Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
b3adc24a | 2 | Copyright (C) 1993-2020 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 | ||
daf1c414 L |
185 | #define X86_PCREL_TYPE_P(TYPE) ((TYPE) == R_386_PC32) |
186 | ||
aebcc8ff L |
187 | #define X86_SIZE_TYPE_P(TYPE) ((TYPE) == R_386_SIZE32) |
188 | ||
252b5132 | 189 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
190 | #define TRACE(str) \ |
191 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
192 | #else |
193 | #define TRACE(str) | |
194 | #endif | |
195 | ||
196 | static reloc_howto_type * | |
f3185997 | 197 | elf_i386_reloc_type_lookup (bfd *abfd, |
55fd94b0 | 198 | bfd_reloc_code_real_type code) |
252b5132 RH |
199 | { |
200 | switch (code) | |
201 | { | |
202 | case BFD_RELOC_NONE: | |
203 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 204 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
205 | |
206 | case BFD_RELOC_32: | |
207 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 208 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
209 | |
210 | case BFD_RELOC_CTOR: | |
211 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 212 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
213 | |
214 | case BFD_RELOC_32_PCREL: | |
215 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 216 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
217 | |
218 | case BFD_RELOC_386_GOT32: | |
219 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 220 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
221 | |
222 | case BFD_RELOC_386_PLT32: | |
223 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 224 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
225 | |
226 | case BFD_RELOC_386_COPY: | |
227 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 228 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
229 | |
230 | case BFD_RELOC_386_GLOB_DAT: | |
231 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 232 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
233 | |
234 | case BFD_RELOC_386_JUMP_SLOT: | |
235 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 236 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
237 | |
238 | case BFD_RELOC_386_RELATIVE: | |
239 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 240 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
241 | |
242 | case BFD_RELOC_386_GOTOFF: | |
243 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 244 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
245 | |
246 | case BFD_RELOC_386_GOTPC: | |
247 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 248 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 249 | |
37e55690 JJ |
250 | /* These relocs are a GNU extension. */ |
251 | case BFD_RELOC_386_TLS_TPOFF: | |
252 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 253 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
254 | |
255 | case BFD_RELOC_386_TLS_IE: | |
256 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 257 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
258 | |
259 | case BFD_RELOC_386_TLS_GOTIE: | |
260 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 261 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 262 | |
13ae64f3 JJ |
263 | case BFD_RELOC_386_TLS_LE: |
264 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 265 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
266 | |
267 | case BFD_RELOC_386_TLS_GD: | |
268 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 269 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
270 | |
271 | case BFD_RELOC_386_TLS_LDM: | |
272 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 273 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 274 | |
252b5132 RH |
275 | case BFD_RELOC_16: |
276 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 277 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
278 | |
279 | case BFD_RELOC_16_PCREL: | |
280 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 281 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
282 | |
283 | case BFD_RELOC_8: | |
284 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 285 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
286 | |
287 | case BFD_RELOC_8_PCREL: | |
288 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 289 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 290 | |
13ae64f3 JJ |
291 | /* Common with Sun TLS implementation. */ |
292 | case BFD_RELOC_386_TLS_LDO_32: | |
293 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 294 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
295 | |
296 | case BFD_RELOC_386_TLS_IE_32: | |
297 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 298 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
299 | |
300 | case BFD_RELOC_386_TLS_LE_32: | |
301 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 302 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
303 | |
304 | case BFD_RELOC_386_TLS_DTPMOD32: | |
305 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 306 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
307 | |
308 | case BFD_RELOC_386_TLS_DTPOFF32: | |
309 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 310 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
311 | |
312 | case BFD_RELOC_386_TLS_TPOFF32: | |
313 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 314 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 315 | |
1788fc08 L |
316 | case BFD_RELOC_SIZE32: |
317 | TRACE ("BFD_RELOC_SIZE32"); | |
318 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
319 | ||
67a4f2b7 AO |
320 | case BFD_RELOC_386_TLS_GOTDESC: |
321 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
322 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
323 | ||
324 | case BFD_RELOC_386_TLS_DESC_CALL: | |
325 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
326 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
327 | ||
328 | case BFD_RELOC_386_TLS_DESC: | |
329 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
330 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
331 | ||
cbe950e9 L |
332 | case BFD_RELOC_386_IRELATIVE: |
333 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 334 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 335 | |
02a86693 L |
336 | case BFD_RELOC_386_GOT32X: |
337 | TRACE ("BFD_RELOC_386_GOT32X"); | |
338 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
339 | ||
252b5132 RH |
340 | case BFD_RELOC_VTABLE_INHERIT: |
341 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 342 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
343 | |
344 | case BFD_RELOC_VTABLE_ENTRY: | |
345 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 346 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
347 | |
348 | default: | |
f3185997 NC |
349 | TRACE ("Unknown"); |
350 | /* xgettext:c-format */ | |
e8f5af78 | 351 | _bfd_error_handler (_("%pB: unsupported relocation type: %#x"), |
f3185997 NC |
352 | abfd, (int) code); |
353 | bfd_set_error (bfd_error_bad_value); | |
354 | return NULL; | |
252b5132 | 355 | } |
252b5132 RH |
356 | } |
357 | ||
157090f7 AM |
358 | static reloc_howto_type * |
359 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
360 | const char *r_name) | |
361 | { | |
362 | unsigned int i; | |
363 | ||
364 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
365 | if (elf_howto_table[i].name != NULL | |
366 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
367 | return &elf_howto_table[i]; | |
368 | ||
369 | return NULL; | |
370 | } | |
371 | ||
142411ca | 372 | static reloc_howto_type * |
b366503e | 373 | elf_i386_rtype_to_howto (unsigned r_type) |
252b5132 | 374 | { |
dc47f327 AM |
375 | unsigned int indx; |
376 | ||
377 | if ((indx = r_type) >= R_386_standard | |
378 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
379 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 380 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
381 | >= R_386_ext2 - R_386_ext) |
382 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
383 | >= R_386_vt - R_386_ext2)) | |
f3185997 | 384 | return NULL; |
06614111 NC |
385 | /* PR 17512: file: 0f67f69d. */ |
386 | if (elf_howto_table [indx].type != r_type) | |
387 | return NULL; | |
142411ca L |
388 | return &elf_howto_table[indx]; |
389 | } | |
390 | ||
f3185997 NC |
391 | static bfd_boolean |
392 | elf_i386_info_to_howto_rel (bfd *abfd, | |
142411ca L |
393 | arelent *cache_ptr, |
394 | Elf_Internal_Rela *dst) | |
395 | { | |
396 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
f3185997 | 397 | |
b366503e | 398 | if ((cache_ptr->howto = elf_i386_rtype_to_howto (r_type)) == NULL) |
f3185997 NC |
399 | { |
400 | /* xgettext:c-format */ | |
401 | _bfd_error_handler (_("%pB: unsupported relocation type %#x"), | |
402 | abfd, r_type); | |
403 | bfd_set_error (bfd_error_bad_value); | |
404 | return FALSE; | |
405 | } | |
406 | ||
407 | return TRUE; | |
252b5132 RH |
408 | } |
409 | ||
410 | /* Return whether a symbol name implies a local label. The UnixWare | |
411 | 2.1 cc generates temporary symbols that start with .X, so we | |
412 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
413 | If so, we should move the .X recognition into | |
414 | _bfd_elf_is_local_label_name. */ | |
415 | ||
b34976b6 | 416 | static bfd_boolean |
55fd94b0 | 417 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
418 | { |
419 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 420 | return TRUE; |
252b5132 RH |
421 | |
422 | return _bfd_elf_is_local_label_name (abfd, name); | |
423 | } | |
424 | \f | |
38701953 | 425 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 426 | |
b34976b6 | 427 | static bfd_boolean |
55fd94b0 | 428 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
429 | { |
430 | int offset; | |
eea6121a | 431 | size_t size; |
38701953 | 432 | |
61adc1a4 | 433 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 434 | { |
61adc1a4 NC |
435 | int pr_version = bfd_get_32 (abfd, note->descdata); |
436 | ||
437 | if (pr_version != 1) | |
07d6d2b8 | 438 | return FALSE; |
61adc1a4 NC |
439 | |
440 | /* pr_cursig */ | |
228e534f | 441 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
442 | |
443 | /* pr_pid */ | |
228e534f | 444 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
445 | |
446 | /* pr_reg */ | |
447 | offset = 28; | |
eea6121a | 448 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
449 | } |
450 | else | |
451 | { | |
452 | switch (note->descsz) | |
453 | { | |
454 | default: | |
455 | return FALSE; | |
38701953 | 456 | |
61adc1a4 NC |
457 | case 144: /* Linux/i386 */ |
458 | /* pr_cursig */ | |
228e534f | 459 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 460 | |
61adc1a4 | 461 | /* pr_pid */ |
228e534f | 462 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 463 | |
61adc1a4 NC |
464 | /* pr_reg */ |
465 | offset = 72; | |
eea6121a | 466 | size = 68; |
38701953 | 467 | |
61adc1a4 NC |
468 | break; |
469 | } | |
38701953 AM |
470 | } |
471 | ||
472 | /* Make a ".reg/999" section. */ | |
473 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 474 | size, note->descpos + offset); |
38701953 AM |
475 | } |
476 | ||
b34976b6 | 477 | static bfd_boolean |
55fd94b0 | 478 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 479 | { |
61adc1a4 | 480 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 481 | { |
61adc1a4 NC |
482 | int pr_version = bfd_get_32 (abfd, note->descdata); |
483 | ||
484 | if (pr_version != 1) | |
b34976b6 | 485 | return FALSE; |
38701953 | 486 | |
228e534f | 487 | elf_tdata (abfd)->core->program |
61adc1a4 | 488 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 489 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
490 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
491 | } | |
492 | else | |
493 | { | |
494 | switch (note->descsz) | |
495 | { | |
496 | default: | |
497 | return FALSE; | |
498 | ||
499 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 500 | elf_tdata (abfd)->core->pid |
261b8d08 | 501 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 502 | elf_tdata (abfd)->core->program |
61adc1a4 | 503 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 504 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
505 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
506 | } | |
38701953 AM |
507 | } |
508 | ||
509 | /* Note that for some reason, a spurious space is tacked | |
510 | onto the end of the args in some (at least one anyway) | |
511 | implementations, so strip it off if it exists. */ | |
38701953 | 512 | { |
228e534f | 513 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
514 | int n = strlen (command); |
515 | ||
516 | if (0 < n && command[n - 1] == ' ') | |
517 | command[n - 1] = '\0'; | |
518 | } | |
519 | ||
b34976b6 | 520 | return TRUE; |
38701953 AM |
521 | } |
522 | \f | |
523 | /* Functions for the i386 ELF linker. | |
524 | ||
525 | In order to gain some understanding of code in this file without | |
526 | knowing all the intricate details of the linker, note the | |
527 | following: | |
528 | ||
529 | Functions named elf_i386_* are called by external routines, other | |
530 | functions are only called locally. elf_i386_* functions appear | |
531 | in this file more or less in the order in which they are called | |
532 | from external routines. eg. elf_i386_check_relocs is called | |
533 | early in the link process, elf_i386_finish_dynamic_sections is | |
534 | one of the last functions. */ | |
535 | ||
f604c2a2 | 536 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 537 | |
f604c2a2 | 538 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 539 | |
f604c2a2 L |
540 | /* The size in bytes of an entry in the non-lazy procedure linkage |
541 | table. */ | |
252b5132 | 542 | |
f604c2a2 L |
543 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
544 | ||
545 | /* The first entry in an absolute lazy procedure linkage table looks | |
546 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
547 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
548 | ||
549 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
550 | { |
551 | 0xff, 0x35, /* pushl contents of address */ | |
552 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
553 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 554 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
555 | }; |
556 | ||
f604c2a2 L |
557 | /* Subsequent entries in an absolute lazy procedure linkage table look |
558 | like this. */ | |
252b5132 | 559 | |
f604c2a2 | 560 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
561 | { |
562 | 0xff, 0x25, /* jmp indirect */ | |
563 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
564 | 0x68, /* pushl immediate */ | |
565 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
566 | 0xe9, /* jmp relative */ | |
567 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
568 | }; | |
569 | ||
f604c2a2 L |
570 | /* The first entry in a PIC lazy procedure linkage table look like |
571 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
572 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 573 | |
f604c2a2 | 574 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
575 | { |
576 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 577 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
578 | }; |
579 | ||
f604c2a2 L |
580 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
581 | this. */ | |
252b5132 | 582 | |
f604c2a2 | 583 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
584 | { |
585 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
586 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
587 | 0x68, /* pushl immediate */ | |
588 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
589 | 0xe9, /* jmp relative */ | |
590 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
591 | }; | |
592 | ||
f604c2a2 | 593 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 594 | |
f604c2a2 | 595 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
596 | { |
597 | 0xff, 0x25, /* jmp indirect */ | |
598 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
599 | 0x66, 0x90 /* xchg %ax,%ax */ | |
600 | }; | |
601 | ||
f604c2a2 L |
602 | /* Entries in the PIC non-lazy procedure linkage table look like |
603 | this. */ | |
dd7e64d4 | 604 | |
f604c2a2 | 605 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
606 | { |
607 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
608 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
609 | 0x66, 0x90 /* xchg %ax,%ax */ | |
610 | }; | |
611 | ||
ee2fdd6f L |
612 | /* The first entry in an absolute IBT-enabled lazy procedure linkage |
613 | table looks like this. */ | |
614 | ||
615 | static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
616 | { | |
07d6d2b8 AM |
617 | 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */ |
618 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */ | |
619 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
620 | }; |
621 | ||
622 | /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage | |
623 | table look like this. Subsequent entries for a PIC IBT-enabled lazy | |
624 | procedure linkage table are the same. */ | |
625 | ||
626 | static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
627 | { | |
07d6d2b8 AM |
628 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
629 | 0x68, 0, 0, 0, 0, /* pushl immediate */ | |
630 | 0xe9, 0, 0, 0, 0, /* jmp relative */ | |
631 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
632 | }; |
633 | ||
634 | /* The first entry in a PIC IBT-enabled lazy procedure linkage table | |
635 | look like. */ | |
636 | ||
637 | static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
638 | { | |
639 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
07d6d2b8 AM |
640 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ |
641 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
642 | }; |
643 | ||
644 | /* Entries for branches with IBT-enabled in the absolute non-lazey | |
645 | procedure linkage table look like this. They have the same size | |
646 | as the lazy PLT entry. */ | |
647 | ||
648 | static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
649 | { | |
07d6d2b8 | 650 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
651 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */ |
652 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
653 | }; | |
654 | ||
655 | /* Entries for branches with IBT-enabled in the PIC non-lazey procedure | |
656 | linkage table look like this. They have the same size as the lazy | |
657 | PLT entry. */ | |
658 | ||
659 | static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
660 | { | |
07d6d2b8 | 661 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
662 | 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */ |
663 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
664 | }; | |
665 | ||
f604c2a2 | 666 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 667 | |
f604c2a2 | 668 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 | 669 | { |
e41b3a13 JJ |
670 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
671 | 0, 0, 0, 0, /* CIE ID */ | |
672 | 1, /* CIE version */ | |
673 | 'z', 'R', 0, /* Augmentation string */ | |
674 | 1, /* Code alignment factor */ | |
675 | 0x7c, /* Data alignment factor */ | |
676 | 8, /* Return address column */ | |
677 | 1, /* Augmentation size */ | |
678 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
679 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
680 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
681 | DW_CFA_nop, DW_CFA_nop, | |
682 | ||
683 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
684 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
685 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
686 | 0, 0, 0, 0, /* .plt size goes here */ | |
687 | 0, /* Augmentation size */ | |
688 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
689 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
690 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
691 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
692 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
693 | 11, /* Block length */ | |
694 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
695 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
696 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 697 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
698 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
699 | }; | |
700 | ||
ee2fdd6f L |
701 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
702 | ||
703 | static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] = | |
704 | { | |
705 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
706 | 0, 0, 0, 0, /* CIE ID */ | |
707 | 1, /* CIE version */ | |
708 | 'z', 'R', 0, /* Augmentation string */ | |
709 | 1, /* Code alignment factor */ | |
710 | 0x7c, /* Data alignment factor */ | |
711 | 8, /* Return address column */ | |
712 | 1, /* Augmentation size */ | |
713 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
714 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
715 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
716 | DW_CFA_nop, DW_CFA_nop, | |
717 | ||
718 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
719 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
720 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
721 | 0, 0, 0, 0, /* .plt size goes here */ | |
722 | 0, /* Augmentation size */ | |
723 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
724 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
725 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
726 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
727 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
728 | 11, /* Block length */ | |
729 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
730 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
731 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
732 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
733 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
734 | }; | |
735 | ||
f604c2a2 | 736 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 737 | |
f604c2a2 | 738 | static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] = |
fff53dae L |
739 | { |
740 | #define PLT_GOT_FDE_LENGTH 16 | |
741 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
742 | 0, 0, 0, 0, /* CIE ID */ | |
743 | 1, /* CIE version */ | |
744 | 'z', 'R', 0, /* Augmentation string */ | |
