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, EH) \
747 ((EH)->elf.root.type == bfd_link_hash_undefweak \
748 && bfd_link_executable (INFO) \
749 && (elf_i386_hash_table (INFO)->interp == NULL \
750 || !(EH)->has_got_reloc \
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 /* Reference count of C/C++ function pointer relocations in read-write
791 section which can be resolved at run-time. */
792 bfd_signed_vma func_pointer_refcount;
794 /* Information about the GOT PLT entry. Filled when there are both
795 GOT and PLT relocations against the same function. */
796 union gotplt_union plt_got;
798 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
799 starting at the end of the jump table. */
803 #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
805 struct elf_i386_obj_tdata
807 struct elf_obj_tdata root;
809 /* tls_type for each local got entry. */
810 char *local_got_tls_type;
812 /* GOTPLT entries for TLS descriptors. */
813 bfd_vma *local_tlsdesc_gotent;
816 #define elf_i386_tdata(abfd) \
817 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
819 #define elf_i386_local_got_tls_type(abfd) \
820 (elf_i386_tdata (abfd)->local_got_tls_type)
822 #define elf_i386_local_tlsdesc_gotent(abfd) \
823 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
825 #define is_i386_elf(bfd) \
826 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
827 && elf_tdata (bfd) != NULL \
828 && elf_object_id (bfd) == I386_ELF_DATA)
831 elf_i386_mkobject (bfd *abfd)
833 return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata),
837 /* i386 ELF linker hash table. */
839 struct elf_i386_link_hash_table
841 struct elf_link_hash_table elf;
843 /* Short-cuts to get to dynamic linker sections. */
847 asection *plt_eh_frame;
852 bfd_signed_vma refcount;
856 /* The amount of space used by the reserved portion of the sgotplt
857 section, plus whatever space is used by the jump slots. */
858 bfd_vma sgotplt_jump_table_size;
860 /* Small local sym cache. */
861 struct sym_cache sym_cache;
863 /* _TLS_MODULE_BASE_ symbol. */
864 struct bfd_link_hash_entry *tls_module_base;
866 /* Used by local STT_GNU_IFUNC symbols. */
867 htab_t loc_hash_table;
868 void * loc_hash_memory;
870 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
873 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
874 bfd_vma next_tls_desc_index;
876 /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */
877 bfd_vma next_jump_slot_index;
879 /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */
880 bfd_vma next_irelative_index;
883 /* Get the i386 ELF linker hash table from a link_info structure. */
885 #define elf_i386_hash_table(p) \
886 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
887 == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL)
889 #define elf_i386_compute_jump_table_size(htab) \
890 ((htab)->elf.srelplt->reloc_count * 4)
892 /* Create an entry in an i386 ELF linker hash table. */
894 static struct bfd_hash_entry *
895 elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry,
896 struct bfd_hash_table *table,
899 /* Allocate the structure if it has not already been allocated by a
903 entry = (struct bfd_hash_entry *)
904 bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry));
909 /* Call the allocation method of the superclass. */
910 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
913 struct elf_i386_link_hash_entry *eh;
915 eh = (struct elf_i386_link_hash_entry *) entry;
916 eh->dyn_relocs = NULL;
917 eh->tls_type = GOT_UNKNOWN;
919 eh->has_got_reloc = 0;
920 eh->has_non_got_reloc = 0;
921 eh->func_pointer_refcount = 0;
922 eh->plt_got.offset = (bfd_vma) -1;
923 eh->tlsdesc_got = (bfd_vma) -1;
929 /* Compute a hash of a local hash entry. We use elf_link_hash_entry
930 for local symbol so that we can handle local STT_GNU_IFUNC symbols
931 as global symbol. We reuse indx and dynstr_index for local symbol
932 hash since they aren't used by global symbols in this backend. */
935 elf_i386_local_htab_hash (const void *ptr)
937 struct elf_link_hash_entry *h
938 = (struct elf_link_hash_entry *) ptr;
939 return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index);
942 /* Compare local hash entries. */
945 elf_i386_local_htab_eq (const void *ptr1, const void *ptr2)
947 struct elf_link_hash_entry *h1
948 = (struct elf_link_hash_entry *) ptr1;
949 struct elf_link_hash_entry *h2
950 = (struct elf_link_hash_entry *) ptr2;
952 return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index;
955 /* Find and/or create a hash entry for local symbol. */
957 static struct elf_link_hash_entry *
958 elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab,
959 bfd *abfd, const Elf_Internal_Rela *rel,
962 struct elf_i386_link_hash_entry e, *ret;
963 asection *sec = abfd->sections;
964 hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id,
965 ELF32_R_SYM (rel->r_info));
968 e.elf.indx = sec->id;
969 e.elf.dynstr_index = ELF32_R_SYM (rel->r_info);
970 slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h,
971 create ? INSERT : NO_INSERT);
978 ret = (struct elf_i386_link_hash_entry *) *slot;
982 ret = (struct elf_i386_link_hash_entry *)
983 objalloc_alloc ((struct objalloc *) htab->loc_hash_memory,
984 sizeof (struct elf_i386_link_hash_entry));
987 memset (ret, 0, sizeof (*ret));
988 ret->elf.indx = sec->id;
989 ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info);
990 ret->elf.dynindx = -1;
991 ret->func_pointer_refcount = 0;
992 ret->plt_got.offset = (bfd_vma) -1;
998 /* Destroy an i386 ELF linker hash table. */
1001 elf_i386_link_hash_table_free (bfd *obfd)
1003 struct elf_i386_link_hash_table *htab
1004 = (struct elf_i386_link_hash_table *) obfd->link.hash;
1006 if (htab->loc_hash_table)
1007 htab_delete (htab->loc_hash_table);
1008 if (htab->loc_hash_memory)
1009 objalloc_free ((struct objalloc *) htab->loc_hash_memory);
1010 _bfd_elf_link_hash_table_free (obfd);
1013 /* Create an i386 ELF linker hash table. */
1015 static struct bfd_link_hash_table *
1016 elf_i386_link_hash_table_create (bfd *abfd)
1018 struct elf_i386_link_hash_table *ret;
1019 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
1021 ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt);
1025 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
1026 elf_i386_link_hash_newfunc,
1027 sizeof (struct elf_i386_link_hash_entry),
1034 ret->loc_hash_table = htab_try_create (1024,
1035 elf_i386_local_htab_hash,
1036 elf_i386_local_htab_eq,
1038 ret->loc_hash_memory = objalloc_create ();
1039 if (!ret->loc_hash_table || !ret->loc_hash_memory)
1041 elf_i386_link_hash_table_free (abfd);
1044 ret->elf.root.hash_table_free = elf_i386_link_hash_table_free;
1046 return &ret->elf.root;
1049 /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
1050 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
1054 elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
1056 struct elf_i386_link_hash_table *htab;
1058 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
1061 htab = elf_i386_hash_table (info);
1065 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
1069 if (bfd_link_executable (info))
1071 /* Always allow copy relocs for building executables. */
1072 asection *s = bfd_get_linker_section (dynobj, ".rel.bss");
1075 const struct elf_backend_data *bed = get_elf_backend_data (dynobj);
1076 s = bfd_make_section_anyway_with_flags (dynobj,
1078 (bed->dynamic_sec_flags
1081 || ! bfd_set_section_alignment (dynobj, s,
1082 bed->s->log_file_align))
1088 if (get_elf_i386_backend_data (dynobj)->is_vxworks
1089 && !elf_vxworks_create_dynamic_sections (dynobj, info,
1093 if (!info->no_ld_generated_unwind_info
1094 && htab->plt_eh_frame == NULL
1095 && htab->elf.splt != NULL)
1097 flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY
1098 | SEC_HAS_CONTENTS | SEC_IN_MEMORY
1099 | SEC_LINKER_CREATED);
1101 = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags);
1102 if (htab->plt_eh_frame == NULL
1103 || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2))
1110 /* Copy the extra info we tack onto an elf_link_hash_entry. */
1113 elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
1114 struct elf_link_hash_entry *dir,
1115 struct elf_link_hash_entry *ind)
1117 struct elf_i386_link_hash_entry *edir, *eind;
1119 edir = (struct elf_i386_link_hash_entry *) dir;
1120 eind = (struct elf_i386_link_hash_entry *) ind;
1122 if (eind->dyn_relocs != NULL)
1124 if (edir->dyn_relocs != NULL)
1126 struct elf_dyn_relocs **pp;
1127 struct elf_dyn_relocs *p;
1129 /* Add reloc counts against the indirect sym to the direct sym
1130 list. Merge any entries against the same section. */
1131 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
1133 struct elf_dyn_relocs *q;
1135 for (q = edir->dyn_relocs; q != NULL; q = q->next)
1136 if (q->sec == p->sec)
1138 q->pc_count += p->pc_count;
1139 q->count += p->count;
1146 *pp = edir->dyn_relocs;
1149 edir->dyn_relocs = eind->dyn_relocs;
1150 eind->dyn_relocs = NULL;
1153 if (ind->root.type == bfd_link_hash_indirect
1154 && dir->got.refcount <= 0)
1156 edir->tls_type = eind->tls_type;
1157 eind->tls_type = GOT_UNKNOWN;
1160 /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will
1161 generate a R_386_COPY reloc. */
1162 edir->gotoff_ref |= eind->gotoff_ref;
1164 edir->has_got_reloc |= eind->has_got_reloc;
1165 edir->has_non_got_reloc |= eind->has_non_got_reloc;
1167 if (ELIMINATE_COPY_RELOCS
1168 && ind->root.type != bfd_link_hash_indirect
1169 && dir->dynamic_adjusted)
1171 /* If called to transfer flags for a weakdef during processing
1172 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
1173 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
1174 dir->ref_dynamic |= ind->ref_dynamic;
1175 dir->ref_regular |= ind->ref_regular;
1176 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
1177 dir->needs_plt |= ind->needs_plt;
1178 dir->pointer_equality_needed |= ind->pointer_equality_needed;
1182 if (eind->func_pointer_refcount > 0)
1184 edir->func_pointer_refcount += eind->func_pointer_refcount;
1185 eind->func_pointer_refcount = 0;
1188 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
1192 /* Return TRUE if the TLS access code sequence support transition
1196 elf_i386_check_tls_transition (bfd *abfd, asection *sec,
1198 Elf_Internal_Shdr *symtab_hdr,
1199 struct elf_link_hash_entry **sym_hashes,
1200 unsigned int r_type,
1201 const Elf_Internal_Rela *rel,
1202 const Elf_Internal_Rela *relend)
1204 unsigned int val, type;
1205 unsigned long r_symndx;
1206 struct elf_link_hash_entry *h;
1209 /* Get the section contents. */
1210 if (contents == NULL)
1212 if (elf_section_data (sec)->this_hdr.contents != NULL)
1213 contents = elf_section_data (sec)->this_hdr.contents;
1216 /* FIXME: How to better handle error condition? */
1217 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
1220 /* Cache the section contents for elf_link_input_bfd. */
1221 elf_section_data (sec)->this_hdr.contents = contents;
1225 offset = rel->r_offset;
1230 if (offset < 2 || (rel + 1) >= relend)
1233 type = bfd_get_8 (abfd, contents + offset - 2);
1234 if (r_type == R_386_TLS_GD)
1236 /* Check transition from GD access model. Only
1237 leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr
1238 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop
1239 can transit to different access model. */
1240 if ((offset + 10) > sec->size ||
1241 (type != 0x8d && type != 0x04))
1244 val = bfd_get_8 (abfd, contents + offset - 1);
1247 /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */
1251 if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d)
1254 if ((val & 0xc7) != 0x05 || val == (4 << 3))
1259 /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */
1260 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1263 if (bfd_get_8 (abfd, contents + offset + 9) != 0x90)
1269 /* Check transition from LD access model. Only
1270 leal foo@tlsgd(%reg), %eax; call ___tls_get_addr
1271 can transit to different access model. */
1272 if (type != 0x8d || (offset + 9) > sec->size)
1275 val = bfd_get_8 (abfd, contents + offset - 1);
1276 if ((val & 0xf8) != 0x80 || (val & 7) == 4)
1280 if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8)
1283 r_symndx = ELF32_R_SYM (rel[1].r_info);
1284 if (r_symndx < symtab_hdr->sh_info)
1287 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1288 /* Use strncmp to check ___tls_get_addr since ___tls_get_addr
1289 may be versioned. */
1291 && h->root.root.string != NULL
1292 && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32
1293 || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32)
1294 && (strncmp (h->root.root.string, "___tls_get_addr",
1298 /* Check transition from IE access model:
1299 movl foo@indntpoff(%rip), %eax
1300 movl foo@indntpoff(%rip), %reg
1301 addl foo@indntpoff(%rip), %reg
1304 if (offset < 1 || (offset + 4) > sec->size)
1307 /* Check "movl foo@tpoff(%rip), %eax" first. */
1308 val = bfd_get_8 (abfd, contents + offset - 1);
1315 /* Check movl|addl foo@tpoff(%rip), %reg. */
1316 type = bfd_get_8 (abfd, contents + offset - 2);
1317 return ((type == 0x8b || type == 0x03)
1318 && (val & 0xc7) == 0x05);
1320 case R_386_TLS_GOTIE:
1321 case R_386_TLS_IE_32:
1322 /* Check transition from {IE_32,GOTIE} access model:
1323 subl foo@{tpoff,gontoff}(%reg1), %reg2
1324 movl foo@{tpoff,gontoff}(%reg1), %reg2
1325 addl foo@{tpoff,gontoff}(%reg1), %reg2
1328 if (offset < 2 || (offset + 4) > sec->size)
1331 val = bfd_get_8 (abfd, contents + offset - 1);
1332 if ((val & 0xc0) != 0x80 || (val & 7) == 4)
1335 type = bfd_get_8 (abfd, contents + offset - 2);
1336 return type == 0x8b || type == 0x2b || type == 0x03;
1338 case R_386_TLS_GOTDESC:
1339 /* Check transition from GDesc access model:
1340 leal x@tlsdesc(%ebx), %eax
1342 Make sure it's a leal adding ebx to a 32-bit offset
1343 into any register, although it's probably almost always
1346 if (offset < 2 || (offset + 4) > sec->size)
1349 if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d)
1352 val = bfd_get_8 (abfd, contents + offset - 1);
1353 return (val & 0xc7) == 0x83;
1355 case R_386_TLS_DESC_CALL:
1356 /* Check transition from GDesc access model:
1357 call *x@tlsdesc(%rax)
1359 if (offset + 2 <= sec->size)
1361 /* Make sure that it's a call *x@tlsdesc(%rax). */
1362 static const unsigned char call[] = { 0xff, 0x10 };
1363 return memcmp (contents + offset, call, 2) == 0;
1373 /* Return TRUE if the TLS access transition is OK or no transition
1374 will be performed. Update R_TYPE if there is a transition. */
1377 elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd,
1378 asection *sec, bfd_byte *contents,
1379 Elf_Internal_Shdr *symtab_hdr,
1380 struct elf_link_hash_entry **sym_hashes,
1381 unsigned int *r_type, int tls_type,
1382 const Elf_Internal_Rela *rel,
1383 const Elf_Internal_Rela *relend,
1384 struct elf_link_hash_entry *h,
1385 unsigned long r_symndx)
1387 unsigned int from_type = *r_type;
1388 unsigned int to_type = from_type;
1389 bfd_boolean check = TRUE;
1391 /* Skip TLS transition for functions. */
1393 && (h->type == STT_FUNC
1394 || h->type == STT_GNU_IFUNC))
1400 case R_386_TLS_GOTDESC:
1401 case R_386_TLS_DESC_CALL:
1402 case R_386_TLS_IE_32:
1404 case R_386_TLS_GOTIE:
1405 if (bfd_link_executable (info))
1408 to_type = R_386_TLS_LE_32;
1409 else if (from_type != R_386_TLS_IE
1410 && from_type != R_386_TLS_GOTIE)
1411 to_type = R_386_TLS_IE_32;
1414 /* When we are called from elf_i386_relocate_section, CONTENTS
1415 isn't NULL and there may be additional transitions based on
1417 if (contents != NULL)
1419 unsigned int new_to_type = to_type;
1421 if (bfd_link_executable (info)
1424 && (tls_type & GOT_TLS_IE))
1425 new_to_type = R_386_TLS_LE_32;
1427 if (to_type == R_386_TLS_GD
1428 || to_type == R_386_TLS_GOTDESC
1429 || to_type == R_386_TLS_DESC_CALL)
1431 if (tls_type == GOT_TLS_IE_POS)
1432 new_to_type = R_386_TLS_GOTIE;
1433 else if (tls_type & GOT_TLS_IE)
1434 new_to_type = R_386_TLS_IE_32;
1437 /* We checked the transition before when we were called from
1438 elf_i386_check_relocs. We only want to check the new
1439 transition which hasn't been checked before. */
1440 check = new_to_type != to_type && from_type == to_type;
1441 to_type = new_to_type;
1447 if (bfd_link_executable (info))
1448 to_type = R_386_TLS_LE_32;
1455 /* Return TRUE if there is no transition. */
1456 if (from_type == to_type)
1459 /* Check if the transition can be performed. */
1461 && ! elf_i386_check_tls_transition (abfd, sec, contents,
1462 symtab_hdr, sym_hashes,
1463 from_type, rel, relend))
1465 reloc_howto_type *from, *to;
1468 from = elf_i386_rtype_to_howto (abfd, from_type);
1469 to = elf_i386_rtype_to_howto (abfd, to_type);
1472 name = h->root.root.string;
1475 struct elf_i386_link_hash_table *htab;
1477 htab = elf_i386_hash_table (info);
1482 Elf_Internal_Sym *isym;
1484 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1486 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
1490 (*_bfd_error_handler)
1491 (_("%B: TLS transition from %s to %s against `%s' at 0x%lx "
1492 "in section `%A' failed"),
1493 abfd, sec, from->name, to->name, name,
1494 (unsigned long) rel->r_offset);
1495 bfd_set_error (bfd_error_bad_value);
1503 /* Rename some of the generic section flags to better document how they
1505 #define need_convert_load sec_flg0
1507 /* Look through the relocs for a section during the first phase, and
1508 calculate needed space in the global offset table, procedure linkage
1509 table, and dynamic reloc sections. */
1512 elf_i386_check_relocs (bfd *abfd,
1513 struct bfd_link_info *info,
