+ offplt
4050 + htab
->sgotplt_jump_table_size
+ 4);
4054 sreloc
= htab
->elf
.srelgot
;
4056 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4057 + htab
->elf
.sgot
->output_offset
+ off
);
4059 if (GOT_TLS_GD_P (tls_type
))
4060 dr_type
= R_386_TLS_DTPMOD32
;
4061 else if (GOT_TLS_GDESC_P (tls_type
))
4063 else if (tls_type
== GOT_TLS_IE_POS
)
4064 dr_type
= R_386_TLS_TPOFF
;
4066 dr_type
= R_386_TLS_TPOFF32
;
4068 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4069 bfd_put_32 (output_bfd
,
4070 relocation
- elf_i386_dtpoff_base (info
),
4071 htab
->elf
.sgot
->contents
+ off
);
4072 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4073 bfd_put_32 (output_bfd
,
4074 elf_i386_dtpoff_base (info
) - relocation
,
4075 htab
->elf
.sgot
->contents
+ off
);
4076 else if (dr_type
!= R_386_TLS_DESC
)
4077 bfd_put_32 (output_bfd
, 0,
4078 htab
->elf
.sgot
->contents
+ off
);
4079 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4081 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4083 if (GOT_TLS_GD_P (tls_type
))
4087 BFD_ASSERT (! unresolved_reloc
);
4088 bfd_put_32 (output_bfd
,
4089 relocation
- elf_i386_dtpoff_base (info
),
4090 htab
->elf
.sgot
->contents
+ off
+ 4);
4094 bfd_put_32 (output_bfd
, 0,
4095 htab
->elf
.sgot
->contents
+ off
+ 4);
4096 outrel
.r_info
= ELF32_R_INFO (indx
,
4097 R_386_TLS_DTPOFF32
);
4098 outrel
.r_offset
+= 4;
4099 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4102 else if (tls_type
== GOT_TLS_IE_BOTH
)
4104 bfd_put_32 (output_bfd
,
4106 ? relocation
- elf_i386_dtpoff_base (info
)
4108 htab
->elf
.sgot
->contents
+ off
+ 4);
4109 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4110 outrel
.r_offset
+= 4;
4111 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4118 local_got_offsets
[r_symndx
] |= 1;
4121 if (off
>= (bfd_vma
) -2
4122 && ! GOT_TLS_GDESC_P (tls_type
))
4124 if (r_type
== R_386_TLS_GOTDESC
4125 || r_type
== R_386_TLS_DESC_CALL
)
4127 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4128 unresolved_reloc
= FALSE
;
4130 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4132 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4133 + htab
->elf
.sgotplt
->output_offset
;
4134 relocation
= htab
->elf
.sgot
->output_section
->vma
4135 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4136 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4137 && tls_type
== GOT_TLS_IE_BOTH
)
4139 if (r_type
== R_386_TLS_IE
)
4140 relocation
+= g_o_t
;
4141 unresolved_reloc
= FALSE
;
4143 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4145 unsigned int val
, type
;
4148 /* GD->IE transition. */
4149 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4150 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4153 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4155 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4157 roff
= rel
->r_offset
- 3;
4161 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4163 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4164 roff
= rel
->r_offset
- 2;
4166 memcpy (contents
+ roff
,
4167 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4168 contents
[roff
+ 7] = 0x80 | (val
& 7);
4169 /* If foo is used only with foo@gotntpoff(%reg) and
4170 foo@indntpoff, but not with foo@gottpoff(%reg), change
4171 subl $foo@gottpoff(%reg), %eax
4173 addl $foo@gotntpoff(%reg), %eax. */
4174 if (tls_type
== GOT_TLS_IE_POS
)
4175 contents
[roff
+ 6] = 0x03;
4176 bfd_put_32 (output_bfd
,
4177 htab
->elf
.sgot
->output_section
->vma
4178 + htab
->elf
.sgot
->output_offset
+ off
4179 - htab
->elf
.sgotplt
->output_section
->vma
4180 - htab
->elf
.sgotplt
->output_offset
,
4181 contents
+ roff
+ 8);
4182 /* Skip R_386_PLT32. */
4186 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4188 /* GDesc -> IE transition.
