Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
219d1afa | 2 | Copyright (C) 1993-2018 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 * | |
55fd94b0 AM |
197 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
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: | |
349 | break; | |
350 | } | |
351 | ||
352 | TRACE ("Unknown"); | |
353 | return 0; | |
354 | } | |
355 | ||
157090f7 AM |
356 | static reloc_howto_type * |
357 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
358 | const char *r_name) | |
359 | { | |
360 | unsigned int i; | |
361 | ||
362 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
363 | if (elf_howto_table[i].name != NULL | |
364 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
365 | return &elf_howto_table[i]; | |
366 | ||
367 | return NULL; | |
368 | } | |
369 | ||
142411ca L |
370 | static reloc_howto_type * |
371 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 372 | { |
dc47f327 AM |
373 | unsigned int indx; |
374 | ||
375 | if ((indx = r_type) >= R_386_standard | |
376 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
377 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 378 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
379 | >= R_386_ext2 - R_386_ext) |
380 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
381 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 382 | { |
695344c0 | 383 | /* xgettext:c-format */ |
4eca0228 AM |
384 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
385 | abfd, (int) r_type); | |
55fd94b0 | 386 | indx = R_386_NONE; |
252b5132 | 387 | } |
06614111 NC |
388 | /* PR 17512: file: 0f67f69d. */ |
389 | if (elf_howto_table [indx].type != r_type) | |
390 | return NULL; | |
142411ca L |
391 | return &elf_howto_table[indx]; |
392 | } | |
393 | ||
394 | static void | |
395 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
396 | arelent *cache_ptr, | |
397 | Elf_Internal_Rela *dst) | |
398 | { | |
399 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
400 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
401 | } |
402 | ||
403 | /* Return whether a symbol name implies a local label. The UnixWare | |
404 | 2.1 cc generates temporary symbols that start with .X, so we | |
405 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
406 | If so, we should move the .X recognition into | |
407 | _bfd_elf_is_local_label_name. */ | |
408 | ||
b34976b6 | 409 | static bfd_boolean |
55fd94b0 | 410 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
411 | { |
412 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 413 | return TRUE; |
252b5132 RH |
414 | |
415 | return _bfd_elf_is_local_label_name (abfd, name); | |
416 | } | |
417 | \f | |
38701953 | 418 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 419 | |
b34976b6 | 420 | static bfd_boolean |
55fd94b0 | 421 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
422 | { |
423 | int offset; | |
eea6121a | 424 | size_t size; |
38701953 | 425 | |
61adc1a4 | 426 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 427 | { |
61adc1a4 NC |
428 | int pr_version = bfd_get_32 (abfd, note->descdata); |
429 | ||
430 | if (pr_version != 1) | |
07d6d2b8 | 431 | return FALSE; |
61adc1a4 NC |
432 | |
433 | /* pr_cursig */ | |
228e534f | 434 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
435 | |
436 | /* pr_pid */ | |
228e534f | 437 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
438 | |
439 | /* pr_reg */ | |
440 | offset = 28; | |
eea6121a | 441 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
442 | } |
443 | else | |
444 | { | |
445 | switch (note->descsz) | |
446 | { | |
447 | default: | |
448 | return FALSE; | |
38701953 | 449 | |
61adc1a4 NC |
450 | case 144: /* Linux/i386 */ |
451 | /* pr_cursig */ | |
228e534f | 452 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 453 | |
61adc1a4 | 454 | /* pr_pid */ |
228e534f | 455 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 456 | |
61adc1a4 NC |
457 | /* pr_reg */ |
458 | offset = 72; | |
eea6121a | 459 | size = 68; |
38701953 | 460 | |
61adc1a4 NC |
461 | break; |
462 | } | |
38701953 AM |
463 | } |
464 | ||
465 | /* Make a ".reg/999" section. */ | |
466 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 467 | size, note->descpos + offset); |
38701953 AM |
468 | } |
469 | ||
b34976b6 | 470 | static bfd_boolean |
55fd94b0 | 471 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 472 | { |
61adc1a4 | 473 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 474 | { |
61adc1a4 NC |
475 | int pr_version = bfd_get_32 (abfd, note->descdata); |
476 | ||
477 | if (pr_version != 1) | |
b34976b6 | 478 | return FALSE; |
38701953 | 479 | |
228e534f | 480 | elf_tdata (abfd)->core->program |
61adc1a4 | 481 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 482 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
483 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
484 | } | |
485 | else | |
486 | { | |
487 | switch (note->descsz) | |
488 | { | |
489 | default: | |
490 | return FALSE; | |
491 | ||
492 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 493 | elf_tdata (abfd)->core->pid |
261b8d08 | 494 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 495 | elf_tdata (abfd)->core->program |
61adc1a4 | 496 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 497 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
498 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
499 | } | |
38701953 AM |
500 | } |
501 | ||
502 | /* Note that for some reason, a spurious space is tacked | |
503 | onto the end of the args in some (at least one anyway) | |
504 | implementations, so strip it off if it exists. */ | |
38701953 | 505 | { |
228e534f | 506 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
507 | int n = strlen (command); |
508 | ||
509 | if (0 < n && command[n - 1] == ' ') | |
510 | command[n - 1] = '\0'; | |
511 | } | |
512 | ||
b34976b6 | 513 | return TRUE; |
38701953 AM |
514 | } |
515 | \f | |
516 | /* Functions for the i386 ELF linker. | |
517 | ||
518 | In order to gain some understanding of code in this file without | |
519 | knowing all the intricate details of the linker, note the | |
520 | following: | |
521 | ||
522 | Functions named elf_i386_* are called by external routines, other | |
523 | functions are only called locally. elf_i386_* functions appear | |
524 | in this file more or less in the order in which they are called | |
525 | from external routines. eg. elf_i386_check_relocs is called | |
526 | early in the link process, elf_i386_finish_dynamic_sections is | |
527 | one of the last functions. */ | |
528 | ||
f604c2a2 | 529 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 530 | |
f604c2a2 | 531 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 532 | |
f604c2a2 L |
533 | /* The size in bytes of an entry in the non-lazy procedure linkage |
534 | table. */ | |
252b5132 | 535 | |
f604c2a2 L |
536 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
537 | ||
538 | /* The first entry in an absolute lazy procedure linkage table looks | |
539 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
540 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
541 | ||
542 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
543 | { |
544 | 0xff, 0x35, /* pushl contents of address */ | |
545 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
546 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 547 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
548 | }; |
549 | ||
f604c2a2 L |
550 | /* Subsequent entries in an absolute lazy procedure linkage table look |
551 | like this. */ | |
252b5132 | 552 | |
f604c2a2 | 553 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
554 | { |
555 | 0xff, 0x25, /* jmp indirect */ | |
556 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
557 | 0x68, /* pushl immediate */ | |
558 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
559 | 0xe9, /* jmp relative */ | |
560 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
561 | }; | |
562 | ||
f604c2a2 L |
563 | /* The first entry in a PIC lazy procedure linkage table look like |
564 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
565 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 566 | |
f604c2a2 | 567 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
568 | { |
569 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 570 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
571 | }; |
572 | ||
f604c2a2 L |
573 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
574 | this. */ | |
252b5132 | 575 | |
f604c2a2 | 576 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
577 | { |
578 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
579 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
580 | 0x68, /* pushl immediate */ | |
581 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
582 | 0xe9, /* jmp relative */ | |
583 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
584 | }; | |
585 | ||
f604c2a2 | 586 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 587 | |
f604c2a2 | 588 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
589 | { |
590 | 0xff, 0x25, /* jmp indirect */ | |
591 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
592 | 0x66, 0x90 /* xchg %ax,%ax */ | |
593 | }; | |
594 | ||
f604c2a2 L |
595 | /* Entries in the PIC non-lazy procedure linkage table look like |
596 | this. */ | |
dd7e64d4 | 597 | |
f604c2a2 | 598 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
599 | { |
600 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
601 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
602 | 0x66, 0x90 /* xchg %ax,%ax */ | |
603 | }; | |
604 | ||
ee2fdd6f L |
605 | /* The first entry in an absolute IBT-enabled lazy procedure linkage |
606 | table looks like this. */ | |
607 | ||
608 | static const bfd_byte elf_i386_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
609 | { | |
07d6d2b8 AM |
610 | 0xff, 0x35, 0, 0, 0, 0, /* pushl GOT[1] */ |
611 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *GOT[2] */ | |
612 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
613 | }; |
614 | ||
615 | /* Subsequent entries for an absolute IBT-enabled lazy procedure linkage | |
616 | table look like this. Subsequent entries for a PIC IBT-enabled lazy | |
617 | procedure linkage table are the same. */ | |
618 | ||
619 | static const bfd_byte elf_i386_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
620 | { | |
07d6d2b8 AM |
621 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
622 | 0x68, 0, 0, 0, 0, /* pushl immediate */ | |
623 | 0xe9, 0, 0, 0, 0, /* jmp relative */ | |
624 | 0x66, 0x90 /* xchg %ax,%ax */ | |
ee2fdd6f L |
625 | }; |
626 | ||
627 | /* The first entry in a PIC IBT-enabled lazy procedure linkage table | |
628 | look like. */ | |
629 | ||
630 | static const bfd_byte elf_i386_pic_lazy_ibt_plt0_entry[LAZY_PLT_ENTRY_SIZE] = | |
631 | { | |
632 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
07d6d2b8 AM |
633 | 0xff, 0xa3, 8, 0, 0, 0, /* jmp *8(%ebx) */ |
634 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ | |
ee2fdd6f L |
635 | }; |
636 | ||
637 | /* Entries for branches with IBT-enabled in the absolute non-lazey | |
638 | procedure linkage table look like this. They have the same size | |
639 | as the lazy PLT entry. */ | |
640 | ||
641 | static const bfd_byte elf_i386_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
642 | { | |
07d6d2b8 | 643 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
644 | 0xff, 0x25, 0, 0, 0, 0, /* jmp *name@GOT */ |
645 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
646 | }; | |
647 | ||
648 | /* Entries for branches with IBT-enabled in the PIC non-lazey procedure | |
649 | linkage table look like this. They have the same size as the lazy | |
650 | PLT entry. */ | |
651 | ||
652 | static const bfd_byte elf_i386_pic_non_lazy_ibt_plt_entry[LAZY_PLT_ENTRY_SIZE] = | |
653 | { | |
07d6d2b8 | 654 | 0xf3, 0x0f, 0x1e, 0xfb, /* endbr32 */ |
ee2fdd6f L |
655 | 0xff, 0xa3, 0, 0, 0, 0, /* jmp *name@GOT(%ebx) */ |
656 | 0x66, 0x0f, 0x1f, 0x44, 0x00, 0x00 /* nopw 0x0(%rax,%rax,1) */ | |
657 | }; | |
658 | ||
f604c2a2 | 659 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 660 | |
f604c2a2 | 661 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 | 662 | { |
e41b3a13 JJ |
663 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ |
664 | 0, 0, 0, 0, /* CIE ID */ | |
665 | 1, /* CIE version */ | |
666 | 'z', 'R', 0, /* Augmentation string */ | |
667 | 1, /* Code alignment factor */ | |
668 | 0x7c, /* Data alignment factor */ | |
669 | 8, /* Return address column */ | |
670 | 1, /* Augmentation size */ | |
671 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
672 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
673 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
674 | DW_CFA_nop, DW_CFA_nop, | |
675 | ||
676 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
677 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
678 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
679 | 0, 0, 0, 0, /* .plt size goes here */ | |
680 | 0, /* Augmentation size */ | |
681 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
682 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
683 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
684 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
685 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
686 | 11, /* Block length */ | |
687 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
688 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
689 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 690 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
691 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
692 | }; | |
693 | ||
ee2fdd6f L |
694 | /* .eh_frame covering the lazy .plt section with IBT-enabled. */ |
695 | ||
696 | static const bfd_byte elf_i386_eh_frame_lazy_ibt_plt[] = | |
697 | { | |
698 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
699 | 0, 0, 0, 0, /* CIE ID */ | |
700 | 1, /* CIE version */ | |
701 | 'z', 'R', 0, /* Augmentation string */ | |
702 | 1, /* Code alignment factor */ | |
703 | 0x7c, /* Data alignment factor */ | |
704 | 8, /* Return address column */ | |
705 | 1, /* Augmentation size */ | |
706 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
707 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
708 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
709 | DW_CFA_nop, DW_CFA_nop, | |
710 | ||
711 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
712 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
713 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
714 | 0, 0, 0, 0, /* .plt size goes here */ | |
715 | 0, /* Augmentation size */ | |
716 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
717 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
718 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
719 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
720 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
721 | 11, /* Block length */ | |
722 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
723 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
724 | DW_OP_lit15, DW_OP_and, DW_OP_lit9, DW_OP_ge, | |
725 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
726 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
727 | }; | |
728 | ||
f604c2a2 | 729 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 730 | |
f604c2a2 | 731 | static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] = |
fff53dae L |
732 | { |
733 | #define PLT_GOT_FDE_LENGTH 16 | |
734 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
735 | 0, 0, 0, 0, /* CIE ID */ | |
736 | 1, /* CIE version */ | |
737 | 'z', 'R', 0, /* Augmentation string */ | |
738 | 1, /* Code alignment factor */ | |
739 | 0x7c, /* Data alignment factor */ | |
740 | 8, /* Return address column */ | |
741 | 1, /* Augmentation size */ | |
742 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
743 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
744 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
745 | DW_CFA_nop, DW_CFA_nop, | |
746 | ||
747 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
748 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
f604c2a2 L |
749 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
750 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
751 | 0, /* Augmentation size */ |
752 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
753 | }; | |
754 | ||
25e762b9 | 755 | /* These are the standard parameters. */ |
765e526c | 756 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_plt = |
25e762b9 | 757 | { |
07d6d2b8 AM |
758 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
759 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
760 | elf_i386_lazy_plt_entry, /* plt_entry */ | |
761 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
762 | 2, /* plt0_got1_offset */ | |
763 | 8, /* plt0_got2_offset */ | |
764 | 0, /* plt0_got2_insn_end */ | |
765 | 2, /* plt_got_offset */ | |
766 | 7, /* plt_reloc_offset */ | |
767 | 12, /* plt_plt_offset */ | |
768 | 0, /* plt_got_insn_size */ | |
769 | 0, /* plt_plt_insn_end */ | |
770 | 6, /* plt_lazy_offset */ | |
771 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ | |
772 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
773 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 L |
774 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ |
775 | }; | |
776 | ||
765e526c | 777 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_plt = |
f604c2a2 | 778 | { |
07d6d2b8 AM |
779 | elf_i386_non_lazy_plt_entry, /* plt_entry */ |
780 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
781 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
782 | 2, /* plt_got_offset */ | |
783 | 0, /* plt_got_insn_size */ | |
784 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
f604c2a2 | 785 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
25e762b9 | 786 | }; |
ee2fdd6f | 787 | |
765e526c | 788 | static const struct elf_x86_lazy_plt_layout elf_i386_lazy_ibt_plt = |
ee2fdd6f | 789 | { |
07d6d2b8 | 790 | elf_i386_lazy_ibt_plt0_entry, /* plt0_entry */ |
ee2fdd6f | 791 | sizeof (elf_i386_lazy_ibt_plt0_entry), /* plt0_entry_size */ |
07d6d2b8 AM |
792 | elf_i386_lazy_ibt_plt_entry, /* plt_entry */ |
793 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
794 | 2, /* plt0_got1_offset */ | |
795 | 8, /* plt0_got2_offset */ | |
796 | 0, /* plt0_got2_insn_end */ | |
797 | 4+2, /* plt_got_offset */ | |
798 | 4+1, /* plt_reloc_offset */ | |
799 | 4+6, /* plt_plt_offset */ | |
800 | 0, /* plt_got_insn_size */ | |
801 | 0, /* plt_plt_insn_end */ | |
802 | 0, /* plt_lazy_offset */ | |
803 | elf_i386_pic_lazy_ibt_plt0_entry, /* pic_plt0_entry */ | |
804 | elf_i386_lazy_ibt_plt_entry, /* pic_plt_entry */ | |
805 | elf_i386_eh_frame_lazy_ibt_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
806 | sizeof (elf_i386_eh_frame_lazy_ibt_plt) /* eh_frame_plt_size */ |
807 | }; | |
808 | ||
765e526c | 809 | static const struct elf_x86_non_lazy_plt_layout elf_i386_non_lazy_ibt_plt = |
ee2fdd6f | 810 | { |
07d6d2b8 | 811 | elf_i386_non_lazy_ibt_plt_entry, /* plt_entry */ |
ee2fdd6f | 812 | elf_i386_pic_non_lazy_ibt_plt_entry,/* pic_plt_entry */ |
07d6d2b8 AM |
813 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ |
814 | 4+2, /* plt_got_offset */ | |
815 | 0, /* plt_got_insn_size */ | |
816 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
ee2fdd6f L |
817 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ |
818 | }; | |
25e762b9 RM |
819 | \f |
820 | ||
eac338cf PB |
821 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
822 | for the PLTResolve stub and then for each PLT entry. */ | |
823 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
824 | #define PLTRESOLVE_RELOCS 2 | |
825 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
826 | ||
23209a78 | 827 | /* These are the standard parameters. */ |
851b6fa1 | 828 | static const struct elf_x86_backend_data elf_i386_arch_bed = |
23209a78 | 829 | { |
07d6d2b8 | 830 | is_normal /* os */ |
23209a78 RM |
831 | }; |
832 | ||
833 | #define elf_backend_arch_data &elf_i386_arch_bed | |
834 | ||
142411ca L |
835 | /* Return TRUE if the TLS access code sequence support transition |
836 | from R_TYPE. */ | |
837 | ||
838 | static bfd_boolean | |
bedfd056 | 839 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
840 | bfd_byte *contents, |
841 | Elf_Internal_Shdr *symtab_hdr, | |