1515 const Elf_Internal_Rela *relocs)
1517 struct elf_i386_link_hash_table *htab;
1518 Elf_Internal_Shdr *symtab_hdr;
1519 struct elf_link_hash_entry **sym_hashes;
1520 const Elf_Internal_Rela *rel;
1521 const Elf_Internal_Rela *rel_end;
1523 bfd_boolean use_plt_got;
1525 if (bfd_link_relocatable (info))
1528 BFD_ASSERT (is_i386_elf (abfd));
1530 htab = elf_i386_hash_table (info);
1534 use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks
1535 && (get_elf_i386_backend_data (abfd)
1536 == &elf_i386_arch_bed));
1538 symtab_hdr = &elf_symtab_hdr (abfd);
1539 sym_hashes = elf_sym_hashes (abfd);
1543 rel_end = relocs + sec->reloc_count;
1544 for (rel = relocs; rel < rel_end; rel++)
1546 unsigned int r_type;
1547 unsigned long r_symndx;
1548 struct elf_link_hash_entry *h;
1549 struct elf_i386_link_hash_entry *eh;
1550 Elf_Internal_Sym *isym;
1552 bfd_boolean size_reloc;
1554 r_symndx = ELF32_R_SYM (rel->r_info);
1555 r_type = ELF32_R_TYPE (rel->r_info);
1557 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1559 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1565 if (r_symndx < symtab_hdr->sh_info)
1567 /* A local symbol. */
1568 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1573 /* Check relocation against local STT_GNU_IFUNC symbol. */
1574 if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1576 h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE);
1580 /* Fake a STT_GNU_IFUNC symbol. */
1581 h->type = STT_GNU_IFUNC;
1584 h->forced_local = 1;
1585 h->root.type = bfd_link_hash_defined;
1593 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1594 while (h->root.type == bfd_link_hash_indirect
1595 || h->root.type == bfd_link_hash_warning)
1596 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1599 eh = (struct elf_i386_link_hash_entry *) h;
1602 /* Create the ifunc sections for static executables. If we
1603 never see an indirect function symbol nor we are building
1604 a static executable, those sections will be empty and
1605 won't appear in output. */
1618 if (htab->elf.dynobj == NULL)
1619 htab->elf.dynobj = abfd;
1620 if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info))
1625 /* It is referenced by a non-shared object. */
1627 h->root.non_ir_ref = 1;
1629 if (h->type == STT_GNU_IFUNC)
1630 elf_tdata (info->output_bfd)->has_gnu_symbols
1631 |= elf_gnu_symbol_ifunc;
1634 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
1635 symtab_hdr, sym_hashes,
1636 &r_type, GOT_UNKNOWN,
1637 rel, rel_end, h, r_symndx))
1643 htab->tls_ldm_got.refcount += 1;
1647 /* This symbol requires a procedure linkage table entry. We
1648 actually build the entry in adjust_dynamic_symbol,
1649 because this might be a case of linking PIC code which is
1650 never referenced by a dynamic object, in which case we
1651 don't need to generate a procedure linkage table entry
1654 /* If this is a local symbol, we resolve it directly without
1655 creating a procedure linkage table entry. */
1659 eh->has_got_reloc = 1;
1661 h->plt.refcount += 1;
1668 case R_386_TLS_IE_32:
1670 case R_386_TLS_GOTIE:
1671 if (!bfd_link_executable (info))
1672 info->flags |= DF_STATIC_TLS;
1678 case R_386_TLS_GOTDESC:
1679 case R_386_TLS_DESC_CALL:
1680 /* This symbol requires a global offset table entry. */
1682 int tls_type, old_tls_type;
1689 tls_type = GOT_NORMAL;
1691 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
1692 case R_386_TLS_GOTDESC:
1693 case R_386_TLS_DESC_CALL:
1694 tls_type = GOT_TLS_GDESC; break;
1695 case R_386_TLS_IE_32:
1696 if (ELF32_R_TYPE (rel->r_info) == r_type)
1697 tls_type = GOT_TLS_IE_NEG;
1699 /* If this is a GD->IE transition, we may use either of
1700 R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */
1701 tls_type = GOT_TLS_IE;
1704 case R_386_TLS_GOTIE:
1705 tls_type = GOT_TLS_IE_POS; break;
1710 h->got.refcount += 1;
1711 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1715 bfd_signed_vma *local_got_refcounts;
1717 /* This is a global offset table entry for a local symbol. */
1718 local_got_refcounts = elf_local_got_refcounts (abfd);
1719 if (local_got_refcounts == NULL)
1723 size = symtab_hdr->sh_info;
1724 size *= (sizeof (bfd_signed_vma)
1725 + sizeof (bfd_vma) + sizeof(char));
1726 local_got_refcounts = (bfd_signed_vma *)
1727 bfd_zalloc (abfd, size);
1728 if (local_got_refcounts == NULL)
1730 elf_local_got_refcounts (abfd) = local_got_refcounts;
1731 elf_i386_local_tlsdesc_gotent (abfd)
1732 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
1733 elf_i386_local_got_tls_type (abfd)
1734 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
1736 local_got_refcounts[r_symndx] += 1;
1737 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1740 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1741 tls_type |= old_tls_type;
1742 /* If a TLS symbol is accessed using IE at least once,
1743 there is no point to use dynamic model for it. */
1744 else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
1745 && (! GOT_TLS_GD_ANY_P (old_tls_type)
1746 || (tls_type & GOT_TLS_IE) == 0))
1748 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
1749 tls_type = old_tls_type;
1750 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1751 && GOT_TLS_GD_ANY_P (tls_type))
1752 tls_type |= old_tls_type;
1756 name = h->root.root.string;
1758 name = bfd_elf_sym_name (abfd, symtab_hdr, isym,
1760 (*_bfd_error_handler)
1761 (_("%B: `%s' accessed both as normal and "
1762 "thread local symbol"),
1764 bfd_set_error (bfd_error_bad_value);
1769 if (old_tls_type != tls_type)
1772 elf_i386_hash_entry (h)->tls_type = tls_type;
1774 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1782 if (htab->elf.sgot == NULL)
1784 if (htab->elf.dynobj == NULL)
1785 htab->elf.dynobj = abfd;
1786 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
1789 if (r_type != R_386_TLS_IE)
1792 eh->has_got_reloc = 1;
1797 case R_386_TLS_LE_32:
1800 eh->has_got_reloc = 1;
1801 if (bfd_link_executable (info))
1803 info->flags |= DF_STATIC_TLS;
1808 if (eh != NULL && (sec->flags & SEC_CODE) != 0)
1809 eh->has_non_got_reloc = 1;
1811 if (h != NULL && bfd_link_executable (info))
1813 /* If this reloc is in a read-only section, we might
1814 need a copy reloc. We can't check reliably at this
1815 stage whether the section is read-only, as input
1816 sections have not yet been mapped to output sections.
1817 Tentatively set the flag for now, and correct in
1818 adjust_dynamic_symbol. */
1821 /* We may need a .plt entry if the function this reloc
1822 refers to is in a shared lib. */
1823 h->plt.refcount += 1;
1824 if (r_type == R_386_PC32)
1826 /* Since something like ".long foo - ." may be used
1827 as pointer, make sure that PLT is used if foo is
1828 a function defined in a shared library. */
1829 if ((sec->flags & SEC_CODE) == 0)
1830 h->pointer_equality_needed = 1;
1834 h->pointer_equality_needed = 1;
1835 /* R_386_32 can be resolved at run-time. */
1836 if (r_type == R_386_32
1837 && (sec->flags & SEC_READONLY) == 0)
1838 eh->func_pointer_refcount += 1;
1844 /* If we are creating a shared library, and this is a reloc
1845 against a global symbol, or a non PC relative reloc
1846 against a local symbol, then we need to copy the reloc
1847 into the shared library. However, if we are linking with
1848 -Bsymbolic, we do not need to copy a reloc against a
1849 global symbol which is defined in an object we are
1850 including in the link (i.e., DEF_REGULAR is set). At
1851 this point we have not seen all the input files, so it is
1852 possible that DEF_REGULAR is not set now but will be set
1853 later (it is never cleared). In case of a weak definition,
1854 DEF_REGULAR may be cleared later by a strong definition in
1855 a shared library. We account for that possibility below by
1856 storing information in the relocs_copied field of the hash
1857 table entry. A similar situation occurs when creating
1858 shared libraries and symbol visibility changes render the
1861 If on the other hand, we are creating an executable, we
1862 may need to keep relocations for symbols satisfied by a
1863 dynamic library if we manage to avoid copy relocs for the
1865 if ((bfd_link_pic (info)
1866 && (sec->flags & SEC_ALLOC) != 0
1867 && (r_type != R_386_PC32
1869 && (! SYMBOLIC_BIND (info, h)
1870 || h->root.type == bfd_link_hash_defweak
1871 || !h->def_regular))))
1872 || (ELIMINATE_COPY_RELOCS
1873 && !bfd_link_pic (info)
1874 && (sec->flags & SEC_ALLOC) != 0
1876 && (h->root.type == bfd_link_hash_defweak
1877 || !h->def_regular)))
1879 struct elf_dyn_relocs *p;
1880 struct elf_dyn_relocs **head;
1882 /* We must copy these reloc types into the output file.
1883 Create a reloc section in dynobj and make room for
1887 if (htab->elf.dynobj == NULL)
1888 htab->elf.dynobj = abfd;
1890 sreloc = _bfd_elf_make_dynamic_reloc_section
1891 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE);
1897 /* If this is a global symbol, we count the number of
1898 relocations we need for this symbol. */
1901 head = &eh->dyn_relocs;
1905 /* Track dynamic relocs needed for local syms too.
1906 We really need local syms available to do this
1911 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1916 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1920 vpp = &elf_section_data (s)->local_dynrel;
1921 head = (struct elf_dyn_relocs **)vpp;
1925 if (p == NULL || p->sec != sec)
1927 bfd_size_type amt = sizeof *p;
1928 p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj,
1940 /* Count size relocation as PC-relative relocation. */
1941 if (r_type == R_386_PC32 || size_reloc)
1946 /* This relocation describes the C++ object vtable hierarchy.
1947 Reconstruct it for later use during GC. */
1948 case R_386_GNU_VTINHERIT:
1949 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1953 /* This relocation describes which C++ vtable entries are actually
1954 used. Record for later use during GC. */
1955 case R_386_GNU_VTENTRY:
1956 BFD_ASSERT (h != NULL);
1958 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
1968 && h->plt.refcount > 0
1969 && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
1970 || h->got.refcount > 0)
1971 && htab->plt_got == NULL)
1973 /* Create the GOT procedure linkage table. */
1974 unsigned int plt_got_align;
1975 const struct elf_backend_data *bed;
1977 bed = get_elf_backend_data (info->output_bfd);
1978 BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8
1979 && (sizeof (elf_i386_got_plt_entry)
1980 == sizeof (elf_i386_pic_got_plt_entry)));
1983 if (htab->elf.dynobj == NULL)
1984 htab->elf.dynobj = abfd;
1986 = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
1988 (bed->dynamic_sec_flags
1993 if (htab->plt_got == NULL
1994 || !bfd_set_section_alignment (htab->elf.dynobj,
2000 if ((r_type == R_386_GOT32 || r_type == R_386_GOT32X)
2001 && (h == NULL || h->type != STT_GNU_IFUNC))
2002 sec->need_convert_load = 1;
2008 /* Return the section that should be marked against GC for a given
2012 elf_i386_gc_mark_hook (asection *sec,
2013 struct bfd_link_info *info,
2014 Elf_Internal_Rela *rel,
2015 struct elf_link_hash_entry *h,
2016 Elf_Internal_Sym *sym)
2019 switch (ELF32_R_TYPE (rel->r_info))
2021 case R_386_GNU_VTINHERIT:
2022 case R_386_GNU_VTENTRY:
2026 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2029 /* Update the got entry reference counts for the section being removed. */
2032 elf_i386_gc_sweep_hook (bfd *abfd,
2033 struct bfd_link_info *info,
2035 const Elf_Internal_Rela *relocs)
2037 struct elf_i386_link_hash_table *htab;
2038 Elf_Internal_Shdr *symtab_hdr;
2039 struct elf_link_hash_entry **sym_hashes;
2040 bfd_signed_vma *local_got_refcounts;
2041 const Elf_Internal_Rela *rel, *relend;
2043 if (bfd_link_relocatable (info))
2046 htab = elf_i386_hash_table (info);
2050 elf_section_data (sec)->local_dynrel = NULL;
2052 symtab_hdr = &elf_symtab_hdr (abfd);
2053 sym_hashes = elf_sym_hashes (abfd);
2054 local_got_refcounts = elf_local_got_refcounts (abfd);
2056 relend = relocs + sec->reloc_count;
2057 for (rel = relocs; rel < relend; rel++)
2059 unsigned long r_symndx;
2060 unsigned int r_type;
2061 struct elf_link_hash_entry *h = NULL;
2063 r_symndx = ELF32_R_SYM (rel->r_info);
2064 if (r_symndx >= symtab_hdr->sh_info)
2066 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2067 while (h->root.type == bfd_link_hash_indirect
2068 || h->root.type == bfd_link_hash_warning)
2069 h = (struct elf_link_hash_entry *) h->root.u.i.link;
2073 /* A local symbol. */
2074 Elf_Internal_Sym *isym;
2076 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2079 /* Check relocation against local STT_GNU_IFUNC symbol. */
2081 && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2083 h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE);
2091 struct elf_i386_link_hash_entry *eh;
2092 struct elf_dyn_relocs **pp;
2093 struct elf_dyn_relocs *p;
2095 eh = (struct elf_i386_link_hash_entry *) h;
2096 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
2099 /* Everything must go for SEC. */
2105 r_type = ELF32_R_TYPE (rel->r_info);
2106 if (! elf_i386_tls_transition (info, abfd, sec, NULL,
2107 symtab_hdr, sym_hashes,
2108 &r_type, GOT_UNKNOWN,
2109 rel, relend, h, r_symndx))
2115 if (htab->tls_ldm_got.refcount > 0)
2116 htab->tls_ldm_got.refcount -= 1;
2120 case R_386_TLS_GOTDESC:
2121 case R_386_TLS_DESC_CALL:
2122 case R_386_TLS_IE_32:
2124 case R_386_TLS_GOTIE:
2129 if (h->got.refcount > 0)
2130 h->got.refcount -= 1;
2131 if (h->type == STT_GNU_IFUNC)
2133 if (h->plt.refcount > 0)
2134 h->plt.refcount -= 1;
2137 else if (local_got_refcounts != NULL)
2139 if (local_got_refcounts[r_symndx] > 0)
2140 local_got_refcounts[r_symndx] -= 1;
2147 if (bfd_link_pic (info)
2148 && (h == NULL || h->type != STT_GNU_IFUNC))
2155 if (h->plt.refcount > 0)
2156 h->plt.refcount -= 1;
2157 if (r_type == R_386_32
2158 && (sec->flags & SEC_READONLY) == 0)
2160 struct elf_i386_link_hash_entry *eh
2161 = (struct elf_i386_link_hash_entry *) h;
2162 if (eh->func_pointer_refcount > 0)
2163 eh->func_pointer_refcount -= 1;
2169 if (h != NULL && h->type == STT_GNU_IFUNC)
2171 if (h->got.refcount > 0)
2172 h->got.refcount -= 1;
2173 if (h->plt.refcount > 0)
2174 h->plt.refcount -= 1;
2186 /* Remove undefined weak symbol from the dynamic symbol table if it
2187 is resolved to 0. */
2190 elf_i386_fixup_symbol (struct bfd_link_info *info,
2191 struct elf_link_hash_entry *h)
2193 if (h->dynindx != -1
2194 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info,
2195 elf_i386_hash_entry (h)))
2198 _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
2204 /* Adjust a symbol defined by a dynamic object and referenced by a
2205 regular object. The current definition is in some section of the
2206 dynamic object, but we're not including those sections. We have to
2207 change the definition to something the rest of the link can
2211 elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
2212 struct elf_link_hash_entry *h)
2214 struct elf_i386_link_hash_table *htab;
2216 struct elf_i386_link_hash_entry *eh;
2217 struct elf_dyn_relocs *p;
2219 /* STT_GNU_IFUNC symbol must go through PLT. */
2220 if (h->type == STT_GNU_IFUNC)
2222 /* All local STT_GNU_IFUNC references must be treate as local
2223 calls via local PLT. */
2225 && SYMBOL_CALLS_LOCAL (info, h))
2227 bfd_size_type pc_count = 0, count = 0;
2228 struct elf_dyn_relocs **pp;
2230 eh = (struct elf_i386_link_hash_entry *) h;
2231 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2233 pc_count += p->pc_count;
2234 p->count -= p->pc_count;
2243 if (pc_count || count)
2247 if (h->plt.refcount <= 0)
2248 h->plt.refcount = 1;
2250 h->plt.refcount += 1;
2254 if (h->plt.refcount <= 0)
2256 h->plt.offset = (bfd_vma) -1;
2262 /* If this is a function, put it in the procedure linkage table. We
2263 will fill in the contents of the procedure linkage table later,
2264 when we know the address of the .got section. */
2265 if (h->type == STT_FUNC
2268 if (h->plt.refcount <= 0
2269 || SYMBOL_CALLS_LOCAL (info, h)
2270 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2271 && h->root.type == bfd_link_hash_undefweak))
2273 /* This case can occur if we saw a PLT32 reloc in an input
2274 file, but the symbol was never referred to by a dynamic
2275 object, or if all references were garbage collected. In
2276 such a case, we don't actually need to build a procedure
2277 linkage table, and we can just do a PC32 reloc instead. */
2278 h->plt.offset = (bfd_vma) -1;
2285 /* It's possible that we incorrectly decided a .plt reloc was
2286 needed for an R_386_PC32 reloc to a non-function sym in
2287 check_relocs. We can't decide accurately between function and
2288 non-function syms in check-relocs; Objects loaded later in
2289 the link may change h->type. So fix it now. */
2290 h->plt.offset = (bfd_vma) -1;
2292 /* If this is a weak symbol, and there is a real definition, the
2293 processor independent code will have arranged for us to see the
2294 real definition first, and we can just use the same value. */
2295 if (h->u.weakdef != NULL)
2297 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2298 || h->u.weakdef->root.type == bfd_link_hash_defweak);
2299 h->root.u.def.section = h->u.weakdef->root.u.def.section;
2300 h->root.u.def.value = h->u.weakdef->root.u.def.value;
2301 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
2302 h->non_got_ref = h->u.weakdef->non_got_ref;
2306 /* This is a reference to a symbol defined by a dynamic object which
2307 is not a function. */
2309 /* If we are creating a shared library, we must presume that the
2310 only references to the symbol are via the global offset table.