4189 It's originally something like:
4190 leal x@tlsdesc(%ebx), %eax
4193 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4195 movl x@gottpoff(%ebx), %eax # before negl %eax
4197 Registers other than %eax may be set up here. */
4201 /* First, make sure it's a leal adding ebx to a 32-bit
4202 offset into any register, although it's probably
4203 almost always going to be eax. */
4204 roff
= rel
->r_offset
;
4206 /* Now modify the instruction as appropriate. */
4207 /* To turn a leal into a movl in the form we use it, it
4208 suffices to change the first byte from 0x8d to 0x8b.
4209 aoliva FIXME: should we decide to keep the leal, all
4210 we have to do is remove the statement below, and
4211 adjust the relaxation of R_386_TLS_DESC_CALL. */
4212 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4214 if (tls_type
== GOT_TLS_IE_BOTH
)
4217 bfd_put_32 (output_bfd
,
4218 htab
->elf
.sgot
->output_section
->vma
4219 + htab
->elf
.sgot
->output_offset
+ off
4220 - htab
->elf
.sgotplt
->output_section
->vma
4221 - htab
->elf
.sgotplt
->output_offset
,
4225 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4227 /* GDesc -> IE transition.
4235 depending on how we transformed the TLS_GOTDESC above.
4240 roff
= rel
->r_offset
;
4242 /* Now modify the instruction as appropriate. */
4243 if (tls_type
!= GOT_TLS_IE_NEG
)
4246 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4247 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4252 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4253 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4263 if (! elf_i386_tls_transition (info
, input_bfd
,
4264 input_section
, contents
,
4265 symtab_hdr
, sym_hashes
,
4266 &r_type
, GOT_UNKNOWN
, rel
,
4267 relend
, h
, r_symndx
))
4270 if (r_type
!= R_386_TLS_LDM
)
4272 /* LD->LE transition:
4273 leal foo(%reg), %eax; call ___tls_get_addr.
4275 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4276 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4277 memcpy (contents
+ rel
->r_offset
- 2,
4278 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4279 /* Skip R_386_PC32/R_386_PLT32. */
4284 if (htab
->elf
.sgot
== NULL
)
4287 off
= htab
->tls_ldm_got
.offset
;
4292 Elf_Internal_Rela outrel
;
4294 if (htab
->elf
.srelgot
== NULL
)
4297 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4298 + htab
->elf
.sgot
->output_offset
+ off
);
4300 bfd_put_32 (output_bfd
, 0,
4301 htab
->elf
.sgot
->contents
+ off
);
4302 bfd_put_32 (output_bfd
, 0,
4303 htab
->elf
.sgot
->contents
+ off
+ 4);
4304 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4305 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4306 htab
->tls_ldm_got
.offset
|= 1;
4308 relocation
= htab
->elf
.sgot
->output_section
->vma
4309 + htab
->elf
.sgot
->output_offset
+ off
4310 - htab
->elf
.sgotplt
->output_section
->vma
4311 - htab
->elf
.sgotplt
->output_offset
;
4312 unresolved_reloc
= FALSE
;
4315 case R_386_TLS_LDO_32
:
4316 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4317 relocation
-= elf_i386_dtpoff_base (info
);
4319 /* When converting LDO to LE, we must negate. */
4320 relocation
= -elf_i386_tpoff (info
, relocation
);
4323 case R_386_TLS_LE_32
:
4325 if (!info
->executable
)
4327 Elf_Internal_Rela outrel
;
4330 outrel
.r_offset
= rel
->r_offset
4331 + input_section
->output_section
->vma
4332 + input_section