842 | struct elf_link_hash_entry **sym_hashes, | |
843 | unsigned int r_type, | |
844 | const Elf_Internal_Rela *rel, | |
845 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 846 | { |
6eaa7fb5 | 847 | unsigned int val, type, reg; |
142411ca L |
848 | unsigned long r_symndx; |
849 | struct elf_link_hash_entry *h; | |
850 | bfd_vma offset; | |
6eaa7fb5 | 851 | bfd_byte *call; |
1d4af308 | 852 | bfd_boolean indirect_call; |
142411ca | 853 | |
142411ca | 854 | offset = rel->r_offset; |
13ae64f3 | 855 | switch (r_type) |
142411ca L |
856 | { |
857 | case R_386_TLS_GD: | |
858 | case R_386_TLS_LDM: | |
859 | if (offset < 2 || (rel + 1) >= relend) | |
860 | return FALSE; | |
861 | ||
6eaa7fb5 L |
862 | indirect_call = FALSE; |
863 | call = contents + offset + 4; | |
864 | val = *(call - 5); | |
865 | type = *(call - 6); | |
142411ca L |
866 | if (r_type == R_386_TLS_GD) |
867 | { | |
09e8c3bf | 868 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
869 | leal foo@tlsgd(,%ebx,1), %eax |
870 | call ___tls_get_addr@PLT | |
871 | or | |
872 | leal foo@tlsgd(%ebx) %eax | |
873 | call ___tls_get_addr@PLT | |
874 | nop | |
875 | or | |
876 | leal foo@tlsgd(%reg), %eax | |
877 | call *___tls_get_addr@GOT(%reg) | |
878 | which may be converted to | |
879 | addr32 call ___tls_get_addr | |
142411ca | 880 | can transit to different access model. */ |
6eaa7fb5 L |
881 | if ((offset + 10) > sec->size |
882 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
883 | return FALSE; |
884 | ||
142411ca L |
885 | if (type == 0x04) |
886 | { | |
6eaa7fb5 L |
887 | /* leal foo@tlsgd(,%ebx,1), %eax |
888 | call ___tls_get_addr@PLT */ | |
142411ca L |
889 | if (offset < 3) |
890 | return FALSE; | |
891 | ||
6eaa7fb5 L |
892 | if (*(call - 7) != 0x8d |
893 | || val != 0x1d | |
894 | || call[0] != 0xe8) | |
142411ca L |
895 | return FALSE; |
896 | } | |
897 | else | |
898 | { | |
6eaa7fb5 L |
899 | /* This must be |
900 | leal foo@tlsgd(%ebx), %eax | |
901 | call ___tls_get_addr@PLT | |
902 | nop | |
903 | or | |
904 | leal foo@tlsgd(%reg), %eax | |
905 | call *___tls_get_addr@GOT(%reg) | |
906 | which may be converted to | |
907 | addr32 call ___tls_get_addr | |
908 | ||
909 | %eax can't be used as the GOT base register since it | |
910 | is used to pass parameter to ___tls_get_addr. */ | |
911 | reg = val & 7; | |
912 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
913 | return FALSE; |
914 | ||
6eaa7fb5 L |
915 | indirect_call = call[0] == 0xff; |
916 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
917 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
918 | && !(indirect_call | |
919 | && (call[1] & 0xf8) == 0x90 | |
920 | && (call[1] & 0x7) == reg)) | |
142411ca L |
921 | return FALSE; |
922 | } | |
923 | } | |
924 | else | |
925 | { | |
926 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
927 | leal foo@tlsldm(%ebx), %eax |
928 | call ___tls_get_addr@PLT | |
929 | or | |
930 | leal foo@tlsldm(%reg), %eax | |
931 | call *___tls_get_addr@GOT(%reg) | |
932 | which may be converted to | |
933 | addr32 call ___tls_get_addr | |
142411ca L |
934 | can transit to different access model. */ |
935 | if (type != 0x8d || (offset + 9) > sec->size) | |
936 | return FALSE; | |
937 | ||
6eaa7fb5 L |
938 | /* %eax can't be used as the GOT base register since it is |
939 | used to pass parameter to ___tls_get_addr. */ | |
940 | reg = val & 7; | |
941 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 942 | return FALSE; |
142411ca | 943 | |
6eaa7fb5 L |
944 | indirect_call = call[0] == 0xff; |
945 | if (!(reg == 3 && call[0] == 0xe8) | |
946 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
947 | && !(indirect_call | |
948 | && (call[1] & 0xf8) == 0x90 | |
949 | && (call[1] & 0x7) == reg)) | |
950 | return FALSE; | |
951 | } | |
142411ca L |
952 | |
953 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
954 | if (r_symndx < symtab_hdr->sh_info) | |
955 | return FALSE; | |
956 | ||
957 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1d4af308 | 958 | if (h == NULL |
0afcef53 | 959 | || !((struct elf_x86_link_hash_entry *) h)->tls_get_addr) |
6eaa7fb5 L |
960 | return FALSE; |
961 | else if (indirect_call) | |
962 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
963 | else | |
964 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
965 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
966 | |
967 | case R_386_TLS_IE: | |
968 | /* Check transition from IE access model: | |
969 | movl foo@indntpoff(%rip), %eax | |
970 | movl foo@indntpoff(%rip), %reg | |
971 | addl foo@indntpoff(%rip), %reg | |
972 | */ | |
973 | ||
974 | if (offset < 1 || (offset + 4) > sec->size) | |
975 | return FALSE; | |
976 | ||
977 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
978 | val = bfd_get_8 (abfd, contents + offset - 1); | |
979 | if (val == 0xa1) | |
980 | return TRUE; | |
981 | ||
982 | if (offset < 2) | |
983 | return FALSE; | |
984 | ||
985 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
986 | type = bfd_get_8 (abfd, contents + offset - 2); | |
987 | return ((type == 0x8b || type == 0x03) | |
988 | && (val & 0xc7) == 0x05); | |
989 | ||
990 | case R_386_TLS_GOTIE: | |
991 | case R_386_TLS_IE_32: | |
992 | /* Check transition from {IE_32,GOTIE} access model: | |
993 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
994 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
995 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
996 | */ | |
997 | ||
998 | if (offset < 2 || (offset + 4) > sec->size) | |
999 | return FALSE; | |
1000 | ||
1001 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1002 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1003 | return FALSE; | |
1004 | ||
1005 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1006 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1007 | ||
1008 | case R_386_TLS_GOTDESC: | |
1009 | /* Check transition from GDesc access model: | |
1010 | leal x@tlsdesc(%ebx), %eax | |
1011 | ||
1012 | Make sure it's a leal adding ebx to a 32-bit offset | |
1013 | into any register, although it's probably almost always | |
1014 | going to be eax. */ | |
1015 | ||
1016 | if (offset < 2 || (offset + 4) > sec->size) | |
1017 | return FALSE; | |
1018 | ||
1019 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1020 | return FALSE; | |
1021 | ||
1022 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1023 | return (val & 0xc7) == 0x83; | |
1024 | ||
1025 | case R_386_TLS_DESC_CALL: | |
1026 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1027 | call *x@tlsdesc(%eax) |
142411ca L |
1028 | */ |
1029 | if (offset + 2 <= sec->size) | |
1030 | { | |
6eaa7fb5 L |
1031 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1032 | call = contents + offset; | |
1033 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1034 | } |
1035 | ||
1036 | return FALSE; | |
1037 | ||
1038 | default: | |
1039 | abort (); | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | /* Return TRUE if the TLS access transition is OK or no transition | |
1044 | will be performed. Update R_TYPE if there is a transition. */ | |
1045 | ||
1046 | static bfd_boolean | |
1047 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1048 | asection *sec, bfd_byte *contents, | |
1049 | Elf_Internal_Shdr *symtab_hdr, | |
1050 | struct elf_link_hash_entry **sym_hashes, | |
1051 | unsigned int *r_type, int tls_type, | |
1052 | const Elf_Internal_Rela *rel, | |
1053 | const Elf_Internal_Rela *relend, | |
4c544807 | 1054 | struct elf_link_hash_entry *h, |
bedfd056 L |
1055 | unsigned long r_symndx, |
1056 | bfd_boolean from_relocate_section) | |
142411ca L |
1057 | { |
1058 | unsigned int from_type = *r_type; | |
1059 | unsigned int to_type = from_type; | |
1060 | bfd_boolean check = TRUE; | |
1061 | ||
bb1cb422 L |
1062 | /* Skip TLS transition for functions. */ |
1063 | if (h != NULL | |
1064 | && (h->type == STT_FUNC | |
1065 | || h->type == STT_GNU_IFUNC)) | |
1066 | return TRUE; | |
1067 | ||
142411ca | 1068 | switch (from_type) |
13ae64f3 JJ |
1069 | { |
1070 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1071 | case R_386_TLS_GOTDESC: |
1072 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1073 | case R_386_TLS_IE_32: |
37e55690 JJ |
1074 | case R_386_TLS_IE: |
1075 | case R_386_TLS_GOTIE: | |
0e1862bb | 1076 | if (bfd_link_executable (info)) |
142411ca L |
1077 | { |
1078 | if (h == NULL) | |
1079 | to_type = R_386_TLS_LE_32; | |
1080 | else if (from_type != R_386_TLS_IE | |
1081 | && from_type != R_386_TLS_GOTIE) | |
1082 | to_type = R_386_TLS_IE_32; | |
1083 | } | |
1084 | ||
bedfd056 L |
1085 | /* When we are called from elf_i386_relocate_section, there may |
1086 | be additional transitions based on TLS_TYPE. */ | |
1087 | if (from_relocate_section) | |
142411ca L |
1088 | { |
1089 | unsigned int new_to_type = to_type; | |
1090 | ||
51537393 | 1091 | if (TLS_TRANSITION_IE_TO_LE_P (info, h, tls_type)) |
142411ca L |
1092 | new_to_type = R_386_TLS_LE_32; |
1093 | ||
1094 | if (to_type == R_386_TLS_GD | |
1095 | || to_type == R_386_TLS_GOTDESC | |
1096 | || to_type == R_386_TLS_DESC_CALL) | |
1097 | { | |
1098 | if (tls_type == GOT_TLS_IE_POS) | |
1099 | new_to_type = R_386_TLS_GOTIE; | |
1100 | else if (tls_type & GOT_TLS_IE) | |
1101 | new_to_type = R_386_TLS_IE_32; | |
1102 | } | |
1103 | ||
1104 | /* We checked the transition before when we were called from | |
1105 | elf_i386_check_relocs. We only want to check the new | |
1106 | transition which hasn't been checked before. */ | |
1107 | check = new_to_type != to_type && from_type == to_type; | |
1108 | to_type = new_to_type; | |
1109 | } | |
1110 | ||
1111 | break; | |
1112 | ||
13ae64f3 | 1113 | case R_386_TLS_LDM: |
0e1862bb | 1114 | if (bfd_link_executable (info)) |
142411ca L |
1115 | to_type = R_386_TLS_LE_32; |
1116 | break; | |
1117 | ||
1118 | default: | |
1119 | return TRUE; | |
1120 | } | |
1121 | ||
1122 | /* Return TRUE if there is no transition. */ | |
1123 | if (from_type == to_type) | |
1124 | return TRUE; | |
1125 | ||
1126 | /* Check if the transition can be performed. */ | |
1127 | if (check | |
bedfd056 | 1128 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1129 | symtab_hdr, sym_hashes, |
1130 | from_type, rel, relend)) | |
1131 | { | |
2f629d23 | 1132 | reloc_howto_type *from, *to; |
4c544807 | 1133 | const char *name; |
142411ca L |
1134 | |
1135 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1136 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1137 | ||
4c544807 L |
1138 | if (h) |
1139 | name = h->root.root.string; | |
1140 | else | |
1141 | { | |
0afcef53 | 1142 | struct elf_x86_link_hash_table *htab; |
4dfe6ac6 | 1143 | |
0afcef53 | 1144 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1145 | if (htab == NULL) |
1146 | name = "*unknown*"; | |
1147 | else | |
1148 | { | |
1149 | Elf_Internal_Sym *isym; | |
1150 | ||
1151 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1152 | abfd, r_symndx); | |
1153 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1154 | } | |
4c544807 L |
1155 | } |
1156 | ||
4eca0228 | 1157 | _bfd_error_handler |
695344c0 | 1158 | /* xgettext:c-format */ |
d42c267e | 1159 | (_("%B: TLS transition from %s to %s against `%s' at %#Lx " |
142411ca | 1160 | "in section `%A' failed"), |
c08bb8dd | 1161 | abfd, from->name, to->name, name, |
d42c267e | 1162 | rel->r_offset, sec); |
142411ca L |
1163 | bfd_set_error (bfd_error_bad_value); |
1164 | return FALSE; | |
13ae64f3 JJ |
1165 | } |
1166 | ||
142411ca L |
1167 | *r_type = to_type; |
1168 | return TRUE; | |
13ae64f3 JJ |
1169 | } |
1170 | ||
c175a657 L |
1171 | /* With the local symbol, foo, we convert |
1172 | mov foo@GOT[(%reg1)], %reg2 | |
1173 | to | |
1174 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1175 | and convert | |
1176 | call/jmp *foo@GOT[(%reg)] | |
1177 | to | |
1178 | nop call foo/jmp foo nop | |
1179 | When PIC is false, convert | |
1180 | test %reg1, foo@GOT[(%reg2)] | |
1181 | to | |
1182 | test $foo, %reg1 | |
1183 | and convert | |
1184 | binop foo@GOT[(%reg1)], %reg2 | |
1185 | to | |
1186 | binop $foo, %reg2 | |
1187 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1188 | instructions. */ | |
1189 | ||
1190 | static | |
1191 | bfd_boolean | |
1192 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1193 | bfd_byte *contents, | |
6999821f | 1194 | unsigned int *r_type_p, |
c175a657 L |
1195 | Elf_Internal_Rela *irel, |
1196 | struct elf_link_hash_entry *h, | |
5e5e02ae | 1197 | bfd_boolean *converted, |
c175a657 L |
1198 | struct bfd_link_info *link_info) |
1199 | { | |
0afcef53 | 1200 | struct elf_x86_link_hash_table *htab; |
c175a657 L |
1201 | unsigned int opcode; |
1202 | unsigned int modrm; | |
1203 | bfd_boolean baseless; | |
1204 | Elf_Internal_Sym *isym; | |
1205 | unsigned int addend; | |
1206 | unsigned int nop; | |
1207 | bfd_vma nop_offset; | |
1208 | bfd_boolean is_pic; | |
1209 | bfd_boolean to_reloc_32; | |
1210 | unsigned int r_type; | |
1211 | unsigned int r_symndx; | |
1212 | bfd_vma roff = irel->r_offset; | |
0a27fed7 L |
1213 | bfd_boolean local_ref; |
1214 | struct elf_x86_link_hash_entry *eh; | |
c175a657 L |
1215 | |
1216 | if (roff < 2) | |
1217 | return TRUE; | |
1218 | ||
7d4d9709 | 1219 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1220 | addend = bfd_get_32 (abfd, contents + roff); |
1221 | if (addend != 0) | |
1222 | return TRUE; | |
1223 | ||
0afcef53 | 1224 | htab = elf_x86_hash_table (link_info, I386_ELF_DATA); |
c175a657 L |
1225 | is_pic = bfd_link_pic (link_info); |
1226 | ||
6999821f | 1227 | r_type = *r_type_p; |
c175a657 L |
1228 | r_symndx = ELF32_R_SYM (irel->r_info); |
1229 | ||
1230 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1231 | baseless = (modrm & 0xc7) == 0x5; | |
1232 | ||
7d4d9709 | 1233 | if (baseless && is_pic) |
c175a657 L |
1234 | { |
1235 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1236 | since we don't know what the GOT base is. */ |
c175a657 L |
1237 | const char *name; |
1238 | ||
1239 | if (h == NULL) | |
1240 | { | |
1241 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1242 | r_symndx); | |
1243 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1244 | } | |
1245 | else | |
1246 | name = h->root.root.string; | |
1247 | ||
4eca0228 | 1248 | _bfd_error_handler |
695344c0 | 1249 | /* xgettext:c-format */ |
63a5468a AM |
1250 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base" |
1251 | " register can not be used when making a shared object"), | |
c175a657 L |
1252 | abfd, name); |
1253 | return FALSE; | |
1254 | } | |
1255 | ||
1256 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1257 | ||
c175a657 L |
1258 | /* Convert to R_386_32 if PIC is false or there is no base |
1259 | register. */ | |
1260 | to_reloc_32 = !is_pic || baseless; | |
1261 | ||
0a27fed7 L |
1262 | eh = elf_x86_hash_entry (h); |
1263 | ||
7d4d9709 L |
1264 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1265 | reloc. */ | |
c175a657 L |
1266 | if (h == NULL) |
1267 | { | |
1268 | if (opcode == 0x0ff) | |
1269 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1270 | goto convert_branch; | |
1271 | else | |
1272 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1273 | "test %reg1, foo@GOT(%reg2)" and | |
1274 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1275 | goto convert_load; | |
1276 | } | |
1277 | ||
0a27fed7 L |
1278 | /* NB: Also set linker_def via SYMBOL_REFERENCES_LOCAL_P. */ |
1279 | local_ref = SYMBOL_REFERENCES_LOCAL_P (link_info, h); | |
1280 | ||
c175a657 L |
1281 | /* Undefined weak symbol is only bound locally in executable |
1282 | and its reference is resolved as 0. */ | |
0a27fed7 L |
1283 | if (h->root.type == bfd_link_hash_undefweak |
1284 | && !eh->linker_def | |
1285 | && local_ref) | |
c175a657 L |
1286 | { |
1287 | if (opcode == 0xff) | |
1288 | { | |
1289 | /* No direct branch to 0 for PIC. */ | |
1290 | if (is_pic) | |
1291 | return TRUE; | |
1292 | else | |
1293 | goto convert_branch; | |
1294 | } | |
1295 | else | |
1296 | { | |
1297 | /* We can convert load of address 0 to R_386_32. */ | |
1298 | to_reloc_32 = TRUE; | |
1299 | goto convert_load; | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | if (opcode == 0xff) | |
1304 | { | |
1305 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1306 | if ((h->root.type == bfd_link_hash_defined | |
1307 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1308 | && local_ref) |
c175a657 L |
1309 | { |
1310 | /* The function is locally defined. */ | |
1311 | convert_branch: | |
1312 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1313 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1314 | { | |
1315 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
1316 | is a nop prefix. */ | |
1317 | modrm = 0xe8; | |
6eaa7fb5 L |
1318 | /* To support TLS optimization, always use addr32 prefix |
1319 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1d4af308 | 1320 | if (eh && eh->tls_get_addr) |
c175a657 | 1321 | { |
6eaa7fb5 L |
1322 | nop = 0x67; |
1323 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1324 | } |
1325 | else | |
6eaa7fb5 L |
1326 | { |
1327 | nop = link_info->call_nop_byte; | |
1328 | if (link_info->call_nop_as_suffix) | |
1329 | { | |
1330 | nop_offset = roff + 3; | |
1331 | irel->r_offset -= 1; | |
1332 | } | |
1333 | else | |
1334 | nop_offset = roff - 2; | |
1335 | } | |
c175a657 L |
1336 | } |
1337 | else | |
1338 | { | |
1339 | /* Convert to "jmp foo nop". */ | |
1340 | modrm = 0xe9; | |
1341 | nop = NOP_OPCODE; | |
1342 | nop_offset = roff + 3; | |
1343 | irel->r_offset -= 1; | |
1344 | } | |
1345 | ||
1346 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1347 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1348 | /* When converting to PC-relative relocation, we | |
1349 | need to adjust addend by -4. */ | |
1350 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1351 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
6999821f | 1352 | *r_type_p = R_386_PC32; |
5e5e02ae | 1353 | *converted = TRUE; |
c175a657 L |
1354 | } |
1355 | } | |
1356 | else | |
1357 | { | |
1358 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1359 | "test %reg1, foo@GOT(%reg2)" and | |
1360 | "binop foo@GOT[(%reg1)], %reg2". | |
1361 | ||
1362 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1363 | link-time address. */ | |
1364 | if (h == htab->elf.hdynamic) | |
1365 | return TRUE; | |
1366 | ||
1367 | /* def_regular is set by an assignment in a linker script in | |
cbd0eecf L |
1368 | bfd_elf_record_link_assignment. start_stop is set on |
1369 | __start_SECNAME/__stop_SECNAME which mark section SECNAME. */ | |
1370 | if (h->start_stop | |
0a27fed7 | 1371 | || eh->linker_def |
cbd0eecf L |
1372 | || ((h->def_regular |
1373 | || h->root.type == bfd_link_hash_defined | |
1374 | || h->root.type == bfd_link_hash_defweak) | |
0a27fed7 | 1375 | && local_ref)) |
c175a657 L |
1376 | { |
1377 | convert_load: | |
1378 | if (opcode == 0x8b) | |
1379 | { | |
1380 | if (to_reloc_32) | |
1381 | { | |
1382 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1383 | "mov $foo, %reg2" with R_386_32. */ | |
1384 | r_type = R_386_32; | |
1385 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1386 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1387 | opcode = 0xc7; | |
1388 | } | |
1389 | else | |
1390 | { | |
1391 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1392 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1393 | r_type = R_386_GOTOFF; | |
1394 | opcode = 0x8d; | |
1395 | } | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | /* Only R_386_32 is supported. */ | |
1400 | if (!to_reloc_32) | |
1401 | return TRUE; | |
1402 | ||
1403 | if (opcode == 0x85) | |
1404 | { | |
1405 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1406 | "test $foo, %reg1". */ | |
1407 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1408 | opcode = 0xf7; | |
1409 | } | |
1410 | else | |
1411 | { | |
1412 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1413 | "binop $foo, %reg2". */ | |
1414 | modrm = (0xc0 | |
1415 | | (modrm & 0x38) >> 3 | |
1416 | | (opcode & 0x3c)); | |
1417 | opcode = 0x81; | |
1418 | } | |
1419 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1420 | r_type = R_386_32; | |
1421 | } | |
1422 | ||
1423 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1424 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
6999821f | 1425 | *r_type_p = r_type; |
5e5e02ae | 1426 | *converted = TRUE; |
c175a657 L |
1427 | } |
1428 | } | |
1429 | ||
