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 Free Software Foundation, Inc.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 #include "elf-vxworks.h"
28 /* 386 uses REL relocations instead of RELA. */
33 static reloc_howto_type elf_howto_table
[]=
35 HOWTO(R_386_NONE
, 0, 0, 0, FALSE
, 0, complain_overflow_bitfield
,
36 bfd_elf_generic_reloc
, "R_386_NONE",
37 TRUE
, 0x00000000, 0x00000000, FALSE
),
38 HOWTO(R_386_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
39 bfd_elf_generic_reloc
, "R_386_32",
40 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
41 HOWTO(R_386_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
42 bfd_elf_generic_reloc
, "R_386_PC32",
43 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
44 HOWTO(R_386_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
45 bfd_elf_generic_reloc
, "R_386_GOT32",
46 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
47 HOWTO(R_386_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
48 bfd_elf_generic_reloc
, "R_386_PLT32",
49 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
50 HOWTO(R_386_COPY
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
51 bfd_elf_generic_reloc
, "R_386_COPY",
52 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
53 HOWTO(R_386_GLOB_DAT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
54 bfd_elf_generic_reloc
, "R_386_GLOB_DAT",
55 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
56 HOWTO(R_386_JUMP_SLOT
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
57 bfd_elf_generic_reloc
, "R_386_JUMP_SLOT",
58 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
59 HOWTO(R_386_RELATIVE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_386_RELATIVE",
61 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
62 HOWTO(R_386_GOTOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_386_GOTOFF",
64 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
65 HOWTO(R_386_GOTPC
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_386_GOTPC",
67 TRUE
, 0xffffffff, 0xffffffff, TRUE
),
69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
73 #define R_386_standard (R_386_GOTPC + 1)
74 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
76 /* These relocs are a GNU extension. */
77 HOWTO(R_386_TLS_TPOFF
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF",
79 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
80 HOWTO(R_386_TLS_IE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_386_TLS_IE",
82 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
83 HOWTO(R_386_TLS_GOTIE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_386_TLS_GOTIE",
85 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
86 HOWTO(R_386_TLS_LE
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_386_TLS_LE",
88 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO(R_386_TLS_GD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_386_TLS_GD",
91 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
92 HOWTO(R_386_TLS_LDM
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_386_TLS_LDM",
94 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
95 HOWTO(R_386_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_386_16",
97 TRUE
, 0xffff, 0xffff, FALSE
),
98 HOWTO(R_386_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_386_PC16",
100 TRUE
, 0xffff, 0xffff, TRUE
),
101 HOWTO(R_386_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_386_8",
103 TRUE
, 0xff, 0xff, FALSE
),
104 HOWTO(R_386_PC8
, 0, 0, 8, TRUE
, 0, complain_overflow_signed
,
105 bfd_elf_generic_reloc
, "R_386_PC8",
106 TRUE
, 0xff, 0xff, TRUE
),
108 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
110 /* These are common with Solaris TLS implementation. */
111 HOWTO(R_386_TLS_LDO_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_386_TLS_LDO_32",
113 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
114 HOWTO(R_386_TLS_IE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
115 bfd_elf_generic_reloc
, "R_386_TLS_IE_32",
116 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
117 HOWTO(R_386_TLS_LE_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_386_TLS_LE_32",
119 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
120 HOWTO(R_386_TLS_DTPMOD32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_386_TLS_DTPMOD32",
122 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
123 HOWTO(R_386_TLS_DTPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_386_TLS_DTPOFF32",
125 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
126 HOWTO(R_386_TLS_TPOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_386_TLS_TPOFF32",
128 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
130 HOWTO(R_386_TLS_GOTDESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
131 bfd_elf_generic_reloc
, "R_386_TLS_GOTDESC",
132 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
133 HOWTO(R_386_TLS_DESC_CALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
134 bfd_elf_generic_reloc
, "R_386_TLS_DESC_CALL",
136 HOWTO(R_386_TLS_DESC
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
137 bfd_elf_generic_reloc
, "R_386_TLS_DESC",
138 TRUE
, 0xffffffff, 0xffffffff, FALSE
),
141 #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
142 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
144 /* GNU extension to record C++ vtable hierarchy. */
145 HOWTO (R_386_GNU_VTINHERIT
, /* type */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
149 FALSE
, /* pc_relative */
151 complain_overflow_dont
, /* complain_on_overflow */
152 NULL
, /* special_function */
153 "R_386_GNU_VTINHERIT", /* name */
154 FALSE
, /* partial_inplace */
157 FALSE
), /* pcrel_offset */
159 /* GNU extension to record C++ vtable member usage. */
160 HOWTO (R_386_GNU_VTENTRY
, /* type */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
164 FALSE
, /* pc_relative */
166 complain_overflow_dont
, /* complain_on_overflow */
167 _bfd_elf_rel_vtable_reloc_fn
, /* special_function */
168 "R_386_GNU_VTENTRY", /* name */
169 FALSE
, /* partial_inplace */
172 FALSE
) /* pcrel_offset */
174 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
178 #ifdef DEBUG_GEN_RELOC
180 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
185 static reloc_howto_type
*
186 elf_i386_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
187 bfd_reloc_code_real_type code
)
192 TRACE ("BFD_RELOC_NONE");
193 return &elf_howto_table
[R_386_NONE
];
196 TRACE ("BFD_RELOC_32");
197 return &elf_howto_table
[R_386_32
];
200 TRACE ("BFD_RELOC_CTOR");
201 return &elf_howto_table
[R_386_32
];
203 case BFD_RELOC_32_PCREL
:
204 TRACE ("BFD_RELOC_PC32");
205 return &elf_howto_table
[R_386_PC32
];
207 case BFD_RELOC_386_GOT32
:
208 TRACE ("BFD_RELOC_386_GOT32");
209 return &elf_howto_table
[R_386_GOT32
];
211 case BFD_RELOC_386_PLT32
:
212 TRACE ("BFD_RELOC_386_PLT32");
213 return &elf_howto_table
[R_386_PLT32
];
215 case BFD_RELOC_386_COPY
:
216 TRACE ("BFD_RELOC_386_COPY");
217 return &elf_howto_table
[R_386_COPY
];
219 case BFD_RELOC_386_GLOB_DAT
:
220 TRACE ("BFD_RELOC_386_GLOB_DAT");
221 return &elf_howto_table
[R_386_GLOB_DAT
];
223 case BFD_RELOC_386_JUMP_SLOT
:
224 TRACE ("BFD_RELOC_386_JUMP_SLOT");
225 return &elf_howto_table
[R_386_JUMP_SLOT
];
227 case BFD_RELOC_386_RELATIVE
:
228 TRACE ("BFD_RELOC_386_RELATIVE");
229 return &elf_howto_table
[R_386_RELATIVE
];
231 case BFD_RELOC_386_GOTOFF
:
232 TRACE ("BFD_RELOC_386_GOTOFF");
233 return &elf_howto_table
[R_386_GOTOFF
];
235 case BFD_RELOC_386_GOTPC
:
236 TRACE ("BFD_RELOC_386_GOTPC");
237 return &elf_howto_table
[R_386_GOTPC
];
239 /* These relocs are a GNU extension. */
240 case BFD_RELOC_386_TLS_TPOFF
:
241 TRACE ("BFD_RELOC_386_TLS_TPOFF");
242 return &elf_howto_table
[R_386_TLS_TPOFF
- R_386_ext_offset
];
244 case BFD_RELOC_386_TLS_IE
:
245 TRACE ("BFD_RELOC_386_TLS_IE");
246 return &elf_howto_table
[R_386_TLS_IE
- R_386_ext_offset
];
248 case BFD_RELOC_386_TLS_GOTIE
:
249 TRACE ("BFD_RELOC_386_TLS_GOTIE");
250 return &elf_howto_table
[R_386_TLS_GOTIE
- R_386_ext_offset
];
252 case BFD_RELOC_386_TLS_LE
:
253 TRACE ("BFD_RELOC_386_TLS_LE");
254 return &elf_howto_table
[R_386_TLS_LE
- R_386_ext_offset
];
256 case BFD_RELOC_386_TLS_GD
:
257 TRACE ("BFD_RELOC_386_TLS_GD");
258 return &elf_howto_table
[R_386_TLS_GD
- R_386_ext_offset
];
260 case BFD_RELOC_386_TLS_LDM
:
261 TRACE ("BFD_RELOC_386_TLS_LDM");
262 return &elf_howto_table
[R_386_TLS_LDM
- R_386_ext_offset
];
265 TRACE ("BFD_RELOC_16");
266 return &elf_howto_table
[R_386_16
- R_386_ext_offset
];
268 case BFD_RELOC_16_PCREL
:
269 TRACE ("BFD_RELOC_16_PCREL");
270 return &elf_howto_table
[R_386_PC16
- R_386_ext_offset
];
273 TRACE ("BFD_RELOC_8");
274 return &elf_howto_table
[R_386_8
- R_386_ext_offset
];
276 case BFD_RELOC_8_PCREL
:
277 TRACE ("BFD_RELOC_8_PCREL");
278 return &elf_howto_table
[R_386_PC8
- R_386_ext_offset
];
280 /* Common with Sun TLS implementation. */
281 case BFD_RELOC_386_TLS_LDO_32
:
282 TRACE ("BFD_RELOC_386_TLS_LDO_32");
283 return &elf_howto_table
[R_386_TLS_LDO_32
- R_386_tls_offset
];
285 case BFD_RELOC_386_TLS_IE_32
:
286 TRACE ("BFD_RELOC_386_TLS_IE_32");
287 return &elf_howto_table
[R_386_TLS_IE_32
- R_386_tls_offset
];
289 case BFD_RELOC_386_TLS_LE_32
:
290 TRACE ("BFD_RELOC_386_TLS_LE_32");
291 return &elf_howto_table
[R_386_TLS_LE_32
- R_386_tls_offset
];
293 case BFD_RELOC_386_TLS_DTPMOD32
:
294 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
295 return &elf_howto_table
[R_386_TLS_DTPMOD32
- R_386_tls_offset
];
297 case BFD_RELOC_386_TLS_DTPOFF32
:
298 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
299 return &elf_howto_table
[R_386_TLS_DTPOFF32
- R_386_tls_offset
];
301 case BFD_RELOC_386_TLS_TPOFF32
:
302 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
303 return &elf_howto_table
[R_386_TLS_TPOFF32
- R_386_tls_offset
];
305 case BFD_RELOC_386_TLS_GOTDESC
:
306 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
307 return &elf_howto_table
[R_386_TLS_GOTDESC
- R_386_tls_offset
];
309 case BFD_RELOC_386_TLS_DESC_CALL
:
310 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
311 return &elf_howto_table
[R_386_TLS_DESC_CALL
- R_386_tls_offset
];
313 case BFD_RELOC_386_TLS_DESC
:
314 TRACE ("BFD_RELOC_386_TLS_DESC");
315 return &elf_howto_table
[R_386_TLS_DESC
- R_386_tls_offset
];
317 case BFD_RELOC_VTABLE_INHERIT
:
318 TRACE ("BFD_RELOC_VTABLE_INHERIT");
319 return &elf_howto_table
[R_386_GNU_VTINHERIT
- R_386_vt_offset
];
321 case BFD_RELOC_VTABLE_ENTRY
:
322 TRACE ("BFD_RELOC_VTABLE_ENTRY");
323 return &elf_howto_table
[R_386_GNU_VTENTRY
- R_386_vt_offset
];
334 elf_i386_info_to_howto_rel (bfd
*abfd ATTRIBUTE_UNUSED
,
336 Elf_Internal_Rela
*dst
)
338 unsigned int r_type
= ELF32_R_TYPE (dst
->r_info
);
341 if ((indx
= r_type
) >= R_386_standard
342 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
343 >= R_386_ext
- R_386_standard
)
344 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
345 >= R_386_tls
- R_386_ext
)
346 && ((indx
= r_type
- R_386_vt_offset
) - R_386_tls
347 >= R_386_vt
- R_386_tls
))
349 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
353 cache_ptr
->howto
= &elf_howto_table
[indx
];
356 /* Return whether a symbol name implies a local label. The UnixWare
357 2.1 cc generates temporary symbols that start with .X, so we
358 recognize them here. FIXME: do other SVR4 compilers also use .X?.
359 If so, we should move the .X recognition into
360 _bfd_elf_is_local_label_name. */
363 elf_i386_is_local_label_name (bfd
*abfd
, const char *name
)
365 if (name
[0] == '.' && name
[1] == 'X')
368 return _bfd_elf_is_local_label_name (abfd
, name
);
371 /* Support for core dump NOTE sections. */
374 elf_i386_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
379 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
381 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
387 elf_tdata (abfd
)->core_signal
= bfd_get_32 (abfd
, note
->descdata
+ 20);
390 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
394 size
= bfd_get_32 (abfd
, note
->descdata
+ 8);
398 switch (note
->descsz
)
403 case 144: /* Linux/i386 */
405 elf_tdata (abfd
)->core_signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
408 elf_tdata (abfd
)->core_pid
= bfd_get_32 (abfd
, note
->descdata
+ 24);
418 /* Make a ".reg/999" section. */
419 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
420 size
, note
->descpos
+ offset
);
424 elf_i386_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
426 if (note
->namesz
== 8 && strcmp (note
->namedata
, "FreeBSD") == 0)
428 int pr_version
= bfd_get_32 (abfd
, note
->descdata
);
433 elf_tdata (abfd
)->core_program
434 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 8, 17);
435 elf_tdata (abfd
)->core_command
436 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 25, 81);
440 switch (note
->descsz
)
445 case 124: /* Linux/i386 elf_prpsinfo. */
446 elf_tdata (abfd
)->core_program
447 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 28, 16);
448 elf_tdata (abfd
)->core_command
449 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 44, 80);
453 /* Note that for some reason, a spurious space is tacked
454 onto the end of the args in some (at least one anyway)
455 implementations, so strip it off if it exists. */
457 char *command
= elf_tdata (abfd
)->core_command
;
458 int n
= strlen (command
);
460 if (0 < n
&& command
[n
- 1] == ' ')
461 command
[n
- 1] = '\0';
467 /* Functions for the i386 ELF linker.
