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[deliverable/binutils-gdb.git] / bfd / elf32-i386.c
CommitLineData
252b5132 1/* Intel 80386/80486-specific support for 32-bit ELF
b2a8e766 2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
67a4f2b7 3 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
252b5132 4
571fe01f 5 This file is part of BFD, the Binary File Descriptor library.
252b5132 6
571fe01f
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
252b5132 11
571fe01f
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
252b5132 16
571fe01f
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
252b5132
RH		 20
21#include "bfd.h"
22#include "sysdep.h"
23#include "bfdlink.h"
24#include "libbfd.h"
25#include "elf-bfd.h"
eac338cf 26#include "elf-vxworks.h"
252b5132 27
55fd94b0
AM		 28/* 386 uses REL relocations instead of RELA. */
29#define USE_REL 1
252b5132
RH		 30
31#include "elf/i386.h"
32
33static reloc_howto_type elf_howto_table[]=
34{
b34976b6 35 HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield,
1b452ec6 36 bfd_elf_generic_reloc, "R_386_NONE",
b34976b6
AM		 37 TRUE, 0x00000000, 0x00000000, FALSE),
38 HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 39 bfd_elf_generic_reloc, "R_386_32",
b34976b6
AM		 40 TRUE, 0xffffffff, 0xffffffff, FALSE),
41 HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 42 bfd_elf_generic_reloc, "R_386_PC32",
b34976b6
AM		 43 TRUE, 0xffffffff, 0xffffffff, TRUE),
44 HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 45 bfd_elf_generic_reloc, "R_386_GOT32",
b34976b6
AM		 46 TRUE, 0xffffffff, 0xffffffff, FALSE),
47 HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 48 bfd_elf_generic_reloc, "R_386_PLT32",
b34976b6
AM		 49 TRUE, 0xffffffff, 0xffffffff, TRUE),
50 HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 51 bfd_elf_generic_reloc, "R_386_COPY",
b34976b6
AM		 52 TRUE, 0xffffffff, 0xffffffff, FALSE),
53 HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 54 bfd_elf_generic_reloc, "R_386_GLOB_DAT",
b34976b6
AM		 55 TRUE, 0xffffffff, 0xffffffff, FALSE),
56 HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 57 bfd_elf_generic_reloc, "R_386_JUMP_SLOT",
b34976b6
AM		 58 TRUE, 0xffffffff, 0xffffffff, FALSE),
59 HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 60 bfd_elf_generic_reloc, "R_386_RELATIVE",
b34976b6
AM		 61 TRUE, 0xffffffff, 0xffffffff, FALSE),
62 HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
1b452ec6 63 bfd_elf_generic_reloc, "R_386_GOTOFF",
b34976b6
AM		 64 TRUE, 0xffffffff, 0xffffffff, FALSE),
65 HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
1b452ec6 66 bfd_elf_generic_reloc, "R_386_GOTPC",
b34976b6 67 TRUE, 0xffffffff, 0xffffffff, TRUE),
1b452ec6 68
dc47f327
AM		 69 /* We have a gap in the reloc numbers here.
70 R_386_standard counts the number up to this point, and
71 R_386_ext_offset is the value to subtract from a reloc type of
72 R_386_16 thru R_386_PC8 to form an index into this table. */
55fd94b0
AM		 73#define R_386_standard (R_386_GOTPC + 1)
74#define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard)
1b452ec6 75
37e55690 76 /* These relocs are a GNU extension. */
b34976b6 77 HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 78 bfd_elf_generic_reloc, "R_386_TLS_TPOFF",
b34976b6
AM		 79 TRUE, 0xffffffff, 0xffffffff, FALSE),
80 HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 81 bfd_elf_generic_reloc, "R_386_TLS_IE",
b34976b6
AM		 82 TRUE, 0xffffffff, 0xffffffff, FALSE),
83 HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
37e55690 84 bfd_elf_generic_reloc, "R_386_TLS_GOTIE",
b34976b6
AM		 85 TRUE, 0xffffffff, 0xffffffff, FALSE),
86 HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 87 bfd_elf_generic_reloc, "R_386_TLS_LE",
b34976b6
AM		 88 TRUE, 0xffffffff, 0xffffffff, FALSE),
89 HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 90 bfd_elf_generic_reloc, "R_386_TLS_GD",
b34976b6
AM		 91 TRUE, 0xffffffff, 0xffffffff, FALSE),
92 HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 93 bfd_elf_generic_reloc, "R_386_TLS_LDM",
b34976b6
AM		 94 TRUE, 0xffffffff, 0xffffffff, FALSE),
95 HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
1b452ec6 96 bfd_elf_generic_reloc, "R_386_16",
b34976b6 97 TRUE, 0xffff, 0xffff, FALSE),
b0360d8c 98 HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
1b452ec6 99 bfd_elf_generic_reloc, "R_386_PC16",
b34976b6
AM		 100 TRUE, 0xffff, 0xffff, TRUE),
101 HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
1b452ec6 102 bfd_elf_generic_reloc, "R_386_8",
b34976b6
AM		 103 TRUE, 0xff, 0xff, FALSE),
104 HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed,
1b452ec6 105 bfd_elf_generic_reloc, "R_386_PC8",
b34976b6 106 TRUE, 0xff, 0xff, TRUE),
dc47f327 107
55fd94b0
AM		 108#define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset)
109#define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext)
13ae64f3 110 /* These are common with Solaris TLS implementation. */
b34976b6 111 HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 112 bfd_elf_generic_reloc, "R_386_TLS_LDO_32",
b34976b6
AM		 113 TRUE, 0xffffffff, 0xffffffff, FALSE),
114 HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 115 bfd_elf_generic_reloc, "R_386_TLS_IE_32",
b34976b6
AM		 116 TRUE, 0xffffffff, 0xffffffff, FALSE),
117 HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 118 bfd_elf_generic_reloc, "R_386_TLS_LE_32",
b34976b6
AM		 119 TRUE, 0xffffffff, 0xffffffff, FALSE),
120 HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 121 bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32",
b34976b6
AM		 122 TRUE, 0xffffffff, 0xffffffff, FALSE),
123 HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 124 bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32",
b34976b6
AM		 125 TRUE, 0xffffffff, 0xffffffff, FALSE),
126 HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
13ae64f3 127 bfd_elf_generic_reloc, "R_386_TLS_TPOFF32",
b34976b6 128 TRUE, 0xffffffff, 0xffffffff, FALSE),
67a4f2b7
AO		 129 EMPTY_HOWTO (38),
130 HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_386_TLS_GOTDESC",
132 TRUE, 0xffffffff, 0xffffffff, FALSE),
133 HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL",
135 FALSE, 0, 0, FALSE),
136 HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_386_TLS_DESC",
138 TRUE, 0xffffffff, 0xffffffff, FALSE),
13ae64f3
JJ		 139
140 /* Another gap. */
67a4f2b7 141#define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset)
55fd94b0 142#define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls)
252b5132
RH		 143
144/* GNU extension to record C++ vtable hierarchy. */
252b5132
RH		 145 HOWTO (R_386_GNU_VTINHERIT, /* type */
146 0, /* rightshift */
147 2, /* size (0 = byte, 1 = short, 2 = long) */
148 0, /* bitsize */
b34976b6 149 FALSE, /* pc_relative */
252b5132
RH		 150 0, /* bitpos */
151 complain_overflow_dont, /* complain_on_overflow */
152 NULL, /* special_function */
153 "R_386_GNU_VTINHERIT", /* name */
b34976b6 154 FALSE, /* partial_inplace */
252b5132
RH		 155 0, /* src_mask */
156 0, /* dst_mask */
b34976b6 157 FALSE), /* pcrel_offset */
252b5132
RH		 158
159/* GNU extension to record C++ vtable member usage. */
252b5132
RH		 160 HOWTO (R_386_GNU_VTENTRY, /* type */
161 0, /* rightshift */
162 2, /* size (0 = byte, 1 = short, 2 = long) */
163 0, /* bitsize */
b34976b6 164 FALSE, /* pc_relative */
252b5132
RH		 165 0, /* bitpos */
166 complain_overflow_dont, /* complain_on_overflow */
167 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
168 "R_386_GNU_VTENTRY", /* name */
b34976b6 169 FALSE, /* partial_inplace */
252b5132
RH		 170 0, /* src_mask */
171 0, /* dst_mask */
b34976b6 172 FALSE) /* pcrel_offset */
dc47f327 173
55fd94b0 174#define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset)
dc47f327
AM		 175
176};
177
252b5132 178#ifdef DEBUG_GEN_RELOC
55fd94b0
AM		 179#define TRACE(str) \
180 fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str)
252b5132
RH		 181#else
182#define TRACE(str)
183#endif
184
185static reloc_howto_type *
55fd94b0
AM		 186elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
187 bfd_reloc_code_real_type code)
252b5132
RH		 188{
189 switch (code)
190 {
191 case BFD_RELOC_NONE:
192 TRACE ("BFD_RELOC_NONE");
55fd94b0 193 return &elf_howto_table[R_386_NONE];
252b5132
RH		 194
195 case BFD_RELOC_32:
196 TRACE ("BFD_RELOC_32");
55fd94b0 197 return &elf_howto_table[R_386_32];
252b5132
RH		 198
199 case BFD_RELOC_CTOR:
200 TRACE ("BFD_RELOC_CTOR");
55fd94b0 201 return &elf_howto_table[R_386_32];
252b5132
RH		 202
203 case BFD_RELOC_32_PCREL:
204 TRACE ("BFD_RELOC_PC32");
55fd94b0 205 return &elf_howto_table[R_386_PC32];
252b5132
RH		 206
207 case BFD_RELOC_386_GOT32:
208 TRACE ("BFD_RELOC_386_GOT32");
55fd94b0 209 return &elf_howto_table[R_386_GOT32];
252b5132
RH		 210
211 case BFD_RELOC_386_PLT32:
212 TRACE ("BFD_RELOC_386_PLT32");
55fd94b0 213 return &elf_howto_table[R_386_PLT32];
252b5132
RH		 214
215 case BFD_RELOC_386_COPY:
216 TRACE ("BFD_RELOC_386_COPY");
55fd94b0 217 return &elf_howto_table[R_386_COPY];
252b5132
RH		 218
219 case BFD_RELOC_386_GLOB_DAT:
220 TRACE ("BFD_RELOC_386_GLOB_DAT");
55fd94b0 221 return &elf_howto_table[R_386_GLOB_DAT];
252b5132
RH		 222
223 case BFD_RELOC_386_JUMP_SLOT:
224 TRACE ("BFD_RELOC_386_JUMP_SLOT");
55fd94b0 225 return &elf_howto_table[R_386_JUMP_SLOT];
252b5132
RH		 226
227 case BFD_RELOC_386_RELATIVE:
228 TRACE ("BFD_RELOC_386_RELATIVE");
55fd94b0 229 return &elf_howto_table[R_386_RELATIVE];
252b5132
RH		 230
231 case BFD_RELOC_386_GOTOFF:
232 TRACE ("BFD_RELOC_386_GOTOFF");
55fd94b0 233 return &elf_howto_table[R_386_GOTOFF];
252b5132
RH		 234
235 case BFD_RELOC_386_GOTPC:
236 TRACE ("BFD_RELOC_386_GOTPC");
55fd94b0 237 return &elf_howto_table[R_386_GOTPC];
252b5132 238
37e55690
JJ		 239 /* These relocs are a GNU extension. */
240 case BFD_RELOC_386_TLS_TPOFF:
241 TRACE ("BFD_RELOC_386_TLS_TPOFF");
55fd94b0 242 return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset];
37e55690
JJ		 243
244 case BFD_RELOC_386_TLS_IE:
245 TRACE ("BFD_RELOC_386_TLS_IE");
55fd94b0 246 return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset];
37e55690
JJ		 247
248 case BFD_RELOC_386_TLS_GOTIE:
249 TRACE ("BFD_RELOC_386_TLS_GOTIE");
55fd94b0 250 return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset];
37e55690 251
13ae64f3
JJ		 252 case BFD_RELOC_386_TLS_LE:
253 TRACE ("BFD_RELOC_386_TLS_LE");
55fd94b0 254 return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset];
13ae64f3
JJ		 255
256 case BFD_RELOC_386_TLS_GD:
257 TRACE ("BFD_RELOC_386_TLS_GD");
55fd94b0 258 return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset];
13ae64f3
JJ		 259
260 case BFD_RELOC_386_TLS_LDM:
261 TRACE ("BFD_RELOC_386_TLS_LDM");
55fd94b0 262 return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset];
13ae64f3 263
252b5132
RH		 264 case BFD_RELOC_16:
265 TRACE ("BFD_RELOC_16");
55fd94b0 266 return &elf_howto_table[R_386_16 - R_386_ext_offset];
252b5132
RH		 267
268 case BFD_RELOC_16_PCREL:
269 TRACE ("BFD_RELOC_16_PCREL");
55fd94b0 270 return &elf_howto_table[R_386_PC16 - R_386_ext_offset];
252b5132
RH		 271
272 case BFD_RELOC_8:
273 TRACE ("BFD_RELOC_8");
55fd94b0 274 return &elf_howto_table[R_386_8 - R_386_ext_offset];
252b5132
RH		 275
276 case BFD_RELOC_8_PCREL:
277 TRACE ("BFD_RELOC_8_PCREL");
55fd94b0 278 return &elf_howto_table[R_386_PC8 - R_386_ext_offset];
252b5132 279
13ae64f3
JJ		 280 /* Common with Sun TLS implementation. */
281 case BFD_RELOC_386_TLS_LDO_32:
282 TRACE ("BFD_RELOC_386_TLS_LDO_32");
55fd94b0 283 return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset];
13ae64f3
JJ		 284
285 case BFD_RELOC_386_TLS_IE_32:
286 TRACE ("BFD_RELOC_386_TLS_IE_32");
55fd94b0 287 return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset];
13ae64f3
JJ		 288
289 case BFD_RELOC_386_TLS_LE_32:
290 TRACE ("BFD_RELOC_386_TLS_LE_32");
55fd94b0 291 return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset];
13ae64f3
JJ		 292
293 case BFD_RELOC_386_TLS_DTPMOD32:
294 TRACE ("BFD_RELOC_386_TLS_DTPMOD32");
55fd94b0 295 return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset];
13ae64f3
JJ		 296
297 case BFD_RELOC_386_TLS_DTPOFF32:
298 TRACE ("BFD_RELOC_386_TLS_DTPOFF32");
55fd94b0 299 return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset];
13ae64f3
JJ		 300
301 case BFD_RELOC_386_TLS_TPOFF32:
302 TRACE ("BFD_RELOC_386_TLS_TPOFF32");
55fd94b0 303 return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset];
13ae64f3 304
67a4f2b7
AO		 305 case BFD_RELOC_386_TLS_GOTDESC:
306 TRACE ("BFD_RELOC_386_TLS_GOTDESC");
307 return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset];
308
309 case BFD_RELOC_386_TLS_DESC_CALL:
310 TRACE ("BFD_RELOC_386_TLS_DESC_CALL");
311 return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset];
312
313 case BFD_RELOC_386_TLS_DESC:
314 TRACE ("BFD_RELOC_386_TLS_DESC");
315 return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset];
316
252b5132
RH		 317 case BFD_RELOC_VTABLE_INHERIT:
318 TRACE ("BFD_RELOC_VTABLE_INHERIT");
55fd94b0 319 return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset];
252b5132
RH		 320
321 case BFD_RELOC_VTABLE_ENTRY:
322 TRACE ("BFD_RELOC_VTABLE_ENTRY");
55fd94b0 323 return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset];
252b5132
RH		 324
325 default:
326 break;
327 }
328
329 TRACE ("Unknown");
330 return 0;
331}
332
252b5132 333static void
55fd94b0
AM		 334elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
335 arelent *cache_ptr,
336 Elf_Internal_Rela *dst)
252b5132 337{
dc47f327
AM		 338 unsigned int r_type = ELF32_R_TYPE (dst->r_info);
339 unsigned int indx;
340
341 if ((indx = r_type) >= R_386_standard
342 && ((indx = r_type - R_386_ext_offset) - R_386_standard
343 >= R_386_ext - R_386_standard)
13ae64f3
JJ		 344 && ((indx = r_type - R_386_tls_offset) - R_386_ext
345 >= R_386_tls - R_386_ext)
346 && ((indx = r_type - R_386_vt_offset) - R_386_tls
347 >= R_386_vt - R_386_tls))
252b5132 348 {
d003868e
AM		 349 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
350 abfd, (int) r_type);
55fd94b0 351 indx = R_386_NONE;
252b5132 352 }
dc47f327 353 cache_ptr->howto = &elf_howto_table[indx];
252b5132
RH		 354}
355
356/* Return whether a symbol name implies a local label. The UnixWare
357 2.1 cc generates temporary symbols that start with .X, so we
358 recognize them here. FIXME: do other SVR4 compilers also use .X?.
359 If so, we should move the .X recognition into
360 _bfd_elf_is_local_label_name. */
361
b34976b6 362static bfd_boolean
55fd94b0 363elf_i386_is_local_label_name (bfd *abfd, const char *name)
252b5132
RH		 364{
365 if (name[0] == '.' && name[1] == 'X')
b34976b6 366 return TRUE;
252b5132
RH		 367
368 return _bfd_elf_is_local_label_name (abfd, name);
369}
370\f
38701953 371/* Support for core dump NOTE sections. */
61adc1a4 372
b34976b6 373static bfd_boolean
55fd94b0 374elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
38701953
AM		 375{
376 int offset;
eea6121a 377 size_t size;
38701953 378
61adc1a4 379 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 380 {
61adc1a4
NC		 381 int pr_version = bfd_get_32 (abfd, note->descdata);
382
383 if (pr_version != 1)
384 return FALSE;
385
386 /* pr_cursig */
387 elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20);
388
389 /* pr_pid */
390 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
391
392 /* pr_reg */
393 offset = 28;
eea6121a 394 size = bfd_get_32 (abfd, note->descdata + 8);
61adc1a4
NC		 395 }
396 else
397 {
398 switch (note->descsz)
399 {
400 default:
401 return FALSE;
38701953 402
61adc1a4
NC		 403 case 144: /* Linux/i386 */
404 /* pr_cursig */
405 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
38701953 406
61adc1a4
NC		 407 /* pr_pid */
408 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
38701953 409
61adc1a4
NC		 410 /* pr_reg */
411 offset = 72;
eea6121a 412 size = 68;
38701953 413
61adc1a4
NC		 414 break;
415 }
38701953
AM		 416 }
417
418 /* Make a ".reg/999" section. */
419 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
eea6121a 420 size, note->descpos + offset);
38701953
AM		 421}
422
b34976b6 423static bfd_boolean
55fd94b0 424elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
38701953 425{
61adc1a4 426 if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0)
38701953 427 {
61adc1a4
NC		 428 int pr_version = bfd_get_32 (abfd, note->descdata);
429
430 if (pr_version != 1)
b34976b6 431 return FALSE;
38701953 432
61adc1a4
NC		 433 elf_tdata (abfd)->core_program
434 = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17);
435 elf_tdata (abfd)->core_command
436 = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81);
437 }
438 else
439 {
440 switch (note->descsz)
441 {
442 default:
443 return FALSE;
444
445 case 124: /* Linux/i386 elf_prpsinfo. */
446 elf_tdata (abfd)->core_program
447 = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
448 elf_tdata (abfd)->core_command
449 = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
450 }
38701953
AM		 451 }
452
453 /* Note that for some reason, a spurious space is tacked
454 onto the end of the args in some (at least one anyway)
455 implementations, so strip it off if it exists. */
38701953
AM		 456 {
457 char *command = elf_tdata (abfd)->core_command;
458 int n = strlen (command);
459
460 if (0 < n && command[n - 1] == ' ')
461 command[n - 1] = '\0';
462 }
463
b34976b6 464 return TRUE;
38701953
AM		 465}
466\f
467/* Functions for the i386 ELF linker.