745 | 1, /* Code alignment factor */ | |
746 | 0x7c, /* Data alignment factor */ | |
747 | 8, /* Return address column */ | |
748 | 1, /* Augmentation size */ | |
749 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
750 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
751 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
752 | DW_CFA_nop, DW_CFA_nop, | |
753 | ||
754 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
755 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
f604c2a2 L |
756 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
757 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
758 | 0, /* Augmentation size */ |
759 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
760 | }; | |
761 | ||
25e762b9 | 762 | /* These are the standard parameters. */ |
765e526c | 763 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt = |
25e762b9 | 764 | { |
07d6d2b8 AM |
765 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
766 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
767 | elf_i386_lazy_plt_entry, /* plt_entry */ | |
768 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
769 | NULL, /* plt_tlsdesc_entry */ |
770 | 0, /* plt_tlsdesc_entry_size*/ | |
771 | 0, /* plt_tlsdesc_got1_offset */ | |
772 | 0, /* plt_tlsdesc_got2_offset */ | |
773 | 0, /* plt_tlsdesc_got1_insn_end */ | |
774 | 0, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
775 | 2, /* plt0_got1_offset */ |
776 | 8, /* plt0_got2_offset */ | |
777 | 0, /* plt0_got2_insn_end */ | |
778 | 2, /* plt_got_offset */ | |
779 | 7, /* plt_reloc_offset */ | |
780 | 12, /* plt_plt_offset */ | |
781 | 0, /* plt_got_insn_size */ | |
782 | 0, /* plt_plt_insn_end */ | |
783 | 6, /* plt_lazy_offset */ | |
784 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ | |
785 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
786 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 L |
787 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
788 | }; | |
789 | ||
765e526c | 790 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt = |
f604c2a2 | 791 | { |
07d6d2b8 AM |
792 | elf_i386_non_lazy_plt_entry, /* plt_entry */ |
793 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
794 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
795 | 2, /* plt_got_offset */ | |
796 | 0, /* plt_got_insn_size */ | |
797 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 | 798 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
25e762b9 | 799 | }; |
ee2fdd6f | 800 | |
765e526c | 801 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt = |
ee2fdd6f | 802 | { |
07d6d2b8 | 803 | elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */ |
ee2fdd6f | 804 | sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */ |
07d6d2b8 AM |
805 | elf_i386_lazy_ibt_plt_entry, /* plt_entry */ |
806 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
807 | NULL, /* plt_tlsdesc_entry */ |
808 | 0, /* plt_tlsdesc_entry_size*/ | |
809 | 0, /* plt_tlsdesc_got1_offset */ | |
810 | 0, /* plt_tlsdesc_got2_offset */ | |
811 | 0, /* plt_tlsdesc_got1_insn_end */ | |
812 | 0, /* plt_tlsdesc_got2_insn_end */ | |
07d6d2b8 AM |
813 | 2, /* plt0_got1_offset */ |
814 | 8, /* plt0_got2_offset */ | |
815 | 0, /* plt0_got2_insn_end */ | |
816 | 4+2, /* plt_got_offset */ | |
817 | 4+1, /* plt_reloc_offset */ | |
818 | 4+6, /* plt_plt_offset */ | |
819 | 0, /* plt_got_insn_size */ | |
820 | 0, /* plt_plt_insn_end */ | |
821 | 0, /* plt_lazy_offset */ | |
822 | elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */ | |
823 | elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
824 | elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
825 | sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
826 | }; | |
827 | ||
765e526c | 828 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt = |
ee2fdd6f | 829 | { |
07d6d2b8 | 830 | elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */ |
ee2fdd6f | 831 | elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */ |
07d6d2b8 AM |
832 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
833 | 4+2, /* plt_got_offset */ | |
834 | 0, /* plt_got_insn_size */ | |
835 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
836 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
837 | }; | |
25e762b9 RM |
838 | \f |
839 | ||
eac338cf PB |
840 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
841 | for the PLTResolve stub and then for each PLT entry. */ | |
842 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
843 | #define PLTRESOLVE_RELOCS 2 | |
844 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
845 | ||
142411ca L |
846 | /* Return TRUE if the TLS access code sequence support transition |
847 | from R_TYPE. */ | |
848 | ||
849 | static bfd_boolean | |
bedfd056 | 850 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
851 | bfd_byte *contents, |
852 | Elf_Internal_Shdr *symtab_hdr, | |
853 | struct elf_link_hash_entry **sym_hashes, | |
854 | unsigned int r_type, | |
855 | const Elf_Internal_Rela *rel, | |
856 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 857 | { |
6eaa7fb5 | 858 | unsigned int val, type, reg; |
142411ca L |
859 | unsigned long r_symndx; |
860 | struct elf_link_hash_entry *h; | |
861 | bfd_vma offset; | |
6eaa7fb5 | 862 | bfd_byte *call; |
1d4af308 | 863 | bfd_boolean indirect_call; |
142411ca | 864 | |
142411ca | 865 | offset = rel->r_offset; |
13ae64f3 | 866 | switch (r_type) |
142411ca L |
867 | { |
868 | case R_386_TLS_GD: | |
869 | case R_386_TLS_LDM: | |
870 | if (offset < 2 || (rel + 1) >= relend) | |
871 | return FALSE; | |
872 | ||
6eaa7fb5 L |
873 | indirect_call = FALSE; |
874 | call = contents + offset + 4; | |
875 | val = *(call - 5); | |
876 | type = *(call - 6); | |
142411ca L |
877 | if (r_type == R_386_TLS_GD) |
878 | { | |
09e8c3bf | 879 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
880 | leal foo@tlsgd(,%ebx,1), %eax |
881 | call ___tls_get_addr@PLT | |
882 | or | |
883 | leal foo@tlsgd(%ebx) %eax | |
884 | call ___tls_get_addr@PLT | |
885 | nop | |
886 | or | |
887 | leal foo@tlsgd(%reg), %eax | |
888 | call *___tls_get_addr@GOT(%reg) | |
889 | which may be converted to | |
890 | addr32 call ___tls_get_addr | |
142411ca | 891 | can transit to different access model. */ |
6eaa7fb5 L |
892 | if ((offset + 10) > sec->size |
893 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
894 | return FALSE; |
895 | ||
142411ca L |
896 | if (type == 0x04) |
897 | { | |
6eaa7fb5 L |
898 | /* leal foo@tlsgd(,%ebx,1), %eax |
899 | call ___tls_get_addr@PLT */ | |
142411ca L |
900 | if (offset < 3) |
901 | return FALSE; | |
902 | ||
6eaa7fb5 L |
903 | if (*(call - 7) != 0x8d |
904 | || val != 0x1d | |
905 | || call[0] != 0xe8) | |
142411ca L |
906 | return FALSE; |
907 | } | |
908 | else | |
909 | { | |
6eaa7fb5 L |
910 | /* This must be |
911 | leal foo@tlsgd(%ebx), %eax | |
912 | call ___tls_get_addr@PLT | |
913 | nop | |
914 | or | |
915 | leal foo@tlsgd(%reg), %eax | |
916 | call *___tls_get_addr@GOT(%reg) | |
917 | which may be converted to | |
918 | addr32 call ___tls_get_addr | |
919 | ||
920 | %eax can't be used as the GOT base register since it | |
921 | is used to pass parameter to ___tls_get_addr. */ | |
922 | reg = val & 7; | |
923 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
924 | return FALSE; |
925 | ||
6eaa7fb5 L |
926 | indirect_call = call[0] == 0xff; |
927 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
928 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
929 | && !(indirect_call | |
930 | && (call[1] & 0xf8) == 0x90 | |
931 | && (call[1] & 0x7) == reg)) | |
142411ca L |
932 | return FALSE; |
933 | } | |
934 | } | |
935 | else | |
936 | { | |
937 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
938 | leal foo@tlsldm(%ebx), %eax |
939 | call ___tls_get_addr@PLT | |
940 | or | |
941 | leal foo@tlsldm(%reg), %eax | |
942 | call *___tls_get_addr@GOT(%reg) | |
943 | which may be converted to | |
944 | addr32 call ___tls_get_addr | |
142411ca L |
945 | can transit to different access model. */ |
946 | if (type != 0x8d || (offset + 9) > sec->size) | |
947 | return FALSE; | |
948 | ||
6eaa7fb5 L |
949 | /* %eax can't be used as the GOT base register since it is |
950 | used to pass parameter to ___tls_get_addr. */ | |
951 | reg = val & 7; | |
952 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 953 | return FALSE; |
142411ca | 954 | |
6eaa7fb5 L |
955 | indirect_call = call[0] == 0xff; |
956 | if (!(reg == 3 && call[0] == 0xe8) | |
957 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
958 | && !(indirect_call | |
959 | && (call[1] & 0xf8) == 0x90 | |
960 | && (call[1] & 0x7) == reg)) | |
961 | return FALSE; | |
962 | } | |
142411ca L |
963 | |
964 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
965 | if (r_symndx < symtab_hdr->sh_info) | |
966 | return FALSE; | |
967 | ||
968 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 969 | if (h == NULL |
0afcef53 | 970 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
6eaa7fb5 L |
971 | return FALSE; |
972 | else if (indirect_call) | |
973 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
974 | else | |
975 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
976 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
977 | |
978 | case R_386_TLS_IE: | |
979 | /* Check transition from IE access model: | |
980 | movl foo@indntpoff(%rip), %eax | |
981 | movl foo@indntpoff(%rip), %reg | |
982 | addl foo@indntpoff(%rip), %reg | |
983 | */ | |
984 | ||
985 | if (offset < 1 || (offset + 4) > sec->size) | |
986 | return FALSE; | |
987 | ||
988 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
989 | val = bfd_get_8 (abfd, contents + offset - 1); | |
990 | if (val == 0xa1) | |
991 | return TRUE; | |
992 | ||
993 | if (offset < 2) | |
994 | return FALSE; | |
995 | ||
996 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
997 | type = bfd_get_8 (abfd, contents + offset - 2); | |
998 | return ((type == 0x8b || type == 0x03) | |
999 | && (val & 0xc7) == 0x05); | |
1000 | ||
1001 | case R_386_TLS_GOTIE: | |
1002 | case R_386_TLS_IE_32: | |
1003 | /* Check transition from {IE_32,GOTIE} access model: | |
1004 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1005 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1006 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1007 | */ | |
1008 | ||
1009 | if (offset < 2 || (offset + 4) > sec->size) | |
1010 | return FALSE; | |
1011 | ||
1012 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1013 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1014 | return FALSE; | |
1015 | ||
1016 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1017 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1018 | ||
1019 | case R_386_TLS_GOTDESC: | |
1020 | /* Check transition from GDesc access model: | |
1021 | leal x@tlsdesc(%ebx), %eax | |
1022 | ||
1023 | Make sure it's a leal adding ebx to a 32-bit offset | |
1024 | into any register, although it's probably almost always | |
1025 | going to be eax. */ | |
1026 | ||
1027 | if (offset < 2 || (offset + 4) > sec->size) | |
1028 | return FALSE; | |
1029 | ||
1030 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1031 | return FALSE; | |
1032 | ||
1033 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1034 | return (val & 0xc7) == 0x83; | |
1035 | ||
1036 | case R_386_TLS_DESC_CALL: | |
1037 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1038 | call *x@tlsdesc(%eax) |
142411ca L |
1039 | */ |
1040 | if (offset + 2 <= sec->size) | |
1041 | { | |
6eaa7fb5 L |
1042 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1043 | call = contents + offset; | |
1044 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1045 | } |
1046 | ||
1047 | return FALSE; | |
1048 | ||
1049 | default: | |
1050 | abort (); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | /* Return TRUE if the TLS access transition is OK or no transition | |
1055 | will be performed. Update R_TYPE if there is a transition. */ | |
1056 | ||
1057 | static bfd_boolean | |
1058 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1059 | asection *sec, bfd_byte *contents, | |
1060 | Elf_Internal_Shdr *symtab_hdr, | |
1061 | struct elf_link_hash_entry **sym_hashes, | |
1062 | unsigned int *r_type, int tls_type, | |
1063 | const Elf_Internal_Rela *rel, | |
1064 | const Elf_Internal_Rela *relend, | |
4c544807 | 1065 | struct elf_link_hash_entry *h, |
bedfd056 L |
1066 | unsigned long r_symndx, |
1067 | bfd_boolean from_relocate_section) | |
142411ca L |
1068 | { |
1069 | unsigned int from_type = *r_type; | |
1070 | unsigned int to_type = from_type; | |
1071 | bfd_boolean check = TRUE; | |
1072 | ||
bb1cb422 L |
1073 | /* Skip TLS transition for functions. */ |
1074 | if (h != NULL | |
1075 | && (h->type == STT_FUNC | |
1076 | || h->type == STT_GNU_IFUNC)) | |
1077 | return TRUE; | |
1078 | ||
142411ca | 1079 | switch (from_type) |
13ae64f3 JJ |
1080 | { |
1081 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1082 | case R_386_TLS_GOTDESC: |
1083 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1084 | case R_386_TLS_IE_32: |
37e55690 JJ |
1085 | case R_386_TLS_IE: |
1086 | case R_386_TLS_GOTIE: | |
0e1862bb | 1087 | if (bfd_link_executable (info)) |
142411ca L |
1088 | { |
1089 | if (h == NULL) | |
1090 | to_type = R_386_TLS_LE_32; | |
1091 | else if (from_type != R_386_TLS_IE | |
1092 | && from_type != R_386_TLS_GOTIE) | |
1093 | to_type = R_386_TLS_IE_32; | |
1094 | } | |
1095 | ||
bedfd056 L |
1096 | /* When we are called from elf_i386_relocate_section, there may |
1097 | be additional transitions based on TLS_TYPE. */ | |
1098 | if (from_relocate_section) | |
142411ca L |
1099 | { |
1100 | unsigned int new_to_type = to_type; | |
1101 | ||
51537393 | 1102 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1103 | new_to_type = R_386_TLS_LE_32; |
1104 | ||
1105 | if (to_type == R_386_TLS_GD | |
1106 | || to_type == R_386_TLS_GOTDESC | |
1107 | || to_type == R_386_TLS_DESC_CALL) | |
1108 | { | |
1109 | if (tls_type == GOT_TLS_IE_POS) | |
1110 | new_to_type = R_386_TLS_GOTIE; | |
1111 | else if (tls_type & GOT_TLS_IE) | |
1112 | new_to_type = R_386_TLS_IE_32; | |
1113 | } | |
1114 | ||
1115 | /* We checked the transition before when we were called from | |
1116 | elf_i386_check_relocs. We only want to check the new | |
1117 | transition which hasn't been checked before. */ | |
1118 | check = new_to_type != to_type && from_type == to_type; | |
1119 | to_type = new_to_type; | |
1120 | } | |
1121 | ||
1122 | break; | |
1123 | ||
13ae64f3 | 1124 | case R_386_TLS_LDM: |
0e1862bb | 1125 | if (bfd_link_executable (info)) |
142411ca L |
1126 | to_type = R_386_TLS_LE_32; |
1127 | break; | |
1128 | ||
1129 | default: | |
1130 | return TRUE; | |
1131 | } | |
1132 | ||
1133 | /* Return TRUE if there is no transition. */ | |
1134 | if (from_type == to_type) | |
1135 | return TRUE; | |
1136 | ||
1137 | /* Check if the transition can be performed. */ | |
1138 | if (check | |
bedfd056 | 1139 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1140 | symtab_hdr, sym_hashes, |
1141 | from_type, rel, relend)) | |
1142 | { | |
2f629d23 | 1143 | reloc_howto_type *from, *to; |
4c544807 | 1144 | const char *name; |
142411ca | 1145 | |
b366503e L |
1146 | from = elf_i386_rtype_to_howto (from_type); |
1147 | to = elf_i386_rtype_to_howto (to_type); | |
142411ca | 1148 | |
4c544807 L |
1149 | if (h) |
1150 | name = h->root.root.string; | |
1151 | else | |
1152 | { | |
0afcef53 | 1153 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1154 | |
0afcef53 | 1155 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1156 | if (htab == NULL) |
1157 | name = "*unknown*"; | |
1158 | else | |
1159 | { | |
1160 | Elf_Internal_Sym *isym; | |
1161 | ||
1162 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1163 | abfd, r_symndx); | |
1164 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1165 | } | |
4c544807 L |
1166 | } |
1167 | ||
4eca0228 | 1168 | _bfd_error_handler |
695344c0 | 1169 | /* xgettext:c-format */ |
2dcf00ce AM |
1170 | (_("%pB: TLS transition from %s to %s against `%s'" |
1171 | " at %#" PRIx64 " in section `%pA' failed"), | |
c08bb8dd | 1172 | abfd, from->name, to->name, name, |
2dcf00ce | 1173 | (uint64_t) rel->r_offset, sec); |
142411ca L |
1174 | bfd_set_error (bfd_error_bad_value); |
1175 | return FALSE; | |
13ae64f3 JJ |
1176 | } |
1177 | ||
142411ca L |
1178 | *r_type = to_type; |
1179 | return TRUE; | |
13ae64f3 JJ |
1180 | } |
1181 | ||
c175a657 L |
1182 | /* With the local symbol, foo, we convert |
1183 | mov foo@GOT[(%reg1)], %reg2 | |
1184 | to | |
1185 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1186 | and convert | |
1187 | call/jmp *foo@GOT[(%reg)] | |
1188 | to | |
1189 | nop call foo/jmp foo nop | |
1190 | When PIC is false, convert | |
1191 | test %reg1, foo@GOT[(%reg2)] | |
1192 | to | |
1193 | test $foo, %reg1 | |
1194 | and convert | |
1195 | binop foo@GOT[(%reg1)], %reg2 | |
1196 | to | |
1197 | binop $foo, %reg2 | |
1198 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1199 | instructions. */ | |
1200 | ||
1201 | static | |
1202 | bfd_boolean | |
1203 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1204 | bfd_byte *contents, | |
6999821f | 1205 | unsigned int *r_type_p, |
c175a657 L |
1206 | Elf_Internal_Rela *irel, |
1207 | struct elf_link_hash_entry *h, | |
5e5e02ae | 1208 | bfd_boolean *converted, |
c175a657 L |
1209 | struct bfd_link_info *link_info) |
1210 | { | |
0afcef53 | 1211 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1212 | unsigned int opcode; |
1213 | unsigned int modrm; | |
1214 | bfd_boolean baseless; | |
1215 | Elf_Internal_Sym *isym; | |
1216 | unsigned int addend; | |
1217 | unsigned int nop; | |
1218 | bfd_vma nop_offset; | |
1219 | bfd_boolean is_pic; | |
1220 | bfd_boolean to_reloc_32; | |
382aae06 | 1221 | bfd_boolean abs_symbol; |
c175a657 L |
1222 | unsigned int r_type; |
1223 | unsigned int r_symndx; | |
1224 | bfd_vma roff = irel->r_offset; | |
0a27fed7 L |
1225 | bfd_boolean local_ref; |
1226 | struct elf_x86_link_hash_entry *eh; | |
c175a657 L |
1227 | |
1228 | if (roff < 2) | |
1229 | return TRUE; | |
1230 | ||
7d4d9709 | 1231 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1232 | addend = bfd_get_32 (abfd, contents + roff); |
1233 | if (addend != 0) | |
1234 | return TRUE; | |
1235 | ||
0afcef53 | 1236 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
c175a657 L |
1237 | is_pic = bfd_link_pic (link_info); |
1238 | ||
6999821f | 1239 | r_type = *r_type_p; |
c175a657 L |
1240 | r_symndx = ELF32_R_SYM (irel->r_info); |
1241 | ||
1242 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1243 | baseless = (modrm & 0xc7) == 0x5; | |
1244 | ||
382aae06 L |
1245 | if (h) |
1246 | { | |
1247 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ | |
1248 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
1249 | isym = NULL; | |
1250 | abs_symbol = ABS_SYMBOL_P (h); | |
1251 | } | |
1252 | else | |
1253 | { | |
1254 | local_ref = TRUE; | |
1255 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1256 | r_symndx); | |
1257 | abs_symbol = isym->st_shndx == SHN_ABS; | |
1258 | } | |
1259 | ||
7d4d9709 | 1260 | if (baseless && is_pic) |
c175a657 L |
1261 | { |
1262 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1263 | since we don't know what the GOT base is. */ |
c175a657 L |
1264 | const char *name; |
1265 | ||
1266 | if (h == NULL) | |
382aae06 | 1267 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); |
c175a657 L |
1268 | else |
1269 | name = h->root.root.string; | |
1270 | ||
4eca0228 | 1271 | _bfd_error_handler |
695344c0 | 1272 | /* xgettext:c-format */ |
871b3ab2 | 1273 | (_("%pB: direct GOT relocation R_386_GOT32X against `%s' without base" |
63a5468a | 1274 | " register can not be used when making a shared object"), |
c175a657 L |
1275 | abfd, name); |
1276 | return FALSE; | |
1277 | } | |
1278 | ||
1279 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1280 | ||
c175a657 L |
1281 | /* Convert to R_386_32 if PIC is false or there is no base |
1282 | register. */ | |
1283 | to_reloc_32 = !is_pic || baseless; | |
1284 | ||
0a27fed7 L |
1285 | eh = elf_x86_hash_entry (h); |
1286 | ||
7d4d9709 L |
1287 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1288 | reloc. */ | |
c175a657 L |
1289 | if (h == NULL) |
1290 | { | |
1291 | if (opcode == 0x0ff) | |
1292 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1293 | goto convert_branch; | |
1294 | else | |
1295 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1296 | "test %reg1, foo@GOT(%reg2)" and | |
1297 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1298 | goto convert_load; | |
1299 | } | |
1300 | ||
1301 | /* Undefined weak symbol is only bound locally in executable | |
1302 | and its reference is resolved as 0. */ | |
0a27fed7 L |
1303 | if (h->root.type == bfd_link_hash_undefweak |
1304 | && !eh->linker_def | |
1305 | && local_ref) | |
c175a657 L |
1306 | { |
1307 | if (opcode == 0xff) | |
1308 | { | |
1309 | /* No direct branch to 0 for PIC. */ | |
1310 | if (is_pic) | |
1311 | return TRUE; | |
1312 | else | |
1313 | goto convert_branch; | |
1314 | } | |
1315 | else | |
1316 | { | |
1317 | /* We can convert load of address 0 to R_386_32. */ | |
1318 | to_reloc_32 = TRUE; | |
1319 | goto convert_load; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | if (opcode == 0xff) | |
1324 | { | |
1325 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1326 | if ((h->root.type == bfd_link_hash_defined | |
1327 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1328 | && local_ref) |
c175a657 L |
1329 | { |
1330 | /* The function is locally defined. */ | |
dc1e8a47 | 1331 | convert_branch: |
c175a657 L |
1332 | /* Convert R_386_GOT32X to R_386_PC32. */ |
1333 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1334 | { | |
1335 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
1336 | is a nop prefix. */ | |
1337 | modrm = 0xe8; | |
6eaa7fb5 L |
1338 | /* To support TLS optimization, always use addr32 prefix |
1339 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1d4af308 | 1340 | if (eh && eh->tls_get_addr) |
c175a657 | 1341 | { |
6eaa7fb5 L |
1342 | nop = 0x67; |
1343 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1344 | } |
1345 | else | |
6eaa7fb5 | 1346 | { |
5b9c07b2 L |
1347 | nop = htab->params->call_nop_byte; |
1348 | if (htab->params->call_nop_as_suffix) | |
6eaa7fb5 L |
1349 | { |
1350 | nop_offset = roff + 3; | |