1430 | return TRUE; | |
1431 | } | |
1432 | ||
c1d11331 L |
1433 | /* Rename some of the generic section flags to better document how they |
1434 | are used here. */ | |
6999821f | 1435 | #define check_relocs_failed sec_flg0 |
c1d11331 | 1436 | |
252b5132 | 1437 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1438 | calculate needed space in the global offset table, procedure linkage |
1439 | table, and dynamic reloc sections. */ | |
252b5132 | 1440 | |
b34976b6 | 1441 | static bfd_boolean |
55fd94b0 AM |
1442 | elf_i386_check_relocs (bfd *abfd, |
1443 | struct bfd_link_info *info, | |
1444 | asection *sec, | |
1445 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1446 | { |
0afcef53 | 1447 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1448 | Elf_Internal_Shdr *symtab_hdr; |
1449 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1450 | const Elf_Internal_Rela *rel; |
1451 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1452 | asection *sreloc; |
bedfd056 | 1453 | bfd_byte *contents; |
5e5e02ae | 1454 | bfd_boolean converted; |
252b5132 | 1455 | |
0e1862bb | 1456 | if (bfd_link_relocatable (info)) |
b34976b6 | 1457 | return TRUE; |
252b5132 | 1458 | |
081b1afe L |
1459 | /* Don't do anything special with non-loaded, non-alloced sections. |
1460 | In particular, any relocs in such sections should not affect GOT | |
1461 | and PLT reference counting (ie. we don't allow them to create GOT | |
1462 | or PLT entries), there's no possibility or desire to optimize TLS | |
1463 | relocs, and there's not much point in propagating relocs to shared | |
1464 | libs that the dynamic linker won't relocate. */ | |
1465 | if ((sec->flags & SEC_ALLOC) == 0) | |
1466 | return TRUE; | |
1467 | ||
0afcef53 | 1468 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 | 1469 | if (htab == NULL) |
c337a162 L |
1470 | { |
1471 | sec->check_relocs_failed = 1; | |
1472 | return FALSE; | |
1473 | } | |
4dfe6ac6 | 1474 | |
fe53b4a4 L |
1475 | BFD_ASSERT (is_x86_elf (abfd, htab)); |
1476 | ||
bedfd056 L |
1477 | /* Get the section contents. */ |
1478 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1479 | contents = elf_section_data (sec)->this_hdr.contents; | |
1480 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1481 | { | |
1482 | sec->check_relocs_failed = 1; | |
1483 | return FALSE; | |
1484 | } | |
1485 | ||
0ffa91dd | 1486 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1487 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1488 | |
5e5e02ae L |
1489 | converted = FALSE; |
1490 | ||
252b5132 RH |
1491 | sreloc = NULL; |
1492 | ||
1493 | rel_end = relocs + sec->reloc_count; | |
1494 | for (rel = relocs; rel < rel_end; rel++) | |
1495 | { | |
13ae64f3 | 1496 | unsigned int r_type; |
d42c267e | 1497 | unsigned int r_symndx; |
252b5132 | 1498 | struct elf_link_hash_entry *h; |
0afcef53 | 1499 | struct elf_x86_link_hash_entry *eh; |
4c544807 L |
1500 | Elf_Internal_Sym *isym; |
1501 | const char *name; | |
06a6a421 | 1502 | bfd_boolean size_reloc; |
252b5132 RH |
1503 | |
1504 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1505 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1506 | |
d9bc7a44 | 1507 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1508 | { |
695344c0 | 1509 | /* xgettext:c-format */ |
4eca0228 AM |
1510 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1511 | abfd, r_symndx); | |
c337a162 | 1512 | goto error_return; |
f5f31454 L |
1513 | } |
1514 | ||
252b5132 | 1515 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1516 | { |
1517 | /* A local symbol. */ | |
c2e61a4e L |
1518 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1519 | abfd, r_symndx); | |
1520 | if (isym == NULL) | |
c337a162 | 1521 | goto error_return; |
c25bc9fc L |
1522 | |
1523 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1524 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1525 | { | |
0afcef53 | 1526 | h = _bfd_elf_x86_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1527 | if (h == NULL) |
c337a162 | 1528 | goto error_return; |
6bbec505 | 1529 | |
c25bc9fc | 1530 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1531 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1532 | isym, NULL); | |
c25bc9fc L |
1533 | h->type = STT_GNU_IFUNC; |
1534 | h->def_regular = 1; | |
1535 | h->ref_regular = 1; | |
1536 | h->forced_local = 1; | |
1537 | h->root.type = bfd_link_hash_defined; | |
1538 | } | |
1539 | else | |
1540 | h = NULL; | |
1541 | } | |
252b5132 | 1542 | else |
71cb9464 | 1543 | { |
4c544807 | 1544 | isym = NULL; |
71cb9464 L |
1545 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1546 | while (h->root.type == bfd_link_hash_indirect | |
1547 | || h->root.type == bfd_link_hash_warning) | |
1548 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1549 | } |
cbe950e9 | 1550 | |
0afcef53 | 1551 | eh = (struct elf_x86_link_hash_entry *) h; |
c25bc9fc L |
1552 | if (h != NULL) |
1553 | { | |
f604c2a2 L |
1554 | if (r_type == R_386_GOTOFF) |
1555 | eh->gotoff_ref = 1; | |
cbe950e9 | 1556 | |
ad1e85de L |
1557 | /* It is referenced by a non-shared object. */ |
1558 | h->ref_regular = 1; | |
13a2df29 L |
1559 | |
1560 | if (h->type == STT_GNU_IFUNC) | |
1561 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1562 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1563 | } |
252b5132 | 1564 | |
6999821f L |
1565 | if (r_type == R_386_GOT32X |
1566 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1567 | { | |
1568 | Elf_Internal_Rela *irel = (Elf_Internal_Rela *) rel; | |
1569 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
5e5e02ae L |
1570 | &r_type, irel, h, |
1571 | &converted, info)) | |
6999821f L |
1572 | goto error_return; |
1573 | } | |
1574 | ||
bedfd056 | 1575 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1576 | symtab_hdr, sym_hashes, |
1577 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1578 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1579 | goto error_return; |
13ae64f3 JJ |
1580 | |
1581 | switch (r_type) | |
252b5132 | 1582 | { |
37e55690 | 1583 | case R_386_TLS_LDM: |
0f09b4d8 | 1584 | htab->tls_ld_or_ldm_got.refcount = 1; |
37e55690 JJ |
1585 | goto create_got; |
1586 | ||
1587 | case R_386_PLT32: | |
1588 | /* This symbol requires a procedure linkage table entry. We | |
1589 | actually build the entry in adjust_dynamic_symbol, | |
1590 | because this might be a case of linking PIC code which is | |
1591 | never referenced by a dynamic object, in which case we | |
1592 | don't need to generate a procedure linkage table entry | |
1593 | after all. */ | |
1594 | ||
1595 | /* If this is a local symbol, we resolve it directly without | |
1596 | creating a procedure linkage table entry. */ | |
1597 | if (h == NULL) | |
1598 | continue; | |
1599 | ||
98b273dc | 1600 | eh->zero_undefweak &= 0x2; |
f5385ebf | 1601 | h->needs_plt = 1; |
79b0c981 | 1602 | h->plt.refcount = 1; |
37e55690 JJ |
1603 | break; |
1604 | ||
6a3e1bae | 1605 | case R_386_SIZE32: |
06a6a421 | 1606 | size_reloc = TRUE; |
6a3e1bae L |
1607 | goto do_size; |
1608 | ||
13ae64f3 | 1609 | case R_386_TLS_IE_32: |
37e55690 JJ |
1610 | case R_386_TLS_IE: |
1611 | case R_386_TLS_GOTIE: | |
0e1862bb | 1612 | if (!bfd_link_executable (info)) |
13ae64f3 | 1613 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1614 | /* Fall through */ |
1615 | ||
252b5132 | 1616 | case R_386_GOT32: |
02a86693 | 1617 | case R_386_GOT32X: |
13ae64f3 | 1618 | case R_386_TLS_GD: |
67a4f2b7 AO |
1619 | case R_386_TLS_GOTDESC: |
1620 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1621 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1622 | { |
1623 | int tls_type, old_tls_type; | |
1624 | ||
1625 | switch (r_type) | |
1626 | { | |
1627 | default: | |
02a86693 L |
1628 | case R_386_GOT32: |
1629 | case R_386_GOT32X: | |
1630 | tls_type = GOT_NORMAL; | |
1631 | break; | |
13ae64f3 | 1632 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1633 | case R_386_TLS_GOTDESC: |
1634 | case R_386_TLS_DESC_CALL: | |
1635 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1636 | case R_386_TLS_IE_32: |
1637 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1638 | tls_type = GOT_TLS_IE_NEG; | |
1639 | else | |
ebcfb3c0 JJ |
1640 | /* If this is a GD->IE transition, we may use either of |
1641 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1642 | tls_type = GOT_TLS_IE; |
1643 | break; | |
1644 | case R_386_TLS_IE: | |
1645 | case R_386_TLS_GOTIE: | |
1646 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1647 | } |
1648 | ||
1649 | if (h != NULL) | |
1650 | { | |
0f09b4d8 | 1651 | h->got.refcount = 1; |
0afcef53 | 1652 | old_tls_type = elf_x86_hash_entry (h)->tls_type; |
13ae64f3 JJ |
1653 | } |
1654 | else | |
1655 | { | |
1656 | bfd_signed_vma *local_got_refcounts; | |
1657 | ||
1658 | /* This is a global offset table entry for a local symbol. */ | |
1659 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1660 | if (local_got_refcounts == NULL) | |
1661 | { | |
1662 | bfd_size_type size; | |
1663 | ||
1664 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1665 | size *= (sizeof (bfd_signed_vma) |
1666 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 | 1667 | local_got_refcounts = (bfd_signed_vma *) |
07d6d2b8 | 1668 | bfd_zalloc (abfd, size); |
13ae64f3 | 1669 | if (local_got_refcounts == NULL) |
c337a162 | 1670 | goto error_return; |
13ae64f3 | 1671 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
0afcef53 | 1672 | elf_x86_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1673 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
0afcef53 | 1674 | elf_x86_local_got_tls_type (abfd) |
67a4f2b7 | 1675 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 | 1676 | } |
0f09b4d8 | 1677 | local_got_refcounts[r_symndx] = 1; |
0afcef53 | 1678 | old_tls_type = elf_x86_local_got_tls_type (abfd) [r_symndx]; |
13ae64f3 JJ |
1679 | } |
1680 | ||
37e55690 JJ |
1681 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1682 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1683 | /* If a TLS symbol is accessed using IE at least once, |
1684 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1685 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1686 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1687 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1688 | { |
67a4f2b7 | 1689 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1690 | tls_type = old_tls_type; |
67a4f2b7 AO |
1691 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1692 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1693 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1694 | else |
1695 | { | |
09a24cbf | 1696 | if (h) |
4c544807 L |
1697 | name = h->root.root.string; |
1698 | else | |
1699 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1700 | NULL); | |
4eca0228 | 1701 | _bfd_error_handler |
695344c0 | 1702 | /* xgettext:c-format */ |
d003868e | 1703 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1704 | "thread local symbol"), |
4c544807 | 1705 | abfd, name); |
68c4a57e | 1706 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 1707 | goto error_return; |
13ae64f3 JJ |
1708 | } |
1709 | } | |
1710 | ||
1711 | if (old_tls_type != tls_type) | |
1712 | { | |
1713 | if (h != NULL) | |
0afcef53 | 1714 | elf_x86_hash_entry (h)->tls_type = tls_type; |
13ae64f3 | 1715 | else |
0afcef53 | 1716 | elf_x86_local_got_tls_type (abfd) [r_symndx] = tls_type; |
13ae64f3 JJ |
1717 | } |
1718 | } | |
0ac8d2ca AM |
1719 | /* Fall through */ |
1720 | ||
1721 | case R_386_GOTOFF: | |
1722 | case R_386_GOTPC: | |
13ae64f3 | 1723 | create_got: |
37e55690 | 1724 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1725 | { |
1726 | if (eh != NULL) | |
98b273dc | 1727 | eh->zero_undefweak &= 0x2; |
aec6b87e L |
1728 | break; |
1729 | } | |
37e55690 | 1730 | /* Fall through */ |
252b5132 | 1731 | |
37e55690 JJ |
1732 | case R_386_TLS_LE_32: |
1733 | case R_386_TLS_LE: | |
aec6b87e | 1734 | if (eh != NULL) |
98b273dc | 1735 | eh->zero_undefweak &= 0x2; |
0e1862bb | 1736 | if (bfd_link_executable (info)) |
37e55690 | 1737 | break; |
bffbf940 | 1738 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1739 | goto do_relocation; |
252b5132 RH |
1740 | |
1741 | case R_386_32: | |
1742 | case R_386_PC32: | |
aec6b87e | 1743 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
98b273dc | 1744 | eh->zero_undefweak |= 0x2; |
aec6b87e | 1745 | do_relocation: |
bf52d7c7 L |
1746 | /* We are called after all symbols have been resolved. Only |
1747 | relocation against STT_GNU_IFUNC symbol must go through | |
1748 | PLT. */ | |
d1ed1c7d L |
1749 | if (h != NULL |
1750 | && (bfd_link_executable (info) | |
bf52d7c7 | 1751 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 1752 | { |
79b0c981 | 1753 | bfd_boolean func_pointer_ref = FALSE; |
233cc9c1 | 1754 | |
4b627c18 L |
1755 | if (r_type == R_386_PC32) |
1756 | { | |
1757 | /* Since something like ".long foo - ." may be used | |
1758 | as pointer, make sure that PLT is used if foo is | |
1759 | a function defined in a shared library. */ | |
1760 | if ((sec->flags & SEC_CODE) == 0) | |
1761 | h->pointer_equality_needed = 1; | |
74437ea2 L |
1762 | else if (h->type == STT_GNU_IFUNC |
1763 | && bfd_link_pic (info)) | |
1764 | { | |
6322e5c5 L |
1765 | _bfd_error_handler |
1766 | /* xgettext:c-format */ | |
1767 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), | |
1768 | abfd, h->root.root.string); | |
74437ea2 L |
1769 | bfd_set_error (bfd_error_bad_value); |
1770 | goto error_return; | |
1771 | } | |
4b627c18 L |
1772 | } |
1773 | else | |
04ebc307 L |
1774 | { |
1775 | h->pointer_equality_needed = 1; | |
1776 | /* R_386_32 can be resolved at run-time. */ | |
1777 | if (r_type == R_386_32 | |
1778 | && (sec->flags & SEC_READONLY) == 0) | |
79b0c981 L |
1779 | func_pointer_ref = TRUE; |
1780 | } | |
1781 | ||
1782 | if (!func_pointer_ref) | |
1783 | { | |
1784 | /* If this reloc is in a read-only section, we might | |
1785 | need a copy reloc. We can't check reliably at this | |
1786 | stage whether the section is read-only, as input | |
1787 | sections have not yet been mapped to output sections. | |
1788 | Tentatively set the flag for now, and correct in | |
1789 | adjust_dynamic_symbol. */ | |
1790 | h->non_got_ref = 1; | |
1791 | ||
1792 | /* We may need a .plt entry if the symbol is a function | |
1793 | defined in a shared lib or is a function referenced | |
1794 | from the code or read-only section. */ | |
1795 | if (!h->def_regular | |
1796 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
1797 | h->plt.refcount = 1; | |
04ebc307 | 1798 | } |
6725bdbf | 1799 | } |
7843f00e | 1800 | |
06a6a421 | 1801 | size_reloc = FALSE; |
6a3e1bae | 1802 | do_size: |
daf1c414 L |
1803 | if (NEED_DYNAMIC_RELOCATION_P (info, h, sec, r_type, |
1804 | R_386_32)) | |
252b5132 | 1805 | { |
e03a8ed8 L |
1806 | struct elf_dyn_relocs *p; |
1807 | struct elf_dyn_relocs **head; | |
ec338859 | 1808 | |
12d0ee4a AM |
1809 | /* We must copy these reloc types into the output file. |
1810 | Create a reloc section in dynobj and make room for | |
1811 | this reloc. */ | |
252b5132 RH |
1812 | if (sreloc == NULL) |
1813 | { | |
83bac4b0 NC |
1814 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1815 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1816 | ||
252b5132 | 1817 | if (sreloc == NULL) |
c337a162 | 1818 | goto error_return; |
252b5132 RH |
1819 | } |
1820 | ||
0c715baa AM |
1821 | /* If this is a global symbol, we count the number of |
1822 | relocations we need for this symbol. */ | |
1823 | if (h != NULL) | |
252b5132 | 1824 | { |
d5597ebc | 1825 | head = &eh->dyn_relocs; |
0c715baa AM |
1826 | } |
1827 | else | |
1828 | { | |
ec338859 AM |
1829 | /* Track dynamic relocs needed for local syms too. |
1830 | We really need local syms available to do this | |
1831 | easily. Oh well. */ | |
87d72d41 | 1832 | void **vpp; |
ec338859 | 1833 | asection *s; |
87d72d41 AM |
1834 | |
1835 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1836 | abfd, r_symndx); | |
1837 | if (isym == NULL) | |
c337a162 | 1838 | goto error_return; |
87d72d41 AM |
1839 | |
1840 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1841 | if (s == NULL) |
87d72d41 | 1842 | s = sec; |
ec338859 | 1843 | |
e81d3500 | 1844 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1845 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1846 | } |
1847 | ||
1848 | p = *head; | |
1849 | if (p == NULL || p->sec != sec) | |
1850 | { | |
1851 | bfd_size_type amt = sizeof *p; | |
a50b1753 | 1852 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
07d6d2b8 | 1853 | amt); |
ec338859 | 1854 | if (p == NULL) |
c337a162 | 1855 | goto error_return; |
ec338859 AM |
1856 | p->next = *head; |
1857 | *head = p; | |
1858 | p->sec = sec; | |
1859 | p->count = 0; | |
1860 | p->pc_count = 0; | |
252b5132 | 1861 | } |
ec338859 AM |
1862 | |
1863 | p->count += 1; | |
06a6a421 L |
1864 | /* Count size relocation as PC-relative relocation. */ |
1865 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1866 | p->pc_count += 1; |
252b5132 | 1867 | } |
252b5132 RH |
1868 | break; |
1869 | ||
1870 | /* This relocation describes the C++ object vtable hierarchy. | |
1871 | Reconstruct it for later use during GC. */ | |
1872 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1873 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 1874 | goto error_return; |
252b5132 RH |
1875 | break; |
1876 | ||
1877 | /* This relocation describes which C++ vtable entries are actually | |
1878 | used. Record for later use during GC. */ | |
1879 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1880 | BFD_ASSERT (h != NULL); |
1881 | if (h != NULL | |
1882 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 1883 | goto error_return; |
252b5132 RH |
1884 | break; |
1885 | ||
1886 | default: | |
1887 | break; | |
1888 | } | |
1889 | } | |
1890 | ||
bedfd056 L |
1891 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1892 | { | |
5e5e02ae | 1893 | if (!converted && !info->keep_memory) |
bedfd056 L |
1894 | free (contents); |
1895 | else | |
1896 | { | |
5e5e02ae L |
1897 | /* Cache the section contents for elf_link_input_bfd if any |
1898 | load is converted or --no-keep-memory isn't used. */ | |
bedfd056 L |
1899 | elf_section_data (sec)->this_hdr.contents = contents; |
1900 | } | |
1901 | } | |
1902 | ||
5e5e02ae L |
1903 | /* Cache relocations if any load is converted. */ |
1904 | if (elf_section_data (sec)->relocs != relocs && converted) | |
1905 | elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs; | |
1906 | ||
b34976b6 | 1907 | return TRUE; |
c337a162 L |
1908 | |
1909 | error_return: | |
bedfd056 L |
1910 | if (elf_section_data (sec)->this_hdr.contents != contents) |
1911 | free (contents); | |
c337a162 L |
1912 | sec->check_relocs_failed = 1; |
1913 | return FALSE; | |
252b5132 RH |
1914 | } |
1915 | ||
38701953 AM |
1916 | /* Set the correct type for an x86 ELF section. We do this by the |
1917 | section name, which is a hack, but ought to work. */ | |
1918 | ||
b34976b6 | 1919 | static bfd_boolean |
55fd94b0 AM |
1920 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
1921 | Elf_Internal_Shdr *hdr, | |
1922 | asection *sec) | |
38701953 | 1923 | { |
91d6fa6a | 1924 | const char *name; |
38701953 AM |
1925 | |
1926 | name = bfd_get_section_name (abfd, sec); | |
1927 | ||
1928 | /* This is an ugly, but unfortunately necessary hack that is | |
1929 | needed when producing EFI binaries on x86. It tells | |
1930 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
1931 | containing ELF relocation info. We need this hack in order to | |
1932 | be able to generate ELF binaries that can be translated into | |
1933 | EFI applications (which are essentially COFF objects). Those | |
1934 | files contain a COFF ".reloc" section inside an ELFNN object, | |
1935 | which would normally cause BFD to segfault because it would | |
1936 | attempt to interpret this section as containing relocation | |
1937 | entries for section "oc". With this hack enabled, ".reloc" | |
1938 | will be treated as a normal data section, which will avoid the | |
1939 | segfault. However, you won't be able to create an ELFNN binary | |
1940 | with a section named "oc" that needs relocations, but that's | |
1941 | the kind of ugly side-effects you get when detecting section | |
1942 | types based on their names... In practice, this limitation is | |
1943 | unlikely to bite. */ | |
1944 | if (strcmp (name, ".reloc") == 0) | |