2311 For such cases we need not do anything here; the relocations will
2312 be handled correctly by relocate_section. */
2313 if (!bfd_link_executable (info))
2316 /* If there are no references to this symbol that do not use the
2317 GOT nor R_386_GOTOFF relocation, we don't need to generate a copy
2319 eh = (struct elf_i386_link_hash_entry *) h;
2320 if (!h->non_got_ref && !eh->gotoff_ref)
2323 /* If -z nocopyreloc was given, we won't generate them either. */
2324 if (info->nocopyreloc)
2330 htab = elf_i386_hash_table (info);
2334 /* If there aren't any dynamic relocs in read-only sections nor
2335 R_386_GOTOFF relocation, then we can keep the dynamic relocs and
2336 avoid the copy reloc. This doesn't work on VxWorks, where we can
2337 not have dynamic relocations (other than copy and jump slot
2338 relocations) in an executable. */
2339 if (ELIMINATE_COPY_RELOCS
2341 && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2343 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2345 s = p->sec->output_section;
2346 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2357 /* We must allocate the symbol in our .dynbss section, which will
2358 become part of the .bss section of the executable. There will be
2359 an entry for this symbol in the .dynsym section. The dynamic
2360 object will contain position independent code, so all references
2361 from the dynamic object to this symbol will go through the global
2362 offset table. The dynamic linker will use the .dynsym entry to
2363 determine the address it must put in the global offset table, so
2364 both the dynamic object and the regular object will refer to the
2365 same memory location for the variable. */
2367 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
2368 copy the initial value out of the dynamic object and into the
2369 runtime process image. */
2370 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2372 htab->srelbss->size += sizeof (Elf32_External_Rel);
2378 return _bfd_elf_adjust_dynamic_copy (info, h, s);
2381 /* Allocate space in .plt, .got and associated reloc sections for
2385 elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2387 struct bfd_link_info *info;
2388 struct elf_i386_link_hash_table *htab;
2389 struct elf_i386_link_hash_entry *eh;
2390 struct elf_dyn_relocs *p;
2391 unsigned plt_entry_size;
2392 bfd_boolean resolved_to_zero;
2394 if (h->root.type == bfd_link_hash_indirect)
2397 eh = (struct elf_i386_link_hash_entry *) h;
2399 info = (struct bfd_link_info *) inf;
2400 htab = elf_i386_hash_table (info);
2404 plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd);
2406 resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
2408 /* Clear the reference count of function pointer relocations if
2409 symbol isn't a normal function. */
2410 if (h->type != STT_FUNC)
2411 eh->func_pointer_refcount = 0;
2413 /* We can't use the GOT PLT if pointer equality is needed since
2414 finish_dynamic_symbol won't clear symbol value and the dynamic
2415 linker won't update the GOT slot. We will get into an infinite
2416 loop at run-time. */
2417 if (htab->plt_got != NULL
2418 && h->type != STT_GNU_IFUNC
2419 && !h->pointer_equality_needed
2420 && h->plt.refcount > 0
2421 && h->got.refcount > 0)
2423 /* Don't use the regular PLT if there are both GOT and GOTPLT
2425 h->plt.offset = (bfd_vma) -1;
2427 /* Use the GOT PLT. */
2428 eh->plt_got.refcount = 1;
2431 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
2432 here if it is defined and referenced in a non-shared object. */
2433 if (h->type == STT_GNU_IFUNC
2435 return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs,
2438 /* Don't create the PLT entry if there are only function pointer
2439 relocations which can be resolved at run-time. */
2440 else if (htab->elf.dynamic_sections_created
2441 && (h->plt.refcount > eh->func_pointer_refcount
2442 || eh->plt_got.refcount > 0))
2444 bfd_boolean use_plt_got;
2446 /* Clear the reference count of function pointer relocations
2448 eh->func_pointer_refcount = 0;
2450 if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed)
2452 /* Don't use the regular PLT for DF_BIND_NOW. */
2453 h->plt.offset = (bfd_vma) -1;
2455 /* Use the GOT PLT. */
2456 h->got.refcount = 1;
2457 eh->plt_got.refcount = 1;
2460 use_plt_got = eh->plt_got.refcount > 0;
2462 /* Make sure this symbol is output as a dynamic symbol.
2463 Undefined weak syms won't yet be marked as dynamic. */
2464 if (h->dynindx == -1
2466 && !resolved_to_zero)
2468 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2472 if (bfd_link_pic (info)
2473 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
2475 asection *s = htab->elf.splt;
2476 asection *got_s = htab->plt_got;
2478 /* If this is the first .plt entry, make room for the special
2479 first entry. The .plt section is used by prelink to undo
2480 prelinking for dynamic relocations. */
2482 s->size = plt_entry_size;
2485 eh->plt_got.offset = got_s->size;
2487 h->plt.offset = s->size;
2489 /* If this symbol is not defined in a regular file, and we are
2490 not generating a shared library, then set the symbol to this
2491 location in the .plt. This is required to make function
2492 pointers compare as equal between the normal executable and
2493 the shared library. */
2494 if (! bfd_link_pic (info)
2499 /* We need to make a call to the entry of the GOT PLT
2500 instead of regular PLT entry. */
2501 h->root.u.def.section = got_s;
2502 h->root.u.def.value = eh->plt_got.offset;
2506 h->root.u.def.section = s;
2507 h->root.u.def.value = h->plt.offset;
2511 /* Make room for this entry. */
2513 got_s->size += sizeof (elf_i386_got_plt_entry);
2516 s->size += plt_entry_size;
2518 /* We also need to make an entry in the .got.plt section,
2519 which will be placed in the .got section by the linker
2521 htab->elf.sgotplt->size += 4;
2523 /* There should be no PLT relocation against resolved
2524 undefined weak symbol in executable. */
2525 if (!resolved_to_zero)
2527 /* We also need to make an entry in the .rel.plt
2529 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2530 htab->elf.srelplt->reloc_count++;
2534 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks
2535 && !bfd_link_pic (info))
2537 /* VxWorks has a second set of relocations for each PLT entry
2538 in executables. They go in a separate relocation section,
2539 which is processed by the kernel loader. */
2541 /* There are two relocations for the initial PLT entry: an
2542 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
2543 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
2545 if (h->plt.offset == plt_entry_size)
2546 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2548 /* There are two extra relocations for each subsequent PLT entry:
2549 an R_386_32 relocation for the GOT entry, and an R_386_32
2550 relocation for the PLT entry. */
2552 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
2557 eh->plt_got.offset = (bfd_vma) -1;
2558 h->plt.offset = (bfd_vma) -1;
2564 eh->plt_got.offset = (bfd_vma) -1;
2565 h->plt.offset = (bfd_vma) -1;
2569 eh->tlsdesc_got = (bfd_vma) -1;
2571 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
2572 make it a R_386_TLS_LE_32 requiring no TLS entry. */
2573 if (h->got.refcount > 0
2574 && bfd_link_executable (info)
2576 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
2577 h->got.offset = (bfd_vma) -1;
2578 else if (h->got.refcount > 0)
2582 int tls_type = elf_i386_hash_entry(h)->tls_type;
2584 /* Make sure this symbol is output as a dynamic symbol.
2585 Undefined weak syms won't yet be marked as dynamic. */
2586 if (h->dynindx == -1
2588 && !resolved_to_zero)
2590 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2595 if (GOT_TLS_GDESC_P (tls_type))
2597 eh->tlsdesc_got = htab->elf.sgotplt->size
2598 - elf_i386_compute_jump_table_size (htab);
2599 htab->elf.sgotplt->size += 8;
2600 h->got.offset = (bfd_vma) -2;
2602 if (! GOT_TLS_GDESC_P (tls_type)
2603 || GOT_TLS_GD_P (tls_type))
2605 h->got.offset = s->size;
2607 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
2608 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
2611 dyn = htab->elf.dynamic_sections_created;
2612 /* R_386_TLS_IE_32 needs one dynamic relocation,
2613 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
2614 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
2615 need two), R_386_TLS_GD needs one if local symbol and two if
2616 global. No dynamic relocation against resolved undefined weak
2617 symbol in executable. */
2618 if (tls_type == GOT_TLS_IE_BOTH)
2619 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2620 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
2621 || (tls_type & GOT_TLS_IE))
2622 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2623 else if (GOT_TLS_GD_P (tls_type))
2624 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel);
2625 else if (! GOT_TLS_GDESC_P (tls_type)
2626 && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2627 && !resolved_to_zero)
2628 || h->root.type != bfd_link_hash_undefweak)
2629 && (bfd_link_pic (info)
2630 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
2631 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
2632 if (GOT_TLS_GDESC_P (tls_type))
2633 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
2636 h->got.offset = (bfd_vma) -1;
2638 if (eh->dyn_relocs == NULL)
2641 /* In the shared -Bsymbolic case, discard space allocated for
2642 dynamic pc-relative relocs against symbols which turn out to be
2643 defined in regular objects. For the normal shared case, discard
2644 space for pc-relative relocs that have become local due to symbol
2645 visibility changes. */
2647 if (bfd_link_pic (info))
2649 /* The only reloc that uses pc_count is R_386_PC32, which will
2650 appear on a call or on something like ".long foo - .". We
2651 want calls to protected symbols to resolve directly to the
2652 function rather than going via the plt. If people want
2653 function pointer comparisons to work as expected then they
2654 should avoid writing assembly like ".long foo - .". */
2655 if (SYMBOL_CALLS_LOCAL (info, h))
2657 struct elf_dyn_relocs **pp;
2659 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2661 p->count -= p->pc_count;
2670 if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks)
2672 struct elf_dyn_relocs **pp;
2673 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2675 if (strcmp (p->sec->output_section->name, ".tls_vars") == 0)
2682 /* Also discard relocs on undefined weak syms with non-default
2683 visibility or in PIE. */
2684 if (eh->dyn_relocs != NULL
2685 && h->root.type == bfd_link_hash_undefweak)
2687 /* Undefined weak symbol is never bound locally in shared
2689 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
2690 || resolved_to_zero)
2694 /* Keep dynamic non-GOT/non-PLT relocation so that we
2695 can branch to 0 without PLT. */
2696 struct elf_dyn_relocs **pp;
2698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
2699 if (p->pc_count == 0)
2703 /* Remove non-R_386_PC32 relocation. */
2704 p->count = p->pc_count;
2708 if (eh->dyn_relocs != NULL)
2710 /* Make sure undefined weak symbols are output
2711 as dynamic symbols in PIEs for dynamic non-GOT
2712 non-PLT reloations. */
2713 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2718 eh->dyn_relocs = NULL;
2720 else if (h->dynindx == -1
2721 && !h->forced_local)
2723 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2728 else if (ELIMINATE_COPY_RELOCS)
2730 /* For the non-shared case, discard space for relocs against
2731 symbols which turn out to need copy relocs or are not
2732 dynamic. Keep dynamic relocations for run-time function
2733 pointer initialization. */
2735 if ((!h->non_got_ref
2736 || eh->func_pointer_refcount > 0
2737 || (h->root.type == bfd_link_hash_undefweak
2738 && !resolved_to_zero))
2741 || (htab->elf.dynamic_sections_created
2742 && (h->root.type == bfd_link_hash_undefweak
2743 || h->root.type == bfd_link_hash_undefined))))
2745 /* Make sure this symbol is output as a dynamic symbol.
2746 Undefined weak syms won't yet be marked as dynamic. */
2747 if (h->dynindx == -1
2749 && !resolved_to_zero)
2751 if (! bfd_elf_link_record_dynamic_symbol (info, h))
2755 /* If that succeeded, we know we'll be keeping all the
2757 if (h->dynindx != -1)
2761 eh->dyn_relocs = NULL;
2762 eh->func_pointer_refcount = 0;
2767 /* Finally, allocate space. */
2768 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2772 sreloc = elf_section_data (p->sec)->sreloc;
2774 BFD_ASSERT (sreloc != NULL);
2775 sreloc->size += p->count * sizeof (Elf32_External_Rel);
2781 /* Allocate space in .plt, .got and associated reloc sections for
2782 local dynamic relocs. */
2785 elf_i386_allocate_local_dynrelocs (void **slot, void *inf)
2787 struct elf_link_hash_entry *h
2788 = (struct elf_link_hash_entry *) *slot;
2790 if (h->type != STT_GNU_IFUNC
2794 || h->root.type != bfd_link_hash_defined)
2797 return elf_i386_allocate_dynrelocs (h, inf);
2800 /* Find any dynamic relocs that apply to read-only sections. */
2803 elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
2805 struct elf_i386_link_hash_entry *eh;
2806 struct elf_dyn_relocs *p;
2808 /* Skip local IFUNC symbols. */
2809 if (h->forced_local && h->type == STT_GNU_IFUNC)
2812 eh = (struct elf_i386_link_hash_entry *) h;
2813 for (p = eh->dyn_relocs; p != NULL; p = p->next)
2815 asection *s = p->sec->output_section;
2817 if (s != NULL && (s->flags & SEC_READONLY) != 0)
2819 struct bfd_link_info *info = (struct bfd_link_info *) inf;
2821 info->flags |= DF_TEXTREL;
2823 if ((info->warn_shared_textrel && bfd_link_pic (info))
2824 || info->error_textrel)
2825 info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"),
2826 p->sec->owner, h->root.root.string,
2829 /* Not an error, just cut short the traversal. */
2836 /* With the local symbol, foo, we convert
2837 mov foo@GOT[(%reg1)], %reg2
2839 lea foo[@GOTOFF(%reg1)], %reg2
2841 call/jmp *foo@GOT[(%reg)]
2843 nop call foo/jmp foo nop
2844 When PIC is false, convert
2845 test %reg1, foo@GOT[(%reg2)]
2849 binop foo@GOT[(%reg1)], %reg2
2852 where binop is one of adc, add, and, cmp, or, sbb, sub, xor
2856 elf_i386_convert_load (bfd *abfd, asection *sec,
2857 struct bfd_link_info *link_info)
2859 Elf_Internal_Shdr *symtab_hdr;
2860 Elf_Internal_Rela *internal_relocs;
2861 Elf_Internal_Rela *irel, *irelend;
2863 struct elf_i386_link_hash_table *htab;
2864 bfd_boolean changed_contents;
2865 bfd_boolean changed_relocs;
2867 bfd_signed_vma *local_got_refcounts;
2869 /* Don't even try to convert non-ELF outputs. */
2870 if (!is_elf_hash_table (link_info->hash))
2873 /* Nothing to do if there is no need or no output. */
2874 if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC)
2875 || sec->need_convert_load == 0
2876 || bfd_is_abs_section (sec->output_section))
2879 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2881 /* Load the relocations for this section. */
2882 internal_relocs = (_bfd_elf_link_read_relocs
2883 (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
2884 link_info->keep_memory));
2885 if (internal_relocs == NULL)
2888 htab = elf_i386_hash_table (link_info);
2889 changed_contents = FALSE;
2890 changed_relocs = FALSE;
2891 local_got_refcounts = elf_local_got_refcounts (abfd);
2893 is_pic = bfd_link_pic (link_info);
2895 /* Get the section contents. */
2896 if (elf_section_data (sec)->this_hdr.contents != NULL)
2897 contents = elf_section_data (sec)->this_hdr.contents;
2900 if (!bfd_malloc_and_get_section (abfd, sec, &contents))
2904 irelend = internal_relocs + sec->reloc_count;
2905 for (irel = internal_relocs; irel < irelend; irel++)
2907 unsigned int r_type = ELF32_R_TYPE (irel->r_info);
2908 unsigned int r_symndx = ELF32_R_SYM (irel->r_info);
2910 struct elf_link_hash_entry *h;
2911 unsigned int opcode;
2914 bfd_boolean baseless;
2915 Elf_Internal_Sym *isym;
2916 unsigned int addend;
2919 bfd_boolean to_reloc_32;
2921 if (r_type != R_386_GOT32 && r_type != R_386_GOT32X)
2924 roff = irel->r_offset;
2928 /* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */
2929 addend = bfd_get_32 (abfd, contents + roff);
2933 modrm = bfd_get_8 (abfd, contents + roff - 1);
2934 baseless = (modrm & 0xc7) == 0x5;
2936 if (r_type == R_386_GOT32X && baseless && is_pic)
2938 /* For PIC, disallow R_386_GOT32X without a base register
2939 since we don't know what the GOT base is. Allow
2940 R_386_GOT32 for existing object files. */
2943 if (r_symndx < symtab_hdr->sh_info)
2945 isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd,
2947 name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL);
2951 indx = r_symndx - symtab_hdr->sh_info;
2952 h = elf_sym_hashes (abfd)[indx];
2953 BFD_ASSERT (h != NULL);
2954 name = h->root.root.string;
2957 (*_bfd_error_handler)
2958 (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"),
2963 opcode = bfd_get_8 (abfd, contents + roff - 2);
2965 /* Convert mov to lea since it has been done for a while. */
2968 /* Only convert R_386_GOT32X relocation for call, jmp or
2969 one of adc, add, and, cmp, or, sbb, sub, test, xor
2971 if (r_type != R_386_GOT32X)
2975 /* Convert to R_386_32 if PIC is false or there is no base
2977 to_reloc_32 = !is_pic || baseless;
2979 /* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol
2980 referred to by the reloc. */
2981 if (r_symndx < symtab_hdr->sh_info)
2983 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2986 /* STT_GNU_IFUNC must keep GOT32 relocations. */
2987 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
2991 if (opcode == 0x0ff)
2992 /* Convert "call/jmp *foo@GOT[(%reg)]". */
2993 goto convert_branch;
2995 /* Convert "mov foo@GOT[(%reg1)], %reg2",
2996 "test %reg1, foo@GOT(%reg2)" and
2997 "binop foo@GOT[(%reg1)], %reg2". */
3001 indx = r_symndx - symtab_hdr->sh_info;
3002 h = elf_sym_hashes (abfd)[indx];
3003 BFD_ASSERT (h != NULL);
3005 while (h->root.type == bfd_link_hash_indirect
3006 || h->root.type == bfd_link_hash_warning)
3007 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3009 /* STT_GNU_IFUNC must keep GOT32 relocations. */
3010 if (h->type == STT_GNU_IFUNC)
3013 /* Undefined weak symbol is only bound locally in executable
3014 and its reference is resolved as 0. */
3015 if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info,
3016 elf_i386_hash_entry (h)))
3020 /* No direct branch to 0 for PIC. */
3024 goto convert_branch;
3028 /* We can convert load of address 0 to R_386_32. */
3036 /* We have "call/jmp *foo@GOT[(%reg)]". */
3037 if ((h->root.type == bfd_link_hash_defined
3038 || h->root.type == bfd_link_hash_defweak)
3039 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3041 /* The function is locally defined. */
3043 /* Convert R_386_GOT32X to R_386_PC32. */
3044 if (modrm == 0x15 || (modrm & 0xf8) == 0x90)
3046 /* Convert to "nop call foo". ADDR_PREFIX_OPCODE
3049 nop = link_info->call_nop_byte;
3050 if (link_info->call_nop_as_suffix)
3052 nop_offset = roff + 3;
3053 irel->r_offset -= 1;
3056 nop_offset = roff - 2;
3060 /* Convert to "jmp foo nop". */
3063 nop_offset = roff + 3;
3064 irel->r_offset -= 1;
3067 bfd_put_8 (abfd, nop, contents + nop_offset);
3068 bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1);
3069 /* When converting to PC-relative relocation, we
3070 need to adjust addend by -4. */
3071 bfd_put_32 (abfd, -4, contents + irel->r_offset);
3072 irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32);
3076 if (h->got.refcount > 0)
3077 h->got.refcount -= 1;
3081 if (local_got_refcounts != NULL
3082 && local_got_refcounts[r_symndx] > 0)
3083 local_got_refcounts[r_symndx] -= 1;
3086 changed_contents = TRUE;
3087 changed_relocs = TRUE;
3092 /* We have "mov foo@GOT[(%re1g)], %reg2",
3093 "test %reg1, foo@GOT(%reg2)" and
3094 "binop foo@GOT[(%reg1)], %reg2".