->output_offset
;
4333 if (h
!= NULL
&& h
->dynindx
!= -1)
4337 if (r_type
== R_386_TLS_LE_32
)
4338 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4340 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4341 sreloc
= elf_section_data (input_section
)->sreloc
;
4344 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4347 else if (r_type
== R_386_TLS_LE_32
)
4348 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4350 relocation
-= elf_i386_dtpoff_base (info
);
4352 else if (r_type
== R_386_TLS_LE_32
)
4353 relocation
= elf_i386_tpoff (info
, relocation
);
4355 relocation
= -elf_i386_tpoff (info
, relocation
);
4362 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4363 because such sections are not SEC_ALLOC and thus ld.so will
4364 not process them. */
4365 if (unresolved_reloc
4366 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4368 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4369 rel
->r_offset
) != (bfd_vma
) -1)
4371 (*_bfd_error_handler
)
4372 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4375 (long) rel
->r_offset
,
4377 h
->root
.root
.string
);
4382 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4383 contents
, rel
->r_offset
,
4386 check_relocation_error
:
4387 if (r
!= bfd_reloc_ok
)
4392 name
= h
->root
.root
.string
;
4395 name
= bfd_elf_string_from_elf_section (input_bfd
,
4396 symtab_hdr
->sh_link
,
4401 name
= bfd_section_name (input_bfd
, sec
);
4404 if (r
== bfd_reloc_overflow
)
4406 if (! ((*info
->callbacks
->reloc_overflow
)
4407 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4408 (bfd_vma
) 0, input_bfd
, input_section
,
4414 (*_bfd_error_handler
)
4415 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4416 input_bfd
, input_section
,
4417 (long) rel
->r_offset
, name
, (int) r
);
4426 /* Finish up dynamic symbol handling. We set the contents of various
4427 dynamic sections here. */
4430 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4431 struct bfd_link_info
*info
,
4432 struct elf_link_hash_entry
*h
,
4433 Elf_Internal_Sym
*sym
)
4435 struct elf_i386_link_hash_table
*htab
;
4436 unsigned plt_entry_size
;
4437 const struct elf_i386_backend_data
*abed
;
4439 htab
= elf_i386_hash_table (info
);
4443 abed
= get_elf_i386_backend_data (output_bfd
);
4444 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4446 if (h
->plt
.offset
!= (bfd_vma
) -1)
4450 Elf_Internal_Rela rel
;
4452 asection
*plt
, *gotplt
, *relplt
;
4454 /* When building a static executable, use .iplt, .igot.plt and
4455 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4456 if (htab
->elf
.splt
!= NULL
)
4458 plt
= htab
->elf
.splt
;
4459 gotplt
= htab
->elf
.sgotplt
;
4460 relplt
= htab
->elf
.srelplt
;
4464 plt
= htab
->elf
.iplt
;
4465 gotplt
= htab
->elf
.igotplt
;
4466 relplt
= htab
->elf
.irelplt
;
4469 /* This symbol has an entry in the procedure linkage table. Set
4472 if ((h
->dynindx
== -1
4473 && !((h
->forced_local
|| info
->executable
)
4475 && h
->type
== STT_GNU_IFUNC
))
4481 /* Get the index in the procedure linkage table which
4482 corresponds to this symbol. This is the index of this symbol
4483 in all the symbols for which we are making plt entries. The
4484 first entry in the procedure linkage table is reserved.
4486 Get the offset into the .got table of the entry that
4487 corresponds to this function. Each .got entry is 4 bytes.