469 In order to gain some understanding of code in this file without
470 knowing all the intricate details of the linker, note the
473 Functions named elf_i386_* are called by external routines, other
474 functions are only called locally. elf_i386_* functions appear
475 in this file more or less in the order in which they are called
476 from external routines. eg. elf_i386_check_relocs is called
477 early in the link process, elf_i386_finish_dynamic_sections is
478 one of the last functions. */
481 /* The name of the dynamic interpreter. This is put in the .interp
484 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
486 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
487 copying dynamic variables from a shared lib into an app's dynbss
488 section, and instead use a dynamic relocation to point into the
490 #define ELIMINATE_COPY_RELOCS 1
492 /* The size in bytes of an entry in the procedure linkage table. */
494 #define PLT_ENTRY_SIZE 16
496 /* The first entry in an absolute procedure linkage table looks like
497 this. See the SVR4 ABI i386 supplement to see how this works.
498 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
500 static const bfd_byte elf_i386_plt0_entry
[12] =
502 0xff, 0x35, /* pushl contents of address */
503 0, 0, 0, 0, /* replaced with address of .got + 4. */
504 0xff, 0x25, /* jmp indirect */
505 0, 0, 0, 0 /* replaced with address of .got + 8. */
508 /* Subsequent entries in an absolute procedure linkage table look like
511 static const bfd_byte elf_i386_plt_entry
[PLT_ENTRY_SIZE
] =
513 0xff, 0x25, /* jmp indirect */
514 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
515 0x68, /* pushl immediate */
516 0, 0, 0, 0, /* replaced with offset into relocation table. */
517 0xe9, /* jmp relative */
518 0, 0, 0, 0 /* replaced with offset to start of .plt. */
521 /* The first entry in a PIC procedure linkage table look like this.
522 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
524 static const bfd_byte elf_i386_pic_plt0_entry
[12] =
526 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
527 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
530 /* Subsequent entries in a PIC procedure linkage table look like this. */
532 static const bfd_byte elf_i386_pic_plt_entry
[PLT_ENTRY_SIZE
] =
534 0xff, 0xa3, /* jmp *offset(%ebx) */
535 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
536 0x68, /* pushl immediate */
537 0, 0, 0, 0, /* replaced with offset into relocation table. */
538 0xe9, /* jmp relative */
539 0, 0, 0, 0 /* replaced with offset to start of .plt. */
542 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
543 for the PLTResolve stub and then for each PLT entry. */
544 #define PLTRESOLVE_RELOCS_SHLIB 0
545 #define PLTRESOLVE_RELOCS 2
546 #define PLT_NON_JUMP_SLOT_RELOCS 2
548 /* The i386 linker needs to keep track of the number of relocs that it
549 decides to copy as dynamic relocs in check_relocs for each symbol.
550 This is so that it can later discard them if they are found to be
551 unnecessary. We store the information in a field extending the
552 regular ELF linker hash table. */
554 struct elf_i386_dyn_relocs
556 struct elf_i386_dyn_relocs
*next
;
558 /* The input section of the reloc. */
561 /* Total number of relocs copied for the input section. */
564 /* Number of pc-relative relocs copied for the input section. */
565 bfd_size_type pc_count
;
568 /* i386 ELF linker hash entry. */
570 struct elf_i386_link_hash_entry
572 struct elf_link_hash_entry elf
;
574 /* Track dynamic relocs copied for this symbol. */
575 struct elf_i386_dyn_relocs
*dyn_relocs
;
577 #define GOT_UNKNOWN 0
581 #define GOT_TLS_IE_POS 5
582 #define GOT_TLS_IE_NEG 6
583 #define GOT_TLS_IE_BOTH 7
584 #define GOT_TLS_GDESC 8
585 #define GOT_TLS_MASK 0x0f
586 #define GOT_TLS_IE_IE 0x10
587 #define GOT_TLS_IE_GD 0x20
588 #define GOT_TLS_IE_MASK 0x30
589 #define GOT_TLS_GD_BOTH_P(type) \
590 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
591 #define GOT_TLS_GD_P(type) \
592 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
593 #define GOT_TLS_GDESC_P(type) \
594 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
595 #define GOT_TLS_GD_ANY_P(type) \
596 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
597 unsigned char tls_type
;
599 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
600 starting at the end of the jump table. */
604 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
606 struct elf_i386_obj_tdata
608 struct elf_obj_tdata root
;
610 /* tls_type for each local got entry. */
611 char *local_got_tls_type
;
613 /* GOTPLT entries for TLS descriptors. */
614 bfd_vma
*local_tlsdesc_gotent
;
617 #define elf_i386_tdata(abfd) \
618 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
620 #define elf_i386_local_got_tls_type(abfd) \
621 (elf_i386_tdata (abfd)->local_got_tls_type)
623 #define elf_i386_local_tlsdesc_gotent(abfd) \
624 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
627 elf_i386_mkobject (bfd
*abfd
)
629 if (abfd
->tdata
.any
== NULL
)
631 bfd_size_type amt
= sizeof (struct elf_i386_obj_tdata
);
632 abfd
->tdata
.any
= bfd_zalloc (abfd
, amt
);
633 if (abfd
->tdata
.any
== NULL
)
636 return bfd_elf_mkobject (abfd
);
639 /* i386 ELF linker hash table. */
641 struct elf_i386_link_hash_table
643 struct elf_link_hash_table elf
;
645 /* Short-cuts to get to dynamic linker sections. */
654 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
657 /* True if the target system is VxWorks. */
660 /* Value used to fill the last word of the first plt entry. */
661 bfd_byte plt0_pad_byte
;
663 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
664 bfd_vma next_tls_desc_index
;
667 bfd_signed_vma refcount
;
671 /* The amount of space used by the reserved portion of the sgotplt
672 section, plus whatever space is used by the jump slots. */
673 bfd_vma sgotplt_jump_table_size
;
675 /* Small local sym to section mapping cache. */
676 struct sym_sec_cache sym_sec
;
679 /* Get the i386 ELF linker hash table from a link_info structure. */
681 #define elf_i386_hash_table(p) \
682 ((struct elf_i386_link_hash_table *) ((p)->hash))
684 #define elf_i386_compute_jump_table_size(htab) \
685 ((htab)->next_tls_desc_index * 4)
687 /* Create an entry in an i386 ELF linker hash table. */
689 static struct bfd_hash_entry
*
690 link_hash_newfunc (struct bfd_hash_entry
*entry
,
691 struct bfd_hash_table
*table
,
694 /* Allocate the structure if it has not already been allocated by a
698 entry
= bfd_hash_allocate (table
,
699 sizeof (struct elf_i386_link_hash_entry
));
704 /* Call the allocation method of the superclass. */
705 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
708 struct elf_i386_link_hash_entry
*eh
;
710 eh
= (struct elf_i386_link_hash_entry
*) entry
;
711 eh
->dyn_relocs
= NULL
;
712 eh
->tls_type
= GOT_UNKNOWN
;
713 eh
->tlsdesc_got
= (bfd_vma
) -1;
719 /* Create an i386 ELF linker hash table. */
721 static struct bfd_link_hash_table
*
722 elf_i386_link_hash_table_create (bfd
*abfd
)
724 struct elf_i386_link_hash_table
*ret
;
725 bfd_size_type amt
= sizeof (struct elf_i386_link_hash_table
);
727 ret
= bfd_malloc (amt
);
731 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
732 sizeof (struct elf_i386_link_hash_entry
)))
745 ret
->tls_ldm_got
.refcount
= 0;
746 ret
->next_tls_desc_index
= 0;
747 ret
->sgotplt_jump_table_size
= 0;
748 ret
->sym_sec
.abfd
= NULL
;
750 ret
->srelplt2
= NULL
;
751 ret
->plt0_pad_byte
= 0;
753 return &ret
->elf
.root
;
756 /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
757 shortcuts to them in our hash table. */
760 create_got_section (bfd
*dynobj
, struct bfd_link_info
*info
)
762 struct elf_i386_link_hash_table
*htab
;
764 if (! _bfd_elf_create_got_section (dynobj
, info
))
767 htab
= elf_i386_hash_table (info
);
768 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
769 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
770 if (!htab
->sgot
|| !htab
->sgotplt
)
773 htab
->srelgot
= bfd_make_section_with_flags (dynobj
, ".rel.got",
774 (SEC_ALLOC
| SEC_LOAD
779 if (htab
->srelgot
== NULL
780 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 2))
785 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
786 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
790 elf_i386_create_dynamic_sections (bfd
*dynobj
, struct bfd_link_info
*info
)
792 struct elf_i386_link_hash_table
*htab
;
794 htab
= elf_i386_hash_table (info
);
795 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
798 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
801 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
802 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rel.plt");
803 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
805 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rel.bss");
807 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
808 || (!info
->shared
&& !htab
->srelbss
))
812 && !elf_vxworks_create_dynamic_sections (dynobj
, info
, &htab
->srelplt2
))
818 /* Copy the extra info we tack onto an elf_link_hash_entry. */
821 elf_i386_copy_indirect_symbol (struct bfd_link_info
*info
,
822 struct elf_link_hash_entry
*dir
,
823 struct elf_link_hash_entry
*ind
)
825 struct elf_i386_link_hash_entry
*edir
, *eind
;
827 edir
= (struct elf_i386_link_hash_entry
*) dir
;
828 eind
= (struct elf_i386_link_hash_entry
*) ind
;
830 if (eind
->dyn_relocs
!= NULL
)
832 if (edir
->dyn_relocs
!= NULL
)
834 struct elf_i386_dyn_relocs
**pp
;
835 struct elf_i386_dyn_relocs
*p
;
837 /* Add reloc counts against the indirect sym to the direct sym
838 list. Merge any entries against the same section. */
839 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
841 struct elf_i386_dyn_relocs
*q
;
843 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
844 if (q
->sec
== p
->sec
)
846 q
->pc_count
+= p
->pc_count
;
847 q
->count
+= p
->count
;
854 *pp
= edir
->dyn_relocs
;
857 edir
->dyn_relocs
= eind
->dyn_relocs
;
858 eind
->dyn_relocs
= NULL
;
861 if (ind
->root
.type
== bfd_link_hash_indirect
862 && dir
->got
.refcount
<= 0)
864 edir
->tls_type
= eind
->tls_type
;
865 eind
->tls_type
= GOT_UNKNOWN
;
868 if (ELIMINATE_COPY_RELOCS
869 && ind
->root
.type
!= bfd_link_hash_indirect
870 && dir
->dynamic_adjusted
)
872 /* If called to transfer flags for a weakdef during processing
873 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
874 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
875 dir
->ref_dynamic
|= ind
->ref_dynamic
;
876 dir
->ref_regular
|= ind
->ref_regular
;
877 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
878 dir
->needs_plt
|= ind
->needs_plt
;
879 dir
->pointer_equality_needed
|= ind
->pointer_equality_needed
;
882 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
886 elf_i386_tls_transition (struct bfd_link_info
*info
, int r_type
, int is_local
)
894 case R_386_TLS_GOTDESC
:
895 case R_386_TLS_DESC_CALL
:
896 case R_386_TLS_IE_32
:
898 return R_386_TLS_LE_32
;
899 return R_386_TLS_IE_32
;
901 case R_386_TLS_GOTIE
:
903 return R_386_TLS_LE_32
;
906 return R_386_TLS_LE_32
;
912 /* Look through the relocs for a section during the first phase, and
913 calculate needed space in the global offset table, procedure linkage
914 table, and dynamic reloc sections. */
917 elf_i386_check_relocs (bfd
*abfd
,
918 struct bfd_link_info
*info
,
920 const Elf_Internal_Rela
*relocs
)
922 struct elf_i386_link_hash_table
*htab
;
923 Elf_Internal_Shdr
*symtab_hdr
;
924 struct elf_link_hash_entry
**sym_hashes
;
925 const Elf_Internal_Rela
*rel
;
926 const Elf_Internal_Rela
*rel_end
;
929 if (info
->relocatable
)
932 htab
= elf_i386_hash_table (info
);
933 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
934 sym_hashes
= elf_sym_hashes (abfd
);
938 rel_end
= relocs
+ sec
->reloc_count
;
939 for (rel
= relocs
; rel
< rel_end
; rel
++)
942 unsigned long r_symndx
;
943 struct elf_link_hash_entry
*h
;
945 r_symndx
= ELF32_R_SYM (rel
->r_info
);
946 r_type
= ELF32_R_TYPE (rel
->r_info
);
948 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
950 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
956 if (r_symndx
< symtab_hdr
->sh_info
)
960 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
961 while (h
->root
.type
== bfd_link_hash_indirect
962 || h
->root
.type
== bfd_link_hash_warning
)
963 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
966 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
971 htab
->tls_ldm_got
.refcount
+= 1;
975 /* This symbol requires a procedure linkage table entry. We
976 actually build the entry in adjust_dynamic_symbol,
977 because this might be a case of linking PIC code which is
978 never referenced by a dynamic object, in which case we
979 don't need to generate a procedure linkage table entry
982 /* If this is a local symbol, we resolve it directly without
983 creating a procedure linkage table entry. */
988 h
->plt
.refcount
+= 1;
991 case R_386_TLS_IE_32
:
993 case R_386_TLS_GOTIE
:
995 info
->flags
|= DF_STATIC_TLS
;
1000 case R_386_TLS_GOTDESC
:
1001 case R_386_TLS_DESC_CALL
:
1002 /* This symbol requires a global offset table entry. */
1004 int tls_type
, old_tls_type
;
1009 case R_386_GOT32
: tls_type
= GOT_NORMAL
; break;
1010 case R_386_TLS_GD
: tls_type
= GOT_TLS_GD
; break;
1011 case R_386_TLS_GOTDESC
:
1012 case R_386_TLS_DESC_CALL
:
1013 tls_type
= GOT_TLS_GDESC
; break;
1014 case R_386_TLS_IE_32
:
1015 if (ELF32_R_TYPE (rel
->r_info
) == r_type
)
1016 tls_type
= GOT_TLS_IE_NEG
;
1018 && ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
1019 /* If this is a GD->IE transition, we may use either
1020 of R_386_TLS_TPOFF and R_386_TLS_TPOFF32. But if
1021 we may have both R_386_TLS_IE and R_386_TLS_GD,
1022 we can't share the same R_386_TLS_TPOFF since
1023 they require different offsets. So we remember
1024 it comes from R_386_TLS_GD. */
1025 tls_type
= GOT_TLS_IE
| GOT_TLS_IE_GD
;
1027 tls_type
= GOT_TLS_IE
;
1032 /* We remember it comes from R_386_TLS_IE. */
1033 tls_type
= GOT_TLS_IE_POS
| GOT_TLS_IE_IE
;
1036 case R_386_TLS_GOTIE
:
1037 tls_type
= GOT_TLS_IE_POS
; break;
1042 h
->got
.refcount
+= 1;
1043 old_tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1047 bfd_signed_vma
*local_got_refcounts
;
1049 /* This is a global offset table entry for a local symbol. */
1050 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1051 if (local_got_refcounts
== NULL
)
1055 size
= symtab_hdr
->sh_info
;
1056 size
*= (sizeof (bfd_signed_vma
)
1057 + sizeof (bfd_vma
) + sizeof(char));
1058 local_got_refcounts
= bfd_zalloc (abfd
, size
);
1059 if (local_got_refcounts
== NULL
)
1061 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
1062 elf_i386_local_tlsdesc_gotent (abfd
)
1063 = (bfd_vma
*) (local_got_refcounts
+ symtab_hdr
->sh_info
);
1064 elf_i386_local_got_tls_type (abfd
)
1065 = (char *) (local_got_refcounts
+ 2 * symtab_hdr
->sh_info
);
1067 local_got_refcounts
[r_symndx
] += 1;
1068 old_tls_type
= elf_i386_local_got_tls_type (abfd
) [r_symndx
];
1071 if ((old_tls_type
& GOT_TLS_IE
) && (tls_type
& GOT_TLS_IE
))
1072 tls_type
|= old_tls_type
;
1073 /* If a TLS symbol is accessed using IE at least once,
1074 there is no point to use dynamic model for it. */
1075 else if (old_tls_type
!= tls_type
1076 && old_tls_type
!= GOT_UNKNOWN
1077 && (! GOT_TLS_GD_ANY_P (old_tls_type
)
1078 || (tls_type
& GOT_TLS_IE
) == 0))
1080 if ((old_tls_type
& GOT_TLS_IE
) && GOT_TLS_GD_ANY_P (tls_type
))
1081 tls_type
= old_tls_type
;
1082 else if (GOT_TLS_GD_ANY_P (old_tls_type
)
1083 && GOT_TLS_GD_ANY_P (tls_type
))
1084 tls_type
|= old_tls_type
;
1087 (*_bfd_error_handler
)
1088 (_("%B: `%s' accessed both as normal and "
1089 "thread local symbol"),
1091 h
? h
->root
.root
.string
: "<local>");
1096 if (old_tls_type
!= tls_type
)
1099 elf_i386_hash_entry (h
)->tls_type
= tls_type
;
1101 elf_i386_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1109 if (htab
->sgot
== NULL
)
1111 if (htab
->elf
.dynobj
== NULL
)
1112 htab
->elf
.dynobj
= abfd
;
1113 if (!create_got_section (htab
->elf
.dynobj
, info
))
1116 if (r_type
!= R_386_TLS_IE
)
1120 case R_386_TLS_LE_32
:
1124 info
->flags
|= DF_STATIC_TLS
;
1129 if (h
!= NULL
&& !info
->shared
)
1131 /* If this reloc is in a read-only section, we might
1132 need a copy reloc. We can't check reliably at this
1133 stage whether the section is read-only, as input
1134 sections have not yet been mapped to output sections.
