1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 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 3 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,
20 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 /* 386 uses REL relocations instead of RELA. */
37 static reloc_howto_type elf_howto_table[]=
39 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
40 bfd_elf_generic_reloc, "R_386_NONE",
41 TRUE, 0x00000000, 0x00000000, FALSE),
42 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
43 bfd_elf_generic_reloc, "R_386_32",
44 TRUE, 0xffffffff, 0xffffffff, FALSE),
45 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
46 bfd_elf_generic_reloc, "R_386_PC32",
47 TRUE, 0xffffffff, 0xffffffff, TRUE),
48 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
49 bfd_elf_generic_reloc, "R_386_GOT32",
50 TRUE, 0xffffffff, 0xffffffff, FALSE),
51 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
52 bfd_elf_generic_reloc, "R_386_PLT32",
53 TRUE, 0xffffffff, 0xffffffff, TRUE),
54 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
55 bfd_elf_generic_reloc, "R_386_COPY",
56 TRUE, 0xffffffff, 0xffffffff, FALSE),
57 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
58 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
59 TRUE, 0xffffffff, 0xffffffff, FALSE),
60 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
61 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
62 TRUE, 0xffffffff, 0xffffffff, FALSE),
63 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_386_RELATIVE",
65 TRUE, 0xffffffff, 0xffffffff, FALSE),
66 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_386_GOTOFF",
68 TRUE, 0xffffffff, 0xffffffff, FALSE),
69 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_386_GOTPC",
71 TRUE, 0xffffffff, 0xffffffff, TRUE),
73 /* We have a gap in the reloc numbers here.
74 R_386_standard counts the number up to this point, and
75 R_386_ext_offset is the value to subtract from a reloc type of
76 R_386_16 thru R_386_PC8 to form an index into this table. */
77 #define R_386_standard (R_386_GOTPC + 1)
78 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
80 /* These relocs are a GNU extension. */
81 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
83 TRUE, 0xffffffff, 0xffffffff, FALSE),
84 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_386_TLS_IE",
86 TRUE, 0xffffffff, 0xffffffff, FALSE),
87 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
89 TRUE, 0xffffffff, 0xffffffff, FALSE),
90 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_386_TLS_LE",
92 TRUE, 0xffffffff, 0xffffffff, FALSE),
93 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_386_TLS_GD",
95 TRUE, 0xffffffff, 0xffffffff, FALSE),
96 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_386_TLS_LDM",
98 TRUE, 0xffffffff, 0xffffffff, FALSE),
99 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_386_16",
101 TRUE, 0xffff, 0xffff, FALSE),
102 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_386_PC16",
104 TRUE, 0xffff, 0xffff, TRUE),
105 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_386_8",
107 TRUE, 0xff, 0xff, FALSE),
108 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
109 bfd_elf_generic_reloc, "R_386_PC8",
110 TRUE, 0xff, 0xff, TRUE),
112 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
113 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
114 /* These are common with Solaris TLS implementation. */
115 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
117 TRUE, 0xffffffff, 0xffffffff, FALSE),
118 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
120 TRUE, 0xffffffff, 0xffffffff, FALSE),
121 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
123 TRUE, 0xffffffff, 0xffffffff, FALSE),
124 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
126 TRUE, 0xffffffff, 0xffffffff, FALSE),
127 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
129 TRUE, 0xffffffff, 0xffffffff, FALSE),
130 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
134 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
136 TRUE, 0xffffffff, 0xffffffff, FALSE),
137 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
138 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
140 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_386_TLS_DESC",
142 TRUE, 0xffffffff, 0xffffffff, FALSE),
143 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_386_IRELATIVE",
145 TRUE, 0xffffffff, 0xffffffff, FALSE),
148 #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset)
149 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative)
151 /* GNU extension to record C++ vtable hierarchy. */
152 HOWTO (R_386_GNU_VTINHERIT, /* type */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
156 FALSE, /* pc_relative */
158 complain_overflow_dont, /* complain_on_overflow */
159 NULL, /* special_function */
160 "R_386_GNU_VTINHERIT", /* name */
161 FALSE, /* partial_inplace */
164 FALSE), /* pcrel_offset */
166 /* GNU extension to record C++ vtable member usage. */
167 HOWTO (R_386_GNU_VTENTRY, /* type */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
171 FALSE, /* pc_relative */
173 complain_overflow_dont, /* complain_on_overflow */
174 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
175 "R_386_GNU_VTENTRY", /* name */
176 FALSE, /* partial_inplace */
179 FALSE) /* pcrel_offset */
181 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
185 #ifdef DEBUG_GEN_RELOC
187 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
192 static reloc_howto_type *
193 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
194 bfd_reloc_code_real_type code)
199 TRACE ("BFD_RELOC_NONE");
200 return &elf_howto_table[R_386_NONE];
203 TRACE ("BFD_RELOC_32");
204 return &elf_howto_table[R_386_32];
207 TRACE ("BFD_RELOC_CTOR");
208 return &elf_howto_table[R_386_32];
210 case BFD_RELOC_32_PCREL:
211 TRACE ("BFD_RELOC_PC32");
212 return &elf_howto_table[R_386_PC32];
214 case BFD_RELOC_386_GOT32:
215 TRACE ("BFD_RELOC_386_GOT32");
216 return &elf_howto_table[R_386_GOT32];
218 case BFD_RELOC_386_PLT32:
219 TRACE ("BFD_RELOC_386_PLT32");
220 return &elf_howto_table[R_386_PLT32];
222 case BFD_RELOC_386_COPY:
223 TRACE ("BFD_RELOC_386_COPY");
224 return &elf_howto_table[R_386_COPY];
226 case BFD_RELOC_386_GLOB_DAT:
227 TRACE ("BFD_RELOC_386_GLOB_DAT");
228 return &elf_howto_table[R_386_GLOB_DAT];
230 case BFD_RELOC_386_JUMP_SLOT:
231 TRACE ("BFD_RELOC_386_JUMP_SLOT");
232 return &elf_howto_table[R_386_JUMP_SLOT];
234 case BFD_RELOC_386_RELATIVE:
235 TRACE ("BFD_RELOC_386_RELATIVE");
236 return &elf_howto_table[R_386_RELATIVE];
238 case BFD_RELOC_386_GOTOFF:
239 TRACE ("BFD_RELOC_386_GOTOFF");
240 return &elf_howto_table[R_386_GOTOFF];
242 case BFD_RELOC_386_GOTPC:
243 TRACE ("BFD_RELOC_386_GOTPC");
244 return &elf_howto_table[R_386_GOTPC];
246 /* These relocs are a GNU extension. */
247 case BFD_RELOC_386_TLS_TPOFF:
248 TRACE ("BFD_RELOC_386_TLS_TPOFF");
249 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
251 case BFD_RELOC_386_TLS_IE:
252 TRACE ("BFD_RELOC_386_TLS_IE");
253 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
255 case BFD_RELOC_386_TLS_GOTIE:
256 TRACE ("BFD_RELOC_386_TLS_GOTIE");
257 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
259 case BFD_RELOC_386_TLS_LE:
260 TRACE ("BFD_RELOC_386_TLS_LE");
261 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
263 case BFD_RELOC_386_TLS_GD:
264 TRACE ("BFD_RELOC_386_TLS_GD");
265 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
267 case BFD_RELOC_386_TLS_LDM:
268 TRACE ("BFD_RELOC_386_TLS_LDM");
269 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
272 TRACE ("BFD_RELOC_16");
273 return &elf_howto_table[R_386_16 - R_386_ext_offset];
275 case BFD_RELOC_16_PCREL:
276 TRACE ("BFD_RELOC_16_PCREL");
277 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
280 TRACE ("BFD_RELOC_8");
281 return &elf_howto_table[R_386_8 - R_386_ext_offset];
283 case BFD_RELOC_8_PCREL:
284 TRACE ("BFD_RELOC_8_PCREL");
285 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
287 /* Common with Sun TLS implementation. */
288 case BFD_RELOC_386_TLS_LDO_32:
289 TRACE ("BFD_RELOC_386_TLS_LDO_32");
290 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
292 case BFD_RELOC_386_TLS_IE_32:
293 TRACE ("BFD_RELOC_386_TLS_IE_32");
294 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
296 case BFD_RELOC_386_TLS_LE_32:
297 TRACE ("BFD_RELOC_386_TLS_LE_32");
298 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
300 case BFD_RELOC_386_TLS_DTPMOD32:
301 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
302 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
304 case BFD_RELOC_386_TLS_DTPOFF32:
305 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
306 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
308 case BFD_RELOC_386_TLS_TPOFF32:
309 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
310 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
312 case BFD_RELOC_386_TLS_GOTDESC:
313 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
314 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
316 case BFD_RELOC_386_TLS_DESC_CALL:
317 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
318 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
320 case BFD_RELOC_386_TLS_DESC:
321 TRACE ("BFD_RELOC_386_TLS_DESC");
322 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
324 case BFD_RELOC_386_IRELATIVE:
325 TRACE ("BFD_RELOC_386_IRELATIVE");
326 return &elf_howto_table[R_386_IRELATIVE];
328 case BFD_RELOC_VTABLE_INHERIT:
329 TRACE ("BFD_RELOC_VTABLE_INHERIT");
330 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
332 case BFD_RELOC_VTABLE_ENTRY:
333 TRACE ("BFD_RELOC_VTABLE_ENTRY");
334 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
344 static reloc_howto_type *
345 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
350 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
351 if (elf_howto_table[i].name != NULL
352 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
353 return &elf_howto_table[i];
358 static reloc_howto_type *
359 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
363 if ((indx = r_type) >= R_386_standard
364 && ((indx = r_type - R_386_ext_offset) - R_386_standard
365 >= R_386_ext - R_386_standard)
366 && ((indx = r_type - R_386_tls_offset) - R_386_ext
367 >= R_386_irelative - R_386_ext)
368 && ((indx = r_type - R_386_vt_offset) - R_386_irelative
369 >= R_386_vt - R_386_irelative))
371 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
375 BFD_ASSERT (elf_howto_table [indx].type == r_type);
376 return &elf_howto_table[indx];
380 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
382 Elf_Internal_Rela *dst)
384 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
385 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
388 /* Return whether a symbol name implies a local label. The UnixWare
389 2.1 cc generates temporary symbols that start with .X, so we
390 recognize them here. FIXME: do other SVR4 compilers also use .X?.
391 If so, we should move the .X recognition into
392 _bfd_elf_is_local_label_name. */
395 elf_i386_is_local_label_name (bfd *abfd, const char *name)
397 if (name[0] == '.' && name[1] == 'X')
400 return _bfd_elf_is_local_label_name (abfd, name);
403 /* Support for core dump NOTE sections. */
406 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
411 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
413 int pr_version = bfd_get_32 (abfd, note->descdata);
419 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
422 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
426 size = bfd_get_32 (abfd, note->descdata + 8);
430 switch (note->descsz)
435 case 144: /* Linux/i386 */
437 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
440 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
450 /* Make a ".reg/999" section. */
451 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
452 size, note->descpos + offset);
456 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
458 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
460 int pr_version = bfd_get_32 (abfd, note->descdata);
465 elf_tdata (abfd)->core_program
466 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
467 elf_tdata (abfd)->core_command
468 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
472 switch (note->descsz)
477 case 124: /* Linux/i386 elf_prpsinfo. */
478 elf_tdata (abfd)->core_pid
479 = bfd_get_32 (abfd, note->descdata + 12);
480 elf_tdata (abfd)->core_program
481 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
482 elf_tdata (abfd)->core_command
483 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
487 /* Note that for some reason, a spurious space is tacked
488 onto the end of the args in some (at least one anyway)
489 implementations, so strip it off if it exists. */
491 char *command = elf_tdata (abfd)->core_command;
492 int n = strlen (command);
494 if (0 < n && command[n - 1] == ' ')
495 command[n - 1] = '\0';
501 /* Functions for the i386 ELF linker.
503 In order to gain some understanding of code in this file without
504 knowing all the intricate details of the linker, note the
507 Functions named elf_i386_* are called by external routines, other
508 functions are only called locally. elf_i386_* functions appear
509 in this file more or less in the order in which they are called
510 from external routines. eg. elf_i386_check_relocs is called
511 early in the link process, elf_i386_finish_dynamic_sections is
512 one of the last functions. */
515 /* The name of the dynamic interpreter. This is put in the .interp
518 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
520 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
521 copying dynamic variables from a shared lib into an app's dynbss
522 section, and instead use a dynamic relocation to point into the
524 #define ELIMINATE_COPY_RELOCS 1
526 /* The size in bytes of an entry in the procedure linkage table. */
528 #define PLT_ENTRY_SIZE 16
530 /* The first entry in an absolute procedure linkage table looks like
531 this. See the SVR4 ABI i386 supplement to see how this works.
532 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
534 static const bfd_byte elf_i386_plt0_entry[12] =
536 0xff, 0x35, /* pushl contents of address */
537 0, 0, 0, 0, /* replaced with address of .got + 4. */
538 0xff, 0x25, /* jmp indirect */
539 0, 0, 0, 0 /* replaced with address of .got + 8. */
542 /* Subsequent entries in an absolute procedure linkage table look like
545 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
547 0xff, 0x25, /* jmp indirect */
548 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
549 0x68, /* pushl immediate */
550 0, 0, 0, 0, /* replaced with offset into relocation table. */
551 0xe9, /* jmp relative */
552 0, 0, 0, 0 /* replaced with offset to start of .plt. */
555 /* The first entry in a PIC procedure linkage table look like this.