1351 | irel->r_offset -= 1; | |
1352 | } | |
1353 | else | |
1354 | nop_offset = roff - 2; | |
1355 | } | |
c175a657 L |
1356 | } |
1357 | else | |
1358 | { | |
1359 | /* Convert to "jmp foo nop". */ | |
1360 | modrm = 0xe9; | |
1361 | nop = NOP_OPCODE; | |
1362 | nop_offset = roff + 3; | |
1363 | irel->r_offset -= 1; | |
1364 | } | |
1365 | ||
1366 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1367 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1368 | /* When converting to PC-relative relocation, we | |
1369 | need to adjust addend by -4. */ | |
1370 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1371 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
6999821f | 1372 | *r_type_p = R_386_PC32; |
5e5e02ae | 1373 | *converted = TRUE; |
c175a657 L |
1374 | } |
1375 | } | |
1376 | else | |
1377 | { | |
1378 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1379 | "test %reg1, foo@GOT(%reg2)" and | |
1380 | "binop foo@GOT[(%reg1)], %reg2". | |
1381 | ||
1382 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1383 | link-time address. */ | |
1384 | if (h == htab->elf.hdynamic) | |
1385 | return TRUE; | |
1386 | ||
1387 | /* def_regular is set by an assignment in a linker script in | |
cbd0eecf L |
1388 | bfd_elf_record_link_assignment. start_stop is set on |
1389 | __start_SECNAME/__stop_SECNAME which mark section SECNAME. */ | |
1390 | if (h->start_stop | |
0a27fed7 | 1391 | || eh->linker_def |
cbd0eecf L |
1392 | || ((h->def_regular |
1393 | || h->root.type == bfd_link_hash_defined | |
1394 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1395 | && local_ref)) |
c175a657 | 1396 | { |
dc1e8a47 | 1397 | convert_load: |
c175a657 L |
1398 | if (opcode == 0x8b) |
1399 | { | |
382aae06 L |
1400 | if (abs_symbol && local_ref) |
1401 | to_reloc_32 = TRUE; | |
1402 | ||
c175a657 L |
1403 | if (to_reloc_32) |
1404 | { | |
1405 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1406 | "mov $foo, %reg2" with R_386_32. */ | |
1407 | r_type = R_386_32; | |
1408 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1409 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1410 | opcode = 0xc7; | |
1411 | } | |
1412 | else | |
1413 | { | |
1414 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1415 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1416 | r_type = R_386_GOTOFF; | |
1417 | opcode = 0x8d; | |
1418 | } | |
1419 | } | |
1420 | else | |
1421 | { | |
1422 | /* Only R_386_32 is supported. */ | |
1423 | if (!to_reloc_32) | |
1424 | return TRUE; | |
1425 | ||
1426 | if (opcode == 0x85) | |
1427 | { | |
1428 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1429 | "test $foo, %reg1". */ | |
1430 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1431 | opcode = 0xf7; | |
1432 | } | |
1433 | else | |
1434 | { | |
1435 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1436 | "binop $foo, %reg2". */ | |
1437 | modrm = (0xc0 | |
1438 | | (modrm & 0x38) >> 3 | |
1439 | | (opcode & 0x3c)); | |
1440 | opcode = 0x81; | |
1441 | } | |
1442 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1443 | r_type = R_386_32; | |
1444 | } | |
1445 | ||
1446 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1447 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
6999821f | 1448 | *r_type_p = r_type; |
5e5e02ae | 1449 | *converted = TRUE; |
c175a657 L |
1450 | } |
1451 | } | |
1452 | ||
1453 | return TRUE; | |
1454 | } | |
1455 | ||
c1d11331 L |
1456 | /* Rename some of the generic section flags to better document how they |
1457 | are used here. */ | |
6999821f | 1458 | #define check_relocs_failed sec_flg0 |
c1d11331 | 1459 | |
252b5132 | 1460 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1461 | calculate needed space in the global offset table, procedure linkage |
1462 | table, and dynamic reloc sections. */ | |
252b5132 | 1463 | |
b34976b6 | 1464 | static bfd_boolean |
55fd94b0 AM |
1465 | elf_i386_check_relocs (bfd *abfd, |
1466 | struct bfd_link_info *info, | |
1467 | asection *sec, | |
1468 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1469 | { |
0afcef53 | 1470 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1471 | Elf_Internal_Shdr *symtab_hdr; |
1472 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1473 | const Elf_Internal_Rela *rel; |
1474 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1475 | asection *sreloc; |
bedfd056 | 1476 | bfd_byte *contents; |
5e5e02ae | 1477 | bfd_boolean converted; |
252b5132 | 1478 | |
0e1862bb | 1479 | if (bfd_link_relocatable (info)) |
b34976b6 | 1480 | return TRUE; |
252b5132 | 1481 | |
0afcef53 | 1482 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 1483 | if (htab == NULL) |
c337a162 L |
1484 | { |
1485 | sec->check_relocs_failed = 1; | |
1486 | return FALSE; | |
1487 | } | |
4dfe6ac6 | 1488 | |
fe53b4a4 L |
1489 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1490 | ||
bedfd056 L |
1491 | /* Get the section contents. */ |
1492 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1493 | contents = elf_section_data (sec)->this_hdr.contents; | |
1494 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1495 | { | |
1496 | sec->check_relocs_failed = 1; | |
1497 | return FALSE; | |
1498 | } | |
1499 | ||
0ffa91dd | 1500 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1501 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1502 | |
5e5e02ae L |
1503 | converted = FALSE; |
1504 | ||
252b5132 RH |
1505 | sreloc = NULL; |
1506 | ||
1507 | rel_end = relocs + sec->reloc_count; | |
1508 | for (rel = relocs; rel < rel_end; rel++) | |
1509 | { | |
13ae64f3 | 1510 | unsigned int r_type; |
d42c267e | 1511 | unsigned int r_symndx; |
252b5132 | 1512 | struct elf_link_hash_entry *h; |
0afcef53 | 1513 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1514 | Elf_Internal_Sym *isym; |
1515 | const char *name; | |
06a6a421 | 1516 | bfd_boolean size_reloc; |
382aae06 | 1517 | bfd_boolean no_dynreloc; |
252b5132 RH |
1518 | |
1519 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1520 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1521 | |
d9bc7a44 | 1522 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1523 | { |
695344c0 | 1524 | /* xgettext:c-format */ |
871b3ab2 | 1525 | _bfd_error_handler (_("%pB: bad symbol index: %d"), |
4eca0228 | 1526 | abfd, r_symndx); |
c337a162 | 1527 | goto error_return; |
f5f31454 L |
1528 | } |
1529 | ||
252b5132 | 1530 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1531 | { |
1532 | /* A local symbol. */ | |
c2e61a4e L |
1533 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1534 | abfd, r_symndx); | |
1535 | if (isym == NULL) | |
c337a162 | 1536 | goto error_return; |
c25bc9fc L |
1537 | |
1538 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1539 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1540 | { | |
0afcef53 | 1541 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1542 | if (h == NULL) |
c337a162 | 1543 | goto error_return; |
6bbec505 | 1544 | |
c25bc9fc | 1545 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1546 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1547 | isym, NULL); | |
c25bc9fc L |
1548 | h->type = STT_GNU_IFUNC; |
1549 | h->def_regular = 1; | |
1550 | h->ref_regular = 1; | |
1551 | h->forced_local = 1; | |
1552 | h->root.type = bfd_link_hash_defined; | |
1553 | } | |
1554 | else | |
1555 | h = NULL; | |
1556 | } | |
252b5132 | 1557 | else |
71cb9464 | 1558 | { |
4c544807 | 1559 | isym = NULL; |
71cb9464 L |
1560 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1561 | while (h->root.type == bfd_link_hash_indirect | |
1562 | || h->root.type == bfd_link_hash_warning) | |
1563 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1564 | } |
cbe950e9 | 1565 | |
0afcef53 | 1566 | eh = (struct elf_x86_link_hash_entry *) h; |
c25bc9fc L |
1567 | if (h != NULL) |
1568 | { | |
f604c2a2 L |
1569 | if (r_type == R_386_GOTOFF) |
1570 | eh->gotoff_ref = 1; | |
cbe950e9 | 1571 | |
ad1e85de L |
1572 | /* It is referenced by a non-shared object. */ |
1573 | h->ref_regular = 1; | |
71cb9464 | 1574 | } |
252b5132 | 1575 | |
6999821f L |
1576 | if (r_type == R_386_GOT32X |
1577 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1578 | { | |
1579 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1580 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
5e5e02ae L |
1581 | &r_type, irel, h, |
1582 | &converted, info)) | |
6999821f L |
1583 | goto error_return; |
1584 | } | |
1585 | ||
382aae06 L |
1586 | if (!_bfd_elf_x86_valid_reloc_p (sec, info, htab, rel, h, isym, |
1587 | symtab_hdr, &no_dynreloc)) | |
1588 | return FALSE; | |
1589 | ||
bedfd056 | 1590 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1591 | symtab_hdr, sym_hashes, |
1592 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1593 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1594 | goto error_return; |
13ae64f3 | 1595 | |
cd048363 L |
1596 | /* Check if _GLOBAL_OFFSET_TABLE_ is referenced. */ |
1597 | if (h == htab->elf.hgot) | |
1598 | htab->got_referenced = TRUE; | |
1599 | ||
13ae64f3 | 1600 | switch (r_type) |
252b5132 | 1601 | { |
37e55690 | 1602 | case R_386_TLS_LDM: |
0f09b4d8 | 1603 | htab->tls_ld_or_ldm_got.refcount = 1; |
37e55690 JJ |
1604 | goto create_got; |
1605 | ||
1606 | case R_386_PLT32: | |
1607 | /* This symbol requires a procedure linkage table entry. We | |
1608 | actually build the entry in adjust_dynamic_symbol, | |
1609 | because this might be a case of linking PIC code which is | |
1610 | never referenced by a dynamic object, in which case we | |
1611 | don't need to generate a procedure linkage table entry | |
1612 | after all. */ | |
1613 | ||
1614 | /* If this is a local symbol, we resolve it directly without | |
1615 | creating a procedure linkage table entry. */ | |
1616 | if (h == NULL) | |
1617 | continue; | |
1618 | ||
98b273dc | 1619 | eh->zero_undefweak &= 0x2; |
f5385ebf | 1620 | h->needs_plt = 1; |
79b0c981 | 1621 | h->plt.refcount = 1; |
37e55690 JJ |
1622 | break; |
1623 | ||
6a3e1bae | 1624 | case R_386_SIZE32: |
06a6a421 | 1625 | size_reloc = TRUE; |
6a3e1bae L |
1626 | goto do_size; |
1627 | ||
13ae64f3 | 1628 | case R_386_TLS_IE_32: |
37e55690 JJ |
1629 | case R_386_TLS_IE: |
1630 | case R_386_TLS_GOTIE: | |
0e1862bb | 1631 | if (!bfd_link_executable (info)) |
13ae64f3 | 1632 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1633 | /* Fall through */ |
1634 | ||
252b5132 | 1635 | case R_386_GOT32: |
02a86693 | 1636 | case R_386_GOT32X: |
13ae64f3 | 1637 | case R_386_TLS_GD: |
67a4f2b7 AO |
1638 | case R_386_TLS_GOTDESC: |
1639 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1640 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1641 | { |
1642 | int tls_type, old_tls_type; | |
1643 | ||
1644 | switch (r_type) | |
1645 | { | |
1646 | default: | |
02a86693 L |
1647 | case R_386_GOT32: |
1648 | case R_386_GOT32X: | |
1649 | tls_type = GOT_NORMAL; | |
1650 | break; | |
13ae64f3 | 1651 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1652 | case R_386_TLS_GOTDESC: |
1653 | case R_386_TLS_DESC_CALL: | |
1654 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1655 | case R_386_TLS_IE_32: |
1656 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1657 | tls_type = GOT_TLS_IE_NEG; | |
1658 | else | |
ebcfb3c0 JJ |
1659 | /* If this is a GD->IE transition, we may use either of |
1660 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1661 | tls_type = GOT_TLS_IE; |
1662 | break; | |
1663 | case R_386_TLS_IE: | |
1664 | case R_386_TLS_GOTIE: | |
1665 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1666 | } |
1667 | ||
1668 | if (h != NULL) | |
1669 | { | |
0f09b4d8 | 1670 | h->got.refcount = 1; |
0afcef53 | 1671 | old_tls_type = elf_x86_hash_entry (h)->tls_type; |
13ae64f3 JJ |
1672 | } |
1673 | else | |
1674 | { | |
1675 | bfd_signed_vma *local_got_refcounts; | |
1676 | ||
1677 | /* This is a global offset table entry for a local symbol. */ | |
1678 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1679 | if (local_got_refcounts == NULL) | |
1680 | { | |
1681 | bfd_size_type size; | |
1682 | ||
1683 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1684 | size *= (sizeof (bfd_signed_vma) |
1685 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 | 1686 | local_got_refcounts = (bfd_signed_vma *) |
07d6d2b8 | 1687 | bfd_zalloc (abfd, size); |
13ae64f3 | 1688 | if (local_got_refcounts == NULL) |
c337a162 | 1689 | goto error_return; |
13ae64f3 | 1690 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1691 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1692 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1693 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1694 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 | 1695 | } |
0f09b4d8 | 1696 | local_got_refcounts[r_symndx] = 1; |
0afcef53 | 1697 | old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
13ae64f3 JJ |
1698 | } |
1699 | ||
37e55690 JJ |
1700 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1701 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1702 | /* If a TLS symbol is accessed using IE at least once, |
1703 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1704 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1705 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1706 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1707 | { |
67a4f2b7 | 1708 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1709 | tls_type = old_tls_type; |
67a4f2b7 AO |
1710 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1711 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1712 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1713 | else |
1714 | { | |
09a24cbf | 1715 | if (h) |
4c544807 L |
1716 | name = h->root.root.string; |
1717 | else | |
1718 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1719 | NULL); | |
4eca0228 | 1720 | _bfd_error_handler |
695344c0 | 1721 | /* xgettext:c-format */ |
871b3ab2 | 1722 | (_("%pB: `%s' accessed both as normal and " |
55fd94b0 | 1723 | "thread local symbol"), |
4c544807 | 1724 | abfd, name); |
68c4a57e | 1725 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 1726 | goto error_return; |
13ae64f3 JJ |
1727 | } |
1728 | } | |
1729 | ||
1730 | if (old_tls_type != tls_type) | |
1731 | { | |
1732 | if (h != NULL) | |
0afcef53 | 1733 | elf_x86_hash_entry (h)->tls_type = tls_type; |
13ae64f3 | 1734 | else |
0afcef53 | 1735 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
13ae64f3 JJ |
1736 | } |
1737 | } | |
0ac8d2ca AM |
1738 | /* Fall through */ |
1739 | ||
1740 | case R_386_GOTOFF: | |
1741 | case R_386_GOTPC: | |
dc1e8a47 | 1742 | create_got: |
37e55690 | 1743 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1744 | { |
1745 | if (eh != NULL) | |
cd048363 L |
1746 | { |
1747 | eh->zero_undefweak &= 0x2; | |
1748 | ||
1749 | /* Need GOT to resolve undefined weak symbol to 0. */ | |
1750 | if (r_type == R_386_GOTOFF | |
1751 | && h->root.type == bfd_link_hash_undefweak | |
1752 | && bfd_link_executable (info)) | |
1753 | htab->got_referenced = TRUE; | |
1754 | } | |
aec6b87e L |
1755 | break; |
1756 | } | |
37e55690 | 1757 | /* Fall through */ |
252b5132 | 1758 | |
37e55690 JJ |
1759 | case R_386_TLS_LE_32: |
1760 | case R_386_TLS_LE: | |
aec6b87e | 1761 | if (eh != NULL) |
98b273dc | 1762 | eh->zero_undefweak &= 0x2; |
0e1862bb | 1763 | if (bfd_link_executable (info)) |
37e55690 | 1764 | break; |
bffbf940 | 1765 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1766 | goto do_relocation; |
252b5132 RH |
1767 | |
1768 | case R_386_32: | |
1769 | case R_386_PC32: | |
aec6b87e | 1770 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 1771 | eh->zero_undefweak |= 0x2; |
dc1e8a47 | 1772 | do_relocation: |
bf52d7c7 L |
1773 | /* We are called after all symbols have been resolved. Only |
1774 | relocation against STT_GNU_IFUNC symbol must go through | |
1775 | PLT. */ | |
d1ed1c7d L |
1776 | if (h != NULL |
1777 | && (bfd_link_executable (info) | |
bf52d7c7 | 1778 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 1779 | { |
79b0c981 | 1780 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 1781 | |
4b627c18 L |
1782 | if (r_type == R_386_PC32) |
1783 | { | |
1784 | /* Since something like ".long foo - ." may be used | |
1785 | as pointer, make sure that PLT is used if foo is | |
1786 | a function defined in a shared library. */ | |
1787 | if ((sec->flags & SEC_CODE) == 0) | |
1788 | h->pointer_equality_needed = 1; | |
74437ea2 L |
1789 | else if (h->type == STT_GNU_IFUNC |
1790 | && bfd_link_pic (info)) | |
1791 | { | |
6322e5c5 L |
1792 | _bfd_error_handler |
1793 | /* xgettext:c-format */ | |
871b3ab2 | 1794 | (_("%pB: unsupported non-PIC call to IFUNC `%s'"), |
6322e5c5 | 1795 | abfd, h->root.root.string); |
74437ea2 L |
1796 | bfd_set_error (bfd_error_bad_value); |
1797 | goto error_return; | |
1798 | } | |
4b627c18 L |
1799 | } |
1800 | else | |
04ebc307 L |
1801 | { |
1802 | h->pointer_equality_needed = 1; | |
1803 | /* R_386_32 can be resolved at run-time. */ | |
1804 | if (r_type == R_386_32 | |
1805 | && (sec->flags & SEC_READONLY) == 0) | |
79b0c981 L |
1806 | func_pointer_ref = TRUE; |
1807 | } | |
1808 | ||
1809 | if (!func_pointer_ref) | |
1810 | { | |
1811 | /* If this reloc is in a read-only section, we might | |
1812 | need a copy reloc. We can't check reliably at this | |
1813 | stage whether the section is read-only, as input | |
1814 | sections have not yet been mapped to output sections. | |
1815 | Tentatively set the flag for now, and correct in | |
1816 | adjust_dynamic_symbol. */ | |
1817 | h->non_got_ref = 1; | |
1818 | ||
1819 | /* We may need a .plt entry if the symbol is a function | |
1820 | defined in a shared lib or is a function referenced | |
1821 | from the code or read-only section. */ | |
1822 | if (!h->def_regular | |
1823 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
1824 | h->plt.refcount = 1; | |
04ebc307 | 1825 | } |
6725bdbf | 1826 | } |
7843f00e | 1827 | |
06a6a421 | 1828 | size_reloc = FALSE; |
dc1e8a47 | 1829 | do_size: |
382aae06 L |
1830 | if (!no_dynreloc |
1831 | && NEED_DYNAMIC_RELOCATION_P (info, FALSE, h, sec, r_type, | |
1832 | R_386_32)) | |
252b5132 | 1833 | { |
e03a8ed8 L |
1834 | struct elf_dyn_relocs *p; |
1835 | struct elf_dyn_relocs **head; | |
ec338859 | 1836 | |
12d0ee4a AM |
1837 | /* We must copy these reloc types into the output file. |
1838 | Create a reloc section in dynobj and make room for | |
1839 | this reloc. */ | |
252b5132 RH |
1840 | if (sreloc == NULL) |
1841 | { | |
83bac4b0 NC |
1842 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1843 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1844 | ||
252b5132 | 1845 | if (sreloc == NULL) |
c337a162 | 1846 | goto error_return; |
252b5132 RH |
1847 | } |
1848 | ||
0c715baa AM |
1849 | /* If this is a global symbol, we count the number of |
1850 | relocations we need for this symbol. */ | |
1851 | if (h != NULL) | |
252b5132 | 1852 | { |
190eb1dd | 1853 | head = &h->dyn_relocs; |
0c715baa AM |
1854 | } |
1855 | else | |
1856 | { | |
ec338859 AM |
1857 | /* Track dynamic relocs needed for local syms too. |
1858 | We really need local syms available to do this | |
1859 | easily. Oh well. */ | |
87d72d41 | 1860 | void **vpp; |
ec338859 | 1861 | asection *s; |
87d72d41 AM |
1862 | |
1863 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1864 | abfd, r_symndx); | |
1865 | if (isym == NULL) | |
c337a162 | 1866 | goto error_return; |
87d72d41 AM |
1867 | |
1868 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1869 | if (s == NULL) |
87d72d41 | 1870 | s = sec; |
ec338859 | 1871 | |
e81d3500 | 1872 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1873 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1874 | } |
1875 | ||
1876 | p = *head; | |
1877 | if (p == NULL || p->sec != sec) | |
1878 | { | |
986f0783 | 1879 | size_t amt = sizeof *p; |
a50b1753 | 1880 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
07d6d2b8 | 1881 | amt); |
ec338859 | 1882 | if (p == NULL) |
c337a162 | 1883 | goto error_return; |
ec338859 AM |
1884 | p->next = *head; |
1885 | *head = p; | |
1886 | p->sec = sec; | |
1887 | p->count = 0; | |
1888 | p->pc_count = 0; | |
252b5132 | 1889 | } |
ec338859 AM |
1890 | |
1891 | p->count += 1; | |
06a6a421 L |
1892 | /* Count size relocation as PC-relative relocation. */ |
1893 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1894 | p->pc_count += 1; |
252b5132 | 1895 | } |
252b5132 RH |
1896 | break; |
1897 | ||
1898 | /* This relocation describes the C++ object vtable hierarchy. | |
1899 | Reconstruct it for later use during GC. */ | |
1900 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1901 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 1902 | goto error_return; |
252b5132 RH |
1903 | break; |
1904 | ||
1905 | /* This relocation describes which C++ vtable entries are actually | |
1906 | used. Record for later use during GC. */ | |
1907 | case R_386_GNU_VTENTRY: | |
a0ea3a14 | 1908 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
c337a162 | 1909 | goto error_return; |
252b5132 RH |
1910 | break; |
1911 | ||
1912 | default: | |
1913 | break; | |
1914 | } | |
1915 | } | |
1916 | ||
bedfd056 L |
1917 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1918 | { | |
5e5e02ae | 1919 | if (!converted && !info->keep_memory) |
bedfd056 L |
1920 | free (contents); |
1921 | else | |
1922 | { | |
5e5e02ae L |
1923 | /* Cache the section contents for elf_link_input_bfd if any |
1924 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
1925 | elf_section_data (sec)->this_hdr.contents = contents; |
1926 | } | |
1927 | } | |
1928 | ||
5e5e02ae L |
1929 | /* Cache relocations if any load is converted. */ |
1930 | if (elf_section_data (sec)->relocs != relocs && converted) | |
1931 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
1932 | ||
b34976b6 | 1933 | return TRUE; |
c337a162 | 1934 | |
dc1e8a47 | 1935 | error_return: |
bedfd056 L |
1936 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1937 | free (contents); | |
c337a162 L |
1938 | sec->check_relocs_failed = 1; |
1939 | return FALSE; | |
252b5132 RH |
1940 | } |
1941 | ||
38701953 AM |
1942 | /* Set the correct type for an x86 ELF section. We do this by the |
1943 | section name, which is a hack, but ought to work. */ | |
1944 | ||
b34976b6 | 1945 | static bfd_boolean |
55fd94b0 AM |
1946 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
1947 | Elf_Internal_Shdr *hdr, | |
1948 | asection *sec) | |
38701953 | 1949 | { |
