1 /* Intel 80386/80486-specific support for 32-bit ELF
2 Copyright (C) 1993-2016 Free Software Foundation, Inc.
4 This file is part of BFD, the Binary File Descriptor library.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "elf-vxworks.h"
28 #include "bfd_stdint.h"
32 #include "opcode/i386.h"
34 /* 386 uses REL relocations instead of RELA. */
39 static reloc_howto_type elf_howto_table[]=
41 HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont,
42 bfd_elf_generic_reloc, "R_386_NONE",
43 TRUE, 0x00000000, 0x00000000, FALSE),
44 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
45 bfd_elf_generic_reloc, "R_386_32",
46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
48 bfd_elf_generic_reloc, "R_386_PC32",
49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
51 bfd_elf_generic_reloc, "R_386_GOT32",
52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
54 bfd_elf_generic_reloc, "R_386_PLT32",
55 TRUE, 0xffffffff, 0xffffffff, TRUE),
56 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
57 bfd_elf_generic_reloc, "R_386_COPY",
58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_386_RELATIVE",
67 TRUE, 0xffffffff, 0xffffffff, FALSE),
68 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_386_GOTOFF",
70 TRUE, 0xffffffff, 0xffffffff, FALSE),
71 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_386_GOTPC",
73 TRUE, 0xffffffff, 0xffffffff, TRUE),
75 /* We have a gap in the reloc numbers here.
76 R_386_standard counts the number up to this point, and
77 R_386_ext_offset is the value to subtract from a reloc type of
78 R_386_16 thru R_386_PC8 to form an index into this table. */
79 #define R_386_standard (R_386_GOTPC + 1)
80 #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
82 /* These relocs are a GNU extension. */
83 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_386_TLS_IE",
88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_386_TLS_LE",
94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_386_TLS_GD",
97 TRUE, 0xffffffff, 0xffffffff, FALSE),
98 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_386_TLS_LDM",
100 TRUE, 0xffffffff, 0xffffffff, FALSE),
101 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_386_16",
103 TRUE, 0xffff, 0xffff, FALSE),
104 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_386_PC16",
106 TRUE, 0xffff, 0xffff, TRUE),
107 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_386_8",
109 TRUE, 0xff, 0xff, FALSE),
110 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
111 bfd_elf_generic_reloc, "R_386_PC8",
112 TRUE, 0xff, 0xff, TRUE),
114 #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
115 #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
116 /* These are common with Solaris TLS implementation. */
117 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
128 TRUE, 0xffffffff, 0xffffffff, FALSE),
129 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
131 TRUE, 0xffffffff, 0xffffffff, FALSE),
132 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
134 TRUE, 0xffffffff, 0xffffffff, FALSE),
135 HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned,
136 bfd_elf_generic_reloc, "R_386_SIZE32",
137 TRUE, 0xffffffff, 0xffffffff, FALSE),
138 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
140 TRUE, 0xffffffff, 0xffffffff, FALSE),
141 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
142 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
144 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_386_TLS_DESC",
146 TRUE, 0xffffffff, 0xffffffff, FALSE),
147 HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_386_IRELATIVE",
149 TRUE, 0xffffffff, 0xffffffff, FALSE),
150 HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_386_GOT32X",
152 TRUE, 0xffffffff, 0xffffffff, FALSE),
155 #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset)
156 #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2)
158 /* GNU extension to record C++ vtable hierarchy. */
159 HOWTO (R_386_GNU_VTINHERIT, /* type */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
163 FALSE, /* pc_relative */
165 complain_overflow_dont, /* complain_on_overflow */
166 NULL, /* special_function */
167 "R_386_GNU_VTINHERIT", /* name */
168 FALSE, /* partial_inplace */
171 FALSE), /* pcrel_offset */
173 /* GNU extension to record C++ vtable member usage. */
174 HOWTO (R_386_GNU_VTENTRY, /* type */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
178 FALSE, /* pc_relative */
180 complain_overflow_dont, /* complain_on_overflow */
181 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
182 "R_386_GNU_VTENTRY", /* name */
183 FALSE, /* partial_inplace */
186 FALSE) /* pcrel_offset */
188 #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
192 #ifdef DEBUG_GEN_RELOC
194 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
199 static reloc_howto_type *
200 elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
201 bfd_reloc_code_real_type code)
206 TRACE ("BFD_RELOC_NONE");
207 return &elf_howto_table[R_386_NONE];
210 TRACE ("BFD_RELOC_32");
211 return &elf_howto_table[R_386_32];
214 TRACE ("BFD_RELOC_CTOR");
215 return &elf_howto_table[R_386_32];
217 case BFD_RELOC_32_PCREL:
218 TRACE ("BFD_RELOC_PC32");
219 return &elf_howto_table[R_386_PC32];
221 case BFD_RELOC_386_GOT32:
222 TRACE ("BFD_RELOC_386_GOT32");
223 return &elf_howto_table[R_386_GOT32];
225 case BFD_RELOC_386_PLT32:
226 TRACE ("BFD_RELOC_386_PLT32");
227 return &elf_howto_table[R_386_PLT32];
229 case BFD_RELOC_386_COPY:
230 TRACE ("BFD_RELOC_386_COPY");
231 return &elf_howto_table[R_386_COPY];
233 case BFD_RELOC_386_GLOB_DAT:
234 TRACE ("BFD_RELOC_386_GLOB_DAT");
235 return &elf_howto_table[R_386_GLOB_DAT];
237 case BFD_RELOC_386_JUMP_SLOT:
238 TRACE ("BFD_RELOC_386_JUMP_SLOT");
239 return &elf_howto_table[R_386_JUMP_SLOT];
241 case BFD_RELOC_386_RELATIVE:
242 TRACE ("BFD_RELOC_386_RELATIVE");
243 return &elf_howto_table[R_386_RELATIVE];
245 case BFD_RELOC_386_GOTOFF:
246 TRACE ("BFD_RELOC_386_GOTOFF");
247 return &elf_howto_table[R_386_GOTOFF];
249 case BFD_RELOC_386_GOTPC:
250 TRACE ("BFD_RELOC_386_GOTPC");
251 return &elf_howto_table[R_386_GOTPC];
253 /* These relocs are a GNU extension. */
254 case BFD_RELOC_386_TLS_TPOFF:
255 TRACE ("BFD_RELOC_386_TLS_TPOFF");
256 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
258 case BFD_RELOC_386_TLS_IE:
259 TRACE ("BFD_RELOC_386_TLS_IE");
260 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
262 case BFD_RELOC_386_TLS_GOTIE:
263 TRACE ("BFD_RELOC_386_TLS_GOTIE");
264 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
266 case BFD_RELOC_386_TLS_LE:
267 TRACE ("BFD_RELOC_386_TLS_LE");
268 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
270 case BFD_RELOC_386_TLS_GD:
271 TRACE ("BFD_RELOC_386_TLS_GD");
272 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
274 case BFD_RELOC_386_TLS_LDM:
275 TRACE ("BFD_RELOC_386_TLS_LDM");
276 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
279 TRACE ("BFD_RELOC_16");
280 return &elf_howto_table[R_386_16 - R_386_ext_offset];
282 case BFD_RELOC_16_PCREL:
283 TRACE ("BFD_RELOC_16_PCREL");
284 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
287 TRACE ("BFD_RELOC_8");
288 return &elf_howto_table[R_386_8 - R_386_ext_offset];
290 case BFD_RELOC_8_PCREL:
291 TRACE ("BFD_RELOC_8_PCREL");
292 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
294 /* Common with Sun TLS implementation. */
295 case BFD_RELOC_386_TLS_LDO_32:
296 TRACE ("BFD_RELOC_386_TLS_LDO_32");
297 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
299 case BFD_RELOC_386_TLS_IE_32:
300 TRACE ("BFD_RELOC_386_TLS_IE_32");
301 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
303 case BFD_RELOC_386_TLS_LE_32:
304 TRACE ("BFD_RELOC_386_TLS_LE_32");
305 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
307 case BFD_RELOC_386_TLS_DTPMOD32:
308 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
309 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
311 case BFD_RELOC_386_TLS_DTPOFF32:
312 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
313 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
315 case BFD_RELOC_386_TLS_TPOFF32:
316 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
317 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
319 case BFD_RELOC_SIZE32:
320 TRACE ("BFD_RELOC_SIZE32");
321 return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset];
323 case BFD_RELOC_386_TLS_GOTDESC:
324 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
325 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
327 case BFD_RELOC_386_TLS_DESC_CALL:
328 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
329 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
331 case BFD_RELOC_386_TLS_DESC:
332 TRACE ("BFD_RELOC_386_TLS_DESC");
333 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
335 case BFD_RELOC_386_IRELATIVE:
336 TRACE ("BFD_RELOC_386_IRELATIVE");
337 return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset];
339 case BFD_RELOC_386_GOT32X:
340 TRACE ("BFD_RELOC_386_GOT32X");
341 return &elf_howto_table[R_386_GOT32X - R_386_tls_offset];
343 case BFD_RELOC_VTABLE_INHERIT:
344 TRACE ("BFD_RELOC_VTABLE_INHERIT");
345 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
347 case BFD_RELOC_VTABLE_ENTRY:
348 TRACE ("BFD_RELOC_VTABLE_ENTRY");
349 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
359 static reloc_howto_type *
360 elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
365 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
366 if (elf_howto_table[i].name != NULL
367 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
368 return &elf_howto_table[i];
373 static reloc_howto_type *
374 elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type)
378 if ((indx = r_type) >= R_386_standard
379 && ((indx = r_type - R_386_ext_offset) - R_386_standard
380 >= R_386_ext - R_386_standard)
381 && ((indx = r_type - R_386_tls_offset) - R_386_ext
382 >= R_386_ext2 - R_386_ext)
383 && ((indx = r_type - R_386_vt_offset) - R_386_ext2
384 >= R_386_vt - R_386_ext2))
386 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
390 /* PR 17512: file: 0f67f69d. */
391 if (elf_howto_table [indx].type != r_type)
393 return &elf_howto_table[indx];
397 elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
399 Elf_Internal_Rela *dst)
401 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
402 cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type);
405 /* Return whether a symbol name implies a local label. The UnixWare
406 2.1 cc generates temporary symbols that start with .X, so we
407 recognize them here. FIXME: do other SVR4 compilers also use .X?.
408 If so, we should move the .X recognition into
409 _bfd_elf_is_local_label_name. */
412 elf_i386_is_local_label_name (bfd *abfd, const char *name)
414 if (name[0] == '.' && name[1] == 'X')
417 return _bfd_elf_is_local_label_name (abfd, name);
420 /* Support for core dump NOTE sections. */
423 elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
428 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
430 int pr_version = bfd_get_32 (abfd, note->descdata);
436 elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20);
439 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
443 size = bfd_get_32 (abfd, note->descdata + 8);
447 switch (note->descsz)
452 case 144: /* Linux/i386 */
454 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
457 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
467 /* Make a ".reg/999" section. */
468 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
469 size, note->descpos + offset);
473 elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
475 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
477 int pr_version = bfd_get_32 (abfd, note->descdata);
482 elf_tdata (abfd)->core->program
483 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
484 elf_tdata (abfd)->core->command
485 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
489 switch (note->descsz)
494 case 124: /* Linux/i386 elf_prpsinfo. */
495 elf_tdata (abfd)->core->pid
496 = bfd_get_32 (abfd, note->descdata + 12);
497 elf_tdata (abfd)->core->program
498 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
499 elf_tdata (abfd)->core->command
500 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
504 /* Note that for some reason, a spurious space is tacked
505 onto the end of the args in some (at least one anyway)
506 implementations, so strip it off if it exists. */
508 char *command = elf_tdata (abfd)->core->command;
509 int n = strlen (command);
511 if (0 < n && command[n - 1] == ' ')
512 command[n - 1] = '\0';
518 /* Functions for the i386 ELF linker.
520 In order to gain some understanding of code in this file without
521 knowing all the intricate details of the linker, note the
524 Functions named elf_i386_* are called by external routines, other
525 functions are only called locally. elf_i386_* functions appear
526 in this file more or less in the order in which they are called
527 from external routines. eg. elf_i386_check_relocs is called
528 early in the link process, elf_i386_finish_dynamic_sections is
529 one of the last functions. */
532 /* The name of the dynamic interpreter. This is put in the .interp
535 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
537 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
538 copying dynamic variables from a shared lib into an app's dynbss
539 section, and instead use a dynamic relocation to point into the
541 #define ELIMINATE_COPY_RELOCS 1
543 /* The size in bytes of an entry in the procedure linkage table. */
545 #define PLT_ENTRY_SIZE 16
547 /* The first entry in an absolute procedure linkage table looks like
548 this. See the SVR4 ABI i386 supplement to see how this works.
549 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
551 static const bfd_byte elf_i386_plt0_entry[12] =
553 0xff, 0x35, /* pushl contents of address */
554 0, 0, 0, 0, /* replaced with address of .got + 4. */
555 0xff, 0x25, /* jmp indirect */
556 0, 0, 0, 0 /* replaced with address of .got + 8. */
559 /* Subsequent entries in an absolute procedure linkage table look like
562 static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
564 0xff, 0x25, /* jmp indirect */
565 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
566 0x68, /* pushl immediate */
567 0, 0, 0, 0, /* replaced with offset into relocation table. */
568 0xe9, /* jmp relative */
569 0, 0, 0, 0 /* replaced with offset to start of .plt. */
572 /* The first entry in a PIC procedure linkage table look like this.
573 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
575 static const bfd_byte elf_i386_pic_plt0_entry[12] =
577 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
578 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
581 /* Subsequent entries in a PIC procedure linkage table look like this. */
583 static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
585 0xff, 0xa3, /* jmp *offset(%ebx) */
586 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
587 0x68, /* pushl immediate */
588 0, 0, 0, 0, /* replaced with offset into relocation table. */
589 0xe9, /* jmp relative */
590 0, 0, 0, 0 /* replaced with offset to start of .plt. */
593 /* Entries in the GOT procedure linkage table look like this. */
595 static const bfd_byte elf_i386_got_plt_entry[8] =
597 0xff, 0x25, /* jmp indirect */
598 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
599 0x66, 0x90 /* xchg %ax,%ax */
602 /* Entries in the PIC GOT procedure linkage table look like this. */
604 static const bfd_byte elf_i386_pic_got_plt_entry[8] =
606 0xff, 0xa3, /* jmp *offset(%ebx) */
607 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
608 0x66, 0x90 /* xchg %ax,%ax */
611 /* .eh_frame covering the .plt section. */
613 static const bfd_byte elf_i386_eh_frame_plt[] =
615 #define PLT_CIE_LENGTH 20
616 #define PLT_FDE_LENGTH 36
617 #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8
618 #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12
619 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
620 0, 0, 0, 0, /* CIE ID */
622 'z', 'R', 0, /* Augmentation string */
623 1, /* Code alignment factor */
624 0x7c, /* Data alignment factor */
625 8, /* Return address column */
626 1, /* Augmentation size */
627 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
628 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
629 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
630 DW_CFA_nop, DW_CFA_nop,
632 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
633 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
634 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
635 0, 0, 0, 0, /* .plt size goes here */
636 0, /* Augmentation size */
637 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
638 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
639 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
640 DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */
641 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
642 11, /* Block length */
643 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
644 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
645 DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge,
646 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
647 DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop
650 struct elf_i386_plt_layout
652 /* The first entry in an absolute procedure linkage table looks like this. */
653 const bfd_byte *plt0_entry;
654 unsigned int plt0_entry_size;
656 /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */
657 unsigned int plt0_got1_offset;
658 unsigned int plt0_got2_offset;
660 /* Later entries in an absolute procedure linkage table look like this. */
661 const bfd_byte *plt_entry;
662 unsigned int plt_entry_size;
664 /* Offsets into plt_entry that are to be replaced with... */
665 unsigned int plt_got_offset; /* ... address of this symbol in .got. */
666 unsigned int plt_reloc_offset; /* ... offset into relocation table. */
667 unsigned int plt_plt_offset; /* ... offset to start of .plt. */
669 /* Offset into plt_entry where the initial value of the GOT entry points. */
670 unsigned int plt_lazy_offset;
672 /* The first entry in a PIC procedure linkage table looks like this. */
673 const bfd_byte *pic_plt0_entry;
675 /* Subsequent entries in a PIC procedure linkage table look like this. */
676 const bfd_byte *pic_plt_entry;
678 /* .eh_frame covering the .plt section. */
679 const bfd_byte *eh_frame_plt;
680 unsigned int eh_frame_plt_size;
683 #define GET_PLT_ENTRY_SIZE(abfd) \
684 get_elf_i386_backend_data (abfd)->plt->plt_entry_size
686 /* These are the standard parameters. */
687 static const struct elf_i386_plt_layout elf_i386_plt =
689 elf_i386_plt0_entry, /* plt0_entry */
690 sizeof (elf_i386_plt0_entry), /* plt0_entry_size */
691 2, /* plt0_got1_offset */
692 8, /* plt0_got2_offset */
693 elf_i386_plt_entry, /* plt_entry */
694 PLT_ENTRY_SIZE, /* plt_entry_size */
695 2, /* plt_got_offset */
696 7, /* plt_reloc_offset */
697 12, /* plt_plt_offset */
698 6, /* plt_lazy_offset */
699 elf_i386_pic_plt0_entry, /* pic_plt0_entry */
700 elf_i386_pic_plt_entry, /* pic_plt_entry */
701 elf_i386_eh_frame_plt, /* eh_frame_plt */
702 sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */
706 /* On VxWorks, the .rel.plt.unloaded section has absolute relocations
707 for the PLTResolve stub and then for each PLT entry. */
708 #define PLTRESOLVE_RELOCS_SHLIB 0
709 #define PLTRESOLVE_RELOCS 2
710 #define PLT_NON_JUMP_SLOT_RELOCS 2
712 /* Architecture-specific backend data for i386. */
714 struct elf_i386_backend_data
716 /* Parameters describing PLT generation. */
717 const struct elf_i386_plt_layout *plt;
719 /* Value used to fill the unused bytes of the first PLT entry. */
720 bfd_byte plt0_pad_byte;
722 /* True if the target system is VxWorks. */
726 #define get_elf_i386_backend_data(abfd) \
727 ((const struct elf_i386_backend_data *) \
728 get_elf_backend_data (abfd)->arch_data)
730 /* These are the standard parameters. */
731 static const struct elf_i386_backend_data elf_i386_arch_bed =
733 &elf_i386_plt, /* plt */
734 0, /* plt0_pad_byte */
738 #define elf_backend_arch_data &elf_i386_arch_bed
740 /* Is a undefined weak symbol which is resolved to 0. Reference to an
741 undefined weak symbol is resolved to 0 when building executable if
743 1. Has non-GOT/non-PLT relocations in text section. Or
744 2. Has no GOT/PLT relocation.
746 #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \
747 ((EH)->elf.root.type == bfd_link_hash_undefweak \
748 && bfd_link_executable (INFO) \
749 && (elf_i386_hash_table (INFO)->interp == NULL \
751 || (EH)->has_non_got_reloc \
752 || !(INFO)->dynamic_undefined_weak))
754 /* i386 ELF linker hash entry. */
756 struct elf_i386_link_hash_entry
758 struct elf_link_hash_entry elf;
760 /* Track dynamic relocs copied for this symbol. */
761 struct elf_dyn_relocs *dyn_relocs;
763 #define GOT_UNKNOWN 0
767 #define GOT_TLS_IE_POS 5
768 #define GOT_TLS_IE_NEG 6
769 #define GOT_TLS_IE_BOTH 7
770 #define GOT_TLS_GDESC 8
771 #define GOT_TLS_GD_BOTH_P(type) \
772 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
773 #define GOT_TLS_GD_P(type) \
774 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
775 #define GOT_TLS_GDESC_P(type) \
776 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
777 #define GOT_TLS_GD_ANY_P(type) \
778 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
779 unsigned char tls_type;
781 /* Symbol is referenced by R_386_GOTOFF relocation. */
782 unsigned int gotoff_ref : 1;
784 /* Symbol has GOT or PLT relocations. */
785 unsigned int has_got_reloc : 1;
787 /* Symbol has non-GOT/non-PLT relocations in text sections. */
788 unsigned int has_non_got_reloc : 1;
790 /* 0: symbol isn't ___tls_get_addr.
