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 /* Since pc_count for TLS symbol can only have size relocations and
2362 we always resolve size relocation against non-zero TLS symbol, we
2363 clear pc_count for non-zero TLS symbol. */
2364 if (h
->type
== STT_TLS
&& h
->size
!= 0)
2366 struct elf_dyn_relocs
**pp
;
2368 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2370 p
->count
-= p
->pc_count
;
2379 /* In the shared -Bsymbolic case, discard space allocated for
2380 dynamic pc-relative relocs against symbols which turn out to be
2381 defined in regular objects. For the normal shared case, discard
2382 space for pc-relative relocs that have become local due to symbol
2383 visibility changes. */
2387 /* The only reloc that uses pc_count is R_386_PC32, which will
2388 appear on a call or on something like ".long foo - .". We
2389 want calls to protected symbols to resolve directly to the
2390 function rather than going via the plt. If people want
2391 function pointer comparisons to work as expected then they
2392 should avoid writing assembly like ".long foo - .". */
2393 if (SYMBOL_CALLS_LOCAL (info
, h
))
2395 struct elf_dyn_relocs
**pp
;
2397 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2399 p
->count
-= p
->pc_count
;
2408 if (get_elf_i386_backend_data (info
->output_bfd
)->is_vxworks
)
2410 struct elf_dyn_relocs
**pp
;
2411 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
2413 if (strcmp (p
->sec
->output_section
->name
, ".tls_vars") == 0)
2420 /* Also discard relocs on undefined weak syms with non-default
2422 if (eh
->dyn_relocs
!= NULL
2423 && h
->root
.type
== bfd_link_hash_undefweak
)
2425 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
2426 eh
->dyn_relocs
= NULL
;
2428 /* Make sure undefined weak symbols are output as a dynamic
2430 else if (h
->dynindx
== -1
2431 && !h
->forced_local
)
2433 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2438 else if (ELIMINATE_COPY_RELOCS
)
2440 /* For the non-shared case, discard space for relocs against
2441 symbols which turn out to need copy relocs or are not
2447 || (htab
->elf
.dynamic_sections_created
2448 && (h
->root
.type
== bfd_link_hash_undefweak
2449 || h
->root
.type
== bfd_link_hash_undefined
))))
2451 /* Make sure this symbol is output as a dynamic symbol.
2452 Undefined weak syms won't yet be marked as dynamic. */
2453 if (h
->dynindx
== -1
2454 && !h
->forced_local
)
2456 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
2460 /* If that succeeded, we know we'll be keeping all the
2462 if (h
->dynindx
!= -1)
2466 eh
->dyn_relocs
= NULL
;
2471 /* Finally, allocate space. */
2472 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2476 sreloc
= elf_section_data (p
->sec
)->sreloc
;
2478 BFD_ASSERT (sreloc
!= NULL
);
2479 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2485 /* Allocate space in .plt, .got and associated reloc sections for
2486 local dynamic relocs. */
2489 elf_i386_allocate_local_dynrelocs (void **slot
, void *inf
)
2491 struct elf_link_hash_entry
*h
2492 = (struct elf_link_hash_entry
*) *slot
;
2494 if (h
->type
!= STT_GNU_IFUNC
2498 || h
->root
.type
!= bfd_link_hash_defined
)
2501 return elf_i386_allocate_dynrelocs (h
, inf
);
2504 /* Find any dynamic relocs that apply to read-only sections. */
2507 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
2509 struct elf_i386_link_hash_entry
*eh
;
2510 struct elf_dyn_relocs
*p
;
2512 /* Skip local IFUNC symbols. */
2513 if (h
->forced_local
&& h
->type
== STT_GNU_IFUNC
)
2516 eh
= (struct elf_i386_link_hash_entry
*) h
;
2517 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
2519 asection
*s
= p
->sec
->output_section
;
2521 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
2523 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2525 info
->flags
|= DF_TEXTREL
;
2527 if (info
->warn_shared_textrel
&& info
->shared
)
2528 info
->callbacks
->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"),
2529 p
->sec
->owner
, h
->root
.root
.string
,
2532 /* Not an error, just cut short the traversal. */
2540 mov foo@GOT(%reg), %reg
2542 lea foo@GOTOFF(%reg), %reg
2543 with the local symbol, foo. */
2546 elf_i386_convert_mov_to_lea (bfd
*abfd
, asection
*sec
,
2547 struct bfd_link_info
*link_info
)
2549 Elf_Internal_Shdr
*symtab_hdr
;
2550 Elf_Internal_Rela
*internal_relocs
;
2551 Elf_Internal_Rela
*irel
, *irelend
;
2553 struct elf_i386_link_hash_table
*htab
;
2554 bfd_boolean changed_contents
;
2555 bfd_boolean changed_relocs
;
2556 bfd_signed_vma
*local_got_refcounts
;
2558 /* Don't even try to convert non-ELF outputs. */
2559 if (!is_elf_hash_table (link_info
->hash
))
2562 /* Nothing to do if there are no codes, no relocations or no output. */
2563 if ((sec
->flags
& (SEC_CODE
| SEC_RELOC
)) != (SEC_CODE
| SEC_RELOC
)
2564 || sec
->reloc_count
== 0
2565 || discarded_section (sec
))
2568 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
2570 /* Load the relocations for this section. */
2571 internal_relocs
= (_bfd_elf_link_read_relocs
2572 (abfd
, sec
, NULL
, (Elf_Internal_Rela
*) NULL
,
2573 link_info
->keep_memory
));
2574 if (internal_relocs
== NULL
)
2577 htab
= elf_i386_hash_table (link_info
);
2578 changed_contents
= FALSE
;
2579 changed_relocs
= FALSE
;
2580 local_got_refcounts
= elf_local_got_refcounts (abfd
);
2582 /* Get the section contents. */
2583 if (elf_section_data (sec
)->this_hdr
.contents
!= NULL
)
2584 contents
= elf_section_data (sec
)->this_hdr
.contents
;
2587 if (!bfd_malloc_and_get_section (abfd
, sec
, &contents
))
2591 irelend
= internal_relocs
+ sec
->reloc_count
;
2592 for (irel
= internal_relocs
; irel
< irelend
; irel
++)
2594 unsigned int r_type
= ELF32_R_TYPE (irel
->r_info
);
2595 unsigned int r_symndx
= ELF32_R_SYM (irel
->r_info
);
2597 struct elf_link_hash_entry
*h
;
2599 if (r_type
!= R_386_GOT32
)
2602 /* Get the symbol referred to by the reloc. */
2603 if (r_symndx
< symtab_hdr
->sh_info
)
2605 Elf_Internal_Sym
*isym
;
2607 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2610 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */
2611 if (ELF_ST_TYPE (isym
->st_info
) != STT_GNU_IFUNC
2612 && bfd_get_8 (input_bfd
,
2613 contents
+ irel
->r_offset
- 2) == 0x8b)
2615 bfd_put_8 (output_bfd
, 0x8d,
2616 contents
+ irel
->r_offset
- 2);
2617 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2618 if (local_got_refcounts
!= NULL
2619 && local_got_refcounts
[r_symndx
] > 0)
2620 local_got_refcounts
[r_symndx
] -= 1;
2621 changed_contents
= TRUE
;
2622 changed_relocs
= TRUE
;
2627 indx
= r_symndx
- symtab_hdr
->sh_info
;
2628 h
= elf_sym_hashes (abfd
)[indx
];
2629 BFD_ASSERT (h
!= NULL
);
2631 while (h
->root
.type
== bfd_link_hash_indirect
2632 || h
->root
.type
== bfd_link_hash_warning
)
2633 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
2635 /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid
2636 optimizing _DYNAMIC since ld.so may use its link-time address. */
2638 && h
->type
!= STT_GNU_IFUNC
2639 && h
!= htab
->elf
.hdynamic
2640 && SYMBOL_REFERENCES_LOCAL (link_info
, h
)
2641 && bfd_get_8 (input_bfd
,
2642 contents
+ irel
->r_offset
- 2) == 0x8b)
2644 bfd_put_8 (output_bfd
, 0x8d,
2645 contents
+ irel
->r_offset
- 2);
2646 irel
->r_info
= ELF32_R_INFO (r_symndx
, R_386_GOTOFF
);
2647 if (h
->got
.refcount
> 0)
2648 h
->got
.refcount
-= 1;
2649 changed_contents
= TRUE
;
2650 changed_relocs
= TRUE
;
2654 if (contents
!= NULL
2655 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2657 if (!changed_contents
&& !link_info
->keep_memory
)
2661 /* Cache the section contents for elf_link_input_bfd. */
2662 elf_section_data (sec
)->this_hdr
.contents
= contents
;
2666 if (elf_section_data (sec
)->relocs
!= internal_relocs
)
2668 if (!changed_relocs
)
2669 free (internal_relocs
);
2671 elf_section_data (sec
)->relocs
= internal_relocs
;
2677 if (contents
!= NULL
2678 && elf_section_data (sec
)->this_hdr
.contents
!= contents
)
2680 if (internal_relocs
!= NULL
2681 && elf_section_data (sec
)->relocs
!= internal_relocs
)
2682 free (internal_relocs
);
2686 /* Set the sizes of the dynamic sections. */
2689 elf_i386_size_dynamic_sections (bfd
*output_bfd
, struct bfd_link_info
*info
)
2691 struct elf_i386_link_hash_table
*htab
;
2697 htab
= elf_i386_hash_table (info
);
2700 dynobj
= htab
->elf
.dynobj
;
2704 if (htab
->elf
.dynamic_sections_created
)
2706 /* Set the contents of the .interp section to the interpreter. */
2707 if (info
->executable
)
2709 s
= bfd_get_linker_section (dynobj
, ".interp");
2712 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2713 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2717 /* Set up .got offsets for local syms, and space for local dynamic
2719 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2721 bfd_signed_vma
*local_got
;
2722 bfd_signed_vma
*end_local_got
;
2723 char *local_tls_type
;
2724 bfd_vma
*local_tlsdesc_gotent
;
2725 bfd_size_type locsymcount
;
2726 Elf_Internal_Shdr
*symtab_hdr
;
2729 if (! is_i386_elf (ibfd
))
2732 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2734 struct elf_dyn_relocs
*p
;
2736 if (!elf_i386_convert_mov_to_lea (ibfd
, s
, info
))
2739 for (p
= ((struct elf_dyn_relocs
*)
2740 elf_section_data (s
)->local_dynrel
);
2744 if (!bfd_is_abs_section (p
->sec
)
2745 && bfd_is_abs_section (p
->sec
->output_section
))
2747 /* Input section has been discarded, either because
2748 it is a copy of a linkonce section or due to
2749 linker script /DISCARD/, so we'll be discarding
2752 else if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
2753 && strcmp (p
->sec
->output_section
->name
,
2756 /* Relocations in vxworks .tls_vars sections are
2757 handled specially by the loader. */
2759 else if (p
->count
!= 0)
2761 srel
= elf_section_data (p
->sec
)->sreloc
;
2762 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
2763 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0
2764 && (info
->flags
& DF_TEXTREL
) == 0)
2766 info
->flags
|= DF_TEXTREL
;
2767 if (info
->warn_shared_textrel
&& info
->shared
)
2768 info
->callbacks
->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"),
2769 p
->sec
->owner
, p
->sec
);
2775 local_got
= elf_local_got_refcounts (ibfd
);
2779 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2780 locsymcount
= symtab_hdr
->sh_info
;
2781 end_local_got