468
469 In order to gain some understanding of code in this file without
470 knowing all the intricate details of the linker, note the
471 following:
472
473 Functions named elf_i386_* are called by external routines, other
474 functions are only called locally. elf_i386_* functions appear
475 in this file more or less in the order in which they are called
476 from external routines. eg. elf_i386_check_relocs is called
477 early in the link process, elf_i386_finish_dynamic_sections is
478 one of the last functions. */
479
252b5132
RH		 480
481/* The name of the dynamic interpreter. This is put in the .interp
482 section. */
483
484#define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1"
485
a23b6845
AM		 486/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
487 copying dynamic variables from a shared lib into an app's dynbss
488 section, and instead use a dynamic relocation to point into the
489 shared lib. */
490#define ELIMINATE_COPY_RELOCS 1
491
252b5132
RH		 492/* The size in bytes of an entry in the procedure linkage table. */
493
494#define PLT_ENTRY_SIZE 16
495
496/* The first entry in an absolute procedure linkage table looks like
eac338cf
PB		 497 this. See the SVR4 ABI i386 supplement to see how this works.
498 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 499
eac338cf 500static const bfd_byte elf_i386_plt0_entry[12] =
252b5132
RH		 501{
502 0xff, 0x35, /* pushl contents of address */
503 0, 0, 0, 0, /* replaced with address of .got + 4. */
504 0xff, 0x25, /* jmp indirect */
eac338cf 505 0, 0, 0, 0 /* replaced with address of .got + 8. */
252b5132
RH		 506};
507
508/* Subsequent entries in an absolute procedure linkage table look like
509 this. */
510
511static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] =
512{
513 0xff, 0x25, /* jmp indirect */
514 0, 0, 0, 0, /* replaced with address of this symbol in .got. */
515 0x68, /* pushl immediate */
516 0, 0, 0, 0, /* replaced with offset into relocation table. */
517 0xe9, /* jmp relative */
518 0, 0, 0, 0 /* replaced with offset to start of .plt. */
519};
520
eac338cf
PB		 521/* The first entry in a PIC procedure linkage table look like this.
522 Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */
252b5132 523
eac338cf 524static const bfd_byte elf_i386_pic_plt0_entry[12] =
252b5132
RH		 525{
526 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */
eac338cf 527 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */
252b5132
RH		 528};
529
530/* Subsequent entries in a PIC procedure linkage table look like this. */
531
532static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] =
533{
534 0xff, 0xa3, /* jmp *offset(%ebx) */
535 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */
536 0x68, /* pushl immediate */
537 0, 0, 0, 0, /* replaced with offset into relocation table. */
538 0xe9, /* jmp relative */
539 0, 0, 0, 0 /* replaced with offset to start of .plt. */
540};
541
eac338cf
PB		 542/* On VxWorks, the .rel.plt.unloaded section has absolute relocations
543 for the PLTResolve stub and then for each PLT entry. */
544#define PLTRESOLVE_RELOCS_SHLIB 0
545#define PLTRESOLVE_RELOCS 2
546#define PLT_NON_JUMP_SLOT_RELOCS 2
547
252b5132 548/* The i386 linker needs to keep track of the number of relocs that it
ffb2e45b
AM		 549 decides to copy as dynamic relocs in check_relocs for each symbol.
550 This is so that it can later discard them if they are found to be
551 unnecessary. We store the information in a field extending the
552 regular ELF linker hash table. */
252b5132 553
ffb2e45b 554struct elf_i386_dyn_relocs
252b5132 555{
ffb2e45b 556 struct elf_i386_dyn_relocs *next;
0c715baa
AM		 557
558 /* The input section of the reloc. */
559 asection *sec;
560
561 /* Total number of relocs copied for the input section. */
252b5132 562 bfd_size_type count;
0c715baa
AM		 563
564 /* Number of pc-relative relocs copied for the input section. */
565 bfd_size_type pc_count;
252b5132
RH		 566};
567
568/* i386 ELF linker hash entry. */
569
570struct elf_i386_link_hash_entry
571{
ebe50bae 572 struct elf_link_hash_entry elf;
252b5132 573
0c715baa 574 /* Track dynamic relocs copied for this symbol. */
ffb2e45b 575 struct elf_i386_dyn_relocs *dyn_relocs;
13ae64f3 576
37e55690
JJ		 577#define GOT_UNKNOWN 0
578#define GOT_NORMAL 1
579#define GOT_TLS_GD 2
580#define GOT_TLS_IE 4
581#define GOT_TLS_IE_POS 5
582#define GOT_TLS_IE_NEG 6
583#define GOT_TLS_IE_BOTH 7
67a4f2b7 584#define GOT_TLS_GDESC 8
cb878726
L		 585#define GOT_TLS_MASK 0x0f
586#define GOT_TLS_IE_IE 0x10
587#define GOT_TLS_IE_GD 0x20
588#define GOT_TLS_IE_MASK 0x30
67a4f2b7
AO		 589#define GOT_TLS_GD_BOTH_P(type) \
590 ((type) == (GOT_TLS_GD | GOT_TLS_GDESC))
591#define GOT_TLS_GD_P(type) \
592 ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type))
593#define GOT_TLS_GDESC_P(type) \
594 ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type))
595#define GOT_TLS_GD_ANY_P(type) \
596 (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type))
37e55690 597 unsigned char tls_type;
67a4f2b7
AO		 598
599 /* Offset of the GOTPLT entry reserved for the TLS descriptor,
600 starting at the end of the jump table. */
601 bfd_vma tlsdesc_got;
13ae64f3
JJ		 602};
603
604#define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent))
605
606struct elf_i386_obj_tdata
607{
608 struct elf_obj_tdata root;
609
610 /* tls_type for each local got entry. */
611 char *local_got_tls_type;
67a4f2b7
AO		 612
613 /* GOTPLT entries for TLS descriptors. */
614 bfd_vma *local_tlsdesc_gotent;
252b5132
RH		 615};
616
13ae64f3
JJ		 617#define elf_i386_tdata(abfd) \
618 ((struct elf_i386_obj_tdata *) (abfd)->tdata.any)
619
620#define elf_i386_local_got_tls_type(abfd) \
621 (elf_i386_tdata (abfd)->local_got_tls_type)
622
67a4f2b7
AO		 623#define elf_i386_local_tlsdesc_gotent(abfd) \
624 (elf_i386_tdata (abfd)->local_tlsdesc_gotent)
625
b34976b6 626static bfd_boolean
55fd94b0 627elf_i386_mkobject (bfd *abfd)
13ae64f3 628{
13ae64f3 629 if (abfd->tdata.any == NULL)
62d7a5f6
AM		 630 {
631 bfd_size_type amt = sizeof (struct elf_i386_obj_tdata);
632 abfd->tdata.any = bfd_zalloc (abfd, amt);
633 if (abfd->tdata.any == NULL)
634 return FALSE;
635 }
636 return bfd_elf_mkobject (abfd);
13ae64f3 637}
cedb70c5 638
252b5132
RH		 639/* i386 ELF linker hash table. */
640
641struct elf_i386_link_hash_table
642{
ebe50bae 643 struct elf_link_hash_table elf;
252b5132 644
6725bdbf
AM		 645 /* Short-cuts to get to dynamic linker sections. */
646 asection *sgot;
647 asection *sgotplt;
648 asection *srelgot;
649 asection *splt;
650 asection *srelplt;
651 asection *sdynbss;
652 asection *srelbss;
9635fe29 653
eac338cf
PB		 654 /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */
655 asection *srelplt2;
656
eac338cf
PB		 657 /* True if the target system is VxWorks. */
658 int is_vxworks;
ec338859 659
eac338cf
PB		 660 /* Value used to fill the last word of the first plt entry. */
661 bfd_byte plt0_pad_byte;
9635fe29 662
5ae0bfb6
RS		 663 /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */
664 bfd_vma next_tls_desc_index;
665
13ae64f3
JJ		 666 union {
667 bfd_signed_vma refcount;
668 bfd_vma offset;
669 } tls_ldm_got;
670
67a4f2b7
AO		 671 /* The amount of space used by the reserved portion of the sgotplt
672 section, plus whatever space is used by the jump slots. */
673 bfd_vma sgotplt_jump_table_size;
674
ec338859
AM		 675 /* Small local sym to section mapping cache. */
676 struct sym_sec_cache sym_sec;
6725bdbf 677};
252b5132
RH		 678
679/* Get the i386 ELF linker hash table from a link_info structure. */
680
681#define elf_i386_hash_table(p) \
682 ((struct elf_i386_link_hash_table *) ((p)->hash))
683
67a4f2b7 684#define elf_i386_compute_jump_table_size(htab) \
5ae0bfb6 685 ((htab)->next_tls_desc_index * 4)
67a4f2b7 686
252b5132
RH		 687/* Create an entry in an i386 ELF linker hash table. */
688
689static struct bfd_hash_entry *
55fd94b0
AM		 690link_hash_newfunc (struct bfd_hash_entry *entry,
691 struct bfd_hash_table *table,
692 const char *string)
252b5132 693{
252b5132
RH		 694 /* Allocate the structure if it has not already been allocated by a
695 subclass. */
ebe50bae
AM		 696 if (entry == NULL)
697 {
698 entry = bfd_hash_allocate (table,
699 sizeof (struct elf_i386_link_hash_entry));
700 if (entry == NULL)
701 return entry;
702 }
252b5132
RH		 703
704 /* Call the allocation method of the superclass. */
ebe50bae
AM		 705 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
706 if (entry != NULL)
252b5132 707 {
ebe50bae
AM		 708 struct elf_i386_link_hash_entry *eh;
709
710 eh = (struct elf_i386_link_hash_entry *) entry;
711 eh->dyn_relocs = NULL;
13ae64f3 712 eh->tls_type = GOT_UNKNOWN;
67a4f2b7 713 eh->tlsdesc_got = (bfd_vma) -1;
252b5132
RH		 714 }
715
ebe50bae 716 return entry;
252b5132
RH		 717}
718
719/* Create an i386 ELF linker hash table. */
720
721static struct bfd_link_hash_table *
55fd94b0 722elf_i386_link_hash_table_create (bfd *abfd)
252b5132
RH		 723{
724 struct elf_i386_link_hash_table *ret;
dc810e39 725 bfd_size_type amt = sizeof (struct elf_i386_link_hash_table);
252b5132 726
55fd94b0 727 ret = bfd_malloc (amt);
ebe50bae 728 if (ret == NULL)
252b5132
RH		 729 return NULL;
730
66eb6687
AM		 731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
732 sizeof (struct elf_i386_link_hash_entry)))
252b5132 733 {
e2d34d7d 734 free (ret);
252b5132
RH		 735 return NULL;
736 }
737
6725bdbf
AM		 738 ret->sgot = NULL;
739 ret->sgotplt = NULL;
740 ret->srelgot = NULL;
741 ret->splt = NULL;
742 ret->srelplt = NULL;
743 ret->sdynbss = NULL;
744 ret->srelbss = NULL;
7a624474 745 ret->tls_ldm_got.refcount = 0;
5ae0bfb6 746 ret->next_tls_desc_index = 0;
67a4f2b7 747 ret->sgotplt_jump_table_size = 0;
ec338859 748 ret->sym_sec.abfd = NULL;
eac338cf
PB		 749 ret->is_vxworks = 0;
750 ret->srelplt2 = NULL;
eac338cf 751 ret->plt0_pad_byte = 0;
6725bdbf 752
ebe50bae 753 return &ret->elf.root;
252b5132
RH		 754}
755
6725bdbf
AM		 756/* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up
757 shortcuts to them in our hash table. */
758
b34976b6 759static bfd_boolean
55fd94b0 760create_got_section (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 761{
762 struct elf_i386_link_hash_table *htab;
763
764 if (! _bfd_elf_create_got_section (dynobj, info))
b34976b6 765 return FALSE;
6725bdbf
AM		 766
767 htab = elf_i386_hash_table (info);
768 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
769 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
770 if (!htab->sgot || !htab->sgotplt)
771 abort ();
772
3496cb2a
L		 773 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got",
774 (SEC_ALLOC | SEC_LOAD
775 | SEC_HAS_CONTENTS
776 | SEC_IN_MEMORY
777 | SEC_LINKER_CREATED
778 | SEC_READONLY));
6725bdbf 779 if (htab->srelgot == NULL
6725bdbf 780 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
b34976b6
AM		 781 return FALSE;
782 return TRUE;
6725bdbf
AM		 783}
784
785/* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and
786 .rel.bss sections in DYNOBJ, and set up shortcuts to them in our
787 hash table. */
788
b34976b6 789static bfd_boolean
55fd94b0 790elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
6725bdbf
AM		 791{
792 struct elf_i386_link_hash_table *htab;
793
794 htab = elf_i386_hash_table (info);
795 if (!htab->sgot && !create_got_section (dynobj, info))
b34976b6 796 return FALSE;
6725bdbf
AM		 797
798 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
b34976b6 799 return FALSE;
6725bdbf
AM		 800
801 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
802 htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt");
803 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
804 if (!info->shared)
805 htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss");
806
807 if (!htab->splt || !htab->srelplt || !htab->sdynbss
808 || (!info->shared && !htab->srelbss))
809 abort ();
810
711de32c
RS		 811 if (htab->is_vxworks
812 && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2))
813 return FALSE;
eac338cf 814
b34976b6 815 return TRUE;
6725bdbf
AM		 816}
817
ebe50bae
AM		 818/* Copy the extra info we tack onto an elf_link_hash_entry. */
819
51b64d56 820static void
fcfa13d2 821elf_i386_copy_indirect_symbol (struct bfd_link_info *info,
55fd94b0
AM		 822 struct elf_link_hash_entry *dir,
823 struct elf_link_hash_entry *ind)
ebe50bae
AM		 824{
825 struct elf_i386_link_hash_entry *edir, *eind;
826
827 edir = (struct elf_i386_link_hash_entry *) dir;
828 eind = (struct elf_i386_link_hash_entry *) ind;
829
bbd7ec4a 830 if (eind->dyn_relocs != NULL)
ebe50bae 831 {
bbd7ec4a
AM		 832 if (edir->dyn_relocs != NULL)
833 {
834 struct elf_i386_dyn_relocs **pp;
835 struct elf_i386_dyn_relocs *p;
836
fcfa13d2 837 /* Add reloc counts against the indirect sym to the direct sym
bbd7ec4a
AM		 838 list. Merge any entries against the same section. */
839 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
840 {
841 struct elf_i386_dyn_relocs *q;
842
843 for (q = edir->dyn_relocs; q != NULL; q = q->next)
844 if (q->sec == p->sec)
845 {
846 q->pc_count += p->pc_count;
847 q->count += p->count;
848 *pp = p->next;
849 break;
850 }
851 if (q == NULL)
852 pp = &p->next;
853 }
854 *pp = edir->dyn_relocs;
855 }
856
ebe50bae
AM		 857 edir->dyn_relocs = eind->dyn_relocs;
858 eind->dyn_relocs = NULL;
859 }
ebe50bae 860
cd67d266
JJ		 861 if (ind->root.type == bfd_link_hash_indirect
862 && dir->got.refcount <= 0)
863 {
864 edir->tls_type = eind->tls_type;
865 eind->tls_type = GOT_UNKNOWN;
866 }
81848ca0
AM		 867
868 if (ELIMINATE_COPY_RELOCS
869 && ind->root.type != bfd_link_hash_indirect
f5385ebf
AM		 870 && dir->dynamic_adjusted)
871 {
872 /* If called to transfer flags for a weakdef during processing
873 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
874 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
875 dir->ref_dynamic |= ind->ref_dynamic;
876 dir->ref_regular |= ind->ref_regular;
877 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
878 dir->needs_plt |= ind->needs_plt;
879 dir->pointer_equality_needed |= ind->pointer_equality_needed;
880 }
81848ca0 881 else
fcfa13d2 882 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
ebe50bae
AM		 883}
884
13ae64f3 885static int
55fd94b0 886elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local)
13ae64f3
JJ		 887{
888 if (info->shared)
889 return r_type;
890
891 switch (r_type)
892 {
893 case R_386_TLS_GD:
67a4f2b7
AO		 894 case R_386_TLS_GOTDESC:
895 case R_386_TLS_DESC_CALL:
13ae64f3
JJ		 896 case R_386_TLS_IE_32:
897 if (is_local)
898 return R_386_TLS_LE_32;
899 return R_386_TLS_IE_32;
37e55690
JJ		 900 case R_386_TLS_IE:
901 case R_386_TLS_GOTIE:
902 if (is_local)
903 return R_386_TLS_LE_32;
904 return r_type;
13ae64f3
JJ		 905 case R_386_TLS_LDM:
906 return R_386_TLS_LE_32;
907 }
908
909 return r_type;
910}
911
252b5132 912/* Look through the relocs for a section during the first phase, and
0ac8d2ca
AM		 913 calculate needed space in the global offset table, procedure linkage
914 table, and dynamic reloc sections. */
252b5132 915
b34976b6 916static bfd_boolean
55fd94b0
AM		 917elf_i386_check_relocs (bfd *abfd,
918 struct bfd_link_info *info,
919 asection *sec,
920 const Elf_Internal_Rela *relocs)
252b5132 921{
6725bdbf 922 struct elf_i386_link_hash_table *htab;
252b5132
RH		 923 Elf_Internal_Shdr *symtab_hdr;
924 struct elf_link_hash_entry **sym_hashes;
252b5132
RH		 925 const Elf_Internal_Rela *rel;
926 const Elf_Internal_Rela *rel_end;
252b5132
RH		 927 asection *sreloc;
928
1049f94e 929 if (info->relocatable)
b34976b6 930 return TRUE;
252b5132 931
6725bdbf 932 htab = elf_i386_hash_table (info);
252b5132
RH		 933 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
934 sym_hashes = elf_sym_hashes (abfd);
252b5132 935
252b5132
RH		 936 sreloc = NULL;
937
938 rel_end = relocs + sec->reloc_count;
939 for (rel = relocs; rel < rel_end; rel++)
940 {
13ae64f3 941 unsigned int r_type;
252b5132
RH		 942 unsigned long r_symndx;
943 struct elf_link_hash_entry *h;
944
945 r_symndx = ELF32_R_SYM (rel->r_info);
13ae64f3 946 r_type = ELF32_R_TYPE (rel->r_info);
252b5132 947
d9bc7a44 948 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
f5f31454 949 {
d003868e
AM		 950 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
951 abfd,
8f615d07 952 r_symndx);
b34976b6 953 return FALSE;
f5f31454
L		 954 }
955
252b5132
RH		 956 if (r_symndx < symtab_hdr->sh_info)
957 h = NULL;
958 else
71cb9464
L		 959 {
960 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
961 while (h->root.type == bfd_link_hash_indirect
962 || h->root.type == bfd_link_hash_warning)
963 h = (struct elf_link_hash_entry *) h->root.u.i.link;
964 }
252b5132 965
13ae64f3
JJ		 966 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
967
968 switch (r_type)
252b5132 969 {
37e55690
JJ		 970 case R_386_TLS_LDM:
971 htab->tls_ldm_got.refcount += 1;
972 goto create_got;
973
974 case R_386_PLT32:
975 /* This symbol requires a procedure linkage table entry. We
976 actually build the entry in adjust_dynamic_symbol,
977 because this might be a case of linking PIC code which is
978 never referenced by a dynamic object, in which case we
979 don't need to generate a procedure linkage table entry
980 after all. */
981
982 /* If this is a local symbol, we resolve it directly without
983 creating a procedure linkage table entry. */
984 if (h == NULL)
985 continue;
986
f5385ebf 987 h->needs_plt = 1;
37e55690
JJ		 988 h->plt.refcount += 1;
989 break;
990
13ae64f3 991 case R_386_TLS_IE_32:
37e55690
JJ		 992 case R_386_TLS_IE:
993 case R_386_TLS_GOTIE:
13ae64f3
JJ		 994 if (info->shared)
995 info->flags |= DF_STATIC_TLS;
37e55690
JJ		 996 /* Fall through */
997
252b5132 998 case R_386_GOT32:
13ae64f3 999 case R_386_TLS_GD:
67a4f2b7
AO		 1000 case R_386_TLS_GOTDESC:
1001 case R_386_TLS_DESC_CALL:
252b5132 1002 /* This symbol requires a global offset table entry. */
13ae64f3
JJ		 1003 {
1004 int tls_type, old_tls_type;
1005
1006 switch (r_type)
1007 {
1008 default:
1009 case R_386_GOT32: tls_type = GOT_NORMAL; break;
1010 case R_386_TLS_GD: tls_type = GOT_TLS_GD; break;
67a4f2b7
AO		 1011 case R_386_TLS_GOTDESC:
1012 case R_386_TLS_DESC_CALL:
1013 tls_type = GOT_TLS_GDESC; break;
37e55690
JJ		 1014 case R_386_TLS_IE_32:
1015 if (ELF32_R_TYPE (rel->r_info) == r_type)
1016 tls_type = GOT_TLS_IE_NEG;
cb878726
L		 1017 else if (h
1018 && ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
1019 /* If this is a GD->IE transition, we may use either
1020 of R_386_TLS_TPOFF and R_386_TLS_TPOFF32. But if
1021 we may have both R_386_TLS_IE and R_386_TLS_GD,
1022 we can't share the same R_386_TLS_TPOFF since
1023 they require different offsets. So we remember
1024 it comes from R_386_TLS_GD. */
1025 tls_type = GOT_TLS_IE | GOT_TLS_IE_GD;
37e55690 1026 else
37e55690
JJ		 1027 tls_type = GOT_TLS_IE;
1028 break;
1029 case R_386_TLS_IE:
cb878726
L		 1030 if (h)
1031 {
1032 /* We remember it comes from R_386_TLS_IE. */
1033 tls_type = GOT_TLS_IE_POS | GOT_TLS_IE_IE;
1034 break;
1035 }
37e55690
JJ		 1036 case R_386_TLS_GOTIE:
1037 tls_type = GOT_TLS_IE_POS; break;
13ae64f3
JJ		 1038 }
1039
1040 if (h != NULL)
1041 {
1042 h->got.refcount += 1;
1043 old_tls_type = elf_i386_hash_entry(h)->tls_type;
1044 }
1045 else
1046 {
1047 bfd_signed_vma *local_got_refcounts;
1048
1049 /* This is a global offset table entry for a local symbol. */
1050 local_got_refcounts = elf_local_got_refcounts (abfd);
1051 if (local_got_refcounts == NULL)
1052 {
1053 bfd_size_type size;
1054
1055 size = symtab_hdr->sh_info;
67a4f2b7
AO		 1056 size *= (sizeof (bfd_signed_vma)
1057 + sizeof (bfd_vma) + sizeof(char));
55fd94b0 1058 local_got_refcounts = bfd_zalloc (abfd, size);
13ae64f3 1059 if (local_got_refcounts == NULL)
b34976b6 1060 return FALSE;
13ae64f3 1061 elf_local_got_refcounts (abfd) = local_got_refcounts;
67a4f2b7
AO		 1062 elf_i386_local_tlsdesc_gotent (abfd)
1063 = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info);
13ae64f3 1064 elf_i386_local_got_tls_type (abfd)
67a4f2b7 1065 = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info);
13ae64f3
JJ		 1066 }
1067 local_got_refcounts[r_symndx] += 1;
1068 old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx];
1069 }
1070
37e55690
JJ		 1071 if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE))
1072 tls_type |= old_tls_type;
13ae64f3
JJ		 1073 /* If a TLS symbol is accessed using IE at least once,
1074 there is no point to use dynamic model for it. */
cb878726
L		 1075 else if (old_tls_type != tls_type
1076 && old_tls_type != GOT_UNKNOWN
67a4f2b7 1077 && (! GOT_TLS_GD_ANY_P (old_tls_type)
37e55690 1078 || (tls_type & GOT_TLS_IE) == 0))
13ae64f3 1079 {
67a4f2b7 1080 if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type))
37e55690 1081 tls_type = old_tls_type;
67a4f2b7
AO		 1082 else if (GOT_TLS_GD_ANY_P (old_tls_type)
1083 && GOT_TLS_GD_ANY_P (tls_type))
1084 tls_type |= old_tls_type;
13ae64f3
JJ		 1085 else
1086 {
1087 (*_bfd_error_handler)
d003868e 1088 (_("%B: `%s' accessed both as normal and "
55fd94b0 1089 "thread local symbol"),
d003868e 1090 abfd,
37e55690 1091 h ? h->root.root.string : "<local>");
b34976b6 1092 return FALSE;
13ae64f3
JJ		 1093 }
1094 }
1095
1096 if (old_tls_type != tls_type)
1097 {
1098 if (h != NULL)
1099 elf_i386_hash_entry (h)->tls_type = tls_type;
1100 else
1101 elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type;
1102 }
1103 }
0ac8d2ca
AM		 1104 /* Fall through */
1105
1106 case R_386_GOTOFF:
1107 case R_386_GOTPC:
13ae64f3 1108 create_got:
0ac8d2ca
AM		 1109 if (htab->sgot == NULL)
1110 {
1111 if (htab->elf.dynobj == NULL)
1112 htab->elf.dynobj = abfd;
1113 if (!create_got_section (htab->elf.dynobj, info))
b34976b6 1114 return FALSE;
0ac8d2ca 1115 }
37e55690
JJ		 1116 if (r_type != R_386_TLS_IE)
1117 break;
1118 /* Fall through */
252b5132 1119
37e55690
JJ		 1120 case R_386_TLS_LE_32:
1121 case R_386_TLS_LE:
1122 if (!info->shared)
1123 break;
bffbf940 1124 info->flags |= DF_STATIC_TLS;
b34976b6 1125 /* Fall through */
252b5132
RH		 1126
1127 case R_386_32:
1128 case R_386_PC32:
12d0ee4a 1129 if (h != NULL && !info->shared)
6725bdbf 1130 {
12d0ee4a 1131 /* If this reloc is in a read-only section, we might
ebe50bae
AM		 1132 need a copy reloc. We can't check reliably at this
1133 stage whether the section is read-only, as input
1134 sections have not yet been mapped to output sections.