3096 Avoid optimizing _DYNAMIC since ld.so may use its
3097 link-time address. */
3098 if (h == htab->elf.hdynamic)
3101 /* def_regular is set by an assignment in a linker script in
3102 bfd_elf_record_link_assignment. */
3104 || h->root.type == bfd_link_hash_defined
3105 || h->root.type == bfd_link_hash_defweak)
3106 && SYMBOL_REFERENCES_LOCAL (link_info, h))
3113 /* Convert "mov foo@GOT[(%reg1)], %reg2" to
3114 "mov $foo, %reg2" with R_386_32. */
3116 modrm = 0xc0 | (modrm & 0x38) >> 3;
3117 bfd_put_8 (abfd, modrm, contents + roff - 1);
3122 /* Convert "mov foo@GOT(%reg1), %reg2" to
3123 "lea foo@GOTOFF(%reg1), %reg2". */
3124 r_type = R_386_GOTOFF;
3130 /* Only R_386_32 is supported. */
3136 /* Convert "test %reg1, foo@GOT(%reg2)" to
3137 "test $foo, %reg1". */
3138 modrm = 0xc0 | (modrm & 0x38) >> 3;
3143 /* Convert "binop foo@GOT(%reg1), %reg2" to
3144 "binop $foo, %reg2". */
3146 | (modrm & 0x38) >> 3
3150 bfd_put_8 (abfd, modrm, contents + roff - 1);
3154 bfd_put_8 (abfd, opcode, contents + roff - 2);
3155 irel->r_info = ELF32_R_INFO (r_symndx, r_type);
3159 if (h->got.refcount > 0)
3160 h->got.refcount -= 1;
3164 if (local_got_refcounts != NULL
3165 && local_got_refcounts[r_symndx] > 0)
3166 local_got_refcounts[r_symndx] -= 1;
3169 changed_contents = TRUE;
3170 changed_relocs = TRUE;
3175 if (contents != NULL
3176 && elf_section_data (sec)->this_hdr.contents != contents)
3178 if (!changed_contents && !link_info->keep_memory)
3182 /* Cache the section contents for elf_link_input_bfd. */
3183 elf_section_data (sec)->this_hdr.contents = contents;
3187 if (elf_section_data (sec)->relocs != internal_relocs)
3189 if (!changed_relocs)
3190 free (internal_relocs);
3192 elf_section_data (sec)->relocs = internal_relocs;
3198 if (contents != NULL
3199 && elf_section_data (sec)->this_hdr.contents != contents)
3201 if (internal_relocs != NULL
3202 && elf_section_data (sec)->relocs != internal_relocs)
3203 free (internal_relocs);
3207 /* Set the sizes of the dynamic sections. */
3210 elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info)
3212 struct elf_i386_link_hash_table *htab;
3218 htab = elf_i386_hash_table (info);
3221 dynobj = htab->elf.dynobj;
3225 if (htab->elf.dynamic_sections_created)
3227 /* Set the contents of the .interp section to the interpreter. */
3228 if (bfd_link_executable (info) && !info->nointerp)
3230 s = bfd_get_linker_section (dynobj, ".interp");
3233 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3234 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3239 /* Set up .got offsets for local syms, and space for local dynamic
3241 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3243 bfd_signed_vma *local_got;
3244 bfd_signed_vma *end_local_got;
3245 char *local_tls_type;
3246 bfd_vma *local_tlsdesc_gotent;
3247 bfd_size_type locsymcount;
3248 Elf_Internal_Shdr *symtab_hdr;
3251 if (! is_i386_elf (ibfd))
3254 for (s = ibfd->sections; s != NULL; s = s->next)
3256 struct elf_dyn_relocs *p;
3258 if (!elf_i386_convert_load (ibfd, s, info))
3261 for (p = ((struct elf_dyn_relocs *)
3262 elf_section_data (s)->local_dynrel);
3266 if (!bfd_is_abs_section (p->sec)
3267 && bfd_is_abs_section (p->sec->output_section))
3269 /* Input section has been discarded, either because
3270 it is a copy of a linkonce section or due to
3271 linker script /DISCARD/, so we'll be discarding
3274 else if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3275 && strcmp (p->sec->output_section->name,
3278 /* Relocations in vxworks .tls_vars sections are
3279 handled specially by the loader. */
3281 else if (p->count != 0)
3283 srel = elf_section_data (p->sec)->sreloc;
3284 srel->size += p->count * sizeof (Elf32_External_Rel);
3285 if ((p->sec->output_section->flags & SEC_READONLY) != 0
3286 && (info->flags & DF_TEXTREL) == 0)
3288 info->flags |= DF_TEXTREL;
3289 if ((info->warn_shared_textrel && bfd_link_pic (info))
3290 || info->error_textrel)
3291 info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"),
3292 p->sec->owner, p->sec);
3298 local_got = elf_local_got_refcounts (ibfd);
3302 symtab_hdr = &elf_symtab_hdr (ibfd);
3303 locsymcount = symtab_hdr->sh_info;
3304 end_local_got = local_got + locsymcount;
3305 local_tls_type = elf_i386_local_got_tls_type (ibfd);
3306 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
3308 srel = htab->elf.srelgot;
3309 for (; local_got < end_local_got;
3310 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
3312 *local_tlsdesc_gotent = (bfd_vma) -1;
3315 if (GOT_TLS_GDESC_P (*local_tls_type))
3317 *local_tlsdesc_gotent = htab->elf.sgotplt->size
3318 - elf_i386_compute_jump_table_size (htab);
3319 htab->elf.sgotplt->size += 8;
3320 *local_got = (bfd_vma) -2;
3322 if (! GOT_TLS_GDESC_P (*local_tls_type)
3323 || GOT_TLS_GD_P (*local_tls_type))
3325 *local_got = s->size;
3327 if (GOT_TLS_GD_P (*local_tls_type)
3328 || *local_tls_type == GOT_TLS_IE_BOTH)
3331 if (bfd_link_pic (info)
3332 || GOT_TLS_GD_ANY_P (*local_tls_type)
3333 || (*local_tls_type & GOT_TLS_IE))
3335 if (*local_tls_type == GOT_TLS_IE_BOTH)
3336 srel->size += 2 * sizeof (Elf32_External_Rel);
3337 else if (GOT_TLS_GD_P (*local_tls_type)
3338 || ! GOT_TLS_GDESC_P (*local_tls_type))
3339 srel->size += sizeof (Elf32_External_Rel);
3340 if (GOT_TLS_GDESC_P (*local_tls_type))
3341 htab->elf.srelplt->size += sizeof (Elf32_External_Rel);
3345 *local_got = (bfd_vma) -1;
3349 if (htab->tls_ldm_got.refcount > 0)
3351 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
3353 htab->tls_ldm_got.offset = htab->elf.sgot->size;
3354 htab->elf.sgot->size += 8;
3355 htab->elf.srelgot->size += sizeof (Elf32_External_Rel);
3358 htab->tls_ldm_got.offset = -1;
3360 /* Allocate global sym .plt and .got entries, and space for global
3361 sym dynamic relocs. */
3362 elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info);
3364 /* Allocate .plt and .got entries, and space for local symbols. */
3365 htab_traverse (htab->loc_hash_table,
3366 elf_i386_allocate_local_dynrelocs,
3369 /* For every jump slot reserved in the sgotplt, reloc_count is
3370 incremented. However, when we reserve space for TLS descriptors,
3371 it's not incremented, so in order to compute the space reserved
3372 for them, it suffices to multiply the reloc count by the jump
3375 PR ld/13302: We start next_irelative_index at the end of .rela.plt
3376 so that R_386_IRELATIVE entries come last. */
3377 if (htab->elf.srelplt)
3379 htab->next_tls_desc_index = htab->elf.srelplt->reloc_count;
3380 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
3381 htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1;
3383 else if (htab->elf.irelplt)
3384 htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1;
3387 if (htab->elf.sgotplt)
3389 /* Don't allocate .got.plt section if there are no GOT nor PLT
3390 entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */
3391 if ((htab->elf.hgot == NULL
3392 || !htab->elf.hgot->ref_regular_nonweak)
3393 && (htab->elf.sgotplt->size
3394 == get_elf_backend_data (output_bfd)->got_header_size)
3395 && (htab->elf.splt == NULL
3396 || htab->elf.splt->size == 0)
3397 && (htab->elf.sgot == NULL
3398 || htab->elf.sgot->size == 0)
3399 && (htab->elf.iplt == NULL
3400 || htab->elf.iplt->size == 0)
3401 && (htab->elf.igotplt == NULL
3402 || htab->elf.igotplt->size == 0))
3403 htab->elf.sgotplt->size = 0;
3407 if (htab->plt_eh_frame != NULL
3408 && htab->elf.splt != NULL
3409 && htab->elf.splt->size != 0
3410 && !bfd_is_abs_section (htab->elf.splt->output_section)
3411 && _bfd_elf_eh_frame_present (info))
3412 htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt);
3414 /* We now have determined the sizes of the various dynamic sections.
3415 Allocate memory for them. */
3417 for (s = dynobj->sections; s != NULL; s = s->next)
3419 bfd_boolean strip_section = TRUE;
3421 if ((s->flags & SEC_LINKER_CREATED) == 0)
3424 if (s == htab->elf.splt
3425 || s == htab->elf.sgot)
3427 /* Strip this section if we don't need it; see the
3429 /* We'd like to strip these sections if they aren't needed, but if
3430 we've exported dynamic symbols from them we must leave them.
3431 It's too late to tell BFD to get rid of the symbols. */
3433 if (htab->elf.hplt != NULL)
3434 strip_section = FALSE;
3436 else if (s == htab->elf.sgotplt
3437 || s == htab->elf.iplt
3438 || s == htab->elf.igotplt
3439 || s == htab->plt_got
3440 || s == htab->plt_eh_frame
3441 || s == htab->sdynbss)
3443 /* Strip these too. */
3445 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel"))
3448 && s != htab->elf.srelplt
3449 && s != htab->srelplt2)
3452 /* We use the reloc_count field as a counter if we need
3453 to copy relocs into the output file. */
3458 /* It's not one of our sections, so don't allocate space. */
3464 /* If we don't need this section, strip it from the
3465 output file. This is mostly to handle .rel.bss and
3466 .rel.plt. We must create both sections in
3467 create_dynamic_sections, because they must be created
3468 before the linker maps input sections to output
3469 sections. The linker does that before
3470 adjust_dynamic_symbol is called, and it is that
3471 function which decides whether anything needs to go
3472 into these sections. */
3474 s->flags |= SEC_EXCLUDE;
3478 if ((s->flags & SEC_HAS_CONTENTS) == 0)
3481 /* Allocate memory for the section contents. We use bfd_zalloc
3482 here in case unused entries are not reclaimed before the
3483 section's contents are written out. This should not happen,
3484 but this way if it does, we get a R_386_NONE reloc instead
3486 s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size);
3487 if (s->contents == NULL)
3491 if (htab->plt_eh_frame != NULL
3492 && htab->plt_eh_frame->contents != NULL)
3494 memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt,
3495 sizeof (elf_i386_eh_frame_plt));
3496 bfd_put_32 (dynobj, htab->elf.splt->size,
3497 htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET);
3500 if (htab->elf.dynamic_sections_created)
3502 /* Add some entries to the .dynamic section. We fill in the
3503 values later, in elf_i386_finish_dynamic_sections, but we
3504 must add the entries now so that we get the correct size for
3505 the .dynamic section. The DT_DEBUG entry is filled in by the
3506 dynamic linker and used by the debugger. */
3507 #define add_dynamic_entry(TAG, VAL) \
3508 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3510 if (bfd_link_executable (info))
3512 if (!add_dynamic_entry (DT_DEBUG, 0))
3516 if (htab->elf.splt->size != 0)
3518 /* DT_PLTGOT is used by prelink even if there is no PLT
3520 if (!add_dynamic_entry (DT_PLTGOT, 0))
3523 if (htab->elf.srelplt->size != 0)
3525 if (!add_dynamic_entry (DT_PLTRELSZ, 0)
3526 || !add_dynamic_entry (DT_PLTREL, DT_REL)
3527 || !add_dynamic_entry (DT_JMPREL, 0))
3534 if (!add_dynamic_entry (DT_REL, 0)
3535 || !add_dynamic_entry (DT_RELSZ, 0)
3536 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
3539 /* If any dynamic relocs apply to a read-only section,
3540 then we need a DT_TEXTREL entry. */
3541 if ((info->flags & DF_TEXTREL) == 0)
3542 elf_link_hash_traverse (&htab->elf,
3543 elf_i386_readonly_dynrelocs, info);
3545 if ((info->flags & DF_TEXTREL) != 0)
3547 if ((elf_tdata (output_bfd)->has_gnu_symbols
3548 & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc)
3550 info->callbacks->einfo
3551 (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n"));
3552 bfd_set_error (bfd_error_bad_value);
3556 if (!add_dynamic_entry (DT_TEXTREL, 0))
3560 if (get_elf_i386_backend_data (output_bfd)->is_vxworks
3561 && !elf_vxworks_add_dynamic_entries (output_bfd, info))
3564 #undef add_dynamic_entry
3570 elf_i386_always_size_sections (bfd *output_bfd,
3571 struct bfd_link_info *info)
3573 asection *tls_sec = elf_hash_table (info)->tls_sec;
3577 struct elf_link_hash_entry *tlsbase;
3579 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
3580 "_TLS_MODULE_BASE_",
3581 FALSE, FALSE, FALSE);
3583 if (tlsbase && tlsbase->type == STT_TLS)
3585 struct elf_i386_link_hash_table *htab;
3586 struct bfd_link_hash_entry *bh = NULL;
3587 const struct elf_backend_data *bed
3588 = get_elf_backend_data (output_bfd);
3590 htab = elf_i386_hash_table (info);
3594 if (!(_bfd_generic_link_add_one_symbol
3595 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
3596 tls_sec, 0, NULL, FALSE,
3597 bed->collect, &bh)))
3600 htab->tls_module_base = bh;
3602 tlsbase = (struct elf_link_hash_entry *)bh;
3603 tlsbase->def_regular = 1;
3604 tlsbase->other = STV_HIDDEN;
3605 tlsbase->root.linker_def = 1;
3606 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
3613 /* Set the correct type for an x86 ELF section. We do this by the
3614 section name, which is a hack, but ought to work. */
3617 elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
3618 Elf_Internal_Shdr *hdr,
3623 name = bfd_get_section_name (abfd, sec);
3625 /* This is an ugly, but unfortunately necessary hack that is
3626 needed when producing EFI binaries on x86. It tells
3627 elf.c:elf_fake_sections() not to consider ".reloc" as a section
3628 containing ELF relocation info. We need this hack in order to
3629 be able to generate ELF binaries that can be translated into
3630 EFI applications (which are essentially COFF objects). Those
3631 files contain a COFF ".reloc" section inside an ELFNN object,
3632 which would normally cause BFD to segfault because it would
3633 attempt to interpret this section as containing relocation
3634 entries for section "oc". With this hack enabled, ".reloc"
3635 will be treated as a normal data section, which will avoid the
3636 segfault. However, you won't be able to create an ELFNN binary
3637 with a section named "oc" that needs relocations, but that's
3638 the kind of ugly side-effects you get when detecting section
3639 types based on their names... In practice, this limitation is
3640 unlikely to bite. */
3641 if (strcmp (name, ".reloc") == 0)
3642 hdr->sh_type = SHT_PROGBITS;
3647 /* _TLS_MODULE_BASE_ needs to be treated especially when linking
3648 executables. Rather than setting it to the beginning of the TLS
3649 section, we have to set it to the end. This function may be called
3650 multiple times, it is idempotent. */
3653 elf_i386_set_tls_module_base (struct bfd_link_info *info)
3655 struct elf_i386_link_hash_table *htab;
3656 struct bfd_link_hash_entry *base;
3658 if (!bfd_link_executable (info))
3661 htab = elf_i386_hash_table (info);
3665 base = htab->tls_module_base;
3669 base->u.def.value = htab->elf.tls_size;
3672 /* Return the base VMA address which should be subtracted from real addresses
3673 when resolving @dtpoff relocation.