1135 Tentatively set the flag for now, and correct in
1136 adjust_dynamic_symbol. */
1139 /* We may need a .plt entry if the function this reloc
1140 refers to is in a shared lib. */
1141 h
->plt
.refcount
+= 1;
1142 if (r_type
!= R_386_PC32
)
1143 h
->pointer_equality_needed
= 1;
1146 /* If we are creating a shared library, and this is a reloc
1147 against a global symbol, or a non PC relative reloc
1148 against a local symbol, then we need to copy the reloc
1149 into the shared library. However, if we are linking with
1150 -Bsymbolic, we do not need to copy a reloc against a
1151 global symbol which is defined in an object we are
1152 including in the link (i.e., DEF_REGULAR is set). At
1153 this point we have not seen all the input files, so it is
1154 possible that DEF_REGULAR is not set now but will be set
1155 later (it is never cleared). In case of a weak definition,
1156 DEF_REGULAR may be cleared later by a strong definition in
1157 a shared library. We account for that possibility below by
1158 storing information in the relocs_copied field of the hash
1159 table entry. A similar situation occurs when creating
1160 shared libraries and symbol visibility changes render the
1163 If on the other hand, we are creating an executable, we
1164 may need to keep relocations for symbols satisfied by a
1165 dynamic library if we manage to avoid copy relocs for the
1168 && (sec
->flags
& SEC_ALLOC
) != 0
1169 && (r_type
!= R_386_PC32
1171 && (! info
->symbolic
1172 || h
->root
.type
== bfd_link_hash_defweak
1173 || !h
->def_regular
))))
1174 || (ELIMINATE_COPY_RELOCS
1176 && (sec
->flags
& SEC_ALLOC
) != 0
1178 && (h
->root
.type
== bfd_link_hash_defweak
1179 || !h
->def_regular
)))
1181 struct elf_i386_dyn_relocs
*p
;
1182 struct elf_i386_dyn_relocs
**head
;
1184 /* We must copy these reloc types into the output file.
1185 Create a reloc section in dynobj and make room for
1191 unsigned int strndx
= elf_elfheader (abfd
)->e_shstrndx
;
1192 unsigned int shnam
= elf_section_data (sec
)->rel_hdr
.sh_name
;
1194 name
= bfd_elf_string_from_elf_section (abfd
, strndx
, shnam
);
1198 if (strncmp (name
, ".rel", 4) != 0
1199 || strcmp (bfd_get_section_name (abfd
, sec
),
1202 (*_bfd_error_handler
)
1203 (_("%B: bad relocation section name `%s\'"),
1207 if (htab
->elf
.dynobj
== NULL
)
1208 htab
->elf
.dynobj
= abfd
;
1210 dynobj
= htab
->elf
.dynobj
;
1211 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1216 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
1217 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1218 if ((sec
->flags
& SEC_ALLOC
) != 0)
1219 flags
|= SEC_ALLOC
| SEC_LOAD
;
1220 sreloc
= bfd_make_section_with_flags (dynobj
,
1224 || ! bfd_set_section_alignment (dynobj
, sreloc
, 2))
1227 elf_section_data (sec
)->sreloc
= sreloc
;
1230 /* If this is a global symbol, we count the number of
1231 relocations we need for this symbol. */
1234 head
= &((struct elf_i386_link_hash_entry
*) h
)->dyn_relocs
;
1239 /* Track dynamic relocs needed for local syms too.
1240 We really need local syms available to do this
1244 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1249 vpp
= &elf_section_data (s
)->local_dynrel
;
1250 head
= (struct elf_i386_dyn_relocs
**)vpp
;
1254 if (p
== NULL
|| p
->sec
!= sec
)
1256 bfd_size_type amt
= sizeof *p
;
1257 p
= bfd_alloc (htab
->elf
.dynobj
, amt
);
1268 if (r_type
== R_386_PC32
)
1273 /* This relocation describes the C++ object vtable hierarchy.
1274 Reconstruct it for later use during GC. */
1275 case R_386_GNU_VTINHERIT
:
1276 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1280 /* This relocation describes which C++ vtable entries are actually
1281 used. Record for later use during GC. */
1282 case R_386_GNU_VTENTRY
:
1283 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_offset
))
1295 /* Return the section that should be marked against GC for a given
1299 elf_i386_gc_mark_hook (asection
*sec
,
1300 struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
1301 Elf_Internal_Rela
*rel
,
1302 struct elf_link_hash_entry
*h
,
1303 Elf_Internal_Sym
*sym
)
1307 switch (ELF32_R_TYPE (rel
->r_info
))
1309 case R_386_GNU_VTINHERIT
:
1310 case R_386_GNU_VTENTRY
:
1314 switch (h
->root
.type
)
1316 case bfd_link_hash_defined
:
1317 case bfd_link_hash_defweak
:
1318 return h
->root
.u
.def
.section
;
1320 case bfd_link_hash_common
:
1321 return h
->root
.u
.c
.p
->section
;
1329 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1334 /* Update the got entry reference counts for the section being removed. */
1337 elf_i386_gc_sweep_hook (bfd
*abfd
,
1338 struct bfd_link_info
*info
,
1340 const Elf_Internal_Rela
*relocs
)
1342 Elf_Internal_Shdr
*symtab_hdr
;
1343 struct elf_link_hash_entry
**sym_hashes
;
1344 bfd_signed_vma
*local_got_refcounts
;
1345 const Elf_Internal_Rela
*rel
, *relend
;
1347 elf_section_data (sec
)->local_dynrel
= NULL
;
1349 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1350 sym_hashes
= elf_sym_hashes (abfd
);
1351 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1353 relend
= relocs
+ sec
->reloc_count
;
1354 for (rel
= relocs
; rel
< relend
; rel
++)
1356 unsigned long r_symndx
;
1357 unsigned int r_type
;
1358 struct elf_link_hash_entry
*h
= NULL
;
1360 r_symndx
= ELF32_R_SYM (rel
->r_info
);
1361 if (r_symndx
>= symtab_hdr
->sh_info
)
1363 struct elf_i386_link_hash_entry
*eh
;
1364 struct elf_i386_dyn_relocs
**pp
;
1365 struct elf_i386_dyn_relocs
*p
;
1367 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1368 while (h
->root
.type
== bfd_link_hash_indirect
1369 || h
->root
.type
== bfd_link_hash_warning
)
1370 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1371 eh
= (struct elf_i386_link_hash_entry
*) h
;
1373 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1376 /* Everything must go for SEC. */
1382 r_type
= ELF32_R_TYPE (rel
->r_info
);
1383 r_type
= elf_i386_tls_transition (info
, r_type
, h
!= NULL
);
1387 if (elf_i386_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1388 elf_i386_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1392 case R_386_TLS_GOTDESC
:
1393 case R_386_TLS_DESC_CALL
:
1394 case R_386_TLS_IE_32
:
1396 case R_386_TLS_GOTIE
:
1400 if (h
->got
.refcount
> 0)
1401 h
->got
.refcount
-= 1;
1403 else if (local_got_refcounts
!= NULL
)
1405 if (local_got_refcounts
[r_symndx
] > 0)
1406 local_got_refcounts
[r_symndx
] -= 1;
1419 if (h
->plt
.refcount
> 0)
1420 h
->plt
.refcount
-= 1;
1432 /* Adjust a symbol defined by a dynamic object and referenced by a
1433 regular object. The current definition is in some section of the
1434 dynamic object, but we're not including those sections. We have to
1435 change the definition to something the rest of the link can
1439 elf_i386_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1440 struct elf_link_hash_entry
*h
)
1442 struct elf_i386_link_hash_table
*htab
;
1444 unsigned int power_of_two
;
1446 /* If this is a function, put it in the procedure linkage table. We
1447 will fill in the contents of the procedure linkage table later,
1448 when we know the address of the .got section. */
1449 if (h
->type
== STT_FUNC
1452 if (h
->plt
.refcount
<= 0
1453 || SYMBOL_CALLS_LOCAL (info
, h
)
1454 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1455 && h
->root
.type
== bfd_link_hash_undefweak
))
1457 /* This case can occur if we saw a PLT32 reloc in an input
1458 file, but the symbol was never referred to by a dynamic
1459 object, or if all references were garbage collected. In
1460 such a case, we don't actually need to build a procedure
1461 linkage table, and we can just do a PC32 reloc instead. */
1462 h
->plt
.offset
= (bfd_vma
) -1;
1469 /* It's possible that we incorrectly decided a .plt reloc was
1470 needed for an R_386_PC32 reloc to a non-function sym in
1471 check_relocs. We can't decide accurately between function and
1472 non-function syms in check-relocs; Objects loaded later in
1473 the link may change h->type. So fix it now. */
1474 h
->plt
.offset
= (bfd_vma
) -1;
1476 /* If this is a weak symbol, and there is a real definition, the
1477 processor independent code will have arranged for us to see the
1478 real definition first, and we can just use the same value. */
1479 if (h
->u
.weakdef
!= NULL
)
1481 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1482 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1483 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1484 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1485 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1486 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1490 /* This is a reference to a symbol defined by a dynamic object which
1491 is not a function. */
1493 /* If we are creating a shared library, we must presume that the
1494 only references to the symbol are via the global offset table.