4488 The first three are reserved.
4490 For static executables, we don't reserve anything. */
4492 if (plt
== htab
->elf
.splt
)
4494 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4495 got_offset
= (got_offset
+ 3) * 4;
4499 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4500 got_offset
= got_offset
* 4;
4503 /* Fill in the entry in the procedure linkage table. */
4506 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4507 abed
->plt
->plt_entry_size
);
4508 bfd_put_32 (output_bfd
,
4509 (gotplt
->output_section
->vma
4510 + gotplt
->output_offset
4512 plt
->contents
+ h
->plt
.offset
4513 + abed
->plt
->plt_got_offset
);
4515 if (abed
->is_vxworks
)
4517 int s
, k
, reloc_index
;
4519 /* Create the R_386_32 relocation referencing the GOT
4520 for this PLT entry. */
4522 /* S: Current slot number (zero-based). */
4523 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4524 / abed
->plt
->plt_entry_size
);
4525 /* K: Number of relocations for PLTResolve. */
4527 k
= PLTRESOLVE_RELOCS_SHLIB
;
4529 k
= PLTRESOLVE_RELOCS
;
4530 /* Skip the PLTresolve relocations, and the relocations for
4531 the other PLT slots. */
4532 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4533 loc
= (htab
->srelplt2
->contents
+ reloc_index
4534 * sizeof (Elf32_External_Rel
));
4536 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4537 + htab
->elf
.splt
->output_offset
4538 + h
->plt
.offset
+ 2),
4539 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4540 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4542 /* Create the R_386_32 relocation referencing the beginning of
4543 the PLT for this GOT entry. */
4544 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4545 + htab
->elf
.sgotplt
->output_offset
4547 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4548 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4549 loc
+ sizeof (Elf32_External_Rel
));
4554 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4555 abed
->plt
->plt_entry_size
);
4556 bfd_put_32 (output_bfd
, got_offset
,
4557 plt
->contents
+ h
->plt
.offset
4558 + abed
->plt
->plt_got_offset
);
4561 /* Fill in the entry in the global offset table. */
4562 bfd_put_32 (output_bfd
,
4563 (plt
->output_section
->vma
4564 + plt
->output_offset
4566 + abed
->plt
->plt_lazy_offset
),
4567 gotplt
->contents
+ got_offset
);
4569 /* Fill in the entry in the .rel.plt section. */
4570 rel
.r_offset
= (gotplt
->output_section
->vma
4571 + gotplt
->output_offset
4573 if (h
->dynindx
== -1
4574 || ((info
->executable
4575 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4577 && h
->type
== STT_GNU_IFUNC
))
4579 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4580 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4581 in the .got.plt section. */
4582 bfd_put_32 (output_bfd
,
4583 (h
->root
.u
.def
.value
4584 + h
->root
.u
.def
.section
->output_section
->vma
4585 + h
->root
.u
.def
.section
->output_offset
),
4586 gotplt
->contents
+ got_offset
);
4587 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4588 /* R_386_IRELATIVE comes last. */
4589 plt_index
= htab
->next_irelative_index
--;
4593 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4594 plt_index
= htab
->next_jump_slot_index
++;
4596 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4597 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4599 /* Don't fill PLT entry for static executables. */
4600 if (plt
== htab
->elf
.splt
)
4602 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4603 plt
->contents
+ h
->plt
.offset
4604 + abed
->plt
->plt_reloc_offset
);
4605 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4606 + abed
->plt
->plt_plt_offset
+ 4),
4607 plt
->contents
+ h
->plt
.offset
4608 + abed
->plt
->plt_plt_offset
);
4611 if (!h
->def_regular
)
4613 /* Mark the symbol as undefined, rather than as defined in
4614 the .plt section. Leave the value if there were any
4615 relocations where pointer equality matters (this is a clue
4616 for the dynamic linker, to make function pointer
4617 comparisons work between an application and shared
4618 library), otherwise set it to zero. If a function is only
4619 called from a binary, there is no need to slow down
4620 shared libraries because of that. */
4621 sym
->st_shndx
= SHN_UNDEF
;
4622 if (!h
->pointer_equality_needed
)
4627 if (h
->got
.offset
!= (bfd_vma
) -1
4628 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4629 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4631 Elf_Internal_Rela rel
;
4633 /* This symbol has an entry in the global offset table. Set it
4636 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4639 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4640 + htab
->elf
.sgot
->output_offset
4641 + (h
->got
.offset
& ~(bfd_vma
) 1));
4643 /* If this is a static link, or it is a -Bsymbolic link and the
4644 symbol is defined locally or was forced to be local because
4645 of a version file, we just want to emit a RELATIVE reloc.