1945 | hdr->sh_type = SHT_PROGBITS; | |
1946 | ||
b34976b6 | 1947 | return TRUE; |
38701953 AM |
1948 | } |
1949 | ||
13ae64f3 JJ |
1950 | /* Return the relocation value for @tpoff relocation |
1951 | if STT_TLS virtual address is ADDRESS. */ | |
1952 | ||
1953 | static bfd_vma | |
eb4ff4d6 | 1954 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 1955 | { |
e1918d23 | 1956 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
1957 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
1958 | bfd_vma static_tls_size; | |
13ae64f3 | 1959 | |
e1918d23 AM |
1960 | /* If tls_sec is NULL, we should have signalled an error already. */ |
1961 | if (htab->tls_sec == NULL) | |
6a30718d | 1962 | return 0; |
7dc98aea RO |
1963 | |
1964 | /* Consider special static TLS alignment requirements. */ | |
1965 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
1966 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
1967 | } |
1968 | ||
252b5132 RH |
1969 | /* Relocate an i386 ELF section. */ |
1970 | ||
b34976b6 | 1971 | static bfd_boolean |
55fd94b0 AM |
1972 | elf_i386_relocate_section (bfd *output_bfd, |
1973 | struct bfd_link_info *info, | |
1974 | bfd *input_bfd, | |
1975 | asection *input_section, | |
1976 | bfd_byte *contents, | |
1977 | Elf_Internal_Rela *relocs, | |
1978 | Elf_Internal_Sym *local_syms, | |
1979 | asection **local_sections) | |
252b5132 | 1980 | { |
0afcef53 | 1981 | struct elf_x86_link_hash_table *htab; |
252b5132 RH |
1982 | Elf_Internal_Shdr *symtab_hdr; |
1983 | struct elf_link_hash_entry **sym_hashes; | |
1984 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 1985 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 1986 | Elf_Internal_Rela *rel; |
60f2e42e | 1987 | Elf_Internal_Rela *wrel; |
252b5132 | 1988 | Elf_Internal_Rela *relend; |
3348747a | 1989 | bfd_boolean is_vxworks_tls; |
25e762b9 | 1990 | unsigned plt_entry_size; |
252b5132 | 1991 | |
c337a162 L |
1992 | /* Skip if check_relocs failed. */ |
1993 | if (input_section->check_relocs_failed) | |
1994 | return FALSE; | |
1995 | ||
0afcef53 | 1996 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
1997 | if (htab == NULL) |
1998 | return FALSE; | |
fe53b4a4 L |
1999 | |
2000 | BFD_ASSERT (is_x86_elf (input_bfd, htab)); | |
2001 | ||
0ffa91dd | 2002 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
2003 | sym_hashes = elf_sym_hashes (input_bfd); |
2004 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
0afcef53 | 2005 | local_tlsdesc_gotents = elf_x86_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
2006 | /* We have to handle relocations in vxworks .tls_vars sections |
2007 | specially, because the dynamic loader is 'weird'. */ | |
851b6fa1 | 2008 | is_vxworks_tls = (htab->target_os == is_vxworks |
07d6d2b8 | 2009 | && bfd_link_pic (info) |
3348747a NS |
2010 | && !strcmp (input_section->output_section->name, |
2011 | ".tls_vars")); | |
252b5132 | 2012 | |
0afcef53 | 2013 | _bfd_x86_elf_set_tls_module_base (info); |
9f03412a | 2014 | |
765e526c | 2015 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 2016 | |
60f2e42e | 2017 | rel = wrel = relocs; |
252b5132 | 2018 | relend = relocs + input_section->reloc_count; |
60f2e42e | 2019 | for (; rel < relend; wrel++, rel++) |
252b5132 | 2020 | { |
419414ea | 2021 | unsigned int r_type, r_type_tls; |
252b5132 RH |
2022 | reloc_howto_type *howto; |
2023 | unsigned long r_symndx; | |
2024 | struct elf_link_hash_entry *h; | |
0afcef53 | 2025 | struct elf_x86_link_hash_entry *eh; |
252b5132 RH |
2026 | Elf_Internal_Sym *sym; |
2027 | asection *sec; | |
dd7e64d4 | 2028 | bfd_vma off, offplt, plt_offset; |
252b5132 | 2029 | bfd_vma relocation; |
b34976b6 | 2030 | bfd_boolean unresolved_reloc; |
252b5132 | 2031 | bfd_reloc_status_type r; |
1b452ec6 | 2032 | unsigned int indx; |
13ae64f3 | 2033 | int tls_type; |
1788fc08 | 2034 | bfd_vma st_size; |
dd7e64d4 | 2035 | asection *resolved_plt; |
aec6b87e | 2036 | bfd_boolean resolved_to_zero; |
e133d005 | 2037 | bfd_boolean relative_reloc; |
252b5132 RH |
2038 | |
2039 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2040 | if (r_type == R_386_GNU_VTINHERIT |
2041 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
2042 | { |
2043 | if (wrel != rel) | |
2044 | *wrel = *rel; | |
2045 | continue; | |
2046 | } | |
dc47f327 | 2047 | |
55fd94b0 | 2048 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
2049 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
2050 | >= R_386_ext - R_386_standard) | |
2051 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 2052 | >= R_386_ext2 - R_386_ext)) |
47aeb64c NC |
2053 | return _bfd_unrecognized_reloc (input_bfd, input_section, r_type); |
2054 | ||
1b452ec6 | 2055 | howto = elf_howto_table + indx; |
252b5132 RH |
2056 | |
2057 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
2058 | h = NULL; |
2059 | sym = NULL; | |
2060 | sec = NULL; | |
b34976b6 | 2061 | unresolved_reloc = FALSE; |
252b5132 RH |
2062 | if (r_symndx < symtab_hdr->sh_info) |
2063 | { | |
2064 | sym = local_syms + r_symndx; | |
2065 | sec = local_sections[r_symndx]; | |
2066 | relocation = (sec->output_section->vma | |
2067 | + sec->output_offset | |
2068 | + sym->st_value); | |
1788fc08 | 2069 | st_size = sym->st_size; |
ab96bf03 AM |
2070 | |
2071 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
2072 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 2073 | || (bfd_link_relocatable (info) |
ab96bf03 | 2074 | && sec->output_offset != 0))) |
f8df10f4 | 2075 | { |
f8df10f4 | 2076 | bfd_vma addend; |
4a335f3d | 2077 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2078 | |
4a335f3d | 2079 | switch (howto->size) |
f8df10f4 | 2080 | { |
4a335f3d AM |
2081 | case 0: |
2082 | addend = bfd_get_8 (input_bfd, where); | |
2083 | if (howto->pc_relative) | |
2084 | { | |
2085 | addend = (addend ^ 0x80) - 0x80; | |
2086 | addend += 1; | |
2087 | } | |
2088 | break; | |
2089 | case 1: | |
2090 | addend = bfd_get_16 (input_bfd, where); | |
2091 | if (howto->pc_relative) | |
2092 | { | |
2093 | addend = (addend ^ 0x8000) - 0x8000; | |
2094 | addend += 2; | |
2095 | } | |
2096 | break; | |
2097 | case 2: | |
2098 | addend = bfd_get_32 (input_bfd, where); | |
2099 | if (howto->pc_relative) | |
2100 | { | |
2101 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2102 | addend += 4; | |
2103 | } | |
2104 | break; | |
2105 | default: | |
2106 | abort (); | |
f8df10f4 JJ |
2107 | } |
2108 | ||
0e1862bb | 2109 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
2110 | addend += sec->output_offset; |
2111 | else | |
2112 | { | |
2113 | asection *msec = sec; | |
2114 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
2115 | addend); | |
2116 | addend -= relocation; | |
2117 | addend += msec->output_section->vma + msec->output_offset; | |
2118 | } | |
4a335f3d AM |
2119 | |
2120 | switch (howto->size) | |
2121 | { | |
2122 | case 0: | |
16a10388 | 2123 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2124 | if (howto->pc_relative) |
2125 | addend -= 1; | |
2126 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2127 | break; |
2128 | case 1: | |
2129 | if (howto->pc_relative) | |
2130 | addend -= 2; | |
2131 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2132 | break; |
2133 | case 2: | |
2134 | if (howto->pc_relative) | |
2135 | addend -= 4; | |
2136 | bfd_put_32 (input_bfd, addend, where); | |
2137 | break; | |
2138 | } | |
f8df10f4 | 2139 | } |
0e1862bb | 2140 | else if (!bfd_link_relocatable (info) |
1f85278f | 2141 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
2142 | { |
2143 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
0afcef53 L |
2144 | h = _bfd_elf_x86_get_local_sym_hash (htab, input_bfd, rel, |
2145 | FALSE); | |
c25bc9fc L |
2146 | if (h == NULL) |
2147 | abort (); | |
2148 | ||
23209a78 | 2149 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
2150 | h->root.u.def.value = sym->st_value; |
2151 | h->root.u.def.section = sec; | |
2152 | } | |
252b5132 RH |
2153 | } |
2154 | else | |
2155 | { | |
3d540e93 | 2156 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 2157 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 2158 | |
b2a8e766 AM |
2159 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2160 | r_symndx, symtab_hdr, sym_hashes, | |
2161 | h, sec, relocation, | |
62d887d4 | 2162 | unresolved_reloc, warned, ignored); |
1788fc08 | 2163 | st_size = h->size; |
252b5132 RH |
2164 | } |
2165 | ||
dbaa2011 | 2166 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
2167 | { |
2168 | _bfd_clear_contents (howto, input_bfd, input_section, | |
2169 | contents + rel->r_offset); | |
2170 | wrel->r_offset = rel->r_offset; | |
2171 | wrel->r_info = 0; | |
2172 | wrel->r_addend = 0; | |
2173 | ||
2174 | /* For ld -r, remove relocations in debug sections against | |
2175 | sections defined in discarded sections. Not done for | |
2176 | eh_frame editing code expects to be present. */ | |
2177 | if (bfd_link_relocatable (info) | |
2178 | && (input_section->flags & SEC_DEBUGGING)) | |
2179 | wrel--; | |
2180 | ||
2181 | continue; | |
2182 | } | |
9635fe29 | 2183 | |
0e1862bb | 2184 | if (bfd_link_relocatable (info)) |
2d5da473 L |
2185 | { |
2186 | if (wrel != rel) | |
2187 | *wrel = *rel; | |
2188 | continue; | |
2189 | } | |
ab96bf03 | 2190 | |
0afcef53 | 2191 | eh = (struct elf_x86_link_hash_entry *) h; |
ee2fdd6f | 2192 | |
cbe950e9 L |
2193 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2194 | it here if it is defined in a non-shared object. */ | |
2195 | if (h != NULL | |
2196 | && h->type == STT_GNU_IFUNC | |
2197 | && h->def_regular) | |
2198 | { | |
ee2fdd6f | 2199 | asection *gotplt, *base_got; |
cbe950e9 | 2200 | bfd_vma plt_index; |
4c544807 | 2201 | const char *name; |
cbe950e9 | 2202 | |
97dc35c8 L |
2203 | if ((input_section->flags & SEC_ALLOC) == 0) |
2204 | { | |
2205 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
2206 | sections because such sections are not SEC_ALLOC and | |
2207 | thus ld.so will not process them. */ | |
2208 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 2209 | continue; |
97dc35c8 L |
2210 | abort (); |
2211 | } | |
cbe950e9 L |
2212 | |
2213 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2214 | if (htab->elf.splt != NULL) |
cbe950e9 | 2215 | { |
ee2fdd6f L |
2216 | if (htab->plt_second != NULL) |
2217 | { | |
2218 | resolved_plt = htab->plt_second; | |
2219 | plt_offset = eh->plt_second.offset; | |
2220 | } | |
2221 | else | |
2222 | { | |
2223 | resolved_plt = htab->elf.splt; | |
2224 | plt_offset = h->plt.offset; | |
2225 | } | |
6de2ae4a | 2226 | gotplt = htab->elf.sgotplt; |
cbe950e9 L |
2227 | } |
2228 | else | |
2229 | { | |
ee2fdd6f L |
2230 | resolved_plt = htab->elf.iplt; |
2231 | plt_offset = h->plt.offset; | |
6de2ae4a | 2232 | gotplt = htab->elf.igotplt; |
cbe950e9 L |
2233 | } |
2234 | ||
cbe950e9 L |
2235 | switch (r_type) |
2236 | { | |
2237 | default: | |
233cc9c1 | 2238 | break; |
cbe950e9 L |
2239 | |
2240 | case R_386_GOT32: | |
02a86693 | 2241 | case R_386_GOT32X: |
6de2ae4a | 2242 | base_got = htab->elf.sgot; |
cbe950e9 L |
2243 | off = h->got.offset; |
2244 | ||
7afd84dc | 2245 | if (base_got == NULL) |
cbe950e9 L |
2246 | abort (); |
2247 | ||
7afd84dc | 2248 | if (off == (bfd_vma) -1) |
cbe950e9 | 2249 | { |
7afd84dc L |
2250 | /* We can't use h->got.offset here to save state, or |
2251 | even just remember the offset, as finish_dynamic_symbol | |
2252 | would use that as offset into .got. */ | |
6bbec505 | 2253 | |
233cc9c1 L |
2254 | if (h->plt.offset == (bfd_vma) -1) |
2255 | abort (); | |
2256 | ||
6de2ae4a | 2257 | if (htab->elf.splt != NULL) |
7afd84dc | 2258 | { |
f604c2a2 | 2259 | plt_index = (h->plt.offset / plt_entry_size |
765e526c | 2260 | - htab->plt.has_plt0); |
7afd84dc | 2261 | off = (plt_index + 3) * 4; |
6de2ae4a | 2262 | base_got = htab->elf.sgotplt; |
7afd84dc | 2263 | } |
cbe950e9 L |
2264 | else |
2265 | { | |
25e762b9 | 2266 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 2267 | off = plt_index * 4; |
6de2ae4a | 2268 | base_got = htab->elf.igotplt; |
7afd84dc L |
2269 | } |
2270 | ||
2271 | if (h->dynindx == -1 | |
2272 | || h->forced_local | |
2273 | || info->symbolic) | |
2274 | { | |
2275 | /* This references the local defitionion. We must | |
2276 | initialize this entry in the global offset table. | |
2277 | Since the offset must always be a multiple of 8, | |
2278 | we use the least significant bit to record | |
2279 | whether we have initialized it already. | |
2280 | ||
2281 | When doing a dynamic link, we create a .rela.got | |
2282 | relocation entry to initialize the value. This | |
2283 | is done in the finish_dynamic_symbol routine. */ | |
2284 | if ((off & 1) != 0) | |
2285 | off &= ~1; | |
2286 | else | |
2287 | { | |
2288 | bfd_put_32 (output_bfd, relocation, | |
2289 | base_got->contents + off); | |
2290 | h->got.offset |= 1; | |
2291 | } | |
cbe950e9 | 2292 | } |
cbe950e9 | 2293 | |
7afd84dc | 2294 | relocation = off; |
7afd84dc L |
2295 | } |
2296 | else | |
ca8c86ef L |
2297 | relocation = (base_got->output_section->vma |
2298 | + base_got->output_offset + off | |
2299 | - gotplt->output_section->vma | |
2300 | - gotplt->output_offset); | |
2301 | ||
2a568401 L |
2302 | if (rel->r_offset > 1 |
2303 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2304 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
2305 | { |
2306 | if (bfd_link_pic (info)) | |
2307 | goto disallow_got32; | |
2308 | ||
2309 | /* Add the GOT base if there is no base register. */ | |
2310 | relocation += (gotplt->output_section->vma | |
2311 | + gotplt->output_offset); | |
2312 | } | |
2313 | else if (htab->elf.splt == NULL) | |
2314 | { | |
2315 | /* Adjust for static executables. */ | |
2316 | relocation += gotplt->output_offset; | |
2317 | } | |
0018b0a3 | 2318 | |
cbe950e9 | 2319 | goto do_relocation; |
233cc9c1 L |
2320 | } |
2321 | ||
2322 | if (h->plt.offset == (bfd_vma) -1) | |
2323 | { | |
2324 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
2325 | if (r_type == R_386_32 | |
2326 | && (input_section->flags & SEC_CODE) == 0) | |
2327 | goto do_ifunc_pointer; | |
2328 | goto bad_ifunc_reloc; | |
2329 | } | |
2330 | ||
ee2fdd6f L |
2331 | relocation = (resolved_plt->output_section->vma |
2332 | + resolved_plt->output_offset + plt_offset); | |
233cc9c1 L |
2333 | |
2334 | switch (r_type) | |
2335 | { | |
2336 | default: | |
2337 | bad_ifunc_reloc: | |
2338 | if (h->root.root.string) | |
2339 | name = h->root.root.string; | |
2340 | else | |
2341 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2342 | NULL); | |
4eca0228 | 2343 | _bfd_error_handler |
695344c0 | 2344 | /* xgettext:c-format */ |
233cc9c1 L |
2345 | (_("%B: relocation %s against STT_GNU_IFUNC " |
2346 | "symbol `%s' isn't supported"), input_bfd, | |
2347 | howto->name, name); | |
2348 | bfd_set_error (bfd_error_bad_value); | |
2349 | return FALSE; | |
2350 | ||
2351 | case R_386_32: | |
2352 | /* Generate dynamic relcoation only when there is a | |
2353 | non-GOT reference in a shared object. */ | |
2354 | if ((bfd_link_pic (info) && h->non_got_ref) | |
2355 | || h->plt.offset == (bfd_vma) -1) | |
2356 | { | |
2357 | Elf_Internal_Rela outrel; | |
2358 | asection *sreloc; | |
2359 | bfd_vma offset; | |
2360 | ||
2361 | do_ifunc_pointer: | |
2362 | /* Need a dynamic relocation to get the real function | |
2363 | adddress. */ | |
2364 | offset = _bfd_elf_section_offset (output_bfd, | |
2365 | info, | |
2366 | input_section, | |
2367 | rel->r_offset); | |
2368 | if (offset == (bfd_vma) -1 | |
2369 | || offset == (bfd_vma) -2) | |
2370 | abort (); | |
2371 | ||
2372 | outrel.r_offset = (input_section->output_section->vma | |
2373 | + input_section->output_offset | |
2374 | + offset); | |
2375 | ||
cf1070f1 | 2376 | if (POINTER_LOCAL_IFUNC_P (info, h)) |
233cc9c1 | 2377 | { |
6322e5c5 L |
2378 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
2379 | h->root.root.string, | |
2380 | h->root.u.def.section->owner); | |
2381 | ||
233cc9c1 L |
2382 | /* This symbol is resolved locally. */ |
2383 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
2384 | bfd_put_32 (output_bfd, | |
2385 | (h->root.u.def.value | |
2386 | + h->root.u.def.section->output_section->vma | |
2387 | + h->root.u.def.section->output_offset), | |
2388 | contents + offset); | |
2389 | } | |
2390 | else | |
2391 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
2392 | ||
2393 | /* Dynamic relocations are stored in | |
2394 | 1. .rel.ifunc section in PIC object. | |
2395 | 2. .rel.got section in dynamic executable. | |
2396 | 3. .rel.iplt section in static executable. */ | |
2397 | if (bfd_link_pic (info)) | |
2398 | sreloc = htab->elf.irelifunc; | |
2399 | else if (htab->elf.splt != NULL) | |
2400 | sreloc = htab->elf.srelgot; | |
2401 | else | |
2402 | sreloc = htab->elf.irelplt; | |
2403 | elf_append_rel (output_bfd, sreloc, &outrel); | |
2404 | ||
2405 | /* If this reloc is against an external symbol, we | |
2406 | do not want to fiddle with the addend. Otherwise, | |
2407 | we need to include the symbol value so that it | |
2408 | becomes an addend for the dynamic reloc. For an | |
2409 | internal symbol, we have updated addend. */ | |
2410 | continue; | |
2411 | } | |
2412 | /* FALLTHROUGH */ | |
2413 | case R_386_PC32: | |
2414 | case R_386_PLT32: | |
2415 | goto do_relocation; | |
cbe950e9 L |
2416 | |
2417 | case R_386_GOTOFF: | |
2418 | relocation -= (gotplt->output_section->vma | |
2419 | + gotplt->output_offset); | |
2420 | goto do_relocation; | |
2421 | } | |
2422 | } | |
2423 | ||
aec6b87e | 2424 | resolved_to_zero = (eh != NULL |
c5bce5c6 | 2425 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); |
aec6b87e | 2426 | |
252b5132 RH |
2427 | switch (r_type) |
2428 | { | |
02a86693 L |
2429 | case R_386_GOT32X: |
2430 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
2431 | link-time address. */ | |
2432 | if (h == htab->elf.hdynamic) | |
2433 | goto r_386_got32; | |
2434 | ||
2435 | if (bfd_link_pic (info)) | |
2436 | { | |
2437 | /* It is OK to convert mov to lea and convert indirect | |
2438 | branch to direct branch. It is OK to convert adc, | |
2439 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
2440 | is false. */ | |
02e2aef8 L |
2441 | unsigned int opcode, addend; |
2442 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2443 | if (addend != 0) | |
2444 | goto r_386_got32; | |
2445 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
2446 | if (opcode != 0x8b && opcode != 0xff) |
2447 | goto r_386_got32; | |
2448 | } | |
2449 | ||
2450 | /* Resolve "mov GOT[(%reg)], %reg", | |
2451 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
2452 | and "binop foo@GOT[(%reg)], %reg". */ | |
2453 | if (h == NULL | |
2454 | || (h->plt.offset == (bfd_vma) -1 | |
2455 | && h->got.offset == (bfd_vma) -1) | |
2456 | || htab->elf.sgotplt == NULL) | |
2457 | abort (); | |
2458 | ||
2459 | offplt = (htab->elf.sgotplt->output_section->vma | |
2460 | + htab->elf.sgotplt->output_offset); | |
2461 | ||
2462 | /* It is relative to .got.plt section. */ | |
2463 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
2464 | /* Use GOT entry. Mask off the least significant bit in |
2465 | GOT offset which may be set by R_386_GOT32 processing | |
2466 | below. */ | |
02a86693 L |
2467 | relocation = (htab->elf.sgot->output_section->vma |
2468 | + htab->elf.sgot->output_offset | |
32875eb1 | 2469 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
2470 | else |
2471 | /* Use GOTPLT entry. */ | |
f604c2a2 | 2472 | relocation = (h->plt.offset / plt_entry_size |
765e526c | 2473 | - htab->plt.has_plt0 + 3) * 4; |
02a86693 L |
2474 | |
2475 | if (!bfd_link_pic (info)) | |
2476 | { | |
2477 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 2478 | baseless addressing. */ |
02a86693 | 2479 | unsigned int modrm; |
02e2aef8 | 2480 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
2481 | if ((modrm & 0xc7) == 0x5) |
2482 | relocation += offplt; | |
2483 | } | |
2484 | ||
2485 | unresolved_reloc = FALSE; | |
2486 | break; | |
2487 | ||
252b5132 | 2488 | case R_386_GOT32: |
02a86693 | 2489 | r_386_got32: |
252b5132 RH |
2490 | /* Relocation is to the entry for this symbol in the global |
2491 | offset table. */ | |
6de2ae4a | 2492 | if (htab->elf.sgot == NULL) |
ffb2e45b | 2493 | abort (); |
252b5132 | 2494 | |
e133d005 | 2495 | relative_reloc = FALSE; |
252b5132 RH |
2496 | if (h != NULL) |
2497 | { | |
252b5132 | 2498 | off = h->got.offset; |