3674 This is PT_TLS segment p_vaddr. */
3677 elf_i386_dtpoff_base (struct bfd_link_info *info)
3679 /* If tls_sec is NULL, we should have signalled an error already. */
3680 if (elf_hash_table (info)->tls_sec == NULL)
3682 return elf_hash_table (info)->tls_sec->vma;
3685 /* Return the relocation value for @tpoff relocation
3686 if STT_TLS virtual address is ADDRESS. */
3689 elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address)
3691 struct elf_link_hash_table *htab = elf_hash_table (info);
3692 const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd);
3693 bfd_vma static_tls_size;
3695 /* If tls_sec is NULL, we should have signalled an error already. */
3696 if (htab->tls_sec == NULL)
3699 /* Consider special static TLS alignment requirements. */
3700 static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment);
3701 return static_tls_size + htab->tls_sec->vma - address;
3704 /* Relocate an i386 ELF section. */
3707 elf_i386_relocate_section (bfd *output_bfd,
3708 struct bfd_link_info *info,
3710 asection *input_section,
3712 Elf_Internal_Rela *relocs,
3713 Elf_Internal_Sym *local_syms,
3714 asection **local_sections)
3716 struct elf_i386_link_hash_table *htab;
3717 Elf_Internal_Shdr *symtab_hdr;
3718 struct elf_link_hash_entry **sym_hashes;
3719 bfd_vma *local_got_offsets;
3720 bfd_vma *local_tlsdesc_gotents;
3721 Elf_Internal_Rela *rel;
3722 Elf_Internal_Rela *wrel;
3723 Elf_Internal_Rela *relend;
3724 bfd_boolean is_vxworks_tls;
3725 unsigned plt_entry_size;
3727 BFD_ASSERT (is_i386_elf (input_bfd));
3729 htab = elf_i386_hash_table (info);
3732 symtab_hdr = &elf_symtab_hdr (input_bfd);
3733 sym_hashes = elf_sym_hashes (input_bfd);
3734 local_got_offsets = elf_local_got_offsets (input_bfd);
3735 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
3736 /* We have to handle relocations in vxworks .tls_vars sections
3737 specially, because the dynamic loader is 'weird'. */
3738 is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks
3739 && bfd_link_pic (info)
3740 && !strcmp (input_section->output_section->name,
3743 elf_i386_set_tls_module_base (info);
3745 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
3747 rel = wrel = relocs;
3748 relend = relocs + input_section->reloc_count;
3749 for (; rel < relend; wrel++, rel++)
3751 unsigned int r_type;
3752 reloc_howto_type *howto;
3753 unsigned long r_symndx;
3754 struct elf_link_hash_entry *h;
3755 struct elf_i386_link_hash_entry *eh;
3756 Elf_Internal_Sym *sym;
3758 bfd_vma off, offplt, plt_offset;
3760 bfd_boolean unresolved_reloc;
3761 bfd_reloc_status_type r;
3765 asection *resolved_plt;
3766 bfd_boolean resolved_to_zero;
3768 r_type = ELF32_R_TYPE (rel->r_info);
3769 if (r_type == R_386_GNU_VTINHERIT
3770 || r_type == R_386_GNU_VTENTRY)
3777 if ((indx = r_type) >= R_386_standard
3778 && ((indx = r_type - R_386_ext_offset) - R_386_standard
3779 >= R_386_ext - R_386_standard)
3780 && ((indx = r_type - R_386_tls_offset) - R_386_ext
3781 >= R_386_ext2 - R_386_ext))
3783 (*_bfd_error_handler)
3784 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
3785 input_bfd, input_section, r_type);
3786 bfd_set_error (bfd_error_bad_value);
3789 howto = elf_howto_table + indx;
3791 r_symndx = ELF32_R_SYM (rel->r_info);
3795 unresolved_reloc = FALSE;
3796 if (r_symndx < symtab_hdr->sh_info)
3798 sym = local_syms + r_symndx;
3799 sec = local_sections[r_symndx];
3800 relocation = (sec->output_section->vma
3801 + sec->output_offset
3803 st_size = sym->st_size;
3805 if (ELF_ST_TYPE (sym->st_info) == STT_SECTION
3806 && ((sec->flags & SEC_MERGE) != 0
3807 || (bfd_link_relocatable (info)
3808 && sec->output_offset != 0)))
3811 bfd_byte *where = contents + rel->r_offset;
3813 switch (howto->size)
3816 addend = bfd_get_8 (input_bfd, where);
3817 if (howto->pc_relative)
3819 addend = (addend ^ 0x80) - 0x80;
3824 addend = bfd_get_16 (input_bfd, where);
3825 if (howto->pc_relative)
3827 addend = (addend ^ 0x8000) - 0x8000;
3832 addend = bfd_get_32 (input_bfd, where);
3833 if (howto->pc_relative)
3835 addend = (addend ^ 0x80000000) - 0x80000000;
3843 if (bfd_link_relocatable (info))
3844 addend += sec->output_offset;
3847 asection *msec = sec;
3848 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec,
3850 addend -= relocation;
3851 addend += msec->output_section->vma + msec->output_offset;
3854 switch (howto->size)
3857 /* FIXME: overflow checks. */
3858 if (howto->pc_relative)
3860 bfd_put_8 (input_bfd, addend, where);
3863 if (howto->pc_relative)
3865 bfd_put_16 (input_bfd, addend, where);
3868 if (howto->pc_relative)
3870 bfd_put_32 (input_bfd, addend, where);
3874 else if (!bfd_link_relocatable (info)
3875 && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
3877 /* Relocate against local STT_GNU_IFUNC symbol. */
3878 h = elf_i386_get_local_sym_hash (htab, input_bfd, rel,
3883 /* Set STT_GNU_IFUNC symbol value. */
3884 h->root.u.def.value = sym->st_value;
3885 h->root.u.def.section = sec;
3890 bfd_boolean warned ATTRIBUTE_UNUSED;
3891 bfd_boolean ignored ATTRIBUTE_UNUSED;
3893 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
3894 r_symndx, symtab_hdr, sym_hashes,
3896 unresolved_reloc, warned, ignored);
3900 if (sec != NULL && discarded_section (sec))
3902 _bfd_clear_contents (howto, input_bfd, input_section,
3903 contents + rel->r_offset);
3904 wrel->r_offset = rel->r_offset;
3908 /* For ld -r, remove relocations in debug sections against
3909 sections defined in discarded sections. Not done for
3910 eh_frame editing code expects to be present. */
3911 if (bfd_link_relocatable (info)
3912 && (input_section->flags & SEC_DEBUGGING))
3918 if (bfd_link_relocatable (info))
3925 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle
3926 it here if it is defined in a non-shared object. */
3928 && h->type == STT_GNU_IFUNC
3931 asection *plt, *gotplt, *base_got;
3935 if ((input_section->flags & SEC_ALLOC) == 0)
3937 /* Dynamic relocs are not propagated for SEC_DEBUGGING
3938 sections because such sections are not SEC_ALLOC and
3939 thus ld.so will not process them. */
3940 if ((input_section->flags & SEC_DEBUGGING) != 0)
3944 else if (h->plt.offset == (bfd_vma) -1)
3947 /* STT_GNU_IFUNC symbol must go through PLT. */
3948 if (htab->elf.splt != NULL)
3950 plt = htab->elf.splt;
3951 gotplt = htab->elf.sgotplt;
3955 plt = htab->elf.iplt;
3956 gotplt = htab->elf.igotplt;
3959 relocation = (plt->output_section->vma
3960 + plt->output_offset + h->plt.offset);
3965 if (h->root.root.string)
3966 name = h->root.root.string;
3968 name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym,
3970 (*_bfd_error_handler)
3971 (_("%B: relocation %s against STT_GNU_IFUNC "
3972 "symbol `%s' isn't handled by %s"), input_bfd,
3973 elf_howto_table[r_type].name,
3974 name, __FUNCTION__);
3975 bfd_set_error (bfd_error_bad_value);
3979 /* Generate dynamic relcoation only when there is a
3980 non-GOT reference in a shared object. */
3981 if (bfd_link_pic (info) && h->non_got_ref)
3983 Elf_Internal_Rela outrel;
3987 /* Need a dynamic relocation to get the real function
3989 offset = _bfd_elf_section_offset (output_bfd,
3993 if (offset == (bfd_vma) -1
3994 || offset == (bfd_vma) -2)
3997 outrel.r_offset = (input_section->output_section->vma
3998 + input_section->output_offset
4001 if (h->dynindx == -1
4003 || bfd_link_executable (info))
4005 /* This symbol is resolved locally. */
4006 outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
4007 bfd_put_32 (output_bfd,
4008 (h->root.u.def.value
4009 + h->root.u.def.section->output_section->vma
4010 + h->root.u.def.section->output_offset),
4014 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4016 sreloc = htab->elf.irelifunc;
4017 elf_append_rel (output_bfd, sreloc, &outrel);
4019 /* If this reloc is against an external symbol, we
4020 do not want to fiddle with the addend. Otherwise,
4021 we need to include the symbol value so that it
4022 becomes an addend for the dynamic reloc. For an
4023 internal symbol, we have updated addend. */
4033 base_got = htab->elf.sgot;
4034 off = h->got.offset;
4036 if (base_got == NULL)
4039 if (off == (bfd_vma) -1)
4041 /* We can't use h->got.offset here to save state, or
4042 even just remember the offset, as finish_dynamic_symbol
4043 would use that as offset into .got. */
4045 if (htab->elf.splt != NULL)
4047 plt_index = h->plt.offset / plt_entry_size - 1;
4048 off = (plt_index + 3) * 4;
4049 base_got = htab->elf.sgotplt;
4053 plt_index = h->plt.offset / plt_entry_size;
4054 off = plt_index * 4;
4055 base_got = htab->elf.igotplt;
4058 if (h->dynindx == -1
4062 /* This references the local defitionion. We must
4063 initialize this entry in the global offset table.
4064 Since the offset must always be a multiple of 8,
4065 we use the least significant bit to record
4066 whether we have initialized it already.
4068 When doing a dynamic link, we create a .rela.got
4069 relocation entry to initialize the value. This
4070 is done in the finish_dynamic_symbol routine. */
4075 bfd_put_32 (output_bfd, relocation,
4076 base_got->contents + off);
4083 /* Adjust for static executables. */
4084 if (htab->elf.splt == NULL)
4085 relocation += gotplt->output_offset;
4089 relocation = (base_got->output_section->vma
4090 + base_got->output_offset + off
4091 - gotplt->output_section->vma
4092 - gotplt->output_offset);
4093 /* Adjust for static executables. */
4094 if (htab->elf.splt == NULL)
4095 relocation += gotplt->output_offset;
4101 relocation -= (gotplt->output_section->vma
4102 + gotplt->output_offset);
4107 eh = (struct elf_i386_link_hash_entry *) h;
4108 resolved_to_zero = (eh != NULL
4109 && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh));
4114 /* Avoid optimizing _DYNAMIC since ld.so may use its
4115 link-time address. */
4116 if (h == htab->elf.hdynamic)
4119 if (bfd_link_pic (info))
4121 /* It is OK to convert mov to lea and convert indirect
4122 branch to direct branch. It is OK to convert adc,
4123 add, and, cmp, or, sbb, sub, test, xor only when PIC
4125 unsigned int opcode, addend;
4126 addend = bfd_get_32 (input_bfd, contents + rel->r_offset);
4129 opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4130 if (opcode != 0x8b && opcode != 0xff)
4134 /* Resolve "mov GOT[(%reg)], %reg",
4135 "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]"
4136 and "binop foo@GOT[(%reg)], %reg". */
4138 || (h->plt.offset == (bfd_vma) -1
4139 && h->got.offset == (bfd_vma) -1)
4140 || htab->elf.sgotplt == NULL)
4143 offplt = (htab->elf.sgotplt->output_section->vma
4144 + htab->elf.sgotplt->output_offset);
4146 /* It is relative to .got.plt section. */
4147 if (h->got.offset != (bfd_vma) -1)
4148 /* Use GOT entry. Mask off the least significant bit in
4149 GOT offset which may be set by R_386_GOT32 processing
4151 relocation = (htab->elf.sgot->output_section->vma
4152 + htab->elf.sgot->output_offset
4153 + (h->got.offset & ~1) - offplt);
4155 /* Use GOTPLT entry. */
4156 relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4;
4158 if (!bfd_link_pic (info))
4160 /* If not PIC, add the .got.plt section address for
4161 baseless addressing. */
4163 modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4164 if ((modrm & 0xc7) == 0x5)
4165 relocation += offplt;
4168 unresolved_reloc = FALSE;
4173 /* Relocation is to the entry for this symbol in the global
4175 if (htab->elf.sgot == NULL)
4182 off = h->got.offset;
4183 dyn = htab->elf.dynamic_sections_created;
4184 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
4185 bfd_link_pic (info),
4187 || (bfd_link_pic (info)
4188 && SYMBOL_REFERENCES_LOCAL (info, h))
4189 || (ELF_ST_VISIBILITY (h->other)
4190 && h->root.type == bfd_link_hash_undefweak))
4192 /* This is actually a static link, or it is a
4193 -Bsymbolic link and the symbol is defined
4194 locally, or the symbol was forced to be local
4195 because of a version file. We must initialize
4196 this entry in the global offset table. Since the
4197 offset must always be a multiple of 4, we use the
4198 least significant bit to record whether we have
4199 initialized it already.