556 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
558 static const bfd_byte elf_i386_pic_plt0_entry[12] =
560 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
561 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
564 /* Subsequent entries in a PIC procedure linkage table look like this. */
566 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
568 0xff, 0xa3, /* jmp *offset(%ebx) */
569 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
570 0x68, /* pushl immediate */
571 0, 0, 0, 0, /* replaced with offset into relocation table. */
572 0xe9, /* jmp relative */
573 0, 0, 0, 0 /* replaced with offset to start of .plt. */
576 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
577 for the PLTResolve stub and then for each PLT entry. */
578 #define PLTRESOLVE_RELOCS_SHLIB 0
579 #define PLTRESOLVE_RELOCS 2
580 #define PLT_NON_JUMP_SLOT_RELOCS 2
582 /* i386 ELF linker hash entry. */
584 struct elf_i386_link_hash_entry
586 struct elf_link_hash_entry elf;
588 /* Track dynamic relocs copied for this symbol. */
589 struct elf_dyn_relocs *dyn_relocs;
591 #define GOT_UNKNOWN 0
595 #define GOT_TLS_IE_POS 5
596 #define GOT_TLS_IE_NEG 6
597 #define GOT_TLS_IE_BOTH 7
598 #define GOT_TLS_GDESC 8
599 #define GOT_TLS_GD_BOTH_P(type) \
600 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
601 #define GOT_TLS_GD_P(type) \
602 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
603 #define GOT_TLS_GDESC_P(type) \
604 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
605 #define GOT_TLS_GD_ANY_P(type) \
606 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
607 unsigned char tls_type;
609 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
610 starting at the end of the jump table. */
614 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
616 struct elf_i386_obj_tdata
618 struct elf_obj_tdata root;
620 /* tls_type for each local got entry. */
621 char *local_got_tls_type;
623 /* GOTPLT entries for TLS descriptors. */
624 bfd_vma *local_tlsdesc_gotent;
627 #define elf_i386_tdata(abfd) \
628 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
630 #define elf_i386_local_got_tls_type(abfd) \
631 (elf_i386_tdata (abfd)->local_got_tls_type)
633 #define elf_i386_local_tlsdesc_gotent(abfd) \
634 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
636 #define is_i386_elf(bfd) \
637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
638 && elf_tdata (bfd) != NULL \
639 && elf_object_id (bfd) == I386_ELF_DATA)
642 elf_i386_mkobject (bfd *abfd)
644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
648 /* i386 ELF linker hash table. */
650 struct elf_i386_link_hash_table
652 struct elf_link_hash_table elf;
654 /* Short-cuts to get to dynamic linker sections. */
660 bfd_signed_vma refcount;
664 /* The amount of space used by the reserved portion of the sgotplt
665 section, plus whatever space is used by the jump slots. */
666 bfd_vma sgotplt_jump_table_size;
668 /* Small local sym cache. */
669 struct sym_cache sym_cache;
671 /* _TLS_MODULE_BASE_ symbol. */
672 struct bfd_link_hash_entry *tls_module_base;
674 /* Used by local STT_GNU_IFUNC symbols. */
675 htab_t loc_hash_table;
676 void * loc_hash_memory;
678 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
681 /* True if the target system is VxWorks. */
684 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
685 bfd_vma next_tls_desc_index;
687 /* Value used to fill the last word of the first plt entry. */
688 bfd_byte plt0_pad_byte;
691 /* Get the i386 ELF linker hash table from a link_info structure. */
693 #define elf_i386_hash_table(p) \
694 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
695 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
697 #define elf_i386_compute_jump_table_size(htab) \
698 ((htab)->next_tls_desc_index * 4)
700 /* Create an entry in an i386 ELF linker hash table. */
702 static struct bfd_hash_entry *
703 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
704 struct bfd_hash_table *table,
707 /* Allocate the structure if it has not already been allocated by a
711 entry = (struct bfd_hash_entry *)
712 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
717 /* Call the allocation method of the superclass. */
718 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
721 struct elf_i386_link_hash_entry *eh;
723 eh = (struct elf_i386_link_hash_entry *) entry;
724 eh->dyn_relocs = NULL;
725 eh->tls_type = GOT_UNKNOWN;
726 eh->tlsdesc_got = (bfd_vma) -1;
732 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
733 for local symbol so that we can handle local STT_GNU_IFUNC symbols
734 as global symbol. We reuse indx and dynstr_index for local symbol
735 hash since they aren't used by global symbols in this backend. */
738 elf_i386_local_htab_hash (const void *ptr)
740 struct elf_link_hash_entry *h
741 = (struct elf_link_hash_entry *) ptr;
742 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
745 /* Compare local hash entries. */
748 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
750 struct elf_link_hash_entry *h1
751 = (struct elf_link_hash_entry *) ptr1;
752 struct elf_link_hash_entry *h2
753 = (struct elf_link_hash_entry *) ptr2;
755 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
758 /* Find and/or create a hash entry for local symbol. */
760 static struct elf_link_hash_entry *
761 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
762 bfd *abfd, const Elf_Internal_Rela *rel,
765 struct elf_i386_link_hash_entry e, *ret;
766 asection *sec = abfd->sections;
767 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
768 ELF32_R_SYM (rel->r_info));
771 e.elf.indx = sec->id;
772 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
773 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
774 create ? INSERT : NO_INSERT);
781 ret = (struct elf_i386_link_hash_entry *) *slot;
785 ret = (struct elf_i386_link_hash_entry *)
786 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
787 sizeof (struct elf_i386_link_hash_entry));
790 memset (ret, 0, sizeof (*ret));
791 ret->elf.indx = sec->id;
792 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
793 ret->elf.dynindx = -1;
799 /* Create an i386 ELF linker hash table. */
801 static struct bfd_link_hash_table *
802 elf_i386_link_hash_table_create (bfd *abfd)
804 struct elf_i386_link_hash_table *ret;
805 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
807 ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt);
811 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
812 elf_i386_link_hash_newfunc,
813 sizeof (struct elf_i386_link_hash_entry),
822 ret->tls_ldm_got.refcount = 0;
823 ret->next_tls_desc_index = 0;
824 ret->sgotplt_jump_table_size = 0;
825 ret->sym_cache.abfd = NULL;
827 ret->srelplt2 = NULL;
828 ret->plt0_pad_byte = 0;
829 ret->tls_module_base = NULL;
831 ret->loc_hash_table = htab_try_create (1024,
832 elf_i386_local_htab_hash,
833 elf_i386_local_htab_eq,
835 ret->loc_hash_memory = objalloc_create ();
836 if (!ret->loc_hash_table || !ret->loc_hash_memory)
842 return &ret->elf.root;
845 /* Destroy an i386 ELF linker hash table. */
848 elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash)
850 struct elf_i386_link_hash_table *htab
851 = (struct elf_i386_link_hash_table *) hash;
853 if (htab->loc_hash_table)
854 htab_delete (htab->loc_hash_table);
855 if (htab->loc_hash_memory)
856 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
857 _bfd_generic_link_hash_table_free (hash);
860 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
861 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
865 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
867 struct elf_i386_link_hash_table *htab;
869 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
872 htab = elf_i386_hash_table (info);
876 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
878 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
881 || (!info->shared && !htab->srelbss))
885 && !elf_vxworks_create_dynamic_sections (dynobj, info,
892 /* Copy the extra info we tack onto an elf_link_hash_entry. */
895 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
896 struct elf_link_hash_entry *dir,
897 struct elf_link_hash_entry *ind)
899 struct elf_i386_link_hash_entry *edir, *eind;
901 edir = (struct elf_i386_link_hash_entry *) dir;
902 eind = (struct elf_i386_link_hash_entry *) ind;
904 if (eind->dyn_relocs != NULL)
906 if (edir->dyn_relocs != NULL)
908 struct elf_dyn_relocs **pp;
909 struct elf_dyn_relocs *p;
911 /* Add reloc counts against the indirect sym to the direct sym
912 list. Merge any entries against the same section. */
913 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
915 struct elf_dyn_relocs *q;
917 for (q = edir->dyn_relocs; q != NULL; q = q->next)
918 if (q->sec == p->sec)
920 q->pc_count += p->pc_count;
921 q->count += p->count;
928 *pp = edir->dyn_relocs;
931 edir->dyn_relocs = eind->dyn_relocs;
932 eind->dyn_relocs = NULL;
935 if (ind->root.type == bfd_link_hash_indirect
936 && dir->got.refcount <= 0)
938 edir->tls_type = eind->tls_type;
939 eind->tls_type = GOT_UNKNOWN;
942 if (ELIMINATE_COPY_RELOCS
943 && ind->root.type != bfd_link_hash_indirect
944 && dir->dynamic_adjusted)
946 /* If called to transfer flags for a weakdef during processing
947 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
948 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
949 dir->ref_dynamic |= ind->ref_dynamic;
950 dir->ref_regular |= ind->ref_regular;
951 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
952 dir->needs_plt |= ind->needs_plt;
953 dir->pointer_equality_needed |= ind->pointer_equality_needed;
956 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
966 /* Return TRUE if the TLS access code sequence support transition
970 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
972 Elf_Internal_Shdr *symtab_hdr,
973 struct elf_link_hash_entry **sym_hashes,
975 const Elf_Internal_Rela *rel,
976 const Elf_Internal_Rela *relend)
978 unsigned int val, type;
979 unsigned long r_symndx;
980 struct elf_link_hash_entry *h;
983 /* Get the section contents. */
984 if (contents == NULL)
986 if (elf_section_data (sec)->this_hdr.contents != NULL)
987 contents = elf_section_data (sec)->this_hdr.contents;
990 /* FIXME: How to better handle error condition? */
991 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
994 /* Cache the section contents for elf_link_input_bfd. */
995 elf_section_data (sec)->this_hdr.contents = contents;
999 offset = rel->r_offset;
1004 if (offset < 2 || (rel + 1) >= relend)
1007 type = bfd_get_8 (abfd, contents + offset - 2);
1008 if (r_type == R_386_TLS_GD)
1010 /* Check transition from GD access model. Only
1011 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1012 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1013 can transit to different access model. */
1014 if ((offset + 10) > sec->size ||
1015 (type != 0x8d && type != 0x04))
1018 val = bfd_get_8 (abfd, contents + offset - 1);
1021 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1025 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1028 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1033 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1034 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1037 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1043 /* Check transition from LD access model. Only
1044 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1045 can transit to different access model. */
1046 if (type != 0x8d || (offset + 9) > sec->size)
1049 val = bfd_get_8 (abfd, contents + offset - 1);
1050 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1054 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1057 r_symndx = ELF32_R_SYM (rel[1].r_info);
1058 if (r_symndx < symtab_hdr->sh_info)
1061 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1062 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1063 may be versioned. */
1065 && h->root.root.string != NULL
1066 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1067 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1068 && (strncmp (h->root.root.string, "___tls_get_addr",
1072 /* Check transition from IE access model:
1073 movl foo@indntpoff(%rip), %eax
1074 movl foo@indntpoff(%rip), %reg
1075 addl foo@indntpoff(%rip), %reg
1078 if (offset < 1 || (offset + 4) > sec->size)
1081 /* Check "movl foo@tpoff(%rip), %eax" first. */
1082 val = bfd_get_8 (abfd, contents + offset - 1);
1089 /* Check movl|addl foo@tpoff(%rip), %reg. */
1090 type = bfd_get_8 (abfd, contents + offset - 2);
1091 return ((type == 0x8b || type == 0x03)
1092 && (val & 0xc7) == 0x05);
1094 case R_386_TLS_GOTIE:
1095 case R_386_TLS_IE_32:
1096 /* Check transition from {IE_32,GOTIE} access model:
1097 subl foo@{tpoff,gontoff}(%reg1), %reg2
1098 movl foo@{tpoff,gontoff}(%reg1), %reg2
1099 addl foo@{tpoff,gontoff}(%reg1), %reg2
1102 if (offset < 2 || (offset + 4) > sec->size)
1105 val = bfd_get_8 (abfd, contents + offset - 1);
1106 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1109 type = bfd_get_8 (abfd, contents + offset - 2);
1110 return type == 0x8b || type == 0x2b || type == 0x03;
1112 case R_386_TLS_GOTDESC:
1113 /* Check transition from GDesc access model:
1114 leal x@tlsdesc(%ebx), %eax
1116 Make sure it's a leal adding ebx to a 32-bit offset
1117 into any register, although it's probably almost always
1120 if (offset < 2 || (offset + 4) > sec->size)
1123 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1126 val = bfd_get_8 (abfd, contents + offset - 1);
1127 return (val & 0xc7) == 0x83;
1129 case R_386_TLS_DESC_CALL:
1130 /* Check transition from GDesc access model:
1131 call *x@tlsdesc(%rax)
1133 if (offset + 2 <= sec->size)
1135 /* Make sure that it's a call *x@tlsdesc(%rax). */
1136 static i386_opcode16 call = { { 0xff, 0x10 } };
1137 return bfd_get_16 (abfd, contents + offset) == call.i;
1147 /* Return TRUE if the TLS access transition is OK or no transition
1148 will be performed. Update R_TYPE if there is a transition. */
1151 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1152 asection *sec, bfd_byte *contents,
1153 Elf_Internal_Shdr *symtab_hdr,
1154 struct elf_link_hash_entry **sym_hashes,
1155 unsigned int *r_type, int tls_type,
1156 const Elf_Internal_Rela *rel,
1157 const Elf_Internal_Rela *relend,
1158 struct elf_link_hash_entry *h,
1159 unsigned long r_symndx)
1161 unsigned int from_type = *r_type;
1162 unsigned int to_type = from_type;
1163 bfd_boolean check = TRUE;
1165 /* Skip TLS transition for functions. */
1167 && (h->type == STT_FUNC
1168 || h->type == STT_GNU_IFUNC))
1174 case R_386_TLS_GOTDESC:
1175 case R_386_TLS_DESC_CALL:
1176 case R_386_TLS_IE_32:
1178 case R_386_TLS_GOTIE:
1179 if (info->executable)
1182 to_type = R_386_TLS_LE_32;
1183 else if (from_type != R_386_TLS_IE
1184 && from_type != R_386_TLS_GOTIE)
1185 to_type = R_386_TLS_IE_32;
1188 /* When we are called from elf_i386_relocate_section, CONTENTS
1189 isn't NULL and there may be additional transitions based on
1191 if (contents != NULL)
1193 unsigned int new_to_type = to_type;
1195 if (info->executable
1198 && (tls_type & GOT_TLS_IE))
1199 new_to_type = R_386_TLS_LE_32;
1201 if (to_type == R_386_TLS_GD
1202 || to_type == R_386_TLS_GOTDESC
1203 || to_type == R_386_TLS_DESC_CALL)
1205 if (tls_type == GOT_TLS_IE_POS)
1206 new_to_type = R_386_TLS_GOTIE;
1207 else if (tls_type & GOT_TLS_IE)
1208 new_to_type = R_386_TLS_IE_32;
1211 /* We checked the transition before when we were called from
1212 elf_i386_check_relocs. We only want to check the new
1213 transition which hasn't been checked before. */
1214 check = new_to_type != to_type && from_type == to_type;
1215 to_type = new_to_type;
1221 if (info->executable)
1222 to_type = R_386_TLS_LE_32;
1229 /* Return TRUE if there is no transition. */
1230 if (from_type == to_type)
1233 /* Check if the transition can be performed. */
1235 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1236 symtab_hdr, sym_hashes,
1237 from_type, rel, relend))
1239 reloc_howto_type *from, *to;
1242 from = elf_i386_rtype_to_howto (abfd, from_type);
1243 to = elf_i386_rtype_to_howto (abfd, to_type);
1246 name = h->root.root.string;