91d6fa6a | 1950 | const char *name; |
38701953 | 1951 | |
fd361982 | 1952 | name = bfd_section_name (sec); |
38701953 AM |
1953 | |
1954 | /* This is an ugly, but unfortunately necessary hack that is | |
1955 | needed when producing EFI binaries on x86. It tells | |
1956 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1957 | containing ELF relocation info. We need this hack in order to | |
1958 | be able to generate ELF binaries that can be translated into | |
1959 | EFI applications (which are essentially COFF objects). Those | |
1960 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1961 | which would normally cause BFD to segfault because it would | |
1962 | attempt to interpret this section as containing relocation | |
1963 | entries for section "oc". With this hack enabled, ".reloc" | |
1964 | will be treated as a normal data section, which will avoid the | |
1965 | segfault. However, you won't be able to create an ELFNN binary | |
1966 | with a section named "oc" that needs relocations, but that's | |
1967 | the kind of ugly side-effects you get when detecting section | |
1968 | types based on their names... In practice, this limitation is | |
1969 | unlikely to bite. */ | |
1970 | if (strcmp (name, ".reloc") == 0) | |
1971 | hdr->sh_type = SHT_PROGBITS; | |
1972 | ||
b34976b6 | 1973 | return TRUE; |
38701953 AM |
1974 | } |
1975 | ||
13ae64f3 JJ |
1976 | /* Return the relocation value for @tpoff relocation |
1977 | if STT_TLS virtual address is ADDRESS. */ | |
1978 | ||
1979 | static bfd_vma | |
eb4ff4d6 | 1980 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 1981 | { |
e1918d23 | 1982 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
1983 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
1984 | bfd_vma static_tls_size; | |
13ae64f3 | 1985 | |
e1918d23 AM |
1986 | /* If tls_sec is NULL, we should have signalled an error already. */ |
1987 | if (htab->tls_sec == NULL) | |
6a30718d | 1988 | return 0; |
7dc98aea RO |
1989 | |
1990 | /* Consider special static TLS alignment requirements. */ | |
1991 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
1992 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
1993 | } |
1994 | ||
252b5132 RH |
1995 | /* Relocate an i386 ELF section. */ |
1996 | ||
b34976b6 | 1997 | static bfd_boolean |
55fd94b0 AM |
1998 | elf_i386_relocate_section (bfd *output_bfd, |
1999 | struct bfd_link_info *info, | |
2000 | bfd *input_bfd, | |
2001 | asection *input_section, | |
2002 | bfd_byte *contents, | |
2003 | Elf_Internal_Rela *relocs, | |
2004 | Elf_Internal_Sym *local_syms, | |
2005 | asection **local_sections) | |
252b5132 | 2006 | { |
0afcef53 | 2007 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
2008 | Elf_Internal_Shdr *symtab_hdr; |
2009 | struct elf_link_hash_entry **sym_hashes; | |
2010 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2011 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 2012 | Elf_Internal_Rela *rel; |
60f2e42e | 2013 | Elf_Internal_Rela *wrel; |
252b5132 | 2014 | Elf_Internal_Rela *relend; |
3348747a | 2015 | bfd_boolean is_vxworks_tls; |
25e762b9 | 2016 | unsigned plt_entry_size; |
252b5132 | 2017 | |
c337a162 L |
2018 | /* Skip if check_relocs failed. */ |
2019 | if (input_section->check_relocs_failed) | |
2020 | return FALSE; | |
2021 | ||
0afcef53 | 2022 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
2023 | if (htab == NULL) |
2024 | return FALSE; | |
fe53b4a4 | 2025 | |
7af5d5c4 AM |
2026 | if (!is_x86_elf (input_bfd, htab)) |
2027 | { | |
2028 | bfd_set_error (bfd_error_wrong_format); | |
2029 | return FALSE; | |
2030 | } | |
fe53b4a4 | 2031 | |
0ffa91dd | 2032 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
2033 | sym_hashes = elf_sym_hashes (input_bfd); |
2034 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2035 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
2036 | /* We have to handle relocations in vxworks .tls_vars sections |
2037 | specially, because the dynamic loader is 'weird'. */ | |
90c14f0c | 2038 | is_vxworks_tls = (htab->elf.target_os == is_vxworks |
07d6d2b8 | 2039 | && bfd_link_pic (info) |
3348747a NS |
2040 | && !strcmp (input_section->output_section->name, |
2041 | ".tls_vars")); | |
252b5132 | 2042 | |
0afcef53 | 2043 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2044 | |
765e526c | 2045 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 2046 | |
60f2e42e | 2047 | rel = wrel = relocs; |
252b5132 | 2048 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2049 | for (; rel < relend; wrel++, rel++) |
252b5132 | 2050 | { |
419414ea | 2051 | unsigned int r_type, r_type_tls; |
252b5132 RH |
2052 | reloc_howto_type *howto; |
2053 | unsigned long r_symndx; | |
2054 | struct elf_link_hash_entry *h; | |
0afcef53 | 2055 | struct elf_x86_link_hash_entry *eh; |
252b5132 RH |
2056 | Elf_Internal_Sym *sym; |
2057 | asection *sec; | |
dd7e64d4 | 2058 | bfd_vma off, offplt, plt_offset; |
252b5132 | 2059 | bfd_vma relocation; |
b34976b6 | 2060 | bfd_boolean unresolved_reloc; |
252b5132 | 2061 | bfd_reloc_status_type r; |
1b452ec6 | 2062 | unsigned int indx; |
13ae64f3 | 2063 | int tls_type; |
1788fc08 | 2064 | bfd_vma st_size; |
dd7e64d4 | 2065 | asection *resolved_plt; |
aec6b87e | 2066 | bfd_boolean resolved_to_zero; |
e133d005 | 2067 | bfd_boolean relative_reloc; |
252b5132 RH |
2068 | |
2069 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2070 | if (r_type == R_386_GNU_VTINHERIT |
2071 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
2072 | { |
2073 | if (wrel != rel) | |
2074 | *wrel = *rel; | |
2075 | continue; | |
2076 | } | |
dc47f327 | 2077 | |
b366503e | 2078 | howto = elf_i386_rtype_to_howto (r_type); |
76268e02 | 2079 | if (howto == NULL) |
47aeb64c NC |
2080 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
2081 | ||
252b5132 | 2082 | r_symndx = ELF32_R_SYM (rel->r_info); |
252b5132 RH |
2083 | h = NULL; |
2084 | sym = NULL; | |
2085 | sec = NULL; | |
b34976b6 | 2086 | unresolved_reloc = FALSE; |
252b5132 RH |
2087 | if (r_symndx < symtab_hdr->sh_info) |
2088 | { | |
2089 | sym = local_syms + r_symndx; | |
2090 | sec = local_sections[r_symndx]; | |
2091 | relocation = (sec->output_section->vma | |
2092 | + sec->output_offset | |
2093 | + sym->st_value); | |
1788fc08 | 2094 | st_size = sym->st_size; |
ab96bf03 AM |
2095 | |
2096 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
2097 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 2098 | || (bfd_link_relocatable (info) |
ab96bf03 | 2099 | && sec->output_offset != 0))) |
f8df10f4 | 2100 | { |
f8df10f4 | 2101 | bfd_vma addend; |
4a335f3d | 2102 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2103 | |
4a335f3d | 2104 | switch (howto->size) |
f8df10f4 | 2105 | { |
4a335f3d AM |
2106 | case 0: |
2107 | addend = bfd_get_8 (input_bfd, where); | |
2108 | if (howto->pc_relative) | |
2109 | { | |
2110 | addend = (addend ^ 0x80) - 0x80; | |
2111 | addend += 1; | |
2112 | } | |
2113 | break; | |
2114 | case 1: | |
2115 | addend = bfd_get_16 (input_bfd, where); | |
2116 | if (howto->pc_relative) | |
2117 | { | |
2118 | addend = (addend ^ 0x8000) - 0x8000; | |
2119 | addend += 2; | |
2120 | } | |
2121 | break; | |
2122 | case 2: | |
2123 | addend = bfd_get_32 (input_bfd, where); | |
2124 | if (howto->pc_relative) | |
2125 | { | |
2126 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2127 | addend += 4; | |
2128 | } | |
2129 | break; | |
2130 | default: | |
2131 | abort (); | |
f8df10f4 JJ |
2132 | } |
2133 | ||
0e1862bb | 2134 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
2135 | addend += sec->output_offset; |
2136 | else | |
2137 | { | |
2138 | asection *msec = sec; | |
2139 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
2140 | addend); | |
2141 | addend -= relocation; | |
2142 | addend += msec->output_section->vma + msec->output_offset; | |
2143 | } | |
4a335f3d AM |
2144 | |
2145 | switch (howto->size) | |
2146 | { | |
2147 | case 0: | |
16a10388 | 2148 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2149 | if (howto->pc_relative) |
2150 | addend -= 1; | |
2151 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2152 | break; |
2153 | case 1: | |
2154 | if (howto->pc_relative) | |
2155 | addend -= 2; | |
2156 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2157 | break; |
2158 | case 2: | |
2159 | if (howto->pc_relative) | |
2160 | addend -= 4; | |
2161 | bfd_put_32 (input_bfd, addend, where); | |
2162 | break; | |
2163 | } | |
f8df10f4 | 2164 | } |
0e1862bb | 2165 | else if (!bfd_link_relocatable (info) |
1f85278f | 2166 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
2167 | { |
2168 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0afcef53 L |
2169 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel, |
2170 | FALSE); | |
c25bc9fc L |
2171 | if (h == NULL) |
2172 | abort (); | |
2173 | ||
23209a78 | 2174 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2175 | h->root.u.def.value = sym->st_value; |
2176 | h->root.u.def.section = sec; | |
2177 | } | |
252b5132 RH |
2178 | } |
2179 | else | |
2180 | { | |
3d540e93 | 2181 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2182 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 2183 | |
b2a8e766 AM |
2184 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2185 | r_symndx, symtab_hdr, sym_hashes, | |
2186 | h, sec, relocation, | |
62d887d4 | 2187 | unresolved_reloc, warned, ignored); |
1788fc08 | 2188 | st_size = h->size; |
252b5132 RH |
2189 | } |
2190 | ||
dbaa2011 | 2191 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2192 | { |
2193 | _bfd_clear_contents (howto, input_bfd, input_section, | |
0930cb30 | 2194 | contents, rel->r_offset); |
60f2e42e L |
2195 | wrel->r_offset = rel->r_offset; |
2196 | wrel->r_info = 0; | |
2197 | wrel->r_addend = 0; | |
2198 | ||
2199 | /* For ld -r, remove relocations in debug sections against | |
2200 | sections defined in discarded sections. Not done for | |
2201 | eh_frame editing code expects to be present. */ | |
2202 | if (bfd_link_relocatable (info) | |
2203 | && (input_section->flags & SEC_DEBUGGING)) | |
2204 | wrel--; | |
2205 | ||
2206 | continue; | |
2207 | } | |
9635fe29 | 2208 | |
0e1862bb | 2209 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2210 | { |
2211 | if (wrel != rel) | |
2212 | *wrel = *rel; | |
2213 | continue; | |
2214 | } | |
ab96bf03 | 2215 | |
0afcef53 | 2216 | eh = (struct elf_x86_link_hash_entry *) h; |
ee2fdd6f | 2217 | |
cbe950e9 L |
2218 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2219 | it here if it is defined in a non-shared object. */ | |
2220 | if (h != NULL | |
2221 | && h->type == STT_GNU_IFUNC | |
2222 | && h->def_regular) | |
2223 | { | |
ee2fdd6f | 2224 | asection *gotplt, *base_got; |
cbe950e9 | 2225 | bfd_vma plt_index; |
4c544807 | 2226 | const char *name; |
cbe950e9 | 2227 | |
97dc35c8 L |
2228 | if ((input_section->flags & SEC_ALLOC) == 0) |
2229 | { | |
347a8774 L |
2230 | /* If this is a SHT_NOTE section without SHF_ALLOC, treat |
2231 | STT_GNU_IFUNC symbol as STT_FUNC. */ | |
2232 | if (elf_section_type (input_section) == SHT_NOTE) | |
2233 | goto skip_ifunc; | |
97dc35c8 L |
2234 | /* Dynamic relocs are not propagated for SEC_DEBUGGING |
2235 | sections because such sections are not SEC_ALLOC and | |
2236 | thus ld.so will not process them. */ | |
2237 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2238 | continue; |
97dc35c8 L |
2239 | abort (); |
2240 | } | |
cbe950e9 L |
2241 | |
2242 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2243 | if (htab->elf.splt != NULL) |
cbe950e9 | 2244 | { |
ee2fdd6f L |
2245 | if (htab->plt_second != NULL) |
2246 | { | |
2247 | resolved_plt = htab->plt_second; | |
2248 | plt_offset = eh->plt_second.offset; | |
2249 | } | |
2250 | else | |
2251 | { | |
2252 | resolved_plt = htab->elf.splt; | |
2253 | plt_offset = h->plt.offset; | |
2254 | } | |
6de2ae4a | 2255 | gotplt = htab->elf.sgotplt; |
cbe950e9 L |
2256 | } |
2257 | else | |
2258 | { | |
ee2fdd6f L |
2259 | resolved_plt = htab->elf.iplt; |
2260 | plt_offset = h->plt.offset; | |
6de2ae4a | 2261 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2262 | } |
2263 | ||
cbe950e9 L |
2264 | switch (r_type) |
2265 | { | |
2266 | default: | |
233cc9c1 | 2267 | break; |
cbe950e9 L |
2268 | |
2269 | case R_386_GOT32: | |
02a86693 | 2270 | case R_386_GOT32X: |
6de2ae4a | 2271 | base_got = htab->elf.sgot; |
cbe950e9 L |
2272 | off = h->got.offset; |
2273 | ||
7afd84dc | 2274 | if (base_got == NULL) |
cbe950e9 L |
2275 | abort (); |
2276 | ||
7afd84dc | 2277 | if (off == (bfd_vma) -1) |
cbe950e9 | 2278 | { |
7afd84dc L |
2279 | /* We can't use h->got.offset here to save state, or |
2280 | even just remember the offset, as finish_dynamic_symbol | |
2281 | would use that as offset into .got. */ | |
6bbec505 | 2282 | |
233cc9c1 L |
2283 | if (h->plt.offset == (bfd_vma) -1) |
2284 | abort (); | |
2285 | ||
6de2ae4a | 2286 | if (htab->elf.splt != NULL) |
7afd84dc | 2287 | { |
f604c2a2 | 2288 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2289 | - htab->plt.has_plt0); |
7afd84dc | 2290 | off = (plt_index + 3) * 4; |
6de2ae4a | 2291 | base_got = htab->elf.sgotplt; |
7afd84dc | 2292 | } |
cbe950e9 L |
2293 | else |
2294 | { | |
25e762b9 | 2295 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 2296 | off = plt_index * 4; |
6de2ae4a | 2297 | base_got = htab->elf.igotplt; |
7afd84dc L |
2298 | } |
2299 | ||
2300 | if (h->dynindx == -1 | |
2301 | || h->forced_local | |
2302 | || info->symbolic) | |
2303 | { | |
2304 | /* This references the local defitionion. We must | |
2305 | initialize this entry in the global offset table. | |
2306 | Since the offset must always be a multiple of 8, | |
2307 | we use the least significant bit to record | |
2308 | whether we have initialized it already. | |
2309 | ||
2310 | When doing a dynamic link, we create a .rela.got | |
2311 | relocation entry to initialize the value. This | |
2312 | is done in the finish_dynamic_symbol routine. */ | |
2313 | if ((off & 1) != 0) | |
2314 | off &= ~1; | |
2315 | else | |
2316 | { | |
2317 | bfd_put_32 (output_bfd, relocation, | |
2318 | base_got->contents + off); | |
2319 | h->got.offset |= 1; | |
2320 | } | |
cbe950e9 | 2321 | } |
cbe950e9 | 2322 | |
7afd84dc | 2323 | relocation = off; |
7afd84dc L |
2324 | } |
2325 | else | |
ca8c86ef L |
2326 | relocation = (base_got->output_section->vma |
2327 | + base_got->output_offset + off | |
2328 | - gotplt->output_section->vma | |
2329 | - gotplt->output_offset); | |
2330 | ||
2a568401 L |
2331 | if (rel->r_offset > 1 |
2332 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2333 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
2334 | { |
2335 | if (bfd_link_pic (info)) | |
2336 | goto disallow_got32; | |
2337 | ||
2338 | /* Add the GOT base if there is no base register. */ | |
2339 | relocation += (gotplt->output_section->vma | |
2340 | + gotplt->output_offset); | |
2341 | } | |
2342 | else if (htab->elf.splt == NULL) | |
2343 | { | |
2344 | /* Adjust for static executables. */ | |
2345 | relocation += gotplt->output_offset; | |
2346 | } | |
0018b0a3 | 2347 | |
cbe950e9 | 2348 | goto do_relocation; |
233cc9c1 L |
2349 | } |
2350 | ||
2351 | if (h->plt.offset == (bfd_vma) -1) | |
2352 | { | |
2353 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2354 | if (r_type == R_386_32 | |
2355 | && (input_section->flags & SEC_CODE) == 0) | |
2356 | goto do_ifunc_pointer; | |
2357 | goto bad_ifunc_reloc; | |
2358 | } | |
2359 | ||
ee2fdd6f L |
2360 | relocation = (resolved_plt->output_section->vma |
2361 | + resolved_plt->output_offset + plt_offset); | |
233cc9c1 L |
2362 | |
2363 | switch (r_type) | |
2364 | { | |
2365 | default: | |
dc1e8a47 | 2366 | bad_ifunc_reloc: |
233cc9c1 L |
2367 | if (h->root.root.string) |
2368 | name = h->root.root.string; | |
2369 | else | |
2370 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2371 | NULL); | |
4eca0228 | 2372 | _bfd_error_handler |
695344c0 | 2373 | /* xgettext:c-format */ |
871b3ab2 | 2374 | (_("%pB: relocation %s against STT_GNU_IFUNC " |
233cc9c1 L |
2375 | "symbol `%s' isn't supported"), input_bfd, |
2376 | howto->name, name); | |
2377 | bfd_set_error (bfd_error_bad_value); | |
2378 | return FALSE; | |
2379 | ||
2380 | case R_386_32: | |
2381 | /* Generate dynamic relcoation only when there is a | |
2382 | non-GOT reference in a shared object. */ | |
2383 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2384 | || h->plt.offset == (bfd_vma) -1) | |
2385 | { | |
2386 | Elf_Internal_Rela outrel; | |
2387 | asection *sreloc; | |
2388 | bfd_vma offset; | |
2389 | ||
dc1e8a47 | 2390 | do_ifunc_pointer: |
233cc9c1 L |
2391 | /* Need a dynamic relocation to get the real function |
2392 | adddress. */ | |
2393 | offset = _bfd_elf_section_offset (output_bfd, | |
2394 | info, | |
2395 | input_section, | |
2396 | rel->r_offset); | |
2397 | if (offset == (bfd_vma) -1 | |
2398 | || offset == (bfd_vma) -2) | |
2399 | abort (); | |
2400 | ||
2401 | outrel.r_offset = (input_section->output_section->vma | |
2402 | + input_section->output_offset | |
2403 | + offset); | |
2404 | ||
cf1070f1 | 2405 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
233cc9c1 | 2406 | { |
871b3ab2 | 2407 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
2408 | h->root.root.string, |
2409 | h->root.u.def.section->owner); | |
2410 | ||
233cc9c1 L |
2411 | /* This symbol is resolved locally. */ |
2412 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
2413 | bfd_put_32 (output_bfd, | |
2414 | (h->root.u.def.value | |
2415 | + h->root.u.def.section->output_section->vma | |
2416 | + h->root.u.def.section->output_offset), | |
2417 | contents + offset); | |
2418 | } | |
2419 | else | |
2420 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
2421 | ||
2422 | /* Dynamic relocations are stored in | |
2423 | 1. .rel.ifunc section in PIC object. | |
2424 | 2. .rel.got section in dynamic executable. | |
2425 | 3. .rel.iplt section in static executable. */ | |
2426 | if (bfd_link_pic (info)) | |
2427 | sreloc = htab->elf.irelifunc; | |
2428 | else if (htab->elf.splt != NULL) | |
2429 | sreloc = htab->elf.srelgot; | |
2430 | else | |
2431 | sreloc = htab->elf.irelplt; | |
2432 | elf_append_rel (output_bfd, sreloc, &outrel); | |
2433 | ||
2434 | /* If this reloc is against an external symbol, we | |
2435 | do not want to fiddle with the addend. Otherwise, | |
2436 | we need to include the symbol value so that it | |
2437 | becomes an addend for the dynamic reloc. For an | |
2438 | internal symbol, we have updated addend. */ | |
2439 | continue; | |
2440 | } | |
2441 | /* FALLTHROUGH */ | |
2442 | case R_386_PC32: | |
2443 | case R_386_PLT32: | |
2444 | goto do_relocation; | |
cbe950e9 L |
2445 | |
2446 | case R_386_GOTOFF: | |
2447 | relocation -= (gotplt->output_section->vma | |
2448 | + gotplt->output_offset); | |
2449 | goto do_relocation; | |
2450 | } | |
2451 | } | |
2452 | ||
dc1e8a47 | 2453 | skip_ifunc: |
aec6b87e | 2454 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2455 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2456 | |
252b5132 RH |
2457 | switch (r_type) |
2458 | { | |
02a86693 | 2459 | case R_386_GOT32X: |
252b5132 RH |
2460 | case R_386_GOT32: |
2461 | /* Relocation is to the entry for this symbol in the global | |
2462 | offset table. */ | |
6de2ae4a | 2463 | if (htab->elf.sgot == NULL) |
ffb2e45b | 2464 | abort (); |
252b5132 | 2465 | |
e133d005 | 2466 | relative_reloc = FALSE; |
252b5132 RH |
2467 | if (h != NULL) |
2468 | { | |
252b5132 | 2469 | off = h->got.offset; |
2eba97c2 | 2470 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
252b5132 | 2471 | { |
2eba97c2 L |
2472 | /* We must initialize this entry in the global offset |
2473 | table. Since the offset must always be a multiple | |
2474 | of 4, we use the least significant bit to record | |
2475 | whether we have initialized it already. | |
252b5132 RH |
2476 | |
2477 | When doing a dynamic link, we create a .rel.got | |
2478 | relocation entry to initialize the value. This | |
2479 | is done in the finish_dynamic_symbol routine. */ | |
2480 | if ((off & 1) != 0) | |
2481 | off &= ~1; | |
2482 | else | |
2483 | { | |
2484 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 2485 | htab->elf.sgot->contents + off); |
252b5132 | 2486 | h->got.offset |= 1; |
e133d005 | 2487 | |
f70656b2 | 2488 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
e133d005 L |
2489 | { |
2490 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 2491 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 L |
2492 | eh->no_finish_dynamic_symbol = 1; |
2493 | relative_reloc = TRUE; | |
2494 | } | |
252b5132 RH |
2495 | } |
2496 | } | |
8c694914 | 2497 | else |
b34976b6 | 2498 | unresolved_reloc = FALSE; |
252b5132 RH |
2499 | } |
2500 | else | |
2501 | { | |
ffb2e45b AM |
2502 | if (local_got_offsets == NULL) |
2503 | abort (); | |
252b5132 RH |
2504 | |
2505 | off = local_got_offsets[r_symndx]; | |
2506 | ||
2507 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2508 | the least significant bit to record whether we have |
2509 | already generated the necessary reloc. */ | |
252b5132 RH |
2510 | if ((off & 1) != 0) |
2511 | off &= ~1; | |
2512 | else | |
2513 | { | |
6725bdbf | 2514 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 2515 | htab->elf.sgot->contents + off); |
e133d005 | 2516 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 2517 | |
0e1862bb | 2518 | if (bfd_link_pic (info)) |
e133d005 | 2519 | relative_reloc = TRUE; |
252b5132 | 2520 | } |
252b5132 RH |
2521 | } |
2522 | ||
e133d005 L |
2523 | if (relative_reloc) |
2524 | { | |
2525 | asection *s; | |
2526 | Elf_Internal_Rela outrel; | |
2527 | ||
2528 | s = htab->elf.srelgot; | |
2529 | if (s == NULL) | |
2530 | abort (); | |
2531 | ||
2532 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
2533 | + htab->elf.sgot->output_offset | |
2534 | + off); | |
2535 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2536 | elf_append_rel (output_bfd, s, &outrel); | |
2537 | } | |
2538 | ||
ffb2e45b AM |
2539 | if (off >= (bfd_vma) -2) |
2540 | abort (); | |
2541 | ||
74d7f0aa L |
2542 | relocation = (htab->elf.sgot->output_section->vma |
2543 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
2544 | if (rel->r_offset > 1 |
2545 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2546 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
2547 | { |
2548 | if (bfd_link_pic (info)) | |
2549 | { | |