791 1: symbol is ___tls_get_addr.
792 2: symbol is unknown. */
793 unsigned int tls_get_addr : 2;
795 /* Reference count of C/C++ function pointer relocations in read-write
796 section which can be resolved at run-time. */
797 bfd_signed_vma func_pointer_refcount;
799 /* Information about the GOT PLT entry. Filled when there are both
800 GOT and PLT relocations against the same function. */
801 union gotplt_union plt_got;
803 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
804 starting at the end of the jump table. */
808 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
810 struct elf_i386_obj_tdata
812 struct elf_obj_tdata root;
814 /* tls_type for each local got entry. */
815 char *local_got_tls_type;
817 /* GOTPLT entries for TLS descriptors. */
818 bfd_vma *local_tlsdesc_gotent;
821 #define elf_i386_tdata(abfd) \
822 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
824 #define elf_i386_local_got_tls_type(abfd) \
825 (elf_i386_tdata (abfd)->local_got_tls_type)
827 #define elf_i386_local_tlsdesc_gotent(abfd) \
828 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
830 #define is_i386_elf(bfd) \
831 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
832 && elf_tdata (bfd) != NULL \
833 && elf_object_id (bfd) == I386_ELF_DATA)
836 elf_i386_mkobject (bfd *abfd)
838 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
842 /* i386 ELF linker hash table. */
844 struct elf_i386_link_hash_table
846 struct elf_link_hash_table elf;
848 /* Short-cuts to get to dynamic linker sections. */
852 asection *plt_eh_frame;
857 bfd_signed_vma refcount;
861 /* The amount of space used by the reserved portion of the sgotplt
862 section, plus whatever space is used by the jump slots. */
863 bfd_vma sgotplt_jump_table_size;
865 /* Small local sym cache. */
866 struct sym_cache sym_cache;
868 /* _TLS_MODULE_BASE_ symbol. */
869 struct bfd_link_hash_entry *tls_module_base;
871 /* Used by local STT_GNU_IFUNC symbols. */
872 htab_t loc_hash_table;
873 void * loc_hash_memory;
875 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
878 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
879 bfd_vma next_tls_desc_index;
881 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
882 bfd_vma next_jump_slot_index;
884 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
885 bfd_vma next_irelative_index;
887 /* TRUE if there are dynamic relocs against IFUNC symbols that apply
888 to read-only sections. */
889 bfd_boolean readonly_dynrelocs_against_ifunc;
892 /* Get the i386 ELF linker hash table from a link_info structure. */
894 #define elf_i386_hash_table(p) \
895 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
896 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
898 #define elf_i386_compute_jump_table_size(htab) \
899 ((htab)->elf.srelplt->reloc_count * 4)
901 /* Create an entry in an i386 ELF linker hash table. */
903 static struct bfd_hash_entry *
904 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
905 struct bfd_hash_table *table,
908 /* Allocate the structure if it has not already been allocated by a
912 entry = (struct bfd_hash_entry *)
913 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
918 /* Call the allocation method of the superclass. */
919 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
922 struct elf_i386_link_hash_entry *eh;
924 eh = (struct elf_i386_link_hash_entry *) entry;
925 eh->dyn_relocs = NULL;
926 eh->tls_type = GOT_UNKNOWN;
928 eh->has_got_reloc = 0;
929 eh->has_non_got_reloc = 0;
930 eh->tls_get_addr = 2;
931 eh->func_pointer_refcount = 0;
932 eh->plt_got.offset = (bfd_vma) -1;
933 eh->tlsdesc_got = (bfd_vma) -1;
939 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
940 for local symbol so that we can handle local STT_GNU_IFUNC symbols
941 as global symbol. We reuse indx and dynstr_index for local symbol
942 hash since they aren't used by global symbols in this backend. */
945 elf_i386_local_htab_hash (const void *ptr)
947 struct elf_link_hash_entry *h
948 = (struct elf_link_hash_entry *) ptr;
949 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
952 /* Compare local hash entries. */
955 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
957 struct elf_link_hash_entry *h1
958 = (struct elf_link_hash_entry *) ptr1;
959 struct elf_link_hash_entry *h2
960 = (struct elf_link_hash_entry *) ptr2;
962 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
965 /* Find and/or create a hash entry for local symbol. */
967 static struct elf_link_hash_entry *
968 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
969 bfd *abfd, const Elf_Internal_Rela *rel,
972 struct elf_i386_link_hash_entry e, *ret;
973 asection *sec = abfd->sections;
974 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
975 ELF32_R_SYM (rel->r_info));
978 e.elf.indx = sec->id;
979 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
980 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
981 create ? INSERT : NO_INSERT);
988 ret = (struct elf_i386_link_hash_entry *) *slot;
992 ret = (struct elf_i386_link_hash_entry *)
993 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
994 sizeof (struct elf_i386_link_hash_entry));
997 memset (ret, 0, sizeof (*ret));
998 ret->elf.indx = sec->id;
999 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
1000 ret->elf.dynindx = -1;
1001 ret->func_pointer_refcount = 0;
1002 ret->plt_got.offset = (bfd_vma) -1;
1008 /* Destroy an i386 ELF linker hash table. */
1011 elf_i386_link_hash_table_free (bfd *obfd)
1013 struct elf_i386_link_hash_table *htab
1014 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1016 if (htab->loc_hash_table)
1017 htab_delete (htab->loc_hash_table);
1018 if (htab->loc_hash_memory)
1019 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1020 _bfd_elf_link_hash_table_free (obfd);
1023 /* Create an i386 ELF linker hash table. */
1025 static struct bfd_link_hash_table *
1026 elf_i386_link_hash_table_create (bfd *abfd)
1028 struct elf_i386_link_hash_table *ret;
1029 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1031 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1035 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1036 elf_i386_link_hash_newfunc,
1037 sizeof (struct elf_i386_link_hash_entry),
1044 ret->loc_hash_table = htab_try_create (1024,
1045 elf_i386_local_htab_hash,
1046 elf_i386_local_htab_eq,
1048 ret->loc_hash_memory = objalloc_create ();
1049 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1051 elf_i386_link_hash_table_free (abfd);
1054 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1056 return &ret->elf.root;
1059 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1060 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1064 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1066 struct elf_i386_link_hash_table *htab;
1068 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1071 htab = elf_i386_hash_table (info);
1075 /* Set the contents of the .interp section to the interpreter. */
1076 if (bfd_link_executable (info) && !info->nointerp)
1078 asection *s = bfd_get_linker_section (dynobj, ".interp");
1081 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1082 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1086 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1090 if (bfd_link_executable (info))
1092 /* Always allow copy relocs for building executables. */
1093 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1096 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1097 s = bfd_make_section_anyway_with_flags (dynobj,
1099 (bed->dynamic_sec_flags
1102 || ! bfd_set_section_alignment (dynobj, s,
1103 bed->s->log_file_align))
1109 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1110 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1114 if (!info->no_ld_generated_unwind_info
1115 && htab->plt_eh_frame == NULL
1116 && htab->elf.splt != NULL)
1118 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1119 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1120 | SEC_LINKER_CREATED);
1122 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1123 if (htab->plt_eh_frame == NULL
1124 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1131 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1134 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1135 struct elf_link_hash_entry *dir,
1136 struct elf_link_hash_entry *ind)
1138 struct elf_i386_link_hash_entry *edir, *eind;
1140 edir = (struct elf_i386_link_hash_entry *) dir;
1141 eind = (struct elf_i386_link_hash_entry *) ind;
1143 if (eind->dyn_relocs != NULL)
1145 if (edir->dyn_relocs != NULL)
1147 struct elf_dyn_relocs **pp;
1148 struct elf_dyn_relocs *p;
1150 /* Add reloc counts against the indirect sym to the direct sym
1151 list. Merge any entries against the same section. */
1152 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1154 struct elf_dyn_relocs *q;
1156 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1157 if (q->sec == p->sec)
1159 q->pc_count += p->pc_count;
1160 q->count += p->count;
1167 *pp = edir->dyn_relocs;
1170 edir->dyn_relocs = eind->dyn_relocs;
1171 eind->dyn_relocs = NULL;
1174 if (ind->root.type == bfd_link_hash_indirect
1175 && dir->got.refcount <= 0)
1177 edir->tls_type = eind->tls_type;
1178 eind->tls_type = GOT_UNKNOWN;
1181 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1182 generate a R_386_COPY reloc. */
1183 edir->gotoff_ref |= eind->gotoff_ref;
1185 edir->has_got_reloc |= eind->has_got_reloc;
1186 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1188 if (ELIMINATE_COPY_RELOCS
1189 && ind->root.type != bfd_link_hash_indirect
1190 && dir->dynamic_adjusted)
1192 /* If called to transfer flags for a weakdef during processing
1193 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1194 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1195 dir->ref_dynamic |= ind->ref_dynamic;
1196 dir->ref_regular |= ind->ref_regular;
1197 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1198 dir->needs_plt |= ind->needs_plt;
1199 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1203 if (eind->func_pointer_refcount > 0)
1205 edir->func_pointer_refcount += eind->func_pointer_refcount;
1206 eind->func_pointer_refcount = 0;
1209 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1213 /* Return TRUE if the TLS access code sequence support transition
1217 elf_i386_check_tls_transition (asection *sec,
1219 Elf_Internal_Shdr *symtab_hdr,
1220 struct elf_link_hash_entry **sym_hashes,
1221 unsigned int r_type,
1222 const Elf_Internal_Rela *rel,
1223 const Elf_Internal_Rela *relend)
1225 unsigned int val, type, reg;
1226 unsigned long r_symndx;
1227 struct elf_link_hash_entry *h;
1230 bfd_boolean indirect_call, tls_get_addr;
1232 offset = rel->r_offset;
1237 if (offset < 2 || (rel + 1) >= relend)
1240 indirect_call = FALSE;
1241 call = contents + offset + 4;
1244 if (r_type == R_386_TLS_GD)
1246 /* Check transition from GD access model. Only
1247 leal foo@tlsgd(,%ebx,1), %eax
1248 call ___tls_get_addr@PLT
1250 leal foo@tlsgd(%ebx) %eax
1251 call ___tls_get_addr@PLT
1254 leal foo@tlsgd(%reg), %eax
1255 call *___tls_get_addr@GOT(%reg)
1256 which may be converted to
1257 addr32 call ___tls_get_addr
1258 can transit to different access model. */
1259 if ((offset + 10) > sec->size
1260 || (type != 0x8d && type != 0x04))
1265 /* leal foo@tlsgd(,%ebx,1), %eax
1266 call ___tls_get_addr@PLT */
1270 if (*(call - 7) != 0x8d
1278 leal foo@tlsgd(%ebx), %eax
1279 call ___tls_get_addr@PLT
1282 leal foo@tlsgd(%reg), %eax
1283 call *___tls_get_addr@GOT(%reg)
1284 which may be converted to
1285 addr32 call ___tls_get_addr
1287 %eax can't be used as the GOT base register since it
1288 is used to pass parameter to ___tls_get_addr. */
1290 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1293 indirect_call = call[0] == 0xff;
1294 if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90)
1295 && !(call[0] == 0x67 && call[1] == 0xe8)
1297 && (call[1] & 0xf8) == 0x90
1298 && (call[1] & 0x7) == reg))
1304 /* Check transition from LD access model. Only
1305 leal foo@tlsldm(%ebx), %eax
1306 call ___tls_get_addr@PLT
1308 leal foo@tlsldm(%reg), %eax
1309 call *___tls_get_addr@GOT(%reg)
1310 which may be converted to
1311 addr32 call ___tls_get_addr
1312 can transit to different access model. */
1313 if (type != 0x8d || (offset + 9) > sec->size)
1316 /* %eax can't be used as the GOT base register since it is
1317 used to pass parameter to ___tls_get_addr. */
1319 if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0)
1322 indirect_call = call[0] == 0xff;
1323 if (!(reg == 3 && call[0] == 0xe8)
1324 && !(call[0] == 0x67 && call[1] == 0xe8)
1326 && (call[1] & 0xf8) == 0x90
1327 && (call[1] & 0x7) == reg))
1331 r_symndx = ELF32_R_SYM (rel[1].r_info);
1332 if (r_symndx < symtab_hdr->sh_info)
1335 tls_get_addr = FALSE;
1336 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1337 if (h != NULL && h->root.root.string != NULL)
1339 struct elf_i386_link_hash_entry *eh
1340 = (struct elf_i386_link_hash_entry *) h;
1341 tls_get_addr = eh->tls_get_addr == 1;
1342 if (eh->tls_get_addr > 1)
1344 /* Use strncmp to check ___tls_get_addr since
1345 ___tls_get_addr may be versioned. */
1346 if (strncmp (h->root.root.string, "___tls_get_addr", 15)
1349 eh->tls_get_addr = 1;
1350 tls_get_addr = TRUE;
1353 eh->tls_get_addr = 0;
1359 else if (indirect_call)
1360 return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X);
1362 return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1363 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
1366 /* Check transition from IE access model:
1367 movl foo@indntpoff(%rip), %eax
1368 movl foo@indntpoff(%rip), %reg
1369 addl foo@indntpoff(%rip), %reg
1372 if (offset < 1 || (offset + 4) > sec->size)
1375 /* Check "movl foo@tpoff(%rip), %eax" first. */
1376 val = bfd_get_8 (abfd, contents + offset - 1);
1383 /* Check movl|addl foo@tpoff(%rip), %reg. */
1384 type = bfd_get_8 (abfd, contents + offset - 2);
1385 return ((type == 0x8b || type == 0x03)
1386 && (val & 0xc7) == 0x05);
1388 case R_386_TLS_GOTIE:
1389 case R_386_TLS_IE_32:
1390 /* Check transition from {IE_32,GOTIE} access model:
1391 subl foo@{tpoff,gontoff}(%reg1), %reg2
1392 movl foo@{tpoff,gontoff}(%reg1), %reg2
1393 addl foo@{tpoff,gontoff}(%reg1), %reg2
1396 if (offset < 2 || (offset + 4) > sec->size)
1399 val = bfd_get_8 (abfd, contents + offset - 1);
1400 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1403 type = bfd_get_8 (abfd, contents + offset - 2);
1404 return type == 0x8b || type == 0x2b || type == 0x03;
1406 case R_386_TLS_GOTDESC:
1407 /* Check transition from GDesc access model:
1408 leal x@tlsdesc(%ebx), %eax
1410 Make sure it's a leal adding ebx to a 32-bit offset
1411 into any register, although it's probably almost always
1414 if (offset < 2 || (offset + 4) > sec->size)
1417 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1420 val = bfd_get_8 (abfd, contents + offset - 1);
1421 return (val & 0xc7) == 0x83;
1423 case R_386_TLS_DESC_CALL:
1424 /* Check transition from GDesc access model:
1425 call *x@tlsdesc(%eax)
1427 if (offset + 2 <= sec->size)
1429 /* Make sure that it's a call *x@tlsdesc(%eax). */
1430 call = contents + offset;
1431 return call[0] == 0xff && call[1] == 0x10;
1441 /* Return TRUE if the TLS access transition is OK or no transition
1442 will be performed. Update R_TYPE if there is a transition. */
1445 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1446 asection *sec, bfd_byte *contents,
1447 Elf_Internal_Shdr *symtab_hdr,
1448 struct elf_link_hash_entry **sym_hashes,
1449 unsigned int *r_type, int tls_type,
1450 const Elf_Internal_Rela *rel,
1451 const Elf_Internal_Rela *relend,
1452 struct elf_link_hash_entry *h,
1453 unsigned long r_symndx,
1454 bfd_boolean from_relocate_section)
1456 unsigned int from_type = *r_type;
1457 unsigned int to_type = from_type;
1458 bfd_boolean check = TRUE;
1460 /* Skip TLS transition for functions. */
1462 && (h->type == STT_FUNC
1463 || h->type == STT_GNU_IFUNC))
1469 case R_386_TLS_GOTDESC:
1470 case R_386_TLS_DESC_CALL:
1471 case R_386_TLS_IE_32:
1473 case R_386_TLS_GOTIE:
1474 if (bfd_link_executable (info))
1477 to_type = R_386_TLS_LE_32;
1478 else if (from_type != R_386_TLS_IE
1479 && from_type != R_386_TLS_GOTIE)
1480 to_type = R_386_TLS_IE_32;
1483 /* When we are called from elf_i386_relocate_section, there may
1484 be additional transitions based on TLS_TYPE. */
1485 if (from_relocate_section)
1487 unsigned int new_to_type = to_type;
1489 if (bfd_link_executable (info)
1492 && (tls_type & GOT_TLS_IE))
1493 new_to_type = R_386_TLS_LE_32;
1495 if (to_type == R_386_TLS_GD
1496 || to_type == R_386_TLS_GOTDESC
1497 || to_type == R_386_TLS_DESC_CALL)
1499 if (tls_type == GOT_TLS_IE_POS)
1500 new_to_type = R_386_TLS_GOTIE;
1501 else if (tls_type & GOT_TLS_IE)
1502 new_to_type = R_386_TLS_IE_32;
1505 /* We checked the transition before when we were called from
1506 elf_i386_check_relocs. We only want to check the new
1507 transition which hasn't been checked before. */
1508 check = new_to_type != to_type && from_type == to_type;
1509 to_type = new_to_type;
1515 if (bfd_link_executable (info))
1516 to_type = R_386_TLS_LE_32;
1523 /* Return TRUE if there is no transition. */
1524 if (from_type == to_type)
1527 /* Check if the transition can be performed. */
1529 && ! elf_i386_check_tls_transition (sec, contents,
1530 symtab_hdr, sym_hashes,
1531 from_type, rel, relend))
1533 reloc_howto_type *from, *to;
1536 from = elf_i386_rtype_to_howto (abfd, from_type);
1537 to = elf_i386_rtype_to_howto (abfd, to_type);
1540 name = h->root.root.string;
1543 struct elf_i386_link_hash_table *htab;
1545 htab = elf_i386_hash_table (info);
1550 Elf_Internal_Sym *isym;
1552 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1554 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1558 (*_bfd_error_handler)
1559 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1560 "in section `%A' failed"),
1561 abfd, sec, from->name, to->name, name,
1562 (unsigned long) rel->r_offset);
1563 bfd_set_error (bfd_error_bad_value);
1571 /* With the local symbol, foo, we convert
1572 mov foo@GOT[(%reg1)], %reg2
1574 lea foo[@GOTOFF(%reg1)], %reg2
1576 call/jmp *foo@GOT[(%reg)]
1578 nop call foo/jmp foo nop
1579 When PIC is false, convert
1580 test %reg1, foo@GOT[(%reg2)]
1584 binop foo@GOT[(%reg1)], %reg2
1587 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
1592 elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr,
1594 Elf_Internal_Rela *irel,
1595 struct elf_link_hash_entry *h,
1596 bfd_boolean *converted,
1597 struct bfd_link_info *link_info)
1599 struct elf_i386_link_hash_table *htab;
1600 unsigned int opcode;
1602 bfd_boolean baseless;
1603 Elf_Internal_Sym *isym;
1604 unsigned int addend;
1608 bfd_boolean to_reloc_32;
1609 unsigned int r_type;
1610 unsigned int r_symndx;
1611 bfd_vma roff = irel->r_offset;
1616 /* Addend for R_386_GOT32X relocations must be 0. */
1617 addend = bfd_get_32 (abfd, contents + roff);
1621 htab = elf_i386_hash_table (link_info);
1622 is_pic = bfd_link_pic (link_info);
1624 r_type = ELF32_R_TYPE (irel->r_info);
1625 r_symndx = ELF32_R_SYM (irel->r_info);
1627 modrm = bfd_get_8 (abfd, contents + roff - 1);
1628 baseless = (modrm & 0xc7) == 0x5;
1630 if (baseless && is_pic)
1632 /* For PIC, disallow R_386_GOT32X without a base register
1633 since we don't know what the GOT base is. */
1638 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
1640 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1643 name = h->root.root.string;
1645 (*_bfd_error_handler)
1646 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
1651 opcode = bfd_get_8 (abfd, contents + roff - 2);
1653 /* Convert to R_386_32 if PIC is false or there is no base
1655 to_reloc_32 = !is_pic || baseless;
1657 /* Try to convert R_386_GOT32X. Get the symbol referred to by the
1661 if (opcode == 0x0ff)
1662 /* Convert "call/jmp *foo@GOT[(%reg)]". */
1663 goto convert_branch;
1665 /* Convert "mov foo@GOT[(%reg1)], %reg2",
1666 "test %reg1, foo@GOT(%reg2)" and
1667 "binop foo@GOT[(%reg1)], %reg2". */
1671 /* Undefined weak symbol is only bound locally in executable
1672 and its reference is resolved as 0. */
1673 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE,
1674 elf_i386_hash_entry (h)))
1678 /* No direct branch to 0 for PIC. */
1682 goto convert_branch;
1686 /* We can convert load of address 0 to R_386_32. */
1694 /* We have "call/jmp *foo@GOT[(%reg)]". */
1695 if ((h->root.type == bfd_link_hash_defined
1696 || h->root.type == bfd_link_hash_defweak)
1697 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1699 /* The function is locally defined. */
1701 /* Convert R_386_GOT32X to R_386_PC32. */
1702 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
1704 struct elf_i386_link_hash_entry *eh
1705 = (struct elf_i386_link_hash_entry *) h;
1707 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
1710 /* To support TLS optimization, always use addr32 prefix
1711 for "call *___tls_get_addr@GOT(%reg)". */
1712 if (eh && eh->tls_get_addr == 1)
1715 nop_offset = irel->r_offset - 2;
1719 nop = link_info->call_nop_byte;
1720 if (link_info->call_nop_as_suffix)
1722 nop_offset = roff + 3;
1723 irel->r_offset -= 1;
1726 nop_offset = roff - 2;
1731 /* Convert to "jmp foo nop". */
1734 nop_offset = roff + 3;
1735 irel->r_offset -= 1;
1738 bfd_put_8 (abfd, nop, contents + nop_offset);
1739 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
1740 /* When converting to PC-relative relocation, we
1741 need to adjust addend by -4. */
1742 bfd_put_32 (abfd, -4, contents + irel->r_offset);
1743 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
1750 /* We have "mov foo@GOT[(%re1g)], %reg2",
1751 "test %reg1, foo@GOT(%reg2)" and
1752 "binop foo@GOT[(%reg1)], %reg2".
