Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
2571583a | 2 | Copyright (C) 1993-2017 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" |
5a68afcf | 22 | #include "elf-nacl.h" |
eac338cf | 23 | #include "elf-vxworks.h" |
e41b3a13 | 24 | #include "dwarf2.h" |
02a86693 | 25 | #include "opcode/i386.h" |
252b5132 | 26 | |
55fd94b0 AM |
27 | /* 386 uses REL relocations instead of RELA. */ |
28 | #define USE_REL 1 | |
252b5132 RH |
29 | |
30 | #include "elf/i386.h" | |
31 | ||
32 | static reloc_howto_type elf_howto_table[]= | |
33 | { | |
6346d5ca | 34 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 35 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
36 | TRUE, 0x00000000, 0x00000000, FALSE), |
37 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 38 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
39 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
40 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 41 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
42 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
43 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 44 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
45 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
46 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 47 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
48 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
49 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 50 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
51 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
52 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 53 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
54 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
55 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 56 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
57 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
58 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 59 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
60 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
61 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 62 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
63 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
64 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 65 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 66 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 67 | |
dc47f327 AM |
68 | /* We have a gap in the reloc numbers here. |
69 | R_386_standard counts the number up to this point, and | |
70 | R_386_ext_offset is the value to subtract from a reloc type of | |
71 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
72 | #define R_386_standard (R_386_GOTPC + 1) |
73 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 74 | |
37e55690 | 75 | /* These relocs are a GNU extension. */ |
b34976b6 | 76 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 77 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
78 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
79 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 80 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
81 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
82 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 83 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
84 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
85 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 86 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
87 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
88 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 89 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
90 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
91 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 92 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
93 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
94 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 95 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 96 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 97 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 98 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
99 | TRUE, 0xffff, 0xffff, TRUE), |
100 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 101 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
102 | TRUE, 0xff, 0xff, FALSE), |
103 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 104 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 105 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 106 | |
55fd94b0 AM |
107 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
108 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 109 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 110 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 111 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
112 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
113 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 114 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
115 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
116 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 117 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
118 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
119 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 120 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
121 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
122 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 123 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
124 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
125 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 126 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 127 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
128 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
129 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
130 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
131 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
132 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
133 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
134 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
135 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
136 | FALSE, 0, 0, FALSE), | |
137 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
139 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
140 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
141 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
142 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
143 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
144 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
145 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
146 | |
147 | /* Another gap. */ | |
02a86693 | 148 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 149 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
150 | |
151 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
152 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
153 | 0, /* rightshift */ | |
154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 0, /* bitsize */ | |
b34976b6 | 156 | FALSE, /* pc_relative */ |
252b5132 RH |
157 | 0, /* bitpos */ |
158 | complain_overflow_dont, /* complain_on_overflow */ | |
159 | NULL, /* special_function */ | |
160 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 161 | FALSE, /* partial_inplace */ |
252b5132 RH |
162 | 0, /* src_mask */ |
163 | 0, /* dst_mask */ | |
b34976b6 | 164 | FALSE), /* pcrel_offset */ |
252b5132 RH |
165 | |
166 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
167 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
168 | 0, /* rightshift */ | |
169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 0, /* bitsize */ | |
b34976b6 | 171 | FALSE, /* pc_relative */ |
252b5132 RH |
172 | 0, /* bitpos */ |
173 | complain_overflow_dont, /* complain_on_overflow */ | |
174 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
175 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 176 | FALSE, /* partial_inplace */ |
252b5132 RH |
177 | 0, /* src_mask */ |
178 | 0, /* dst_mask */ | |
b34976b6 | 179 | FALSE) /* pcrel_offset */ |
dc47f327 | 180 | |
55fd94b0 | 181 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
182 | |
183 | }; | |
184 | ||
252b5132 | 185 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
186 | #define TRACE(str) \ |
187 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
188 | #else |
189 | #define TRACE(str) | |
190 | #endif | |
191 | ||
192 | static reloc_howto_type * | |
55fd94b0 AM |
193 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
194 | bfd_reloc_code_real_type code) | |
252b5132 RH |
195 | { |
196 | switch (code) | |
197 | { | |
198 | case BFD_RELOC_NONE: | |
199 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 200 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
201 | |
202 | case BFD_RELOC_32: | |
203 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 204 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
205 | |
206 | case BFD_RELOC_CTOR: | |
207 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 208 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
209 | |
210 | case BFD_RELOC_32_PCREL: | |
211 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 212 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
213 | |
214 | case BFD_RELOC_386_GOT32: | |
215 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 216 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
217 | |
218 | case BFD_RELOC_386_PLT32: | |
219 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 220 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
221 | |
222 | case BFD_RELOC_386_COPY: | |
223 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 224 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
225 | |
226 | case BFD_RELOC_386_GLOB_DAT: | |
227 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 228 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
229 | |
230 | case BFD_RELOC_386_JUMP_SLOT: | |
231 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 232 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
233 | |
234 | case BFD_RELOC_386_RELATIVE: | |
235 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 236 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
237 | |
238 | case BFD_RELOC_386_GOTOFF: | |
239 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 240 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
241 | |
242 | case BFD_RELOC_386_GOTPC: | |
243 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 244 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 245 | |
37e55690 JJ |
246 | /* These relocs are a GNU extension. */ |
247 | case BFD_RELOC_386_TLS_TPOFF: | |
248 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 249 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
250 | |
251 | case BFD_RELOC_386_TLS_IE: | |
252 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 253 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
254 | |
255 | case BFD_RELOC_386_TLS_GOTIE: | |
256 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 257 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 258 | |
13ae64f3 JJ |
259 | case BFD_RELOC_386_TLS_LE: |
260 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 261 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
262 | |
263 | case BFD_RELOC_386_TLS_GD: | |
264 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 265 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
266 | |
267 | case BFD_RELOC_386_TLS_LDM: | |
268 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 269 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 270 | |
252b5132 RH |
271 | case BFD_RELOC_16: |
272 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 273 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
274 | |
275 | case BFD_RELOC_16_PCREL: | |
276 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 277 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
278 | |
279 | case BFD_RELOC_8: | |
280 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 281 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
282 | |
283 | case BFD_RELOC_8_PCREL: | |
284 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 285 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 286 | |
13ae64f3 JJ |
287 | /* Common with Sun TLS implementation. */ |
288 | case BFD_RELOC_386_TLS_LDO_32: | |
289 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 290 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
291 | |
292 | case BFD_RELOC_386_TLS_IE_32: | |
293 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 294 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
295 | |
296 | case BFD_RELOC_386_TLS_LE_32: | |
297 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 298 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
299 | |
300 | case BFD_RELOC_386_TLS_DTPMOD32: | |
301 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 302 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
303 | |
304 | case BFD_RELOC_386_TLS_DTPOFF32: | |
305 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 306 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
307 | |
308 | case BFD_RELOC_386_TLS_TPOFF32: | |
309 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 310 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 311 | |
1788fc08 L |
312 | case BFD_RELOC_SIZE32: |
313 | TRACE ("BFD_RELOC_SIZE32"); | |
314 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
315 | ||
67a4f2b7 AO |
316 | case BFD_RELOC_386_TLS_GOTDESC: |
317 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
318 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
319 | ||
320 | case BFD_RELOC_386_TLS_DESC_CALL: | |
321 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
322 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
323 | ||
324 | case BFD_RELOC_386_TLS_DESC: | |
325 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
326 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
327 | ||
cbe950e9 L |
328 | case BFD_RELOC_386_IRELATIVE: |
329 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 330 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 331 | |
02a86693 L |
332 | case BFD_RELOC_386_GOT32X: |
333 | TRACE ("BFD_RELOC_386_GOT32X"); | |
334 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
335 | ||
252b5132 RH |
336 | case BFD_RELOC_VTABLE_INHERIT: |
337 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 338 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
339 | |
340 | case BFD_RELOC_VTABLE_ENTRY: | |
341 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 342 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
343 | |
344 | default: | |
345 | break; | |
346 | } | |
347 | ||
348 | TRACE ("Unknown"); | |
349 | return 0; | |
350 | } | |
351 | ||
157090f7 AM |
352 | static reloc_howto_type * |
353 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
354 | const char *r_name) | |
355 | { | |
356 | unsigned int i; | |
357 | ||
358 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
359 | if (elf_howto_table[i].name != NULL | |
360 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
361 | return &elf_howto_table[i]; | |
362 | ||
363 | return NULL; | |
364 | } | |
365 | ||
142411ca L |
366 | static reloc_howto_type * |
367 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 368 | { |
dc47f327 AM |
369 | unsigned int indx; |
370 | ||
371 | if ((indx = r_type) >= R_386_standard | |
372 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
373 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 374 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
375 | >= R_386_ext2 - R_386_ext) |
376 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
377 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 378 | { |
695344c0 | 379 | /* xgettext:c-format */ |
4eca0228 AM |
380 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
381 | abfd, (int) r_type); | |
55fd94b0 | 382 | indx = R_386_NONE; |
252b5132 | 383 | } |
06614111 NC |
384 | /* PR 17512: file: 0f67f69d. */ |
385 | if (elf_howto_table [indx].type != r_type) | |
386 | return NULL; | |
142411ca L |
387 | return &elf_howto_table[indx]; |
388 | } | |
389 | ||
390 | static void | |
391 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
392 | arelent *cache_ptr, | |
393 | Elf_Internal_Rela *dst) | |
394 | { | |
395 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
396 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
397 | } |
398 | ||
399 | /* Return whether a symbol name implies a local label. The UnixWare | |
400 | 2.1 cc generates temporary symbols that start with .X, so we | |
401 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
402 | If so, we should move the .X recognition into | |
403 | _bfd_elf_is_local_label_name. */ | |
404 | ||
b34976b6 | 405 | static bfd_boolean |
55fd94b0 | 406 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
407 | { |
408 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 409 | return TRUE; |
252b5132 RH |
410 | |
411 | return _bfd_elf_is_local_label_name (abfd, name); | |
412 | } | |
413 | \f | |
38701953 | 414 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 415 | |
b34976b6 | 416 | static bfd_boolean |
55fd94b0 | 417 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
418 | { |
419 | int offset; | |
eea6121a | 420 | size_t size; |
38701953 | 421 | |
61adc1a4 | 422 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 423 | { |
61adc1a4 NC |
424 | int pr_version = bfd_get_32 (abfd, note->descdata); |
425 | ||
426 | if (pr_version != 1) | |
427 | return FALSE; | |
428 | ||
429 | /* pr_cursig */ | |
228e534f | 430 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
431 | |
432 | /* pr_pid */ | |
228e534f | 433 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
434 | |
435 | /* pr_reg */ | |
436 | offset = 28; | |
eea6121a | 437 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
438 | } |
439 | else | |
440 | { | |
441 | switch (note->descsz) | |
442 | { | |
443 | default: | |
444 | return FALSE; | |
38701953 | 445 | |
61adc1a4 NC |
446 | case 144: /* Linux/i386 */ |
447 | /* pr_cursig */ | |
228e534f | 448 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 449 | |
61adc1a4 | 450 | /* pr_pid */ |
228e534f | 451 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 452 | |
61adc1a4 NC |
453 | /* pr_reg */ |
454 | offset = 72; | |
eea6121a | 455 | size = 68; |
38701953 | 456 | |
61adc1a4 NC |
457 | break; |
458 | } | |
38701953 AM |
459 | } |
460 | ||
461 | /* Make a ".reg/999" section. */ | |
462 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 463 | size, note->descpos + offset); |
38701953 AM |
464 | } |
465 | ||
b34976b6 | 466 | static bfd_boolean |
55fd94b0 | 467 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 468 | { |
61adc1a4 | 469 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 470 | { |
61adc1a4 NC |
471 | int pr_version = bfd_get_32 (abfd, note->descdata); |
472 | ||
473 | if (pr_version != 1) | |
b34976b6 | 474 | return FALSE; |
38701953 | 475 | |
228e534f | 476 | elf_tdata (abfd)->core->program |
61adc1a4 | 477 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 478 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
479 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
480 | } | |
481 | else | |
482 | { | |
483 | switch (note->descsz) | |
484 | { | |
485 | default: | |
486 | return FALSE; | |
487 | ||
488 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 489 | elf_tdata (abfd)->core->pid |
261b8d08 | 490 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 491 | elf_tdata (abfd)->core->program |
61adc1a4 | 492 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 493 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
494 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
495 | } | |
38701953 AM |
496 | } |
497 | ||
498 | /* Note that for some reason, a spurious space is tacked | |
499 | onto the end of the args in some (at least one anyway) | |
500 | implementations, so strip it off if it exists. */ | |
38701953 | 501 | { |
228e534f | 502 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
503 | int n = strlen (command); |
504 | ||
505 | if (0 < n && command[n - 1] == ' ') | |
506 | command[n - 1] = '\0'; | |
507 | } | |
508 | ||
b34976b6 | 509 | return TRUE; |
38701953 AM |
510 | } |
511 | \f | |
512 | /* Functions for the i386 ELF linker. | |
513 | ||
514 | In order to gain some understanding of code in this file without | |
515 | knowing all the intricate details of the linker, note the | |
516 | following: | |
517 | ||
518 | Functions named elf_i386_* are called by external routines, other | |
519 | functions are only called locally. elf_i386_* functions appear | |
520 | in this file more or less in the order in which they are called | |
521 | from external routines. eg. elf_i386_check_relocs is called | |
522 | early in the link process, elf_i386_finish_dynamic_sections is | |
523 | one of the last functions. */ | |
524 | ||
f604c2a2 | 525 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 526 | |
f604c2a2 | 527 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 528 | |
f604c2a2 L |
529 | /* The size in bytes of an entry in the non-lazy procedure linkage |
530 | table. */ | |
252b5132 | 531 | |
f604c2a2 L |
532 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
533 | ||
534 | /* The first entry in an absolute lazy procedure linkage table looks | |
535 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
536 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
537 | ||
538 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
539 | { |
540 | 0xff, 0x35, /* pushl contents of address */ | |
541 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
542 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 543 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
544 | }; |
545 | ||
f604c2a2 L |
546 | /* Subsequent entries in an absolute lazy procedure linkage table look |
547 | like this. */ | |
252b5132 | 548 | |
f604c2a2 | 549 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
550 | { |
551 | 0xff, 0x25, /* jmp indirect */ | |
552 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
553 | 0x68, /* pushl immediate */ | |
554 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
555 | 0xe9, /* jmp relative */ | |
556 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
557 | }; | |
558 | ||
f604c2a2 L |
559 | /* The first entry in a PIC lazy procedure linkage table look like |
560 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
561 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 562 | |
f604c2a2 | 563 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
564 | { |
565 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 566 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
567 | }; |
568 | ||
f604c2a2 L |
569 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
570 | this. */ | |
252b5132 | 571 | |
f604c2a2 | 572 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
573 | { |
574 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
575 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
576 | 0x68, /* pushl immediate */ | |
577 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
578 | 0xe9, /* jmp relative */ | |
579 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
580 | }; | |
581 | ||
f604c2a2 | 582 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 583 | |
f604c2a2 | 584 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
585 | { |
586 | 0xff, 0x25, /* jmp indirect */ | |
587 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
588 | 0x66, 0x90 /* xchg %ax,%ax */ | |
589 | }; | |
590 | ||
f604c2a2 L |
591 | /* Entries in the PIC non-lazy procedure linkage table look like |
592 | this. */ | |
dd7e64d4 | 593 | |
f604c2a2 | 594 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
595 | { |
596 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
597 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
598 | 0x66, 0x90 /* xchg %ax,%ax */ | |
599 | }; | |
600 | ||
ee2fdd6f L |
601 | /* The first entry in an absolute IBT-enabled lazy procedure linkage |
602 | table looks like this. */ | |
603 | ||
604 | static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
605 | { | |
606 | 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */ | |
607 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */ | |
608 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
609 | }; | |
610 | ||
611 | /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage | |
612 | table look like this. Subsequent entries for a PIC IBT-enabled lazy | |
613 | procedure linkage table are the same. */ | |
614 | ||
615 | static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
616 | { | |
617 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
618 | 0x68, 0, 0, 0, 0, /* pushl immediate */ | |
619 | 0xe9, 0, 0, 0, 0, /* jmp relative */ | |
620 | 0x66, 0x90 /* xchg %ax,%ax */ | |
621 | }; | |
622 | ||
623 | /* The first entry in a PIC IBT-enabled lazy procedure linkage table | |
624 | look like. */ | |
625 | ||
626 | static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
627 | { | |
628 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
629 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ | |
630 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
631 | }; | |
632 | ||
633 | /* Entries for branches with IBT-enabled in the absolute non-lazey | |
634 | procedure linkage table look like this. They have the same size | |
635 | as the lazy PLT entry. */ | |
636 | ||
637 | static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
638 | { | |
639 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
640 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */ | |
641 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
642 | }; | |
643 | ||
644 | /* Entries for branches with IBT-enabled in the PIC non-lazey procedure | |
645 | linkage table look like this. They have the same size as the lazy | |
646 | PLT entry. */ | |
647 | ||
648 | static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
649 | { | |
650 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ | |
651 | 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */ | |
652 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
653 | }; | |
654 | ||
f604c2a2 | 655 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 656 | |
f604c2a2 | 657 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
658 | { |
659 | #define PLT_CIE_LENGTH 20 | |
660 | #define PLT_FDE_LENGTH 36 | |
661 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
662 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
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 | { |
f604c2a2 L |
758 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
759 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
f604c2a2 L |
760 | elf_i386_lazy_plt_entry, /* plt_entry */ |
761 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
762 | 2, /* plt0_got1_offset */ |
763 | 8, /* plt0_got2_offset */ | |
764 | 0, /* plt0_got2_insn_end */ | |
25e762b9 RM |
765 | 2, /* plt_got_offset */ |
766 | 7, /* plt_reloc_offset */ | |
767 | 12, /* plt_plt_offset */ | |
765e526c L |
768 | 0, /* plt_got_insn_size */ |
769 | 0, /* plt_plt_insn_end */ | |
25e762b9 | 770 | 6, /* plt_lazy_offset */ |
f604c2a2 L |
771 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ |
772 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
773 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
774 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
775 | }; | |
776 | ||
765e526c | 777 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt = |
f604c2a2 L |
778 | { |
779 | elf_i386_non_lazy_plt_entry, /* plt_entry */ | |
780 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
781 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
782 | 2, /* plt_got_offset */ | |
765e526c | 783 | 0, /* plt_got_insn_size */ |
f604c2a2 L |
784 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ |
785 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
25e762b9 | 786 | }; |
ee2fdd6f | 787 | |
765e526c | 788 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt = |
ee2fdd6f L |
789 | { |
790 | elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */ | |
791 | sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */ | |
ee2fdd6f L |
792 | elf_i386_lazy_ibt_plt_entry, /* plt_entry */ |
793 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
794 | 2, /* plt0_got1_offset */ |
795 | 8, /* plt0_got2_offset */ | |
796 | 0, /* plt0_got2_insn_end */ | |
ee2fdd6f L |
797 | 4+2, /* plt_got_offset */ |
798 | 4+1, /* plt_reloc_offset */ | |
799 | 4+6, /* plt_plt_offset */ | |
765e526c L |
800 | 0, /* plt_got_insn_size */ |
801 | 0, /* plt_plt_insn_end */ | |
ee2fdd6f L |
802 | 0, /* plt_lazy_offset */ |
803 | elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */ | |
804 | elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
805 | elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
806 | sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ | |
807 | }; | |
808 | ||
765e526c | 809 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt = |
ee2fdd6f L |
810 | { |
811 | elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */ | |
812 | elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */ | |
813 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
814 | 4+2, /* plt_got_offset */ | |
765e526c | 815 | 0, /* plt_got_insn_size */ |
ee2fdd6f L |
816 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ |
817 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
818 | }; | |
25e762b9 RM |
819 | \f |
820 | ||
eac338cf PB |
821 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
822 | for the PLTResolve stub and then for each PLT entry. */ | |
823 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
824 | #define PLTRESOLVE_RELOCS 2 | |
825 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
826 | ||
23209a78 RM |
827 | /* Architecture-specific backend data for i386. */ |
828 | ||
829 | struct elf_i386_backend_data | |
830 | { | |
831 | /* Value used to fill the unused bytes of the first PLT entry. */ | |
832 | bfd_byte plt0_pad_byte; | |
833 | ||
f604c2a2 L |
834 | /* Target system. */ |
835 | enum | |
836 | { | |
837 | is_normal, | |
838 | is_vxworks, | |
839 | is_nacl | |
840 | } os; | |
23209a78 RM |
841 | }; |
842 | ||