= local_got
+ locsymcount
;
2782 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
2783 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
2785 srel
= htab
->elf
.srelgot
;
2786 for (; local_got
< end_local_got
;
2787 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
2789 *local_tlsdesc_gotent
= (bfd_vma
) -1;
2792 if (GOT_TLS_GDESC_P (*local_tls_type
))
2794 *local_tlsdesc_gotent
= htab
->elf
.sgotplt
->size
2795 - elf_i386_compute_jump_table_size (htab
);
2796 htab
->elf
.sgotplt
->size
+= 8;
2797 *local_got
= (bfd_vma
) -2;
2799 if (! GOT_TLS_GDESC_P (*local_tls_type
)
2800 || GOT_TLS_GD_P (*local_tls_type
))
2802 *local_got
= s
->size
;
2804 if (GOT_TLS_GD_P (*local_tls_type
)
2805 || *local_tls_type
== GOT_TLS_IE_BOTH
)
2809 || GOT_TLS_GD_ANY_P (*local_tls_type
)
2810 || (*local_tls_type
& GOT_TLS_IE
))
2812 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
2813 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
2814 else if (GOT_TLS_GD_P (*local_tls_type
)
2815 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2816 srel
->size
+= sizeof (Elf32_External_Rel
);
2817 if (GOT_TLS_GDESC_P (*local_tls_type
))
2818 htab
->elf
.srelplt
->size
+= sizeof (Elf32_External_Rel
);
2822 *local_got
= (bfd_vma
) -1;
2826 if (htab
->tls_ldm_got
.refcount
> 0)
2828 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2830 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2831 htab
->elf
.sgot
->size
+= 8;
2832 htab
->elf
.srelgot
->size
+= sizeof (Elf32_External_Rel
);
2835 htab
->tls_ldm_got
.offset
= -1;
2837 /* Allocate global sym .plt and .got entries, and space for global
2838 sym dynamic relocs. */
2839 elf_link_hash_traverse (&htab
->elf
, elf_i386_allocate_dynrelocs
, info
);
2841 /* Allocate .plt and .got entries, and space for local symbols. */
2842 htab_traverse (htab
->loc_hash_table
,
2843 elf_i386_allocate_local_dynrelocs
,
2846 /* For every jump slot reserved in the sgotplt, reloc_count is
2847 incremented. However, when we reserve space for TLS descriptors,
2848 it's not incremented, so in order to compute the space reserved
2849 for them, it suffices to multiply the reloc count by the jump
2852 PR ld/13302: We start next_irelative_index at the end of .rela.plt
2853 so that R_386_IRELATIVE entries come last. */
2854 if (htab
->elf
.srelplt
)
2856 htab
->next_tls_desc_index
= htab
->elf
.srelplt
->reloc_count
;
2857 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2858 htab
->next_irelative_index
= htab
->elf
.srelplt
->reloc_count
- 1;
2860 else if (htab
->elf
.irelplt
)
2861 htab
->next_irelative_index
= htab
->elf
.irelplt
->reloc_count
- 1;
2864 if (htab
->elf
.sgotplt
)
2866 /* Don't allocate .got.plt section if there are no GOT nor PLT
2867 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
2868 if ((htab
->elf
.hgot
== NULL
2869 || !htab
->elf
.hgot
->ref_regular_nonweak
)
2870 && (htab
->elf
.sgotplt
->size
2871 == get_elf_backend_data (output_bfd
)->got_header_size
)
2872 && (htab
->elf
.splt
== NULL
2873 || htab
->elf
.splt
->size
== 0)
2874 && (htab
->elf
.sgot
== NULL
2875 || htab
->elf
.sgot
->size
== 0)
2876 && (htab
->elf
.iplt
== NULL
2877 || htab
->elf
.iplt
->size
== 0)
2878 && (htab
->elf
.igotplt
== NULL
2879 || htab
->elf
.igotplt
->size
== 0))
2880 htab
->elf
.sgotplt
->size
= 0;
2884 if (htab
->plt_eh_frame
!= NULL
2885 && htab
->elf
.splt
!= NULL
2886 && htab
->elf
.splt
->size
!= 0
2887 && !bfd_is_abs_section (htab
->elf
.splt
->output_section
)
2888 && _bfd_elf_eh_frame_present (info
))
2889 htab
->plt_eh_frame
->size
= sizeof (elf_i386_eh_frame_plt
);
2891 /* We now have determined the sizes of the various dynamic sections.
2892 Allocate memory for them. */
2894 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2896 bfd_boolean strip_section
= TRUE
;
2898 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2901 if (s
== htab
->elf
.splt
2902 || s
== htab
->elf
.sgot
)
2904 /* Strip this section if we don't need it; see the
2906 /* We'd like to strip these sections if they aren't needed, but if
2907 we've exported dynamic symbols from them we must leave them.
2908 It's too late to tell BFD to get rid of the symbols. */
2910 if (htab
->elf
.hplt
!= NULL
)
2911 strip_section
= FALSE
;
2913 else if (s
== htab
->elf
.sgotplt
2914 || s
== htab
->elf
.iplt
2915 || s
== htab
->elf
.igotplt
2916 || s
== htab
->plt_eh_frame
2917 || s
== htab
->sdynbss
)
2919 /* Strip these too. */
2921 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rel"))
2924 && s
!= htab
->elf
.srelplt
2925 && s
!= htab
->srelplt2
)
2928 /* We use the reloc_count field as a counter if we need
2929 to copy relocs into the output file. */
2934 /* It's not one of our sections, so don't allocate space. */
2940 /* If we don't need this section, strip it from the
2941 output file. This is mostly to handle .rel.bss and
2942 .rel.plt. We must create both sections in
2943 create_dynamic_sections, because they must be created
2944 before the linker maps input sections to output
2945 sections. The linker does that before
2946 adjust_dynamic_symbol is called, and it is that
2947 function which decides whether anything needs to go
2948 into these sections. */
2950 s
->flags
|= SEC_EXCLUDE
;
2954 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2957 /* Allocate memory for the section contents. We use bfd_zalloc
2958 here in case unused entries are not reclaimed before the
2959 section's contents are written out. This should not happen,
2960 but this way if it does, we get a R_386_NONE reloc instead
2962 s
->contents
= (unsigned char *) bfd_zalloc (dynobj
, s
->size
);
2963 if (s
->contents
== NULL
)
2967 if (htab
->plt_eh_frame
!= NULL
2968 && htab
->plt_eh_frame
->contents
!= NULL
)
2970 memcpy (htab
->plt_eh_frame
->contents
, elf_i386_eh_frame_plt
,
2971 sizeof (elf_i386_eh_frame_plt
));
2972 bfd_put_32 (dynobj
, htab
->elf
.splt
->size
,
2973 htab
->plt_eh_frame
->contents
+ PLT_FDE_LEN_OFFSET
);
2976 if (htab
->elf
.dynamic_sections_created
)
2978 /* Add some entries to the .dynamic section. We fill in the
2979 values later, in elf_i386_finish_dynamic_sections, but we
2980 must add the entries now so that we get the correct size for
2981 the .dynamic section. The DT_DEBUG entry is filled in by the
2982 dynamic linker and used by the debugger. */
2983 #define add_dynamic_entry(TAG, VAL) \
2984 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2986 if (info
->executable
)
2988 if (!add_dynamic_entry (DT_DEBUG
, 0))
2992 if (htab
->elf
.splt
->size
!= 0)
2994 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2995 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2996 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2997 || !add_dynamic_entry (DT_JMPREL
, 0))
3003 if (!add_dynamic_entry (DT_REL
, 0)
3004 || !add_dynamic_entry (DT_RELSZ
, 0)
3005 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
3008 /* If any dynamic relocs apply to a read-only section,
3009 then we need a DT_TEXTREL entry. */
3010 if ((info
->flags
& DF_TEXTREL
) == 0)
3011 elf_link_hash_traverse (&htab
->elf
,
3012 elf_i386_readonly_dynrelocs
, info
);
3014 if ((info
->flags
& DF_TEXTREL
) != 0)
3016 if (!add_dynamic_entry (DT_TEXTREL
, 0))
3020 if (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3021 && !elf_vxworks_add_dynamic_entries (output_bfd
, info
))
3024 #undef add_dynamic_entry
3030 elf_i386_always_size_sections (bfd
*output_bfd
,
3031 struct bfd_link_info
*info
)
3033 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
3037 struct elf_link_hash_entry
*tlsbase
;
3039 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
3040 "_TLS_MODULE_BASE_",
3041 FALSE
, FALSE
, FALSE
);
3043 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
3045 struct elf_i386_link_hash_table
*htab
;
3046 struct bfd_link_hash_entry
*bh
= NULL
;
3047 const struct elf_backend_data
*bed
3048 = get_elf_backend_data (output_bfd
);
3050 htab
= elf_i386_hash_table (info
);
3054 if (!(_bfd_generic_link_add_one_symbol
3055 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
3056 tls_sec
, 0, NULL
, FALSE
,
3057 bed
->collect
, &bh
)))
3060 htab
->tls_module_base
= bh
;
3062 tlsbase
= (struct elf_link_hash_entry
*)bh
;
3063 tlsbase
->def_regular
= 1;
3064 tlsbase
->other
= STV_HIDDEN
;
3065 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
3072 /* Set the correct type for an x86 ELF section. We do this by the
3073 section name, which is a hack, but ought to work. */
3076 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
3077 Elf_Internal_Shdr
*hdr
,
3082 name
= bfd_get_section_name (abfd
, sec
);
3084 /* This is an ugly, but unfortunately necessary hack that is
3085 needed when producing EFI binaries on x86. It tells
3086 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3087 containing ELF relocation info. We need this hack in order to
3088 be able to generate ELF binaries that can be translated into
3089 EFI applications (which are essentially COFF objects). Those
3090 files contain a COFF ".reloc" section inside an ELFNN object,
3091 which would normally cause BFD to segfault because it would
3092 attempt to interpret this section as containing relocation
3093 entries for section "oc". With this hack enabled, ".reloc"
3094 will be treated as a normal data section, which will avoid the
3095 segfault. However, you won't be able to create an ELFNN binary
3096 with a section named "oc" that needs relocations, but that's
3097 the kind of ugly side-effects you get when detecting section
3098 types based on their names... In practice, this limitation is
3099 unlikely to bite. */
3100 if (strcmp (name
, ".reloc") == 0)
3101 hdr
->sh_type
= SHT_PROGBITS
;
3106 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3107 executables. Rather than setting it to the beginning of the TLS
3108 section, we have to set it to the end. This function may be called
3109 multiple times, it is idempotent. */
3112 elf_i386_set_tls_module_base (struct bfd_link_info
*info
)
3114 struct elf_i386_link_hash_table
*htab
;
3115 struct bfd_link_hash_entry
*base
;
3117 if (!info
->executable
)
3120 htab
= elf_i386_hash_table (info
);
3124 base
= htab
->tls_module_base
;
3128 base
->u
.def
.value
= htab
->elf
.tls_size
;
3131 /* Return the base VMA address which should be subtracted from real addresses
3132 when resolving @dtpoff relocation.