1754 Avoid optimizing _DYNAMIC since ld.so may use its
1755 link-time address. */
1756 if (h == htab->elf.hdynamic)
1759 /* def_regular is set by an assignment in a linker script in
1760 bfd_elf_record_link_assignment. */
1762 || h->root.type == bfd_link_hash_defined
1763 || h->root.type == bfd_link_hash_defweak)
1764 && SYMBOL_REFERENCES_LOCAL (link_info, h))
1771 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
1772 "mov $foo, %reg2" with R_386_32. */
1774 modrm = 0xc0 | (modrm & 0x38) >> 3;
1775 bfd_put_8 (abfd, modrm, contents + roff - 1);
1780 /* Convert "mov foo@GOT(%reg1), %reg2" to
1781 "lea foo@GOTOFF(%reg1), %reg2". */
1782 r_type = R_386_GOTOFF;
1788 /* Only R_386_32 is supported. */
1794 /* Convert "test %reg1, foo@GOT(%reg2)" to
1795 "test $foo, %reg1". */
1796 modrm = 0xc0 | (modrm & 0x38) >> 3;
1801 /* Convert "binop foo@GOT(%reg1), %reg2" to
1802 "binop $foo, %reg2". */
1804 | (modrm & 0x38) >> 3
1808 bfd_put_8 (abfd, modrm, contents + roff - 1);
1812 bfd_put_8 (abfd, opcode, contents + roff - 2);
1813 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
1822 /* Rename some of the generic section flags to better document how they
1824 #define need_convert_load sec_flg0
1825 #define check_relocs_failed sec_flg1
1827 /* Look through the relocs for a section during the first phase, and
1828 calculate needed space in the global offset table, procedure linkage
1829 table, and dynamic reloc sections. */
1832 elf_i386_check_relocs (bfd *abfd,
1833 struct bfd_link_info *info,
1835 const Elf_Internal_Rela *relocs)
1837 struct elf_i386_link_hash_table *htab;
1838 Elf_Internal_Shdr *symtab_hdr;
1839 struct elf_link_hash_entry **sym_hashes;
1840 const Elf_Internal_Rela *rel;
1841 const Elf_Internal_Rela *rel_end;
1844 bfd_boolean use_plt_got;
1846 if (bfd_link_relocatable (info))
1849 /* Don't do anything special with non-loaded, non-alloced sections.
1850 In particular, any relocs in such sections should not affect GOT
1851 and PLT reference counting (ie. we don't allow them to create GOT
1852 or PLT entries), there's no possibility or desire to optimize TLS
1853 relocs, and there's not much point in propagating relocs to shared
1854 libs that the dynamic linker won't relocate. */
1855 if ((sec->flags & SEC_ALLOC) == 0)
1858 BFD_ASSERT (is_i386_elf (abfd));
1860 htab = elf_i386_hash_table (info);
1863 sec->check_relocs_failed = 1;
1867 /* Get the section contents. */
1868 if (elf_section_data (sec)->this_hdr.contents != NULL)
1869 contents = elf_section_data (sec)->this_hdr.contents;
1870 else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1872 sec->check_relocs_failed = 1;
1876 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1877 && (get_elf_i386_backend_data (abfd)
1878 == &elf_i386_arch_bed));
1880 symtab_hdr = &elf_symtab_hdr (abfd);
1881 sym_hashes = elf_sym_hashes (abfd);
1885 rel_end = relocs + sec->reloc_count;
1886 for (rel = relocs; rel < rel_end; rel++)
1888 unsigned int r_type;
1889 unsigned long r_symndx;
1890 struct elf_link_hash_entry *h;
1891 struct elf_i386_link_hash_entry *eh;
1892 Elf_Internal_Sym *isym;
1894 bfd_boolean size_reloc;
1896 r_symndx = ELF32_R_SYM (rel->r_info);
1897 r_type = ELF32_R_TYPE (rel->r_info);
1899 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1901 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1907 if (r_symndx < symtab_hdr->sh_info)
1909 /* A local symbol. */
1910 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1915 /* Check relocation against local STT_GNU_IFUNC symbol. */
1916 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1918 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1922 /* Fake a STT_GNU_IFUNC symbol. */
1923 h->type = STT_GNU_IFUNC;
1926 h->forced_local = 1;
1927 h->root.type = bfd_link_hash_defined;
1935 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1936 while (h->root.type == bfd_link_hash_indirect
1937 || h->root.type == bfd_link_hash_warning)
1938 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1941 eh = (struct elf_i386_link_hash_entry *) h;
1956 if (htab->elf.dynobj == NULL)
1957 htab->elf.dynobj = abfd;
1958 /* Create the ifunc sections for static executables. */
1959 if (h->type == STT_GNU_IFUNC
1960 && !_bfd_elf_create_ifunc_sections (htab->elf.dynobj,
1966 /* It is referenced by a non-shared object. */
1968 h->root.non_ir_ref = 1;
1970 if (h->type == STT_GNU_IFUNC)
1971 elf_tdata (info->output_bfd)->has_gnu_symbols
1972 |= elf_gnu_symbol_ifunc;
1975 if (! elf_i386_tls_transition (info, abfd, sec, contents,
1976 symtab_hdr, sym_hashes,
1977 &r_type, GOT_UNKNOWN,
1978 rel, rel_end, h, r_symndx, FALSE))
1984 htab->tls_ldm_got.refcount += 1;
1988 /* This symbol requires a procedure linkage table entry. We
1989 actually build the entry in adjust_dynamic_symbol,
1990 because this might be a case of linking PIC code which is
1991 never referenced by a dynamic object, in which case we
1992 don't need to generate a procedure linkage table entry
1995 /* If this is a local symbol, we resolve it directly without
1996 creating a procedure linkage table entry. */
2000 eh->has_got_reloc = 1;
2002 h->plt.refcount += 1;
2009 case R_386_TLS_IE_32:
2011 case R_386_TLS_GOTIE:
2012 if (!bfd_link_executable (info))
2013 info->flags |= DF_STATIC_TLS;
2019 case R_386_TLS_GOTDESC:
2020 case R_386_TLS_DESC_CALL:
2021 /* This symbol requires a global offset table entry. */
2023 int tls_type, old_tls_type;
2030 tls_type = GOT_NORMAL;
2032 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
2033 case R_386_TLS_GOTDESC:
2034 case R_386_TLS_DESC_CALL:
2035 tls_type = GOT_TLS_GDESC; break;
2036 case R_386_TLS_IE_32:
2037 if (ELF32_R_TYPE (rel->r_info) == r_type)
2038 tls_type = GOT_TLS_IE_NEG;
2040 /* If this is a GD->IE transition, we may use either of
2041 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
2042 tls_type = GOT_TLS_IE;
2045 case R_386_TLS_GOTIE:
2046 tls_type = GOT_TLS_IE_POS; break;
2051 h->got.refcount += 1;
2052 old_tls_type = elf_i386_hash_entry(h)->tls_type;
2056 bfd_signed_vma *local_got_refcounts;
2058 /* This is a global offset table entry for a local symbol. */
2059 local_got_refcounts = elf_local_got_refcounts (abfd);
2060 if (local_got_refcounts == NULL)
2064 size = symtab_hdr->sh_info;
2065 size *= (sizeof (bfd_signed_vma)
2066 + sizeof (bfd_vma) + sizeof(char));
2067 local_got_refcounts = (bfd_signed_vma *)
2068 bfd_zalloc (abfd, size);
2069 if (local_got_refcounts == NULL)
2071 elf_local_got_refcounts (abfd) = local_got_refcounts;
2072 elf_i386_local_tlsdesc_gotent (abfd)
2073 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
2074 elf_i386_local_got_tls_type (abfd)
2075 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
2077 local_got_refcounts[r_symndx] += 1;
2078 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
2081 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
2082 tls_type |= old_tls_type;
2083 /* If a TLS symbol is accessed using IE at least once,
2084 there is no point to use dynamic model for it. */
2085 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
2086 && (! GOT_TLS_GD_ANY_P (old_tls_type)
2087 || (tls_type & GOT_TLS_IE) == 0))
2089 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
2090 tls_type = old_tls_type;
2091 else if (GOT_TLS_GD_ANY_P (old_tls_type)
2092 && GOT_TLS_GD_ANY_P (tls_type))
2093 tls_type |= old_tls_type;
2097 name = h->root.root.string;
2099 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
2101 (*_bfd_error_handler)
2102 (_("%B: `%s' accessed both as normal and "
2103 "thread local symbol"),
2105 bfd_set_error (bfd_error_bad_value);
2110 if (old_tls_type != tls_type)
2113 elf_i386_hash_entry (h)->tls_type = tls_type;
2115 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
2123 if (htab->elf.sgot == NULL)
2125 if (htab->elf.dynobj == NULL)
2126 htab->elf.dynobj = abfd;
2127 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
2130 if (r_type != R_386_TLS_IE)
2133 eh->has_got_reloc = 1;
2138 case R_386_TLS_LE_32:
2141 eh->has_got_reloc = 1;
2142 if (bfd_link_executable (info))
2144 info->flags |= DF_STATIC_TLS;
2149 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
2150 eh->has_non_got_reloc = 1;
2152 /* We are called after all symbols have been resolved. Only
2153 relocation against STT_GNU_IFUNC symbol must go through
2156 && (bfd_link_executable (info)
2157 || h->type == STT_GNU_IFUNC))
2159 /* If this reloc is in a read-only section, we might
2160 need a copy reloc. We can't check reliably at this
2161 stage whether the section is read-only, as input
2162 sections have not yet been mapped to output sections.
2163 Tentatively set the flag for now, and correct in
2164 adjust_dynamic_symbol. */
2167 /* We may need a .plt entry if the symbol is a function
2168 defined in a shared lib or is a STT_GNU_IFUNC function
2169 referenced from the code or read-only section. */
2171 || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0)
2172 h->plt.refcount += 1;
2174 if (r_type == R_386_PC32)
2176 /* Since something like ".long foo - ." may be used
2177 as pointer, make sure that PLT is used if foo is
2178 a function defined in a shared library. */
2179 if ((sec->flags & SEC_CODE) == 0)
2180 h->pointer_equality_needed = 1;
2184 h->pointer_equality_needed = 1;
2185 /* R_386_32 can be resolved at run-time. */
2186 if (r_type == R_386_32
2187 && (sec->flags & SEC_READONLY) == 0)
2188 eh->func_pointer_refcount += 1;
2194 /* If we are creating a shared library, and this is a reloc
2195 against a global symbol, or a non PC relative reloc
2196 against a local symbol, then we need to copy the reloc
2197 into the shared library. However, if we are linking with
2198 -Bsymbolic, we do not need to copy a reloc against a
2199 global symbol which is defined in an object we are
2200 including in the link (i.e., DEF_REGULAR is set). At
2201 this point we have not seen all the input files, so it is
2202 possible that DEF_REGULAR is not set now but will be set
2203 later (it is never cleared). In case of a weak definition,
2204 DEF_REGULAR may be cleared later by a strong definition in
2205 a shared library. We account for that possibility below by
2206 storing information in the relocs_copied field of the hash
2207 table entry. A similar situation occurs when creating
2208 shared libraries and symbol visibility changes render the
2211 If on the other hand, we are creating an executable, we
2212 may need to keep relocations for symbols satisfied by a
2213 dynamic library if we manage to avoid copy relocs for the
2216 Generate dynamic pointer relocation against STT_GNU_IFUNC
2217 symbol in the non-code section. */
2218 if ((bfd_link_pic (info)
2219 && (r_type != R_386_PC32
2221 && (! (bfd_link_pie (info)
2222 || SYMBOLIC_BIND (info, h))
2223 || h->root.type == bfd_link_hash_defweak
2224 || !h->def_regular))))
2226 && h->type == STT_GNU_IFUNC
2227 && r_type == R_386_32
2228 && (sec->flags & SEC_CODE) == 0)
2229 || (ELIMINATE_COPY_RELOCS
2230 && !bfd_link_pic (info)
2232 && (h->root.type == bfd_link_hash_defweak
2233 || !h->def_regular)))
2235 struct elf_dyn_relocs *p;
2236 struct elf_dyn_relocs **head;
2238 /* We must copy these reloc types into the output file.
2239 Create a reloc section in dynobj and make room for
2243 if (htab->elf.dynobj == NULL)
2244 htab->elf.dynobj = abfd;
2246 sreloc = _bfd_elf_make_dynamic_reloc_section
2247 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
2253 /* If this is a global symbol, we count the number of
2254 relocations we need for this symbol. */
2257 head = &eh->dyn_relocs;
2261 /* Track dynamic relocs needed for local syms too.
2262 We really need local syms available to do this
2267 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2272 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
2276 vpp = &elf_section_data (s)->local_dynrel;
2277 head = (struct elf_dyn_relocs **)vpp;
2281 if (p == NULL || p->sec != sec)
2283 bfd_size_type amt = sizeof *p;
2284 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
2296 /* Count size relocation as PC-relative relocation. */
2297 if (r_type == R_386_PC32 || size_reloc)
2302 /* This relocation describes the C++ object vtable hierarchy.
2303 Reconstruct it for later use during GC. */
2304 case R_386_GNU_VTINHERIT:
2305 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2309 /* This relocation describes which C++ vtable entries are actually
2310 used. Record for later use during GC. */
2311 case R_386_GNU_VTENTRY:
2312 BFD_ASSERT (h != NULL);
2314 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
2324 && h->plt.refcount > 0
2325 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2326 || h->got.refcount > 0)
2327 && htab->plt_got == NULL)
2329 /* Create the GOT procedure linkage table. */
2330 unsigned int plt_got_align;
2331 const struct elf_backend_data *bed;
2333 bed = get_elf_backend_data (info->output_bfd);
2334 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
2335 && (sizeof (elf_i386_got_plt_entry)
2336 == sizeof (elf_i386_pic_got_plt_entry)));
2339 if (htab->elf.dynobj == NULL)
2340 htab->elf.dynobj = abfd;
2342 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2344 (bed->dynamic_sec_flags
2349 if (htab->plt_got == NULL
2350 || !bfd_set_section_alignment (htab->elf.dynobj,
2356 if (r_type == R_386_GOT32X
2357 && (h == NULL || h->type != STT_GNU_IFUNC))
2358 sec->need_convert_load = 1;
2361 if (elf_section_data (sec)->this_hdr.contents != contents)
2363 if (!info->keep_memory)
2367 /* Cache the section contents for elf_link_input_bfd. */
2368 elf_section_data (sec)->this_hdr.contents = contents;
2375 if (elf_section_data (sec)->this_hdr.contents != contents)
2377 sec->check_relocs_failed = 1;
2381 /* Return the section that should be marked against GC for a given
2385 elf_i386_gc_mark_hook (asection *sec,
2386 struct bfd_link_info *info,
2387 Elf_Internal_Rela *rel,
2388 struct elf_link_hash_entry *h,
2389 Elf_Internal_Sym *sym)
2392 switch (ELF32_R_TYPE (rel->r_info))
2394 case R_386_GNU_VTINHERIT:
2395 case R_386_GNU_VTENTRY:
2399 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2402 /* Remove undefined weak symbol from the dynamic symbol table if it
2403 is resolved to 0. */
2406 elf_i386_fixup_symbol (struct bfd_link_info *info,
2407 struct elf_link_hash_entry *h)
2409 if (h->dynindx != -1
2410 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2411 elf_i386_hash_entry (h)->has_got_reloc,
2412 elf_i386_hash_entry (h)))
2415 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2421 /* Adjust a symbol defined by a dynamic object and referenced by a
2422 regular object. The current definition is in some section of the
2423 dynamic object, but we're not including those sections. We have to
2424 change the definition to something the rest of the link can
2428 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2429 struct elf_link_hash_entry *h)
2431 struct elf_i386_link_hash_table *htab;
2433 struct elf_i386_link_hash_entry *eh;
2434 struct elf_dyn_relocs *p;
2436 /* STT_GNU_IFUNC symbol must go through PLT. */
2437 if (h->type == STT_GNU_IFUNC)
2439 /* All local STT_GNU_IFUNC references must be treate as local
2440 calls via local PLT. */
2442 && SYMBOL_CALLS_LOCAL (info, h))
2444 bfd_size_type pc_count = 0, count = 0;
2445 struct elf_dyn_relocs **pp;
2447 eh = (struct elf_i386_link_hash_entry *) h;
2448 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2450 pc_count += p->pc_count;
2451 p->count -= p->pc_count;
2460 if (pc_count || count)
2465 /* Increment PLT reference count only for PC-relative
2468 if (h->plt.refcount <= 0)
2469 h->plt.refcount = 1;
2471 h->plt.refcount += 1;
2476 if (h->plt.refcount <= 0)
2478 h->plt.offset = (bfd_vma) -1;
2484 /* If this is a function, put it in the procedure linkage table. We
2485 will fill in the contents of the procedure linkage table later,
2486 when we know the address of the .got section. */
2487 if (h->type == STT_FUNC
2490 if (h->plt.refcount <= 0
2491 || SYMBOL_CALLS_LOCAL (info, h)
2492 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2493 && h->root.type == bfd_link_hash_undefweak))
2495 /* This case can occur if we saw a PLT32 reloc in an input
2496 file, but the symbol was never referred to by a dynamic
2497 object, or if all references were garbage collected. In
2498 such a case, we don't actually need to build a procedure
2499 linkage table, and we can just do a PC32 reloc instead. */
2500 h->plt.offset = (bfd_vma) -1;
2507 /* It's possible that we incorrectly decided a .plt reloc was
2508 needed for an R_386_PC32 reloc to a non-function sym in
2509 check_relocs. We can't decide accurately between function and
2510 non-function syms in check-relocs; Objects loaded later in
2511 the link may change h->type. So fix it now. */
2512 h->plt.offset = (bfd_vma) -1;
2514 /* If this is a weak symbol, and there is a real definition, the
2515 processor independent code will have arranged for us to see the
2516 real definition first, and we can just use the same value. */
2517 if (h->u.weakdef != NULL)
2519 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2520 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2521 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2522 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2523 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2524 h->non_got_ref = h->u.weakdef->non_got_ref;
2528 /* This is a reference to a symbol defined by a dynamic object which
2529 is not a function. */
2531 /* If we are creating a shared library, we must presume that the
2532 only references to the symbol are via the global offset table.