843 | #define get_elf_i386_backend_data(abfd) \ | |
844 | ((const struct elf_i386_backend_data *) \ | |
845 | get_elf_backend_data (abfd)->arch_data) | |
846 | ||
847 | /* These are the standard parameters. */ | |
848 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
849 | { | |
850 | 0, /* plt0_pad_byte */ | |
f604c2a2 | 851 | is_normal /* os */ |
23209a78 RM |
852 | }; |
853 | ||
854 | #define elf_backend_arch_data &elf_i386_arch_bed | |
855 | ||
0afcef53 | 856 | /* Values in tls_type of x86 ELF linker hash entry. */ |
37e55690 JJ |
857 | #define GOT_TLS_IE 4 |
858 | #define GOT_TLS_IE_POS 5 | |
859 | #define GOT_TLS_IE_NEG 6 | |
860 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
861 | #define GOT_TLS_GDESC 8 |
862 | #define GOT_TLS_GD_BOTH_P(type) \ | |
863 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
864 | #define GOT_TLS_GD_P(type) \ | |
865 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
866 | #define GOT_TLS_GDESC_P(type) \ | |
867 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
868 | #define GOT_TLS_GD_ANY_P(type) \ | |
869 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
67a4f2b7 | 870 | |
0ffa91dd NC |
871 | #define is_i386_elf(bfd) \ |
872 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
873 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 874 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 875 | |
b34976b6 | 876 | static bfd_boolean |
55fd94b0 | 877 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 878 | { |
0afcef53 L |
879 | return bfd_elf_allocate_object (abfd, |
880 | sizeof (struct elf_x86_obj_tdata), | |
4dfe6ac6 | 881 | I386_ELF_DATA); |
13ae64f3 | 882 | } |
cedb70c5 | 883 | |
67a4f2b7 | 884 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 885 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 886 | |
142411ca L |
887 | /* Return TRUE if the TLS access code sequence support transition |
888 | from R_TYPE. */ | |
889 | ||
890 | static bfd_boolean | |
bedfd056 | 891 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
892 | bfd_byte *contents, |
893 | Elf_Internal_Shdr *symtab_hdr, | |
894 | struct elf_link_hash_entry **sym_hashes, | |
895 | unsigned int r_type, | |
896 | const Elf_Internal_Rela *rel, | |
897 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 898 | { |
6eaa7fb5 | 899 | unsigned int val, type, reg; |
142411ca L |
900 | unsigned long r_symndx; |
901 | struct elf_link_hash_entry *h; | |
902 | bfd_vma offset; | |
6eaa7fb5 | 903 | bfd_byte *call; |
1d4af308 | 904 | bfd_boolean indirect_call; |
142411ca | 905 | |
142411ca | 906 | offset = rel->r_offset; |
13ae64f3 | 907 | switch (r_type) |
142411ca L |
908 | { |
909 | case R_386_TLS_GD: | |
910 | case R_386_TLS_LDM: | |
911 | if (offset < 2 || (rel + 1) >= relend) | |
912 | return FALSE; | |
913 | ||
6eaa7fb5 L |
914 | indirect_call = FALSE; |
915 | call = contents + offset + 4; | |
916 | val = *(call - 5); | |
917 | type = *(call - 6); | |
142411ca L |
918 | if (r_type == R_386_TLS_GD) |
919 | { | |
09e8c3bf | 920 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
921 | leal foo@tlsgd(,%ebx,1), %eax |
922 | call ___tls_get_addr@PLT | |
923 | or | |
924 | leal foo@tlsgd(%ebx) %eax | |
925 | call ___tls_get_addr@PLT | |
926 | nop | |
927 | or | |
928 | leal foo@tlsgd(%reg), %eax | |
929 | call *___tls_get_addr@GOT(%reg) | |
930 | which may be converted to | |
931 | addr32 call ___tls_get_addr | |
142411ca | 932 | can transit to different access model. */ |
6eaa7fb5 L |
933 | if ((offset + 10) > sec->size |
934 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
935 | return FALSE; |
936 | ||
142411ca L |
937 | if (type == 0x04) |
938 | { | |
6eaa7fb5 L |
939 | /* leal foo@tlsgd(,%ebx,1), %eax |
940 | call ___tls_get_addr@PLT */ | |
142411ca L |
941 | if (offset < 3) |
942 | return FALSE; | |
943 | ||
6eaa7fb5 L |
944 | if (*(call - 7) != 0x8d |
945 | || val != 0x1d | |
946 | || call[0] != 0xe8) | |
142411ca L |
947 | return FALSE; |
948 | } | |
949 | else | |
950 | { | |
6eaa7fb5 L |
951 | /* This must be |
952 | leal foo@tlsgd(%ebx), %eax | |
953 | call ___tls_get_addr@PLT | |
954 | nop | |
955 | or | |
956 | leal foo@tlsgd(%reg), %eax | |
957 | call *___tls_get_addr@GOT(%reg) | |
958 | which may be converted to | |
959 | addr32 call ___tls_get_addr | |
960 | ||
961 | %eax can't be used as the GOT base register since it | |
962 | is used to pass parameter to ___tls_get_addr. */ | |
963 | reg = val & 7; | |
964 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
965 | return FALSE; |
966 | ||
6eaa7fb5 L |
967 | indirect_call = call[0] == 0xff; |
968 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
969 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
970 | && !(indirect_call | |
971 | && (call[1] & 0xf8) == 0x90 | |
972 | && (call[1] & 0x7) == reg)) | |
142411ca L |
973 | return FALSE; |
974 | } | |
975 | } | |
976 | else | |
977 | { | |
978 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
979 | leal foo@tlsldm(%ebx), %eax |
980 | call ___tls_get_addr@PLT | |
981 | or | |
982 | leal foo@tlsldm(%reg), %eax | |
983 | call *___tls_get_addr@GOT(%reg) | |
984 | which may be converted to | |
985 | addr32 call ___tls_get_addr | |
142411ca L |
986 | can transit to different access model. */ |
987 | if (type != 0x8d || (offset + 9) > sec->size) | |
988 | return FALSE; | |
989 | ||
6eaa7fb5 L |
990 | /* %eax can't be used as the GOT base register since it is |
991 | used to pass parameter to ___tls_get_addr. */ | |
992 | reg = val & 7; | |
993 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 994 | return FALSE; |
142411ca | 995 | |
6eaa7fb5 L |
996 | indirect_call = call[0] == 0xff; |
997 | if (!(reg == 3 && call[0] == 0xe8) | |
998 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
999 | && !(indirect_call | |
1000 | && (call[1] & 0xf8) == 0x90 | |
1001 | && (call[1] & 0x7) == reg)) | |
1002 | return FALSE; | |
1003 | } | |
142411ca L |
1004 | |
1005 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1006 | if (r_symndx < symtab_hdr->sh_info) | |
1007 | return FALSE; | |
1008 | ||
1009 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 1010 | if (h == NULL |
0afcef53 | 1011 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
6eaa7fb5 L |
1012 | return FALSE; |
1013 | else if (indirect_call) | |
1014 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
1015 | else | |
1016 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1017 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
1018 | |
1019 | case R_386_TLS_IE: | |
1020 | /* Check transition from IE access model: | |
1021 | movl foo@indntpoff(%rip), %eax | |
1022 | movl foo@indntpoff(%rip), %reg | |
1023 | addl foo@indntpoff(%rip), %reg | |
1024 | */ | |
1025 | ||
1026 | if (offset < 1 || (offset + 4) > sec->size) | |
1027 | return FALSE; | |
1028 | ||
1029 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1030 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1031 | if (val == 0xa1) | |
1032 | return TRUE; | |
1033 | ||
1034 | if (offset < 2) | |
1035 | return FALSE; | |
1036 | ||
1037 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1038 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1039 | return ((type == 0x8b || type == 0x03) | |
1040 | && (val & 0xc7) == 0x05); | |
1041 | ||
1042 | case R_386_TLS_GOTIE: | |
1043 | case R_386_TLS_IE_32: | |
1044 | /* Check transition from {IE_32,GOTIE} access model: | |
1045 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1046 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1047 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1048 | */ | |
1049 | ||
1050 | if (offset < 2 || (offset + 4) > sec->size) | |
1051 | return FALSE; | |
1052 | ||
1053 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1054 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1055 | return FALSE; | |
1056 | ||
1057 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1058 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1059 | ||
1060 | case R_386_TLS_GOTDESC: | |
1061 | /* Check transition from GDesc access model: | |
1062 | leal x@tlsdesc(%ebx), %eax | |
1063 | ||
1064 | Make sure it's a leal adding ebx to a 32-bit offset | |
1065 | into any register, although it's probably almost always | |
1066 | going to be eax. */ | |
1067 | ||
1068 | if (offset < 2 || (offset + 4) > sec->size) | |
1069 | return FALSE; | |
1070 | ||
1071 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1072 | return FALSE; | |
1073 | ||
1074 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1075 | return (val & 0xc7) == 0x83; | |
1076 | ||
1077 | case R_386_TLS_DESC_CALL: | |
1078 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1079 | call *x@tlsdesc(%eax) |
142411ca L |
1080 | */ |
1081 | if (offset + 2 <= sec->size) | |
1082 | { | |
6eaa7fb5 L |
1083 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1084 | call = contents + offset; | |
1085 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1086 | } |
1087 | ||
1088 | return FALSE; | |
1089 | ||
1090 | default: | |
1091 | abort (); | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | /* Return TRUE if the TLS access transition is OK or no transition | |
1096 | will be performed. Update R_TYPE if there is a transition. */ | |
1097 | ||
1098 | static bfd_boolean | |
1099 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1100 | asection *sec, bfd_byte *contents, | |
1101 | Elf_Internal_Shdr *symtab_hdr, | |
1102 | struct elf_link_hash_entry **sym_hashes, | |
1103 | unsigned int *r_type, int tls_type, | |
1104 | const Elf_Internal_Rela *rel, | |
1105 | const Elf_Internal_Rela *relend, | |
4c544807 | 1106 | struct elf_link_hash_entry *h, |
bedfd056 L |
1107 | unsigned long r_symndx, |
1108 | bfd_boolean from_relocate_section) | |
142411ca L |
1109 | { |
1110 | unsigned int from_type = *r_type; | |
1111 | unsigned int to_type = from_type; | |
1112 | bfd_boolean check = TRUE; | |
1113 | ||
bb1cb422 L |
1114 | /* Skip TLS transition for functions. */ |
1115 | if (h != NULL | |
1116 | && (h->type == STT_FUNC | |
1117 | || h->type == STT_GNU_IFUNC)) | |
1118 | return TRUE; | |
1119 | ||
142411ca | 1120 | switch (from_type) |
13ae64f3 JJ |
1121 | { |
1122 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1123 | case R_386_TLS_GOTDESC: |
1124 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1125 | case R_386_TLS_IE_32: |
37e55690 JJ |
1126 | case R_386_TLS_IE: |
1127 | case R_386_TLS_GOTIE: | |
0e1862bb | 1128 | if (bfd_link_executable (info)) |
142411ca L |
1129 | { |
1130 | if (h == NULL) | |
1131 | to_type = R_386_TLS_LE_32; | |
1132 | else if (from_type != R_386_TLS_IE | |
1133 | && from_type != R_386_TLS_GOTIE) | |
1134 | to_type = R_386_TLS_IE_32; | |
1135 | } | |
1136 | ||
bedfd056 L |
1137 | /* When we are called from elf_i386_relocate_section, there may |
1138 | be additional transitions based on TLS_TYPE. */ | |
1139 | if (from_relocate_section) | |
142411ca L |
1140 | { |
1141 | unsigned int new_to_type = to_type; | |
1142 | ||
0e1862bb | 1143 | if (bfd_link_executable (info) |
142411ca L |
1144 | && h != NULL |
1145 | && h->dynindx == -1 | |
1146 | && (tls_type & GOT_TLS_IE)) | |
1147 | new_to_type = R_386_TLS_LE_32; | |
1148 | ||
1149 | if (to_type == R_386_TLS_GD | |
1150 | || to_type == R_386_TLS_GOTDESC | |
1151 | || to_type == R_386_TLS_DESC_CALL) | |
1152 | { | |
1153 | if (tls_type == GOT_TLS_IE_POS) | |
1154 | new_to_type = R_386_TLS_GOTIE; | |
1155 | else if (tls_type & GOT_TLS_IE) | |
1156 | new_to_type = R_386_TLS_IE_32; | |
1157 | } | |
1158 | ||
1159 | /* We checked the transition before when we were called from | |
1160 | elf_i386_check_relocs. We only want to check the new | |
1161 | transition which hasn't been checked before. */ | |
1162 | check = new_to_type != to_type && from_type == to_type; | |
1163 | to_type = new_to_type; | |
1164 | } | |
1165 | ||
1166 | break; | |
1167 | ||
13ae64f3 | 1168 | case R_386_TLS_LDM: |
0e1862bb | 1169 | if (bfd_link_executable (info)) |
142411ca L |
1170 | to_type = R_386_TLS_LE_32; |
1171 | break; | |
1172 | ||
1173 | default: | |
1174 | return TRUE; | |
1175 | } | |
1176 | ||
1177 | /* Return TRUE if there is no transition. */ | |
1178 | if (from_type == to_type) | |
1179 | return TRUE; | |
1180 | ||
1181 | /* Check if the transition can be performed. */ | |
1182 | if (check | |
bedfd056 | 1183 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1184 | symtab_hdr, sym_hashes, |
1185 | from_type, rel, relend)) | |
1186 | { | |
2f629d23 | 1187 | reloc_howto_type *from, *to; |
4c544807 | 1188 | const char *name; |
142411ca L |
1189 | |
1190 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1191 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1192 | ||
4c544807 L |
1193 | if (h) |
1194 | name = h->root.root.string; | |
1195 | else | |
1196 | { | |
0afcef53 | 1197 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1198 | |
0afcef53 | 1199 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1200 | if (htab == NULL) |
1201 | name = "*unknown*"; | |
1202 | else | |
1203 | { | |
1204 | Elf_Internal_Sym *isym; | |
1205 | ||
1206 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1207 | abfd, r_symndx); | |
1208 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1209 | } | |
4c544807 L |
1210 | } |
1211 | ||
4eca0228 | 1212 | _bfd_error_handler |
695344c0 | 1213 | /* xgettext:c-format */ |
d42c267e | 1214 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1215 | "in section `%A' failed"), |
c08bb8dd | 1216 | abfd, from->name, to->name, name, |
d42c267e | 1217 | rel->r_offset, sec); |
142411ca L |
1218 | bfd_set_error (bfd_error_bad_value); |
1219 | return FALSE; | |
13ae64f3 JJ |
1220 | } |
1221 | ||
142411ca L |
1222 | *r_type = to_type; |
1223 | return TRUE; | |
13ae64f3 JJ |
1224 | } |
1225 | ||
c175a657 L |
1226 | /* With the local symbol, foo, we convert |
1227 | mov foo@GOT[(%reg1)], %reg2 | |
1228 | to | |
1229 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1230 | and convert | |
1231 | call/jmp *foo@GOT[(%reg)] | |
1232 | to | |
1233 | nop call foo/jmp foo nop | |
1234 | When PIC is false, convert | |
1235 | test %reg1, foo@GOT[(%reg2)] | |
1236 | to | |
1237 | test $foo, %reg1 | |
1238 | and convert | |
1239 | binop foo@GOT[(%reg1)], %reg2 | |
1240 | to | |
1241 | binop $foo, %reg2 | |
1242 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1243 | instructions. */ | |
1244 | ||
1245 | static | |
1246 | bfd_boolean | |
1247 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1248 | bfd_byte *contents, | |
1249 | Elf_Internal_Rela *irel, | |
1250 | struct elf_link_hash_entry *h, | |
1251 | bfd_boolean *converted, | |
1252 | struct bfd_link_info *link_info) | |
1253 | { | |
0afcef53 | 1254 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1255 | unsigned int opcode; |
1256 | unsigned int modrm; | |
1257 | bfd_boolean baseless; | |
1258 | Elf_Internal_Sym *isym; | |
1259 | unsigned int addend; | |
1260 | unsigned int nop; | |
1261 | bfd_vma nop_offset; | |
1262 | bfd_boolean is_pic; | |
1263 | bfd_boolean to_reloc_32; | |
1264 | unsigned int r_type; | |
1265 | unsigned int r_symndx; | |
1266 | bfd_vma roff = irel->r_offset; | |
1267 | ||
1268 | if (roff < 2) | |
1269 | return TRUE; | |
1270 | ||
7d4d9709 | 1271 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1272 | addend = bfd_get_32 (abfd, contents + roff); |
1273 | if (addend != 0) | |
1274 | return TRUE; | |
1275 | ||
0afcef53 | 1276 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
c175a657 L |
1277 | is_pic = bfd_link_pic (link_info); |
1278 | ||
1279 | r_type = ELF32_R_TYPE (irel->r_info); | |
1280 | r_symndx = ELF32_R_SYM (irel->r_info); | |
1281 | ||
1282 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1283 | baseless = (modrm & 0xc7) == 0x5; | |
1284 | ||
7d4d9709 | 1285 | if (baseless && is_pic) |
c175a657 L |
1286 | { |
1287 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1288 | since we don't know what the GOT base is. */ |
c175a657 L |
1289 | const char *name; |
1290 | ||
1291 | if (h == NULL) | |
1292 | { | |
1293 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1294 | r_symndx); | |
1295 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1296 | } | |
1297 | else | |
1298 | name = h->root.root.string; | |
1299 | ||
4eca0228 | 1300 | _bfd_error_handler |
695344c0 | 1301 | /* xgettext:c-format */ |
63a5468a AM |
1302 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base" |
1303 | " register can not be used when making a shared object"), | |
c175a657 L |
1304 | abfd, name); |
1305 | return FALSE; | |
1306 | } | |
1307 | ||
1308 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1309 | ||
c175a657 L |
1310 | /* Convert to R_386_32 if PIC is false or there is no base |
1311 | register. */ | |
1312 | to_reloc_32 = !is_pic || baseless; | |
1313 | ||
7d4d9709 L |
1314 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1315 | reloc. */ | |
c175a657 L |
1316 | if (h == NULL) |
1317 | { | |
1318 | if (opcode == 0x0ff) | |
1319 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1320 | goto convert_branch; | |
1321 | else | |
1322 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1323 | "test %reg1, foo@GOT(%reg2)" and | |
1324 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1325 | goto convert_load; | |
1326 | } | |
1327 | ||
1328 | /* Undefined weak symbol is only bound locally in executable | |
1329 | and its reference is resolved as 0. */ | |
0afcef53 L |
1330 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, I386_ELF_DATA, TRUE, |
1331 | elf_x86_hash_entry (h))) | |
c175a657 L |
1332 | { |
1333 | if (opcode == 0xff) | |
1334 | { | |
1335 | /* No direct branch to 0 for PIC. */ | |
1336 | if (is_pic) | |
1337 | return TRUE; | |
1338 | else | |
1339 | goto convert_branch; | |
1340 | } | |
1341 | else | |
1342 | { | |
1343 | /* We can convert load of address 0 to R_386_32. */ | |
1344 | to_reloc_32 = TRUE; | |
1345 | goto convert_load; | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | if (opcode == 0xff) | |
1350 | { | |
1351 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1352 | if ((h->root.type == bfd_link_hash_defined | |
1353 | || h->root.type == bfd_link_hash_defweak) | |
1354 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1355 | { | |
1356 | /* The function is locally defined. */ | |
1357 | convert_branch: | |
1358 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1359 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1360 | { | |
0afcef53 L |
1361 | struct elf_x86_link_hash_entry *eh |
1362 | = (struct elf_x86_link_hash_entry *) h; | |
6eaa7fb5 | 1363 | |
c175a657 L |
1364 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1365 | is a nop prefix. */ | |
1366 | modrm = 0xe8; | |
6eaa7fb5 L |
1367 | /* To support TLS optimization, always use addr32 prefix |
1368 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1d4af308 | 1369 | if (eh && eh->tls_get_addr) |
c175a657 | 1370 | { |
6eaa7fb5 L |
1371 | nop = 0x67; |
1372 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1373 | } |
1374 | else | |
6eaa7fb5 L |
1375 | { |
1376 | nop = link_info->call_nop_byte; | |
1377 | if (link_info->call_nop_as_suffix) | |
1378 | { | |
1379 | nop_offset = roff + 3; | |
1380 | irel->r_offset -= 1; | |
1381 | } | |
1382 | else | |
1383 | nop_offset = roff - 2; | |
1384 | } | |
c175a657 L |
1385 | } |
1386 | else | |
1387 | { | |
1388 | /* Convert to "jmp foo nop". */ | |
1389 | modrm = 0xe9; | |
1390 | nop = NOP_OPCODE; | |
1391 | nop_offset = roff + 3; | |
1392 | irel->r_offset -= 1; | |
1393 | } | |
1394 | ||
1395 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1396 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1397 | /* When converting to PC-relative relocation, we | |
1398 | need to adjust addend by -4. */ | |
1399 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1400 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
1401 | ||
1402 | *converted = TRUE; | |
1403 | } | |
1404 | } | |
1405 | else | |
1406 | { | |
1407 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1408 | "test %reg1, foo@GOT(%reg2)" and | |
1409 | "binop foo@GOT[(%reg1)], %reg2". | |
1410 | ||
1411 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1412 | link-time address. */ | |
1413 | if (h == htab->elf.hdynamic) | |
1414 | return TRUE; | |
1415 | ||
1416 | /* def_regular is set by an assignment in a linker script in | |
cbd0eecf L |
1417 | bfd_elf_record_link_assignment. start_stop is set on |
1418 | __start_SECNAME/__stop_SECNAME which mark section SECNAME. */ | |
1419 | if (h->start_stop | |
1420 | || ((h->def_regular | |
1421 | || h->root.type == bfd_link_hash_defined | |
1422 | || h->root.type == bfd_link_hash_defweak) | |
1423 | && SYMBOL_REFERENCES_LOCAL (link_info, h))) | |
c175a657 L |
1424 | { |
1425 | convert_load: | |
1426 | if (opcode == 0x8b) | |
1427 | { | |
1428 | if (to_reloc_32) | |
1429 | { | |
1430 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1431 | "mov $foo, %reg2" with R_386_32. */ | |
1432 | r_type = R_386_32; | |
1433 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1434 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1435 | opcode = 0xc7; | |
1436 | } | |
1437 | else | |
1438 | { | |
1439 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1440 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1441 | r_type = R_386_GOTOFF; | |
1442 | opcode = 0x8d; | |
1443 | } | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | /* Only R_386_32 is supported. */ | |
1448 | if (!to_reloc_32) | |
1449 | return TRUE; | |
1450 | ||
1451 | if (opcode == 0x85) | |
1452 | { | |
1453 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1454 | "test $foo, %reg1". */ | |
1455 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1456 | opcode = 0xf7; | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1461 | "binop $foo, %reg2". */ | |
1462 | modrm = (0xc0 | |
1463 | | (modrm & 0x38) >> 3 | |
1464 | | (opcode & 0x3c)); | |
1465 | opcode = 0x81; | |
1466 | } | |
1467 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1468 | r_type = R_386_32; | |
1469 | } | |
1470 | ||
1471 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1472 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
1473 | ||
1474 | *converted = TRUE; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | return TRUE; | |
1479 | } | |
1480 | ||
c1d11331 L |
1481 | /* Rename some of the generic section flags to better document how they |
1482 | are used here. */ | |
c337a162 L |
1483 | #define need_convert_load sec_flg0 |
1484 | #define check_relocs_failed sec_flg1 | |
c1d11331 | 1485 | |
252b5132 | 1486 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1487 | calculate needed space in the global offset table, procedure linkage |
1488 | table, and dynamic reloc sections. */ | |
252b5132 | 1489 | |
b34976b6 | 1490 | static bfd_boolean |
55fd94b0 AM |
1491 | elf_i386_check_relocs (bfd *abfd, |
1492 | struct bfd_link_info *info, | |
1493 | asection *sec, | |
1494 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1495 | { |
0afcef53 | 1496 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1497 | Elf_Internal_Shdr *symtab_hdr; |
1498 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1499 | const Elf_Internal_Rela *rel; |
1500 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1501 | asection *sreloc; |
bedfd056 | 1502 | bfd_byte *contents; |
252b5132 | 1503 | |
0e1862bb | 1504 | if (bfd_link_relocatable (info)) |
b34976b6 | 1505 | return TRUE; |
252b5132 | 1506 | |
081b1afe L |
1507 | /* Don't do anything special with non-loaded, non-alloced sections. |
1508 | In particular, any relocs in such sections should not affect GOT | |
1509 | and PLT reference counting (ie. we don't allow them to create GOT | |
1510 | or PLT entries), there's no possibility or desire to optimize TLS | |
1511 | relocs, and there's not much point in propagating relocs to shared | |
1512 | libs that the dynamic linker won't relocate. */ | |
1513 | if ((sec->flags & SEC_ALLOC) == 0) | |
1514 | return TRUE; | |
1515 | ||
0ffa91dd NC |
1516 | BFD_ASSERT (is_i386_elf (abfd)); |
1517 | ||
0afcef53 | 1518 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 1519 | if (htab == NULL) |
c337a162 L |
1520 | { |
1521 | sec->check_relocs_failed = 1; | |
1522 | return FALSE; | |
1523 | } | |
4dfe6ac6 | 1524 | |
bedfd056 L |
1525 | /* Get the section contents. */ |
1526 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1527 | contents = elf_section_data (sec)->this_hdr.contents; | |
1528 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1529 | { | |
1530 | sec->check_relocs_failed = 1; | |
1531 | return FALSE; | |
1532 | } | |
1533 | ||
0ffa91dd | 1534 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1535 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1536 | |
252b5132 RH |
1537 | sreloc = NULL; |
1538 | ||
1539 | rel_end = relocs + sec->reloc_count; | |
1540 | for (rel = relocs; rel < rel_end; rel++) | |
1541 | { | |
13ae64f3 | 1542 | unsigned int r_type; |
d42c267e | 1543 | unsigned int r_symndx; |
252b5132 | 1544 | struct elf_link_hash_entry *h; |
0afcef53 | 1545 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1546 | Elf_Internal_Sym *isym; |
1547 | const char *name; | |
06a6a421 | 1548 | bfd_boolean size_reloc; |
252b5132 RH |
1549 | |
1550 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1551 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1552 | |
d9bc7a44 | 1553 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1554 | { |
695344c0 | 1555 | /* xgettext:c-format */ |
4eca0228 AM |
1556 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1557 | abfd, r_symndx); | |
c337a162 | 1558 | goto error_return; |
f5f31454 L |
1559 | } |
1560 | ||
252b5132 | 1561 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1562 | { |
1563 | /* A local symbol. */ | |
c2e61a4e L |
1564 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1565 | abfd, r_symndx); | |
1566 | if (isym == NULL) | |
c337a162 | 1567 | goto error_return; |
c25bc9fc L |
1568 | |
1569 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1570 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1571 | { | |
0afcef53 | 1572 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1573 | if (h == NULL) |
c337a162 | 1574 | goto error_return; |
6bbec505 | 1575 | |
c25bc9fc | 1576 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1577 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1578 | isym, NULL); | |
c25bc9fc L |
1579 | h->type = STT_GNU_IFUNC; |
1580 | h->def_regular = 1; | |
1581 | h->ref_regular = 1; | |
1582 | h->forced_local = 1; | |
1583 | h->root.type = bfd_link_hash_defined; | |
1584 | } | |
1585 | else | |
1586 | h = NULL; | |
1587 | } | |
252b5132 | 1588 | else |
71cb9464 | 1589 | { |
4c544807 | 1590 | isym = NULL; |
71cb9464 L |
1591 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1592 | while (h->root.type == bfd_link_hash_indirect | |
1593 | || h->root.type == bfd_link_hash_warning) | |
1594 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1595 | } |
cbe950e9 | 1596 | |
0afcef53 | 1597 | eh = (struct elf_x86_link_hash_entry *) h; |
c25bc9fc L |
1598 | if (h != NULL) |
1599 | { | |
f604c2a2 L |
1600 | if (r_type == R_386_GOTOFF) |
1601 | eh->gotoff_ref = 1; | |
cbe950e9 | 1602 | |
ad1e85de L |
1603 | /* It is referenced by a non-shared object. */ |
1604 | h->ref_regular = 1; | |
bc4e12de | 1605 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
1606 | |
1607 | if (h->type == STT_GNU_IFUNC) | |
1608 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1609 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1610 | } |
252b5132 | 1611 | |
bedfd056 | 1612 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1613 | symtab_hdr, sym_hashes, |
1614 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1615 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1616 | goto error_return; |
13ae64f3 JJ |
1617 | |
1618 | switch (r_type) | |
252b5132 | 1619 | { |
37e55690 | 1620 | case R_386_TLS_LDM: |
0afcef53 | 1621 | htab->tls_ld_or_ldm_got.refcount += 1; |
37e55690 JJ |
1622 | goto create_got; |
1623 | ||
1624 | case R_386_PLT32: | |
1625 | /* This symbol requires a procedure linkage table entry. We | |
1626 | actually build the entry in adjust_dynamic_symbol, | |
1627 | because this might be a case of linking PIC code which is | |
1628 | never referenced by a dynamic object, in which case we | |
1629 | don't need to generate a procedure linkage table entry | |
1630 | after all. */ | |
1631 | ||
1632 | /* If this is a local symbol, we resolve it directly without | |
1633 | creating a procedure linkage table entry. */ | |
1634 | if (h == NULL) | |
1635 | continue; | |
1636 | ||
aec6b87e | 1637 | eh->has_got_reloc = 1; |
f5385ebf | 1638 | h->needs_plt = 1; |
37e55690 JJ |
1639 | h->plt.refcount += 1; |
1640 | break; | |
1641 | ||
6a3e1bae | 1642 | case R_386_SIZE32: |
06a6a421 | 1643 | size_reloc = TRUE; |
6a3e1bae L |
1644 | goto do_size; |
1645 | ||
13ae64f3 | 1646 | case R_386_TLS_IE_32: |
37e55690 JJ |
1647 | case R_386_TLS_IE: |
1648 | case R_386_TLS_GOTIE: | |
0e1862bb | 1649 | if (!bfd_link_executable (info)) |
13ae64f3 | 1650 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1651 | /* Fall through */ |
1652 | ||
252b5132 | 1653 | case R_386_GOT32: |
02a86693 | 1654 | case R_386_GOT32X: |
13ae64f3 | 1655 | case R_386_TLS_GD: |
67a4f2b7 AO |
1656 | case R_386_TLS_GOTDESC: |
1657 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1658 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1659 | { |
1660 | int tls_type, old_tls_type; | |
1661 | ||
1662 | switch (r_type) | |
1663 | { | |
1664 | default: | |
02a86693 L |
1665 | case R_386_GOT32: |
1666 | case R_386_GOT32X: | |
1667 | tls_type = GOT_NORMAL; | |
1668 | break; | |
13ae64f3 | 1669 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1670 | case R_386_TLS_GOTDESC: |
1671 | case R_386_TLS_DESC_CALL: | |
1672 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1673 | case R_386_TLS_IE_32: |
1674 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1675 | tls_type = GOT_TLS_IE_NEG; | |
1676 | else | |
ebcfb3c0 JJ |
1677 | /* If this is a GD->IE transition, we may use either of |
1678 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1679 | tls_type = GOT_TLS_IE; |
1680 | break; | |
1681 | case R_386_TLS_IE: | |
1682 | case R_386_TLS_GOTIE: | |
1683 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1684 | } |
1685 | ||
1686 | if (h != NULL) | |
1687 | { | |