2550 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
2551 | register, except for "lea foo@GOT, %reg", since |
2552 | we don't know what the GOT base is. */ | |
74d7f0aa L |
2553 | const char *name; |
2554 | ||
dc1e8a47 | 2555 | disallow_got32: |
a5def14f | 2556 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
2557 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
2558 | NULL); | |
2559 | else | |
2560 | name = h->root.root.string; | |
2561 | ||
4eca0228 | 2562 | _bfd_error_handler |
695344c0 | 2563 | /* xgettext:c-format */ |
871b3ab2 | 2564 | (_("%pB: direct GOT relocation %s against `%s'" |
63a5468a AM |
2565 | " without base register can not be used" |
2566 | " when making a shared object"), | |
712ec279 | 2567 | input_bfd, howto->name, name); |
74d7f0aa L |
2568 | bfd_set_error (bfd_error_bad_value); |
2569 | return FALSE; | |
2570 | } | |
2571 | } | |
2572 | else | |
2573 | { | |
2574 | /* Subtract the .got.plt section address only with a base | |
2575 | register. */ | |
2576 | relocation -= (htab->elf.sgotplt->output_section->vma | |
2577 | + htab->elf.sgotplt->output_offset); | |
2578 | } | |
2579 | ||
252b5132 RH |
2580 | break; |
2581 | ||
2582 | case R_386_GOTOFF: | |
2583 | /* Relocation is relative to the start of the global offset | |
2584 | table. */ | |
2585 | ||
3d949995 L |
2586 | /* Check to make sure it isn't a protected function or data |
2587 | symbol for shared library since it may not be local when | |
2588 | used as function address or with copy relocation. We also | |
e3c0e327 | 2589 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 2590 | if (!bfd_link_executable (info) && h) |
90f487df | 2591 | { |
41bed6dd L |
2592 | if (!h->def_regular) |
2593 | { | |
2594 | const char *v; | |
2595 | ||
2596 | switch (ELF_ST_VISIBILITY (h->other)) | |
2597 | { | |
2598 | case STV_HIDDEN: | |
2599 | v = _("hidden symbol"); | |
2600 | break; | |
2601 | case STV_INTERNAL: | |
2602 | v = _("internal symbol"); | |
2603 | break; | |
2604 | case STV_PROTECTED: | |
2605 | v = _("protected symbol"); | |
2606 | break; | |
2607 | default: | |
2608 | v = _("symbol"); | |
2609 | break; | |
2610 | } | |
2611 | ||
4eca0228 | 2612 | _bfd_error_handler |
695344c0 | 2613 | /* xgettext:c-format */ |
871b3ab2 | 2614 | (_("%pB: relocation R_386_GOTOFF against undefined %s" |
63a5468a | 2615 | " `%s' can not be used when making a shared object"), |
41bed6dd L |
2616 | input_bfd, v, h->root.root.string); |
2617 | bfd_set_error (bfd_error_bad_value); | |
2618 | return FALSE; | |
2619 | } | |
6999821f | 2620 | else if (!SYMBOL_REFERENCES_LOCAL_P (info, h) |
3d949995 L |
2621 | && (h->type == STT_FUNC |
2622 | || h->type == STT_OBJECT) | |
41bed6dd L |
2623 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
2624 | { | |
4eca0228 | 2625 | _bfd_error_handler |
695344c0 | 2626 | /* xgettext:c-format */ |
871b3ab2 | 2627 | (_("%pB: relocation R_386_GOTOFF against protected %s" |
63a5468a | 2628 | " `%s' can not be used when making a shared object"), |
3d949995 L |
2629 | input_bfd, |
2630 | h->type == STT_FUNC ? "function" : "data", | |
2631 | h->root.root.string); | |
41bed6dd L |
2632 | bfd_set_error (bfd_error_bad_value); |
2633 | return FALSE; | |
2634 | } | |
90f487df L |
2635 | } |
2636 | ||
8c37241b JJ |
2637 | /* Note that sgot is not involved in this |
2638 | calculation. We always want the start of .got.plt. If we | |
2639 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
2640 | permitted by the ABI, we might have to change this |
2641 | calculation. */ | |
6de2ae4a L |
2642 | relocation -= htab->elf.sgotplt->output_section->vma |
2643 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
2644 | break; |
2645 | ||
2646 | case R_386_GOTPC: | |
2647 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
2648 | relocation = htab->elf.sgotplt->output_section->vma |
2649 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 2650 | unresolved_reloc = FALSE; |
252b5132 RH |
2651 | break; |
2652 | ||
2653 | case R_386_PLT32: | |
2654 | /* Relocation is to the entry for this symbol in the | |
2655 | procedure linkage table. */ | |
2656 | ||
dd5724d5 | 2657 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2658 | without using the procedure linkage table. */ |
252b5132 RH |
2659 | if (h == NULL) |
2660 | break; | |
2661 | ||
dd7e64d4 L |
2662 | if ((h->plt.offset == (bfd_vma) -1 |
2663 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2664 | || htab->elf.splt == NULL) |
252b5132 RH |
2665 | { |
2666 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2667 | happens when statically linking PIC code, or when |
2668 | using -Bsymbolic. */ | |
252b5132 RH |
2669 | break; |
2670 | } | |
2671 | ||
dd7e64d4 L |
2672 | if (h->plt.offset != (bfd_vma) -1) |
2673 | { | |
ee2fdd6f L |
2674 | if (htab->plt_second != NULL) |
2675 | { | |
2676 | resolved_plt = htab->plt_second; | |
2677 | plt_offset = eh->plt_second.offset; | |
2678 | } | |
2679 | else | |
2680 | { | |
2681 | resolved_plt = htab->elf.splt; | |
2682 | plt_offset = h->plt.offset; | |
2683 | } | |
dd7e64d4 L |
2684 | } |
2685 | else | |
2686 | { | |
2687 | resolved_plt = htab->plt_got; | |
2688 | plt_offset = eh->plt_got.offset; | |
2689 | } | |
2690 | ||
2691 | relocation = (resolved_plt->output_section->vma | |
2692 | + resolved_plt->output_offset | |
2693 | + plt_offset); | |
b34976b6 | 2694 | unresolved_reloc = FALSE; |
252b5132 RH |
2695 | break; |
2696 | ||
1788fc08 | 2697 | case R_386_SIZE32: |
1788fc08 L |
2698 | /* Set to symbol size. */ |
2699 | relocation = st_size; | |
2700 | /* Fall through. */ | |
2701 | ||
252b5132 RH |
2702 | case R_386_32: |
2703 | case R_386_PC32: | |
3348747a NS |
2704 | if ((input_section->flags & SEC_ALLOC) == 0 |
2705 | || is_vxworks_tls) | |
ec338859 AM |
2706 | break; |
2707 | ||
382aae06 | 2708 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, sec, |
aebcc8ff L |
2709 | FALSE, resolved_to_zero, |
2710 | (r_type == R_386_PC32))) | |
252b5132 | 2711 | { |
947216bf | 2712 | Elf_Internal_Rela outrel; |
b34976b6 | 2713 | bfd_boolean skip, relocate; |
0c715baa | 2714 | asection *sreloc; |
252b5132 RH |
2715 | |
2716 | /* When generating a shared object, these relocations | |
2717 | are copied into the output file to be resolved at run | |
2718 | time. */ | |
2719 | ||
b34976b6 AM |
2720 | skip = FALSE; |
2721 | relocate = FALSE; | |
252b5132 | 2722 | |
c629eae0 JJ |
2723 | outrel.r_offset = |
2724 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2725 | rel->r_offset); | |
2726 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2727 | skip = TRUE; |
0bb2d96a | 2728 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2729 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
2730 | outrel.r_offset += (input_section->output_section->vma |
2731 | + input_section->output_offset); | |
2732 | ||
2733 | if (skip) | |
0bb2d96a | 2734 | memset (&outrel, 0, sizeof outrel); |
e74399c4 | 2735 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
0bb2d96a | 2736 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2737 | else |
2738 | { | |
5a15f56f | 2739 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2740 | relocate = TRUE; |
5a15f56f | 2741 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
2742 | } |
2743 | ||
cbe950e9 | 2744 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 2745 | |
62d78908 L |
2746 | if (sreloc == NULL || sreloc->contents == NULL) |
2747 | { | |
2748 | r = bfd_reloc_notsupported; | |
2749 | goto check_relocation_error; | |
2750 | } | |
0c715baa | 2751 | |
59d6ffb2 | 2752 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
2753 | |
2754 | /* If this reloc is against an external symbol, we do | |
2755 | not want to fiddle with the addend. Otherwise, we | |
2756 | need to include the symbol value so that it becomes | |
2757 | an addend for the dynamic reloc. */ | |
0f88be7a | 2758 | if (! relocate) |
252b5132 RH |
2759 | continue; |
2760 | } | |
252b5132 RH |
2761 | break; |
2762 | ||
37e55690 | 2763 | case R_386_TLS_IE: |
0e1862bb | 2764 | if (!bfd_link_executable (info)) |
37e55690 | 2765 | { |
947216bf | 2766 | Elf_Internal_Rela outrel; |
37e55690 | 2767 | asection *sreloc; |
37e55690 JJ |
2768 | |
2769 | outrel.r_offset = rel->r_offset | |
2770 | + input_section->output_section->vma | |
2771 | + input_section->output_offset; | |
2772 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2773 | sreloc = elf_section_data (input_section)->sreloc; | |
2774 | if (sreloc == NULL) | |
2775 | abort (); | |
59d6ffb2 | 2776 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
2777 | } |
2778 | /* Fall through */ | |
2779 | ||
13ae64f3 | 2780 | case R_386_TLS_GD: |
67a4f2b7 AO |
2781 | case R_386_TLS_GOTDESC: |
2782 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 2783 | case R_386_TLS_IE_32: |
37e55690 | 2784 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
2785 | tls_type = GOT_UNKNOWN; |
2786 | if (h == NULL && local_got_offsets) | |
0afcef53 | 2787 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
13ae64f3 | 2788 | else if (h != NULL) |
0afcef53 | 2789 | tls_type = elf_x86_hash_entry(h)->tls_type; |
37e55690 JJ |
2790 | if (tls_type == GOT_TLS_IE) |
2791 | tls_type = GOT_TLS_IE_NEG; | |
142411ca | 2792 | |
419414ea | 2793 | r_type_tls = r_type; |
142411ca L |
2794 | if (! elf_i386_tls_transition (info, input_bfd, |
2795 | input_section, contents, | |
2796 | symtab_hdr, sym_hashes, | |
419414ea | 2797 | &r_type_tls, tls_type, rel, |
bedfd056 | 2798 | relend, h, r_symndx, TRUE)) |
142411ca | 2799 | return FALSE; |
13ae64f3 | 2800 | |
419414ea | 2801 | if (r_type_tls == R_386_TLS_LE_32) |
13ae64f3 | 2802 | { |
82e51918 | 2803 | BFD_ASSERT (! unresolved_reloc); |
419414ea | 2804 | if (r_type == R_386_TLS_GD) |
13ae64f3 | 2805 | { |
142411ca | 2806 | unsigned int type; |
13ae64f3 JJ |
2807 | bfd_vma roff; |
2808 | ||
2809 | /* GD->LE transition. */ | |
6eaa7fb5 | 2810 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
2811 | if (type == 0x04) |
2812 | { | |
6eaa7fb5 L |
2813 | /* Change |
2814 | leal foo@tlsgd(,%ebx,1), %eax | |
2815 | call ___tls_get_addr@PLT | |
2816 | into: | |
2817 | movl %gs:0, %eax | |
2818 | subl $foo@tpoff, %eax | |
13ae64f3 | 2819 | (6 byte form of subl). */ |
142411ca | 2820 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
2821 | } |
2822 | else | |
2823 | { | |
6eaa7fb5 L |
2824 | /* Change |
2825 | leal foo@tlsgd(%ebx), %eax | |
2826 | call ___tls_get_addr@PLT | |
2827 | nop | |
2828 | or | |
2829 | leal foo@tlsgd(%reg), %eax | |
2830 | call *___tls_get_addr@GOT(%reg) | |
2831 | which may be converted to | |
2832 | addr32 call ___tls_get_addr | |
2833 | into: | |
2834 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 2835 | (6 byte form of subl). */ |
142411ca | 2836 | roff = rel->r_offset + 6; |
13ae64f3 | 2837 | } |
6eaa7fb5 L |
2838 | memcpy (contents + roff - 8, |
2839 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 2840 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 2841 | contents + roff); |
6eaa7fb5 | 2842 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 2843 | rel++; |
60f2e42e | 2844 | wrel++; |
13ae64f3 JJ |
2845 | continue; |
2846 | } | |
419414ea | 2847 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
2848 | { |
2849 | /* GDesc -> LE transition. | |
2850 | It's originally something like: | |
2851 | leal x@tlsdesc(%ebx), %eax | |
2852 | ||
2853 | leal x@ntpoff, %eax | |
2854 | ||
2855 | Registers other than %eax may be set up here. */ | |
2856 | ||
142411ca | 2857 | unsigned int val; |
67a4f2b7 AO |
2858 | bfd_vma roff; |
2859 | ||
67a4f2b7 | 2860 | roff = rel->r_offset; |
67a4f2b7 | 2861 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
2862 | |
2863 | /* Now modify the instruction as appropriate. */ | |
2864 | /* aoliva FIXME: remove the above and xor the byte | |
2865 | below with 0x86. */ | |
2866 | bfd_put_8 (output_bfd, val ^ 0x86, | |
2867 | contents + roff - 1); | |
eb4ff4d6 | 2868 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
2869 | contents + roff); |
2870 | continue; | |
2871 | } | |
419414ea | 2872 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
2873 | { |
2874 | /* GDesc -> LE transition. | |
2875 | It's originally: | |
2876 | call *(%eax) | |
2877 | Turn it into: | |
142411ca | 2878 | xchg %ax,%ax */ |
67a4f2b7 | 2879 | |
67a4f2b7 | 2880 | bfd_vma roff; |
6bbec505 | 2881 | |
67a4f2b7 | 2882 | roff = rel->r_offset; |
10efb593 | 2883 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
2884 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2885 | continue; | |
2886 | } | |
419414ea | 2887 | else if (r_type == R_386_TLS_IE) |
13ae64f3 | 2888 | { |
142411ca | 2889 | unsigned int val; |
13ae64f3 JJ |
2890 | |
2891 | /* IE->LE transition: | |
37e55690 JJ |
2892 | Originally it can be one of: |
2893 | movl foo, %eax | |
2894 | movl foo, %reg | |
2895 | addl foo, %reg | |
2896 | We change it into: | |
2897 | movl $foo, %eax | |
2898 | movl $foo, %reg | |
2899 | addl $foo, %reg. */ | |
37e55690 | 2900 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
2901 | if (val == 0xa1) |
2902 | { | |
2903 | /* movl foo, %eax. */ | |
55fd94b0 AM |
2904 | bfd_put_8 (output_bfd, 0xb8, |
2905 | contents + rel->r_offset - 1); | |
37e55690 | 2906 | } |
299bf759 | 2907 | else |
37e55690 | 2908 | { |
142411ca L |
2909 | unsigned int type; |
2910 | ||
55fd94b0 AM |
2911 | type = bfd_get_8 (input_bfd, |
2912 | contents + rel->r_offset - 2); | |
299bf759 | 2913 | switch (type) |
26e41594 | 2914 | { |
299bf759 L |
2915 | case 0x8b: |
2916 | /* movl */ | |
299bf759 L |
2917 | bfd_put_8 (output_bfd, 0xc7, |
2918 | contents + rel->r_offset - 2); | |
2919 | bfd_put_8 (output_bfd, | |
2920 | 0xc0 | ((val >> 3) & 7), | |
2921 | contents + rel->r_offset - 1); | |
2922 | break; | |
2923 | case 0x03: | |
2924 | /* addl */ | |
299bf759 L |
2925 | bfd_put_8 (output_bfd, 0x81, |
2926 | contents + rel->r_offset - 2); | |
2927 | bfd_put_8 (output_bfd, | |
2928 | 0xc0 | ((val >> 3) & 7), | |
2929 | contents + rel->r_offset - 1); | |
2930 | break; | |
2931 | default: | |
2932 | BFD_FAIL (); | |
2933 | break; | |
26e41594 | 2934 | } |
37e55690 | 2935 | } |
eb4ff4d6 | 2936 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
2937 | contents + rel->r_offset); |
2938 | continue; | |
2939 | } | |
2940 | else | |
2941 | { | |
2942 | unsigned int val, type; | |
2943 | ||
2944 | /* {IE_32,GOTIE}->LE transition: | |
2945 | Originally it can be one of: | |
13ae64f3 | 2946 | subl foo(%reg1), %reg2 |
13ae64f3 | 2947 | movl foo(%reg1), %reg2 |
37e55690 | 2948 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
2949 | We change it into: |
2950 | subl $foo, %reg2 | |
37e55690 JJ |
2951 | movl $foo, %reg2 (6 byte form) |
2952 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
2953 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
2954 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
2955 | if (type == 0x8b) |
2956 | { | |
2957 | /* movl */ | |
13ae64f3 JJ |
2958 | bfd_put_8 (output_bfd, 0xc7, |
2959 | contents + rel->r_offset - 2); | |
2960 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2961 | contents + rel->r_offset - 1); | |
2962 | } | |
2963 | else if (type == 0x2b) | |
2964 | { | |
2965 | /* subl */ | |
13ae64f3 JJ |
2966 | bfd_put_8 (output_bfd, 0x81, |
2967 | contents + rel->r_offset - 2); | |
2968 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
2969 | contents + rel->r_offset - 1); | |
2970 | } | |
37e55690 JJ |
2971 | else if (type == 0x03) |
2972 | { | |
2973 | /* addl */ | |
2974 | bfd_put_8 (output_bfd, 0x81, | |
2975 | contents + rel->r_offset - 2); | |
2976 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2977 | contents + rel->r_offset - 1); | |
2978 | } | |
13ae64f3 JJ |
2979 | else |
2980 | BFD_FAIL (); | |
419414ea | 2981 | if (r_type == R_386_TLS_GOTIE) |
eb4ff4d6 | 2982 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
2983 | contents + rel->r_offset); |
2984 | else | |
eb4ff4d6 | 2985 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 2986 | contents + rel->r_offset); |
13ae64f3 JJ |
2987 | continue; |
2988 | } | |
2989 | } | |
2990 | ||
6de2ae4a | 2991 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
2992 | abort (); |
2993 | ||
2994 | if (h != NULL) | |
67a4f2b7 AO |
2995 | { |
2996 | off = h->got.offset; | |
0afcef53 | 2997 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 2998 | } |
13ae64f3 JJ |
2999 | else |
3000 | { | |
3001 | if (local_got_offsets == NULL) | |
3002 | abort (); | |
3003 | ||
3004 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3005 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3006 | } |
3007 | ||
3008 | if ((off & 1) != 0) | |
3009 | off &= ~1; | |
26e41594 | 3010 | else |
13ae64f3 | 3011 | { |
947216bf | 3012 | Elf_Internal_Rela outrel; |
91d6fa6a | 3013 | int dr_type; |
67a4f2b7 | 3014 | asection *sreloc; |
13ae64f3 | 3015 | |
6de2ae4a | 3016 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3017 | abort (); |
3018 | ||
67a4f2b7 AO |
3019 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3020 | ||
3021 | if (GOT_TLS_GDESC_P (tls_type)) | |
3022 | { | |
59d6ffb2 | 3023 | bfd_byte *loc; |
67a4f2b7 AO |
3024 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
3025 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
3026 | <= htab->elf.sgotplt->size); |
3027 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3028 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3029 | + offplt |
3030 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3031 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3032 | loc = sreloc->contents; |
765e526c | 3033 | loc += (htab->next_tls_desc_index++ |
5ae0bfb6 | 3034 | * sizeof (Elf32_External_Rel)); |
67a4f2b7 | 3035 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 3036 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
3037 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3038 | if (indx == 0) | |
3039 | { | |
3040 | BFD_ASSERT (! unresolved_reloc); | |
3041 | bfd_put_32 (output_bfd, | |
0afcef53 | 3042 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3043 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3044 | + htab->sgotplt_jump_table_size + 4); |
3045 | } | |
3046 | else | |
3047 | { | |
3048 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3049 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3050 | + htab->sgotplt_jump_table_size + 4); |
3051 | } | |
3052 | } | |
3053 | ||
6de2ae4a | 3054 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3055 | |
6de2ae4a L |
3056 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3057 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 3058 | |
67a4f2b7 | 3059 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 3060 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
3061 | else if (GOT_TLS_GDESC_P (tls_type)) |
3062 | goto dr_done; | |
37e55690 JJ |
3063 | else if (tls_type == GOT_TLS_IE_POS) |
3064 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
3065 | else |
3066 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 3067 | |
37e55690 | 3068 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 | 3069 | bfd_put_32 (output_bfd, |
0afcef53 | 3070 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3071 | htab->elf.sgot->contents + off); |
37e55690 | 3072 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 3073 | bfd_put_32 (output_bfd, |
0afcef53 | 3074 | _bfd_x86_elf_dtpoff_base (info) - relocation, |
6de2ae4a | 3075 | htab->elf.sgot->contents + off); |
67a4f2b7 | 3076 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 3077 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3078 | htab->elf.sgot->contents + off); |
13ae64f3 | 3079 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 3080 | |
59d6ffb2 | 3081 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 3082 | |
67a4f2b7 | 3083 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3084 | { |
3085 | if (indx == 0) | |
3086 | { | |
07d6d2b8 | 3087 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 3088 | bfd_put_32 (output_bfd, |
0afcef53 | 3089 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3090 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3091 | } |
3092 | else | |
3093 | { | |
3094 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3095 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3096 | outrel.r_info = ELF32_R_INFO (indx, |
3097 | R_386_TLS_DTPOFF32); | |
3098 | outrel.r_offset += 4; | |
59d6ffb2 | 3099 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
3100 | } |
3101 | } | |
37e55690 JJ |
3102 | else if (tls_type == GOT_TLS_IE_BOTH) |
3103 | { | |
3104 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 3105 | (indx == 0 |
0afcef53 | 3106 | ? relocation - _bfd_x86_elf_dtpoff_base (info) |
eb4ff4d6 | 3107 | : 0), |
6de2ae4a | 3108 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
3109 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
3110 | outrel.r_offset += 4; | |
59d6ffb2 | 3111 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 3112 | } |
13ae64f3 | 3113 | |
67a4f2b7 | 3114 | dr_done: |
13ae64f3 JJ |
3115 | if (h != NULL) |
3116 | h->got.offset |= 1; | |
3117 | else | |
3118 | local_got_offsets[r_symndx] |= 1; | |
3119 | } | |
3120 | ||
67a4f2b7 AO |
3121 | if (off >= (bfd_vma) -2 |
3122 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3123 | abort (); |
419414ea L |
3124 | if (r_type_tls == R_386_TLS_GOTDESC |
3125 | || r_type_tls == R_386_TLS_DESC_CALL) | |
67a4f2b7 AO |
3126 | { |
3127 | relocation = htab->sgotplt_jump_table_size + offplt; | |
3128 | unresolved_reloc = FALSE; | |
3129 | } | |
419414ea | 3130 | else if (r_type_tls == r_type) |
13ae64f3 | 3131 | { |
6de2ae4a L |
3132 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
3133 | + htab->elf.sgotplt->output_offset; | |
3134 | relocation = htab->elf.sgot->output_section->vma | |
3135 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
3136 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3137 | && tls_type == GOT_TLS_IE_BOTH) | |
3138 | relocation += 4; | |
3139 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3140 | relocation += g_o_t; |
b34976b6 | 3141 | unresolved_reloc = FALSE; |
13ae64f3 | 3142 | } |
419414ea | 3143 | else if (r_type == R_386_TLS_GD) |
13ae64f3 JJ |
3144 | { |
3145 | unsigned int val, type; | |
3146 | bfd_vma roff; | |
3147 | ||
3148 | /* GD->IE transition. */ | |
6eaa7fb5 L |
3149 | type = *(contents + rel->r_offset - 2); |
3150 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3151 | if (type == 0x04) |