2eba97c2 | 2499 | if (RESOLVED_LOCALLY_P (info, h, htab)) |
252b5132 | 2500 | { |
2eba97c2 L |
2501 | /* We must initialize this entry in the global offset |
2502 | table. Since the offset must always be a multiple | |
2503 | of 4, we use the least significant bit to record | |
2504 | whether we have initialized it already. | |
252b5132 RH |
2505 | |
2506 | When doing a dynamic link, we create a .rel.got | |
2507 | relocation entry to initialize the value. This | |
2508 | is done in the finish_dynamic_symbol routine. */ | |
2509 | if ((off & 1) != 0) | |
2510 | off &= ~1; | |
2511 | else | |
2512 | { | |
2513 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 2514 | htab->elf.sgot->contents + off); |
252b5132 | 2515 | h->got.offset |= 1; |
e133d005 | 2516 | |
f70656b2 | 2517 | if (GENERATE_RELATIVE_RELOC_P (info, h)) |
e133d005 L |
2518 | { |
2519 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 2520 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 L |
2521 | eh->no_finish_dynamic_symbol = 1; |
2522 | relative_reloc = TRUE; | |
2523 | } | |
252b5132 RH |
2524 | } |
2525 | } | |
8c694914 | 2526 | else |
b34976b6 | 2527 | unresolved_reloc = FALSE; |
252b5132 RH |
2528 | } |
2529 | else | |
2530 | { | |
ffb2e45b AM |
2531 | if (local_got_offsets == NULL) |
2532 | abort (); | |
252b5132 RH |
2533 | |
2534 | off = local_got_offsets[r_symndx]; | |
2535 | ||
2536 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2537 | the least significant bit to record whether we have |
2538 | already generated the necessary reloc. */ | |
252b5132 RH |
2539 | if ((off & 1) != 0) |
2540 | off &= ~1; | |
2541 | else | |
2542 | { | |
6725bdbf | 2543 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 2544 | htab->elf.sgot->contents + off); |
e133d005 | 2545 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 2546 | |
0e1862bb | 2547 | if (bfd_link_pic (info)) |
e133d005 | 2548 | relative_reloc = TRUE; |
252b5132 | 2549 | } |
252b5132 RH |
2550 | } |
2551 | ||
e133d005 L |
2552 | if (relative_reloc) |
2553 | { | |
2554 | asection *s; | |
2555 | Elf_Internal_Rela outrel; | |
2556 | ||
2557 | s = htab->elf.srelgot; | |
2558 | if (s == NULL) | |
2559 | abort (); | |
2560 | ||
2561 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
2562 | + htab->elf.sgot->output_offset | |
2563 | + off); | |
2564 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2565 | elf_append_rel (output_bfd, s, &outrel); | |
2566 | } | |
2567 | ||
ffb2e45b AM |
2568 | if (off >= (bfd_vma) -2) |
2569 | abort (); | |
2570 | ||
74d7f0aa L |
2571 | relocation = (htab->elf.sgot->output_section->vma |
2572 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
2573 | if (rel->r_offset > 1 |
2574 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
2575 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
2576 | { |
2577 | if (bfd_link_pic (info)) | |
2578 | { | |
2579 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
2580 | register, except for "lea foo@GOT, %reg", since |
2581 | we don't know what the GOT base is. */ | |
74d7f0aa L |
2582 | const char *name; |
2583 | ||
712ec279 | 2584 | disallow_got32: |
a5def14f | 2585 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
2586 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
2587 | NULL); | |
2588 | else | |
2589 | name = h->root.root.string; | |
2590 | ||
4eca0228 | 2591 | _bfd_error_handler |
695344c0 | 2592 | /* xgettext:c-format */ |
63a5468a AM |
2593 | (_("%B: direct GOT relocation %s against `%s'" |
2594 | " without base register can not be used" | |
2595 | " when making a shared object"), | |
712ec279 | 2596 | input_bfd, howto->name, name); |
74d7f0aa L |
2597 | bfd_set_error (bfd_error_bad_value); |
2598 | return FALSE; | |
2599 | } | |
2600 | } | |
2601 | else | |
2602 | { | |
2603 | /* Subtract the .got.plt section address only with a base | |
2604 | register. */ | |
2605 | relocation -= (htab->elf.sgotplt->output_section->vma | |
2606 | + htab->elf.sgotplt->output_offset); | |
2607 | } | |
2608 | ||
252b5132 RH |
2609 | break; |
2610 | ||
2611 | case R_386_GOTOFF: | |
2612 | /* Relocation is relative to the start of the global offset | |
2613 | table. */ | |
2614 | ||
3d949995 L |
2615 | /* Check to make sure it isn't a protected function or data |
2616 | symbol for shared library since it may not be local when | |
2617 | used as function address or with copy relocation. We also | |
e3c0e327 | 2618 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 2619 | if (!bfd_link_executable (info) && h) |
90f487df | 2620 | { |
41bed6dd L |
2621 | if (!h->def_regular) |
2622 | { | |
2623 | const char *v; | |
2624 | ||
2625 | switch (ELF_ST_VISIBILITY (h->other)) | |
2626 | { | |
2627 | case STV_HIDDEN: | |
2628 | v = _("hidden symbol"); | |
2629 | break; | |
2630 | case STV_INTERNAL: | |
2631 | v = _("internal symbol"); | |
2632 | break; | |
2633 | case STV_PROTECTED: | |
2634 | v = _("protected symbol"); | |
2635 | break; | |
2636 | default: | |
2637 | v = _("symbol"); | |
2638 | break; | |
2639 | } | |
2640 | ||
4eca0228 | 2641 | _bfd_error_handler |
695344c0 | 2642 | /* xgettext:c-format */ |
63a5468a AM |
2643 | (_("%B: relocation R_386_GOTOFF against undefined %s" |
2644 | " `%s' can not be used when making a shared object"), | |
41bed6dd L |
2645 | input_bfd, v, h->root.root.string); |
2646 | bfd_set_error (bfd_error_bad_value); | |
2647 | return FALSE; | |
2648 | } | |
6999821f | 2649 | else if (!SYMBOL_REFERENCES_LOCAL_P (info, h) |
3d949995 L |
2650 | && (h->type == STT_FUNC |
2651 | || h->type == STT_OBJECT) | |
41bed6dd L |
2652 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
2653 | { | |
4eca0228 | 2654 | _bfd_error_handler |
695344c0 | 2655 | /* xgettext:c-format */ |
63a5468a AM |
2656 | (_("%B: relocation R_386_GOTOFF against protected %s" |
2657 | " `%s' can not be used when making a shared object"), | |
3d949995 L |
2658 | input_bfd, |
2659 | h->type == STT_FUNC ? "function" : "data", | |
2660 | h->root.root.string); | |
41bed6dd L |
2661 | bfd_set_error (bfd_error_bad_value); |
2662 | return FALSE; | |
2663 | } | |
90f487df L |
2664 | } |
2665 | ||
8c37241b JJ |
2666 | /* Note that sgot is not involved in this |
2667 | calculation. We always want the start of .got.plt. If we | |
2668 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
2669 | permitted by the ABI, we might have to change this |
2670 | calculation. */ | |
6de2ae4a L |
2671 | relocation -= htab->elf.sgotplt->output_section->vma |
2672 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
2673 | break; |
2674 | ||
2675 | case R_386_GOTPC: | |
2676 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
2677 | relocation = htab->elf.sgotplt->output_section->vma |
2678 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 2679 | unresolved_reloc = FALSE; |
252b5132 RH |
2680 | break; |
2681 | ||
2682 | case R_386_PLT32: | |
2683 | /* Relocation is to the entry for this symbol in the | |
2684 | procedure linkage table. */ | |
2685 | ||
dd5724d5 | 2686 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2687 | without using the procedure linkage table. */ |
252b5132 RH |
2688 | if (h == NULL) |
2689 | break; | |
2690 | ||
dd7e64d4 L |
2691 | if ((h->plt.offset == (bfd_vma) -1 |
2692 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 2693 | || htab->elf.splt == NULL) |
252b5132 RH |
2694 | { |
2695 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2696 | happens when statically linking PIC code, or when |
2697 | using -Bsymbolic. */ | |
252b5132 RH |
2698 | break; |
2699 | } | |
2700 | ||
dd7e64d4 L |
2701 | if (h->plt.offset != (bfd_vma) -1) |
2702 | { | |
ee2fdd6f L |
2703 | if (htab->plt_second != NULL) |
2704 | { | |
2705 | resolved_plt = htab->plt_second; | |
2706 | plt_offset = eh->plt_second.offset; | |
2707 | } | |
2708 | else | |
2709 | { | |
2710 | resolved_plt = htab->elf.splt; | |
2711 | plt_offset = h->plt.offset; | |
2712 | } | |
dd7e64d4 L |
2713 | } |
2714 | else | |
2715 | { | |
2716 | resolved_plt = htab->plt_got; | |
2717 | plt_offset = eh->plt_got.offset; | |
2718 | } | |
2719 | ||
2720 | relocation = (resolved_plt->output_section->vma | |
2721 | + resolved_plt->output_offset | |
2722 | + plt_offset); | |
b34976b6 | 2723 | unresolved_reloc = FALSE; |
252b5132 RH |
2724 | break; |
2725 | ||
1788fc08 | 2726 | case R_386_SIZE32: |
1788fc08 L |
2727 | /* Set to symbol size. */ |
2728 | relocation = st_size; | |
2729 | /* Fall through. */ | |
2730 | ||
252b5132 RH |
2731 | case R_386_32: |
2732 | case R_386_PC32: | |
3348747a NS |
2733 | if ((input_section->flags & SEC_ALLOC) == 0 |
2734 | || is_vxworks_tls) | |
ec338859 AM |
2735 | break; |
2736 | ||
aebcc8ff L |
2737 | if (GENERATE_DYNAMIC_RELOCATION_P (info, eh, r_type, |
2738 | FALSE, resolved_to_zero, | |
2739 | (r_type == R_386_PC32))) | |
252b5132 | 2740 | { |
947216bf | 2741 | Elf_Internal_Rela outrel; |
b34976b6 | 2742 | bfd_boolean skip, relocate; |
0c715baa | 2743 | asection *sreloc; |
252b5132 RH |
2744 | |
2745 | /* When generating a shared object, these relocations | |
2746 | are copied into the output file to be resolved at run | |
2747 | time. */ | |
2748 | ||
b34976b6 AM |
2749 | skip = FALSE; |
2750 | relocate = FALSE; | |
252b5132 | 2751 | |
c629eae0 JJ |
2752 | outrel.r_offset = |
2753 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2754 | rel->r_offset); | |
2755 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2756 | skip = TRUE; |
0bb2d96a | 2757 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2758 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
2759 | outrel.r_offset += (input_section->output_section->vma |
2760 | + input_section->output_offset); | |
2761 | ||
2762 | if (skip) | |
0bb2d96a | 2763 | memset (&outrel, 0, sizeof outrel); |
e74399c4 | 2764 | else if (COPY_INPUT_RELOC_P (info, h, r_type)) |
0bb2d96a | 2765 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2766 | else |
2767 | { | |
5a15f56f | 2768 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2769 | relocate = TRUE; |
5a15f56f | 2770 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
2771 | } |
2772 | ||
cbe950e9 | 2773 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 2774 | |
62d78908 L |
2775 | if (sreloc == NULL || sreloc->contents == NULL) |
2776 | { | |
2777 | r = bfd_reloc_notsupported; | |
2778 | goto check_relocation_error; | |
2779 | } | |
0c715baa | 2780 | |
59d6ffb2 | 2781 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
2782 | |
2783 | /* If this reloc is against an external symbol, we do | |
2784 | not want to fiddle with the addend. Otherwise, we | |
2785 | need to include the symbol value so that it becomes | |
2786 | an addend for the dynamic reloc. */ | |
0f88be7a | 2787 | if (! relocate) |
252b5132 RH |
2788 | continue; |
2789 | } | |
252b5132 RH |
2790 | break; |
2791 | ||
37e55690 | 2792 | case R_386_TLS_IE: |
0e1862bb | 2793 | if (!bfd_link_executable (info)) |
37e55690 | 2794 | { |
947216bf | 2795 | Elf_Internal_Rela outrel; |
37e55690 | 2796 | asection *sreloc; |
37e55690 JJ |
2797 | |
2798 | outrel.r_offset = rel->r_offset | |
2799 | + input_section->output_section->vma | |
2800 | + input_section->output_offset; | |
2801 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2802 | sreloc = elf_section_data (input_section)->sreloc; | |
2803 | if (sreloc == NULL) | |
2804 | abort (); | |
59d6ffb2 | 2805 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
2806 | } |
2807 | /* Fall through */ | |
2808 | ||
13ae64f3 | 2809 | case R_386_TLS_GD: |
67a4f2b7 AO |
2810 | case R_386_TLS_GOTDESC: |
2811 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 2812 | case R_386_TLS_IE_32: |
37e55690 | 2813 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
2814 | tls_type = GOT_UNKNOWN; |
2815 | if (h == NULL && local_got_offsets) | |
0afcef53 | 2816 | tls_type = elf_x86_local_got_tls_type (input_bfd) [r_symndx]; |
13ae64f3 | 2817 | else if (h != NULL) |
0afcef53 | 2818 | tls_type = elf_x86_hash_entry(h)->tls_type; |
37e55690 JJ |
2819 | if (tls_type == GOT_TLS_IE) |
2820 | tls_type = GOT_TLS_IE_NEG; | |
142411ca | 2821 | |
419414ea | 2822 | r_type_tls = r_type; |
142411ca L |
2823 | if (! elf_i386_tls_transition (info, input_bfd, |
2824 | input_section, contents, | |
2825 | symtab_hdr, sym_hashes, | |
419414ea | 2826 | &r_type_tls, tls_type, rel, |
bedfd056 | 2827 | relend, h, r_symndx, TRUE)) |
142411ca | 2828 | return FALSE; |
13ae64f3 | 2829 | |
419414ea | 2830 | if (r_type_tls == R_386_TLS_LE_32) |
13ae64f3 | 2831 | { |
82e51918 | 2832 | BFD_ASSERT (! unresolved_reloc); |
419414ea | 2833 | if (r_type == R_386_TLS_GD) |
13ae64f3 | 2834 | { |
142411ca | 2835 | unsigned int type; |
13ae64f3 JJ |
2836 | bfd_vma roff; |
2837 | ||
2838 | /* GD->LE transition. */ | |
6eaa7fb5 | 2839 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
2840 | if (type == 0x04) |
2841 | { | |
6eaa7fb5 L |
2842 | /* Change |
2843 | leal foo@tlsgd(,%ebx,1), %eax | |
2844 | call ___tls_get_addr@PLT | |
2845 | into: | |
2846 | movl %gs:0, %eax | |
2847 | subl $foo@tpoff, %eax | |
13ae64f3 | 2848 | (6 byte form of subl). */ |
142411ca | 2849 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
2850 | } |
2851 | else | |
2852 | { | |
6eaa7fb5 L |
2853 | /* Change |
2854 | leal foo@tlsgd(%ebx), %eax | |
2855 | call ___tls_get_addr@PLT | |
2856 | nop | |
2857 | or | |
2858 | leal foo@tlsgd(%reg), %eax | |
2859 | call *___tls_get_addr@GOT(%reg) | |
2860 | which may be converted to | |
2861 | addr32 call ___tls_get_addr | |
2862 | into: | |
2863 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 2864 | (6 byte form of subl). */ |
142411ca | 2865 | roff = rel->r_offset + 6; |
13ae64f3 | 2866 | } |
6eaa7fb5 L |
2867 | memcpy (contents + roff - 8, |
2868 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 2869 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 2870 | contents + roff); |
6eaa7fb5 | 2871 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 2872 | rel++; |
60f2e42e | 2873 | wrel++; |
13ae64f3 JJ |
2874 | continue; |
2875 | } | |
419414ea | 2876 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
2877 | { |
2878 | /* GDesc -> LE transition. | |
2879 | It's originally something like: | |
2880 | leal x@tlsdesc(%ebx), %eax | |
2881 | ||
2882 | leal x@ntpoff, %eax | |
2883 | ||
2884 | Registers other than %eax may be set up here. */ | |
2885 | ||
142411ca | 2886 | unsigned int val; |
67a4f2b7 AO |
2887 | bfd_vma roff; |
2888 | ||
67a4f2b7 | 2889 | roff = rel->r_offset; |
67a4f2b7 | 2890 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
2891 | |
2892 | /* Now modify the instruction as appropriate. */ | |
2893 | /* aoliva FIXME: remove the above and xor the byte | |
2894 | below with 0x86. */ | |
2895 | bfd_put_8 (output_bfd, val ^ 0x86, | |
2896 | contents + roff - 1); | |
eb4ff4d6 | 2897 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
2898 | contents + roff); |
2899 | continue; | |
2900 | } | |
419414ea | 2901 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
2902 | { |
2903 | /* GDesc -> LE transition. | |
2904 | It's originally: | |
2905 | call *(%eax) | |
2906 | Turn it into: | |
142411ca | 2907 | xchg %ax,%ax */ |
67a4f2b7 | 2908 | |
67a4f2b7 | 2909 | bfd_vma roff; |
6bbec505 | 2910 | |
67a4f2b7 | 2911 | roff = rel->r_offset; |
10efb593 | 2912 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
2913 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2914 | continue; | |
2915 | } | |
419414ea | 2916 | else if (r_type == R_386_TLS_IE) |
13ae64f3 | 2917 | { |
142411ca | 2918 | unsigned int val; |
13ae64f3 JJ |
2919 | |
2920 | /* IE->LE transition: | |
37e55690 JJ |
2921 | Originally it can be one of: |
2922 | movl foo, %eax | |
2923 | movl foo, %reg | |
2924 | addl foo, %reg | |
2925 | We change it into: | |
2926 | movl $foo, %eax | |
2927 | movl $foo, %reg | |
2928 | addl $foo, %reg. */ | |
37e55690 | 2929 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
2930 | if (val == 0xa1) |
2931 | { | |
2932 | /* movl foo, %eax. */ | |
55fd94b0 AM |
2933 | bfd_put_8 (output_bfd, 0xb8, |
2934 | contents + rel->r_offset - 1); | |
37e55690 | 2935 | } |
299bf759 | 2936 | else |
37e55690 | 2937 | { |
142411ca L |
2938 | unsigned int type; |
2939 | ||
55fd94b0 AM |
2940 | type = bfd_get_8 (input_bfd, |
2941 | contents + rel->r_offset - 2); | |
299bf759 | 2942 | switch (type) |
26e41594 | 2943 | { |
299bf759 L |
2944 | case 0x8b: |
2945 | /* movl */ | |
299bf759 L |
2946 | bfd_put_8 (output_bfd, 0xc7, |
2947 | contents + rel->r_offset - 2); | |
2948 | bfd_put_8 (output_bfd, | |
2949 | 0xc0 | ((val >> 3) & 7), | |
2950 | contents + rel->r_offset - 1); | |
2951 | break; | |
2952 | case 0x03: | |
2953 | /* addl */ | |
299bf759 L |
2954 | bfd_put_8 (output_bfd, 0x81, |
2955 | contents + rel->r_offset - 2); | |
2956 | bfd_put_8 (output_bfd, | |
2957 | 0xc0 | ((val >> 3) & 7), | |
2958 | contents + rel->r_offset - 1); | |
2959 | break; | |
2960 | default: | |
2961 | BFD_FAIL (); | |
2962 | break; | |
26e41594 | 2963 | } |
37e55690 | 2964 | } |
eb4ff4d6 | 2965 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
2966 | contents + rel->r_offset); |
2967 | continue; | |
2968 | } | |
2969 | else | |
2970 | { | |
2971 | unsigned int val, type; | |
2972 | ||
2973 | /* {IE_32,GOTIE}->LE transition: | |
2974 | Originally it can be one of: | |
13ae64f3 | 2975 | subl foo(%reg1), %reg2 |
13ae64f3 | 2976 | movl foo(%reg1), %reg2 |
37e55690 | 2977 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
2978 | We change it into: |
2979 | subl $foo, %reg2 | |
37e55690 JJ |
2980 | movl $foo, %reg2 (6 byte form) |
2981 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
2982 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
2983 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
2984 | if (type == 0x8b) |
2985 | { | |
2986 | /* movl */ | |
13ae64f3 JJ |
2987 | bfd_put_8 (output_bfd, 0xc7, |
2988 | contents + rel->r_offset - 2); | |
2989 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2990 | contents + rel->r_offset - 1); | |
2991 | } | |
2992 | else if (type == 0x2b) | |
2993 | { | |
2994 | /* subl */ | |
13ae64f3 JJ |
2995 | bfd_put_8 (output_bfd, 0x81, |
2996 | contents + rel->r_offset - 2); | |
2997 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
2998 | contents + rel->r_offset - 1); | |
2999 | } | |
37e55690 JJ |
3000 | else if (type == 0x03) |
3001 | { | |
3002 | /* addl */ | |
3003 | bfd_put_8 (output_bfd, 0x81, | |
3004 | contents + rel->r_offset - 2); | |
3005 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3006 | contents + rel->r_offset - 1); | |
3007 | } | |
13ae64f3 JJ |
3008 | else |
3009 | BFD_FAIL (); | |
419414ea | 3010 | if (r_type == R_386_TLS_GOTIE) |
eb4ff4d6 | 3011 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3012 | contents + rel->r_offset); |
3013 | else | |
eb4ff4d6 | 3014 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 3015 | contents + rel->r_offset); |
13ae64f3 JJ |
3016 | continue; |
3017 | } | |
3018 | } | |
3019 | ||
6de2ae4a | 3020 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3021 | abort (); |
3022 | ||
3023 | if (h != NULL) | |
67a4f2b7 AO |
3024 | { |
3025 | off = h->got.offset; | |
0afcef53 | 3026 | offplt = elf_x86_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3027 | } |
13ae64f3 JJ |
3028 | else |
3029 | { | |
3030 | if (local_got_offsets == NULL) | |
3031 | abort (); | |
3032 | ||
3033 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3034 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3035 | } |
3036 | ||
3037 | if ((off & 1) != 0) | |
3038 | off &= ~1; | |
26e41594 | 3039 | else |
13ae64f3 | 3040 | { |
947216bf | 3041 | Elf_Internal_Rela outrel; |
91d6fa6a | 3042 | int dr_type; |
67a4f2b7 | 3043 | asection *sreloc; |
13ae64f3 | 3044 | |
6de2ae4a | 3045 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3046 | abort (); |
3047 | ||
67a4f2b7 AO |
3048 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3049 | ||
3050 | if (GOT_TLS_GDESC_P (tls_type)) | |
3051 | { | |
59d6ffb2 | 3052 | bfd_byte *loc; |
67a4f2b7 AO |
3053 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
3054 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
3055 | <= htab->elf.sgotplt->size); |
3056 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3057 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3058 | + offplt |
3059 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3060 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3061 | loc = sreloc->contents; |
765e526c | 3062 | loc += (htab->next_tls_desc_index++ |