1495 For such cases we need not do anything here; the relocations will
1496 be handled correctly by relocate_section. */
1500 /* If there are no references to this symbol that do not use the
1501 GOT, we don't need to generate a copy reloc. */
1502 if (!h
->non_got_ref
)
1505 /* If -z nocopyreloc was given, we won't generate them either. */
1506 if (info
->nocopyreloc
)
1512 htab
= elf_i386_hash_table (info
);
1514 /* If there aren't any dynamic relocs in read-only sections, then
1515 we can keep the dynamic relocs and avoid the copy reloc. This
1516 doesn't work on VxWorks, where we can not have dynamic relocations
1517 (other than copy and jump slot relocations) in an executable. */
1518 if (ELIMINATE_COPY_RELOCS
&& !htab
->is_vxworks
)
1520 struct elf_i386_link_hash_entry
* eh
;
1521 struct elf_i386_dyn_relocs
*p
;
1523 eh
= (struct elf_i386_link_hash_entry
*) h
;
1524 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1526 s
= p
->sec
->output_section
;
1527 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1540 (*_bfd_error_handler
) (_("dynamic variable `%s' is zero size"),
1541 h
->root
.root
.string
);
1545 /* We must allocate the symbol in our .dynbss section, which will
1546 become part of the .bss section of the executable. There will be
1547 an entry for this symbol in the .dynsym section. The dynamic
1548 object will contain position independent code, so all references
1549 from the dynamic object to this symbol will go through the global
1550 offset table. The dynamic linker will use the .dynsym entry to
1551 determine the address it must put in the global offset table, so
1552 both the dynamic object and the regular object will refer to the
1553 same memory location for the variable. */
1555 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1556 copy the initial value out of the dynamic object and into the
1557 runtime process image. */
1558 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1560 htab
->srelbss
->size
+= sizeof (Elf32_External_Rel
);
1564 /* We need to figure out the alignment required for this symbol. I
1565 have no idea how ELF linkers handle this. */
1566 power_of_two
= bfd_log2 (h
->size
);
1567 if (power_of_two
> 3)
1570 /* Apply the required alignment. */
1572 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
1573 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1575 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1579 /* Define the symbol as being at this point in the section. */
1580 h
->root
.u
.def
.section
= s
;
1581 h
->root
.u
.def
.value
= s
->size
;
1583 /* Increment the section size to make room for the symbol. */
1589 /* Allocate space in .plt, .got and associated reloc sections for
1593 allocate_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1595 struct bfd_link_info
*info
;
1596 struct elf_i386_link_hash_table
*htab
;
1597 struct elf_i386_link_hash_entry
*eh
;
1598 struct elf_i386_dyn_relocs
*p
;
1600 if (h
->root
.type
== bfd_link_hash_indirect
)
1603 if (h
->root
.type
== bfd_link_hash_warning
)
1604 /* When warning symbols are created, they **replace** the "real"
1605 entry in the hash table, thus we never get to see the real
1606 symbol in a hash traversal. So look at it now. */
1607 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1609 info
= (struct bfd_link_info
*) inf
;
1610 htab
= elf_i386_hash_table (info
);
1612 if (htab
->elf
.dynamic_sections_created
1613 && h
->plt
.refcount
> 0)
1615 /* Make sure this symbol is output as a dynamic symbol.
1616 Undefined weak syms won't yet be marked as dynamic. */
1617 if (h
->dynindx
== -1
1618 && !h
->forced_local
)
1620 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1625 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1627 asection
*s
= htab
->splt
;
1629 /* If this is the first .plt entry, make room for the special
1632 s
->size
+= PLT_ENTRY_SIZE
;
1634 h
->plt
.offset
= s
->size
;
1636 /* If this symbol is not defined in a regular file, and we are
1637 not generating a shared library, then set the symbol to this
1638 location in the .plt. This is required to make function
1639 pointers compare as equal between the normal executable and
1640 the shared library. */
1644 h
->root
.u
.def
.section
= s
;
1645 h
->root
.u
.def
.value
= h
->plt
.offset
;
1648 /* Make room for this entry. */
1649 s
->size
+= PLT_ENTRY_SIZE
;
1651 /* We also need to make an entry in the .got.plt section, which
1652 will be placed in the .got section by the linker script. */
1653 htab
->sgotplt
->size
+= 4;
1655 /* We also need to make an entry in the .rel.plt section. */
1656 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1657 htab
->next_tls_desc_index
++;
1659 if (htab
->is_vxworks
&& !info
->shared
)
1661 /* VxWorks has a second set of relocations for each PLT entry
1662 in executables. They go in a separate relocation section,
1663 which is processed by the kernel loader. */
1665 /* There are two relocations for the initial PLT entry: an
1666 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1667 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1669 if (h
->plt
.offset
== PLT_ENTRY_SIZE
)
1670 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1672 /* There are two extra relocations for each subsequent PLT entry:
1673 an R_386_32 relocation for the GOT entry, and an R_386_32
1674 relocation for the PLT entry. */
1676 htab
->srelplt2
->size
+= (sizeof (Elf32_External_Rel
) * 2);
1681 h
->plt
.offset
= (bfd_vma
) -1;
1687 h
->plt
.offset
= (bfd_vma
) -1;
1691 eh
= (struct elf_i386_link_hash_entry
*) h
;
1692 eh
->tlsdesc_got
= (bfd_vma
) -1;
1694 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
1695 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1696 if (h
->got
.refcount
> 0
1699 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
))
1700 h
->got
.offset
= (bfd_vma
) -1;
1701 else if (h
->got
.refcount
> 0)
1705 int tls_type
= elf_i386_hash_entry(h
)->tls_type
;
1707 /* If we have both R_386_TLS_IE and R_386_TLS_GD, GOT_TLS_IE_BOTH
1709 if ((tls_type
& GOT_TLS_IE_MASK
)
1710 == (GOT_TLS_IE_IE
| GOT_TLS_IE_GD
))
1711 tls_type
= GOT_TLS_IE_BOTH
;
1713 tls_type
&= GOT_TLS_MASK
;
1715 /* Make sure this symbol is output as a dynamic symbol.
1716 Undefined weak syms won't yet be marked as dynamic. */
1717 if (h
->dynindx
== -1
1718 && !h
->forced_local
)
1720 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1725 if (GOT_TLS_GDESC_P (tls_type
))
1727 eh
->tlsdesc_got
= htab
->sgotplt
->size
1728 - elf_i386_compute_jump_table_size (htab
);
1729 htab
->sgotplt
->size
+= 8;
1730 h
->got
.offset
= (bfd_vma
) -2;
1732 if (! GOT_TLS_GDESC_P (tls_type
)
1733 || GOT_TLS_GD_P (tls_type
))
1735 h
->got
.offset
= s
->size
;
1737 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1738 if (GOT_TLS_GD_P (tls_type
) || tls_type
== GOT_TLS_IE_BOTH
)
1741 dyn
= htab
->elf
.dynamic_sections_created
;
1742 /* R_386_TLS_IE_32 needs one dynamic relocation,
1743 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1744 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1745 need two), R_386_TLS_GD needs one if local symbol and two if
1747 if (tls_type
== GOT_TLS_IE_BOTH
)
1748 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1749 else if ((GOT_TLS_GD_P (tls_type
) && h
->dynindx
== -1)
1750 || (tls_type
& GOT_TLS_IE
))
1751 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1752 else if (GOT_TLS_GD_P (tls_type
))
1753 htab
->srelgot
->size
+= 2 * sizeof (Elf32_External_Rel
);
1754 else if (! GOT_TLS_GDESC_P (tls_type
)
1755 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1756 || h
->root
.type
!= bfd_link_hash_undefweak
)
1758 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1759 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
1760 if (GOT_TLS_GDESC_P (tls_type
))
1761 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
1764 h
->got
.offset
= (bfd_vma
) -1;
1766 if (eh
->dyn_relocs
== NULL
)
1769 /* In the shared -Bsymbolic case, discard space allocated for
1770 dynamic pc-relative relocs against symbols which turn out to be
1771 defined in regular objects. For the normal shared case, discard
1772 space for pc-relative relocs that have become local due to symbol
1773 visibility changes. */
1777 /* The only reloc that uses pc_count is R_386_PC32, which will
1778 appear on a call or on something like ".long foo - .". We
1779 want calls to protected symbols to resolve directly to the
1780 function rather than going via the plt. If people want
1781 function pointer comparisons to work as expected then they
1782 should avoid writing assembly like ".long foo - .". */
1783 if (SYMBOL_CALLS_LOCAL (info
, h
))
1785 struct elf_i386_dyn_relocs
**pp
;
1787 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1789 p
->count
-= p
->pc_count
;
1798 /* Also discard relocs on undefined weak syms with non-default
1800 if (eh
->dyn_relocs
!= NULL
1801 && h
->root
.type
== bfd_link_hash_undefweak
)
1803 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1804 eh
->dyn_relocs
= NULL
;
1806 /* Make sure undefined weak symbols are output as a dynamic
1808 else if (h
->dynindx
== -1
1809 && !h
->forced_local
)
1811 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1816 else if (ELIMINATE_COPY_RELOCS
)
1818 /* For the non-shared case, discard space for relocs against
1819 symbols which turn out to need copy relocs or are not
1825 || (htab
->elf
.dynamic_sections_created
1826 && (h
->root
.type
== bfd_link_hash_undefweak
1827 || h
->root
.type
== bfd_link_hash_undefined
))))
1829 /* Make sure this symbol is output as a dynamic symbol.
1830 Undefined weak syms won't yet be marked as dynamic. */
1831 if (h
->dynindx
== -1
1832 && !h
->forced_local
)
1834 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1838 /* If that succeeded, we know we'll be keeping all the
1840 if (h
->dynindx
!= -1)
1844 eh
->dyn_relocs
= NULL
;
1849 /* Finally, allocate space. */
1850 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1852 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1853 sreloc
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1859 /* Find any dynamic relocs that apply to read-only sections. */
1862 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void *inf
)
1864 struct elf_i386_link_hash_entry
*eh
;
1865 struct elf_i386_dyn_relocs
*p
;
1867 if (h
->root
.type
== bfd_link_hash_warning
)
1868 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1870 eh
= (struct elf_i386_link_hash_entry
*) h
;
1871 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1873 asection
*s
= p
->sec
->output_section
;
1875 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1877 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1879 info
->flags
|= DF_TEXTREL
;
1881 /* Not an error, just cut short the traversal. */
1888 /* Set the sizes of the dynamic sections. */
1891 elf_i386_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1892 struct bfd_link_info
*info
)
1894 struct elf_i386_link_hash_table
*htab
;
1900 htab
= elf_i386_hash_table (info
);
1901 dynobj
= htab
->elf
.dynobj
;
1905 if (htab
->elf
.dynamic_sections_created
)
1907 /* Set the contents of the .interp section to the interpreter. */
1908 if (info
->executable
)
1910 s
= bfd_get_section_by_name (dynobj
, ".interp");
1913 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1914 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1918 /* Set up .got offsets for local syms, and space for local dynamic
1920 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1922 bfd_signed_vma
*local_got
;
1923 bfd_signed_vma
*end_local_got
;
1924 char *local_tls_type
;
1925 bfd_vma
*local_tlsdesc_gotent
;
1926 bfd_size_type locsymcount
;
1927 Elf_Internal_Shdr
*symtab_hdr
;
1930 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1933 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1935 struct elf_i386_dyn_relocs
*p
;
1937 for (p
= ((struct elf_i386_dyn_relocs
*)
1938 elf_section_data (s
)->local_dynrel
);
1942 if (!bfd_is_abs_section (p
->sec
)
1943 && bfd_is_abs_section (p
->sec
->output_section
))
1945 /* Input section has been discarded, either because
1946 it is a copy of a linkonce section or due to
1947 linker script /DISCARD/, so we'll be discarding
1950 else if (p
->count
!= 0)
1952 srel
= elf_section_data (p
->sec
)->sreloc
;
1953 srel
->size
+= p
->count
* sizeof (Elf32_External_Rel
);
1954 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1955 info
->flags
|= DF_TEXTREL
;
1960 local_got
= elf_local_got_refcounts (ibfd
);
1964 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
1965 locsymcount
= symtab_hdr
->sh_info
;
1966 end_local_got
= local_got
+ locsymcount
;
1967 local_tls_type
= elf_i386_local_got_tls_type (ibfd
);
1968 local_tlsdesc_gotent
= elf_i386_local_tlsdesc_gotent (ibfd
);
1970 srel
= htab
->srelgot
;
1971 for (; local_got
< end_local_got
;
1972 ++local_got
, ++local_tls_type
, ++local_tlsdesc_gotent
)
1974 *local_tlsdesc_gotent
= (bfd_vma
) -1;
1977 if (GOT_TLS_GDESC_P (*local_tls_type
))
1979 *local_tlsdesc_gotent
= htab
->sgotplt
->size
1980 - elf_i386_compute_jump_table_size (htab
);
1981 htab
->sgotplt
->size
+= 8;
1982 *local_got
= (bfd_vma
) -2;
1984 if (! GOT_TLS_GDESC_P (*local_tls_type
)
1985 || GOT_TLS_GD_P (*local_tls_type
))
1987 *local_got
= s
->size
;
1989 if (GOT_TLS_GD_P (*local_tls_type
)
1990 || *local_tls_type
== GOT_TLS_IE_BOTH
)
1994 || GOT_TLS_GD_ANY_P (*local_tls_type
)
1995 || (*local_tls_type
& GOT_TLS_IE
))
1997 if (*local_tls_type
== GOT_TLS_IE_BOTH
)
1998 srel
->size
+= 2 * sizeof (Elf32_External_Rel
);
1999 else if (GOT_TLS_GD_P (*local_tls_type
)
2000 || ! GOT_TLS_GDESC_P (*local_tls_type
))
2001 srel
->size
+= sizeof (Elf32_External_Rel
);
2002 if (GOT_TLS_GDESC_P (*local_tls_type
))
2003 htab
->srelplt
->size
+= sizeof (Elf32_External_Rel
);
2007 *local_got
= (bfd_vma
) -1;
2011 if (htab
->tls_ldm_got
.refcount
> 0)
2013 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2015 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2016 htab
->sgot
->size
+= 8;
2017 htab
->srelgot
->size
+= sizeof (Elf32_External_Rel
);
2020 htab
->tls_ldm_got
.offset
= -1;
2022 /* Allocate global sym .plt and .got entries, and space for global
2023 sym dynamic relocs. */
2024 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
2026 /* For every jump slot reserved in the sgotplt, reloc_count is
2027 incremented. However, when we reserve space for TLS descriptors,
2028 it's not incremented, so in order to compute the space reserved
2029 for them, it suffices to multiply the reloc count by the jump
2032 htab
->sgotplt_jump_table_size
= htab
->next_tls_desc_index
* 4;
2034 /* We now have determined the sizes of the various dynamic sections.
2035 Allocate memory for them. */
2037 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2039 bfd_boolean strip_section
= TRUE
;
2041 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2046 || s
== htab
->sgotplt
2047 || s
== htab
->sdynbss
)
2049 /* Strip this section if we don't need it; see the
2051 /* We'd like to strip these sections if they aren't needed, but if
2052 we've exported dynamic symbols from them we must leave them.