3133 This is PT_TLS segment p_vaddr. */
3136 elf_i386_dtpoff_base (struct bfd_link_info
*info
)
3138 /* If tls_sec is NULL, we should have signalled an error already. */
3139 if (elf_hash_table (info
)->tls_sec
== NULL
)
3141 return elf_hash_table (info
)->tls_sec
->vma
;
3144 /* Return the relocation value for @tpoff relocation
3145 if STT_TLS virtual address is ADDRESS. */
3148 elf_i386_tpoff (struct bfd_link_info
*info
, bfd_vma address
)
3150 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
3151 const struct elf_backend_data
*bed
= get_elf_backend_data (info
->output_bfd
);
3152 bfd_vma static_tls_size
;
3154 /* If tls_sec is NULL, we should have signalled an error already. */
3155 if (htab
->tls_sec
== NULL
)
3158 /* Consider special static TLS alignment requirements. */
3159 static_tls_size
= BFD_ALIGN (htab
->tls_size
, bed
->static_tls_alignment
);
3160 return static_tls_size
+ htab
->tls_sec
->vma
- address
;
3163 /* Relocate an i386 ELF section. */
3166 elf_i386_relocate_section (bfd
*output_bfd
,
3167 struct bfd_link_info
*info
,
3169 asection
*input_section
,
3171 Elf_Internal_Rela
*relocs
,
3172 Elf_Internal_Sym
*local_syms
,
3173 asection
**local_sections
)
3175 struct elf_i386_link_hash_table
*htab
;
3176 Elf_Internal_Shdr
*symtab_hdr
;
3177 struct elf_link_hash_entry
**sym_hashes
;
3178 bfd_vma
*local_got_offsets
;
3179 bfd_vma
*local_tlsdesc_gotents
;
3180 Elf_Internal_Rela
*rel
;
3181 Elf_Internal_Rela
*relend
;
3182 bfd_boolean is_vxworks_tls
;
3183 unsigned plt_entry_size
;
3185 BFD_ASSERT (is_i386_elf (input_bfd
));
3187 htab
= elf_i386_hash_table (info
);
3190 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
3191 sym_hashes
= elf_sym_hashes (input_bfd
);
3192 local_got_offsets
= elf_local_got_offsets (input_bfd
);
3193 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
3194 /* We have to handle relocations in vxworks .tls_vars sections
3195 specially, because the dynamic loader is 'weird'. */
3196 is_vxworks_tls
= (get_elf_i386_backend_data (output_bfd
)->is_vxworks
3198 && !strcmp (input_section
->output_section
->name
,
3201 elf_i386_set_tls_module_base (info
);
3203 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
3206 relend
= relocs
+ input_section
->reloc_count
;
3207 for (; rel
< relend
; rel
++)
3209 unsigned int r_type
;
3210 reloc_howto_type
*howto
;
3211 unsigned long r_symndx
;
3212 struct elf_link_hash_entry
*h
;
3213 Elf_Internal_Sym
*sym
;
3215 bfd_vma off
, offplt
;
3217 bfd_boolean unresolved_reloc
;
3218 bfd_reloc_status_type r
;
3223 r_type
= ELF32_R_TYPE (rel
->r_info
);
3224 if (r_type
== R_386_GNU_VTINHERIT
3225 || r_type
== R_386_GNU_VTENTRY
)
3228 if ((indx
= r_type
) >= R_386_standard
3229 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
3230 >= R_386_ext
- R_386_standard
)
3231 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
3232 >= R_386_irelative
- R_386_ext
))
3234 (*_bfd_error_handler
)
3235 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3236 input_bfd
, input_section
, r_type
);
3237 bfd_set_error (bfd_error_bad_value
);
3240 howto
= elf_howto_table
+ indx
;
3242 r_symndx
= ELF32_R_SYM (rel
->r_info
);
3246 unresolved_reloc
= FALSE
;
3247 if (r_symndx
< symtab_hdr
->sh_info
)
3249 sym
= local_syms
+ r_symndx
;
3250 sec
= local_sections
[r_symndx
];
3251 relocation
= (sec
->output_section
->vma
3252 + sec
->output_offset
3254 st_size
= sym
->st_size
;
3256 if (ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
3257 && ((sec
->flags
& SEC_MERGE
) != 0
3258 || (info
->relocatable
3259 && sec
->output_offset
!= 0)))
3262 bfd_byte
*where
= contents
+ rel
->r_offset
;
3264 switch (howto
->size
)
3267 addend
= bfd_get_8 (input_bfd
, where
);
3268 if (howto
->pc_relative
)
3270 addend
= (addend
^ 0x80) - 0x80;
3275 addend
= bfd_get_16 (input_bfd
, where
);
3276 if (howto
->pc_relative
)
3278 addend
= (addend
^ 0x8000) - 0x8000;
3283 addend
= bfd_get_32 (input_bfd
, where
);
3284 if (howto
->pc_relative
)
3286 addend
= (addend
^ 0x80000000) - 0x80000000;
3294 if (info
->relocatable
)
3295 addend
+= sec
->output_offset
;
3298 asection
*msec
= sec
;
3299 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
,
3301 addend
-= relocation
;
3302 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
3305 switch (howto
->size
)
3308 /* FIXME: overflow checks. */
3309 if (howto
->pc_relative
)
3311 bfd_put_8 (input_bfd
, addend
, where
);
3314 if (howto
->pc_relative
)
3316 bfd_put_16 (input_bfd
, addend
, where
);
3319 if (howto
->pc_relative
)
3321 bfd_put_32 (input_bfd
, addend
, where
);
3325 else if (!info
->relocatable
3326 && ELF32_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
3328 /* Relocate against local STT_GNU_IFUNC symbol. */
3329 h
= elf_i386_get_local_sym_hash (htab
, input_bfd
, rel
,
3334 /* Set STT_GNU_IFUNC symbol value. */
3335 h
->root
.u
.def
.value
= sym
->st_value
;
3336 h
->root
.u
.def
.section
= sec
;
3341 bfd_boolean warned ATTRIBUTE_UNUSED
;
3343 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
3344 r_symndx
, symtab_hdr
, sym_hashes
,
3346 unresolved_reloc
, warned
);
3350 if (sec
!= NULL
&& discarded_section (sec
))
3351 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
3352 rel
, 1, relend
, howto
, 0, contents
);
3354 if (info
->relocatable
)
3357 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3358 it here if it is defined in a non-shared object. */
3360 && h
->type
== STT_GNU_IFUNC
3363 asection
*plt
, *gotplt
, *base_got
;
3367 if ((input_section
->flags
& SEC_ALLOC
) == 0
3368 || h
->plt
.offset
== (bfd_vma
) -1)
3371 /* STT_GNU_IFUNC symbol must go through PLT. */
3372 if (htab
->elf
.splt
!= NULL
)
3374 plt
= htab
->elf
.splt
;
3375 gotplt
= htab
->elf
.sgotplt
;
3379 plt
= htab
->elf
.iplt
;
3380 gotplt
= htab
->elf
.igotplt
;
3383 relocation
= (plt
->output_section
->vma
3384 + plt
->output_offset
+ h
->plt
.offset
);
3389 if (h
->root
.root
.string
)
3390 name
= h
->root
.root
.string
;
3392 name
= bfd_elf_sym_name (input_bfd
, symtab_hdr
, sym
,
3394 (*_bfd_error_handler
)
3395 (_("%B: relocation %s against STT_GNU_IFUNC "
3396 "symbol `%s' isn't handled by %s"), input_bfd
,
3397 elf_howto_table
[r_type
].name
,
3398 name
, __FUNCTION__
);
3399 bfd_set_error (bfd_error_bad_value
);
3403 /* Generate dynamic relcoation only when there is a
3404 non-GOT reference in a shared object. */
3405 if (info
->shared
&& h
->non_got_ref
)
3407 Elf_Internal_Rela outrel
;
3411 /* Need a dynamic relocation to get the real function
3413 offset
= _bfd_elf_section_offset (output_bfd
,
3417 if (offset
== (bfd_vma
) -1
3418 || offset
== (bfd_vma
) -2)
3421 outrel
.r_offset
= (input_section
->output_section
->vma
3422 + input_section
->output_offset
3425 if (h
->dynindx
== -1
3427 || info
->executable
)
3429 /* This symbol is resolved locally. */
3430 outrel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
3431 bfd_put_32 (output_bfd
,
3432 (h
->root
.u
.def
.value
3433 + h
->root
.u
.def
.section
->output_section
->vma
3434 + h
->root
.u
.def
.section
->output_offset
),
3438 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3440 sreloc
= htab
->elf
.irelifunc
;
3441 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3443 /* If this reloc is against an external symbol, we
3444 do not want to fiddle with the addend. Otherwise,
3445 we need to include the symbol value so that it
3446 becomes an addend for the dynamic reloc. For an
3447 internal symbol, we have updated addend. */
3456 base_got
= htab
->elf
.sgot
;
3457 off
= h
->got
.offset
;
3459 if (base_got
== NULL
)
3462 if (off
== (bfd_vma
) -1)
3464 /* We can't use h->got.offset here to save state, or
3465 even just remember the offset, as finish_dynamic_symbol
3466 would use that as offset into .got. */
3468 if (htab
->elf
.splt
!= NULL
)
3470 plt_index
= h
->plt
.offset
/ plt_entry_size
- 1;
3471 off
= (plt_index
+ 3) * 4;
3472 base_got
= htab
->elf
.sgotplt
;
3476 plt_index
= h
->plt
.offset
/ plt_entry_size
;
3477 off
= plt_index
* 4;
3478 base_got
= htab
->elf
.igotplt
;
3481 if (h
->dynindx
== -1
3485 /* This references the local defitionion. We must
3486 initialize this entry in the global offset table.