2533 For such cases we need not do anything here; the relocations will
2534 be handled correctly by relocate_section. */
2535 if (!bfd_link_executable (info))
2538 /* If there are no references to this symbol that do not use the
2539 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2541 eh = (struct elf_i386_link_hash_entry *) h;
2542 if (!h->non_got_ref && !eh->gotoff_ref)
2545 /* If -z nocopyreloc was given, we won't generate them either. */
2546 if (info->nocopyreloc)
2552 htab = elf_i386_hash_table (info);
2556 /* If there aren't any dynamic relocs in read-only sections nor
2557 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2558 avoid the copy reloc. This doesn't work on VxWorks, where we can
2559 not have dynamic relocations (other than copy and jump slot
2560 relocations) in an executable. */
2561 if (ELIMINATE_COPY_RELOCS
2563 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2565 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2567 s = p->sec->output_section;
2568 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2579 /* We must allocate the symbol in our .dynbss section, which will
2580 become part of the .bss section of the executable. There will be
2581 an entry for this symbol in the .dynsym section. The dynamic
2582 object will contain position independent code, so all references
2583 from the dynamic object to this symbol will go through the global
2584 offset table. The dynamic linker will use the .dynsym entry to
2585 determine the address it must put in the global offset table, so
2586 both the dynamic object and the regular object will refer to the
2587 same memory location for the variable. */
2589 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2590 copy the initial value out of the dynamic object and into the
2591 runtime process image. */
2592 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2594 htab->srelbss->size += sizeof (Elf32_External_Rel);
2600 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2603 /* Allocate space in .plt, .got and associated reloc sections for
2607 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2609 struct bfd_link_info *info;
2610 struct elf_i386_link_hash_table *htab;
2611 struct elf_i386_link_hash_entry *eh;
2612 struct elf_dyn_relocs *p;
2613 unsigned plt_entry_size;
2614 bfd_boolean resolved_to_zero;
2616 if (h->root.type == bfd_link_hash_indirect)
2619 eh = (struct elf_i386_link_hash_entry *) h;
2621 info = (struct bfd_link_info *) inf;
2622 htab = elf_i386_hash_table (info);
2626 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2628 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2632 /* Clear the reference count of function pointer relocations if
2633 symbol isn't a normal function. */
2634 if (h->type != STT_FUNC)
2635 eh->func_pointer_refcount = 0;
2637 /* We can't use the GOT PLT if pointer equality is needed since
2638 finish_dynamic_symbol won't clear symbol value and the dynamic
2639 linker won't update the GOT slot. We will get into an infinite
2640 loop at run-time. */
2641 if (htab->plt_got != NULL
2642 && h->type != STT_GNU_IFUNC
2643 && !h->pointer_equality_needed
2644 && h->plt.refcount > 0
2645 && h->got.refcount > 0)
2647 /* Don't use the regular PLT if there are both GOT and GOTPLT
2649 h->plt.offset = (bfd_vma) -1;
2651 /* Use the GOT PLT. */
2652 eh->plt_got.refcount = 1;
2655 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2656 here if it is defined and referenced in a non-shared object. */
2657 if (h->type == STT_GNU_IFUNC
2659 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2660 &htab->readonly_dynrelocs_against_ifunc,
2662 plt_entry_size, 4, TRUE);
2663 /* Don't create the PLT entry if there are only function pointer
2664 relocations which can be resolved at run-time. */
2665 else if (htab->elf.dynamic_sections_created
2666 && (h->plt.refcount > eh->func_pointer_refcount
2667 || eh->plt_got.refcount > 0))
2669 bfd_boolean use_plt_got;
2671 /* Clear the reference count of function pointer relocations
2673 eh->func_pointer_refcount = 0;
2675 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2677 /* Don't use the regular PLT for DF_BIND_NOW. */
2678 h->plt.offset = (bfd_vma) -1;
2680 /* Use the GOT PLT. */
2681 h->got.refcount = 1;
2682 eh->plt_got.refcount = 1;
2685 use_plt_got = eh->plt_got.refcount > 0;
2687 /* Make sure this symbol is output as a dynamic symbol.
2688 Undefined weak syms won't yet be marked as dynamic. */
2689 if (h->dynindx == -1
2691 && !resolved_to_zero)
2693 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2697 if (bfd_link_pic (info)
2698 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2700 asection *s = htab->elf.splt;
2701 asection *got_s = htab->plt_got;
2703 /* If this is the first .plt entry, make room for the special
2704 first entry. The .plt section is used by prelink to undo
2705 prelinking for dynamic relocations. */
2707 s->size = plt_entry_size;
2710 eh->plt_got.offset = got_s->size;
2712 h->plt.offset = s->size;
2714 /* If this symbol is not defined in a regular file, and we are
2715 not generating a shared library, then set the symbol to this
2716 location in the .plt. This is required to make function
2717 pointers compare as equal between the normal executable and
2718 the shared library. */
2719 if (! bfd_link_pic (info)
2724 /* We need to make a call to the entry of the GOT PLT
2725 instead of regular PLT entry. */
2726 h->root.u.def.section = got_s;
2727 h->root.u.def.value = eh->plt_got.offset;
2731 h->root.u.def.section = s;
2732 h->root.u.def.value = h->plt.offset;
2736 /* Make room for this entry. */
2738 got_s->size += sizeof (elf_i386_got_plt_entry);
2741 s->size += plt_entry_size;
2743 /* We also need to make an entry in the .got.plt section,
2744 which will be placed in the .got section by the linker
2746 htab->elf.sgotplt->size += 4;
2748 /* There should be no PLT relocation against resolved
2749 undefined weak symbol in executable. */
2750 if (!resolved_to_zero)
2752 /* We also need to make an entry in the .rel.plt
2754 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2755 htab->elf.srelplt->reloc_count++;
2759 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2760 && !bfd_link_pic (info))
2762 /* VxWorks has a second set of relocations for each PLT entry
2763 in executables. They go in a separate relocation section,
2764 which is processed by the kernel loader. */
2766 /* There are two relocations for the initial PLT entry: an
2767 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2768 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2770 if (h->plt.offset == plt_entry_size)
2771 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2773 /* There are two extra relocations for each subsequent PLT entry:
2774 an R_386_32 relocation for the GOT entry, and an R_386_32
2775 relocation for the PLT entry. */
2777 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2782 eh->plt_got.offset = (bfd_vma) -1;
2783 h->plt.offset = (bfd_vma) -1;
2789 eh->plt_got.offset = (bfd_vma) -1;
2790 h->plt.offset = (bfd_vma) -1;
2794 eh->tlsdesc_got = (bfd_vma) -1;
2796 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2797 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2798 if (h->got.refcount > 0
2799 && bfd_link_executable (info)
2801 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2802 h->got.offset = (bfd_vma) -1;
2803 else if (h->got.refcount > 0)
2807 int tls_type = elf_i386_hash_entry(h)->tls_type;
2809 /* Make sure this symbol is output as a dynamic symbol.
2810 Undefined weak syms won't yet be marked as dynamic. */
2811 if (h->dynindx == -1
2813 && !resolved_to_zero)
2815 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2820 if (GOT_TLS_GDESC_P (tls_type))
2822 eh->tlsdesc_got = htab->elf.sgotplt->size
2823 - elf_i386_compute_jump_table_size (htab);
2824 htab->elf.sgotplt->size += 8;
2825 h->got.offset = (bfd_vma) -2;
2827 if (! GOT_TLS_GDESC_P (tls_type)
2828 || GOT_TLS_GD_P (tls_type))
2830 h->got.offset = s->size;
2832 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2833 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2836 dyn = htab->elf.dynamic_sections_created;
2837 /* R_386_TLS_IE_32 needs one dynamic relocation,
2838 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2839 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2840 need two), R_386_TLS_GD needs one if local symbol and two if
2841 global. No dynamic relocation against resolved undefined weak
2842 symbol in executable. */
2843 if (tls_type == GOT_TLS_IE_BOTH)
2844 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2845 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2846 || (tls_type & GOT_TLS_IE))
2847 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2848 else if (GOT_TLS_GD_P (tls_type))
2849 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2850 else if (! GOT_TLS_GDESC_P (tls_type)
2851 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2852 && !resolved_to_zero)
2853 || h->root.type != bfd_link_hash_undefweak)
2854 && (bfd_link_pic (info)
2855 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2856 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2857 if (GOT_TLS_GDESC_P (tls_type))
2858 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2861 h->got.offset = (bfd_vma) -1;
2863 if (eh->dyn_relocs == NULL)
2866 /* In the shared -Bsymbolic case, discard space allocated for
2867 dynamic pc-relative relocs against symbols which turn out to be
2868 defined in regular objects. For the normal shared case, discard
2869 space for pc-relative relocs that have become local due to symbol
2870 visibility changes. */
2872 if (bfd_link_pic (info))
2874 /* The only reloc that uses pc_count is R_386_PC32, which will
2875 appear on a call or on something like ".long foo - .". We
2876 want calls to protected symbols to resolve directly to the
2877 function rather than going via the plt. If people want
2878 function pointer comparisons to work as expected then they
2879 should avoid writing assembly like ".long foo - .". */
2880 if (SYMBOL_CALLS_LOCAL (info, h))
2882 struct elf_dyn_relocs **pp;
2884 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2886 p->count -= p->pc_count;
2895 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2897 struct elf_dyn_relocs **pp;
2898 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2900 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2907 /* Also discard relocs on undefined weak syms with non-default
2908 visibility or in PIE. */
2909 if (eh->dyn_relocs != NULL
2910 && h->root.type == bfd_link_hash_undefweak)
2912 /* Undefined weak symbol is never bound locally in shared
2914 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2915 || resolved_to_zero)
2919 /* Keep dynamic non-GOT/non-PLT relocation so that we
2920 can branch to 0 without PLT. */
2921 struct elf_dyn_relocs **pp;
2923 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2924 if (p->pc_count == 0)
2928 /* Remove non-R_386_PC32 relocation. */
2929 p->count = p->pc_count;
2933 if (eh->dyn_relocs != NULL)
2935 /* Make sure undefined weak symbols are output
2936 as dynamic symbols in PIEs for dynamic non-GOT
2937 non-PLT reloations. */
2938 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2943 eh->dyn_relocs = NULL;
2945 else if (h->dynindx == -1
2946 && !h->forced_local)
2948 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2953 else if (ELIMINATE_COPY_RELOCS)
2955 /* For the non-shared case, discard space for relocs against
2956 symbols which turn out to need copy relocs or are not
2957 dynamic. Keep dynamic relocations for run-time function
2958 pointer initialization. */
2960 if ((!h->non_got_ref
2961 || eh->func_pointer_refcount > 0
2962 || (h->root.type == bfd_link_hash_undefweak
2963 && !resolved_to_zero))
2966 || (htab->elf.dynamic_sections_created
2967 && (h->root.type == bfd_link_hash_undefweak
2968 || h->root.type == bfd_link_hash_undefined))))
2970 /* Make sure this symbol is output as a dynamic symbol.
2971 Undefined weak syms won't yet be marked as dynamic. */
2972 if (h->dynindx == -1
2974 && !resolved_to_zero)
2976 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2980 /* If that succeeded, we know we'll be keeping all the
2982 if (h->dynindx != -1)
2986 eh->dyn_relocs = NULL;
2987 eh->func_pointer_refcount = 0;
2992 /* Finally, allocate space. */
2993 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2997 sreloc = elf_section_data (p->sec)->sreloc;
2999 BFD_ASSERT (sreloc != NULL);
3000 sreloc->size += p->count * sizeof (Elf32_External_Rel);
3006 /* Allocate space in .plt, .got and associated reloc sections for
3007 local dynamic relocs. */
3010 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
3012 struct elf_link_hash_entry *h
3013 = (struct elf_link_hash_entry *) *slot;
3015 if (h->type != STT_GNU_IFUNC
3019 || h->root.type != bfd_link_hash_defined)
3022 return elf_i386_allocate_dynrelocs (h, inf);
3025 /* Find any dynamic relocs that apply to read-only sections. */
3028 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
3030 struct elf_i386_link_hash_entry *eh;
3031 struct elf_dyn_relocs *p;
3033 /* Skip local IFUNC symbols. */
3034 if (h->forced_local && h->type == STT_GNU_IFUNC)
3037 eh = (struct elf_i386_link_hash_entry *) h;
3038 for (p = eh->dyn_relocs; p != NULL; p = p->next)
3040 asection *s = p->sec->output_section;
3042 if (s != NULL && (s->flags & SEC_READONLY) != 0)
3044 struct bfd_link_info *info = (struct bfd_link_info *) inf;
3046 info->flags |= DF_TEXTREL;
3048 if ((info->warn_shared_textrel && bfd_link_pic (info))
3049 || info->error_textrel)
3050 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
3051 p->sec->owner, h->root.root.string,
3054 /* Not an error, just cut short the traversal. */
3061 /* Convert load via the GOT slot to load immediate. */
3064 elf_i386_convert_load (bfd *abfd, asection *sec,
3065 struct bfd_link_info *link_info)
3067 struct elf_i386_link_hash_table *htab;
3068 Elf_Internal_Shdr *symtab_hdr;
3069 Elf_Internal_Rela *internal_relocs;
3070 Elf_Internal_Rela *irel, *irelend;
3072 bfd_boolean changed;
3073 bfd_signed_vma *local_got_refcounts;
3075 /* Don't even try to convert non-ELF outputs. */
3076 if (!is_elf_hash_table (link_info->hash))
3079 /* Nothing to do if there is no need or no output. */
3080 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
3081 || sec->need_convert_load == 0
3082 || bfd_is_abs_section (sec->output_section))
3085 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3087 /* Load the relocations for this section. */
3088 internal_relocs = (_bfd_elf_link_read_relocs
3089 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
3090 link_info->keep_memory));
3091 if (internal_relocs == NULL)
3095 htab = elf_i386_hash_table (link_info);
3096 local_got_refcounts = elf_local_got_refcounts (abfd);
3098 /* Get the section contents. */
3099 if (elf_section_data (sec)->this_hdr.contents != NULL)
3100 contents = elf_section_data (sec)->this_hdr.contents;
3103 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
3107 irelend = internal_relocs + sec->reloc_count;
3108 for (irel = internal_relocs; irel < irelend; irel++)
3110 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
3111 unsigned int r_symndx;
3112 struct elf_link_hash_entry *h;
3113 bfd_boolean converted;
3115 /* Don't convert R_386_GOT32 since we can't tell if it is applied
3116 to "mov $foo@GOT, %reg" which isn't a load via GOT. */
3117 if (r_type != R_386_GOT32X)
3120 r_symndx = ELF32_R_SYM (irel->r_info);
3121 if (r_symndx < symtab_hdr->sh_info)
3122 h = elf_i386_get_local_sym_hash (htab, sec->owner,
3123 (const Elf_Internal_Rela *) irel,
3127 h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info];
3128 while (h->root.type == bfd_link_hash_indirect
3129 || h->root.type == bfd_link_hash_warning)
3130 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3133 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3134 if (h != NULL && h->type == STT_GNU_IFUNC)
3138 if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents,
3139 irel, h, &converted, link_info))
3144 changed = converted;
3147 if (h->got.refcount > 0)
3148 h->got.refcount -= 1;
3152 if (local_got_refcounts != NULL
3153 && local_got_refcounts[r_symndx] > 0)
3154 local_got_refcounts[r_symndx] -= 1;
3159 if (contents != NULL
3160 && elf_section_data (sec)->this_hdr.contents != contents)
3162 if (!changed && !link_info->keep_memory)
3166 /* Cache the section contents for elf_link_input_bfd. */
3167 elf_section_data (sec)->this_hdr.contents = contents;
3171 if (elf_section_data (sec)->relocs != internal_relocs)
3174 free (internal_relocs);
3176 elf_section_data (sec)->relocs = internal_relocs;
3182 if (contents != NULL
3183 && elf_section_data (sec)->this_hdr.contents != contents)
3185 if (internal_relocs != NULL
3186 && elf_section_data (sec)->relocs != internal_relocs)
3187 free (internal_relocs);
3191 /* Set the sizes of the dynamic sections. */
3194 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3196 struct elf_i386_link_hash_table *htab;
3202 htab = elf_i386_hash_table (info);
3205 dynobj = htab->elf.dynobj;
3209 /* Set up .got offsets for local syms, and space for local dynamic
3211 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3213 bfd_signed_vma *local_got;
3214 bfd_signed_vma *end_local_got;
3215 char *local_tls_type;
3216 bfd_vma *local_tlsdesc_gotent;
3217 bfd_size_type locsymcount;
3218 Elf_Internal_Shdr *symtab_hdr;
3221 if (! is_i386_elf (ibfd))
3224 for (s = ibfd->sections; s != NULL; s = s->next)
3226 struct elf_dyn_relocs *p;
3228 if (!elf_i386_convert_load (ibfd, s, info))
3231 for (p = ((struct elf_dyn_relocs *)
3232 elf_section_data (s)->local_dynrel);
3236 if (!bfd_is_abs_section (p->sec)
3237 && bfd_is_abs_section (p->sec->output_section))
3239 /* Input section has been discarded, either because
3240 it is a copy of a linkonce section or due to
3241 linker script /DISCARD/, so we'll be discarding
3244 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3245 && strcmp (p->sec->output_section->name,
3248 /* Relocations in vxworks .tls_vars sections are
3249 handled specially by the loader. */
3251 else if (p->count != 0)
3253 srel = elf_section_data (p->sec)->sreloc;
3254 srel->size += p->count * sizeof (Elf32_External_Rel);
3255 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3256 && (info->flags & DF_TEXTREL) == 0)
3258 info->flags |= DF_TEXTREL;
3259 if ((info->warn_shared_textrel && bfd_link_pic (info))
3260 || info->error_textrel)
3261 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3262 p->sec->owner, p->sec);
3268 local_got = elf_local_got_refcounts (ibfd);
3272 symtab_hdr = &elf_symtab_hdr (ibfd);
3273 locsymcount = symtab_hdr->sh_info;
3274 end_local_got = local_got + locsymcount;
3275 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3276 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3278 srel = htab->elf.srelgot;
3279 for (; local_got < end_local_got;
3280 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3282 *local_tlsdesc_gotent = (bfd_vma) -1;
3285 if (GOT_TLS_GDESC_P (*local_tls_type))
3287 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3288 - elf_i386_compute_jump_table_size (htab);
3289 htab->elf.sgotplt->size += 8;
3290 *local_got = (bfd_vma) -2;
3292 if (! GOT_TLS_GDESC_P (*local_tls_type)
3293 || GOT_TLS_GD_P (*local_tls_type))
3295 *local_got = s->size;
3297 if (GOT_TLS_GD_P (*local_tls_type)
3298 || *local_tls_type == GOT_TLS_IE_BOTH)
3301 if (bfd_link_pic (info)
3302 || GOT_TLS_GD_ANY_P (*local_tls_type)
3303 || (*local_tls_type & GOT_TLS_IE))
3305 if (*local_tls_type == GOT_TLS_IE_BOTH)
3306 srel->size += 2 * sizeof (Elf32_External_Rel);
3307 else if (GOT_TLS_GD_P (*local_tls_type)
3308 || ! GOT_TLS_GDESC_P (*local_tls_type))
3309 srel->size += sizeof (Elf32_External_Rel);
3310 if (GOT_TLS_GDESC_P (*local_tls_type))
3311 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3315 *local_got = (bfd_vma) -1;
3319 if (htab->tls_ldm_got.refcount > 0)
3321 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3323 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3324 htab->elf.sgot->size += 8;
3325 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3328 htab->tls_ldm_got.offset = -1;
3330 /* Allocate global sym .plt and .got entries, and space for global
3331 sym dynamic relocs. */
3332 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3334 /* Allocate .plt and .got entries, and space for local symbols. */
3335 htab_traverse (htab->loc_hash_table,
3336 elf_i386_allocate_local_dynrelocs,
3339 /* For every jump slot reserved in the sgotplt, reloc_count is
3340 incremented. However, when we reserve space for TLS descriptors,
3341 it's not incremented, so in order to compute the space reserved
3342 for them, it suffices to multiply the reloc count by the jump
3345 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3346 so that R_386_IRELATIVE entries come last. */
3347 if (htab->elf.srelplt)
3349 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3350 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3351 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3353 else if (htab->elf.irelplt)
3354 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3357 if (htab->elf.sgotplt)
3359 /* Don't allocate .got.plt section if there are no GOT nor PLT
3360 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3361 if ((htab->elf.hgot == NULL
3362 || !htab->elf.hgot->ref_regular_nonweak)
3363 && (htab->elf.sgotplt->size
3364 == get_elf_backend_data (output_bfd)->got_header_size)
3365 && (htab->elf.splt == NULL
3366 || htab->elf.splt->size == 0)
3367 && (htab->elf.sgot == NULL
3368 || htab->elf.sgot->size == 0)
3369 && (htab->elf.iplt == NULL
3370 || htab->elf.iplt->size == 0)
3371 && (htab->elf.igotplt == NULL
3372 || htab->elf.igotplt->size == 0))
3373 htab->elf.sgotplt->size = 0;
3377 if (htab->plt_eh_frame != NULL
3378 && htab->elf.splt != NULL
3379 && htab->elf.splt->size != 0
3380 && !bfd_is_abs_section (htab->elf.splt->output_section)
3381 && _bfd_elf_eh_frame_present (info))
3382 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3384 /* We now have determined the sizes of the various dynamic sections.