1135 Tentatively set the flag for now, and correct in
1136 adjust_dynamic_symbol. */
f5385ebf 1137 h->non_got_ref = 1;
12d0ee4a
AM		 1138
1139 /* We may need a .plt entry if the function this reloc
1140 refers to is in a shared lib. */
51b64d56 1141 h->plt.refcount += 1;
c6585bbb 1142 if (r_type != R_386_PC32)
f5385ebf 1143 h->pointer_equality_needed = 1;
6725bdbf 1144 }
7843f00e 1145
252b5132 1146 /* If we are creating a shared library, and this is a reloc
f69da49f
AM		 1147 against a global symbol, or a non PC relative reloc
1148 against a local symbol, then we need to copy the reloc
1149 into the shared library. However, if we are linking with
1150 -Bsymbolic, we do not need to copy a reloc against a
1151 global symbol which is defined in an object we are
1152 including in the link (i.e., DEF_REGULAR is set). At
1153 this point we have not seen all the input files, so it is
1154 possible that DEF_REGULAR is not set now but will be set
1f655a09
L		 1155 later (it is never cleared). In case of a weak definition,
1156 DEF_REGULAR may be cleared later by a strong definition in
ebe50bae 1157 a shared library. We account for that possibility below by
1f655a09
L		 1158 storing information in the relocs_copied field of the hash
1159 table entry. A similar situation occurs when creating
1160 shared libraries and symbol visibility changes render the
12d0ee4a 1161 symbol local.
56882138 1162
12d0ee4a
AM		 1163 If on the other hand, we are creating an executable, we
1164 may need to keep relocations for symbols satisfied by a
1165 dynamic library if we manage to avoid copy relocs for the
1166 symbol. */
1167 if ((info->shared
1168 && (sec->flags & SEC_ALLOC) != 0
13ae64f3 1169 && (r_type != R_386_PC32
12d0ee4a
AM		 1170 || (h != NULL
1171 && (! info->symbolic
1172 || h->root.type == bfd_link_hash_defweak
f5385ebf 1173 || !h->def_regular))))
a23b6845
AM		 1174 || (ELIMINATE_COPY_RELOCS
1175 && !info->shared
12d0ee4a
AM		 1176 && (sec->flags & SEC_ALLOC) != 0
1177 && h != NULL
12d0ee4a 1178 && (h->root.type == bfd_link_hash_defweak
f5385ebf 1179 || !h->def_regular)))
252b5132 1180 {
ec338859
AM		 1181 struct elf_i386_dyn_relocs *p;
1182 struct elf_i386_dyn_relocs **head;
1183
12d0ee4a
AM		 1184 /* We must copy these reloc types into the output file.
1185 Create a reloc section in dynobj and make room for
1186 this reloc. */
252b5132
RH		 1187 if (sreloc == NULL)
1188 {
1189 const char *name;
0ac8d2ca 1190 bfd *dynobj;
e92d460e
AM		 1191 unsigned int strndx = elf_elfheader (abfd)->e_shstrndx;
1192 unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name;
252b5132 1193
e92d460e 1194 name = bfd_elf_string_from_elf_section (abfd, strndx, shnam);
252b5132 1195 if (name == NULL)
b34976b6 1196 return FALSE;
252b5132 1197
c8492176
L		 1198 if (strncmp (name, ".rel", 4) != 0
1199 || strcmp (bfd_get_section_name (abfd, sec),
1200 name + 4) != 0)
1201 {
0c715baa 1202 (*_bfd_error_handler)
d003868e
AM		 1203 (_("%B: bad relocation section name `%s\'"),
1204 abfd, name);
f5f31454 1205 }
252b5132 1206
0ac8d2ca
AM		 1207 if (htab->elf.dynobj == NULL)
1208 htab->elf.dynobj = abfd;
1209
1210 dynobj = htab->elf.dynobj;
252b5132
RH		 1211 sreloc = bfd_get_section_by_name (dynobj, name);
1212 if (sreloc == NULL)
1213 {
1214 flagword flags;
1215
252b5132
RH		 1216 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1217 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1218 if ((sec->flags & SEC_ALLOC) != 0)
1219 flags |= SEC_ALLOC | SEC_LOAD;
3496cb2a
L		 1220 sreloc = bfd_make_section_with_flags (dynobj,
1221 name,
1222 flags);
252b5132 1223 if (sreloc == NULL
252b5132 1224 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
b34976b6 1225 return FALSE;
252b5132 1226 }
0c715baa 1227 elf_section_data (sec)->sreloc = sreloc;
252b5132
RH		 1228 }
1229
0c715baa
AM		 1230 /* If this is a global symbol, we count the number of
1231 relocations we need for this symbol. */
1232 if (h != NULL)
252b5132 1233 {
ec338859 1234 head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs;
0c715baa
AM		 1235 }
1236 else
1237 {
e81d3500 1238 void **vpp;
ec338859
AM		 1239 /* Track dynamic relocs needed for local syms too.
1240 We really need local syms available to do this
1241 easily. Oh well. */
1242
1243 asection *s;
1244 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1245 sec, r_symndx);
1246 if (s == NULL)
b34976b6 1247 return FALSE;
ec338859 1248
e81d3500
DD		 1249 vpp = &elf_section_data (s)->local_dynrel;
1250 head = (struct elf_i386_dyn_relocs **)vpp;
ec338859
AM		 1251 }
1252
1253 p = *head;
1254 if (p == NULL || p->sec != sec)
1255 {
1256 bfd_size_type amt = sizeof *p;
55fd94b0 1257 p = bfd_alloc (htab->elf.dynobj, amt);
ec338859 1258 if (p == NULL)
b34976b6 1259 return FALSE;
ec338859
AM		 1260 p->next = *head;
1261 *head = p;
1262 p->sec = sec;
1263 p->count = 0;
1264 p->pc_count = 0;
252b5132 1265 }
ec338859
AM		 1266
1267 p->count += 1;
13ae64f3 1268 if (r_type == R_386_PC32)
ec338859 1269 p->pc_count += 1;
252b5132 1270 }
252b5132
RH		 1271 break;
1272
1273 /* This relocation describes the C++ object vtable hierarchy.
1274 Reconstruct it for later use during GC. */
1275 case R_386_GNU_VTINHERIT:
c152c796 1276 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
b34976b6 1277 return FALSE;
252b5132
RH		 1278 break;
1279
1280 /* This relocation describes which C++ vtable entries are actually
1281 used. Record for later use during GC. */
1282 case R_386_GNU_VTENTRY:
c152c796 1283 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset))
b34976b6 1284 return FALSE;
252b5132
RH		 1285 break;
1286
1287 default:
1288 break;
1289 }
1290 }
1291
b34976b6 1292 return TRUE;
252b5132
RH		 1293}
1294
1295/* Return the section that should be marked against GC for a given
1296 relocation. */
1297
1298static asection *
55fd94b0
AM		 1299elf_i386_gc_mark_hook (asection *sec,
1300 struct bfd_link_info *info ATTRIBUTE_UNUSED,
1301 Elf_Internal_Rela *rel,
1302 struct elf_link_hash_entry *h,
1303 Elf_Internal_Sym *sym)
252b5132
RH		 1304{
1305 if (h != NULL)
1306 {
1307 switch (ELF32_R_TYPE (rel->r_info))
1308 {
1309 case R_386_GNU_VTINHERIT:
1310 case R_386_GNU_VTENTRY:
1311 break;
1312
1313 default:
1314 switch (h->root.type)
1315 {
1316 case bfd_link_hash_defined:
1317 case bfd_link_hash_defweak:
1318 return h->root.u.def.section;
1319
1320 case bfd_link_hash_common:
1321 return h->root.u.c.p->section;
1322
1323 default:
1324 break;
1325 }
1326 }
1327 }
1328 else
1e2f5b6e 1329 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
252b5132
RH		 1330
1331 return NULL;
1332}
1333
1334/* Update the got entry reference counts for the section being removed. */
1335
b34976b6 1336static bfd_boolean
55fd94b0
AM		 1337elf_i386_gc_sweep_hook (bfd *abfd,
1338 struct bfd_link_info *info,
1339 asection *sec,
1340 const Elf_Internal_Rela *relocs)
252b5132 1341{
dd5724d5
AM		 1342 Elf_Internal_Shdr *symtab_hdr;
1343 struct elf_link_hash_entry **sym_hashes;
1344 bfd_signed_vma *local_got_refcounts;
1345 const Elf_Internal_Rela *rel, *relend;
dd5724d5 1346
ec338859 1347 elf_section_data (sec)->local_dynrel = NULL;
dd5724d5 1348
6725bdbf
AM		 1349 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1350 sym_hashes = elf_sym_hashes (abfd);
1351 local_got_refcounts = elf_local_got_refcounts (abfd);
dd5724d5
AM		 1352
1353 relend = relocs + sec->reloc_count;
1354 for (rel = relocs; rel < relend; rel++)
26e41594
AM		 1355 {
1356 unsigned long r_symndx;
1357 unsigned int r_type;
1358 struct elf_link_hash_entry *h = NULL;
37e55690 1359
26e41594
AM		 1360 r_symndx = ELF32_R_SYM (rel->r_info);
1361 if (r_symndx >= symtab_hdr->sh_info)
1362 {
1363 struct elf_i386_link_hash_entry *eh;
1364 struct elf_i386_dyn_relocs **pp;
1365 struct elf_i386_dyn_relocs *p;
dd5724d5 1366
26e41594 1367 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3eb128b2
AM		 1368 while (h->root.type == bfd_link_hash_indirect
1369 || h->root.type == bfd_link_hash_warning)
1370 h = (struct elf_link_hash_entry *) h->root.u.i.link;
26e41594 1371 eh = (struct elf_i386_link_hash_entry *) h;
0c715baa 1372
26e41594
AM		 1373 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1374 if (p->sec == sec)
1375 {
1376 /* Everything must go for SEC. */
1377 *pp = p->next;
1378 break;
1379 }
1380 }
0c715baa 1381
26e41594
AM		 1382 r_type = ELF32_R_TYPE (rel->r_info);
1383 r_type = elf_i386_tls_transition (info, r_type, h != NULL);
1384 switch (r_type)
1385 {
1386 case R_386_TLS_LDM:
1387 if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0)
1388 elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1;
1389 break;
0c715baa 1390
26e41594 1391 case R_386_TLS_GD:
67a4f2b7
AO		 1392 case R_386_TLS_GOTDESC:
1393 case R_386_TLS_DESC_CALL:
26e41594
AM		 1394 case R_386_TLS_IE_32:
1395 case R_386_TLS_IE:
1396 case R_386_TLS_GOTIE:
1397 case R_386_GOT32:
1398 if (h != NULL)
1399 {
1400 if (h->got.refcount > 0)
1401 h->got.refcount -= 1;
1402 }
1403 else if (local_got_refcounts != NULL)
1404 {
1405 if (local_got_refcounts[r_symndx] > 0)
1406 local_got_refcounts[r_symndx] -= 1;
1407 }
1408 break;
0c715baa 1409
26e41594
AM		 1410 case R_386_32:
1411 case R_386_PC32:
1412 if (info->shared)
1413 break;
1414 /* Fall through */
6725bdbf 1415
26e41594
AM		 1416 case R_386_PLT32:
1417 if (h != NULL)
1418 {
1419 if (h->plt.refcount > 0)
1420 h->plt.refcount -= 1;
1421 }
1422 break;
dd5724d5 1423
26e41594
AM		 1424 default:
1425 break;
1426 }
1427 }
252b5132 1428
b34976b6 1429 return TRUE;
252b5132
RH		 1430}
1431
1432/* Adjust a symbol defined by a dynamic object and referenced by a
1433 regular object. The current definition is in some section of the
1434 dynamic object, but we're not including those sections. We have to
1435 change the definition to something the rest of the link can
1436 understand. */
1437
b34976b6 1438static bfd_boolean
55fd94b0
AM		 1439elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info,
1440 struct elf_link_hash_entry *h)
252b5132 1441{
6725bdbf 1442 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1443 asection *s;
1444 unsigned int power_of_two;
1445
252b5132
RH		 1446 /* If this is a function, put it in the procedure linkage table. We
1447 will fill in the contents of the procedure linkage table later,
1448 when we know the address of the .got section. */
1449 if (h->type == STT_FUNC
f5385ebf 1450 || h->needs_plt)
252b5132 1451 {
6725bdbf 1452 if (h->plt.refcount <= 0
9c7a29a3
AM		 1453 || SYMBOL_CALLS_LOCAL (info, h)
1454 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1455 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 1456 {
1457 /* This case can occur if we saw a PLT32 reloc in an input
dd5724d5
AM		 1458 file, but the symbol was never referred to by a dynamic
1459 object, or if all references were garbage collected. In
1460 such a case, we don't actually need to build a procedure
1461 linkage table, and we can just do a PC32 reloc instead. */
bbd7ec4a 1462 h->plt.offset = (bfd_vma) -1;
f5385ebf 1463 h->needs_plt = 0;
252b5132
RH		 1464 }
1465
b34976b6 1466 return TRUE;
252b5132 1467 }
6725bdbf
AM		 1468 else
1469 /* It's possible that we incorrectly decided a .plt reloc was
1470 needed for an R_386_PC32 reloc to a non-function sym in
1471 check_relocs. We can't decide accurately between function and
1472 non-function syms in check-relocs; Objects loaded later in
1473 the link may change h->type. So fix it now. */
bbd7ec4a 1474 h->plt.offset = (bfd_vma) -1;
252b5132
RH		 1475
1476 /* If this is a weak symbol, and there is a real definition, the
1477 processor independent code will have arranged for us to see the
1478 real definition first, and we can just use the same value. */
f6e332e6 1479 if (h->u.weakdef != NULL)
252b5132 1480 {
f6e332e6
AM		 1481 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1482 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1483 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1484 h->root.u.def.value = h->u.weakdef->root.u.def.value;
a23b6845 1485 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
f6e332e6 1486 h->non_got_ref = h->u.weakdef->non_got_ref;
b34976b6 1487 return TRUE;
252b5132
RH		 1488 }
1489
1490 /* This is a reference to a symbol defined by a dynamic object which
1491 is not a function. */
1492
1493 /* If we are creating a shared library, we must presume that the
1494 only references to the symbol are via the global offset table.