3487 Since the offset must always be a multiple of 8,
3488 we use the least significant bit to record
3489 whether we have initialized it already.
3491 When doing a dynamic link, we create a .rela.got
3492 relocation entry to initialize the value. This
3493 is done in the finish_dynamic_symbol routine. */
3498 bfd_put_32 (output_bfd
, relocation
,
3499 base_got
->contents
+ off
);
3506 /* Adjust for static executables. */
3507 if (htab
->elf
.splt
== NULL
)
3508 relocation
+= gotplt
->output_offset
;
3512 relocation
= (base_got
->output_section
->vma
3513 + base_got
->output_offset
+ off
3514 - gotplt
->output_section
->vma
3515 - gotplt
->output_offset
);
3516 /* Adjust for static executables. */
3517 if (htab
->elf
.splt
== NULL
)
3518 relocation
+= gotplt
->output_offset
;
3524 relocation
-= (gotplt
->output_section
->vma
3525 + gotplt
->output_offset
);
3533 /* Relocation is to the entry for this symbol in the global
3535 if (htab
->elf
.sgot
== NULL
)
3542 off
= h
->got
.offset
;
3543 dyn
= htab
->elf
.dynamic_sections_created
;
3544 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
3546 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3547 || (ELF_ST_VISIBILITY (h
->other
)
3548 && h
->root
.type
== bfd_link_hash_undefweak
))
3550 /* This is actually a static link, or it is a
3551 -Bsymbolic link and the symbol is defined
3552 locally, or the symbol was forced to be local
3553 because of a version file. We must initialize
3554 this entry in the global offset table. Since the
3555 offset must always be a multiple of 4, we use the
3556 least significant bit to record whether we have
3557 initialized it already.
3559 When doing a dynamic link, we create a .rel.got
3560 relocation entry to initialize the value. This
3561 is done in the finish_dynamic_symbol routine. */
3566 bfd_put_32 (output_bfd
, relocation
,
3567 htab
->elf
.sgot
->contents
+ off
);
3572 unresolved_reloc
= FALSE
;
3576 if (local_got_offsets
== NULL
)
3579 off
= local_got_offsets
[r_symndx
];
3581 /* The offset must always be a multiple of 4. We use
3582 the least significant bit to record whether we have
3583 already generated the necessary reloc. */
3588 bfd_put_32 (output_bfd
, relocation
,
3589 htab
->elf
.sgot
->contents
+ off
);
3594 Elf_Internal_Rela outrel
;
3596 s
= htab
->elf
.srelgot
;
3600 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3601 + htab
->elf
.sgot
->output_offset
3603 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3604 elf_append_rel (output_bfd
, s
, &outrel
);
3607 local_got_offsets
[r_symndx
] |= 1;
3611 if (off
>= (bfd_vma
) -2)
3614 relocation
= htab
->elf
.sgot
->output_section
->vma
3615 + htab
->elf
.sgot
->output_offset
+ off
3616 - htab
->elf
.sgotplt
->output_section
->vma
3617 - htab
->elf
.sgotplt
->output_offset
;
3621 /* Relocation is relative to the start of the global offset
3624 /* Check to make sure it isn't a protected function symbol
3625 for shared library since it may not be local when used
3626 as function address. We also need to make sure that a
3627 symbol is defined locally. */
3628 if (info
->shared
&& h
)
3630 if (!h
->def_regular
)
3634 switch (ELF_ST_VISIBILITY (h
->other
))
3637 v
= _("hidden symbol");
3640 v
= _("internal symbol");
3643 v
= _("protected symbol");
3650 (*_bfd_error_handler
)
3651 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3652 input_bfd
, v
, h
->root
.root
.string
);
3653 bfd_set_error (bfd_error_bad_value
);
3656 else if (!info
->executable
3657 && !SYMBOLIC_BIND (info
, h
)
3658 && h
->type
== STT_FUNC
3659 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
3661 (*_bfd_error_handler
)
3662 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3663 input_bfd
, h
->root
.root
.string
);
3664 bfd_set_error (bfd_error_bad_value
);
3669 /* Note that sgot is not involved in this
3670 calculation. We always want the start of .got.plt. If we
3671 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3672 permitted by the ABI, we might have to change this
3674 relocation
-= htab
->elf
.sgotplt
->output_section
->vma
3675 + htab
->elf
.sgotplt
->output_offset
;
3679 /* Use global offset table as symbol value. */
3680 relocation
= htab
->elf
.sgotplt
->output_section
->vma
3681 + htab
->elf
.sgotplt
->output_offset
;
3682 unresolved_reloc
= FALSE
;
3686 /* Relocation is to the entry for this symbol in the
3687 procedure linkage table. */
3689 /* Resolve a PLT32 reloc against a local symbol directly,
3690 without using the procedure linkage table. */
3694 if (h
->plt
.offset
== (bfd_vma
) -1
3695 || htab
->elf
.splt
== NULL
)
3697 /* We didn't make a PLT entry for this symbol. This
3698 happens when statically linking PIC code, or when
3699 using -Bsymbolic. */
3703 relocation
= (htab
->elf
.splt
->output_section
->vma
3704 + htab
->elf
.splt
->output_offset
3706 unresolved_reloc
= FALSE
;
3710 /* Set to symbol size. */
3711 relocation
= st_size
;
3712 if (h
&& h
->type
== STT_TLS
&& st_size
!= 0)
3714 /* Resolve size relocation against non-zero TLS symbol. */
3715 unresolved_reloc
= FALSE
;
3722 if ((input_section
->flags
& SEC_ALLOC
) == 0
3728 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
3729 || h
->root
.type
!= bfd_link_hash_undefweak
)
3730 && ((r_type
!= R_386_PC32
&& r_type
!= R_386_SIZE32
)
3731 || !SYMBOL_CALLS_LOCAL (info
, h
)))
3732 || (ELIMINATE_COPY_RELOCS
3739 || h
->root
.type
== bfd_link_hash_undefweak
3740 || h
->root
.type
== bfd_link_hash_undefined
)))
3742 Elf_Internal_Rela outrel
;
3743 bfd_boolean skip
, relocate
;
3746 /* When generating a shared object, these relocations
3747 are copied into the output file to be resolved at run
3754 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3756 if (outrel
.r_offset
== (bfd_vma
) -1)
3758 else if (outrel
.r_offset
== (bfd_vma
) -2)
3759 skip
= TRUE
, relocate
= TRUE
;
3760 outrel
.r_offset
+= (input_section
->output_section
->vma
3761 + input_section
->output_offset
);
3764 memset (&outrel
, 0, sizeof outrel
);
3767 && (r_type
== R_386_PC32
3769 || !SYMBOLIC_BIND (info
, h
)
3770 || !h
->def_regular
))
3771 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
3774 /* This symbol is local, or marked to become local. */
3776 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3779 sreloc
= elf_section_data (input_section
)->sreloc
;
3781 if (sreloc
== NULL
|| sreloc
->contents
== NULL
)
3783 r
= bfd_reloc_notsupported
;
3784 goto check_relocation_error
;
3787 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3789 /* If this reloc is against an external symbol, we do
3790 not want to fiddle with the addend. Otherwise, we
3791 need to include the symbol value so that it becomes
3792 an addend for the dynamic reloc. */
3799 if (!info
->executable
)
3801 Elf_Internal_Rela outrel
;
3804 outrel
.r_offset
= rel
->r_offset
3805 + input_section
->output_section
->vma
3806 + input_section
->output_offset
;
3807 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3808 sreloc
= elf_section_data (input_section
)->sreloc
;
3811 elf_append_rel (output_bfd
, sreloc
, &outrel
);
3816 case R_386_TLS_GOTDESC
:
3817 case R_386_TLS_DESC_CALL
:
3818 case R_386_TLS_IE_32
:
3819 case R_386_TLS_GOTIE
:
3820 tls_type
= GOT_UNKNOWN
;
3821 if (h
== NULL
&& local_got_offsets
)
3822 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
3824 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
3825 if (tls_type
== GOT_TLS_IE
)
3826 tls_type
= GOT_TLS_IE_NEG
;
3828 if (! elf_i386_tls_transition (info
, input_bfd
,
3829 input_section
, contents
,
3830 symtab_hdr
, sym_hashes
,
3831 &r_type
, tls_type
, rel
,
3832 relend
, h
, r_symndx
))
3835 if (r_type
== R_386_TLS_LE_32
)
3837 BFD_ASSERT (! unresolved_reloc
);
3838 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3843 /* GD->LE transition. */
3844 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3847 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3849 movl %gs:0, %eax; subl $foo@tpoff, %eax
3850 (6 byte form of subl). */
3851 memcpy (contents
+ rel
->r_offset
- 3,
3852 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3853 roff
= rel
->r_offset
+ 5;
3857 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3859 movl %gs:0, %eax; subl $foo@tpoff, %eax
3860 (6 byte form of subl). */
3861 memcpy (contents
+ rel
->r_offset
- 2,
3862 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3863 roff
= rel
->r_offset
+ 6;
3865 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
3867 /* Skip R_386_PC32/R_386_PLT32. */
3871 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3873 /* GDesc -> LE transition.
3874 It's originally something like:
3875 leal x@tlsdesc(%ebx), %eax
3879 Registers other than %eax may be set up here. */
3884 roff
= rel
->r_offset
;
3885 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3887 /* Now modify the instruction as appropriate. */
3888 /* aoliva FIXME: remove the above and xor the byte
3890 bfd_put_8 (output_bfd
, val
^ 0x86,
3891 contents
+ roff
- 1);
3892 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3896 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3898 /* GDesc -> LE transition.