3152 | { | |
6eaa7fb5 L |
3153 | /* Change |
3154 | leal foo@tlsgd(,%ebx,1), %eax | |
3155 | call ___tls_get_addr@PLT | |
3156 | into: | |
3157 | movl %gs:0, %eax | |
3158 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 3159 | val >>= 3; |
142411ca | 3160 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
3161 | } |
3162 | else | |
3163 | { | |
6eaa7fb5 L |
3164 | /* Change |
3165 | leal foo@tlsgd(%ebx), %eax | |
3166 | call ___tls_get_addr@PLT | |
3167 | nop | |
3168 | or | |
3169 | leal foo@tlsgd(%reg), %eax | |
3170 | call *___tls_get_addr@GOT(%reg) | |
3171 | which may be converted to | |
3172 | addr32 call ___tls_get_addr | |
3173 | into: | |
3174 | movl %gs:0, %eax; | |
3175 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
3176 | roff = rel->r_offset - 2; |
3177 | } | |
3178 | memcpy (contents + roff, | |
3179 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3180 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3181 | /* If foo is used only with foo@gotntpoff(%reg) and |
3182 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3183 | subl $foo@gottpoff(%reg), %eax | |
3184 | into: | |
3185 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3186 | if (tls_type == GOT_TLS_IE_POS) |
3187 | contents[roff + 6] = 0x03; | |
8c37241b | 3188 | bfd_put_32 (output_bfd, |
6de2ae4a L |
3189 | htab->elf.sgot->output_section->vma |
3190 | + htab->elf.sgot->output_offset + off | |
3191 | - htab->elf.sgotplt->output_section->vma | |
3192 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 3193 | contents + roff + 8); |
6eaa7fb5 | 3194 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 3195 | rel++; |
60f2e42e | 3196 | wrel++; |
13ae64f3 JJ |
3197 | continue; |
3198 | } | |
419414ea | 3199 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
3200 | { |
3201 | /* GDesc -> IE transition. | |
3202 | It's originally something like: | |
3203 | leal x@tlsdesc(%ebx), %eax | |
3204 | ||
3205 | Change it to: | |
142411ca | 3206 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
3207 | or: |
3208 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3209 | ||
3210 | Registers other than %eax may be set up here. */ | |
3211 | ||
67a4f2b7 AO |
3212 | bfd_vma roff; |
3213 | ||
3214 | /* First, make sure it's a leal adding ebx to a 32-bit | |
3215 | offset into any register, although it's probably | |
3216 | almost always going to be eax. */ | |
3217 | roff = rel->r_offset; | |
67a4f2b7 AO |
3218 | |
3219 | /* Now modify the instruction as appropriate. */ | |
3220 | /* To turn a leal into a movl in the form we use it, it | |
3221 | suffices to change the first byte from 0x8d to 0x8b. | |
3222 | aoliva FIXME: should we decide to keep the leal, all | |
3223 | we have to do is remove the statement below, and | |
3224 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
3225 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3226 | ||
3227 | if (tls_type == GOT_TLS_IE_BOTH) | |
3228 | off += 4; | |
3229 | ||
3230 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3231 | htab->elf.sgot->output_section->vma |
3232 | + htab->elf.sgot->output_offset + off | |
3233 | - htab->elf.sgotplt->output_section->vma | |
3234 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
3235 | contents + roff); |
3236 | continue; | |
3237 | } | |
419414ea | 3238 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
3239 | { |
3240 | /* GDesc -> IE transition. | |
3241 | It's originally: | |
3242 | call *(%eax) | |
3243 | ||
3244 | Change it to: | |
142411ca | 3245 | xchg %ax,%ax |
67a4f2b7 AO |
3246 | or |
3247 | negl %eax | |
3248 | depending on how we transformed the TLS_GOTDESC above. | |
3249 | */ | |
3250 | ||
67a4f2b7 AO |
3251 | bfd_vma roff; |
3252 | ||
67a4f2b7 | 3253 | roff = rel->r_offset; |
67a4f2b7 AO |
3254 | |
3255 | /* Now modify the instruction as appropriate. */ | |
3256 | if (tls_type != GOT_TLS_IE_NEG) | |
3257 | { | |
10efb593 L |
3258 | /* xchg %ax,%ax */ |
3259 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
3260 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3261 | } | |
3262 | else | |
3263 | { | |
3264 | /* negl %eax */ | |
3265 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
3266 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
3267 | } | |
3268 | ||
3269 | continue; | |
3270 | } | |
3271 | else | |
3272 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
3273 | break; |
3274 | ||
3275 | case R_386_TLS_LDM: | |
142411ca L |
3276 | if (! elf_i386_tls_transition (info, input_bfd, |
3277 | input_section, contents, | |
3278 | symtab_hdr, sym_hashes, | |
3279 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 3280 | relend, h, r_symndx, TRUE)) |
142411ca | 3281 | return FALSE; |
13ae64f3 | 3282 | |
142411ca L |
3283 | if (r_type != R_386_TLS_LDM) |
3284 | { | |
6eaa7fb5 L |
3285 | /* LD->LE transition. Change |
3286 | leal foo@tlsldm(%ebx) %eax | |
3287 | call ___tls_get_addr@PLT | |
3288 | into: | |
3289 | movl %gs:0, %eax | |
3290 | nop | |
3291 | leal 0(%esi,1), %esi | |
3292 | or change | |
3293 | leal foo@tlsldm(%reg) %eax | |
3294 | call *___tls_get_addr@GOT(%reg) | |
3295 | which may be converted to | |
3296 | addr32 call ___tls_get_addr | |
3297 | into: | |
3298 | movl %gs:0, %eax | |
3299 | leal 0(%esi), %esi */ | |
142411ca | 3300 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
3301 | if (*(contents + rel->r_offset + 4) == 0xff |
3302 | || *(contents + rel->r_offset + 4) == 0x67) | |
3303 | memcpy (contents + rel->r_offset - 2, | |
3304 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
3305 | else | |
3306 | memcpy (contents + rel->r_offset - 2, | |
3307 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 3308 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 3309 | rel++; |
60f2e42e | 3310 | wrel++; |
13ae64f3 JJ |
3311 | continue; |
3312 | } | |
3313 | ||
6de2ae4a | 3314 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3315 | abort (); |
3316 | ||
0afcef53 | 3317 | off = htab->tls_ld_or_ldm_got.offset; |
13ae64f3 JJ |
3318 | if (off & 1) |
3319 | off &= ~1; | |
3320 | else | |
3321 | { | |
947216bf | 3322 | Elf_Internal_Rela outrel; |
13ae64f3 | 3323 | |
6de2ae4a | 3324 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3325 | abort (); |
3326 | ||
6de2ae4a L |
3327 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3328 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
3329 | |
3330 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3331 | htab->elf.sgot->contents + off); |
13ae64f3 | 3332 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3333 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 3334 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 3335 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
0afcef53 | 3336 | htab->tls_ld_or_ldm_got.offset |= 1; |
13ae64f3 | 3337 | } |
6de2ae4a L |
3338 | relocation = htab->elf.sgot->output_section->vma |
3339 | + htab->elf.sgot->output_offset + off | |
3340 | - htab->elf.sgotplt->output_section->vma | |
3341 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 3342 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
3343 | break; |
3344 | ||
3345 | case R_386_TLS_LDO_32: | |
0e1862bb L |
3346 | if (!bfd_link_executable (info) |
3347 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3348 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
13ae64f3 JJ |
3349 | else |
3350 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 3351 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3352 | break; |
3353 | ||
3354 | case R_386_TLS_LE_32: | |
13ae64f3 | 3355 | case R_386_TLS_LE: |
0e1862bb | 3356 | if (!bfd_link_executable (info)) |
37e55690 | 3357 | { |
947216bf | 3358 | Elf_Internal_Rela outrel; |
37e55690 | 3359 | asection *sreloc; |
37e55690 JJ |
3360 | |
3361 | outrel.r_offset = rel->r_offset | |
3362 | + input_section->output_section->vma | |
3363 | + input_section->output_offset; | |
3364 | if (h != NULL && h->dynindx != -1) | |
3365 | indx = h->dynindx; | |
3366 | else | |
3367 | indx = 0; | |
3368 | if (r_type == R_386_TLS_LE_32) | |
3369 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
3370 | else | |
3371 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3372 | sreloc = elf_section_data (input_section)->sreloc; | |
3373 | if (sreloc == NULL) | |
3374 | abort (); | |
59d6ffb2 | 3375 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3376 | if (indx) |
3377 | continue; | |
3378 | else if (r_type == R_386_TLS_LE_32) | |
0afcef53 | 3379 | relocation = _bfd_x86_elf_dtpoff_base (info) - relocation; |
37e55690 | 3380 | else |
0afcef53 | 3381 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
37e55690 JJ |
3382 | } |
3383 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 3384 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 3385 | else |
eb4ff4d6 | 3386 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3387 | break; |
3388 | ||
252b5132 RH |
3389 | default: |
3390 | break; | |
3391 | } | |
3392 | ||
239e1f3a AM |
3393 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3394 | because such sections are not SEC_ALLOC and thus ld.so will | |
3395 | not process them. */ | |
8c694914 | 3396 | if (unresolved_reloc |
239e1f3a | 3397 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3398 | && h->def_dynamic) |
3399 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3400 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 3401 | { |
4eca0228 | 3402 | _bfd_error_handler |
695344c0 | 3403 | /* xgettext:c-format */ |
2dcf00ce | 3404 | (_("%pB(%pA+%#" PRIx64 "): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3405 | input_bfd, |
3406 | input_section, | |
2dcf00ce | 3407 | (uint64_t) rel->r_offset, |
843fe662 | 3408 | howto->name, |
6a30718d | 3409 | h->root.root.string); |
b34976b6 | 3410 | return FALSE; |
6a30718d | 3411 | } |
83be169b | 3412 | |
dc1e8a47 | 3413 | do_relocation: |
252b5132 RH |
3414 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
3415 | contents, rel->r_offset, | |
55fd94b0 | 3416 | relocation, 0); |
252b5132 | 3417 | |
dc1e8a47 | 3418 | check_relocation_error: |
cf5c0c5b | 3419 | if (r != bfd_reloc_ok) |
252b5132 | 3420 | { |
cf5c0c5b | 3421 | const char *name; |
ffb2e45b | 3422 | |
cf5c0c5b AM |
3423 | if (h != NULL) |
3424 | name = h->root.root.string; | |
3425 | else | |
3426 | { | |
3427 | name = bfd_elf_string_from_elf_section (input_bfd, | |
3428 | symtab_hdr->sh_link, | |
3429 | sym->st_name); | |
3430 | if (name == NULL) | |
b34976b6 | 3431 | return FALSE; |
cf5c0c5b | 3432 | if (*name == '\0') |
fd361982 | 3433 | name = bfd_section_name (sec); |
cf5c0c5b | 3434 | } |
ffb2e45b | 3435 | |
cf5c0c5b | 3436 | if (r == bfd_reloc_overflow) |
1a72702b AM |
3437 | (*info->callbacks->reloc_overflow) |
3438 | (info, (h ? &h->root : NULL), name, howto->name, | |
3439 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
3440 | else |
3441 | { | |
4eca0228 | 3442 | _bfd_error_handler |
695344c0 | 3443 | /* xgettext:c-format */ |
2dcf00ce | 3444 | (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"), |
d003868e | 3445 | input_bfd, input_section, |
2dcf00ce | 3446 | (uint64_t) rel->r_offset, name, (int) r); |
b34976b6 | 3447 | return FALSE; |
cf5c0c5b | 3448 | } |
252b5132 | 3449 | } |
60f2e42e L |
3450 | |
3451 | if (wrel != rel) | |
3452 | *wrel = *rel; | |
3453 | } | |
3454 | ||
3455 | if (wrel != rel) | |
3456 | { | |
3457 | Elf_Internal_Shdr *rel_hdr; | |
3458 | size_t deleted = rel - wrel; | |
3459 | ||
3460 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3461 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3462 | if (rel_hdr->sh_size == 0) | |
3463 | { | |
3464 | /* It is too late to remove an empty reloc section. Leave | |
3465 | one NONE reloc. | |
3466 | ??? What is wrong with an empty section??? */ | |
3467 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3468 | deleted -= 1; | |
3469 | } | |
3470 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3471 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3472 | input_section->reloc_count -= deleted; | |
252b5132 RH |
3473 | } |
3474 | ||
b34976b6 | 3475 | return TRUE; |
252b5132 RH |
3476 | } |
3477 | ||
3478 | /* Finish up dynamic symbol handling. We set the contents of various | |
3479 | dynamic sections here. */ | |
3480 | ||
b34976b6 | 3481 | static bfd_boolean |
55fd94b0 AM |
3482 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
3483 | struct bfd_link_info *info, | |
3484 | struct elf_link_hash_entry *h, | |
3485 | Elf_Internal_Sym *sym) | |
252b5132 | 3486 | { |
0afcef53 | 3487 | struct elf_x86_link_hash_table *htab; |
25e762b9 | 3488 | unsigned plt_entry_size; |
0afcef53 | 3489 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3490 | bfd_boolean local_undefweak; |
ee2fdd6f | 3491 | bfd_boolean use_plt_second; |
252b5132 | 3492 | |
0afcef53 | 3493 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
3494 | if (htab == NULL) |
3495 | return FALSE; | |
252b5132 | 3496 | |
765e526c | 3497 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3498 | |
ee2fdd6f L |
3499 | /* Use the second PLT section only if there is .plt section. */ |
3500 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
3501 | ||
0afcef53 | 3502 | eh = (struct elf_x86_link_hash_entry *) h; |
e133d005 L |
3503 | if (eh->no_finish_dynamic_symbol) |
3504 | abort (); | |
dd7e64d4 | 3505 | |
aec6b87e L |
3506 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3507 | resolved undefined weak symbols in executable so that their | |
3508 | references have value 0 at run-time. */ | |
c5bce5c6 | 3509 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3510 | |
252b5132 RH |
3511 | if (h->plt.offset != (bfd_vma) -1) |
3512 | { | |
ee2fdd6f | 3513 | bfd_vma plt_index, plt_offset; |
252b5132 | 3514 | bfd_vma got_offset; |
947216bf AM |
3515 | Elf_Internal_Rela rel; |
3516 | bfd_byte *loc; | |
ee2fdd6f | 3517 | asection *plt, *resolved_plt, *gotplt, *relplt; |
cbe950e9 L |
3518 | |
3519 | /* When building a static executable, use .iplt, .igot.plt and | |
3520 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3521 | if (htab->elf.splt != NULL) |
cbe950e9 | 3522 | { |
6de2ae4a L |
3523 | plt = htab->elf.splt; |
3524 | gotplt = htab->elf.sgotplt; | |
3525 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3526 | } |
3527 | else | |
3528 | { | |
6de2ae4a L |
3529 | plt = htab->elf.iplt; |
3530 | gotplt = htab->elf.igotplt; | |
3531 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3532 | } |
252b5132 | 3533 | |
f3180fa9 | 3534 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
252b5132 RH |
3535 | |
3536 | /* Get the index in the procedure linkage table which | |
3537 | corresponds to this symbol. This is the index of this symbol | |
3538 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3539 | first entry in the procedure linkage table is reserved. |
252b5132 | 3540 | |
cbe950e9 | 3541 | Get the offset into the .got table of the entry that |
252b5132 | 3542 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 3543 | The first three are reserved. |
6bbec505 | 3544 | |
cbe950e9 L |
3545 | For static executables, we don't reserve anything. */ |
3546 | ||
6de2ae4a | 3547 | if (plt == htab->elf.splt) |
cbe950e9 | 3548 | { |
f604c2a2 | 3549 | got_offset = (h->plt.offset / plt_entry_size |
765e526c | 3550 | - htab->plt.has_plt0); |
e1f98742 | 3551 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
3552 | } |
3553 | else | |
3554 | { | |
e1f98742 L |
3555 | got_offset = h->plt.offset / plt_entry_size; |
3556 | got_offset = got_offset * 4; | |
cbe950e9 | 3557 | } |
252b5132 | 3558 | |
f604c2a2 L |
3559 | /* Fill in the entry in the procedure linkage table and update |
3560 | the first slot. */ | |
765e526c | 3561 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
f604c2a2 | 3562 | plt_entry_size); |
ee2fdd6f L |
3563 | |
3564 | if (use_plt_second) | |
3565 | { | |
3566 | const bfd_byte *plt_entry; | |
3567 | if (bfd_link_pic (info)) | |
765e526c | 3568 | plt_entry = htab->non_lazy_plt->pic_plt_entry; |
ee2fdd6f | 3569 | else |
765e526c | 3570 | plt_entry = htab->non_lazy_plt->plt_entry; |
ee2fdd6f | 3571 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c | 3572 | plt_entry, htab->non_lazy_plt->plt_entry_size); |
ee2fdd6f L |
3573 | |
3574 | resolved_plt = htab->plt_second; | |
3575 | plt_offset = eh->plt_second.offset; | |
3576 | } | |
3577 | else | |
3578 | { | |
3579 | resolved_plt = plt; | |
3580 | plt_offset = h->plt.offset; | |
3581 | } | |
3582 | ||
0e1862bb | 3583 | if (! bfd_link_pic (info)) |
252b5132 | 3584 | { |
252b5132 | 3585 | bfd_put_32 (output_bfd, |
cbe950e9 L |
3586 | (gotplt->output_section->vma |
3587 | + gotplt->output_offset | |
252b5132 | 3588 | + got_offset), |
ee2fdd6f | 3589 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3590 | + htab->plt.plt_got_offset); |
eac338cf | 3591 | |
90c14f0c | 3592 | if (htab->elf.target_os == is_vxworks) |
eac338cf PB |
3593 | { |
3594 | int s, k, reloc_index; | |
3595 | ||
3596 | /* Create the R_386_32 relocation referencing the GOT | |
3597 | for this PLT entry. */ | |
3598 | ||
3599 | /* S: Current slot number (zero-based). */ | |
765e526c | 3600 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
07d6d2b8 | 3601 | / htab->plt.plt_entry_size); |
eac338cf | 3602 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 3603 | if (bfd_link_pic (info)) |
eac338cf PB |
3604 | k = PLTRESOLVE_RELOCS_SHLIB; |
3605 | else | |
3606 | k = PLTRESOLVE_RELOCS; | |
3607 | /* Skip the PLTresolve relocations, and the relocations for | |
3608 | the other PLT slots. */ | |
3609 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
765e526c | 3610 | loc = (htab->srelplt2->contents + reloc_index |
eac338cf PB |
3611 | * sizeof (Elf32_External_Rel)); |
3612 | ||
ee2fdd6f L |
3613 | rel.r_offset = (plt->output_section->vma |
3614 | + plt->output_offset | |
eac338cf | 3615 | + h->plt.offset + 2), |
7325306f | 3616 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3617 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
3618 | ||
3619 | /* Create the R_386_32 relocation referencing the beginning of | |
3620 | the PLT for this GOT entry. */ | |
6de2ae4a L |
3621 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
3622 | + htab->elf.sgotplt->output_offset | |
eac338cf | 3623 | + got_offset); |
7325306f | 3624 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 3625 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 3626 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 3627 | } |
252b5132 RH |
3628 | } |
3629 | else | |
3630 | { | |
252b5132 | 3631 | bfd_put_32 (output_bfd, got_offset, |
ee2fdd6f | 3632 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3633 | + htab->plt.plt_got_offset); |
252b5132 RH |
3634 | } |
3635 | ||
aec6b87e L |
3636 | /* Fill in the entry in the global offset table. Leave the entry |
3637 | as zero for undefined weak symbol in PIE. No PLT relocation | |
3638 | against undefined weak symbol in PIE. */ | |
3639 | if (!local_undefweak) | |
cbe950e9 | 3640 | { |
765e526c | 3641 | if (htab->plt.has_plt0) |
f604c2a2 L |
3642 | bfd_put_32 (output_bfd, |
3643 | (plt->output_section->vma | |
3644 | + plt->output_offset | |
3645 | + h->plt.offset | |
765e526c | 3646 | + htab->lazy_plt->plt_lazy_offset), |
f604c2a2 | 3647 | gotplt->contents + got_offset); |
252b5132 | 3648 | |
aec6b87e L |
3649 | /* Fill in the entry in the .rel.plt section. */ |
3650 | rel.r_offset = (gotplt->output_section->vma | |
3651 | + gotplt->output_offset | |
3652 | + got_offset); | |
cf1070f1 | 3653 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 3654 | { |
871b3ab2 | 3655 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
3656 | h->root.root.string, |
3657 | h->root.u.def.section->owner); | |
3658 | ||
aec6b87e L |
3659 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
3660 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
3661 | in the .got.plt section. */ | |
3662 | bfd_put_32 (output_bfd, | |
3663 | (h->root.u.def.value | |
3664 | + h->root.u.def.section->output_section->vma | |
3665 | + h->root.u.def.section->output_offset), | |
3666 | gotplt->contents + got_offset); | |
3667 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3668 | /* R_386_IRELATIVE comes last. */ | |
3669 | plt_index = htab->next_irelative_index--; | |
3670 | } | |
3671 | else | |
3672 | { | |
3673 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
3674 | plt_index = htab->next_jump_slot_index++; | |
3675 | } | |
3676 | ||
3677 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
3678 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
3679 | ||
f604c2a2 L |
3680 | /* Don't fill the second and third slots in PLT entry for |
3681 | static executables nor without PLT0. */ | |
765e526c | 3682 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e L |
3683 | { |
3684 | bfd_put_32 (output_bfd, | |
3685 | plt_index * sizeof (Elf32_External_Rel), | |
3686 | plt->contents + h->plt.offset | |
765e526c | 3687 | + htab->lazy_plt->plt_reloc_offset); |
f604c2a2 L |
3688 | bfd_put_32 (output_bfd, |
3689 | - (h->plt.offset | |
765e526c | 3690 | + htab->lazy_plt->plt_plt_offset + 4), |
f604c2a2 | 3691 | (plt->contents + h->plt.offset |
765e526c | 3692 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 3693 | } |
e1f98742 | 3694 | } |
dd7e64d4 L |
3695 | } |
3696 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
3697 | { | |
3698 | bfd_vma got_offset, plt_offset; | |
3699 | asection *plt, *got, *gotplt; | |
3700 | const bfd_byte *got_plt_entry; | |
3701 | ||
dd7e64d4 L |
3702 | /* Set the entry in the GOT procedure linkage table. */ |
3703 | plt = htab->plt_got; | |
3704 | got = htab->elf.sgot; | |
3705 | gotplt = htab->elf.sgotplt; | |
3706 | got_offset = h->got.offset; | |
3707 | ||
3708 | if (got_offset == (bfd_vma) -1 | |
3709 | || plt == NULL | |
3710 | || got == NULL | |
3711 | || gotplt == NULL) | |
3712 | abort (); | |
3713 | ||
3714 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 3715 | if (! bfd_link_pic (info)) |
252b5132 | 3716 | { |
765e526c | 3717 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 3718 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 3719 | } |
dd7e64d4 L |
3720 | else |
3721 | { | |
765e526c | 3722 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
3723 | got_offset += (got->output_section->vma |
3724 | + got->output_offset | |
3725 | - gotplt->output_section->vma | |
3726 | - gotplt->output_offset); | |
3727 | } | |
3728 | ||