4646 The entry in the global offset table will already have been
4647 initialized in the relocate_section function. */
4649 && h
->type
== STT_GNU_IFUNC
)
4653 /* Generate R_386_GLOB_DAT. */
4660 if (!h
->pointer_equality_needed
)
4663 /* For non-shared object, we can't use .got.plt, which
4664 contains the real function addres if we need pointer
4665 equality. We load the GOT entry with the PLT entry. */
4666 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4667 bfd_put_32 (output_bfd
,
4668 (plt
->output_section
->vma
4669 + plt
->output_offset
+ h
->plt
.offset
),
4670 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4674 else if (info
->shared
4675 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4677 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4678 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4682 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4684 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4685 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4686 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4689 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4694 Elf_Internal_Rela rel
;
4696 /* This symbol needs a copy reloc. Set it up. */
4698 if (h
->dynindx
== -1
4699 || (h
->root
.type
!= bfd_link_hash_defined
4700 && h
->root
.type
!= bfd_link_hash_defweak
)
4701 || htab
->srelbss
== NULL
)
4704 rel
.r_offset
= (h
->root
.u
.def
.value
4705 + h
->root
.u
.def
.section
->output_section
->vma
4706 + h
->root
.u
.def
.section
->output_offset
);
4707 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4708 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4714 /* Finish up local dynamic symbol handling. We set the contents of
4715 various dynamic sections here. */
4718 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4720 struct elf_link_hash_entry
*h
4721 = (struct elf_link_hash_entry
*) *slot
;
4722 struct bfd_link_info
*info
4723 = (struct bfd_link_info
*) inf
;
4725 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4729 /* Used to decide how to sort relocs in an optimal manner for the
4730 dynamic linker, before writing them out. */
4732 static enum elf_reloc_type_class
4733 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4735 switch (ELF32_R_TYPE (rela
->r_info
))
4737 case R_386_RELATIVE
:
4738 return reloc_class_relative
;
4739 case R_386_JUMP_SLOT
:
4740 return reloc_class_plt
;
4742 return reloc_class_copy
;
4744 return reloc_class_normal
;
4748 /* Finish up the dynamic sections. */
4751 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4752 struct bfd_link_info
*info
)
4754 struct elf_i386_link_hash_table
*htab
;
4757 const struct elf_i386_backend_data
*abed
;
4759 htab
= elf_i386_hash_table (info
);
4763 dynobj
= htab
->elf
.dynobj
;
4764 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4765 abed
= get_elf_i386_backend_data (output_bfd
);
4767 if (htab
->elf
.dynamic_sections_created
)
4769 Elf32_External_Dyn
*dyncon
, *dynconend
;
4771 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4774 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4775 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4776 for (; dyncon
< dynconend
; dyncon
++)
4778 Elf_Internal_Dyn dyn
;
4781 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4786 if (abed
->is_vxworks
4787 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4792 s
= htab
->elf
.sgotplt
;
4793 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4797 s
= htab
->elf
.srelplt
;
4798 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4802 s
= htab
->elf
.srelplt
;
4803 dyn
.d_un
.d_val
= s
->size
;
4807 /* My reading of the SVR4 ABI indicates that the
4808 procedure linkage table relocs (DT_JMPREL) should be
4809 included in the overall relocs (DT_REL). This is
4810 what Solaris does. However, UnixWare can not handle
4811 that case. Therefore, we override the DT_RELSZ entry
4812 here to make it not include the JMPREL relocs. */
4813 s
= htab
->elf
.srelplt
;
4816 dyn
.d_un
.d_val
-= s
->size
;
4820 /* We may not be using the standard ELF linker script.