4201 When doing a dynamic link, we create a .rel.got
4202 relocation entry to initialize the value. This
4203 is done in the finish_dynamic_symbol routine. */
4208 bfd_put_32 (output_bfd, relocation,
4209 htab->elf.sgot->contents + off);
4214 unresolved_reloc = FALSE;
4218 if (local_got_offsets == NULL)
4221 off = local_got_offsets[r_symndx];
4223 /* The offset must always be a multiple of 4. We use
4224 the least significant bit to record whether we have
4225 already generated the necessary reloc. */
4230 bfd_put_32 (output_bfd, relocation,
4231 htab->elf.sgot->contents + off);
4233 if (bfd_link_pic (info))
4236 Elf_Internal_Rela outrel;
4238 s = htab->elf.srelgot;
4242 outrel.r_offset = (htab->elf.sgot->output_section->vma
4243 + htab->elf.sgot->output_offset
4245 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4246 elf_append_rel (output_bfd, s, &outrel);
4249 local_got_offsets[r_symndx] |= 1;
4253 if (off >= (bfd_vma) -2)
4256 relocation = htab->elf.sgot->output_section->vma
4257 + htab->elf.sgot->output_offset + off
4258 - htab->elf.sgotplt->output_section->vma
4259 - htab->elf.sgotplt->output_offset;
4263 /* Relocation is relative to the start of the global offset
4266 /* Check to make sure it isn't a protected function or data
4267 symbol for shared library since it may not be local when
4268 used as function address or with copy relocation. We also
4269 need to make sure that a symbol is referenced locally. */
4270 if (!bfd_link_executable (info) && h)
4272 if (!h->def_regular)
4276 switch (ELF_ST_VISIBILITY (h->other))
4279 v = _("hidden symbol");
4282 v = _("internal symbol");
4285 v = _("protected symbol");
4292 (*_bfd_error_handler)
4293 (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"),
4294 input_bfd, v, h->root.root.string);
4295 bfd_set_error (bfd_error_bad_value);
4298 else if (!SYMBOL_REFERENCES_LOCAL (info, h)
4299 && (h->type == STT_FUNC
4300 || h->type == STT_OBJECT)
4301 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
4303 (*_bfd_error_handler)
4304 (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"),
4306 h->type == STT_FUNC ? "function" : "data",
4307 h->root.root.string);
4308 bfd_set_error (bfd_error_bad_value);
4313 /* Note that sgot is not involved in this
4314 calculation. We always want the start of .got.plt. If we
4315 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
4316 permitted by the ABI, we might have to change this
4318 relocation -= htab->elf.sgotplt->output_section->vma
4319 + htab->elf.sgotplt->output_offset;
4323 /* Use global offset table as symbol value. */
4324 relocation = htab->elf.sgotplt->output_section->vma
4325 + htab->elf.sgotplt->output_offset;
4326 unresolved_reloc = FALSE;
4330 /* Relocation is to the entry for this symbol in the
4331 procedure linkage table. */
4333 /* Resolve a PLT32 reloc against a local symbol directly,
4334 without using the procedure linkage table. */
4338 if ((h->plt.offset == (bfd_vma) -1
4339 && eh->plt_got.offset == (bfd_vma) -1)
4340 || htab->elf.splt == NULL)
4342 /* We didn't make a PLT entry for this symbol. This
4343 happens when statically linking PIC code, or when
4344 using -Bsymbolic. */
4348 if (h->plt.offset != (bfd_vma) -1)
4350 resolved_plt = htab->elf.splt;
4351 plt_offset = h->plt.offset;
4355 resolved_plt = htab->plt_got;
4356 plt_offset = eh->plt_got.offset;
4359 relocation = (resolved_plt->output_section->vma
4360 + resolved_plt->output_offset
4362 unresolved_reloc = FALSE;
4366 /* Set to symbol size. */
4367 relocation = st_size;
4372 if ((input_section->flags & SEC_ALLOC) == 0
4376 /* Copy dynamic function pointer relocations. Don't generate
4377 dynamic relocations against resolved undefined weak symbols
4378 in PIE, except for R_386_PC32. */
4379 if ((bfd_link_pic (info)
4381 || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
4382 && (!resolved_to_zero
4383 || r_type == R_386_PC32))
4384 || h->root.type != bfd_link_hash_undefweak))
4385 && ((r_type != R_386_PC32 && r_type != R_386_SIZE32)
4386 || !SYMBOL_CALLS_LOCAL (info, h)))
4387 || (ELIMINATE_COPY_RELOCS
4388 && !bfd_link_pic (info)
4392 || eh->func_pointer_refcount > 0
4393 || (h->root.type == bfd_link_hash_undefweak
4394 && !resolved_to_zero))
4395 && ((h->def_dynamic && !h->def_regular)
4396 /* Undefined weak symbol is bound locally when
4398 || h->root.type == bfd_link_hash_undefweak)))
4400 Elf_Internal_Rela outrel;
4401 bfd_boolean skip, relocate;
4404 /* When generating a shared object, these relocations
4405 are copied into the output file to be resolved at run
4412 _bfd_elf_section_offset (output_bfd, info, input_section,
4414 if (outrel.r_offset == (bfd_vma) -1)
4416 else if (outrel.r_offset == (bfd_vma) -2)
4417 skip = TRUE, relocate = TRUE;
4418 outrel.r_offset += (input_section->output_section->vma
4419 + input_section->output_offset);
4422 memset (&outrel, 0, sizeof outrel);
4425 && (r_type == R_386_PC32
4426 || !bfd_link_pic (info)
4427 || !SYMBOLIC_BIND (info, h)
4428 || !h->def_regular))
4429 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
4432 /* This symbol is local, or marked to become local. */
4434 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4437 sreloc = elf_section_data (input_section)->sreloc;
4439 if (sreloc == NULL || sreloc->contents == NULL)
4441 r = bfd_reloc_notsupported;
4442 goto check_relocation_error;
4445 elf_append_rel (output_bfd, sreloc, &outrel);
4447 /* If this reloc is against an external symbol, we do
4448 not want to fiddle with the addend. Otherwise, we
4449 need to include the symbol value so that it becomes
4450 an addend for the dynamic reloc. */
4457 if (!bfd_link_executable (info))
4459 Elf_Internal_Rela outrel;
4462 outrel.r_offset = rel->r_offset
4463 + input_section->output_section->vma
4464 + input_section->output_offset;
4465 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
4466 sreloc = elf_section_data (input_section)->sreloc;
4469 elf_append_rel (output_bfd, sreloc, &outrel);
4474 case R_386_TLS_GOTDESC:
4475 case R_386_TLS_DESC_CALL:
4476 case R_386_TLS_IE_32:
4477 case R_386_TLS_GOTIE:
4478 tls_type = GOT_UNKNOWN;
4479 if (h == NULL && local_got_offsets)
4480 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
4482 tls_type = elf_i386_hash_entry(h)->tls_type;
4483 if (tls_type == GOT_TLS_IE)
4484 tls_type = GOT_TLS_IE_NEG;
4486 if (! elf_i386_tls_transition (info, input_bfd,
4487 input_section, contents,
4488 symtab_hdr, sym_hashes,
4489 &r_type, tls_type, rel,
4490 relend, h, r_symndx))
4493 if (r_type == R_386_TLS_LE_32)
4495 BFD_ASSERT (! unresolved_reloc);
4496 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4501 /* GD->LE transition. */
4502 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4505 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4507 movl %gs:0, %eax; subl $foo@tpoff, %eax
4508 (6 byte form of subl). */
4509 memcpy (contents + rel->r_offset - 3,
4510 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4511 roff = rel->r_offset + 5;
4515 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4517 movl %gs:0, %eax; subl $foo@tpoff, %eax
4518 (6 byte form of subl). */
4519 memcpy (contents + rel->r_offset - 2,
4520 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
4521 roff = rel->r_offset + 6;
4523 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4525 /* Skip R_386_PC32/R_386_PLT32. */
4530 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4532 /* GDesc -> LE transition.
4533 It's originally something like:
4534 leal x@tlsdesc(%ebx), %eax
4538 Registers other than %eax may be set up here. */
4543 roff = rel->r_offset;
4544 val = bfd_get_8 (input_bfd, contents + roff - 1);
4546 /* Now modify the instruction as appropriate. */
4547 /* aoliva FIXME: remove the above and xor the byte
4549 bfd_put_8 (output_bfd, val ^ 0x86,
4550 contents + roff - 1);
4551 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4555 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4557 /* GDesc -> LE transition.
4565 roff = rel->r_offset;
4566 bfd_put_8 (output_bfd, 0x66, contents + roff);
4567 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4570 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
4574 /* IE->LE transition:
4575 Originally it can be one of:
4583 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4586 /* movl foo, %eax. */
4587 bfd_put_8 (output_bfd, 0xb8,
4588 contents + rel->r_offset - 1);
4594 type = bfd_get_8 (input_bfd,
4595 contents + rel->r_offset - 2);
4600 bfd_put_8 (output_bfd, 0xc7,
4601 contents + rel->r_offset - 2);
4602 bfd_put_8 (output_bfd,
4603 0xc0 | ((val >> 3) & 7),
4604 contents + rel->r_offset - 1);
4608 bfd_put_8 (output_bfd, 0x81,
4609 contents + rel->r_offset - 2);
4610 bfd_put_8 (output_bfd,
4611 0xc0 | ((val >> 3) & 7),
4612 contents + rel->r_offset - 1);
4619 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4620 contents + rel->r_offset);
4625 unsigned int val, type;
4627 /* {IE_32,GOTIE}->LE transition:
4628 Originally it can be one of:
4629 subl foo(%reg1), %reg2
4630 movl foo(%reg1), %reg2
4631 addl foo(%reg1), %reg2
4634 movl $foo, %reg2 (6 byte form)
4635 addl $foo, %reg2. */
4636 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4637 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4641 bfd_put_8 (output_bfd, 0xc7,
4642 contents + rel->r_offset - 2);
4643 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4644 contents + rel->r_offset - 1);
4646 else if (type == 0x2b)
4649 bfd_put_8 (output_bfd, 0x81,
4650 contents + rel->r_offset - 2);
4651 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
4652 contents + rel->r_offset - 1);
4654 else if (type == 0x03)
4657 bfd_put_8 (output_bfd, 0x81,
4658 contents + rel->r_offset - 2);
4659 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
4660 contents + rel->r_offset - 1);
4664 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
4665 bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation),
4666 contents + rel->r_offset);
4668 bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation),
4669 contents + rel->r_offset);
4674 if (htab->elf.sgot == NULL)
4679 off = h->got.offset;
4680 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
4684 if (local_got_offsets == NULL)
4687 off = local_got_offsets[r_symndx];
4688 offplt = local_tlsdesc_gotents[r_symndx];
4695 Elf_Internal_Rela outrel;
4699 if (htab->elf.srelgot == NULL)
4702 indx = h && h->dynindx != -1 ? h->dynindx : 0;
4704 if (GOT_TLS_GDESC_P (tls_type))
4707 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
4708 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
4709 <= htab->elf.sgotplt->size);
4710 outrel.r_offset = (htab->elf.sgotplt->output_section->vma
4711 + htab->elf.sgotplt->output_offset
4713 + htab->sgotplt_jump_table_size);
4714 sreloc = htab->elf.srelplt;
4715 loc = sreloc->contents;
4716 loc += (htab->next_tls_desc_index++
4717 * sizeof (Elf32_External_Rel));
4718 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
4719 <= sreloc->contents + sreloc->size);
4720 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
4723 BFD_ASSERT (! unresolved_reloc);
4724 bfd_put_32 (output_bfd,
4725 relocation - elf_i386_dtpoff_base (info),
4726 htab->elf.sgotplt->contents + offplt
4727 + htab->sgotplt_jump_table_size + 4);
4731 bfd_put_32 (output_bfd, 0,
4732 htab->elf.sgotplt->contents + offplt
4733 + htab->sgotplt_jump_table_size + 4);
4737 sreloc = htab->elf.srelgot;
4739 outrel.r_offset = (htab->elf.sgot->output_section->vma
4740 + htab->elf.sgot->output_offset + off);
4742 if (GOT_TLS_GD_P (tls_type))
4743 dr_type = R_386_TLS_DTPMOD32;
4744 else if (GOT_TLS_GDESC_P (tls_type))
4746 else if (tls_type == GOT_TLS_IE_POS)
4747 dr_type = R_386_TLS_TPOFF;
4749 dr_type = R_386_TLS_TPOFF32;
4751 if (dr_type == R_386_TLS_TPOFF && indx == 0)
4752 bfd_put_32 (output_bfd,
4753 relocation - elf_i386_dtpoff_base (info),
4754 htab->elf.sgot->contents + off);
4755 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
4756 bfd_put_32 (output_bfd,
4757 elf_i386_dtpoff_base (info) - relocation,
4758 htab->elf.sgot->contents + off);
4759 else if (dr_type != R_386_TLS_DESC)
4760 bfd_put_32 (output_bfd, 0,
4761 htab->elf.sgot->contents + off);
4762 outrel.r_info = ELF32_R_INFO (indx, dr_type);
4764 elf_append_rel (output_bfd, sreloc, &outrel);
4766 if (GOT_TLS_GD_P (tls_type))
4770 BFD_ASSERT (! unresolved_reloc);
4771 bfd_put_32 (output_bfd,
4772 relocation - elf_i386_dtpoff_base (info),
4773 htab->elf.sgot->contents + off + 4);
4777 bfd_put_32 (output_bfd, 0,
4778 htab->elf.sgot->contents + off + 4);
4779 outrel.r_info = ELF32_R_INFO (indx,
4780 R_386_TLS_DTPOFF32);
4781 outrel.r_offset += 4;
4782 elf_append_rel (output_bfd, sreloc, &outrel);
4785 else if (tls_type == GOT_TLS_IE_BOTH)
4787 bfd_put_32 (output_bfd,
4789 ? relocation - elf_i386_dtpoff_base (info)
4791 htab->elf.sgot->contents + off + 4);
4792 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
4793 outrel.r_offset += 4;
4794 elf_append_rel (output_bfd, sreloc, &outrel);
4801 local_got_offsets[r_symndx] |= 1;
4804 if (off >= (bfd_vma) -2
4805 && ! GOT_TLS_GDESC_P (tls_type))
4807 if (r_type == R_386_TLS_GOTDESC
4808 || r_type == R_386_TLS_DESC_CALL)
4810 relocation = htab->sgotplt_jump_table_size + offplt;
4811 unresolved_reloc = FALSE;
4813 else if (r_type == ELF32_R_TYPE (rel->r_info))
4815 bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma
4816 + htab->elf.sgotplt->output_offset;
4817 relocation = htab->elf.sgot->output_section->vma
4818 + htab->elf.sgot->output_offset + off - g_o_t;
4819 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
4820 && tls_type == GOT_TLS_IE_BOTH)
4822 if (r_type == R_386_TLS_IE)
4823 relocation += g_o_t;
4824 unresolved_reloc = FALSE;
4826 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
4828 unsigned int val, type;
4831 /* GD->IE transition. */
4832 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
4833 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
4836 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
4838 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4840 roff = rel->r_offset - 3;
4844 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
4846 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
4847 roff = rel->r_offset - 2;
4849 memcpy (contents + roff,
4850 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
4851 contents[roff + 7] = 0x80 | (val & 7);
4852 /* If foo is used only with foo@gotntpoff(%reg) and
4853 foo@indntpoff, but not with foo@gottpoff(%reg), change
4854 subl $foo@gottpoff(%reg), %eax
4856 addl $foo@gotntpoff(%reg), %eax. */
4857 if (tls_type == GOT_TLS_IE_POS)
4858 contents[roff + 6] = 0x03;
4859 bfd_put_32 (output_bfd,
4860 htab->elf.sgot->output_section->vma
4861 + htab->elf.sgot->output_offset + off
4862 - htab->elf.sgotplt->output_section->vma
4863 - htab->elf.sgotplt->output_offset,
4864 contents + roff + 8);
4865 /* Skip R_386_PLT32. */
4870 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
4872 /* GDesc -> IE transition.
4873 It's originally something like:
4874 leal x@tlsdesc(%ebx), %eax
4877 movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax
4879 movl x@gottpoff(%ebx), %eax # before negl %eax
4881 Registers other than %eax may be set up here. */
4885 /* First, make sure it's a leal adding ebx to a 32-bit
4886 offset into any register, although it's probably
4887 almost always going to be eax. */
4888 roff = rel->r_offset;
4890 /* Now modify the instruction as appropriate. */
4891 /* To turn a leal into a movl in the form we use it, it
4892 suffices to change the first byte from 0x8d to 0x8b.
4893 aoliva FIXME: should we decide to keep the leal, all
4894 we have to do is remove the statement below, and
4895 adjust the relaxation of R_386_TLS_DESC_CALL. */
4896 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
4898 if (tls_type == GOT_TLS_IE_BOTH)
4901 bfd_put_32 (output_bfd,
4902 htab->elf.sgot->output_section->vma
4903 + htab->elf.sgot->output_offset + off
4904 - htab->elf.sgotplt->output_section->vma
4905 - htab->elf.sgotplt->output_offset,
4909 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
4911 /* GDesc -> IE transition.
4919 depending on how we transformed the TLS_GOTDESC above.
4924 roff = rel->r_offset;
4926 /* Now modify the instruction as appropriate. */
4927 if (tls_type != GOT_TLS_IE_NEG)
4930 bfd_put_8 (output_bfd, 0x66, contents + roff);
4931 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
4936 bfd_put_8 (output_bfd, 0xf7, contents + roff);
4937 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
4947 if (! elf_i386_tls_transition (info, input_bfd,
4948 input_section, contents,
4949 symtab_hdr, sym_hashes,
4950 &r_type, GOT_UNKNOWN, rel,
4951 relend, h, r_symndx))
4954 if (r_type != R_386_TLS_LDM)
4956 /* LD->LE transition:
4957 leal foo(%reg), %eax; call ___tls_get_addr.