1495 For such cases we need not do anything here; the relocations will
1496 be handled correctly by relocate_section. */
1497 if (info->shared)
b34976b6 1498 return TRUE;
252b5132 1499
7843f00e
ILT		 1500 /* If there are no references to this symbol that do not use the
1501 GOT, we don't need to generate a copy reloc. */
f5385ebf 1502 if (!h->non_got_ref)
b34976b6 1503 return TRUE;
7843f00e 1504
8bd621d8
AM		 1505 /* If -z nocopyreloc was given, we won't generate them either. */
1506 if (info->nocopyreloc)
1507 {
f5385ebf 1508 h->non_got_ref = 0;
b34976b6 1509 return TRUE;
8bd621d8
AM		 1510 }
1511
643796e3
DJ		 1512 htab = elf_i386_hash_table (info);
1513
1514 /* If there aren't any dynamic relocs in read-only sections, then
1515 we can keep the dynamic relocs and avoid the copy reloc. This
1516 doesn't work on VxWorks, where we can not have dynamic relocations
1517 (other than copy and jump slot relocations) in an executable. */
1518 if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks)
ebe50bae 1519 {
a23b6845
AM		 1520 struct elf_i386_link_hash_entry * eh;
1521 struct elf_i386_dyn_relocs *p;
ebe50bae 1522
a23b6845
AM		 1523 eh = (struct elf_i386_link_hash_entry *) h;
1524 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1525 {
1526 s = p->sec->output_section;
1527 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1528 break;
1529 }
1530
a23b6845
AM		 1531 if (p == NULL)
1532 {
f5385ebf 1533 h->non_got_ref = 0;
a23b6845
AM		 1534 return TRUE;
1535 }
ebe50bae
AM		 1536 }
1537
909272ee
AM		 1538 if (h->size == 0)
1539 {
1540 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1541 h->root.root.string);
1542 return TRUE;
1543 }
1544
252b5132
RH		 1545 /* We must allocate the symbol in our .dynbss section, which will
1546 become part of the .bss section of the executable. There will be
1547 an entry for this symbol in the .dynsym section. The dynamic
1548 object will contain position independent code, so all references
1549 from the dynamic object to this symbol will go through the global
1550 offset table. The dynamic linker will use the .dynsym entry to
1551 determine the address it must put in the global offset table, so
1552 both the dynamic object and the regular object will refer to the
1553 same memory location for the variable. */
1554
252b5132
RH		 1555 /* We must generate a R_386_COPY reloc to tell the dynamic linker to
1556 copy the initial value out of the dynamic object and into the
0ac8d2ca 1557 runtime process image. */
252b5132
RH		 1558 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1559 {
eea6121a 1560 htab->srelbss->size += sizeof (Elf32_External_Rel);
f5385ebf 1561 h->needs_copy = 1;
252b5132
RH		 1562 }
1563
1564 /* We need to figure out the alignment required for this symbol. I
1565 have no idea how ELF linkers handle this. */
1566 power_of_two = bfd_log2 (h->size);
1567 if (power_of_two > 3)
1568 power_of_two = 3;
1569
1570 /* Apply the required alignment. */
0ac8d2ca 1571 s = htab->sdynbss;
eea6121a 1572 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
0ac8d2ca 1573 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
252b5132 1574 {
0ac8d2ca 1575 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
b34976b6 1576 return FALSE;
252b5132
RH		 1577 }
1578
1579 /* Define the symbol as being at this point in the section. */
1580 h->root.u.def.section = s;
eea6121a 1581 h->root.u.def.value = s->size;
252b5132
RH		 1582
1583 /* Increment the section size to make room for the symbol. */
eea6121a 1584 s->size += h->size;
252b5132 1585
b34976b6 1586 return TRUE;
252b5132
RH		 1587}
1588
6725bdbf 1589/* Allocate space in .plt, .got and associated reloc sections for
0c715baa 1590 dynamic relocs. */
6725bdbf 1591
b34976b6 1592static bfd_boolean
55fd94b0 1593allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
6725bdbf
AM		 1594{
1595 struct bfd_link_info *info;
1596 struct elf_i386_link_hash_table *htab;
5a15f56f 1597 struct elf_i386_link_hash_entry *eh;
0c715baa 1598 struct elf_i386_dyn_relocs *p;
6725bdbf 1599
e92d460e 1600 if (h->root.type == bfd_link_hash_indirect)
b34976b6 1601 return TRUE;
6725bdbf 1602
e92d460e
AM		 1603 if (h->root.type == bfd_link_hash_warning)
1604 /* When warning symbols are created, they **replace** the "real"
1605 entry in the hash table, thus we never get to see the real
1606 symbol in a hash traversal. So look at it now. */
1607 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1608
6725bdbf
AM		 1609 info = (struct bfd_link_info *) inf;
1610 htab = elf_i386_hash_table (info);
1611
ebe50bae 1612 if (htab->elf.dynamic_sections_created
9c7a29a3 1613 && h->plt.refcount > 0)
6725bdbf 1614 {
5a15f56f
AM		 1615 /* Make sure this symbol is output as a dynamic symbol.
1616 Undefined weak syms won't yet be marked as dynamic. */
1617 if (h->dynindx == -1
f5385ebf 1618 && !h->forced_local)
5a15f56f 1619 {
c152c796 1620 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1621 return FALSE;
5a15f56f
AM		 1622 }
1623
4e795f50
AM		 1624 if (info->shared
1625 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
ced53ee5 1626 {
0ac8d2ca 1627 asection *s = htab->splt;
6725bdbf 1628
ced53ee5
AM		 1629 /* If this is the first .plt entry, make room for the special
1630 first entry. */
eea6121a
AM		 1631 if (s->size == 0)
1632 s->size += PLT_ENTRY_SIZE;
6725bdbf 1633
eea6121a 1634 h->plt.offset = s->size;
6725bdbf 1635
ced53ee5
AM		 1636 /* If this symbol is not defined in a regular file, and we are
1637 not generating a shared library, then set the symbol to this
1638 location in the .plt. This is required to make function
1639 pointers compare as equal between the normal executable and
1640 the shared library. */
1641 if (! info->shared
f5385ebf 1642 && !h->def_regular)
ced53ee5
AM		 1643 {
1644 h->root.u.def.section = s;
1645 h->root.u.def.value = h->plt.offset;
1646 }
6725bdbf 1647
ced53ee5 1648 /* Make room for this entry. */
eea6121a 1649 s->size += PLT_ENTRY_SIZE;
6725bdbf 1650
ced53ee5
AM		 1651 /* We also need to make an entry in the .got.plt section, which
1652 will be placed in the .got section by the linker script. */
eea6121a 1653 htab->sgotplt->size += 4;
6725bdbf 1654
6725bdbf 1655 /* We also need to make an entry in the .rel.plt section. */
eea6121a 1656 htab->srelplt->size += sizeof (Elf32_External_Rel);
5ae0bfb6 1657 htab->next_tls_desc_index++;
eac338cf
PB		 1658
1659 if (htab->is_vxworks && !info->shared)
1660 {
1661 /* VxWorks has a second set of relocations for each PLT entry
1662 in executables. They go in a separate relocation section,
1663 which is processed by the kernel loader. */
1664
1665 /* There are two relocations for the initial PLT entry: an
1666 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an
1667 R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
1668
1669 if (h->plt.offset == PLT_ENTRY_SIZE)
1670 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1671
1672 /* There are two extra relocations for each subsequent PLT entry:
1673 an R_386_32 relocation for the GOT entry, and an R_386_32
1674 relocation for the PLT entry. */
1675
1676 htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2);
1677 }
6725bdbf 1678 }
ced53ee5
AM		 1679 else
1680 {
51b64d56 1681 h->plt.offset = (bfd_vma) -1;
f5385ebf 1682 h->needs_plt = 0;
ced53ee5 1683 }
6725bdbf
AM		 1684 }
1685 else
1686 {
51b64d56 1687 h->plt.offset = (bfd_vma) -1;
f5385ebf 1688 h->needs_plt = 0;
6725bdbf
AM		 1689 }
1690
67a4f2b7
AO		 1691 eh = (struct elf_i386_link_hash_entry *) h;
1692 eh->tlsdesc_got = (bfd_vma) -1;
1693
37e55690 1694 /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary,
13ae64f3
JJ		 1695 make it a R_386_TLS_LE_32 requiring no TLS entry. */
1696 if (h->got.refcount > 0
1697 && !info->shared
1698 && h->dynindx == -1
37e55690 1699 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE))
cedb70c5 1700 h->got.offset = (bfd_vma) -1;
13ae64f3 1701 else if (h->got.refcount > 0)
6725bdbf 1702 {
0ac8d2ca 1703 asection *s;
b34976b6 1704 bfd_boolean dyn;
13ae64f3 1705 int tls_type = elf_i386_hash_entry(h)->tls_type;
cb878726
L		 1706
1707 /* If we have both R_386_TLS_IE and R_386_TLS_GD, GOT_TLS_IE_BOTH
1708 should be used. */
1709 if ((tls_type & GOT_TLS_IE_MASK)
1710 == (GOT_TLS_IE_IE | GOT_TLS_IE_GD))
1711 tls_type = GOT_TLS_IE_BOTH;
1712 else
1713 tls_type &= GOT_TLS_MASK;
6725bdbf 1714
5a15f56f
AM		 1715 /* Make sure this symbol is output as a dynamic symbol.
1716 Undefined weak syms won't yet be marked as dynamic. */
1717 if (h->dynindx == -1
f5385ebf 1718 && !h->forced_local)
5a15f56f 1719 {
c152c796 1720 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1721 return FALSE;
5a15f56f
AM		 1722 }
1723
6725bdbf 1724 s = htab->sgot;
67a4f2b7
AO		 1725 if (GOT_TLS_GDESC_P (tls_type))
1726 {
1727 eh->tlsdesc_got = htab->sgotplt->size
1728 - elf_i386_compute_jump_table_size (htab);
1729 htab->sgotplt->size += 8;
1730 h->got.offset = (bfd_vma) -2;
1731 }
1732 if (! GOT_TLS_GDESC_P (tls_type)
1733 || GOT_TLS_GD_P (tls_type))
1734 {
1735 h->got.offset = s->size;
1736 s->size += 4;
1737 /* R_386_TLS_GD needs 2 consecutive GOT slots. */
1738 if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH)
1739 s->size += 4;
1740 }
ebe50bae 1741 dyn = htab->elf.dynamic_sections_created;
13ae64f3 1742 /* R_386_TLS_IE_32 needs one dynamic relocation,
37e55690
JJ		 1743 R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation,
1744 (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we
1745 need two), R_386_TLS_GD needs one if local symbol and two if
1746 global. */
1747 if (tls_type == GOT_TLS_IE_BOTH)
eea6121a 1748 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7 1749 else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1)
37e55690 1750 || (tls_type & GOT_TLS_IE))
eea6121a 1751 htab->srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7 1752 else if (GOT_TLS_GD_P (tls_type))
eea6121a 1753 htab->srelgot->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 1754 else if (! GOT_TLS_GDESC_P (tls_type)
1755 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1756 || h->root.type != bfd_link_hash_undefweak)
ef5aade5
L		 1757 && (info->shared
1758 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
eea6121a 1759 htab->srelgot->size += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 1760 if (GOT_TLS_GDESC_P (tls_type))
1761 htab->srelplt->size += sizeof (Elf32_External_Rel);
6725bdbf
AM		 1762 }
1763 else
51b64d56 1764 h->got.offset = (bfd_vma) -1;
6725bdbf 1765
5a15f56f 1766 if (eh->dyn_relocs == NULL)
b34976b6 1767 return TRUE;
5a15f56f 1768
0c715baa
AM		 1769 /* In the shared -Bsymbolic case, discard space allocated for
1770 dynamic pc-relative relocs against symbols which turn out to be
1771 defined in regular objects. For the normal shared case, discard
0ac8d2ca
AM		 1772 space for pc-relative relocs that have become local due to symbol
1773 visibility changes. */
0c715baa
AM		 1774
1775 if (info->shared)
5a15f56f 1776 {
09695f56
AM		 1777 /* The only reloc that uses pc_count is R_386_PC32, which will
1778 appear on a call or on something like ".long foo - .". We
1779 want calls to protected symbols to resolve directly to the
1780 function rather than going via the plt. If people want
1781 function pointer comparisons to work as expected then they
1782 should avoid writing assembly like ".long foo - .". */
1783 if (SYMBOL_CALLS_LOCAL (info, h))
5a15f56f 1784 {
0c715baa
AM		 1785 struct elf_i386_dyn_relocs **pp;
1786
1787 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1788 {
1789 p->count -= p->pc_count;
1790 p->pc_count = 0;
1791 if (p->count == 0)
1792 *pp = p->next;
1793 else
1794 pp = &p->next;
1795 }
5a15f56f 1796 }
4e795f50
AM		 1797
1798 /* Also discard relocs on undefined weak syms with non-default
1799 visibility. */
22d606e9 1800 if (eh->dyn_relocs != NULL
4e795f50 1801 && h->root.type == bfd_link_hash_undefweak)
22d606e9
AM		 1802 {
1803 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1804 eh->dyn_relocs = NULL;
1805
1806 /* Make sure undefined weak symbols are output as a dynamic
1807 symbol in PIEs. */
1808 else if (h->dynindx == -1
1809 && !h->forced_local)
1810 {
1811 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1812 return FALSE;
1813 }
1814 }
0c715baa 1815 }
a23b6845 1816 else if (ELIMINATE_COPY_RELOCS)
0c715baa
AM		 1817 {
1818 /* For the non-shared case, discard space for relocs against
1819 symbols which turn out to need copy relocs or are not
1820 dynamic. */
1821
f5385ebf
AM		 1822 if (!h->non_got_ref
1823 && ((h->def_dynamic
1824 && !h->def_regular)
ebe50bae 1825 || (htab->elf.dynamic_sections_created
0c715baa
AM		 1826 && (h->root.type == bfd_link_hash_undefweak
1827 || h->root.type == bfd_link_hash_undefined))))
1828 {
1829 /* Make sure this symbol is output as a dynamic symbol.
1830 Undefined weak syms won't yet be marked as dynamic. */
1831 if (h->dynindx == -1
f5385ebf 1832 && !h->forced_local)
0c715baa 1833 {
c152c796 1834 if (! bfd_elf_link_record_dynamic_symbol (info, h))
b34976b6 1835 return FALSE;
0c715baa 1836 }
5a15f56f 1837
0c715baa
AM		 1838 /* If that succeeded, we know we'll be keeping all the
1839 relocs. */
1840 if (h->dynindx != -1)
1841 goto keep;
1842 }
1843
1844 eh->dyn_relocs = NULL;
1845
ec338859 1846 keep: ;
5a15f56f
AM		 1847 }
1848
0c715baa
AM		 1849 /* Finally, allocate space. */
1850 for (p = eh->dyn_relocs; p != NULL; p = p->next)
12d0ee4a 1851 {
0c715baa 1852 asection *sreloc = elf_section_data (p->sec)->sreloc;
eea6121a 1853 sreloc->size += p->count * sizeof (Elf32_External_Rel);
12d0ee4a
AM		 1854 }
1855
b34976b6 1856 return TRUE;
6725bdbf
AM		 1857}
1858
0c715baa
AM		 1859/* Find any dynamic relocs that apply to read-only sections. */
1860
b34976b6 1861static bfd_boolean
55fd94b0 1862readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf)
0c715baa
AM		 1863{
1864 struct elf_i386_link_hash_entry *eh;
1865 struct elf_i386_dyn_relocs *p;
1866
e92d460e
AM		 1867 if (h->root.type == bfd_link_hash_warning)
1868 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1869
0c715baa
AM		 1870 eh = (struct elf_i386_link_hash_entry *) h;
1871 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1872 {
1873 asection *s = p->sec->output_section;
1874
1875 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1876 {
1877 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1878
1879 info->flags |= DF_TEXTREL;
1880
1881 /* Not an error, just cut short the traversal. */
b34976b6 1882 return FALSE;
0c715baa
AM		 1883 }
1884 }
b34976b6 1885 return TRUE;
0c715baa
AM		 1886}
1887
252b5132
RH		 1888/* Set the sizes of the dynamic sections. */
1889
b34976b6 1890static bfd_boolean
55fd94b0
AM		 1891elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1892 struct bfd_link_info *info)
252b5132 1893{
6725bdbf 1894 struct elf_i386_link_hash_table *htab;
252b5132
RH		 1895 bfd *dynobj;
1896 asection *s;
b34976b6 1897 bfd_boolean relocs;
0c715baa 1898 bfd *ibfd;
252b5132 1899
6725bdbf 1900 htab = elf_i386_hash_table (info);
ebe50bae 1901 dynobj = htab->elf.dynobj;
ffb2e45b
AM		 1902 if (dynobj == NULL)
1903 abort ();
252b5132 1904
ebe50bae 1905 if (htab->elf.dynamic_sections_created)
252b5132
RH		 1906 {
1907 /* Set the contents of the .interp section to the interpreter. */
36af4a4e 1908 if (info->executable)
252b5132
RH		 1909 {
1910 s = bfd_get_section_by_name (dynobj, ".interp");
ffb2e45b
AM		 1911 if (s == NULL)
1912 abort ();
eea6121a 1913 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
252b5132
RH		 1914 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1915 }
161d71a6 1916 }
6725bdbf 1917
0c715baa
AM		 1918 /* Set up .got offsets for local syms, and space for local dynamic
1919 relocs. */
1920 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
161d71a6
L		 1921 {
1922 bfd_signed_vma *local_got;
1923 bfd_signed_vma *end_local_got;
13ae64f3 1924 char *local_tls_type;
67a4f2b7 1925 bfd_vma *local_tlsdesc_gotent;
161d71a6
L		 1926 bfd_size_type locsymcount;
1927 Elf_Internal_Shdr *symtab_hdr;
1928 asection *srel;
6725bdbf 1929
0c715baa 1930 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
161d71a6 1931 continue;
6725bdbf 1932
0c715baa
AM		 1933 for (s = ibfd->sections; s != NULL; s = s->next)
1934 {
ec338859 1935 struct elf_i386_dyn_relocs *p;
0c715baa 1936
e81d3500
DD		 1937 for (p = ((struct elf_i386_dyn_relocs *)
1938 elf_section_data (s)->local_dynrel);
ec338859
AM		 1939 p != NULL;
1940 p = p->next)
0c715baa 1941 {
ec338859
AM		 1942 if (!bfd_is_abs_section (p->sec)
1943 && bfd_is_abs_section (p->sec->output_section))
1944 {
1945 /* Input section has been discarded, either because
1946 it is a copy of a linkonce section or due to
1947 linker script /DISCARD/, so we'll be discarding
1948 the relocs too. */
1949 }
248866a8 1950 else if (p->count != 0)
ec338859
AM		 1951 {
1952 srel = elf_section_data (p->sec)->sreloc;
eea6121a 1953 srel->size += p->count * sizeof (Elf32_External_Rel);
248866a8
AM		 1954 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1955 info->flags |= DF_TEXTREL;
ec338859 1956 }
0c715baa
AM		 1957 }
1958 }
1959
1960 local_got = elf_local_got_refcounts (ibfd);
161d71a6
L		 1961 if (!local_got)
1962 continue;
6725bdbf 1963
0c715baa 1964 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
161d71a6
L		 1965 locsymcount = symtab_hdr->sh_info;
1966 end_local_got = local_got + locsymcount;
13ae64f3 1967 local_tls_type = elf_i386_local_got_tls_type (ibfd);
67a4f2b7 1968 local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd);
161d71a6
L		 1969 s = htab->sgot;
1970 srel = htab->srelgot;
67a4f2b7
AO		 1971 for (; local_got < end_local_got;
1972 ++local_got, ++local_tls_type, ++local_tlsdesc_gotent)
161d71a6 1973 {
67a4f2b7 1974 *local_tlsdesc_gotent = (bfd_vma) -1;
161d71a6 1975 if (*local_got > 0)
6725bdbf 1976 {
67a4f2b7
AO		 1977 if (GOT_TLS_GDESC_P (*local_tls_type))
1978 {
1979 *local_tlsdesc_gotent = htab->sgotplt->size
1980 - elf_i386_compute_jump_table_size (htab);
1981 htab->sgotplt->size += 8;
1982 *local_got = (bfd_vma) -2;
1983 }
1984 if (! GOT_TLS_GDESC_P (*local_tls_type)
1985 || GOT_TLS_GD_P (*local_tls_type))
1986 {
1987 *local_got = s->size;
1988 s->size += 4;
1989 if (GOT_TLS_GD_P (*local_tls_type)
1990 || *local_tls_type == GOT_TLS_IE_BOTH)
1991 s->size += 4;
1992 }
13ae64f3 1993 if (info->shared
67a4f2b7 1994 || GOT_TLS_GD_ANY_P (*local_tls_type)
37e55690
JJ		 1995 || (*local_tls_type & GOT_TLS_IE))
1996 {
1997 if (*local_tls_type == GOT_TLS_IE_BOTH)
eea6121a 1998 srel->size += 2 * sizeof (Elf32_External_Rel);
67a4f2b7
AO		 1999 else if (GOT_TLS_GD_P (*local_tls_type)
2000 || ! GOT_TLS_GDESC_P (*local_tls_type))
eea6121a 2001 srel->size += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 2002 if (GOT_TLS_GDESC_P (*local_tls_type))
2003 htab->srelplt->size += sizeof (Elf32_External_Rel);
37e55690 2004 }
6725bdbf 2005 }
161d71a6
L		 2006 else
2007 *local_got = (bfd_vma) -1;
6725bdbf 2008 }
252b5132 2009 }
6725bdbf 2010
13ae64f3
JJ		 2011 if (htab->tls_ldm_got.refcount > 0)
2012 {
2013 /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM
2014 relocs. */
eea6121a
AM		 2015 htab->tls_ldm_got.offset = htab->sgot->size;
2016 htab->sgot->size += 8;
2017 htab->srelgot->size += sizeof (Elf32_External_Rel);
13ae64f3
JJ		 2018 }
2019 else
2020 htab->tls_ldm_got.offset = -1;
2021
0c715baa
AM		 2022 /* Allocate global sym .plt and .got entries, and space for global
2023 sym dynamic relocs. */
ebe50bae 2024 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
252b5132 2025
67a4f2b7
AO		 2026 /* For every jump slot reserved in the sgotplt, reloc_count is
2027 incremented. However, when we reserve space for TLS descriptors,
2028 it's not incremented, so in order to compute the space reserved
2029 for them, it suffices to multiply the reloc count by the jump
2030 slot size. */
2031 if (htab->srelplt)
5ae0bfb6 2032 htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4;
67a4f2b7 2033
5a15f56f
AM		 2034 /* We now have determined the sizes of the various dynamic sections.
