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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
a2c58332 | 2 | Copyright (C) 1993-2022 Free Software Foundation, Inc. |
252b5132 | 3 | |
571fe01f | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
571fe01f NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 9 | (at your option) any later version. |
252b5132 | 10 | |
571fe01f NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
571fe01f NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
0afcef53 | 21 | #include "elfxx-x86.h" |
eac338cf | 22 | #include "elf-vxworks.h" |
e41b3a13 | 23 | #include "dwarf2.h" |
02a86693 | 24 | #include "opcode/i386.h" |
252b5132 | 25 | |
55fd94b0 AM |
26 | /* 386 uses REL relocations instead of RELA. */ |
27 | #define USE_REL 1 | |
252b5132 | 28 | |
252b5132 RH |
29 | static reloc_howto_type elf_howto_table[]= |
30 | { | |
0a1b45a2 | 31 | HOWTO(R_386_NONE, 0, 3, 0, false, 0, complain_overflow_dont, |
1b452ec6 | 32 | bfd_elf_generic_reloc, "R_386_NONE", |
0a1b45a2 | 33 | true, 0x00000000, 0x00000000, false), |
4c398cc0 | 34 | HOWTO(R_386_32, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 35 | bfd_elf_generic_reloc, "R_386_32", |
0a1b45a2 | 36 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 37 | HOWTO(R_386_PC32, 0, 2, 32, true, 0, complain_overflow_dont, |
1b452ec6 | 38 | bfd_elf_generic_reloc, "R_386_PC32", |
0a1b45a2 | 39 | true, 0xffffffff, 0xffffffff, true), |
4c398cc0 | 40 | HOWTO(R_386_GOT32, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 41 | bfd_elf_generic_reloc, "R_386_GOT32", |
0a1b45a2 | 42 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 43 | HOWTO(R_386_PLT32, 0, 2, 32, true, 0, complain_overflow_dont, |
1b452ec6 | 44 | bfd_elf_generic_reloc, "R_386_PLT32", |
0a1b45a2 | 45 | true, 0xffffffff, 0xffffffff, true), |
4c398cc0 | 46 | HOWTO(R_386_COPY, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 47 | bfd_elf_generic_reloc, "R_386_COPY", |
0a1b45a2 | 48 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 49 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 50 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
0a1b45a2 | 51 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 52 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 53 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
0a1b45a2 | 54 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 55 | HOWTO(R_386_RELATIVE, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 56 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
0a1b45a2 | 57 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 58 | HOWTO(R_386_GOTOFF, 0, 2, 32, false, 0, complain_overflow_dont, |
1b452ec6 | 59 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
0a1b45a2 | 60 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 61 | HOWTO(R_386_GOTPC, 0, 2, 32, true, 0, complain_overflow_dont, |
1b452ec6 | 62 | bfd_elf_generic_reloc, "R_386_GOTPC", |
0a1b45a2 | 63 | true, 0xffffffff, 0xffffffff, true), |
1b452ec6 | 64 | |
dc47f327 AM |
65 | /* We have a gap in the reloc numbers here. |
66 | R_386_standard counts the number up to this point, and | |
67 | R_386_ext_offset is the value to subtract from a reloc type of | |
68 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
69 | #define R_386_standard (R_386_GOTPC + 1) |
70 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 71 | |
37e55690 | 72 | /* These relocs are a GNU extension. */ |
4c398cc0 | 73 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, false, 0, complain_overflow_dont, |
37e55690 | 74 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
0a1b45a2 | 75 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 76 | HOWTO(R_386_TLS_IE, 0, 2, 32, false, 0, complain_overflow_dont, |
37e55690 | 77 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
0a1b45a2 | 78 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 79 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, false, 0, complain_overflow_dont, |
37e55690 | 80 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
0a1b45a2 | 81 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 82 | HOWTO(R_386_TLS_LE, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 83 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
0a1b45a2 | 84 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 85 | HOWTO(R_386_TLS_GD, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 86 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
0a1b45a2 | 87 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 88 | HOWTO(R_386_TLS_LDM, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 89 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
0a1b45a2 AM |
90 | true, 0xffffffff, 0xffffffff, false), |
91 | HOWTO(R_386_16, 0, 1, 16, false, 0, complain_overflow_bitfield, | |
1b452ec6 | 92 | bfd_elf_generic_reloc, "R_386_16", |
0a1b45a2 | 93 | true, 0xffff, 0xffff, false), |
1273b2f8 | 94 | HOWTO(R_386_PC16, 0, 1, 16, true, 0, complain_overflow_bitfield, |
1b452ec6 | 95 | bfd_elf_generic_reloc, "R_386_PC16", |
0a1b45a2 AM |
96 | true, 0xffff, 0xffff, true), |
97 | HOWTO(R_386_8, 0, 0, 8, false, 0, complain_overflow_bitfield, | |
1b452ec6 | 98 | bfd_elf_generic_reloc, "R_386_8", |
0a1b45a2 AM |
99 | true, 0xff, 0xff, false), |
100 | HOWTO(R_386_PC8, 0, 0, 8, true, 0, complain_overflow_signed, | |
1b452ec6 | 101 | bfd_elf_generic_reloc, "R_386_PC8", |
0a1b45a2 | 102 | true, 0xff, 0xff, true), |
dc47f327 | 103 | |
55fd94b0 AM |
104 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
105 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 106 | /* These are common with Solaris TLS implementation. */ |
4c398cc0 | 107 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 108 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
0a1b45a2 | 109 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 110 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 111 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
0a1b45a2 | 112 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 113 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 114 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
0a1b45a2 | 115 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 116 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 117 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
0a1b45a2 | 118 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 119 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 120 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
0a1b45a2 | 121 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 122 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, false, 0, complain_overflow_dont, |
13ae64f3 | 123 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
0a1b45a2 | 124 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 125 | HOWTO(R_386_SIZE32, 0, 2, 32, false, 0, complain_overflow_dont, |
1788fc08 | 126 | bfd_elf_generic_reloc, "R_386_SIZE32", |
0a1b45a2 | 127 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 128 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, false, 0, complain_overflow_dont, |
67a4f2b7 | 129 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", |
0a1b45a2 | 130 | true, 0xffffffff, 0xffffffff, false), |
c21346c5 | 131 | HOWTO(R_386_TLS_DESC_CALL, 0, 3, 0, false, 0, complain_overflow_dont, |
67a4f2b7 | 132 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", |
0a1b45a2 | 133 | false, 0, 0, false), |
4c398cc0 | 134 | HOWTO(R_386_TLS_DESC, 0, 2, 32, false, 0, complain_overflow_dont, |
67a4f2b7 | 135 | bfd_elf_generic_reloc, "R_386_TLS_DESC", |
0a1b45a2 | 136 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 137 | HOWTO(R_386_IRELATIVE, 0, 2, 32, false, 0, complain_overflow_dont, |
cbe950e9 | 138 | bfd_elf_generic_reloc, "R_386_IRELATIVE", |
0a1b45a2 | 139 | true, 0xffffffff, 0xffffffff, false), |
4c398cc0 | 140 | HOWTO(R_386_GOT32X, 0, 2, 32, false, 0, complain_overflow_dont, |
02a86693 | 141 | bfd_elf_generic_reloc, "R_386_GOT32X", |
0a1b45a2 | 142 | true, 0xffffffff, 0xffffffff, false), |
13ae64f3 JJ |
143 | |
144 | /* Another gap. */ | |
02a86693 | 145 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 146 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
147 | |
148 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
149 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
150 | 0, /* rightshift */ | |
151 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
152 | 0, /* bitsize */ | |
0a1b45a2 | 153 | false, /* pc_relative */ |
252b5132 RH |
154 | 0, /* bitpos */ |
155 | complain_overflow_dont, /* complain_on_overflow */ | |
156 | NULL, /* special_function */ | |
157 | "R_386_GNU_VTINHERIT", /* name */ | |
0a1b45a2 | 158 | false, /* partial_inplace */ |
252b5132 RH |
159 | 0, /* src_mask */ |
160 | 0, /* dst_mask */ | |
0a1b45a2 | 161 | false), /* pcrel_offset */ |
252b5132 RH |
162 | |
163 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
164 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
165 | 0, /* rightshift */ | |
166 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
167 | 0, /* bitsize */ | |
0a1b45a2 | 168 | false, /* pc_relative */ |
252b5132 RH |
169 | 0, /* bitpos */ |
170 | complain_overflow_dont, /* complain_on_overflow */ | |
171 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
172 | "R_386_GNU_VTENTRY", /* name */ | |
0a1b45a2 | 173 | false, /* partial_inplace */ |
252b5132 RH |
174 | 0, /* src_mask */ |
175 | 0, /* dst_mask */ | |
1273b2f8 | 176 | false) /* pcrel_offset */ |
dc47f327 | 177 | |
55fd94b0 | 178 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
179 | |
180 | }; | |
181 | ||
252b5132 | 182 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
183 | #define TRACE(str) \ |
184 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
185 | #else |
186 | #define TRACE(str) | |
187 | #endif | |
188 | ||
189 | static reloc_howto_type * | |
f3185997 | 190 | elf_i386_reloc_type_lookup (bfd *abfd, |
55fd94b0 | 191 | bfd_reloc_code_real_type code) |
252b5132 RH |
192 | { |
193 | switch (code) | |
194 | { | |
195 | case BFD_RELOC_NONE: | |
196 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 197 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
198 | |
199 | case BFD_RELOC_32: | |
200 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 201 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
202 | |
203 | case BFD_RELOC_CTOR: | |
204 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 205 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
206 | |
207 | case BFD_RELOC_32_PCREL: | |
208 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 209 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
210 | |
211 | case BFD_RELOC_386_GOT32: | |
212 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 213 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
214 | |
215 | case BFD_RELOC_386_PLT32: | |
216 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 217 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
218 | |
219 | case BFD_RELOC_386_COPY: | |
220 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 221 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
222 | |
223 | case BFD_RELOC_386_GLOB_DAT: | |
224 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 225 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
226 | |
227 | case BFD_RELOC_386_JUMP_SLOT: | |
228 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 229 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
230 | |
231 | case BFD_RELOC_386_RELATIVE: | |
232 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 233 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
234 | |
235 | case BFD_RELOC_386_GOTOFF: | |
236 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 237 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
238 | |
239 | case BFD_RELOC_386_GOTPC: | |
240 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 241 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 242 | |
37e55690 JJ |
243 | /* These relocs are a GNU extension. */ |
244 | case BFD_RELOC_386_TLS_TPOFF: | |
245 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 246 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
247 | |
248 | case BFD_RELOC_386_TLS_IE: | |
249 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 250 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
251 | |
252 | case BFD_RELOC_386_TLS_GOTIE: | |
253 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 254 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 255 | |
13ae64f3 JJ |
256 | case BFD_RELOC_386_TLS_LE: |
257 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 258 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
259 | |
260 | case BFD_RELOC_386_TLS_GD: | |
261 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 262 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
263 | |
264 | case BFD_RELOC_386_TLS_LDM: | |
265 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 266 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 267 | |
252b5132 RH |
268 | case BFD_RELOC_16: |
269 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 270 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
271 | |
272 | case BFD_RELOC_16_PCREL: | |
273 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 274 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
275 | |
276 | case BFD_RELOC_8: | |
277 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 278 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
279 | |
280 | case BFD_RELOC_8_PCREL: | |
281 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 282 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 283 | |
13ae64f3 JJ |
284 | /* Common with Sun TLS implementation. */ |
285 | case BFD_RELOC_386_TLS_LDO_32: | |
286 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 287 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
288 | |
289 | case BFD_RELOC_386_TLS_IE_32: | |
290 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 291 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
292 | |
293 | case BFD_RELOC_386_TLS_LE_32: | |
294 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 295 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
296 | |
297 | case BFD_RELOC_386_TLS_DTPMOD32: | |
298 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 299 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
300 | |
301 | case BFD_RELOC_386_TLS_DTPOFF32: | |
302 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 303 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
304 | |
305 | case BFD_RELOC_386_TLS_TPOFF32: | |
306 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 307 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 308 | |
1788fc08 L |
309 | case BFD_RELOC_SIZE32: |
310 | TRACE ("BFD_RELOC_SIZE32"); | |
311 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
312 | ||
67a4f2b7 AO |
313 | case BFD_RELOC_386_TLS_GOTDESC: |
314 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
315 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
316 | ||
317 | case BFD_RELOC_386_TLS_DESC_CALL: | |
318 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
319 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
320 | ||
321 | case BFD_RELOC_386_TLS_DESC: | |
322 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
323 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
324 | ||
cbe950e9 L |
325 | case BFD_RELOC_386_IRELATIVE: |
326 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 327 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 328 | |
02a86693 L |
329 | case BFD_RELOC_386_GOT32X: |
330 | TRACE ("BFD_RELOC_386_GOT32X"); | |
331 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
332 | ||
252b5132 RH |
333 | case BFD_RELOC_VTABLE_INHERIT: |
334 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 335 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
336 | |
337 | case BFD_RELOC_VTABLE_ENTRY: | |
338 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 339 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
340 | |
341 | default: | |
f3185997 NC |
342 | TRACE ("Unknown"); |
343 | /* xgettext:c-format */ | |
e8f5af78 | 344 | _bfd_error_handler (_("%pB: unsupported relocation type: %#x"), |
f3185997 NC |
345 | abfd, (int) code); |
346 | bfd_set_error (bfd_error_bad_value); | |
347 | return NULL; | |
252b5132 | 348 | } |
252b5132 RH |
349 | } |
350 | ||
157090f7 AM |
351 | static reloc_howto_type * |
352 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
353 | const char *r_name) | |
354 | { | |
355 | unsigned int i; | |
356 | ||
357 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
358 | if (elf_howto_table[i].name != NULL | |
359 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
360 | return &elf_howto_table[i]; | |
361 | ||
362 | return NULL; | |
363 | } | |
364 | ||
142411ca | 365 | static reloc_howto_type * |
1273b2f8 | 366 | elf_i386_rtype_to_howto (unsigned r_type) |
252b5132 | 367 | { |
dc47f327 AM |
368 | unsigned int indx; |
369 | ||
370 | if ((indx = r_type) >= R_386_standard | |
371 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
372 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 373 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
374 | >= R_386_ext2 - R_386_ext) |
375 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
376 | >= R_386_vt - R_386_ext2)) | |
f3185997 | 377 | return NULL; |
06614111 NC |
378 | /* PR 17512: file: 0f67f69d. */ |
379 | if (elf_howto_table [indx].type != r_type) | |
380 | return NULL; | |
142411ca L |
381 | return &elf_howto_table[indx]; |
382 | } | |
383 | ||
0a1b45a2 | 384 | static bool |
f3185997 | 385 | elf_i386_info_to_howto_rel (bfd *abfd, |
142411ca L |
386 | arelent *cache_ptr, |
387 | Elf_Internal_Rela *dst) | |
388 | { | |
389 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
f3185997 | 390 | |
1273b2f8 | 391 | if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL) |
f3185997 NC |
392 | { |
393 | /* xgettext:c-format */ | |
394 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
395 | abfd, r_type); | |
396 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 397 | return false; |
f3185997 NC |
398 | } |
399 | ||
0a1b45a2 | 400 | return true; |
252b5132 RH |
401 | } |
402 | ||
403 | /* Return whether a symbol name implies a local label. The UnixWare | |
404 | 2.1 cc generates temporary symbols that start with .X, so we | |
405 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
406 | If so, we should move the .X recognition into | |
407 | _bfd_elf_is_local_label_name. */ | |
408 | ||
0a1b45a2 | 409 | static bool |
55fd94b0 | 410 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
411 | { |
412 | if (name[0] == '.' && name[1] == 'X') | |
0a1b45a2 | 413 | return true; |
252b5132 RH |
414 | |
415 | return _bfd_elf_is_local_label_name (abfd, name); | |
416 | } | |
417 | \f | |
38701953 | 418 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 419 | |
0a1b45a2 | 420 | static bool |
55fd94b0 | 421 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
422 | { |
423 | int offset; | |
eea6121a | 424 | size_t size; |
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) | |
0a1b45a2 | 431 | return false; |
61adc1a4 NC |
432 | |
433 | /* pr_cursig */ | |
228e534f | 434 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
435 | |
436 | /* pr_pid */ | |
228e534f | 437 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
438 | |
439 | /* pr_reg */ | |
440 | offset = 28; | |
eea6121a | 441 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
442 | } |
443 | else | |
444 | { | |
445 | switch (note->descsz) | |
446 | { | |
447 | default: | |
0a1b45a2 | 448 | return false; |
38701953 | 449 | |
61adc1a4 NC |
450 | case 144: /* Linux/i386 */ |
451 | /* pr_cursig */ | |
228e534f | 452 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 453 | |
61adc1a4 | 454 | /* pr_pid */ |
228e534f | 455 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 456 | |
61adc1a4 NC |
457 | /* pr_reg */ |
458 | offset = 72; | |
eea6121a | 459 | size = 68; |
38701953 | 460 | |
61adc1a4 NC |
461 | break; |
462 | } | |
38701953 AM |
463 | } |
464 | ||
465 | /* Make a ".reg/999" section. */ | |
466 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 467 | size, note->descpos + offset); |
38701953 AM |
468 | } |
469 | ||
0a1b45a2 | 470 | static bool |
55fd94b0 | 471 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 472 | { |
61adc1a4 | 473 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 474 | { |
61adc1a4 NC |
475 | int pr_version = bfd_get_32 (abfd, note->descdata); |
476 | ||
477 | if (pr_version != 1) | |
0a1b45a2 | 478 | return false; |
38701953 | 479 | |
228e534f | 480 | elf_tdata (abfd)->core->program |
61adc1a4 | 481 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 482 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
483 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
484 | } | |
485 | else | |
486 | { | |
487 | switch (note->descsz) | |
488 | { | |
489 | default: | |
0a1b45a2 | 490 | return false; |
61adc1a4 NC |
491 | |
492 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 493 | elf_tdata (abfd)->core->pid |
261b8d08 | 494 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 495 | elf_tdata (abfd)->core->program |
61adc1a4 | 496 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 497 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
498 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
499 | } | |
38701953 AM |
500 | } |
501 | ||
502 | /* Note that for some reason, a spurious space is tacked | |
503 | onto the end of the args in some (at least one anyway) | |
504 | implementations, so strip it off if it exists. */ | |
38701953 | 505 | { |
228e534f | 506 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
507 | int n = strlen (command); |
508 | ||
509 | if (0 < n && command[n - 1] == ' ') | |
510 | command[n - 1] = '\0'; | |
511 | } | |
512 | ||
0a1b45a2 | 513 | return true; |
38701953 AM |
514 | } |
515 | \f | |
516 | /* Functions for the i386 ELF linker. | |
517 | ||
518 | In order to gain some understanding of code in this file without | |
519 | knowing all the intricate details of the linker, note the | |
520 | following: | |
521 | ||
522 | Functions named elf_i386_* are called by external routines, other | |
523 | functions are only called locally. elf_i386_* functions appear | |
524 | in this file more or less in the order in which they are called | |
525 | from external routines. eg. elf_i386_check_relocs is called | |
526 | early in the link process, elf_i386_finish_dynamic_sections is | |
527 | one of the last functions. */ | |
528 | ||
f604c2a2 | 529 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 530 | |
f604c2a2 | 531 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 532 | |
f604c2a2 L |
533 | /* The size in bytes of an entry in the non-lazy procedure linkage |
534 | table. */ | |