2053 It's too late to tell BFD to get rid of the symbols. */
2055 if (htab
->elf
.hplt
!= NULL
)
2056 strip_section
= FALSE
;
2058 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rel", 4) == 0)
2060 if (s
->size
!= 0 && s
!= htab
->srelplt
&& s
!= htab
->srelplt2
)
2063 /* We use the reloc_count field as a counter if we need
2064 to copy relocs into the output file. */
2069 /* It's not one of our sections, so don't allocate space. */
2075 /* If we don't need this section, strip it from the
2076 output file. This is mostly to handle .rel.bss and
2077 .rel.plt. We must create both sections in
2078 create_dynamic_sections, because they must be created
2079 before the linker maps input sections to output
2080 sections. The linker does that before
2081 adjust_dynamic_symbol is called, and it is that
2082 function which decides whether anything needs to go
2083 into these sections. */
2085 s
->flags
|= SEC_EXCLUDE
;
2089 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2092 /* Allocate memory for the section contents. We use bfd_zalloc
2093 here in case unused entries are not reclaimed before the
2094 section's contents are written out. This should not happen,
2095 but this way if it does, we get a R_386_NONE reloc instead
2097 s
->contents
= bfd_zalloc (dynobj
, s
->size
);
2098 if (s
->contents
== NULL
)
2102 if (htab
->elf
.dynamic_sections_created
)
2104 /* Add some entries to the .dynamic section. We fill in the
2105 values later, in elf_i386_finish_dynamic_sections, but we
2106 must add the entries now so that we get the correct size for
2107 the .dynamic section. The DT_DEBUG entry is filled in by the
2108 dynamic linker and used by the debugger. */
2109 #define add_dynamic_entry(TAG, VAL) \
2110 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2112 if (info
->executable
)
2114 if (!add_dynamic_entry (DT_DEBUG
, 0))
2118 if (htab
->splt
->size
!= 0)
2120 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2121 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2122 || !add_dynamic_entry (DT_PLTREL
, DT_REL
)
2123 || !add_dynamic_entry (DT_JMPREL
, 0))
2129 if (!add_dynamic_entry (DT_REL
, 0)
2130 || !add_dynamic_entry (DT_RELSZ
, 0)
2131 || !add_dynamic_entry (DT_RELENT
, sizeof (Elf32_External_Rel
)))
2134 /* If any dynamic relocs apply to a read-only section,
2135 then we need a DT_TEXTREL entry. */
2136 if ((info
->flags
& DF_TEXTREL
) == 0)
2137 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2140 if ((info
->flags
& DF_TEXTREL
) != 0)
2142 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2147 #undef add_dynamic_entry
2153 elf_i386_always_size_sections (bfd
*output_bfd
,
2154 struct bfd_link_info
*info
)
2156 asection
*tls_sec
= elf_hash_table (info
)->tls_sec
;
2160 struct elf_link_hash_entry
*tlsbase
;
2162 tlsbase
= elf_link_hash_lookup (elf_hash_table (info
),
2163 "_TLS_MODULE_BASE_",
2164 FALSE
, FALSE
, FALSE
);
2166 if (tlsbase
&& tlsbase
->type
== STT_TLS
)
2168 struct bfd_link_hash_entry
*bh
= NULL
;
2169 const struct elf_backend_data
*bed
2170 = get_elf_backend_data (output_bfd
);
2172 if (!(_bfd_generic_link_add_one_symbol
2173 (info
, output_bfd
, "_TLS_MODULE_BASE_", BSF_LOCAL
,
2174 tls_sec
, 0, NULL
, FALSE
,
2175 bed
->collect
, &bh
)))
2177 tlsbase
= (struct elf_link_hash_entry
*)bh
;
2178 tlsbase
->def_regular
= 1;
2179 tlsbase
->other
= STV_HIDDEN
;
2180 (*bed
->elf_backend_hide_symbol
) (info
, tlsbase
, TRUE
);
2187 /* Set the correct type for an x86 ELF section. We do this by the
2188 section name, which is a hack, but ought to work. */
2191 elf_i386_fake_sections (bfd
*abfd ATTRIBUTE_UNUSED
,
2192 Elf_Internal_Shdr
*hdr
,
2195 register const char *name
;
2197 name
= bfd_get_section_name (abfd
, sec
);
2199 /* This is an ugly, but unfortunately necessary hack that is
2200 needed when producing EFI binaries on x86. It tells
2201 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2202 containing ELF relocation info. We need this hack in order to
2203 be able to generate ELF binaries that can be translated into
2204 EFI applications (which are essentially COFF objects). Those
2205 files contain a COFF ".reloc" section inside an ELFNN object,
2206 which would normally cause BFD to segfault because it would
2207 attempt to interpret this section as containing relocation
2208 entries for section "oc". With this hack enabled, ".reloc"
2209 will be treated as a normal data section, which will avoid the
2210 segfault. However, you won't be able to create an ELFNN binary
2211 with a section named "oc" that needs relocations, but that's
2212 the kind of ugly side-effects you get when detecting section
2213 types based on their names... In practice, this limitation is
2214 unlikely to bite. */
2215 if (strcmp (name
, ".reloc") == 0)
2216 hdr
->sh_type
= SHT_PROGBITS
;
2221 /* Return the base VMA address which should be subtracted from real addresses
2222 when resolving @dtpoff relocation.
2223 This is PT_TLS segment p_vaddr. */
2226 dtpoff_base (struct bfd_link_info
*info
)
2228 /* If tls_sec is NULL, we should have signalled an error already. */
2229 if (elf_hash_table (info
)->tls_sec
== NULL
)
2231 return elf_hash_table (info
)->tls_sec
->vma
;
2234 /* Return the relocation value for @tpoff relocation
2235 if STT_TLS virtual address is ADDRESS. */
2238 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2240 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2242 /* If tls_sec is NULL, we should have signalled an error already. */
2243 if (htab
->tls_sec
== NULL
)
2245 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2248 /* Relocate an i386 ELF section. */
2251 elf_i386_relocate_section (bfd
*output_bfd
,
2252 struct bfd_link_info
*info
,
2254 asection
*input_section
,
2256 Elf_Internal_Rela
*relocs
,
2257 Elf_Internal_Sym
*local_syms
,
2258 asection
**local_sections
)
2260 struct elf_i386_link_hash_table
*htab
;
2261 Elf_Internal_Shdr
*symtab_hdr
;
2262 struct elf_link_hash_entry
**sym_hashes
;
2263 bfd_vma
*local_got_offsets
;
2264 bfd_vma
*local_tlsdesc_gotents
;
2265 Elf_Internal_Rela
*rel
;
2266 Elf_Internal_Rela
*relend
;
2268 htab
= elf_i386_hash_table (info
);
2269 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2270 sym_hashes
= elf_sym_hashes (input_bfd
);
2271 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2272 local_tlsdesc_gotents
= elf_i386_local_tlsdesc_gotent (input_bfd
);
2275 relend
= relocs
+ input_section
->reloc_count
;
2276 for (; rel
< relend
; rel
++)
2278 unsigned int r_type
;
2279 reloc_howto_type
*howto
;
2280 unsigned long r_symndx
;
2281 struct elf_link_hash_entry
*h
;
2282 Elf_Internal_Sym
*sym
;
2284 bfd_vma off
, offplt
;
2286 bfd_boolean unresolved_reloc
;
2287 bfd_reloc_status_type r
;
2291 r_type
= ELF32_R_TYPE (rel
->r_info
);
2292 if (r_type
== R_386_GNU_VTINHERIT
2293 || r_type
== R_386_GNU_VTENTRY
)
2296 if ((indx
= r_type
) >= R_386_standard
2297 && ((indx
= r_type
- R_386_ext_offset
) - R_386_standard
2298 >= R_386_ext
- R_386_standard
)
2299 && ((indx
= r_type
- R_386_tls_offset
) - R_386_ext
2300 >= R_386_tls
- R_386_ext
))
2302 (*_bfd_error_handler
)
2303 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2304 input_bfd
, input_section
, r_type
);
2305 bfd_set_error (bfd_error_bad_value
);
2308 howto
= elf_howto_table
+ indx
;
2310 r_symndx
= ELF32_R_SYM (rel
->r_info
);
2312 if (info
->relocatable
)
2317 /* This is a relocatable link. We don't have to change
2318 anything, unless the reloc is against a section symbol,
2319 in which case we have to adjust according to where the
2320 section symbol winds up in the output section. */
2321 if (r_symndx
>= symtab_hdr
->sh_info
)
2324 sym
= local_syms
+ r_symndx
;
2325 if (ELF_ST_TYPE (sym
->st_info
) != STT_SECTION
)
2328 sec
= local_sections
[r_symndx
];
2329 val
= sec
->output_offset
;
2333 where
= contents
+ rel
->r_offset
;
2334 switch (howto
->size
)
2336 /* FIXME: overflow checks. */
2338 val
+= bfd_get_8 (input_bfd
, where
);
2339 bfd_put_8 (input_bfd
, val
, where
);
2342 val
+= bfd_get_16 (input_bfd
, where
);
2343 bfd_put_16 (input_bfd
, val
, where
);
2346 val
+= bfd_get_32 (input_bfd
, where
);
2347 bfd_put_32 (input_bfd
, val
, where
);
2355 /* This is a final link. */
2359 unresolved_reloc
= FALSE
;
2360 if (r_symndx
< symtab_hdr
->sh_info
)
2362 sym
= local_syms
+ r_symndx
;
2363 sec
= local_sections
[r_symndx
];
2364 relocation
= (sec
->output_section
->vma
2365 + sec
->output_offset
2367 if ((sec
->flags
& SEC_MERGE
)
2368 && ELF_ST_TYPE (sym
->st_info
) == STT_SECTION
)
2372 bfd_byte
*where
= contents
+ rel
->r_offset
;
2374 switch (howto
->size
)
2377 addend
= bfd_get_8 (input_bfd
, where
);
2378 if (howto
->pc_relative
)
2380 addend
= (addend
^ 0x80) - 0x80;
2385 addend
= bfd_get_16 (input_bfd
, where
);
2386 if (howto
->pc_relative
)
2388 addend
= (addend
^ 0x8000) - 0x8000;
2393 addend
= bfd_get_32 (input_bfd
, where
);
2394 if (howto
->pc_relative
)
2396 addend
= (addend
^ 0x80000000) - 0x80000000;
2405 addend
= _bfd_elf_rel_local_sym (output_bfd
, sym
, &msec
, addend
);
2406 addend
-= relocation
;
2407 addend
+= msec
->output_section
->vma
+ msec
->output_offset
;
2409 switch (howto
->size
)
2412 /* FIXME: overflow checks. */
2413 if (howto
->pc_relative
)
2415 bfd_put_8 (input_bfd
, addend
, where
);
2418 if (howto
->pc_relative
)
2420 bfd_put_16 (input_bfd
, addend
, where
);
2423 if (howto
->pc_relative
)
2425 bfd_put_32 (input_bfd
, addend
, where
);
2434 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2435 r_symndx
, symtab_hdr
, sym_hashes
,
2437 unresolved_reloc
, warned
);
2442 /* r_symndx will be zero only for relocs against symbols from
2443 removed linkonce sections, or sections discarded by a linker
2444 script. For these relocs, we just want the section contents
2445 zeroed. Avoid any special processing in the switch below. */
2446 r_type
= R_386_NONE
;
2449 if (howto
->pc_relative
)
2450 relocation
= (input_section
->output_section
->vma
2451 + input_section
->output_offset
2458 /* Relocation is to the entry for this symbol in the global
2460 if (htab
->sgot
== NULL
)
2467 off
= h
->got
.offset
;
2468 dyn
= htab
->elf
.dynamic_sections_created
;
2469 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2471 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2472 || (ELF_ST_VISIBILITY (h
->other
)
2473 && h
->root
.type
== bfd_link_hash_undefweak
))
2475 /* This is actually a static link, or it is a
2476 -Bsymbolic link and the symbol is defined
2477 locally, or the symbol was forced to be local
2478 because of a version file. We must initialize
2479 this entry in the global offset table. Since the
2480 offset must always be a multiple of 4, we use the
2481 least significant bit to record whether we have
2482 initialized it already.