3385 Allocate memory for them. */
3387 for (s = dynobj->sections; s != NULL; s = s->next)
3389 bfd_boolean strip_section = TRUE;
3391 if ((s->flags & SEC_LINKER_CREATED) == 0)
3394 if (s == htab->elf.splt
3395 || s == htab->elf.sgot)
3397 /* Strip this section if we don't need it; see the
3399 /* We'd like to strip these sections if they aren't needed, but if
3400 we've exported dynamic symbols from them we must leave them.
3401 It's too late to tell BFD to get rid of the symbols. */
3403 if (htab->elf.hplt != NULL)
3404 strip_section = FALSE;
3406 else if (s == htab->elf.sgotplt
3407 || s == htab->elf.iplt
3408 || s == htab->elf.igotplt
3409 || s == htab->plt_got
3410 || s == htab->plt_eh_frame
3411 || s == htab->sdynbss)
3413 /* Strip these too. */
3415 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3418 && s != htab->elf.srelplt
3419 && s != htab->srelplt2)
3422 /* We use the reloc_count field as a counter if we need
3423 to copy relocs into the output file. */
3428 /* It's not one of our sections, so don't allocate space. */
3434 /* If we don't need this section, strip it from the
3435 output file. This is mostly to handle .rel.bss and
3436 .rel.plt. We must create both sections in
3437 create_dynamic_sections, because they must be created
3438 before the linker maps input sections to output
3439 sections. The linker does that before
3440 adjust_dynamic_symbol is called, and it is that
3441 function which decides whether anything needs to go
3442 into these sections. */
3444 s->flags |= SEC_EXCLUDE;
3448 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3451 /* Allocate memory for the section contents. We use bfd_zalloc
3452 here in case unused entries are not reclaimed before the
3453 section's contents are written out. This should not happen,
3454 but this way if it does, we get a R_386_NONE reloc instead
3456 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3457 if (s->contents == NULL)
3461 if (htab->plt_eh_frame != NULL
3462 && htab->plt_eh_frame->contents != NULL)
3464 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3465 sizeof (elf_i386_eh_frame_plt));
3466 bfd_put_32 (dynobj, htab->elf.splt->size,
3467 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3470 if (htab->elf.dynamic_sections_created)
3472 /* Add some entries to the .dynamic section. We fill in the
3473 values later, in elf_i386_finish_dynamic_sections, but we
3474 must add the entries now so that we get the correct size for
3475 the .dynamic section. The DT_DEBUG entry is filled in by the
3476 dynamic linker and used by the debugger. */
3477 #define add_dynamic_entry(TAG, VAL) \
3478 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3480 if (bfd_link_executable (info))
3482 if (!add_dynamic_entry (DT_DEBUG, 0))
3486 if (htab->elf.splt->size != 0)
3488 /* DT_PLTGOT is used by prelink even if there is no PLT
3490 if (!add_dynamic_entry (DT_PLTGOT, 0))
3493 if (htab->elf.srelplt->size != 0)
3495 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3496 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3497 || !add_dynamic_entry (DT_JMPREL, 0))
3504 if (!add_dynamic_entry (DT_REL, 0)
3505 || !add_dynamic_entry (DT_RELSZ, 0)
3506 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3509 /* If any dynamic relocs apply to a read-only section,
3510 then we need a DT_TEXTREL entry. */
3511 if ((info->flags & DF_TEXTREL) == 0)
3512 elf_link_hash_traverse (&htab->elf,
3513 elf_i386_readonly_dynrelocs, info);
3515 if ((info->flags & DF_TEXTREL) != 0)
3517 if (htab->readonly_dynrelocs_against_ifunc)
3519 info->callbacks->einfo
3520 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3521 bfd_set_error (bfd_error_bad_value);
3525 if (!add_dynamic_entry (DT_TEXTREL, 0))
3529 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3530 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3533 #undef add_dynamic_entry
3539 elf_i386_always_size_sections (bfd *output_bfd,
3540 struct bfd_link_info *info)
3542 asection *tls_sec = elf_hash_table (info)->tls_sec;
3546 struct elf_link_hash_entry *tlsbase;
3548 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3549 "_TLS_MODULE_BASE_",
3550 FALSE, FALSE, FALSE);
3552 if (tlsbase && tlsbase->type == STT_TLS)
3554 struct elf_i386_link_hash_table *htab;
3555 struct bfd_link_hash_entry *bh = NULL;
3556 const struct elf_backend_data *bed
3557 = get_elf_backend_data (output_bfd);
3559 htab = elf_i386_hash_table (info);
3563 if (!(_bfd_generic_link_add_one_symbol
3564 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3565 tls_sec, 0, NULL, FALSE,
3566 bed->collect, &bh)))
3569 htab->tls_module_base = bh;
3571 tlsbase = (struct elf_link_hash_entry *)bh;
3572 tlsbase->def_regular = 1;
3573 tlsbase->other = STV_HIDDEN;
3574 tlsbase->root.linker_def = 1;
3575 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3582 /* Set the correct type for an x86 ELF section. We do this by the
3583 section name, which is a hack, but ought to work. */
3586 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3587 Elf_Internal_Shdr *hdr,
3592 name = bfd_get_section_name (abfd, sec);
3594 /* This is an ugly, but unfortunately necessary hack that is
3595 needed when producing EFI binaries on x86. It tells
3596 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3597 containing ELF relocation info. We need this hack in order to
3598 be able to generate ELF binaries that can be translated into
3599 EFI applications (which are essentially COFF objects). Those
3600 files contain a COFF ".reloc" section inside an ELFNN object,
3601 which would normally cause BFD to segfault because it would
3602 attempt to interpret this section as containing relocation
3603 entries for section "oc". With this hack enabled, ".reloc"
3604 will be treated as a normal data section, which will avoid the
3605 segfault. However, you won't be able to create an ELFNN binary
3606 with a section named "oc" that needs relocations, but that's
3607 the kind of ugly side-effects you get when detecting section
3608 types based on their names... In practice, this limitation is
3609 unlikely to bite. */
3610 if (strcmp (name, ".reloc") == 0)
3611 hdr->sh_type = SHT_PROGBITS;
3616 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3617 executables. Rather than setting it to the beginning of the TLS
3618 section, we have to set it to the end. This function may be called
3619 multiple times, it is idempotent. */
3622 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3624 struct elf_i386_link_hash_table *htab;
3625 struct bfd_link_hash_entry *base;
3627 if (!bfd_link_executable (info))
3630 htab = elf_i386_hash_table (info);
3634 base = htab->tls_module_base;
3638 base->u.def.value = htab->elf.tls_size;
3641 /* Return the base VMA address which should be subtracted from real addresses
3642 when resolving @dtpoff relocation.
3643 This is PT_TLS segment p_vaddr. */
3646 elf_i386_dtpoff_base (struct bfd_link_info *info)
3648 /* If tls_sec is NULL, we should have signalled an error already. */
3649 if (elf_hash_table (info)->tls_sec == NULL)
3651 return elf_hash_table (info)->tls_sec->vma;
3654 /* Return the relocation value for @tpoff relocation
3655 if STT_TLS virtual address is ADDRESS. */
3658 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3660 struct elf_link_hash_table *htab = elf_hash_table (info);
3661 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3662 bfd_vma static_tls_size;
3664 /* If tls_sec is NULL, we should have signalled an error already. */
3665 if (htab->tls_sec == NULL)
3668 /* Consider special static TLS alignment requirements. */
3669 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3670 return static_tls_size + htab->tls_sec->vma - address;
3673 /* Relocate an i386 ELF section. */
3676 elf_i386_relocate_section (bfd *output_bfd,
3677 struct bfd_link_info *info,
3679 asection *input_section,
3681 Elf_Internal_Rela *relocs,
3682 Elf_Internal_Sym *local_syms,
3683 asection **local_sections)
3685 struct elf_i386_link_hash_table *htab;
3686 Elf_Internal_Shdr *symtab_hdr;
3687 struct elf_link_hash_entry **sym_hashes;
3688 bfd_vma *local_got_offsets;
3689 bfd_vma *local_tlsdesc_gotents;
3690 Elf_Internal_Rela *rel;
3691 Elf_Internal_Rela *wrel;
3692 Elf_Internal_Rela *relend;
3693 bfd_boolean is_vxworks_tls;
3694 unsigned plt_entry_size;
3696 BFD_ASSERT (is_i386_elf (input_bfd));
3698 /* Skip if check_relocs failed. */
3699 if (input_section->check_relocs_failed)
3702 htab = elf_i386_hash_table (info);
3705 symtab_hdr = &elf_symtab_hdr (input_bfd);
3706 sym_hashes = elf_sym_hashes (input_bfd);
3707 local_got_offsets = elf_local_got_offsets (input_bfd);
3708 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3709 /* We have to handle relocations in vxworks .tls_vars sections
3710 specially, because the dynamic loader is 'weird'. */
3711 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3712 && bfd_link_pic (info)
3713 && !strcmp (input_section->output_section->name,
3716 elf_i386_set_tls_module_base (info);
3718 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3720 rel = wrel = relocs;
3721 relend = relocs + input_section->reloc_count;
3722 for (; rel < relend; wrel++, rel++)
3724 unsigned int r_type;
3725 reloc_howto_type *howto;
3726 unsigned long r_symndx;
3727 struct elf_link_hash_entry *h;
3728 struct elf_i386_link_hash_entry *eh;
3729 Elf_Internal_Sym *sym;
3731 bfd_vma off, offplt, plt_offset;
3733 bfd_boolean unresolved_reloc;
3734 bfd_reloc_status_type r;
3738 asection *resolved_plt;
3739 bfd_boolean resolved_to_zero;
3741 r_type = ELF32_R_TYPE (rel->r_info);
3742 if (r_type == R_386_GNU_VTINHERIT
3743 || r_type == R_386_GNU_VTENTRY)
3750 if ((indx = r_type) >= R_386_standard
3751 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3752 >= R_386_ext - R_386_standard)
3753 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3754 >= R_386_ext2 - R_386_ext))
3756 (*_bfd_error_handler)
3757 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3758 input_bfd, input_section, r_type);
3759 bfd_set_error (bfd_error_bad_value);
3762 howto = elf_howto_table + indx;
3764 r_symndx = ELF32_R_SYM (rel->r_info);
3768 unresolved_reloc = FALSE;
3769 if (r_symndx < symtab_hdr->sh_info)
3771 sym = local_syms + r_symndx;
3772 sec = local_sections[r_symndx];
3773 relocation = (sec->output_section->vma
3774 + sec->output_offset
3776 st_size = sym->st_size;
3778 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3779 && ((sec->flags & SEC_MERGE) != 0
3780 || (bfd_link_relocatable (info)
3781 && sec->output_offset != 0)))
3784 bfd_byte *where = contents + rel->r_offset;
3786 switch (howto->size)
3789 addend = bfd_get_8 (input_bfd, where);
3790 if (howto->pc_relative)
3792 addend = (addend ^ 0x80) - 0x80;
3797 addend = bfd_get_16 (input_bfd, where);
3798 if (howto->pc_relative)
3800 addend = (addend ^ 0x8000) - 0x8000;
3805 addend = bfd_get_32 (input_bfd, where);
3806 if (howto->pc_relative)
3808 addend = (addend ^ 0x80000000) - 0x80000000;
3816 if (bfd_link_relocatable (info))
3817 addend += sec->output_offset;
3820 asection *msec = sec;
3821 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3823 addend -= relocation;
3824 addend += msec->output_section->vma + msec->output_offset;
3827 switch (howto->size)
3830 /* FIXME: overflow checks. */
3831 if (howto->pc_relative)
3833 bfd_put_8 (input_bfd, addend, where);
3836 if (howto->pc_relative)
3838 bfd_put_16 (input_bfd, addend, where);
3841 if (howto->pc_relative)
3843 bfd_put_32 (input_bfd, addend, where);
3847 else if (!bfd_link_relocatable (info)
3848 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3850 /* Relocate against local STT_GNU_IFUNC symbol. */
3851 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3856 /* Set STT_GNU_IFUNC symbol value. */
3857 h->root.u.def.value = sym->st_value;
3858 h->root.u.def.section = sec;
3863 bfd_boolean warned ATTRIBUTE_UNUSED;
3864 bfd_boolean ignored ATTRIBUTE_UNUSED;
3866 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3867 r_symndx, symtab_hdr, sym_hashes,
3869 unresolved_reloc, warned, ignored);
3873 if (sec != NULL && discarded_section (sec))
3875 _bfd_clear_contents (howto, input_bfd, input_section,
3876 contents + rel->r_offset);
3877 wrel->r_offset = rel->r_offset;
3881 /* For ld -r, remove relocations in debug sections against
3882 sections defined in discarded sections. Not done for
3883 eh_frame editing code expects to be present. */
3884 if (bfd_link_relocatable (info)
3885 && (input_section->flags & SEC_DEBUGGING))
3891 if (bfd_link_relocatable (info))
3898 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3899 it here if it is defined in a non-shared object. */
3901 && h->type == STT_GNU_IFUNC
3904 asection *plt, *gotplt, *base_got;
3908 if ((input_section->flags & SEC_ALLOC) == 0)
3910 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3911 sections because such sections are not SEC_ALLOC and
3912 thus ld.so will not process them. */
3913 if ((input_section->flags & SEC_DEBUGGING) != 0)
3918 /* STT_GNU_IFUNC symbol must go through PLT. */
3919 if (htab->elf.splt != NULL)
3921 plt = htab->elf.splt;
3922 gotplt = htab->elf.sgotplt;
3926 plt = htab->elf.iplt;
3927 gotplt = htab->elf.igotplt;
3937 base_got = htab->elf.sgot;
3938 off = h->got.offset;
3940 if (base_got == NULL)
3943 if (off == (bfd_vma) -1)
3945 /* We can't use h->got.offset here to save state, or
3946 even just remember the offset, as finish_dynamic_symbol
3947 would use that as offset into .got. */
3949 if (h->plt.offset == (bfd_vma) -1)
3952 if (htab->elf.splt != NULL)
3954 plt_index = h->plt.offset / plt_entry_size - 1;
3955 off = (plt_index + 3) * 4;
3956 base_got = htab->elf.sgotplt;
3960 plt_index = h->plt.offset / plt_entry_size;
3961 off = plt_index * 4;
3962 base_got = htab->elf.igotplt;
3965 if (h->dynindx == -1
3969 /* This references the local defitionion. We must
3970 initialize this entry in the global offset table.
3971 Since the offset must always be a multiple of 8,
3972 we use the least significant bit to record
3973 whether we have initialized it already.
3975 When doing a dynamic link, we create a .rela.got
3976 relocation entry to initialize the value. This
3977 is done in the finish_dynamic_symbol routine. */
3982 bfd_put_32 (output_bfd, relocation,
3983 base_got->contents + off);
3991 relocation = (base_got->output_section->vma
3992 + base_got->output_offset + off
3993 - gotplt->output_section->vma
3994 - gotplt->output_offset);
3996 if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5)
3998 if (bfd_link_pic (info))
3999 goto disallow_got32;
4001 /* Add the GOT base if there is no base register. */
4002 relocation += (gotplt->output_section->vma
4003 + gotplt->output_offset);
4005 else if (htab->elf.splt == NULL)
4007 /* Adjust for static executables. */
4008 relocation += gotplt->output_offset;
4014 if (h->plt.offset == (bfd_vma) -1)
4016 /* Handle static pointers of STT_GNU_IFUNC symbols. */
4017 if (r_type == R_386_32
4018 && (input_section->flags & SEC_CODE) == 0)
4019 goto do_ifunc_pointer;
4020 goto bad_ifunc_reloc;
4023 relocation = (plt->output_section->vma
4024 + plt->output_offset + h->plt.offset);
4030 if (h->root.root.string)
4031 name = h->root.root.string;
4033 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4035 (*_bfd_error_handler)
4036 (_("%B: relocation %s against STT_GNU_IFUNC "
4037 "symbol `%s' isn't supported"), input_bfd,
4039 bfd_set_error (bfd_error_bad_value);
4043 /* Generate dynamic relcoation only when there is a
4044 non-GOT reference in a shared object. */
4045 if ((bfd_link_pic (info) && h->non_got_ref)
4046 || h->plt.offset == (bfd_vma) -1)
4048 Elf_Internal_Rela outrel;
4053 /* Need a dynamic relocation to get the real function
4055 offset = _bfd_elf_section_offset (output_bfd,
4059 if (offset == (bfd_vma) -1
4060 || offset == (bfd_vma) -2)
4063 outrel.r_offset = (input_section->output_section->vma
4064 + input_section->output_offset
4067 if (h->dynindx == -1
4069 || bfd_link_executable (info))
4071 /* This symbol is resolved locally. */
4072 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4073 bfd_put_32 (output_bfd,
4074 (h->root.u.def.value
4075 + h->root.u.def.section->output_section->vma
4076 + h->root.u.def.section->output_offset),
4080 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4082 /* Dynamic relocations are stored in
4083 1. .rel.ifunc section in PIC object.
4084 2. .rel.got section in dynamic executable.