1249 struct elf_i386_link_hash_table *htab;
1251 htab = elf_i386_hash_table (info);
1256 Elf_Internal_Sym *isym;
1258 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1260 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1264 (*_bfd_error_handler)
1265 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1266 "in section `%A' failed"),
1267 abfd, sec, from->name, to->name, name,
1268 (unsigned long) rel->r_offset);
1269 bfd_set_error (bfd_error_bad_value);
1277 /* Look through the relocs for a section during the first phase, and
1278 calculate needed space in the global offset table, procedure linkage
1279 table, and dynamic reloc sections. */
1282 elf_i386_check_relocs (bfd *abfd,
1283 struct bfd_link_info *info,
1285 const Elf_Internal_Rela *relocs)
1287 struct elf_i386_link_hash_table *htab;
1288 Elf_Internal_Shdr *symtab_hdr;
1289 struct elf_link_hash_entry **sym_hashes;
1290 const Elf_Internal_Rela *rel;
1291 const Elf_Internal_Rela *rel_end;
1294 if (info->relocatable)
1297 BFD_ASSERT (is_i386_elf (abfd));
1299 htab = elf_i386_hash_table (info);
1303 symtab_hdr = &elf_symtab_hdr (abfd);
1304 sym_hashes = elf_sym_hashes (abfd);
1308 rel_end = relocs + sec->reloc_count;
1309 for (rel = relocs; rel < rel_end; rel++)
1311 unsigned int r_type;
1312 unsigned long r_symndx;
1313 struct elf_link_hash_entry *h;
1314 Elf_Internal_Sym *isym;
1317 r_symndx = ELF32_R_SYM (rel->r_info);
1318 r_type = ELF32_R_TYPE (rel->r_info);
1320 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1322 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1328 if (r_symndx < symtab_hdr->sh_info)
1330 /* A local symbol. */
1331 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1336 /* Check relocation against local STT_GNU_IFUNC symbol. */
1337 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1339 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1343 /* Fake a STT_GNU_IFUNC symbol. */
1344 h->type = STT_GNU_IFUNC;
1347 h->forced_local = 1;
1348 h->root.type = bfd_link_hash_defined;
1356 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1357 while (h->root.type == bfd_link_hash_indirect
1358 || h->root.type == bfd_link_hash_warning)
1359 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1364 /* Create the ifunc sections for static executables. If we
1365 never see an indirect function symbol nor we are building
1366 a static executable, those sections will be empty and
1367 won't appear in output. */
1378 if (!_bfd_elf_create_ifunc_sections (abfd, info))
1383 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
1384 it here if it is defined in a non-shared object. */
1385 if (h->type == STT_GNU_IFUNC
1388 /* It is referenced by a non-shared object. */
1392 /* STT_GNU_IFUNC symbol must go through PLT. */
1393 h->plt.refcount += 1;
1395 /* STT_GNU_IFUNC needs dynamic sections. */
1396 if (htab->elf.dynobj == NULL)
1397 htab->elf.dynobj = abfd;
1402 if (h->root.root.string)
1403 name = h->root.root.string;
1405 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1407 (*_bfd_error_handler)
1408 (_("%B: relocation %s against STT_GNU_IFUNC "
1409 "symbol `%s' isn't handled by %s"), abfd,
1410 elf_howto_table[r_type].name,
1411 name, __FUNCTION__);
1412 bfd_set_error (bfd_error_bad_value);
1417 h->pointer_equality_needed = 1;
1420 /* We must copy these reloc types into the
1421 output file. Create a reloc section in
1422 dynobj and make room for this reloc. */
1423 sreloc = _bfd_elf_create_ifunc_dyn_reloc
1424 (abfd, info, sec, sreloc,
1425 &((struct elf_i386_link_hash_entry *) h)->dyn_relocs);
1440 h->got.refcount += 1;
1441 if (htab->elf.sgot == NULL
1442 && !_bfd_elf_create_got_section (htab->elf.dynobj,
1452 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1453 symtab_hdr, sym_hashes,
1454 &r_type, GOT_UNKNOWN,
1455 rel, rel_end, h, r_symndx))
1461 htab->tls_ldm_got.refcount += 1;
1465 /* This symbol requires a procedure linkage table entry. We
1466 actually build the entry in adjust_dynamic_symbol,
1467 because this might be a case of linking PIC code which is
1468 never referenced by a dynamic object, in which case we
1469 don't need to generate a procedure linkage table entry
1472 /* If this is a local symbol, we resolve it directly without
1473 creating a procedure linkage table entry. */
1478 h->plt.refcount += 1;
1481 case R_386_TLS_IE_32:
1483 case R_386_TLS_GOTIE:
1484 if (!info->executable)
1485 info->flags |= DF_STATIC_TLS;
1490 case R_386_TLS_GOTDESC:
1491 case R_386_TLS_DESC_CALL:
1492 /* This symbol requires a global offset table entry. */
1494 int tls_type, old_tls_type;
1499 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1500 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1501 case R_386_TLS_GOTDESC:
1502 case R_386_TLS_DESC_CALL:
1503 tls_type = GOT_TLS_GDESC; break;
1504 case R_386_TLS_IE_32:
1505 if (ELF32_R_TYPE (rel->r_info) == r_type)
1506 tls_type = GOT_TLS_IE_NEG;
1508 /* If this is a GD->IE transition, we may use either of
1509 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1510 tls_type = GOT_TLS_IE;
1513 case R_386_TLS_GOTIE:
1514 tls_type = GOT_TLS_IE_POS; break;
1519 h->got.refcount += 1;
1520 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1524 bfd_signed_vma *local_got_refcounts;
1526 /* This is a global offset table entry for a local symbol. */
1527 local_got_refcounts = elf_local_got_refcounts (abfd);
1528 if (local_got_refcounts == NULL)
1532 size = symtab_hdr->sh_info;
1533 size *= (sizeof (bfd_signed_vma)
1534 + sizeof (bfd_vma) + sizeof(char));
1535 local_got_refcounts = (bfd_signed_vma *)
1536 bfd_zalloc (abfd, size);
1537 if (local_got_refcounts == NULL)
1539 elf_local_got_refcounts (abfd) = local_got_refcounts;
1540 elf_i386_local_tlsdesc_gotent (abfd)
1541 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1542 elf_i386_local_got_tls_type (abfd)
1543 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1545 local_got_refcounts[r_symndx] += 1;
1546 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1549 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1550 tls_type |= old_tls_type;
1551 /* If a TLS symbol is accessed using IE at least once,
1552 there is no point to use dynamic model for it. */
1553 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1554 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1555 || (tls_type & GOT_TLS_IE) == 0))
1557 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1558 tls_type = old_tls_type;
1559 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1560 && GOT_TLS_GD_ANY_P (tls_type))
1561 tls_type |= old_tls_type;
1565 name = h->root.root.string;
1567 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1569 (*_bfd_error_handler)
1570 (_("%B: `%s' accessed both as normal and "
1571 "thread local symbol"),
1577 if (old_tls_type != tls_type)
1580 elf_i386_hash_entry (h)->tls_type = tls_type;
1582 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1590 if (htab->elf.sgot == NULL)
1592 if (htab->elf.dynobj == NULL)
1593 htab->elf.dynobj = abfd;
1594 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1597 if (r_type != R_386_TLS_IE)
1601 case R_386_TLS_LE_32:
1603 if (info->executable)
1605 info->flags |= DF_STATIC_TLS;
1610 if (h != NULL && info->executable)
1612 /* If this reloc is in a read-only section, we might
1613 need a copy reloc. We can't check reliably at this
1614 stage whether the section is read-only, as input
1615 sections have not yet been mapped to output sections.
1616 Tentatively set the flag for now, and correct in
1617 adjust_dynamic_symbol. */
1620 /* We may need a .plt entry if the function this reloc
1621 refers to is in a shared lib. */
1622 h->plt.refcount += 1;
1623 if (r_type != R_386_PC32)
1624 h->pointer_equality_needed = 1;
1627 /* If we are creating a shared library, and this is a reloc
1628 against a global symbol, or a non PC relative reloc
1629 against a local symbol, then we need to copy the reloc
1630 into the shared library. However, if we are linking with
1631 -Bsymbolic, we do not need to copy a reloc against a
1632 global symbol which is defined in an object we are
1633 including in the link (i.e., DEF_REGULAR is set). At
1634 this point we have not seen all the input files, so it is
1635 possible that DEF_REGULAR is not set now but will be set
1636 later (it is never cleared). In case of a weak definition,
1637 DEF_REGULAR may be cleared later by a strong definition in
1638 a shared library. We account for that possibility below by
1639 storing information in the relocs_copied field of the hash
1640 table entry. A similar situation occurs when creating
1641 shared libraries and symbol visibility changes render the
1644 If on the other hand, we are creating an executable, we
1645 may need to keep relocations for symbols satisfied by a
1646 dynamic library if we manage to avoid copy relocs for the
1649 && (sec->flags & SEC_ALLOC) != 0
1650 && (r_type != R_386_PC32
1652 && (! SYMBOLIC_BIND (info, h)
1653 || h->root.type == bfd_link_hash_defweak
1654 || !h->def_regular))))
1655 || (ELIMINATE_COPY_RELOCS
1657 && (sec->flags & SEC_ALLOC) != 0
1659 && (h->root.type == bfd_link_hash_defweak
1660 || !h->def_regular)))
1662 struct elf_dyn_relocs *p;
1663 struct elf_dyn_relocs **head;
1665 /* We must copy these reloc types into the output file.
1666 Create a reloc section in dynobj and make room for
1670 if (htab->elf.dynobj == NULL)
1671 htab->elf.dynobj = abfd;
1673 sreloc = _bfd_elf_make_dynamic_reloc_section
1674 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1680 /* If this is a global symbol, we count the number of
1681 relocations we need for this symbol. */
1684 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
1688 /* Track dynamic relocs needed for local syms too.
1689 We really need local syms available to do this
1694 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1699 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1703 vpp = &elf_section_data (s)->local_dynrel;
1704 head = (struct elf_dyn_relocs **)vpp;
1708 if (p == NULL || p->sec != sec)
1710 bfd_size_type amt = sizeof *p;
1711 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1723 if (r_type == R_386_PC32)
1728 /* This relocation describes the C++ object vtable hierarchy.
1729 Reconstruct it for later use during GC. */
1730 case R_386_GNU_VTINHERIT:
1731 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1735 /* This relocation describes which C++ vtable entries are actually
1736 used. Record for later use during GC. */
1737 case R_386_GNU_VTENTRY:
1738 BFD_ASSERT (h != NULL);
1740 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1752 /* Return the section that should be marked against GC for a given
1756 elf_i386_gc_mark_hook (asection *sec,
1757 struct bfd_link_info *info,
1758 Elf_Internal_Rela *rel,
1759 struct elf_link_hash_entry *h,
1760 Elf_Internal_Sym *sym)
1763 switch (ELF32_R_TYPE (rel->r_info))
1765 case R_386_GNU_VTINHERIT:
1766 case R_386_GNU_VTENTRY:
1770 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1773 /* Update the got entry reference counts for the section being removed. */
1776 elf_i386_gc_sweep_hook (bfd *abfd,
1777 struct bfd_link_info *info,
1779 const Elf_Internal_Rela *relocs)
1781 struct elf_i386_link_hash_table *htab;
1782 Elf_Internal_Shdr *symtab_hdr;
1783 struct elf_link_hash_entry **sym_hashes;
1784 bfd_signed_vma *local_got_refcounts;
1785 const Elf_Internal_Rela *rel, *relend;
1787 if (info->relocatable)
1790 htab = elf_i386_hash_table (info);
1794 elf_section_data (sec)->local_dynrel = NULL;
1796 symtab_hdr = &elf_symtab_hdr (abfd);
1797 sym_hashes = elf_sym_hashes (abfd);
1798 local_got_refcounts = elf_local_got_refcounts (abfd);
1800 relend = relocs + sec->reloc_count;
1801 for (rel = relocs; rel < relend; rel++)
1803 unsigned long r_symndx;
1804 unsigned int r_type;
1805 struct elf_link_hash_entry *h = NULL;
1807 r_symndx = ELF32_R_SYM (rel->r_info);
1808 if (r_symndx >= symtab_hdr->sh_info)
1810 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1811 while (h->root.type == bfd_link_hash_indirect
1812 || h->root.type == bfd_link_hash_warning)
1813 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1817 /* A local symbol. */
1818 Elf_Internal_Sym *isym;
1820 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1823 /* Check relocation against local STT_GNU_IFUNC symbol. */
1825 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1827 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
1835 struct elf_i386_link_hash_entry *eh;
1836 struct elf_dyn_relocs **pp;
1837 struct elf_dyn_relocs *p;
1839 eh = (struct elf_i386_link_hash_entry *) h;
1840 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1843 /* Everything must go for SEC. */
1849 r_type = ELF32_R_TYPE (rel->r_info);
1850 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1851 symtab_hdr, sym_hashes,
1852 &r_type, GOT_UNKNOWN,
1853 rel, relend, h, r_symndx))
1859 if (htab->tls_ldm_got.refcount > 0)
1860 htab->tls_ldm_got.refcount -= 1;
1864 case R_386_TLS_GOTDESC:
1865 case R_386_TLS_DESC_CALL:
1866 case R_386_TLS_IE_32:
1868 case R_386_TLS_GOTIE:
1872 if (h->got.refcount > 0)
1873 h->got.refcount -= 1;
1874 if (h->type == STT_GNU_IFUNC)
1876 if (h->plt.refcount > 0)
1877 h->plt.refcount -= 1;
1880 else if (local_got_refcounts != NULL)
1882 if (local_got_refcounts[r_symndx] > 0)
1883 local_got_refcounts[r_symndx] -= 1;
1890 && (h == NULL || h->type != STT_GNU_IFUNC))
1897 if (h->plt.refcount > 0)
1898 h->plt.refcount -= 1;
1903 if (h != NULL && h->type == STT_GNU_IFUNC)
1905 if (h->got.refcount > 0)
1906 h->got.refcount -= 1;
1907 if (h->plt.refcount > 0)
1908 h->plt.refcount -= 1;
1920 /* Adjust a symbol defined by a dynamic object and referenced by a
1921 regular object. The current definition is in some section of the
1922 dynamic object, but we're not including those sections. We have to
1923 change the definition to something the rest of the link can
1927 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1928 struct elf_link_hash_entry *h)
1930 struct elf_i386_link_hash_table *htab;
1933 /* STT_GNU_IFUNC symbol must go through PLT. */
1934 if (h->type == STT_GNU_IFUNC)
1936 if (h->plt.refcount <= 0)
1938 h->plt.offset = (bfd_vma) -1;
1944 /* If this is a function, put it in the procedure linkage table. We
1945 will fill in the contents of the procedure linkage table later,
1946 when we know the address of the .got section. */
1947 if (h->type == STT_FUNC
1950 if (h->plt.refcount <= 0
1951 || SYMBOL_CALLS_LOCAL (info, h)
1952 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1953 && h->root.type == bfd_link_hash_undefweak))
1955 /* This case can occur if we saw a PLT32 reloc in an input
1956 file, but the symbol was never referred to by a dynamic
1957 object, or if all references were garbage collected. In
1958 such a case, we don't actually need to build a procedure
1959 linkage table, and we can just do a PC32 reloc instead. */
1960 h->plt.offset = (bfd_vma) -1;
1967 /* It's possible that we incorrectly decided a .plt reloc was
1968 needed for an R_386_PC32 reloc to a non-function sym in
1969 check_relocs. We can't decide accurately between function and
1970 non-function syms in check-relocs; Objects loaded later in
1971 the link may change h->type. So fix it now. */
1972 h->plt.offset = (bfd_vma) -1;
1974 /* If this is a weak symbol, and there is a real definition, the
1975 processor independent code will have arranged for us to see the
1976 real definition first, and we can just use the same value. */
1977 if (h->u.weakdef != NULL)
1979 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1980 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1981 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1982 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1983 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1984 h->non_got_ref = h->u.weakdef->non_got_ref;
1988 /* This is a reference to a symbol defined by a dynamic object which
1989 is not a function. */
1991 /* If we are creating a shared library, we must presume that the
1992 only references to the symbol are via the global offset table.