4959 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
4960 BFD_ASSERT (r_type == R_386_TLS_LE_32);
4961 memcpy (contents + rel->r_offset - 2,
4962 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
4963 /* Skip R_386_PC32/R_386_PLT32. */
4969 if (htab->elf.sgot == NULL)
4972 off = htab->tls_ldm_got.offset;
4977 Elf_Internal_Rela outrel;
4979 if (htab->elf.srelgot == NULL)
4982 outrel.r_offset = (htab->elf.sgot->output_section->vma
4983 + htab->elf.sgot->output_offset + off);
4985 bfd_put_32 (output_bfd, 0,
4986 htab->elf.sgot->contents + off);
4987 bfd_put_32 (output_bfd, 0,
4988 htab->elf.sgot->contents + off + 4);
4989 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
4990 elf_append_rel (output_bfd, htab->elf.srelgot, &outrel);
4991 htab->tls_ldm_got.offset |= 1;
4993 relocation = htab->elf.sgot->output_section->vma
4994 + htab->elf.sgot->output_offset + off
4995 - htab->elf.sgotplt->output_section->vma
4996 - htab->elf.sgotplt->output_offset;
4997 unresolved_reloc = FALSE;
5000 case R_386_TLS_LDO_32:
5001 if (!bfd_link_executable (info)
5002 || (input_section->flags & SEC_CODE) == 0)
5003 relocation -= elf_i386_dtpoff_base (info);
5005 /* When converting LDO to LE, we must negate. */
5006 relocation = -elf_i386_tpoff (info, relocation);
5009 case R_386_TLS_LE_32:
5011 if (!bfd_link_executable (info))
5013 Elf_Internal_Rela outrel;
5016 outrel.r_offset = rel->r_offset
5017 + input_section->output_section->vma
5018 + input_section->output_offset;
5019 if (h != NULL && h->dynindx != -1)
5023 if (r_type == R_386_TLS_LE_32)
5024 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
5026 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
5027 sreloc = elf_section_data (input_section)->sreloc;
5030 elf_append_rel (output_bfd, sreloc, &outrel);
5033 else if (r_type == R_386_TLS_LE_32)
5034 relocation = elf_i386_dtpoff_base (info) - relocation;
5036 relocation -= elf_i386_dtpoff_base (info);
5038 else if (r_type == R_386_TLS_LE_32)
5039 relocation = elf_i386_tpoff (info, relocation);
5041 relocation = -elf_i386_tpoff (info, relocation);
5048 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
5049 because such sections are not SEC_ALLOC and thus ld.so will
5050 not process them. */
5051 if (unresolved_reloc
5052 && !((input_section->flags & SEC_DEBUGGING) != 0
5054 && _bfd_elf_section_offset (output_bfd, info, input_section,
5055 rel->r_offset) != (bfd_vma) -1)
5057 (*_bfd_error_handler)
5058 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
5061 (long) rel->r_offset,
5063 h->root.root.string);
5068 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
5069 contents, rel->r_offset,
5072 check_relocation_error:
5073 if (r != bfd_reloc_ok)
5078 name = h->root.root.string;
5081 name = bfd_elf_string_from_elf_section (input_bfd,
5082 symtab_hdr->sh_link,
5087 name = bfd_section_name (input_bfd, sec);
5090 if (r == bfd_reloc_overflow)
5092 if (! ((*info->callbacks->reloc_overflow)
5093 (info, (h ? &h->root : NULL), name, howto->name,
5094 (bfd_vma) 0, input_bfd, input_section,
5100 (*_bfd_error_handler)
5101 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
5102 input_bfd, input_section,
5103 (long) rel->r_offset, name, (int) r);
5114 Elf_Internal_Shdr *rel_hdr;
5115 size_t deleted = rel - wrel;
5117 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section);
5118 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5119 if (rel_hdr->sh_size == 0)
5121 /* It is too late to remove an empty reloc section. Leave
5123 ??? What is wrong with an empty section??? */
5124 rel_hdr->sh_size = rel_hdr->sh_entsize;
5127 rel_hdr = _bfd_elf_single_rel_hdr (input_section);
5128 rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted;
5129 input_section->reloc_count -= deleted;
5135 /* Finish up dynamic symbol handling. We set the contents of various
5136 dynamic sections here. */
5139 elf_i386_finish_dynamic_symbol (bfd *output_bfd,
5140 struct bfd_link_info *info,
5141 struct elf_link_hash_entry *h,
5142 Elf_Internal_Sym *sym)
5144 struct elf_i386_link_hash_table *htab;
5145 unsigned plt_entry_size;
5146 const struct elf_i386_backend_data *abed;
5147 struct elf_i386_link_hash_entry *eh;
5148 bfd_boolean local_undefweak;
5150 htab = elf_i386_hash_table (info);
5154 abed = get_elf_i386_backend_data (output_bfd);
5155 plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd);
5157 eh = (struct elf_i386_link_hash_entry *) h;
5159 /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for
5160 resolved undefined weak symbols in executable so that their
5161 references have value 0 at run-time. */
5162 local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh);
5164 if (h->plt.offset != (bfd_vma) -1)
5168 Elf_Internal_Rela rel;
5170 asection *plt, *gotplt, *relplt;
5172 /* When building a static executable, use .iplt, .igot.plt and
5173 .rel.iplt sections for STT_GNU_IFUNC symbols. */
5174 if (htab->elf.splt != NULL)
5176 plt = htab->elf.splt;
5177 gotplt = htab->elf.sgotplt;
5178 relplt = htab->elf.srelplt;
5182 plt = htab->elf.iplt;
5183 gotplt = htab->elf.igotplt;
5184 relplt = htab->elf.irelplt;
5187 /* This symbol has an entry in the procedure linkage table. Set
5190 if ((h->dynindx == -1
5192 && !((h->forced_local || bfd_link_executable (info))
5194 && h->type == STT_GNU_IFUNC))
5200 /* Get the index in the procedure linkage table which
5201 corresponds to this symbol. This is the index of this symbol
5202 in all the symbols for which we are making plt entries. The
5203 first entry in the procedure linkage table is reserved.
5205 Get the offset into the .got table of the entry that
5206 corresponds to this function. Each .got entry is 4 bytes.
5207 The first three are reserved.
5209 For static executables, we don't reserve anything. */
5211 if (plt == htab->elf.splt)
5213 got_offset = h->plt.offset / plt_entry_size - 1;
5214 got_offset = (got_offset + 3) * 4;
5218 got_offset = h->plt.offset / plt_entry_size;
5219 got_offset = got_offset * 4;
5222 /* Fill in the entry in the procedure linkage table. */
5223 if (! bfd_link_pic (info))
5225 memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry,
5226 abed->plt->plt_entry_size);
5227 bfd_put_32 (output_bfd,
5228 (gotplt->output_section->vma
5229 + gotplt->output_offset
5231 plt->contents + h->plt.offset
5232 + abed->plt->plt_got_offset);
5234 if (abed->is_vxworks)
5236 int s, k, reloc_index;
5238 /* Create the R_386_32 relocation referencing the GOT
5239 for this PLT entry. */
5241 /* S: Current slot number (zero-based). */
5242 s = ((h->plt.offset - abed->plt->plt_entry_size)
5243 / abed->plt->plt_entry_size);
5244 /* K: Number of relocations for PLTResolve. */
5245 if (bfd_link_pic (info))
5246 k = PLTRESOLVE_RELOCS_SHLIB;
5248 k = PLTRESOLVE_RELOCS;
5249 /* Skip the PLTresolve relocations, and the relocations for
5250 the other PLT slots. */
5251 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
5252 loc = (htab->srelplt2->contents + reloc_index
5253 * sizeof (Elf32_External_Rel));
5255 rel.r_offset = (htab->elf.splt->output_section->vma
5256 + htab->elf.splt->output_offset
5257 + h->plt.offset + 2),
5258 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5259 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5261 /* Create the R_386_32 relocation referencing the beginning of
5262 the PLT for this GOT entry. */
5263 rel.r_offset = (htab->elf.sgotplt->output_section->vma
5264 + htab->elf.sgotplt->output_offset
5266 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5267 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5268 loc + sizeof (Elf32_External_Rel));
5273 memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry,
5274 abed->plt->plt_entry_size);
5275 bfd_put_32 (output_bfd, got_offset,
5276 plt->contents + h->plt.offset
5277 + abed->plt->plt_got_offset);
5280 /* Fill in the entry in the global offset table. Leave the entry
5281 as zero for undefined weak symbol in PIE. No PLT relocation
5282 against undefined weak symbol in PIE. */
5283 if (!local_undefweak)
5285 bfd_put_32 (output_bfd,
5286 (plt->output_section->vma
5287 + plt->output_offset
5289 + abed->plt->plt_lazy_offset),
5290 gotplt->contents + got_offset);
5292 /* Fill in the entry in the .rel.plt section. */
5293 rel.r_offset = (gotplt->output_section->vma
5294 + gotplt->output_offset
5296 if (h->dynindx == -1
5297 || ((bfd_link_executable (info)
5298 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
5300 && h->type == STT_GNU_IFUNC))
5302 /* If an STT_GNU_IFUNC symbol is locally defined, generate
5303 R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend
5304 in the .got.plt section. */
5305 bfd_put_32 (output_bfd,
5306 (h->root.u.def.value
5307 + h->root.u.def.section->output_section->vma
5308 + h->root.u.def.section->output_offset),
5309 gotplt->contents + got_offset);
5310 rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE);
5311 /* R_386_IRELATIVE comes last. */
5312 plt_index = htab->next_irelative_index--;
5316 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
5317 plt_index = htab->next_jump_slot_index++;
5320 loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel);
5321 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
5323 /* Don't fill PLT entry for static executables. */
5324 if (plt == htab->elf.splt)
5326 bfd_put_32 (output_bfd,
5327 plt_index * sizeof (Elf32_External_Rel),
5328 plt->contents + h->plt.offset
5329 + abed->plt->plt_reloc_offset);
5330 bfd_put_32 (output_bfd, - (h->plt.offset
5331 + abed->plt->plt_plt_offset + 4),
5332 plt->contents + h->plt.offset
5333 + abed->plt->plt_plt_offset);
5337 else if (eh->plt_got.offset != (bfd_vma) -1)
5339 bfd_vma got_offset, plt_offset;
5340 asection *plt, *got, *gotplt;
5341 const bfd_byte *got_plt_entry;
5343 /* Offset of displacement of the indirect jump. */
5344 bfd_vma plt_got_offset = 2;
5346 /* Set the entry in the GOT procedure linkage table. */
5347 plt = htab->plt_got;
5348 got = htab->elf.sgot;
5349 gotplt = htab->elf.sgotplt;
5350 got_offset = h->got.offset;
5352 if (got_offset == (bfd_vma) -1
5358 /* Fill in the entry in the GOT procedure linkage table. */
5359 if (! bfd_link_pic (info))
5361 got_plt_entry = elf_i386_got_plt_entry;
5362 got_offset += got->output_section->vma + got->output_offset;
5366 got_plt_entry = elf_i386_pic_got_plt_entry;
5367 got_offset += (got->output_section->vma
5368 + got->output_offset
5369 - gotplt->output_section->vma
5370 - gotplt->output_offset);
5373 plt_offset = eh->plt_got.offset;
5374 memcpy (plt->contents + plt_offset, got_plt_entry,
5375 sizeof (elf_i386_got_plt_entry));
5376 bfd_put_32 (output_bfd, got_offset,
5377 plt->contents + plt_offset + plt_got_offset);
5380 if (!local_undefweak
5382 && (h->plt.offset != (bfd_vma) -1
5383 || eh->plt_got.offset != (bfd_vma) -1))
5385 /* Mark the symbol as undefined, rather than as defined in
5386 the .plt section. Leave the value if there were any
5387 relocations where pointer equality matters (this is a clue
5388 for the dynamic linker, to make function pointer
5389 comparisons work between an application and shared
5390 library), otherwise set it to zero. If a function is only
5391 called from a binary, there is no need to slow down
5392 shared libraries because of that. */
5393 sym->st_shndx = SHN_UNDEF;
5394 if (!h->pointer_equality_needed)
5398 /* Don't generate dynamic GOT relocation against undefined weak
5399 symbol in executable. */
5400 if (h->got.offset != (bfd_vma) -1
5401 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
5402 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0
5403 && !local_undefweak)
5405 Elf_Internal_Rela rel;
5407 /* This symbol has an entry in the global offset table. Set it
5410 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
5413 rel.r_offset = (htab->elf.sgot->output_section->vma
5414 + htab->elf.sgot->output_offset
5415 + (h->got.offset & ~(bfd_vma) 1));
5417 /* If this is a static link, or it is a -Bsymbolic link and the
5418 symbol is defined locally or was forced to be local because
5419 of a version file, we just want to emit a RELATIVE reloc.
5420 The entry in the global offset table will already have been
5421 initialized in the relocate_section function. */
5423 && h->type == STT_GNU_IFUNC)
5425 if (bfd_link_pic (info))
5427 /* Generate R_386_GLOB_DAT. */
5434 if (!h->pointer_equality_needed)
5437 /* For non-shared object, we can't use .got.plt, which
5438 contains the real function addres if we need pointer
5439 equality. We load the GOT entry with the PLT entry. */
5440 plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt;
5441 bfd_put_32 (output_bfd,
5442 (plt->output_section->vma
5443 + plt->output_offset + h->plt.offset),
5444 htab->elf.sgot->contents + h->got.offset);
5448 else if (bfd_link_pic (info)
5449 && SYMBOL_REFERENCES_LOCAL (info, h))
5451 BFD_ASSERT((h->got.offset & 1) != 0);
5452 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
5456 BFD_ASSERT((h->got.offset & 1) == 0);
5458 bfd_put_32 (output_bfd, (bfd_vma) 0,
5459 htab->elf.sgot->contents + h->got.offset);
5460 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
5463 elf_append_rel (output_bfd, htab->elf.srelgot, &rel);
5468 Elf_Internal_Rela rel;
5470 /* This symbol needs a copy reloc. Set it up. */
5472 if (h->dynindx == -1
5473 || (h->root.type != bfd_link_hash_defined
5474 && h->root.type != bfd_link_hash_defweak)
5475 || htab->srelbss == NULL)
5478 rel.r_offset = (h->root.u.def.value
5479 + h->root.u.def.section->output_section->vma
5480 + h->root.u.def.section->output_offset);
5481 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
5482 elf_append_rel (output_bfd, htab->srelbss, &rel);
5488 /* Finish up local dynamic symbol handling. We set the contents of
5489 various dynamic sections here. */
5492 elf_i386_finish_local_dynamic_symbol (void **slot, void *inf)
5494 struct elf_link_hash_entry *h
5495 = (struct elf_link_hash_entry *) *slot;
5496 struct bfd_link_info *info
5497 = (struct bfd_link_info *) inf;
5499 return elf_i386_finish_dynamic_symbol (info->output_bfd, info,
5503 /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry
5504 here since undefined weak symbol may not be dynamic and may not be
5505 called for elf_i386_finish_dynamic_symbol. */
5508 elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh,
5511 struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh;
5512 struct bfd_link_info *info = (struct bfd_link_info *) inf;
5514 if (h->root.type != bfd_link_hash_undefweak
5515 || h->dynindx != -1)
5518 return elf_i386_finish_dynamic_symbol (info->output_bfd,
5522 /* Used to decide how to sort relocs in an optimal manner for the
5523 dynamic linker, before writing them out. */
5525 static enum elf_reloc_type_class
5526 elf_i386_reloc_type_class (const struct bfd_link_info *info,
5527 const asection *rel_sec ATTRIBUTE_UNUSED,
5528 const Elf_Internal_Rela *rela)
5530 bfd *abfd = info->output_bfd;
5531 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
5532 struct elf_link_hash_table *htab = elf_hash_table (info);
5534 if (htab->dynsym != NULL
5535 && htab->dynsym->contents != NULL)
5537 /* Check relocation against STT_GNU_IFUNC symbol if there are
5539 unsigned long r_symndx = ELF32_R_SYM (rela->r_info);
5540 Elf_Internal_Sym sym;
5541 if (!bed->s->swap_symbol_in (abfd,
5542 (htab->dynsym->contents
5543 + r_symndx * sizeof (Elf32_External_Sym)),
5547 if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
5548 return reloc_class_ifunc;
5551 switch (ELF32_R_TYPE (rela->r_info))
5553 case R_386_RELATIVE:
5554 return reloc_class_relative;
5555 case R_386_JUMP_SLOT:
5556 return reloc_class_plt;
5558 return reloc_class_copy;
5560 return reloc_class_normal;
5564 /* Finish up the dynamic sections. */
5567 elf_i386_finish_dynamic_sections (bfd *output_bfd,
5568 struct bfd_link_info *info)
5570 struct elf_i386_link_hash_table *htab;
5573 const struct elf_i386_backend_data *abed;
5575 htab = elf_i386_hash_table (info);
5579 dynobj = htab->elf.dynobj;
5580 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
5581 abed = get_elf_i386_backend_data (output_bfd);
5583 if (htab->elf.dynamic_sections_created)
5585 Elf32_External_Dyn *dyncon, *dynconend;
5587 if (sdyn == NULL || htab->elf.sgot == NULL)
5590 dyncon = (Elf32_External_Dyn *) sdyn->contents;
5591 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
5592 for (; dyncon < dynconend; dyncon++)
5594 Elf_Internal_Dyn dyn;
5597 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
5602 if (abed->is_vxworks
5603 && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn))
5608 s = htab->elf.sgotplt;
5609 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5613 s = htab->elf.srelplt;
5614 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
5618 s = htab->elf.srelplt;
5619 dyn.d_un.d_val = s->size;
5623 /* My reading of the SVR4 ABI indicates that the
5624 procedure linkage table relocs (DT_JMPREL) should be
5625 included in the overall relocs (DT_REL). This is
5626 what Solaris does. However, UnixWare can not handle
5627 that case. Therefore, we override the DT_RELSZ entry
5628 here to make it not include the JMPREL relocs. */
5629 s = htab->elf.srelplt;
5632 dyn.d_un.d_val -= s->size;
5636 /* We may not be using the standard ELF linker script.