252b5132 | 535 | |
f604c2a2 L |
536 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
537 | ||
538 | /* The first entry in an absolute lazy procedure linkage table looks | |
539 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
540 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
541 | ||
542 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
543 | { |
544 | 0xff, 0x35, /* pushl contents of address */ | |
545 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
546 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 547 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
548 | }; |
549 | ||
f604c2a2 L |
550 | /* Subsequent entries in an absolute lazy procedure linkage table look |
551 | like this. */ | |
252b5132 | 552 | |
f604c2a2 | 553 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
554 | { |
555 | 0xff, 0x25, /* jmp indirect */ | |
556 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
557 | 0x68, /* pushl immediate */ | |
558 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
559 | 0xe9, /* jmp relative */ | |
560 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
561 | }; | |
562 | ||
f604c2a2 L |
563 | /* The first entry in a PIC lazy procedure linkage table look like |
564 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
565 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 566 | |
f604c2a2 | 567 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
568 | { |
569 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 570 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
571 | }; |
572 | ||
f604c2a2 L |
573 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
574 | this. */ | |
252b5132 | 575 | |
f604c2a2 | 576 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
577 | { |
578 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
579 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
580 | 0x68, /* pushl immediate */ | |
581 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
582 | 0xe9, /* jmp relative */ | |
583 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
584 | }; | |
585 | ||
f604c2a2 | 586 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 587 | |
f604c2a2 | 588 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
589 | { |
590 | 0xff, 0x25, /* jmp indirect */ | |
591 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
592 | 0x66, 0x90 /* xchg %ax,%ax */ | |
593 | }; | |
594 | ||
f604c2a2 L |
595 | /* Entries in the PIC non-lazy procedure linkage table look like |
596 | this. */ | |
dd7e64d4 | 597 | |
f604c2a2 | 598 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
599 | { |
600 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
601 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
602 | 0x66, 0x90 /* xchg %ax,%ax */ | |
603 | }; | |
604 | ||
ee2fdd6f L |
605 | /* The first entry in an absolute IBT-enabled lazy procedure linkage |
606 | table looks like this. */ | |
607 | ||
608 | static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
609 | { | |
07d6d2b8 AM |
610 | 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */ |
611 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */ | |
612 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
613 | }; |
614 | ||
615 | /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage | |
616 | table look like this. Subsequent entries for a PIC IBT-enabled lazy | |
617 | procedure linkage table are the same. */ | |
618 | ||
619 | static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
620 | { | |
07d6d2b8 AM |
621 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
622 | 0x68, 0, 0, 0, 0, /* pushl immediate */ | |
623 | 0xe9, 0, 0, 0, 0, /* jmp relative */ | |
624 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
625 | }; |
626 | ||
627 | /* The first entry in a PIC IBT-enabled lazy procedure linkage table | |
628 | look like. */ | |
629 | ||
630 | static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
631 | { | |
632 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
07d6d2b8 AM |
633 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ |
634 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
635 | }; |
636 | ||
637 | /* Entries for branches with IBT-enabled in the absolute non-lazey | |
638 | procedure linkage table look like this. They have the same size | |
639 | as the lazy PLT entry. */ | |
640 | ||
641 | static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
642 | { | |
07d6d2b8 | 643 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
644 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */ |
645 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
646 | }; | |
647 | ||
648 | /* Entries for branches with IBT-enabled in the PIC non-lazey procedure | |
649 | linkage table look like this. They have the same size as the lazy | |
650 | PLT entry. */ | |
651 | ||
652 | static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
653 | { | |
07d6d2b8 | 654 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
655 | 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */ |
656 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
657 | }; | |
658 | ||
f604c2a2 | 659 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 660 | |
f604c2a2 | 661 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 | 662 | { |
e41b3a13 JJ |
663 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
664 | 0, 0, 0, 0, /* CIE ID */ | |
665 | 1, /* CIE version */ | |
666 | 'z', 'R', 0, /* Augmentation string */ | |
667 | 1, /* Code alignment factor */ | |
668 | 0x7c, /* Data alignment factor */ | |
669 | 8, /* Return address column */ | |
670 | 1, /* Augmentation size */ | |
671 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
672 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
673 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
674 | DW_CFA_nop, DW_CFA_nop, | |
675 | ||
676 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
677 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
678 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
679 | 0, 0, 0, 0, /* .plt size goes here */ | |
680 | 0, /* Augmentation size */ | |
681 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
682 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
683 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
684 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
685 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
686 | 11, /* Block length */ | |
687 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
688 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
689 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 690 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
691 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
692 | }; | |
693 | ||
ee2fdd6f L |
694 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
695 | ||
696 | static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] = | |
697 | { | |
698 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
699 | 0, 0, 0, 0, /* CIE ID */ | |
700 | 1, /* CIE version */ | |
701 | 'z', 'R', 0, /* Augmentation string */ | |
702 | 1, /* Code alignment factor */ | |
703 | 0x7c, /* Data alignment factor */ | |
704 | 8, /* Return address column */ | |
705 | 1, /* Augmentation size */ | |
706 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
707 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
708 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
709 | DW_CFA_nop, DW_CFA_nop, | |
710 | ||
711 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
712 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
713 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
714 | 0, 0, 0, 0, /* .plt size goes here */ | |
715 | 0, /* Augmentation size */ | |
716 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
717 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
718 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
719 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
720 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
721 | 11, /* Block length */ | |
722 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
723 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
724 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
725 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
726 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
727 | }; | |
728 | ||
f604c2a2 | 729 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 730 | |
f604c2a2 | 731 | static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] = |
fff53dae L |
732 | { |
733 | #define PLT_GOT_FDE_LENGTH 16 | |
734 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
735 | 0, 0, 0, 0, /* CIE ID */ | |
736 | 1, /* CIE version */ | |
737 | 'z', 'R', 0, /* Augmentation string */ | |
738 | 1, /* Code alignment factor */ | |
739 | 0x7c, /* Data alignment factor */ | |
740 | 8, /* Return address column */ | |
741 | 1, /* Augmentation size */ | |
742 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
743 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
744 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
745 | DW_CFA_nop, DW_CFA_nop, | |
746 | ||
747 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
748 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
f604c2a2 L |
749 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
750 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
751 | 0, /* Augmentation size */ |
752 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
753 | }; | |
754 | ||
25e762b9 | 755 | /* These are the standard parameters. */ |
765e526c | 756 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt = |
25e762b9 | 757 | { |
07d6d2b8 AM |
758 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
759 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
760 | elf_i386_lazy_plt_entry, /* plt_entry */ | |
761 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
762 | NULL, /* plt_tlsdesc_entry */ |
763 | 0, /* plt_tlsdesc_entry_size*/ | |
764 | 0, /* plt_tlsdesc_got1_offset */ | |
765 | 0, /* plt_tlsdesc_got2_offset */ | |
766 | 0, /* plt_tlsdesc_got1_insn_end */ | |
767 | 0, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
768 | 2, /* plt0_got1_offset */ |
769 | 8, /* plt0_got2_offset */ | |
770 | 0, /* plt0_got2_insn_end */ | |
771 | 2, /* plt_got_offset */ | |
772 | 7, /* plt_reloc_offset */ | |
773 | 12, /* plt_plt_offset */ | |
774 | 0, /* plt_got_insn_size */ | |
775 | 0, /* plt_plt_insn_end */ | |
776 | 6, /* plt_lazy_offset */ | |
777 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ | |
778 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
779 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 L |
780 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
781 | }; | |
782 | ||
765e526c | 783 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt = |
f604c2a2 | 784 | { |
07d6d2b8 AM |
785 | elf_i386_non_lazy_plt_entry, /* plt_entry */ |
786 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
787 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
788 | 2, /* plt_got_offset */ | |
789 | 0, /* plt_got_insn_size */ | |
790 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 | 791 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
25e762b9 | 792 | }; |
ee2fdd6f | 793 | |
765e526c | 794 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt = |
ee2fdd6f | 795 | { |
07d6d2b8 | 796 | elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */ |
ee2fdd6f | 797 | sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */ |
07d6d2b8 AM |
798 | elf_i386_lazy_ibt_plt_entry, /* plt_entry */ |
799 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
800 | NULL, /* plt_tlsdesc_entry */ |
801 | 0, /* plt_tlsdesc_entry_size*/ | |
802 | 0, /* plt_tlsdesc_got1_offset */ | |
803 | 0, /* plt_tlsdesc_got2_offset */ | |
804 | 0, /* plt_tlsdesc_got1_insn_end */ | |
805 | 0, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
806 | 2, /* plt0_got1_offset */ |
807 | 8, /* plt0_got2_offset */ | |
808 | 0, /* plt0_got2_insn_end */ | |
809 | 4+2, /* plt_got_offset */ | |
810 | 4+1, /* plt_reloc_offset */ | |
811 | 4+6, /* plt_plt_offset */ | |
812 | 0, /* plt_got_insn_size */ | |
813 | 0, /* plt_plt_insn_end */ | |
814 | 0, /* plt_lazy_offset */ | |
815 | elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */ | |
816 | elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
817 | elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
818 | sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
819 | }; | |
820 | ||
765e526c | 821 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt = |
ee2fdd6f | 822 | { |
07d6d2b8 | 823 | elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */ |
ee2fdd6f | 824 | elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */ |
07d6d2b8 AM |
825 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
826 | 4+2, /* plt_got_offset */ | |
827 | 0, /* plt_got_insn_size */ | |
828 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
829 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
830 | }; | |
25e762b9 RM |
831 | \f |
832 | ||
eac338cf PB |
833 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
834 | for the PLTResolve stub and then for each PLT entry. */ | |
835 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
836 | #define PLTRESOLVE_RELOCS 2 | |
837 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
838 | ||
142411ca L |
839 | /* Return TRUE if the TLS access code sequence support transition |
840 | from R_TYPE. */ | |
841 | ||
0a1b45a2 | 842 | static bool |
bedfd056 | 843 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
844 | bfd_byte *contents, |
845 | Elf_Internal_Shdr *symtab_hdr, | |
846 | struct elf_link_hash_entry **sym_hashes, | |
847 | unsigned int r_type, | |
848 | const Elf_Internal_Rela *rel, | |
849 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 850 | { |
6eaa7fb5 | 851 | unsigned int val, type, reg; |
142411ca L |
852 | unsigned long r_symndx; |
853 | struct elf_link_hash_entry *h; | |
854 | bfd_vma offset; | |
6eaa7fb5 | 855 | bfd_byte *call; |
0a1b45a2 | 856 | bool indirect_call; |
142411ca | 857 | |
142411ca | 858 | offset = rel->r_offset; |
13ae64f3 | 859 | switch (r_type) |
142411ca L |
860 | { |
861 | case R_386_TLS_GD: | |
862 | case R_386_TLS_LDM: | |
863 | if (offset < 2 || (rel + 1) >= relend) | |
0a1b45a2 | 864 | return false; |
142411ca | 865 | |
0a1b45a2 | 866 | indirect_call = false; |
6eaa7fb5 L |
867 | call = contents + offset + 4; |
868 | val = *(call - 5); | |
869 | type = *(call - 6); | |
142411ca L |
870 | if (r_type == R_386_TLS_GD) |
871 | { | |
09e8c3bf | 872 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
873 | leal foo@tlsgd(,%ebx,1), %eax |
874 | call ___tls_get_addr@PLT | |
875 | or | |
876 | leal foo@tlsgd(%ebx) %eax | |
877 | call ___tls_get_addr@PLT | |
878 | nop | |
879 | or | |
880 | leal foo@tlsgd(%reg), %eax | |
881 | call *___tls_get_addr@GOT(%reg) | |
882 | which may be converted to | |
883 | addr32 call ___tls_get_addr | |
142411ca | 884 | can transit to different access model. */ |
6eaa7fb5 L |
885 | if ((offset + 10) > sec->size |
886 | || (type != 0x8d && type != 0x04)) | |
0a1b45a2 | 887 | return false; |
142411ca | 888 | |
142411ca L |
889 | if (type == 0x04) |
890 | { | |
6eaa7fb5 L |
891 | /* leal foo@tlsgd(,%ebx,1), %eax |
892 | call ___tls_get_addr@PLT */ | |
142411ca | 893 | if (offset < 3) |
0a1b45a2 | 894 | return false; |
142411ca | 895 | |
6eaa7fb5 L |
896 | if (*(call - 7) != 0x8d |
897 | || val != 0x1d | |
898 | || call[0] != 0xe8) | |
0a1b45a2 | 899 | return false; |
142411ca L |
900 | } |
901 | else | |
902 | { | |
6eaa7fb5 L |
903 | /* This must be |
904 | leal foo@tlsgd(%ebx), %eax | |
905 | call ___tls_get_addr@PLT | |
906 | nop | |
907 | or | |
908 | leal foo@tlsgd(%reg), %eax | |
909 | call *___tls_get_addr@GOT(%reg) | |
910 | which may be converted to | |
911 | addr32 call ___tls_get_addr | |
912 | ||
913 | %eax can't be used as the GOT base register since it | |
914 | is used to pass parameter to ___tls_get_addr. */ | |
915 | reg = val & 7; | |
916 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
0a1b45a2 | 917 | return false; |
142411ca | 918 | |
6eaa7fb5 L |
919 | indirect_call = call[0] == 0xff; |
920 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
921 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
922 | && !(indirect_call | |
923 | && (call[1] & 0xf8) == 0x90 | |
924 | && (call[1] & 0x7) == reg)) | |
0a1b45a2 | 925 | return false; |
142411ca L |
926 | } |
927 | } | |
928 | else | |
929 | { | |
930 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
931 | leal foo@tlsldm(%ebx), %eax |
932 | call ___tls_get_addr@PLT | |
933 | or | |
934 | leal foo@tlsldm(%reg), %eax | |
935 | call *___tls_get_addr@GOT(%reg) | |
936 | which may be converted to | |
937 | addr32 call ___tls_get_addr | |
142411ca L |
938 | can transit to different access model. */ |
939 | if (type != 0x8d || (offset + 9) > sec->size) | |
0a1b45a2 | 940 | return false; |
142411ca | 941 | |
6eaa7fb5 L |
942 | /* %eax can't be used as the GOT base register since it is |
943 | used to pass parameter to ___tls_get_addr. */ | |
944 | reg = val & 7; | |
945 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
0a1b45a2 | 946 | return false; |
142411ca | 947 | |
6eaa7fb5 L |
948 | indirect_call = call[0] == 0xff; |
949 | if (!(reg == 3 && call[0] == 0xe8) | |
950 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
951 | && !(indirect_call | |
952 | && (call[1] & 0xf8) == 0x90 | |
953 | && (call[1] & 0x7) == reg)) | |
0a1b45a2 | 954 | return false; |
6eaa7fb5 | 955 | } |
142411ca L |
956 | |
957 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
958 | if (r_symndx < symtab_hdr->sh_info) | |
0a1b45a2 | 959 | return false; |
142411ca L |
960 | |
961 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 962 | if (h == NULL |
0afcef53 | 963 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
0a1b45a2 | 964 | return false; |
6eaa7fb5 L |
965 | else if (indirect_call) |
966 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
967 | else | |
968 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
969 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
970 | |
971 | case R_386_TLS_IE: | |
972 | /* Check transition from IE access model: | |
973 | movl foo@indntpoff(%rip), %eax | |
974 | movl foo@indntpoff(%rip), %reg | |
975 | addl foo@indntpoff(%rip), %reg | |
976 | */ | |
977 | ||
978 | if (offset < 1 || (offset + 4) > sec->size) | |
0a1b45a2 | 979 | return false; |
142411ca L |
980 | |
981 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
982 | val = bfd_get_8 (abfd, contents + offset - 1); | |
983 | if (val == 0xa1) | |
0a1b45a2 | 984 | return true; |
142411ca L |
985 | |
986 | if (offset < 2) | |
0a1b45a2 | 987 | return false; |
142411ca L |
988 | |
989 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
990 | type = bfd_get_8 (abfd, contents + offset - 2); | |
991 | return ((type == 0x8b || type == 0x03) | |
992 | && (val & 0xc7) == 0x05); | |
993 | ||
994 | case R_386_TLS_GOTIE: | |
995 | case R_386_TLS_IE_32: | |
996 | /* Check transition from {IE_32,GOTIE} access model: | |
997 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
998 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
999 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1000 | */ | |
1001 | ||
1002 | if (offset < 2 || (offset + 4) > sec->size) | |
0a1b45a2 | 1003 | return false; |
142411ca L |
1004 | |
1005 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1006 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
0a1b45a2 | 1007 | return false; |
142411ca L |
1008 | |
1009 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1010 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1011 | ||
1012 | case R_386_TLS_GOTDESC: | |
1013 | /* Check transition from GDesc access model: | |
1014 | leal x@tlsdesc(%ebx), %eax | |
1015 | ||
1016 | Make sure it's a leal adding ebx to a 32-bit offset | |
1017 | into any register, although it's probably almost always | |
1018 | going to be eax. */ | |
1019 | ||
1020 | if (offset < 2 || (offset + 4) > sec->size) | |
0a1b45a2 | 1021 | return false; |
142411ca L |
1022 | |
1023 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
0a1b45a2 | 1024 | return false; |
142411ca L |
1025 | |
1026 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1027 | return (val & 0xc7) == 0x83; | |
1028 | ||
1029 | case R_386_TLS_DESC_CALL: | |
1030 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1031 | call *x@tlsdesc(%eax) |
142411ca L |
1032 | */ |
1033 | if (offset + 2 <= sec->size) | |
1034 | { | |
6eaa7fb5 L |
1035 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1036 | call = contents + offset; | |
1037 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1038 | } |
1039 | ||
0a1b45a2 | 1040 | return false; |
142411ca L |
1041 | |
1042 | default: | |
1043 | abort (); | |
1044 | } | |
1045 | } | |
1046 | ||
1047 | /* Return TRUE if the TLS access transition is OK or no transition | |
1048 | will be performed. Update R_TYPE if there is a transition. */ | |
1049 | ||
0a1b45a2 | 1050 | static bool |
142411ca L |
1051 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1052 | asection *sec, bfd_byte *contents, | |
1053 | Elf_Internal_Shdr *symtab_hdr, | |
1054 | struct elf_link_hash_entry **sym_hashes, | |
1055 | unsigned int *r_type, int tls_type, | |
1056 | const Elf_Internal_Rela *rel, | |
1057 | const Elf_Internal_Rela *relend, | |
4c544807 | 1058 | struct elf_link_hash_entry *h, |
bedfd056 | 1059 | unsigned long r_symndx, |
0a1b45a2 | 1060 | bool from_relocate_section) |
142411ca L |
1061 | { |
1062 | unsigned int from_type = *r_type; | |
1063 | unsigned int to_type = from_type; | |
0a1b45a2 | 1064 | bool check = true; |
142411ca | 1065 | |
bb1cb422 L |
1066 | /* Skip TLS transition for functions. */ |
1067 | if (h != NULL | |
1068 | && (h->type == STT_FUNC | |
1069 | || h->type == STT_GNU_IFUNC)) | |
0a1b45a2 | 1070 | return true; |
bb1cb422 | 1071 | |
142411ca | 1072 | switch (from_type) |
13ae64f3 JJ |
1073 | { |
1074 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1075 | case R_386_TLS_GOTDESC: |
1076 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1077 | case R_386_TLS_IE_32: |
37e55690 JJ |
1078 | case R_386_TLS_IE: |
1079 | case R_386_TLS_GOTIE: | |
0e1862bb | 1080 | if (bfd_link_executable (info)) |
142411ca L |
1081 | { |
1082 | if (h == NULL) | |
1083 | to_type = R_386_TLS_LE_32; | |
1084 | else if (from_type != R_386_TLS_IE | |
1085 | && from_type != R_386_TLS_GOTIE) | |
1086 | to_type = R_386_TLS_IE_32; | |
1087 | } | |
1088 | ||
bedfd056 L |
1089 | /* When we are called from elf_i386_relocate_section, there may |
1090 | be additional transitions based on TLS_TYPE. */ | |
1091 | if (from_relocate_section) | |
142411ca L |
1092 | { |
1093 | unsigned int new_to_type = to_type; | |
1094 | ||