2484 When doing a dynamic link, we create a .rel.got
2485 relocation entry to initialize the value. This
2486 is done in the finish_dynamic_symbol routine. */
2491 bfd_put_32 (output_bfd
, relocation
,
2492 htab
->sgot
->contents
+ off
);
2497 unresolved_reloc
= FALSE
;
2501 if (local_got_offsets
== NULL
)
2504 off
= local_got_offsets
[r_symndx
];
2506 /* The offset must always be a multiple of 4. We use
2507 the least significant bit to record whether we have
2508 already generated the necessary reloc. */
2513 bfd_put_32 (output_bfd
, relocation
,
2514 htab
->sgot
->contents
+ off
);
2519 Elf_Internal_Rela outrel
;
2526 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2527 + htab
->sgot
->output_offset
2529 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2531 loc
+= s
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2532 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2535 local_got_offsets
[r_symndx
] |= 1;
2539 if (off
>= (bfd_vma
) -2)
2542 relocation
= htab
->sgot
->output_section
->vma
2543 + htab
->sgot
->output_offset
+ off
2544 - htab
->sgotplt
->output_section
->vma
2545 - htab
->sgotplt
->output_offset
;
2549 /* Relocation is relative to the start of the global offset
2552 /* Check to make sure it isn't a protected function symbol
2553 for shared library since it may not be local when used
2554 as function address. */
2556 && !info
->executable
2559 && h
->type
== STT_FUNC
2560 && ELF_ST_VISIBILITY (h
->other
) == STV_PROTECTED
)
2562 (*_bfd_error_handler
)
2563 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2564 input_bfd
, h
->root
.root
.string
);
2565 bfd_set_error (bfd_error_bad_value
);
2569 /* Note that sgot is not involved in this
2570 calculation. We always want the start of .got.plt. If we
2571 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
2572 permitted by the ABI, we might have to change this
2574 relocation
-= htab
->sgotplt
->output_section
->vma
2575 + htab
->sgotplt
->output_offset
;
2579 /* Use global offset table as symbol value. */
2580 relocation
= htab
->sgotplt
->output_section
->vma
2581 + htab
->sgotplt
->output_offset
;
2582 unresolved_reloc
= FALSE
;
2586 /* Relocation is to the entry for this symbol in the
2587 procedure linkage table. */
2589 /* Resolve a PLT32 reloc against a local symbol directly,
2590 without using the procedure linkage table. */
2594 if (h
->plt
.offset
== (bfd_vma
) -1
2595 || htab
->splt
== NULL
)
2597 /* We didn't make a PLT entry for this symbol. This
2598 happens when statically linking PIC code, or when
2599 using -Bsymbolic. */
2603 relocation
= (htab
->splt
->output_section
->vma
2604 + htab
->splt
->output_offset
2606 unresolved_reloc
= FALSE
;
2611 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2616 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2617 || h
->root
.type
!= bfd_link_hash_undefweak
)
2618 && (r_type
!= R_386_PC32
2619 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2620 || (ELIMINATE_COPY_RELOCS
2627 || h
->root
.type
== bfd_link_hash_undefweak
2628 || h
->root
.type
== bfd_link_hash_undefined
)))
2630 Elf_Internal_Rela outrel
;
2632 bfd_boolean skip
, relocate
;
2635 /* When generating a shared object, these relocations
2636 are copied into the output file to be resolved at run
2643 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2645 if (outrel
.r_offset
== (bfd_vma
) -1)
2647 else if (outrel
.r_offset
== (bfd_vma
) -2)
2648 skip
= TRUE
, relocate
= TRUE
;
2649 outrel
.r_offset
+= (input_section
->output_section
->vma
2650 + input_section
->output_offset
);
2653 memset (&outrel
, 0, sizeof outrel
);
2656 && (r_type
== R_386_PC32
2659 || !h
->def_regular
))
2660 outrel
.r_info
= ELF32_R_INFO (h
->dynindx
, r_type
);
2663 /* This symbol is local, or marked to become local. */
2665 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2668 sreloc
= elf_section_data (input_section
)->sreloc
;
2672 loc
= sreloc
->contents
;
2673 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2674 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2676 /* If this reloc is against an external symbol, we do
2677 not want to fiddle with the addend. Otherwise, we
2678 need to include the symbol value so that it becomes
2679 an addend for the dynamic reloc. */
2688 Elf_Internal_Rela outrel
;
2692 outrel
.r_offset
= rel
->r_offset
2693 + input_section
->output_section
->vma
2694 + input_section
->output_offset
;
2695 outrel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
2696 sreloc
= elf_section_data (input_section
)->sreloc
;
2699 loc
= sreloc
->contents
;
2700 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
2701 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
2706 case R_386_TLS_GOTDESC
:
2707 case R_386_TLS_DESC_CALL
:
2708 case R_386_TLS_IE_32
:
2709 case R_386_TLS_GOTIE
:
2710 r_type
= elf_i386_tls_transition (info
, r_type
, h
== NULL
);
2711 tls_type
= GOT_UNKNOWN
;
2712 if (h
== NULL
&& local_got_offsets
)
2713 tls_type
= elf_i386_local_got_tls_type (input_bfd
) [r_symndx
];
2716 tls_type
= elf_i386_hash_entry(h
)->tls_type
;
2717 /* If we have both R_386_TLS_IE and R_386_TLS_GD,
2718 GOT_TLS_IE_BOTH should be used. */
2719 if ((tls_type
& GOT_TLS_IE_MASK
)
2720 == (GOT_TLS_IE_IE
| GOT_TLS_IE_GD
))
2721 tls_type
= GOT_TLS_IE_BOTH
;
2723 tls_type
&= GOT_TLS_MASK
;
2724 if (!info
->shared
&& h
->dynindx
== -1 && (tls_type
& GOT_TLS_IE
))
2725 r_type
= R_386_TLS_LE_32
;
2727 if (tls_type
== GOT_TLS_IE
)
2728 tls_type
= GOT_TLS_IE_NEG
;
2729 if (r_type
== R_386_TLS_GD
2730 || r_type
== R_386_TLS_GOTDESC
2731 || r_type
== R_386_TLS_DESC_CALL
)
2733 if (tls_type
== GOT_TLS_IE_POS
)
2734 r_type
= R_386_TLS_GOTIE
;
2735 else if (tls_type
& GOT_TLS_IE
)
2736 r_type
= R_386_TLS_IE_32
;
2739 if (r_type
== R_386_TLS_LE_32
)
2741 BFD_ASSERT (! unresolved_reloc
);
2742 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
2744 unsigned int val
, type
;
2747 /* GD->LE transition. */
2748 BFD_ASSERT (rel
->r_offset
>= 2);
2749 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2750 BFD_ASSERT (type
== 0x8d || type
== 0x04);
2751 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
2752 BFD_ASSERT (bfd_get_8 (input_bfd
,
2753 contents
+ rel
->r_offset
+ 4)
2755 BFD_ASSERT (rel
+ 1 < relend
);
2756 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
2757 roff
= rel
->r_offset
+ 5;
2758 val
= bfd_get_8 (input_bfd
,
2759 contents
+ rel
->r_offset
- 1);
2762 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2764 movl %gs:0, %eax; subl $foo@tpoff, %eax
2765 (6 byte form of subl). */
2766 BFD_ASSERT (rel
->r_offset
>= 3);
2767 BFD_ASSERT (bfd_get_8 (input_bfd
,
2768 contents
+ rel
->r_offset
- 3)
2770 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
2771 memcpy (contents
+ rel
->r_offset
- 3,
2772 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2776 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
2777 if (rel
->r_offset
+ 10 <= input_section
->size
2778 && bfd_get_8 (input_bfd
,
2779 contents
+ rel
->r_offset
+ 9) == 0x90)
2781 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2783 movl %gs:0, %eax; subl $foo@tpoff, %eax
2784 (6 byte form of subl). */
2785 memcpy (contents
+ rel
->r_offset
- 2,
2786 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2787 roff
= rel
->r_offset
+ 6;
2791 /* leal foo(%reg), %eax; call ___tls_get_addr
2793 movl %gs:0, %eax; subl $foo@tpoff, %eax
2794 (5 byte form of subl). */
2795 memcpy (contents
+ rel
->r_offset
- 2,
2796 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2799 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2801 /* Skip R_386_PLT32. */
2805 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
2807 /* GDesc -> LE transition.
2808 It's originally something like:
2809 leal x@tlsdesc(%ebx), %eax
2813 Registers other than %eax may be set up here. */
2815 unsigned int val
, type
;
2818 /* First, make sure it's a leal adding ebx to a
2819 32-bit offset into any register, although it's
2820 probably almost always going to be eax. */
2821 roff
= rel
->r_offset
;
2822 BFD_ASSERT (roff
>= 2);
2823 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
2824 BFD_ASSERT (type
== 0x8d);
2825 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
2826 BFD_ASSERT ((val
& 0xc7) == 0x83);
2827 BFD_ASSERT (roff
+ 4 <= input_section
->size
);
2829 /* Now modify the instruction as appropriate. */
2830 /* aoliva FIXME: remove the above and xor the byte
2832 bfd_put_8 (output_bfd
, val
^ 0x86,
2833 contents
+ roff
- 1);
2834 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2838 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
2840 /* GDesc -> LE transition.
2846 unsigned int val
, type
;
2849 /* First, make sure it's a call *(%eax). */
2850 roff
= rel
->r_offset
;
2851 BFD_ASSERT (roff
+ 2 <= input_section
->size
);
2852 type
= bfd_get_8 (input_bfd
, contents
+ roff
);
2853 BFD_ASSERT (type
== 0xff);
2854 val
= bfd_get_8 (input_bfd
, contents
+ roff
+ 1);
2855 BFD_ASSERT (val
== 0x10);
2857 /* Now modify the instruction as appropriate. */
2858 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
);
2859 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
2862 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_IE
)
2864 unsigned int val
, type
;
2866 /* IE->LE transition:
2867 Originally it can be one of:
2875 BFD_ASSERT (rel
->r_offset
>= 1);
2876 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2877 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2880 /* movl foo, %eax. */
2881 bfd_put_8 (output_bfd
, 0xb8,
2882 contents
+ rel
->r_offset
- 1);
2886 BFD_ASSERT (rel
->r_offset
>= 2);
2887 type
= bfd_get_8 (input_bfd
,
2888 contents
+ rel
->r_offset
- 2);
2893 BFD_ASSERT ((val
& 0xc7) == 0x05);
2894 bfd_put_8 (output_bfd
, 0xc7,
2895 contents
+ rel
->r_offset
- 2);
2896 bfd_put_8 (output_bfd
,
2897 0xc0 | ((val
>> 3) & 7),
2898 contents
+ rel
->r_offset
- 1);
2902 BFD_ASSERT ((val
& 0xc7) == 0x05);
2903 bfd_put_8 (output_bfd
, 0x81,
2904 contents
+ rel
->r_offset
- 2);
2905 bfd_put_8 (output_bfd
,
2906 0xc0 | ((val
>> 3) & 7),
2907 contents
+ rel
->r_offset
- 1);
2914 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2915 contents
+ rel
->r_offset
);
2920 unsigned int val
, type
;
2922 /* {IE_32,GOTIE}->LE transition:
2923 Originally it can be one of:
2924 subl foo(%reg1), %reg2
2925 movl foo(%reg1), %reg2
2926 addl foo(%reg1), %reg2
2929 movl $foo, %reg2 (6 byte form)
2930 addl $foo, %reg2. */
2931 BFD_ASSERT (rel
->r_offset
>= 2);
2932 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
2933 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
2934 BFD_ASSERT (rel
->r_offset
+ 4 <= input_section
->size
);
2935 BFD_ASSERT ((val
& 0xc0) == 0x80 && (val
& 7) != 4);
2939 bfd_put_8 (output_bfd
, 0xc7,
2940 contents
+ rel
->r_offset
- 2);
2941 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2942 contents
+ rel
->r_offset
- 1);
2944 else if (type
== 0x2b)
2947 bfd_put_8 (output_bfd
, 0x81,
2948 contents
+ rel
->r_offset
- 2);
2949 bfd_put_8 (output_bfd
, 0xe8 | ((val
>> 3) & 7),
2950 contents
+ rel
->r_offset
- 1);
2952 else if (type
== 0x03)
2955 bfd_put_8 (output_bfd
, 0x81,
2956 contents
+ rel
->r_offset
- 2);
2957 bfd_put_8 (output_bfd
, 0xc0 | ((val
>> 3) & 7),
2958 contents
+ rel
->r_offset
- 1);
2962 if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTIE
)
2963 bfd_put_32 (output_bfd
, -tpoff (info
, relocation
),
2964 contents
+ rel
->r_offset
);
2966 bfd_put_32 (output_bfd
, tpoff (info
, relocation
),
2967 contents
+ rel
->r_offset
);
2972 if (htab
->sgot
== NULL
)
2977 off
= h
->got
.offset
;
2978 offplt
= elf_i386_hash_entry (h
)->tlsdesc_got
;
2982 if (local_got_offsets
== NULL
)
2985 off
= local_got_offsets
[r_symndx
];
2986 offplt
= local_tlsdesc_gotents
[r_symndx
];
2993 Elf_Internal_Rela outrel
;
2998 if (htab
->srelgot
== NULL
)
3001 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3003 if (GOT_TLS_GDESC_P (tls_type
))
3005 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_DESC
);
3006 BFD_ASSERT (htab
->sgotplt_jump_table_size
+ offplt
+ 8
3007 <= htab
->sgotplt
->size
);
3008 outrel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3009 + htab
->sgotplt
->output_offset
3011 + htab
->sgotplt_jump_table_size
);
3012 sreloc
= htab
->srelplt
;
3013 loc
= sreloc
->contents
;
3014 loc