4821 If .rel.plt is the first .rel section, we adjust
4822 DT_REL to not include it. */
4823 s
= htab
->elf
.srelplt
;
4826 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4828 dyn
.d_un
.d_ptr
+= s
->size
;
4832 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4835 /* Fill in the first entry in the procedure linkage table. */
4836 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4840 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4841 abed
->plt
->plt0_entry_size
);
4842 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4843 abed
->plt0_pad_byte
,
4844 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4848 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4849 abed
->plt
->plt0_entry_size
);
4850 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4851 abed
->plt0_pad_byte
,
4852 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4853 bfd_put_32 (output_bfd
,
4854 (htab
->elf
.sgotplt
->output_section
->vma
4855 + htab
->elf
.sgotplt
->output_offset
4857 htab
->elf
.splt
->contents
4858 + abed
->plt
->plt0_got1_offset
);
4859 bfd_put_32 (output_bfd
,
4860 (htab
->elf
.sgotplt
->output_section
->vma
4861 + htab
->elf
.sgotplt
->output_offset
4863 htab
->elf
.splt
->contents
4864 + abed
->plt
->plt0_got2_offset
);
4866 if (abed
->is_vxworks
)
4868 Elf_Internal_Rela rel
;
4870 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4871 On IA32 we use REL relocations so the addend goes in
4872 the PLT directly. */
4873 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4874 + htab
->elf
.splt
->output_offset
4875 + abed
->plt
->plt0_got1_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 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4880 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4881 + htab
->elf
.splt
->output_offset
4882 + abed
->plt
->plt0_got2_offset
);
4883 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4884 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4885 htab
->srelplt2
->contents
+
4886 sizeof (Elf32_External_Rel
));
4890 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4891 really seem like the right value. */
4892 elf_section_data (htab
->elf
.splt
->output_section
)
4893 ->this_hdr
.sh_entsize
= 4;
4895 /* Correct the .rel.plt.unloaded relocations. */
4896 if (abed
->is_vxworks
&& !info
->shared
)
4898 int num_plts
= (htab
->elf
.splt
->size
4899 / abed
->plt
->plt_entry_size
) - 1;
4902 p
= htab
->srelplt2
->contents
;
4904 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4906 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4908 for (; num_plts
; num_plts
--)
4910 Elf_Internal_Rela rel
;
4911 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4912 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4913 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4914 p
+= sizeof (Elf32_External_Rel
);
4916 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4917 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4918 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4919 p
+= sizeof (Elf32_External_Rel
);
4925 if (htab
->elf
.sgotplt
)
4927 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4929 (*_bfd_error_handler
)
4930 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4934 /* Fill in the first three entries in the global offset table. */
4935 if (htab
->elf
.sgotplt
->size
> 0)
4937 bfd_put_32 (output_bfd
,
4939 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4940 htab
->elf
.sgotplt
->contents
);
4941 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4942 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4945 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4948 /* Adjust .eh_frame for .plt section. */
4949 if (htab
->plt_eh_frame
!= NULL
4950 && htab
->plt_eh_frame
->contents
!= NULL
)
4952 if (htab
->elf
.splt
!= NULL
4953 && htab
->elf
.splt
->size
!= 0
4954 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4955 && htab
->elf
.splt
->output_section
!= NULL
4956 && htab
->plt_eh_frame
->output_section
!= NULL
)
4958 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4959 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4960 + htab
->plt_eh_frame
->output_offset
4961 + PLT_FDE_START_OFFSET
;
4962 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4963 htab
->plt_eh_frame
->contents
4964 + PLT_FDE_START_OFFSET
);
4966 if (htab
->plt_eh_frame
->sec_info_type
4967 == SEC_INFO_TYPE_EH_FRAME
)
4969 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4971 htab
->plt_eh_frame
->contents
))
4976 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
4977 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
4979 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4980 htab_traverse (htab
->loc_hash_table
,
4981 elf_i386_finish_local_dynamic_symbol
,
4987 /* Return address for Ith PLT stub in section PLT, for relocation REL
4988 or (bfd_vma) -1 if it should not be included. */
4991 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
4992 const arelent
*rel ATTRIBUTE_UNUSED
)
4994 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
4997 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5000 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5002 if (h
->plt
.offset
!= (bfd_vma
) -1
5004 && !h
->pointer_equality_needed
)
5007 return _bfd_elf_hash_symbol (h
);
5010 /* Hook called by the linker routine which adds symbols from an object
5014 elf_i386_add_symbol_hook (bfd
* abfd
,
5015 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5016 Elf_Internal_Sym
* sym
,
5017 const char ** namep ATTRIBUTE_UNUSED
,
5018 flagword
* flagsp ATTRIBUTE_UNUSED
,
5019 asection
** secp ATTRIBUTE_UNUSED
,
5020 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5022 if ((abfd
->flags
& DYNAMIC
) == 0
5023 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5024 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5025 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5030 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5031 #define TARGET_LITTLE_NAME "elf32-i386"