51537393 | 1095 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1096 | new_to_type = R_386_TLS_LE_32; |
1097 | ||
1098 | if (to_type == R_386_TLS_GD | |
1099 | || to_type == R_386_TLS_GOTDESC | |
1100 | || to_type == R_386_TLS_DESC_CALL) | |
1101 | { | |
1102 | if (tls_type == GOT_TLS_IE_POS) | |
1103 | new_to_type = R_386_TLS_GOTIE; | |
1104 | else if (tls_type & GOT_TLS_IE) | |
1105 | new_to_type = R_386_TLS_IE_32; | |
1106 | } | |
1107 | ||
1108 | /* We checked the transition before when we were called from | |
1109 | elf_i386_check_relocs. We only want to check the new | |
1110 | transition which hasn't been checked before. */ | |
1111 | check = new_to_type != to_type && from_type == to_type; | |
1112 | to_type = new_to_type; | |
1113 | } | |
1114 | ||
1115 | break; | |
1116 | ||
13ae64f3 | 1117 | case R_386_TLS_LDM: |
0e1862bb | 1118 | if (bfd_link_executable (info)) |
142411ca L |
1119 | to_type = R_386_TLS_LE_32; |
1120 | break; | |
1121 | ||
1122 | default: | |
0a1b45a2 | 1123 | return true; |
142411ca L |
1124 | } |
1125 | ||
1126 | /* Return TRUE if there is no transition. */ | |
1127 | if (from_type == to_type) | |
0a1b45a2 | 1128 | return true; |
142411ca L |
1129 | |
1130 | /* Check if the transition can be performed. */ | |
1131 | if (check | |
bedfd056 | 1132 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1133 | symtab_hdr, sym_hashes, |
1134 | from_type, rel, relend)) | |
1135 | { | |
2f629d23 | 1136 | reloc_howto_type *from, *to; |
4c544807 | 1137 | const char *name; |
142411ca | 1138 | |
1273b2f8 L |
1139 | from = elf_i386_rtype_to_howto (from_type); |
1140 | to = elf_i386_rtype_to_howto (to_type); | |
142411ca | 1141 | |
4c544807 L |
1142 | if (h) |
1143 | name = h->root.root.string; | |
1144 | else | |
1145 | { | |
0afcef53 | 1146 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1147 | |
0afcef53 | 1148 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1149 | if (htab == NULL) |
1150 | name = "*unknown*"; | |
1151 | else | |
1152 | { | |
1153 | Elf_Internal_Sym *isym; | |
1154 | ||
f1dfbfdb | 1155 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
4dfe6ac6 NC |
1156 | abfd, r_symndx); |
1157 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1158 | } | |
4c544807 L |
1159 | } |
1160 | ||
4eca0228 | 1161 | _bfd_error_handler |
695344c0 | 1162 | /* xgettext:c-format */ |
2dcf00ce AM |
1163 | (_("%pB: TLS transition from %s to %s against `%s'" |
1164 | " at %#" PRIx64 " in section `%pA' failed"), | |
c08bb8dd | 1165 | abfd, from->name, to->name, name, |
2dcf00ce | 1166 | (uint64_t) rel->r_offset, sec); |
142411ca | 1167 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 1168 | return false; |
13ae64f3 JJ |
1169 | } |
1170 | ||
142411ca | 1171 | *r_type = to_type; |
0a1b45a2 | 1172 | return true; |
13ae64f3 JJ |
1173 | } |
1174 | ||
c175a657 L |
1175 | /* With the local symbol, foo, we convert |
1176 | mov foo@GOT[(%reg1)], %reg2 | |
1177 | to | |
1178 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1179 | and convert | |
1180 | call/jmp *foo@GOT[(%reg)] | |
1181 | to | |
1182 | nop call foo/jmp foo nop | |
1183 | When PIC is false, convert | |
1184 | test %reg1, foo@GOT[(%reg2)] | |
1185 | to | |
1186 | test $foo, %reg1 | |
1187 | and convert | |
1188 | binop foo@GOT[(%reg1)], %reg2 | |
1189 | to | |
1190 | binop $foo, %reg2 | |
1191 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1192 | instructions. */ | |
1193 | ||
1194 | static | |
0a1b45a2 | 1195 | bool |
c175a657 L |
1196 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, |
1197 | bfd_byte *contents, | |
6999821f | 1198 | unsigned int *r_type_p, |
c175a657 L |
1199 | Elf_Internal_Rela *irel, |
1200 | struct elf_link_hash_entry *h, | |
0a1b45a2 | 1201 | bool *converted, |
c175a657 L |
1202 | struct bfd_link_info *link_info) |
1203 | { | |
0afcef53 | 1204 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1205 | unsigned int opcode; |
1206 | unsigned int modrm; | |
0a1b45a2 | 1207 | bool baseless; |
c175a657 L |
1208 | Elf_Internal_Sym *isym; |
1209 | unsigned int addend; | |
1210 | unsigned int nop; | |
1211 | bfd_vma nop_offset; | |
0a1b45a2 AM |
1212 | bool is_pic; |
1213 | bool to_reloc_32; | |
1214 | bool abs_symbol; | |
c175a657 L |
1215 | unsigned int r_type; |
1216 | unsigned int r_symndx; | |
1217 | bfd_vma roff = irel->r_offset; | |
0a1b45a2 | 1218 | bool local_ref; |
0a27fed7 | 1219 | struct elf_x86_link_hash_entry *eh; |
c175a657 L |
1220 | |
1221 | if (roff < 2) | |
0a1b45a2 | 1222 | return true; |
c175a657 | 1223 | |
7d4d9709 | 1224 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1225 | addend = bfd_get_32 (abfd, contents + roff); |
1226 | if (addend != 0) | |
0a1b45a2 | 1227 | return true; |
c175a657 | 1228 | |
0afcef53 | 1229 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
c175a657 L |
1230 | is_pic = bfd_link_pic (link_info); |
1231 | ||
6999821f | 1232 | r_type = *r_type_p; |
c175a657 L |
1233 | r_symndx = ELF32_R_SYM (irel->r_info); |
1234 | ||
1235 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1236 | baseless = (modrm & 0xc7) == 0x5; | |
1237 | ||
382aae06 L |
1238 | if (h) |
1239 | { | |
1240 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1241 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
1242 | isym = NULL; | |
1243 | abs_symbol = ABS_SYMBOL_P (h); | |
1244 | } | |
1245 | else | |
1246 | { | |
0a1b45a2 | 1247 | local_ref = true; |
f1dfbfdb | 1248 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, abfd, |
382aae06 L |
1249 | r_symndx); |
1250 | abs_symbol = isym->st_shndx == SHN_ABS; | |
1251 | } | |
1252 | ||
7d4d9709 | 1253 | if (baseless && is_pic) |
c175a657 L |
1254 | { |
1255 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1256 | since we don't know what the GOT base is. */ |
c175a657 L |
1257 | const char *name; |
1258 | ||
1259 | if (h == NULL) | |
382aae06 | 1260 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); |
c175a657 L |
1261 | else |
1262 | name = h->root.root.string; | |
1263 | ||
4eca0228 | 1264 | _bfd_error_handler |
695344c0 | 1265 | /* xgettext:c-format */ |
871b3ab2 | 1266 | (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base" |
63a5468a | 1267 | " register can not be used when making a shared object"), |
c175a657 | 1268 | abfd, name); |
0a1b45a2 | 1269 | return false; |
c175a657 L |
1270 | } |
1271 | ||
1272 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1273 | ||
c175a657 L |
1274 | /* Convert to R_386_32 if PIC is false or there is no base |
1275 | register. */ | |
1276 | to_reloc_32 = !is_pic || baseless; | |
1277 | ||
0a27fed7 L |
1278 | eh = elf_x86_hash_entry (h); |
1279 | ||
7d4d9709 L |
1280 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1281 | reloc. */ | |
c175a657 L |
1282 | if (h == NULL) |
1283 | { | |
1284 | if (opcode == 0x0ff) | |
1285 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1286 | goto convert_branch; | |
1287 | else | |
1288 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1289 | "test %reg1, foo@GOT(%reg2)" and | |
1290 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1291 | goto convert_load; | |
1292 | } | |
1293 | ||
1294 | /* Undefined weak symbol is only bound locally in executable | |
1295 | and its reference is resolved as 0. */ | |
0a27fed7 L |
1296 | if (h->root.type == bfd_link_hash_undefweak |
1297 | && !eh->linker_def | |
1298 | && local_ref) | |
c175a657 L |
1299 | { |
1300 | if (opcode == 0xff) | |
1301 | { | |
1302 | /* No direct branch to 0 for PIC. */ | |
1303 | if (is_pic) | |
0a1b45a2 | 1304 | return true; |
c175a657 L |
1305 | else |
1306 | goto convert_branch; | |
1307 | } | |
1308 | else | |
1309 | { | |
1310 | /* We can convert load of address 0 to R_386_32. */ | |
0a1b45a2 | 1311 | to_reloc_32 = true; |
c175a657 L |
1312 | goto convert_load; |
1313 | } | |
1314 | } | |
1315 | ||
1316 | if (opcode == 0xff) | |
1317 | { | |
1318 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1319 | if ((h->root.type == bfd_link_hash_defined | |
1320 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1321 | && local_ref) |
c175a657 L |
1322 | { |
1323 | /* The function is locally defined. */ | |
dc1e8a47 | 1324 | convert_branch: |
c175a657 L |
1325 | /* Convert R_386_GOT32X to R_386_PC32. */ |
1326 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1327 | { | |
1328 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
1329 | is a nop prefix. */ | |
1330 | modrm = 0xe8; | |
6eaa7fb5 L |
1331 | /* To support TLS optimization, always use addr32 prefix |
1332 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1d4af308 | 1333 | if (eh && eh->tls_get_addr) |
c175a657 | 1334 | { |
6eaa7fb5 L |
1335 | nop = 0x67; |
1336 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1337 | } |
1338 | else | |
6eaa7fb5 | 1339 | { |
5b9c07b2 L |
1340 | nop = htab->params->call_nop_byte; |
1341 | if (htab->params->call_nop_as_suffix) | |
6eaa7fb5 L |
1342 | { |
1343 | nop_offset = roff + 3; | |
1344 | irel->r_offset -= 1; | |
1345 | } | |
1346 | else | |
1347 | nop_offset = roff - 2; | |
1348 | } | |
c175a657 L |
1349 | } |
1350 | else | |
1351 | { | |
1352 | /* Convert to "jmp foo nop". */ | |
1353 | modrm = 0xe9; | |
1354 | nop = NOP_OPCODE; | |
1355 | nop_offset = roff + 3; | |
1356 | irel->r_offset -= 1; | |
1357 | } | |
1358 | ||
1359 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1360 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1361 | /* When converting to PC-relative relocation, we | |
1362 | need to adjust addend by -4. */ | |
1363 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1364 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
6999821f | 1365 | *r_type_p = R_386_PC32; |
0a1b45a2 | 1366 | *converted = true; |
c175a657 L |
1367 | } |
1368 | } | |
1369 | else | |
1370 | { | |
1371 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1372 | "test %reg1, foo@GOT(%reg2)" and | |
1373 | "binop foo@GOT[(%reg1)], %reg2". | |
1374 | ||
1375 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1376 | link-time address. */ | |
1377 | if (h == htab->elf.hdynamic) | |
0a1b45a2 | 1378 | return true; |
c175a657 L |
1379 | |
1380 | /* def_regular is set by an assignment in a linker script in | |
cbd0eecf L |
1381 | bfd_elf_record_link_assignment. start_stop is set on |
1382 | __start_SECNAME/__stop_SECNAME which mark section SECNAME. */ | |
1383 | if (h->start_stop | |
0a27fed7 | 1384 | || eh->linker_def |
cbd0eecf L |
1385 | || ((h->def_regular |
1386 | || h->root.type == bfd_link_hash_defined | |
1387 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1388 | && local_ref)) |
c175a657 | 1389 | { |
794f2bba L |
1390 | /* Skip __start_SECNAME/__stop_SECNAME when --gc-sections |
1391 | -z start-stop-gc are used. */ | |
1392 | if (elf_x86_start_stop_gc_p (link_info, h)) | |
1393 | return true; | |
1394 | ||
dc1e8a47 | 1395 | convert_load: |
c175a657 L |
1396 | if (opcode == 0x8b) |
1397 | { | |
382aae06 | 1398 | if (abs_symbol && local_ref) |
0a1b45a2 | 1399 | to_reloc_32 = true; |
382aae06 | 1400 | |
c175a657 L |
1401 | if (to_reloc_32) |
1402 | { | |
1403 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1404 | "mov $foo, %reg2" with R_386_32. */ | |
1405 | r_type = R_386_32; | |
1406 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1407 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1408 | opcode = 0xc7; | |
1409 | } | |
1410 | else | |
1411 | { | |
1412 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1413 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1414 | r_type = R_386_GOTOFF; | |
1415 | opcode = 0x8d; | |
1416 | } | |
1417 | } | |
1418 | else | |
1419 | { | |
1420 | /* Only R_386_32 is supported. */ | |
1421 | if (!to_reloc_32) | |
0a1b45a2 | 1422 | return true; |
c175a657 L |
1423 | |
1424 | if (opcode == 0x85) | |
1425 | { | |
1426 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1427 | "test $foo, %reg1". */ | |
1428 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1429 | opcode = 0xf7; | |
1430 | } | |
1431 | else | |
1432 | { | |
1433 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1434 | "binop $foo, %reg2". */ | |
1435 | modrm = (0xc0 | |
1436 | | (modrm & 0x38) >> 3 | |
1437 | | (opcode & 0x3c)); | |
1438 | opcode = 0x81; | |
1439 | } | |
1440 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1441 | r_type = R_386_32; | |
1442 | } | |
1443 | ||
1444 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1445 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
6999821f | 1446 | *r_type_p = r_type; |
0a1b45a2 | 1447 | *converted = true; |
c175a657 L |
1448 | } |
1449 | } | |
1450 | ||
0a1b45a2 | 1451 | return true; |
c175a657 L |
1452 | } |
1453 | ||
252b5132 | 1454 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1455 | calculate needed space in the global offset table, procedure linkage |
1456 | table, and dynamic reloc sections. */ | |
252b5132 | 1457 | |
0a1b45a2 | 1458 | static bool |
55fd94b0 AM |
1459 | elf_i386_check_relocs (bfd *abfd, |
1460 | struct bfd_link_info *info, | |
1461 | asection *sec, | |
1462 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1463 | { |
0afcef53 | 1464 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1465 | Elf_Internal_Shdr *symtab_hdr; |
1466 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1467 | const Elf_Internal_Rela *rel; |
1468 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1469 | asection *sreloc; |
bedfd056 | 1470 | bfd_byte *contents; |
0a1b45a2 | 1471 | bool converted; |
252b5132 | 1472 | |
0e1862bb | 1473 | if (bfd_link_relocatable (info)) |
0a1b45a2 | 1474 | return true; |
252b5132 | 1475 | |
0afcef53 | 1476 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 1477 | if (htab == NULL) |
c337a162 L |
1478 | { |
1479 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1480 | return false; |
c337a162 | 1481 | } |
4dfe6ac6 | 1482 | |
fe53b4a4 L |
1483 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1484 | ||
bedfd056 L |
1485 | /* Get the section contents. */ |
1486 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1487 | contents = elf_section_data (sec)->this_hdr.contents; | |
1488 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1489 | { | |
1490 | sec->check_relocs_failed = 1; | |
0a1b45a2 | 1491 | return false; |
bedfd056 L |
1492 | } |
1493 | ||
0ffa91dd | 1494 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1495 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1496 | |
0a1b45a2 | 1497 | converted = false; |
5e5e02ae | 1498 | |
252b5132 RH |
1499 | sreloc = NULL; |
1500 | ||
1501 | rel_end = relocs + sec->reloc_count; | |
1502 | for (rel = relocs; rel < rel_end; rel++) | |
1503 | { | |
13ae64f3 | 1504 | unsigned int r_type; |
d42c267e | 1505 | unsigned int r_symndx; |
252b5132 | 1506 | struct elf_link_hash_entry *h; |
0afcef53 | 1507 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1508 | Elf_Internal_Sym *isym; |
1509 | const char *name; | |
0a1b45a2 AM |
1510 | bool size_reloc; |
1511 | bool no_dynreloc; | |
252b5132 RH |
1512 | |
1513 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1514 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1515 | |
d9bc7a44 | 1516 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1517 | { |
695344c0 | 1518 | /* xgettext:c-format */ |
871b3ab2 | 1519 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1520 | abfd, r_symndx); |
c337a162 | 1521 | goto error_return; |
f5f31454 L |
1522 | } |
1523 | ||
252b5132 | 1524 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1525 | { |
1526 | /* A local symbol. */ | |
f1dfbfdb | 1527 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
c2e61a4e L |
1528 | abfd, r_symndx); |
1529 | if (isym == NULL) | |
c337a162 | 1530 | goto error_return; |
c25bc9fc L |
1531 | |
1532 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1533 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1534 | { | |
0a1b45a2 | 1535 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, true); |
c25bc9fc | 1536 | if (h == NULL) |
c337a162 | 1537 | goto error_return; |
6bbec505 | 1538 | |
c25bc9fc | 1539 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1540 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1541 | isym, NULL); | |
c25bc9fc L |
1542 | h->type = STT_GNU_IFUNC; |
1543 | h->def_regular = 1; | |
1544 | h->ref_regular = 1; | |
1545 | h->forced_local = 1; | |
1546 | h->root.type = bfd_link_hash_defined; | |
1547 | } | |
1548 | else | |
1549 | h = NULL; | |
1550 | } | |
252b5132 | 1551 | else |
71cb9464 | 1552 | { |
4c544807 | 1553 | isym = NULL; |
71cb9464 L |
1554 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1555 | while (h->root.type == bfd_link_hash_indirect | |
1556 | || h->root.type == bfd_link_hash_warning) | |
1557 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1558 | } |
cbe950e9 | 1559 | |
0afcef53 | 1560 | eh = (struct elf_x86_link_hash_entry *) h; |
c25bc9fc L |
1561 | if (h != NULL) |
1562 | { | |
f604c2a2 L |
1563 | if (r_type == R_386_GOTOFF) |
1564 | eh->gotoff_ref = 1; | |
cbe950e9 | 1565 | |
ad1e85de L |
1566 | /* It is referenced by a non-shared object. */ |
1567 | h->ref_regular = 1; | |
71cb9464 | 1568 | } |
252b5132 | 1569 | |
6999821f L |
1570 | if (r_type == R_386_GOT32X |
1571 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1572 | { | |
1573 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1574 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
5e5e02ae L |
1575 | &r_type, irel, h, |
1576 | &converted, info)) | |
6999821f L |
1577 | goto error_return; |
1578 | } | |
1579 | ||
382aae06 L |
1580 | if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym, |
1581 | symtab_hdr, &no_dynreloc)) | |
0a1b45a2 | 1582 | return false; |
382aae06 | 1583 | |
bedfd056 | 1584 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1585 | symtab_hdr, sym_hashes, |
1586 | &r_type, GOT_UNKNOWN, | |
0a1b45a2 | 1587 | rel, rel_end, h, r_symndx, false)) |
c337a162 | 1588 | goto error_return; |
13ae64f3 | 1589 | |
cd048363 L |
1590 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
1591 | if (h == htab->elf.hgot) | |
0a1b45a2 | 1592 | htab->got_referenced = true; |
cd048363 | 1593 | |
13ae64f3 | 1594 | switch (r_type) |
252b5132 | 1595 | { |
37e55690 | 1596 | case R_386_TLS_LDM: |
0f09b4d8 | 1597 | htab->tls_ld_or_ldm_got.refcount = 1; |
37e55690 JJ |
1598 | goto create_got; |
1599 | ||
1600 | case R_386_PLT32: | |
1601 | /* This symbol requires a procedure linkage table entry. We | |
1602 | actually build the entry in adjust_dynamic_symbol, | |
1603 | because this might be a case of linking PIC code which is | |
1604 | never referenced by a dynamic object, in which case we | |
1605 | don't need to generate a procedure linkage table entry | |
1606 | after all. */ | |
1607 | ||
1608 | /* If this is a local symbol, we resolve it directly without | |
1609 | creating a procedure linkage table entry. */ | |
1610 | if (h == NULL) | |
1611 | continue; | |
1612 | ||
98b273dc | 1613 | eh->zero_undefweak &= 0x2; |
f5385ebf | 1614 | h->needs_plt = 1; |
79b0c981 | 1615 | h->plt.refcount = 1; |
37e55690 JJ |
1616 | break; |
1617 | ||
6a3e1bae | 1618 | case R_386_SIZE32: |
0a1b45a2 | 1619 | size_reloc = true; |
6a3e1bae L |
1620 | goto do_size; |
1621 | ||
13ae64f3 | 1622 | case R_386_TLS_IE_32: |
37e55690 JJ |
1623 | case R_386_TLS_IE: |
1624 | case R_386_TLS_GOTIE: | |
0e1862bb | 1625 | if (!bfd_link_executable (info)) |
13ae64f3 | 1626 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1627 | /* Fall through */ |
1628 | ||
252b5132 | 1629 | case R_386_GOT32: |
02a86693 | 1630 | case R_386_GOT32X: |
13ae64f3 | 1631 | case R_386_TLS_GD: |
67a4f2b7 AO |
1632 | case R_386_TLS_GOTDESC: |
1633 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1634 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1635 | { |
1636 | int tls_type, old_tls_type; | |
1637 | ||
1638 | switch (r_type) | |
1639 | { | |
1640 | default: | |
02a86693 L |
1641 | case R_386_GOT32: |
1642 | case R_386_GOT32X: | |
1643 | tls_type = GOT_NORMAL; | |
1644 | break; | |
13ae64f3 | 1645 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1646 | case R_386_TLS_GOTDESC: |
1647 | case R_386_TLS_DESC_CALL: | |
1648 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1649 | case R_386_TLS_IE_32: |
1650 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1651 | tls_type = GOT_TLS_IE_NEG; | |
1652 | else | |
ebcfb3c0 JJ |
1653 | /* If this is a GD->IE transition, we may use either of |
1654 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1655 | tls_type = GOT_TLS_IE; |
1656 | break; | |
1657 | case R_386_TLS_IE: | |
1658 | case R_386_TLS_GOTIE: | |
1659 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1660 | } |
1661 | ||
1662 | if (h != NULL) | |
1663 | { | |
0f09b4d8 | 1664 | h->got.refcount = 1; |
0afcef53 | 1665 | old_tls_type = elf_x86_hash_entry (h)->tls_type; |
13ae64f3 JJ |
1666 | } |
1667 | else | |
1668 | { | |
1669 | bfd_signed_vma *local_got_refcounts; | |
1670 | ||
1671 | /* This is a global offset table entry for a local symbol. */ | |
1672 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1673 | if (local_got_refcounts == NULL) | |
1674 | { | |
1675 | bfd_size_type size; | |
1676 | ||
1677 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1678 | size *= (sizeof (bfd_signed_vma) |
1679 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 | 1680 | local_got_refcounts = (bfd_signed_vma *) |
07d6d2b8 | 1681 | bfd_zalloc (abfd, size); |
13ae64f3 | 1682 | if (local_got_refcounts == NULL) |
c337a162 | 1683 | goto error_return; |
13ae64f3 | 1684 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1685 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1686 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1687 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1688 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 | 1689 | } |
0f09b4d8 | 1690 | local_got_refcounts[r_symndx] = 1; |
0afcef53 | 1691 | old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
13ae64f3 JJ |
1692 | } |
1693 | ||
37e55690 JJ |
1694 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1695 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1696 | /* If a TLS symbol is accessed using IE at least once, |
1697 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1698 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1699 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1700 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1701 | { |
67a4f2b7 | 1702 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1703 | tls_type = old_tls_type; |
67a4f2b7 AO |
1704 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1705 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1706 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1707 | else |
1708 | { | |
09a24cbf | 1709 | if (h) |
4c544807 L |
1710 | name = h->root.root.string; |
1711 | else | |
1712 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1713 | NULL); | |