1993 For such cases we need not do anything here; the relocations will
1994 be handled correctly by relocate_section. */
1998 /* If there are no references to this symbol that do not use the
1999 GOT, we don't need to generate a copy reloc. */
2000 if (!h->non_got_ref)
2003 /* If -z nocopyreloc was given, we won't generate them either. */
2004 if (info->nocopyreloc)
2010 htab = elf_i386_hash_table (info);
2014 /* If there aren't any dynamic relocs in read-only sections, then
2015 we can keep the dynamic relocs and avoid the copy reloc. This
2016 doesn't work on VxWorks, where we can not have dynamic relocations
2017 (other than copy and jump slot relocations) in an executable. */
2018 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
2020 struct elf_i386_link_hash_entry * eh;
2021 struct elf_dyn_relocs *p;
2023 eh = (struct elf_i386_link_hash_entry *) h;
2024 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2026 s = p->sec->output_section;
2027 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2040 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
2041 h->root.root.string);
2045 /* We must allocate the symbol in our .dynbss section, which will
2046 become part of the .bss section of the executable. There will be
2047 an entry for this symbol in the .dynsym section. The dynamic
2048 object will contain position independent code, so all references
2049 from the dynamic object to this symbol will go through the global
2050 offset table. The dynamic linker will use the .dynsym entry to
2051 determine the address it must put in the global offset table, so
2052 both the dynamic object and the regular object will refer to the
2053 same memory location for the variable. */
2055 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2056 copy the initial value out of the dynamic object and into the
2057 runtime process image. */
2058 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2060 htab->srelbss->size += sizeof (Elf32_External_Rel);
2066 return _bfd_elf_adjust_dynamic_copy (h, s);
2069 /* Allocate space in .plt, .got and associated reloc sections for
2073 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2075 struct bfd_link_info *info;
2076 struct elf_i386_link_hash_table *htab;
2077 struct elf_i386_link_hash_entry *eh;
2078 struct elf_dyn_relocs *p;
2080 if (h->root.type == bfd_link_hash_indirect)
2083 if (h->root.type == bfd_link_hash_warning)
2084 /* When warning symbols are created, they **replace** the "real"
2085 entry in the hash table, thus we never get to see the real
2086 symbol in a hash traversal. So look at it now. */
2087 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2088 eh = (struct elf_i386_link_hash_entry *) h;
2090 info = (struct bfd_link_info *) inf;
2091 htab = elf_i386_hash_table (info);
2095 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2096 here if it is defined and referenced in a non-shared object. */
2097 if (h->type == STT_GNU_IFUNC
2099 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h,
2102 else if (htab->elf.dynamic_sections_created
2103 && h->plt.refcount > 0)
2105 /* Make sure this symbol is output as a dynamic symbol.
2106 Undefined weak syms won't yet be marked as dynamic. */
2107 if (h->dynindx == -1
2108 && !h->forced_local)
2110 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2115 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2117 asection *s = htab->elf.splt;
2119 /* If this is the first .plt entry, make room for the special
2122 s->size += PLT_ENTRY_SIZE;
2124 h->plt.offset = s->size;
2126 /* If this symbol is not defined in a regular file, and we are
2127 not generating a shared library, then set the symbol to this
2128 location in the .plt. This is required to make function
2129 pointers compare as equal between the normal executable and
2130 the shared library. */
2134 h->root.u.def.section = s;
2135 h->root.u.def.value = h->plt.offset;
2138 /* Make room for this entry. */
2139 s->size += PLT_ENTRY_SIZE;
2141 /* We also need to make an entry in the .got.plt section, which
2142 will be placed in the .got section by the linker script. */
2143 htab->elf.sgotplt->size += 4;
2145 /* We also need to make an entry in the .rel.plt section. */
2146 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2147 htab->next_tls_desc_index++;
2149 if (htab->is_vxworks && !info->shared)
2151 /* VxWorks has a second set of relocations for each PLT entry
2152 in executables. They go in a separate relocation section,
2153 which is processed by the kernel loader. */
2155 /* There are two relocations for the initial PLT entry: an
2156 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2157 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2159 if (h->plt.offset == PLT_ENTRY_SIZE)
2160 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2162 /* There are two extra relocations for each subsequent PLT entry:
2163 an R_386_32 relocation for the GOT entry, and an R_386_32
2164 relocation for the PLT entry. */
2166 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2171 h->plt.offset = (bfd_vma) -1;
2177 h->plt.offset = (bfd_vma) -1;
2181 eh->tlsdesc_got = (bfd_vma) -1;
2183 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2184 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2185 if (h->got.refcount > 0
2188 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2189 h->got.offset = (bfd_vma) -1;
2190 else if (h->got.refcount > 0)
2194 int tls_type = elf_i386_hash_entry(h)->tls_type;
2196 /* Make sure this symbol is output as a dynamic symbol.
2197 Undefined weak syms won't yet be marked as dynamic. */
2198 if (h->dynindx == -1
2199 && !h->forced_local)
2201 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2206 if (GOT_TLS_GDESC_P (tls_type))
2208 eh->tlsdesc_got = htab->elf.sgotplt->size
2209 - elf_i386_compute_jump_table_size (htab);
2210 htab->elf.sgotplt->size += 8;
2211 h->got.offset = (bfd_vma) -2;
2213 if (! GOT_TLS_GDESC_P (tls_type)
2214 || GOT_TLS_GD_P (tls_type))
2216 h->got.offset = s->size;
2218 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2219 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2222 dyn = htab->elf.dynamic_sections_created;
2223 /* R_386_TLS_IE_32 needs one dynamic relocation,
2224 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2225 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2226 need two), R_386_TLS_GD needs one if local symbol and two if
2228 if (tls_type == GOT_TLS_IE_BOTH)
2229 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2230 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2231 || (tls_type & GOT_TLS_IE))
2232 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2233 else if (GOT_TLS_GD_P (tls_type))
2234 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2235 else if (! GOT_TLS_GDESC_P (tls_type)
2236 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2237 || h->root.type != bfd_link_hash_undefweak)
2239 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2240 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2241 if (GOT_TLS_GDESC_P (tls_type))
2242 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2245 h->got.offset = (bfd_vma) -1;
2247 if (eh->dyn_relocs == NULL)
2250 /* In the shared -Bsymbolic case, discard space allocated for
2251 dynamic pc-relative relocs against symbols which turn out to be
2252 defined in regular objects. For the normal shared case, discard
2253 space for pc-relative relocs that have become local due to symbol
2254 visibility changes. */
2258 /* The only reloc that uses pc_count is R_386_PC32, which will
2259 appear on a call or on something like ".long foo - .". We
2260 want calls to protected symbols to resolve directly to the
2261 function rather than going via the plt. If people want
2262 function pointer comparisons to work as expected then they
2263 should avoid writing assembly like ".long foo - .". */
2264 if (SYMBOL_CALLS_LOCAL (info, h))
2266 struct elf_dyn_relocs **pp;
2268 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2270 p->count -= p->pc_count;
2279 if (htab->is_vxworks)
2281 struct elf_dyn_relocs **pp;
2282 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2284 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2291 /* Also discard relocs on undefined weak syms with non-default
2293 if (eh->dyn_relocs != NULL
2294 && h->root.type == bfd_link_hash_undefweak)
2296 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2297 eh->dyn_relocs = NULL;
2299 /* Make sure undefined weak symbols are output as a dynamic
2301 else if (h->dynindx == -1
2302 && !h->forced_local)
2304 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2309 else if (ELIMINATE_COPY_RELOCS)
2311 /* For the non-shared case, discard space for relocs against
2312 symbols which turn out to need copy relocs or are not
2318 || (htab->elf.dynamic_sections_created
2319 && (h->root.type == bfd_link_hash_undefweak
2320 || h->root.type == bfd_link_hash_undefined))))
2322 /* Make sure this symbol is output as a dynamic symbol.
2323 Undefined weak syms won't yet be marked as dynamic. */
2324 if (h->dynindx == -1
2325 && !h->forced_local)
2327 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2331 /* If that succeeded, we know we'll be keeping all the
2333 if (h->dynindx != -1)
2337 eh->dyn_relocs = NULL;
2342 /* Finally, allocate space. */
2343 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2347 sreloc = elf_section_data (p->sec)->sreloc;
2349 BFD_ASSERT (sreloc != NULL);
2350 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2356 /* Allocate space in .plt, .got and associated reloc sections for
2357 local dynamic relocs. */
2360 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2362 struct elf_link_hash_entry *h
2363 = (struct elf_link_hash_entry *) *slot;
2365 if (h->type != STT_GNU_IFUNC
2369 || h->root.type != bfd_link_hash_defined)
2372 return elf_i386_allocate_dynrelocs (h, inf);
2375 /* Find any dynamic relocs that apply to read-only sections. */
2378 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2380 struct elf_i386_link_hash_entry *eh;
2381 struct elf_dyn_relocs *p;
2383 if (h->root.type == bfd_link_hash_warning)
2384 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2386 eh = (struct elf_i386_link_hash_entry *) h;
2387 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2389 asection *s = p->sec->output_section;
2391 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2393 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2395 info->flags |= DF_TEXTREL;
2397 /* Not an error, just cut short the traversal. */
2404 /* Set the sizes of the dynamic sections. */
2407 elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
2408 struct bfd_link_info *info)
2410 struct elf_i386_link_hash_table *htab;
2416 htab = elf_i386_hash_table (info);
2419 dynobj = htab->elf.dynobj;
2423 if (htab->elf.dynamic_sections_created)
2425 /* Set the contents of the .interp section to the interpreter. */
2426 if (info->executable)
2428 s = bfd_get_section_by_name (dynobj, ".interp");
2431 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2432 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2436 /* Set up .got offsets for local syms, and space for local dynamic
2438 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2440 bfd_signed_vma *local_got;
2441 bfd_signed_vma *end_local_got;
2442 char *local_tls_type;
2443 bfd_vma *local_tlsdesc_gotent;
2444 bfd_size_type locsymcount;
2445 Elf_Internal_Shdr *symtab_hdr;
2448 if (! is_i386_elf (ibfd))
2451 for (s = ibfd->sections; s != NULL; s = s->next)
2453 struct elf_dyn_relocs *p;
2455 for (p = ((struct elf_dyn_relocs *)
2456 elf_section_data (s)->local_dynrel);
2460 if (!bfd_is_abs_section (p->sec)
2461 && bfd_is_abs_section (p->sec->output_section))
2463 /* Input section has been discarded, either because
2464 it is a copy of a linkonce section or due to
2465 linker script /DISCARD/, so we'll be discarding
2468 else if (htab->is_vxworks
2469 && strcmp (p->sec->output_section->name,
2472 /* Relocations in vxworks .tls_vars sections are
2473 handled specially by the loader. */
2475 else if (p->count != 0)
2477 srel = elf_section_data (p->sec)->sreloc;
2478 srel->size += p->count * sizeof (Elf32_External_Rel);
2479 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2480 info->flags |= DF_TEXTREL;
2485 local_got = elf_local_got_refcounts (ibfd);
2489 symtab_hdr = &elf_symtab_hdr (ibfd);
2490 locsymcount = symtab_hdr->sh_info;
2491 end_local_got = local_got + locsymcount;
2492 local_tls_type = elf_i386_local_got_tls_type (ibfd);
2493 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
2495 srel = htab->elf.srelgot;
2496 for (; local_got < end_local_got;
2497 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
2499 *local_tlsdesc_gotent = (bfd_vma) -1;
2502 if (GOT_TLS_GDESC_P (*local_tls_type))
2504 *local_tlsdesc_gotent = htab->elf.sgotplt->size
2505 - elf_i386_compute_jump_table_size (htab);
2506 htab->elf.sgotplt->size += 8;
2507 *local_got = (bfd_vma) -2;
2509 if (! GOT_TLS_GDESC_P (*local_tls_type)
2510 || GOT_TLS_GD_P (*local_tls_type))
2512 *local_got = s->size;
2514 if (GOT_TLS_GD_P (*local_tls_type)
2515 || *local_tls_type == GOT_TLS_IE_BOTH)
2519 || GOT_TLS_GD_ANY_P (*local_tls_type)
2520 || (*local_tls_type & GOT_TLS_IE))
2522 if (*local_tls_type == GOT_TLS_IE_BOTH)
2523 srel->size += 2 * sizeof (Elf32_External_Rel);
2524 else if (GOT_TLS_GD_P (*local_tls_type)
2525 || ! GOT_TLS_GDESC_P (*local_tls_type))
2526 srel->size += sizeof (Elf32_External_Rel);
2527 if (GOT_TLS_GDESC_P (*local_tls_type))
2528 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2532 *local_got = (bfd_vma) -1;
2536 if (htab->tls_ldm_got.refcount > 0)
2538 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2540 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2541 htab->elf.sgot->size += 8;
2542 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2545 htab->tls_ldm_got.offset = -1;
2547 /* Allocate global sym .plt and .got entries, and space for global
2548 sym dynamic relocs. */
2549 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
2551 /* Allocate .plt and .got entries, and space for local symbols. */
2552 htab_traverse (htab->loc_hash_table,
2553 elf_i386_allocate_local_dynrelocs,
2556 /* For every jump slot reserved in the sgotplt, reloc_count is
2557 incremented. However, when we reserve space for TLS descriptors,
2558 it's not incremented, so in order to compute the space reserved
2559 for them, it suffices to multiply the reloc count by the jump
2561 if (htab->elf.srelplt)
2562 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
2564 if (htab->elf.sgotplt)
2566 struct elf_link_hash_entry *got;
2567 got = elf_link_hash_lookup (elf_hash_table (info),
2568 "_GLOBAL_OFFSET_TABLE_",
2569 FALSE, FALSE, FALSE);
2571 /* Don't allocate .got.plt section if there are no GOT nor PLT
2572 entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */
2574 || !got->ref_regular_nonweak)
2575 && (htab->elf.sgotplt->size
2576 == get_elf_backend_data (output_bfd)->got_header_size)
2577 && (htab->elf.splt == NULL
2578 || htab->elf.splt->size == 0)
2579 && (htab->elf.sgot == NULL
2580 || htab->elf.sgot->size == 0)
2581 && (htab->elf.iplt == NULL
2582 || htab->elf.iplt->size == 0)
2583 && (htab->elf.igotplt == NULL
2584 || htab->elf.igotplt->size == 0))
2585 htab->elf.sgotplt->size = 0;
2588 /* We now have determined the sizes of the various dynamic sections.