1688 | h->got.refcount += 1; | |
0afcef53 | 1689 | old_tls_type = elf_x86_hash_entry (h)->tls_type; |
13ae64f3 JJ |
1690 | } |
1691 | else | |
1692 | { | |
1693 | bfd_signed_vma *local_got_refcounts; | |
1694 | ||
1695 | /* This is a global offset table entry for a local symbol. */ | |
1696 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1697 | if (local_got_refcounts == NULL) | |
1698 | { | |
1699 | bfd_size_type size; | |
1700 | ||
1701 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1702 | size *= (sizeof (bfd_signed_vma) |
1703 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1704 | local_got_refcounts = (bfd_signed_vma *) |
1705 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1706 | if (local_got_refcounts == NULL) |
c337a162 | 1707 | goto error_return; |
13ae64f3 | 1708 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1709 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1710 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1711 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1712 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1713 | } |
1714 | local_got_refcounts[r_symndx] += 1; | |
0afcef53 | 1715 | old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
13ae64f3 JJ |
1716 | } |
1717 | ||
37e55690 JJ |
1718 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1719 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1720 | /* If a TLS symbol is accessed using IE at least once, |
1721 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1722 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1723 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1724 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1725 | { |
67a4f2b7 | 1726 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1727 | tls_type = old_tls_type; |
67a4f2b7 AO |
1728 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1729 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1730 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1731 | else |
1732 | { | |
09a24cbf | 1733 | if (h) |
4c544807 L |
1734 | name = h->root.root.string; |
1735 | else | |
1736 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1737 | NULL); | |
4eca0228 | 1738 | _bfd_error_handler |
695344c0 | 1739 | /* xgettext:c-format */ |
d003868e | 1740 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1741 | "thread local symbol"), |
4c544807 | 1742 | abfd, name); |
68c4a57e | 1743 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 1744 | goto error_return; |
13ae64f3 JJ |
1745 | } |
1746 | } | |
1747 | ||
1748 | if (old_tls_type != tls_type) | |
1749 | { | |
1750 | if (h != NULL) | |
0afcef53 | 1751 | elf_x86_hash_entry (h)->tls_type = tls_type; |
13ae64f3 | 1752 | else |
0afcef53 | 1753 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
13ae64f3 JJ |
1754 | } |
1755 | } | |
0ac8d2ca AM |
1756 | /* Fall through */ |
1757 | ||
1758 | case R_386_GOTOFF: | |
1759 | case R_386_GOTPC: | |
13ae64f3 | 1760 | create_got: |
37e55690 | 1761 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1762 | { |
1763 | if (eh != NULL) | |
1764 | eh->has_got_reloc = 1; | |
1765 | break; | |
1766 | } | |
37e55690 | 1767 | /* Fall through */ |
252b5132 | 1768 | |
37e55690 JJ |
1769 | case R_386_TLS_LE_32: |
1770 | case R_386_TLS_LE: | |
aec6b87e L |
1771 | if (eh != NULL) |
1772 | eh->has_got_reloc = 1; | |
0e1862bb | 1773 | if (bfd_link_executable (info)) |
37e55690 | 1774 | break; |
bffbf940 | 1775 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1776 | goto do_relocation; |
252b5132 RH |
1777 | |
1778 | case R_386_32: | |
1779 | case R_386_PC32: | |
aec6b87e L |
1780 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
1781 | eh->has_non_got_reloc = 1; | |
1782 | do_relocation: | |
bf52d7c7 L |
1783 | /* We are called after all symbols have been resolved. Only |
1784 | relocation against STT_GNU_IFUNC symbol must go through | |
1785 | PLT. */ | |
d1ed1c7d L |
1786 | if (h != NULL |
1787 | && (bfd_link_executable (info) | |
bf52d7c7 | 1788 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 1789 | { |
12d0ee4a | 1790 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1791 | need a copy reloc. We can't check reliably at this |
1792 | stage whether the section is read-only, as input | |
1793 | sections have not yet been mapped to output sections. | |
1794 | Tentatively set the flag for now, and correct in | |
1795 | adjust_dynamic_symbol. */ | |
f5385ebf | 1796 | h->non_got_ref = 1; |
12d0ee4a | 1797 | |
233cc9c1 L |
1798 | /* We may need a .plt entry if the symbol is a function |
1799 | defined in a shared lib or is a STT_GNU_IFUNC function | |
1800 | referenced from the code or read-only section. */ | |
34bb2571 L |
1801 | if (!h->def_regular |
1802 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
233cc9c1 L |
1803 | h->plt.refcount += 1; |
1804 | ||
4b627c18 L |
1805 | if (r_type == R_386_PC32) |
1806 | { | |
1807 | /* Since something like ".long foo - ." may be used | |
1808 | as pointer, make sure that PLT is used if foo is | |
1809 | a function defined in a shared library. */ | |
1810 | if ((sec->flags & SEC_CODE) == 0) | |
1811 | h->pointer_equality_needed = 1; | |
74437ea2 L |
1812 | else if (h->type == STT_GNU_IFUNC |
1813 | && bfd_link_pic (info)) | |
1814 | { | |
6322e5c5 L |
1815 | _bfd_error_handler |
1816 | /* xgettext:c-format */ | |
1817 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), | |
1818 | abfd, h->root.root.string); | |
74437ea2 L |
1819 | bfd_set_error (bfd_error_bad_value); |
1820 | goto error_return; | |
1821 | } | |
4b627c18 L |
1822 | } |
1823 | else | |
04ebc307 L |
1824 | { |
1825 | h->pointer_equality_needed = 1; | |
1826 | /* R_386_32 can be resolved at run-time. */ | |
1827 | if (r_type == R_386_32 | |
1828 | && (sec->flags & SEC_READONLY) == 0) | |
1829 | eh->func_pointer_refcount += 1; | |
1830 | } | |
6725bdbf | 1831 | } |
7843f00e | 1832 | |
06a6a421 | 1833 | size_reloc = FALSE; |
6a3e1bae | 1834 | do_size: |
252b5132 | 1835 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1836 | against a global symbol, or a non PC relative reloc |
1837 | against a local symbol, then we need to copy the reloc | |
1838 | into the shared library. However, if we are linking with | |
1839 | -Bsymbolic, we do not need to copy a reloc against a | |
1840 | global symbol which is defined in an object we are | |
1841 | including in the link (i.e., DEF_REGULAR is set). At | |
1842 | this point we have not seen all the input files, so it is | |
1843 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1844 | later (it is never cleared). In case of a weak definition, |
1845 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1846 | a shared library. We account for that possibility below by |
1f655a09 L |
1847 | storing information in the relocs_copied field of the hash |
1848 | table entry. A similar situation occurs when creating | |
1849 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1850 | symbol local. |
56882138 | 1851 | |
12d0ee4a AM |
1852 | If on the other hand, we are creating an executable, we |
1853 | may need to keep relocations for symbols satisfied by a | |
1854 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
1855 | symbol. |
1856 | ||
1857 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
1858 | symbol in the non-code section. */ | |
081b1afe L |
1859 | if ((bfd_link_pic (info) |
1860 | && (r_type != R_386_PC32 | |
1861 | || (h != NULL | |
1862 | && (! (bfd_link_pie (info) | |
1863 | || SYMBOLIC_BIND (info, h)) | |
1864 | || h->root.type == bfd_link_hash_defweak | |
1865 | || !h->def_regular)))) | |
233cc9c1 L |
1866 | || (h != NULL |
1867 | && h->type == STT_GNU_IFUNC | |
1868 | && r_type == R_386_32 | |
1869 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
1870 | || (ELIMINATE_COPY_RELOCS |
1871 | && !bfd_link_pic (info) | |
1872 | && h != NULL | |
1873 | && (h->root.type == bfd_link_hash_defweak | |
1874 | || !h->def_regular))) | |
252b5132 | 1875 | { |
e03a8ed8 L |
1876 | struct elf_dyn_relocs *p; |
1877 | struct elf_dyn_relocs **head; | |
ec338859 | 1878 | |
12d0ee4a AM |
1879 | /* We must copy these reloc types into the output file. |
1880 | Create a reloc section in dynobj and make room for | |
1881 | this reloc. */ | |
252b5132 RH |
1882 | if (sreloc == NULL) |
1883 | { | |
83bac4b0 NC |
1884 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1885 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1886 | ||
252b5132 | 1887 | if (sreloc == NULL) |
c337a162 | 1888 | goto error_return; |
252b5132 RH |
1889 | } |
1890 | ||
0c715baa AM |
1891 | /* If this is a global symbol, we count the number of |
1892 | relocations we need for this symbol. */ | |
1893 | if (h != NULL) | |
252b5132 | 1894 | { |
d5597ebc | 1895 | head = &eh->dyn_relocs; |
0c715baa AM |
1896 | } |
1897 | else | |
1898 | { | |
ec338859 AM |
1899 | /* Track dynamic relocs needed for local syms too. |
1900 | We really need local syms available to do this | |
1901 | easily. Oh well. */ | |
87d72d41 | 1902 | void **vpp; |
ec338859 | 1903 | asection *s; |
87d72d41 AM |
1904 | |
1905 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1906 | abfd, r_symndx); | |
1907 | if (isym == NULL) | |
c337a162 | 1908 | goto error_return; |
87d72d41 AM |
1909 | |
1910 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1911 | if (s == NULL) |
87d72d41 | 1912 | s = sec; |
ec338859 | 1913 | |
e81d3500 | 1914 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1915 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1916 | } |
1917 | ||
1918 | p = *head; | |
1919 | if (p == NULL || p->sec != sec) | |
1920 | { | |
1921 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1922 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1923 | amt); | |
ec338859 | 1924 | if (p == NULL) |
c337a162 | 1925 | goto error_return; |
ec338859 AM |
1926 | p->next = *head; |
1927 | *head = p; | |
1928 | p->sec = sec; | |
1929 | p->count = 0; | |
1930 | p->pc_count = 0; | |
252b5132 | 1931 | } |
ec338859 AM |
1932 | |
1933 | p->count += 1; | |
06a6a421 L |
1934 | /* Count size relocation as PC-relative relocation. */ |
1935 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1936 | p->pc_count += 1; |
252b5132 | 1937 | } |
252b5132 RH |
1938 | break; |
1939 | ||
1940 | /* This relocation describes the C++ object vtable hierarchy. | |
1941 | Reconstruct it for later use during GC. */ | |
1942 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1943 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 1944 | goto error_return; |
252b5132 RH |
1945 | break; |
1946 | ||
1947 | /* This relocation describes which C++ vtable entries are actually | |
1948 | used. Record for later use during GC. */ | |
1949 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1950 | BFD_ASSERT (h != NULL); |
1951 | if (h != NULL | |
1952 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 1953 | goto error_return; |
252b5132 RH |
1954 | break; |
1955 | ||
1956 | default: | |
1957 | break; | |
1958 | } | |
dd7e64d4 | 1959 | |
52bf37dd | 1960 | if (r_type == R_386_GOT32X |
c1d11331 | 1961 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 1962 | sec->need_convert_load = 1; |
252b5132 RH |
1963 | } |
1964 | ||
bedfd056 L |
1965 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1966 | { | |
1967 | if (!info->keep_memory) | |
1968 | free (contents); | |
1969 | else | |
1970 | { | |
1971 | /* Cache the section contents for elf_link_input_bfd. */ | |
1972 | elf_section_data (sec)->this_hdr.contents = contents; | |
1973 | } | |
1974 | } | |
1975 | ||
b34976b6 | 1976 | return TRUE; |
c337a162 L |
1977 | |
1978 | error_return: | |
bedfd056 L |
1979 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1980 | free (contents); | |
c337a162 L |
1981 | sec->check_relocs_failed = 1; |
1982 | return FALSE; | |
252b5132 RH |
1983 | } |
1984 | ||
1985 | /* Return the section that should be marked against GC for a given | |
1986 | relocation. */ | |
1987 | ||
1988 | static asection * | |
55fd94b0 | 1989 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1990 | struct bfd_link_info *info, |
55fd94b0 AM |
1991 | Elf_Internal_Rela *rel, |
1992 | struct elf_link_hash_entry *h, | |
1993 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1994 | { |
1995 | if (h != NULL) | |
07adf181 AM |
1996 | switch (ELF32_R_TYPE (rel->r_info)) |
1997 | { | |
1998 | case R_386_GNU_VTINHERIT: | |
1999 | case R_386_GNU_VTENTRY: | |
2000 | return NULL; | |
2001 | } | |
2002 | ||
2003 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2004 | } |
2005 | ||
252b5132 RH |
2006 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2007 | regular object. The current definition is in some section of the | |
2008 | dynamic object, but we're not including those sections. We have to | |
2009 | change the definition to something the rest of the link can | |
2010 | understand. */ | |
2011 | ||
b34976b6 | 2012 | static bfd_boolean |
55fd94b0 AM |
2013 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2014 | struct elf_link_hash_entry *h) | |
252b5132 | 2015 | { |
0afcef53 | 2016 | struct elf_x86_link_hash_table *htab; |
5474d94f | 2017 | asection *s, *srel; |
0afcef53 | 2018 | struct elf_x86_link_hash_entry *eh; |
5ca5bb35 | 2019 | struct elf_dyn_relocs *p; |
252b5132 | 2020 | |
cbe950e9 L |
2021 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2022 | if (h->type == STT_GNU_IFUNC) | |
2023 | { | |
73bcf233 L |
2024 | /* All local STT_GNU_IFUNC references must be treate as local |
2025 | calls via local PLT. */ | |
5ca5bb35 L |
2026 | if (h->ref_regular |
2027 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2028 | { | |
73bcf233 | 2029 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2030 | struct elf_dyn_relocs **pp; |
2031 | ||
0afcef53 | 2032 | eh = (struct elf_x86_link_hash_entry *) h; |
5ca5bb35 L |
2033 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2034 | { | |
2035 | pc_count += p->pc_count; | |
2036 | p->count -= p->pc_count; | |
2037 | p->pc_count = 0; | |
73bcf233 | 2038 | count += p->count; |
5ca5bb35 L |
2039 | if (p->count == 0) |
2040 | *pp = p->next; | |
2041 | else | |
2042 | pp = &p->next; | |
2043 | } | |
2044 | ||
73bcf233 | 2045 | if (pc_count || count) |
5ca5bb35 | 2046 | { |
5ca5bb35 | 2047 | h->non_got_ref = 1; |
233cc9c1 L |
2048 | if (pc_count) |
2049 | { | |
2050 | /* Increment PLT reference count only for PC-relative | |
2051 | references. */ | |
2052 | h->needs_plt = 1; | |
2053 | if (h->plt.refcount <= 0) | |
2054 | h->plt.refcount = 1; | |
2055 | else | |
2056 | h->plt.refcount += 1; | |
2057 | } | |
5ca5bb35 L |
2058 | } |
2059 | } | |
2060 | ||
cbe950e9 L |
2061 | if (h->plt.refcount <= 0) |
2062 | { | |
2063 | h->plt.offset = (bfd_vma) -1; | |
2064 | h->needs_plt = 0; | |
2065 | } | |
2066 | return TRUE; | |
2067 | } | |
2068 | ||
252b5132 RH |
2069 | /* If this is a function, put it in the procedure linkage table. We |
2070 | will fill in the contents of the procedure linkage table later, | |
2071 | when we know the address of the .got section. */ | |
2072 | if (h->type == STT_FUNC | |
f5385ebf | 2073 | || h->needs_plt) |
252b5132 | 2074 | { |
6725bdbf | 2075 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2076 | || SYMBOL_CALLS_LOCAL (info, h) |
2077 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2078 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2079 | { |
2080 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2081 | file, but the symbol was never referred to by a dynamic |
2082 | object, or if all references were garbage collected. In | |
2083 | such a case, we don't actually need to build a procedure | |
2084 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2085 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2086 | h->needs_plt = 0; |
252b5132 RH |
2087 | } |
2088 | ||
b34976b6 | 2089 | return TRUE; |
252b5132 | 2090 | } |
6725bdbf AM |
2091 | else |
2092 | /* It's possible that we incorrectly decided a .plt reloc was | |
2093 | needed for an R_386_PC32 reloc to a non-function sym in | |
2094 | check_relocs. We can't decide accurately between function and | |
2095 | non-function syms in check-relocs; Objects loaded later in | |
2096 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2097 | h->plt.offset = (bfd_vma) -1; |
252b5132 | 2098 | |
0afcef53 | 2099 | eh = (struct elf_x86_link_hash_entry *) h; |
a5b4ee94 | 2100 | |
252b5132 RH |
2101 | /* If this is a weak symbol, and there is a real definition, the |
2102 | processor independent code will have arranged for us to see the | |
2103 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2104 | if (h->u.weakdef != NULL) |
252b5132 | 2105 | { |
f6e332e6 AM |
2106 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2107 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2108 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2109 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a5b4ee94 L |
2110 | if (ELIMINATE_COPY_RELOCS |
2111 | || info->nocopyreloc | |
2112 | || SYMBOL_NO_COPYRELOC (info, eh)) | |
f6e332e6 | 2113 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2114 | return TRUE; |
252b5132 RH |
2115 | } |
2116 | ||
2117 | /* This is a reference to a symbol defined by a dynamic object which | |
2118 | is not a function. */ | |
2119 | ||
2120 | /* If we are creating a shared library, we must presume that the | |
2121 | only references to the symbol are via the global offset table. | |
2122 | For such cases we need not do anything here; the relocations will | |
2123 | be handled correctly by relocate_section. */ | |
0e1862bb | 2124 | if (!bfd_link_executable (info)) |
b34976b6 | 2125 | return TRUE; |
252b5132 | 2126 | |
7843f00e | 2127 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2128 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2129 | reloc. */ | |
d5597ebc | 2130 | if (!h->non_got_ref && !eh->gotoff_ref) |
b34976b6 | 2131 | return TRUE; |
7843f00e | 2132 | |
8bd621d8 | 2133 | /* If -z nocopyreloc was given, we won't generate them either. */ |
a5b4ee94 | 2134 | if (info->nocopyreloc || SYMBOL_NO_COPYRELOC (info, eh)) |
8bd621d8 | 2135 | { |
f5385ebf | 2136 | h->non_got_ref = 0; |
b34976b6 | 2137 | return TRUE; |
8bd621d8 AM |
2138 | } |
2139 | ||
0afcef53 | 2140 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
2141 | if (htab == NULL) |
2142 | return FALSE; | |
643796e3 | 2143 | |
d5597ebc L |
2144 | /* If there aren't any dynamic relocs in read-only sections nor |
2145 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2146 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2147 | not have dynamic relocations (other than copy and jump slot | |
2148 | relocations) in an executable. */ | |
23209a78 | 2149 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2150 | && !eh->gotoff_ref |
f604c2a2 | 2151 | && get_elf_i386_backend_data (info->output_bfd)->os != is_vxworks) |
ebe50bae | 2152 | { |
a23b6845 AM |
2153 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2154 | { | |
2155 | s = p->sec->output_section; | |
2156 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2157 | break; | |
2158 | } | |
2159 | ||
a23b6845 AM |
2160 | if (p == NULL) |
2161 | { | |
f5385ebf | 2162 | h->non_got_ref = 0; |
a23b6845 AM |
2163 | return TRUE; |
2164 | } | |
ebe50bae AM |
2165 | } |
2166 | ||
252b5132 RH |
2167 | /* We must allocate the symbol in our .dynbss section, which will |
2168 | become part of the .bss section of the executable. There will be | |
2169 | an entry for this symbol in the .dynsym section. The dynamic | |
2170 | object will contain position independent code, so all references | |
2171 | from the dynamic object to this symbol will go through the global | |
2172 | offset table. The dynamic linker will use the .dynsym entry to | |
2173 | determine the address it must put in the global offset table, so | |
2174 | both the dynamic object and the regular object will refer to the | |
2175 | same memory location for the variable. */ | |
2176 | ||
252b5132 RH |
2177 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2178 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2179 | runtime process image. */ |
5474d94f AM |
2180 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2181 | { | |
2182 | s = htab->elf.sdynrelro; | |
2183 | srel = htab->elf.sreldynrelro; | |
2184 | } | |
2185 | else | |
2186 | { | |
2187 | s = htab->elf.sdynbss; | |
2188 | srel = htab->elf.srelbss; | |
2189 | } | |
1d7e9d18 | 2190 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2191 | { |
5474d94f | 2192 | srel->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2193 | h->needs_copy = 1; |
252b5132 RH |
2194 | } |
2195 | ||
6cabe1ea | 2196 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2197 | } |
2198 | ||
6725bdbf | 2199 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2200 | dynamic relocs. */ |
6725bdbf | 2201 | |
b34976b6 | 2202 | static bfd_boolean |
eb4ff4d6 | 2203 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2204 | { |
2205 | struct bfd_link_info *info; | |
0afcef53 L |
2206 | struct elf_x86_link_hash_table *htab; |
2207 | struct elf_x86_link_hash_entry *eh; | |
e03a8ed8 | 2208 | struct elf_dyn_relocs *p; |
25e762b9 | 2209 | unsigned plt_entry_size; |
aec6b87e | 2210 | bfd_boolean resolved_to_zero; |
f604c2a2 | 2211 | const struct elf_i386_backend_data *bed; |
6725bdbf | 2212 | |
e92d460e | 2213 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2214 | return TRUE; |
6725bdbf | 2215 | |
0afcef53 | 2216 | eh = (struct elf_x86_link_hash_entry *) h; |
e92d460e | 2217 | |
6725bdbf | 2218 | info = (struct bfd_link_info *) inf; |
0afcef53 | 2219 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
2220 | if (htab == NULL) |
2221 | return FALSE; | |
6725bdbf | 2222 | |
f604c2a2 L |
2223 | bed = get_elf_i386_backend_data (info->output_bfd); |
2224 | ||
765e526c | 2225 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 2226 | |
e62b9723 | 2227 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 2228 | I386_ELF_DATA, |
e62b9723 L |
2229 | eh->has_got_reloc, |
2230 | eh); | |
aec6b87e | 2231 | |
04ebc307 L |
2232 | /* Clear the reference count of function pointer relocations if |
2233 | symbol isn't a normal function. */ | |
2234 | if (h->type != STT_FUNC) | |
2235 | eh->func_pointer_refcount = 0; | |
2236 | ||
dd7e64d4 L |
2237 | /* We can't use the GOT PLT if pointer equality is needed since |
2238 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2239 | linker won't update the GOT slot. We will get into an infinite | |
2240 | loop at run-time. */ | |
2241 | if (htab->plt_got != NULL | |
2242 | && h->type != STT_GNU_IFUNC | |
2243 | && !h->pointer_equality_needed | |
2244 | && h->plt.refcount > 0 | |
2245 | && h->got.refcount > 0) | |
2246 | { | |
2247 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2248 | reloctions. */ | |
2249 | h->plt.offset = (bfd_vma) -1; | |
2250 | ||
2251 | /* Use the GOT PLT. */ | |
2252 | eh->plt_got.refcount = 1; | |
2253 | } | |
2254 | ||
cbe950e9 L |
2255 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2256 | here if it is defined and referenced in a non-shared object. */ | |
2257 | if (h->type == STT_GNU_IFUNC | |
2258 | && h->def_regular) | |
ee2fdd6f L |
2259 | { |
2260 | if (_bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, | |
2261 | &htab->readonly_dynrelocs_against_ifunc, | |
2262 | plt_entry_size, | |
765e526c | 2263 | (htab->plt.has_plt0 |
0afcef53 | 2264 | * plt_entry_size), |
ee2fdd6f L |
2265 | 4, TRUE)) |
2266 | { | |
2267 | asection *s = htab->plt_second; | |
2268 | if (h->plt.offset != (bfd_vma) -1 && s != NULL) | |
2269 | { | |
2270 | /* Use the second PLT section if it is created. */ | |
2271 | eh->plt_second.offset = s->size; | |
2272 | ||
2273 | /* Make room for this entry in the second PLT section. */ | |
765e526c | 2274 | s->size += htab->non_lazy_plt->plt_entry_size; |
ee2fdd6f L |
2275 | } |
2276 | ||
2277 | return TRUE; | |
2278 | } | |
2279 | else | |
2280 | return FALSE; | |
2281 | } | |
04ebc307 L |
2282 | /* Don't create the PLT entry if there are only function pointer |
2283 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2284 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2285 | && (h->plt.refcount > eh->func_pointer_refcount |
2286 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2287 | { |
dc2be3d2 | 2288 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 2289 | |
04ebc307 L |
2290 | /* Clear the reference count of function pointer relocations |
2291 | if PLT is used. */ | |
2292 | eh->func_pointer_refcount = 0; | |
2293 | ||
5a15f56f AM |
2294 | /* Make sure this symbol is output as a dynamic symbol. |
2295 | Undefined weak syms won't yet be marked as dynamic. */ | |
2296 | if (h->dynindx == -1 | |
aec6b87e | 2297 | && !h->forced_local |
0dc9a308 L |
2298 | && !resolved_to_zero |
2299 | && h->root.type == bfd_link_hash_undefweak) | |
5a15f56f | 2300 | { |
c152c796 | 2301 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2302 | return FALSE; |
5a15f56f AM |
2303 | } |
2304 | ||
0e1862bb | 2305 | if (bfd_link_pic (info) |
4e795f50 | 2306 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2307 | { |
6de2ae4a | 2308 | asection *s = htab->elf.splt; |
ee2fdd6f | 2309 | asection *second_s = htab->plt_second; |
dd7e64d4 | 2310 | asection *got_s = htab->plt_got; |
6725bdbf | 2311 | |
7c1e8d3e L |
2312 | /* If this is the first .plt entry, make room for the special |
2313 | first entry. The .plt section is used by prelink to undo | |
2314 | prelinking for dynamic relocations. */ | |
2315 | if (s->size == 0) | |
765e526c | 2316 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 2317 | |
dd7e64d4 L |
2318 | if (use_plt_got) |
2319 | eh->plt_got.offset = got_s->size; | |
2320 | else | |
ee2fdd6f L |
2321 | { |
2322 | h->plt.offset = s->size; | |
2323 | if (second_s) | |
2324 | eh->plt_second.offset = second_s->size; | |
2325 | } | |
6725bdbf | 2326 | |
ced53ee5 AM |
2327 | /* If this symbol is not defined in a regular file, and we are |
2328 | not generating a shared library, then set the symbol to this | |
2329 | location in the .plt. This is required to make function | |
2330 | pointers compare as equal between the normal executable and | |
2331 | the shared library. */ | |
0e1862bb | 2332 | if (! bfd_link_pic (info) |
f5385ebf | 2333 | && !h->def_regular) |
ced53ee5 | 2334 | { |
dd7e64d4 L |
2335 | if (use_plt_got) |
2336 | { | |
2337 | /* We need to make a call to the entry of the GOT PLT | |
2338 | instead of regular PLT entry. */ | |
2339 | h->root.u.def.section = got_s; | |
2340 | h->root.u.def.value = eh->plt_got.offset; | |
2341 | } | |
2342 | else | |
2343 | { | |
ee2fdd6f L |
2344 | if (second_s) |
2345 | { | |
2346 | /* We need to make a call to the entry of the | |
2347 | second PLT instead of regular PLT entry. */ | |
2348 | h->root.u.def.section = second_s; | |
2349 | h->root.u.def.value = eh->plt_second.offset; | |
2350 | } | |
2351 | else | |
2352 | { | |
2353 | h->root.u.def.section = s; | |
2354 | h->root.u.def.value = h->plt.offset; | |
2355 | } | |
dd7e64d4 | 2356 | } |
ced53ee5 | 2357 | } |
6725bdbf | 2358 | |
ced53ee5 | 2359 | /* Make room for this entry. */ |
dd7e64d4 | 2360 | if (use_plt_got) |
765e526c | 2361 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
2362 | else |
2363 | { | |
2364 | s->size += plt_entry_size; | |
ee2fdd6f | 2365 | if (second_s) |
765e526c | 2366 | second_s->size += htab->non_lazy_plt->plt_entry_size; |
6725bdbf | 2367 | |
dd7e64d4 L |
2368 | /* We also need to make an entry in the .got.plt section, |
2369 | which will be placed in the .got section by the linker | |
2370 | script. */ | |
2371 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2372 | |
aec6b87e L |
2373 | /* There should be no PLT relocation against resolved |
2374 | undefined weak symbol in executable. */ | |
2375 | if (!resolved_to_zero) | |
2376 | { | |
2377 | /* We also need to make an entry in the .rel.plt | |
2378 | section. */ | |
2379 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2380 | htab->elf.srelplt->reloc_count++; | |
2381 | } | |
dd7e64d4 | 2382 | } |
eac338cf | 2383 | |
f604c2a2 | 2384 | if (bed->os == is_vxworks && !bfd_link_pic (info)) |
eac338cf PB |
2385 | { |
2386 | /* VxWorks has a second set of relocations for each PLT entry | |
2387 | in executables. They go in a separate relocation section, | |
2388 | which is processed by the kernel loader. */ | |
2389 | ||
2390 | /* There are two relocations for the initial PLT entry: an | |
2391 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2392 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2393 | ||
765e526c | 2394 | asection *srelplt2 = htab->srelplt2; |
25e762b9 | 2395 | if (h->plt.offset == plt_entry_size) |
0afcef53 | 2396 | srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
eac338cf PB |
2397 | |
2398 | /* There are two extra relocations for each subsequent PLT entry: | |
2399 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2400 | relocation for the PLT entry. */ | |
2401 | ||
0afcef53 | 2402 | srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
eac338cf | 2403 | } |
6725bdbf | 2404 | } |
ced53ee5 AM |
2405 | else |
2406 | { | |
13f42277 | 2407 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2408 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2409 | h->needs_plt = 0; |
ced53ee5 | 2410 | } |
6725bdbf AM |
2411 | } |
2412 | else | |
2413 | { | |
13f42277 | 2414 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2415 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2416 | h->needs_plt = 0; |
6725bdbf AM |
2417 | } |
2418 | ||
67a4f2b7 AO |
2419 | eh->tlsdesc_got = (bfd_vma) -1; |
2420 | ||
37e55690 | 2421 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2422 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2423 | if (h->got.refcount > 0 | |
0e1862bb | 2424 | && bfd_link_executable (info) |
13ae64f3 | 2425 | && h->dynindx == -1 |
0afcef53 | 2426 | && (elf_x86_hash_entry (h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2427 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2428 | else if (h->got.refcount > 0) |
6725bdbf | 2429 | { |
0ac8d2ca | 2430 | asection *s; |
b34976b6 | 2431 | bfd_boolean dyn; |
0afcef53 | 2432 | int tls_type = elf_x86_hash_entry (h)->tls_type; |
6725bdbf | 2433 | |
5a15f56f | 2434 | /* Make sure this symbol is output as a dynamic symbol. |
0dc9a308 | 2435 | Undefined weak syms won't yet be marked as dynamic. */ |
5a15f56f | 2436 | if (h->dynindx == -1 |