3906 roff
= rel
->r_offset
;
3907 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
3908 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3911 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
3915 /* IE->LE transition:
3916 Originally it can be one of:
3924 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3927 /* movl foo, %eax. */
3928 bfd_put_8 (output_bfd
, 0xb8,
3929 contents
+ rel
->r_offset
- 1);
3935 type
= bfd_get_8 (input_bfd
,
3936 contents
+ rel
->r_offset
- 2);
3941 bfd_put_8 (output_bfd
, 0xc7,
3942 contents
+ rel
->r_offset
- 2);
3943 bfd_put_8 (output_bfd
,
3944 0xc0 | ((val
>> 3) & 7),
3945 contents
+ rel
->r_offset
- 1);
3949 bfd_put_8 (output_bfd
, 0x81,
3950 contents
+ rel
->r_offset
- 2);
3951 bfd_put_8 (output_bfd
,
3952 0xc0 | ((val
>> 3) & 7),
3953 contents
+ rel
->r_offset
- 1);
3960 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
3961 contents
+ rel
->r_offset
);
3966 unsigned int val
, type
;
3968 /* {IE_32,GOTIE}->LE transition:
3969 Originally it can be one of:
3970 subl foo(%reg1), %reg2
3971 movl foo(%reg1), %reg2
3972 addl foo(%reg1), %reg2
3975 movl $foo, %reg2 (6 byte form)
3976 addl $foo, %reg2. */
3977 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3978 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3982 bfd_put_8 (output_bfd
, 0xc7,
3983 contents
+ rel
->r_offset
- 2);
3984 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
3985 contents
+ rel
->r_offset
- 1);
3987 else if (type
== 0x2b)
3990 bfd_put_8 (output_bfd
, 0x81,
3991 contents
+ rel
->r_offset
- 2);
3992 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
3993 contents
+ rel
->r_offset
- 1);
3995 else if (type
== 0x03)
3998 bfd_put_8 (output_bfd
, 0x81,
3999 contents
+ rel
->r_offset
- 2);
4000 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
4001 contents
+ rel
->r_offset
- 1);
4005 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
4006 bfd_put_32 (output_bfd
, -elf_i386_tpoff (info
, relocation
),
4007 contents
+ rel
->r_offset
);
4009 bfd_put_32 (output_bfd
, elf_i386_tpoff (info
, relocation
),
4010 contents
+ rel
->r_offset
);
4015 if (htab
->elf
.sgot
== NULL
)
4020 off
= h
->got
.offset
;
4021 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
4025 if (local_got_offsets
== NULL
)
4028 off
= local_got_offsets
[r_symndx
];
4029 offplt
= local_tlsdesc_gotents
[r_symndx
];
4036 Elf_Internal_Rela outrel
;
4040 if (htab
->elf
.srelgot
== NULL
)
4043 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
4045 if (GOT_TLS_GDESC_P (tls_type
))
4048 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
4049 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
4050 <= htab
->elf
.sgotplt
->size
);
4051 outrel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4052 + htab
->elf
.sgotplt
->output_offset
4054 + htab
->sgotplt_jump_table_size
);
4055 sreloc
= htab
->elf
.srelplt
;
4056 loc
= sreloc
->contents
;
4057 loc
+= (htab
->next_tls_desc_index
++
4058 * sizeof (Elf32_External_Rel
));
4059 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
4060 <= sreloc
->contents
+ sreloc
->size
);
4061 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
4064 BFD_ASSERT (! unresolved_reloc
);
4065 bfd_put_32 (output_bfd
,
4066 relocation
- elf_i386_dtpoff_base (info
),
4067 htab
->elf
.sgotplt
->contents
+ offplt
4068 + htab
->sgotplt_jump_table_size
+ 4);
4072 bfd_put_32 (output_bfd
, 0,
4073 htab
->elf
.sgotplt
->contents
+ offplt
4074 + htab
->sgotplt_jump_table_size
+ 4);
4078 sreloc
= htab
->elf
.srelgot
;
4080 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4081 + htab
->elf
.sgot
->output_offset
+ off
);
4083 if (GOT_TLS_GD_P (tls_type
))
4084 dr_type
= R_386_TLS_DTPMOD32
;
4085 else if (GOT_TLS_GDESC_P (tls_type
))
4087 else if (tls_type
== GOT_TLS_IE_POS
)
4088 dr_type
= R_386_TLS_TPOFF
;
4090 dr_type
= R_386_TLS_TPOFF32
;
4092 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
4093 bfd_put_32 (output_bfd
,
4094 relocation
- elf_i386_dtpoff_base (info
),
4095 htab
->elf
.sgot
->contents
+ off
);
4096 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
4097 bfd_put_32 (output_bfd
,
4098 elf_i386_dtpoff_base (info
) - relocation
,
4099 htab
->elf
.sgot
->contents
+ off
);
4100 else if (dr_type
!= R_386_TLS_DESC
)
4101 bfd_put_32 (output_bfd
, 0,
4102 htab
->elf
.sgot
->contents
+ off
);
4103 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
4105 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4107 if (GOT_TLS_GD_P (tls_type
))
4111 BFD_ASSERT (! unresolved_reloc
);
4112 bfd_put_32 (output_bfd
,
4113 relocation
- elf_i386_dtpoff_base (info
),
4114 htab
->elf
.sgot
->contents
+ off
+ 4);
4118 bfd_put_32 (output_bfd
, 0,
4119 htab
->elf
.sgot
->contents
+ off
+ 4);
4120 outrel
.r_info
= ELF32_R_INFO (indx
,
4121 R_386_TLS_DTPOFF32
);
4122 outrel
.r_offset
+= 4;
4123 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4126 else if (tls_type
== GOT_TLS_IE_BOTH
)
4128 bfd_put_32 (output_bfd
,
4130 ? relocation
- elf_i386_dtpoff_base (info
)
4132 htab
->elf
.sgot
->contents
+ off
+ 4);
4133 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4134 outrel
.r_offset
+= 4;
4135 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4142 local_got_offsets
[r_symndx
] |= 1;
4145 if (off
>= (bfd_vma
) -2
4146 && ! GOT_TLS_GDESC_P (tls_type
))
4148 if (r_type
== R_386_TLS_GOTDESC
4149 || r_type
== R_386_TLS_DESC_CALL
)
4151 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
4152 unresolved_reloc
= FALSE
;
4154 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
4156 bfd_vma g_o_t
= htab
->elf
.sgotplt
->output_section
->vma
4157 + htab
->elf
.sgotplt
->output_offset
;
4158 relocation
= htab
->elf
.sgot
->output_section
->vma
4159 + htab
->elf
.sgot
->output_offset
+ off
- g_o_t
;
4160 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
4161 && tls_type
== GOT_TLS_IE_BOTH
)
4163 if (r_type
== R_386_TLS_IE
)
4164 relocation
+= g_o_t
;
4165 unresolved_reloc
= FALSE
;
4167 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
4169 unsigned int val
, type
;
4172 /* GD->IE transition. */
4173 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
4174 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
4177 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4179 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4181 roff
= rel
->r_offset
- 3;
4185 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4187 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4188 roff
= rel
->r_offset
- 2;
4190 memcpy (contents
+ roff
,
4191 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4192 contents
[roff
+ 7] = 0x80 | (val
& 7);
4193 /* If foo is used only with foo@gotntpoff(%reg) and
4194 foo@indntpoff, but not with foo@gottpoff(%reg), change
4195 subl $foo@gottpoff(%reg), %eax
4197 addl $foo@gotntpoff(%reg), %eax. */
4198 if (tls_type
== GOT_TLS_IE_POS
)
4199 contents
[roff
+ 6] = 0x03;
4200 bfd_put_32 (output_bfd
,
4201 htab
->elf
.sgot
->output_section
->vma
4202 + htab
->elf
.sgot
->output_offset
+ off
4203 - htab
->elf
.sgotplt
->output_section
->vma
4204 - htab
->elf
.sgotplt
->output_offset
,
4205 contents
+ roff
+ 8);
4206 /* Skip R_386_PLT32. */
4210 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
4212 /* GDesc -> IE transition.
4213 It's originally something like:
4214 leal x@tlsdesc(%ebx), %eax
4217 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4219 movl x@gottpoff(%ebx), %eax # before negl %eax
4221 Registers other than %eax may be set up here. */
4225 /* First, make sure it's a leal adding ebx to a 32-bit
4226 offset into any register, although it's probably
4227 almost always going to be eax. */
4228 roff
= rel
->r_offset
;
4230 /* Now modify the instruction as appropriate. */
4231 /* To turn a leal into a movl in the form we use it, it
4232 suffices to change the first byte from 0x8d to 0x8b.
4233 aoliva FIXME: should we decide to keep the leal, all
4234 we have to do is remove the statement below, and
4235 adjust the relaxation of R_386_TLS_DESC_CALL. */
4236 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
4238 if (tls_type
== GOT_TLS_IE_BOTH
)
4241 bfd_put_32 (output_bfd
,
4242 htab
->elf
.sgot
->output_section
->vma
4243 + htab
->elf
.sgot
->output_offset
+ off
4244 - htab
->elf
.sgotplt
->output_section
->vma
4245 - htab
->elf
.sgotplt
->output_offset
,
4249 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
4251 /* GDesc -> IE transition.
4259 depending on how we transformed the TLS_GOTDESC above.
4264 roff
= rel
->r_offset
;
4266 /* Now modify the instruction as appropriate. */
4267 if (tls_type
!= GOT_TLS_IE_NEG
)
4270 bfd_put_8 (output_bfd
, 0x66, contents
+ roff
);
4271 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
4276 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
4277 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
4287 if (! elf_i386_tls_transition (info
, input_bfd
,
4288 input_section
, contents
,
4289 symtab_hdr
, sym_hashes
,
4290 &r_type
, GOT_UNKNOWN
, rel
,
4291 relend
, h
, r_symndx
))
4294 if (r_type
!= R_386_TLS_LDM
)
4296 /* LD->LE transition:
4297 leal foo(%reg), %eax; call ___tls_get_addr.