2589 Allocate memory for them. */
2591 for (s = dynobj->sections; s != NULL; s = s->next)
2593 bfd_boolean strip_section = TRUE;
2595 if ((s->flags & SEC_LINKER_CREATED) == 0)
2598 if (s == htab->elf.splt
2599 || s == htab->elf.sgot
2600 || s == htab->elf.sgotplt
2601 || s == htab->elf.iplt
2602 || s == htab->elf.igotplt
2603 || s == htab->sdynbss)
2605 /* Strip this section if we don't need it; see the
2607 /* We'd like to strip these sections if they aren't needed, but if
2608 we've exported dynamic symbols from them we must leave them.
2609 It's too late to tell BFD to get rid of the symbols. */
2611 if (htab->elf.hplt != NULL)
2612 strip_section = FALSE;
2614 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
2617 && s != htab->elf.srelplt
2618 && s != htab->srelplt2)
2621 /* We use the reloc_count field as a counter if we need
2622 to copy relocs into the output file. */
2627 /* It's not one of our sections, so don't allocate space. */
2633 /* If we don't need this section, strip it from the
2634 output file. This is mostly to handle .rel.bss and
2635 .rel.plt. We must create both sections in
2636 create_dynamic_sections, because they must be created
2637 before the linker maps input sections to output
2638 sections. The linker does that before
2639 adjust_dynamic_symbol is called, and it is that
2640 function which decides whether anything needs to go
2641 into these sections. */
2643 s->flags |= SEC_EXCLUDE;
2647 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2650 /* Allocate memory for the section contents. We use bfd_zalloc
2651 here in case unused entries are not reclaimed before the
2652 section's contents are written out. This should not happen,
2653 but this way if it does, we get a R_386_NONE reloc instead
2655 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
2656 if (s->contents == NULL)
2660 if (htab->elf.dynamic_sections_created)
2662 /* Add some entries to the .dynamic section. We fill in the
2663 values later, in elf_i386_finish_dynamic_sections, but we
2664 must add the entries now so that we get the correct size for
2665 the .dynamic section. The DT_DEBUG entry is filled in by the
2666 dynamic linker and used by the debugger. */
2667 #define add_dynamic_entry(TAG, VAL) \
2668 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2670 if (info->executable)
2672 if (!add_dynamic_entry (DT_DEBUG, 0))
2676 if (htab->elf.splt->size != 0)
2678 if (!add_dynamic_entry (DT_PLTGOT, 0)
2679 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2680 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2681 || !add_dynamic_entry (DT_JMPREL, 0))
2687 if (!add_dynamic_entry (DT_REL, 0)
2688 || !add_dynamic_entry (DT_RELSZ, 0)
2689 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
2692 /* If any dynamic relocs apply to a read-only section,
2693 then we need a DT_TEXTREL entry. */
2694 if ((info->flags & DF_TEXTREL) == 0)
2695 elf_link_hash_traverse (&htab->elf,
2696 elf_i386_readonly_dynrelocs, info);
2698 if ((info->flags & DF_TEXTREL) != 0)
2700 if (!add_dynamic_entry (DT_TEXTREL, 0))
2704 if (htab->is_vxworks
2705 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
2708 #undef add_dynamic_entry
2714 elf_i386_always_size_sections (bfd *output_bfd,
2715 struct bfd_link_info *info)
2717 asection *tls_sec = elf_hash_table (info)->tls_sec;
2721 struct elf_link_hash_entry *tlsbase;
2723 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2724 "_TLS_MODULE_BASE_",
2725 FALSE, FALSE, FALSE);
2727 if (tlsbase && tlsbase->type == STT_TLS)
2729 struct elf_i386_link_hash_table *htab;
2730 struct bfd_link_hash_entry *bh = NULL;
2731 const struct elf_backend_data *bed
2732 = get_elf_backend_data (output_bfd);
2734 htab = elf_i386_hash_table (info);
2738 if (!(_bfd_generic_link_add_one_symbol
2739 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2740 tls_sec, 0, NULL, FALSE,
2741 bed->collect, &bh)))
2744 htab->tls_module_base = bh;
2746 tlsbase = (struct elf_link_hash_entry *)bh;
2747 tlsbase->def_regular = 1;
2748 tlsbase->other = STV_HIDDEN;
2749 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2756 /* Set the correct type for an x86 ELF section. We do this by the
2757 section name, which is a hack, but ought to work. */
2760 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2761 Elf_Internal_Shdr *hdr,
2766 name = bfd_get_section_name (abfd, sec);
2768 /* This is an ugly, but unfortunately necessary hack that is
2769 needed when producing EFI binaries on x86. It tells
2770 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2771 containing ELF relocation info. We need this hack in order to
2772 be able to generate ELF binaries that can be translated into
2773 EFI applications (which are essentially COFF objects). Those
2774 files contain a COFF ".reloc" section inside an ELFNN object,
2775 which would normally cause BFD to segfault because it would
2776 attempt to interpret this section as containing relocation
2777 entries for section "oc". With this hack enabled, ".reloc"
2778 will be treated as a normal data section, which will avoid the
2779 segfault. However, you won't be able to create an ELFNN binary
2780 with a section named "oc" that needs relocations, but that's
2781 the kind of ugly side-effects you get when detecting section
2782 types based on their names... In practice, this limitation is
2783 unlikely to bite. */
2784 if (strcmp (name, ".reloc") == 0)
2785 hdr->sh_type = SHT_PROGBITS;
2790 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
2791 executables. Rather than setting it to the beginning of the TLS
2792 section, we have to set it to the end. This function may be called
2793 multiple times, it is idempotent. */
2796 elf_i386_set_tls_module_base (struct bfd_link_info *info)
2798 struct elf_i386_link_hash_table *htab;
2799 struct bfd_link_hash_entry *base;
2801 if (!info->executable)
2804 htab = elf_i386_hash_table (info);
2808 base = htab->tls_module_base;
2812 base->u.def.value = htab->elf.tls_size;
2815 /* Return the base VMA address which should be subtracted from real addresses
2816 when resolving @dtpoff relocation.
2817 This is PT_TLS segment p_vaddr. */
2820 elf_i386_dtpoff_base (struct bfd_link_info *info)
2822 /* If tls_sec is NULL, we should have signalled an error already. */
2823 if (elf_hash_table (info)->tls_sec == NULL)
2825 return elf_hash_table (info)->tls_sec->vma;
2828 /* Return the relocation value for @tpoff relocation
2829 if STT_TLS virtual address is ADDRESS. */
2832 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
2834 struct elf_link_hash_table *htab = elf_hash_table (info);
2835 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
2836 bfd_vma static_tls_size;
2838 /* If tls_sec is NULL, we should have signalled an error already. */
2839 if (htab->tls_sec == NULL)
2842 /* Consider special static TLS alignment requirements. */
2843 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
2844 return static_tls_size + htab->tls_sec->vma - address;
2847 /* Relocate an i386 ELF section. */
2850 elf_i386_relocate_section (bfd *output_bfd,
2851 struct bfd_link_info *info,
2853 asection *input_section,
2855 Elf_Internal_Rela *relocs,
2856 Elf_Internal_Sym *local_syms,
2857 asection **local_sections)
2859 struct elf_i386_link_hash_table *htab;
2860 Elf_Internal_Shdr *symtab_hdr;
2861 struct elf_link_hash_entry **sym_hashes;
2862 bfd_vma *local_got_offsets;
2863 bfd_vma *local_tlsdesc_gotents;
2864 Elf_Internal_Rela *rel;
2865 Elf_Internal_Rela *relend;
2866 bfd_boolean is_vxworks_tls;
2868 BFD_ASSERT (is_i386_elf (input_bfd));
2870 htab = elf_i386_hash_table (info);
2873 symtab_hdr = &elf_symtab_hdr (input_bfd);
2874 sym_hashes = elf_sym_hashes (input_bfd);
2875 local_got_offsets = elf_local_got_offsets (input_bfd);
2876 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
2877 /* We have to handle relocations in vxworks .tls_vars sections
2878 specially, because the dynamic loader is 'weird'. */
2879 is_vxworks_tls = (htab->is_vxworks && info->shared
2880 && !strcmp (input_section->output_section->name,
2883 elf_i386_set_tls_module_base (info);
2886 relend = relocs + input_section->reloc_count;
2887 for (; rel < relend; rel++)
2889 unsigned int r_type;
2890 reloc_howto_type *howto;
2891 unsigned long r_symndx;
2892 struct elf_link_hash_entry *h;
2893 Elf_Internal_Sym *sym;
2895 bfd_vma off, offplt;
2897 bfd_boolean unresolved_reloc;
2898 bfd_reloc_status_type r;
2902 r_type = ELF32_R_TYPE (rel->r_info);
2903 if (r_type == R_386_GNU_VTINHERIT
2904 || r_type == R_386_GNU_VTENTRY)
2907 if ((indx = r_type) >= R_386_standard
2908 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2909 >= R_386_ext - R_386_standard)
2910 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2911 >= R_386_irelative - R_386_ext))
2913 (*_bfd_error_handler)
2914 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2915 input_bfd, input_section, r_type);
2916 bfd_set_error (bfd_error_bad_value);
2919 howto = elf_howto_table + indx;
2921 r_symndx = ELF32_R_SYM (rel->r_info);
2925 unresolved_reloc = FALSE;
2926 if (r_symndx < symtab_hdr->sh_info)
2928 sym = local_syms + r_symndx;
2929 sec = local_sections[r_symndx];
2930 relocation = (sec->output_section->vma
2931 + sec->output_offset
2934 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
2935 && ((sec->flags & SEC_MERGE) != 0
2936 || (info->relocatable
2937 && sec->output_offset != 0)))
2940 bfd_byte *where = contents + rel->r_offset;
2942 switch (howto->size)
2945 addend = bfd_get_8 (input_bfd, where);
2946 if (howto->pc_relative)
2948 addend = (addend ^ 0x80) - 0x80;
2953 addend = bfd_get_16 (input_bfd, where);
2954 if (howto->pc_relative)
2956 addend = (addend ^ 0x8000) - 0x8000;
2961 addend = bfd_get_32 (input_bfd, where);
2962 if (howto->pc_relative)
2964 addend = (addend ^ 0x80000000) - 0x80000000;
2972 if (info->relocatable)
2973 addend += sec->output_offset;
2976 asection *msec = sec;
2977 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
2979 addend -= relocation;
2980 addend += msec->output_section->vma + msec->output_offset;
2983 switch (howto->size)
2986 /* FIXME: overflow checks. */
2987 if (howto->pc_relative)
2989 bfd_put_8 (input_bfd, addend, where);
2992 if (howto->pc_relative)
2994 bfd_put_16 (input_bfd, addend, where);
2997 if (howto->pc_relative)
2999 bfd_put_32 (input_bfd, addend, where);
3003 else if (!info->relocatable
3004 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3006 /* Relocate against local STT_GNU_IFUNC symbol. */
3007 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3012 /* Set STT_GNU_IFUNC symbol value. */
3013 h->root.u.def.value = sym->st_value;
3014 h->root.u.def.section = sec;
3019 bfd_boolean warned ATTRIBUTE_UNUSED;
3021 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3022 r_symndx, symtab_hdr, sym_hashes,
3024 unresolved_reloc, warned);
3027 if (sec != NULL && elf_discarded_section (sec))
3028 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
3029 rel, relend, howto, contents);
3031 if (info->relocatable)
3034 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3035 it here if it is defined in a non-shared object. */
3037 && h->type == STT_GNU_IFUNC
3040 asection *plt, *gotplt, *base_got;
3044 if ((input_section->flags & SEC_ALLOC) == 0
3045 || h->plt.offset == (bfd_vma) -1)
3048 /* STT_GNU_IFUNC symbol must go through PLT. */
3049 if (htab->elf.splt != NULL)
3051 plt = htab->elf.splt;
3052 gotplt = htab->elf.sgotplt;
3056 plt = htab->elf.iplt;
3057 gotplt = htab->elf.igotplt;
3060 relocation = (plt->output_section->vma
3061 + plt->output_offset + h->plt.offset);
3066 if (h->root.root.string)
3067 name = h->root.root.string;
3069 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3071 (*_bfd_error_handler)
3072 (_("%B: relocation %s against STT_GNU_IFUNC "
3073 "symbol `%s' isn't handled by %s"), input_bfd,
3074 elf_howto_table[r_type].name,
3075 name, __FUNCTION__);
3076 bfd_set_error (bfd_error_bad_value);
3080 /* Generate dynamic relcoation only when there is a
3081 non-GOF reference in a shared object. */
3082 if (info->shared && h->non_got_ref)
3084 Elf_Internal_Rela outrel;
3089 /* Need a dynamic relocation to get the real function
3091 offset = _bfd_elf_section_offset (output_bfd,
3095 if (offset == (bfd_vma) -1
3096 || offset == (bfd_vma) -2)
3099 outrel.r_offset = (input_section->output_section->vma
3100 + input_section->output_offset
3103 if (h->dynindx == -1
3105 || info->executable)
3107 /* This symbol is resolved locally. */
3108 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
3109 bfd_put_32 (output_bfd,
3110 (h->root.u.def.value
3111 + h->root.u.def.section->output_section->vma
3112 + h->root.u.def.section->output_offset),
3116 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3118 sreloc = htab->elf.irelifunc;
3119 loc = sreloc->contents;
3120 loc += (sreloc->reloc_count++
3121 * sizeof (Elf32_External_Rel));
3122 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3124 /* If this reloc is against an external symbol, we
3125 do not want to fiddle with the addend. Otherwise,
3126 we need to include the symbol value so that it
3127 becomes an addend for the dynamic reloc. For an
3128 internal symbol, we have updated addend. */
3137 base_got = htab->elf.sgot;
3138 off = h->got.offset;
3140 if (base_got == NULL)
3143 if (off == (bfd_vma) -1)
3145 /* We can't use h->got.offset here to save state, or
3146 even just remember the offset, as finish_dynamic_symbol
3147 would use that as offset into .got. */
3149 if (htab->elf.splt != NULL)
3151 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3152 off = (plt_index + 3) * 4;
3153 base_got = htab->elf.sgotplt;
3157 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
3158 off = plt_index * 4;
3159 base_got = htab->elf.igotplt;
3162 if (h->dynindx == -1
3166 /* This references the local defitionion. We must
3167 initialize this entry in the global offset table.