4eca0228 | 1714 | _bfd_error_handler |
695344c0 | 1715 | /* xgettext:c-format */ |
871b3ab2 | 1716 | (_("%pB: `%s' accessed both as normal and " |
55fd94b0 | 1717 | "thread local symbol"), |
4c544807 | 1718 | abfd, name); |
68c4a57e | 1719 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 1720 | goto error_return; |
13ae64f3 JJ |
1721 | } |
1722 | } | |
1723 | ||
1724 | if (old_tls_type != tls_type) | |
1725 | { | |
1726 | if (h != NULL) | |
0afcef53 | 1727 | elf_x86_hash_entry (h)->tls_type = tls_type; |
13ae64f3 | 1728 | else |
0afcef53 | 1729 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
13ae64f3 JJ |
1730 | } |
1731 | } | |
0ac8d2ca AM |
1732 | /* Fall through */ |
1733 | ||
1734 | case R_386_GOTOFF: | |
1735 | case R_386_GOTPC: | |
dc1e8a47 | 1736 | create_got: |
37e55690 | 1737 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1738 | { |
1739 | if (eh != NULL) | |
cd048363 L |
1740 | { |
1741 | eh->zero_undefweak &= 0x2; | |
1742 | ||
1743 | /* Need GOT to resolve undefined weak symbol to 0. */ | |
1744 | if (r_type == R_386_GOTOFF | |
1745 | && h->root.type == bfd_link_hash_undefweak | |
1746 | && bfd_link_executable (info)) | |
0a1b45a2 | 1747 | htab->got_referenced = true; |
cd048363 | 1748 | } |
aec6b87e L |
1749 | break; |
1750 | } | |
37e55690 | 1751 | /* Fall through */ |
252b5132 | 1752 | |
37e55690 JJ |
1753 | case R_386_TLS_LE_32: |
1754 | case R_386_TLS_LE: | |
aec6b87e | 1755 | if (eh != NULL) |
98b273dc | 1756 | eh->zero_undefweak &= 0x2; |
0e1862bb | 1757 | if (bfd_link_executable (info)) |
37e55690 | 1758 | break; |
bffbf940 | 1759 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1760 | goto do_relocation; |
252b5132 RH |
1761 | |
1762 | case R_386_32: | |
1763 | case R_386_PC32: | |
aec6b87e | 1764 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 1765 | eh->zero_undefweak |= 0x2; |
dc1e8a47 | 1766 | do_relocation: |
bf52d7c7 L |
1767 | /* We are called after all symbols have been resolved. Only |
1768 | relocation against STT_GNU_IFUNC symbol must go through | |
1769 | PLT. */ | |
d1ed1c7d L |
1770 | if (h != NULL |
1771 | && (bfd_link_executable (info) | |
bf52d7c7 | 1772 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 1773 | { |
0a1b45a2 | 1774 | bool func_pointer_ref = false; |
233cc9c1 | 1775 | |
4b627c18 L |
1776 | if (r_type == R_386_PC32) |
1777 | { | |
1778 | /* Since something like ".long foo - ." may be used | |
1779 | as pointer, make sure that PLT is used if foo is | |
1780 | a function defined in a shared library. */ | |
1781 | if ((sec->flags & SEC_CODE) == 0) | |
1782 | h->pointer_equality_needed = 1; | |
74437ea2 L |
1783 | else if (h->type == STT_GNU_IFUNC |
1784 | && bfd_link_pic (info)) | |
1785 | { | |
6322e5c5 L |
1786 | _bfd_error_handler |
1787 | /* xgettext:c-format */ | |
871b3ab2 | 1788 | (_("%pB: unsupported non-PIC call to IFUNC `%s'"), |
6322e5c5 | 1789 | abfd, h->root.root.string); |
74437ea2 L |
1790 | bfd_set_error (bfd_error_bad_value); |
1791 | goto error_return; | |
1792 | } | |
4b627c18 L |
1793 | } |
1794 | else | |
04ebc307 L |
1795 | { |
1796 | h->pointer_equality_needed = 1; | |
1797 | /* R_386_32 can be resolved at run-time. */ | |
1798 | if (r_type == R_386_32 | |
1799 | && (sec->flags & SEC_READONLY) == 0) | |
0a1b45a2 | 1800 | func_pointer_ref = true; |
79b0c981 L |
1801 | } |
1802 | ||
1803 | if (!func_pointer_ref) | |
1804 | { | |
1805 | /* If this reloc is in a read-only section, we might | |
1806 | need a copy reloc. We can't check reliably at this | |
1807 | stage whether the section is read-only, as input | |
1808 | sections have not yet been mapped to output sections. | |
1809 | Tentatively set the flag for now, and correct in | |
1810 | adjust_dynamic_symbol. */ | |
1811 | h->non_got_ref = 1; | |
1812 | ||
6f365fda L |
1813 | if (!elf_has_indirect_extern_access (sec->owner)) |
1814 | eh->non_got_ref_without_indirect_extern_access = 1; | |
1815 | ||
79b0c981 L |
1816 | /* We may need a .plt entry if the symbol is a function |
1817 | defined in a shared lib or is a function referenced | |
1818 | from the code or read-only section. */ | |
1819 | if (!h->def_regular | |
1820 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
1821 | h->plt.refcount = 1; | |
04ebc307 | 1822 | } |
6725bdbf | 1823 | } |
7843f00e | 1824 | |
0a1b45a2 | 1825 | size_reloc = false; |
dc1e8a47 | 1826 | do_size: |
382aae06 | 1827 | if (!no_dynreloc |
831083d3 L |
1828 | && NEED_DYNAMIC_RELOCATION_P (false, info, false, h, sec, |
1829 | r_type, R_386_32)) | |
252b5132 | 1830 | { |
e03a8ed8 L |
1831 | struct elf_dyn_relocs *p; |
1832 | struct elf_dyn_relocs **head; | |
ec338859 | 1833 | |
12d0ee4a AM |
1834 | /* We must copy these reloc types into the output file. |
1835 | Create a reloc section in dynobj and make room for | |
1836 | this reloc. */ | |
252b5132 RH |
1837 | if (sreloc == NULL) |
1838 | { | |
83bac4b0 | 1839 | sreloc = _bfd_elf_make_dynamic_reloc_section |
0a1b45a2 | 1840 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ false); |
83bac4b0 | 1841 | |
252b5132 | 1842 | if (sreloc == NULL) |
c337a162 | 1843 | goto error_return; |
252b5132 RH |
1844 | } |
1845 | ||
0c715baa AM |
1846 | /* If this is a global symbol, we count the number of |
1847 | relocations we need for this symbol. */ | |
1848 | if (h != NULL) | |
252b5132 | 1849 | { |
190eb1dd | 1850 | head = &h->dyn_relocs; |
0c715baa AM |
1851 | } |
1852 | else | |
1853 | { | |
ec338859 AM |
1854 | /* Track dynamic relocs needed for local syms too. |
1855 | We really need local syms available to do this | |
1856 | easily. Oh well. */ | |
87d72d41 | 1857 | void **vpp; |
ec338859 | 1858 | asection *s; |
87d72d41 | 1859 | |
f1dfbfdb | 1860 | isym = bfd_sym_from_r_symndx (&htab->elf.sym_cache, |
87d72d41 AM |
1861 | abfd, r_symndx); |
1862 | if (isym == NULL) | |
c337a162 | 1863 | goto error_return; |
87d72d41 AM |
1864 | |
1865 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1866 | if (s == NULL) |
87d72d41 | 1867 | s = sec; |
ec338859 | 1868 | |
e81d3500 | 1869 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1870 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1871 | } |
1872 | ||
1873 | p = *head; | |
1874 | if (p == NULL || p->sec != sec) | |
1875 | { | |
986f0783 | 1876 | size_t amt = sizeof *p; |
a50b1753 | 1877 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
07d6d2b8 | 1878 | amt); |
ec338859 | 1879 | if (p == NULL) |
c337a162 | 1880 | goto error_return; |
ec338859 AM |
1881 | p->next = *head; |
1882 | *head = p; | |
1883 | p->sec = sec; | |
1884 | p->count = 0; | |
1885 | p->pc_count = 0; | |
252b5132 | 1886 | } |
ec338859 AM |
1887 | |
1888 | p->count += 1; | |
06a6a421 L |
1889 | /* Count size relocation as PC-relative relocation. */ |
1890 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1891 | p->pc_count += 1; |
252b5132 | 1892 | } |
252b5132 RH |
1893 | break; |
1894 | ||
1895 | /* This relocation describes the C++ object vtable hierarchy. | |
1896 | Reconstruct it for later use during GC. */ | |
1897 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1898 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 1899 | goto error_return; |
252b5132 RH |
1900 | break; |
1901 | ||
1902 | /* This relocation describes which C++ vtable entries are actually | |
1903 | used. Record for later use during GC. */ | |
1904 | case R_386_GNU_VTENTRY: | |
a0ea3a14 | 1905 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
c337a162 | 1906 | goto error_return; |
252b5132 RH |
1907 | break; |
1908 | ||
1909 | default: | |
1910 | break; | |
1911 | } | |
1912 | } | |
1913 | ||
bedfd056 L |
1914 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1915 | { | |
a8dde0a2 | 1916 | if (!converted && !_bfd_link_keep_memory (info)) |
bedfd056 L |
1917 | free (contents); |
1918 | else | |
1919 | { | |
5e5e02ae L |
1920 | /* Cache the section contents for elf_link_input_bfd if any |
1921 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 | 1922 | elf_section_data (sec)->this_hdr.contents = contents; |
a8dde0a2 | 1923 | info->cache_size += sec->size; |
bedfd056 L |
1924 | } |
1925 | } | |
1926 | ||
5e5e02ae L |
1927 | /* Cache relocations if any load is converted. */ |
1928 | if (elf_section_data (sec)->relocs != relocs && converted) | |
1929 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
1930 | ||
0a1b45a2 | 1931 | return true; |
c337a162 | 1932 | |
dc1e8a47 | 1933 | error_return: |
bedfd056 L |
1934 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1935 | free (contents); | |
c337a162 | 1936 | sec->check_relocs_failed = 1; |
0a1b45a2 | 1937 | return false; |
252b5132 RH |
1938 | } |
1939 | ||
38701953 AM |
1940 | /* Set the correct type for an x86 ELF section. We do this by the |
1941 | section name, which is a hack, but ought to work. */ | |
1942 | ||
0a1b45a2 | 1943 | static bool |
55fd94b0 AM |
1944 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
1945 | Elf_Internal_Shdr *hdr, | |
1946 | asection *sec) | |
38701953 | 1947 | { |
91d6fa6a | 1948 | const char *name; |
38701953 | 1949 | |
fd361982 | 1950 | name = bfd_section_name (sec); |
38701953 AM |
1951 | |
1952 | /* This is an ugly, but unfortunately necessary hack that is | |
1953 | needed when producing EFI binaries on x86. It tells | |
1954 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1955 | containing ELF relocation info. We need this hack in order to | |
1956 | be able to generate ELF binaries that can be translated into | |
1957 | EFI applications (which are essentially COFF objects). Those | |
1958 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1959 | which would normally cause BFD to segfault because it would | |
1960 | attempt to interpret this section as containing relocation | |
1961 | entries for section "oc". With this hack enabled, ".reloc" | |
1962 | will be treated as a normal data section, which will avoid the | |
1963 | segfault. However, you won't be able to create an ELFNN binary | |
1964 | with a section named "oc" that needs relocations, but that's | |
1965 | the kind of ugly side-effects you get when detecting section | |
1966 | types based on their names... In practice, this limitation is | |
1967 | unlikely to bite. */ | |
1968 | if (strcmp (name, ".reloc") == 0) | |
1969 | hdr->sh_type = SHT_PROGBITS; | |
1970 | ||
0a1b45a2 | 1971 | return true; |
38701953 AM |
1972 | } |
1973 | ||
13ae64f3 JJ |
1974 | /* Return the relocation value for @tpoff relocation |
1975 | if STT_TLS virtual address is ADDRESS. */ | |
1976 | ||
1977 | static bfd_vma | |
eb4ff4d6 | 1978 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 1979 | { |
e1918d23 | 1980 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
1981 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
1982 | bfd_vma static_tls_size; | |
13ae64f3 | 1983 | |
e1918d23 AM |
1984 | /* If tls_sec is NULL, we should have signalled an error already. */ |
1985 | if (htab->tls_sec == NULL) | |
6a30718d | 1986 | return 0; |
7dc98aea RO |
1987 | |
1988 | /* Consider special static TLS alignment requirements. */ | |
1989 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
1990 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
1991 | } |
1992 | ||
252b5132 RH |
1993 | /* Relocate an i386 ELF section. */ |
1994 | ||
0f684201 | 1995 | static int |
55fd94b0 AM |
1996 | elf_i386_relocate_section (bfd *output_bfd, |
1997 | struct bfd_link_info *info, | |
1998 | bfd *input_bfd, | |
1999 | asection *input_section, | |
2000 | bfd_byte *contents, | |
2001 | Elf_Internal_Rela *relocs, | |
2002 | Elf_Internal_Sym *local_syms, | |
2003 | asection **local_sections) | |
252b5132 | 2004 | { |
0afcef53 | 2005 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
2006 | Elf_Internal_Shdr *symtab_hdr; |
2007 | struct elf_link_hash_entry **sym_hashes; | |
2008 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2009 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 2010 | Elf_Internal_Rela *rel; |
60f2e42e | 2011 | Elf_Internal_Rela *wrel; |
252b5132 | 2012 | Elf_Internal_Rela *relend; |
0a1b45a2 | 2013 | bool is_vxworks_tls; |
25e762b9 | 2014 | unsigned plt_entry_size; |
252b5132 | 2015 | |
c337a162 L |
2016 | /* Skip if check_relocs failed. */ |
2017 | if (input_section->check_relocs_failed) | |
0a1b45a2 | 2018 | return false; |
c337a162 | 2019 | |
0afcef53 | 2020 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 2021 | if (htab == NULL) |
0a1b45a2 | 2022 | return false; |
fe53b4a4 | 2023 | |
7af5d5c4 AM |
2024 | if (!is_x86_elf (input_bfd, htab)) |
2025 | { | |
2026 | bfd_set_error (bfd_error_wrong_format); | |
0a1b45a2 | 2027 | return false; |
7af5d5c4 | 2028 | } |
fe53b4a4 | 2029 | |
0ffa91dd | 2030 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
2031 | sym_hashes = elf_sym_hashes (input_bfd); |
2032 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2033 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
2034 | /* We have to handle relocations in vxworks .tls_vars sections |
2035 | specially, because the dynamic loader is 'weird'. */ | |
90c14f0c | 2036 | is_vxworks_tls = (htab->elf.target_os == is_vxworks |
07d6d2b8 | 2037 | && bfd_link_pic (info) |
3348747a NS |
2038 | && !strcmp (input_section->output_section->name, |
2039 | ".tls_vars")); | |
252b5132 | 2040 | |
0afcef53 | 2041 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2042 | |
765e526c | 2043 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 2044 | |
60f2e42e | 2045 | rel = wrel = relocs; |
252b5132 | 2046 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2047 | for (; rel < relend; wrel++, rel++) |
252b5132 | 2048 | { |
419414ea | 2049 | unsigned int r_type, r_type_tls; |
252b5132 RH |
2050 | reloc_howto_type *howto; |
2051 | unsigned long r_symndx; | |
2052 | struct elf_link_hash_entry *h; | |
0afcef53 | 2053 | struct elf_x86_link_hash_entry *eh; |
252b5132 RH |
2054 | Elf_Internal_Sym *sym; |
2055 | asection *sec; | |
dd7e64d4 | 2056 | bfd_vma off, offplt, plt_offset; |
252b5132 | 2057 | bfd_vma relocation; |
0a1b45a2 | 2058 | bool unresolved_reloc; |
252b5132 | 2059 | bfd_reloc_status_type r; |
1b452ec6 | 2060 | unsigned int indx; |
13ae64f3 | 2061 | int tls_type; |
1788fc08 | 2062 | bfd_vma st_size; |
dd7e64d4 | 2063 | asection *resolved_plt; |
0a1b45a2 AM |
2064 | bool resolved_to_zero; |
2065 | bool relative_reloc; | |
252b5132 RH |
2066 | |
2067 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2068 | if (r_type == R_386_GNU_VTINHERIT |
2069 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
2070 | { |
2071 | if (wrel != rel) | |
2072 | *wrel = *rel; | |
2073 | continue; | |
2074 | } | |
dc47f327 | 2075 | |
1273b2f8 | 2076 | howto = elf_i386_rtype_to_howto (r_type); |
76268e02 | 2077 | if (howto == NULL) |
47aeb64c NC |
2078 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
2079 | ||
252b5132 | 2080 | r_symndx = ELF32_R_SYM (rel->r_info); |
252b5132 RH |
2081 | h = NULL; |
2082 | sym = NULL; | |
2083 | sec = NULL; | |
0a1b45a2 | 2084 | unresolved_reloc = false; |
252b5132 RH |
2085 | if (r_symndx < symtab_hdr->sh_info) |
2086 | { | |
2087 | sym = local_syms + r_symndx; | |
2088 | sec = local_sections[r_symndx]; | |
2089 | relocation = (sec->output_section->vma | |
2090 | + sec->output_offset | |
2091 | + sym->st_value); | |
1788fc08 | 2092 | st_size = sym->st_size; |
ab96bf03 AM |
2093 | |
2094 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
2095 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 2096 | || (bfd_link_relocatable (info) |
ab96bf03 | 2097 | && sec->output_offset != 0))) |
f8df10f4 | 2098 | { |
f8df10f4 | 2099 | bfd_vma addend; |
4a335f3d | 2100 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2101 | |
4a335f3d | 2102 | switch (howto->size) |
f8df10f4 | 2103 | { |
4a335f3d AM |
2104 | case 0: |
2105 | addend = bfd_get_8 (input_bfd, where); | |
2106 | if (howto->pc_relative) | |
2107 | { | |
2108 | addend = (addend ^ 0x80) - 0x80; | |
2109 | addend += 1; | |
2110 | } | |
2111 | break; | |
2112 | case 1: | |
2113 | addend = bfd_get_16 (input_bfd, where); | |
2114 | if (howto->pc_relative) | |
2115 | { | |
2116 | addend = (addend ^ 0x8000) - 0x8000; | |
2117 | addend += 2; | |
2118 | } | |
2119 | break; | |
2120 | case 2: | |
2121 | addend = bfd_get_32 (input_bfd, where); | |
2122 | if (howto->pc_relative) | |
2123 | { | |
2124 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2125 | addend += 4; | |
2126 | } | |
2127 | break; | |
2128 | default: | |
2129 | abort (); | |
f8df10f4 JJ |
2130 | } |
2131 | ||
0e1862bb | 2132 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
2133 | addend += sec->output_offset; |
2134 | else | |
2135 | { | |
2136 | asection *msec = sec; | |
2137 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
2138 | addend); | |
2139 | addend -= relocation; | |
2140 | addend += msec->output_section->vma + msec->output_offset; | |
2141 | } | |
4a335f3d AM |
2142 | |
2143 | switch (howto->size) | |
2144 | { | |
2145 | case 0: | |
16a10388 | 2146 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2147 | if (howto->pc_relative) |
2148 | addend -= 1; | |
2149 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2150 | break; |
2151 | case 1: | |
2152 | if (howto->pc_relative) | |
2153 | addend -= 2; | |
2154 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2155 | break; |
2156 | case 2: | |
2157 | if (howto->pc_relative) | |
2158 | addend -= 4; | |
2159 | bfd_put_32 (input_bfd, addend, where); | |
2160 | break; | |
2161 | } | |
f8df10f4 | 2162 | } |
0e1862bb | 2163 | else if (!bfd_link_relocatable (info) |
1f85278f | 2164 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
2165 | { |
2166 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0afcef53 | 2167 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel, |
0a1b45a2 | 2168 | false); |
c25bc9fc L |
2169 | if (h == NULL) |
2170 | abort (); | |
2171 | ||
23209a78 | 2172 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2173 | h->root.u.def.value = sym->st_value; |
2174 | h->root.u.def.section = sec; | |
2175 | } | |
252b5132 RH |
2176 | } |
2177 | else | |
2178 | { | |
0a1b45a2 AM |
2179 | bool warned ATTRIBUTE_UNUSED; |
2180 | bool ignored ATTRIBUTE_UNUSED; | |
ffb2e45b | 2181 | |
b2a8e766 AM |
2182 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2183 | r_symndx, symtab_hdr, sym_hashes, | |
2184 | h, sec, relocation, | |
62d887d4 | 2185 | unresolved_reloc, warned, ignored); |
1788fc08 | 2186 | st_size = h->size; |
252b5132 RH |
2187 | } |
2188 | ||
dbaa2011 | 2189 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2190 | { |
2191 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2192 | contents, rel->r_offset); |
60f2e42e L |
2193 | wrel->r_offset = rel->r_offset; |
2194 | wrel->r_info = 0; | |
2195 | wrel->r_addend = 0; | |
2196 | ||
2197 | /* For ld -r, remove relocations in debug sections against | |
2198 | sections defined in discarded sections. Not done for | |
2199 | eh_frame editing code expects to be present. */ | |
2200 | if (bfd_link_relocatable (info) | |
2201 | && (input_section->flags & SEC_DEBUGGING)) | |
2202 | wrel--; | |
2203 | ||
2204 | continue; | |
2205 | } | |
9635fe29 | 2206 | |
0e1862bb | 2207 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2208 | { |
2209 | if (wrel != rel) | |
2210 | *wrel = *rel; | |
2211 | continue; | |
2212 | } | |
ab96bf03 | 2213 | |
0afcef53 | 2214 | eh = (struct elf_x86_link_hash_entry *) h; |
ee2fdd6f | 2215 | |
cbe950e9 L |
2216 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2217 | it here if it is defined in a non-shared object. */ | |
2218 | if (h != NULL | |
2219 | && h->type == STT_GNU_IFUNC | |
2220 | && h->def_regular) | |
2221 | { | |
ee2fdd6f | 2222 | asection *gotplt, *base_got; |
cbe950e9 | 2223 | bfd_vma plt_index; |
4c544807 | 2224 | const char *name; |
cbe950e9 | 2225 | |
97dc35c8 L |
2226 | if ((input_section->flags & SEC_ALLOC) == 0) |
2227 | { | |
347a8774 L |
2228 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2229 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2230 | if (elf_section_type (input_section) == SHT_NOTE) | |
2231 | goto skip_ifunc; | |
97dc35c8 L |
2232 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2233 | sections because such sections are not SEC_ALLOC and | |
2234 | thus ld.so will not process them. */ | |
2235 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2236 | continue; |
97dc35c8 L |
2237 | abort (); |
2238 | } | |
cbe950e9 L |
2239 | |
2240 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2241 | if (htab->elf.splt != NULL) |
cbe950e9 | 2242 | { |
ee2fdd6f L |
2243 | if (htab->plt_second != NULL) |
2244 | { | |
2245 | resolved_plt = htab->plt_second; | |
2246 | plt_offset = eh->plt_second.offset; | |
2247 | } | |
2248 | else | |
2249 | { | |
2250 | resolved_plt = htab->elf.splt; | |
2251 | plt_offset = h->plt.offset; | |
2252 | } | |
6de2ae4a | 2253 | gotplt = htab->elf.sgotplt; |
cbe950e9 L |
2254 | } |
2255 | else | |
2256 | { | |
ee2fdd6f L |
2257 | resolved_plt = htab->elf.iplt; |
2258 | plt_offset = h->plt.offset; | |
6de2ae4a | 2259 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2260 | } |
2261 | ||
cbe950e9 L |
2262 | switch (r_type) |
2263 | { | |
2264 | default: | |
233cc9c1 | 2265 | break; |
cbe950e9 L |
2266 | |
2267 | case R_386_GOT32: | |
02a86693 | 2268 | case R_386_GOT32X: |
6de2ae4a | 2269 | base_got = htab->elf.sgot; |
cbe950e9 L |
2270 | off = h->got.offset; |
2271 | ||
7afd84dc | 2272 | if (base_got == NULL) |
cbe950e9 L |
2273 | abort (); |
2274 | ||
7afd84dc | 2275 | if (off == (bfd_vma) -1) |
cbe950e9 | 2276 | { |
7afd84dc L |
2277 | /* We can't use h->got.offset here to save state, or |
2278 | even just remember the offset, as finish_dynamic_symbol | |
2279 | would use that as offset into .got. */ | |
6bbec505 | 2280 | |
233cc9c1 L |
2281 | if (h->plt.offset == (bfd_vma) -1) |
2282 | abort (); | |
2283 | ||
6de2ae4a | 2284 | if (htab->elf.splt != NULL) |
7afd84dc | 2285 | { |
f604c2a2 | 2286 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2287 | - htab->plt.has_plt0); |
7afd84dc | 2288 | off = (plt_index + 3) * 4; |
6de2ae4a | 2289 | base_got = htab->elf.sgotplt; |
7afd84dc | 2290 | } |
cbe950e9 L |
2291 | else |
2292 | { | |
25e762b9 | 2293 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 2294 | off = plt_index * 4; |
6de2ae4a | 2295 | base_got = htab->elf.igotplt; |
7afd84dc L |
2296 | } |
2297 | ||
2298 | if (h->dynindx == -1 | |
2299 | || h->forced_local | |
2300 | || info->symbolic) | |
2301 | { | |
2302 | /* This references the local defitionion. We must | |
2303 | initialize this entry in the global offset table. | |
cfe29d94 | 2304 | Since the offset must always be a multiple of 4, |
7afd84dc L |
2305 | we use the least significant bit to record |
2306 | whether we have initialized it already. | |
2307 | ||
2308 | When doing a dynamic link, we create a .rela.got | |
2309 | relocation entry to initialize the value. This | |