3729 | plt_offset = eh->plt_got.offset; | |
3730 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
765e526c | 3731 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 3732 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 | 3733 | (plt->contents + plt_offset |
765e526c | 3734 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
3735 | } |
3736 | ||
aec6b87e L |
3737 | if (!local_undefweak |
3738 | && !h->def_regular | |
dd7e64d4 L |
3739 | && (h->plt.offset != (bfd_vma) -1 |
3740 | || eh->plt_got.offset != (bfd_vma) -1)) | |
3741 | { | |
3742 | /* Mark the symbol as undefined, rather than as defined in | |
3743 | the .plt section. Leave the value if there were any | |
3744 | relocations where pointer equality matters (this is a clue | |
3745 | for the dynamic linker, to make function pointer | |
3746 | comparisons work between an application and shared | |
3747 | library), otherwise set it to zero. If a function is only | |
3748 | called from a binary, there is no need to slow down | |
3749 | shared libraries because of that. */ | |
3750 | sym->st_shndx = SHN_UNDEF; | |
3751 | if (!h->pointer_equality_needed) | |
3752 | sym->st_value = 0; | |
252b5132 RH |
3753 | } |
3754 | ||
4ec09950 L |
3755 | _bfd_x86_elf_link_fixup_ifunc_symbol (info, htab, h, sym); |
3756 | ||
aec6b87e L |
3757 | /* Don't generate dynamic GOT relocation against undefined weak |
3758 | symbol in executable. */ | |
13ae64f3 | 3759 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
3760 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type) |
3761 | && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 | |
aec6b87e | 3762 | && !local_undefweak) |
252b5132 | 3763 | { |
947216bf | 3764 | Elf_Internal_Rela rel; |
233cc9c1 | 3765 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
3766 | |
3767 | /* This symbol has an entry in the global offset table. Set it | |
3768 | up. */ | |
3769 | ||
6de2ae4a | 3770 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 3771 | abort (); |
252b5132 | 3772 | |
6de2ae4a L |
3773 | rel.r_offset = (htab->elf.sgot->output_section->vma |
3774 | + htab->elf.sgot->output_offset | |
dc810e39 | 3775 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 3776 | |
dd5724d5 AM |
3777 | /* If this is a static link, or it is a -Bsymbolic link and the |
3778 | symbol is defined locally or was forced to be local because | |
3779 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
3780 | The entry in the global offset table will already have been |
3781 | initialized in the relocate_section function. */ | |
710ab287 | 3782 | if (h->def_regular |
0018b0a3 L |
3783 | && h->type == STT_GNU_IFUNC) |
3784 | { | |
233cc9c1 L |
3785 | if (h->plt.offset == (bfd_vma) -1) |
3786 | { | |
3787 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
3788 | if (htab->elf.splt == NULL) | |
3789 | { | |
3790 | /* use .rel[a].iplt section to store .got relocations | |
3791 | in static executable. */ | |
3792 | relgot = htab->elf.irelplt; | |
3793 | } | |
6999821f | 3794 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 3795 | { |
871b3ab2 | 3796 | info->callbacks->minfo (_("Local IFUNC function `%s' in %pB\n"), |
6322e5c5 L |
3797 | h->root.root.string, |
3798 | h->root.u.def.section->owner); | |
3799 | ||
233cc9c1 L |
3800 | bfd_put_32 (output_bfd, |
3801 | (h->root.u.def.value | |
3802 | + h->root.u.def.section->output_section->vma | |
3803 | + h->root.u.def.section->output_offset), | |
3804 | htab->elf.sgot->contents + h->got.offset); | |
3805 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3806 | } | |
3807 | else | |
3808 | goto do_glob_dat; | |
3809 | } | |
3810 | else if (bfd_link_pic (info)) | |
710ab287 L |
3811 | { |
3812 | /* Generate R_386_GLOB_DAT. */ | |
3813 | goto do_glob_dat; | |
3814 | } | |
3815 | else | |
3816 | { | |
cd2b2c10 | 3817 | asection *plt; |
ee2fdd6f | 3818 | bfd_vma plt_offset; |
cd2b2c10 | 3819 | |
710ab287 L |
3820 | if (!h->pointer_equality_needed) |
3821 | abort (); | |
3822 | ||
3823 | /* For non-shared object, we can't use .got.plt, which | |
3824 | contains the real function addres if we need pointer | |
3825 | equality. We load the GOT entry with the PLT entry. */ | |
ee2fdd6f L |
3826 | if (htab->plt_second != NULL) |
3827 | { | |
3828 | plt = htab->plt_second; | |
3829 | plt_offset = eh->plt_second.offset; | |
3830 | } | |
3831 | else | |
3832 | { | |
3833 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
3834 | plt_offset = h->plt.offset; | |
3835 | } | |
710ab287 L |
3836 | bfd_put_32 (output_bfd, |
3837 | (plt->output_section->vma | |
ee2fdd6f | 3838 | + plt->output_offset + plt_offset), |
6de2ae4a | 3839 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
3840 | return TRUE; |
3841 | } | |
0018b0a3 | 3842 | } |
0e1862bb | 3843 | else if (bfd_link_pic (info) |
6999821f | 3844 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
dd5724d5 | 3845 | { |
6725bdbf | 3846 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
3847 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
3848 | } | |
252b5132 RH |
3849 | else |
3850 | { | |
dd5724d5 | 3851 | BFD_ASSERT((h->got.offset & 1) == 0); |
dc1e8a47 | 3852 | do_glob_dat: |
6725bdbf | 3853 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3854 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
3855 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
3856 | } | |
3857 | ||
233cc9c1 | 3858 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
3859 | } |
3860 | ||
f5385ebf | 3861 | if (h->needs_copy) |
252b5132 | 3862 | { |
947216bf | 3863 | Elf_Internal_Rela rel; |
5474d94f | 3864 | asection *s; |
252b5132 RH |
3865 | |
3866 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 3867 | VERIFY_COPY_RELOC (h, htab) |
252b5132 RH |
3868 | |
3869 | rel.r_offset = (h->root.u.def.value | |
3870 | + h->root.u.def.section->output_section->vma | |
3871 | + h->root.u.def.section->output_offset); | |
3872 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 3873 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
3874 | s = htab->elf.sreldynrelro; |
3875 | else | |
3876 | s = htab->elf.srelbss; | |
3877 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
3878 | } |
3879 | ||
b34976b6 | 3880 | return TRUE; |
252b5132 RH |
3881 | } |
3882 | ||
c25bc9fc L |
3883 | /* Finish up local dynamic symbol handling. We set the contents of |
3884 | various dynamic sections here. */ | |
3885 | ||
3886 | static bfd_boolean | |
3887 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
3888 | { | |
3889 | struct elf_link_hash_entry *h | |
3890 | = (struct elf_link_hash_entry *) *slot; | |
3891 | struct bfd_link_info *info | |
23209a78 | 3892 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
3893 | |
3894 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
3895 | h, NULL); | |
3896 | } | |
3897 | ||
aec6b87e L |
3898 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
3899 | here since undefined weak symbol may not be dynamic and may not be | |
3900 | called for elf_i386_finish_dynamic_symbol. */ | |
3901 | ||
3902 | static bfd_boolean | |
3903 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
3904 | void *inf) | |
3905 | { | |
3906 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
3907 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3908 | ||
3909 | if (h->root.type != bfd_link_hash_undefweak | |
3910 | || h->dynindx != -1) | |
3911 | return TRUE; | |
3912 | ||
3913 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 3914 | info, h, NULL); |
aec6b87e L |
3915 | } |
3916 | ||
38701953 AM |
3917 | /* Used to decide how to sort relocs in an optimal manner for the |
3918 | dynamic linker, before writing them out. */ | |
3919 | ||
3920 | static enum elf_reloc_type_class | |
cae1fbbb | 3921 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
3922 | const asection *rel_sec ATTRIBUTE_UNUSED, |
3923 | const Elf_Internal_Rela *rela) | |
38701953 | 3924 | { |
cae1fbbb L |
3925 | bfd *abfd = info->output_bfd; |
3926 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3927 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 3928 | |
d9e3b590 L |
3929 | if (htab->dynsym != NULL |
3930 | && htab->dynsym->contents != NULL) | |
3931 | { | |
3932 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 3933 | dynamic symbols. */ |
d9e3b590 | 3934 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); |
c428ce9d L |
3935 | if (r_symndx != STN_UNDEF) |
3936 | { | |
3937 | Elf_Internal_Sym sym; | |
3938 | if (!bed->s->swap_symbol_in (abfd, | |
3939 | (htab->dynsym->contents | |
3940 | + r_symndx * sizeof (Elf32_External_Sym)), | |
3941 | 0, &sym)) | |
3942 | abort (); | |
d9e3b590 | 3943 | |
c428ce9d L |
3944 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
3945 | return reloc_class_ifunc; | |
3946 | } | |
d9e3b590 | 3947 | } |
cae1fbbb | 3948 | |
55fd94b0 | 3949 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 3950 | { |
c428ce9d L |
3951 | case R_386_IRELATIVE: |
3952 | return reloc_class_ifunc; | |
38701953 AM |
3953 | case R_386_RELATIVE: |
3954 | return reloc_class_relative; | |
3955 | case R_386_JUMP_SLOT: | |
3956 | return reloc_class_plt; | |
3957 | case R_386_COPY: | |
3958 | return reloc_class_copy; | |
3959 | default: | |
3960 | return reloc_class_normal; | |
3961 | } | |
3962 | } | |
3963 | ||
252b5132 RH |
3964 | /* Finish up the dynamic sections. */ |
3965 | ||
b34976b6 | 3966 | static bfd_boolean |
55fd94b0 AM |
3967 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
3968 | struct bfd_link_info *info) | |
252b5132 | 3969 | { |
0afcef53 | 3970 | struct elf_x86_link_hash_table *htab; |
252b5132 | 3971 | |
9577f60b | 3972 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
3973 | if (htab == NULL) |
3974 | return FALSE; | |
3975 | ||
9577f60b L |
3976 | if (!htab->elf.dynamic_sections_created) |
3977 | return TRUE; | |
252b5132 | 3978 | |
9577f60b | 3979 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 3980 | { |
9577f60b L |
3981 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
3982 | really seem like the right value. */ | |
3983 | elf_section_data (htab->elf.splt->output_section) | |
3984 | ->this_hdr.sh_entsize = 4; | |
252b5132 | 3985 | |
9577f60b | 3986 | if (htab->plt.has_plt0) |
252b5132 | 3987 | { |
9577f60b L |
3988 | /* Fill in the special first entry in the procedure linkage |
3989 | table. */ | |
9577f60b L |
3990 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, |
3991 | htab->lazy_plt->plt0_entry_size); | |
3992 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
851b6fa1 | 3993 | htab->plt0_pad_byte, |
9577f60b L |
3994 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
3995 | if (!bfd_link_pic (info)) | |
252b5132 | 3996 | { |
9577f60b L |
3997 | bfd_put_32 (output_bfd, |
3998 | (htab->elf.sgotplt->output_section->vma | |
3999 | + htab->elf.sgotplt->output_offset | |
4000 | + 4), | |
4001 | htab->elf.splt->contents | |
4002 | + htab->lazy_plt->plt0_got1_offset); | |
4003 | bfd_put_32 (output_bfd, | |
4004 | (htab->elf.sgotplt->output_section->vma | |
4005 | + htab->elf.sgotplt->output_offset | |
4006 | + 8), | |
4007 | htab->elf.splt->contents | |
4008 | + htab->lazy_plt->plt0_got2_offset); | |
1f78f649 | 4009 | |
90c14f0c | 4010 | if (htab->elf.target_os == is_vxworks) |
eac338cf | 4011 | { |
9577f60b L |
4012 | Elf_Internal_Rela rel; |
4013 | int num_plts = (htab->elf.splt->size | |
4014 | / htab->plt.plt_entry_size) - 1; | |
4015 | unsigned char *p; | |
4016 | asection *srelplt2 = htab->srelplt2; | |
4017 | ||
4018 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4019 | + 4. On IA32 we use REL relocations so the | |
4020 | addend goes in the PLT directly. */ | |
4021 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4022 | + htab->elf.splt->output_offset | |
4023 | + htab->lazy_plt->plt0_got1_offset); | |
4024 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4025 | R_386_32); | |
4026 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4027 | srelplt2->contents); | |
4028 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4029 | + 8. */ | |
4030 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4031 | + htab->elf.splt->output_offset | |
4032 | + htab->lazy_plt->plt0_got2_offset); | |
4033 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4034 | R_386_32); | |
4035 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4036 | srelplt2->contents + | |
4037 | sizeof (Elf32_External_Rel)); | |
4038 | /* Correct the .rel.plt.unloaded relocations. */ | |
4039 | p = srelplt2->contents; | |
4040 | if (bfd_link_pic (info)) | |
4041 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4042 | else | |
4043 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
eac338cf | 4044 | |
9577f60b | 4045 | for (; num_plts; num_plts--) |
1f78f649 | 4046 | { |
9577f60b | 4047 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
f604c2a2 | 4048 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
1f78f649 | 4049 | R_386_32); |
9577f60b L |
4050 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4051 | p += sizeof (Elf32_External_Rel); | |
f604c2a2 | 4052 | |
9577f60b L |
4053 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
4054 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
4055 | R_386_32); | |
4056 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
4057 | p += sizeof (Elf32_External_Rel); | |
1f78f649 | 4058 | } |
eac338cf PB |
4059 | } |
4060 | } | |
252b5132 | 4061 | } |
fff53dae L |
4062 | } |
4063 | ||
aec6b87e L |
4064 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4065 | if (bfd_link_pie (info)) | |
4066 | bfd_hash_traverse (&info->hash->table, | |
4067 | elf_i386_pie_finish_undefweak_symbol, | |
4068 | info); | |
4069 | ||
b34976b6 | 4070 | return TRUE; |
252b5132 RH |
4071 | } |
4072 | ||
233cc9c1 L |
4073 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4074 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4075 | It has to be done before elf_link_sort_relocs is called so that | |
4076 | dynamic relocations are properly sorted. */ | |
4077 | ||
4078 | static bfd_boolean | |
4079 | elf_i386_output_arch_local_syms | |
4080 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4081 | struct bfd_link_info *info, | |
4082 | void *flaginfo ATTRIBUTE_UNUSED, | |
4083 | int (*func) (void *, const char *, | |
4084 | Elf_Internal_Sym *, | |
4085 | asection *, | |
4086 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4087 | { | |
0afcef53 L |
4088 | struct elf_x86_link_hash_table *htab |
4089 | = elf_x86_hash_table (info, I386_ELF_DATA); | |
233cc9c1 L |
4090 | if (htab == NULL) |
4091 | return FALSE; | |
4092 | ||
4093 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4094 | htab_traverse (htab->loc_hash_table, | |
4095 | elf_i386_finish_local_dynamic_symbol, | |
4096 | info); | |
4097 | ||
4098 | return TRUE; | |
4099 | } | |
4100 | ||
f604c2a2 | 4101 | /* Forward declaration. */ |
765e526c | 4102 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt; |
f604c2a2 L |
4103 | |
4104 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4105 | dynamic relocations. */ | |
4106 | ||
4107 | static long | |
4108 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
4109 | long symcount ATTRIBUTE_UNUSED, | |
4110 | asymbol **syms ATTRIBUTE_UNUSED, | |
4111 | long dynsymcount, | |
4112 | asymbol **dynsyms, | |
4113 | asymbol **ret) | |
4114 | { | |
f493882d | 4115 | long count, i, n; |
f604c2a2 | 4116 | int j; |
f604c2a2 | 4117 | bfd_byte *plt_contents; |
f493882d | 4118 | long relsize; |
765e526c L |
4119 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4120 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4121 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4122 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
f604c2a2 L |
4123 | asection *plt; |
4124 | bfd_vma got_addr; | |
f493882d L |
4125 | enum elf_x86_plt_type plt_type; |
4126 | struct elf_x86_plt plts[] = | |
3972882e | 4127 | { |
f493882d L |
4128 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4129 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
4130 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
4131 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } | |
f604c2a2 | 4132 | }; |
144bed8d | 4133 | |
f604c2a2 | 4134 | *ret = NULL; |
144bed8d | 4135 | |
f604c2a2 L |
4136 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4137 | return 0; | |
3972882e | 4138 | |
f604c2a2 L |
4139 | if (dynsymcount <= 0) |
4140 | return 0; | |
cca5b8b6 | 4141 | |
f604c2a2 L |
4142 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4143 | if (relsize <= 0) | |
4144 | return -1; | |
cca5b8b6 | 4145 | |
f604c2a2 L |
4146 | non_lazy_plt = NULL; |
4147 | /* Silence GCC 6. */ | |
4148 | lazy_plt = NULL; | |
ee2fdd6f L |
4149 | non_lazy_ibt_plt = NULL; |
4150 | lazy_ibt_plt = NULL; | |
90c14f0c | 4151 | switch (get_elf_backend_data (abfd)->target_os) |
144bed8d | 4152 | { |
f604c2a2 | 4153 | case is_normal: |
3b4c3844 | 4154 | case is_solaris: |
f604c2a2 | 4155 | non_lazy_plt = &elf_i386_non_lazy_plt; |
ee2fdd6f L |
4156 | lazy_ibt_plt = &elf_i386_lazy_ibt_plt; |
4157 | non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4158 | /* Fall through */ |
4159 | case is_vxworks: | |
4160 | lazy_plt = &elf_i386_lazy_plt; | |
4161 | break; | |
4162 | case is_nacl: | |
4163 | lazy_plt = &elf_i386_nacl_plt; | |
4164 | break; | |
90c14f0c L |
4165 | default: |
4166 | abort (); | |
f604c2a2 L |
4167 | } |
4168 | ||
4169 | got_addr = 0; | |
3972882e | 4170 | |
f604c2a2 L |
4171 | count = 0; |
4172 | for (j = 0; plts[j].name != NULL; j++) | |
4173 | { | |
4174 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4175 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4176 | continue; |
533d0af0 | 4177 | |
f604c2a2 L |
4178 | /* Get the PLT section contents. */ |
4179 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4180 | if (plt_contents == NULL) | |
4181 | break; | |
4182 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4183 | plt_contents, 0, plt->size)) | |
4184 | { | |
4185 | free (plt_contents); | |
4186 | break; | |
4187 | } | |
4188 | ||
4189 | /* Check what kind of PLT it is. */ | |
4190 | plt_type = plt_unknown; | |
90efb642 L |
4191 | if (plts[j].type == plt_unknown |
4192 | && (plt->size >= (lazy_plt->plt0_entry_size | |
4193 | + lazy_plt->plt_entry_size))) | |
f604c2a2 L |
4194 | { |
4195 | /* Match lazy PLT first. */ | |
4196 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
4197 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4198 | { |
4199 | /* The fist entry in the lazy IBT PLT is the same as the | |
4200 | normal lazy PLT. */ | |
4201 | if (lazy_ibt_plt != NULL | |
90efb642 | 4202 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4203 | lazy_ibt_plt->plt_entry, |
4204 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4205 | plt_type = plt_lazy | plt_second; | |
4206 | else | |
4207 | plt_type = plt_lazy; | |
4208 | } | |
f604c2a2 L |
4209 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, |
4210 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4211 | { |
4212 | /* The fist entry in the PIC lazy IBT PLT is the same as | |
4213 | the normal PIC lazy PLT. */ | |
4214 | if (lazy_ibt_plt != NULL | |
90efb642 | 4215 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4216 | lazy_ibt_plt->pic_plt_entry, |
4217 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4218 | plt_type = plt_lazy | plt_pic | plt_second; | |
4219 | else | |
4220 | plt_type = plt_lazy | plt_pic; | |
4221 | } | |
f604c2a2 L |
4222 | } |
4223 | ||
4224 | if (non_lazy_plt != NULL | |
90efb642 L |
4225 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4226 | && plt->size >= non_lazy_plt->plt_entry_size) | |
f604c2a2 L |
4227 | { |
4228 | /* Match non-lazy PLT. */ | |
4229 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4230 | non_lazy_plt->plt_got_offset) == 0) | |
4231 | plt_type = plt_non_lazy; | |
4232 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
4233 | non_lazy_plt->plt_got_offset) == 0) | |
4234 | plt_type = plt_pic; | |
4235 | } | |
4236 | ||
ee2fdd6f | 4237 | if ((non_lazy_ibt_plt != NULL) |
90efb642 L |
4238 | && (plt_type == plt_unknown || plt_type == plt_second) |
4239 | && plt->size >= non_lazy_ibt_plt->plt_entry_size) | |
ee2fdd6f L |
4240 | { |
4241 | if (memcmp (plt_contents, | |
4242 | non_lazy_ibt_plt->plt_entry, | |
4243 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4244 | { | |
4245 | /* Match IBT PLT. */ | |
4246 | plt_type = plt_second; | |
4247 | non_lazy_plt = non_lazy_ibt_plt; | |
4248 | } | |
4249 | else if (memcmp (plt_contents, | |
4250 | non_lazy_ibt_plt->pic_plt_entry, | |
4251 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4252 | { | |
4253 | /* Match PIC IBT PLT. */ | |
4254 | plt_type = plt_second | plt_pic; | |
4255 | non_lazy_plt = non_lazy_ibt_plt; | |
4256 | } | |
4257 | } | |
4258 | ||
f604c2a2 | 4259 | if (plt_type == plt_unknown) |
37c0b6ee L |
4260 | { |
4261 | free (plt_contents); | |
4262 | continue; | |
4263 | } | |
3972882e | 4264 | |
f604c2a2 L |
4265 | plts[j].sec = plt; |
4266 | plts[j].type = plt_type; | |
ec1f73bb | 4267 | |
f604c2a2 L |
4268 | if ((plt_type & plt_lazy)) |
4269 | { | |
4270 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4271 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4272 | /* Skip PLT0 in lazy PLT. */ | |
4273 | i = 1; | |
4274 | } | |
4275 | else | |
4276 | { | |
4277 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4278 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4279 | i = 0; | |
4280 | } | |
fca6ae69 | 4281 | |
ee2fdd6f L |
4282 | /* Skip lazy PLT when the second PLT is used. */ |
4283 | if ((plt_type & (plt_lazy | plt_second)) | |
4284 | == (plt_lazy | plt_second)) | |
4285 | plts[j].count = 0; | |
4286 | else | |
4287 | { | |
4288 | n = plt->size / plts[j].plt_entry_size; | |
4289 | plts[j].count = n; | |
4290 | count += n - i; | |
4291 | } | |
f604c2a2 L |
4292 | |
4293 | plts[j].contents = plt_contents; | |
4294 | ||
4295 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
4296 | if ((plt_type & plt_pic)) | |
4297 | got_addr = (bfd_vma) -1; | |
144bed8d L |
4298 | } |
4299 | ||
f493882d L |
4300 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4301 | got_addr, plts, dynsyms, | |
4302 | ret); | |
4c45e5c9 JJ |
4303 | } |
4304 | ||
f604c2a2 L |
4305 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
4306 | with GNU properties if found. Otherwise, return NULL. */ | |
4307 | ||
4308 | static bfd * | |
4309 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