2035 Allocate memory for them. */
b34976b6 2036 relocs = FALSE;
252b5132
RH		 2037 for (s = dynobj->sections; s != NULL; s = s->next)
2038 {
eac338cf
PB		 2039 bfd_boolean strip_section = TRUE;
2040
252b5132
RH		 2041 if ((s->flags & SEC_LINKER_CREATED) == 0)
2042 continue;
2043
6725bdbf
AM		 2044 if (s == htab->splt
2045 || s == htab->sgot
75ff4589
L		 2046 || s == htab->sgotplt
2047 || s == htab->sdynbss)
252b5132 2048 {
6725bdbf
AM		 2049 /* Strip this section if we don't need it; see the
2050 comment below. */
eac338cf
PB		 2051 /* We'd like to strip these sections if they aren't needed, but if
2052 we've exported dynamic symbols from them we must leave them.
2053 It's too late to tell BFD to get rid of the symbols. */
2054
7325306f 2055 if (htab->elf.hplt != NULL)
eac338cf 2056 strip_section = FALSE;
252b5132 2057 }
6725bdbf 2058 else if (strncmp (bfd_get_section_name (dynobj, s), ".rel", 4) == 0)
252b5132 2059 {
eac338cf 2060 if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2)
b34976b6 2061 relocs = TRUE;
252b5132 2062
0ac8d2ca
AM		 2063 /* We use the reloc_count field as a counter if we need
2064 to copy relocs into the output file. */
5ae0bfb6 2065 s->reloc_count = 0;
252b5132 2066 }
6725bdbf 2067 else
252b5132
RH		 2068 {
2069 /* It's not one of our sections, so don't allocate space. */
2070 continue;
2071 }
2072
c456f082 2073 if (s->size == 0)
252b5132 2074 {
0ac8d2ca
AM		 2075 /* If we don't need this section, strip it from the
2076 output file. This is mostly to handle .rel.bss and
2077 .rel.plt. We must create both sections in
2078 create_dynamic_sections, because they must be created
2079 before the linker maps input sections to output
2080 sections. The linker does that before
2081 adjust_dynamic_symbol is called, and it is that
2082 function which decides whether anything needs to go
2083 into these sections. */
c456f082
AM		 2084 if (strip_section)
2085 s->flags |= SEC_EXCLUDE;
252b5132
RH		 2086 continue;
2087 }
2088
c456f082
AM		 2089 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2090 continue;
2091
f69da49f
AM		 2092 /* Allocate memory for the section contents. We use bfd_zalloc
2093 here in case unused entries are not reclaimed before the
2094 section's contents are written out. This should not happen,
2095 but this way if it does, we get a R_386_NONE reloc instead
2096 of garbage. */
eea6121a 2097 s->contents = bfd_zalloc (dynobj, s->size);
6725bdbf 2098 if (s->contents == NULL)
b34976b6 2099 return FALSE;
252b5132
RH		 2100 }
2101
ebe50bae 2102 if (htab->elf.dynamic_sections_created)
252b5132
RH		 2103 {
2104 /* Add some entries to the .dynamic section. We fill in the
2105 values later, in elf_i386_finish_dynamic_sections, but we
2106 must add the entries now so that we get the correct size for
2107 the .dynamic section. The DT_DEBUG entry is filled in by the
2108 dynamic linker and used by the debugger. */
dc810e39 2109#define add_dynamic_entry(TAG, VAL) \
5a580b3a 2110 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
dc810e39 2111
36af4a4e 2112 if (info->executable)
252b5132 2113 {
dc810e39 2114 if (!add_dynamic_entry (DT_DEBUG, 0))
b34976b6 2115 return FALSE;
252b5132
RH		 2116 }
2117
eea6121a 2118 if (htab->splt->size != 0)
252b5132 2119 {
dc810e39
AM		 2120 if (!add_dynamic_entry (DT_PLTGOT, 0)
2121 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2122 || !add_dynamic_entry (DT_PLTREL, DT_REL)
2123 || !add_dynamic_entry (DT_JMPREL, 0))
b34976b6 2124 return FALSE;
252b5132
RH		 2125 }
2126
2127 if (relocs)
2128 {
dc810e39
AM		 2129 if (!add_dynamic_entry (DT_REL, 0)
2130 || !add_dynamic_entry (DT_RELSZ, 0)
2131 || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel)))
b34976b6 2132 return FALSE;
252b5132 2133
0c715baa
AM		 2134 /* If any dynamic relocs apply to a read-only section,
2135 then we need a DT_TEXTREL entry. */
248866a8
AM		 2136 if ((info->flags & DF_TEXTREL) == 0)
2137 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2138 (PTR) info);
0c715baa
AM		 2139
2140 if ((info->flags & DF_TEXTREL) != 0)
2141 {
2142 if (!add_dynamic_entry (DT_TEXTREL, 0))
b34976b6 2143 return FALSE;
0c715baa 2144 }
252b5132
RH		 2145 }
2146 }
dc810e39 2147#undef add_dynamic_entry
252b5132 2148
b34976b6 2149 return TRUE;
252b5132
RH		 2150}
2151
67a4f2b7
AO		 2152static bfd_boolean
2153elf_i386_always_size_sections (bfd *output_bfd,
2154 struct bfd_link_info *info)
2155{
2156 asection *tls_sec = elf_hash_table (info)->tls_sec;
2157
2158 if (tls_sec)
2159 {
2160 struct elf_link_hash_entry *tlsbase;
2161
2162 tlsbase = elf_link_hash_lookup (elf_hash_table (info),
2163 "_TLS_MODULE_BASE_",
2164 FALSE, FALSE, FALSE);
2165
2166 if (tlsbase && tlsbase->type == STT_TLS)
2167 {
2168 struct bfd_link_hash_entry *bh = NULL;
2169 const struct elf_backend_data *bed
2170 = get_elf_backend_data (output_bfd);
2171
2172 if (!(_bfd_generic_link_add_one_symbol
2173 (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL,
2174 tls_sec, 0, NULL, FALSE,
2175 bed->collect, &bh)))
2176 return FALSE;
2177 tlsbase = (struct elf_link_hash_entry *)bh;
2178 tlsbase->def_regular = 1;
2179 tlsbase->other = STV_HIDDEN;
2180 (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE);
2181 }
2182 }
2183
2184 return TRUE;
2185}
2186
38701953
AM		 2187/* Set the correct type for an x86 ELF section. We do this by the
2188 section name, which is a hack, but ought to work. */
2189
b34976b6 2190static bfd_boolean
55fd94b0
AM		 2191elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
2192 Elf_Internal_Shdr *hdr,
2193 asection *sec)
38701953
AM		 2194{
2195 register const char *name;
2196
2197 name = bfd_get_section_name (abfd, sec);
2198
2199 /* This is an ugly, but unfortunately necessary hack that is
2200 needed when producing EFI binaries on x86. It tells
2201 elf.c:elf_fake_sections() not to consider ".reloc" as a section
2202 containing ELF relocation info. We need this hack in order to
2203 be able to generate ELF binaries that can be translated into
2204 EFI applications (which are essentially COFF objects). Those
2205 files contain a COFF ".reloc" section inside an ELFNN object,
2206 which would normally cause BFD to segfault because it would
2207 attempt to interpret this section as containing relocation
2208 entries for section "oc". With this hack enabled, ".reloc"
2209 will be treated as a normal data section, which will avoid the
2210 segfault. However, you won't be able to create an ELFNN binary
2211 with a section named "oc" that needs relocations, but that's
2212 the kind of ugly side-effects you get when detecting section
2213 types based on their names... In practice, this limitation is
2214 unlikely to bite. */
2215 if (strcmp (name, ".reloc") == 0)
2216 hdr->sh_type = SHT_PROGBITS;
2217
b34976b6 2218 return TRUE;
38701953
AM		 2219}
2220
13ae64f3
JJ		 2221/* Return the base VMA address which should be subtracted from real addresses
2222 when resolving @dtpoff relocation.
2223 This is PT_TLS segment p_vaddr. */
2224
2225static bfd_vma
55fd94b0 2226dtpoff_base (struct bfd_link_info *info)
13ae64f3 2227{
e1918d23
AM		 2228 /* If tls_sec is NULL, we should have signalled an error already. */
2229 if (elf_hash_table (info)->tls_sec == NULL)
6a30718d 2230 return 0;
e1918d23 2231 return elf_hash_table (info)->tls_sec->vma;
13ae64f3
JJ		 2232}
2233
2234/* Return the relocation value for @tpoff relocation
2235 if STT_TLS virtual address is ADDRESS. */
2236
2237static bfd_vma
55fd94b0 2238tpoff (struct bfd_link_info *info, bfd_vma address)
13ae64f3 2239{
e1918d23 2240 struct elf_link_hash_table *htab = elf_hash_table (info);
13ae64f3 2241
e1918d23
AM		 2242 /* If tls_sec is NULL, we should have signalled an error already. */
2243 if (htab->tls_sec == NULL)
6a30718d 2244 return 0;
e1918d23 2245 return htab->tls_size + htab->tls_sec->vma - address;
13ae64f3
JJ		 2246}
2247
252b5132
RH		 2248/* Relocate an i386 ELF section. */
2249
b34976b6 2250static bfd_boolean
55fd94b0
AM		 2251elf_i386_relocate_section (bfd *output_bfd,
2252 struct bfd_link_info *info,
2253 bfd *input_bfd,
2254 asection *input_section,
2255 bfd_byte *contents,
2256 Elf_Internal_Rela *relocs,
2257 Elf_Internal_Sym *local_syms,
2258 asection **local_sections)
252b5132 2259{
6725bdbf 2260 struct elf_i386_link_hash_table *htab;
252b5132
RH		 2261 Elf_Internal_Shdr *symtab_hdr;
2262 struct elf_link_hash_entry **sym_hashes;
2263 bfd_vma *local_got_offsets;
67a4f2b7 2264 bfd_vma *local_tlsdesc_gotents;
252b5132
RH		 2265 Elf_Internal_Rela *rel;
2266 Elf_Internal_Rela *relend;
2267
6725bdbf 2268 htab = elf_i386_hash_table (info);
252b5132
RH		 2269 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2270 sym_hashes = elf_sym_hashes (input_bfd);
2271 local_got_offsets = elf_local_got_offsets (input_bfd);
67a4f2b7 2272 local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd);
252b5132 2273
252b5132
RH		 2274 rel = relocs;
2275 relend = relocs + input_section->reloc_count;
2276 for (; rel < relend; rel++)
2277 {
13ae64f3 2278 unsigned int r_type;
252b5132
RH		 2279 reloc_howto_type *howto;
2280 unsigned long r_symndx;
2281 struct elf_link_hash_entry *h;
2282 Elf_Internal_Sym *sym;
2283 asection *sec;
67a4f2b7 2284 bfd_vma off, offplt;
252b5132 2285 bfd_vma relocation;
b34976b6 2286 bfd_boolean unresolved_reloc;
252b5132 2287 bfd_reloc_status_type r;
1b452ec6 2288 unsigned int indx;
13ae64f3 2289 int tls_type;
252b5132
RH		 2290
2291 r_type = ELF32_R_TYPE (rel->r_info);
55fd94b0
AM		 2292 if (r_type == R_386_GNU_VTINHERIT
2293 || r_type == R_386_GNU_VTENTRY)
252b5132 2294 continue;
dc47f327 2295
55fd94b0 2296 if ((indx = r_type) >= R_386_standard
13ae64f3
JJ		 2297 && ((indx = r_type - R_386_ext_offset) - R_386_standard
2298 >= R_386_ext - R_386_standard)
2299 && ((indx = r_type - R_386_tls_offset) - R_386_ext
2300 >= R_386_tls - R_386_ext))
252b5132 2301 {
6ba842b6 2302 (*_bfd_error_handler)
d003868e
AM		 2303 (_("%B: unrecognized relocation (0x%x) in section `%A'"),
2304 input_bfd, input_section, r_type);
252b5132 2305 bfd_set_error (bfd_error_bad_value);
b34976b6 2306 return FALSE;
252b5132 2307 }
1b452ec6 2308 howto = elf_howto_table + indx;
252b5132
RH		 2309
2310 r_symndx = ELF32_R_SYM (rel->r_info);
2311
1049f94e 2312 if (info->relocatable)
252b5132 2313 {
4a335f3d 2314 bfd_vma val;
4a335f3d
AM		 2315 bfd_byte *where;
2316
0ac8d2ca 2317 /* This is a relocatable link. We don't have to change
252b5132
RH		 2318 anything, unless the reloc is against a section symbol,
2319 in which case we have to adjust according to where the
2320 section symbol winds up in the output section. */
4a335f3d
AM		 2321 if (r_symndx >= symtab_hdr->sh_info)
2322 continue;
2323
2324 sym = local_syms + r_symndx;
2325 if (ELF_ST_TYPE (sym->st_info) != STT_SECTION)
2326 continue;
2327
2328 sec = local_sections[r_symndx];
2329 val = sec->output_offset;
2330 if (val == 0)
2331 continue;
2332
2333 where = contents + rel->r_offset;
2334 switch (howto->size)
252b5132 2335 {
16a10388 2336 /* FIXME: overflow checks. */
4a335f3d 2337 case 0:
16a10388 2338 val += bfd_get_8 (input_bfd, where);
4a335f3d 2339 bfd_put_8 (input_bfd, val, where);
4a335f3d
AM		 2340 break;
2341 case 1:
16a10388 2342 val += bfd_get_16 (input_bfd, where);
4a335f3d 2343 bfd_put_16 (input_bfd, val, where);
4a335f3d
AM		 2344 break;
2345 case 2:
2346 val += bfd_get_32 (input_bfd, where);
2347 bfd_put_32 (input_bfd, val, where);
2348 break;
2349 default:
2350 abort ();
252b5132 2351 }
252b5132
RH		 2352 continue;
2353 }
2354
2355 /* This is a final link. */
2356 h = NULL;
2357 sym = NULL;
2358 sec = NULL;
b34976b6 2359 unresolved_reloc = FALSE;
252b5132
RH		 2360 if (r_symndx < symtab_hdr->sh_info)
2361 {
2362 sym = local_syms + r_symndx;
2363 sec = local_sections[r_symndx];
2364 relocation = (sec->output_section->vma
2365 + sec->output_offset
2366 + sym->st_value);
f8df10f4
JJ		 2367 if ((sec->flags & SEC_MERGE)
2368 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
2369 {
2370 asection *msec;
2371 bfd_vma addend;
4a335f3d 2372 bfd_byte *where = contents + rel->r_offset;
f8df10f4 2373
4a335f3d 2374 switch (howto->size)
f8df10f4 2375 {
4a335f3d
AM		 2376 case 0:
2377 addend = bfd_get_8 (input_bfd, where);
2378 if (howto->pc_relative)
2379 {
2380 addend = (addend ^ 0x80) - 0x80;
2381 addend += 1;
2382 }
2383 break;
2384 case 1:
2385 addend = bfd_get_16 (input_bfd, where);
2386 if (howto->pc_relative)
2387 {
2388 addend = (addend ^ 0x8000) - 0x8000;
2389 addend += 2;
2390 }
2391 break;
2392 case 2:
2393 addend = bfd_get_32 (input_bfd, where);
2394 if (howto->pc_relative)
2395 {
2396 addend = (addend ^ 0x80000000) - 0x80000000;
2397 addend += 4;
2398 }
2399 break;
2400 default:
2401 abort ();
f8df10f4
JJ		 2402 }
2403
f8df10f4 2404 msec = sec;
4a335f3d
AM		 2405 addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend);
2406 addend -= relocation;
f8df10f4 2407 addend += msec->output_section->vma + msec->output_offset;
4a335f3d
AM		 2408
2409 switch (howto->size)
2410 {
2411 case 0:
16a10388 2412 /* FIXME: overflow checks. */
4a335f3d
AM		 2413 if (howto->pc_relative)
2414 addend -= 1;
2415 bfd_put_8 (input_bfd, addend, where);
4a335f3d
AM		 2416 break;
2417 case 1:
2418 if (howto->pc_relative)
2419 addend -= 2;
2420 bfd_put_16 (input_bfd, addend, where);
4a335f3d
AM		 2421 break;
2422 case 2:
2423 if (howto->pc_relative)
2424 addend -= 4;
2425 bfd_put_32 (input_bfd, addend, where);
2426 break;
2427 }
f8df10f4 2428 }
252b5132
RH		 2429 }
2430 else
2431 {
560e09e9 2432 bfd_boolean warned;
ffb2e45b 2433
b2a8e766
AM		 2434 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2435 r_symndx, symtab_hdr, sym_hashes,
2436 h, sec, relocation,
2437 unresolved_reloc, warned);
252b5132
RH		 2438 }
2439
9635fe29
AM		 2440 if (r_symndx == 0)
2441 {
2442 /* r_symndx will be zero only for relocs against symbols from
2443 removed linkonce sections, or sections discarded by a linker
2444 script. For these relocs, we just want the section contents
2445 zeroed. Avoid any special processing in the switch below. */
2446 r_type = R_386_NONE;
2447
2448 relocation = 0;
2449 if (howto->pc_relative)
2450 relocation = (input_section->output_section->vma
2451 + input_section->output_offset
2452 + rel->r_offset);
2453 }
2454
252b5132
RH		 2455 switch (r_type)
2456 {
2457 case R_386_GOT32:
2458 /* Relocation is to the entry for this symbol in the global
2459 offset table. */
ffb2e45b
AM		 2460 if (htab->sgot == NULL)
2461 abort ();
252b5132
RH		 2462
2463 if (h != NULL)
2464 {
b34976b6 2465 bfd_boolean dyn;
252b5132
RH		 2466
2467 off = h->got.offset;
ebe50bae 2468 dyn = htab->elf.dynamic_sections_created;
26e41594 2469 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
252b5132 2470 || (info->shared
586119b3 2471 && SYMBOL_REFERENCES_LOCAL (info, h))
ef5aade5
L		 2472 || (ELF_ST_VISIBILITY (h->other)
2473 && h->root.type == bfd_link_hash_undefweak))
252b5132
RH		 2474 {
2475 /* This is actually a static link, or it is a
2476 -Bsymbolic link and the symbol is defined
2477 locally, or the symbol was forced to be local
2478 because of a version file. We must initialize
2479 this entry in the global offset table. Since the
2480 offset must always be a multiple of 4, we use the
2481 least significant bit to record whether we have
2482 initialized it already.