5ae0bfb6 | 3063 | * sizeof (Elf32_External_Rel)); |
67a4f2b7 | 3064 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 3065 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
3066 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3067 | if (indx == 0) | |
3068 | { | |
3069 | BFD_ASSERT (! unresolved_reloc); | |
3070 | bfd_put_32 (output_bfd, | |
0afcef53 | 3071 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3072 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3073 | + htab->sgotplt_jump_table_size + 4); |
3074 | } | |
3075 | else | |
3076 | { | |
3077 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3078 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
3079 | + htab->sgotplt_jump_table_size + 4); |
3080 | } | |
3081 | } | |
3082 | ||
6de2ae4a | 3083 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3084 | |
6de2ae4a L |
3085 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3086 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 3087 | |
67a4f2b7 | 3088 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 3089 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
3090 | else if (GOT_TLS_GDESC_P (tls_type)) |
3091 | goto dr_done; | |
37e55690 JJ |
3092 | else if (tls_type == GOT_TLS_IE_POS) |
3093 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
3094 | else |
3095 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 3096 | |
37e55690 | 3097 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 | 3098 | bfd_put_32 (output_bfd, |
0afcef53 | 3099 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3100 | htab->elf.sgot->contents + off); |
37e55690 | 3101 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 3102 | bfd_put_32 (output_bfd, |
0afcef53 | 3103 | _bfd_x86_elf_dtpoff_base (info) - relocation, |
6de2ae4a | 3104 | htab->elf.sgot->contents + off); |
67a4f2b7 | 3105 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 3106 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3107 | htab->elf.sgot->contents + off); |
13ae64f3 | 3108 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 3109 | |
59d6ffb2 | 3110 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 3111 | |
67a4f2b7 | 3112 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3113 | { |
3114 | if (indx == 0) | |
3115 | { | |
07d6d2b8 | 3116 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 3117 | bfd_put_32 (output_bfd, |
0afcef53 | 3118 | relocation - _bfd_x86_elf_dtpoff_base (info), |
6de2ae4a | 3119 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3120 | } |
3121 | else | |
3122 | { | |
3123 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3124 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
3125 | outrel.r_info = ELF32_R_INFO (indx, |
3126 | R_386_TLS_DTPOFF32); | |
3127 | outrel.r_offset += 4; | |
59d6ffb2 | 3128 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
3129 | } |
3130 | } | |
37e55690 JJ |
3131 | else if (tls_type == GOT_TLS_IE_BOTH) |
3132 | { | |
3133 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 3134 | (indx == 0 |
0afcef53 | 3135 | ? relocation - _bfd_x86_elf_dtpoff_base (info) |
eb4ff4d6 | 3136 | : 0), |
6de2ae4a | 3137 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
3138 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
3139 | outrel.r_offset += 4; | |
59d6ffb2 | 3140 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 3141 | } |
13ae64f3 | 3142 | |
67a4f2b7 | 3143 | dr_done: |
13ae64f3 JJ |
3144 | if (h != NULL) |
3145 | h->got.offset |= 1; | |
3146 | else | |
3147 | local_got_offsets[r_symndx] |= 1; | |
3148 | } | |
3149 | ||
67a4f2b7 AO |
3150 | if (off >= (bfd_vma) -2 |
3151 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3152 | abort (); |
419414ea L |
3153 | if (r_type_tls == R_386_TLS_GOTDESC |
3154 | || r_type_tls == R_386_TLS_DESC_CALL) | |
67a4f2b7 AO |
3155 | { |
3156 | relocation = htab->sgotplt_jump_table_size + offplt; | |
3157 | unresolved_reloc = FALSE; | |
3158 | } | |
419414ea | 3159 | else if (r_type_tls == r_type) |
13ae64f3 | 3160 | { |
6de2ae4a L |
3161 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
3162 | + htab->elf.sgotplt->output_offset; | |
3163 | relocation = htab->elf.sgot->output_section->vma | |
3164 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
3165 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3166 | && tls_type == GOT_TLS_IE_BOTH) | |
3167 | relocation += 4; | |
3168 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3169 | relocation += g_o_t; |
b34976b6 | 3170 | unresolved_reloc = FALSE; |
13ae64f3 | 3171 | } |
419414ea | 3172 | else if (r_type == R_386_TLS_GD) |
13ae64f3 JJ |
3173 | { |
3174 | unsigned int val, type; | |
3175 | bfd_vma roff; | |
3176 | ||
3177 | /* GD->IE transition. */ | |
6eaa7fb5 L |
3178 | type = *(contents + rel->r_offset - 2); |
3179 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3180 | if (type == 0x04) |
3181 | { | |
6eaa7fb5 L |
3182 | /* Change |
3183 | leal foo@tlsgd(,%ebx,1), %eax | |
3184 | call ___tls_get_addr@PLT | |
3185 | into: | |
3186 | movl %gs:0, %eax | |
3187 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 3188 | val >>= 3; |
142411ca | 3189 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
3190 | } |
3191 | else | |
3192 | { | |
6eaa7fb5 L |
3193 | /* Change |
3194 | leal foo@tlsgd(%ebx), %eax | |
3195 | call ___tls_get_addr@PLT | |
3196 | nop | |
3197 | or | |
3198 | leal foo@tlsgd(%reg), %eax | |
3199 | call *___tls_get_addr@GOT(%reg) | |
3200 | which may be converted to | |
3201 | addr32 call ___tls_get_addr | |
3202 | into: | |
3203 | movl %gs:0, %eax; | |
3204 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
3205 | roff = rel->r_offset - 2; |
3206 | } | |
3207 | memcpy (contents + roff, | |
3208 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3209 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3210 | /* If foo is used only with foo@gotntpoff(%reg) and |
3211 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3212 | subl $foo@gottpoff(%reg), %eax | |
3213 | into: | |
3214 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3215 | if (tls_type == GOT_TLS_IE_POS) |
3216 | contents[roff + 6] = 0x03; | |
8c37241b | 3217 | bfd_put_32 (output_bfd, |
6de2ae4a L |
3218 | htab->elf.sgot->output_section->vma |
3219 | + htab->elf.sgot->output_offset + off | |
3220 | - htab->elf.sgotplt->output_section->vma | |
3221 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 3222 | contents + roff + 8); |
6eaa7fb5 | 3223 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 3224 | rel++; |
60f2e42e | 3225 | wrel++; |
13ae64f3 JJ |
3226 | continue; |
3227 | } | |
419414ea | 3228 | else if (r_type == R_386_TLS_GOTDESC) |
67a4f2b7 AO |
3229 | { |
3230 | /* GDesc -> IE transition. | |
3231 | It's originally something like: | |
3232 | leal x@tlsdesc(%ebx), %eax | |
3233 | ||
3234 | Change it to: | |
142411ca | 3235 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
3236 | or: |
3237 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3238 | ||
3239 | Registers other than %eax may be set up here. */ | |
3240 | ||
67a4f2b7 AO |
3241 | bfd_vma roff; |
3242 | ||
3243 | /* First, make sure it's a leal adding ebx to a 32-bit | |
3244 | offset into any register, although it's probably | |
3245 | almost always going to be eax. */ | |
3246 | roff = rel->r_offset; | |
67a4f2b7 AO |
3247 | |
3248 | /* Now modify the instruction as appropriate. */ | |
3249 | /* To turn a leal into a movl in the form we use it, it | |
3250 | suffices to change the first byte from 0x8d to 0x8b. | |
3251 | aoliva FIXME: should we decide to keep the leal, all | |
3252 | we have to do is remove the statement below, and | |
3253 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
3254 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3255 | ||
3256 | if (tls_type == GOT_TLS_IE_BOTH) | |
3257 | off += 4; | |
3258 | ||
3259 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3260 | htab->elf.sgot->output_section->vma |
3261 | + htab->elf.sgot->output_offset + off | |
3262 | - htab->elf.sgotplt->output_section->vma | |
3263 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
3264 | contents + roff); |
3265 | continue; | |
3266 | } | |
419414ea | 3267 | else if (r_type == R_386_TLS_DESC_CALL) |
67a4f2b7 AO |
3268 | { |
3269 | /* GDesc -> IE transition. | |
3270 | It's originally: | |
3271 | call *(%eax) | |
3272 | ||
3273 | Change it to: | |
142411ca | 3274 | xchg %ax,%ax |
67a4f2b7 AO |
3275 | or |
3276 | negl %eax | |
3277 | depending on how we transformed the TLS_GOTDESC above. | |
3278 | */ | |
3279 | ||
67a4f2b7 AO |
3280 | bfd_vma roff; |
3281 | ||
67a4f2b7 | 3282 | roff = rel->r_offset; |
67a4f2b7 AO |
3283 | |
3284 | /* Now modify the instruction as appropriate. */ | |
3285 | if (tls_type != GOT_TLS_IE_NEG) | |
3286 | { | |
10efb593 L |
3287 | /* xchg %ax,%ax */ |
3288 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
3289 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3290 | } | |
3291 | else | |
3292 | { | |
3293 | /* negl %eax */ | |
3294 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
3295 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
3296 | } | |
3297 | ||
3298 | continue; | |
3299 | } | |
3300 | else | |
3301 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
3302 | break; |
3303 | ||
3304 | case R_386_TLS_LDM: | |
142411ca L |
3305 | if (! elf_i386_tls_transition (info, input_bfd, |
3306 | input_section, contents, | |
3307 | symtab_hdr, sym_hashes, | |
3308 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 3309 | relend, h, r_symndx, TRUE)) |
142411ca | 3310 | return FALSE; |
13ae64f3 | 3311 | |
142411ca L |
3312 | if (r_type != R_386_TLS_LDM) |
3313 | { | |
6eaa7fb5 L |
3314 | /* LD->LE transition. Change |
3315 | leal foo@tlsldm(%ebx) %eax | |
3316 | call ___tls_get_addr@PLT | |
3317 | into: | |
3318 | movl %gs:0, %eax | |
3319 | nop | |
3320 | leal 0(%esi,1), %esi | |
3321 | or change | |
3322 | leal foo@tlsldm(%reg) %eax | |
3323 | call *___tls_get_addr@GOT(%reg) | |
3324 | which may be converted to | |
3325 | addr32 call ___tls_get_addr | |
3326 | into: | |
3327 | movl %gs:0, %eax | |
3328 | leal 0(%esi), %esi */ | |
142411ca | 3329 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
3330 | if (*(contents + rel->r_offset + 4) == 0xff |
3331 | || *(contents + rel->r_offset + 4) == 0x67) | |
3332 | memcpy (contents + rel->r_offset - 2, | |
3333 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
3334 | else | |
3335 | memcpy (contents + rel->r_offset - 2, | |
3336 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 3337 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 3338 | rel++; |
60f2e42e | 3339 | wrel++; |
13ae64f3 JJ |
3340 | continue; |
3341 | } | |
3342 | ||
6de2ae4a | 3343 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3344 | abort (); |
3345 | ||
0afcef53 | 3346 | off = htab->tls_ld_or_ldm_got.offset; |
13ae64f3 JJ |
3347 | if (off & 1) |
3348 | off &= ~1; | |
3349 | else | |
3350 | { | |
947216bf | 3351 | Elf_Internal_Rela outrel; |
13ae64f3 | 3352 | |
6de2ae4a | 3353 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3354 | abort (); |
3355 | ||
6de2ae4a L |
3356 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3357 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
3358 | |
3359 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 3360 | htab->elf.sgot->contents + off); |
13ae64f3 | 3361 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 3362 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 3363 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 3364 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
0afcef53 | 3365 | htab->tls_ld_or_ldm_got.offset |= 1; |
13ae64f3 | 3366 | } |
6de2ae4a L |
3367 | relocation = htab->elf.sgot->output_section->vma |
3368 | + htab->elf.sgot->output_offset + off | |
3369 | - htab->elf.sgotplt->output_section->vma | |
3370 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 3371 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
3372 | break; |
3373 | ||
3374 | case R_386_TLS_LDO_32: | |
0e1862bb L |
3375 | if (!bfd_link_executable (info) |
3376 | || (input_section->flags & SEC_CODE) == 0) | |
0afcef53 | 3377 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
13ae64f3 JJ |
3378 | else |
3379 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 3380 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3381 | break; |
3382 | ||
3383 | case R_386_TLS_LE_32: | |
13ae64f3 | 3384 | case R_386_TLS_LE: |
0e1862bb | 3385 | if (!bfd_link_executable (info)) |
37e55690 | 3386 | { |
947216bf | 3387 | Elf_Internal_Rela outrel; |
37e55690 | 3388 | asection *sreloc; |
37e55690 JJ |
3389 | |
3390 | outrel.r_offset = rel->r_offset | |
3391 | + input_section->output_section->vma | |
3392 | + input_section->output_offset; | |
3393 | if (h != NULL && h->dynindx != -1) | |
3394 | indx = h->dynindx; | |
3395 | else | |
3396 | indx = 0; | |
3397 | if (r_type == R_386_TLS_LE_32) | |
3398 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
3399 | else | |
3400 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3401 | sreloc = elf_section_data (input_section)->sreloc; | |
3402 | if (sreloc == NULL) | |
3403 | abort (); | |
59d6ffb2 | 3404 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3405 | if (indx) |
3406 | continue; | |
3407 | else if (r_type == R_386_TLS_LE_32) | |
0afcef53 | 3408 | relocation = _bfd_x86_elf_dtpoff_base (info) - relocation; |
37e55690 | 3409 | else |
0afcef53 | 3410 | relocation -= _bfd_x86_elf_dtpoff_base (info); |
37e55690 JJ |
3411 | } |
3412 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 3413 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 3414 | else |
eb4ff4d6 | 3415 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
3416 | break; |
3417 | ||
252b5132 RH |
3418 | default: |
3419 | break; | |
3420 | } | |
3421 | ||
239e1f3a AM |
3422 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3423 | because such sections are not SEC_ALLOC and thus ld.so will | |
3424 | not process them. */ | |
8c694914 | 3425 | if (unresolved_reloc |
239e1f3a | 3426 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
3427 | && h->def_dynamic) |
3428 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
3429 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 3430 | { |
4eca0228 | 3431 | _bfd_error_handler |
695344c0 | 3432 | /* xgettext:c-format */ |
d42c267e | 3433 | (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3434 | input_bfd, |
3435 | input_section, | |
d42c267e | 3436 | rel->r_offset, |
843fe662 | 3437 | howto->name, |
6a30718d | 3438 | h->root.root.string); |
b34976b6 | 3439 | return FALSE; |
6a30718d | 3440 | } |
83be169b | 3441 | |
cbe950e9 | 3442 | do_relocation: |
252b5132 RH |
3443 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
3444 | contents, rel->r_offset, | |
55fd94b0 | 3445 | relocation, 0); |
252b5132 | 3446 | |
62d78908 | 3447 | check_relocation_error: |
cf5c0c5b | 3448 | if (r != bfd_reloc_ok) |
252b5132 | 3449 | { |
cf5c0c5b | 3450 | const char *name; |
ffb2e45b | 3451 | |
cf5c0c5b AM |
3452 | if (h != NULL) |
3453 | name = h->root.root.string; | |
3454 | else | |
3455 | { | |
3456 | name = bfd_elf_string_from_elf_section (input_bfd, | |
3457 | symtab_hdr->sh_link, | |
3458 | sym->st_name); | |
3459 | if (name == NULL) | |
b34976b6 | 3460 | return FALSE; |
cf5c0c5b AM |
3461 | if (*name == '\0') |
3462 | name = bfd_section_name (input_bfd, sec); | |
3463 | } | |
ffb2e45b | 3464 | |
cf5c0c5b | 3465 | if (r == bfd_reloc_overflow) |
1a72702b AM |
3466 | (*info->callbacks->reloc_overflow) |
3467 | (info, (h ? &h->root : NULL), name, howto->name, | |
3468 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
3469 | else |
3470 | { | |
4eca0228 | 3471 | _bfd_error_handler |
695344c0 | 3472 | /* xgettext:c-format */ |
d42c267e | 3473 | (_("%B(%A+%#Lx): reloc against `%s': error %d"), |
d003868e | 3474 | input_bfd, input_section, |
d42c267e | 3475 | rel->r_offset, name, (int) r); |
b34976b6 | 3476 | return FALSE; |
cf5c0c5b | 3477 | } |
252b5132 | 3478 | } |
60f2e42e L |
3479 | |
3480 | if (wrel != rel) | |
3481 | *wrel = *rel; | |
3482 | } | |
3483 | ||
3484 | if (wrel != rel) | |
3485 | { | |
3486 | Elf_Internal_Shdr *rel_hdr; | |
3487 | size_t deleted = rel - wrel; | |
3488 | ||
3489 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
3490 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3491 | if (rel_hdr->sh_size == 0) | |
3492 | { | |
3493 | /* It is too late to remove an empty reloc section. Leave | |
3494 | one NONE reloc. | |
3495 | ??? What is wrong with an empty section??? */ | |
3496 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
3497 | deleted -= 1; | |
3498 | } | |
3499 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
3500 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
3501 | input_section->reloc_count -= deleted; | |
252b5132 RH |
3502 | } |
3503 | ||
b34976b6 | 3504 | return TRUE; |
252b5132 RH |
3505 | } |
3506 | ||
3507 | /* Finish up dynamic symbol handling. We set the contents of various | |
3508 | dynamic sections here. */ | |
3509 | ||
b34976b6 | 3510 | static bfd_boolean |
55fd94b0 AM |
3511 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
3512 | struct bfd_link_info *info, | |
3513 | struct elf_link_hash_entry *h, | |
3514 | Elf_Internal_Sym *sym) | |
252b5132 | 3515 | { |
0afcef53 | 3516 | struct elf_x86_link_hash_table *htab; |
25e762b9 | 3517 | unsigned plt_entry_size; |
0afcef53 | 3518 | struct elf_x86_link_hash_entry *eh; |
aec6b87e | 3519 | bfd_boolean local_undefweak; |
ee2fdd6f | 3520 | bfd_boolean use_plt_second; |
252b5132 | 3521 | |
0afcef53 | 3522 | htab = elf_x86_hash_table (info, I386_ELF_DATA); |
4dfe6ac6 NC |
3523 | if (htab == NULL) |
3524 | return FALSE; | |
252b5132 | 3525 | |
765e526c | 3526 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3527 | |
ee2fdd6f L |
3528 | /* Use the second PLT section only if there is .plt section. */ |
3529 | use_plt_second = htab->elf.splt != NULL && htab->plt_second != NULL; | |
3530 | ||
0afcef53 | 3531 | eh = (struct elf_x86_link_hash_entry *) h; |
e133d005 L |
3532 | if (eh->no_finish_dynamic_symbol) |
3533 | abort (); | |
dd7e64d4 | 3534 | |
aec6b87e L |
3535 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
3536 | resolved undefined weak symbols in executable so that their | |
3537 | references have value 0 at run-time. */ | |
c5bce5c6 | 3538 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
aec6b87e | 3539 | |
252b5132 RH |
3540 | if (h->plt.offset != (bfd_vma) -1) |
3541 | { | |
ee2fdd6f | 3542 | bfd_vma plt_index, plt_offset; |
252b5132 | 3543 | bfd_vma got_offset; |
947216bf AM |
3544 | Elf_Internal_Rela rel; |
3545 | bfd_byte *loc; | |
ee2fdd6f | 3546 | asection *plt, *resolved_plt, *gotplt, *relplt; |
cbe950e9 L |
3547 | |
3548 | /* When building a static executable, use .iplt, .igot.plt and | |
3549 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3550 | if (htab->elf.splt != NULL) |
cbe950e9 | 3551 | { |
6de2ae4a L |
3552 | plt = htab->elf.splt; |
3553 | gotplt = htab->elf.sgotplt; | |
3554 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3555 | } |
3556 | else | |
3557 | { | |
6de2ae4a L |
3558 | plt = htab->elf.iplt; |
3559 | gotplt = htab->elf.igotplt; | |
3560 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3561 | } |
252b5132 | 3562 | |
f3180fa9 | 3563 | VERIFY_PLT_ENTRY (info, h, plt, gotplt, relplt, local_undefweak) |
252b5132 RH |
3564 | |
3565 | /* Get the index in the procedure linkage table which | |
3566 | corresponds to this symbol. This is the index of this symbol | |
3567 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3568 | first entry in the procedure linkage table is reserved. |
252b5132 | 3569 | |
cbe950e9 | 3570 | Get the offset into the .got table of the entry that |
252b5132 | 3571 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 3572 | The first three are reserved. |
6bbec505 | 3573 | |
cbe950e9 L |
3574 | For static executables, we don't reserve anything. */ |
3575 | ||
6de2ae4a | 3576 | if (plt == htab->elf.splt) |
cbe950e9 | 3577 | { |
f604c2a2 | 3578 | got_offset = (h->plt.offset / plt_entry_size |
765e526c | 3579 | - htab->plt.has_plt0); |
e1f98742 | 3580 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
3581 | } |
3582 | else | |
3583 | { | |
e1f98742 L |
3584 | got_offset = h->plt.offset / plt_entry_size; |
3585 | got_offset = got_offset * 4; | |
cbe950e9 | 3586 | } |
252b5132 | 3587 | |
f604c2a2 L |
3588 | /* Fill in the entry in the procedure linkage table and update |