4310 | { | |
1de031c8 | 4311 | struct elf_x86_init_table init_table; |
f604c2a2 | 4312 | |
90c14f0c | 4313 | switch (get_elf_backend_data (info->output_bfd)->target_os) |
f604c2a2 L |
4314 | { |
4315 | case is_normal: | |
3b4c3844 | 4316 | case is_solaris: |
851b6fa1 | 4317 | init_table.plt0_pad_byte = 0x0; |
1de031c8 L |
4318 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4319 | init_table.non_lazy_plt = &elf_i386_non_lazy_plt; | |
4320 | init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt; | |
4321 | init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4322 | break; |
4323 | case is_vxworks: | |
851b6fa1 | 4324 | init_table.plt0_pad_byte = 0x90; |
1de031c8 L |
4325 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4326 | init_table.non_lazy_plt = NULL; | |
4327 | init_table.lazy_ibt_plt = NULL; | |
4328 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 L |
4329 | break; |
4330 | case is_nacl: | |
851b6fa1 | 4331 | init_table.plt0_pad_byte = 0x90; |
1de031c8 L |
4332 | init_table.lazy_plt = &elf_i386_nacl_plt; |
4333 | init_table.non_lazy_plt = NULL; | |
4334 | init_table.lazy_ibt_plt = NULL; | |
4335 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 | 4336 | break; |
90c14f0c L |
4337 | default: |
4338 | abort (); | |
f604c2a2 L |
4339 | } |
4340 | ||
1de031c8 L |
4341 | init_table.r_info = elf32_r_info; |
4342 | init_table.r_sym = elf32_r_sym; | |
7a382c1c | 4343 | |
1de031c8 | 4344 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
f604c2a2 L |
4345 | } |
4346 | ||
6d00b590 | 4347 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
4348 | #define TARGET_LITTLE_NAME "elf32-i386" |
4349 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4350 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
4351 | #define ELF_MACHINE_CODE EM_386 |
4352 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
4353 | |
4354 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4355 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4356 | #define elf_backend_want_got_plt 1 |
4357 | #define elf_backend_plt_readonly 1 | |
4358 | #define elf_backend_want_plt_sym 0 | |
4359 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 4360 | #define elf_backend_plt_alignment 4 |
64f52338 | 4361 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 4362 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4363 | #define elf_backend_caches_rawsize 1 |
5474d94f | 4364 | #define elf_backend_want_dynrelro 1 |
252b5132 | 4365 | |
8c29f035 AM |
4366 | /* Support RELA for objdump of prelink objects. */ |
4367 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
4368 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
4369 | ||
dd5724d5 | 4370 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
dd5724d5 | 4371 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 4372 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 4373 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 | 4374 | |
13285a1b | 4375 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 4376 | #define elf_backend_check_relocs elf_i386_check_relocs |
f604c2a2 | 4377 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 4378 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
4379 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
4380 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 4381 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
c5fccbec DJ |
4382 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
4383 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 4384 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca | 4385 | #define elf_backend_relocate_section elf_i386_relocate_section |
f604c2a2 | 4386 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
9f857535 | 4387 | #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol |
dd5724d5 | 4388 | |
a2f63b2e MR |
4389 | #define elf_backend_linux_prpsinfo32_ugid16 TRUE |
4390 | ||
8f56f7a2 L |
4391 | #define elf32_bed elf32_i386_bed |
4392 | ||
252b5132 | 4393 | #include "elf32-target.h" |
2bc3c89a AM |
4394 | |
4395 | /* FreeBSD support. */ | |
4396 | ||
4397 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4398 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
4399 | #undef TARGET_LITTLE_NAME |
4400 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
4401 | #undef ELF_OSABI |
4402 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
4403 | |
4404 | /* The kernel recognizes executables as valid only if they carry a | |
4405 | "FreeBSD" label in the ELF header. So we put this label on all | |
4406 | executables and (for simplicity) also all other object files. */ | |
4407 | ||
ed7e9d0b AM |
4408 | static bfd_boolean |
4409 | elf_i386_fbsd_init_file_header (bfd *abfd, struct bfd_link_info *info) | |
2bc3c89a | 4410 | { |
ed7e9d0b AM |
4411 | if (!_bfd_elf_init_file_header (abfd, info)) |
4412 | return FALSE; | |
2bc3c89a | 4413 | |
2bc3c89a | 4414 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
4415 | { |
4416 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
4417 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
4418 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
4419 | } | |
caf47ea6 | 4420 | #endif |
ed7e9d0b | 4421 | return TRUE; |
2bc3c89a AM |
4422 | } |
4423 | ||
ed7e9d0b AM |
4424 | #undef elf_backend_init_file_header |
4425 | #define elf_backend_init_file_header elf_i386_fbsd_init_file_header | |
571fe01f NC |
4426 | #undef elf32_bed |
4427 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 4428 | |
d8045f23 NC |
4429 | #undef elf_backend_add_symbol_hook |
4430 | ||
2bc3c89a | 4431 | #include "elf32-target.h" |
eac338cf | 4432 | |
ed7e9d0b AM |
4433 | #undef elf_backend_init_file_header |
4434 | ||
a6cc6b3b RO |
4435 | /* Solaris 2. */ |
4436 | ||
4437 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4438 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
4439 | #undef TARGET_LITTLE_NAME |
4440 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
4441 | ||
90c14f0c L |
4442 | #undef ELF_TARGET_OS |
4443 | #define ELF_TARGET_OS is_solaris | |
3b4c3844 | 4444 | |
a6cc6b3b RO |
4445 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
4446 | objects won't be recognized. */ | |
4447 | #undef ELF_OSABI | |
4448 | ||
4449 | #undef elf32_bed | |
4450 | #define elf32_bed elf32_i386_sol2_bed | |
4451 | ||
7dc98aea RO |
4452 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
4453 | boundary. */ | |
84865015 | 4454 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
4455 | #define elf_backend_static_tls_alignment 8 |
4456 | ||
a6cc6b3b RO |
4457 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4458 | ||
4459 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4460 | File, p.63. */ | |
84865015 | 4461 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
4462 | #define elf_backend_want_plt_sym 1 |
4463 | ||
84865015 NC |
4464 | #undef elf_backend_strtab_flags |
4465 | #define elf_backend_strtab_flags SHF_STRINGS | |
4466 | ||
5522f910 | 4467 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
07d6d2b8 | 4468 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised |
5522f910 NC |
4469 | FALSE otherwise. ISECTION is the best guess matching section from the |
4470 | input bfd IBFD, but it might be NULL. */ | |
4471 | ||
84865015 | 4472 | static bfd_boolean |
5522f910 NC |
4473 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
4474 | bfd *obfd ATTRIBUTE_UNUSED, | |
4475 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
4476 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
4477 | { |
4478 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
4479 | and sh_link fields of Solaris specific section types. */ |
4480 | return FALSE; | |
84865015 | 4481 | |
5522f910 | 4482 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
4483 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
4484 | ||
4485 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
4486 | ||
4487 | The following values should be set: | |
07d6d2b8 AM |
4488 | |
4489 | Type Link Info | |
84865015 NC |
4490 | ----------------------------------------------------------------------------- |
4491 | SHT_SUNW_ancillary The section header index of 0 | |
07d6d2b8 AM |
4492 | [0x6fffffee] the associated string table. |
4493 | ||
84865015 | 4494 | SHT_SUNW_capinfo The section header index of For a dynamic object, the |
07d6d2b8 AM |
4495 | [0x6ffffff0] the associated symbol table. section header index of |
4496 | the associated | |
84865015 NC |
4497 | SHT_SUNW_capchain table, |
4498 | otherwise 0. | |
4499 | ||
4500 | SHT_SUNW_symsort The section header index of 0 | |
07d6d2b8 | 4501 | [0x6ffffff1] the associated symbol table. |
84865015 NC |
4502 | |
4503 | SHT_SUNW_tlssort The section header index of 0 | |
07d6d2b8 AM |
4504 | [0x6ffffff2] the associated symbol table. |
4505 | ||
4506 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
4507 | [0x6ffffff3] the associated string table. symbol table index of the | |
4508 | This index is the same string last local symbol, | |
84865015 | 4509 | table used by the SHT_DYNSYM STB_LOCAL. Since |
07d6d2b8 AM |
4510 | section. SHT_SUNW_LDYNSYM only |
4511 | contains local symbols, | |
84865015 NC |
4512 | sh_info is equivalent to |
4513 | the number of symbols in | |
4514 | the table. | |
4515 | ||
07d6d2b8 AM |
4516 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer |
4517 | [0x6ffffff5] the section header index of to named strings, the | |
4518 | the associated section header index of | |
4519 | SHT_SUNW_capinfo table, the associated string | |
4520 | otherwise 0. table, otherwise 0. | |
84865015 | 4521 | |
07d6d2b8 AM |
4522 | SHT_SUNW_move The section header index of 0 |
4523 | [0x6ffffffa] the associated symbol table. | |
4524 | ||
4525 | SHT_SUNW_COMDAT 0 0 | |
84865015 NC |
4526 | [0x6ffffffb] |
4527 | ||
4528 | SHT_SUNW_syminfo The section header index of The section header index | |
07d6d2b8 AM |
4529 | [0x6ffffffc] the associated symbol table. of the associated |
4530 | .dynamic section. | |
84865015 | 4531 | |
07d6d2b8 AM |
4532 | SHT_SUNW_verdef The section header index of The number of version |
4533 | [0x6ffffffd] the associated string table. definitions within the | |
4534 | section. | |
84865015 NC |
4535 | |
4536 | SHT_SUNW_verneed The section header index of The number of version | |
07d6d2b8 AM |
4537 | [0x6ffffffe] the associated string table. dependencies within the |
4538 | section. | |
84865015 | 4539 | |
07d6d2b8 AM |
4540 | SHT_SUNW_versym The section header index of 0 |
4541 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
4542 | } |
4543 | ||
5522f910 NC |
4544 | #undef elf_backend_copy_special_section_fields |
4545 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 4546 | |
a6cc6b3b RO |
4547 | #include "elf32-target.h" |
4548 | ||
bf64a951 L |
4549 | /* Intel MCU support. */ |
4550 | ||
4551 | static bfd_boolean | |
4552 | elf32_iamcu_elf_object_p (bfd *abfd) | |
4553 | { | |
4554 | /* Set the right machine number for an IAMCU elf32 file. */ | |
4555 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
4556 | return TRUE; | |
4557 | } | |
4558 | ||
4559 | #undef TARGET_LITTLE_SYM | |
4560 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
4561 | #undef TARGET_LITTLE_NAME | |
4562 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 4563 | #undef ELF_ARCH |
bf64a951 L |
4564 | #define ELF_ARCH bfd_arch_iamcu |
4565 | ||
4566 | #undef ELF_MACHINE_CODE | |
4567 | #define ELF_MACHINE_CODE EM_IAMCU | |
4568 | ||
90c14f0c | 4569 | #undef ELF_TARGET_OS |
bf64a951 L |
4570 | #undef ELF_OSABI |
4571 | ||
4572 | #undef elf32_bed | |
4573 | #define elf32_bed elf32_iamcu_bed | |
4574 | ||
4575 | #undef elf_backend_object_p | |
4576 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
4577 | ||
4578 | #undef elf_backend_static_tls_alignment | |
4579 | ||
4580 | #undef elf_backend_want_plt_sym | |
07d6d2b8 | 4581 | #define elf_backend_want_plt_sym 0 |
bf64a951 | 4582 | |
84865015 | 4583 | #undef elf_backend_strtab_flags |
5522f910 | 4584 | #undef elf_backend_copy_special_section_fields |
84865015 | 4585 | |
bf64a951 L |
4586 | #include "elf32-target.h" |
4587 | ||
4588 | /* Restore defaults. */ | |
4589 | #undef ELF_ARCH | |
4590 | #define ELF_ARCH bfd_arch_i386 | |
4591 | #undef ELF_MACHINE_CODE | |
4592 | #define ELF_MACHINE_CODE EM_386 | |
4593 | ||
a27e4371 RM |
4594 | /* Native Client support. */ |
4595 | ||
4596 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4597 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
4598 | #undef TARGET_LITTLE_NAME |
4599 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
4600 | #undef elf32_bed | |
4601 | #define elf32_bed elf32_i386_nacl_bed | |
4602 | ||
4603 | #undef ELF_MAXPAGESIZE | |
4604 | #define ELF_MAXPAGESIZE 0x10000 | |
4605 | ||
4606 | /* Restore defaults. */ | |
4607 | #undef ELF_OSABI | |
4608 | #undef elf_backend_want_plt_sym | |
4609 | #define elf_backend_want_plt_sym 0 | |
a27e4371 RM |
4610 | #undef elf_backend_static_tls_alignment |
4611 | ||
4612 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
4613 | ||
4614 | #undef elf_backend_plt_alignment | |
4615 | #define elf_backend_plt_alignment 5 | |
4616 | #define NACL_PLT_ENTRY_SIZE 64 | |
4617 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
4618 | ||
4619 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
4620 | { | |
4621 | 0xff, 0x35, /* pushl contents of address */ | |
07d6d2b8 AM |
4622 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ |
4623 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4624 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
a27e4371 RM |
4625 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ |
4626 | 0xff, 0xe1 /* jmp *%ecx */ | |
4627 | }; | |
4628 | ||
4629 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4630 | { | |
4631 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4632 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
4633 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
4634 | 0xff, 0xe1, /* jmp *%ecx */ | |
4635 | ||
07d6d2b8 | 4636 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4637 | 0x90, |
4638 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4639 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4640 | ||
4641 | /* Lazy GOT entries point here (32-byte aligned). */ | |
4642 | 0x68, /* pushl immediate */ | |
4643 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
4644 | 0xe9, /* jmp relative */ | |
07d6d2b8 | 4645 | 0, 0, 0, 0, /* replaced with offset to .plt. */ |
a27e4371 | 4646 | |
07d6d2b8 | 4647 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4648 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, |
4649 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4650 | 0x90, 0x90 | |
4651 | }; | |
4652 | ||
4653 | static const bfd_byte | |
4654 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
4655 | { | |
4656 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
4657 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
4658 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
4659 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
4660 | |
4661 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
4662 | so pad to that size with nop instructions. */ | |
4663 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
4664 | }; |
4665 | ||
4666 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4667 | { | |
07d6d2b8 AM |
4668 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ |
4669 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
4670 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
4671 | 0xff, 0xe1, /* jmp *%ecx */ | |
a27e4371 | 4672 | |
07d6d2b8 | 4673 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4674 | 0x90, |
4675 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4676 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4677 | ||
4678 | /* Lazy GOT entries point here (32-byte aligned). */ | |
07d6d2b8 AM |
4679 | 0x68, /* pushl immediate */ |
4680 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
4681 | 0xe9, /* jmp relative */ | |
4682 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
a27e4371 | 4683 | |
07d6d2b8 | 4684 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4685 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, |
4686 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4687 | 0x90, 0x90 | |
4688 | }; | |
4689 | ||
4690 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
4691 | { | |
07d6d2b8 AM |
4692 | #if (PLT_CIE_LENGTH != 20 \ |
4693 | || PLT_FDE_LENGTH != 36 \ | |
4694 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
a27e4371 | 4695 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) |
90c14f0c | 4696 | # error "Need PLT_CIE_LENGTH parameters for eh_frame_plt offsets!" |
a27e4371 RM |
4697 | #endif |
4698 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
07d6d2b8 AM |
4699 | 0, 0, 0, 0, /* CIE ID */ |
4700 | 1, /* CIE version */ | |
4701 | 'z', 'R', 0, /* Augmentation string */ | |
4702 | 1, /* Code alignment factor */ | |
4703 | 0x7c, /* Data alignment factor: -4 */ | |
4704 | 8, /* Return address column */ | |
a27e4371 RM |
4705 | 1, /* Augmentation size */ |
4706 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
4707 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
4708 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
4709 | DW_CFA_nop, DW_CFA_nop, | |
4710 | ||
07d6d2b8 | 4711 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ |
a27e4371 | 4712 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ |
07d6d2b8 AM |
4713 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ |
4714 | 0, 0, 0, 0, /* .plt size goes here */ | |
4715 | 0, /* Augmentation size */ | |
4716 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
4717 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
4718 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
4719 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
4720 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
4721 | 13, /* Block length */ | |
4722 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
4723 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
a27e4371 RM |
4724 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, |
4725 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
4726 | DW_CFA_nop, DW_CFA_nop | |
4727 | }; | |
4728 | ||
765e526c | 4729 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt = |
a27e4371 RM |
4730 | { |
4731 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
4732 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
a27e4371 RM |
4733 | elf_i386_nacl_plt_entry, /* plt_entry */ |
4734 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
92e68c1d L |
4735 | NULL, /* plt_tlsdesc_entry */ |
4736 | 0, /* plt_tlsdesc_entry_size*/ | |
4737 | 0, /* plt_tlsdesc_got1_offset */ | |
4738 | 0, /* plt_tlsdesc_got2_offset */ | |
4739 | 0, /* plt_tlsdesc_got1_insn_end */ | |
4740 | 0, /* plt_tlsdesc_got2_insn_end */ | |
765e526c L |
4741 | 2, /* plt0_got1_offset */ |
4742 | 8, /* plt0_got2_offset */ | |
4743 | 0, /* plt0_got2_insn_end */ | |
a27e4371 RM |
4744 | 2, /* plt_got_offset */ |
4745 | 33, /* plt_reloc_offset */ | |
4746 | 38, /* plt_plt_offset */ | |
765e526c L |
4747 | 0, /* plt_got_insn_size */ |
4748 | 0, /* plt_plt_insn_end */ | |
a27e4371 RM |
4749 | 32, /* plt_lazy_offset */ |
4750 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
4751 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
4752 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
f604c2a2 | 4753 | sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
a27e4371 RM |
4754 | }; |
4755 | ||
64b384e1 RM |
4756 | static bfd_boolean |
4757 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
4758 | { | |
4759 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
4760 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
4761 | return TRUE; | |
4762 | } | |
4763 | ||
90c14f0c L |
4764 | #undef ELF_TARGET_OS |
4765 | #define ELF_TARGET_OS is_nacl | |
a27e4371 | 4766 | |
64b384e1 RM |
4767 | #undef elf_backend_object_p |
4768 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
4769 | #undef elf_backend_modify_segment_map |
4770 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6d6c25c8 AM |
4771 | #undef elf_backend_modify_headers |
4772 | #define elf_backend_modify_headers nacl_modify_headers | |
887badb3 RM |
4773 | #undef elf_backend_final_write_processing |
4774 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 4775 | |
a27e4371 RM |
4776 | #include "elf32-target.h" |
4777 | ||
5a68afcf | 4778 | /* Restore defaults. */ |
64b384e1 | 4779 | #undef elf_backend_object_p |
5a68afcf | 4780 | #undef elf_backend_modify_segment_map |
6d6c25c8 | 4781 | #undef elf_backend_modify_headers |
887badb3 | 4782 | #undef elf_backend_final_write_processing |
5a68afcf | 4783 | |
eac338cf PB |
4784 | /* VxWorks support. */ |
4785 | ||
4786 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4787 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
4788 | #undef TARGET_LITTLE_NAME |
4789 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 4790 | #undef ELF_OSABI |
1587442d L |
4791 | #undef ELF_MAXPAGESIZE |
4792 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
4793 | #undef elf_backend_plt_alignment |
4794 | #define elf_backend_plt_alignment 4 | |
eac338cf | 4795 | |
90c14f0c L |
4796 | #undef ELF_TARGET_OS |
4797 | #define ELF_TARGET_OS is_vxworks | |
eac338cf | 4798 | |
13285a1b | 4799 | #undef elf_backend_relocs_compatible |
eac338cf PB |
4800 | #undef elf_backend_add_symbol_hook |
4801 | #define elf_backend_add_symbol_hook \ | |
4802 | elf_vxworks_add_symbol_hook | |
4803 | #undef elf_backend_link_output_symbol_hook | |
4804 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 4805 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
4806 | #undef elf_backend_emit_relocs |
4807 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
4808 | #undef elf_backend_final_write_processing | |
4809 | #define elf_backend_final_write_processing \ | |
4810 | elf_vxworks_final_write_processing | |
7dc98aea | 4811 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
4812 | |
4813 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
4814 | define it. */ | |
4815 | #undef elf_backend_want_plt_sym | |
4816 | #define elf_backend_want_plt_sym 1 | |
4817 | ||
4818 | #undef elf32_bed | |
4819 | #define elf32_bed elf32_i386_vxworks_bed | |
4820 | ||
4821 | #include "elf32-target.h" |