4299 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4300 BFD_ASSERT (r_type
== R_386_TLS_LE_32
);
4301 memcpy (contents
+ rel
->r_offset
- 2,
4302 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4303 /* Skip R_386_PC32/R_386_PLT32. */
4308 if (htab
->elf
.sgot
== NULL
)
4311 off
= htab
->tls_ldm_got
.offset
;
4316 Elf_Internal_Rela outrel
;
4318 if (htab
->elf
.srelgot
== NULL
)
4321 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4322 + htab
->elf
.sgot
->output_offset
+ off
);
4324 bfd_put_32 (output_bfd
, 0,
4325 htab
->elf
.sgot
->contents
+ off
);
4326 bfd_put_32 (output_bfd
, 0,
4327 htab
->elf
.sgot
->contents
+ off
+ 4);
4328 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
4329 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &outrel
);
4330 htab
->tls_ldm_got
.offset
|= 1;
4332 relocation
= htab
->elf
.sgot
->output_section
->vma
4333 + htab
->elf
.sgot
->output_offset
+ off
4334 - htab
->elf
.sgotplt
->output_section
->vma
4335 - htab
->elf
.sgotplt
->output_offset
;
4336 unresolved_reloc
= FALSE
;
4339 case R_386_TLS_LDO_32
:
4340 if (!info
->executable
|| (input_section
->flags
& SEC_CODE
) == 0)
4341 relocation
-= elf_i386_dtpoff_base (info
);
4343 /* When converting LDO to LE, we must negate. */
4344 relocation
= -elf_i386_tpoff (info
, relocation
);
4347 case R_386_TLS_LE_32
:
4349 if (!info
->executable
)
4351 Elf_Internal_Rela outrel
;
4354 outrel
.r_offset
= rel
->r_offset
4355 + input_section
->output_section
->vma
4356 + input_section
->output_offset
;
4357 if (h
!= NULL
&& h
->dynindx
!= -1)
4361 if (r_type
== R_386_TLS_LE_32
)
4362 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
4364 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
4365 sreloc
= elf_section_data (input_section
)->sreloc
;
4368 elf_append_rel (output_bfd
, sreloc
, &outrel
);
4371 else if (r_type
== R_386_TLS_LE_32
)
4372 relocation
= elf_i386_dtpoff_base (info
) - relocation
;
4374 relocation
-= elf_i386_dtpoff_base (info
);
4376 else if (r_type
== R_386_TLS_LE_32
)
4377 relocation
= elf_i386_tpoff (info
, relocation
);
4379 relocation
= -elf_i386_tpoff (info
, relocation
);
4386 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4387 because such sections are not SEC_ALLOC and thus ld.so will
4388 not process them. */
4389 if (unresolved_reloc
4390 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
4392 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
4393 rel
->r_offset
) != (bfd_vma
) -1)
4395 (*_bfd_error_handler
)
4396 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4399 (long) rel
->r_offset
,
4401 h
->root
.root
.string
);
4406 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
4407 contents
, rel
->r_offset
,
4410 check_relocation_error
:
4411 if (r
!= bfd_reloc_ok
)
4416 name
= h
->root
.root
.string
;
4419 name
= bfd_elf_string_from_elf_section (input_bfd
,
4420 symtab_hdr
->sh_link
,
4425 name
= bfd_section_name (input_bfd
, sec
);
4428 if (r
== bfd_reloc_overflow
)
4430 if (! ((*info
->callbacks
->reloc_overflow
)
4431 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
4432 (bfd_vma
) 0, input_bfd
, input_section
,
4438 (*_bfd_error_handler
)
4439 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4440 input_bfd
, input_section
,
4441 (long) rel
->r_offset
, name
, (int) r
);
4450 /* Finish up dynamic symbol handling. We set the contents of various
4451 dynamic sections here. */
4454 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
4455 struct bfd_link_info
*info
,
4456 struct elf_link_hash_entry
*h
,
4457 Elf_Internal_Sym
*sym
)
4459 struct elf_i386_link_hash_table
*htab
;
4460 unsigned plt_entry_size
;
4461 const struct elf_i386_backend_data
*abed
;
4463 htab
= elf_i386_hash_table (info
);
4467 abed
= get_elf_i386_backend_data (output_bfd
);
4468 plt_entry_size
= GET_PLT_ENTRY_SIZE (output_bfd
);
4470 if (h
->plt
.offset
!= (bfd_vma
) -1)
4474 Elf_Internal_Rela rel
;
4476 asection
*plt
, *gotplt
, *relplt
;
4478 /* When building a static executable, use .iplt, .igot.plt and
4479 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4480 if (htab
->elf
.splt
!= NULL
)
4482 plt
= htab
->elf
.splt
;
4483 gotplt
= htab
->elf
.sgotplt
;
4484 relplt
= htab
->elf
.srelplt
;
4488 plt
= htab
->elf
.iplt
;
4489 gotplt
= htab
->elf
.igotplt
;
4490 relplt
= htab
->elf
.irelplt
;
4493 /* This symbol has an entry in the procedure linkage table. Set
4496 if ((h
->dynindx
== -1
4497 && !((h
->forced_local
|| info
->executable
)
4499 && h
->type
== STT_GNU_IFUNC
))
4505 /* Get the index in the procedure linkage table which
4506 corresponds to this symbol. This is the index of this symbol
4507 in all the symbols for which we are making plt entries. The
4508 first entry in the procedure linkage table is reserved.
4510 Get the offset into the .got table of the entry that
4511 corresponds to this function. Each .got entry is 4 bytes.
4512 The first three are reserved.
4514 For static executables, we don't reserve anything. */
4516 if (plt
== htab
->elf
.splt
)
4518 got_offset
= h
->plt
.offset
/ plt_entry_size
- 1;
4519 got_offset
= (got_offset
+ 3) * 4;
4523 got_offset
= h
->plt
.offset
/ plt_entry_size
;
4524 got_offset
= got_offset
* 4;
4527 /* Fill in the entry in the procedure linkage table. */
4530 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->plt_entry
,
4531 abed
->plt
->plt_entry_size
);
4532 bfd_put_32 (output_bfd
,
4533 (gotplt
->output_section
->vma
4534 + gotplt
->output_offset
4536 plt
->contents
+ h
->plt
.offset
4537 + abed
->plt
->plt_got_offset
);
4539 if (abed
->is_vxworks
)
4541 int s
, k
, reloc_index
;
4543 /* Create the R_386_32 relocation referencing the GOT
4544 for this PLT entry. */
4546 /* S: Current slot number (zero-based). */
4547 s
= ((h
->plt
.offset
- abed
->plt
->plt_entry_size
)
4548 / abed
->plt
->plt_entry_size
);
4549 /* K: Number of relocations for PLTResolve. */
4551 k
= PLTRESOLVE_RELOCS_SHLIB
;
4553 k
= PLTRESOLVE_RELOCS
;
4554 /* Skip the PLTresolve relocations, and the relocations for
4555 the other PLT slots. */
4556 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
4557 loc
= (htab
->srelplt2
->contents
+ reloc_index
4558 * sizeof (Elf32_External_Rel
));
4560 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4561 + htab
->elf
.splt
->output_offset
4562 + h
->plt
.offset
+ 2),
4563 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4564 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4566 /* Create the R_386_32 relocation referencing the beginning of
4567 the PLT for this GOT entry. */
4568 rel
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
4569 + htab
->elf
.sgotplt
->output_offset
4571 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4572 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4573 loc
+ sizeof (Elf32_External_Rel
));
4578 memcpy (plt
->contents
+ h
->plt
.offset
, abed
->plt
->pic_plt_entry
,
4579 abed
->plt
->plt_entry_size
);
4580 bfd_put_32 (output_bfd
, got_offset
,
4581 plt
->contents
+ h
->plt
.offset
4582 + abed
->plt
->plt_got_offset
);
4585 /* Fill in the entry in the global offset table. */
4586 bfd_put_32 (output_bfd
,
4587 (plt
->output_section
->vma
4588 + plt
->output_offset
4590 + abed
->plt
->plt_lazy_offset
),
4591 gotplt
->contents
+ got_offset
);
4593 /* Fill in the entry in the .rel.plt section. */
4594 rel
.r_offset
= (gotplt
->output_section
->vma
4595 + gotplt
->output_offset
4597 if (h
->dynindx
== -1
4598 || ((info
->executable
4599 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
4601 && h
->type
== STT_GNU_IFUNC
))
4603 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4604 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4605 in the .got.plt section. */
4606 bfd_put_32 (output_bfd
,
4607 (h
->root
.u
.def
.value
4608 + h
->root
.u
.def
.section
->output_section
->vma
4609 + h
->root
.u
.def
.section
->output_offset
),
4610 gotplt
->contents
+ got_offset
);
4611 rel
.r_info
= ELF32_R_INFO (0, R_386_IRELATIVE
);
4612 /* R_386_IRELATIVE comes last. */
4613 plt_index
= htab
->next_irelative_index
--;
4617 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
4618 plt_index
= htab
->next_jump_slot_index
++;
4620 loc
= relplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
4621 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
4623 /* Don't fill PLT entry for static executables. */
4624 if (plt
== htab
->elf
.splt
)
4626 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
4627 plt
->contents
+ h
->plt
.offset
4628 + abed
->plt
->plt_reloc_offset
);
4629 bfd_put_32 (output_bfd
, - (h
->plt
.offset
4630 + abed
->plt
->plt_plt_offset
+ 4),
4631 plt
->contents
+ h
->plt
.offset
4632 + abed
->plt
->plt_plt_offset
);
4635 if (!h
->def_regular
)
4637 /* Mark the symbol as undefined, rather than as defined in
4638 the .plt section. Leave the value if there were any
4639 relocations where pointer equality matters (this is a clue
4640 for the dynamic linker, to make function pointer
4641 comparisons work between an application and shared
4642 library), otherwise set it to zero. If a function is only
4643 called from a binary, there is no need to slow down
4644 shared libraries because of that. */
4645 sym
->st_shndx
= SHN_UNDEF
;
4646 if (!h
->pointer_equality_needed
)
4651 if (h
->got
.offset
!= (bfd_vma
) -1
4652 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
4653 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
4655 Elf_Internal_Rela rel
;
4657 /* This symbol has an entry in the global offset table. Set it
4660 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
4663 rel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
4664 + htab
->elf
.sgot
->output_offset
4665 + (h
->got
.offset
& ~(bfd_vma
) 1));
4667 /* If this is a static link, or it is a -Bsymbolic link and the
4668 symbol is defined locally or was forced to be local because
4669 of a version file, we just want to emit a RELATIVE reloc.