5637 If .rel.plt is the first .rel section, we adjust
5638 DT_REL to not include it. */
5639 s = htab->elf.srelplt;
5642 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
5644 dyn.d_un.d_ptr += s->size;
5648 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
5651 /* Fill in the first entry in the procedure linkage table. */
5652 if (htab->elf.splt && htab->elf.splt->size > 0)
5654 if (bfd_link_pic (info))
5656 memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry,
5657 abed->plt->plt0_entry_size);
5658 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5659 abed->plt0_pad_byte,
5660 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5664 memcpy (htab->elf.splt->contents, abed->plt->plt0_entry,
5665 abed->plt->plt0_entry_size);
5666 memset (htab->elf.splt->contents + abed->plt->plt0_entry_size,
5667 abed->plt0_pad_byte,
5668 abed->plt->plt_entry_size - abed->plt->plt0_entry_size);
5669 bfd_put_32 (output_bfd,
5670 (htab->elf.sgotplt->output_section->vma
5671 + htab->elf.sgotplt->output_offset
5673 htab->elf.splt->contents
5674 + abed->plt->plt0_got1_offset);
5675 bfd_put_32 (output_bfd,
5676 (htab->elf.sgotplt->output_section->vma
5677 + htab->elf.sgotplt->output_offset
5679 htab->elf.splt->contents
5680 + abed->plt->plt0_got2_offset);
5682 if (abed->is_vxworks)
5684 Elf_Internal_Rela rel;
5686 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
5687 On IA32 we use REL relocations so the addend goes in
5688 the PLT directly. */
5689 rel.r_offset = (htab->elf.splt->output_section->vma
5690 + htab->elf.splt->output_offset
5691 + abed->plt->plt0_got1_offset);
5692 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5693 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5694 htab->srelplt2->contents);
5695 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
5696 rel.r_offset = (htab->elf.splt->output_section->vma
5697 + htab->elf.splt->output_offset
5698 + abed->plt->plt0_got2_offset);
5699 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5700 bfd_elf32_swap_reloc_out (output_bfd, &rel,
5701 htab->srelplt2->contents +
5702 sizeof (Elf32_External_Rel));
5706 /* UnixWare sets the entsize of .plt to 4, although that doesn't
5707 really seem like the right value. */
5708 elf_section_data (htab->elf.splt->output_section)
5709 ->this_hdr.sh_entsize = 4;
5711 /* Correct the .rel.plt.unloaded relocations. */
5712 if (abed->is_vxworks && !bfd_link_pic (info))
5714 int num_plts = (htab->elf.splt->size
5715 / abed->plt->plt_entry_size) - 1;
5718 p = htab->srelplt2->contents;
5719 if (bfd_link_pic (info))
5720 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
5722 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
5724 for (; num_plts; num_plts--)
5726 Elf_Internal_Rela rel;
5727 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5728 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
5729 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5730 p += sizeof (Elf32_External_Rel);
5732 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
5733 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
5734 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
5735 p += sizeof (Elf32_External_Rel);
5741 if (htab->elf.sgotplt)
5743 if (bfd_is_abs_section (htab->elf.sgotplt->output_section))
5745 (*_bfd_error_handler)
5746 (_("discarded output section: `%A'"), htab->elf.sgotplt);
5750 /* Fill in the first three entries in the global offset table. */
5751 if (htab->elf.sgotplt->size > 0)
5753 bfd_put_32 (output_bfd,
5755 : sdyn->output_section->vma + sdyn->output_offset),
5756 htab->elf.sgotplt->contents);
5757 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4);
5758 bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8);
5761 elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4;
5764 /* Adjust .eh_frame for .plt section. */
5765 if (htab->plt_eh_frame != NULL
5766 && htab->plt_eh_frame->contents != NULL)
5768 if (htab->elf.splt != NULL
5769 && htab->elf.splt->size != 0
5770 && (htab->elf.splt->flags & SEC_EXCLUDE) == 0
5771 && htab->elf.splt->output_section != NULL
5772 && htab->plt_eh_frame->output_section != NULL)
5774 bfd_vma plt_start = htab->elf.splt->output_section->vma;
5775 bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma
5776 + htab->plt_eh_frame->output_offset
5777 + PLT_FDE_START_OFFSET;
5778 bfd_put_signed_32 (dynobj, plt_start - eh_frame_start,
5779 htab->plt_eh_frame->contents
5780 + PLT_FDE_START_OFFSET);
5782 if (htab->plt_eh_frame->sec_info_type
5783 == SEC_INFO_TYPE_EH_FRAME)
5785 if (! _bfd_elf_write_section_eh_frame (output_bfd, info,
5787 htab->plt_eh_frame->contents))
5792 if (htab->elf.sgot && htab->elf.sgot->size > 0)
5793 elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4;
5795 /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */
5796 htab_traverse (htab->loc_hash_table,
5797 elf_i386_finish_local_dynamic_symbol,
5800 /* Fill PLT entries for undefined weak symbols in PIE. */
5801 if (bfd_link_pie (info))
5802 bfd_hash_traverse (&info->hash->table,
5803 elf_i386_pie_finish_undefweak_symbol,
5809 /* Return an array of PLT entry symbol values. */
5812 elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt,
5815 bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean);
5818 bfd_vma *plt_sym_val;
5820 bfd_byte *plt_contents;
5821 const struct elf_i386_backend_data *bed
5822 = get_elf_i386_backend_data (abfd);
5823 Elf_Internal_Shdr *hdr;
5825 /* Get the .plt section contents. */
5826 plt_contents = (bfd_byte *) bfd_malloc (plt->size);
5827 if (plt_contents == NULL)
5829 if (!bfd_get_section_contents (abfd, (asection *) plt,
5830 plt_contents, 0, plt->size))
5833 free (plt_contents);
5837 slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table;
5838 if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE))
5841 hdr = &elf_section_data (relplt)->this_hdr;
5842 count = relplt->size / hdr->sh_entsize;
5844 plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count);
5845 if (plt_sym_val == NULL)
5848 for (i = 0; i < count; i++)
5849 plt_sym_val[i] = -1;
5851 plt_offset = bed->plt->plt_entry_size;
5852 p = relplt->relocation;
5853 for (i = 0; i < count; i++, p++)
5857 /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */
5858 if (p->howto == NULL)
5861 if (p->howto->type != R_386_JUMP_SLOT
5862 && p->howto->type != R_386_IRELATIVE)
5865 reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset
5866 + bed->plt->plt_reloc_offset));
5867 reloc_index /= sizeof (Elf32_External_Rel);
5868 if (reloc_index < count)
5869 plt_sym_val[reloc_index] = plt->vma + plt_offset;
5871 plt_offset += bed->plt->plt_entry_size;
5873 /* PR binutils/18437: Skip extra relocations in the .rel.plt
5875 if (plt_offset >= plt->size)
5879 free (plt_contents);
5884 /* Similar to _bfd_elf_get_synthetic_symtab. */
5887 elf_i386_get_synthetic_symtab (bfd *abfd,
5894 asection *plt = bfd_get_section_by_name (abfd, ".plt");
5895 return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms,
5896 dynsymcount, dynsyms, ret,
5898 elf_i386_get_plt_sym_val);
5901 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
5904 elf_i386_hash_symbol (struct elf_link_hash_entry *h)
5906 if (h->plt.offset != (bfd_vma) -1
5908 && !h->pointer_equality_needed)
5911 return _bfd_elf_hash_symbol (h);
5914 /* Hook called by the linker routine which adds symbols from an object
5918 elf_i386_add_symbol_hook (bfd * abfd,
5919 struct bfd_link_info * info,
5920 Elf_Internal_Sym * sym,
5921 const char ** namep ATTRIBUTE_UNUSED,
5922 flagword * flagsp ATTRIBUTE_UNUSED,
5923 asection ** secp ATTRIBUTE_UNUSED,
5924 bfd_vma * valp ATTRIBUTE_UNUSED)
5926 if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE
5927 && (abfd->flags & DYNAMIC) == 0
5928 && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour)
5929 elf_tdata (info->output_bfd)->has_gnu_symbols
5930 |= elf_gnu_symbol_unique;
5935 #define TARGET_LITTLE_SYM i386_elf32_vec
5936 #define TARGET_LITTLE_NAME "elf32-i386"
5937 #define ELF_ARCH bfd_arch_i386
5938 #define ELF_TARGET_ID I386_ELF_DATA
5939 #define ELF_MACHINE_CODE EM_386
5940 #define ELF_MAXPAGESIZE 0x1000
5942 #define elf_backend_can_gc_sections 1
5943 #define elf_backend_can_refcount 1
5944 #define elf_backend_want_got_plt 1
5945 #define elf_backend_plt_readonly 1
5946 #define elf_backend_want_plt_sym 0
5947 #define elf_backend_got_header_size 12
5948 #define elf_backend_plt_alignment 4
5949 #define elf_backend_extern_protected_data 1
5951 /* Support RELA for objdump of prelink objects. */
5952 #define elf_info_to_howto elf_i386_info_to_howto_rel
5953 #define elf_info_to_howto_rel elf_i386_info_to_howto_rel
5955 #define bfd_elf32_mkobject elf_i386_mkobject
5957 #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
5958 #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
5959 #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
5960 #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup
5961 #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab
5963 #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
5964 #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible
5965 #define elf_backend_check_relocs elf_i386_check_relocs
5966 #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
5967 #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
5968 #define elf_backend_fake_sections elf_i386_fake_sections
5969 #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
5970 #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
5971 #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
5972 #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
5973 #define elf_backend_grok_prstatus elf_i386_grok_prstatus
5974 #define elf_backend_grok_psinfo elf_i386_grok_psinfo
5975 #define elf_backend_reloc_type_class elf_i386_reloc_type_class
5976 #define elf_backend_relocate_section elf_i386_relocate_section
5977 #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
5978 #define elf_backend_always_size_sections elf_i386_always_size_sections
5979 #define elf_backend_omit_section_dynsym \
5980 ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true)
5981 #define elf_backend_hash_symbol elf_i386_hash_symbol
5982 #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook
5983 #define elf_backend_fixup_symbol elf_i386_fixup_symbol
5985 #include "elf32-target.h"
5987 /* FreeBSD support. */
5989 #undef TARGET_LITTLE_SYM
5990 #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec
5991 #undef TARGET_LITTLE_NAME
5992 #define TARGET_LITTLE_NAME "elf32-i386-freebsd"
5994 #define ELF_OSABI ELFOSABI_FREEBSD
5996 /* The kernel recognizes executables as valid only if they carry a
5997 "FreeBSD" label in the ELF header. So we put this label on all
5998 executables and (for simplicity) also all other object files. */
6001 elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
6003 _bfd_elf_post_process_headers (abfd, info);
6005 #ifdef OLD_FREEBSD_ABI_LABEL
6007 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
6008 Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
6009 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
6014 #undef elf_backend_post_process_headers
6015 #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers
6017 #define elf32_bed elf32_i386_fbsd_bed
6019 #undef elf_backend_add_symbol_hook
6021 #include "elf32-target.h"
6025 #undef TARGET_LITTLE_SYM
6026 #define TARGET_LITTLE_SYM i386_elf32_sol2_vec
6027 #undef TARGET_LITTLE_NAME
6028 #define TARGET_LITTLE_NAME "elf32-i386-sol2"
6030 #undef elf_backend_post_process_headers
6032 /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE
6033 objects won't be recognized. */
6037 #define elf32_bed elf32_i386_sol2_bed
6039 /* The 32-bit static TLS arena size is rounded to the nearest 8-byte
6041 #undef elf_backend_static_tls_alignment
6042 #define elf_backend_static_tls_alignment 8
6044 /* The Solaris 2 ABI requires a plt symbol on all platforms.
6046 Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output
6048 #undef elf_backend_want_plt_sym
6049 #define elf_backend_want_plt_sym 1
6051 #include "elf32-target.h"
6053 /* Intel MCU support. */
6056 elf32_iamcu_elf_object_p (bfd *abfd)
6058 /* Set the right machine number for an IAMCU elf32 file. */
6059 bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu);
6063 #undef TARGET_LITTLE_SYM
6064 #define TARGET_LITTLE_SYM iamcu_elf32_vec
6065 #undef TARGET_LITTLE_NAME
6066 #define TARGET_LITTLE_NAME "elf32-iamcu"
6068 #define ELF_ARCH bfd_arch_iamcu
6070 #undef ELF_MACHINE_CODE
6071 #define ELF_MACHINE_CODE EM_IAMCU
6076 #define elf32_bed elf32_iamcu_bed
6078 #undef elf_backend_object_p
6079 #define elf_backend_object_p elf32_iamcu_elf_object_p
6081 #undef elf_backend_static_tls_alignment
6083 #undef elf_backend_want_plt_sym
6084 #define elf_backend_want_plt_sym 0
6086 #include "elf32-target.h"
6088 /* Restore defaults. */
6090 #define ELF_ARCH bfd_arch_i386
6091 #undef ELF_MACHINE_CODE
6092 #define ELF_MACHINE_CODE EM_386
6094 /* Native Client support. */
6096 #undef TARGET_LITTLE_SYM
6097 #define TARGET_LITTLE_SYM i386_elf32_nacl_vec
6098 #undef TARGET_LITTLE_NAME
6099 #define TARGET_LITTLE_NAME "elf32-i386-nacl"
6101 #define elf32_bed elf32_i386_nacl_bed
6103 #undef ELF_MAXPAGESIZE
6104 #define ELF_MAXPAGESIZE 0x10000
6106 /* Restore defaults. */
6108 #undef elf_backend_want_plt_sym
6109 #define elf_backend_want_plt_sym 0
6110 #undef elf_backend_post_process_headers
6111 #undef elf_backend_static_tls_alignment
6113 /* NaCl uses substantially different PLT entries for the same effects. */
6115 #undef elf_backend_plt_alignment
6116 #define elf_backend_plt_alignment 5
6117 #define NACL_PLT_ENTRY_SIZE 64
6118 #define NACLMASK 0xe0 /* 32-byte alignment mask. */
6120 static const bfd_byte elf_i386_nacl_plt0_entry[] =
6122 0xff, 0x35, /* pushl contents of address */
6123 0, 0, 0, 0, /* replaced with address of .got + 4. */
6124 0x8b, 0x0d, /* movl contents of address, %ecx */
6125 0, 0, 0, 0, /* replaced with address of .got + 8. */
6126 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6127 0xff, 0xe1 /* jmp *%ecx */
6130 static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
6132 0x8b, 0x0d, /* movl contents of address, %ecx */
6133 0, 0, 0, 0, /* replaced with GOT slot address. */
6134 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */
6135 0xff, 0xe1, /* jmp *%ecx */
6137 /* Pad to the next 32-byte boundary with nop instructions. */
6139 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6140 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6142 /* Lazy GOT entries point here (32-byte aligned). */
6143 0x68, /* pushl immediate */
6144 0, 0, 0, 0, /* replaced with reloc offset. */
6145 0xe9, /* jmp relative */
6146 0, 0, 0, 0, /* replaced with offset to .plt. */
6148 /* Pad to the next 32-byte boundary with nop instructions. */
6149 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6150 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6154 static const bfd_byte
6155 elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
6157 0xff, 0x73, 0x04, /* pushl 4(%ebx) */
6158 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */
6159 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */
6160 0xff, 0xe1, /* jmp *%ecx */
6162 /* This is expected to be the same size as elf_i386_nacl_plt0_entry,
6163 so pad to that size with nop instructions. */
6164 0x90, 0x90, 0x90, 0x90, 0x90, 0x90
6167 static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
6169 0x8b, 0x8b, /* movl offset(%ebx), %ecx */
6170 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
6171 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */
6172 0xff, 0xe1, /* jmp *%ecx */
6174 /* Pad to the next 32-byte boundary with nop instructions. */
6176 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6177 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6179 /* Lazy GOT entries point here (32-byte aligned). */
6180 0x68, /* pushl immediate */
6181 0, 0, 0, 0, /* replaced with offset into relocation table. */
6182 0xe9, /* jmp relative */
6183 0, 0, 0, 0, /* replaced with offset to start of .plt. */
6185 /* Pad to the next 32-byte boundary with nop instructions. */
6186 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6187 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
6191 static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
6193 #if (PLT_CIE_LENGTH != 20 \
6194 || PLT_FDE_LENGTH != 36 \
6195 || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \
6196 || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
6197 # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
6199 PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */
6200 0, 0, 0, 0, /* CIE ID */
6201 1, /* CIE version */
6202 'z', 'R', 0, /* Augmentation string */
6203 1, /* Code alignment factor */
6204 0x7c, /* Data alignment factor: -4 */
6205 8, /* Return address column */
6206 1, /* Augmentation size */
6207 DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */
6208 DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
6209 DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */
6210 DW_CFA_nop, DW_CFA_nop,
6212 PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */
6213 PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
6214 0, 0, 0, 0, /* R_386_PC32 .plt goes here */
6215 0, 0, 0, 0, /* .plt size goes here */
6216 0, /* Augmentation size */
6217 DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */
6218 DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */
6219 DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */
6220 DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */
6221 DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */
6222 13, /* Block length */
6223 DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */
6224 DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */
6225 DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
6226 DW_OP_lit2, DW_OP_shl, DW_OP_plus,
6227 DW_CFA_nop, DW_CFA_nop
6230 static const struct elf_i386_plt_layout elf_i386_nacl_plt =
6232 elf_i386_nacl_plt0_entry, /* plt0_entry */
6233 sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
6234 2, /* plt0_got1_offset */
6235 8, /* plt0_got2_offset */
6236 elf_i386_nacl_plt_entry, /* plt_entry */
6237 NACL_PLT_ENTRY_SIZE, /* plt_entry_size */
6238 2, /* plt_got_offset */
6239 33, /* plt_reloc_offset */
6240 38, /* plt_plt_offset */
6241 32, /* plt_lazy_offset */
6242 elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */
6243 elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */
6244 elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */
6245 sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
6248 static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
6250 &elf_i386_nacl_plt, /* plt */
6251 0x90, /* plt0_pad_byte: nop insn */
6256 elf32_i386_nacl_elf_object_p (bfd *abfd)
6258 /* Set the right machine number for a NaCl i386 ELF32 file. */
6259 bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl);
6263 #undef elf_backend_arch_data
6264 #define elf_backend_arch_data &elf_i386_nacl_arch_bed
6266 #undef elf_backend_object_p
6267 #define elf_backend_object_p elf32_i386_nacl_elf_object_p
6268 #undef elf_backend_modify_segment_map
6269 #define elf_backend_modify_segment_map nacl_modify_segment_map
6270 #undef elf_backend_modify_program_headers
6271 #define elf_backend_modify_program_headers nacl_modify_program_headers
6272 #undef elf_backend_final_write_processing
6273 #define elf_backend_final_write_processing nacl_final_write_processing
6275 #include "elf32-target.h"
6277 /* Restore defaults. */
6278 #undef elf_backend_object_p
6279 #undef elf_backend_modify_segment_map
6280 #undef elf_backend_modify_program_headers
6281 #undef elf_backend_final_write_processing
6283 /* VxWorks support. */
6285 #undef TARGET_LITTLE_SYM
6286 #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec
6287 #undef TARGET_LITTLE_NAME
6288 #define TARGET_LITTLE_NAME "elf32-i386-vxworks"
6290 #undef elf_backend_plt_alignment
6291 #define elf_backend_plt_alignment 4
6293 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
6295 &elf_i386_plt, /* plt */
6296 0x90, /* plt0_pad_byte */
6300 #undef elf_backend_arch_data
6301 #define elf_backend_arch_data &elf_i386_vxworks_arch_bed
6303 #undef elf_backend_relocs_compatible
6304 #undef elf_backend_add_symbol_hook
6305 #define elf_backend_add_symbol_hook \
6306 elf_vxworks_add_symbol_hook
6307 #undef elf_backend_link_output_symbol_hook
6308 #define elf_backend_link_output_symbol_hook \
6309 elf_vxworks_link_output_symbol_hook
6310 #undef elf_backend_emit_relocs
6311 #define elf_backend_emit_relocs elf_vxworks_emit_relocs
6312 #undef elf_backend_final_write_processing
6313 #define elf_backend_final_write_processing \
6314 elf_vxworks_final_write_processing
6315 #undef elf_backend_static_tls_alignment
6317 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
6319 #undef elf_backend_want_plt_sym
6320 #define elf_backend_want_plt_sym 1
6323 #define elf32_bed elf32_i386_vxworks_bed
6325 #include "elf32-target.h"