3168 Since the offset must always be a multiple of 8,
3169 we use the least significant bit to record
3170 whether we have initialized it already.
3172 When doing a dynamic link, we create a .rela.got
3173 relocation entry to initialize the value. This
3174 is done in the finish_dynamic_symbol routine. */
3179 bfd_put_32 (output_bfd, relocation,
3180 base_got->contents + off);
3187 /* Adjust for static executables. */
3188 if (htab->elf.splt == NULL)
3189 relocation += gotplt->output_offset;
3193 relocation = (base_got->output_section->vma
3194 + base_got->output_offset + off
3195 - gotplt->output_section->vma
3196 - gotplt->output_offset);
3197 /* Adjust for static executables. */
3198 if (htab->elf.splt == NULL)
3199 relocation += gotplt->output_offset;
3205 relocation -= (gotplt->output_section->vma
3206 + gotplt->output_offset);
3214 /* Relocation is to the entry for this symbol in the global
3216 if (htab->elf.sgot == NULL)
3223 off = h->got.offset;
3224 dyn = htab->elf.dynamic_sections_created;
3225 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
3227 && SYMBOL_REFERENCES_LOCAL (info, h))
3228 || (ELF_ST_VISIBILITY (h->other)
3229 && h->root.type == bfd_link_hash_undefweak))
3231 /* This is actually a static link, or it is a
3232 -Bsymbolic link and the symbol is defined
3233 locally, or the symbol was forced to be local
3234 because of a version file. We must initialize
3235 this entry in the global offset table. Since the
3236 offset must always be a multiple of 4, we use the
3237 least significant bit to record whether we have
3238 initialized it already.
3240 When doing a dynamic link, we create a .rel.got
3241 relocation entry to initialize the value. This
3242 is done in the finish_dynamic_symbol routine. */
3247 bfd_put_32 (output_bfd, relocation,
3248 htab->elf.sgot->contents + off);
3253 unresolved_reloc = FALSE;
3257 if (local_got_offsets == NULL)
3260 off = local_got_offsets[r_symndx];
3262 /* The offset must always be a multiple of 4. We use
3263 the least significant bit to record whether we have
3264 already generated the necessary reloc. */
3269 bfd_put_32 (output_bfd, relocation,
3270 htab->elf.sgot->contents + off);
3275 Elf_Internal_Rela outrel;
3278 s = htab->elf.srelgot;
3282 outrel.r_offset = (htab->elf.sgot->output_section->vma
3283 + htab->elf.sgot->output_offset
3285 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3287 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
3288 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3291 local_got_offsets[r_symndx] |= 1;
3295 if (off >= (bfd_vma) -2)
3298 relocation = htab->elf.sgot->output_section->vma
3299 + htab->elf.sgot->output_offset + off
3300 - htab->elf.sgotplt->output_section->vma
3301 - htab->elf.sgotplt->output_offset;
3305 /* Relocation is relative to the start of the global offset
3308 /* Check to make sure it isn't a protected function symbol
3309 for shared library since it may not be local when used
3310 as function address. We also need to make sure that a
3311 symbol is defined locally. */
3312 if (info->shared && h)
3314 if (!h->def_regular)
3318 switch (ELF_ST_VISIBILITY (h->other))
3321 v = _("hidden symbol");
3324 v = _("internal symbol");
3327 v = _("protected symbol");
3334 (*_bfd_error_handler)
3335 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
3336 input_bfd, v, h->root.root.string);
3337 bfd_set_error (bfd_error_bad_value);
3340 else if (!info->executable
3341 && h->type == STT_FUNC
3342 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
3344 (*_bfd_error_handler)
3345 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
3346 input_bfd, h->root.root.string);
3347 bfd_set_error (bfd_error_bad_value);
3352 /* Note that sgot is not involved in this
3353 calculation. We always want the start of .got.plt. If we
3354 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
3355 permitted by the ABI, we might have to change this
3357 relocation -= htab->elf.sgotplt->output_section->vma
3358 + htab->elf.sgotplt->output_offset;
3362 /* Use global offset table as symbol value. */
3363 relocation = htab->elf.sgotplt->output_section->vma
3364 + htab->elf.sgotplt->output_offset;
3365 unresolved_reloc = FALSE;
3369 /* Relocation is to the entry for this symbol in the
3370 procedure linkage table. */
3372 /* Resolve a PLT32 reloc against a local symbol directly,
3373 without using the procedure linkage table. */
3377 if (h->plt.offset == (bfd_vma) -1
3378 || htab->elf.splt == NULL)
3380 /* We didn't make a PLT entry for this symbol. This
3381 happens when statically linking PIC code, or when
3382 using -Bsymbolic. */
3386 relocation = (htab->elf.splt->output_section->vma
3387 + htab->elf.splt->output_offset
3389 unresolved_reloc = FALSE;
3394 if ((input_section->flags & SEC_ALLOC) == 0
3400 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
3401 || h->root.type != bfd_link_hash_undefweak)
3402 && (r_type != R_386_PC32
3403 || !SYMBOL_CALLS_LOCAL (info, h)))
3404 || (ELIMINATE_COPY_RELOCS
3411 || h->root.type == bfd_link_hash_undefweak
3412 || h->root.type == bfd_link_hash_undefined)))
3414 Elf_Internal_Rela outrel;
3416 bfd_boolean skip, relocate;
3419 /* When generating a shared object, these relocations
3420 are copied into the output file to be resolved at run
3427 _bfd_elf_section_offset (output_bfd, info, input_section,
3429 if (outrel.r_offset == (bfd_vma) -1)
3431 else if (outrel.r_offset == (bfd_vma) -2)
3432 skip = TRUE, relocate = TRUE;
3433 outrel.r_offset += (input_section->output_section->vma
3434 + input_section->output_offset);
3437 memset (&outrel, 0, sizeof outrel);
3440 && (r_type == R_386_PC32
3442 || !SYMBOLIC_BIND (info, h)
3443 || !h->def_regular))
3444 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
3447 /* This symbol is local, or marked to become local. */
3449 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3452 sreloc = elf_section_data (input_section)->sreloc;
3454 if (sreloc == NULL || sreloc->contents == NULL)
3456 r = bfd_reloc_notsupported;
3457 goto check_relocation_error;
3460 loc = sreloc->contents;
3461 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3463 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3465 /* If this reloc is against an external symbol, we do
3466 not want to fiddle with the addend. Otherwise, we
3467 need to include the symbol value so that it becomes
3468 an addend for the dynamic reloc. */
3475 if (!info->executable)
3477 Elf_Internal_Rela outrel;
3481 outrel.r_offset = rel->r_offset
3482 + input_section->output_section->vma
3483 + input_section->output_offset;
3484 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3485 sreloc = elf_section_data (input_section)->sreloc;
3488 loc = sreloc->contents;
3489 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3490 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3495 case R_386_TLS_GOTDESC:
3496 case R_386_TLS_DESC_CALL:
3497 case R_386_TLS_IE_32:
3498 case R_386_TLS_GOTIE:
3499 tls_type = GOT_UNKNOWN;
3500 if (h == NULL && local_got_offsets)
3501 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
3503 tls_type = elf_i386_hash_entry(h)->tls_type;
3504 if (tls_type == GOT_TLS_IE)
3505 tls_type = GOT_TLS_IE_NEG;
3507 if (! elf_i386_tls_transition (info, input_bfd,
3508 input_section, contents,
3509 symtab_hdr, sym_hashes,
3510 &r_type, tls_type, rel,
3511 relend, h, r_symndx))
3514 if (r_type == R_386_TLS_LE_32)
3516 BFD_ASSERT (! unresolved_reloc);
3517 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3522 /* GD->LE transition. */
3523 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3526 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3528 movl %gs:0, %eax; subl $foo@tpoff, %eax
3529 (6 byte form of subl). */
3530 memcpy (contents + rel->r_offset - 3,
3531 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3532 roff = rel->r_offset + 5;
3536 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3538 movl %gs:0, %eax; subl $foo@tpoff, %eax
3539 (6 byte form of subl). */
3540 memcpy (contents + rel->r_offset - 2,
3541 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
3542 roff = rel->r_offset + 6;
3544 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3546 /* Skip R_386_PC32/R_386_PLT32. */
3550 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3552 /* GDesc -> LE transition.
3553 It's originally something like:
3554 leal x@tlsdesc(%ebx), %eax
3558 Registers other than %eax may be set up here. */
3563 roff = rel->r_offset;
3564 val = bfd_get_8 (input_bfd, contents + roff - 1);
3566 /* Now modify the instruction as appropriate. */
3567 /* aoliva FIXME: remove the above and xor the byte
3569 bfd_put_8 (output_bfd, val ^ 0x86,
3570 contents + roff - 1);
3571 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3575 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3577 /* GDesc -> LE transition.