aec6b87e | 2437 | && !h->forced_local |
e133d005 | 2438 | && !resolved_to_zero |
0dc9a308 | 2439 | && h->root.type == bfd_link_hash_undefweak) |
5a15f56f | 2440 | { |
c152c796 | 2441 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2442 | return FALSE; |
5a15f56f AM |
2443 | } |
2444 | ||
6de2ae4a | 2445 | s = htab->elf.sgot; |
67a4f2b7 AO |
2446 | if (GOT_TLS_GDESC_P (tls_type)) |
2447 | { | |
6de2ae4a | 2448 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2449 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2450 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2451 | h->got.offset = (bfd_vma) -2; |
2452 | } | |
2453 | if (! GOT_TLS_GDESC_P (tls_type) | |
2454 | || GOT_TLS_GD_P (tls_type)) | |
2455 | { | |
2456 | h->got.offset = s->size; | |
2457 | s->size += 4; | |
2458 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2459 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2460 | s->size += 4; | |
2461 | } | |
ebe50bae | 2462 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2463 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2464 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2465 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2466 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2467 | global. No dynamic relocation against resolved undefined weak |
2468 | symbol in executable. */ | |
37e55690 | 2469 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2470 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2471 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2472 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2473 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2474 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2475 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2476 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2477 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2478 | && !resolved_to_zero) | |
67a4f2b7 | 2479 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2480 | && (bfd_link_pic (info) |
ef5aade5 | 2481 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2482 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2483 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2484 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2485 | } |
2486 | else | |
51b64d56 | 2487 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2488 | |
5a15f56f | 2489 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2490 | return TRUE; |
5a15f56f | 2491 | |
0c715baa AM |
2492 | /* In the shared -Bsymbolic case, discard space allocated for |
2493 | dynamic pc-relative relocs against symbols which turn out to be | |
2494 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2495 | space for pc-relative relocs that have become local due to symbol |
2496 | visibility changes. */ | |
0c715baa | 2497 | |
0e1862bb | 2498 | if (bfd_link_pic (info)) |
5a15f56f | 2499 | { |
09695f56 AM |
2500 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2501 | appear on a call or on something like ".long foo - .". We | |
2502 | want calls to protected symbols to resolve directly to the | |
2503 | function rather than going via the plt. If people want | |
2504 | function pointer comparisons to work as expected then they | |
2505 | should avoid writing assembly like ".long foo - .". */ | |
2506 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2507 | { |
e03a8ed8 | 2508 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2509 | |
2510 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2511 | { | |
c3ce498c L |
2512 | p->count -= p->pc_count; |
2513 | p->pc_count = 0; | |
0c715baa AM |
2514 | if (p->count == 0) |
2515 | *pp = p->next; | |
2516 | else | |
2517 | pp = &p->next; | |
2518 | } | |
5a15f56f | 2519 | } |
4e795f50 | 2520 | |
f604c2a2 | 2521 | if (bed->os == is_vxworks) |
3348747a | 2522 | { |
e03a8ed8 | 2523 | struct elf_dyn_relocs **pp; |
3348747a NS |
2524 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2525 | { | |
2526 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2527 | *pp = p->next; | |
2528 | else | |
2529 | pp = &p->next; | |
2530 | } | |
2531 | } | |
2532 | ||
4e795f50 | 2533 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2534 | visibility or in PIE. */ |
22d606e9 | 2535 | if (eh->dyn_relocs != NULL |
c353e543 | 2536 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2537 | { |
aec6b87e L |
2538 | /* Undefined weak symbol is never bound locally in shared |
2539 | library. */ | |
2540 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2541 | || resolved_to_zero) | |
2542 | { | |
2543 | if (h->non_got_ref) | |
2544 | { | |
2545 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2546 | can branch to 0 without PLT. */ | |
2547 | struct elf_dyn_relocs **pp; | |
2548 | ||
2549 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2550 | if (p->pc_count == 0) | |
2551 | *pp = p->next; | |
2552 | else | |
2553 | { | |
2554 | /* Remove non-R_386_PC32 relocation. */ | |
2555 | p->count = p->pc_count; | |
2556 | pp = &p->next; | |
2557 | } | |
22d606e9 | 2558 | |
aec6b87e L |
2559 | if (eh->dyn_relocs != NULL) |
2560 | { | |
2561 | /* Make sure undefined weak symbols are output | |
2562 | as dynamic symbols in PIEs for dynamic non-GOT | |
2563 | non-PLT reloations. */ | |
2564 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2565 | return FALSE; | |
2566 | } | |
2567 | } | |
2568 | else | |
2569 | eh->dyn_relocs = NULL; | |
2570 | } | |
22d606e9 AM |
2571 | else if (h->dynindx == -1 |
2572 | && !h->forced_local) | |
2573 | { | |
2574 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2575 | return FALSE; | |
2576 | } | |
2577 | } | |
0c715baa | 2578 | } |
a23b6845 | 2579 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2580 | { |
2581 | /* For the non-shared case, discard space for relocs against | |
2582 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2583 | dynamic. Keep dynamic relocations for run-time function |
2584 | pointer initialization. */ | |
0c715baa | 2585 | |
aec6b87e L |
2586 | if ((!h->non_got_ref |
2587 | || eh->func_pointer_refcount > 0 | |
2588 | || (h->root.type == bfd_link_hash_undefweak | |
2589 | && !resolved_to_zero)) | |
f5385ebf AM |
2590 | && ((h->def_dynamic |
2591 | && !h->def_regular) | |
ebe50bae | 2592 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2593 | && (h->root.type == bfd_link_hash_undefweak |
2594 | || h->root.type == bfd_link_hash_undefined)))) | |
2595 | { | |
2596 | /* Make sure this symbol is output as a dynamic symbol. | |
2597 | Undefined weak syms won't yet be marked as dynamic. */ | |
2598 | if (h->dynindx == -1 | |
aec6b87e | 2599 | && !h->forced_local |
0dc9a308 L |
2600 | && !resolved_to_zero |
2601 | && h->root.type == bfd_link_hash_undefweak) | |
0c715baa | 2602 | { |
c152c796 | 2603 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2604 | return FALSE; |
0c715baa | 2605 | } |
5a15f56f | 2606 | |
0c715baa AM |
2607 | /* If that succeeded, we know we'll be keeping all the |
2608 | relocs. */ | |
2609 | if (h->dynindx != -1) | |
2610 | goto keep; | |
2611 | } | |
2612 | ||
2613 | eh->dyn_relocs = NULL; | |
04ebc307 | 2614 | eh->func_pointer_refcount = 0; |
0c715baa | 2615 | |
ec338859 | 2616 | keep: ; |
5a15f56f AM |
2617 | } |
2618 | ||
0c715baa AM |
2619 | /* Finally, allocate space. */ |
2620 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2621 | { |
e7c33416 NC |
2622 | asection *sreloc; |
2623 | ||
cbe950e9 | 2624 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2625 | |
2626 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2627 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2628 | } |
2629 | ||
b34976b6 | 2630 | return TRUE; |
6725bdbf AM |
2631 | } |
2632 | ||
c25bc9fc L |
2633 | /* Allocate space in .plt, .got and associated reloc sections for |
2634 | local dynamic relocs. */ | |
2635 | ||
2636 | static bfd_boolean | |
2637 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2638 | { | |
2639 | struct elf_link_hash_entry *h | |
2640 | = (struct elf_link_hash_entry *) *slot; | |
2641 | ||
2642 | if (h->type != STT_GNU_IFUNC | |
2643 | || !h->def_regular | |
2644 | || !h->ref_regular | |
2645 | || !h->forced_local | |
2646 | || h->root.type != bfd_link_hash_defined) | |
2647 | abort (); | |
2648 | ||
2649 | return elf_i386_allocate_dynrelocs (h, inf); | |
2650 | } | |
2651 | ||
c175a657 | 2652 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
2653 | |
2654 | static bfd_boolean | |
02a86693 | 2655 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 2656 | struct bfd_link_info *link_info) |
daa67607 | 2657 | { |
0afcef53 | 2658 | struct elf_x86_link_hash_table *htab; |
daa67607 L |
2659 | Elf_Internal_Shdr *symtab_hdr; |
2660 | Elf_Internal_Rela *internal_relocs; | |
2661 | Elf_Internal_Rela *irel, *irelend; | |
2662 | bfd_byte *contents; | |
c175a657 | 2663 | bfd_boolean changed; |
daa67607 L |
2664 | bfd_signed_vma *local_got_refcounts; |
2665 | ||
2666 | /* Don't even try to convert non-ELF outputs. */ | |
2667 | if (!is_elf_hash_table (link_info->hash)) | |
2668 | return FALSE; | |
2669 | ||
c1d11331 | 2670 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2671 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 2672 | || sec->need_convert_load == 0 |
c8831961 | 2673 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2674 | return TRUE; |
2675 | ||
2676 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2677 | ||
2678 | /* Load the relocations for this section. */ | |
2679 | internal_relocs = (_bfd_elf_link_read_relocs | |
2680 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2681 | link_info->keep_memory)); | |
2682 | if (internal_relocs == NULL) | |
2683 | return FALSE; | |
2684 | ||
c175a657 | 2685 | changed = FALSE; |
0afcef53 | 2686 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
daa67607 L |
2687 | local_got_refcounts = elf_local_got_refcounts (abfd); |
2688 | ||
2689 | /* Get the section contents. */ | |
2690 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2691 | contents = elf_section_data (sec)->this_hdr.contents; | |
2692 | else | |
2693 | { | |
2694 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2695 | goto error_return; | |
2696 | } | |
2697 | ||
2698 | irelend = internal_relocs + sec->reloc_count; | |
2699 | for (irel = internal_relocs; irel < irelend; irel++) | |
2700 | { | |
2701 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 2702 | unsigned int r_symndx; |
daa67607 | 2703 | struct elf_link_hash_entry *h; |
c175a657 | 2704 | bfd_boolean converted; |
daa67607 | 2705 | |
7d4d9709 L |
2706 | /* Don't convert R_386_GOT32 since we can't tell if it is applied |
2707 | to "mov $foo@GOT, %reg" which isn't a load via GOT. */ | |
2708 | if (r_type != R_386_GOT32X) | |
daa67607 L |
2709 | continue; |
2710 | ||
c175a657 | 2711 | r_symndx = ELF32_R_SYM (irel->r_info); |
02a86693 | 2712 | if (r_symndx < symtab_hdr->sh_info) |
0afcef53 L |
2713 | h = _bfd_elf_x86_get_local_sym_hash (htab, sec->owner, |
2714 | (const Elf_Internal_Rela *) irel, | |
2715 | FALSE); | |
c175a657 | 2716 | else |
02a86693 | 2717 | { |
c175a657 L |
2718 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
2719 | while (h->root.type == bfd_link_hash_indirect | |
2720 | || h->root.type == bfd_link_hash_warning) | |
2721 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
daa67607 L |
2722 | } |
2723 | ||
02a86693 | 2724 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
c175a657 | 2725 | if (h != NULL && h->type == STT_GNU_IFUNC) |
02a86693 L |
2726 | continue; |
2727 | ||
c175a657 L |
2728 | converted = FALSE; |
2729 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
2730 | irel, h, &converted, link_info)) | |
2731 | goto error_return; | |
bae420ef | 2732 | |
c175a657 | 2733 | if (converted) |
02a86693 | 2734 | { |
c175a657 L |
2735 | changed = converted; |
2736 | if (h) | |
02a86693 | 2737 | { |
c175a657 L |
2738 | if (h->got.refcount > 0) |
2739 | h->got.refcount -= 1; | |
02a86693 | 2740 | } |
c175a657 | 2741 | else |
02a86693 | 2742 | { |
c175a657 L |
2743 | if (local_got_refcounts != NULL |
2744 | && local_got_refcounts[r_symndx] > 0) | |
2745 | local_got_refcounts[r_symndx] -= 1; | |
02a86693 | 2746 | } |
daa67607 L |
2747 | } |
2748 | } | |
2749 | ||
2750 | if (contents != NULL | |
2751 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2752 | { | |
c175a657 | 2753 | if (!changed && !link_info->keep_memory) |
daa67607 L |
2754 | free (contents); |
2755 | else | |
2756 | { | |
2757 | /* Cache the section contents for elf_link_input_bfd. */ | |
2758 | elf_section_data (sec)->this_hdr.contents = contents; | |
2759 | } | |
2760 | } | |
2761 | ||
2762 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2763 | { | |
c175a657 | 2764 | if (!changed) |
daa67607 L |
2765 | free (internal_relocs); |
2766 | else | |
2767 | elf_section_data (sec)->relocs = internal_relocs; | |
2768 | } | |
2769 | ||
2770 | return TRUE; | |
2771 | ||
2772 | error_return: | |
2773 | if (contents != NULL | |
2774 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2775 | free (contents); | |
2776 | if (internal_relocs != NULL | |
2777 | && elf_section_data (sec)->relocs != internal_relocs) | |
2778 | free (internal_relocs); | |
2779 | return FALSE; | |
2780 | } | |
2781 | ||
252b5132 RH |
2782 | /* Set the sizes of the dynamic sections. */ |
2783 | ||
b34976b6 | 2784 | static bfd_boolean |
23209a78 | 2785 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 2786 | { |
0afcef53 | 2787 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
2788 | bfd *dynobj; |
2789 | asection *s; | |
b34976b6 | 2790 | bfd_boolean relocs; |
0c715baa | 2791 | bfd *ibfd; |
252b5132 | 2792 | |
0afcef53 | 2793 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
2794 | if (htab == NULL) |
2795 | return FALSE; | |
ebe50bae | 2796 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2797 | if (dynobj == NULL) |
2798 | abort (); | |
252b5132 | 2799 | |
0c715baa AM |
2800 | /* Set up .got offsets for local syms, and space for local dynamic |
2801 | relocs. */ | |
c72f2fb2 | 2802 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
2803 | { |
2804 | bfd_signed_vma *local_got; | |
2805 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2806 | char *local_tls_type; |
67a4f2b7 | 2807 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2808 | bfd_size_type locsymcount; |
2809 | Elf_Internal_Shdr *symtab_hdr; | |
2810 | asection *srel; | |
6725bdbf | 2811 | |
0ffa91dd | 2812 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2813 | continue; |
6725bdbf | 2814 | |
0c715baa AM |
2815 | for (s = ibfd->sections; s != NULL; s = s->next) |
2816 | { | |
e03a8ed8 | 2817 | struct elf_dyn_relocs *p; |
0c715baa | 2818 | |
02a86693 | 2819 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
2820 | return FALSE; |
2821 | ||
e03a8ed8 | 2822 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 2823 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
2824 | p != NULL; |
2825 | p = p->next) | |
0c715baa | 2826 | { |
ec338859 AM |
2827 | if (!bfd_is_abs_section (p->sec) |
2828 | && bfd_is_abs_section (p->sec->output_section)) | |
2829 | { | |
2830 | /* Input section has been discarded, either because | |
2831 | it is a copy of a linkonce section or due to | |
2832 | linker script /DISCARD/, so we'll be discarding | |
2833 | the relocs too. */ | |
2834 | } | |
f604c2a2 L |
2835 | else if ((get_elf_i386_backend_data (output_bfd)->os |
2836 | == is_vxworks) | |
3348747a NS |
2837 | && strcmp (p->sec->output_section->name, |
2838 | ".tls_vars") == 0) | |
2839 | { | |
2840 | /* Relocations in vxworks .tls_vars sections are | |
2841 | handled specially by the loader. */ | |
2842 | } | |
248866a8 | 2843 | else if (p->count != 0) |
ec338859 AM |
2844 | { |
2845 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2846 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
2847 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2848 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2849 | { |
2850 | info->flags |= DF_TEXTREL; | |
0e1862bb | 2851 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 2852 | || info->error_textrel) |
695344c0 | 2853 | /* xgettext:c-format */ |
1952c5cd | 2854 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 2855 | p->sec->owner, p->sec); |
b70321a2 | 2856 | } |
ec338859 | 2857 | } |
0c715baa AM |
2858 | } |
2859 | } | |
2860 | ||
2861 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2862 | if (!local_got) |
2863 | continue; | |
6725bdbf | 2864 | |
0ffa91dd | 2865 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2866 | locsymcount = symtab_hdr->sh_info; |
2867 | end_local_got = local_got + locsymcount; | |
0afcef53 L |
2868 | local_tls_type = elf_x86_local_got_tls_type (ibfd); |
2869 | local_tlsdesc_gotent = elf_x86_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2870 | s = htab->elf.sgot; |
2871 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2872 | for (; local_got < end_local_got; |
2873 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2874 | { |
67a4f2b7 | 2875 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2876 | if (*local_got > 0) |
6725bdbf | 2877 | { |
67a4f2b7 AO |
2878 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2879 | { | |
6de2ae4a | 2880 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2881 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2882 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2883 | *local_got = (bfd_vma) -2; |
2884 | } | |
2885 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2886 | || GOT_TLS_GD_P (*local_tls_type)) | |
2887 | { | |
2888 | *local_got = s->size; | |
2889 | s->size += 4; | |
2890 | if (GOT_TLS_GD_P (*local_tls_type) | |
2891 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2892 | s->size += 4; | |
2893 | } | |
0e1862bb | 2894 | if (bfd_link_pic (info) |
67a4f2b7 | 2895 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2896 | || (*local_tls_type & GOT_TLS_IE)) |
2897 | { | |
2898 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2899 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2900 | else if (GOT_TLS_GD_P (*local_tls_type) |
2901 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2902 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2903 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 2904 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 2905 | } |
6725bdbf | 2906 | } |
161d71a6 L |
2907 | else |
2908 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2909 | } |
252b5132 | 2910 | } |
6725bdbf | 2911 | |
0afcef53 | 2912 | if (htab->tls_ld_or_ldm_got.refcount > 0) |
13ae64f3 JJ |
2913 | { |
2914 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2915 | relocs. */ | |
0afcef53 | 2916 | htab->tls_ld_or_ldm_got.offset = htab->elf.sgot->size; |
6de2ae4a L |
2917 | htab->elf.sgot->size += 8; |
2918 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2919 | } |
2920 | else | |
0afcef53 | 2921 | htab->tls_ld_or_ldm_got.offset = -1; |
13ae64f3 | 2922 | |
0c715baa AM |
2923 | /* Allocate global sym .plt and .got entries, and space for global |
2924 | sym dynamic relocs. */ | |
eb4ff4d6 | 2925 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2926 | |
c25bc9fc L |
2927 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2928 | htab_traverse (htab->loc_hash_table, | |
2929 | elf_i386_allocate_local_dynrelocs, | |
2930 | info); | |
2931 | ||
67a4f2b7 AO |
2932 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2933 | incremented. However, when we reserve space for TLS descriptors, | |
2934 | it's not incremented, so in order to compute the space reserved | |
2935 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 2936 | slot size. |
caa0075c | 2937 | |
e1f98742 L |
2938 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
2939 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 2940 | if (htab->elf.srelplt) |
e1f98742 | 2941 | { |
765e526c L |
2942 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; |
2943 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
e1f98742 L |
2944 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; |
2945 | } | |
2946 | else if (htab->elf.irelplt) | |
2947 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2948 | ||
67a4f2b7 | 2949 | |
a7b16ceb L |
2950 | if (htab->elf.sgotplt) |
2951 | { | |
2952 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 2953 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2954 | if ((htab->elf.hgot == NULL |
2955 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2956 | && (htab->elf.sgotplt->size |
2957 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2958 | && (htab->elf.splt == NULL |
2959 | || htab->elf.splt->size == 0) | |
2960 | && (htab->elf.sgot == NULL | |
2961 | || htab->elf.sgot->size == 0) | |
2962 | && (htab->elf.iplt == NULL | |
2963 | || htab->elf.iplt->size == 0) | |
2964 | && (htab->elf.igotplt == NULL | |
2965 | || htab->elf.igotplt->size == 0)) | |
2966 | htab->elf.sgotplt->size = 0; | |
2967 | } | |
2968 | ||
fff53dae L |
2969 | if (_bfd_elf_eh_frame_present (info)) |
2970 | { | |
2971 | if (htab->plt_eh_frame != NULL | |
2972 | && htab->elf.splt != NULL | |
2973 | && htab->elf.splt->size != 0 | |
2974 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
765e526c | 2975 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
2976 | |
2977 | if (htab->plt_got_eh_frame != NULL | |
2978 | && htab->plt_got != NULL | |
2979 | && htab->plt_got->size != 0 | |
2980 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
2981 | htab->plt_got_eh_frame->size | |
765e526c | 2982 | = htab->non_lazy_plt->eh_frame_plt_size; |
ee2fdd6f L |
2983 | |
2984 | /* Unwind info for the second PLT and .plt.got sections are | |
2985 | identical. */ | |
2986 | if (htab->plt_second_eh_frame != NULL | |
2987 | && htab->plt_second != NULL | |
2988 | && htab->plt_second->size != 0 | |
2989 | && !bfd_is_abs_section (htab->plt_second->output_section)) | |
2990 | htab->plt_second_eh_frame->size | |
765e526c | 2991 | = htab->non_lazy_plt->eh_frame_plt_size; |
fff53dae | 2992 | } |
9a2a56cc | 2993 | |
5a15f56f AM |
2994 | /* We now have determined the sizes of the various dynamic sections. |
2995 | Allocate memory for them. */ | |
b34976b6 | 2996 | relocs = FALSE; |
252b5132 RH |
2997 | for (s = dynobj->sections; s != NULL; s = s->next) |
2998 | { | |
eac338cf PB |
2999 | bfd_boolean strip_section = TRUE; |
3000 | ||
252b5132 RH |
3001 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3002 | continue; | |
3003 | ||
6de2ae4a | 3004 | if (s == htab->elf.splt |
9a2a56cc | 3005 | || s == htab->elf.sgot) |
252b5132 | 3006 | { |
6725bdbf AM |
3007 | /* Strip this section if we don't need it; see the |
3008 | comment below. */ | |
eac338cf PB |
3009 | /* We'd like to strip these sections if they aren't needed, but if |
3010 | we've exported dynamic symbols from them we must leave them. | |
3011 | It's too late to tell BFD to get rid of the symbols. */ | |
3012 | ||
7325306f | 3013 | if (htab->elf.hplt != NULL) |
eac338cf | 3014 | strip_section = FALSE; |
252b5132 | 3015 | } |
9a2a56cc AM |
3016 | else if (s == htab->elf.sgotplt |
3017 | || s == htab->elf.iplt | |
3018 | || s == htab->elf.igotplt | |
ee2fdd6f | 3019 | || s == htab->plt_second |
dd7e64d4 | 3020 | || s == htab->plt_got |
9a2a56cc | 3021 | || s == htab->plt_eh_frame |
fff53dae | 3022 | || s == htab->plt_got_eh_frame |
ee2fdd6f | 3023 | || s == htab->plt_second_eh_frame |
5474d94f AM |
3024 | || s == htab->elf.sdynbss |
3025 | || s == htab->elf.sdynrelro) | |
9a2a56cc AM |
3026 | { |
3027 | /* Strip these too. */ | |
3028 | } | |
0112cd26 | 3029 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3030 | { |
6de2ae4a L |
3031 | if (s->size != 0 |
3032 | && s != htab->elf.srelplt | |
765e526c | 3033 | && s != htab->srelplt2) |
b34976b6 | 3034 | relocs = TRUE; |
252b5132 | 3035 | |
0ac8d2ca AM |
3036 | /* We use the reloc_count field as a counter if we need |
3037 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3038 | s->reloc_count = 0; |
252b5132 | 3039 | } |
6725bdbf | 3040 | else |
252b5132 RH |
3041 | { |
3042 | /* It's not one of our sections, so don't allocate space. */ | |
3043 | continue; | |
3044 | } | |
3045 | ||
c456f082 | 3046 | if (s->size == 0) |
252b5132 | 3047 | { |
0ac8d2ca AM |
3048 | /* If we don't need this section, strip it from the |
3049 | output file. This is mostly to handle .rel.bss and | |
3050 | .rel.plt. We must create both sections in | |
3051 | create_dynamic_sections, because they must be created | |
3052 | before the linker maps input sections to output | |
3053 | sections. The linker does that before | |
3054 | adjust_dynamic_symbol is called, and it is that | |
3055 | function which decides whether anything needs to go | |
3056 | into these sections. */ | |
c456f082 AM |
3057 | if (strip_section) |
3058 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3059 | continue; |
3060 | } | |
3061 | ||
c456f082 AM |
3062 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3063 | continue; | |
3064 | ||
f69da49f AM |
3065 | /* Allocate memory for the section contents. We use bfd_zalloc |
3066 | here in case unused entries are not reclaimed before the | |
3067 | section's contents are written out. This should not happen, | |
3068 | but this way if it does, we get a R_386_NONE reloc instead | |
3069 | of garbage. */ | |
a50b1753 | 3070 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3071 | if (s->contents == NULL) |
b34976b6 | 3072 | return FALSE; |
252b5132 RH |
3073 | } |
3074 | ||
e41b3a13 | 3075 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3076 | && htab->plt_eh_frame->contents != NULL) |
3077 | { | |
f129e49f | 3078 | memcpy (htab->plt_eh_frame->contents, |
765e526c | 3079 | htab->plt.eh_frame_plt, |
f129e49f | 3080 | htab->plt_eh_frame->size); |
9a2a56cc AM |
3081 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3082 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3083 | } | |
e41b3a13 | 3084 | |
fff53dae L |
3085 | if (htab->plt_got_eh_frame != NULL |
3086 | && htab->plt_got_eh_frame->contents != NULL) | |
3087 | { | |
3088 | memcpy (htab->plt_got_eh_frame->contents, | |
765e526c | 3089 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
3090 | htab->plt_got_eh_frame->size); |
3091 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3092 | (htab->plt_got_eh_frame->contents | |
3093 | + PLT_FDE_LEN_OFFSET)); | |
3094 | } | |
3095 | ||
ee2fdd6f L |
3096 | if (htab->plt_second_eh_frame != NULL |
3097 | && htab->plt_second_eh_frame->contents != NULL) | |
3098 | { | |
3099 | memcpy (htab->plt_second_eh_frame->contents, | |
765e526c | 3100 | htab->non_lazy_plt->eh_frame_plt, |
ee2fdd6f L |
3101 | htab->plt_second_eh_frame->size); |
3102 | bfd_put_32 (dynobj, htab->plt_second->size, | |
3103 | (htab->plt_second_eh_frame->contents | |
3104 | + PLT_FDE_LEN_OFFSET)); | |
3105 | } | |
3106 | ||
ebe50bae | 3107 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3108 | { |
3109 | /* Add some entries to the .dynamic section. We fill in the | |
3110 | values later, in elf_i386_finish_dynamic_sections, but we | |
3111 | must add the entries now so that we get the correct size for | |
3112 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3113 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3114 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3115 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3116 | |
0e1862bb | 3117 | if (bfd_link_executable (info)) |
252b5132 | 3118 | { |
dc810e39 | 3119 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3120 | return FALSE; |
252b5132 RH |
3121 | } |
3122 | ||
6de2ae4a | 3123 | if (htab->elf.splt->size != 0) |
252b5132 | 3124 | { |
7c1e8d3e L |
3125 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3126 | relocation. */ | |
3127 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3128 | return FALSE; |
97d343d4 | 3129 | } |
7c1e8d3e | 3130 | |
97d343d4 L |
3131 | if (htab->elf.srelplt->size != 0) |
3132 | { | |
3133 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3134 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3135 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3136 | return FALSE; | |
252b5132 RH |
3137 | } |
3138 | ||
3139 | if (relocs) | |
3140 | { | |
dc810e39 AM |
3141 | if (!add_dynamic_entry (DT_REL, 0) |
3142 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3143 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3144 | return FALSE; |
252b5132 | 3145 | |
0c715baa AM |
3146 | /* If any dynamic relocs apply to a read-only section, |
3147 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3148 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 | 3149 | elf_link_hash_traverse (&htab->elf, |
0afcef53 L |
3150 | _bfd_x86_elf_readonly_dynrelocs, |
3151 | info); | |
0c715baa AM |
3152 | |
3153 | if ((info->flags & DF_TEXTREL) != 0) | |
3154 | { | |
2df3368d | 3155 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3156 | { |
3157 | info->callbacks->einfo | |
3158 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3159 | bfd_set_error (bfd_error_bad_value); | |
3160 | return FALSE; | |
3161 | } | |
3162 | ||
0c715baa | 3163 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3164 | return FALSE; |
0c715baa | 3165 | } |
252b5132 | 3166 | } |
f604c2a2 | 3167 | if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks |
7a2b07ff NS |
3168 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3169 | return FALSE; | |
252b5132 | 3170 | } |
dc810e39 | 3171 | #undef add_dynamic_entry |
252b5132 | 3172 | |
b34976b6 | 3173 | return TRUE; |
252b5132 RH |
3174 | } |
3175 | ||
38701953 AM |
3176 | /* Set the correct type for an x86 ELF section. We do this by the |
3177 | section name, which is a hack, but ought to work. */ | |
3178 | ||
b34976b6 | 3179 | static bfd_boolean |
55fd94b0 AM |
3180 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3181 | Elf_Internal_Shdr *hdr, | |
3182 | asection *sec) | |
38701953 | 3183 | { |
91d6fa6a | 3184 | const char *name; |
38701953 AM |
3185 | |
3186 | name = bfd_get_section_name (abfd, sec); | |
3187 | ||
3188 | /* This is an ugly, but unfortunately necessary hack that is | |
3189 | needed when producing EFI binaries on x86. It tells | |
3190 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3191 | containing ELF relocation info. We need this hack in order to | |
3192 | be able to generate ELF binaries that can be translated into | |
3193 | EFI applications (which are essentially COFF objects). Those | |