4085 3. .rel.iplt section in static executable. */
4086 if (bfd_link_pic (info))
4087 sreloc = htab->elf.irelifunc;
4088 else if (htab->elf.splt != NULL)
4089 sreloc = htab->elf.srelgot;
4091 sreloc = htab->elf.irelplt;
4092 elf_append_rel (output_bfd, sreloc, &outrel);
4094 /* If this reloc is against an external symbol, we
4095 do not want to fiddle with the addend. Otherwise,
4096 we need to include the symbol value so that it
4097 becomes an addend for the dynamic reloc. For an
4098 internal symbol, we have updated addend. */
4107 relocation -= (gotplt->output_section->vma
4108 + gotplt->output_offset);
4113 eh = (struct elf_i386_link_hash_entry *) h;
4114 resolved_to_zero = (eh != NULL
4115 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
4122 /* Avoid optimizing _DYNAMIC since ld.so may use its
4123 link-time address. */
4124 if (h == htab->elf.hdynamic)
4127 if (bfd_link_pic (info))
4129 /* It is OK to convert mov to lea and convert indirect
4130 branch to direct branch. It is OK to convert adc,
4131 add, and, cmp, or, sbb, sub, test, xor only when PIC
4133 unsigned int opcode, addend;
4134 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4137 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4138 if (opcode != 0x8b && opcode != 0xff)
4142 /* Resolve "mov GOT[(%reg)], %reg",
4143 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4144 and "binop foo@GOT[(%reg)], %reg". */
4146 || (h->plt.offset == (bfd_vma) -1
4147 && h->got.offset == (bfd_vma) -1)
4148 || htab->elf.sgotplt == NULL)
4151 offplt = (htab->elf.sgotplt->output_section->vma
4152 + htab->elf.sgotplt->output_offset);
4154 /* It is relative to .got.plt section. */
4155 if (h->got.offset != (bfd_vma) -1)
4156 /* Use GOT entry. Mask off the least significant bit in
4157 GOT offset which may be set by R_386_GOT32 processing
4159 relocation = (htab->elf.sgot->output_section->vma
4160 + htab->elf.sgot->output_offset
4161 + (h->got.offset & ~1) - offplt);
4163 /* Use GOTPLT entry. */
4164 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4166 if (!bfd_link_pic (info))
4168 /* If not PIC, add the .got.plt section address for
4169 baseless addressing. */
4171 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4172 if ((modrm & 0xc7) == 0x5)
4173 relocation += offplt;
4176 unresolved_reloc = FALSE;
4181 /* Relocation is to the entry for this symbol in the global
4183 if (htab->elf.sgot == NULL)
4190 off = h->got.offset;
4191 dyn = htab->elf.dynamic_sections_created;
4192 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4193 bfd_link_pic (info),
4195 || (bfd_link_pic (info)
4196 && SYMBOL_REFERENCES_LOCAL (info, h))
4197 || (ELF_ST_VISIBILITY (h->other)
4198 && h->root.type == bfd_link_hash_undefweak))
4200 /* This is actually a static link, or it is a
4201 -Bsymbolic link and the symbol is defined
4202 locally, or the symbol was forced to be local
4203 because of a version file. We must initialize
4204 this entry in the global offset table. Since the
4205 offset must always be a multiple of 4, we use the
4206 least significant bit to record whether we have
4207 initialized it already.
4209 When doing a dynamic link, we create a .rel.got
4210 relocation entry to initialize the value. This
4211 is done in the finish_dynamic_symbol routine. */
4216 bfd_put_32 (output_bfd, relocation,
4217 htab->elf.sgot->contents + off);
4222 unresolved_reloc = FALSE;
4226 if (local_got_offsets == NULL)
4229 off = local_got_offsets[r_symndx];
4231 /* The offset must always be a multiple of 4. We use
4232 the least significant bit to record whether we have
4233 already generated the necessary reloc. */
4238 bfd_put_32 (output_bfd, relocation,
4239 htab->elf.sgot->contents + off);
4241 if (bfd_link_pic (info))
4244 Elf_Internal_Rela outrel;
4246 s = htab->elf.srelgot;
4250 outrel.r_offset = (htab->elf.sgot->output_section->vma
4251 + htab->elf.sgot->output_offset
4253 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4254 elf_append_rel (output_bfd, s, &outrel);
4257 local_got_offsets[r_symndx] |= 1;
4261 if (off >= (bfd_vma) -2)
4264 relocation = (htab->elf.sgot->output_section->vma
4265 + htab->elf.sgot->output_offset + off);
4266 if ((*(contents + rel->r_offset - 1) & 0xc7) == 0x5)
4268 if (bfd_link_pic (info))
4270 /* For PIC, disallow R_386_GOT32 without a base
4271 register since we don't know what the GOT base
4277 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
4280 name = h->root.root.string;
4282 (*_bfd_error_handler)
4283 (_("%B: direct GOT relocation %s against `%s' without base register can not be used when making a shared object"),
4284 input_bfd, howto->name, name);
4285 bfd_set_error (bfd_error_bad_value);
4291 /* Subtract the .got.plt section address only with a base
4293 relocation -= (htab->elf.sgotplt->output_section->vma
4294 + htab->elf.sgotplt->output_offset);
4300 /* Relocation is relative to the start of the global offset
4303 /* Check to make sure it isn't a protected function or data
4304 symbol for shared library since it may not be local when
4305 used as function address or with copy relocation. We also
4306 need to make sure that a symbol is referenced locally. */
4307 if (!bfd_link_executable (info) && h)
4309 if (!h->def_regular)
4313 switch (ELF_ST_VISIBILITY (h->other))
4316 v = _("hidden symbol");
4319 v = _("internal symbol");
4322 v = _("protected symbol");
4329 (*_bfd_error_handler)
4330 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4331 input_bfd, v, h->root.root.string);
4332 bfd_set_error (bfd_error_bad_value);
4335 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4336 && (h->type == STT_FUNC
4337 || h->type == STT_OBJECT)
4338 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4340 (*_bfd_error_handler)
4341 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4343 h->type == STT_FUNC ? "function" : "data",
4344 h->root.root.string);
4345 bfd_set_error (bfd_error_bad_value);
4350 /* Note that sgot is not involved in this
4351 calculation. We always want the start of .got.plt. If we
4352 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4353 permitted by the ABI, we might have to change this
4355 relocation -= htab->elf.sgotplt->output_section->vma
4356 + htab->elf.sgotplt->output_offset;
4360 /* Use global offset table as symbol value. */
4361 relocation = htab->elf.sgotplt->output_section->vma
4362 + htab->elf.sgotplt->output_offset;
4363 unresolved_reloc = FALSE;
4367 /* Relocation is to the entry for this symbol in the
4368 procedure linkage table. */
4370 /* Resolve a PLT32 reloc against a local symbol directly,
4371 without using the procedure linkage table. */
4375 if ((h->plt.offset == (bfd_vma) -1
4376 && eh->plt_got.offset == (bfd_vma) -1)
4377 || htab->elf.splt == NULL)
4379 /* We didn't make a PLT entry for this symbol. This
4380 happens when statically linking PIC code, or when
4381 using -Bsymbolic. */
4385 if (h->plt.offset != (bfd_vma) -1)
4387 resolved_plt = htab->elf.splt;
4388 plt_offset = h->plt.offset;
4392 resolved_plt = htab->plt_got;
4393 plt_offset = eh->plt_got.offset;
4396 relocation = (resolved_plt->output_section->vma
4397 + resolved_plt->output_offset
4399 unresolved_reloc = FALSE;
4403 /* Set to symbol size. */
4404 relocation = st_size;
4409 if ((input_section->flags & SEC_ALLOC) == 0
4413 /* Copy dynamic function pointer relocations. Don't generate
4414 dynamic relocations against resolved undefined weak symbols
4415 in PIE, except for R_386_PC32. */
4416 if ((bfd_link_pic (info)
4418 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4419 && (!resolved_to_zero
4420 || r_type == R_386_PC32))
4421 || h->root.type != bfd_link_hash_undefweak))
4422 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4423 || !SYMBOL_CALLS_LOCAL (info, h)))
4424 || (ELIMINATE_COPY_RELOCS
4425 && !bfd_link_pic (info)
4429 || eh->func_pointer_refcount > 0
4430 || (h->root.type == bfd_link_hash_undefweak
4431 && !resolved_to_zero))
4432 && ((h->def_dynamic && !h->def_regular)
4433 /* Undefined weak symbol is bound locally when
4435 || h->root.type == bfd_link_hash_undefweak)))
4437 Elf_Internal_Rela outrel;
4438 bfd_boolean skip, relocate;
4441 /* When generating a shared object, these relocations
4442 are copied into the output file to be resolved at run
4449 _bfd_elf_section_offset (output_bfd, info, input_section,
4451 if (outrel.r_offset == (bfd_vma) -1)
4453 else if (outrel.r_offset == (bfd_vma) -2)
4454 skip = TRUE, relocate = TRUE;
4455 outrel.r_offset += (input_section->output_section->vma
4456 + input_section->output_offset);
4459 memset (&outrel, 0, sizeof outrel);
4462 && (r_type == R_386_PC32
4463 || !(bfd_link_executable (info)
4464 || SYMBOLIC_BIND (info, h))
4465 || !h->def_regular))
4466 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4469 /* This symbol is local, or marked to become local. */
4471 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4474 sreloc = elf_section_data (input_section)->sreloc;
4476 if (sreloc == NULL || sreloc->contents == NULL)
4478 r = bfd_reloc_notsupported;
4479 goto check_relocation_error;
4482 elf_append_rel (output_bfd, sreloc, &outrel);
4484 /* If this reloc is against an external symbol, we do
4485 not want to fiddle with the addend. Otherwise, we
4486 need to include the symbol value so that it becomes
4487 an addend for the dynamic reloc. */
4494 if (!bfd_link_executable (info))
4496 Elf_Internal_Rela outrel;
4499 outrel.r_offset = rel->r_offset
4500 + input_section->output_section->vma
4501 + input_section->output_offset;
4502 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4503 sreloc = elf_section_data (input_section)->sreloc;
4506 elf_append_rel (output_bfd, sreloc, &outrel);
4511 case R_386_TLS_GOTDESC:
4512 case R_386_TLS_DESC_CALL:
4513 case R_386_TLS_IE_32:
4514 case R_386_TLS_GOTIE:
4515 tls_type = GOT_UNKNOWN;
4516 if (h == NULL && local_got_offsets)
4517 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4519 tls_type = elf_i386_hash_entry(h)->tls_type;
4520 if (tls_type == GOT_TLS_IE)
4521 tls_type = GOT_TLS_IE_NEG;
4523 if (! elf_i386_tls_transition (info, input_bfd,
4524 input_section, contents,
4525 symtab_hdr, sym_hashes,
4526 &r_type, tls_type, rel,
4527 relend, h, r_symndx, TRUE))
4530 if (r_type == R_386_TLS_LE_32)
4532 BFD_ASSERT (! unresolved_reloc);
4533 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4538 /* GD->LE transition. */
4539 type = *(contents + rel->r_offset - 2);
4543 leal foo@tlsgd(,%ebx,1), %eax
4544 call ___tls_get_addr@PLT
4547 subl $foo@tpoff, %eax
4548 (6 byte form of subl). */
4549 roff = rel->r_offset + 5;
4554 leal foo@tlsgd(%ebx), %eax
4555 call ___tls_get_addr@PLT
4558 leal foo@tlsgd(%reg), %eax
4559 call *___tls_get_addr@GOT(%reg)
4560 which may be converted to
4561 addr32 call ___tls_get_addr
4563 movl %gs:0, %eax; subl $foo@tpoff, %eax
4564 (6 byte form of subl). */
4565 roff = rel->r_offset + 6;
4567 memcpy (contents + roff - 8,
4568 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4569 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4571 /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */
4576 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4578 /* GDesc -> LE transition.
4579 It's originally something like:
4580 leal x@tlsdesc(%ebx), %eax
4584 Registers other than %eax may be set up here. */
4589 roff = rel->r_offset;
4590 val = bfd_get_8 (input_bfd, contents + roff - 1);
4592 /* Now modify the instruction as appropriate. */
4593 /* aoliva FIXME: remove the above and xor the byte
4595 bfd_put_8 (output_bfd, val ^ 0x86,
4596 contents + roff - 1);
4597 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4601 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4603 /* GDesc -> LE transition.
4611 roff = rel->r_offset;
4612 bfd_put_8 (output_bfd, 0x66, contents + roff);
4613 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4616 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4620 /* IE->LE transition:
4621 Originally it can be one of:
4629 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4632 /* movl foo, %eax. */
4633 bfd_put_8 (output_bfd, 0xb8,
4634 contents + rel->r_offset - 1);
4640 type = bfd_get_8 (input_bfd,
4641 contents + rel->r_offset - 2);
4646 bfd_put_8 (output_bfd, 0xc7,
4647 contents + rel->r_offset - 2);
4648 bfd_put_8 (output_bfd,
4649 0xc0 | ((val >> 3) & 7),
4650 contents + rel->r_offset - 1);
4654 bfd_put_8 (output_bfd, 0x81,
4655 contents + rel->r_offset - 2);
4656 bfd_put_8 (output_bfd,
4657 0xc0 | ((val >> 3) & 7),
4658 contents + rel->r_offset - 1);
4665 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4666 contents + rel->r_offset);
4671 unsigned int val, type;
4673 /* {IE_32,GOTIE}->LE transition:
4674 Originally it can be one of:
4675 subl foo(%reg1), %reg2
4676 movl foo(%reg1), %reg2
4677 addl foo(%reg1), %reg2
4680 movl $foo, %reg2 (6 byte form)
4681 addl $foo, %reg2. */
4682 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4683 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4687 bfd_put_8 (output_bfd, 0xc7,
4688 contents + rel->r_offset - 2);
4689 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4690 contents + rel->r_offset - 1);
4692 else if (type == 0x2b)
4695 bfd_put_8 (output_bfd, 0x81,
4696 contents + rel->r_offset - 2);
4697 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4698 contents + rel->r_offset - 1);
4700 else if (type == 0x03)
4703 bfd_put_8 (output_bfd, 0x81,
4704 contents + rel->r_offset - 2);
4705 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4706 contents + rel->r_offset - 1);
4710 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4711 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4712 contents + rel->r_offset);
4714 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4715 contents + rel->r_offset);
4720 if (htab->elf.sgot == NULL)
4725 off = h->got.offset;
4726 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4730 if (local_got_offsets == NULL)
4733 off = local_got_offsets[r_symndx];
4734 offplt = local_tlsdesc_gotents[r_symndx];
4741 Elf_Internal_Rela outrel;
4745 if (htab->elf.srelgot == NULL)
4748 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4750 if (GOT_TLS_GDESC_P (tls_type))
4753 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4754 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4755 <= htab->elf.sgotplt->size);
4756 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4757 + htab->elf.sgotplt->output_offset
4759 + htab->sgotplt_jump_table_size);
4760 sreloc = htab->elf.srelplt;
4761 loc = sreloc->contents;
4762 loc += (htab->next_tls_desc_index++
4763 * sizeof (Elf32_External_Rel));
4764 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4765 <= sreloc->contents + sreloc->size);
4766 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4769 BFD_ASSERT (! unresolved_reloc);
4770 bfd_put_32 (output_bfd,
4771 relocation - elf_i386_dtpoff_base (info),
4772 htab->elf.sgotplt->contents + offplt
4773 + htab->sgotplt_jump_table_size + 4);
4777 bfd_put_32 (output_bfd, 0,
4778 htab->elf.sgotplt->contents + offplt
4779 + htab->sgotplt_jump_table_size + 4);
4783 sreloc = htab->elf.srelgot;
4785 outrel.r_offset = (htab->elf.sgot->output_section->vma
4786 + htab->elf.sgot->output_offset + off);
4788 if (GOT_TLS_GD_P (tls_type))
4789 dr_type = R_386_TLS_DTPMOD32;
4790 else if (GOT_TLS_GDESC_P (tls_type))
4792 else if (tls_type == GOT_TLS_IE_POS)
4793 dr_type = R_386_TLS_TPOFF;
4795 dr_type = R_386_TLS_TPOFF32;
4797 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4798 bfd_put_32 (output_bfd,
4799 relocation - elf_i386_dtpoff_base (info),
4800 htab->elf.sgot->contents + off);
4801 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4802 bfd_put_32 (output_bfd,
4803 elf_i386_dtpoff_base (info) - relocation,
4804 htab->elf.sgot->contents + off);
4805 else if (dr_type != R_386_TLS_DESC)
4806 bfd_put_32 (output_bfd, 0,
4807 htab->elf.sgot->contents + off);
4808 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4810 elf_append_rel (output_bfd, sreloc, &outrel);
4812 if (GOT_TLS_GD_P (tls_type))
4816 BFD_ASSERT (! unresolved_reloc);
4817 bfd_put_32 (output_bfd,
4818 relocation - elf_i386_dtpoff_base (info),
4819 htab->elf.sgot->contents + off + 4);
4823 bfd_put_32 (output_bfd, 0,
4824 htab->elf.sgot->contents + off + 4);
4825 outrel.r_info = ELF32_R_INFO (indx,
4826 R_386_TLS_DTPOFF32);
4827 outrel.r_offset += 4;
4828 elf_append_rel (output_bfd, sreloc, &outrel);
4831 else if (tls_type == GOT_TLS_IE_BOTH)
4833 bfd_put_32 (output_bfd,
4835 ? relocation - elf_i386_dtpoff_base (info)
4837 htab->elf.sgot->contents + off + 4);
4838 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4839 outrel.r_offset += 4;
4840 elf_append_rel (output_bfd, sreloc, &outrel);
4847 local_got_offsets[r_symndx] |= 1;
4850 if (off >= (bfd_vma) -2
4851 && ! GOT_TLS_GDESC_P (tls_type))
4853 if (r_type == R_386_TLS_GOTDESC
4854 || r_type == R_386_TLS_DESC_CALL)
4856 relocation = htab->sgotplt_jump_table_size + offplt;
4857 unresolved_reloc = FALSE;
4859 else if (r_type == ELF32_R_TYPE (rel->r_info))
4861 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4862 + htab->elf.sgotplt->output_offset;
4863 relocation = htab->elf.sgot->output_section->vma
4864 + htab->elf.sgot->output_offset + off - g_o_t;
4865 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4866 && tls_type == GOT_TLS_IE_BOTH)
4868 if (r_type == R_386_TLS_IE)
4869 relocation += g_o_t;
4870 unresolved_reloc = FALSE;
4872 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4874 unsigned int val, type;
4877 /* GD->IE transition. */
4878 type = *(contents + rel->r_offset - 2);
4879 val = *(contents + rel->r_offset - 1);
4883 leal foo@tlsgd(,%ebx,1), %eax
4884 call ___tls_get_addr@PLT
4887 subl $foo@gottpoff(%ebx), %eax. */
4889 roff = rel->r_offset - 3;
4894 leal foo@tlsgd(%ebx), %eax
4895 call ___tls_get_addr@PLT
4898 leal foo@tlsgd(%reg), %eax
4899 call *___tls_get_addr@GOT(%reg)
4900 which may be converted to
4901 addr32 call ___tls_get_addr
4904 subl $foo@gottpoff(%reg), %eax. */
4905 roff = rel->r_offset - 2;
4907 memcpy (contents + roff,
4908 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4909 contents[roff + 7] = 0x80 | (val & 7);
4910 /* If foo is used only with foo@gotntpoff(%reg) and
4911 foo@indntpoff, but not with foo@gottpoff(%reg), change
4912 subl $foo@gottpoff(%reg), %eax
4914 addl $foo@gotntpoff(%reg), %eax. */
4915 if (tls_type == GOT_TLS_IE_POS)
4916 contents[roff + 6] = 0x03;
4917 bfd_put_32 (output_bfd,
4918 htab->elf.sgot->output_section->vma
4919 + htab->elf.sgot->output_offset + off
4920 - htab->elf.sgotplt->output_section->vma
4921 - htab->elf.sgotplt->output_offset,
4922 contents + roff + 8);
4923 /* Skip R_386_PLT32 and R_386_GOT32X. */
4928 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4930 /* GDesc -> IE transition.