2310 | is done in the finish_dynamic_symbol routine. */ | |
2311 | if ((off & 1) != 0) | |
2312 | off &= ~1; | |
2313 | else | |
2314 | { | |
2315 | bfd_put_32 (output_bfd, relocation, | |
2316 | base_got->contents + off); | |
2317 | h->got.offset |= 1; | |
2318 | } | |
cbe950e9 | 2319 | } |
cbe950e9 | 2320 | |
7afd84dc | 2321 | relocation = off; |
7afd84dc L |
2322 | } |
2323 | else | |
ca8c86ef L |
2324 | relocation = (base_got->output_section->vma |
2325 | + base_got->output_offset + off | |
2326 | - gotplt->output_section->vma | |
2327 | - gotplt->output_offset); | |
2328 | ||
2a568401 L |
2329 | if (rel->r_offset > 1 |
2330 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2331 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
2332 | { |
2333 | if (bfd_link_pic (info)) | |
2334 | goto disallow_got32; | |
2335 | ||
2336 | /* Add the GOT base if there is no base register. */ | |
2337 | relocation += (gotplt->output_section->vma | |
2338 | + gotplt->output_offset); | |
2339 | } | |
2340 | else if (htab->elf.splt == NULL) | |
2341 | { | |
2342 | /* Adjust for static executables. */ | |
2343 | relocation += gotplt->output_offset; | |
2344 | } | |
0018b0a3 | 2345 | |
cbe950e9 | 2346 | goto do_relocation; |
233cc9c1 L |
2347 | } |
2348 | ||
2349 | if (h->plt.offset == (bfd_vma) -1) | |
2350 | { | |
2351 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2352 | if (r_type == R_386_32 | |
2353 | && (input_section->flags & SEC_CODE) == 0) | |
2354 | goto do_ifunc_pointer; | |
2355 | goto bad_ifunc_reloc; | |
2356 | } | |
2357 | ||
ee2fdd6f L |
2358 | relocation = (resolved_plt->output_section->vma |
2359 | + resolved_plt->output_offset + plt_offset); | |
233cc9c1 L |
2360 | |
2361 | switch (r_type) | |
2362 | { | |
2363 | default: | |
dc1e8a47 | 2364 | bad_ifunc_reloc: |
233cc9c1 L |
2365 | if (h->root.root.string) |
2366 | name = h->root.root.string; | |
2367 | else | |
2368 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2369 | NULL); | |
4eca0228 | 2370 | _bfd_error_handler |
695344c0 | 2371 | /* xgettext:c-format */ |
871b3ab2 | 2372 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2373 | "symbol `%s' isn't supported"), input_bfd, |
2374 | howto->name, name); | |
2375 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 2376 | return false; |
233cc9c1 L |
2377 | |
2378 | case R_386_32: | |
2379 | /* Generate dynamic relcoation only when there is a | |
2380 | non-GOT reference in a shared object. */ | |
2381 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2382 | || h->plt.offset == (bfd_vma) -1) | |
2383 | { | |
2384 | Elf_Internal_Rela outrel; | |
2385 | asection *sreloc; | |
2386 | bfd_vma offset; | |
2387 | ||
dc1e8a47 | 2388 | do_ifunc_pointer: |
233cc9c1 L |
2389 | /* Need a dynamic relocation to get the real function |
2390 | adddress. */ | |
2391 | offset = _bfd_elf_section_offset (output_bfd, | |
2392 | info, | |
2393 | input_section, | |
2394 | rel->r_offset); | |
2395 | if (offset == (bfd_vma) -1 | |
2396 | || offset == (bfd_vma) -2) | |
2397 | abort (); | |
2398 | ||
2399 | outrel.r_offset = (input_section->output_section->vma | |
2400 | + input_section->output_offset | |
2401 | + offset); | |
2402 | ||
cf1070f1 | 2403 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
233cc9c1 | 2404 | { |
871b3ab2 | 2405 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2406 | h->root.root.string, |
2407 | h->root.u.def.section->owner); | |
2408 | ||
233cc9c1 L |
2409 | /* This symbol is resolved locally. */ |
2410 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
68b00778 L |
2411 | |
2412 | if (htab->params->report_relative_reloc) | |
2413 | _bfd_x86_elf_link_report_relative_reloc | |
2414 | (info, input_section, h, sym, | |
2415 | "R_386_IRELATIVE", &outrel); | |
2416 | ||
233cc9c1 L |
2417 | bfd_put_32 (output_bfd, |
2418 | (h->root.u.def.value | |
2419 | + h->root.u.def.section->output_section->vma | |
2420 | + h->root.u.def.section->output_offset), | |
2421 | contents + offset); | |
2422 | } | |
2423 | else | |
2424 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
2425 | ||
2426 | /* Dynamic relocations are stored in | |
2427 | 1. .rel.ifunc section in PIC object. | |
2428 | 2. .rel.got section in dynamic executable. | |
2429 | 3. .rel.iplt section in static executable. */ | |
2430 | if (bfd_link_pic (info)) | |
2431 | sreloc = htab->elf.irelifunc; | |
2432 | else if (htab->elf.splt != NULL) | |
2433 | sreloc = htab->elf.srelgot; | |
2434 | else | |
2435 | sreloc = htab->elf.irelplt; | |
2436 | elf_append_rel (output_bfd, sreloc, &outrel); | |
2437 | ||
2438 | /* If this reloc is against an external symbol, we | |
2439 | do not want to fiddle with the addend. Otherwise, | |
2440 | we need to include the symbol value so that it | |
2441 | becomes an addend for the dynamic reloc. For an | |
2442 | internal symbol, we have updated addend. */ | |
2443 | continue; | |
2444 | } | |
2445 | /* FALLTHROUGH */ | |
2446 | case R_386_PC32: | |
2447 | case R_386_PLT32: | |
2448 | goto do_relocation; | |
cbe950e9 L |
2449 | |
2450 | case R_386_GOTOFF: | |
2451 | relocation -= (gotplt->output_section->vma | |
2452 | + gotplt->output_offset); | |
2453 | goto do_relocation; | |
2454 | } | |
2455 | } | |
2456 | ||
dc1e8a47 | 2457 | skip_ifunc: |
aec6b87e | 2458 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2459 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2460 | |
252b5132 RH |
2461 | switch (r_type) |
2462 | { | |
02a86693 | 2463 | case R_386_GOT32X: |
252b5132 RH |
2464 | case R_386_GOT32: |
2465 | /* Relocation is to the entry for this symbol in the global | |
2466 | offset table. */ | |
6de2ae4a | 2467 | if (htab->elf.sgot == NULL) |
ffb2e45b | 2468 | abort (); |
252b5132 | 2469 | |
0a1b45a2 | 2470 | relative_reloc = false; |
252b5132 RH |
2471 | if (h != NULL) |
2472 | { | |
252b5132 | 2473 | off = h->got.offset; |
2eba97c2 | 2474 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
252b5132 | 2475 | { |
2eba97c2 L |
2476 | /* We must initialize this entry in the global offset |
2477 | table. Since the offset must always be a multiple | |
2478 | of 4, we use the least significant bit to record | |
2479 | whether we have initialized it already. | |
252b5132 RH |
2480 | |
2481 | When doing a dynamic link, we create a .rel.got | |
2482 | relocation entry to initialize the value. This | |
2483 | is done in the finish_dynamic_symbol routine. */ | |
2484 | if ((off & 1) != 0) | |
2485 | off &= ~1; | |
2486 | else | |
2487 | { | |
2488 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 2489 | htab->elf.sgot->contents + off); |
252b5132 | 2490 | h->got.offset |= 1; |
e133d005 | 2491 | |
f70656b2 | 2492 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
e133d005 L |
2493 | { |
2494 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 2495 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 | 2496 | eh->no_finish_dynamic_symbol = 1; |
0a1b45a2 | 2497 | relative_reloc = true; |
e133d005 | 2498 | } |
252b5132 RH |
2499 | } |
2500 | } | |
8c694914 | 2501 | else |
0a1b45a2 | 2502 | unresolved_reloc = false; |
252b5132 RH |
2503 | } |
2504 | else | |
2505 | { | |
ffb2e45b AM |
2506 | if (local_got_offsets == NULL) |
2507 | abort (); | |
252b5132 RH |
2508 | |
2509 | off = local_got_offsets[r_symndx]; | |
2510 | ||
2511 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2512 | the least significant bit to record whether we have |
2513 | already generated the necessary reloc. */ | |
252b5132 RH |
2514 | if ((off & 1) != 0) |
2515 | off &= ~1; | |
2516 | else | |
2517 | { | |
6725bdbf | 2518 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 2519 | htab->elf.sgot->contents + off); |
e133d005 | 2520 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 2521 | |
0e1862bb | 2522 | if (bfd_link_pic (info)) |
0a1b45a2 | 2523 | relative_reloc = true; |
252b5132 | 2524 | } |
252b5132 RH |
2525 | } |
2526 | ||
e133d005 L |
2527 | if (relative_reloc) |
2528 | { | |
2529 | asection *s; | |
2530 | Elf_Internal_Rela outrel; | |
2531 | ||
2532 | s = htab->elf.srelgot; | |
2533 | if (s == NULL) | |
2534 | abort (); | |
2535 | ||
2536 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
2537 | + htab->elf.sgot->output_offset | |
2538 | + off); | |
2539 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
68b00778 L |
2540 | |
2541 | if (htab->params->report_relative_reloc) | |
2542 | _bfd_x86_elf_link_report_relative_reloc | |
2543 | (info, input_section, h, sym, "R_386_RELATIVE", | |
2544 | &outrel); | |
2545 | ||
e133d005 L |
2546 | elf_append_rel (output_bfd, s, &outrel); |
2547 | } | |
2548 | ||
ffb2e45b AM |
2549 | if (off >= (bfd_vma) -2) |
2550 | abort (); | |
2551 | ||
74d7f0aa L |
2552 | relocation = (htab->elf.sgot->output_section->vma |
2553 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
2554 | if (rel->r_offset > 1 |
2555 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2556 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
2557 | { |
2558 | if (bfd_link_pic (info)) | |
2559 | { | |
2560 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
2561 | register, except for "lea foo@GOT, %reg", since |
2562 | we don't know what the GOT base is. */ | |
74d7f0aa L |
2563 | const char *name; |
2564 | ||
dc1e8a47 | 2565 | disallow_got32: |
a5def14f | 2566 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
2567 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
2568 | NULL); | |
2569 | else | |
2570 | name = h->root.root.string; | |
2571 | ||
4eca0228 | 2572 | _bfd_error_handler |
695344c0 | 2573 | /* xgettext:c-format */ |
871b3ab2 | 2574 | (_("%pB: direct GOT relocation %s against `%s'" |
63a5468a AM |
2575 | " without base register can not be used" |
2576 | " when making a shared object"), | |
712ec279 | 2577 | input_bfd, howto->name, name); |
74d7f0aa | 2578 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2579 | return false; |
74d7f0aa L |
2580 | } |
2581 | } | |
2582 | else | |
2583 | { | |
2584 | /* Subtract the .got.plt section address only with a base | |
2585 | register. */ | |
2586 | relocation -= (htab->elf.sgotplt->output_section->vma | |
2587 | + htab->elf.sgotplt->output_offset); | |
2588 | } | |
2589 | ||
252b5132 RH |
2590 | break; |
2591 | ||
2592 | case R_386_GOTOFF: | |
2593 | /* Relocation is relative to the start of the global offset | |
2594 | table. */ | |
2595 | ||
3d949995 L |
2596 | /* Check to make sure it isn't a protected function or data |
2597 | symbol for shared library since it may not be local when | |
2598 | used as function address or with copy relocation. We also | |
e3c0e327 | 2599 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 2600 | if (!bfd_link_executable (info) && h) |
90f487df | 2601 | { |
41bed6dd L |
2602 | if (!h->def_regular) |
2603 | { | |
2604 | const char *v; | |
2605 | ||
2606 | switch (ELF_ST_VISIBILITY (h->other)) | |
2607 | { | |
2608 | case STV_HIDDEN: | |
2609 | v = _("hidden symbol"); | |
2610 | break; | |
2611 | case STV_INTERNAL: | |
2612 | v = _("internal symbol"); | |
2613 | break; | |
2614 | case STV_PROTECTED: | |
2615 | v = _("protected symbol"); | |
2616 | break; | |
2617 | default: | |
2618 | v = _("symbol"); | |
2619 | break; | |
2620 | } | |
2621 | ||
4eca0228 | 2622 | _bfd_error_handler |
695344c0 | 2623 | /* xgettext:c-format */ |
871b3ab2 | 2624 | (_("%pB: relocation R_386_GOTOFF against undefined %s" |
63a5468a | 2625 | " `%s' can not be used when making a shared object"), |
41bed6dd L |
2626 | input_bfd, v, h->root.root.string); |
2627 | bfd_set_error (bfd_error_bad_value); | |
0a1b45a2 | 2628 | return false; |
41bed6dd | 2629 | } |
6999821f | 2630 | else if (!SYMBOL_REFERENCES_LOCAL_P (info, h) |
3d949995 L |
2631 | && (h->type == STT_FUNC |
2632 | || h->type == STT_OBJECT) | |
41bed6dd L |
2633 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
2634 | { | |
4eca0228 | 2635 | _bfd_error_handler |
695344c0 | 2636 | /* xgettext:c-format */ |
871b3ab2 | 2637 | (_("%pB: relocation R_386_GOTOFF against protected %s" |
63a5468a | 2638 | " `%s' can not be used when making a shared object"), |
3d949995 L |
2639 | input_bfd, |
2640 | h->type == STT_FUNC ? "function" : "data", | |
2641 | h->root.root.string); | |
41bed6dd | 2642 | bfd_set_error (bfd_error_bad_value); |
0a1b45a2 | 2643 | return false; |
41bed6dd | 2644 | } |
90f487df L |
2645 | } |
2646 | ||
8c37241b JJ |
2647 | /* Note that sgot is not involved in this |
2648 | calculation. We always want the start of .got.plt. If we | |
2649 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
2650 | permitted by the ABI, we might have to change this |
2651 | calculation. */ | |
6de2ae4a L |
2652 | relocation -= htab->elf.sgotplt->output_section->vma |
2653 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
2654 | break; |
2655 | ||
2656 | case R_386_GOTPC: | |
2657 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
2658 | relocation = htab->elf.sgotplt->output_section->vma |
2659 | + htab->elf.sgotplt->output_offset; | |
0a1b45a2 | 2660 | unresolved_reloc = false; |
252b5132 RH |
2661 | break; |
2662 | ||
2663 | case R_386_PLT32: | |
2664 | /* Relocation is to the entry for this symbol in the | |
2665 | procedure linkage table. */ | |
2666 | ||
dd5724d5 | 2667 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2668 | without using the procedure linkage table. */ |
252b5132 RH |
2669 | if (h == NULL) |
2670 | break; | |
2671 | ||
dd7e64d4 L |
2672 | if ((h->plt.offset == (bfd_vma) -1 |
2673 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2674 | || htab->elf.splt == NULL) |
252b5132 RH |
2675 | { |
2676 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2677 | happens when statically linking PIC code, or when |
2678 | using -Bsymbolic. */ | |
252b5132 RH |
2679 | break; |
2680 | } | |
2681 | ||
dd7e64d4 L |
2682 | if (h->plt.offset != (bfd_vma) -1) |
2683 | { | |
ee2fdd6f L |
2684 | if (htab->plt_second != NULL) |
2685 | { | |
2686 | resolved_plt = htab->plt_second; | |
2687 | plt_offset = eh->plt_second.offset; | |
2688 | } | |
2689 | else | |
2690 | { | |
2691 | resolved_plt = htab->elf.splt; | |
2692 | plt_offset = h->plt.offset; | |
2693 | } | |
dd7e64d4 L |
2694 | } |
2695 | else | |
2696 | { | |
2697 | resolved_plt = htab->plt_got; | |
2698 | plt_offset = eh->plt_got.offset; | |
2699 | } | |
2700 | ||
2701 | relocation = (resolved_plt->output_section->vma | |
2702 | + resolved_plt->output_offset | |
2703 | + plt_offset); | |
0a1b45a2 | 2704 | unresolved_reloc = false; |
252b5132 RH |
2705 | break; |
2706 | ||
1788fc08 | 2707 | case R_386_SIZE32: |
1788fc08 L |
2708 | /* Set to symbol size. */ |
2709 | relocation = st_size; | |
2710 | /* Fall through. */ | |
2711 | ||
252b5132 RH |
2712 | case R_386_32: |
2713 | case R_386_PC32: | |
3348747a NS |
2714 | if ((input_section->flags & SEC_ALLOC) == 0 |
2715 | || is_vxworks_tls) | |
ec338859 AM |
2716 | break; |
2717 | ||
831083d3 L |
2718 | if (GENERATE_DYNAMIC_RELOCATION_P (false, info, eh, r_type, |
2719 | sec, false, | |
2720 | resolved_to_zero, | |
aebcc8ff | 2721 | (r_type == R_386_PC32))) |
252b5132 | 2722 | { |
947216bf | 2723 | Elf_Internal_Rela outrel; |
0a1b45a2 | 2724 | bool skip, relocate; |
0c715baa | 2725 | asection *sreloc; |
252b5132 RH |
2726 | |
2727 | /* When generating a shared object, these relocations | |
2728 | are copied into the output file to be resolved at run | |
2729 | time. */ | |
2730 | ||
0a1b45a2 AM |
2731 | skip = false; |
2732 | relocate = false; | |
252b5132 | 2733 | |
c629eae0 JJ |
2734 | outrel.r_offset = |
2735 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2736 | rel->r_offset); | |
2737 | if (outrel.r_offset == (bfd_vma) -1) | |
0a1b45a2 | 2738 | skip = true; |
0bb2d96a | 2739 | else if (outrel.r_offset == (bfd_vma) -2) |
0a1b45a2 | 2740 | skip = true, relocate = true; |
252b5132 RH |
2741 | outrel.r_offset += (input_section->output_section->vma |
2742 | + input_section->output_offset); | |
2743 | ||
2744 | if (skip) | |
0bb2d96a | 2745 | memset (&outrel, 0, sizeof outrel); |
831083d3 | 2746 | else if (COPY_INPUT_RELOC_P (false, info, h, r_type)) |
0bb2d96a | 2747 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2748 | else |
2749 | { | |
5a15f56f | 2750 | /* This symbol is local, or marked to become local. */ |
0a1b45a2 | 2751 | relocate = true; |
5a15f56f | 2752 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
68b00778 L |
2753 | |
2754 | if (htab->params->report_relative_reloc) | |
2755 | _bfd_x86_elf_link_report_relative_reloc | |
2756 | (info, input_section, h, sym, "R_386_RELATIVE", | |
2757 | &outrel); | |
252b5132 RH |
2758 | } |
2759 | ||
cbe950e9 | 2760 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 2761 | |
62d78908 L |
2762 | if (sreloc == NULL || sreloc->contents == NULL) |
2763 | { | |
2764 | r = bfd_reloc_notsupported; | |
2765 | goto check_relocation_error; | |
2766 | } | |
0c715baa | 2767 | |
59d6ffb2 | 2768 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
2769 | |
2770 | /* If this reloc is against an external symbol, we do | |
2771 | not want to fiddle with the addend. Otherwise, we | |
2772 | need to include the symbol value so that it becomes | |
2773 | an addend for the dynamic reloc. */ | |
0f88be7a | 2774 | if (! relocate) |
252b5132 RH |
2775 | continue; |
2776 | } | |
252b5132 RH |
2777 | break; |
2778 | ||
37e55690 | 2779 | case R_386_TLS_IE: |
0e1862bb | 2780 | if (!bfd_link_executable (info)) |
37e55690 | 2781 | { |
947216bf | 2782 | Elf_Internal_Rela outrel; |
37e55690 | 2783 | asection *sreloc; |
37e55690 JJ |
2784 | |
2785 | outrel.r_offset = rel->r_offset | |
2786 | + input_section->output_section->vma | |
2787 | + input_section->output_offset; | |
2788 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
68b00778 L |
2789 | |
2790 | if (htab->params->report_relative_reloc) | |
2791 | _bfd_x86_elf_link_report_relative_reloc | |
2792 | (info, input_section, h, sym, "R_386_RELATIVE", | |
2793 | &outrel); | |
2794 | ||
37e55690 JJ |
2795 | sreloc = elf_section_data (input_section)->sreloc; |
2796 | if (sreloc == NULL) | |
2797 | abort (); | |
59d6ffb2 | 2798 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
2799 | } |
2800 | /* Fall through */ | |
2801 | ||
13ae64f3 | 2802 | case R_386_TLS_GD: |
67a4f2b7 AO |
2803 | case R_386_TLS_GOTDESC: |
2804 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 2805 | case R_386_TLS_IE_32: |
37e55690 | 2806 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
2807 | tls_type = GOT_UNKNOWN; |
2808 | if (h == NULL && local_got_offsets) | |
0afcef53 | 2809 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
13ae64f3 | 2810 | else if (h != NULL) |
0afcef53 | 2811 | tls_type = elf_x86_hash_entry(h)->tls_type; |
37e55690 JJ |
2812 | if (tls_type == GOT_TLS_IE) |
2813 | tls_type = GOT_TLS_IE_NEG; | |
142411ca | 2814 | |
419414ea | 2815 | r_type_tls = r_type; |
142411ca L |
2816 | if (! elf_i386_tls_transition (info, input_bfd, |
2817 | input_section, contents, | |
2818 | symtab_hdr, sym_hashes, | |
419414ea | 2819 | &r_type_tls, tls_type, rel, |
0a1b45a2 AM |
2820 | relend, h, r_symndx, true)) |
2821 | return false; | |
13ae64f3 | 2822 | |
419414ea | 2823 | if (r_type_tls == R_386_TLS_LE_32) |
13ae64f3 | 2824 | { |
82e51918 | 2825 | BFD_ASSERT (! unresolved_reloc); |
419414ea | 2826 | if (r_type == R_386_TLS_GD) |
13ae64f3 | 2827 | { |
142411ca | 2828 | unsigned int type; |
13ae64f3 JJ |
2829 | bfd_vma roff; |
2830 | ||
2831 | /* GD->LE transition. */ | |
6eaa7fb5 | 2832 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
2833 | if (type == 0x04) |
2834 | { | |
6eaa7fb5 L |
2835 | /* Change |
2836 | leal foo@tlsgd(,%ebx,1), %eax | |
2837 | call ___tls_get_addr@PLT | |
2838 | into: | |
2839 | movl %gs:0, %eax | |
2840 | subl $foo@tpoff, %eax | |
13ae64f3 | 2841 | (6 byte form of subl). */ |
142411ca | 2842 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
2843 | } |
2844 | else | |
2845 | { | |
6eaa7fb5 L |
2846 | /* Change |
2847 | leal foo@tlsgd(%ebx), %eax | |
2848 | call ___tls_get_addr@PLT | |
2849 | nop | |
2850 | or | |
2851 | leal foo@tlsgd(%reg), %eax | |
2852 | call *___tls_get_addr@GOT(%reg) | |
2853 | which may be converted to | |
2854 | addr32 call ___tls_get_addr | |
2855 | into: | |
2856 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 2857 | (6 byte form of subl). */ |
142411ca | 2858 | roff = rel->r_offset + 6; |
13ae64f3 | 2859 | } |
6eaa7fb5 L |
2860 | memcpy (contents + roff - 8, |
2861 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 2862 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 2863 | contents + roff); |
6eaa7fb5 | 2864 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 2865 | rel++; |
60f2e42e | 2866 | wrel++; |
13ae64f3 JJ |
2867 | continue; |
2868 | } | |
419414ea | 2869 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
2870 | { |
2871 | /* GDesc -> LE transition. | |
2872 | It's originally something like: | |
2873 | leal x@tlsdesc(%ebx), %eax | |
2874 | ||
2875 | leal x@ntpoff, %eax | |
2876 | ||
2877 | Registers other than %eax may be set up here. */ | |
2878 | ||
142411ca | 2879 | unsigned int val; |
67a4f2b7 AO |
2880 | bfd_vma roff; |
2881 | ||
67a4f2b7 | 2882 | roff = rel->r_offset; |
67a4f2b7 | 2883 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
2884 | |
2885 | /* Now modify the instruction as appropriate. */ | |
2886 | /* aoliva FIXME: remove the above and xor the byte | |
2887 | below with 0x86. */ | |
2888 | bfd_put_8 (output_bfd, val ^ 0x86, | |
2889 | contents + roff - 1); | |
eb4ff4d6 | 2890 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
2891 | contents + roff); |
2892 | continue; | |
2893 | } | |
419414ea | 2894 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
2895 | { |
2896 | /* GDesc -> LE transition. | |
2897 | It's originally: | |
2898 | call *(%eax) | |
2899 | Turn it into: | |
142411ca | 2900 | xchg %ax,%ax */ |
67a4f2b7 | 2901 | |
67a4f2b7 | 2902 | bfd_vma roff; |
6bbec505 | 2903 | |
67a4f2b7 | 2904 | roff = rel->r_offset; |
10efb593 | 2905 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
2906 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2907 | continue; | |
2908 | } | |
419414ea | 2909 | else if (r_type == R_386_TLS_IE) |
13ae64f3 | 2910 | { |
142411ca | 2911 | unsigned int val; |
13ae64f3 JJ |
2912 | |
2913 | /* IE->LE transition: | |
37e55690 JJ |
2914 | Originally it can be one of: |
2915 | movl foo, %eax | |
2916 | movl foo, %reg | |
2917 | addl foo, %reg | |
2918 | We change it into: | |
2919 | movl $foo, %eax | |
2920 | movl $foo, %reg | |
2921 | addl $foo, %reg. */ | |
37e55690 | 2922 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
2923 | if (val == 0xa1) |
2924 | { | |
2925 | /* movl foo, %eax. */ | |
55fd94b0 AM |
2926 | bfd_put_8 (output_bfd, 0xb8, |
2927 | contents + rel->r_offset - 1); | |
37e55690 | 2928 | } |
299bf759 | 2929 | else |
37e55690 | 2930 | { |