3194 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3195 | which would normally cause BFD to segfault because it would | |
3196 | attempt to interpret this section as containing relocation | |
3197 | entries for section "oc". With this hack enabled, ".reloc" | |
3198 | will be treated as a normal data section, which will avoid the | |
3199 | segfault. However, you won't be able to create an ELFNN binary | |
3200 | with a section named "oc" that needs relocations, but that's | |
3201 | the kind of ugly side-effects you get when detecting section | |
3202 | types based on their names... In practice, this limitation is | |
3203 | unlikely to bite. */ | |
3204 | if (strcmp (name, ".reloc") == 0) | |
3205 | hdr->sh_type = SHT_PROGBITS; | |
3206 | ||
b34976b6 | 3207 | return TRUE; |
38701953 AM |
3208 | } |
3209 | ||
13ae64f3 JJ |
3210 | /* Return the relocation value for @tpoff relocation |
3211 | if STT_TLS virtual address is ADDRESS. */ | |
3212 | ||
3213 | static bfd_vma | |
eb4ff4d6 | 3214 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3215 | { |
e1918d23 | 3216 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3217 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3218 | bfd_vma static_tls_size; | |
13ae64f3 | 3219 | |
e1918d23 AM |
3220 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3221 | if (htab->tls_sec == NULL) | |
6a30718d | 3222 | return 0; |
7dc98aea RO |
3223 | |
3224 | /* Consider special static TLS alignment requirements. */ | |
3225 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3226 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3227 | } |
3228 | ||
252b5132 RH |
3229 | /* Relocate an i386 ELF section. */ |
3230 | ||
b34976b6 | 3231 | static bfd_boolean |
55fd94b0 AM |
3232 | elf_i386_relocate_section (bfd *output_bfd, |
3233 | struct bfd_link_info *info, | |
3234 | bfd *input_bfd, | |
3235 | asection *input_section, | |
3236 | bfd_byte *contents, | |
3237 | Elf_Internal_Rela *relocs, | |
3238 | Elf_Internal_Sym *local_syms, | |
3239 | asection **local_sections) | |
252b5132 | 3240 | { |
0afcef53 | 3241 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
3242 | Elf_Internal_Shdr *symtab_hdr; |
3243 | struct elf_link_hash_entry **sym_hashes; | |
3244 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3245 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3246 | Elf_Internal_Rela *rel; |
60f2e42e | 3247 | Elf_Internal_Rela *wrel; |
252b5132 | 3248 | Elf_Internal_Rela *relend; |
3348747a | 3249 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3250 | unsigned plt_entry_size; |
252b5132 | 3251 | |
0ffa91dd | 3252 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3253 | |
c337a162 L |
3254 | /* Skip if check_relocs failed. */ |
3255 | if (input_section->check_relocs_failed) | |
3256 | return FALSE; | |
3257 | ||
0afcef53 | 3258 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
3259 | if (htab == NULL) |
3260 | return FALSE; | |
0ffa91dd | 3261 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3262 | sym_hashes = elf_sym_hashes (input_bfd); |
3263 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 3264 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3265 | /* We have to handle relocations in vxworks .tls_vars sections |
3266 | specially, because the dynamic loader is 'weird'. */ | |
f604c2a2 L |
3267 | is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os |
3268 | == is_vxworks) | |
0e1862bb | 3269 | && bfd_link_pic (info) |
3348747a NS |
3270 | && !strcmp (input_section->output_section->name, |
3271 | ".tls_vars")); | |
252b5132 | 3272 | |
0afcef53 | 3273 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 3274 | |
765e526c | 3275 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3276 | |
60f2e42e | 3277 | rel = wrel = relocs; |
252b5132 | 3278 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3279 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3280 | { |
13ae64f3 | 3281 | unsigned int r_type; |
252b5132 RH |
3282 | reloc_howto_type *howto; |
3283 | unsigned long r_symndx; | |
3284 | struct elf_link_hash_entry *h; | |
0afcef53 | 3285 | struct elf_x86_link_hash_entry *eh; |
252b5132 RH |
3286 | Elf_Internal_Sym *sym; |
3287 | asection *sec; | |
dd7e64d4 | 3288 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3289 | bfd_vma relocation; |
b34976b6 | 3290 | bfd_boolean unresolved_reloc; |
252b5132 | 3291 | bfd_reloc_status_type r; |
1b452ec6 | 3292 | unsigned int indx; |
13ae64f3 | 3293 | int tls_type; |
1788fc08 | 3294 | bfd_vma st_size; |
dd7e64d4 | 3295 | asection *resolved_plt; |
aec6b87e | 3296 | bfd_boolean resolved_to_zero; |
e133d005 | 3297 | bfd_boolean relative_reloc; |
252b5132 RH |
3298 | |
3299 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3300 | if (r_type == R_386_GNU_VTINHERIT |
3301 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3302 | { |
3303 | if (wrel != rel) | |
3304 | *wrel = *rel; | |
3305 | continue; | |
3306 | } | |
dc47f327 | 3307 | |
55fd94b0 | 3308 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3309 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3310 | >= R_386_ext - R_386_standard) | |
3311 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3312 | >= R_386_ext2 - R_386_ext)) |
47aeb64c NC |
3313 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
3314 | ||
1b452ec6 | 3315 | howto = elf_howto_table + indx; |
252b5132 RH |
3316 | |
3317 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3318 | h = NULL; |
3319 | sym = NULL; | |
3320 | sec = NULL; | |
b34976b6 | 3321 | unresolved_reloc = FALSE; |
252b5132 RH |
3322 | if (r_symndx < symtab_hdr->sh_info) |
3323 | { | |
3324 | sym = local_syms + r_symndx; | |
3325 | sec = local_sections[r_symndx]; | |
3326 | relocation = (sec->output_section->vma | |
3327 | + sec->output_offset | |
3328 | + sym->st_value); | |
1788fc08 | 3329 | st_size = sym->st_size; |
ab96bf03 AM |
3330 | |
3331 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3332 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3333 | || (bfd_link_relocatable (info) |
ab96bf03 | 3334 | && sec->output_offset != 0))) |
f8df10f4 | 3335 | { |
f8df10f4 | 3336 | bfd_vma addend; |
4a335f3d | 3337 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3338 | |
4a335f3d | 3339 | switch (howto->size) |
f8df10f4 | 3340 | { |
4a335f3d AM |
3341 | case 0: |
3342 | addend = bfd_get_8 (input_bfd, where); | |
3343 | if (howto->pc_relative) | |
3344 | { | |
3345 | addend = (addend ^ 0x80) - 0x80; | |
3346 | addend += 1; | |
3347 | } | |
3348 | break; | |
3349 | case 1: | |
3350 | addend = bfd_get_16 (input_bfd, where); | |
3351 | if (howto->pc_relative) | |
3352 | { | |
3353 | addend = (addend ^ 0x8000) - 0x8000; | |
3354 | addend += 2; | |
3355 | } | |
3356 | break; | |
3357 | case 2: | |
3358 | addend = bfd_get_32 (input_bfd, where); | |
3359 | if (howto->pc_relative) | |
3360 | { | |
3361 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3362 | addend += 4; | |
3363 | } | |
3364 | break; | |
3365 | default: | |
3366 | abort (); | |
f8df10f4 JJ |
3367 | } |
3368 | ||
0e1862bb | 3369 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3370 | addend += sec->output_offset; |
3371 | else | |
3372 | { | |
3373 | asection *msec = sec; | |
3374 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3375 | addend); | |
3376 | addend -= relocation; | |
3377 | addend += msec->output_section->vma + msec->output_offset; | |
3378 | } | |
4a335f3d AM |
3379 | |
3380 | switch (howto->size) | |
3381 | { | |
3382 | case 0: | |
16a10388 | 3383 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3384 | if (howto->pc_relative) |
3385 | addend -= 1; | |
3386 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3387 | break; |
3388 | case 1: | |
3389 | if (howto->pc_relative) | |
3390 | addend -= 2; | |
3391 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3392 | break; |
3393 | case 2: | |
3394 | if (howto->pc_relative) | |
3395 | addend -= 4; | |
3396 | bfd_put_32 (input_bfd, addend, where); | |
3397 | break; | |
3398 | } | |
f8df10f4 | 3399 | } |
0e1862bb | 3400 | else if (!bfd_link_relocatable (info) |
1f85278f | 3401 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3402 | { |
3403 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0afcef53 L |
3404 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel, |
3405 | FALSE); | |
c25bc9fc L |
3406 | if (h == NULL) |
3407 | abort (); | |
3408 | ||
23209a78 | 3409 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3410 | h->root.u.def.value = sym->st_value; |
3411 | h->root.u.def.section = sec; | |
3412 | } | |
252b5132 RH |
3413 | } |
3414 | else | |
3415 | { | |
3d540e93 | 3416 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3417 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3418 | |
b2a8e766 AM |
3419 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3420 | r_symndx, symtab_hdr, sym_hashes, | |
3421 | h, sec, relocation, | |
62d887d4 | 3422 | unresolved_reloc, warned, ignored); |
1788fc08 | 3423 | st_size = h->size; |
252b5132 RH |
3424 | } |
3425 | ||
dbaa2011 | 3426 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3427 | { |
3428 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3429 | contents + rel->r_offset); | |
3430 | wrel->r_offset = rel->r_offset; | |
3431 | wrel->r_info = 0; | |
3432 | wrel->r_addend = 0; | |
3433 | ||
3434 | /* For ld -r, remove relocations in debug sections against | |
3435 | sections defined in discarded sections. Not done for | |
3436 | eh_frame editing code expects to be present. */ | |
3437 | if (bfd_link_relocatable (info) | |
3438 | && (input_section->flags & SEC_DEBUGGING)) | |
3439 | wrel--; | |
3440 | ||
3441 | continue; | |
3442 | } | |
9635fe29 | 3443 | |
0e1862bb | 3444 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3445 | { |
3446 | if (wrel != rel) | |
3447 | *wrel = *rel; | |
3448 | continue; | |
3449 | } | |
ab96bf03 | 3450 | |
0afcef53 | 3451 | eh = (struct elf_x86_link_hash_entry *) h; |
ee2fdd6f | 3452 | |
cbe950e9 L |
3453 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3454 | it here if it is defined in a non-shared object. */ | |
3455 | if (h != NULL | |
3456 | && h->type == STT_GNU_IFUNC | |
3457 | && h->def_regular) | |
3458 | { | |
ee2fdd6f | 3459 | asection *gotplt, *base_got; |
cbe950e9 | 3460 | bfd_vma plt_index; |
4c544807 | 3461 | const char *name; |
cbe950e9 | 3462 | |
97dc35c8 L |
3463 | if ((input_section->flags & SEC_ALLOC) == 0) |
3464 | { | |
3465 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3466 | sections because such sections are not SEC_ALLOC and | |
3467 | thus ld.so will not process them. */ | |
3468 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3469 | continue; |
97dc35c8 L |
3470 | abort (); |
3471 | } | |
cbe950e9 L |
3472 | |
3473 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3474 | if (htab->elf.splt != NULL) |
cbe950e9 | 3475 | { |
ee2fdd6f L |
3476 | if (htab->plt_second != NULL) |
3477 | { | |
3478 | resolved_plt = htab->plt_second; | |
3479 | plt_offset = eh->plt_second.offset; | |
3480 | } | |
3481 | else | |
3482 | { | |
3483 | resolved_plt = htab->elf.splt; | |
3484 | plt_offset = h->plt.offset; | |
3485 | } | |
6de2ae4a | 3486 | gotplt = htab->elf.sgotplt; |
cbe950e9 L |
3487 | } |
3488 | else | |
3489 | { | |
ee2fdd6f L |
3490 | resolved_plt = htab->elf.iplt; |
3491 | plt_offset = h->plt.offset; | |
6de2ae4a | 3492 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
3493 | } |
3494 | ||
cbe950e9 L |
3495 | switch (r_type) |
3496 | { | |
3497 | default: | |
233cc9c1 | 3498 | break; |
cbe950e9 L |
3499 | |
3500 | case R_386_GOT32: | |
02a86693 | 3501 | case R_386_GOT32X: |
6de2ae4a | 3502 | base_got = htab->elf.sgot; |
cbe950e9 L |
3503 | off = h->got.offset; |
3504 | ||
7afd84dc | 3505 | if (base_got == NULL) |
cbe950e9 L |
3506 | abort (); |
3507 | ||
7afd84dc | 3508 | if (off == (bfd_vma) -1) |
cbe950e9 | 3509 | { |
7afd84dc L |
3510 | /* We can't use h->got.offset here to save state, or |
3511 | even just remember the offset, as finish_dynamic_symbol | |
3512 | would use that as offset into .got. */ | |
6bbec505 | 3513 | |
233cc9c1 L |
3514 | if (h->plt.offset == (bfd_vma) -1) |
3515 | abort (); | |
3516 | ||
6de2ae4a | 3517 | if (htab->elf.splt != NULL) |
7afd84dc | 3518 | { |
f604c2a2 | 3519 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 3520 | - htab->plt.has_plt0); |
7afd84dc | 3521 | off = (plt_index + 3) * 4; |
6de2ae4a | 3522 | base_got = htab->elf.sgotplt; |
7afd84dc | 3523 | } |
cbe950e9 L |
3524 | else |
3525 | { | |
25e762b9 | 3526 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3527 | off = plt_index * 4; |
6de2ae4a | 3528 | base_got = htab->elf.igotplt; |
7afd84dc L |
3529 | } |
3530 | ||
3531 | if (h->dynindx == -1 | |
3532 | || h->forced_local | |
3533 | || info->symbolic) | |
3534 | { | |
3535 | /* This references the local defitionion. We must | |
3536 | initialize this entry in the global offset table. | |
3537 | Since the offset must always be a multiple of 8, | |
3538 | we use the least significant bit to record | |
3539 | whether we have initialized it already. | |
3540 | ||
3541 | When doing a dynamic link, we create a .rela.got | |
3542 | relocation entry to initialize the value. This | |
3543 | is done in the finish_dynamic_symbol routine. */ | |
3544 | if ((off & 1) != 0) | |
3545 | off &= ~1; | |
3546 | else | |
3547 | { | |
3548 | bfd_put_32 (output_bfd, relocation, | |
3549 | base_got->contents + off); | |
3550 | h->got.offset |= 1; | |
3551 | } | |
cbe950e9 | 3552 | } |
cbe950e9 | 3553 | |
7afd84dc | 3554 | relocation = off; |
7afd84dc L |
3555 | } |
3556 | else | |
ca8c86ef L |
3557 | relocation = (base_got->output_section->vma |
3558 | + base_got->output_offset + off | |
3559 | - gotplt->output_section->vma | |
3560 | - gotplt->output_offset); | |
3561 | ||
2a568401 L |
3562 | if (rel->r_offset > 1 |
3563 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
3564 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
3565 | { |
3566 | if (bfd_link_pic (info)) | |
3567 | goto disallow_got32; | |
3568 | ||
3569 | /* Add the GOT base if there is no base register. */ | |
3570 | relocation += (gotplt->output_section->vma | |
3571 | + gotplt->output_offset); | |
3572 | } | |
3573 | else if (htab->elf.splt == NULL) | |
3574 | { | |
3575 | /* Adjust for static executables. */ | |
3576 | relocation += gotplt->output_offset; | |
3577 | } | |
0018b0a3 | 3578 | |
cbe950e9 | 3579 | goto do_relocation; |
233cc9c1 L |
3580 | } |
3581 | ||
3582 | if (h->plt.offset == (bfd_vma) -1) | |
3583 | { | |
3584 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
3585 | if (r_type == R_386_32 | |
3586 | && (input_section->flags & SEC_CODE) == 0) | |
3587 | goto do_ifunc_pointer; | |
3588 | goto bad_ifunc_reloc; | |
3589 | } | |
3590 | ||
ee2fdd6f L |
3591 | relocation = (resolved_plt->output_section->vma |
3592 | + resolved_plt->output_offset + plt_offset); | |
233cc9c1 L |
3593 | |
3594 | switch (r_type) | |
3595 | { | |
3596 | default: | |
3597 | bad_ifunc_reloc: | |
3598 | if (h->root.root.string) | |
3599 | name = h->root.root.string; | |
3600 | else | |
3601 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3602 | NULL); | |
4eca0228 | 3603 | _bfd_error_handler |
695344c0 | 3604 | /* xgettext:c-format */ |
233cc9c1 L |
3605 | (_("%B: relocation %s against STT_GNU_IFUNC " |
3606 | "symbol `%s' isn't supported"), input_bfd, | |
3607 | howto->name, name); | |
3608 | bfd_set_error (bfd_error_bad_value); | |
3609 | return FALSE; | |
3610 | ||
3611 | case R_386_32: | |
3612 | /* Generate dynamic relcoation only when there is a | |
3613 | non-GOT reference in a shared object. */ | |
3614 | if ((bfd_link_pic (info) && h->non_got_ref) | |
3615 | || h->plt.offset == (bfd_vma) -1) | |
3616 | { | |
3617 | Elf_Internal_Rela outrel; | |
3618 | asection *sreloc; | |
3619 | bfd_vma offset; | |
3620 | ||
3621 | do_ifunc_pointer: | |
3622 | /* Need a dynamic relocation to get the real function | |
3623 | adddress. */ | |
3624 | offset = _bfd_elf_section_offset (output_bfd, | |
3625 | info, | |
3626 | input_section, | |
3627 | rel->r_offset); | |
3628 | if (offset == (bfd_vma) -1 | |
3629 | || offset == (bfd_vma) -2) | |
3630 | abort (); | |
3631 | ||
3632 | outrel.r_offset = (input_section->output_section->vma | |
3633 | + input_section->output_offset | |
3634 | + offset); | |
3635 | ||
3636 | if (h->dynindx == -1 | |
3637 | || h->forced_local | |
3638 | || bfd_link_executable (info)) | |
3639 | { | |
6322e5c5 L |
3640 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3641 | h->root.root.string, | |
3642 | h->root.u.def.section->owner); | |
3643 | ||
233cc9c1 L |
3644 | /* This symbol is resolved locally. */ |
3645 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3646 | bfd_put_32 (output_bfd, | |
3647 | (h->root.u.def.value | |
3648 | + h->root.u.def.section->output_section->vma | |
3649 | + h->root.u.def.section->output_offset), | |
3650 | contents + offset); | |
3651 | } | |
3652 | else | |
3653 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
3654 | ||
3655 | /* Dynamic relocations are stored in | |
3656 | 1. .rel.ifunc section in PIC object. | |
3657 | 2. .rel.got section in dynamic executable. | |
3658 | 3. .rel.iplt section in static executable. */ | |
3659 | if (bfd_link_pic (info)) | |
3660 | sreloc = htab->elf.irelifunc; | |
3661 | else if (htab->elf.splt != NULL) | |
3662 | sreloc = htab->elf.srelgot; | |
3663 | else | |
3664 | sreloc = htab->elf.irelplt; | |
3665 | elf_append_rel (output_bfd, sreloc, &outrel); | |
3666 | ||
3667 | /* If this reloc is against an external symbol, we | |
3668 | do not want to fiddle with the addend. Otherwise, | |
3669 | we need to include the symbol value so that it | |
3670 | becomes an addend for the dynamic reloc. For an | |
3671 | internal symbol, we have updated addend. */ | |
3672 | continue; | |
3673 | } | |
3674 | /* FALLTHROUGH */ | |
3675 | case R_386_PC32: | |
3676 | case R_386_PLT32: | |
3677 | goto do_relocation; | |
cbe950e9 L |
3678 | |
3679 | case R_386_GOTOFF: | |
3680 | relocation -= (gotplt->output_section->vma | |
3681 | + gotplt->output_offset); | |
3682 | goto do_relocation; | |
3683 | } | |
3684 | } | |
3685 | ||
aec6b87e | 3686 | resolved_to_zero = (eh != NULL |
e62b9723 | 3687 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
0afcef53 | 3688 | I386_ELF_DATA, |
e62b9723 L |
3689 | eh->has_got_reloc, |
3690 | eh)); | |
aec6b87e | 3691 | |
252b5132 RH |
3692 | switch (r_type) |
3693 | { | |
02a86693 L |
3694 | case R_386_GOT32X: |
3695 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
3696 | link-time address. */ | |
3697 | if (h == htab->elf.hdynamic) | |
3698 | goto r_386_got32; | |
3699 | ||
3700 | if (bfd_link_pic (info)) | |
3701 | { | |
3702 | /* It is OK to convert mov to lea and convert indirect | |
3703 | branch to direct branch. It is OK to convert adc, | |
3704 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
3705 | is false. */ | |
02e2aef8 L |
3706 | unsigned int opcode, addend; |
3707 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
3708 | if (addend != 0) | |
3709 | goto r_386_got32; | |
3710 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
3711 | if (opcode != 0x8b && opcode != 0xff) |
3712 | goto r_386_got32; | |
3713 | } | |
3714 | ||
3715 | /* Resolve "mov GOT[(%reg)], %reg", | |
3716 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
3717 | and "binop foo@GOT[(%reg)], %reg". */ | |
3718 | if (h == NULL | |
3719 | || (h->plt.offset == (bfd_vma) -1 | |
3720 | && h->got.offset == (bfd_vma) -1) | |
3721 | || htab->elf.sgotplt == NULL) | |
3722 | abort (); | |
3723 | ||
3724 | offplt = (htab->elf.sgotplt->output_section->vma | |
3725 | + htab->elf.sgotplt->output_offset); | |
3726 | ||
3727 | /* It is relative to .got.plt section. */ | |
3728 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
3729 | /* Use GOT entry. Mask off the least significant bit in |
3730 | GOT offset which may be set by R_386_GOT32 processing | |
3731 | below. */ | |
02a86693 L |
3732 | relocation = (htab->elf.sgot->output_section->vma |
3733 | + htab->elf.sgot->output_offset | |
32875eb1 | 3734 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
3735 | else |
3736 | /* Use GOTPLT entry. */ | |
f604c2a2 | 3737 | relocation = (h->plt.offset / plt_entry_size |
765e526c | 3738 | - htab->plt.has_plt0 + 3) * 4; |
02a86693 L |
3739 | |
3740 | if (!bfd_link_pic (info)) | |
3741 | { | |
3742 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 3743 | baseless addressing. */ |
02a86693 | 3744 | unsigned int modrm; |
02e2aef8 | 3745 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
3746 | if ((modrm & 0xc7) == 0x5) |
3747 | relocation += offplt; | |
3748 | } | |
3749 | ||
3750 | unresolved_reloc = FALSE; | |
3751 | break; | |
3752 | ||
252b5132 | 3753 | case R_386_GOT32: |
02a86693 | 3754 | r_386_got32: |
252b5132 RH |
3755 | /* Relocation is to the entry for this symbol in the global |
3756 | offset table. */ | |
6de2ae4a | 3757 | if (htab->elf.sgot == NULL) |
ffb2e45b | 3758 | abort (); |
252b5132 | 3759 | |
e133d005 | 3760 | relative_reloc = FALSE; |
252b5132 RH |
3761 | if (h != NULL) |
3762 | { | |
b34976b6 | 3763 | bfd_boolean dyn; |
252b5132 RH |
3764 | |
3765 | off = h->got.offset; | |
ebe50bae | 3766 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
3767 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
3768 | bfd_link_pic (info), | |
3769 | h) | |
3770 | || (bfd_link_pic (info) | |
586119b3 | 3771 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3772 | || (ELF_ST_VISIBILITY (h->other) |
3773 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3774 | { |
3775 | /* This is actually a static link, or it is a | |
3776 | -Bsymbolic link and the symbol is defined | |
3777 | locally, or the symbol was forced to be local | |
3778 | because of a version file. We must initialize | |
3779 | this entry in the global offset table. Since the | |
3780 | offset must always be a multiple of 4, we use the | |
3781 | least significant bit to record whether we have | |
3782 | initialized it already. | |
3783 | ||
3784 | When doing a dynamic link, we create a .rel.got | |
3785 | relocation entry to initialize the value. This | |
3786 | is done in the finish_dynamic_symbol routine. */ | |
3787 | if ((off & 1) != 0) | |
3788 | off &= ~1; | |
3789 | else | |
3790 | { | |
3791 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 3792 | htab->elf.sgot->contents + off); |
252b5132 | 3793 | h->got.offset |= 1; |
e133d005 L |
3794 | |
3795 | if (h->dynindx == -1 | |
3796 | && !h->forced_local | |
3797 | && h->root.type != bfd_link_hash_undefweak | |
0dc9a308 | 3798 | && bfd_link_pic (info)) |
e133d005 L |
3799 | { |
3800 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 3801 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 L |
3802 | eh->no_finish_dynamic_symbol = 1; |
3803 | relative_reloc = TRUE; | |
3804 | } | |
252b5132 RH |
3805 | } |
3806 | } | |
8c694914 | 3807 | else |
b34976b6 | 3808 | unresolved_reloc = FALSE; |
252b5132 RH |
3809 | } |
3810 | else | |
3811 | { | |
ffb2e45b AM |
3812 | if (local_got_offsets == NULL) |
3813 | abort (); | |
252b5132 RH |
3814 | |
3815 | off = local_got_offsets[r_symndx]; | |
3816 | ||
3817 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3818 | the least significant bit to record whether we have |
3819 | already generated the necessary reloc. */ | |
252b5132 RH |
3820 | if ((off & 1) != 0) |
3821 | off &= ~1; | |
3822 | else | |
3823 | { | |
6725bdbf | 3824 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 3825 | htab->elf.sgot->contents + off); |
e133d005 | 3826 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 3827 | |
0e1862bb | 3828 | if (bfd_link_pic (info)) |
e133d005 | 3829 | relative_reloc = TRUE; |
252b5132 | 3830 | } |
252b5132 RH |
3831 | } |
3832 | ||
e133d005 L |
3833 | if (relative_reloc) |
3834 | { | |
3835 | asection *s; | |
3836 | Elf_Internal_Rela outrel; | |
3837 | ||
3838 | s = htab->elf.srelgot; | |
3839 | if (s == NULL) | |
3840 | abort (); | |
3841 | ||
3842 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
3843 | + htab->elf.sgot->output_offset | |
3844 | + off); | |
3845 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3846 | elf_append_rel (output_bfd, s, &outrel); | |
3847 | } | |
3848 | ||
ffb2e45b AM |
3849 | if (off >= (bfd_vma) -2) |
3850 | abort (); | |
3851 | ||
74d7f0aa L |
3852 | relocation = (htab->elf.sgot->output_section->vma |
3853 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
3854 | if (rel->r_offset > 1 |
3855 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
3856 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
3857 | { |
3858 | if (bfd_link_pic (info)) | |
3859 | { | |
3860 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
3861 | register, except for "lea foo@GOT, %reg", since |
3862 | we don't know what the GOT base is. */ | |
74d7f0aa L |
3863 | const char *name; |
3864 | ||
712ec279 | 3865 | disallow_got32: |
a5def14f | 3866 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
3867 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
3868 | NULL); | |
3869 | else | |
3870 | name = h->root.root.string; | |
3871 | ||
4eca0228 | 3872 | _bfd_error_handler |
695344c0 | 3873 | /* xgettext:c-format */ |
63a5468a AM |
3874 | (_("%B: direct GOT relocation %s against `%s'" |
3875 | " without base register can not be used" | |
3876 | " when making a shared object"), | |
712ec279 | 3877 | input_bfd, howto->name, name); |
74d7f0aa L |
3878 | bfd_set_error (bfd_error_bad_value); |
3879 | return FALSE; | |
3880 | } | |
3881 | } | |
3882 | else | |
3883 | { | |
3884 | /* Subtract the .got.plt section address only with a base | |
3885 | register. */ | |
3886 | relocation -= (htab->elf.sgotplt->output_section->vma | |
3887 | + htab->elf.sgotplt->output_offset); | |
3888 | } | |
3889 | ||
252b5132 RH |
3890 | break; |
3891 | ||
3892 | case R_386_GOTOFF: | |
3893 | /* Relocation is relative to the start of the global offset | |
3894 | table. */ | |
3895 | ||
3d949995 L |
3896 | /* Check to make sure it isn't a protected function or data |
3897 | symbol for shared library since it may not be local when | |
3898 | used as function address or with copy relocation. We also | |
e3c0e327 | 3899 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 3900 | if (!bfd_link_executable (info) && h) |
90f487df | 3901 | { |
41bed6dd L |
3902 | if (!h->def_regular) |
3903 | { | |
3904 | const char *v; | |
3905 | ||
3906 | switch (ELF_ST_VISIBILITY (h->other)) | |
3907 | { | |
3908 | case STV_HIDDEN: | |
3909 | v = _("hidden symbol"); | |
3910 | break; | |
3911 | case STV_INTERNAL: | |
3912 | v = _("internal symbol"); | |
3913 | break; | |
3914 | case STV_PROTECTED: | |
3915 | v = _("protected symbol"); | |
3916 | break; | |
3917 | default: | |
3918 | v = _("symbol"); | |
3919 | break; | |
3920 | } | |
3921 | ||
4eca0228 | 3922 | _bfd_error_handler |
695344c0 | 3923 | /* xgettext:c-format */ |
63a5468a AM |
3924 | (_("%B: relocation R_386_GOTOFF against undefined %s" |
3925 | " `%s' can not be used when making a shared object"), | |
41bed6dd L |
3926 | input_bfd, v, h->root.root.string); |
3927 | bfd_set_error (bfd_error_bad_value); | |
3928 | return FALSE; | |
3929 | } | |
d5597ebc | 3930 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
3931 | && (h->type == STT_FUNC |
3932 | || h->type == STT_OBJECT) | |
41bed6dd L |
3933 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
3934 | { | |
4eca0228 | 3935 | _bfd_error_handler |
695344c0 | 3936 | /* xgettext:c-format */ |
63a5468a AM |
3937 | (_("%B: relocation R_386_GOTOFF against protected %s" |
3938 | " `%s' can not be used when making a shared object"), | |
3d949995 L |
3939 | input_bfd, |
3940 | h->type == STT_FUNC ? "function" : "data", | |
3941 | h->root.root.string); | |
41bed6dd L |
3942 | bfd_set_error (bfd_error_bad_value); |
3943 | return FALSE; | |
3944 | } | |
90f487df L |
3945 | } |
3946 | ||
8c37241b JJ |
3947 | /* Note that sgot is not involved in this |
3948 | calculation. We always want the start of .got.plt. If we | |
3949 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3950 | permitted by the ABI, we might have to change this |
3951 | calculation. */ | |
6de2ae4a L |
3952 | relocation -= htab->elf.sgotplt->output_section->vma |
3953 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3954 | break; |
3955 | ||
3956 | case R_386_GOTPC: | |
3957 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
3958 | relocation = htab->elf.sgotplt->output_section->vma |
3959 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 3960 | unresolved_reloc = FALSE; |
252b5132 RH |
3961 | break; |
3962 | ||
3963 | case R_386_PLT32: | |
3964 | /* Relocation is to the entry for this symbol in the | |
3965 | procedure linkage table. */ | |
3966 | ||
dd5724d5 | 3967 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3968 | without using the procedure linkage table. */ |
252b5132 RH |
3969 | if (h == NULL) |
3970 | break; | |
3971 | ||
dd7e64d4 L |
3972 | if ((h->plt.offset == (bfd_vma) -1 |
3973 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3974 | || htab->elf.splt == NULL) |
252b5132 RH |
3975 | { |
3976 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3977 | happens when statically linking PIC code, or when |
3978 | using -Bsymbolic. */ | |
252b5132 RH |
3979 | break; |
3980 | } | |
3981 | ||
dd7e64d4 L |
3982 | if (h->plt.offset != (bfd_vma) -1) |
3983 | { | |
ee2fdd6f L |
3984 | if (htab->plt_second != NULL) |
3985 | { | |
3986 | resolved_plt = htab->plt_second; | |
3987 | plt_offset = eh->plt_second.offset; | |
3988 | } | |
3989 | else | |
3990 | { | |
3991 | resolved_plt = htab->elf.splt; | |
3992 | plt_offset = h->plt.offset; | |
3993 | } | |
dd7e64d4 L |
3994 | } |
3995 | else | |
3996 | { | |
3997 | resolved_plt = htab->plt_got; | |
3998 | plt_offset = eh->plt_got.offset; | |
3999 | } | |
4000 | ||
4001 | relocation = (resolved_plt->output_section->vma | |
4002 | + resolved_plt->output_offset | |
4003 | + plt_offset); | |
b34976b6 | 4004 | unresolved_reloc = FALSE; |
252b5132 RH |
4005 | break; |
4006 | ||
1788fc08 | 4007 | case R_386_SIZE32: |
1788fc08 L |
4008 | /* Set to symbol size. */ |
4009 | relocation = st_size; | |
4010 | /* Fall through. */ | |
4011 | ||
252b5132 RH |
4012 | case R_386_32: |
4013 | case R_386_PC32: | |
3348747a NS |
4014 | if ((input_section->flags & SEC_ALLOC) == 0 |
4015 | || is_vxworks_tls) | |