5032 #define ELF_ARCH bfd_arch_i386
5033 #define ELF_TARGET_ID I386_ELF_DATA
5034 #define ELF_MACHINE_CODE EM_386
5035 #define ELF_MAXPAGESIZE 0x1000
5037 #define elf_backend_can_gc_sections 1
5038 #define elf_backend_can_refcount 1
5039 #define elf_backend_want_got_plt 1
5040 #define elf_backend_plt_readonly 1
5041 #define elf_backend_want_plt_sym 0
5042 #define elf_backend_got_header_size 12
5043 #define elf_backend_plt_alignment 4
5045 /* Support RELA for objdump of prelink objects. */
5046 #define elf_info_to_howto elf_i386_info_to_howto_rel
5047 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5049 #define bfd_elf32_mkobject elf_i386_mkobject
5051 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5052 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5053 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5054 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5055 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5057 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5058 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5059 #define elf_backend_check_relocs elf_i386_check_relocs
5060 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5061 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5062 #define elf_backend_fake_sections elf_i386_fake_sections
5063 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5064 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5065 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5066 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5067 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5068 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5069 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5070 #define elf_backend_relocate_section elf_i386_relocate_section
5071 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5072 #define elf_backend_always_size_sections elf_i386_always_size_sections
5073 #define elf_backend_omit_section_dynsym \
5074 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5075 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5076 #define elf_backend_hash_symbol elf_i386_hash_symbol
5077 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5078 #undef elf_backend_post_process_headers
5079 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5081 #include "elf32-target.h"
5083 /* FreeBSD support. */
5085 #undef TARGET_LITTLE_SYM
5086 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5087 #undef TARGET_LITTLE_NAME
5088 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5090 #define ELF_OSABI ELFOSABI_FREEBSD
5092 /* The kernel recognizes executables as valid only if they carry a
5093 "FreeBSD" label in the ELF header. So we put this label on all
5094 executables and (for simplicity) also all other object files. */
5097 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5099 _bfd_elf_set_osabi (abfd
, info
);
5101 #ifdef OLD_FREEBSD_ABI_LABEL
5102 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5103 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5107 #undef elf_backend_post_process_headers
5108 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5110 #define elf32_bed elf32_i386_fbsd_bed
5112 #undef elf_backend_add_symbol_hook
5114 #include "elf32-target.h"
5118 #undef TARGET_LITTLE_SYM
5119 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5120 #undef TARGET_LITTLE_NAME
5121 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5123 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5124 objects won't be recognized. */
5128 #define elf32_bed elf32_i386_sol2_bed
5130 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5132 #undef elf_backend_static_tls_alignment
5133 #define elf_backend_static_tls_alignment 8
5135 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5137 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5139 #undef elf_backend_want_plt_sym
5140 #define elf_backend_want_plt_sym 1
5142 #include "elf32-target.h"
5144 /* Native Client support. */
5146 #undef TARGET_LITTLE_SYM
5147 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5148 #undef TARGET_LITTLE_NAME
5149 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5151 #define elf32_bed elf32_i386_nacl_bed
5153 #undef ELF_MAXPAGESIZE
5154 #define ELF_MAXPAGESIZE 0x10000
5156 /* Restore defaults. */
5158 #undef elf_backend_want_plt_sym
5159 #define elf_backend_want_plt_sym 0
5160 #undef elf_backend_post_process_headers
5161 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5162 #undef elf_backend_static_tls_alignment
5164 /* NaCl uses substantially different PLT entries for the same effects. */
5166 #undef elf_backend_plt_alignment
5167 #define elf_backend_plt_alignment 5
5168 #define NACL_PLT_ENTRY_SIZE 64
5169 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5171 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5173 0xff, 0x35, /* pushl contents of address */
5174 0, 0, 0, 0, /* replaced with address of .got + 4. */
5175 0x8b, 0x0d, /* movl contents of address, %ecx */
5176 0, 0, 0, 0, /* replaced with address of .got + 8. */
5177 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5178 0xff, 0xe1 /* jmp *%ecx */
5181 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5183 0x8b, 0x0d, /* movl contents of address, %ecx */
5184 0, 0, 0, 0, /* replaced with GOT slot address. */
5185 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5186 0xff, 0xe1, /* jmp *%ecx */
5188 /* Pad to the next 32-byte boundary with nop instructions. */
5190 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5191 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5193 /* Lazy GOT entries point here (32-byte aligned). */
5194 0x68, /* pushl immediate */
5195 0, 0, 0, 0, /* replaced with reloc offset. */