3585 roff = rel->r_offset;
3586 bfd_put_8 (output_bfd, 0x66, contents + roff);
3587 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3590 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
3594 /* IE->LE transition:
3595 Originally it can be one of:
3603 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3606 /* movl foo, %eax. */
3607 bfd_put_8 (output_bfd, 0xb8,
3608 contents + rel->r_offset - 1);
3614 type = bfd_get_8 (input_bfd,
3615 contents + rel->r_offset - 2);
3620 bfd_put_8 (output_bfd, 0xc7,
3621 contents + rel->r_offset - 2);
3622 bfd_put_8 (output_bfd,
3623 0xc0 | ((val >> 3) & 7),
3624 contents + rel->r_offset - 1);
3628 bfd_put_8 (output_bfd, 0x81,
3629 contents + rel->r_offset - 2);
3630 bfd_put_8 (output_bfd,
3631 0xc0 | ((val >> 3) & 7),
3632 contents + rel->r_offset - 1);
3639 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3640 contents + rel->r_offset);
3645 unsigned int val, type;
3647 /* {IE_32,GOTIE}->LE transition:
3648 Originally it can be one of:
3649 subl foo(%reg1), %reg2
3650 movl foo(%reg1), %reg2
3651 addl foo(%reg1), %reg2
3654 movl $foo, %reg2 (6 byte form)
3655 addl $foo, %reg2. */
3656 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3657 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3661 bfd_put_8 (output_bfd, 0xc7,
3662 contents + rel->r_offset - 2);
3663 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3664 contents + rel->r_offset - 1);
3666 else if (type == 0x2b)
3669 bfd_put_8 (output_bfd, 0x81,
3670 contents + rel->r_offset - 2);
3671 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
3672 contents + rel->r_offset - 1);
3674 else if (type == 0x03)
3677 bfd_put_8 (output_bfd, 0x81,
3678 contents + rel->r_offset - 2);
3679 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
3680 contents + rel->r_offset - 1);
3684 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
3685 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
3686 contents + rel->r_offset);
3688 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
3689 contents + rel->r_offset);
3694 if (htab->elf.sgot == NULL)
3699 off = h->got.offset;
3700 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
3704 if (local_got_offsets == NULL)
3707 off = local_got_offsets[r_symndx];
3708 offplt = local_tlsdesc_gotents[r_symndx];
3715 Elf_Internal_Rela outrel;
3720 if (htab->elf.srelgot == NULL)
3723 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3725 if (GOT_TLS_GDESC_P (tls_type))
3727 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3728 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3729 <= htab->elf.sgotplt->size);
3730 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
3731 + htab->elf.sgotplt->output_offset
3733 + htab->sgotplt_jump_table_size);
3734 sreloc = htab->elf.srelplt;
3735 loc = sreloc->contents;
3736 loc += (htab->next_tls_desc_index++
3737 * sizeof (Elf32_External_Rel));
3738 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3739 <= sreloc->contents + sreloc->size);
3740 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3743 BFD_ASSERT (! unresolved_reloc);
3744 bfd_put_32 (output_bfd,
3745 relocation - elf_i386_dtpoff_base (info),
3746 htab->elf.sgotplt->contents + offplt
3747 + htab->sgotplt_jump_table_size + 4);
3751 bfd_put_32 (output_bfd, 0,
3752 htab->elf.sgotplt->contents + offplt
3753 + htab->sgotplt_jump_table_size + 4);
3757 sreloc = htab->elf.srelgot;
3759 outrel.r_offset = (htab->elf.sgot->output_section->vma
3760 + htab->elf.sgot->output_offset + off);
3762 if (GOT_TLS_GD_P (tls_type))
3763 dr_type = R_386_TLS_DTPMOD32;
3764 else if (GOT_TLS_GDESC_P (tls_type))
3766 else if (tls_type == GOT_TLS_IE_POS)
3767 dr_type = R_386_TLS_TPOFF;
3769 dr_type = R_386_TLS_TPOFF32;
3771 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3772 bfd_put_32 (output_bfd,
3773 relocation - elf_i386_dtpoff_base (info),
3774 htab->elf.sgot->contents + off);
3775 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
3776 bfd_put_32 (output_bfd,
3777 elf_i386_dtpoff_base (info) - relocation,
3778 htab->elf.sgot->contents + off);
3779 else if (dr_type != R_386_TLS_DESC)
3780 bfd_put_32 (output_bfd, 0,
3781 htab->elf.sgot->contents + off);
3782 outrel.r_info = ELF32_R_INFO (indx, dr_type);
3784 loc = sreloc->contents;
3785 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3786 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3787 <= sreloc->contents + sreloc->size);
3788 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3790 if (GOT_TLS_GD_P (tls_type))
3794 BFD_ASSERT (! unresolved_reloc);
3795 bfd_put_32 (output_bfd,
3796 relocation - elf_i386_dtpoff_base (info),
3797 htab->elf.sgot->contents + off + 4);
3801 bfd_put_32 (output_bfd, 0,
3802 htab->elf.sgot->contents + off + 4);
3803 outrel.r_info = ELF32_R_INFO (indx,
3804 R_386_TLS_DTPOFF32);
3805 outrel.r_offset += 4;
3806 sreloc->reloc_count++;
3807 loc += sizeof (Elf32_External_Rel);
3808 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3809 <= sreloc->contents + sreloc->size);
3810 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3813 else if (tls_type == GOT_TLS_IE_BOTH)
3815 bfd_put_32 (output_bfd,
3817 ? relocation - elf_i386_dtpoff_base (info)
3819 htab->elf.sgot->contents + off + 4);
3820 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3821 outrel.r_offset += 4;
3822 sreloc->reloc_count++;
3823 loc += sizeof (Elf32_External_Rel);
3824 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3831 local_got_offsets[r_symndx] |= 1;
3834 if (off >= (bfd_vma) -2
3835 && ! GOT_TLS_GDESC_P (tls_type))
3837 if (r_type == R_386_TLS_GOTDESC
3838 || r_type == R_386_TLS_DESC_CALL)
3840 relocation = htab->sgotplt_jump_table_size + offplt;
3841 unresolved_reloc = FALSE;
3843 else if (r_type == ELF32_R_TYPE (rel->r_info))
3845 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
3846 + htab->elf.sgotplt->output_offset;
3847 relocation = htab->elf.sgot->output_section->vma
3848 + htab->elf.sgot->output_offset + off - g_o_t;
3849 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3850 && tls_type == GOT_TLS_IE_BOTH)
3852 if (r_type == R_386_TLS_IE)
3853 relocation += g_o_t;
3854 unresolved_reloc = FALSE;
3856 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
3858 unsigned int val, type;
3861 /* GD->IE transition. */
3862 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3863 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3866 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3868 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3870 roff = rel->r_offset - 3;
3874 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3876 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3877 roff = rel->r_offset - 2;
3879 memcpy (contents + roff,
3880 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3881 contents[roff + 7] = 0x80 | (val & 7);
3882 /* If foo is used only with foo@gotntpoff(%reg) and
3883 foo@indntpoff, but not with foo@gottpoff(%reg), change
3884 subl $foo@gottpoff(%reg), %eax
3886 addl $foo@gotntpoff(%reg), %eax. */
3887 if (tls_type == GOT_TLS_IE_POS)
3888 contents[roff + 6] = 0x03;
3889 bfd_put_32 (output_bfd,
3890 htab->elf.sgot->output_section->vma
3891 + htab->elf.sgot->output_offset + off
3892 - htab->elf.sgotplt->output_section->vma
3893 - htab->elf.sgotplt->output_offset,
3894 contents + roff + 8);
3895 /* Skip R_386_PLT32. */
3899 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3901 /* GDesc -> IE transition.
3902 It's originally something like:
3903 leal x@tlsdesc(%ebx), %eax
3906 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
3908 movl x@gottpoff(%ebx), %eax # before negl %eax
3910 Registers other than %eax may be set up here. */
3914 /* First, make sure it's a leal adding ebx to a 32-bit
3915 offset into any register, although it's probably
3916 almost always going to be eax. */
3917 roff = rel->r_offset;
3919 /* Now modify the instruction as appropriate. */
3920 /* To turn a leal into a movl in the form we use it, it
3921 suffices to change the first byte from 0x8d to 0x8b.
3922 aoliva FIXME: should we decide to keep the leal, all
3923 we have to do is remove the statement below, and
3924 adjust the relaxation of R_386_TLS_DESC_CALL. */
3925 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3927 if (tls_type == GOT_TLS_IE_BOTH)
3930 bfd_put_32 (output_bfd,
3931 htab->elf.sgot->output_section->vma
3932 + htab->elf.sgot->output_offset + off
3933 - htab->elf.sgotplt->output_section->vma
3934 - htab->elf.sgotplt->output_offset,
3938 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3940 /* GDesc -> IE transition.
3948 depending on how we transformed the TLS_GOTDESC above.
3953 roff = rel->r_offset;
3955 /* Now modify the instruction as appropriate. */
3956 if (tls_type != GOT_TLS_IE_NEG)
3959 bfd_put_8 (output_bfd, 0x66, contents + roff);
3960 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3965 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3966 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3976 if (! elf_i386_tls_transition (info, input_bfd,
3977 input_section, contents,
3978 symtab_hdr, sym_hashes,
3979 &r_type, GOT_UNKNOWN, rel,
3980 relend, h, r_symndx))
3983 if (r_type != R_386_TLS_LDM)
3985 /* LD->LE transition:
3986 leal foo(%reg), %eax; call ___tls_get_addr.
3988 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3989 BFD_ASSERT (r_type == R_386_TLS_LE_32);
3990 memcpy (contents + rel->r_offset - 2,
3991 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3992 /* Skip R_386_PC32/R_386_PLT32. */
3997 if (htab->elf.sgot == NULL)
4000 off = htab->tls_ldm_got.offset;
4005 Elf_Internal_Rela outrel;
4008 if (htab->elf.srelgot == NULL)
4011 outrel.r_offset = (htab->elf.sgot->output_section->vma
4012 + htab->elf.sgot->output_offset + off);
4014 bfd_put_32 (output_bfd, 0,
4015 htab->elf.sgot->contents + off);
4016 bfd_put_32 (output_bfd, 0,
4017 htab->elf.sgot->contents + off + 4);
4018 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4019 loc = htab->elf.srelgot->contents;
4020 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4021 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4022 htab->tls_ldm_got.offset |= 1;
4024 relocation = htab->elf.sgot->output_section->vma
4025 + htab->elf.sgot->output_offset + off
4026 - htab->elf.sgotplt->output_section->vma
4027 - htab->elf.sgotplt->output_offset;
4028 unresolved_reloc = FALSE;
4031 case R_386_TLS_LDO_32:
4032 if (!info->executable || (input_section->flags & SEC_CODE) == 0)
4033 relocation -= elf_i386_dtpoff_base (info);
4035 /* When converting LDO to LE, we must negate. */
4036 relocation = -elf_i386_tpoff (info, relocation);
4039 case R_386_TLS_LE_32:
4041 if (!info->executable)
4043 Elf_Internal_Rela outrel;
4047 outrel.r_offset = rel->r_offset
4048 + input_section->output_section->vma
4049 + input_section->output_offset;
4050 if (h != NULL && h->dynindx != -1)
4054 if (r_type == R_386_TLS_LE_32)
4055 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
4057 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4058 sreloc = elf_section_data (input_section)->sreloc;
4061 loc = sreloc->contents;
4062 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
4063 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4066 else if (r_type == R_386_TLS_LE_32)
4067 relocation = elf_i386_dtpoff_base (info) - relocation;
4069 relocation -= elf_i386_dtpoff_base (info);
4071 else if (r_type == R_386_TLS_LE_32)
4072 relocation = elf_i386_tpoff (info, relocation);
4074 relocation = -elf_i386_tpoff (info, relocation);
4081 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
4082 because such sections are not SEC_ALLOC and thus ld.so will
4083 not process them. */
4084 if (unresolved_reloc
4085 && !((input_section->flags & SEC_DEBUGGING) != 0
4088 (*_bfd_error_handler)
4089 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
4092 (long) rel->r_offset,
4094 h->root.root.string);
4099 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
4100 contents, rel->r_offset,
4103 check_relocation_error:
4104 if (r != bfd_reloc_ok)
4109 name = h->root.root.string;
4112 name = bfd_elf_string_from_elf_section (input_bfd,
4113 symtab_hdr->sh_link,
4118 name = bfd_section_name (input_bfd, sec);
4121 if (r == bfd_reloc_overflow)
4123 if (! ((*info->callbacks->reloc_overflow)
4124 (info, (h ? &h->root : NULL), name, howto->name,
4125 (bfd_vma) 0, input_bfd, input_section,
4131 (*_bfd_error_handler)
4132 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
4133 input_bfd, input_section,
4134 (long) rel->r_offset, name, (int) r);
4143 /* Finish up dynamic symbol handling. We set the contents of various
4144 dynamic sections here. */
4147 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
4148 struct bfd_link_info *info,
4149 struct elf_link_hash_entry *h,
4150 Elf_Internal_Sym *sym)
4152 struct elf_i386_link_hash_table *htab;
4154 htab = elf_i386_hash_table (info);
4158 if (h->plt.offset != (bfd_vma) -1)
4162 Elf_Internal_Rela rel;
4164 asection *plt, *gotplt, *relplt;
4166 /* When building a static executable, use .iplt, .igot.plt and
4167 .rel.iplt sections for STT_GNU_IFUNC symbols. */
4168 if (htab->elf.splt != NULL)
4170 plt = htab->elf.splt;
4171 gotplt = htab->elf.sgotplt;
4172 relplt = htab->elf.srelplt;
4176 plt = htab->elf.iplt;
4177 gotplt = htab->elf.igotplt;
4178 relplt = htab->elf.irelplt;
4181 /* This symbol has an entry in the procedure linkage table. Set
4184 if ((h->dynindx == -1
4185 && !((h->forced_local || info->executable)
4187 && h->type == STT_GNU_IFUNC))
4193 /* Get the index in the procedure linkage table which
4194 corresponds to this symbol. This is the index of this symbol
4195 in all the symbols for which we are making plt entries. The
4196 first entry in the procedure linkage table is reserved.
4198 Get the offset into the .got table of the entry that
4199 corresponds to this function. Each .got entry is 4 bytes.
4200 The first three are reserved.
4202 For static executables, we don't reserve anything. */
4204 if (plt == htab->elf.splt)
4206 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
4207 got_offset = (plt_index + 3) * 4;
4211 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
4212 got_offset = plt_index * 4;
4215 /* Fill in the entry in the procedure linkage table. */
4218 memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry,
4220 bfd_put_32 (output_bfd,
4221 (gotplt->output_section->vma
4222 + gotplt->output_offset
4224 plt->contents + h->plt.offset + 2);
4226 if (htab->is_vxworks)
4228 int s, k, reloc_index;
4230 /* Create the R_386_32 relocation referencing the GOT
4231 for this PLT entry. */
4233 /* S: Current slot number (zero-based). */
4234 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
4235 /* K: Number of relocations for PLTResolve. */
4237 k = PLTRESOLVE_RELOCS_SHLIB;
4239 k = PLTRESOLVE_RELOCS;
4240 /* Skip the PLTresolve relocations, and the relocations for
4241 the other PLT slots. */
4242 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
4243 loc = (htab->srelplt2->contents + reloc_index
4244 * sizeof (Elf32_External_Rel));
4246 rel.r_offset = (htab->elf.splt->output_section->vma
4247 + htab->elf.splt->output_offset
4248 + h->plt.offset + 2),
4249 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4250 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4252 /* Create the R_386_32 relocation referencing the beginning of
4253 the PLT for this GOT entry. */
4254 rel.r_offset = (htab->elf.sgotplt->output_section->vma
4255 + htab->elf.sgotplt->output_offset
4257 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4258 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4259 loc + sizeof (Elf32_External_Rel));
4264 memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry,
4266 bfd_put_32 (output_bfd, got_offset,
4267 plt->contents + h->plt.offset + 2);
4270 /* Don't fill PLT entry for static executables. */
4271 if (plt == htab->elf.splt)
4273 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
4274 plt->contents + h->plt.offset + 7);
4275 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
4276 plt->contents + h->plt.offset + 12);
4279 /* Fill in the entry in the global offset table. */
4280 bfd_put_32 (output_bfd,
4281 (plt->output_section->vma
4282 + plt->output_offset
4285 gotplt->contents + got_offset);
4287 /* Fill in the entry in the .rel.plt section. */
4288 rel.r_offset = (gotplt->output_section->vma
4289 + gotplt->output_offset
4291 if (h->dynindx == -1
4292 || ((info->executable
4293 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
4295 && h->type == STT_GNU_IFUNC))
4297 /* If an STT_GNU_IFUNC symbol is locally defined, generate
4298 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
4299 in the .got.plt section. */
4300 bfd_put_32 (output_bfd,
4301 (h->root.u.def.value
4302 + h->root.u.def.section->output_section->vma
4303 + h->root.u.def.section->output_offset),
4304 gotplt->contents + got_offset);
4305 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4308 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
4309 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
4310 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4312 if (!h->def_regular)
4314 /* Mark the symbol as undefined, rather than as defined in
4315 the .plt section. Leave the value if there were any
4316 relocations where pointer equality matters (this is a clue
4317 for the dynamic linker, to make function pointer
4318 comparisons work between an application and shared
4319 library), otherwise set it to zero. If a function is only
4320 called from a binary, there is no need to slow down
4321 shared libraries because of that. */
4322 sym->st_shndx = SHN_UNDEF;
4323 if (!h->pointer_equality_needed)
4328 if (h->got.offset != (bfd_vma) -1
4329 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
4330 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
4332 Elf_Internal_Rela rel;
4335 /* This symbol has an entry in the global offset table. Set it
4338 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
4341 rel.r_offset = (htab->elf.sgot->output_section->vma
4342 + htab->elf.sgot->output_offset
4343 + (h->got.offset & ~(bfd_vma) 1));
4345 /* If this is a static link, or it is a -Bsymbolic link and the
4346 symbol is defined locally or was forced to be local because
4347 of a version file, we just want to emit a RELATIVE reloc.