ec338859 AM |
4016 | break; |
4017 | ||
aec6b87e L |
4018 | /* Copy dynamic function pointer relocations. Don't generate |
4019 | dynamic relocations against resolved undefined weak symbols | |
4020 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4021 | if ((bfd_link_pic (info) |
ef5aade5 | 4022 | && (h == NULL |
aec6b87e L |
4023 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4024 | && (!resolved_to_zero | |
4025 | || r_type == R_386_PC32)) | |
4026 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4027 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4028 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4029 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4030 | && !bfd_link_pic (info) |
12d0ee4a AM |
4031 | && h != NULL |
4032 | && h->dynindx != -1 | |
aec6b87e L |
4033 | && (!h->non_got_ref |
4034 | || eh->func_pointer_refcount > 0 | |
4035 | || (h->root.type == bfd_link_hash_undefweak | |
4036 | && !resolved_to_zero)) | |
bae420ef L |
4037 | && ((h->def_dynamic && !h->def_regular) |
4038 | /* Undefined weak symbol is bound locally when | |
4039 | PIC is false. */ | |
4040 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4041 | { |
947216bf | 4042 | Elf_Internal_Rela outrel; |
b34976b6 | 4043 | bfd_boolean skip, relocate; |
0c715baa | 4044 | asection *sreloc; |
252b5132 RH |
4045 | |
4046 | /* When generating a shared object, these relocations | |
4047 | are copied into the output file to be resolved at run | |
4048 | time. */ | |
4049 | ||
b34976b6 AM |
4050 | skip = FALSE; |
4051 | relocate = FALSE; | |
252b5132 | 4052 | |
c629eae0 JJ |
4053 | outrel.r_offset = |
4054 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4055 | rel->r_offset); | |
4056 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4057 | skip = TRUE; |
0bb2d96a | 4058 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4059 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4060 | outrel.r_offset += (input_section->output_section->vma |
4061 | + input_section->output_offset); | |
4062 | ||
4063 | if (skip) | |
0bb2d96a | 4064 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4065 | else if (h != NULL |
4066 | && h->dynindx != -1 | |
4067 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4068 | || !(bfd_link_executable (info) |
4069 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4070 | || !h->def_regular)) |
0bb2d96a | 4071 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4072 | else |
4073 | { | |
5a15f56f | 4074 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4075 | relocate = TRUE; |
5a15f56f | 4076 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4077 | } |
4078 | ||
cbe950e9 | 4079 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4080 | |
62d78908 L |
4081 | if (sreloc == NULL || sreloc->contents == NULL) |
4082 | { | |
4083 | r = bfd_reloc_notsupported; | |
4084 | goto check_relocation_error; | |
4085 | } | |
0c715baa | 4086 | |
59d6ffb2 | 4087 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4088 | |
4089 | /* If this reloc is against an external symbol, we do | |
4090 | not want to fiddle with the addend. Otherwise, we | |
4091 | need to include the symbol value so that it becomes | |
4092 | an addend for the dynamic reloc. */ | |
0f88be7a | 4093 | if (! relocate) |
252b5132 RH |
4094 | continue; |
4095 | } | |
252b5132 RH |
4096 | break; |
4097 | ||
37e55690 | 4098 | case R_386_TLS_IE: |
0e1862bb | 4099 | if (!bfd_link_executable (info)) |
37e55690 | 4100 | { |
947216bf | 4101 | Elf_Internal_Rela outrel; |
37e55690 | 4102 | asection *sreloc; |
37e55690 JJ |
4103 | |
4104 | outrel.r_offset = rel->r_offset | |
4105 | + input_section->output_section->vma | |
4106 | + input_section->output_offset; | |
4107 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4108 | sreloc = elf_section_data (input_section)->sreloc; | |
4109 | if (sreloc == NULL) | |
4110 | abort (); | |
59d6ffb2 | 4111 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4112 | } |
4113 | /* Fall through */ | |
4114 | ||
13ae64f3 | 4115 | case R_386_TLS_GD: |
67a4f2b7 AO |
4116 | case R_386_TLS_GOTDESC: |
4117 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4118 | case R_386_TLS_IE_32: |
37e55690 | 4119 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4120 | tls_type = GOT_UNKNOWN; |
4121 | if (h == NULL && local_got_offsets) | |
0afcef53 | 4122 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
13ae64f3 | 4123 | else if (h != NULL) |
0afcef53 | 4124 | tls_type = elf_x86_hash_entry(h)->tls_type; |
37e55690 JJ |
4125 | if (tls_type == GOT_TLS_IE) |
4126 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4127 | |
4128 | if (! elf_i386_tls_transition (info, input_bfd, | |
4129 | input_section, contents, | |
4130 | symtab_hdr, sym_hashes, | |
4131 | &r_type, tls_type, rel, | |
bedfd056 | 4132 | relend, h, r_symndx, TRUE)) |
142411ca | 4133 | return FALSE; |
13ae64f3 JJ |
4134 | |
4135 | if (r_type == R_386_TLS_LE_32) | |
4136 | { | |
82e51918 | 4137 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4138 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4139 | { | |
142411ca | 4140 | unsigned int type; |
13ae64f3 JJ |
4141 | bfd_vma roff; |
4142 | ||
4143 | /* GD->LE transition. */ | |
6eaa7fb5 | 4144 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
4145 | if (type == 0x04) |
4146 | { | |
6eaa7fb5 L |
4147 | /* Change |
4148 | leal foo@tlsgd(,%ebx,1), %eax | |
4149 | call ___tls_get_addr@PLT | |
4150 | into: | |
4151 | movl %gs:0, %eax | |
4152 | subl $foo@tpoff, %eax | |
13ae64f3 | 4153 | (6 byte form of subl). */ |
142411ca | 4154 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4155 | } |
4156 | else | |
4157 | { | |
6eaa7fb5 L |
4158 | /* Change |
4159 | leal foo@tlsgd(%ebx), %eax | |
4160 | call ___tls_get_addr@PLT | |
4161 | nop | |
4162 | or | |
4163 | leal foo@tlsgd(%reg), %eax | |
4164 | call *___tls_get_addr@GOT(%reg) | |
4165 | which may be converted to | |
4166 | addr32 call ___tls_get_addr | |
4167 | into: | |
4168 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 4169 | (6 byte form of subl). */ |
142411ca | 4170 | roff = rel->r_offset + 6; |
13ae64f3 | 4171 | } |
6eaa7fb5 L |
4172 | memcpy (contents + roff - 8, |
4173 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 4174 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4175 | contents + roff); |
6eaa7fb5 | 4176 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4177 | rel++; |
60f2e42e | 4178 | wrel++; |
13ae64f3 JJ |
4179 | continue; |
4180 | } | |
67a4f2b7 AO |
4181 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4182 | { | |
4183 | /* GDesc -> LE transition. | |
4184 | It's originally something like: | |
4185 | leal x@tlsdesc(%ebx), %eax | |
4186 | ||
4187 | leal x@ntpoff, %eax | |
4188 | ||
4189 | Registers other than %eax may be set up here. */ | |
4190 | ||
142411ca | 4191 | unsigned int val; |
67a4f2b7 AO |
4192 | bfd_vma roff; |
4193 | ||
67a4f2b7 | 4194 | roff = rel->r_offset; |
67a4f2b7 | 4195 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4196 | |
4197 | /* Now modify the instruction as appropriate. */ | |
4198 | /* aoliva FIXME: remove the above and xor the byte | |
4199 | below with 0x86. */ | |
4200 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4201 | contents + roff - 1); | |
eb4ff4d6 | 4202 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4203 | contents + roff); |
4204 | continue; | |
4205 | } | |
4206 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4207 | { | |
4208 | /* GDesc -> LE transition. | |
4209 | It's originally: | |
4210 | call *(%eax) | |
4211 | Turn it into: | |
142411ca | 4212 | xchg %ax,%ax */ |
67a4f2b7 | 4213 | |
67a4f2b7 | 4214 | bfd_vma roff; |
6bbec505 | 4215 | |
67a4f2b7 | 4216 | roff = rel->r_offset; |
10efb593 | 4217 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4218 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4219 | continue; | |
4220 | } | |
37e55690 | 4221 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4222 | { |
142411ca | 4223 | unsigned int val; |
13ae64f3 JJ |
4224 | |
4225 | /* IE->LE transition: | |
37e55690 JJ |
4226 | Originally it can be one of: |
4227 | movl foo, %eax | |
4228 | movl foo, %reg | |
4229 | addl foo, %reg | |
4230 | We change it into: | |
4231 | movl $foo, %eax | |
4232 | movl $foo, %reg | |
4233 | addl $foo, %reg. */ | |
37e55690 | 4234 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4235 | if (val == 0xa1) |
4236 | { | |
4237 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4238 | bfd_put_8 (output_bfd, 0xb8, |
4239 | contents + rel->r_offset - 1); | |
37e55690 | 4240 | } |
299bf759 | 4241 | else |
37e55690 | 4242 | { |
142411ca L |
4243 | unsigned int type; |
4244 | ||
55fd94b0 AM |
4245 | type = bfd_get_8 (input_bfd, |
4246 | contents + rel->r_offset - 2); | |
299bf759 | 4247 | switch (type) |
26e41594 | 4248 | { |
299bf759 L |
4249 | case 0x8b: |
4250 | /* movl */ | |
299bf759 L |
4251 | bfd_put_8 (output_bfd, 0xc7, |
4252 | contents + rel->r_offset - 2); | |
4253 | bfd_put_8 (output_bfd, | |
4254 | 0xc0 | ((val >> 3) & 7), | |
4255 | contents + rel->r_offset - 1); | |
4256 | break; | |
4257 | case 0x03: | |
4258 | /* addl */ | |
299bf759 L |
4259 | bfd_put_8 (output_bfd, 0x81, |
4260 | contents + rel->r_offset - 2); | |
4261 | bfd_put_8 (output_bfd, | |
4262 | 0xc0 | ((val >> 3) & 7), | |
4263 | contents + rel->r_offset - 1); | |
4264 | break; | |
4265 | default: | |
4266 | BFD_FAIL (); | |
4267 | break; | |
26e41594 | 4268 | } |
37e55690 | 4269 | } |
eb4ff4d6 | 4270 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4271 | contents + rel->r_offset); |
4272 | continue; | |
4273 | } | |
4274 | else | |
4275 | { | |
4276 | unsigned int val, type; | |
4277 | ||
4278 | /* {IE_32,GOTIE}->LE transition: | |
4279 | Originally it can be one of: | |
13ae64f3 | 4280 | subl foo(%reg1), %reg2 |
13ae64f3 | 4281 | movl foo(%reg1), %reg2 |
37e55690 | 4282 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4283 | We change it into: |
4284 | subl $foo, %reg2 | |
37e55690 JJ |
4285 | movl $foo, %reg2 (6 byte form) |
4286 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4287 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4288 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4289 | if (type == 0x8b) |
4290 | { | |
4291 | /* movl */ | |
13ae64f3 JJ |
4292 | bfd_put_8 (output_bfd, 0xc7, |
4293 | contents + rel->r_offset - 2); | |
4294 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4295 | contents + rel->r_offset - 1); | |
4296 | } | |
4297 | else if (type == 0x2b) | |
4298 | { | |
4299 | /* subl */ | |
13ae64f3 JJ |
4300 | bfd_put_8 (output_bfd, 0x81, |
4301 | contents + rel->r_offset - 2); | |
4302 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4303 | contents + rel->r_offset - 1); | |
4304 | } | |
37e55690 JJ |
4305 | else if (type == 0x03) |
4306 | { | |
4307 | /* addl */ | |
4308 | bfd_put_8 (output_bfd, 0x81, | |
4309 | contents + rel->r_offset - 2); | |
4310 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4311 | contents + rel->r_offset - 1); | |
4312 | } | |
13ae64f3 JJ |
4313 | else |
4314 | BFD_FAIL (); | |
37e55690 | 4315 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4316 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4317 | contents + rel->r_offset); |
4318 | else | |
eb4ff4d6 | 4319 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4320 | contents + rel->r_offset); |
13ae64f3 JJ |
4321 | continue; |
4322 | } | |
4323 | } | |
4324 | ||
6de2ae4a | 4325 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4326 | abort (); |
4327 | ||
4328 | if (h != NULL) | |
67a4f2b7 AO |
4329 | { |
4330 | off = h->got.offset; | |
0afcef53 | 4331 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 4332 | } |
13ae64f3 JJ |
4333 | else |
4334 | { | |
4335 | if (local_got_offsets == NULL) | |
4336 | abort (); | |
4337 | ||
4338 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4339 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4340 | } |
4341 | ||
4342 | if ((off & 1) != 0) | |
4343 | off &= ~1; | |
26e41594 | 4344 | else |
13ae64f3 | 4345 | { |
947216bf | 4346 | Elf_Internal_Rela outrel; |
91d6fa6a | 4347 | int dr_type; |
67a4f2b7 | 4348 | asection *sreloc; |
13ae64f3 | 4349 | |
6de2ae4a | 4350 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4351 | abort (); |
4352 | ||
67a4f2b7 AO |
4353 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4354 | ||
4355 | if (GOT_TLS_GDESC_P (tls_type)) | |
4356 | { | |
59d6ffb2 | 4357 | bfd_byte *loc; |
67a4f2b7 AO |
4358 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4359 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4360 | <= htab->elf.sgotplt->size); |
4361 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4362 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4363 | + offplt |
4364 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4365 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4366 | loc = sreloc->contents; |
765e526c | 4367 | loc += (htab->next_tls_desc_index++ |
5ae0bfb6 | 4368 | * sizeof (Elf32_External_Rel)); |
67a4f2b7 | 4369 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4370 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4371 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4372 | if (indx == 0) | |
4373 | { | |
4374 | BFD_ASSERT (! unresolved_reloc); | |
4375 | bfd_put_32 (output_bfd, | |
0afcef53 | 4376 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4377 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4378 | + htab->sgotplt_jump_table_size + 4); |
4379 | } | |
4380 | else | |
4381 | { | |
4382 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4383 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4384 | + htab->sgotplt_jump_table_size + 4); |
4385 | } | |
4386 | } | |
4387 | ||
6de2ae4a | 4388 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4389 | |
6de2ae4a L |
4390 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4391 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4392 | |
67a4f2b7 | 4393 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4394 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4395 | else if (GOT_TLS_GDESC_P (tls_type)) |
4396 | goto dr_done; | |
37e55690 JJ |
4397 | else if (tls_type == GOT_TLS_IE_POS) |
4398 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4399 | else |
4400 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4401 | |
37e55690 | 4402 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 | 4403 | bfd_put_32 (output_bfd, |
0afcef53 | 4404 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4405 | htab->elf.sgot->contents + off); |
37e55690 | 4406 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4407 | bfd_put_32 (output_bfd, |
0afcef53 | 4408 | _bfd_x86_elf_dtpoff_base (info) - relocation, |
6de2ae4a | 4409 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4410 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4411 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4412 | htab->elf.sgot->contents + off); |
13ae64f3 | 4413 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4414 | |
59d6ffb2 | 4415 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4416 | |
67a4f2b7 | 4417 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4418 | { |
4419 | if (indx == 0) | |
4420 | { | |
82e51918 | 4421 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4422 | bfd_put_32 (output_bfd, |
0afcef53 | 4423 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 4424 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4425 | } |
4426 | else | |
4427 | { | |
4428 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4429 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4430 | outrel.r_info = ELF32_R_INFO (indx, |
4431 | R_386_TLS_DTPOFF32); | |
4432 | outrel.r_offset += 4; | |
59d6ffb2 | 4433 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4434 | } |
4435 | } | |
37e55690 JJ |
4436 | else if (tls_type == GOT_TLS_IE_BOTH) |
4437 | { | |
4438 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4439 | (indx == 0 |
0afcef53 | 4440 | ? relocation - _bfd_x86_elf_dtpoff_base (info) |
eb4ff4d6 | 4441 | : 0), |
6de2ae4a | 4442 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4443 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4444 | outrel.r_offset += 4; | |
59d6ffb2 | 4445 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4446 | } |
13ae64f3 | 4447 | |
67a4f2b7 | 4448 | dr_done: |
13ae64f3 JJ |
4449 | if (h != NULL) |
4450 | h->got.offset |= 1; | |
4451 | else | |
4452 | local_got_offsets[r_symndx] |= 1; | |
4453 | } | |
4454 | ||
67a4f2b7 AO |
4455 | if (off >= (bfd_vma) -2 |
4456 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4457 | abort (); |
67a4f2b7 AO |
4458 | if (r_type == R_386_TLS_GOTDESC |
4459 | || r_type == R_386_TLS_DESC_CALL) | |
4460 | { | |
4461 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4462 | unresolved_reloc = FALSE; | |
4463 | } | |
4464 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4465 | { |
6de2ae4a L |
4466 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4467 | + htab->elf.sgotplt->output_offset; | |
4468 | relocation = htab->elf.sgot->output_section->vma | |
4469 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4470 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4471 | && tls_type == GOT_TLS_IE_BOTH) | |
4472 | relocation += 4; | |
4473 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4474 | relocation += g_o_t; |
b34976b6 | 4475 | unresolved_reloc = FALSE; |
13ae64f3 | 4476 | } |
67a4f2b7 | 4477 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4478 | { |
4479 | unsigned int val, type; | |
4480 | bfd_vma roff; | |
4481 | ||
4482 | /* GD->IE transition. */ | |
6eaa7fb5 L |
4483 | type = *(contents + rel->r_offset - 2); |
4484 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4485 | if (type == 0x04) |
4486 | { | |
6eaa7fb5 L |
4487 | /* Change |
4488 | leal foo@tlsgd(,%ebx,1), %eax | |
4489 | call ___tls_get_addr@PLT | |
4490 | into: | |
4491 | movl %gs:0, %eax | |
4492 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 4493 | val >>= 3; |
142411ca | 4494 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4495 | } |
4496 | else | |
4497 | { | |
6eaa7fb5 L |
4498 | /* Change |
4499 | leal foo@tlsgd(%ebx), %eax | |
4500 | call ___tls_get_addr@PLT | |
4501 | nop | |
4502 | or | |
4503 | leal foo@tlsgd(%reg), %eax | |
4504 | call *___tls_get_addr@GOT(%reg) | |
4505 | which may be converted to | |
4506 | addr32 call ___tls_get_addr | |
4507 | into: | |
4508 | movl %gs:0, %eax; | |
4509 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4510 | roff = rel->r_offset - 2; |
4511 | } | |
4512 | memcpy (contents + roff, | |
4513 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4514 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4515 | /* If foo is used only with foo@gotntpoff(%reg) and |
4516 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4517 | subl $foo@gottpoff(%reg), %eax | |
4518 | into: | |
4519 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4520 | if (tls_type == GOT_TLS_IE_POS) |
4521 | contents[roff + 6] = 0x03; | |
8c37241b | 4522 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4523 | htab->elf.sgot->output_section->vma |
4524 | + htab->elf.sgot->output_offset + off | |
4525 | - htab->elf.sgotplt->output_section->vma | |
4526 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 4527 | contents + roff + 8); |
6eaa7fb5 | 4528 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4529 | rel++; |
60f2e42e | 4530 | wrel++; |
13ae64f3 JJ |
4531 | continue; |
4532 | } | |
67a4f2b7 AO |
4533 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4534 | { | |
4535 | /* GDesc -> IE transition. | |
4536 | It's originally something like: | |
4537 | leal x@tlsdesc(%ebx), %eax | |
4538 | ||
4539 | Change it to: | |
142411ca | 4540 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4541 | or: |
4542 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4543 | ||
4544 | Registers other than %eax may be set up here. */ | |
4545 | ||
67a4f2b7 AO |
4546 | bfd_vma roff; |
4547 | ||
4548 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4549 | offset into any register, although it's probably | |
4550 | almost always going to be eax. */ | |
4551 | roff = rel->r_offset; | |
67a4f2b7 AO |
4552 | |
4553 | /* Now modify the instruction as appropriate. */ | |
4554 | /* To turn a leal into a movl in the form we use it, it | |
4555 | suffices to change the first byte from 0x8d to 0x8b. | |
4556 | aoliva FIXME: should we decide to keep the leal, all | |
4557 | we have to do is remove the statement below, and | |
4558 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4559 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4560 | ||
4561 | if (tls_type == GOT_TLS_IE_BOTH) | |
4562 | off += 4; | |
4563 | ||
4564 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4565 | htab->elf.sgot->output_section->vma |
4566 | + htab->elf.sgot->output_offset + off | |
4567 | - htab->elf.sgotplt->output_section->vma | |
4568 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4569 | contents + roff); |
4570 | continue; | |
4571 | } | |
4572 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4573 | { | |
4574 | /* GDesc -> IE transition. | |
4575 | It's originally: | |
4576 | call *(%eax) | |
4577 | ||
4578 | Change it to: | |
142411ca | 4579 | xchg %ax,%ax |
67a4f2b7 AO |
4580 | or |
4581 | negl %eax | |
4582 | depending on how we transformed the TLS_GOTDESC above. | |
4583 | */ | |
4584 | ||
67a4f2b7 AO |
4585 | bfd_vma roff; |
4586 | ||
67a4f2b7 | 4587 | roff = rel->r_offset; |
67a4f2b7 AO |
4588 | |
4589 | /* Now modify the instruction as appropriate. */ | |
4590 | if (tls_type != GOT_TLS_IE_NEG) | |
4591 | { | |
10efb593 L |
4592 | /* xchg %ax,%ax */ |
4593 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4594 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4595 | } | |
4596 | else | |
4597 | { | |
4598 | /* negl %eax */ | |
4599 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4600 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4601 | } | |
4602 | ||
4603 | continue; | |
4604 | } | |
4605 | else | |
4606 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4607 | break; |
4608 | ||
4609 | case R_386_TLS_LDM: | |
142411ca L |
4610 | if (! elf_i386_tls_transition (info, input_bfd, |
4611 | input_section, contents, | |
4612 | symtab_hdr, sym_hashes, | |
4613 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 4614 | relend, h, r_symndx, TRUE)) |
142411ca | 4615 | return FALSE; |
13ae64f3 | 4616 | |
142411ca L |
4617 | if (r_type != R_386_TLS_LDM) |
4618 | { | |
6eaa7fb5 L |
4619 | /* LD->LE transition. Change |
4620 | leal foo@tlsldm(%ebx) %eax | |
4621 | call ___tls_get_addr@PLT | |
4622 | into: | |
4623 | movl %gs:0, %eax | |
4624 | nop | |
4625 | leal 0(%esi,1), %esi | |
4626 | or change | |
4627 | leal foo@tlsldm(%reg) %eax | |
4628 | call *___tls_get_addr@GOT(%reg) | |
4629 | which may be converted to | |
4630 | addr32 call ___tls_get_addr | |
4631 | into: | |
4632 | movl %gs:0, %eax | |
4633 | leal 0(%esi), %esi */ | |
142411ca | 4634 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
4635 | if (*(contents + rel->r_offset + 4) == 0xff |
4636 | || *(contents + rel->r_offset + 4) == 0x67) | |
4637 | memcpy (contents + rel->r_offset - 2, | |
4638 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
4639 | else | |
4640 | memcpy (contents + rel->r_offset - 2, | |
4641 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4642 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 4643 | rel++; |
60f2e42e | 4644 | wrel++; |
13ae64f3 JJ |
4645 | continue; |
4646 | } | |
4647 | ||
6de2ae4a | 4648 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4649 | abort (); |
4650 | ||
0afcef53 | 4651 | off = htab->tls_ld_or_ldm_got.offset; |
13ae64f3 JJ |
4652 | if (off & 1) |
4653 | off &= ~1; | |
4654 | else | |
4655 | { | |
947216bf | 4656 | Elf_Internal_Rela outrel; |
13ae64f3 | 4657 | |
6de2ae4a | 4658 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4659 | abort (); |
4660 | ||
6de2ae4a L |
4661 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4662 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4663 | |
4664 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4665 | htab->elf.sgot->contents + off); |
13ae64f3 | 4666 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4667 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4668 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 4669 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
0afcef53 | 4670 | htab->tls_ld_or_ldm_got.offset |= 1; |
13ae64f3 | 4671 | } |
6de2ae4a L |
4672 | relocation = htab->elf.sgot->output_section->vma |
4673 | + htab->elf.sgot->output_offset + off | |
4674 | - htab->elf.sgotplt->output_section->vma | |
4675 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 4676 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4677 | break; |
4678 | ||
4679 | case R_386_TLS_LDO_32: | |
0e1862bb L |
4680 | if (!bfd_link_executable (info) |
4681 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 4682 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
13ae64f3 JJ |
4683 | else |
4684 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4685 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4686 | break; |
4687 | ||
4688 | case R_386_TLS_LE_32: | |
13ae64f3 | 4689 | case R_386_TLS_LE: |
0e1862bb | 4690 | if (!bfd_link_executable (info)) |
37e55690 | 4691 | { |
947216bf | 4692 | Elf_Internal_Rela outrel; |
37e55690 | 4693 | asection *sreloc; |
37e55690 JJ |
4694 | |
4695 | outrel.r_offset = rel->r_offset | |
4696 | + input_section->output_section->vma | |
4697 | + input_section->output_offset; | |
4698 | if (h != NULL && h->dynindx != -1) | |
4699 | indx = h->dynindx; | |
4700 | else | |
4701 | indx = 0; | |
4702 | if (r_type == R_386_TLS_LE_32) | |
4703 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4704 | else | |
4705 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4706 | sreloc = elf_section_data (input_section)->sreloc; | |
4707 | if (sreloc == NULL) | |
4708 | abort (); | |
59d6ffb2 | 4709 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4710 | if (indx) |
4711 | continue; | |
4712 | else if (r_type == R_386_TLS_LE_32) | |
0afcef53 | 4713 | relocation = _bfd_x86_elf_dtpoff_base (info) - relocation; |
37e55690 | 4714 | else |
0afcef53 | 4715 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
37e55690 JJ |
4716 | } |
4717 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4718 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4719 | else |
eb4ff4d6 | 4720 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4721 | break; |
4722 | ||
252b5132 RH |
4723 | default: |
4724 | break; | |
4725 | } | |
4726 | ||
239e1f3a AM |
4727 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4728 | because such sections are not SEC_ALLOC and thus ld.so will | |
4729 | not process them. */ | |
8c694914 | 4730 | if (unresolved_reloc |
239e1f3a | 4731 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4732 | && h->def_dynamic) |
4733 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4734 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 4735 | { |
4eca0228 | 4736 | _bfd_error_handler |
695344c0 | 4737 | /* xgettext:c-format */ |
d42c267e | 4738 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4739 | input_bfd, |
4740 | input_section, | |
d42c267e | 4741 | rel->r_offset, |
843fe662 | 4742 | howto->name, |
6a30718d | 4743 | h->root.root.string); |
b34976b6 | 4744 | return FALSE; |
6a30718d | 4745 | } |
83be169b | 4746 | |
cbe950e9 | 4747 | do_relocation: |
252b5132 RH |
4748 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4749 | contents, rel->r_offset, | |
55fd94b0 | 4750 | relocation, 0); |
252b5132 | 4751 | |
62d78908 | 4752 | check_relocation_error: |
cf5c0c5b | 4753 | if (r != bfd_reloc_ok) |
252b5132 | 4754 | { |
cf5c0c5b | 4755 | const char *name; |
ffb2e45b | 4756 | |
cf5c0c5b AM |
4757 | if (h != NULL) |
4758 | name = h->root.root.string; | |
4759 | else | |
4760 | { | |
4761 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4762 | symtab_hdr->sh_link, | |
4763 | sym->st_name); | |
4764 | if (name == NULL) | |
b34976b6 | 4765 | return FALSE; |
cf5c0c5b AM |
4766 | if (*name == '\0') |
4767 | name = bfd_section_name (input_bfd, sec); | |
4768 | } | |
ffb2e45b | 4769 | |
cf5c0c5b | 4770 | if (r == bfd_reloc_overflow) |
1a72702b AM |
4771 | (*info->callbacks->reloc_overflow) |
4772 | (info, (h ? &h->root : NULL), name, howto->name, | |
4773 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
4774 | else |
4775 | { | |
4eca0228 | 4776 | _bfd_error_handler |
695344c0 | 4777 | /* xgettext:c-format */ |
d42c267e | 4778 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 4779 | input_bfd, input_section, |
d42c267e | 4780 | rel->r_offset, name, (int) r); |
b34976b6 | 4781 | return FALSE; |
cf5c0c5b | 4782 | } |
252b5132 | 4783 | } |
60f2e42e L |
4784 | |
4785 | if (wrel != rel) | |
4786 | *wrel = *rel; | |
4787 | } | |
4788 | ||
4789 | if (wrel != rel) | |
4790 | { | |
4791 | Elf_Internal_Shdr *rel_hdr; | |
4792 | size_t deleted = rel - wrel; | |
4793 | ||
4794 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
4795 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4796 | if (rel_hdr->sh_size == 0) | |
4797 | { | |
4798 | /* It is too late to remove an empty reloc section. Leave | |
4799 | one NONE reloc. | |
4800 | ??? What is wrong with an empty section??? */ | |
4801 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
4802 | deleted -= 1; | |
4803 | } | |
4804 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
4805 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
4806 | input_section->reloc_count -= deleted; | |
252b5132 RH |
4807 | } |
4808 | ||
b34976b6 | 4809 | return TRUE; |
252b5132 RH |
4810 | } |
4811 | ||
4812 | /* Finish up dynamic symbol handling. We set the contents of various | |
4813 | dynamic sections here. */ | |
4814 | ||
b34976b6 | 4815 | static bfd_boolean |
55fd94b0 AM |
4816 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4817 | struct bfd_link_info *info, | |
4818 | struct elf_link_hash_entry *h, | |
4819 | Elf_Internal_Sym *sym) | |
252b5132 | 4820 | { |
0afcef53 | 4821 | struct elf_x86_link_hash_table *htab; |
25e762b9 RM |
4822 | unsigned plt_entry_size; |
4823 | const struct elf_i386_backend_data *abed; | |
0afcef53 | 4824 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 4825 | bfd_boolean local_undefweak; |