4931 It's originally something like:
4932 leal x@tlsdesc(%ebx), %eax
4935 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4937 movl x@gottpoff(%ebx), %eax # before negl %eax
4939 Registers other than %eax may be set up here. */
4943 /* First, make sure it's a leal adding ebx to a 32-bit
4944 offset into any register, although it's probably
4945 almost always going to be eax. */
4946 roff = rel->r_offset;
4948 /* Now modify the instruction as appropriate. */
4949 /* To turn a leal into a movl in the form we use it, it
4950 suffices to change the first byte from 0x8d to 0x8b.
4951 aoliva FIXME: should we decide to keep the leal, all
4952 we have to do is remove the statement below, and
4953 adjust the relaxation of R_386_TLS_DESC_CALL. */
4954 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4956 if (tls_type == GOT_TLS_IE_BOTH)
4959 bfd_put_32 (output_bfd,
4960 htab->elf.sgot->output_section->vma
4961 + htab->elf.sgot->output_offset + off
4962 - htab->elf.sgotplt->output_section->vma
4963 - htab->elf.sgotplt->output_offset,
4967 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4969 /* GDesc -> IE transition.
4977 depending on how we transformed the TLS_GOTDESC above.
4982 roff = rel->r_offset;
4984 /* Now modify the instruction as appropriate. */
4985 if (tls_type != GOT_TLS_IE_NEG)
4988 bfd_put_8 (output_bfd, 0x66, contents + roff);
4989 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4994 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4995 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
5005 if (! elf_i386_tls_transition (info, input_bfd,
5006 input_section, contents,
5007 symtab_hdr, sym_hashes,
5008 &r_type, GOT_UNKNOWN, rel,
5009 relend, h, r_symndx, TRUE))
5012 if (r_type != R_386_TLS_LDM)
5014 /* LD->LE transition. Change
5015 leal foo@tlsldm(%ebx) %eax
5016 call ___tls_get_addr@PLT
5020 leal 0(%esi,1), %esi
5022 leal foo@tlsldm(%reg) %eax
5023 call *___tls_get_addr@GOT(%reg)
5024 which may be converted to
5025 addr32 call ___tls_get_addr
5028 leal 0(%esi), %esi */
5029 BFD_ASSERT (r_type == R_386_TLS_LE_32);
5030 if (*(contents + rel->r_offset + 4) == 0xff
5031 || *(contents + rel->r_offset + 4) == 0x67)
5032 memcpy (contents + rel->r_offset - 2,
5033 "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12);
5035 memcpy (contents + rel->r_offset - 2,
5036 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
5037 /* Skip R_386_PC32/R_386_PLT32. */
5043 if (htab->elf.sgot == NULL)
5046 off = htab->tls_ldm_got.offset;
5051 Elf_Internal_Rela outrel;
5053 if (htab->elf.srelgot == NULL)
5056 outrel.r_offset = (htab->elf.sgot->output_section->vma
5057 + htab->elf.sgot->output_offset + off);
5059 bfd_put_32 (output_bfd, 0,
5060 htab->elf.sgot->contents + off);
5061 bfd_put_32 (output_bfd, 0,
5062 htab->elf.sgot->contents + off + 4);
5063 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
5064 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
5065 htab->tls_ldm_got.offset |= 1;
5067 relocation = htab->elf.sgot->output_section->vma
5068 + htab->elf.sgot->output_offset + off
5069 - htab->elf.sgotplt->output_section->vma
5070 - htab->elf.sgotplt->output_offset;
5071 unresolved_reloc = FALSE;
5074 case R_386_TLS_LDO_32:
5075 if (!bfd_link_executable (info)
5076 || (input_section->flags & SEC_CODE) == 0)
5077 relocation -= elf_i386_dtpoff_base (info);
5079 /* When converting LDO to LE, we must negate. */
5080 relocation = -elf_i386_tpoff (info, relocation);
5083 case R_386_TLS_LE_32:
5085 if (!bfd_link_executable (info))
5087 Elf_Internal_Rela outrel;
5090 outrel.r_offset = rel->r_offset
5091 + input_section->output_section->vma
5092 + input_section->output_offset;
5093 if (h != NULL && h->dynindx != -1)
5097 if (r_type == R_386_TLS_LE_32)
5098 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5100 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5101 sreloc = elf_section_data (input_section)->sreloc;
5104 elf_append_rel (output_bfd, sreloc, &outrel);
5107 else if (r_type == R_386_TLS_LE_32)
5108 relocation = elf_i386_dtpoff_base (info) - relocation;
5110 relocation -= elf_i386_dtpoff_base (info);
5112 else if (r_type == R_386_TLS_LE_32)
5113 relocation = elf_i386_tpoff (info, relocation);
5115 relocation = -elf_i386_tpoff (info, relocation);
5122 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5123 because such sections are not SEC_ALLOC and thus ld.so will
5124 not process them. */
5125 if (unresolved_reloc
5126 && !((input_section->flags & SEC_DEBUGGING) != 0
5128 && _bfd_elf_section_offset (output_bfd, info, input_section,
5129 rel->r_offset) != (bfd_vma) -1)
5131 (*_bfd_error_handler)
5132 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5135 (long) rel->r_offset,
5137 h->root.root.string);
5142 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5143 contents, rel->r_offset,
5146 check_relocation_error:
5147 if (r != bfd_reloc_ok)
5152 name = h->root.root.string;
5155 name = bfd_elf_string_from_elf_section (input_bfd,
5156 symtab_hdr->sh_link,
5161 name = bfd_section_name (input_bfd, sec);
5164 if (r == bfd_reloc_overflow)
5165 (*info->callbacks->reloc_overflow)
5166 (info, (h ? &h->root : NULL), name, howto->name,
5167 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
5170 (*_bfd_error_handler)
5171 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5172 input_bfd, input_section,
5173 (long) rel->r_offset, name, (int) r);
5184 Elf_Internal_Shdr *rel_hdr;
5185 size_t deleted = rel - wrel;
5187 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5188 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5189 if (rel_hdr->sh_size == 0)
5191 /* It is too late to remove an empty reloc section. Leave
5193 ??? What is wrong with an empty section??? */
5194 rel_hdr->sh_size = rel_hdr->sh_entsize;
5197 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5198 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5199 input_section->reloc_count -= deleted;
5205 /* Finish up dynamic symbol handling. We set the contents of various
5206 dynamic sections here. */
5209 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5210 struct bfd_link_info *info,
5211 struct elf_link_hash_entry *h,
5212 Elf_Internal_Sym *sym)
5214 struct elf_i386_link_hash_table *htab;
5215 unsigned plt_entry_size;
5216 const struct elf_i386_backend_data *abed;
5217 struct elf_i386_link_hash_entry *eh;
5218 bfd_boolean local_undefweak;
5220 htab = elf_i386_hash_table (info);
5224 abed = get_elf_i386_backend_data (output_bfd);
5225 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5227 eh = (struct elf_i386_link_hash_entry *) h;
5229 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5230 resolved undefined weak symbols in executable so that their
5231 references have value 0 at run-time. */
5232 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
5236 if (h->plt.offset != (bfd_vma) -1)
5240 Elf_Internal_Rela rel;
5242 asection *plt, *gotplt, *relplt;
5244 /* When building a static executable, use .iplt, .igot.plt and
5245 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5246 if (htab->elf.splt != NULL)
5248 plt = htab->elf.splt;
5249 gotplt = htab->elf.sgotplt;
5250 relplt = htab->elf.srelplt;
5254 plt = htab->elf.iplt;
5255 gotplt = htab->elf.igotplt;
5256 relplt = htab->elf.irelplt;
5259 /* This symbol has an entry in the procedure linkage table. Set
5262 if ((h->dynindx == -1
5264 && !((h->forced_local || bfd_link_executable (info))
5266 && h->type == STT_GNU_IFUNC))
5272 /* Get the index in the procedure linkage table which
5273 corresponds to this symbol. This is the index of this symbol
5274 in all the symbols for which we are making plt entries. The
5275 first entry in the procedure linkage table is reserved.
5277 Get the offset into the .got table of the entry that
5278 corresponds to this function. Each .got entry is 4 bytes.
5279 The first three are reserved.
5281 For static executables, we don't reserve anything. */
5283 if (plt == htab->elf.splt)
5285 got_offset = h->plt.offset / plt_entry_size - 1;
5286 got_offset = (got_offset + 3) * 4;
5290 got_offset = h->plt.offset / plt_entry_size;
5291 got_offset = got_offset * 4;
5294 /* Fill in the entry in the procedure linkage table. */
5295 if (! bfd_link_pic (info))
5297 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5298 abed->plt->plt_entry_size);
5299 bfd_put_32 (output_bfd,
5300 (gotplt->output_section->vma
5301 + gotplt->output_offset
5303 plt->contents + h->plt.offset
5304 + abed->plt->plt_got_offset);
5306 if (abed->is_vxworks)
5308 int s, k, reloc_index;
5310 /* Create the R_386_32 relocation referencing the GOT
5311 for this PLT entry. */
5313 /* S: Current slot number (zero-based). */
5314 s = ((h->plt.offset - abed->plt->plt_entry_size)
5315 / abed->plt->plt_entry_size);
5316 /* K: Number of relocations for PLTResolve. */
5317 if (bfd_link_pic (info))
5318 k = PLTRESOLVE_RELOCS_SHLIB;
5320 k = PLTRESOLVE_RELOCS;
5321 /* Skip the PLTresolve relocations, and the relocations for
5322 the other PLT slots. */
5323 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5324 loc = (htab->srelplt2->contents + reloc_index
5325 * sizeof (Elf32_External_Rel));
5327 rel.r_offset = (htab->elf.splt->output_section->vma
5328 + htab->elf.splt->output_offset
5329 + h->plt.offset + 2),
5330 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5331 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5333 /* Create the R_386_32 relocation referencing the beginning of
5334 the PLT for this GOT entry. */
5335 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5336 + htab->elf.sgotplt->output_offset
5338 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5339 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5340 loc + sizeof (Elf32_External_Rel));
5345 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5346 abed->plt->plt_entry_size);
5347 bfd_put_32 (output_bfd, got_offset,
5348 plt->contents + h->plt.offset
5349 + abed->plt->plt_got_offset);
5352 /* Fill in the entry in the global offset table. Leave the entry
5353 as zero for undefined weak symbol in PIE. No PLT relocation
5354 against undefined weak symbol in PIE. */
5355 if (!local_undefweak)
5357 bfd_put_32 (output_bfd,
5358 (plt->output_section->vma
5359 + plt->output_offset
5361 + abed->plt->plt_lazy_offset),
5362 gotplt->contents + got_offset);
5364 /* Fill in the entry in the .rel.plt section. */
5365 rel.r_offset = (gotplt->output_section->vma
5366 + gotplt->output_offset
5368 if (h->dynindx == -1
5369 || ((bfd_link_executable (info)
5370 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5372 && h->type == STT_GNU_IFUNC))
5374 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5375 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5376 in the .got.plt section. */
5377 bfd_put_32 (output_bfd,
5378 (h->root.u.def.value
5379 + h->root.u.def.section->output_section->vma
5380 + h->root.u.def.section->output_offset),
5381 gotplt->contents + got_offset);
5382 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5383 /* R_386_IRELATIVE comes last. */
5384 plt_index = htab->next_irelative_index--;
5388 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5389 plt_index = htab->next_jump_slot_index++;
5392 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5393 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5395 /* Don't fill PLT entry for static executables. */
5396 if (plt == htab->elf.splt)
5398 bfd_put_32 (output_bfd,
5399 plt_index * sizeof (Elf32_External_Rel),
5400 plt->contents + h->plt.offset
5401 + abed->plt->plt_reloc_offset);
5402 bfd_put_32 (output_bfd, - (h->plt.offset
5403 + abed->plt->plt_plt_offset + 4),
5404 plt->contents + h->plt.offset
5405 + abed->plt->plt_plt_offset);
5409 else if (eh->plt_got.offset != (bfd_vma) -1)
5411 bfd_vma got_offset, plt_offset;
5412 asection *plt, *got, *gotplt;
5413 const bfd_byte *got_plt_entry;
5415 /* Offset of displacement of the indirect jump. */
5416 bfd_vma plt_got_offset = 2;
5418 /* Set the entry in the GOT procedure linkage table. */
5419 plt = htab->plt_got;
5420 got = htab->elf.sgot;
5421 gotplt = htab->elf.sgotplt;
5422 got_offset = h->got.offset;
5424 if (got_offset == (bfd_vma) -1
5430 /* Fill in the entry in the GOT procedure linkage table. */
5431 if (! bfd_link_pic (info))
5433 got_plt_entry = elf_i386_got_plt_entry;
5434 got_offset += got->output_section->vma + got->output_offset;
5438 got_plt_entry = elf_i386_pic_got_plt_entry;
5439 got_offset += (got->output_section->vma
5440 + got->output_offset
5441 - gotplt->output_section->vma
5442 - gotplt->output_offset);
5445 plt_offset = eh->plt_got.offset;
5446 memcpy (plt->contents + plt_offset, got_plt_entry,
5447 sizeof (elf_i386_got_plt_entry));
5448 bfd_put_32 (output_bfd, got_offset,
5449 plt->contents + plt_offset + plt_got_offset);
5452 if (!local_undefweak
5454 && (h->plt.offset != (bfd_vma) -1
5455 || eh->plt_got.offset != (bfd_vma) -1))
5457 /* Mark the symbol as undefined, rather than as defined in
5458 the .plt section. Leave the value if there were any
5459 relocations where pointer equality matters (this is a clue
5460 for the dynamic linker, to make function pointer
5461 comparisons work between an application and shared
5462 library), otherwise set it to zero. If a function is only
5463 called from a binary, there is no need to slow down
5464 shared libraries because of that. */
5465 sym->st_shndx = SHN_UNDEF;
5466 if (!h->pointer_equality_needed)
5470 /* Don't generate dynamic GOT relocation against undefined weak
5471 symbol in executable. */
5472 if (h->got.offset != (bfd_vma) -1
5473 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5474 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5475 && !local_undefweak)
5477 Elf_Internal_Rela rel;
5478 asection *relgot = htab->elf.srelgot;
5480 /* This symbol has an entry in the global offset table. Set it
5483 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5486 rel.r_offset = (htab->elf.sgot->output_section->vma
5487 + htab->elf.sgot->output_offset
5488 + (h->got.offset & ~(bfd_vma) 1));
5490 /* If this is a static link, or it is a -Bsymbolic link and the
5491 symbol is defined locally or was forced to be local because
5492 of a version file, we just want to emit a RELATIVE reloc.
5493 The entry in the global offset table will already have been
5494 initialized in the relocate_section function. */
5496 && h->type == STT_GNU_IFUNC)
5498 if (h->plt.offset == (bfd_vma) -1)
5500 /* STT_GNU_IFUNC is referenced without PLT. */
5501 if (htab->elf.splt == NULL)
5503 /* use .rel[a].iplt section to store .got relocations
5504 in static executable. */
5505 relgot = htab->elf.irelplt;
5507 if (SYMBOL_REFERENCES_LOCAL (info, h))
5509 bfd_put_32 (output_bfd,
5510 (h->root.u.def.value
5511 + h->root.u.def.section->output_section->vma
5512 + h->root.u.def.section->output_offset),
5513 htab->elf.sgot->contents + h->got.offset);
5514 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5519 else if (bfd_link_pic (info))
5521 /* Generate R_386_GLOB_DAT. */
5528 if (!h->pointer_equality_needed)
5531 /* For non-shared object, we can't use .got.plt, which
5532 contains the real function addres if we need pointer
5533 equality. We load the GOT entry with the PLT entry. */
5534 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5535 bfd_put_32 (output_bfd,
5536 (plt->output_section->vma
5537 + plt->output_offset + h->plt.offset),
5538 htab->elf.sgot->contents + h->got.offset);
5542 else if (bfd_link_pic (info)
5543 && SYMBOL_REFERENCES_LOCAL (info, h))
5545 BFD_ASSERT((h->got.offset & 1) != 0);
5546 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5550 BFD_ASSERT((h->got.offset & 1) == 0);
5552 bfd_put_32 (output_bfd, (bfd_vma) 0,
5553 htab->elf.sgot->contents + h->got.offset);
5554 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5557 elf_append_rel (output_bfd, relgot, &rel);
5562 Elf_Internal_Rela rel;
5564 /* This symbol needs a copy reloc. Set it up. */
5566 if (h->dynindx == -1
5567 || (h->root.type != bfd_link_hash_defined
5568 && h->root.type != bfd_link_hash_defweak)
5569 || htab->srelbss == NULL)
5572 rel.r_offset = (h->root.u.def.value
5573 + h->root.u.def.section->output_section->vma
5574 + h->root.u.def.section->output_offset);
5575 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5576 elf_append_rel (output_bfd, htab->srelbss, &rel);
5582 /* Finish up local dynamic symbol handling. We set the contents of
5583 various dynamic sections here. */
5586 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5588 struct elf_link_hash_entry *h
5589 = (struct elf_link_hash_entry *) *slot;
5590 struct bfd_link_info *info
5591 = (struct bfd_link_info *) inf;
5593 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5597 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5598 here since undefined weak symbol may not be dynamic and may not be
5599 called for elf_i386_finish_dynamic_symbol. */
5602 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5605 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5606 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5608 if (h->root.type != bfd_link_hash_undefweak
5609 || h->dynindx != -1)
5612 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5616 /* Used to decide how to sort relocs in an optimal manner for the
5617 dynamic linker, before writing them out. */
5619 static enum elf_reloc_type_class
5620 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5621 const asection *rel_sec ATTRIBUTE_UNUSED,
5622 const Elf_Internal_Rela *rela)
5624 bfd *abfd = info->output_bfd;
5625 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5626 struct elf_link_hash_table *htab = elf_hash_table (info);
5628 if (htab->dynsym != NULL
5629 && htab->dynsym->contents != NULL)
5631 /* Check relocation against STT_GNU_IFUNC symbol if there are
5633 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5634 if (r_symndx != STN_UNDEF)
5636 Elf_Internal_Sym sym;
5637 if (!bed->s->swap_symbol_in (abfd,
5638 (htab->dynsym->contents
5639 + r_symndx * sizeof (Elf32_External_Sym)),
5643 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5644 return reloc_class_ifunc;
5648 switch (ELF32_R_TYPE (rela->r_info))
5650 case R_386_IRELATIVE:
5651 return reloc_class_ifunc;
5652 case R_386_RELATIVE:
5653 return reloc_class_relative;
5654 case R_386_JUMP_SLOT:
5655 return reloc_class_plt;
5657 return reloc_class_copy;
5659 return reloc_class_normal;
5663 /* Finish up the dynamic sections. */
5666 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5667 struct bfd_link_info *info)
5669 struct elf_i386_link_hash_table *htab;
5672 const struct elf_i386_backend_data *abed;
5674 htab = elf_i386_hash_table (info);
5678 dynobj = htab->elf.dynobj;
5679 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5680 abed = get_elf_i386_backend_data (output_bfd);
5682 if (htab->elf.dynamic_sections_created)
5684 Elf32_External_Dyn *dyncon, *dynconend;
5686 if (sdyn == NULL || htab->elf.sgot == NULL)
5689 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5690 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5691 for (; dyncon < dynconend; dyncon++)
5693 Elf_Internal_Dyn dyn;
5696 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5701 if (abed->is_vxworks
5702 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5707 s = htab->elf.sgotplt;
5708 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5712 s = htab->elf.srelplt;
5713 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5717 s = htab->elf.srelplt;
5718 dyn.d_un.d_val = s->size;
5722 /* My reading of the SVR4 ABI indicates that the
5723 procedure linkage table relocs (DT_JMPREL) should be
5724 included in the overall relocs (DT_REL). This is
5725 what Solaris does. However, UnixWare can not handle
5726 that case. Therefore, we override the DT_RELSZ entry
5727 here to make it not include the JMPREL relocs. */
5728 s = htab->elf.srelplt;
5731 dyn.d_un.d_val -= s->size;
5735 /* We may not be using the standard ELF linker script.