3589 | the first slot. */ | |
765e526c | 3590 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, |
f604c2a2 | 3591 | plt_entry_size); |
ee2fdd6f L |
3592 | |
3593 | if (use_plt_second) | |
3594 | { | |
3595 | const bfd_byte *plt_entry; | |
3596 | if (bfd_link_pic (info)) | |
765e526c | 3597 | plt_entry = htab->non_lazy_plt->pic_plt_entry; |
ee2fdd6f | 3598 | else |
765e526c | 3599 | plt_entry = htab->non_lazy_plt->plt_entry; |
ee2fdd6f | 3600 | memcpy (htab->plt_second->contents + eh->plt_second.offset, |
765e526c | 3601 | plt_entry, htab->non_lazy_plt->plt_entry_size); |
ee2fdd6f L |
3602 | |
3603 | resolved_plt = htab->plt_second; | |
3604 | plt_offset = eh->plt_second.offset; | |
3605 | } | |
3606 | else | |
3607 | { | |
3608 | resolved_plt = plt; | |
3609 | plt_offset = h->plt.offset; | |
3610 | } | |
3611 | ||
0e1862bb | 3612 | if (! bfd_link_pic (info)) |
252b5132 | 3613 | { |
252b5132 | 3614 | bfd_put_32 (output_bfd, |
cbe950e9 L |
3615 | (gotplt->output_section->vma |
3616 | + gotplt->output_offset | |
252b5132 | 3617 | + got_offset), |
ee2fdd6f | 3618 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3619 | + htab->plt.plt_got_offset); |
eac338cf | 3620 | |
851b6fa1 | 3621 | if (htab->target_os == is_vxworks) |
eac338cf PB |
3622 | { |
3623 | int s, k, reloc_index; | |
3624 | ||
3625 | /* Create the R_386_32 relocation referencing the GOT | |
3626 | for this PLT entry. */ | |
3627 | ||
3628 | /* S: Current slot number (zero-based). */ | |
765e526c | 3629 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
07d6d2b8 | 3630 | / htab->plt.plt_entry_size); |
eac338cf | 3631 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 3632 | if (bfd_link_pic (info)) |
eac338cf PB |
3633 | k = PLTRESOLVE_RELOCS_SHLIB; |
3634 | else | |
3635 | k = PLTRESOLVE_RELOCS; | |
3636 | /* Skip the PLTresolve relocations, and the relocations for | |
3637 | the other PLT slots. */ | |
3638 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
765e526c | 3639 | loc = (htab->srelplt2->contents + reloc_index |
eac338cf PB |
3640 | * sizeof (Elf32_External_Rel)); |
3641 | ||
ee2fdd6f L |
3642 | rel.r_offset = (plt->output_section->vma |
3643 | + plt->output_offset | |
eac338cf | 3644 | + h->plt.offset + 2), |
7325306f | 3645 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3646 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
3647 | ||
3648 | /* Create the R_386_32 relocation referencing the beginning of | |
3649 | the PLT for this GOT entry. */ | |
6de2ae4a L |
3650 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
3651 | + htab->elf.sgotplt->output_offset | |
eac338cf | 3652 | + got_offset); |
7325306f | 3653 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 3654 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 3655 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 3656 | } |
252b5132 RH |
3657 | } |
3658 | else | |
3659 | { | |
252b5132 | 3660 | bfd_put_32 (output_bfd, got_offset, |
ee2fdd6f | 3661 | resolved_plt->contents + plt_offset |
07d6d2b8 | 3662 | + htab->plt.plt_got_offset); |
252b5132 RH |
3663 | } |
3664 | ||
aec6b87e L |
3665 | /* Fill in the entry in the global offset table. Leave the entry |
3666 | as zero for undefined weak symbol in PIE. No PLT relocation | |
3667 | against undefined weak symbol in PIE. */ | |
3668 | if (!local_undefweak) | |
cbe950e9 | 3669 | { |
765e526c | 3670 | if (htab->plt.has_plt0) |
f604c2a2 L |
3671 | bfd_put_32 (output_bfd, |
3672 | (plt->output_section->vma | |
3673 | + plt->output_offset | |
3674 | + h->plt.offset | |
765e526c | 3675 | + htab->lazy_plt->plt_lazy_offset), |
f604c2a2 | 3676 | gotplt->contents + got_offset); |
252b5132 | 3677 | |
aec6b87e L |
3678 | /* Fill in the entry in the .rel.plt section. */ |
3679 | rel.r_offset = (gotplt->output_section->vma | |
3680 | + gotplt->output_offset | |
3681 | + got_offset); | |
cf1070f1 | 3682 | if (PLT_LOCAL_IFUNC_P (info, h)) |
aec6b87e | 3683 | { |
6322e5c5 L |
3684 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3685 | h->root.root.string, | |
3686 | h->root.u.def.section->owner); | |
3687 | ||
aec6b87e L |
3688 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
3689 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
3690 | in the .got.plt section. */ | |
3691 | bfd_put_32 (output_bfd, | |
3692 | (h->root.u.def.value | |
3693 | + h->root.u.def.section->output_section->vma | |
3694 | + h->root.u.def.section->output_offset), | |
3695 | gotplt->contents + got_offset); | |
3696 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3697 | /* R_386_IRELATIVE comes last. */ | |
3698 | plt_index = htab->next_irelative_index--; | |
3699 | } | |
3700 | else | |
3701 | { | |
3702 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
3703 | plt_index = htab->next_jump_slot_index++; | |
3704 | } | |
3705 | ||
3706 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
3707 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
3708 | ||
f604c2a2 L |
3709 | /* Don't fill the second and third slots in PLT entry for |
3710 | static executables nor without PLT0. */ | |
765e526c | 3711 | if (plt == htab->elf.splt && htab->plt.has_plt0) |
aec6b87e L |
3712 | { |
3713 | bfd_put_32 (output_bfd, | |
3714 | plt_index * sizeof (Elf32_External_Rel), | |
3715 | plt->contents + h->plt.offset | |
765e526c | 3716 | + htab->lazy_plt->plt_reloc_offset); |
f604c2a2 L |
3717 | bfd_put_32 (output_bfd, |
3718 | - (h->plt.offset | |
765e526c | 3719 | + htab->lazy_plt->plt_plt_offset + 4), |
f604c2a2 | 3720 | (plt->contents + h->plt.offset |
765e526c | 3721 | + htab->lazy_plt->plt_plt_offset)); |
aec6b87e | 3722 | } |
e1f98742 | 3723 | } |
dd7e64d4 L |
3724 | } |
3725 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
3726 | { | |
3727 | bfd_vma got_offset, plt_offset; | |
3728 | asection *plt, *got, *gotplt; | |
3729 | const bfd_byte *got_plt_entry; | |
3730 | ||
dd7e64d4 L |
3731 | /* Set the entry in the GOT procedure linkage table. */ |
3732 | plt = htab->plt_got; | |
3733 | got = htab->elf.sgot; | |
3734 | gotplt = htab->elf.sgotplt; | |
3735 | got_offset = h->got.offset; | |
3736 | ||
3737 | if (got_offset == (bfd_vma) -1 | |
3738 | || plt == NULL | |
3739 | || got == NULL | |
3740 | || gotplt == NULL) | |
3741 | abort (); | |
3742 | ||
3743 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 3744 | if (! bfd_link_pic (info)) |
252b5132 | 3745 | { |
765e526c | 3746 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 3747 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 3748 | } |
dd7e64d4 L |
3749 | else |
3750 | { | |
765e526c | 3751 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
3752 | got_offset += (got->output_section->vma |
3753 | + got->output_offset | |
3754 | - gotplt->output_section->vma | |
3755 | - gotplt->output_offset); | |
3756 | } | |
3757 | ||
3758 | plt_offset = eh->plt_got.offset; | |
3759 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
765e526c | 3760 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 3761 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 | 3762 | (plt->contents + plt_offset |
765e526c | 3763 | + htab->non_lazy_plt->plt_got_offset)); |
dd7e64d4 L |
3764 | } |
3765 | ||
aec6b87e L |
3766 | if (!local_undefweak |
3767 | && !h->def_regular | |
dd7e64d4 L |
3768 | && (h->plt.offset != (bfd_vma) -1 |
3769 | || eh->plt_got.offset != (bfd_vma) -1)) | |
3770 | { | |
3771 | /* Mark the symbol as undefined, rather than as defined in | |
3772 | the .plt section. Leave the value if there were any | |
3773 | relocations where pointer equality matters (this is a clue | |
3774 | for the dynamic linker, to make function pointer | |
3775 | comparisons work between an application and shared | |
3776 | library), otherwise set it to zero. If a function is only | |
3777 | called from a binary, there is no need to slow down | |
3778 | shared libraries because of that. */ | |
3779 | sym->st_shndx = SHN_UNDEF; | |
3780 | if (!h->pointer_equality_needed) | |
3781 | sym->st_value = 0; | |
252b5132 RH |
3782 | } |
3783 | ||
aec6b87e L |
3784 | /* Don't generate dynamic GOT relocation against undefined weak |
3785 | symbol in executable. */ | |
13ae64f3 | 3786 | if (h->got.offset != (bfd_vma) -1 |
0afcef53 L |
3787 | && ! GOT_TLS_GD_ANY_P (elf_x86_hash_entry(h)->tls_type) |
3788 | && (elf_x86_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 | |
aec6b87e | 3789 | && !local_undefweak) |
252b5132 | 3790 | { |
947216bf | 3791 | Elf_Internal_Rela rel; |
233cc9c1 | 3792 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
3793 | |
3794 | /* This symbol has an entry in the global offset table. Set it | |
3795 | up. */ | |
3796 | ||
6de2ae4a | 3797 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 3798 | abort (); |
252b5132 | 3799 | |
6de2ae4a L |
3800 | rel.r_offset = (htab->elf.sgot->output_section->vma |
3801 | + htab->elf.sgot->output_offset | |
dc810e39 | 3802 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 3803 | |
dd5724d5 AM |
3804 | /* If this is a static link, or it is a -Bsymbolic link and the |
3805 | symbol is defined locally or was forced to be local because | |
3806 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
3807 | The entry in the global offset table will already have been |
3808 | initialized in the relocate_section function. */ | |
710ab287 | 3809 | if (h->def_regular |
0018b0a3 L |
3810 | && h->type == STT_GNU_IFUNC) |
3811 | { | |
233cc9c1 L |
3812 | if (h->plt.offset == (bfd_vma) -1) |
3813 | { | |
3814 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
3815 | if (htab->elf.splt == NULL) | |
3816 | { | |
3817 | /* use .rel[a].iplt section to store .got relocations | |
3818 | in static executable. */ | |
3819 | relgot = htab->elf.irelplt; | |
3820 | } | |
6999821f | 3821 | if (SYMBOL_REFERENCES_LOCAL_P (info, h)) |
233cc9c1 | 3822 | { |
6322e5c5 L |
3823 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
3824 | h->root.root.string, | |
3825 | h->root.u.def.section->owner); | |
3826 | ||
233cc9c1 L |
3827 | bfd_put_32 (output_bfd, |
3828 | (h->root.u.def.value | |
3829 | + h->root.u.def.section->output_section->vma | |
3830 | + h->root.u.def.section->output_offset), | |
3831 | htab->elf.sgot->contents + h->got.offset); | |
3832 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3833 | } | |
3834 | else | |
3835 | goto do_glob_dat; | |
3836 | } | |
3837 | else if (bfd_link_pic (info)) | |
710ab287 L |
3838 | { |
3839 | /* Generate R_386_GLOB_DAT. */ | |
3840 | goto do_glob_dat; | |
3841 | } | |
3842 | else | |
3843 | { | |
cd2b2c10 | 3844 | asection *plt; |
ee2fdd6f | 3845 | bfd_vma plt_offset; |
cd2b2c10 | 3846 | |
710ab287 L |
3847 | if (!h->pointer_equality_needed) |
3848 | abort (); | |
3849 | ||
3850 | /* For non-shared object, we can't use .got.plt, which | |
3851 | contains the real function addres if we need pointer | |
3852 | equality. We load the GOT entry with the PLT entry. */ | |
ee2fdd6f L |
3853 | if (htab->plt_second != NULL) |
3854 | { | |
3855 | plt = htab->plt_second; | |
3856 | plt_offset = eh->plt_second.offset; | |
3857 | } | |
3858 | else | |
3859 | { | |
3860 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; | |
3861 | plt_offset = h->plt.offset; | |
3862 | } | |
710ab287 L |
3863 | bfd_put_32 (output_bfd, |
3864 | (plt->output_section->vma | |
ee2fdd6f | 3865 | + plt->output_offset + plt_offset), |
6de2ae4a | 3866 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
3867 | return TRUE; |
3868 | } | |
0018b0a3 | 3869 | } |
0e1862bb | 3870 | else if (bfd_link_pic (info) |
6999821f | 3871 | && SYMBOL_REFERENCES_LOCAL_P (info, h)) |
dd5724d5 | 3872 | { |
6725bdbf | 3873 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
3874 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
3875 | } | |
252b5132 RH |
3876 | else |
3877 | { | |
dd5724d5 | 3878 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 3879 | do_glob_dat: |
6725bdbf | 3880 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 3881 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
3882 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
3883 | } | |
3884 | ||
233cc9c1 | 3885 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
3886 | } |
3887 | ||
f5385ebf | 3888 | if (h->needs_copy) |
252b5132 | 3889 | { |
947216bf | 3890 | Elf_Internal_Rela rel; |
5474d94f | 3891 | asection *s; |
252b5132 RH |
3892 | |
3893 | /* This symbol needs a copy reloc. Set it up. */ | |
ff38b4cc | 3894 | VERIFY_COPY_RELOC (h, htab) |
252b5132 RH |
3895 | |
3896 | rel.r_offset = (h->root.u.def.value | |
3897 | + h->root.u.def.section->output_section->vma | |
3898 | + h->root.u.def.section->output_offset); | |
3899 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 3900 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
3901 | s = htab->elf.sreldynrelro; |
3902 | else | |
3903 | s = htab->elf.srelbss; | |
3904 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
3905 | } |
3906 | ||
b34976b6 | 3907 | return TRUE; |
252b5132 RH |
3908 | } |
3909 | ||
c25bc9fc L |
3910 | /* Finish up local dynamic symbol handling. We set the contents of |
3911 | various dynamic sections here. */ | |
3912 | ||
3913 | static bfd_boolean | |
3914 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
3915 | { | |
3916 | struct elf_link_hash_entry *h | |
3917 | = (struct elf_link_hash_entry *) *slot; | |
3918 | struct bfd_link_info *info | |
23209a78 | 3919 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
3920 | |
3921 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
3922 | h, NULL); | |
3923 | } | |
3924 | ||
aec6b87e L |
3925 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
3926 | here since undefined weak symbol may not be dynamic and may not be | |
3927 | called for elf_i386_finish_dynamic_symbol. */ | |
3928 | ||
3929 | static bfd_boolean | |
3930 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
3931 | void *inf) | |
3932 | { | |
3933 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
3934 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3935 | ||
3936 | if (h->root.type != bfd_link_hash_undefweak | |
3937 | || h->dynindx != -1) | |
3938 | return TRUE; | |
3939 | ||
3940 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5f0f0847 | 3941 | info, h, NULL); |
aec6b87e L |
3942 | } |
3943 | ||
38701953 AM |
3944 | /* Used to decide how to sort relocs in an optimal manner for the |
3945 | dynamic linker, before writing them out. */ | |
3946 | ||
3947 | static enum elf_reloc_type_class | |
cae1fbbb | 3948 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
3949 | const asection *rel_sec ATTRIBUTE_UNUSED, |
3950 | const Elf_Internal_Rela *rela) | |
38701953 | 3951 | { |
cae1fbbb L |
3952 | bfd *abfd = info->output_bfd; |
3953 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
3954 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 3955 | |
d9e3b590 L |
3956 | if (htab->dynsym != NULL |
3957 | && htab->dynsym->contents != NULL) | |
3958 | { | |
3959 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
07d6d2b8 | 3960 | dynamic symbols. */ |
d9e3b590 | 3961 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); |
c428ce9d L |
3962 | if (r_symndx != STN_UNDEF) |
3963 | { | |
3964 | Elf_Internal_Sym sym; | |
3965 | if (!bed->s->swap_symbol_in (abfd, | |
3966 | (htab->dynsym->contents | |
3967 | + r_symndx * sizeof (Elf32_External_Sym)), | |
3968 | 0, &sym)) | |
3969 | abort (); | |
d9e3b590 | 3970 | |
c428ce9d L |
3971 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
3972 | return reloc_class_ifunc; | |
3973 | } | |
d9e3b590 | 3974 | } |
cae1fbbb | 3975 | |
55fd94b0 | 3976 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 3977 | { |
c428ce9d L |
3978 | case R_386_IRELATIVE: |
3979 | return reloc_class_ifunc; | |
38701953 AM |
3980 | case R_386_RELATIVE: |
3981 | return reloc_class_relative; | |
3982 | case R_386_JUMP_SLOT: | |
3983 | return reloc_class_plt; | |
3984 | case R_386_COPY: | |
3985 | return reloc_class_copy; | |
3986 | default: | |
3987 | return reloc_class_normal; | |
3988 | } | |
3989 | } | |
3990 | ||
252b5132 RH |
3991 | /* Finish up the dynamic sections. */ |
3992 | ||
b34976b6 | 3993 | static bfd_boolean |
55fd94b0 AM |
3994 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
3995 | struct bfd_link_info *info) | |
252b5132 | 3996 | { |
0afcef53 | 3997 | struct elf_x86_link_hash_table *htab; |
252b5132 | 3998 | |
9577f60b | 3999 | htab = _bfd_x86_elf_finish_dynamic_sections (output_bfd, info); |
4dfe6ac6 NC |
4000 | if (htab == NULL) |
4001 | return FALSE; | |
4002 | ||
9577f60b L |
4003 | if (!htab->elf.dynamic_sections_created) |
4004 | return TRUE; | |
252b5132 | 4005 | |
9577f60b | 4006 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 4007 | { |
9577f60b L |
4008 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
4009 | really seem like the right value. */ | |
4010 | elf_section_data (htab->elf.splt->output_section) | |
4011 | ->this_hdr.sh_entsize = 4; | |
252b5132 | 4012 | |
9577f60b | 4013 | if (htab->plt.has_plt0) |
252b5132 | 4014 | { |
9577f60b L |
4015 | /* Fill in the special first entry in the procedure linkage |
4016 | table. */ | |
9577f60b L |
4017 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, |
4018 | htab->lazy_plt->plt0_entry_size); | |
4019 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
851b6fa1 | 4020 | htab->plt0_pad_byte, |
9577f60b L |
4021 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
4022 | if (!bfd_link_pic (info)) | |
252b5132 | 4023 | { |
9577f60b L |
4024 | bfd_put_32 (output_bfd, |
4025 | (htab->elf.sgotplt->output_section->vma | |
4026 | + htab->elf.sgotplt->output_offset | |
4027 | + 4), | |
4028 | htab->elf.splt->contents | |
4029 | + htab->lazy_plt->plt0_got1_offset); | |
4030 | bfd_put_32 (output_bfd, | |
4031 | (htab->elf.sgotplt->output_section->vma | |
4032 | + htab->elf.sgotplt->output_offset | |
4033 | + 8), | |
4034 | htab->elf.splt->contents | |
4035 | + htab->lazy_plt->plt0_got2_offset); | |
1f78f649 | 4036 | |
851b6fa1 | 4037 | if (htab->target_os == is_vxworks) |
eac338cf | 4038 | { |
9577f60b L |
4039 | Elf_Internal_Rela rel; |
4040 | int num_plts = (htab->elf.splt->size | |
4041 | / htab->plt.plt_entry_size) - 1; | |
4042 | unsigned char *p; | |
4043 | asection *srelplt2 = htab->srelplt2; | |
4044 | ||
4045 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4046 | + 4. On IA32 we use REL relocations so the | |
4047 | addend goes in the PLT directly. */ | |
4048 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4049 | + htab->elf.splt->output_offset | |
4050 | + htab->lazy_plt->plt0_got1_offset); | |
4051 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4052 | R_386_32); | |
4053 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4054 | srelplt2->contents); | |
4055 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
4056 | + 8. */ | |
4057 | rel.r_offset = (htab->elf.splt->output_section->vma | |
4058 | + htab->elf.splt->output_offset | |
4059 | + htab->lazy_plt->plt0_got2_offset); | |
4060 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
4061 | R_386_32); | |
4062 | bfd_elf32_swap_reloc_out (output_bfd, &rel, | |
4063 | srelplt2->contents + | |
4064 | sizeof (Elf32_External_Rel)); | |
4065 | /* Correct the .rel.plt.unloaded relocations. */ | |
4066 | p = srelplt2->contents; | |
4067 | if (bfd_link_pic (info)) | |
4068 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4069 | else | |
4070 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
eac338cf | 4071 | |
9577f60b | 4072 | for (; num_plts; num_plts--) |
1f78f649 | 4073 | { |
9577f60b | 4074 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
f604c2a2 | 4075 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
1f78f649 | 4076 | R_386_32); |
9577f60b L |
4077 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4078 | p += sizeof (Elf32_External_Rel); | |
f604c2a2 | 4079 | |
9577f60b L |
4080 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); |
4081 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
4082 | R_386_32); | |
4083 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
4084 | p += sizeof (Elf32_External_Rel); | |
1f78f649 | 4085 | } |
eac338cf PB |
4086 | } |
4087 | } | |
252b5132 | 4088 | } |
fff53dae L |
4089 | } |
4090 | ||
aec6b87e L |
4091 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
4092 | if (bfd_link_pie (info)) | |
4093 | bfd_hash_traverse (&info->hash->table, | |
4094 | elf_i386_pie_finish_undefweak_symbol, | |
4095 | info); | |
4096 | ||
b34976b6 | 4097 | return TRUE; |
252b5132 RH |
4098 | } |