ee2fdd6f | 4826 | bfd_boolean use_plt_second; |
252b5132 | 4827 | |
0afcef53 | 4828 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
4829 | if (htab == NULL) |
4830 | return FALSE; | |
252b5132 | 4831 | |
25e762b9 | 4832 | abed = get_elf_i386_backend_data (output_bfd); |
765e526c | 4833 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 4834 | |
ee2fdd6f L |
4835 | /* Use the second PLT section only if there is .plt section. */ |
4836 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
4837 | ||
0afcef53 | 4838 | eh = (struct elf_x86_link_hash_entry *) h; |
e133d005 L |
4839 | if (eh->no_finish_dynamic_symbol) |
4840 | abort (); | |
dd7e64d4 | 4841 | |
aec6b87e L |
4842 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
4843 | resolved undefined weak symbols in executable so that their | |
4844 | references have value 0 at run-time. */ | |
0afcef53 | 4845 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, I386_ELF_DATA, |
e62b9723 L |
4846 | eh->has_got_reloc, |
4847 | eh); | |
aec6b87e | 4848 | |
252b5132 RH |
4849 | if (h->plt.offset != (bfd_vma) -1) |
4850 | { | |
ee2fdd6f | 4851 | bfd_vma plt_index, plt_offset; |
252b5132 | 4852 | bfd_vma got_offset; |
947216bf AM |
4853 | Elf_Internal_Rela rel; |
4854 | bfd_byte *loc; | |
ee2fdd6f | 4855 | asection *plt, *resolved_plt, *gotplt, *relplt; |
cbe950e9 L |
4856 | |
4857 | /* When building a static executable, use .iplt, .igot.plt and | |
4858 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4859 | if (htab->elf.splt != NULL) |
cbe950e9 | 4860 | { |
6de2ae4a L |
4861 | plt = htab->elf.splt; |
4862 | gotplt = htab->elf.sgotplt; | |
4863 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4864 | } |
4865 | else | |
4866 | { | |
6de2ae4a L |
4867 | plt = htab->elf.iplt; |
4868 | gotplt = htab->elf.igotplt; | |
4869 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4870 | } |
252b5132 RH |
4871 | |
4872 | /* This symbol has an entry in the procedure linkage table. Set | |
4873 | it up. */ | |
4874 | ||
cbe950e9 | 4875 | if ((h->dynindx == -1 |
aec6b87e | 4876 | && !local_undefweak |
0e1862bb | 4877 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
4878 | && h->def_regular |
4879 | && h->type == STT_GNU_IFUNC)) | |
4880 | || plt == NULL | |
4881 | || gotplt == NULL | |
4882 | || relplt == NULL) | |
cec7f46a | 4883 | abort (); |
252b5132 RH |
4884 | |
4885 | /* Get the index in the procedure linkage table which | |
4886 | corresponds to this symbol. This is the index of this symbol | |
4887 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4888 | first entry in the procedure linkage table is reserved. |
252b5132 | 4889 | |
cbe950e9 | 4890 | Get the offset into the .got table of the entry that |
252b5132 | 4891 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 4892 | The first three are reserved. |
6bbec505 | 4893 | |
cbe950e9 L |
4894 | For static executables, we don't reserve anything. */ |
4895 | ||
6de2ae4a | 4896 | if (plt == htab->elf.splt) |
cbe950e9 | 4897 | { |
f604c2a2 | 4898 | got_offset = (h->plt.offset / plt_entry_size |
765e526c | 4899 | - htab->plt.has_plt0); |
e1f98742 | 4900 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
4901 | } |
4902 | else | |
4903 | { | |
e1f98742 L |
4904 | got_offset = h->plt.offset / plt_entry_size; |
4905 | got_offset = got_offset * 4; | |
cbe950e9 | 4906 | } |
252b5132 | 4907 | |
f604c2a2 L |
4908 | /* Fill in the entry in the procedure linkage table and update |
4909 | the first slot. */ | |
765e526c | 4910 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
f604c2a2 | 4911 | plt_entry_size); |
ee2fdd6f L |
4912 | |
4913 | if (use_plt_second) | |
4914 | { | |
4915 | const bfd_byte *plt_entry; | |
4916 | if (bfd_link_pic (info)) | |
765e526c | 4917 | plt_entry = htab->non_lazy_plt->pic_plt_entry; |
ee2fdd6f | 4918 | else |
765e526c | 4919 | plt_entry = htab->non_lazy_plt->plt_entry; |
ee2fdd6f | 4920 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c | 4921 | plt_entry, htab->non_lazy_plt->plt_entry_size); |
ee2fdd6f L |
4922 | |
4923 | resolved_plt = htab->plt_second; | |
4924 | plt_offset = eh->plt_second.offset; | |
4925 | } | |
4926 | else | |
4927 | { | |
4928 | resolved_plt = plt; | |
4929 | plt_offset = h->plt.offset; | |
4930 | } | |
4931 | ||
0e1862bb | 4932 | if (! bfd_link_pic (info)) |
252b5132 | 4933 | { |
252b5132 | 4934 | bfd_put_32 (output_bfd, |
cbe950e9 L |
4935 | (gotplt->output_section->vma |
4936 | + gotplt->output_offset | |
252b5132 | 4937 | + got_offset), |
ee2fdd6f | 4938 | resolved_plt->contents + plt_offset |
765e526c | 4939 | + htab->plt.plt_got_offset); |
eac338cf | 4940 | |
f604c2a2 | 4941 | if (abed->os == is_vxworks) |
eac338cf PB |
4942 | { |
4943 | int s, k, reloc_index; | |
4944 | ||
4945 | /* Create the R_386_32 relocation referencing the GOT | |
4946 | for this PLT entry. */ | |
4947 | ||
4948 | /* S: Current slot number (zero-based). */ | |
765e526c L |
4949 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
4950 | / htab->plt.plt_entry_size); | |
eac338cf | 4951 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 4952 | if (bfd_link_pic (info)) |
eac338cf PB |
4953 | k = PLTRESOLVE_RELOCS_SHLIB; |
4954 | else | |
4955 | k = PLTRESOLVE_RELOCS; | |
4956 | /* Skip the PLTresolve relocations, and the relocations for | |
4957 | the other PLT slots. */ | |
4958 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
765e526c | 4959 | loc = (htab->srelplt2->contents + reloc_index |
eac338cf PB |
4960 | * sizeof (Elf32_External_Rel)); |
4961 | ||
ee2fdd6f L |
4962 | rel.r_offset = (plt->output_section->vma |
4963 | + plt->output_offset | |
eac338cf | 4964 | + h->plt.offset + 2), |
7325306f | 4965 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4966 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4967 | ||
4968 | /* Create the R_386_32 relocation referencing the beginning of | |
4969 | the PLT for this GOT entry. */ | |
6de2ae4a L |
4970 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
4971 | + htab->elf.sgotplt->output_offset | |
eac338cf | 4972 | + got_offset); |
7325306f | 4973 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 4974 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 4975 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 4976 | } |
252b5132 RH |
4977 | } |
4978 | else | |
4979 | { | |
252b5132 | 4980 | bfd_put_32 (output_bfd, got_offset, |
ee2fdd6f | 4981 | resolved_plt->contents + plt_offset |
765e526c | 4982 | + htab->plt.plt_got_offset); |
252b5132 RH |
4983 | } |
4984 | ||
aec6b87e L |
4985 | /* Fill in the entry in the global offset table. Leave the entry |
4986 | as zero for undefined weak symbol in PIE. No PLT relocation | |
4987 | against undefined weak symbol in PIE. */ | |
4988 | if (!local_undefweak) | |
cbe950e9 | 4989 | { |
765e526c | 4990 | if (htab->plt.has_plt0) |
f604c2a2 L |
4991 | bfd_put_32 (output_bfd, |
4992 | (plt->output_section->vma | |
4993 | + plt->output_offset | |
4994 | + h->plt.offset | |
765e526c | 4995 | + htab->lazy_plt->plt_lazy_offset), |
f604c2a2 | 4996 | gotplt->contents + got_offset); |
252b5132 | 4997 | |
aec6b87e L |
4998 | /* Fill in the entry in the .rel.plt section. */ |
4999 | rel.r_offset = (gotplt->output_section->vma | |
5000 | + gotplt->output_offset | |
5001 | + got_offset); | |
5002 | if (h->dynindx == -1 | |
5003 | || ((bfd_link_executable (info) | |
5004 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5005 | && h->def_regular | |
5006 | && h->type == STT_GNU_IFUNC)) | |
5007 | { | |
6322e5c5 L |
5008 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5009 | h->root.root.string, | |
5010 | h->root.u.def.section->owner); | |
5011 | ||
aec6b87e L |
5012 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5013 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5014 | in the .got.plt section. */ | |
5015 | bfd_put_32 (output_bfd, | |
5016 | (h->root.u.def.value | |
5017 | + h->root.u.def.section->output_section->vma | |
5018 | + h->root.u.def.section->output_offset), | |
5019 | gotplt->contents + got_offset); | |
5020 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5021 | /* R_386_IRELATIVE comes last. */ | |
5022 | plt_index = htab->next_irelative_index--; | |
5023 | } | |
5024 | else | |
5025 | { | |
5026 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5027 | plt_index = htab->next_jump_slot_index++; | |
5028 | } | |
5029 | ||
5030 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5031 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5032 | ||
f604c2a2 L |
5033 | /* Don't fill the second and third slots in PLT entry for |
5034 | static executables nor without PLT0. */ | |
765e526c | 5035 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e L |
5036 | { |
5037 | bfd_put_32 (output_bfd, | |
5038 | plt_index * sizeof (Elf32_External_Rel), | |
5039 | plt->contents + h->plt.offset | |
765e526c | 5040 | + htab->lazy_plt->plt_reloc_offset); |
f604c2a2 L |
5041 | bfd_put_32 (output_bfd, |
5042 | - (h->plt.offset | |
765e526c | 5043 | + htab->lazy_plt->plt_plt_offset + 4), |
f604c2a2 | 5044 | (plt->contents + h->plt.offset |
765e526c | 5045 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 5046 | } |
e1f98742 | 5047 | } |
dd7e64d4 L |
5048 | } |
5049 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5050 | { | |
5051 | bfd_vma got_offset, plt_offset; | |
5052 | asection *plt, *got, *gotplt; | |
5053 | const bfd_byte *got_plt_entry; | |
5054 | ||
dd7e64d4 L |
5055 | /* Set the entry in the GOT procedure linkage table. */ |
5056 | plt = htab->plt_got; | |
5057 | got = htab->elf.sgot; | |
5058 | gotplt = htab->elf.sgotplt; | |
5059 | got_offset = h->got.offset; | |
5060 | ||
5061 | if (got_offset == (bfd_vma) -1 | |
5062 | || plt == NULL | |
5063 | || got == NULL | |
5064 | || gotplt == NULL) | |
5065 | abort (); | |
5066 | ||
5067 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5068 | if (! bfd_link_pic (info)) |
252b5132 | 5069 | { |
765e526c | 5070 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 5071 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 5072 | } |
dd7e64d4 L |
5073 | else |
5074 | { | |
765e526c | 5075 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
5076 | got_offset += (got->output_section->vma |
5077 | + got->output_offset | |
5078 | - gotplt->output_section->vma | |
5079 | - gotplt->output_offset); | |
5080 | } | |
5081 | ||
5082 | plt_offset = eh->plt_got.offset; | |
5083 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
765e526c | 5084 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 5085 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 | 5086 | (plt->contents + plt_offset |
765e526c | 5087 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
5088 | } |
5089 | ||
aec6b87e L |
5090 | if (!local_undefweak |
5091 | && !h->def_regular | |
dd7e64d4 L |
5092 | && (h->plt.offset != (bfd_vma) -1 |
5093 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5094 | { | |
5095 | /* Mark the symbol as undefined, rather than as defined in | |
5096 | the .plt section. Leave the value if there were any | |
5097 | relocations where pointer equality matters (this is a clue | |
5098 | for the dynamic linker, to make function pointer | |
5099 | comparisons work between an application and shared | |
5100 | library), otherwise set it to zero. If a function is only | |
5101 | called from a binary, there is no need to slow down | |
5102 | shared libraries because of that. */ | |
5103 | sym->st_shndx = SHN_UNDEF; | |
5104 | if (!h->pointer_equality_needed) | |
5105 | sym->st_value = 0; | |
252b5132 RH |
5106 | } |
5107 | ||
aec6b87e L |
5108 | /* Don't generate dynamic GOT relocation against undefined weak |
5109 | symbol in executable. */ | |
13ae64f3 | 5110 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
5111 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type) |
5112 | && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 | |
aec6b87e | 5113 | && !local_undefweak) |
252b5132 | 5114 | { |
947216bf | 5115 | Elf_Internal_Rela rel; |
233cc9c1 | 5116 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
5117 | |
5118 | /* This symbol has an entry in the global offset table. Set it | |
5119 | up. */ | |
5120 | ||
6de2ae4a | 5121 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5122 | abort (); |
252b5132 | 5123 | |
6de2ae4a L |
5124 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5125 | + htab->elf.sgot->output_offset | |
dc810e39 | 5126 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5127 | |
dd5724d5 AM |
5128 | /* If this is a static link, or it is a -Bsymbolic link and the |
5129 | symbol is defined locally or was forced to be local because | |
5130 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5131 | The entry in the global offset table will already have been |
5132 | initialized in the relocate_section function. */ | |
710ab287 | 5133 | if (h->def_regular |
0018b0a3 L |
5134 | && h->type == STT_GNU_IFUNC) |
5135 | { | |
233cc9c1 L |
5136 | if (h->plt.offset == (bfd_vma) -1) |
5137 | { | |
5138 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5139 | if (htab->elf.splt == NULL) | |
5140 | { | |
5141 | /* use .rel[a].iplt section to store .got relocations | |
5142 | in static executable. */ | |
5143 | relgot = htab->elf.irelplt; | |
5144 | } | |
5145 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5146 | { | |
6322e5c5 L |
5147 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5148 | h->root.root.string, | |
5149 | h->root.u.def.section->owner); | |
5150 | ||
233cc9c1 L |
5151 | bfd_put_32 (output_bfd, |
5152 | (h->root.u.def.value | |
5153 | + h->root.u.def.section->output_section->vma | |
5154 | + h->root.u.def.section->output_offset), | |
5155 | htab->elf.sgot->contents + h->got.offset); | |
5156 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5157 | } | |
5158 | else | |
5159 | goto do_glob_dat; | |
5160 | } | |
5161 | else if (bfd_link_pic (info)) | |
710ab287 L |
5162 | { |
5163 | /* Generate R_386_GLOB_DAT. */ | |
5164 | goto do_glob_dat; | |
5165 | } | |
5166 | else | |
5167 | { | |
cd2b2c10 | 5168 | asection *plt; |
ee2fdd6f | 5169 | bfd_vma plt_offset; |
cd2b2c10 | 5170 | |
710ab287 L |
5171 | if (!h->pointer_equality_needed) |
5172 | abort (); | |
5173 | ||
5174 | /* For non-shared object, we can't use .got.plt, which | |
5175 | contains the real function addres if we need pointer | |
5176 | equality. We load the GOT entry with the PLT entry. */ | |
ee2fdd6f L |
5177 | if (htab->plt_second != NULL) |
5178 | { | |
5179 | plt = htab->plt_second; | |
5180 | plt_offset = eh->plt_second.offset; | |
5181 | } | |
5182 | else | |
5183 | { | |
5184 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
5185 | plt_offset = h->plt.offset; | |
5186 | } | |
710ab287 L |
5187 | bfd_put_32 (output_bfd, |
5188 | (plt->output_section->vma | |
ee2fdd6f | 5189 | + plt->output_offset + plt_offset), |
6de2ae4a | 5190 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5191 | return TRUE; |
5192 | } | |
0018b0a3 | 5193 | } |
0e1862bb | 5194 | else if (bfd_link_pic (info) |
0018b0a3 | 5195 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5196 | { |
6725bdbf | 5197 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5198 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5199 | } | |
252b5132 RH |
5200 | else |
5201 | { | |
dd5724d5 | 5202 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5203 | do_glob_dat: |
6725bdbf | 5204 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5205 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5206 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5207 | } | |
5208 | ||
233cc9c1 | 5209 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
5210 | } |
5211 | ||
f5385ebf | 5212 | if (h->needs_copy) |
252b5132 | 5213 | { |
947216bf | 5214 | Elf_Internal_Rela rel; |
5474d94f | 5215 | asection *s; |
252b5132 RH |
5216 | |
5217 | /* This symbol needs a copy reloc. Set it up. */ | |
5218 | ||
ffb2e45b AM |
5219 | if (h->dynindx == -1 |
5220 | || (h->root.type != bfd_link_hash_defined | |
5221 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5222 | || htab->elf.srelbss == NULL |
5223 | || htab->elf.sreldynrelro == NULL) | |
ffb2e45b | 5224 | abort (); |
252b5132 RH |
5225 | |
5226 | rel.r_offset = (h->root.u.def.value | |
5227 | + h->root.u.def.section->output_section->vma | |
5228 | + h->root.u.def.section->output_offset); | |
5229 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 5230 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
5231 | s = htab->elf.sreldynrelro; |
5232 | else | |
5233 | s = htab->elf.srelbss; | |
5234 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
5235 | } |
5236 | ||
b34976b6 | 5237 | return TRUE; |
252b5132 RH |
5238 | } |
5239 | ||
c25bc9fc L |
5240 | /* Finish up local dynamic symbol handling. We set the contents of |
5241 | various dynamic sections here. */ | |
5242 | ||
5243 | static bfd_boolean | |
5244 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5245 | { | |
5246 | struct elf_link_hash_entry *h | |
5247 | = (struct elf_link_hash_entry *) *slot; | |
5248 | struct bfd_link_info *info | |
23209a78 | 5249 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5250 | |
5251 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5252 | h, NULL); | |
5253 | } | |
5254 | ||
aec6b87e L |
5255 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5256 | here since undefined weak symbol may not be dynamic and may not be | |
5257 | called for elf_i386_finish_dynamic_symbol. */ | |
5258 | ||
5259 | static bfd_boolean | |
5260 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5261 | void *inf) | |
5262 | { | |
5263 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5264 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5265 | ||
5266 | if (h->root.type != bfd_link_hash_undefweak | |
5267 | || h->dynindx != -1) | |
5268 | return TRUE; | |
5269 | ||
5270 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 5271 | info, h, NULL); |
aec6b87e L |
5272 | } |
5273 | ||
38701953 AM |
5274 | /* Used to decide how to sort relocs in an optimal manner for the |
5275 | dynamic linker, before writing them out. */ | |
5276 | ||
5277 | static enum elf_reloc_type_class | |
cae1fbbb | 5278 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5279 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5280 | const Elf_Internal_Rela *rela) | |
38701953 | 5281 | { |
cae1fbbb L |
5282 | bfd *abfd = info->output_bfd; |
5283 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5284 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5285 | |
d9e3b590 L |
5286 | if (htab->dynsym != NULL |
5287 | && htab->dynsym->contents != NULL) | |
5288 | { | |
5289 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5290 | dynamic symbols. */ | |
5291 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
5292 | if (r_symndx != STN_UNDEF) |
5293 | { | |
5294 | Elf_Internal_Sym sym; | |
5295 | if (!bed->s->swap_symbol_in (abfd, | |
5296 | (htab->dynsym->contents | |
5297 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5298 | 0, &sym)) | |
5299 | abort (); | |
d9e3b590 | 5300 | |
c428ce9d L |
5301 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5302 | return reloc_class_ifunc; | |
5303 | } | |
d9e3b590 | 5304 | } |
cae1fbbb | 5305 | |
55fd94b0 | 5306 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 5307 | { |
c428ce9d L |
5308 | case R_386_IRELATIVE: |
5309 | return reloc_class_ifunc; | |
38701953 AM |
5310 | case R_386_RELATIVE: |
5311 | return reloc_class_relative; | |
5312 | case R_386_JUMP_SLOT: | |
5313 | return reloc_class_plt; | |
5314 | case R_386_COPY: | |
5315 | return reloc_class_copy; | |
5316 | default: | |
5317 | return reloc_class_normal; | |
5318 | } | |
5319 | } | |
5320 | ||
252b5132 RH |
5321 | /* Finish up the dynamic sections. */ |
5322 | ||
b34976b6 | 5323 | static bfd_boolean |
55fd94b0 AM |
5324 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5325 | struct bfd_link_info *info) | |
252b5132 | 5326 | { |
0afcef53 | 5327 | struct elf_x86_link_hash_table *htab; |
252b5132 | 5328 | bfd *dynobj; |
252b5132 | 5329 | asection *sdyn; |
25e762b9 | 5330 | const struct elf_i386_backend_data *abed; |
252b5132 | 5331 | |
0afcef53 | 5332 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
5333 | if (htab == NULL) |
5334 | return FALSE; | |
5335 | ||
ebe50bae | 5336 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5337 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5338 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5339 | |
ebe50bae | 5340 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5341 | { |
252b5132 RH |
5342 | Elf32_External_Dyn *dyncon, *dynconend; |
5343 | ||
6de2ae4a | 5344 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5345 | abort (); |
252b5132 RH |
5346 | |
5347 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5348 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5349 | for (; dyncon < dynconend; dyncon++) |
5350 | { | |
5351 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5352 | asection *s; |
252b5132 RH |
5353 | |
5354 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5355 | ||
5356 | switch (dyn.d_tag) | |
5357 | { | |
5358 | default: | |
f604c2a2 | 5359 | if (abed->os == is_vxworks |
25e762b9 | 5360 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
7a2b07ff | 5361 | break; |
0ac8d2ca | 5362 | continue; |
252b5132 RH |
5363 | |
5364 | case DT_PLTGOT: | |
6de2ae4a | 5365 | s = htab->elf.sgotplt; |
8c37241b | 5366 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5367 | break; |
5368 | ||
252b5132 | 5369 | case DT_JMPREL: |
6de2ae4a | 5370 | s = htab->elf.srelplt; |
6348e046 | 5371 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5372 | break; |
5373 | ||
5374 | case DT_PLTRELSZ: | |
6de2ae4a | 5375 | s = htab->elf.srelplt; |
eea6121a | 5376 | dyn.d_un.d_val = s->size; |
252b5132 | 5377 | break; |
252b5132 | 5378 | } |
0ac8d2ca AM |
5379 | |
5380 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5381 | } |
5382 | ||
6de2ae4a | 5383 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5384 | { |
1f78f649 L |
5385 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
5386 | really seem like the right value. */ | |
5387 | elf_section_data (htab->elf.splt->output_section) | |
5388 | ->this_hdr.sh_entsize = 4; | |
5389 | ||
765e526c | 5390 | if (htab->plt.has_plt0) |
252b5132 | 5391 | { |
f604c2a2 L |
5392 | /* Fill in the special first entry in the procedure linkage |
5393 | table. */ | |
765e526c L |
5394 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, |
5395 | htab->lazy_plt->plt0_entry_size); | |
5396 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
25e762b9 | 5397 | abed->plt0_pad_byte, |
765e526c | 5398 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
f604c2a2 | 5399 | if (!bfd_link_pic (info)) |
eac338cf | 5400 | { |
f604c2a2 L |
5401 | bfd_put_32 (output_bfd, |
5402 | (htab->elf.sgotplt->output_section->vma | |
5403 | + htab->elf.sgotplt->output_offset | |
5404 | + 4), | |
5405 | htab->elf.splt->contents | |
765e526c | 5406 | + htab->lazy_plt->plt0_got1_offset); |
f604c2a2 L |
5407 | bfd_put_32 (output_bfd, |
5408 | (htab->elf.sgotplt->output_section->vma | |
5409 | + htab->elf.sgotplt->output_offset | |
5410 | + 8), | |
5411 | htab->elf.splt->contents | |
765e526c | 5412 | + htab->lazy_plt->plt0_got2_offset); |
eac338cf | 5413 | |
f604c2a2 | 5414 | if (abed->os == is_vxworks) |
1f78f649 | 5415 | { |
f604c2a2 L |
5416 | Elf_Internal_Rela rel; |
5417 | int num_plts = (htab->elf.splt->size | |
765e526c | 5418 | / htab->plt.plt_entry_size) - 1; |
f604c2a2 | 5419 | unsigned char *p; |
765e526c | 5420 | asection *srelplt2 = htab->srelplt2; |
f604c2a2 L |
5421 | |
5422 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
5423 | + 4. On IA32 we use REL relocations so the | |
5424 | addend goes in the PLT directly. */ | |
5425 | rel.r_offset = (htab->elf.splt->output_section->vma | |
5426 | + htab->elf.splt->output_offset | |
765e526c | 5427 | + htab->lazy_plt->plt0_got1_offset); |
1f78f649 L |
5428 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
5429 | R_386_32); | |
f604c2a2 | 5430 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
0afcef53 | 5431 | srelplt2->contents); |
f604c2a2 L |
5432 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ |
5433 | + 8. */ | |
5434 | rel.r_offset = (htab->elf.splt->output_section->vma | |
5435 | + htab->elf.splt->output_offset | |
765e526c | 5436 | + htab->lazy_plt->plt0_got2_offset); |
f604c2a2 | 5437 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
1f78f649 | 5438 | R_386_32); |
f604c2a2 | 5439 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
0afcef53 | 5440 | srelplt2->contents + |
f604c2a2 L |
5441 | sizeof (Elf32_External_Rel)); |
5442 | /* Correct the .rel.plt.unloaded relocations. */ | |
0afcef53 | 5443 | p = srelplt2->contents; |
f604c2a2 L |
5444 | if (bfd_link_pic (info)) |
5445 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
5446 | else | |
5447 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5448 | ||
5449 | for (; num_plts; num_plts--) | |
5450 | { | |
5451 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
5452 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
5453 | R_386_32); | |
5454 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
5455 | p += sizeof (Elf32_External_Rel); | |
5456 | ||
5457 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
5458 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
5459 | R_386_32); | |
5460 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
5461 | p += sizeof (Elf32_External_Rel); | |
5462 | } | |
1f78f649 | 5463 | } |
eac338cf PB |
5464 | } |
5465 | } | |
252b5132 | 5466 | } |
f604c2a2 L |
5467 | |
5468 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
5469 | elf_section_data (htab->plt_got->output_section) | |
765e526c | 5470 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
ee2fdd6f L |
5471 | |
5472 | if (htab->plt_second != NULL && htab->plt_second->size > 0) | |
5473 | elf_section_data (htab->plt_second->output_section) | |
765e526c | 5474 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; |
252b5132 RH |
5475 | } |
5476 | ||
f604c2a2 L |
5477 | /* Fill in the first three entries in the global offset table. */ |
5478 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
252b5132 | 5479 | { |
56d4289c L |
5480 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5481 | { | |
4eca0228 | 5482 | _bfd_error_handler |
56d4289c L |
5483 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5484 | return FALSE; | |
5485 | } | |
5486 | ||
f604c2a2 L |
5487 | bfd_put_32 (output_bfd, |
5488 | (sdyn == NULL ? 0 | |
5489 | : sdyn->output_section->vma + sdyn->output_offset), | |
5490 | htab->elf.sgotplt->contents); | |
5491 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5492 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
252b5132 | 5493 | |
6de2ae4a | 5494 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5495 | } |
8c37241b | 5496 | |
e41b3a13 | 5497 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5498 | if (htab->plt_eh_frame != NULL |
5499 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5500 | { |
5501 | if (htab->elf.splt != NULL | |
5502 | && htab->elf.splt->size != 0 | |
5503 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5504 | && htab->elf.splt->output_section != NULL | |
5505 | && htab->plt_eh_frame->output_section != NULL) | |
5506 | { | |
5507 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5508 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5509 | + htab->plt_eh_frame->output_offset | |
5510 | + PLT_FDE_START_OFFSET; | |
5511 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5512 | htab->plt_eh_frame->contents | |
5513 | + PLT_FDE_START_OFFSET); | |
5514 | } | |
5515 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5516 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5517 | { |
5518 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5519 | htab->plt_eh_frame, | |
5520 | htab->plt_eh_frame->contents)) | |
5521 | return FALSE; | |
5522 | } | |
5523 | } | |
5524 | ||
fff53dae L |
5525 | /* Adjust .eh_frame for .plt.got section. */ |
5526 | if (htab->plt_got_eh_frame != NULL | |
5527 | && htab->plt_got_eh_frame->contents != NULL) | |
5528 | { | |
5529 | if (htab->plt_got != NULL | |
5530 | && htab->plt_got->size != 0 | |
5531 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
5532 | && htab->plt_got->output_section != NULL | |
5533 | && htab->plt_got_eh_frame->output_section != NULL) | |
5534 | { | |
5535 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
5536 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
5537 | + htab->plt_got_eh_frame->output_offset | |
5538 | + PLT_FDE_START_OFFSET; | |
5539 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5540 | htab->plt_got_eh_frame->contents | |
5541 | + PLT_FDE_START_OFFSET); | |
5542 | } | |
5543 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
5544 | { | |
5545 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5546 | htab->plt_got_eh_frame, | |
5547 | htab->plt_got_eh_frame->contents)) | |
5548 | return FALSE; | |
5549 | } | |
5550 | } | |
5551 | ||
ee2fdd6f L |
5552 | /* Adjust .eh_frame for the second PLT section. */ |
5553 | if (htab->plt_second_eh_frame != NULL | |
5554 | && htab->plt_second_eh_frame->contents != NULL) | |
5555 | { | |
5556 | if (htab->plt_second != NULL | |
5557 | && htab->plt_second->size != 0 | |
5558 | && (htab->plt_second->flags & SEC_EXCLUDE) == 0 | |
5559 | && htab->plt_second->output_section != NULL | |
5560 | && htab->plt_second_eh_frame->output_section != NULL) | |
5561 | { | |
5562 | bfd_vma plt_start = htab->plt_second->output_section->vma; | |
5563 | bfd_vma eh_frame_start | |
5564 | = (htab->plt_second_eh_frame->output_section->vma | |
5565 | + htab->plt_second_eh_frame->output_offset | |
5566 | + PLT_FDE_START_OFFSET); | |
5567 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5568 | htab->plt_second_eh_frame->contents | |
5569 | + PLT_FDE_START_OFFSET); | |
5570 | } | |
5571 | if (htab->plt_second_eh_frame->sec_info_type | |
5572 | == SEC_INFO_TYPE_EH_FRAME) | |
5573 | { | |
5574 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5575 | htab->plt_second_eh_frame, | |
5576 | htab->plt_second_eh_frame->contents)) | |
5577 | return FALSE; | |
5578 | } | |
5579 | } | |
5580 | ||
6de2ae4a L |
5581 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5582 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5583 | |