4670 The entry in the global offset table will already have been
4671 initialized in the relocate_section function. */
4673 && h
->type
== STT_GNU_IFUNC
)
4677 /* Generate R_386_GLOB_DAT. */
4684 if (!h
->pointer_equality_needed
)
4687 /* For non-shared object, we can't use .got.plt, which
4688 contains the real function addres if we need pointer
4689 equality. We load the GOT entry with the PLT entry. */
4690 plt
= htab
->elf
.splt
? htab
->elf
.splt
: htab
->elf
.iplt
;
4691 bfd_put_32 (output_bfd
,
4692 (plt
->output_section
->vma
4693 + plt
->output_offset
+ h
->plt
.offset
),
4694 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4698 else if (info
->shared
4699 && SYMBOL_REFERENCES_LOCAL (info
, h
))
4701 BFD_ASSERT((h
->got
.offset
& 1) != 0);
4702 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
4706 BFD_ASSERT((h
->got
.offset
& 1) == 0);
4708 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
4709 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
4710 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
4713 elf_append_rel (output_bfd
, htab
->elf
.srelgot
, &rel
);
4718 Elf_Internal_Rela rel
;
4720 /* This symbol needs a copy reloc. Set it up. */
4722 if (h
->dynindx
== -1
4723 || (h
->root
.type
!= bfd_link_hash_defined
4724 && h
->root
.type
!= bfd_link_hash_defweak
)
4725 || htab
->srelbss
== NULL
)
4728 rel
.r_offset
= (h
->root
.u
.def
.value
4729 + h
->root
.u
.def
.section
->output_section
->vma
4730 + h
->root
.u
.def
.section
->output_offset
);
4731 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
4732 elf_append_rel (output_bfd
, htab
->srelbss
, &rel
);
4738 /* Finish up local dynamic symbol handling. We set the contents of
4739 various dynamic sections here. */
4742 elf_i386_finish_local_dynamic_symbol (void **slot
, void *inf
)
4744 struct elf_link_hash_entry
*h
4745 = (struct elf_link_hash_entry
*) *slot
;
4746 struct bfd_link_info
*info
4747 = (struct bfd_link_info
*) inf
;
4749 return elf_i386_finish_dynamic_symbol (info
->output_bfd
, info
,
4753 /* Used to decide how to sort relocs in an optimal manner for the
4754 dynamic linker, before writing them out. */
4756 static enum elf_reloc_type_class
4757 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
4759 switch (ELF32_R_TYPE (rela
->r_info
))
4761 case R_386_RELATIVE
:
4762 return reloc_class_relative
;
4763 case R_386_JUMP_SLOT
:
4764 return reloc_class_plt
;
4766 return reloc_class_copy
;
4768 return reloc_class_normal
;
4772 /* Finish up the dynamic sections. */
4775 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
4776 struct bfd_link_info
*info
)
4778 struct elf_i386_link_hash_table
*htab
;
4781 const struct elf_i386_backend_data
*abed
;
4783 htab
= elf_i386_hash_table (info
);
4787 dynobj
= htab
->elf
.dynobj
;
4788 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
4789 abed
= get_elf_i386_backend_data (output_bfd
);
4791 if (htab
->elf
.dynamic_sections_created
)
4793 Elf32_External_Dyn
*dyncon
, *dynconend
;
4795 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
4798 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
4799 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
4800 for (; dyncon
< dynconend
; dyncon
++)
4802 Elf_Internal_Dyn dyn
;
4805 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
4810 if (abed
->is_vxworks
4811 && elf_vxworks_finish_dynamic_entry (output_bfd
, &dyn
))
4816 s
= htab
->elf
.sgotplt
;
4817 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4821 s
= htab
->elf
.srelplt
;
4822 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
4826 s
= htab
->elf
.srelplt
;
4827 dyn
.d_un
.d_val
= s
->size
;
4831 /* My reading of the SVR4 ABI indicates that the
4832 procedure linkage table relocs (DT_JMPREL) should be
4833 included in the overall relocs (DT_REL). This is
4834 what Solaris does. However, UnixWare can not handle
4835 that case. Therefore, we override the DT_RELSZ entry
4836 here to make it not include the JMPREL relocs. */
4837 s
= htab
->elf
.srelplt
;
4840 dyn
.d_un
.d_val
-= s
->size
;
4844 /* We may not be using the standard ELF linker script.
4845 If .rel.plt is the first .rel section, we adjust
4846 DT_REL to not include it. */
4847 s
= htab
->elf
.srelplt
;
4850 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
4852 dyn
.d_un
.d_ptr
+= s
->size
;
4856 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
4859 /* Fill in the first entry in the procedure linkage table. */
4860 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
4864 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->pic_plt0_entry
,
4865 abed
->plt
->plt0_entry_size
);
4866 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4867 abed
->plt0_pad_byte
,
4868 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4872 memcpy (htab
->elf
.splt
->contents
, abed
->plt
->plt0_entry
,
4873 abed
->plt
->plt0_entry_size
);
4874 memset (htab
->elf
.splt
->contents
+ abed
->plt
->plt0_entry_size
,
4875 abed
->plt0_pad_byte
,
4876 abed
->plt
->plt_entry_size
- abed
->plt
->plt0_entry_size
);
4877 bfd_put_32 (output_bfd
,
4878 (htab
->elf
.sgotplt
->output_section
->vma
4879 + htab
->elf
.sgotplt
->output_offset
4881 htab
->elf
.splt
->contents
4882 + abed
->plt
->plt0_got1_offset
);
4883 bfd_put_32 (output_bfd
,
4884 (htab
->elf
.sgotplt
->output_section
->vma
4885 + htab
->elf
.sgotplt
->output_offset
4887 htab
->elf
.splt
->contents
4888 + abed
->plt
->plt0_got2_offset
);
4890 if (abed
->is_vxworks
)
4892 Elf_Internal_Rela rel
;
4894 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4895 On IA32 we use REL relocations so the addend goes in
4896 the PLT directly. */
4897 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4898 + htab
->elf
.splt
->output_offset
4899 + abed
->plt
->plt0_got1_offset
);
4900 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4901 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4902 htab
->srelplt2
->contents
);
4903 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4904 rel
.r_offset
= (htab
->elf
.splt
->output_section
->vma
4905 + htab
->elf
.splt
->output_offset
4906 + abed
->plt
->plt0_got2_offset
);
4907 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4908 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
4909 htab
->srelplt2
->contents
+
4910 sizeof (Elf32_External_Rel
));
4914 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4915 really seem like the right value. */
4916 elf_section_data (htab
->elf
.splt
->output_section
)
4917 ->this_hdr
.sh_entsize
= 4;
4919 /* Correct the .rel.plt.unloaded relocations. */
4920 if (abed
->is_vxworks
&& !info
->shared
)
4922 int num_plts
= (htab
->elf
.splt
->size
4923 / abed
->plt
->plt_entry_size
) - 1;
4926 p
= htab
->srelplt2
->contents
;
4928 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
4930 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
4932 for (; num_plts
; num_plts
--)
4934 Elf_Internal_Rela rel
;
4935 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4936 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
4937 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4938 p
+= sizeof (Elf32_External_Rel
);
4940 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
4941 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
4942 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
4943 p
+= sizeof (Elf32_External_Rel
);
4949 if (htab
->elf
.sgotplt
)
4951 if (bfd_is_abs_section (htab
->elf
.sgotplt
->output_section
))
4953 (*_bfd_error_handler
)
4954 (_("discarded output section: `%A'"), htab
->elf
.sgotplt
);
4958 /* Fill in the first three entries in the global offset table. */
4959 if (htab
->elf
.sgotplt
->size
> 0)
4961 bfd_put_32 (output_bfd
,
4963 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
4964 htab
->elf
.sgotplt
->contents
);
4965 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 4);
4966 bfd_put_32 (output_bfd
, 0, htab
->elf
.sgotplt
->contents
+ 8);
4969 elf_section_data (htab
->elf
.sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
4972 /* Adjust .eh_frame for .plt section. */
4973 if (htab
->plt_eh_frame
!= NULL
4974 && htab
->plt_eh_frame
->contents
!= NULL
)
4976 if (htab
->elf
.splt
!= NULL
4977 && htab
->elf
.splt
->size
!= 0
4978 && (htab
->elf
.splt
->flags
& SEC_EXCLUDE
) == 0
4979 && htab
->elf
.splt
->output_section
!= NULL
4980 && htab
->plt_eh_frame
->output_section
!= NULL
)
4982 bfd_vma plt_start
= htab
->elf
.splt
->output_section
->vma
;
4983 bfd_vma eh_frame_start
= htab
->plt_eh_frame
->output_section
->vma
4984 + htab
->plt_eh_frame
->output_offset
4985 + PLT_FDE_START_OFFSET
;
4986 bfd_put_signed_32 (dynobj
, plt_start
- eh_frame_start
,
4987 htab
->plt_eh_frame
->contents
4988 + PLT_FDE_START_OFFSET
);
4990 if (htab
->plt_eh_frame
->sec_info_type
4991 == SEC_INFO_TYPE_EH_FRAME
)
4993 if (! _bfd_elf_write_section_eh_frame (output_bfd
, info
,
4995 htab
->plt_eh_frame
->contents
))
5000 if (htab
->elf
.sgot
&& htab
->elf
.sgot
->size
> 0)
5001 elf_section_data (htab
->elf
.sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
5003 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5004 htab_traverse (htab
->loc_hash_table
,
5005 elf_i386_finish_local_dynamic_symbol
,
5011 /* Return address for Ith PLT stub in section PLT, for relocation REL
5012 or (bfd_vma) -1 if it should not be included. */
5015 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
5016 const arelent
*rel ATTRIBUTE_UNUSED
)
5018 return plt
->vma
+ (i
+ 1) * GET_PLT_ENTRY_SIZE (plt
->owner
);
5021 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5024 elf_i386_hash_symbol (struct elf_link_hash_entry
*h
)
5026 if (h
->plt
.offset
!= (bfd_vma
) -1
5028 && !h
->pointer_equality_needed
)
5031 return _bfd_elf_hash_symbol (h
);
5034 /* Hook called by the linker routine which adds symbols from an object
5038 elf_i386_add_symbol_hook (bfd
* abfd
,
5039 struct bfd_link_info
* info ATTRIBUTE_UNUSED
,
5040 Elf_Internal_Sym
* sym
,
5041 const char ** namep ATTRIBUTE_UNUSED
,
5042 flagword
* flagsp ATTRIBUTE_UNUSED
,
5043 asection
** secp ATTRIBUTE_UNUSED
,
5044 bfd_vma
* valp ATTRIBUTE_UNUSED
)
5046 if ((abfd
->flags
& DYNAMIC
) == 0
5047 && (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
5048 || ELF_ST_BIND (sym
->st_info
) == STB_GNU_UNIQUE
))
5049 elf_tdata (info
->output_bfd
)->has_gnu_symbols
= TRUE
;
5054 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
5055 #define TARGET_LITTLE_NAME "elf32-i386"
5056 #define ELF_ARCH bfd_arch_i386
5057 #define ELF_TARGET_ID I386_ELF_DATA
5058 #define ELF_MACHINE_CODE EM_386
5059 #define ELF_MAXPAGESIZE 0x1000
5061 #define elf_backend_can_gc_sections 1
5062 #define elf_backend_can_refcount 1
5063 #define elf_backend_want_got_plt 1
5064 #define elf_backend_plt_readonly 1
5065 #define elf_backend_want_plt_sym 0
5066 #define elf_backend_got_header_size 12
5067 #define elf_backend_plt_alignment 4
5069 /* Support RELA for objdump of prelink objects. */
5070 #define elf_info_to_howto elf_i386_info_to_howto_rel
5071 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5073 #define bfd_elf32_mkobject elf_i386_mkobject
5075 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5076 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5077 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
5078 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5079 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5081 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5082 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5083 #define elf_backend_check_relocs elf_i386_check_relocs
5084 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5085 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5086 #define elf_backend_fake_sections elf_i386_fake_sections
5087 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5088 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5089 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5090 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5091 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5092 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5093 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5094 #define elf_backend_relocate_section elf_i386_relocate_section
5095 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5096 #define elf_backend_always_size_sections elf_i386_always_size_sections
5097 #define elf_backend_omit_section_dynsym \
5098 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5099 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
5100 #define elf_backend_hash_symbol elf_i386_hash_symbol
5101 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5102 #undef elf_backend_post_process_headers
5103 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5105 #include "elf32-target.h"
5107 /* FreeBSD support. */
5109 #undef TARGET_LITTLE_SYM
5110 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
5111 #undef TARGET_LITTLE_NAME
5112 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5114 #define ELF_OSABI ELFOSABI_FREEBSD
5116 /* The kernel recognizes executables as valid only if they carry a
5117 "FreeBSD" label in the ELF header. So we put this label on all
5118 executables and (for simplicity) also all other object files. */
5121 elf_i386_fbsd_post_process_headers (bfd
*abfd
, struct bfd_link_info
*info
)
5123 _bfd_elf_set_osabi (abfd
, info
);
5125 #ifdef OLD_FREEBSD_ABI_LABEL
5126 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
5127 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
5131 #undef elf_backend_post_process_headers
5132 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
5134 #define elf32_bed elf32_i386_fbsd_bed
5136 #undef elf_backend_add_symbol_hook
5138 #include "elf32-target.h"
5142 #undef TARGET_LITTLE_SYM
5143 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
5144 #undef TARGET_LITTLE_NAME
5145 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
5147 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
5148 objects won't be recognized. */
5152 #define elf32_bed elf32_i386_sol2_bed
5154 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
5156 #undef elf_backend_static_tls_alignment
5157 #define elf_backend_static_tls_alignment 8
5159 /* The Solaris 2 ABI requires a plt symbol on all platforms.