5196 0xe9, /* jmp relative */
5197 0, 0, 0, 0, /* replaced with offset to .plt. */
5199 /* Pad to the next 32-byte boundary with nop instructions. */
5200 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5201 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5205 static const bfd_byte
5206 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5208 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5209 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5210 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5211 0xff, 0xe1, /* jmp *%ecx */
5213 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5214 so pad to that size with nop instructions. */
5215 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5218 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5220 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5221 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5222 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5223 0xff, 0xe1, /* jmp *%ecx */
5225 /* Pad to the next 32-byte boundary with nop instructions. */
5227 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5228 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5230 /* Lazy GOT entries point here (32-byte aligned). */
5231 0x68, /* pushl immediate */
5232 0, 0, 0, 0, /* replaced with offset into relocation table. */
5233 0xe9, /* jmp relative */
5234 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5236 /* Pad to the next 32-byte boundary with nop instructions. */
5237 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5238 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5242 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5244 #if (PLT_CIE_LENGTH != 20 \
5245 || PLT_FDE_LENGTH != 36 \
5246 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5247 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5248 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5250 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5251 0, 0, 0, 0, /* CIE ID */
5252 1, /* CIE version */
5253 'z', 'R', 0, /* Augmentation string */
5254 1, /* Code alignment factor */
5255 0x7c, /* Data alignment factor: -4 */
5256 8, /* Return address column */
5257 1, /* Augmentation size */
5258 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5259 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5260 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5261 DW_CFA_nop
, DW_CFA_nop
,
5263 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5264 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5265 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5266 0, 0, 0, 0, /* .plt size goes here */
5267 0, /* Augmentation size */
5268 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5269 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5270 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5271 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5272 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5273 13, /* Block length */
5274 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5275 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5276 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5277 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5278 DW_CFA_nop
, DW_CFA_nop
5281 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5283 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5284 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5285 2, /* plt0_got1_offset */
5286 8, /* plt0_got2_offset */
5287 elf_i386_nacl_plt_entry
, /* plt_entry */
5288 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5289 2, /* plt_got_offset */
5290 33, /* plt_reloc_offset */
5291 38, /* plt_plt_offset */
5292 32, /* plt_lazy_offset */
5293 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5294 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5295 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5296 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5299 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5301 &elf_i386_nacl_plt
, /* plt */
5302 0x90, /* plt0_pad_byte: nop insn */
5306 #undef elf_backend_arch_data
5307 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5309 #undef elf_backend_modify_segment_map
5310 #define elf_backend_modify_segment_map nacl_modify_segment_map
5311 #undef elf_backend_modify_program_headers
5312 #define elf_backend_modify_program_headers nacl_modify_program_headers
5314 #include "elf32-target.h"
5316 /* Restore defaults. */
5317 #undef elf_backend_modify_segment_map
5318 #undef elf_backend_modify_program_headers
5320 /* VxWorks support. */
5322 #undef TARGET_LITTLE_SYM
5323 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5324 #undef TARGET_LITTLE_NAME
5325 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5327 #undef elf_backend_plt_alignment
5328 #define elf_backend_plt_alignment 4
5330 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5332 &elf_i386_plt
, /* plt */
5333 0x90, /* plt0_pad_byte */
5337 #undef elf_backend_arch_data
5338 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5340 #undef elf_backend_relocs_compatible
5341 #undef elf_backend_post_process_headers
5342 #undef elf_backend_add_symbol_hook
5343 #define elf_backend_add_symbol_hook \
5344 elf_vxworks_add_symbol_hook
5345 #undef elf_backend_link_output_symbol_hook
5346 #define elf_backend_link_output_symbol_hook \
5347 elf_vxworks_link_output_symbol_hook
5348 #undef elf_backend_emit_relocs
5349 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5350 #undef elf_backend_final_write_processing
5351 #define elf_backend_final_write_processing \
5352 elf_vxworks_final_write_processing
5353 #undef elf_backend_static_tls_alignment
5355 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5357 #undef elf_backend_want_plt_sym
5358 #define elf_backend_want_plt_sym 1
5361 #define elf32_bed elf32_i386_vxworks_bed
5363 #include "elf32-target.h"