2483
2484 When doing a dynamic link, we create a .rel.got
2485 relocation entry to initialize the value. This
2486 is done in the finish_dynamic_symbol routine. */
2487 if ((off & 1) != 0)
2488 off &= ~1;
2489 else
2490 {
2491 bfd_put_32 (output_bfd, relocation,
6725bdbf 2492 htab->sgot->contents + off);
252b5132
RH		 2493 h->got.offset |= 1;
2494 }
2495 }
8c694914 2496 else
b34976b6 2497 unresolved_reloc = FALSE;
252b5132
RH		 2498 }
2499 else
2500 {
ffb2e45b
AM		 2501 if (local_got_offsets == NULL)
2502 abort ();
252b5132
RH		 2503
2504 off = local_got_offsets[r_symndx];
2505
2506 /* The offset must always be a multiple of 4. We use
83be169b
AM		 2507 the least significant bit to record whether we have
2508 already generated the necessary reloc. */
252b5132
RH		 2509 if ((off & 1) != 0)
2510 off &= ~1;
2511 else
2512 {
6725bdbf
AM		 2513 bfd_put_32 (output_bfd, relocation,
2514 htab->sgot->contents + off);
252b5132
RH		 2515
2516 if (info->shared)
2517 {
947216bf
AM		 2518 asection *s;
2519 Elf_Internal_Rela outrel;
2520 bfd_byte *loc;
252b5132 2521
947216bf
AM		 2522 s = htab->srelgot;
2523 if (s == NULL)
ffb2e45b 2524 abort ();
252b5132 2525
6725bdbf
AM		 2526 outrel.r_offset = (htab->sgot->output_section->vma
2527 + htab->sgot->output_offset
252b5132
RH		 2528 + off);
2529 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
947216bf
AM		 2530 loc = s->contents;
2531 loc += s->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 2532 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2533 }
2534
2535 local_got_offsets[r_symndx] |= 1;
2536 }
252b5132
RH		 2537 }
2538
ffb2e45b
AM		 2539 if (off >= (bfd_vma) -2)
2540 abort ();
2541
8c37241b
JJ		 2542 relocation = htab->sgot->output_section->vma
2543 + htab->sgot->output_offset + off
2544 - htab->sgotplt->output_section->vma
2545 - htab->sgotplt->output_offset;
252b5132
RH		 2546 break;
2547
2548 case R_386_GOTOFF:
2549 /* Relocation is relative to the start of the global offset
2550 table. */
2551
90f487df
L		 2552 /* Check to make sure it isn't a protected function symbol
2553 for shared library since it may not be local when used
2554 as function address. */
2555 if (info->shared
8fe76924 2556 && !info->executable
90f487df
L		 2557 && h
2558 && h->def_regular
2559 && h->type == STT_FUNC
2560 && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED)
2561 {
2562 (*_bfd_error_handler)
2563 (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"),
2564 input_bfd, h->root.root.string);
2565 bfd_set_error (bfd_error_bad_value);
2566 return FALSE;
2567 }
2568
8c37241b
JJ		 2569 /* Note that sgot is not involved in this
2570 calculation. We always want the start of .got.plt. If we
2571 defined _GLOBAL_OFFSET_TABLE_ in a different way, as is
252b5132
RH		 2572 permitted by the ABI, we might have to change this
2573 calculation. */
8c37241b
JJ		 2574 relocation -= htab->sgotplt->output_section->vma
2575 + htab->sgotplt->output_offset;
252b5132
RH		 2576 break;
2577
2578 case R_386_GOTPC:
2579 /* Use global offset table as symbol value. */
8c37241b
JJ		 2580 relocation = htab->sgotplt->output_section->vma
2581 + htab->sgotplt->output_offset;
b34976b6 2582 unresolved_reloc = FALSE;
252b5132
RH		 2583 break;
2584
2585 case R_386_PLT32:
2586 /* Relocation is to the entry for this symbol in the
2587 procedure linkage table. */
2588
dd5724d5 2589 /* Resolve a PLT32 reloc against a local symbol directly,
83be169b 2590 without using the procedure linkage table. */
252b5132
RH		 2591 if (h == NULL)
2592 break;
2593
dd5724d5 2594 if (h->plt.offset == (bfd_vma) -1
6725bdbf 2595 || htab->splt == NULL)
252b5132
RH		 2596 {
2597 /* We didn't make a PLT entry for this symbol. This
83be169b
AM		 2598 happens when statically linking PIC code, or when
2599 using -Bsymbolic. */
252b5132
RH		 2600 break;
2601 }
2602
6725bdbf
AM		 2603 relocation = (htab->splt->output_section->vma
2604 + htab->splt->output_offset
252b5132 2605 + h->plt.offset);
b34976b6 2606 unresolved_reloc = FALSE;
252b5132
RH		 2607 break;
2608
2609 case R_386_32:
2610 case R_386_PC32:
f855931b 2611 if ((input_section->flags & SEC_ALLOC) == 0)
ec338859
AM		 2612 break;
2613
12d0ee4a 2614 if ((info->shared
ef5aade5
L		 2615 && (h == NULL
2616 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2617 || h->root.type != bfd_link_hash_undefweak)
12d0ee4a 2618 && (r_type != R_386_PC32
f6c52c13 2619 || !SYMBOL_CALLS_LOCAL (info, h)))
a23b6845
AM		 2620 || (ELIMINATE_COPY_RELOCS
2621 && !info->shared
12d0ee4a
AM		 2622 && h != NULL
2623 && h->dynindx != -1
f5385ebf
AM		 2624 && !h->non_got_ref
2625 && ((h->def_dynamic
2626 && !h->def_regular)
28d0b90e
AM		 2627 || h->root.type == bfd_link_hash_undefweak
2628 || h->root.type == bfd_link_hash_undefined)))
252b5132 2629 {
947216bf
AM		 2630 Elf_Internal_Rela outrel;
2631 bfd_byte *loc;
b34976b6 2632 bfd_boolean skip, relocate;
0c715baa 2633 asection *sreloc;
252b5132
RH		 2634
2635 /* When generating a shared object, these relocations
2636 are copied into the output file to be resolved at run
2637 time. */
2638
b34976b6
AM		 2639 skip = FALSE;
2640 relocate = FALSE;
252b5132 2641
c629eae0
JJ		 2642 outrel.r_offset =
2643 _bfd_elf_section_offset (output_bfd, info, input_section,
2644 rel->r_offset);
2645 if (outrel.r_offset == (bfd_vma) -1)
b34976b6 2646 skip = TRUE;
0bb2d96a 2647 else if (outrel.r_offset == (bfd_vma) -2)
b34976b6 2648 skip = TRUE, relocate = TRUE;
252b5132
RH		 2649 outrel.r_offset += (input_section->output_section->vma
2650 + input_section->output_offset);
2651
2652 if (skip)
0bb2d96a 2653 memset (&outrel, 0, sizeof outrel);
5a15f56f
AM		 2654 else if (h != NULL
2655 && h->dynindx != -1
2656 && (r_type == R_386_PC32
2657 || !info->shared
2658 || !info->symbolic
f5385ebf 2659 || !h->def_regular))
0bb2d96a 2660 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
252b5132
RH		 2661 else
2662 {
5a15f56f 2663 /* This symbol is local, or marked to become local. */
b34976b6 2664 relocate = TRUE;
5a15f56f 2665 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
252b5132
RH		 2666 }
2667
0c715baa
AM		 2668 sreloc = elf_section_data (input_section)->sreloc;
2669 if (sreloc == NULL)
2670 abort ();
2671
947216bf
AM		 2672 loc = sreloc->contents;
2673 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
0c715baa 2674 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
252b5132
RH		 2675
2676 /* If this reloc is against an external symbol, we do
2677 not want to fiddle with the addend. Otherwise, we
2678 need to include the symbol value so that it becomes
2679 an addend for the dynamic reloc. */
2680 if (! relocate)
2681 continue;
2682 }
252b5132
RH		 2683 break;
2684
37e55690
JJ		 2685 case R_386_TLS_IE:
2686 if (info->shared)
2687 {
947216bf
AM		 2688 Elf_Internal_Rela outrel;
2689 bfd_byte *loc;
37e55690 2690 asection *sreloc;
37e55690
JJ		 2691
2692 outrel.r_offset = rel->r_offset
2693 + input_section->output_section->vma
2694 + input_section->output_offset;
2695 outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
2696 sreloc = elf_section_data (input_section)->sreloc;
2697 if (sreloc == NULL)
2698 abort ();
947216bf
AM		 2699 loc = sreloc->contents;
2700 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 2701 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2702 }
2703 /* Fall through */
2704
13ae64f3 2705 case R_386_TLS_GD:
67a4f2b7
AO		 2706 case R_386_TLS_GOTDESC:
2707 case R_386_TLS_DESC_CALL:
13ae64f3 2708 case R_386_TLS_IE_32:
37e55690 2709 case R_386_TLS_GOTIE:
13ae64f3
JJ		 2710 r_type = elf_i386_tls_transition (info, r_type, h == NULL);
2711 tls_type = GOT_UNKNOWN;
2712 if (h == NULL && local_got_offsets)
2713 tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx];
2714 else if (h != NULL)
2715 {
2716 tls_type = elf_i386_hash_entry(h)->tls_type;
cb878726
L		 2717 /* If we have both R_386_TLS_IE and R_386_TLS_GD,
2718 GOT_TLS_IE_BOTH should be used. */
2719 if ((tls_type & GOT_TLS_IE_MASK)
2720 == (GOT_TLS_IE_IE | GOT_TLS_IE_GD))
2721 tls_type = GOT_TLS_IE_BOTH;
2722 else
2723 tls_type &= GOT_TLS_MASK;
37e55690 2724 if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE))
13ae64f3
JJ		 2725 r_type = R_386_TLS_LE_32;
2726 }
37e55690
JJ		 2727 if (tls_type == GOT_TLS_IE)
2728 tls_type = GOT_TLS_IE_NEG;
67a4f2b7
AO		 2729 if (r_type == R_386_TLS_GD
2730 || r_type == R_386_TLS_GOTDESC
2731 || r_type == R_386_TLS_DESC_CALL)
37e55690
JJ		 2732 {
2733 if (tls_type == GOT_TLS_IE_POS)
2734 r_type = R_386_TLS_GOTIE;
2735 else if (tls_type & GOT_TLS_IE)
2736 r_type = R_386_TLS_IE_32;
2737 }
13ae64f3
JJ		 2738
2739 if (r_type == R_386_TLS_LE_32)
2740 {
82e51918 2741 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 2742 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
2743 {
2744 unsigned int val, type;
2745 bfd_vma roff;
2746
2747 /* GD->LE transition. */
2748 BFD_ASSERT (rel->r_offset >= 2);
2749 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2750 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 2751 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 2752 BFD_ASSERT (bfd_get_8 (input_bfd,
2753 contents + rel->r_offset + 4)
2754 == 0xe8);
2755 BFD_ASSERT (rel + 1 < relend);
2756 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
2757 roff = rel->r_offset + 5;
2758 val = bfd_get_8 (input_bfd,
2759 contents + rel->r_offset - 1);
2760 if (type == 0x04)
2761 {
2762 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
2763 Change it into:
2764 movl %gs:0, %eax; subl $foo@tpoff, %eax
2765 (6 byte form of subl). */
2766 BFD_ASSERT (rel->r_offset >= 3);
2767 BFD_ASSERT (bfd_get_8 (input_bfd,
2768 contents + rel->r_offset - 3)
2769 == 0x8d);
2770 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
2771 memcpy (contents + rel->r_offset - 3,
2772 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2773 }
2774 else
2775 {
2776 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 2777 if (rel->r_offset + 10 <= input_section->size
13ae64f3
JJ		 2778 && bfd_get_8 (input_bfd,
2779 contents + rel->r_offset + 9) == 0x90)
2780 {
2781 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
2782 Change it into:
2783 movl %gs:0, %eax; subl $foo@tpoff, %eax
2784 (6 byte form of subl). */
2785 memcpy (contents + rel->r_offset - 2,
2786 "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12);
2787 roff = rel->r_offset + 6;
2788 }
2789 else
2790 {
2791 /* leal foo(%reg), %eax; call ___tls_get_addr
2792 Change it into:
2793 movl %gs:0, %eax; subl $foo@tpoff, %eax
2794 (5 byte form of subl). */
2795 memcpy (contents + rel->r_offset - 2,
2796 "\x65\xa1\0\0\0\0\x2d\0\0\0", 11);
2797 }
2798 }
2799 bfd_put_32 (output_bfd, tpoff (info, relocation),
2800 contents + roff);
2801 /* Skip R_386_PLT32. */
2802 rel++;
2803 continue;
2804 }
67a4f2b7
AO		 2805 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
2806 {
2807 /* GDesc -> LE transition.
2808 It's originally something like:
2809 leal x@tlsdesc(%ebx), %eax
2810
2811 leal x@ntpoff, %eax
2812
2813 Registers other than %eax may be set up here. */
2814
2815 unsigned int val, type;
2816 bfd_vma roff;
2817
2818 /* First, make sure it's a leal adding ebx to a
2819 32-bit offset into any register, although it's
2820 probably almost always going to be eax. */
2821 roff = rel->r_offset;
2822 BFD_ASSERT (roff >= 2);
2823 type = bfd_get_8 (input_bfd, contents + roff - 2);
2824 BFD_ASSERT (type == 0x8d);
2825 val = bfd_get_8 (input_bfd, contents + roff - 1);
2826 BFD_ASSERT ((val & 0xc7) == 0x83);
2827 BFD_ASSERT (roff + 4 <= input_section->size);
2828
2829 /* Now modify the instruction as appropriate. */
2830 /* aoliva FIXME: remove the above and xor the byte
2831 below with 0x86. */
2832 bfd_put_8 (output_bfd, val ^ 0x86,
2833 contents + roff - 1);
2834 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2835 contents + roff);
2836 continue;
2837 }
2838 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
2839 {
2840 /* GDesc -> LE transition.