aec6b87e L |
5584 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5585 | if (bfd_link_pie (info)) | |
5586 | bfd_hash_traverse (&info->hash->table, | |
5587 | elf_i386_pie_finish_undefweak_symbol, | |
5588 | info); | |
5589 | ||
b34976b6 | 5590 | return TRUE; |
252b5132 RH |
5591 | } |
5592 | ||
233cc9c1 L |
5593 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5594 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5595 | It has to be done before elf_link_sort_relocs is called so that | |
5596 | dynamic relocations are properly sorted. */ | |
5597 | ||
5598 | static bfd_boolean | |
5599 | elf_i386_output_arch_local_syms | |
5600 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5601 | struct bfd_link_info *info, | |
5602 | void *flaginfo ATTRIBUTE_UNUSED, | |
5603 | int (*func) (void *, const char *, | |
5604 | Elf_Internal_Sym *, | |
5605 | asection *, | |
5606 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5607 | { | |
0afcef53 L |
5608 | struct elf_x86_link_hash_table *htab |
5609 | = elf_x86_hash_table (info, I386_ELF_DATA); | |
233cc9c1 L |
5610 | if (htab == NULL) |
5611 | return FALSE; | |
5612 | ||
5613 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5614 | htab_traverse (htab->loc_hash_table, | |
5615 | elf_i386_finish_local_dynamic_symbol, | |
5616 | info); | |
5617 | ||
5618 | return TRUE; | |
5619 | } | |
5620 | ||
f604c2a2 | 5621 | /* Forward declaration. */ |
765e526c | 5622 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt; |
f604c2a2 L |
5623 | |
5624 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
5625 | dynamic relocations. */ | |
5626 | ||
5627 | static long | |
5628 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
5629 | long symcount ATTRIBUTE_UNUSED, | |
5630 | asymbol **syms ATTRIBUTE_UNUSED, | |
5631 | long dynsymcount, | |
5632 | asymbol **dynsyms, | |
5633 | asymbol **ret) | |
5634 | { | |
f493882d | 5635 | long count, i, n; |
f604c2a2 | 5636 | int j; |
f604c2a2 | 5637 | bfd_byte *plt_contents; |
f493882d | 5638 | long relsize; |
765e526c L |
5639 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
5640 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
5641 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
5642 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
f604c2a2 L |
5643 | asection *plt; |
5644 | bfd_vma got_addr; | |
f493882d L |
5645 | enum elf_x86_plt_type plt_type; |
5646 | struct elf_x86_plt plts[] = | |
3972882e | 5647 | { |
f493882d L |
5648 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
5649 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
5650 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
5651 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } | |
f604c2a2 | 5652 | }; |
144bed8d | 5653 | |
f604c2a2 | 5654 | *ret = NULL; |
144bed8d | 5655 | |
f604c2a2 L |
5656 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
5657 | return 0; | |
3972882e | 5658 | |
f604c2a2 L |
5659 | if (dynsymcount <= 0) |
5660 | return 0; | |
cca5b8b6 | 5661 | |
f604c2a2 L |
5662 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
5663 | if (relsize <= 0) | |
5664 | return -1; | |
cca5b8b6 | 5665 | |
f604c2a2 L |
5666 | non_lazy_plt = NULL; |
5667 | /* Silence GCC 6. */ | |
5668 | lazy_plt = NULL; | |
ee2fdd6f L |
5669 | non_lazy_ibt_plt = NULL; |
5670 | lazy_ibt_plt = NULL; | |
f604c2a2 | 5671 | switch (get_elf_i386_backend_data (abfd)->os) |
144bed8d | 5672 | { |
f604c2a2 L |
5673 | case is_normal: |
5674 | non_lazy_plt = &elf_i386_non_lazy_plt; | |
ee2fdd6f L |
5675 | lazy_ibt_plt = &elf_i386_lazy_ibt_plt; |
5676 | non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
5677 | /* Fall through */ |
5678 | case is_vxworks: | |
5679 | lazy_plt = &elf_i386_lazy_plt; | |
5680 | break; | |
5681 | case is_nacl: | |
5682 | lazy_plt = &elf_i386_nacl_plt; | |
5683 | break; | |
5684 | } | |
5685 | ||
5686 | got_addr = 0; | |
3972882e | 5687 | |
f604c2a2 L |
5688 | count = 0; |
5689 | for (j = 0; plts[j].name != NULL; j++) | |
5690 | { | |
5691 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 5692 | if (plt == NULL || plt->size == 0) |
6f25f223 | 5693 | continue; |
533d0af0 | 5694 | |
f604c2a2 L |
5695 | /* Get the PLT section contents. */ |
5696 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5697 | if (plt_contents == NULL) | |
5698 | break; | |
5699 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5700 | plt_contents, 0, plt->size)) | |
5701 | { | |
5702 | free (plt_contents); | |
5703 | break; | |
5704 | } | |
5705 | ||
5706 | /* Check what kind of PLT it is. */ | |
5707 | plt_type = plt_unknown; | |
90efb642 L |
5708 | if (plts[j].type == plt_unknown |
5709 | && (plt->size >= (lazy_plt->plt0_entry_size | |
5710 | + lazy_plt->plt_entry_size))) | |
f604c2a2 L |
5711 | { |
5712 | /* Match lazy PLT first. */ | |
5713 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
5714 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
5715 | { |
5716 | /* The fist entry in the lazy IBT PLT is the same as the | |
5717 | normal lazy PLT. */ | |
5718 | if (lazy_ibt_plt != NULL | |
90efb642 | 5719 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
5720 | lazy_ibt_plt->plt_entry, |
5721 | lazy_ibt_plt->plt_got_offset) == 0)) | |
5722 | plt_type = plt_lazy | plt_second; | |
5723 | else | |
5724 | plt_type = plt_lazy; | |
5725 | } | |
f604c2a2 L |
5726 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, |
5727 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
5728 | { |
5729 | /* The fist entry in the PIC lazy IBT PLT is the same as | |
5730 | the normal PIC lazy PLT. */ | |
5731 | if (lazy_ibt_plt != NULL | |
90efb642 | 5732 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
5733 | lazy_ibt_plt->pic_plt_entry, |
5734 | lazy_ibt_plt->plt_got_offset) == 0)) | |
5735 | plt_type = plt_lazy | plt_pic | plt_second; | |
5736 | else | |
5737 | plt_type = plt_lazy | plt_pic; | |
5738 | } | |
f604c2a2 L |
5739 | } |
5740 | ||
5741 | if (non_lazy_plt != NULL | |
90efb642 L |
5742 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
5743 | && plt->size >= non_lazy_plt->plt_entry_size) | |
f604c2a2 L |
5744 | { |
5745 | /* Match non-lazy PLT. */ | |
5746 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
5747 | non_lazy_plt->plt_got_offset) == 0) | |
5748 | plt_type = plt_non_lazy; | |
5749 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
5750 | non_lazy_plt->plt_got_offset) == 0) | |
5751 | plt_type = plt_pic; | |
5752 | } | |
5753 | ||
ee2fdd6f | 5754 | if ((non_lazy_ibt_plt != NULL) |
90efb642 L |
5755 | && (plt_type == plt_unknown || plt_type == plt_second) |
5756 | && plt->size >= non_lazy_ibt_plt->plt_entry_size) | |
ee2fdd6f L |
5757 | { |
5758 | if (memcmp (plt_contents, | |
5759 | non_lazy_ibt_plt->plt_entry, | |
5760 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
5761 | { | |
5762 | /* Match IBT PLT. */ | |
5763 | plt_type = plt_second; | |
5764 | non_lazy_plt = non_lazy_ibt_plt; | |
5765 | } | |
5766 | else if (memcmp (plt_contents, | |
5767 | non_lazy_ibt_plt->pic_plt_entry, | |
5768 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
5769 | { | |
5770 | /* Match PIC IBT PLT. */ | |
5771 | plt_type = plt_second | plt_pic; | |
5772 | non_lazy_plt = non_lazy_ibt_plt; | |
5773 | } | |
5774 | } | |
5775 | ||
f604c2a2 | 5776 | if (plt_type == plt_unknown) |
37c0b6ee L |
5777 | { |
5778 | free (plt_contents); | |
5779 | continue; | |
5780 | } | |
3972882e | 5781 | |
f604c2a2 L |
5782 | plts[j].sec = plt; |
5783 | plts[j].type = plt_type; | |
ec1f73bb | 5784 | |
f604c2a2 L |
5785 | if ((plt_type & plt_lazy)) |
5786 | { | |
5787 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
5788 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
5789 | /* Skip PLT0 in lazy PLT. */ | |
5790 | i = 1; | |
5791 | } | |
5792 | else | |
5793 | { | |
5794 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
5795 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
5796 | i = 0; | |
5797 | } | |
fca6ae69 | 5798 | |
ee2fdd6f L |
5799 | /* Skip lazy PLT when the second PLT is used. */ |
5800 | if ((plt_type & (plt_lazy | plt_second)) | |
5801 | == (plt_lazy | plt_second)) | |
5802 | plts[j].count = 0; | |
5803 | else | |
5804 | { | |
5805 | n = plt->size / plts[j].plt_entry_size; | |
5806 | plts[j].count = n; | |
5807 | count += n - i; | |
5808 | } | |
f604c2a2 L |
5809 | |
5810 | plts[j].contents = plt_contents; | |
5811 | ||
5812 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
5813 | if ((plt_type & plt_pic)) | |
5814 | got_addr = (bfd_vma) -1; | |
144bed8d L |
5815 | } |
5816 | ||
f493882d L |
5817 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
5818 | got_addr, plts, dynsyms, | |
5819 | ret); | |
4c45e5c9 JJ |
5820 | } |
5821 | ||
f604c2a2 L |
5822 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
5823 | with GNU properties if found. Otherwise, return NULL. */ | |
5824 | ||
5825 | static bfd * | |
5826 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
5827 | { | |
a6798bab | 5828 | struct elf_x86_plt_layout_table plt_layout; |
f604c2a2 | 5829 | |
a6798bab L |
5830 | plt_layout.normal_target = FALSE; |
5831 | plt_layout.is_vxworks = FALSE; | |
f604c2a2 L |
5832 | switch (get_elf_i386_backend_data (info->output_bfd)->os) |
5833 | { | |
5834 | case is_normal: | |
a6798bab L |
5835 | plt_layout.lazy_plt = &elf_i386_lazy_plt; |
5836 | plt_layout.non_lazy_plt = &elf_i386_non_lazy_plt; | |
5837 | plt_layout.lazy_ibt_plt = &elf_i386_lazy_ibt_plt; | |
5838 | plt_layout.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
5839 | plt_layout.normal_target = TRUE; | |
f604c2a2 L |
5840 | break; |
5841 | case is_vxworks: | |
a6798bab L |
5842 | plt_layout.lazy_plt = &elf_i386_lazy_plt; |
5843 | plt_layout.non_lazy_plt = NULL; | |
5844 | plt_layout.lazy_ibt_plt = NULL; | |
5845 | plt_layout.non_lazy_ibt_plt = NULL; | |
5846 | plt_layout.is_vxworks = TRUE; | |
f604c2a2 L |
5847 | break; |
5848 | case is_nacl: | |
a6798bab L |
5849 | plt_layout.lazy_plt = &elf_i386_nacl_plt; |
5850 | plt_layout.non_lazy_plt = NULL; | |
5851 | plt_layout.lazy_ibt_plt = NULL; | |
5852 | plt_layout.non_lazy_ibt_plt = NULL; | |
f604c2a2 L |
5853 | break; |
5854 | } | |
5855 | ||
a6798bab | 5856 | return _bfd_x86_elf_link_setup_gnu_properties (info, &plt_layout); |
f604c2a2 L |
5857 | } |
5858 | ||
6d00b590 | 5859 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
5860 | #define TARGET_LITTLE_NAME "elf32-i386" |
5861 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5862 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5863 | #define ELF_MACHINE_CODE EM_386 |
5864 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5865 | |
5866 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5867 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5868 | #define elf_backend_want_got_plt 1 |
5869 | #define elf_backend_plt_readonly 1 | |
5870 | #define elf_backend_want_plt_sym 0 | |
5871 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5872 | #define elf_backend_plt_alignment 4 |
64f52338 | 5873 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 5874 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 5875 | #define elf_backend_caches_rawsize 1 |
5474d94f | 5876 | #define elf_backend_want_dynrelro 1 |
252b5132 | 5877 | |
8c29f035 AM |
5878 | /* Support RELA for objdump of prelink objects. */ |
5879 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5880 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5881 | ||
13ae64f3 | 5882 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5883 | |
dd5724d5 | 5884 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
dd5724d5 | 5885 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 5886 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 5887 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
5888 | |
5889 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5890 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5891 | #define elf_backend_check_relocs elf_i386_check_relocs |
f604c2a2 | 5892 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 5893 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5894 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5895 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 5896 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
dd5724d5 | 5897 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook |
c5fccbec DJ |
5898 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5899 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5900 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5901 | #define elf_backend_relocate_section elf_i386_relocate_section |
5902 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
f604c2a2 | 5903 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
dd5724d5 | 5904 | |
252b5132 | 5905 | #include "elf32-target.h" |
2bc3c89a AM |
5906 | |
5907 | /* FreeBSD support. */ | |
5908 | ||
5909 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5910 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
5911 | #undef TARGET_LITTLE_NAME |
5912 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
5913 | #undef ELF_OSABI |
5914 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
5915 | |
5916 | /* The kernel recognizes executables as valid only if they carry a | |
5917 | "FreeBSD" label in the ELF header. So we put this label on all | |
5918 | executables and (for simplicity) also all other object files. */ | |
5919 | ||
2bc3c89a | 5920 | static void |
d8045f23 | 5921 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 5922 | { |
78245035 | 5923 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 5924 | |
2bc3c89a | 5925 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
5926 | { |
5927 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5928 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
5929 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
5930 | } | |
caf47ea6 | 5931 | #endif |
2bc3c89a AM |
5932 | } |
5933 | ||
5934 | #undef elf_backend_post_process_headers | |
d8045f23 | 5935 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
5936 | #undef elf32_bed |
5937 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 5938 | |
d8045f23 NC |
5939 | #undef elf_backend_add_symbol_hook |
5940 | ||
2bc3c89a | 5941 | #include "elf32-target.h" |
eac338cf | 5942 | |
a6cc6b3b RO |
5943 | /* Solaris 2. */ |
5944 | ||
5945 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5946 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
5947 | #undef TARGET_LITTLE_NAME |
5948 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
5949 | ||
914082d1 L |
5950 | #undef elf_backend_post_process_headers |
5951 | ||
a6cc6b3b RO |
5952 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5953 | objects won't be recognized. */ | |
5954 | #undef ELF_OSABI | |
5955 | ||
5956 | #undef elf32_bed | |
5957 | #define elf32_bed elf32_i386_sol2_bed | |
5958 | ||
7dc98aea RO |
5959 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
5960 | boundary. */ | |
84865015 | 5961 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
5962 | #define elf_backend_static_tls_alignment 8 |
5963 | ||
a6cc6b3b RO |
5964 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5965 | ||
5966 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5967 | File, p.63. */ | |
84865015 | 5968 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
5969 | #define elf_backend_want_plt_sym 1 |
5970 | ||
84865015 NC |
5971 | #undef elf_backend_strtab_flags |
5972 | #define elf_backend_strtab_flags SHF_STRINGS | |
5973 | ||
5522f910 NC |
5974 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
5975 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
5976 | FALSE otherwise. ISECTION is the best guess matching section from the | |
5977 | input bfd IBFD, but it might be NULL. */ | |
5978 | ||
84865015 | 5979 | static bfd_boolean |
5522f910 NC |
5980 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
5981 | bfd *obfd ATTRIBUTE_UNUSED, | |
5982 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
5983 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
5984 | { |
5985 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
5986 | and sh_link fields of Solaris specific section types. */ |
5987 | return FALSE; | |
84865015 | 5988 | |
5522f910 | 5989 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
5990 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
5991 | ||
5992 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
5993 | ||
5994 | The following values should be set: | |
5995 | ||
5996 | Type Link Info | |
5997 | ----------------------------------------------------------------------------- | |
5998 | SHT_SUNW_ancillary The section header index of 0 | |
5999 | [0x6fffffee] the associated string table. | |
6000 | ||
6001 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
6002 | [0x6ffffff0] the associated symbol table. section header index of | |
6003 | the associated | |
6004 | SHT_SUNW_capchain table, | |
6005 | otherwise 0. | |
6006 | ||
6007 | SHT_SUNW_symsort The section header index of 0 | |
6008 | [0x6ffffff1] the associated symbol table. | |
6009 | ||
6010 | SHT_SUNW_tlssort The section header index of 0 | |
6011 | [0x6ffffff2] the associated symbol table. | |
6012 | ||
6013 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
6014 | [0x6ffffff3] the associated string table. symbol table index of the | |
6015 | This index is the same string last local symbol, | |
6016 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
6017 | section. SHT_SUNW_LDYNSYM only | |
6018 | contains local symbols, | |
6019 | sh_info is equivalent to | |
6020 | the number of symbols in | |
6021 | the table. | |
6022 | ||
6023 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
6024 | [0x6ffffff5] the section header index of to named strings, the | |
6025 | the associated section header index of | |
6026 | SHT_SUNW_capinfo table, the associated string | |
6027 | otherwise 0. table, otherwise 0. | |
6028 | ||
6029 | SHT_SUNW_move The section header index of 0 | |
6030 | [0x6ffffffa] the associated symbol table. | |
6031 | ||
6032 | SHT_SUNW_COMDAT 0 0 | |
6033 | [0x6ffffffb] | |
6034 | ||
6035 | SHT_SUNW_syminfo The section header index of The section header index | |
6036 | [0x6ffffffc] the associated symbol table. of the associated | |
6037 | .dynamic section. | |
6038 | ||
6039 | SHT_SUNW_verdef The section header index of The number of version | |
6040 | [0x6ffffffd] the associated string table. definitions within the | |
6041 | section. | |
6042 | ||
6043 | SHT_SUNW_verneed The section header index of The number of version | |
6044 | [0x6ffffffe] the associated string table. dependencies within the | |
6045 | section. | |
6046 | ||
6047 | SHT_SUNW_versym The section header index of 0 | |
6048 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
6049 | } |
6050 | ||
5522f910 NC |
6051 | #undef elf_backend_copy_special_section_fields |
6052 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 6053 | |
a6cc6b3b RO |
6054 | #include "elf32-target.h" |
6055 | ||
bf64a951 L |
6056 | /* Intel MCU support. */ |
6057 | ||
6058 | static bfd_boolean | |
6059 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6060 | { | |
6061 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6062 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6063 | return TRUE; | |
6064 | } | |
6065 | ||
6066 | #undef TARGET_LITTLE_SYM | |
6067 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6068 | #undef TARGET_LITTLE_NAME | |
6069 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 6070 | #undef ELF_ARCH |
bf64a951 L |
6071 | #define ELF_ARCH bfd_arch_iamcu |
6072 | ||
6073 | #undef ELF_MACHINE_CODE | |
6074 | #define ELF_MACHINE_CODE EM_IAMCU | |
6075 | ||
6076 | #undef ELF_OSABI | |
6077 | ||
6078 | #undef elf32_bed | |
6079 | #define elf32_bed elf32_iamcu_bed | |
6080 | ||
6081 | #undef elf_backend_object_p | |
6082 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6083 | ||
6084 | #undef elf_backend_static_tls_alignment | |
6085 | ||
6086 | #undef elf_backend_want_plt_sym | |
6087 | #define elf_backend_want_plt_sym 0 | |
6088 | ||
84865015 | 6089 | #undef elf_backend_strtab_flags |
5522f910 | 6090 | #undef elf_backend_copy_special_section_fields |
84865015 | 6091 | |
bf64a951 L |
6092 | #include "elf32-target.h" |
6093 | ||
6094 | /* Restore defaults. */ | |
6095 | #undef ELF_ARCH | |
6096 | #define ELF_ARCH bfd_arch_i386 | |
6097 | #undef ELF_MACHINE_CODE | |
6098 | #define ELF_MACHINE_CODE EM_386 | |
6099 | ||
a27e4371 RM |
6100 | /* Native Client support. */ |
6101 | ||
6102 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6103 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6104 | #undef TARGET_LITTLE_NAME |
6105 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6106 | #undef elf32_bed | |
6107 | #define elf32_bed elf32_i386_nacl_bed | |
6108 | ||
6109 | #undef ELF_MAXPAGESIZE | |
6110 | #define ELF_MAXPAGESIZE 0x10000 | |
6111 | ||
6112 | /* Restore defaults. */ | |
6113 | #undef ELF_OSABI | |
6114 | #undef elf_backend_want_plt_sym | |
6115 | #define elf_backend_want_plt_sym 0 | |
6116 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6117 | #undef elf_backend_static_tls_alignment |
6118 | ||
6119 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6120 | ||
6121 | #undef elf_backend_plt_alignment | |
6122 | #define elf_backend_plt_alignment 5 | |
6123 | #define NACL_PLT_ENTRY_SIZE 64 | |
6124 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6125 | ||
6126 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6127 | { | |
6128 | 0xff, 0x35, /* pushl contents of address */ | |
6129 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6130 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6131 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6132 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6133 | 0xff, 0xe1 /* jmp *%ecx */ | |
6134 | }; | |
6135 | ||
6136 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6137 | { | |
6138 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6139 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6140 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6141 | 0xff, 0xe1, /* jmp *%ecx */ | |
6142 | ||
6143 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6144 | 0x90, | |
6145 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6146 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6147 | ||
6148 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6149 | 0x68, /* pushl immediate */ | |
6150 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6151 | 0xe9, /* jmp relative */ | |
6152 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6153 | ||
6154 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6155 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6156 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6157 | 0x90, 0x90 | |
6158 | }; | |
6159 | ||
6160 | static const bfd_byte | |
6161 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6162 | { | |
6163 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6164 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6165 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6166 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6167 | |
6168 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6169 | so pad to that size with nop instructions. */ | |
6170 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6171 | }; |
6172 | ||
6173 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6174 | { | |
6175 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6176 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6177 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6178 | 0xff, 0xe1, /* jmp *%ecx */ | |
6179 | ||
6180 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6181 | 0x90, | |
6182 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6183 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6184 | ||
6185 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6186 | 0x68, /* pushl immediate */ | |
6187 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6188 | 0xe9, /* jmp relative */ | |
6189 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6190 | ||
6191 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6192 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6193 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6194 | 0x90, 0x90 | |
6195 | }; | |
6196 | ||
6197 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
6198 | { | |
6199 | #if (PLT_CIE_LENGTH != 20 \ | |
6200 | || PLT_FDE_LENGTH != 36 \ | |
6201 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6202 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6203 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
6204 | #endif | |
6205 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6206 | 0, 0, 0, 0, /* CIE ID */ | |
6207 | 1, /* CIE version */ | |
6208 | 'z', 'R', 0, /* Augmentation string */ | |
6209 | 1, /* Code alignment factor */ | |
6210 | 0x7c, /* Data alignment factor: -4 */ | |
6211 | 8, /* Return address column */ | |
6212 | 1, /* Augmentation size */ | |
6213 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6214 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
6215 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
6216 | DW_CFA_nop, DW_CFA_nop, | |
6217 | ||
6218 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6219 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
6220 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
6221 | 0, 0, 0, 0, /* .plt size goes here */ | |
6222 | 0, /* Augmentation size */ | |
6223 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
6224 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6225 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
6226 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6227 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6228 | 13, /* Block length */ | |
6229 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
6230 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
6231 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6232 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
6233 | DW_CFA_nop, DW_CFA_nop | |
6234 | }; | |
6235 | ||
765e526c | 6236 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt = |
a27e4371 RM |
6237 | { |
6238 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
6239 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
a27e4371 RM |
6240 | elf_i386_nacl_plt_entry, /* plt_entry */ |
6241 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
6242 | 2, /* plt0_got1_offset */ |
6243 | 8, /* plt0_got2_offset */ | |
6244 | 0, /* plt0_got2_insn_end */ | |
a27e4371 RM |
6245 | 2, /* plt_got_offset */ |
6246 | 33, /* plt_reloc_offset */ | |
6247 | 38, /* plt_plt_offset */ | |
765e526c L |
6248 | 0, /* plt_got_insn_size */ |
6249 | 0, /* plt_plt_insn_end */ | |
a27e4371 RM |
6250 | 32, /* plt_lazy_offset */ |
6251 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
6252 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
6253 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
f604c2a2 | 6254 | sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
a27e4371 RM |
6255 | }; |
6256 | ||
6257 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
6258 | { | |
f604c2a2 L |
6259 | 0x90, /* plt0_pad_byte: nop insn */ |
6260 | is_nacl /* os */ | |
a27e4371 RM |
6261 | }; |
6262 | ||
64b384e1 RM |
6263 | static bfd_boolean |
6264 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
6265 | { | |
6266 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
6267 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
6268 | return TRUE; | |
6269 | } | |
6270 | ||
a27e4371 RM |
6271 | #undef elf_backend_arch_data |
6272 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
6273 | ||
64b384e1 RM |
6274 | #undef elf_backend_object_p |
6275 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
6276 | #undef elf_backend_modify_segment_map |
6277 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6278 | #undef elf_backend_modify_program_headers | |
6279 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6280 | #undef elf_backend_final_write_processing |
6281 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6282 | |
a27e4371 RM |
6283 | #include "elf32-target.h" |
6284 | ||
5a68afcf | 6285 | /* Restore defaults. */ |
64b384e1 | 6286 | #undef elf_backend_object_p |
5a68afcf RM |
6287 | #undef elf_backend_modify_segment_map |
6288 | #undef elf_backend_modify_program_headers | |
887badb3 | 6289 | #undef elf_backend_final_write_processing |
5a68afcf | 6290 | |
eac338cf PB |
6291 | /* VxWorks support. */ |
6292 | ||
6293 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6294 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
6295 | #undef TARGET_LITTLE_NAME |
6296 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 6297 | #undef ELF_OSABI |
1587442d L |
6298 | #undef ELF_MAXPAGESIZE |
6299 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
6300 | #undef elf_backend_plt_alignment |
6301 | #define elf_backend_plt_alignment 4 | |
eac338cf | 6302 | |
23209a78 RM |
6303 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
6304 | { | |
6305 | 0x90, /* plt0_pad_byte */ | |
f604c2a2 | 6306 | is_vxworks /* os */ |
23209a78 | 6307 | }; |
eac338cf | 6308 | |
23209a78 RM |
6309 | #undef elf_backend_arch_data |
6310 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 6311 | |
13285a1b | 6312 | #undef elf_backend_relocs_compatible |
eac338cf PB |
6313 | #undef elf_backend_add_symbol_hook |
6314 | #define elf_backend_add_symbol_hook \ | |
6315 | elf_vxworks_add_symbol_hook | |
6316 | #undef elf_backend_link_output_symbol_hook | |
6317 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 6318 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
6319 | #undef elf_backend_emit_relocs |
6320 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
6321 | #undef elf_backend_final_write_processing | |
6322 | #define elf_backend_final_write_processing \ | |
6323 | elf_vxworks_final_write_processing | |
7dc98aea | 6324 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
6325 | |
6326 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
6327 | define it. */ | |
6328 | #undef elf_backend_want_plt_sym | |
6329 | #define elf_backend_want_plt_sym 1 | |
6330 | ||
6331 | #undef elf32_bed | |
6332 | #define elf32_bed elf32_i386_vxworks_bed | |
6333 | ||
6334 | #include "elf32-target.h" |