+= (htab
->next_tls_desc_index
++
3015 * sizeof (Elf32_External_Rel
));
3016 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3017 <= sreloc
->contents
+ sreloc
->size
);
3018 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3021 BFD_ASSERT (! unresolved_reloc
);
3022 bfd_put_32 (output_bfd
,
3023 relocation
- dtpoff_base (info
),
3024 htab
->sgotplt
->contents
+ offplt
3025 + htab
->sgotplt_jump_table_size
+ 4);
3029 bfd_put_32 (output_bfd
, 0,
3030 htab
->sgotplt
->contents
+ offplt
3031 + htab
->sgotplt_jump_table_size
+ 4);
3035 sreloc
= htab
->srelgot
;
3037 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3038 + htab
->sgot
->output_offset
+ off
);
3040 if (GOT_TLS_GD_P (tls_type
))
3041 dr_type
= R_386_TLS_DTPMOD32
;
3042 else if (GOT_TLS_GDESC_P (tls_type
))
3044 else if (tls_type
== GOT_TLS_IE_POS
)
3045 dr_type
= R_386_TLS_TPOFF
;
3047 dr_type
= R_386_TLS_TPOFF32
;
3049 if (dr_type
== R_386_TLS_TPOFF
&& indx
== 0)
3050 bfd_put_32 (output_bfd
, relocation
- dtpoff_base (info
),
3051 htab
->sgot
->contents
+ off
);
3052 else if (dr_type
== R_386_TLS_TPOFF32
&& indx
== 0)
3053 bfd_put_32 (output_bfd
, dtpoff_base (info
) - relocation
,
3054 htab
->sgot
->contents
+ off
);
3055 else if (dr_type
!= R_386_TLS_DESC
)
3056 bfd_put_32 (output_bfd
, 0,
3057 htab
->sgot
->contents
+ off
);
3058 outrel
.r_info
= ELF32_R_INFO (indx
, dr_type
);
3060 loc
= sreloc
->contents
;
3061 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3062 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3063 <= sreloc
->contents
+ sreloc
->size
);
3064 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3066 if (GOT_TLS_GD_P (tls_type
))
3070 BFD_ASSERT (! unresolved_reloc
);
3071 bfd_put_32 (output_bfd
,
3072 relocation
- dtpoff_base (info
),
3073 htab
->sgot
->contents
+ off
+ 4);
3077 bfd_put_32 (output_bfd
, 0,
3078 htab
->sgot
->contents
+ off
+ 4);
3079 outrel
.r_info
= ELF32_R_INFO (indx
,
3080 R_386_TLS_DTPOFF32
);
3081 outrel
.r_offset
+= 4;
3082 sreloc
->reloc_count
++;
3083 loc
+= sizeof (Elf32_External_Rel
);
3084 BFD_ASSERT (loc
+ sizeof (Elf32_External_Rel
)
3085 <= sreloc
->contents
+ sreloc
->size
);
3086 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3089 else if (tls_type
== GOT_TLS_IE_BOTH
)
3091 bfd_put_32 (output_bfd
,
3092 indx
== 0 ? relocation
- dtpoff_base (info
) : 0,
3093 htab
->sgot
->contents
+ off
+ 4);
3094 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3095 outrel
.r_offset
+= 4;
3096 sreloc
->reloc_count
++;
3097 loc
+= sizeof (Elf32_External_Rel
);
3098 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3105 local_got_offsets
[r_symndx
] |= 1;
3108 if (off
>= (bfd_vma
) -2
3109 && ! GOT_TLS_GDESC_P (tls_type
))
3111 if (r_type
== R_386_TLS_GOTDESC
3112 || r_type
== R_386_TLS_DESC_CALL
)
3114 relocation
= htab
->sgotplt_jump_table_size
+ offplt
;
3115 unresolved_reloc
= FALSE
;
3117 else if (r_type
== ELF32_R_TYPE (rel
->r_info
))
3119 bfd_vma g_o_t
= htab
->sgotplt
->output_section
->vma
3120 + htab
->sgotplt
->output_offset
;
3121 relocation
= htab
->sgot
->output_section
->vma
3122 + htab
->sgot
->output_offset
+ off
- g_o_t
;
3123 if ((r_type
== R_386_TLS_IE
|| r_type
== R_386_TLS_GOTIE
)
3124 && tls_type
== GOT_TLS_IE_BOTH
)
3126 if (r_type
== R_386_TLS_IE
)
3127 relocation
+= g_o_t
;
3128 unresolved_reloc
= FALSE
;
3130 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GD
)
3132 unsigned int val
, type
;
3135 /* GD->IE transition. */
3136 BFD_ASSERT (rel
->r_offset
>= 2);
3137 type
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2);
3138 BFD_ASSERT (type
== 0x8d || type
== 0x04);
3139 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
3140 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
3142 BFD_ASSERT (rel
+ 1 < relend
);
3143 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
3144 roff
= rel
->r_offset
- 3;
3145 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3148 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3150 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3151 BFD_ASSERT (rel
->r_offset
>= 3);
3152 BFD_ASSERT (bfd_get_8 (input_bfd
,
3153 contents
+ rel
->r_offset
- 3)
3155 BFD_ASSERT ((val
& 0xc7) == 0x05 && val
!= (4 << 3));
3160 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3162 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3163 BFD_ASSERT (rel
->r_offset
+ 10 <= input_section
->size
);
3164 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
3165 BFD_ASSERT (bfd_get_8 (input_bfd
,
3166 contents
+ rel
->r_offset
+ 9)
3168 roff
= rel
->r_offset
- 2;
3170 memcpy (contents
+ roff
,
3171 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3172 contents
[roff
+ 7] = 0x80 | (val
& 7);
3173 /* If foo is used only with foo@gotntpoff(%reg) and
3174 foo@indntpoff, but not with foo@gottpoff(%reg), change
3175 subl $foo@gottpoff(%reg), %eax
3177 addl $foo@gotntpoff(%reg), %eax. */
3178 if (r_type
== R_386_TLS_GOTIE
)
3180 contents
[roff
+ 6] = 0x03;
3181 if (tls_type
== GOT_TLS_IE_BOTH
)
3184 bfd_put_32 (output_bfd
,
3185 htab
->sgot
->output_section
->vma
3186 + htab
->sgot
->output_offset
+ off
3187 - htab
->sgotplt
->output_section
->vma
3188 - htab
->sgotplt
->output_offset
,
3189 contents
+ roff
+ 8);
3190 /* Skip R_386_PLT32. */
3194 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_GOTDESC
)
3196 /* GDesc -> IE transition.
3197 It's originally something like:
3198 leal x@tlsdesc(%ebx), %eax
3201 movl x@gotntpoff(%ebx), %eax # before nop; nop
3203 movl x@gottpoff(%ebx), %eax # before negl %eax
3205 Registers other than %eax may be set up here. */
3207 unsigned int val
, type
;
3210 /* First, make sure it's a leal adding ebx to a 32-bit
3211 offset into any register, although it's probably
3212 almost always going to be eax. */
3213 roff
= rel
->r_offset
;
3214 BFD_ASSERT (roff
>= 2);
3215 type
= bfd_get_8 (input_bfd
, contents
+ roff
- 2);
3216 BFD_ASSERT (type
== 0x8d);
3217 val
= bfd_get_8 (input_bfd
, contents
+ roff
- 1);
3218 BFD_ASSERT ((val
& 0xc7) == 0x83);
3219 BFD_ASSERT (roff
+ 4 <= input_section
->size
);
3221 /* Now modify the instruction as appropriate. */
3222 /* To turn a leal into a movl in the form we use it, it
3223 suffices to change the first byte from 0x8d to 0x8b.
3224 aoliva FIXME: should we decide to keep the leal, all
3225 we have to do is remove the statement below, and
3226 adjust the relaxation of R_386_TLS_DESC_CALL. */
3227 bfd_put_8 (output_bfd
, 0x8b, contents
+ roff
- 2);
3229 if (tls_type
== GOT_TLS_IE_BOTH
)
3232 bfd_put_32 (output_bfd
,
3233 htab
->sgot
->output_section
->vma
3234 + htab
->sgot
->output_offset
+ off
3235 - htab
->sgotplt
->output_section
->vma
3236 - htab
->sgotplt
->output_offset
,
3240 else if (ELF32_R_TYPE (rel
->r_info
) == R_386_TLS_DESC_CALL
)
3242 /* GDesc -> IE transition.
3250 depending on how we transformed the TLS_GOTDESC above.
3253 unsigned int val
, type
;
3256 /* First, make sure it's a call *(%eax). */
3257 roff
= rel
->r_offset
;
3258 BFD_ASSERT (roff
+ 2 <= input_section
->size
);
3259 type
= bfd_get_8 (input_bfd
, contents
+ roff
);
3260 BFD_ASSERT (type
== 0xff);
3261 val
= bfd_get_8 (input_bfd
, contents
+ roff
+ 1);
3262 BFD_ASSERT (val
== 0x10);
3264 /* Now modify the instruction as appropriate. */
3265 if (tls_type
!= GOT_TLS_IE_NEG
)
3268 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
);
3269 bfd_put_8 (output_bfd
, 0x90, contents
+ roff
+ 1);
3274 bfd_put_8 (output_bfd
, 0xf7, contents
+ roff
);
3275 bfd_put_8 (output_bfd
, 0xd8, contents
+ roff
+ 1);
3289 /* LD->LE transition:
3291 leal foo(%reg), %eax; call ___tls_get_addr.
3293 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3294 BFD_ASSERT (rel
->r_offset
>= 2);
3295 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 2)
3297 val
= bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
- 1);
3298 BFD_ASSERT ((val
& 0xf8) == 0x80 && (val
& 7) != 4);
3299 BFD_ASSERT (rel
->r_offset
+ 9 <= input_section
->size
);
3300 BFD_ASSERT (bfd_get_8 (input_bfd
, contents
+ rel
->r_offset
+ 4)
3302 BFD_ASSERT (rel
+ 1 < relend
);
3303 BFD_ASSERT (ELF32_R_TYPE (rel
[1].r_info
) == R_386_PLT32
);
3304 memcpy (contents
+ rel
->r_offset
- 2,
3305 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3306 /* Skip R_386_PLT32. */
3311 if (htab
->sgot
== NULL
)
3314 off
= htab
->tls_ldm_got
.offset
;
3319 Elf_Internal_Rela outrel
;
3322 if (htab
->srelgot
== NULL
)
3325 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
3326 + htab
->sgot
->output_offset
+ off
);
3328 bfd_put_32 (output_bfd
, 0,
3329 htab
->sgot
->contents
+ off
);
3330 bfd_put_32 (output_bfd
, 0,
3331 htab
->sgot
->contents
+ off
+ 4);
3332 outrel
.r_info
= ELF32_R_INFO (0, R_386_TLS_DTPMOD32
);
3333 loc
= htab
->srelgot
->contents
;
3334 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3335 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3336 htab
->tls_ldm_got
.offset
|= 1;
3338 relocation
= htab
->sgot
->output_section
->vma
3339 + htab
->sgot
->output_offset
+ off
3340 - htab
->sgotplt
->output_section
->vma
3341 - htab
->sgotplt
->output_offset
;
3342 unresolved_reloc
= FALSE
;
3345 case R_386_TLS_LDO_32
:
3346 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
3347 relocation
-= dtpoff_base (info
);
3349 /* When converting LDO to LE, we must negate. */
3350 relocation
= -tpoff (info
, relocation
);
3353 case R_386_TLS_LE_32
:
3357 Elf_Internal_Rela outrel
;
3362 outrel
.r_offset
= rel
->r_offset
3363 + input_section
->output_section
->vma
3364 + input_section
->output_offset
;
3365 if (h
!= NULL
&& h
->dynindx
!= -1)
3369 if (r_type
== R_386_TLS_LE_32
)
3370 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF32
);
3372 outrel
.r_info
= ELF32_R_INFO (indx
, R_386_TLS_TPOFF
);
3373 sreloc
= elf_section_data (input_section
)->sreloc
;
3376 loc
= sreloc
->contents
;
3377 loc
+= sreloc
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3378 bfd_elf32_swap_reloc_out (output_bfd
, &outrel
, loc
);
3381 else if (r_type
== R_386_TLS_LE_32
)
3382 relocation
= dtpoff_base (info
) - relocation
;
3384 relocation
-= dtpoff_base (info
);
3386 else if (r_type
== R_386_TLS_LE_32
)
3387 relocation
= tpoff (info
, relocation
);
3389 relocation
= -tpoff (info
, relocation
);
3396 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3397 because such sections are not SEC_ALLOC and thus ld.so will
3398 not process them. */
3399 if (unresolved_reloc
3400 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3403 (*_bfd_error_handler
)
3404 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3407 (long) rel
->r_offset
,
3409 h
->root
.root
.string
);
3413 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3414 contents
, rel
->r_offset
,
3417 if (r
!= bfd_reloc_ok
)
3422 name
= h
->root
.root
.string
;
3425 name
= bfd_elf_string_from_elf_section (input_bfd
,
3426 symtab_hdr
->sh_link
,
3431 name
= bfd_section_name (input_bfd
, sec
);
3434 if (r
== bfd_reloc_overflow
)
3436 if (! ((*info
->callbacks
->reloc_overflow
)
3437 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3438 (bfd_vma
) 0, input_bfd
, input_section
,
3444 (*_bfd_error_handler
)
3445 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3446 input_bfd
, input_section
,
3447 (long) rel
->r_offset
, name
, (int) r
);
3456 /* Finish up dynamic symbol handling. We set the contents of various
3457 dynamic sections here. */
3460 elf_i386_finish_dynamic_symbol (bfd
*output_bfd
,
3461 struct bfd_link_info
*info
,
3462 struct elf_link_hash_entry
*h
,
3463 Elf_Internal_Sym
*sym
)
3465 struct elf_i386_link_hash_table
*htab
;
3467 htab
= elf_i386_hash_table (info
);
3469 if (h
->plt
.offset
!= (bfd_vma
) -1)
3473 Elf_Internal_Rela rel
;
3476 /* This symbol has an entry in the procedure linkage table. Set
3479 if (h
->dynindx
== -1
3480 || htab
->splt
== NULL
3481 || htab
->sgotplt
== NULL
3482 || htab
->srelplt
== NULL
)
3485 /* Get the index in the procedure linkage table which
3486 corresponds to this symbol. This is the index of this symbol
3487 in all the symbols for which we are making plt entries. The
3488 first entry in the procedure linkage table is reserved. */
3489 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
- 1;
3491 /* Get the offset into the .got table of the entry that
3492 corresponds to this function. Each .got entry is 4 bytes.