2841 It's originally:
2842 call *(%eax)
2843 Turn it into:
2844 nop; nop */
2845
2846 unsigned int val, type;
2847 bfd_vma roff;
2848
2849 /* First, make sure it's a call *(%eax). */
2850 roff = rel->r_offset;
2851 BFD_ASSERT (roff + 2 <= input_section->size);
2852 type = bfd_get_8 (input_bfd, contents + roff);
2853 BFD_ASSERT (type == 0xff);
2854 val = bfd_get_8 (input_bfd, contents + roff + 1);
2855 BFD_ASSERT (val == 0x10);
2856
2857 /* Now modify the instruction as appropriate. */
2858 bfd_put_8 (output_bfd, 0x90, contents + roff);
2859 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
2860 continue;
2861 }
37e55690 2862 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE)
13ae64f3
JJ		 2863 {
2864 unsigned int val, type;
2865
2866 /* IE->LE transition:
37e55690
JJ		 2867 Originally it can be one of:
2868 movl foo, %eax
2869 movl foo, %reg
2870 addl foo, %reg
2871 We change it into:
2872 movl $foo, %eax
2873 movl $foo, %reg
2874 addl $foo, %reg. */
2875 BFD_ASSERT (rel->r_offset >= 1);
2876 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2877 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690
JJ		 2878 if (val == 0xa1)
2879 {
2880 /* movl foo, %eax. */
55fd94b0
AM		 2881 bfd_put_8 (output_bfd, 0xb8,
2882 contents + rel->r_offset - 1);
37e55690 2883 }
299bf759 2884 else
37e55690 2885 {
299bf759 2886 BFD_ASSERT (rel->r_offset >= 2);
55fd94b0
AM		 2887 type = bfd_get_8 (input_bfd,
2888 contents + rel->r_offset - 2);
299bf759 2889 switch (type)
26e41594 2890 {
299bf759
L		 2891 case 0x8b:
2892 /* movl */
2893 BFD_ASSERT ((val & 0xc7) == 0x05);
2894 bfd_put_8 (output_bfd, 0xc7,
2895 contents + rel->r_offset - 2);
2896 bfd_put_8 (output_bfd,
2897 0xc0 | ((val >> 3) & 7),
2898 contents + rel->r_offset - 1);
2899 break;
2900 case 0x03:
2901 /* addl */
2902 BFD_ASSERT ((val & 0xc7) == 0x05);
2903 bfd_put_8 (output_bfd, 0x81,
2904 contents + rel->r_offset - 2);
2905 bfd_put_8 (output_bfd,
2906 0xc0 | ((val >> 3) & 7),
2907 contents + rel->r_offset - 1);
2908 break;
2909 default:
2910 BFD_FAIL ();
2911 break;
26e41594 2912 }
37e55690 2913 }
37e55690
JJ		 2914 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2915 contents + rel->r_offset);
2916 continue;
2917 }
2918 else
2919 {
2920 unsigned int val, type;
2921
2922 /* {IE_32,GOTIE}->LE transition:
2923 Originally it can be one of:
13ae64f3 2924 subl foo(%reg1), %reg2
13ae64f3 2925 movl foo(%reg1), %reg2
37e55690 2926 addl foo(%reg1), %reg2
13ae64f3
JJ		 2927 We change it into:
2928 subl $foo, %reg2
37e55690
JJ		 2929 movl $foo, %reg2 (6 byte form)
2930 addl $foo, %reg2. */
13ae64f3
JJ		 2931 BFD_ASSERT (rel->r_offset >= 2);
2932 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
2933 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
eea6121a 2934 BFD_ASSERT (rel->r_offset + 4 <= input_section->size);
37e55690 2935 BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4);
13ae64f3
JJ		 2936 if (type == 0x8b)
2937 {
2938 /* movl */
13ae64f3
JJ		 2939 bfd_put_8 (output_bfd, 0xc7,
2940 contents + rel->r_offset - 2);
2941 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2942 contents + rel->r_offset - 1);
2943 }
2944 else if (type == 0x2b)
2945 {
2946 /* subl */
13ae64f3
JJ		 2947 bfd_put_8 (output_bfd, 0x81,
2948 contents + rel->r_offset - 2);
2949 bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7),
2950 contents + rel->r_offset - 1);
2951 }
37e55690
JJ		 2952 else if (type == 0x03)
2953 {
2954 /* addl */
2955 bfd_put_8 (output_bfd, 0x81,
2956 contents + rel->r_offset - 2);
2957 bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7),
2958 contents + rel->r_offset - 1);
2959 }
13ae64f3
JJ		 2960 else
2961 BFD_FAIL ();
37e55690
JJ		 2962 if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE)
2963 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2964 contents + rel->r_offset);
2965 else
2966 bfd_put_32 (output_bfd, tpoff (info, relocation),
2967 contents + rel->r_offset);
13ae64f3
JJ		 2968 continue;
2969 }
2970 }
2971
2972 if (htab->sgot == NULL)
2973 abort ();
2974
2975 if (h != NULL)
67a4f2b7
AO		 2976 {
2977 off = h->got.offset;
2978 offplt = elf_i386_hash_entry (h)->tlsdesc_got;
2979 }
13ae64f3
JJ		 2980 else
2981 {
2982 if (local_got_offsets == NULL)
2983 abort ();
2984
2985 off = local_got_offsets[r_symndx];
67a4f2b7 2986 offplt = local_tlsdesc_gotents[r_symndx];
13ae64f3
JJ		 2987 }
2988
2989 if ((off & 1) != 0)
2990 off &= ~1;
26e41594 2991 else
13ae64f3 2992 {
947216bf
AM		 2993 Elf_Internal_Rela outrel;
2994 bfd_byte *loc;
13ae64f3 2995 int dr_type, indx;
67a4f2b7 2996 asection *sreloc;
13ae64f3
JJ		 2997
2998 if (htab->srelgot == NULL)
2999 abort ();
3000
67a4f2b7
AO		 3001 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3002
3003 if (GOT_TLS_GDESC_P (tls_type))
3004 {
3005 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC);
3006 BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8
3007 <= htab->sgotplt->size);
3008 outrel.r_offset = (htab->sgotplt->output_section->vma
3009 + htab->sgotplt->output_offset
3010 + offplt
3011 + htab->sgotplt_jump_table_size);
3012 sreloc = htab->srelplt;
3013 loc = sreloc->contents;
5ae0bfb6
RS		 3014 loc += (htab->next_tls_desc_index++
3015 * sizeof (Elf32_External_Rel));
67a4f2b7
AO		 3016 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3017 <= sreloc->contents + sreloc->size);
3018 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3019 if (indx == 0)
3020 {
3021 BFD_ASSERT (! unresolved_reloc);
3022 bfd_put_32 (output_bfd,
3023 relocation - dtpoff_base (info),
3024 htab->sgotplt->contents + offplt
3025 + htab->sgotplt_jump_table_size + 4);
3026 }
3027 else
3028 {
3029 bfd_put_32 (output_bfd, 0,
3030 htab->sgotplt->contents + offplt
3031 + htab->sgotplt_jump_table_size + 4);
3032 }
3033 }
3034
3035 sreloc = htab->srelgot;
3036
13ae64f3
JJ		 3037 outrel.r_offset = (htab->sgot->output_section->vma
3038 + htab->sgot->output_offset + off);
3039
67a4f2b7 3040 if (GOT_TLS_GD_P (tls_type))
13ae64f3 3041 dr_type = R_386_TLS_DTPMOD32;
67a4f2b7
AO		 3042 else if (GOT_TLS_GDESC_P (tls_type))
3043 goto dr_done;
37e55690
JJ		 3044 else if (tls_type == GOT_TLS_IE_POS)
3045 dr_type = R_386_TLS_TPOFF;
13ae64f3
JJ		 3046 else
3047 dr_type = R_386_TLS_TPOFF32;
67a4f2b7 3048
37e55690
JJ		 3049 if (dr_type == R_386_TLS_TPOFF && indx == 0)
3050 bfd_put_32 (output_bfd, relocation - dtpoff_base (info),
3051 htab->sgot->contents + off);
3052 else if (dr_type == R_386_TLS_TPOFF32 && indx == 0)
c5c1f40c 3053 bfd_put_32 (output_bfd, dtpoff_base (info) - relocation,
c366c25e 3054 htab->sgot->contents + off);
67a4f2b7 3055 else if (dr_type != R_386_TLS_DESC)
c366c25e
JJ		 3056 bfd_put_32 (output_bfd, 0,
3057 htab->sgot->contents + off);
13ae64f3 3058 outrel.r_info = ELF32_R_INFO (indx, dr_type);
67a4f2b7
AO		 3059
3060 loc = sreloc->contents;
3061 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
3062 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3063 <= sreloc->contents + sreloc->size);
13ae64f3
JJ		 3064 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3065
67a4f2b7 3066 if (GOT_TLS_GD_P (tls_type))
13ae64f3
JJ		 3067 {
3068 if (indx == 0)
3069 {
82e51918 3070 BFD_ASSERT (! unresolved_reloc);
13ae64f3
JJ		 3071 bfd_put_32 (output_bfd,
3072 relocation - dtpoff_base (info),
3073 htab->sgot->contents + off + 4);
3074 }
3075 else
3076 {
3077 bfd_put_32 (output_bfd, 0,
3078 htab->sgot->contents + off + 4);
3079 outrel.r_info = ELF32_R_INFO (indx,
3080 R_386_TLS_DTPOFF32);
3081 outrel.r_offset += 4;
67a4f2b7 3082 sreloc->reloc_count++;
947216bf 3083 loc += sizeof (Elf32_External_Rel);
67a4f2b7
AO		 3084 BFD_ASSERT (loc + sizeof (Elf32_External_Rel)
3085 <= sreloc->contents + sreloc->size);
947216bf 3086 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
13ae64f3
JJ		 3087 }
3088 }
37e55690
JJ		 3089 else if (tls_type == GOT_TLS_IE_BOTH)
3090 {
3091 bfd_put_32 (output_bfd,
3092 indx == 0 ? relocation - dtpoff_base (info) : 0,
3093 htab->sgot->contents + off + 4);
3094 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3095 outrel.r_offset += 4;
67a4f2b7 3096 sreloc->reloc_count++;
947216bf 3097 loc += sizeof (Elf32_External_Rel);
37e55690
JJ		 3098 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3099 }
13ae64f3 3100
67a4f2b7 3101 dr_done:
13ae64f3
JJ		 3102 if (h != NULL)
3103 h->got.offset |= 1;
3104 else
3105 local_got_offsets[r_symndx] |= 1;
3106 }
3107
67a4f2b7
AO		 3108 if (off >= (bfd_vma) -2
3109 && ! GOT_TLS_GDESC_P (tls_type))
13ae64f3 3110 abort ();
67a4f2b7
AO		 3111 if (r_type == R_386_TLS_GOTDESC
3112 || r_type == R_386_TLS_DESC_CALL)
3113 {
3114 relocation = htab->sgotplt_jump_table_size + offplt;
3115 unresolved_reloc = FALSE;
3116 }
3117 else if (r_type == ELF32_R_TYPE (rel->r_info))
13ae64f3 3118 {
8c37241b
JJ		 3119 bfd_vma g_o_t = htab->sgotplt->output_section->vma
3120 + htab->sgotplt->output_offset;
3121 relocation = htab->sgot->output_section->vma
67a4f2b7 3122 + htab->sgot->output_offset + off - g_o_t;
37e55690
JJ		 3123 if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE)
3124 && tls_type == GOT_TLS_IE_BOTH)
3125 relocation += 4;
3126 if (r_type == R_386_TLS_IE)
8c37241b 3127 relocation += g_o_t;
b34976b6 3128 unresolved_reloc = FALSE;
13ae64f3 3129 }
67a4f2b7 3130 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD)
13ae64f3
JJ		 3131 {
3132 unsigned int val, type;
3133 bfd_vma roff;
3134
3135 /* GD->IE transition. */
3136 BFD_ASSERT (rel->r_offset >= 2);
3137 type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
3138 BFD_ASSERT (type == 0x8d || type == 0x04);
eea6121a 3139 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 3140 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3141 == 0xe8);
3142 BFD_ASSERT (rel + 1 < relend);
3143 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3144 roff = rel->r_offset - 3;
3145 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3146 if (type == 0x04)
3147 {
3148 /* leal foo(,%reg,1), %eax; call ___tls_get_addr
3149 Change it into:
3150 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
3151 BFD_ASSERT (rel->r_offset >= 3);
3152 BFD_ASSERT (bfd_get_8 (input_bfd,
3153 contents + rel->r_offset - 3)
3154 == 0x8d);
3155 BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3));
3156 val >>= 3;
3157 }
3158 else
3159 {
3160 /* leal foo(%reg), %eax; call ___tls_get_addr; nop
3161 Change it into:
3162 movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */
eea6121a 3163 BFD_ASSERT (rel->r_offset + 10 <= input_section->size);
13ae64f3
JJ		 3164 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
3165 BFD_ASSERT (bfd_get_8 (input_bfd,
3166 contents + rel->r_offset + 9)
3167 == 0x90);
3168 roff = rel->r_offset - 2;
3169 }
3170 memcpy (contents + roff,
3171 "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12);
3172 contents[roff + 7] = 0x80 | (val & 7);
37e55690
JJ		 3173 /* If foo is used only with foo@gotntpoff(%reg) and
3174 foo@indntpoff, but not with foo@gottpoff(%reg), change
3175 subl $foo@gottpoff(%reg), %eax
3176 into:
3177 addl $foo@gotntpoff(%reg), %eax. */
3178 if (r_type == R_386_TLS_GOTIE)
3179 {
3180 contents[roff + 6] = 0x03;
3181 if (tls_type == GOT_TLS_IE_BOTH)
3182 off += 4;
3183 }
8c37241b
JJ		 3184 bfd_put_32 (output_bfd,
3185 htab->sgot->output_section->vma
3186 + htab->sgot->output_offset + off
3187 - htab->sgotplt->output_section->vma
3188 - htab->sgotplt->output_offset,
13ae64f3
JJ		 3189 contents + roff + 8);
3190 /* Skip R_386_PLT32. */
3191 rel++;
3192 continue;
3193 }
67a4f2b7
AO		 3194 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC)
3195 {
3196 /* GDesc -> IE transition.
3197 It's originally something like:
3198 leal x@tlsdesc(%ebx), %eax
3199
3200 Change it to:
3201 movl x@gotntpoff(%ebx), %eax # before nop; nop
3202 or:
3203 movl x@gottpoff(%ebx), %eax # before negl %eax
3204
3205 Registers other than %eax may be set up here. */
3206
3207 unsigned int val, type;
3208 bfd_vma roff;
3209
3210 /* First, make sure it's a leal adding ebx to a 32-bit
3211 offset into any register, although it's probably
3212 almost always going to be eax. */
3213 roff = rel->r_offset;
3214 BFD_ASSERT (roff >= 2);
3215 type = bfd_get_8 (input_bfd, contents + roff - 2);
3216 BFD_ASSERT (type == 0x8d);
3217 val = bfd_get_8 (input_bfd, contents + roff - 1);
3218 BFD_ASSERT ((val & 0xc7) == 0x83);
3219 BFD_ASSERT (roff + 4 <= input_section->size);
3220
3221 /* Now modify the instruction as appropriate. */
3222 /* To turn a leal into a movl in the form we use it, it
3223 suffices to change the first byte from 0x8d to 0x8b.
3224 aoliva FIXME: should we decide to keep the leal, all
3225 we have to do is remove the statement below, and
3226 adjust the relaxation of R_386_TLS_DESC_CALL. */
3227 bfd_put_8 (output_bfd, 0x8b, contents + roff - 2);
3228
3229 if (tls_type == GOT_TLS_IE_BOTH)
3230 off += 4;
3231
3232 bfd_put_32 (output_bfd,
3233 htab->sgot->output_section->vma
3234 + htab->sgot->output_offset + off
3235 - htab->sgotplt->output_section->vma
3236 - htab->sgotplt->output_offset,
3237 contents + roff);
3238 continue;
3239 }
3240 else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL)
3241 {
3242 /* GDesc -> IE transition.
3243 It's originally:
3244 call *(%eax)
3245
3246 Change it to:
3247 nop; nop
3248 or
3249 negl %eax
3250 depending on how we transformed the TLS_GOTDESC above.
3251 */
3252
3253 unsigned int val, type;
3254 bfd_vma roff;
3255
3256 /* First, make sure it's a call *(%eax). */
3257 roff = rel->r_offset;
3258 BFD_ASSERT (roff + 2 <= input_section->size);
3259 type = bfd_get_8 (input_bfd, contents + roff);
3260 BFD_ASSERT (type == 0xff);
3261 val = bfd_get_8 (input_bfd, contents + roff + 1);
3262 BFD_ASSERT (val == 0x10);
3263
3264 /* Now modify the instruction as appropriate. */
3265 if (tls_type != GOT_TLS_IE_NEG)
3266 {
3267 /* nop; nop */
3268 bfd_put_8 (output_bfd, 0x90, contents + roff);
3269 bfd_put_8 (output_bfd, 0x90, contents + roff + 1);
3270 }
3271 else
3272 {
3273 /* negl %eax */
3274 bfd_put_8 (output_bfd, 0xf7, contents + roff);
3275 bfd_put_8 (output_bfd, 0xd8, contents + roff + 1);
3276 }
3277
3278 continue;
3279 }
3280 else
3281 BFD_ASSERT (FALSE);
13ae64f3
JJ		 3282 break;
3283
3284 case R_386_TLS_LDM:
3285 if (! info->shared)
3286 {
3287 unsigned int val;
3288
3289 /* LD->LE transition:
3290 Ensure it is:
3291 leal foo(%reg), %eax; call ___tls_get_addr.
3292 We change it into:
3293 movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */
3294 BFD_ASSERT (rel->r_offset >= 2);
3295 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
3296 == 0x8d);
3297 val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
3298 BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4);
eea6121a 3299 BFD_ASSERT (rel->r_offset + 9 <= input_section->size);
13ae64f3
JJ		 3300 BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
3301 == 0xe8);
3302 BFD_ASSERT (rel + 1 < relend);
3303 BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32);
3304 memcpy (contents + rel->r_offset - 2,
3305 "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11);
3306 /* Skip R_386_PLT32. */
3307 rel++;
3308 continue;
3309 }
3310
3311 if (htab->sgot == NULL)
3312 abort ();
3313
3314 off = htab->tls_ldm_got.offset;
3315 if (off & 1)
3316 off &= ~1;
3317 else
3318 {
947216bf
AM		 3319 Elf_Internal_Rela outrel;
3320 bfd_byte *loc;
13ae64f3
JJ		 3321
3322 if (htab->srelgot == NULL)
3323 abort ();
3324
3325 outrel.r_offset = (htab->sgot->output_section->vma
3326 + htab->sgot->output_offset + off);
3327
3328 bfd_put_32 (output_bfd, 0,
3329 htab->sgot->contents + off);
3330 bfd_put_32 (output_bfd, 0,
3331 htab->sgot->contents + off + 4);
3332 outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32);
947216bf
AM		 3333 loc = htab->srelgot->contents;
3334 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
13ae64f3
JJ		 3335 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3336 htab->tls_ldm_got.offset |= 1;
3337 }
8c37241b
JJ		 3338 relocation = htab->sgot->output_section->vma
3339 + htab->sgot->output_offset + off
3340 - htab->sgotplt->output_section->vma
3341 - htab->sgotplt->output_offset;
b34976b6 3342 unresolved_reloc = FALSE;
13ae64f3
JJ		 3343 break;
3344
3345 case R_386_TLS_LDO_32:
a45bb67d 3346 if (info->shared || (input_section->flags & SEC_CODE) == 0)
13ae64f3
JJ		 3347 relocation -= dtpoff_base (info);
3348 else
3349 /* When converting LDO to LE, we must negate. */
3350 relocation = -tpoff (info, relocation);
3351 break;
3352
3353 case R_386_TLS_LE_32:
13ae64f3 3354 case R_386_TLS_LE:
37e55690
JJ		 3355 if (info->shared)
3356 {
947216bf 3357 Elf_Internal_Rela outrel;
37e55690 3358 asection *sreloc;
947216bf 3359 bfd_byte *loc;
37e55690
JJ		 3360 int indx;
3361
3362 outrel.r_offset = rel->r_offset
3363 + input_section->output_section->vma
3364 + input_section->output_offset;
3365 if (h != NULL && h->dynindx != -1)
3366 indx = h->dynindx;
3367 else
3368 indx = 0;
3369 if (r_type == R_386_TLS_LE_32)
3370 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32);
3371 else
3372 outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF);
3373 sreloc = elf_section_data (input_section)->sreloc;
3374 if (sreloc == NULL)
3375 abort ();
947216bf
AM		 3376 loc = sreloc->contents;
3377 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel);
37e55690
JJ		 3378 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
3379 if (indx)
3380 continue;
3381 else if (r_type == R_386_TLS_LE_32)
3382 relocation = dtpoff_base (info) - relocation;
3383 else
3384 relocation -= dtpoff_base (info);
3385 }
3386 else if (r_type == R_386_TLS_LE_32)
3387 relocation = tpoff (info, relocation);
3388 else
3389 relocation = -tpoff (info, relocation);
13ae64f3
JJ		 3390 break;
3391
252b5132
RH		 3392 default:
3393 break;
3394 }
3395
239e1f3a
AM		 3396 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3397 because such sections are not SEC_ALLOC and thus ld.so will
3398 not process them. */
8c694914 3399 if (unresolved_reloc
239e1f3a 3400 && !((input_section->flags & SEC_DEBUGGING) != 0
f5385ebf 3401 && h->def_dynamic))
6a30718d
JJ		 3402 {
3403 (*_bfd_error_handler)
843fe662 3404 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
d003868e
AM		 3405 input_bfd,
3406 input_section,
6a30718d 3407 (long) rel->r_offset,
843fe662 3408 howto->name,
6a30718d 3409 h->root.root.string);
b34976b6 3410 return FALSE;
6a30718d 3411 }
83be169b 3412
252b5132
RH		 3413 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3414 contents, rel->r_offset,
55fd94b0 3415 relocation, 0);
252b5132 3416
cf5c0c5b 3417 if (r != bfd_reloc_ok)
252b5132 3418 {
cf5c0c5b 3419 const char *name;
ffb2e45b 3420
cf5c0c5b
AM		 3421 if (h != NULL)
3422 name = h->root.root.string;
3423 else
3424 {
3425 name = bfd_elf_string_from_elf_section (input_bfd,
3426 symtab_hdr->sh_link,
3427 sym->st_name);
3428 if (name == NULL)
b34976b6 3429 return FALSE;
cf5c0c5b
AM		 3430 if (*name == '\0')
3431 name = bfd_section_name (input_bfd, sec);
3432 }
ffb2e45b 3433
cf5c0c5b
AM		 3434 if (r == bfd_reloc_overflow)
3435 {
cf5c0c5b 3436 if (! ((*info->callbacks->reloc_overflow)
dfeffb9f
L		 3437 (info, (h ? &h->root : NULL), name, howto->name,
3438 (bfd_vma) 0, input_bfd, input_section,
3439 rel->r_offset)))
b34976b6 3440 return FALSE;
cf5c0c5b
AM		 3441 }
3442 else
3443 {
3444 (*_bfd_error_handler)
d003868e
AM		 3445 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3446 input_bfd, input_section,
cf5c0c5b 3447 (long) rel->r_offset, name, (int) r);
b34976b6 3448 return FALSE;
cf5c0c5b 3449 }
252b5132
RH		 3450 }
3451 }
3452
b34976b6 3453 return TRUE;
252b5132
RH		 3454}
3455
3456/* Finish up dynamic symbol handling. We set the contents of various
3457 dynamic sections here. */
3458
b34976b6 3459static bfd_boolean
55fd94b0
AM		 3460elf_i386_finish_dynamic_symbol (bfd *output_bfd,
3461 struct bfd_link_info *info,
3462 struct elf_link_hash_entry *h,
3463 Elf_Internal_Sym *sym)
252b5132 3464{
6725bdbf 3465 struct elf_i386_link_hash_table *htab;
252b5132 3466
6725bdbf 3467 htab = elf_i386_hash_table (info);
252b5132
RH		 3468
3469 if (h->plt.offset != (bfd_vma) -1)
3470 {
252b5132
RH		 3471 bfd_vma plt_index;
3472 bfd_vma got_offset;
947216bf
AM		 3473 Elf_Internal_Rela rel;
3474 bfd_byte *loc;
252b5132
RH		 3475
3476 /* This symbol has an entry in the procedure linkage table. Set
3477 it up. */
3478
ffb2e45b
AM		 3479 if (h->dynindx == -1
3480 || htab->splt == NULL
3481 || htab->sgotplt == NULL
3482 || htab->srelplt == NULL)
3483 abort ();
252b5132
RH		 3484
3485 /* Get the index in the procedure linkage table which
3486 corresponds to this symbol. This is the index of this symbol
3487 in all the symbols for which we are making plt entries. The
3488 first entry in the procedure linkage table is reserved. */
3489 plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1;
3490
3491 /* Get the offset into the .got table of the entry that
3492 corresponds to this function. Each .got entry is 4 bytes.