142411ca L |
2931 | unsigned int type; |
2932 | ||
55fd94b0 AM |
2933 | type = bfd_get_8 (input_bfd, |
2934 | contents + rel->r_offset - 2); | |
299bf759 | 2935 | switch (type) |
26e41594 | 2936 | { |
299bf759 L |
2937 | case 0x8b: |
2938 | /* movl */ | |
299bf759 L |
2939 | bfd_put_8 (output_bfd, 0xc7, |
2940 | contents + rel->r_offset - 2); | |
2941 | bfd_put_8 (output_bfd, | |
2942 | 0xc0 | ((val >> 3) & 7), | |
2943 | contents + rel->r_offset - 1); | |
2944 | break; | |
2945 | case 0x03: | |
2946 | /* addl */ | |
299bf759 L |
2947 | bfd_put_8 (output_bfd, 0x81, |
2948 | contents + rel->r_offset - 2); | |
2949 | bfd_put_8 (output_bfd, | |
2950 | 0xc0 | ((val >> 3) & 7), | |
2951 | contents + rel->r_offset - 1); | |
2952 | break; | |
2953 | default: | |
2954 | BFD_FAIL (); | |
2955 | break; | |
26e41594 | 2956 | } |
37e55690 | 2957 | } |
eb4ff4d6 | 2958 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
2959 | contents + rel->r_offset); |
2960 | continue; | |
2961 | } | |
2962 | else | |
2963 | { | |
2964 | unsigned int val, type; | |
2965 | ||
2966 | /* {IE_32,GOTIE}->LE transition: | |
2967 | Originally it can be one of: | |
13ae64f3 | 2968 | subl foo(%reg1), %reg2 |
13ae64f3 | 2969 | movl foo(%reg1), %reg2 |
37e55690 | 2970 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
2971 | We change it into: |
2972 | subl $foo, %reg2 | |
37e55690 JJ |
2973 | movl $foo, %reg2 (6 byte form) |
2974 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
2975 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
2976 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
2977 | if (type == 0x8b) |
2978 | { | |
2979 | /* movl */ | |
13ae64f3 JJ |
2980 | bfd_put_8 (output_bfd, 0xc7, |
2981 | contents + rel->r_offset - 2); | |
2982 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2983 | contents + rel->r_offset - 1); | |
2984 | } | |
2985 | else if (type == 0x2b) | |
2986 | { | |
2987 | /* subl */ | |
13ae64f3 JJ |
2988 | bfd_put_8 (output_bfd, 0x81, |
2989 | contents + rel->r_offset - 2); | |
2990 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
2991 | contents + rel->r_offset - 1); | |
2992 | } | |
37e55690 JJ |
2993 | else if (type == 0x03) |
2994 | { | |
2995 | /* addl */ | |
2996 | bfd_put_8 (output_bfd, 0x81, | |
2997 | contents + rel->r_offset - 2); | |
2998 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2999 | contents + rel->r_offset - 1); | |
3000 | } | |
13ae64f3 JJ |
3001 | else |
3002 | BFD_FAIL (); | |
419414ea | 3003 | if (r_type == R_386_TLS_GOTIE) |
eb4ff4d6 | 3004 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3005 | contents + rel->r_offset); |
3006 | else | |
eb4ff4d6 | 3007 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 3008 | contents + rel->r_offset); |
13ae64f3 JJ |
3009 | continue; |
3010 | } | |
3011 | } | |
3012 | ||
6de2ae4a | 3013 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3014 | abort (); |
3015 | ||
3016 | if (h != NULL) | |
67a4f2b7 AO |
3017 | { |
3018 | off = h->got.offset; | |
0afcef53 | 3019 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3020 | } |
13ae64f3 JJ |
3021 | else |
3022 | { | |
3023 | if (local_got_offsets == NULL) | |
3024 | abort (); | |
3025 | ||
3026 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3027 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3028 | } |
3029 | ||
3030 | if ((off & 1) != 0) | |
3031 | off &= ~1; | |
26e41594 | 3032 | else |
13ae64f3 | 3033 | { |
947216bf | 3034 | Elf_Internal_Rela outrel; |
91d6fa6a | 3035 | int dr_type; |
67a4f2b7 | 3036 | asection *sreloc; |
13ae64f3 | 3037 | |
6de2ae4a | 3038 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3039 | abort (); |
3040 | ||
67a4f2b7 AO |
3041 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3042 | ||
3043 | if (GOT_TLS_GDESC_P (tls_type)) | |
3044 | { | |
59d6ffb2 | 3045 | bfd_byte *loc; |
67a4f2b7 AO |
3046 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
3047 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
3048 | <= htab->elf.sgotplt->size); |
3049 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3050 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3051 | + offplt |
3052 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3053 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3054 | loc = sreloc->contents; |
765e526c | 3055 | loc += (htab->next_tls_desc_index++ |
5ae0bfb6 | 3056 | * sizeof (Elf32_External_Rel)); |
67a4f2b7 | 3057 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 3058 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
3059 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3060 | if (indx == 0) | |
3061 | { | |
3062 | BFD_ASSERT (! unresolved_reloc); | |
3063 | bfd_put_32 (output_bfd, | |
0afcef53 | 3064 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3065 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3066 | + htab->sgotplt_jump_table_size + 4); |
3067 | } | |
3068 | else | |
3069 | { | |
3070 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3071 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3072 | + htab->sgotplt_jump_table_size + 4); |
3073 | } | |
3074 | } | |
3075 | ||
6de2ae4a | 3076 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3077 | |
6de2ae4a L |
3078 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3079 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 3080 | |
67a4f2b7 | 3081 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 3082 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
3083 | else if (GOT_TLS_GDESC_P (tls_type)) |
3084 | goto dr_done; | |
37e55690 JJ |
3085 | else if (tls_type == GOT_TLS_IE_POS) |
3086 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
3087 | else |
3088 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 3089 | |
37e55690 | 3090 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 | 3091 | bfd_put_32 (output_bfd, |
0afcef53 | 3092 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3093 | htab->elf.sgot->contents + off); |
37e55690 | 3094 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 3095 | bfd_put_32 (output_bfd, |
0afcef53 | 3096 | _bfd_x86_elf_dtpoff_base (info) - relocation, |
6de2ae4a | 3097 | htab->elf.sgot->contents + off); |
67a4f2b7 | 3098 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 3099 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3100 | htab->elf.sgot->contents + off); |
13ae64f3 | 3101 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 3102 | |
59d6ffb2 | 3103 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 3104 | |
67a4f2b7 | 3105 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3106 | { |
3107 | if (indx == 0) | |
3108 | { | |
07d6d2b8 | 3109 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 3110 | bfd_put_32 (output_bfd, |
0afcef53 | 3111 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3112 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3113 | } |
3114 | else | |
3115 | { | |
3116 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3117 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3118 | outrel.r_info = ELF32_R_INFO (indx, |
3119 | R_386_TLS_DTPOFF32); | |
3120 | outrel.r_offset += 4; | |
59d6ffb2 | 3121 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
3122 | } |
3123 | } | |
37e55690 JJ |
3124 | else if (tls_type == GOT_TLS_IE_BOTH) |
3125 | { | |
3126 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 3127 | (indx == 0 |
0afcef53 | 3128 | ? relocation - _bfd_x86_elf_dtpoff_base (info) |
eb4ff4d6 | 3129 | : 0), |
6de2ae4a | 3130 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
3131 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
3132 | outrel.r_offset += 4; | |
59d6ffb2 | 3133 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 3134 | } |
13ae64f3 | 3135 | |
67a4f2b7 | 3136 | dr_done: |
13ae64f3 JJ |
3137 | if (h != NULL) |
3138 | h->got.offset |= 1; | |
3139 | else | |
3140 | local_got_offsets[r_symndx] |= 1; | |
3141 | } | |
3142 | ||
67a4f2b7 AO |
3143 | if (off >= (bfd_vma) -2 |
3144 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3145 | abort (); |
419414ea L |
3146 | if (r_type_tls == R_386_TLS_GOTDESC |
3147 | || r_type_tls == R_386_TLS_DESC_CALL) | |
67a4f2b7 AO |
3148 | { |
3149 | relocation = htab->sgotplt_jump_table_size + offplt; | |
0a1b45a2 | 3150 | unresolved_reloc = false; |
67a4f2b7 | 3151 | } |
419414ea | 3152 | else if (r_type_tls == r_type) |
13ae64f3 | 3153 | { |
6de2ae4a L |
3154 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
3155 | + htab->elf.sgotplt->output_offset; | |
3156 | relocation = htab->elf.sgot->output_section->vma | |
3157 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
3158 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3159 | && tls_type == GOT_TLS_IE_BOTH) | |
3160 | relocation += 4; | |
3161 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3162 | relocation += g_o_t; |
0a1b45a2 | 3163 | unresolved_reloc = false; |
13ae64f3 | 3164 | } |
419414ea | 3165 | else if (r_type == R_386_TLS_GD) |
13ae64f3 JJ |
3166 | { |
3167 | unsigned int val, type; | |
3168 | bfd_vma roff; | |
3169 | ||
3170 | /* GD->IE transition. */ | |
6eaa7fb5 L |
3171 | type = *(contents + rel->r_offset - 2); |
3172 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3173 | if (type == 0x04) |
3174 | { | |
6eaa7fb5 L |
3175 | /* Change |
3176 | leal foo@tlsgd(,%ebx,1), %eax | |
3177 | call ___tls_get_addr@PLT | |
3178 | into: | |
3179 | movl %gs:0, %eax | |
3180 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 3181 | val >>= 3; |
142411ca | 3182 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
3183 | } |
3184 | else | |
3185 | { | |
6eaa7fb5 L |
3186 | /* Change |
3187 | leal foo@tlsgd(%ebx), %eax | |
3188 | call ___tls_get_addr@PLT | |
3189 | nop | |
3190 | or | |
3191 | leal foo@tlsgd(%reg), %eax | |
3192 | call *___tls_get_addr@GOT(%reg) | |
3193 | which may be converted to | |
3194 | addr32 call ___tls_get_addr | |
3195 | into: | |
3196 | movl %gs:0, %eax; | |
3197 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
3198 | roff = rel->r_offset - 2; |
3199 | } | |
3200 | memcpy (contents + roff, | |
3201 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3202 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3203 | /* If foo is used only with foo@gotntpoff(%reg) and |
3204 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3205 | subl $foo@gottpoff(%reg), %eax | |
3206 | into: | |
3207 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3208 | if (tls_type == GOT_TLS_IE_POS) |
3209 | contents[roff + 6] = 0x03; | |
8c37241b | 3210 | bfd_put_32 (output_bfd, |
6de2ae4a L |
3211 | htab->elf.sgot->output_section->vma |
3212 | + htab->elf.sgot->output_offset + off | |
3213 | - htab->elf.sgotplt->output_section->vma | |
3214 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 3215 | contents + roff + 8); |
6eaa7fb5 | 3216 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 3217 | rel++; |
60f2e42e | 3218 | wrel++; |
13ae64f3 JJ |
3219 | continue; |
3220 | } | |
419414ea | 3221 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
3222 | { |
3223 | /* GDesc -> IE transition. | |
3224 | It's originally something like: | |
3225 | leal x@tlsdesc(%ebx), %eax | |
3226 | ||
3227 | Change it to: | |
142411ca | 3228 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
3229 | or: |
3230 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3231 | ||
3232 | Registers other than %eax may be set up here. */ | |
3233 | ||
67a4f2b7 AO |
3234 | bfd_vma roff; |
3235 | ||
3236 | /* First, make sure it's a leal adding ebx to a 32-bit | |
3237 | offset into any register, although it's probably | |
3238 | almost always going to be eax. */ | |
3239 | roff = rel->r_offset; | |
67a4f2b7 AO |
3240 | |
3241 | /* Now modify the instruction as appropriate. */ | |
3242 | /* To turn a leal into a movl in the form we use it, it | |
3243 | suffices to change the first byte from 0x8d to 0x8b. | |
3244 | aoliva FIXME: should we decide to keep the leal, all | |
3245 | we have to do is remove the statement below, and | |
3246 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
3247 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3248 | ||
3249 | if (tls_type == GOT_TLS_IE_BOTH) | |
3250 | off += 4; | |
3251 | ||
3252 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3253 | htab->elf.sgot->output_section->vma |
3254 | + htab->elf.sgot->output_offset + off | |
3255 | - htab->elf.sgotplt->output_section->vma | |
3256 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
3257 | contents + roff); |
3258 | continue; | |
3259 | } | |
419414ea | 3260 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
3261 | { |
3262 | /* GDesc -> IE transition. | |
3263 | It's originally: | |
3264 | call *(%eax) | |
3265 | ||
3266 | Change it to: | |
142411ca | 3267 | xchg %ax,%ax |
67a4f2b7 AO |
3268 | or |
3269 | negl %eax | |
3270 | depending on how we transformed the TLS_GOTDESC above. | |
3271 | */ | |
3272 | ||
67a4f2b7 AO |
3273 | bfd_vma roff; |
3274 | ||
67a4f2b7 | 3275 | roff = rel->r_offset; |
67a4f2b7 AO |
3276 | |
3277 | /* Now modify the instruction as appropriate. */ | |
3278 | if (tls_type != GOT_TLS_IE_NEG) | |
3279 | { | |
10efb593 L |
3280 | /* xchg %ax,%ax */ |
3281 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
3282 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3283 | } | |
3284 | else | |
3285 | { | |
3286 | /* negl %eax */ | |
3287 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
3288 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
3289 | } | |
3290 | ||
3291 | continue; | |
3292 | } | |
3293 | else | |
0a1b45a2 | 3294 | BFD_ASSERT (false); |
13ae64f3 JJ |
3295 | break; |
3296 | ||
3297 | case R_386_TLS_LDM: | |
142411ca L |
3298 | if (! elf_i386_tls_transition (info, input_bfd, |
3299 | input_section, contents, | |
3300 | symtab_hdr, sym_hashes, | |
3301 | &r_type, GOT_UNKNOWN, rel, | |
0a1b45a2 AM |
3302 | relend, h, r_symndx, true)) |
3303 | return false; | |
13ae64f3 | 3304 | |
142411ca L |
3305 | if (r_type != R_386_TLS_LDM) |
3306 | { | |
6eaa7fb5 L |
3307 | /* LD->LE transition. Change |
3308 | leal foo@tlsldm(%ebx) %eax | |
3309 | call ___tls_get_addr@PLT | |
3310 | into: | |
3311 | movl %gs:0, %eax | |
3312 | nop | |
3313 | leal 0(%esi,1), %esi | |
3314 | or change | |
3315 | leal foo@tlsldm(%reg) %eax | |
3316 | call *___tls_get_addr@GOT(%reg) | |
3317 | which may be converted to | |
3318 | addr32 call ___tls_get_addr | |
3319 | into: | |
3320 | movl %gs:0, %eax | |
3321 | leal 0(%esi), %esi */ | |
142411ca | 3322 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
3323 | if (*(contents + rel->r_offset + 4) == 0xff |
3324 | || *(contents + rel->r_offset + 4) == 0x67) | |
3325 | memcpy (contents + rel->r_offset - 2, | |
3326 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
3327 | else | |
3328 | memcpy (contents + rel->r_offset - 2, | |
3329 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 3330 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 3331 | rel++; |
60f2e42e | 3332 | wrel++; |
13ae64f3 JJ |
3333 | continue; |
3334 | } | |
3335 | ||
6de2ae4a | 3336 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3337 | abort (); |
3338 | ||
0afcef53 | 3339 | off = htab->tls_ld_or_ldm_got.offset; |
13ae64f3 JJ |
3340 | if (off & 1) |
3341 | off &= ~1; | |
3342 | else | |
3343 | { | |
947216bf | 3344 | Elf_Internal_Rela outrel; |
13ae64f3 | 3345 | |
6de2ae4a | 3346 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3347 | abort (); |
3348 | ||
6de2ae4a L |
3349 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3350 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
3351 | |
3352 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3353 | htab->elf.sgot->contents + off); |
13ae64f3 | 3354 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3355 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 3356 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 3357 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
0afcef53 | 3358 | htab->tls_ld_or_ldm_got.offset |= 1; |
13ae64f3 | 3359 | } |
6de2ae4a L |
3360 | relocation = htab->elf.sgot->output_section->vma |
3361 | + htab->elf.sgot->output_offset + off | |
3362 | - htab->elf.sgotplt->output_section->vma | |
3363 | - htab->elf.sgotplt->output_offset; | |
0a1b45a2 | 3364 | unresolved_reloc = false; |
13ae64f3 JJ |
3365 | break; |
3366 | ||
3367 | case R_386_TLS_LDO_32: | |
0e1862bb L |
3368 | if (!bfd_link_executable (info) |
3369 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3370 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
13ae64f3 JJ |
3371 | else |
3372 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 3373 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3374 | break; |
3375 | ||
3376 | case R_386_TLS_LE_32: | |
13ae64f3 | 3377 | case R_386_TLS_LE: |
0e1862bb | 3378 | if (!bfd_link_executable (info)) |
37e55690 | 3379 | { |
947216bf | 3380 | Elf_Internal_Rela outrel; |
37e55690 | 3381 | asection *sreloc; |
37e55690 JJ |
3382 | |
3383 | outrel.r_offset = rel->r_offset | |
3384 | + input_section->output_section->vma | |
3385 | + input_section->output_offset; | |
3386 | if (h != NULL && h->dynindx != -1) | |
3387 | indx = h->dynindx; | |
3388 | else | |
3389 | indx = 0; | |
3390 | if (r_type == R_386_TLS_LE_32) | |
3391 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
3392 | else | |
3393 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3394 | sreloc = elf_section_data (input_section)->sreloc; | |
3395 | if (sreloc == NULL) | |
3396 | abort (); | |
59d6ffb2 | 3397 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3398 | if (indx) |
3399 | continue; | |
3400 | else if (r_type == R_386_TLS_LE_32) | |
0afcef53 | 3401 | relocation = _bfd_x86_elf_dtpoff_base (info) - relocation; |
37e55690 | 3402 | else |
0afcef53 | 3403 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
37e55690 JJ |
3404 | } |
3405 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 3406 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 3407 | else |
eb4ff4d6 | 3408 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3409 | break; |
3410 | ||
252b5132 RH |
3411 | default: |
3412 | break; | |
3413 | } | |
3414 | ||
239e1f3a AM |
3415 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3416 | because such sections are not SEC_ALLOC and thus ld.so will | |
3417 | not process them. */ | |
8c694914 | 3418 | if (unresolved_reloc |
239e1f3a | 3419 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3420 | && h->def_dynamic) |
3421 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3422 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 3423 | { |
4eca0228 | 3424 | _bfd_error_handler |
695344c0 | 3425 | /* xgettext:c-format */ |
2dcf00ce | 3426 | (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3427 | input_bfd, |
3428 | input_section, | |
2dcf00ce | 3429 | (uint64_t) rel->r_offset, |
843fe662 | 3430 | howto->name, |
6a30718d | 3431 | h->root.root.string); |
0a1b45a2 | 3432 | return false; |
6a30718d | 3433 | } |
83be169b | 3434 | |
dc1e8a47 | 3435 | do_relocation: |
252b5132 RH |
3436 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
3437 | contents, rel->r_offset, | |
55fd94b0 | 3438 | relocation, 0); |
252b5132 | 3439 | |
dc1e8a47 | 3440 | check_relocation_error: |
cf5c0c5b | 3441 | if (r != bfd_reloc_ok) |
252b5132 | 3442 | { |
cf5c0c5b | 3443 | const char *name; |
ffb2e45b | 3444 | |
cf5c0c5b AM |
3445 | if (h != NULL) |
3446 | name = h->root.root.string; | |
3447 | else | |
3448 | { | |
3449 | name = bfd_elf_string_from_elf_section (input_bfd, | |
3450 | symtab_hdr->sh_link, | |
3451 | sym->st_name); | |
3452 | if (name == NULL) | |
0a1b45a2 | 3453 | return false; |
cf5c0c5b | 3454 | if (*name == '\0') |
fd361982 | 3455 | name = bfd_section_name (sec); |
cf5c0c5b | 3456 | } |
ffb2e45b | 3457 | |
cf5c0c5b | 3458 | if (r == bfd_reloc_overflow) |
1a72702b AM |
3459 | (*info->callbacks->reloc_overflow) |
3460 | (info, (h ? &h->root : NULL), name, howto->name, | |
3461 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
3462 | else |
3463 | { | |
4eca0228 | 3464 | _bfd_error_handler |
695344c0 | 3465 | /* xgettext:c-format */ |
2dcf00ce | 3466 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 3467 | input_bfd, input_section, |
2dcf00ce | 3468 | (uint64_t) rel->r_offset, name, (int) r); |
0a1b45a2 | 3469 | return false; |
cf5c0c5b | 3470 | } |
252b5132 | 3471 | } |
60f2e42e L |
3472 | |
3473 | if (wrel != rel) | |
3474 | *wrel = *rel; | |
3475 | } | |
3476 | ||
3477 | if (wrel != rel) | |
3478 | { | |
3479 | Elf_Internal_Shdr *rel_hdr; | |
3480 | size_t deleted = rel - wrel; | |
3481 | ||
3482 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3483 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3484 | if (rel_hdr->sh_size == 0) | |
3485 | { | |
3486 | /* It is too late to remove an empty reloc section. Leave | |
3487 | one NONE reloc. | |
3488 | ??? What is wrong with an empty section??? */ | |
3489 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3490 | deleted -= 1; | |
3491 | } | |
3492 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3493 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3494 | input_section->reloc_count -= deleted; | |
252b5132 RH |
3495 | } |
3496 | ||
0a1b45a2 | 3497 | return true; |
252b5132 RH |
3498 | } |
3499 | ||
3500 | /* Finish up dynamic symbol handling. We set the contents of various | |
3501 | dynamic sections here. */ | |
3502 | ||
0a1b45a2 | 3503 | static bool |
55fd94b0 AM |
3504 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
3505 | struct bfd_link_info *info, | |
3506 | struct elf_link_hash_entry *h, | |
3507 | Elf_Internal_Sym *sym) | |
252b5132 | 3508 | { |
0afcef53 | 3509 | struct elf_x86_link_hash_table *htab; |
25e762b9 | 3510 | unsigned plt_entry_size; |
0afcef53 | 3511 | struct elf_x86_link_hash_entry *eh; |
0a1b45a2 AM |
3512 | bool local_undefweak; |
3513 | bool use_plt_second; | |
252b5132 | 3514 | |
0afcef53 | 3515 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 3516 | if (htab == NULL) |
0a1b45a2 | 3517 | return false; |
252b5132 | 3518 | |
765e526c | 3519 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3520 | |
ee2fdd6f L |
3521 | /* Use the second PLT section only if there is .plt section. */ |
3522 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
3523 | ||
0afcef53 | 3524 | eh = (struct elf_x86_link_hash_entry *) h; |
e133d005 L |
3525 | if (eh->no_finish_dynamic_symbol) |
3526 | abort (); | |
dd7e64d4 | 3527 | |
aec6b87e L |
3528 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3529 | resolved undefined weak symbols in executable so that their | |
3530 | references have value 0 at run-time. */ | |
c5bce5c6 | 3531 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3532 | |
252b5132 RH |
3533 | if (h->plt.offset != (bfd_vma) -1) |
3534 | { | |
ee2fdd6f | 3535 | bfd_vma plt_index, plt_offset; |
252b5132 | 3536 | bfd_vma got_offset; |