3493 The first three are reserved. */
3494 got_offset
= (plt_index
+ 3) * 4;
3496 /* Fill in the entry in the procedure linkage table. */
3499 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_plt_entry
,
3501 bfd_put_32 (output_bfd
,
3502 (htab
->sgotplt
->output_section
->vma
3503 + htab
->sgotplt
->output_offset
3505 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3507 if (htab
->is_vxworks
)
3509 int s
, k
, reloc_index
;
3511 /* Create the R_386_32 relocation referencing the GOT
3512 for this PLT entry. */
3514 /* S: Current slot number (zero-based). */
3515 s
= (h
->plt
.offset
- PLT_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3516 /* K: Number of relocations for PLTResolve. */
3518 k
= PLTRESOLVE_RELOCS_SHLIB
;
3520 k
= PLTRESOLVE_RELOCS
;
3521 /* Skip the PLTresolve relocations, and the relocations for
3522 the other PLT slots. */
3523 reloc_index
= k
+ s
* PLT_NON_JUMP_SLOT_RELOCS
;
3524 loc
= (htab
->srelplt2
->contents
+ reloc_index
3525 * sizeof (Elf32_External_Rel
));
3527 rel
.r_offset
= (htab
->splt
->output_section
->vma
3528 + htab
->splt
->output_offset
3529 + h
->plt
.offset
+ 2),
3530 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3531 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3533 /* Create the R_386_32 relocation referencing the beginning of
3534 the PLT for this GOT entry. */
3535 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3536 + htab
->sgotplt
->output_offset
3538 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3539 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3540 loc
+ sizeof (Elf32_External_Rel
));
3545 memcpy (htab
->splt
->contents
+ h
->plt
.offset
, elf_i386_pic_plt_entry
,
3547 bfd_put_32 (output_bfd
, got_offset
,
3548 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3551 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf32_External_Rel
),
3552 htab
->splt
->contents
+ h
->plt
.offset
+ 7);
3553 bfd_put_32 (output_bfd
, - (h
->plt
.offset
+ PLT_ENTRY_SIZE
),
3554 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3556 /* Fill in the entry in the global offset table. */
3557 bfd_put_32 (output_bfd
,
3558 (htab
->splt
->output_section
->vma
3559 + htab
->splt
->output_offset
3562 htab
->sgotplt
->contents
+ got_offset
);
3564 /* Fill in the entry in the .rel.plt section. */
3565 rel
.r_offset
= (htab
->sgotplt
->output_section
->vma
3566 + htab
->sgotplt
->output_offset
3568 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_JUMP_SLOT
);
3569 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf32_External_Rel
);
3570 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3572 if (!h
->def_regular
)
3574 /* Mark the symbol as undefined, rather than as defined in
3575 the .plt section. Leave the value if there were any
3576 relocations where pointer equality matters (this is a clue
3577 for the dynamic linker, to make function pointer
3578 comparisons work between an application and shared
3579 library), otherwise set it to zero. If a function is only
3580 called from a binary, there is no need to slow down
3581 shared libraries because of that. */
3582 sym
->st_shndx
= SHN_UNDEF
;
3583 if (!h
->pointer_equality_needed
)
3588 if (h
->got
.offset
!= (bfd_vma
) -1
3589 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h
)->tls_type
)
3590 && (elf_i386_hash_entry(h
)->tls_type
& GOT_TLS_IE
) == 0)
3592 Elf_Internal_Rela rel
;
3595 /* This symbol has an entry in the global offset table. Set it
3598 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3601 rel
.r_offset
= (htab
->sgot
->output_section
->vma
3602 + htab
->sgot
->output_offset
3603 + (h
->got
.offset
& ~(bfd_vma
) 1));
3605 /* If this is a static link, or it is a -Bsymbolic link and the
3606 symbol is defined locally or was forced to be local because
3607 of a version file, we just want to emit a RELATIVE reloc.
3608 The entry in the global offset table will already have been
3609 initialized in the relocate_section function. */
3611 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3613 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3614 rel
.r_info
= ELF32_R_INFO (0, R_386_RELATIVE
);
3618 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3619 bfd_put_32 (output_bfd
, (bfd_vma
) 0,
3620 htab
->sgot
->contents
+ h
->got
.offset
);
3621 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_GLOB_DAT
);
3624 loc
= htab
->srelgot
->contents
;
3625 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3626 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3631 Elf_Internal_Rela rel
;
3634 /* This symbol needs a copy reloc. Set it up. */
3636 if (h
->dynindx
== -1
3637 || (h
->root
.type
!= bfd_link_hash_defined
3638 && h
->root
.type
!= bfd_link_hash_defweak
)
3639 || htab
->srelbss
== NULL
)
3642 rel
.r_offset
= (h
->root
.u
.def
.value
3643 + h
->root
.u
.def
.section
->output_section
->vma
3644 + h
->root
.u
.def
.section
->output_offset
);
3645 rel
.r_info
= ELF32_R_INFO (h
->dynindx
, R_386_COPY
);
3646 loc
= htab
->srelbss
->contents
;
3647 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf32_External_Rel
);
3648 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, loc
);
3651 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3652 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3653 is relative to the ".got" section. */
3654 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3655 || (!htab
->is_vxworks
&& h
== htab
->elf
.hgot
))
3656 sym
->st_shndx
= SHN_ABS
;
3661 /* Used to decide how to sort relocs in an optimal manner for the
3662 dynamic linker, before writing them out. */
3664 static enum elf_reloc_type_class
3665 elf_i386_reloc_type_class (const Elf_Internal_Rela
*rela
)
3667 switch (ELF32_R_TYPE (rela
->r_info
))
3669 case R_386_RELATIVE
:
3670 return reloc_class_relative
;
3671 case R_386_JUMP_SLOT
:
3672 return reloc_class_plt
;
3674 return reloc_class_copy
;
3676 return reloc_class_normal
;
3680 /* Finish up the dynamic sections. */
3683 elf_i386_finish_dynamic_sections (bfd
*output_bfd
,
3684 struct bfd_link_info
*info
)
3686 struct elf_i386_link_hash_table
*htab
;
3690 htab
= elf_i386_hash_table (info
);
3691 dynobj
= htab
->elf
.dynobj
;
3692 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3694 if (htab
->elf
.dynamic_sections_created
)
3696 Elf32_External_Dyn
*dyncon
, *dynconend
;
3698 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3701 dyncon
= (Elf32_External_Dyn
*) sdyn
->contents
;
3702 dynconend
= (Elf32_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3703 for (; dyncon
< dynconend
; dyncon
++)
3705 Elf_Internal_Dyn dyn
;
3708 bfd_elf32_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3717 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3722 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3727 dyn
.d_un
.d_val
= s
->size
;
3731 /* My reading of the SVR4 ABI indicates that the
3732 procedure linkage table relocs (DT_JMPREL) should be
3733 included in the overall relocs (DT_REL). This is
3734 what Solaris does. However, UnixWare can not handle
3735 that case. Therefore, we override the DT_RELSZ entry
3736 here to make it not include the JMPREL relocs. */
3740 dyn
.d_un
.d_val
-= s
->size
;
3744 /* We may not be using the standard ELF linker script.
3745 If .rel.plt is the first .rel section, we adjust
3746 DT_REL to not include it. */
3750 if (dyn
.d_un
.d_ptr
!= s
->output_section
->vma
+ s
->output_offset
)
3752 dyn
.d_un
.d_ptr
+= s
->size
;
3756 bfd_elf32_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3759 /* Fill in the first entry in the procedure linkage table. */
3760 if (htab
->splt
&& htab
->splt
->size
> 0)
3764 memcpy (htab
->splt
->contents
, elf_i386_pic_plt0_entry
,
3765 sizeof (elf_i386_pic_plt0_entry
));
3766 memset (htab
->splt
->contents
+ sizeof (elf_i386_pic_plt0_entry
),
3767 htab
->plt0_pad_byte
,
3768 PLT_ENTRY_SIZE
- sizeof (elf_i386_pic_plt0_entry
));
3772 memcpy (htab
->splt
->contents
, elf_i386_plt0_entry
,
3773 sizeof(elf_i386_plt0_entry
));
3774 memset (htab
->splt
->contents
+ sizeof (elf_i386_plt0_entry
),
3775 htab
->plt0_pad_byte
,
3776 PLT_ENTRY_SIZE
- sizeof (elf_i386_plt0_entry
));
3777 bfd_put_32 (output_bfd
,
3778 (htab
->sgotplt
->output_section
->vma
3779 + htab
->sgotplt
->output_offset
3781 htab
->splt
->contents
+ 2);
3782 bfd_put_32 (output_bfd
,
3783 (htab
->sgotplt
->output_section
->vma
3784 + htab
->sgotplt
->output_offset
3786 htab
->splt
->contents
+ 8);
3788 if (htab
->is_vxworks
)
3790 Elf_Internal_Rela rel
;
3792 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3793 On IA32 we use REL relocations so the addend goes in
3794 the PLT directly. */
3795 rel
.r_offset
= (htab
->splt
->output_section
->vma
3796 + htab
->splt
->output_offset
3798 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3799 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3800 htab
->srelplt2
->contents
);
3801 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3802 rel
.r_offset
= (htab
->splt
->output_section
->vma
3803 + htab
->splt
->output_offset
3805 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3806 bfd_elf32_swap_reloc_out (output_bfd
, &rel
,
3807 htab
->srelplt2
->contents
+
3808 sizeof (Elf32_External_Rel
));
3812 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3813 really seem like the right value. */
3814 elf_section_data (htab
->splt
->output_section
)
3815 ->this_hdr
.sh_entsize
= 4;
3817 /* Correct the .rel.plt.unloaded relocations. */
3818 if (htab
->is_vxworks
&& !info
->shared
)
3820 int num_plts
= (htab
->splt
->size
/ PLT_ENTRY_SIZE
) - 1;
3823 p
= htab
->srelplt2
->contents
;
3825 p
+= PLTRESOLVE_RELOCS_SHLIB
* sizeof (Elf32_External_Rel
);
3827 p
+= PLTRESOLVE_RELOCS
* sizeof (Elf32_External_Rel
);
3829 for (; num_plts
; num_plts
--)
3831 Elf_Internal_Rela rel
;
3832 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3833 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hgot
->indx
, R_386_32
);
3834 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3835 p
+= sizeof (Elf32_External_Rel
);
3837 bfd_elf32_swap_reloc_in (output_bfd
, p
, &rel
);
3838 rel
.r_info
= ELF32_R_INFO (htab
->elf
.hplt
->indx
, R_386_32
);
3839 bfd_elf32_swap_reloc_out (output_bfd
, &rel
, p
);
3840 p
+= sizeof (Elf32_External_Rel
);
3848 /* Fill in the first three entries in the global offset table. */
3849 if (htab
->sgotplt
->size
> 0)
3851 bfd_put_32 (output_bfd
,
3853 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3854 htab
->sgotplt
->contents
);
3855 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 4);
3856 bfd_put_32 (output_bfd
, 0, htab
->sgotplt
->contents
+ 8);
3859 elf_section_data (htab
->sgotplt
->output_section
)->this_hdr
.sh_entsize
= 4;
3862 if (htab
->sgot
&& htab
->sgot
->size
> 0)
3863 elf_section_data (htab
->sgot
->output_section
)->this_hdr
.sh_entsize
= 4;
3868 /* Return address for Ith PLT stub in section PLT, for relocation REL
3869 or (bfd_vma) -1 if it should not be included. */
3872 elf_i386_plt_sym_val (bfd_vma i
, const asection
*plt
,
3873 const arelent
*rel ATTRIBUTE_UNUSED
)
3875 return plt
->vma
+ (i
+ 1) * PLT_ENTRY_SIZE
;
3879 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3880 #define TARGET_LITTLE_NAME "elf32-i386"
3881 #define ELF_ARCH bfd_arch_i386
3882 #define ELF_MACHINE_CODE EM_386
3883 #define ELF_MAXPAGESIZE 0x1000
3885 #define elf_backend_can_gc_sections 1
3886 #define elf_backend_can_refcount 1
3887 #define elf_backend_want_got_plt 1
3888 #define elf_backend_plt_readonly 1
3889 #define elf_backend_want_plt_sym 0
3890 #define elf_backend_got_header_size 12
3892 /* Support RELA for objdump of prelink objects. */
3893 #define elf_info_to_howto elf_i386_info_to_howto_rel
3894 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3896 #define bfd_elf32_mkobject elf_i386_mkobject
3898 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3899 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3900 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3902 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3903 #define elf_backend_check_relocs elf_i386_check_relocs
3904 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
3905 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
3906 #define elf_backend_fake_sections elf_i386_fake_sections
3907 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3908 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3909 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3910 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
3911 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
3912 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
3913 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
3914 #define elf_backend_relocate_section elf_i386_relocate_section
3915 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
3916 #define elf_backend_always_size_sections elf_i386_always_size_sections
3917 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
3919 #include "elf32-target.h"
3921 /* FreeBSD support. */
3923 #undef TARGET_LITTLE_SYM
3924 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3925 #undef TARGET_LITTLE_NAME
3926 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3928 /* The kernel recognizes executables as valid only if they carry a
3929 "FreeBSD" label in the ELF header. So we put this label on all
3930 executables and (for simplicity) also all other object files. */
3933 elf_i386_post_process_headers (bfd
*abfd
,
3934 struct bfd_link_info
*info ATTRIBUTE_UNUSED
)
3936 Elf_Internal_Ehdr
*i_ehdrp
;
3938 i_ehdrp
= elf_elfheader (abfd
);
3940 /* Put an ABI label supported by FreeBSD >= 4.1. */
3941 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
3942 #ifdef OLD_FREEBSD_ABI_LABEL
3943 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3944 memcpy (&i_ehdrp
->e_ident
[EI_ABIVERSION
], "FreeBSD", 8);
3948 #undef elf_backend_post_process_headers
3949 #define elf_backend_post_process_headers elf_i386_post_process_headers
3951 #define elf32_bed elf32_i386_fbsd_bed
3953 #include "elf32-target.h"
3955 /* VxWorks support. */
3957 #undef TARGET_LITTLE_SYM
3958 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3959 #undef TARGET_LITTLE_NAME
3960 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3963 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3965 static struct bfd_link_hash_table
*
3966 elf_i386_vxworks_link_hash_table_create (bfd
*abfd
)
3968 struct bfd_link_hash_table
*ret
;
3969 struct elf_i386_link_hash_table
*htab
;
3971 ret
= elf_i386_link_hash_table_create (abfd
);
3974 htab
= (struct elf_i386_link_hash_table
*) ret
;
3975 htab
->is_vxworks
= 1;
3976 htab
->plt0_pad_byte
= 0x90;
3983 #undef elf_backend_post_process_headers
3984 #undef bfd_elf32_bfd_link_hash_table_create
3985 #define bfd_elf32_bfd_link_hash_table_create \
3986 elf_i386_vxworks_link_hash_table_create
3987 #undef elf_backend_add_symbol_hook
3988 #define elf_backend_add_symbol_hook \
3989 elf_vxworks_add_symbol_hook
3990 #undef elf_backend_link_output_symbol_hook
3991 #define elf_backend_link_output_symbol_hook \
3992 elf_vxworks_link_output_symbol_hook
3993 #undef elf_backend_emit_relocs
3994 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
3995 #undef elf_backend_final_write_processing
3996 #define elf_backend_final_write_processing \
3997 elf_vxworks_final_write_processing
3999 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4001 #undef elf_backend_want_plt_sym
4002 #define elf_backend_want_plt_sym 1
4005 #define elf32_bed elf32_i386_vxworks_bed
4007 #include "elf32-target.h"