3493 The first three are reserved. */
3494 got_offset = (plt_index + 3) * 4;
3495
3496 /* Fill in the entry in the procedure linkage table. */
3497 if (! info->shared)
3498 {
6725bdbf 3499 memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry,
252b5132
RH		 3500 PLT_ENTRY_SIZE);
3501 bfd_put_32 (output_bfd,
6725bdbf
AM		 3502 (htab->sgotplt->output_section->vma
3503 + htab->sgotplt->output_offset
252b5132 3504 + got_offset),
6725bdbf 3505 htab->splt->contents + h->plt.offset + 2);
eac338cf
PB		 3506
3507 if (htab->is_vxworks)
3508 {
3509 int s, k, reloc_index;
3510
3511 /* Create the R_386_32 relocation referencing the GOT
3512 for this PLT entry. */
3513
3514 /* S: Current slot number (zero-based). */
3515 s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3516 /* K: Number of relocations for PLTResolve. */
3517 if (info->shared)
3518 k = PLTRESOLVE_RELOCS_SHLIB;
3519 else
3520 k = PLTRESOLVE_RELOCS;
3521 /* Skip the PLTresolve relocations, and the relocations for
3522 the other PLT slots. */
3523 reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS;
3524 loc = (htab->srelplt2->contents + reloc_index
3525 * sizeof (Elf32_External_Rel));
3526
3527 rel.r_offset = (htab->splt->output_section->vma
3528 + htab->splt->output_offset
3529 + h->plt.offset + 2),
7325306f 3530 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3531 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
3532
3533 /* Create the R_386_32 relocation referencing the beginning of
3534 the PLT for this GOT entry. */
3535 rel.r_offset = (htab->sgotplt->output_section->vma
3536 + htab->sgotplt->output_offset
3537 + got_offset);
7325306f 3538 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 3539 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3540 loc + sizeof (Elf32_External_Rel));
3541 }
252b5132
RH		 3542 }
3543 else
3544 {
6725bdbf 3545 memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry,
252b5132
RH		 3546 PLT_ENTRY_SIZE);
3547 bfd_put_32 (output_bfd, got_offset,
6725bdbf 3548 htab->splt->contents + h->plt.offset + 2);
252b5132
RH		 3549 }
3550
3551 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel),
6725bdbf 3552 htab->splt->contents + h->plt.offset + 7);
252b5132 3553 bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE),
6725bdbf 3554 htab->splt->contents + h->plt.offset + 12);
252b5132
RH		 3555
3556 /* Fill in the entry in the global offset table. */
3557 bfd_put_32 (output_bfd,
6725bdbf
AM		 3558 (htab->splt->output_section->vma
3559 + htab->splt->output_offset
252b5132
RH		 3560 + h->plt.offset
3561 + 6),
6725bdbf 3562 htab->sgotplt->contents + got_offset);
252b5132
RH		 3563
3564 /* Fill in the entry in the .rel.plt section. */
6725bdbf
AM		 3565 rel.r_offset = (htab->sgotplt->output_section->vma
3566 + htab->sgotplt->output_offset
252b5132
RH		 3567 + got_offset);
3568 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT);
947216bf 3569 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel);
0ac8d2ca 3570 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132 3571
f5385ebf 3572 if (!h->def_regular)
252b5132
RH		 3573 {
3574 /* Mark the symbol as undefined, rather than as defined in
c6585bbb
JJ		 3575 the .plt section. Leave the value if there were any
3576 relocations where pointer equality matters (this is a clue
51b64d56
AM		 3577 for the dynamic linker, to make function pointer
3578 comparisons work between an application and shared
c6585bbb
JJ		 3579 library), otherwise set it to zero. If a function is only
3580 called from a binary, there is no need to slow down
3581 shared libraries because of that. */
252b5132 3582 sym->st_shndx = SHN_UNDEF;
f5385ebf 3583 if (!h->pointer_equality_needed)
c6585bbb 3584 sym->st_value = 0;
252b5132
RH		 3585 }
3586 }
3587
13ae64f3 3588 if (h->got.offset != (bfd_vma) -1
67a4f2b7 3589 && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type)
37e55690 3590 && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0)
252b5132 3591 {
947216bf
AM		 3592 Elf_Internal_Rela rel;
3593 bfd_byte *loc;
252b5132
RH		 3594
3595 /* This symbol has an entry in the global offset table. Set it
3596 up. */
3597
ffb2e45b
AM		 3598 if (htab->sgot == NULL || htab->srelgot == NULL)
3599 abort ();
252b5132 3600
6725bdbf
AM		 3601 rel.r_offset = (htab->sgot->output_section->vma
3602 + htab->sgot->output_offset
dc810e39 3603 + (h->got.offset & ~(bfd_vma) 1));
252b5132 3604
dd5724d5
AM		 3605 /* If this is a static link, or it is a -Bsymbolic link and the
3606 symbol is defined locally or was forced to be local because
3607 of a version file, we just want to emit a RELATIVE reloc.
252b5132
RH		 3608 The entry in the global offset table will already have been
3609 initialized in the relocate_section function. */
6725bdbf 3610 if (info->shared
586119b3 3611 && SYMBOL_REFERENCES_LOCAL (info, h))
dd5724d5 3612 {
6725bdbf 3613 BFD_ASSERT((h->got.offset & 1) != 0);
dd5724d5
AM		 3614 rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE);
3615 }
252b5132
RH		 3616 else
3617 {
dd5724d5 3618 BFD_ASSERT((h->got.offset & 1) == 0);
6725bdbf
AM		 3619 bfd_put_32 (output_bfd, (bfd_vma) 0,
3620 htab->sgot->contents + h->got.offset);
252b5132
RH		 3621 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT);
3622 }
3623
947216bf
AM		 3624 loc = htab->srelgot->contents;
3625 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3626 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3627 }
3628
f5385ebf 3629 if (h->needs_copy)
252b5132 3630 {
947216bf
AM		 3631 Elf_Internal_Rela rel;
3632 bfd_byte *loc;
252b5132
RH		 3633
3634 /* This symbol needs a copy reloc. Set it up. */
3635
ffb2e45b
AM		 3636 if (h->dynindx == -1
3637 || (h->root.type != bfd_link_hash_defined
3638 && h->root.type != bfd_link_hash_defweak)
3639 || htab->srelbss == NULL)
3640 abort ();
252b5132
RH		 3641
3642 rel.r_offset = (h->root.u.def.value
3643 + h->root.u.def.section->output_section->vma
3644 + h->root.u.def.section->output_offset);
3645 rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY);
947216bf
AM		 3646 loc = htab->srelbss->contents;
3647 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel);
0ac8d2ca 3648 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
252b5132
RH		 3649 }
3650
eac338cf
PB		 3651 /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.
3652 On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it
3653 is relative to the ".got" section. */
252b5132 3654 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
22edb2f1 3655 || (!htab->is_vxworks && h == htab->elf.hgot))
252b5132
RH		 3656 sym->st_shndx = SHN_ABS;
3657
b34976b6 3658 return TRUE;
252b5132
RH		 3659}
3660
38701953
AM		 3661/* Used to decide how to sort relocs in an optimal manner for the
3662 dynamic linker, before writing them out. */
3663
3664static enum elf_reloc_type_class
55fd94b0 3665elf_i386_reloc_type_class (const Elf_Internal_Rela *rela)
38701953 3666{
55fd94b0 3667 switch (ELF32_R_TYPE (rela->r_info))
38701953
AM		 3668 {
3669 case R_386_RELATIVE:
3670 return reloc_class_relative;
3671 case R_386_JUMP_SLOT:
3672 return reloc_class_plt;
3673 case R_386_COPY:
3674 return reloc_class_copy;
3675 default:
3676 return reloc_class_normal;
3677 }
3678}
3679
252b5132
RH		 3680/* Finish up the dynamic sections. */
3681
b34976b6 3682static bfd_boolean
55fd94b0
AM		 3683elf_i386_finish_dynamic_sections (bfd *output_bfd,
3684 struct bfd_link_info *info)
252b5132 3685{
6725bdbf 3686 struct elf_i386_link_hash_table *htab;
252b5132 3687 bfd *dynobj;
252b5132
RH		 3688 asection *sdyn;
3689
6725bdbf 3690 htab = elf_i386_hash_table (info);
ebe50bae 3691 dynobj = htab->elf.dynobj;
252b5132
RH		 3692 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3693
ebe50bae 3694 if (htab->elf.dynamic_sections_created)
252b5132 3695 {
252b5132
RH		 3696 Elf32_External_Dyn *dyncon, *dynconend;
3697
ffb2e45b
AM		 3698 if (sdyn == NULL || htab->sgot == NULL)
3699 abort ();
252b5132
RH		 3700
3701 dyncon = (Elf32_External_Dyn *) sdyn->contents;
eea6121a 3702 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
252b5132
RH		 3703 for (; dyncon < dynconend; dyncon++)
3704 {
3705 Elf_Internal_Dyn dyn;
51b64d56 3706 asection *s;
252b5132
RH		 3707
3708 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3709
3710 switch (dyn.d_tag)
3711 {
3712 default:
0ac8d2ca 3713 continue;
252b5132
RH		 3714
3715 case DT_PLTGOT:
8c37241b
JJ		 3716 s = htab->sgotplt;
3717 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
6725bdbf
AM		 3718 break;
3719
252b5132 3720 case DT_JMPREL:
6348e046
AM		 3721 s = htab->srelplt;
3722 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
252b5132
RH		 3723 break;
3724
3725 case DT_PLTRELSZ:
6348e046 3726 s = htab->srelplt;
eea6121a 3727 dyn.d_un.d_val = s->size;
252b5132
RH		 3728 break;
3729
3730 case DT_RELSZ:
3731 /* My reading of the SVR4 ABI indicates that the
3732 procedure linkage table relocs (DT_JMPREL) should be
3733 included in the overall relocs (DT_REL). This is
3734 what Solaris does. However, UnixWare can not handle
3735 that case. Therefore, we override the DT_RELSZ entry
6348e046
AM		 3736 here to make it not include the JMPREL relocs. */
3737 s = htab->srelplt;
3738 if (s == NULL)
3739 continue;
eea6121a 3740 dyn.d_un.d_val -= s->size;
6348e046
AM		 3741 break;
3742
3743 case DT_REL:
3744 /* We may not be using the standard ELF linker script.
3745 If .rel.plt is the first .rel section, we adjust
3746 DT_REL to not include it. */
3747 s = htab->srelplt;
3748 if (s == NULL)
3749 continue;
3750 if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset)
3751 continue;
eea6121a 3752 dyn.d_un.d_ptr += s->size;
252b5132
RH		 3753 break;
3754 }
0ac8d2ca
AM		 3755
3756 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
252b5132
RH		 3757 }
3758
3759 /* Fill in the first entry in the procedure linkage table. */
eea6121a 3760 if (htab->splt && htab->splt->size > 0)
252b5132
RH		 3761 {
3762 if (info->shared)
eac338cf
PB		 3763 {
3764 memcpy (htab->splt->contents, elf_i386_pic_plt0_entry,
3765 sizeof (elf_i386_pic_plt0_entry));
3766 memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry),
3767 htab->plt0_pad_byte,
3768 PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry));
3769 }
252b5132
RH		 3770 else
3771 {
eac338cf
PB		 3772 memcpy (htab->splt->contents, elf_i386_plt0_entry,
3773 sizeof(elf_i386_plt0_entry));
3774 memset (htab->splt->contents + sizeof (elf_i386_plt0_entry),
3775 htab->plt0_pad_byte,
3776 PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry));
252b5132 3777 bfd_put_32 (output_bfd,
6725bdbf
AM		 3778 (htab->sgotplt->output_section->vma
3779 + htab->sgotplt->output_offset
3780 + 4),
3781 htab->splt->contents + 2);
252b5132 3782 bfd_put_32 (output_bfd,
6725bdbf
AM		 3783 (htab->sgotplt->output_section->vma
3784 + htab->sgotplt->output_offset
3785 + 8),
3786 htab->splt->contents + 8);
eac338cf
PB		 3787
3788 if (htab->is_vxworks)
3789 {
3790 Elf_Internal_Rela rel;
7325306f 3791
eac338cf
PB		 3792 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4.
3793 On IA32 we use REL relocations so the addend goes in
3794 the PLT directly. */
3795 rel.r_offset = (htab->splt->output_section->vma
3796 + htab->splt->output_offset
3797 + 2);
7325306f 3798 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3799 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3800 htab->srelplt2->contents);
3801 /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */
3802 rel.r_offset = (htab->splt->output_section->vma
3803 + htab->splt->output_offset
3804 + 8);
7325306f 3805 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3806 bfd_elf32_swap_reloc_out (output_bfd, &rel,
3807 htab->srelplt2->contents +
3808 sizeof (Elf32_External_Rel));
3809 }
252b5132
RH		 3810 }
3811
3812 /* UnixWare sets the entsize of .plt to 4, although that doesn't
3813 really seem like the right value. */
6725bdbf
AM		 3814 elf_section_data (htab->splt->output_section)
3815 ->this_hdr.sh_entsize = 4;
eac338cf
PB		 3816
3817 /* Correct the .rel.plt.unloaded relocations. */
3818 if (htab->is_vxworks && !info->shared)
3819 {
3820 int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1;
4c9b0de6 3821 unsigned char *p;
eac338cf
PB		 3822
3823 p = htab->srelplt2->contents;
3824 if (info->shared)
3825 p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel);
3826 else
3827 p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel);
3828
3829 for (; num_plts; num_plts--)
3830 {
3831 Elf_Internal_Rela rel;
3832 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 3833 rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32);
eac338cf
PB		 3834 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3835 p += sizeof (Elf32_External_Rel);
3836
3837 bfd_elf32_swap_reloc_in (output_bfd, p, &rel);
7325306f 3838 rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32);
eac338cf
PB		 3839 bfd_elf32_swap_reloc_out (output_bfd, &rel, p);
3840 p += sizeof (Elf32_External_Rel);
3841 }
3842 }
252b5132
RH		 3843 }
3844 }
3845
12d0ee4a 3846 if (htab->sgotplt)
252b5132 3847 {
12d0ee4a 3848 /* Fill in the first three entries in the global offset table. */
eea6121a 3849 if (htab->sgotplt->size > 0)
12d0ee4a
AM		 3850 {
3851 bfd_put_32 (output_bfd,
55fd94b0 3852 (sdyn == NULL ? 0
12d0ee4a
AM		 3853 : sdyn->output_section->vma + sdyn->output_offset),
3854 htab->sgotplt->contents);
55fd94b0
AM		 3855 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4);
3856 bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8);
12d0ee4a 3857 }
252b5132 3858
12d0ee4a
AM		 3859 elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4;
3860 }
8c37241b 3861
eea6121a 3862 if (htab->sgot && htab->sgot->size > 0)
8c37241b
JJ		 3863 elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4;
3864
b34976b6 3865 return TRUE;
252b5132
RH		 3866}
3867
4c45e5c9
JJ		 3868/* Return address for Ith PLT stub in section PLT, for relocation REL
3869 or (bfd_vma) -1 if it should not be included. */
3870
3871static bfd_vma
3872elf_i386_plt_sym_val (bfd_vma i, const asection *plt,
3873 const arelent *rel ATTRIBUTE_UNUSED)
3874{
3875 return plt->vma + (i + 1) * PLT_ENTRY_SIZE;
3876}
3877
3878
252b5132
RH		 3879#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
3880#define TARGET_LITTLE_NAME "elf32-i386"
3881#define ELF_ARCH bfd_arch_i386
3882#define ELF_MACHINE_CODE EM_386
3883#define ELF_MAXPAGESIZE 0x1000
252b5132
RH		 3884
3885#define elf_backend_can_gc_sections 1
51b64d56 3886#define elf_backend_can_refcount 1
252b5132
RH		 3887#define elf_backend_want_got_plt 1
3888#define elf_backend_plt_readonly 1
3889#define elf_backend_want_plt_sym 0
3890#define elf_backend_got_header_size 12
252b5132 3891
8c29f035
AM		 3892/* Support RELA for objdump of prelink objects. */
3893#define elf_info_to_howto elf_i386_info_to_howto_rel
dd5724d5
AM		 3894#define elf_info_to_howto_rel elf_i386_info_to_howto_rel
3895
13ae64f3 3896#define bfd_elf32_mkobject elf_i386_mkobject
13ae64f3 3897
dd5724d5
AM		 3898#define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name
3899#define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create
3900#define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup
3901
3902#define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol
3903#define elf_backend_check_relocs elf_i386_check_relocs
0ac8d2ca 3904#define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol
6725bdbf 3905#define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections
0ac8d2ca 3906#define elf_backend_fake_sections elf_i386_fake_sections
dd5724d5
AM		 3907#define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections
3908#define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol
3909#define elf_backend_gc_mark_hook elf_i386_gc_mark_hook
3910#define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook
c5fccbec
DJ		 3911#define elf_backend_grok_prstatus elf_i386_grok_prstatus
3912#define elf_backend_grok_psinfo elf_i386_grok_psinfo
db6751f2 3913#define elf_backend_reloc_type_class elf_i386_reloc_type_class
0ac8d2ca
AM		 3914#define elf_backend_relocate_section elf_i386_relocate_section
3915#define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections
67a4f2b7 3916#define elf_backend_always_size_sections elf_i386_always_size_sections
4c45e5c9 3917#define elf_backend_plt_sym_val elf_i386_plt_sym_val
dd5724d5 3918
252b5132 3919#include "elf32-target.h"
2bc3c89a
AM		 3920
3921/* FreeBSD support. */
3922
3923#undef TARGET_LITTLE_SYM
3924#define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec
3925#undef TARGET_LITTLE_NAME
3926#define TARGET_LITTLE_NAME "elf32-i386-freebsd"
3927
3928/* The kernel recognizes executables as valid only if they carry a
3929 "FreeBSD" label in the ELF header. So we put this label on all
3930 executables and (for simplicity) also all other object files. */
3931
2bc3c89a 3932static void
55fd94b0
AM		 3933elf_i386_post_process_headers (bfd *abfd,
3934 struct bfd_link_info *info ATTRIBUTE_UNUSED)
2bc3c89a
AM		 3935{
3936 Elf_Internal_Ehdr *i_ehdrp;
3937
3938 i_ehdrp = elf_elfheader (abfd);
3939
3940 /* Put an ABI label supported by FreeBSD >= 4.1. */
3941 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
3942#ifdef OLD_FREEBSD_ABI_LABEL
3943 /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */
3944 memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8);
caf47ea6 3945#endif
2bc3c89a
AM		 3946}
3947
3948#undef elf_backend_post_process_headers
571fe01f
NC		 3949#define elf_backend_post_process_headers elf_i386_post_process_headers
3950#undef elf32_bed
3951#define elf32_bed elf32_i386_fbsd_bed
2bc3c89a
AM		 3952
3953#include "elf32-target.h"
eac338cf
PB		 3954
3955/* VxWorks support. */
3956
3957#undef TARGET_LITTLE_SYM
3958#define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec
3959#undef TARGET_LITTLE_NAME
3960#define TARGET_LITTLE_NAME "elf32-i386-vxworks"
3961
3962
3963/* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */
3964
3965static struct bfd_link_hash_table *
3966elf_i386_vxworks_link_hash_table_create (bfd *abfd)
3967{
3968 struct bfd_link_hash_table *ret;
3969 struct elf_i386_link_hash_table *htab;
3970
3971 ret = elf_i386_link_hash_table_create (abfd);
3972 if (ret)
3973 {
3974 htab = (struct elf_i386_link_hash_table *) ret;
3975 htab->is_vxworks = 1;
3976 htab->plt0_pad_byte = 0x90;
3977 }
3978
3979 return ret;
3980}
3981
3982
eac338cf
PB		 3983#undef elf_backend_post_process_headers
3984#undef bfd_elf32_bfd_link_hash_table_create
3985#define bfd_elf32_bfd_link_hash_table_create \
3986 elf_i386_vxworks_link_hash_table_create
3987#undef elf_backend_add_symbol_hook
3988#define elf_backend_add_symbol_hook \
3989 elf_vxworks_add_symbol_hook
3990#undef elf_backend_link_output_symbol_hook
3991#define elf_backend_link_output_symbol_hook \
9c72ff84 3992 elf_vxworks_link_output_symbol_hook
eac338cf
PB		 3993#undef elf_backend_emit_relocs
3994#define elf_backend_emit_relocs elf_vxworks_emit_relocs
3995#undef elf_backend_final_write_processing
3996#define elf_backend_final_write_processing \
3997 elf_vxworks_final_write_processing
3998
3999/* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
4000 define it. */
4001#undef elf_backend_want_plt_sym
4002#define elf_backend_want_plt_sym 1
4003
4004#undef elf32_bed
4005#define elf32_bed elf32_i386_vxworks_bed
4006
4007#include "elf32-target.h"
GDB Binutils - Deliverables
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