5736 If .rel.plt is the first .rel section, we adjust
5737 DT_REL to not include it. */
5738 s = htab->elf.srelplt;
5741 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5743 dyn.d_un.d_ptr += s->size;
5747 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5750 /* Fill in the first entry in the procedure linkage table. */
5751 if (htab->elf.splt && htab->elf.splt->size > 0)
5753 if (bfd_link_pic (info))
5755 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5756 abed->plt->plt0_entry_size);
5757 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5758 abed->plt0_pad_byte,
5759 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5763 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5764 abed->plt->plt0_entry_size);
5765 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5766 abed->plt0_pad_byte,
5767 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5768 bfd_put_32 (output_bfd,
5769 (htab->elf.sgotplt->output_section->vma
5770 + htab->elf.sgotplt->output_offset
5772 htab->elf.splt->contents
5773 + abed->plt->plt0_got1_offset);
5774 bfd_put_32 (output_bfd,
5775 (htab->elf.sgotplt->output_section->vma
5776 + htab->elf.sgotplt->output_offset
5778 htab->elf.splt->contents
5779 + abed->plt->plt0_got2_offset);
5781 if (abed->is_vxworks)
5783 Elf_Internal_Rela rel;
5785 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5786 On IA32 we use REL relocations so the addend goes in
5787 the PLT directly. */
5788 rel.r_offset = (htab->elf.splt->output_section->vma
5789 + htab->elf.splt->output_offset
5790 + abed->plt->plt0_got1_offset);
5791 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5792 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5793 htab->srelplt2->contents);
5794 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5795 rel.r_offset = (htab->elf.splt->output_section->vma
5796 + htab->elf.splt->output_offset
5797 + abed->plt->plt0_got2_offset);
5798 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5799 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5800 htab->srelplt2->contents +
5801 sizeof (Elf32_External_Rel));
5805 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5806 really seem like the right value. */
5807 elf_section_data (htab->elf.splt->output_section)
5808 ->this_hdr.sh_entsize = 4;
5810 /* Correct the .rel.plt.unloaded relocations. */
5811 if (abed->is_vxworks && !bfd_link_pic (info))
5813 int num_plts = (htab->elf.splt->size
5814 / abed->plt->plt_entry_size) - 1;
5817 p = htab->srelplt2->contents;
5818 if (bfd_link_pic (info))
5819 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5821 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5823 for (; num_plts; num_plts--)
5825 Elf_Internal_Rela rel;
5826 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5827 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5828 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5829 p += sizeof (Elf32_External_Rel);
5831 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5832 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5833 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5834 p += sizeof (Elf32_External_Rel);
5840 if (htab->elf.sgotplt)
5842 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5844 (*_bfd_error_handler)
5845 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5849 /* Fill in the first three entries in the global offset table. */
5850 if (htab->elf.sgotplt->size > 0)
5852 bfd_put_32 (output_bfd,
5854 : sdyn->output_section->vma + sdyn->output_offset),
5855 htab->elf.sgotplt->contents);
5856 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5857 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5860 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5863 /* Adjust .eh_frame for .plt section. */
5864 if (htab->plt_eh_frame != NULL
5865 && htab->plt_eh_frame->contents != NULL)
5867 if (htab->elf.splt != NULL
5868 && htab->elf.splt->size != 0
5869 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5870 && htab->elf.splt->output_section != NULL
5871 && htab->plt_eh_frame->output_section != NULL)
5873 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5874 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5875 + htab->plt_eh_frame->output_offset
5876 + PLT_FDE_START_OFFSET;
5877 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5878 htab->plt_eh_frame->contents
5879 + PLT_FDE_START_OFFSET);
5881 if (htab->plt_eh_frame->sec_info_type
5882 == SEC_INFO_TYPE_EH_FRAME)
5884 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5886 htab->plt_eh_frame->contents))
5891 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5892 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5894 /* Fill PLT entries for undefined weak symbols in PIE. */
5895 if (bfd_link_pie (info))
5896 bfd_hash_traverse (&info->hash->table,
5897 elf_i386_pie_finish_undefweak_symbol,
5903 /* Fill PLT/GOT entries and allocate dynamic relocations for local
5904 STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table.
5905 It has to be done before elf_link_sort_relocs is called so that
5906 dynamic relocations are properly sorted. */
5909 elf_i386_output_arch_local_syms
5910 (bfd *output_bfd ATTRIBUTE_UNUSED,
5911 struct bfd_link_info *info,
5912 void *flaginfo ATTRIBUTE_UNUSED,
5913 int (*func) (void *, const char *,
5916 struct elf_link_hash_entry *) ATTRIBUTE_UNUSED)
5918 struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info);
5922 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5923 htab_traverse (htab->loc_hash_table,
5924 elf_i386_finish_local_dynamic_symbol,
5930 /* Return an array of PLT entry symbol values. */
5933 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5936 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5939 bfd_vma *plt_sym_val;
5941 bfd_byte *plt_contents;
5942 const struct elf_i386_backend_data *bed
5943 = get_elf_i386_backend_data (abfd);
5944 Elf_Internal_Shdr *hdr;
5946 /* Get the .plt section contents. */
5947 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5948 if (plt_contents == NULL)
5950 if (!bfd_get_section_contents (abfd, (asection *) plt,
5951 plt_contents, 0, plt->size))
5954 free (plt_contents);
5958 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5959 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5962 hdr = &elf_section_data (relplt)->this_hdr;
5963 count = relplt->size / hdr->sh_entsize;
5965 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5966 if (plt_sym_val == NULL)
5969 for (i = 0; i < count; i++)
5970 plt_sym_val[i] = -1;
5972 plt_offset = bed->plt->plt_entry_size;
5973 p = relplt->relocation;
5974 for (i = 0; i < count; i++, p++)
5978 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5979 if (p->howto == NULL)
5982 if (p->howto->type != R_386_JUMP_SLOT
5983 && p->howto->type != R_386_IRELATIVE)
5986 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5987 + bed->plt->plt_reloc_offset));
5988 reloc_index /= sizeof (Elf32_External_Rel);
5989 if (reloc_index < count)
5990 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5992 plt_offset += bed->plt->plt_entry_size;
5994 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5996 if (plt_offset >= plt->size)
6000 free (plt_contents);
6005 /* Similar to _bfd_elf_get_synthetic_symtab. */
6008 elf_i386_get_synthetic_symtab (bfd *abfd,
6015 asection *plt = bfd_get_section_by_name (abfd, ".plt");
6016 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
6017 dynsymcount, dynsyms, ret,
6019 elf_i386_get_plt_sym_val);
6022 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
6025 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
6027 if (h->plt.offset != (bfd_vma) -1
6029 && !h->pointer_equality_needed)
6032 return _bfd_elf_hash_symbol (h);
6035 #define TARGET_LITTLE_SYM i386_elf32_vec
6036 #define TARGET_LITTLE_NAME "elf32-i386"
6037 #define ELF_ARCH bfd_arch_i386
6038 #define ELF_TARGET_ID I386_ELF_DATA
6039 #define ELF_MACHINE_CODE EM_386
6040 #define ELF_MAXPAGESIZE 0x1000
6042 #define elf_backend_can_gc_sections 1
6043 #define elf_backend_can_refcount 1
6044 #define elf_backend_want_got_plt 1
6045 #define elf_backend_plt_readonly 1
6046 #define elf_backend_want_plt_sym 0
6047 #define elf_backend_got_header_size 12
6048 #define elf_backend_plt_alignment 4
6049 #define elf_backend_extern_protected_data 1
6050 #define elf_backend_caches_rawsize 1
6052 /* Support RELA for objdump of prelink objects. */
6053 #define elf_info_to_howto elf_i386_info_to_howto_rel
6054 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
6056 #define bfd_elf32_mkobject elf_i386_mkobject
6058 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
6059 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
6060 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
6061 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
6062 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
6064 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
6065 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
6066 #define elf_backend_check_relocs elf_i386_check_relocs
6067 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6068 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
6069 #define elf_backend_fake_sections elf_i386_fake_sections
6070 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
6071 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
6072 #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms
6073 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
6074 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
6075 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
6076 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
6077 #define elf_backend_relocate_section elf_i386_relocate_section
6078 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
6079 #define elf_backend_always_size_sections elf_i386_always_size_sections
6080 #define elf_backend_omit_section_dynsym \
6081 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
6082 #define elf_backend_hash_symbol elf_i386_hash_symbol
6083 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
6085 #include "elf32-target.h"
6087 /* FreeBSD support. */
6089 #undef TARGET_LITTLE_SYM
6090 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
6091 #undef TARGET_LITTLE_NAME
6092 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
6094 #define ELF_OSABI ELFOSABI_FREEBSD
6096 /* The kernel recognizes executables as valid only if they carry a
6097 "FreeBSD" label in the ELF header. So we put this label on all
6098 executables and (for simplicity) also all other object files. */
6101 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
6103 _bfd_elf_post_process_headers (abfd, info);
6105 #ifdef OLD_FREEBSD_ABI_LABEL
6107 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6108 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6109 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
6114 #undef elf_backend_post_process_headers
6115 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6117 #define elf32_bed elf32_i386_fbsd_bed
6119 #undef elf_backend_add_symbol_hook
6121 #include "elf32-target.h"
6125 #undef TARGET_LITTLE_SYM
6126 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6127 #undef TARGET_LITTLE_NAME
6128 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6130 #undef elf_backend_post_process_headers
6132 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6133 objects won't be recognized. */
6137 #define elf32_bed elf32_i386_sol2_bed
6139 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6141 #undef elf_backend_static_tls_alignment
6142 #define elf_backend_static_tls_alignment 8
6144 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6146 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6148 #undef elf_backend_want_plt_sym
6149 #define elf_backend_want_plt_sym 1
6151 #undef elf_backend_strtab_flags
6152 #define elf_backend_strtab_flags SHF_STRINGS
6154 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
6155 has a type >= SHT_LOOS. Returns TRUE if these fields were initialised
6156 FALSE otherwise. ISECTION is the best guess matching section from the
6157 input bfd IBFD, but it might be NULL. */
6160 elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED,
6161 bfd *obfd ATTRIBUTE_UNUSED,
6162 const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED,
6163 Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED)
6165 /* PR 19938: FIXME: Need to add code for setting the sh_info
6166 and sh_link fields of Solaris specific section types. */
6169 /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13,
6170 Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation:
6172 http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc
6174 The following values should be set:
6177 -----------------------------------------------------------------------------
6178 SHT_SUNW_ancillary The section header index of 0
6179 [0x6fffffee] the associated string table.
6181 SHT_SUNW_capinfo The section header index of For a dynamic object, the
6182 [0x6ffffff0] the associated symbol table. section header index of
6184 SHT_SUNW_capchain table,
6187 SHT_SUNW_symsort The section header index of 0
6188 [0x6ffffff1] the associated symbol table.
6190 SHT_SUNW_tlssort The section header index of 0
6191 [0x6ffffff2] the associated symbol table.
6193 SHT_SUNW_LDYNSYM The section header index of One greater than the
6194 [0x6ffffff3] the associated string table. symbol table index of the
6195 This index is the same string last local symbol,
6196 table used by the SHT_DYNSYM STB_LOCAL. Since
6197 section. SHT_SUNW_LDYNSYM only
6198 contains local symbols,
6199 sh_info is equivalent to
6200 the number of symbols in
6203 SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer
6204 [0x6ffffff5] the section header index of to named strings, the
6205 the associated section header index of
6206 SHT_SUNW_capinfo table, the associated string
6207 otherwise 0. table, otherwise 0.
6209 SHT_SUNW_move The section header index of 0
6210 [0x6ffffffa] the associated symbol table.
6215 SHT_SUNW_syminfo The section header index of The section header index
6216 [0x6ffffffc] the associated symbol table. of the associated
6219 SHT_SUNW_verdef The section header index of The number of version
6220 [0x6ffffffd] the associated string table. definitions within the
6223 SHT_SUNW_verneed The section header index of The number of version
6224 [0x6ffffffe] the associated string table. dependencies within the
6227 SHT_SUNW_versym The section header index of 0
6228 [0x6fffffff] the associated symbol table. */
6231 #undef elf_backend_copy_special_section_fields
6232 #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields
6234 #include "elf32-target.h"
6236 /* Intel MCU support. */
6239 elf32_iamcu_elf_object_p (bfd *abfd)
6241 /* Set the right machine number for an IAMCU elf32 file. */
6242 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6246 #undef TARGET_LITTLE_SYM
6247 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6248 #undef TARGET_LITTLE_NAME
6249 #define TARGET_LITTLE_NAME "elf32-iamcu"
6251 #define ELF_ARCH bfd_arch_iamcu
6253 #undef ELF_MACHINE_CODE
6254 #define ELF_MACHINE_CODE EM_IAMCU
6259 #define elf32_bed elf32_iamcu_bed
6261 #undef elf_backend_object_p
6262 #define elf_backend_object_p elf32_iamcu_elf_object_p
6264 #undef elf_backend_static_tls_alignment
6266 #undef elf_backend_want_plt_sym
6267 #define elf_backend_want_plt_sym 0
6269 #undef elf_backend_strtab_flags
6270 #undef elf_backend_copy_special_section_fields
6272 #include "elf32-target.h"
6274 /* Restore defaults. */
6276 #define ELF_ARCH bfd_arch_i386
6277 #undef ELF_MACHINE_CODE
6278 #define ELF_MACHINE_CODE EM_386
6280 /* Native Client support. */
6282 #undef TARGET_LITTLE_SYM
6283 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6284 #undef TARGET_LITTLE_NAME
6285 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6287 #define elf32_bed elf32_i386_nacl_bed
6289 #undef ELF_MAXPAGESIZE
6290 #define ELF_MAXPAGESIZE 0x10000
6292 /* Restore defaults. */
6294 #undef elf_backend_want_plt_sym
6295 #define elf_backend_want_plt_sym 0
6296 #undef elf_backend_post_process_headers
6297 #undef elf_backend_static_tls_alignment
6299 /* NaCl uses substantially different PLT entries for the same effects. */
6301 #undef elf_backend_plt_alignment
6302 #define elf_backend_plt_alignment 5
6303 #define NACL_PLT_ENTRY_SIZE 64
6304 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6306 static const bfd_byte elf_i386_nacl_plt0_entry[] =
6308 0xff, 0x35, /* pushl contents of address */
6309 0, 0, 0, 0, /* replaced with address of .got + 4. */
6310 0x8b, 0x0d, /* movl contents of address, %ecx */
6311 0, 0, 0, 0, /* replaced with address of .got + 8. */
6312 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6313 0xff, 0xe1 /* jmp *%ecx */
6316 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6318 0x8b, 0x0d, /* movl contents of address, %ecx */
6319 0, 0, 0, 0, /* replaced with GOT slot address. */
6320 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6321 0xff, 0xe1, /* jmp *%ecx */
6323 /* Pad to the next 32-byte boundary with nop instructions. */
6325 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6326 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6328 /* Lazy GOT entries point here (32-byte aligned). */
6329 0x68, /* pushl immediate */
6330 0, 0, 0, 0, /* replaced with reloc offset. */
6331 0xe9, /* jmp relative */
6332 0, 0, 0, 0, /* replaced with offset to .plt. */
6334 /* Pad to the next 32-byte boundary with nop instructions. */
6335 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6336 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6340 static const bfd_byte
6341 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6343 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6344 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6345 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6346 0xff, 0xe1, /* jmp *%ecx */
6348 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6349 so pad to that size with nop instructions. */
6350 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6353 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6355 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6356 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6357 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6358 0xff, 0xe1, /* jmp *%ecx */
6360 /* Pad to the next 32-byte boundary with nop instructions. */
6362 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6363 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6365 /* Lazy GOT entries point here (32-byte aligned). */
6366 0x68, /* pushl immediate */
6367 0, 0, 0, 0, /* replaced with offset into relocation table. */
6368 0xe9, /* jmp relative */
6369 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6371 /* Pad to the next 32-byte boundary with nop instructions. */
6372 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6373 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6377 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6379 #if (PLT_CIE_LENGTH != 20 \
6380 || PLT_FDE_LENGTH != 36 \
6381 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6382 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6383 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6385 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6386 0, 0, 0, 0, /* CIE ID */
6387 1, /* CIE version */
6388 'z', 'R', 0, /* Augmentation string */
6389 1, /* Code alignment factor */
6390 0x7c, /* Data alignment factor: -4 */
6391 8, /* Return address column */
6392 1, /* Augmentation size */
6393 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6394 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6395 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6396 DW_CFA_nop, DW_CFA_nop,
6398 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6399 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6400 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6401 0, 0, 0, 0, /* .plt size goes here */
6402 0, /* Augmentation size */
6403 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6404 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6405 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6406 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6407 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6408 13, /* Block length */
6409 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6410 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6411 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6412 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6413 DW_CFA_nop, DW_CFA_nop
6416 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6418 elf_i386_nacl_plt0_entry, /* plt0_entry */
6419 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6420 2, /* plt0_got1_offset */
6421 8, /* plt0_got2_offset */
6422 elf_i386_nacl_plt_entry, /* plt_entry */
6423 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6424 2, /* plt_got_offset */
6425 33, /* plt_reloc_offset */
6426 38, /* plt_plt_offset */
6427 32, /* plt_lazy_offset */
6428 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6429 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6430 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6431 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6434 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6436 &elf_i386_nacl_plt, /* plt */
6437 0x90, /* plt0_pad_byte: nop insn */
6442 elf32_i386_nacl_elf_object_p (bfd *abfd)
6444 /* Set the right machine number for a NaCl i386 ELF32 file. */
6445 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6449 #undef elf_backend_arch_data
6450 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6452 #undef elf_backend_object_p
6453 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6454 #undef elf_backend_modify_segment_map
6455 #define elf_backend_modify_segment_map nacl_modify_segment_map
6456 #undef elf_backend_modify_program_headers
6457 #define elf_backend_modify_program_headers nacl_modify_program_headers
6458 #undef elf_backend_final_write_processing
6459 #define elf_backend_final_write_processing nacl_final_write_processing
6461 #include "elf32-target.h"
6463 /* Restore defaults. */
6464 #undef elf_backend_object_p
6465 #undef elf_backend_modify_segment_map
6466 #undef elf_backend_modify_program_headers
6467 #undef elf_backend_final_write_processing
6469 /* VxWorks support. */
6471 #undef TARGET_LITTLE_SYM
6472 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6473 #undef TARGET_LITTLE_NAME
6474 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6476 #undef elf_backend_plt_alignment
6477 #define elf_backend_plt_alignment 4
6479 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6481 &elf_i386_plt, /* plt */
6482 0x90, /* plt0_pad_byte */
6486 #undef elf_backend_arch_data
6487 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6489 #undef elf_backend_relocs_compatible
6490 #undef elf_backend_add_symbol_hook
6491 #define elf_backend_add_symbol_hook \
6492 elf_vxworks_add_symbol_hook
6493 #undef elf_backend_link_output_symbol_hook
6494 #define elf_backend_link_output_symbol_hook \
6495 elf_vxworks_link_output_symbol_hook
6496 #undef elf_backend_emit_relocs
6497 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6498 #undef elf_backend_final_write_processing
6499 #define elf_backend_final_write_processing \
6500 elf_vxworks_final_write_processing
6501 #undef elf_backend_static_tls_alignment
6503 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6505 #undef elf_backend_want_plt_sym
6506 #define elf_backend_want_plt_sym 1
6509 #define elf32_bed elf32_i386_vxworks_bed
6511 #include "elf32-target.h"