5161 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
5163 #undef elf_backend_want_plt_sym
5164 #define elf_backend_want_plt_sym 1
5166 #include "elf32-target.h"
5168 /* Native Client support. */
5170 #undef TARGET_LITTLE_SYM
5171 #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec
5172 #undef TARGET_LITTLE_NAME
5173 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
5175 #define elf32_bed elf32_i386_nacl_bed
5177 #undef ELF_MAXPAGESIZE
5178 #define ELF_MAXPAGESIZE 0x10000
5180 /* Restore defaults. */
5182 #undef elf_backend_want_plt_sym
5183 #define elf_backend_want_plt_sym 0
5184 #undef elf_backend_post_process_headers
5185 #define elf_backend_post_process_headers _bfd_elf_set_osabi
5186 #undef elf_backend_static_tls_alignment
5188 /* NaCl uses substantially different PLT entries for the same effects. */
5190 #undef elf_backend_plt_alignment
5191 #define elf_backend_plt_alignment 5
5192 #define NACL_PLT_ENTRY_SIZE 64
5193 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
5195 static const bfd_byte elf_i386_nacl_plt0_entry
[] =
5197 0xff, 0x35, /* pushl contents of address */
5198 0, 0, 0, 0, /* replaced with address of .got + 4. */
5199 0x8b, 0x0d, /* movl contents of address, %ecx */
5200 0, 0, 0, 0, /* replaced with address of .got + 8. */
5201 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5202 0xff, 0xe1 /* jmp *%ecx */
5205 static const bfd_byte elf_i386_nacl_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5207 0x8b, 0x0d, /* movl contents of address, %ecx */
5208 0, 0, 0, 0, /* replaced with GOT slot address. */
5209 0x83, 0xe1, NACLMASK
, /* andl $NACLMASK, %ecx */
5210 0xff, 0xe1, /* jmp *%ecx */
5212 /* Pad to the next 32-byte boundary with nop instructions. */
5214 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5215 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5217 /* Lazy GOT entries point here (32-byte aligned). */
5218 0x68, /* pushl immediate */
5219 0, 0, 0, 0, /* replaced with reloc offset. */
5220 0xe9, /* jmp relative */
5221 0, 0, 0, 0, /* replaced with offset to .plt. */
5223 /* Pad to the next 32-byte boundary with nop instructions. */
5224 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5225 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5229 static const bfd_byte
5230 elf_i386_nacl_pic_plt0_entry
[sizeof (elf_i386_nacl_plt0_entry
)] =
5232 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
5233 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
5234 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
5235 0xff, 0xe1, /* jmp *%ecx */
5237 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
5238 so pad to that size with nop instructions. */
5239 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
5242 static const bfd_byte elf_i386_nacl_pic_plt_entry
[NACL_PLT_ENTRY_SIZE
] =
5244 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
5245 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
5246 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
5247 0xff, 0xe1, /* jmp *%ecx */
5249 /* Pad to the next 32-byte boundary with nop instructions. */
5251 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5252 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5254 /* Lazy GOT entries point here (32-byte aligned). */
5255 0x68, /* pushl immediate */
5256 0, 0, 0, 0, /* replaced with offset into relocation table. */
5257 0xe9, /* jmp relative */
5258 0, 0, 0, 0, /* replaced with offset to start of .plt. */
5260 /* Pad to the next 32-byte boundary with nop instructions. */
5261 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5262 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
5266 static const bfd_byte elf_i386_nacl_eh_frame_plt
[] =
5268 #if (PLT_CIE_LENGTH != 20 \
5269 || PLT_FDE_LENGTH != 36 \
5270 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
5271 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
5272 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
5274 PLT_CIE_LENGTH
, 0, 0, 0, /* CIE length */
5275 0, 0, 0, 0, /* CIE ID */
5276 1, /* CIE version */
5277 'z', 'R', 0, /* Augmentation string */
5278 1, /* Code alignment factor */
5279 0x7c, /* Data alignment factor: -4 */
5280 8, /* Return address column */
5281 1, /* Augmentation size */
5282 DW_EH_PE_pcrel
| DW_EH_PE_sdata4
, /* FDE encoding */
5283 DW_CFA_def_cfa
, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
5284 DW_CFA_offset
+ 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
5285 DW_CFA_nop
, DW_CFA_nop
,
5287 PLT_FDE_LENGTH
, 0, 0, 0, /* FDE length */
5288 PLT_CIE_LENGTH
+ 8, 0, 0, 0, /* CIE pointer */
5289 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
5290 0, 0, 0, 0, /* .plt size goes here */
5291 0, /* Augmentation size */
5292 DW_CFA_def_cfa_offset
, 8, /* DW_CFA_def_cfa_offset: 8 */
5293 DW_CFA_advance_loc
+ 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
5294 DW_CFA_def_cfa_offset
, 12, /* DW_CFA_def_cfa_offset: 12 */
5295 DW_CFA_advance_loc
+ 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
5296 DW_CFA_def_cfa_expression
, /* DW_CFA_def_cfa_expression */
5297 13, /* Block length */
5298 DW_OP_breg4
, 4, /* DW_OP_breg4 (esp): 4 */
5299 DW_OP_breg8
, 0, /* DW_OP_breg8 (eip): 0 */
5300 DW_OP_const1u
, 63, DW_OP_and
, DW_OP_const1u
, 37, DW_OP_ge
,
5301 DW_OP_lit2
, DW_OP_shl
, DW_OP_plus
,
5302 DW_CFA_nop
, DW_CFA_nop
5305 static const struct elf_i386_plt_layout elf_i386_nacl_plt
=
5307 elf_i386_nacl_plt0_entry
, /* plt0_entry */
5308 sizeof (elf_i386_nacl_plt0_entry
), /* plt0_entry_size */
5309 2, /* plt0_got1_offset */
5310 8, /* plt0_got2_offset */
5311 elf_i386_nacl_plt_entry
, /* plt_entry */
5312 NACL_PLT_ENTRY_SIZE
, /* plt_entry_size */
5313 2, /* plt_got_offset */
5314 33, /* plt_reloc_offset */
5315 38, /* plt_plt_offset */
5316 32, /* plt_lazy_offset */
5317 elf_i386_nacl_pic_plt0_entry
, /* pic_plt0_entry */
5318 elf_i386_nacl_pic_plt_entry
, /* pic_plt_entry */
5319 elf_i386_nacl_eh_frame_plt
, /* eh_frame_plt */
5320 sizeof (elf_i386_nacl_eh_frame_plt
),/* eh_frame_plt_size */
5323 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed
=
5325 &elf_i386_nacl_plt
, /* plt */
5326 0x90, /* plt0_pad_byte: nop insn */
5330 #undef elf_backend_arch_data
5331 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
5333 #undef elf_backend_modify_segment_map
5334 #define elf_backend_modify_segment_map nacl_modify_segment_map
5335 #undef elf_backend_modify_program_headers
5336 #define elf_backend_modify_program_headers nacl_modify_program_headers
5338 #include "elf32-target.h"
5340 /* Restore defaults. */
5341 #undef elf_backend_modify_segment_map
5342 #undef elf_backend_modify_program_headers
5344 /* VxWorks support. */
5346 #undef TARGET_LITTLE_SYM
5347 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
5348 #undef TARGET_LITTLE_NAME
5349 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
5351 #undef elf_backend_plt_alignment
5352 #define elf_backend_plt_alignment 4
5354 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed
=
5356 &elf_i386_plt
, /* plt */
5357 0x90, /* plt0_pad_byte */
5361 #undef elf_backend_arch_data
5362 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
5364 #undef elf_backend_relocs_compatible
5365 #undef elf_backend_post_process_headers
5366 #undef elf_backend_add_symbol_hook
5367 #define elf_backend_add_symbol_hook \
5368 elf_vxworks_add_symbol_hook
5369 #undef elf_backend_link_output_symbol_hook
5370 #define elf_backend_link_output_symbol_hook \
5371 elf_vxworks_link_output_symbol_hook
5372 #undef elf_backend_emit_relocs
5373 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
5374 #undef elf_backend_final_write_processing
5375 #define elf_backend_final_write_processing \
5376 elf_vxworks_final_write_processing
5377 #undef elf_backend_static_tls_alignment
5379 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
5381 #undef elf_backend_want_plt_sym
5382 #define elf_backend_want_plt_sym 1
5385 #define elf32_bed elf32_i386_vxworks_bed
5387 #include "elf32-target.h"