947216bf AM |
3537 | Elf_Internal_Rela rel; |
3538 | bfd_byte *loc; | |
ee2fdd6f | 3539 | asection *plt, *resolved_plt, *gotplt, *relplt; |
cbe950e9 L |
3540 | |
3541 | /* When building a static executable, use .iplt, .igot.plt and | |
3542 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3543 | if (htab->elf.splt != NULL) |
cbe950e9 | 3544 | { |
6de2ae4a L |
3545 | plt = htab->elf.splt; |
3546 | gotplt = htab->elf.sgotplt; | |
3547 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3548 | } |
3549 | else | |
3550 | { | |
6de2ae4a L |
3551 | plt = htab->elf.iplt; |
3552 | gotplt = htab->elf.igotplt; | |
3553 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3554 | } |
252b5132 | 3555 | |
f3180fa9 | 3556 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
252b5132 RH |
3557 | |
3558 | /* Get the index in the procedure linkage table which | |
3559 | corresponds to this symbol. This is the index of this symbol | |
3560 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3561 | first entry in the procedure linkage table is reserved. |
252b5132 | 3562 | |
cbe950e9 | 3563 | Get the offset into the .got table of the entry that |
252b5132 | 3564 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 3565 | The first three are reserved. |
6bbec505 | 3566 | |
cbe950e9 L |
3567 | For static executables, we don't reserve anything. */ |
3568 | ||
6de2ae4a | 3569 | if (plt == htab->elf.splt) |
cbe950e9 | 3570 | { |
f604c2a2 | 3571 | got_offset = (h->plt.offset / plt_entry_size |
765e526c | 3572 | - htab->plt.has_plt0); |
e1f98742 | 3573 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
3574 | } |
3575 | else | |
3576 | { | |
e1f98742 L |
3577 | got_offset = h->plt.offset / plt_entry_size; |
3578 | got_offset = got_offset * 4; | |
cbe950e9 | 3579 | } |
252b5132 | 3580 | |
f604c2a2 L |
3581 | /* Fill in the entry in the procedure linkage table and update |
3582 | the first slot. */ | |
765e526c | 3583 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
f604c2a2 | 3584 | plt_entry_size); |
ee2fdd6f L |
3585 | |
3586 | if (use_plt_second) | |
3587 | { | |
3588 | const bfd_byte *plt_entry; | |
3589 | if (bfd_link_pic (info)) | |
765e526c | 3590 | plt_entry = htab->non_lazy_plt->pic_plt_entry; |
ee2fdd6f | 3591 | else |
765e526c | 3592 | plt_entry = htab->non_lazy_plt->plt_entry; |
ee2fdd6f | 3593 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c | 3594 | plt_entry, htab->non_lazy_plt->plt_entry_size); |
ee2fdd6f L |
3595 | |
3596 | resolved_plt = htab->plt_second; | |
3597 | plt_offset = eh->plt_second.offset; | |
3598 | } | |
3599 | else | |
3600 | { | |
3601 | resolved_plt = plt; | |
3602 | plt_offset = h->plt.offset; | |
3603 | } | |
3604 | ||
0e1862bb | 3605 | if (! bfd_link_pic (info)) |
252b5132 | 3606 | { |
252b5132 | 3607 | bfd_put_32 (output_bfd, |
cbe950e9 L |
3608 | (gotplt->output_section->vma |
3609 | + gotplt->output_offset | |
252b5132 | 3610 | + got_offset), |
ee2fdd6f | 3611 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3612 | + htab->plt.plt_got_offset); |
eac338cf | 3613 | |
90c14f0c | 3614 | if (htab->elf.target_os == is_vxworks) |
eac338cf PB |
3615 | { |
3616 | int s, k, reloc_index; | |
3617 | ||
3618 | /* Create the R_386_32 relocation referencing the GOT | |
3619 | for this PLT entry. */ | |
3620 | ||
3621 | /* S: Current slot number (zero-based). */ | |
765e526c | 3622 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
07d6d2b8 | 3623 | / htab->plt.plt_entry_size); |
eac338cf | 3624 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 3625 | if (bfd_link_pic (info)) |
eac338cf PB |
3626 | k = PLTRESOLVE_RELOCS_SHLIB; |
3627 | else | |
3628 | k = PLTRESOLVE_RELOCS; | |
3629 | /* Skip the PLTresolve relocations, and the relocations for | |
3630 | the other PLT slots. */ | |
3631 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
765e526c | 3632 | loc = (htab->srelplt2->contents + reloc_index |
eac338cf PB |
3633 | * sizeof (Elf32_External_Rel)); |
3634 | ||
ee2fdd6f L |
3635 | rel.r_offset = (plt->output_section->vma |
3636 | + plt->output_offset | |
eac338cf | 3637 | + h->plt.offset + 2), |
7325306f | 3638 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3639 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
3640 | ||
3641 | /* Create the R_386_32 relocation referencing the beginning of | |
3642 | the PLT for this GOT entry. */ | |
6de2ae4a L |
3643 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
3644 | + htab->elf.sgotplt->output_offset | |
eac338cf | 3645 | + got_offset); |
7325306f | 3646 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 3647 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 3648 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 3649 | } |
252b5132 RH |
3650 | } |
3651 | else | |
3652 | { | |
252b5132 | 3653 | bfd_put_32 (output_bfd, got_offset, |
ee2fdd6f | 3654 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3655 | + htab->plt.plt_got_offset); |
252b5132 RH |
3656 | } |
3657 | ||
aec6b87e L |
3658 | /* Fill in the entry in the global offset table. Leave the entry |
3659 | as zero for undefined weak symbol in PIE. No PLT relocation | |
3660 | against undefined weak symbol in PIE. */ | |
3661 | if (!local_undefweak) | |
cbe950e9 | 3662 | { |
765e526c | 3663 | if (htab->plt.has_plt0) |
f604c2a2 L |
3664 | bfd_put_32 (output_bfd, |
3665 | (plt->output_section->vma | |
3666 | + plt->output_offset | |
3667 | + h->plt.offset | |
765e526c | 3668 | + htab->lazy_plt->plt_lazy_offset), |
f604c2a2 | 3669 | gotplt->contents + got_offset); |
252b5132 | 3670 | |
aec6b87e L |
3671 | /* Fill in the entry in the .rel.plt section. */ |
3672 | rel.r_offset = (gotplt->output_section->vma | |
3673 | + gotplt->output_offset | |
3674 | + got_offset); | |
cf1070f1 | 3675 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 3676 | { |
871b3ab2 | 3677 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
3678 | h->root.root.string, |
3679 | h->root.u.def.section->owner); | |
3680 | ||
aec6b87e L |
3681 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
3682 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
3683 | in the .got.plt section. */ | |
3684 | bfd_put_32 (output_bfd, | |
3685 | (h->root.u.def.value | |
3686 | + h->root.u.def.section->output_section->vma | |
3687 | + h->root.u.def.section->output_offset), | |
3688 | gotplt->contents + got_offset); | |
3689 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
68b00778 L |
3690 | |
3691 | if (htab->params->report_relative_reloc) | |
3692 | _bfd_x86_elf_link_report_relative_reloc | |
3693 | (info, relplt, h, sym, "R_386_IRELATIVE", &rel); | |
3694 | ||
aec6b87e L |
3695 | /* R_386_IRELATIVE comes last. */ |
3696 | plt_index = htab->next_irelative_index--; | |
3697 | } | |
3698 | else | |
3699 | { | |
3700 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
3701 | plt_index = htab->next_jump_slot_index++; | |
3702 | } | |
3703 | ||
3704 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
3705 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
3706 | ||
f604c2a2 L |
3707 | /* Don't fill the second and third slots in PLT entry for |
3708 | static executables nor without PLT0. */ | |
765e526c | 3709 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e L |
3710 | { |
3711 | bfd_put_32 (output_bfd, | |
3712 | plt_index * sizeof (Elf32_External_Rel), | |
3713 | plt->contents + h->plt.offset | |
765e526c | 3714 | + htab->lazy_plt->plt_reloc_offset); |
f604c2a2 L |
3715 | bfd_put_32 (output_bfd, |
3716 | - (h->plt.offset | |
765e526c | 3717 | + htab->lazy_plt->plt_plt_offset + 4), |
f604c2a2 | 3718 | (plt->contents + h->plt.offset |
765e526c | 3719 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 3720 | } |
e1f98742 | 3721 | } |
dd7e64d4 L |
3722 | } |
3723 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
3724 | { | |
3725 | bfd_vma got_offset, plt_offset; | |
3726 | asection *plt, *got, *gotplt; | |
3727 | const bfd_byte *got_plt_entry; | |
3728 | ||
dd7e64d4 L |
3729 | /* Set the entry in the GOT procedure linkage table. */ |
3730 | plt = htab->plt_got; | |
3731 | got = htab->elf.sgot; | |
3732 | gotplt = htab->elf.sgotplt; | |
3733 | got_offset = h->got.offset; | |
3734 | ||
3735 | if (got_offset == (bfd_vma) -1 | |
3736 | || plt == NULL | |
3737 | || got == NULL | |
3738 | || gotplt == NULL) | |
3739 | abort (); | |
3740 | ||
3741 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 3742 | if (! bfd_link_pic (info)) |
252b5132 | 3743 | { |
765e526c | 3744 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 3745 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 3746 | } |
dd7e64d4 L |
3747 | else |
3748 | { | |
765e526c | 3749 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
3750 | got_offset += (got->output_section->vma |
3751 | + got->output_offset | |
3752 | - gotplt->output_section->vma | |
3753 | - gotplt->output_offset); | |
3754 | } | |
3755 | ||
3756 | plt_offset = eh->plt_got.offset; | |
3757 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
765e526c | 3758 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 3759 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 | 3760 | (plt->contents + plt_offset |
765e526c | 3761 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
3762 | } |
3763 | ||
aec6b87e L |
3764 | if (!local_undefweak |
3765 | && !h->def_regular | |
dd7e64d4 L |
3766 | && (h->plt.offset != (bfd_vma) -1 |
3767 | || eh->plt_got.offset != (bfd_vma) -1)) | |
3768 | { | |
3769 | /* Mark the symbol as undefined, rather than as defined in | |
3770 | the .plt section. Leave the value if there were any | |
3771 | relocations where pointer equality matters (this is a clue | |
3772 | for the dynamic linker, to make function pointer | |
3773 | comparisons work between an application and shared | |
3774 | library), otherwise set it to zero. If a function is only | |
3775 | called from a binary, there is no need to slow down | |
3776 | shared libraries because of that. */ | |
3777 | sym->st_shndx = SHN_UNDEF; | |
3778 | if (!h->pointer_equality_needed) | |
3779 | sym->st_value = 0; | |
252b5132 RH |
3780 | } |
3781 | ||
4ec09950 L |
3782 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
3783 | ||
aec6b87e L |
3784 | /* Don't generate dynamic GOT relocation against undefined weak |
3785 | symbol in executable. */ | |
13ae64f3 | 3786 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
3787 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type) |
3788 | && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 | |
aec6b87e | 3789 | && !local_undefweak) |
252b5132 | 3790 | { |
947216bf | 3791 | Elf_Internal_Rela rel; |
233cc9c1 | 3792 | asection *relgot = htab->elf.srelgot; |
68b00778 | 3793 | const char *relative_reloc_name = NULL; |
252b5132 RH |
3794 | |
3795 | /* This symbol has an entry in the global offset table. Set it | |
3796 | up. */ | |
3797 | ||
6de2ae4a | 3798 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 3799 | abort (); |
252b5132 | 3800 | |
6de2ae4a L |
3801 | rel.r_offset = (htab->elf.sgot->output_section->vma |
3802 | + htab->elf.sgot->output_offset | |
dc810e39 | 3803 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 3804 | |
dd5724d5 AM |
3805 | /* If this is a static link, or it is a -Bsymbolic link and the |
3806 | symbol is defined locally or was forced to be local because | |
3807 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
3808 | The entry in the global offset table will already have been |
3809 | initialized in the relocate_section function. */ | |
710ab287 | 3810 | if (h->def_regular |
0018b0a3 L |
3811 | && h->type == STT_GNU_IFUNC) |
3812 | { | |
233cc9c1 L |
3813 | if (h->plt.offset == (bfd_vma) -1) |
3814 | { | |
3815 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
3816 | if (htab->elf.splt == NULL) | |
3817 | { | |
3818 | /* use .rel[a].iplt section to store .got relocations | |
3819 | in static executable. */ | |
3820 | relgot = htab->elf.irelplt; | |
3821 | } | |
6999821f | 3822 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 3823 | { |
871b3ab2 | 3824 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
3825 | h->root.root.string, |
3826 | h->root.u.def.section->owner); | |
3827 | ||
233cc9c1 L |
3828 | bfd_put_32 (output_bfd, |
3829 | (h->root.u.def.value | |
3830 | + h->root.u.def.section->output_section->vma | |
3831 | + h->root.u.def.section->output_offset), | |
3832 | htab->elf.sgot->contents + h->got.offset); | |
3833 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
68b00778 | 3834 | relative_reloc_name = "R_386_IRELATIVE"; |
233cc9c1 L |
3835 | } |
3836 | else | |
3837 | goto do_glob_dat; | |
3838 | } | |
3839 | else if (bfd_link_pic (info)) | |
710ab287 L |
3840 | { |
3841 | /* Generate R_386_GLOB_DAT. */ | |
3842 | goto do_glob_dat; | |
3843 | } | |
3844 | else | |
3845 | { | |
cd2b2c10 | 3846 | asection *plt; |
ee2fdd6f | 3847 | bfd_vma plt_offset; |
cd2b2c10 | 3848 | |
710ab287 L |
3849 | if (!h->pointer_equality_needed) |
3850 | abort (); | |
3851 | ||
3852 | /* For non-shared object, we can't use .got.plt, which | |
3853 | contains the real function addres if we need pointer | |
3854 | equality. We load the GOT entry with the PLT entry. */ | |
ee2fdd6f L |
3855 | if (htab->plt_second != NULL) |
3856 | { | |
3857 | plt = htab->plt_second; | |
3858 | plt_offset = eh->plt_second.offset; | |
3859 | } | |
3860 | else | |
3861 | { | |
3862 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
3863 | plt_offset = h->plt.offset; | |
3864 | } | |
710ab287 L |
3865 | bfd_put_32 (output_bfd, |
3866 | (plt->output_section->vma | |
ee2fdd6f | 3867 | + plt->output_offset + plt_offset), |
6de2ae4a | 3868 | htab->elf.sgot->contents + h->got.offset); |
0a1b45a2 | 3869 | return true; |
710ab287 | 3870 | } |
0018b0a3 | 3871 | } |
0e1862bb | 3872 | else if (bfd_link_pic (info) |
6999821f | 3873 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
dd5724d5 | 3874 | { |
6725bdbf | 3875 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 | 3876 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
68b00778 | 3877 | relative_reloc_name = "R_386_RELATIVE"; |
dd5724d5 | 3878 | } |
252b5132 RH |
3879 | else |
3880 | { | |
dd5724d5 | 3881 | BFD_ASSERT((h->got.offset & 1) == 0); |
dc1e8a47 | 3882 | do_glob_dat: |
6725bdbf | 3883 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3884 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
3885 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
3886 | } | |
3887 | ||
68b00778 L |
3888 | if (relative_reloc_name != NULL |
3889 | && htab->params->report_relative_reloc) | |
3890 | _bfd_x86_elf_link_report_relative_reloc | |
3891 | (info, relgot, h, sym, relative_reloc_name, &rel); | |
3892 | ||
233cc9c1 | 3893 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
3894 | } |
3895 | ||
f5385ebf | 3896 | if (h->needs_copy) |
252b5132 | 3897 | { |
947216bf | 3898 | Elf_Internal_Rela rel; |
5474d94f | 3899 | asection *s; |
252b5132 RH |
3900 | |
3901 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 3902 | VERIFY_COPY_RELOC (h, htab) |
252b5132 RH |
3903 | |
3904 | rel.r_offset = (h->root.u.def.value | |
3905 | + h->root.u.def.section->output_section->vma | |
3906 | + h->root.u.def.section->output_offset); | |
3907 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 3908 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
3909 | s = htab->elf.sreldynrelro; |
3910 | else | |
3911 | s = htab->elf.srelbss; | |
3912 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
3913 | } |
3914 | ||
0a1b45a2 | 3915 | return true; |
252b5132 RH |
3916 | } |
3917 | ||
c25bc9fc L |
3918 | /* Finish up local dynamic symbol handling. We set the contents of |
3919 | various dynamic sections here. */ | |
3920 | ||
1201fda6 | 3921 | static int |
c25bc9fc L |
3922 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) |
3923 | { | |
3924 | struct elf_link_hash_entry *h | |
3925 | = (struct elf_link_hash_entry *) *slot; | |
3926 | struct bfd_link_info *info | |
23209a78 | 3927 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
3928 | |
3929 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
3930 | h, NULL); | |
3931 | } | |
3932 | ||
aec6b87e L |
3933 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
3934 | here since undefined weak symbol may not be dynamic and may not be | |
3935 | called for elf_i386_finish_dynamic_symbol. */ | |
3936 | ||
0a1b45a2 | 3937 | static bool |
aec6b87e L |
3938 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, |
3939 | void *inf) | |
3940 | { | |
3941 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
3942 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3943 | ||
3944 | if (h->root.type != bfd_link_hash_undefweak | |
3945 | || h->dynindx != -1) | |
0a1b45a2 | 3946 | return true; |
aec6b87e L |
3947 | |
3948 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 3949 | info, h, NULL); |
aec6b87e L |
3950 | } |
3951 | ||
38701953 AM |
3952 | /* Used to decide how to sort relocs in an optimal manner for the |
3953 | dynamic linker, before writing them out. */ | |
3954 | ||
3955 | static enum elf_reloc_type_class | |
cae1fbbb | 3956 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
3957 | const asection *rel_sec ATTRIBUTE_UNUSED, |
3958 | const Elf_Internal_Rela *rela) | |
38701953 | 3959 | { |
cae1fbbb L |
3960 | bfd *abfd = info->output_bfd; |
3961 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3962 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 3963 | |
d9e3b590 L |
3964 | if (htab->dynsym != NULL |
3965 | && htab->dynsym->contents != NULL) | |
3966 | { | |
3967 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 3968 | dynamic symbols. */ |
d9e3b590 | 3969 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); |
c428ce9d L |
3970 | if (r_symndx != STN_UNDEF) |
3971 | { | |
3972 | Elf_Internal_Sym sym; | |
3973 | if (!bed->s->swap_symbol_in (abfd, | |
3974 | (htab->dynsym->contents | |
3975 | + r_symndx * sizeof (Elf32_External_Sym)), | |
3976 | 0, &sym)) | |
3977 | abort (); | |
d9e3b590 | 3978 | |
c428ce9d L |
3979 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
3980 | return reloc_class_ifunc; | |
3981 | } | |
d9e3b590 | 3982 | } |
cae1fbbb | 3983 | |
55fd94b0 | 3984 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 3985 | { |
c428ce9d L |
3986 | case R_386_IRELATIVE: |
3987 | return reloc_class_ifunc; | |
38701953 AM |
3988 | case R_386_RELATIVE: |
3989 | return reloc_class_relative; | |
3990 | case R_386_JUMP_SLOT: | |
3991 | return reloc_class_plt; | |
3992 | case R_386_COPY: | |
3993 | return reloc_class_copy; | |
3994 | default: | |
3995 | return reloc_class_normal; | |
3996 | } | |
3997 | } | |
3998 | ||
252b5132 RH |
3999 | /* Finish up the dynamic sections. */ |
4000 | ||
0a1b45a2 | 4001 | static bool |
55fd94b0 AM |
4002 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4003 | struct bfd_link_info *info) | |
252b5132 | 4004 | { |
0afcef53 | 4005 | struct elf_x86_link_hash_table *htab; |
252b5132 | 4006 | |
9577f60b | 4007 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 | 4008 | if (htab == NULL) |
0a1b45a2 | 4009 | return false; |
4dfe6ac6 | 4010 | |
9577f60b | 4011 | if (!htab->elf.dynamic_sections_created) |
0a1b45a2 | 4012 | return true; |
252b5132 | 4013 | |
9577f60b | 4014 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 4015 | { |
7c80aab9 L |
4016 | if (bfd_is_abs_section (htab->elf.splt->output_section)) |
4017 | { | |
4018 | info->callbacks->einfo | |
4019 | (_("%F%P: discarded output section: `%pA'\n"), | |
4020 | htab->elf.splt); | |
4021 | return false; | |
4022 | } | |
4023 | ||
9577f60b L |
4024 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
4025 | really seem like the right value. */ | |
4026 | elf_section_data (htab->elf.splt->output_section) | |
4027 | ->this_hdr.sh_entsize = 4; | |
252b5132 | 4028 | |
9577f60b | 4029 | if (htab->plt.has_plt0) |
252b5132 | 4030 | { |
9577f60b L |
4031 | /* Fill in the special first entry in the procedure linkage |
4032 | table. */ | |
9577f60b L |
4033 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, |
4034 | htab->lazy_plt->plt0_entry_size); | |
4035 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
851b6fa1 | 4036 | htab->plt0_pad_byte, |
9577f60b L |
4037 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
4038 | if (!bfd_link_pic (info)) | |
252b5132 | 4039 | { |
9577f60b L |
4040 | bfd_put_32 (output_bfd, |
4041 | (htab->elf.sgotplt->output_section->vma | |
4042 | + htab->elf.sgotplt->output_offset | |
4043 | + 4), | |
4044 | htab->elf.splt->contents | |
4045 | + htab->lazy_plt->plt0_got1_offset); | |
4046 | bfd_put_32 (output_bfd, | |
4047 | (htab->elf.sgotplt->output_section->vma | |
4048 | + htab->elf.sgotplt->output_offset | |
4049 | + 8), | |
4050 | htab->elf.splt->contents | |
4051 | + htab->lazy_plt->plt0_got2_offset); | |
1f78f649 | 4052 | |
90c14f0c | 4053 | if (htab->elf.target_os == is_vxworks) |
eac338cf | 4054 | { |
9577f60b L |
4055 | Elf_Internal_Rela rel; |
4056 | int num_plts = (htab->elf.splt->size | |
4057 | / htab->plt.plt_entry_size) - 1; | |
4058 | unsigned char *p; | |
4059 | asection *srelplt2 = htab->srelplt2; | |
4060 | ||
4061 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4062 | + 4. On IA32 we use REL relocations so the | |
4063 | addend goes in the PLT directly. */ | |
4064 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4065 | + htab->elf.splt->output_offset | |
4066 | + htab->lazy_plt->plt0_got1_offset); | |
4067 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4068 | R_386_32); | |
4069 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4070 | srelplt2->contents); | |
4071 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4072 | + 8. */ | |
4073 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4074 | + htab->elf.splt->output_offset | |
4075 | + htab->lazy_plt->plt0_got2_offset); | |
4076 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4077 | R_386_32); | |
4078 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4079 | srelplt2->contents + | |
4080 | sizeof (Elf32_External_Rel)); | |
4081 | /* Correct the .rel.plt.unloaded relocations. */ | |
4082 | p = srelplt2->contents; | |
4083 | if (bfd_link_pic (info)) | |
4084 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4085 | else | |
4086 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
eac338cf | 4087 | |
9577f60b | 4088 | for (; num_plts; num_plts--) |
1f78f649 | 4089 | { |
9577f60b | 4090 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
f604c2a2 | 4091 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
1f78f649 | 4092 | R_386_32); |
9577f60b L |
4093 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4094 | p += sizeof (Elf32_External_Rel); | |
f604c2a2 | 4095 | |
9577f60b L |
4096 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
4097 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
4098 | R_386_32); | |