4348 The entry in the global offset table will already have been
4349 initialized in the relocate_section function. */
4351 && h->type == STT_GNU_IFUNC)
4355 /* Generate R_386_GLOB_DAT. */
4362 if (!h->pointer_equality_needed)
4365 /* For non-shared object, we can't use .got.plt, which
4366 contains the real function addres if we need pointer
4367 equality. We load the GOT entry with the PLT entry. */
4368 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
4369 bfd_put_32 (output_bfd,
4370 (plt->output_section->vma
4371 + plt->output_offset + h->plt.offset),
4372 htab->elf.sgot->contents + h->got.offset);
4376 else if (info->shared
4377 && SYMBOL_REFERENCES_LOCAL (info, h))
4379 BFD_ASSERT((h->got.offset & 1) != 0);
4380 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4384 BFD_ASSERT((h->got.offset & 1) == 0);
4386 bfd_put_32 (output_bfd, (bfd_vma) 0,
4387 htab->elf.sgot->contents + h->got.offset);
4388 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
4391 loc = htab->elf.srelgot->contents;
4392 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
4393 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4398 Elf_Internal_Rela rel;
4401 /* This symbol needs a copy reloc. Set it up. */
4403 if (h->dynindx == -1
4404 || (h->root.type != bfd_link_hash_defined
4405 && h->root.type != bfd_link_hash_defweak)
4406 || htab->srelbss == NULL)
4409 rel.r_offset = (h->root.u.def.value
4410 + h->root.u.def.section->output_section->vma
4411 + h->root.u.def.section->output_offset);
4412 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
4413 loc = htab->srelbss->contents;
4414 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
4415 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
4418 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may
4419 be NULL for local symbols.
4421 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
4422 is relative to the ".got" section. */
4424 && (strcmp (h->root.root.string, "_DYNAMIC") == 0
4425 || (!htab->is_vxworks && h == htab->elf.hgot)))
4426 sym->st_shndx = SHN_ABS;
4431 /* Finish up local dynamic symbol handling. We set the contents of
4432 various dynamic sections here. */
4435 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
4437 struct elf_link_hash_entry *h
4438 = (struct elf_link_hash_entry *) *slot;
4439 struct bfd_link_info *info
4440 = (struct bfd_link_info *) inf;
4442 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
4446 /* Used to decide how to sort relocs in an optimal manner for the
4447 dynamic linker, before writing them out. */
4449 static enum elf_reloc_type_class
4450 elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
4452 switch (ELF32_R_TYPE (rela->r_info))
4454 case R_386_RELATIVE:
4455 return reloc_class_relative;
4456 case R_386_JUMP_SLOT:
4457 return reloc_class_plt;
4459 return reloc_class_copy;
4461 return reloc_class_normal;
4465 /* Finish up the dynamic sections. */
4468 elf_i386_finish_dynamic_sections (bfd *output_bfd,
4469 struct bfd_link_info *info)
4471 struct elf_i386_link_hash_table *htab;
4475 htab = elf_i386_hash_table (info);
4479 dynobj = htab->elf.dynobj;
4480 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
4482 if (htab->elf.dynamic_sections_created)
4484 Elf32_External_Dyn *dyncon, *dynconend;
4486 if (sdyn == NULL || htab->elf.sgot == NULL)
4489 dyncon = (Elf32_External_Dyn *) sdyn->contents;
4490 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
4491 for (; dyncon < dynconend; dyncon++)
4493 Elf_Internal_Dyn dyn;
4496 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
4501 if (htab->is_vxworks
4502 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
4507 s = htab->elf.sgotplt;
4508 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4512 s = htab->elf.srelplt;
4513 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
4517 s = htab->elf.srelplt;
4518 dyn.d_un.d_val = s->size;
4522 /* My reading of the SVR4 ABI indicates that the
4523 procedure linkage table relocs (DT_JMPREL) should be
4524 included in the overall relocs (DT_REL). This is
4525 what Solaris does. However, UnixWare can not handle
4526 that case. Therefore, we override the DT_RELSZ entry
4527 here to make it not include the JMPREL relocs. */
4528 s = htab->elf.srelplt;
4531 dyn.d_un.d_val -= s->size;
4535 /* We may not be using the standard ELF linker script.
4536 If .rel.plt is the first .rel section, we adjust
4537 DT_REL to not include it. */
4538 s = htab->elf.srelplt;
4541 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
4543 dyn.d_un.d_ptr += s->size;
4547 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
4550 /* Fill in the first entry in the procedure linkage table. */
4551 if (htab->elf.splt && htab->elf.splt->size > 0)
4555 memcpy (htab->elf.splt->contents, elf_i386_pic_plt0_entry,
4556 sizeof (elf_i386_pic_plt0_entry));
4557 memset (htab->elf.splt->contents + sizeof (elf_i386_pic_plt0_entry),
4558 htab->plt0_pad_byte,
4559 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
4563 memcpy (htab->elf.splt->contents, elf_i386_plt0_entry,
4564 sizeof(elf_i386_plt0_entry));
4565 memset (htab->elf.splt->contents + sizeof (elf_i386_plt0_entry),
4566 htab->plt0_pad_byte,
4567 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
4568 bfd_put_32 (output_bfd,
4569 (htab->elf.sgotplt->output_section->vma
4570 + htab->elf.sgotplt->output_offset
4572 htab->elf.splt->contents + 2);
4573 bfd_put_32 (output_bfd,
4574 (htab->elf.sgotplt->output_section->vma
4575 + htab->elf.sgotplt->output_offset
4577 htab->elf.splt->contents + 8);
4579 if (htab->is_vxworks)
4581 Elf_Internal_Rela rel;
4583 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
4584 On IA32 we use REL relocations so the addend goes in
4585 the PLT directly. */
4586 rel.r_offset = (htab->elf.splt->output_section->vma
4587 + htab->elf.splt->output_offset
4589 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4590 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4591 htab->srelplt2->contents);
4592 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
4593 rel.r_offset = (htab->elf.splt->output_section->vma
4594 + htab->elf.splt->output_offset
4596 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4597 bfd_elf32_swap_reloc_out (output_bfd, &rel,
4598 htab->srelplt2->contents +
4599 sizeof (Elf32_External_Rel));
4603 /* UnixWare sets the entsize of .plt to 4, although that doesn't
4604 really seem like the right value. */
4605 elf_section_data (htab->elf.splt->output_section)
4606 ->this_hdr.sh_entsize = 4;
4608 /* Correct the .rel.plt.unloaded relocations. */
4609 if (htab->is_vxworks && !info->shared)
4611 int num_plts = (htab->elf.splt->size / PLT_ENTRY_SIZE) - 1;
4614 p = htab->srelplt2->contents;
4616 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
4618 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
4620 for (; num_plts; num_plts--)
4622 Elf_Internal_Rela rel;
4623 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4624 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
4625 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4626 p += sizeof (Elf32_External_Rel);
4628 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
4629 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
4630 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
4631 p += sizeof (Elf32_External_Rel);
4637 if (htab->elf.sgotplt)
4639 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
4641 (*_bfd_error_handler)
4642 (_("discarded output section: `%A'"), htab->elf.sgotplt);
4646 /* Fill in the first three entries in the global offset table. */
4647 if (htab->elf.sgotplt->size > 0)
4649 bfd_put_32 (output_bfd,
4651 : sdyn->output_section->vma + sdyn->output_offset),
4652 htab->elf.sgotplt->contents);
4653 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
4654 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
4657 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
4660 if (htab->elf.sgot && htab->elf.sgot->size > 0)
4661 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
4663 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
4664 htab_traverse (htab->loc_hash_table,
4665 elf_i386_finish_local_dynamic_symbol,
4671 /* Return address for Ith PLT stub in section PLT, for relocation REL
4672 or (bfd_vma) -1 if it should not be included. */
4675 elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
4676 const arelent *rel ATTRIBUTE_UNUSED)
4678 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
4681 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
4684 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
4686 if (h->plt.offset != (bfd_vma) -1
4688 && !h->pointer_equality_needed)
4691 return _bfd_elf_hash_symbol (h);
4694 /* Hook called by the linker routine which adds symbols from an object
4698 elf_i386_add_symbol_hook (bfd * abfd,
4699 struct bfd_link_info * info ATTRIBUTE_UNUSED,
4700 Elf_Internal_Sym * sym,
4701 const char ** namep ATTRIBUTE_UNUSED,
4702 flagword * flagsp ATTRIBUTE_UNUSED,
4703 asection ** secp ATTRIBUTE_UNUSED,
4704 bfd_vma * valp ATTRIBUTE_UNUSED)
4706 if ((abfd->flags & DYNAMIC) == 0
4707 && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
4708 elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
4713 #define TARGET_LITTLE_SYM bfd_elf32_i386_vec
4714 #define TARGET_LITTLE_NAME "elf32-i386"
4715 #define ELF_ARCH bfd_arch_i386
4716 #define ELF_TARGET_ID I386_ELF_DATA
4717 #define ELF_MACHINE_CODE EM_386
4718 #define ELF_MAXPAGESIZE 0x1000
4720 #define elf_backend_can_gc_sections 1
4721 #define elf_backend_can_refcount 1
4722 #define elf_backend_want_got_plt 1
4723 #define elf_backend_plt_readonly 1
4724 #define elf_backend_want_plt_sym 0
4725 #define elf_backend_got_header_size 12
4727 /* Support RELA for objdump of prelink objects. */
4728 #define elf_info_to_howto elf_i386_info_to_howto_rel
4729 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
4731 #define bfd_elf32_mkobject elf_i386_mkobject
4733 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
4734 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
4735 #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free
4736 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
4737 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
4739 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
4740 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
4741 #define elf_backend_check_relocs elf_i386_check_relocs
4742 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
4743 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
4744 #define elf_backend_fake_sections elf_i386_fake_sections
4745 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
4746 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
4747 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
4748 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
4749 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
4750 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
4751 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
4752 #define elf_backend_relocate_section elf_i386_relocate_section
4753 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
4754 #define elf_backend_always_size_sections elf_i386_always_size_sections
4755 #define elf_backend_omit_section_dynsym \
4756 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
4757 #define elf_backend_plt_sym_val elf_i386_plt_sym_val
4758 #define elf_backend_hash_symbol elf_i386_hash_symbol
4759 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
4760 #undef elf_backend_post_process_headers
4761 #define elf_backend_post_process_headers _bfd_elf_set_osabi
4763 #include "elf32-target.h"
4765 /* FreeBSD support. */
4767 #undef TARGET_LITTLE_SYM
4768 #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
4769 #undef TARGET_LITTLE_NAME
4770 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
4772 #define ELF_OSABI ELFOSABI_FREEBSD
4774 /* The kernel recognizes executables as valid only if they carry a
4775 "FreeBSD" label in the ELF header. So we put this label on all
4776 executables and (for simplicity) also all other object files. */
4779 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
4781 _bfd_elf_set_osabi (abfd, info);
4783 #ifdef OLD_FREEBSD_ABI_LABEL
4784 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
4785 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
4789 #undef elf_backend_post_process_headers
4790 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
4792 #define elf32_bed elf32_i386_fbsd_bed
4794 #undef elf_backend_add_symbol_hook
4796 #include "elf32-target.h"
4800 #undef TARGET_LITTLE_SYM
4801 #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec
4802 #undef TARGET_LITTLE_NAME
4803 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
4805 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
4806 objects won't be recognized. */
4810 #define elf32_bed elf32_i386_sol2_bed
4812 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
4814 #undef elf_backend_static_tls_alignment
4815 #define elf_backend_static_tls_alignment 8
4817 /* The Solaris 2 ABI requires a plt symbol on all platforms.
4819 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
4821 #undef elf_backend_want_plt_sym
4822 #define elf_backend_want_plt_sym 1
4824 #include "elf32-target.h"
4826 /* VxWorks support. */
4828 #undef TARGET_LITTLE_SYM
4829 #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
4830 #undef TARGET_LITTLE_NAME
4831 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
4834 /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
4836 static struct bfd_link_hash_table *
4837 elf_i386_vxworks_link_hash_table_create (bfd *abfd)
4839 struct bfd_link_hash_table *ret;
4840 struct elf_i386_link_hash_table *htab;
4842 ret = elf_i386_link_hash_table_create (abfd);
4845 htab = (struct elf_i386_link_hash_table *) ret;
4846 htab->is_vxworks = 1;
4847 htab->plt0_pad_byte = 0x90;
4854 #undef elf_backend_relocs_compatible
4855 #undef elf_backend_post_process_headers
4856 #undef bfd_elf32_bfd_link_hash_table_create
4857 #define bfd_elf32_bfd_link_hash_table_create \
4858 elf_i386_vxworks_link_hash_table_create
4859 #undef elf_backend_add_symbol_hook
4860 #define elf_backend_add_symbol_hook \
4861 elf_vxworks_add_symbol_hook
4862 #undef elf_backend_link_output_symbol_hook
4863 #define elf_backend_link_output_symbol_hook \
4864 elf_vxworks_link_output_symbol_hook
4865 #undef elf_backend_emit_relocs
4866 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
4867 #undef elf_backend_final_write_processing
4868 #define elf_backend_final_write_processing \
4869 elf_vxworks_final_write_processing
4870 #undef elf_backend_static_tls_alignment
4872 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4874 #undef elf_backend_want_plt_sym
4875 #define elf_backend_want_plt_sym 1
4878 #define elf32_bed elf32_i386_vxworks_bed
4880 #include "elf32-target.h"