4099 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
4100 | p += sizeof (Elf32_External_Rel); | |
1f78f649 | 4101 | } |
eac338cf PB |
4102 | } |
4103 | } | |
252b5132 | 4104 | } |
fff53dae L |
4105 | } |
4106 | ||
aec6b87e L |
4107 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4108 | if (bfd_link_pie (info)) | |
4109 | bfd_hash_traverse (&info->hash->table, | |
4110 | elf_i386_pie_finish_undefweak_symbol, | |
4111 | info); | |
4112 | ||
0a1b45a2 | 4113 | return true; |
252b5132 RH |
4114 | } |
4115 | ||
233cc9c1 L |
4116 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4117 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4118 | It has to be done before elf_link_sort_relocs is called so that | |
4119 | dynamic relocations are properly sorted. */ | |
4120 | ||
0a1b45a2 | 4121 | static bool |
233cc9c1 L |
4122 | elf_i386_output_arch_local_syms |
4123 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4124 | struct bfd_link_info *info, | |
4125 | void *flaginfo ATTRIBUTE_UNUSED, | |
4126 | int (*func) (void *, const char *, | |
4127 | Elf_Internal_Sym *, | |
4128 | asection *, | |
4129 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4130 | { | |
0afcef53 L |
4131 | struct elf_x86_link_hash_table *htab |
4132 | = elf_x86_hash_table (info, I386_ELF_DATA); | |
233cc9c1 | 4133 | if (htab == NULL) |
0a1b45a2 | 4134 | return false; |
233cc9c1 L |
4135 | |
4136 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4137 | htab_traverse (htab->loc_hash_table, | |
4138 | elf_i386_finish_local_dynamic_symbol, | |
4139 | info); | |
4140 | ||
0a1b45a2 | 4141 | return true; |
233cc9c1 L |
4142 | } |
4143 | ||
f604c2a2 L |
4144 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all |
4145 | dynamic relocations. */ | |
4146 | ||
4147 | static long | |
4148 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
4149 | long symcount ATTRIBUTE_UNUSED, | |
4150 | asymbol **syms ATTRIBUTE_UNUSED, | |
4151 | long dynsymcount, | |
4152 | asymbol **dynsyms, | |
4153 | asymbol **ret) | |
4154 | { | |
f493882d | 4155 | long count, i, n; |
f604c2a2 | 4156 | int j; |
f604c2a2 | 4157 | bfd_byte *plt_contents; |
f493882d | 4158 | long relsize; |
765e526c L |
4159 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4160 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4161 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4162 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
f604c2a2 L |
4163 | asection *plt; |
4164 | bfd_vma got_addr; | |
f493882d L |
4165 | enum elf_x86_plt_type plt_type; |
4166 | struct elf_x86_plt plts[] = | |
3972882e | 4167 | { |
f493882d L |
4168 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4169 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
4170 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
4171 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } | |
f604c2a2 | 4172 | }; |
144bed8d | 4173 | |
f604c2a2 | 4174 | *ret = NULL; |
144bed8d | 4175 | |
f604c2a2 L |
4176 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4177 | return 0; | |
3972882e | 4178 | |
f604c2a2 L |
4179 | if (dynsymcount <= 0) |
4180 | return 0; | |
cca5b8b6 | 4181 | |
f604c2a2 L |
4182 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4183 | if (relsize <= 0) | |
4184 | return -1; | |
cca5b8b6 | 4185 | |
f604c2a2 L |
4186 | non_lazy_plt = NULL; |
4187 | /* Silence GCC 6. */ | |
4188 | lazy_plt = NULL; | |
ee2fdd6f L |
4189 | non_lazy_ibt_plt = NULL; |
4190 | lazy_ibt_plt = NULL; | |
90c14f0c | 4191 | switch (get_elf_backend_data (abfd)->target_os) |
144bed8d | 4192 | { |
f604c2a2 | 4193 | case is_normal: |
3b4c3844 | 4194 | case is_solaris: |
f604c2a2 | 4195 | non_lazy_plt = &elf_i386_non_lazy_plt; |
ee2fdd6f L |
4196 | lazy_ibt_plt = &elf_i386_lazy_ibt_plt; |
4197 | non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4198 | /* Fall through */ |
4199 | case is_vxworks: | |
4200 | lazy_plt = &elf_i386_lazy_plt; | |
4201 | break; | |
90c14f0c L |
4202 | default: |
4203 | abort (); | |
f604c2a2 L |
4204 | } |
4205 | ||
4206 | got_addr = 0; | |
3972882e | 4207 | |
f604c2a2 L |
4208 | count = 0; |
4209 | for (j = 0; plts[j].name != NULL; j++) | |
4210 | { | |
4211 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4212 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4213 | continue; |
533d0af0 | 4214 | |
f604c2a2 L |
4215 | /* Get the PLT section contents. */ |
4216 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4217 | if (plt_contents == NULL) | |
4218 | break; | |
4219 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4220 | plt_contents, 0, plt->size)) | |
4221 | { | |
4222 | free (plt_contents); | |
4223 | break; | |
4224 | } | |
4225 | ||
4226 | /* Check what kind of PLT it is. */ | |
4227 | plt_type = plt_unknown; | |
90efb642 L |
4228 | if (plts[j].type == plt_unknown |
4229 | && (plt->size >= (lazy_plt->plt0_entry_size | |
4230 | + lazy_plt->plt_entry_size))) | |
f604c2a2 L |
4231 | { |
4232 | /* Match lazy PLT first. */ | |
4233 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
4234 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4235 | { |
4236 | /* The fist entry in the lazy IBT PLT is the same as the | |
4237 | normal lazy PLT. */ | |
4238 | if (lazy_ibt_plt != NULL | |
90efb642 | 4239 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4240 | lazy_ibt_plt->plt_entry, |
4241 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4242 | plt_type = plt_lazy | plt_second; | |
4243 | else | |
4244 | plt_type = plt_lazy; | |
4245 | } | |
f604c2a2 L |
4246 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, |
4247 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4248 | { |
4249 | /* The fist entry in the PIC lazy IBT PLT is the same as | |
4250 | the normal PIC lazy PLT. */ | |
4251 | if (lazy_ibt_plt != NULL | |
90efb642 | 4252 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4253 | lazy_ibt_plt->pic_plt_entry, |
4254 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4255 | plt_type = plt_lazy | plt_pic | plt_second; | |
4256 | else | |
4257 | plt_type = plt_lazy | plt_pic; | |
4258 | } | |
f604c2a2 L |
4259 | } |
4260 | ||
4261 | if (non_lazy_plt != NULL | |
90efb642 L |
4262 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4263 | && plt->size >= non_lazy_plt->plt_entry_size) | |
f604c2a2 L |
4264 | { |
4265 | /* Match non-lazy PLT. */ | |
4266 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4267 | non_lazy_plt->plt_got_offset) == 0) | |
4268 | plt_type = plt_non_lazy; | |
4269 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
4270 | non_lazy_plt->plt_got_offset) == 0) | |
4271 | plt_type = plt_pic; | |
4272 | } | |
4273 | ||
ee2fdd6f | 4274 | if ((non_lazy_ibt_plt != NULL) |
90efb642 L |
4275 | && (plt_type == plt_unknown || plt_type == plt_second) |
4276 | && plt->size >= non_lazy_ibt_plt->plt_entry_size) | |
ee2fdd6f L |
4277 | { |
4278 | if (memcmp (plt_contents, | |
4279 | non_lazy_ibt_plt->plt_entry, | |
4280 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4281 | { | |
4282 | /* Match IBT PLT. */ | |
4283 | plt_type = plt_second; | |
4284 | non_lazy_plt = non_lazy_ibt_plt; | |
4285 | } | |
4286 | else if (memcmp (plt_contents, | |
4287 | non_lazy_ibt_plt->pic_plt_entry, | |
4288 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4289 | { | |
4290 | /* Match PIC IBT PLT. */ | |
4291 | plt_type = plt_second | plt_pic; | |
4292 | non_lazy_plt = non_lazy_ibt_plt; | |
4293 | } | |
4294 | } | |
4295 | ||
f604c2a2 | 4296 | if (plt_type == plt_unknown) |
37c0b6ee L |
4297 | { |
4298 | free (plt_contents); | |
4299 | continue; | |
4300 | } | |
3972882e | 4301 | |
f604c2a2 L |
4302 | plts[j].sec = plt; |
4303 | plts[j].type = plt_type; | |
ec1f73bb | 4304 | |
f604c2a2 L |
4305 | if ((plt_type & plt_lazy)) |
4306 | { | |
4307 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4308 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4309 | /* Skip PLT0 in lazy PLT. */ | |
4310 | i = 1; | |
4311 | } | |
4312 | else | |
4313 | { | |
4314 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4315 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4316 | i = 0; | |
4317 | } | |
fca6ae69 | 4318 | |
ee2fdd6f L |
4319 | /* Skip lazy PLT when the second PLT is used. */ |
4320 | if ((plt_type & (plt_lazy | plt_second)) | |
4321 | == (plt_lazy | plt_second)) | |
4322 | plts[j].count = 0; | |
4323 | else | |
4324 | { | |
4325 | n = plt->size / plts[j].plt_entry_size; | |
4326 | plts[j].count = n; | |
4327 | count += n - i; | |
4328 | } | |
f604c2a2 L |
4329 | |
4330 | plts[j].contents = plt_contents; | |
4331 | ||
4332 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
4333 | if ((plt_type & plt_pic)) | |
4334 | got_addr = (bfd_vma) -1; | |
144bed8d L |
4335 | } |
4336 | ||
f493882d L |
4337 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4338 | got_addr, plts, dynsyms, | |
4339 | ret); | |
4c45e5c9 JJ |
4340 | } |
4341 | ||
f604c2a2 L |
4342 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
4343 | with GNU properties if found. Otherwise, return NULL. */ | |
4344 | ||
4345 | static bfd * | |
4346 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
4347 | { | |
1de031c8 | 4348 | struct elf_x86_init_table init_table; |
f604c2a2 | 4349 | |
90c14f0c | 4350 | switch (get_elf_backend_data (info->output_bfd)->target_os) |
f604c2a2 L |
4351 | { |
4352 | case is_normal: | |
3b4c3844 | 4353 | case is_solaris: |
851b6fa1 | 4354 | init_table.plt0_pad_byte = 0x0; |
1de031c8 L |
4355 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4356 | init_table.non_lazy_plt = &elf_i386_non_lazy_plt; | |
4357 | init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt; | |
4358 | init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4359 | break; |
4360 | case is_vxworks: | |
851b6fa1 | 4361 | init_table.plt0_pad_byte = 0x90; |
1de031c8 L |
4362 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4363 | init_table.non_lazy_plt = NULL; | |
4364 | init_table.lazy_ibt_plt = NULL; | |
4365 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 | 4366 | break; |
90c14f0c L |
4367 | default: |
4368 | abort (); | |
f604c2a2 L |
4369 | } |
4370 | ||
1de031c8 L |
4371 | init_table.r_info = elf32_r_info; |
4372 | init_table.r_sym = elf32_r_sym; | |
7a382c1c | 4373 | |
1de031c8 | 4374 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
f604c2a2 L |
4375 | } |
4376 | ||
6d00b590 | 4377 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
4378 | #define TARGET_LITTLE_NAME "elf32-i386" |
4379 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4380 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
4381 | #define ELF_MACHINE_CODE EM_386 |
4382 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
4383 | |
4384 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4385 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4386 | #define elf_backend_want_got_plt 1 |
4387 | #define elf_backend_plt_readonly 1 | |
4388 | #define elf_backend_want_plt_sym 0 | |
4389 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 4390 | #define elf_backend_plt_alignment 4 |
64f52338 | 4391 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 4392 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4393 | #define elf_backend_caches_rawsize 1 |
5474d94f | 4394 | #define elf_backend_want_dynrelro 1 |
252b5132 | 4395 | |
8c29f035 AM |
4396 | /* Support RELA for objdump of prelink objects. */ |
4397 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
4398 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
4399 | ||
dd5724d5 | 4400 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
dd5724d5 | 4401 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 4402 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 4403 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 | 4404 | |
13285a1b | 4405 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 4406 | #define elf_backend_check_relocs elf_i386_check_relocs |
f604c2a2 | 4407 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 4408 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
4409 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
4410 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 4411 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
c5fccbec DJ |
4412 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
4413 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 4414 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca | 4415 | #define elf_backend_relocate_section elf_i386_relocate_section |
f604c2a2 | 4416 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
9f857535 | 4417 | #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol |
dd5724d5 | 4418 | |
0a1b45a2 | 4419 | #define elf_backend_linux_prpsinfo32_ugid16 true |
a2f63b2e | 4420 | |
8f56f7a2 L |
4421 | #define elf32_bed elf32_i386_bed |
4422 | ||
252b5132 | 4423 | #include "elf32-target.h" |
2bc3c89a AM |
4424 | |
4425 | /* FreeBSD support. */ | |
4426 | ||
4427 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4428 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
4429 | #undef TARGET_LITTLE_NAME |
4430 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
4431 | #undef ELF_OSABI |
4432 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
4433 | |
4434 | /* The kernel recognizes executables as valid only if they carry a | |
4435 | "FreeBSD" label in the ELF header. So we put this label on all | |
4436 | executables and (for simplicity) also all other object files. */ | |
4437 | ||
0a1b45a2 | 4438 | static bool |
ed7e9d0b | 4439 | elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 4440 | { |
ed7e9d0b | 4441 | if (!_bfd_elf_init_file_header (abfd, info)) |
0a1b45a2 | 4442 | return false; |
2bc3c89a | 4443 | |
2bc3c89a | 4444 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
4445 | { |
4446 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
4447 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
4448 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
4449 | } | |
caf47ea6 | 4450 | #endif |
0a1b45a2 | 4451 | return true; |
2bc3c89a AM |
4452 | } |
4453 | ||
ed7e9d0b AM |
4454 | #undef elf_backend_init_file_header |
4455 | #define elf_backend_init_file_header elf_i386_fbsd_init_file_header | |
571fe01f NC |
4456 | #undef elf32_bed |
4457 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 4458 | |
d8045f23 NC |
4459 | #undef elf_backend_add_symbol_hook |
4460 | ||
2bc3c89a | 4461 | #include "elf32-target.h" |
eac338cf | 4462 | |
ed7e9d0b AM |
4463 | #undef elf_backend_init_file_header |
4464 | ||
a6cc6b3b RO |
4465 | /* Solaris 2. */ |
4466 | ||
4467 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4468 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
4469 | #undef TARGET_LITTLE_NAME |
4470 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
4471 | ||
90c14f0c L |
4472 | #undef ELF_TARGET_OS |
4473 | #define ELF_TARGET_OS is_solaris | |
3b4c3844 | 4474 | |
a6cc6b3b RO |
4475 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
4476 | objects won't be recognized. */ | |
4477 | #undef ELF_OSABI | |
4478 | ||
4479 | #undef elf32_bed | |
4480 | #define elf32_bed elf32_i386_sol2_bed | |
4481 | ||
7dc98aea RO |
4482 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
4483 | boundary. */ | |
84865015 | 4484 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
4485 | #define elf_backend_static_tls_alignment 8 |
4486 | ||
a6cc6b3b RO |
4487 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4488 | ||
4489 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4490 | File, p.63. */ | |
84865015 | 4491 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
4492 | #define elf_backend_want_plt_sym 1 |
4493 | ||
84865015 NC |
4494 | #undef elf_backend_strtab_flags |
4495 | #define elf_backend_strtab_flags SHF_STRINGS | |
4496 | ||
5522f910 | 4497 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
07d6d2b8 | 4498 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised |
5522f910 NC |
4499 | FALSE otherwise. ISECTION is the best guess matching section from the |
4500 | input bfd IBFD, but it might be NULL. */ | |
4501 | ||
0a1b45a2 | 4502 | static bool |
5522f910 NC |
4503 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
4504 | bfd *obfd ATTRIBUTE_UNUSED, | |
4505 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
4506 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
4507 | { |
4508 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 | 4509 | and sh_link fields of Solaris specific section types. */ |
0a1b45a2 | 4510 | return false; |
84865015 | 4511 | |
5522f910 | 4512 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
4513 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
4514 | ||
4515 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
4516 | ||
4517 | The following values should be set: | |
07d6d2b8 AM |
4518 | |
4519 | Type Link Info | |
84865015 NC |
4520 | ----------------------------------------------------------------------------- |
4521 | SHT_SUNW_ancillary The section header index of 0 | |
07d6d2b8 AM |
4522 | [0x6fffffee] the associated string table. |
4523 | ||
84865015 | 4524 | SHT_SUNW_capinfo The section header index of For a dynamic object, the |
07d6d2b8 AM |
4525 | [0x6ffffff0] the associated symbol table. section header index of |
4526 | the associated | |
84865015 NC |
4527 | SHT_SUNW_capchain table, |
4528 | otherwise 0. | |
4529 | ||
4530 | SHT_SUNW_symsort The section header index of 0 | |
07d6d2b8 | 4531 | [0x6ffffff1] the associated symbol table. |
84865015 NC |
4532 | |
4533 | SHT_SUNW_tlssort The section header index of 0 | |
07d6d2b8 AM |
4534 | [0x6ffffff2] the associated symbol table. |
4535 | ||
4536 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
4537 | [0x6ffffff3] the associated string table. symbol table index of the | |
4538 | This index is the same string last local symbol, | |
84865015 | 4539 | table used by the SHT_DYNSYM STB_LOCAL. Since |
07d6d2b8 AM |
4540 | section. SHT_SUNW_LDYNSYM only |
4541 | contains local symbols, | |
84865015 NC |
4542 | sh_info is equivalent to |
4543 | the number of symbols in | |
4544 | the table. | |
4545 | ||
07d6d2b8 AM |
4546 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer |
4547 | [0x6ffffff5] the section header index of to named strings, the | |
4548 | the associated section header index of | |
4549 | SHT_SUNW_capinfo table, the associated string | |
4550 | otherwise 0. table, otherwise 0. | |
84865015 | 4551 | |
07d6d2b8 AM |
4552 | SHT_SUNW_move The section header index of 0 |
4553 | [0x6ffffffa] the associated symbol table. | |
4554 | ||
4555 | SHT_SUNW_COMDAT 0 0 | |
84865015 NC |
4556 | [0x6ffffffb] |
4557 | ||
4558 | SHT_SUNW_syminfo The section header index of The section header index | |
07d6d2b8 AM |
4559 | [0x6ffffffc] the associated symbol table. of the associated |
4560 | .dynamic section. | |
84865015 | 4561 | |
07d6d2b8 AM |
4562 | SHT_SUNW_verdef The section header index of The number of version |
4563 | [0x6ffffffd] the associated string table. definitions within the | |
4564 | section. | |
84865015 NC |
4565 | |
4566 | SHT_SUNW_verneed The section header index of The number of version | |
07d6d2b8 AM |
4567 | [0x6ffffffe] the associated string table. dependencies within the |
4568 | section. | |
84865015 | 4569 | |
07d6d2b8 AM |
4570 | SHT_SUNW_versym The section header index of 0 |
4571 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
4572 | } |
4573 | ||
5522f910 NC |
4574 | #undef elf_backend_copy_special_section_fields |
4575 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 4576 | |
a6cc6b3b RO |
4577 | #include "elf32-target.h" |
4578 | ||
bf64a951 L |
4579 | /* Intel MCU support. */ |
4580 | ||
0a1b45a2 | 4581 | static bool |
bf64a951 L |
4582 | elf32_iamcu_elf_object_p (bfd *abfd) |
4583 | { | |
4584 | /* Set the right machine number for an IAMCU elf32 file. */ | |
4585 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
0a1b45a2 | 4586 | return true; |
bf64a951 L |
4587 | } |
4588 | ||
4589 | #undef TARGET_LITTLE_SYM | |
4590 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
4591 | #undef TARGET_LITTLE_NAME | |
4592 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 4593 | #undef ELF_ARCH |
bf64a951 L |
4594 | #define ELF_ARCH bfd_arch_iamcu |
4595 | ||
4596 | #undef ELF_MACHINE_CODE | |
4597 | #define ELF_MACHINE_CODE EM_IAMCU | |
4598 | ||
90c14f0c | 4599 | #undef ELF_TARGET_OS |
bf64a951 L |
4600 | #undef ELF_OSABI |
4601 | ||
4602 | #undef elf32_bed | |
4603 | #define elf32_bed elf32_iamcu_bed | |
4604 | ||
4605 | #undef elf_backend_object_p | |
4606 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
4607 | ||
4608 | #undef elf_backend_static_tls_alignment | |
4609 | ||
4610 | #undef elf_backend_want_plt_sym | |
07d6d2b8 | 4611 | #define elf_backend_want_plt_sym 0 |
bf64a951 | 4612 | |
84865015 | 4613 | #undef elf_backend_strtab_flags |
5522f910 | 4614 | #undef elf_backend_copy_special_section_fields |
84865015 | 4615 | |
bf64a951 L |
4616 | #include "elf32-target.h" |
4617 | ||
4618 | /* Restore defaults. */ | |
4619 | #undef ELF_ARCH | |
4620 | #define ELF_ARCH bfd_arch_i386 | |
4621 | #undef ELF_MACHINE_CODE | |
4622 | #define ELF_MACHINE_CODE EM_386 | |
cc574a35 | 4623 | #undef elf_backend_object_p |
bf64a951 | 4624 | |
eac338cf PB |
4625 | /* VxWorks support. */ |
4626 | ||
4627 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4628 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
4629 | #undef TARGET_LITTLE_NAME |
4630 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 4631 | #undef ELF_OSABI |
1587442d L |
4632 | #undef ELF_MAXPAGESIZE |
4633 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
4634 | #undef elf_backend_plt_alignment |
4635 | #define elf_backend_plt_alignment 4 | |
eac338cf | 4636 | |
90c14f0c L |
4637 | #undef ELF_TARGET_OS |
4638 | #define ELF_TARGET_OS is_vxworks | |
eac338cf | 4639 | |
13285a1b | 4640 | #undef elf_backend_relocs_compatible |
eac338cf PB |
4641 | #undef elf_backend_add_symbol_hook |
4642 | #define elf_backend_add_symbol_hook \ | |
4643 | elf_vxworks_add_symbol_hook | |
4644 | #undef elf_backend_link_output_symbol_hook | |
4645 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 4646 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
4647 | #undef elf_backend_emit_relocs |
4648 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
4649 | #undef elf_backend_final_write_processing | |
4650 | #define elf_backend_final_write_processing \ | |
4651 | elf_vxworks_final_write_processing | |
7dc98aea | 4652 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
4653 | |
4654 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
4655 | define it. */ | |
4656 | #undef elf_backend_want_plt_sym | |
4657 | #define elf_backend_want_plt_sym 1 | |
4658 | ||
4659 | #undef elf32_bed | |
4660 | #define elf32_bed elf32_i386_vxworks_bed | |
4661 | ||
4662 | #include "elf32-target.h" |