4099 | ||
233cc9c1 L |
4100 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
4101 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
4102 | It has to be done before elf_link_sort_relocs is called so that | |
4103 | dynamic relocations are properly sorted. */ | |
4104 | ||
4105 | static bfd_boolean | |
4106 | elf_i386_output_arch_local_syms | |
4107 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
4108 | struct bfd_link_info *info, | |
4109 | void *flaginfo ATTRIBUTE_UNUSED, | |
4110 | int (*func) (void *, const char *, | |
4111 | Elf_Internal_Sym *, | |
4112 | asection *, | |
4113 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
4114 | { | |
0afcef53 L |
4115 | struct elf_x86_link_hash_table *htab |
4116 | = elf_x86_hash_table (info, I386_ELF_DATA); | |
233cc9c1 L |
4117 | if (htab == NULL) |
4118 | return FALSE; | |
4119 | ||
4120 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
4121 | htab_traverse (htab->loc_hash_table, | |
4122 | elf_i386_finish_local_dynamic_symbol, | |
4123 | info); | |
4124 | ||
4125 | return TRUE; | |
4126 | } | |
4127 | ||
f604c2a2 | 4128 | /* Forward declaration. */ |
765e526c | 4129 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt; |
f604c2a2 L |
4130 | |
4131 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
4132 | dynamic relocations. */ | |
4133 | ||
4134 | static long | |
4135 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
4136 | long symcount ATTRIBUTE_UNUSED, | |
4137 | asymbol **syms ATTRIBUTE_UNUSED, | |
4138 | long dynsymcount, | |
4139 | asymbol **dynsyms, | |
4140 | asymbol **ret) | |
4141 | { | |
f493882d | 4142 | long count, i, n; |
f604c2a2 | 4143 | int j; |
f604c2a2 | 4144 | bfd_byte *plt_contents; |
f493882d | 4145 | long relsize; |
765e526c L |
4146 | const struct elf_x86_lazy_plt_layout *lazy_plt; |
4147 | const struct elf_x86_non_lazy_plt_layout *non_lazy_plt; | |
4148 | const struct elf_x86_lazy_plt_layout *lazy_ibt_plt; | |
4149 | const struct elf_x86_non_lazy_plt_layout *non_lazy_ibt_plt; | |
f604c2a2 L |
4150 | asection *plt; |
4151 | bfd_vma got_addr; | |
f493882d L |
4152 | enum elf_x86_plt_type plt_type; |
4153 | struct elf_x86_plt plts[] = | |
3972882e | 4154 | { |
f493882d L |
4155 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0, 0 }, |
4156 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0, 0 }, | |
4157 | { ".plt.sec", NULL, NULL, plt_second, 0, 0, 0, 0 }, | |
4158 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0, 0 } | |
f604c2a2 | 4159 | }; |
144bed8d | 4160 | |
f604c2a2 | 4161 | *ret = NULL; |
144bed8d | 4162 | |
f604c2a2 L |
4163 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
4164 | return 0; | |
3972882e | 4165 | |
f604c2a2 L |
4166 | if (dynsymcount <= 0) |
4167 | return 0; | |
cca5b8b6 | 4168 | |
f604c2a2 L |
4169 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
4170 | if (relsize <= 0) | |
4171 | return -1; | |
cca5b8b6 | 4172 | |
f604c2a2 L |
4173 | non_lazy_plt = NULL; |
4174 | /* Silence GCC 6. */ | |
4175 | lazy_plt = NULL; | |
ee2fdd6f L |
4176 | non_lazy_ibt_plt = NULL; |
4177 | lazy_ibt_plt = NULL; | |
851b6fa1 | 4178 | switch (get_elf_x86_backend_data (abfd)->target_os) |
144bed8d | 4179 | { |
f604c2a2 L |
4180 | case is_normal: |
4181 | non_lazy_plt = &elf_i386_non_lazy_plt; | |
ee2fdd6f L |
4182 | lazy_ibt_plt = &elf_i386_lazy_ibt_plt; |
4183 | non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4184 | /* Fall through */ |
4185 | case is_vxworks: | |
4186 | lazy_plt = &elf_i386_lazy_plt; | |
4187 | break; | |
4188 | case is_nacl: | |
4189 | lazy_plt = &elf_i386_nacl_plt; | |
4190 | break; | |
4191 | } | |
4192 | ||
4193 | got_addr = 0; | |
3972882e | 4194 | |
f604c2a2 L |
4195 | count = 0; |
4196 | for (j = 0; plts[j].name != NULL; j++) | |
4197 | { | |
4198 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
90efb642 | 4199 | if (plt == NULL || plt->size == 0) |
6f25f223 | 4200 | continue; |
533d0af0 | 4201 | |
f604c2a2 L |
4202 | /* Get the PLT section contents. */ |
4203 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
4204 | if (plt_contents == NULL) | |
4205 | break; | |
4206 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
4207 | plt_contents, 0, plt->size)) | |
4208 | { | |
4209 | free (plt_contents); | |
4210 | break; | |
4211 | } | |
4212 | ||
4213 | /* Check what kind of PLT it is. */ | |
4214 | plt_type = plt_unknown; | |
90efb642 L |
4215 | if (plts[j].type == plt_unknown |
4216 | && (plt->size >= (lazy_plt->plt0_entry_size | |
4217 | + lazy_plt->plt_entry_size))) | |
f604c2a2 L |
4218 | { |
4219 | /* Match lazy PLT first. */ | |
4220 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
4221 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4222 | { |
4223 | /* The fist entry in the lazy IBT PLT is the same as the | |
4224 | normal lazy PLT. */ | |
4225 | if (lazy_ibt_plt != NULL | |
90efb642 | 4226 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4227 | lazy_ibt_plt->plt_entry, |
4228 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4229 | plt_type = plt_lazy | plt_second; | |
4230 | else | |
4231 | plt_type = plt_lazy; | |
4232 | } | |
f604c2a2 L |
4233 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, |
4234 | lazy_plt->plt0_got1_offset) == 0) | |
ee2fdd6f L |
4235 | { |
4236 | /* The fist entry in the PIC lazy IBT PLT is the same as | |
4237 | the normal PIC lazy PLT. */ | |
4238 | if (lazy_ibt_plt != NULL | |
90efb642 | 4239 | && (memcmp (plt_contents + lazy_ibt_plt->plt0_entry_size, |
ee2fdd6f L |
4240 | lazy_ibt_plt->pic_plt_entry, |
4241 | lazy_ibt_plt->plt_got_offset) == 0)) | |
4242 | plt_type = plt_lazy | plt_pic | plt_second; | |
4243 | else | |
4244 | plt_type = plt_lazy | plt_pic; | |
4245 | } | |
f604c2a2 L |
4246 | } |
4247 | ||
4248 | if (non_lazy_plt != NULL | |
90efb642 L |
4249 | && (plt_type == plt_unknown || plt_type == plt_non_lazy) |
4250 | && plt->size >= non_lazy_plt->plt_entry_size) | |
f604c2a2 L |
4251 | { |
4252 | /* Match non-lazy PLT. */ | |
4253 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
4254 | non_lazy_plt->plt_got_offset) == 0) | |
4255 | plt_type = plt_non_lazy; | |
4256 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
4257 | non_lazy_plt->plt_got_offset) == 0) | |
4258 | plt_type = plt_pic; | |
4259 | } | |
4260 | ||
ee2fdd6f | 4261 | if ((non_lazy_ibt_plt != NULL) |
90efb642 L |
4262 | && (plt_type == plt_unknown || plt_type == plt_second) |
4263 | && plt->size >= non_lazy_ibt_plt->plt_entry_size) | |
ee2fdd6f L |
4264 | { |
4265 | if (memcmp (plt_contents, | |
4266 | non_lazy_ibt_plt->plt_entry, | |
4267 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4268 | { | |
4269 | /* Match IBT PLT. */ | |
4270 | plt_type = plt_second; | |
4271 | non_lazy_plt = non_lazy_ibt_plt; | |
4272 | } | |
4273 | else if (memcmp (plt_contents, | |
4274 | non_lazy_ibt_plt->pic_plt_entry, | |
4275 | non_lazy_ibt_plt->plt_got_offset) == 0) | |
4276 | { | |
4277 | /* Match PIC IBT PLT. */ | |
4278 | plt_type = plt_second | plt_pic; | |
4279 | non_lazy_plt = non_lazy_ibt_plt; | |
4280 | } | |
4281 | } | |
4282 | ||
f604c2a2 | 4283 | if (plt_type == plt_unknown) |
37c0b6ee L |
4284 | { |
4285 | free (plt_contents); | |
4286 | continue; | |
4287 | } | |
3972882e | 4288 | |
f604c2a2 L |
4289 | plts[j].sec = plt; |
4290 | plts[j].type = plt_type; | |
ec1f73bb | 4291 | |
f604c2a2 L |
4292 | if ((plt_type & plt_lazy)) |
4293 | { | |
4294 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
4295 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
4296 | /* Skip PLT0 in lazy PLT. */ | |
4297 | i = 1; | |
4298 | } | |
4299 | else | |
4300 | { | |
4301 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
4302 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
4303 | i = 0; | |
4304 | } | |
fca6ae69 | 4305 | |
ee2fdd6f L |
4306 | /* Skip lazy PLT when the second PLT is used. */ |
4307 | if ((plt_type & (plt_lazy | plt_second)) | |
4308 | == (plt_lazy | plt_second)) | |
4309 | plts[j].count = 0; | |
4310 | else | |
4311 | { | |
4312 | n = plt->size / plts[j].plt_entry_size; | |
4313 | plts[j].count = n; | |
4314 | count += n - i; | |
4315 | } | |
f604c2a2 L |
4316 | |
4317 | plts[j].contents = plt_contents; | |
4318 | ||
4319 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
4320 | if ((plt_type & plt_pic)) | |
4321 | got_addr = (bfd_vma) -1; | |
144bed8d L |
4322 | } |
4323 | ||
f493882d L |
4324 | return _bfd_x86_elf_get_synthetic_symtab (abfd, count, relsize, |
4325 | got_addr, plts, dynsyms, | |
4326 | ret); | |
4c45e5c9 JJ |
4327 | } |
4328 | ||
f604c2a2 L |
4329 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
4330 | with GNU properties if found. Otherwise, return NULL. */ | |
4331 | ||
4332 | static bfd * | |
4333 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
4334 | { | |
1de031c8 | 4335 | struct elf_x86_init_table init_table; |
f604c2a2 | 4336 | |
851b6fa1 | 4337 | switch (get_elf_x86_backend_data (info->output_bfd)->target_os) |
f604c2a2 L |
4338 | { |
4339 | case is_normal: | |
851b6fa1 | 4340 | init_table.plt0_pad_byte = 0x0; |
1de031c8 L |
4341 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4342 | init_table.non_lazy_plt = &elf_i386_non_lazy_plt; | |
4343 | init_table.lazy_ibt_plt = &elf_i386_lazy_ibt_plt; | |
4344 | init_table.non_lazy_ibt_plt = &elf_i386_non_lazy_ibt_plt; | |
f604c2a2 L |
4345 | break; |
4346 | case is_vxworks: | |
851b6fa1 | 4347 | init_table.plt0_pad_byte = 0x90; |
1de031c8 L |
4348 | init_table.lazy_plt = &elf_i386_lazy_plt; |
4349 | init_table.non_lazy_plt = NULL; | |
4350 | init_table.lazy_ibt_plt = NULL; | |
4351 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 L |
4352 | break; |
4353 | case is_nacl: | |
851b6fa1 | 4354 | init_table.plt0_pad_byte = 0x90; |
1de031c8 L |
4355 | init_table.lazy_plt = &elf_i386_nacl_plt; |
4356 | init_table.non_lazy_plt = NULL; | |
4357 | init_table.lazy_ibt_plt = NULL; | |
4358 | init_table.non_lazy_ibt_plt = NULL; | |
f604c2a2 L |
4359 | break; |
4360 | } | |
4361 | ||
1de031c8 L |
4362 | init_table.r_info = elf32_r_info; |
4363 | init_table.r_sym = elf32_r_sym; | |
7a382c1c | 4364 | |
1de031c8 | 4365 | return _bfd_x86_elf_link_setup_gnu_properties (info, &init_table); |
f604c2a2 L |
4366 | } |
4367 | ||
6d00b590 | 4368 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
4369 | #define TARGET_LITTLE_NAME "elf32-i386" |
4370 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4371 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
4372 | #define ELF_MACHINE_CODE EM_386 |
4373 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
4374 | |
4375 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4376 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4377 | #define elf_backend_want_got_plt 1 |
4378 | #define elf_backend_plt_readonly 1 | |
4379 | #define elf_backend_want_plt_sym 0 | |
4380 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 4381 | #define elf_backend_plt_alignment 4 |
64f52338 | 4382 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 4383 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 4384 | #define elf_backend_caches_rawsize 1 |
5474d94f | 4385 | #define elf_backend_want_dynrelro 1 |
252b5132 | 4386 | |
8c29f035 AM |
4387 | /* Support RELA for objdump of prelink objects. */ |
4388 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
4389 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
4390 | ||
dd5724d5 | 4391 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
dd5724d5 | 4392 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 4393 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 4394 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 | 4395 | |
13285a1b | 4396 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 4397 | #define elf_backend_check_relocs elf_i386_check_relocs |
f604c2a2 | 4398 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 4399 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
4400 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
4401 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 4402 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
c5fccbec DJ |
4403 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
4404 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 4405 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca | 4406 | #define elf_backend_relocate_section elf_i386_relocate_section |
f604c2a2 | 4407 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
9f857535 | 4408 | #define elf_backend_hide_symbol _bfd_x86_elf_hide_symbol |
dd5724d5 | 4409 | |
a2f63b2e MR |
4410 | #define elf_backend_linux_prpsinfo32_ugid16 TRUE |
4411 | ||
252b5132 | 4412 | #include "elf32-target.h" |
2bc3c89a AM |
4413 | |
4414 | /* FreeBSD support. */ | |
4415 | ||
4416 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4417 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
4418 | #undef TARGET_LITTLE_NAME |
4419 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
4420 | #undef ELF_OSABI |
4421 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
4422 | |
4423 | /* The kernel recognizes executables as valid only if they carry a | |
4424 | "FreeBSD" label in the ELF header. So we put this label on all | |
4425 | executables and (for simplicity) also all other object files. */ | |
4426 | ||
2bc3c89a | 4427 | static void |
d8045f23 | 4428 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 4429 | { |
78245035 | 4430 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 4431 | |
2bc3c89a | 4432 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
4433 | { |
4434 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
4435 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
4436 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
4437 | } | |
caf47ea6 | 4438 | #endif |
2bc3c89a AM |
4439 | } |
4440 | ||
4441 | #undef elf_backend_post_process_headers | |
d8045f23 | 4442 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
4443 | #undef elf32_bed |
4444 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 4445 | |
d8045f23 NC |
4446 | #undef elf_backend_add_symbol_hook |
4447 | ||
2bc3c89a | 4448 | #include "elf32-target.h" |
eac338cf | 4449 | |
a6cc6b3b RO |
4450 | /* Solaris 2. */ |
4451 | ||
4452 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4453 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
4454 | #undef TARGET_LITTLE_NAME |
4455 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
4456 | ||
914082d1 L |
4457 | #undef elf_backend_post_process_headers |
4458 | ||
a6cc6b3b RO |
4459 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
4460 | objects won't be recognized. */ | |
4461 | #undef ELF_OSABI | |
4462 | ||
4463 | #undef elf32_bed | |
4464 | #define elf32_bed elf32_i386_sol2_bed | |
4465 | ||
7dc98aea RO |
4466 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
4467 | boundary. */ | |
84865015 | 4468 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
4469 | #define elf_backend_static_tls_alignment 8 |
4470 | ||
a6cc6b3b RO |
4471 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4472 | ||
4473 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4474 | File, p.63. */ | |
84865015 | 4475 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
4476 | #define elf_backend_want_plt_sym 1 |
4477 | ||
84865015 NC |
4478 | #undef elf_backend_strtab_flags |
4479 | #define elf_backend_strtab_flags SHF_STRINGS | |
4480 | ||
5522f910 | 4481 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
07d6d2b8 | 4482 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised |
5522f910 NC |
4483 | FALSE otherwise. ISECTION is the best guess matching section from the |
4484 | input bfd IBFD, but it might be NULL. */ | |
4485 | ||
84865015 | 4486 | static bfd_boolean |
5522f910 NC |
4487 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
4488 | bfd *obfd ATTRIBUTE_UNUSED, | |
4489 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
4490 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
4491 | { |
4492 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
4493 | and sh_link fields of Solaris specific section types. */ |
4494 | return FALSE; | |
84865015 | 4495 | |
5522f910 | 4496 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
4497 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
4498 | ||
4499 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
4500 | ||
4501 | The following values should be set: | |
07d6d2b8 AM |
4502 | |
4503 | Type Link Info | |
84865015 NC |
4504 | ----------------------------------------------------------------------------- |
4505 | SHT_SUNW_ancillary The section header index of 0 | |
07d6d2b8 AM |
4506 | [0x6fffffee] the associated string table. |
4507 | ||
84865015 | 4508 | SHT_SUNW_capinfo The section header index of For a dynamic object, the |
07d6d2b8 AM |
4509 | [0x6ffffff0] the associated symbol table. section header index of |
4510 | the associated | |
84865015 NC |
4511 | SHT_SUNW_capchain table, |
4512 | otherwise 0. | |
4513 | ||
4514 | SHT_SUNW_symsort The section header index of 0 | |
07d6d2b8 | 4515 | [0x6ffffff1] the associated symbol table. |
84865015 NC |
4516 | |
4517 | SHT_SUNW_tlssort The section header index of 0 | |
07d6d2b8 AM |
4518 | [0x6ffffff2] the associated symbol table. |
4519 | ||
4520 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
4521 | [0x6ffffff3] the associated string table. symbol table index of the | |
4522 | This index is the same string last local symbol, | |
84865015 | 4523 | table used by the SHT_DYNSYM STB_LOCAL. Since |
07d6d2b8 AM |
4524 | section. SHT_SUNW_LDYNSYM only |
4525 | contains local symbols, | |
84865015 NC |
4526 | sh_info is equivalent to |
4527 | the number of symbols in | |
4528 | the table. | |
4529 | ||
07d6d2b8 AM |
4530 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer |
4531 | [0x6ffffff5] the section header index of to named strings, the | |
4532 | the associated section header index of | |
4533 | SHT_SUNW_capinfo table, the associated string | |
4534 | otherwise 0. table, otherwise 0. | |
84865015 | 4535 | |
07d6d2b8 AM |
4536 | SHT_SUNW_move The section header index of 0 |
4537 | [0x6ffffffa] the associated symbol table. | |
4538 | ||
4539 | SHT_SUNW_COMDAT 0 0 | |
84865015 NC |
4540 | [0x6ffffffb] |
4541 | ||
4542 | SHT_SUNW_syminfo The section header index of The section header index | |
07d6d2b8 AM |
4543 | [0x6ffffffc] the associated symbol table. of the associated |
4544 | .dynamic section. | |
84865015 | 4545 | |
07d6d2b8 AM |
4546 | SHT_SUNW_verdef The section header index of The number of version |
4547 | [0x6ffffffd] the associated string table. definitions within the | |
4548 | section. | |
84865015 NC |
4549 | |
4550 | SHT_SUNW_verneed The section header index of The number of version | |
07d6d2b8 AM |
4551 | [0x6ffffffe] the associated string table. dependencies within the |
4552 | section. | |
84865015 | 4553 | |
07d6d2b8 AM |
4554 | SHT_SUNW_versym The section header index of 0 |
4555 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
4556 | } |
4557 | ||
5522f910 NC |
4558 | #undef elf_backend_copy_special_section_fields |
4559 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 4560 | |
a6cc6b3b RO |
4561 | #include "elf32-target.h" |
4562 | ||
bf64a951 L |
4563 | /* Intel MCU support. */ |
4564 | ||
4565 | static bfd_boolean | |
4566 | elf32_iamcu_elf_object_p (bfd *abfd) | |
4567 | { | |
4568 | /* Set the right machine number for an IAMCU elf32 file. */ | |
4569 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
4570 | return TRUE; | |
4571 | } | |
4572 | ||
4573 | #undef TARGET_LITTLE_SYM | |
4574 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
4575 | #undef TARGET_LITTLE_NAME | |
4576 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 4577 | #undef ELF_ARCH |
bf64a951 L |
4578 | #define ELF_ARCH bfd_arch_iamcu |
4579 | ||
4580 | #undef ELF_MACHINE_CODE | |
4581 | #define ELF_MACHINE_CODE EM_IAMCU | |
4582 | ||
4583 | #undef ELF_OSABI | |
4584 | ||
4585 | #undef elf32_bed | |
4586 | #define elf32_bed elf32_iamcu_bed | |
4587 | ||
4588 | #undef elf_backend_object_p | |
4589 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
4590 | ||
4591 | #undef elf_backend_static_tls_alignment | |
4592 | ||
4593 | #undef elf_backend_want_plt_sym | |
07d6d2b8 | 4594 | #define elf_backend_want_plt_sym 0 |
bf64a951 | 4595 | |
84865015 | 4596 | #undef elf_backend_strtab_flags |
5522f910 | 4597 | #undef elf_backend_copy_special_section_fields |
84865015 | 4598 | |
bf64a951 L |
4599 | #include "elf32-target.h" |
4600 | ||
4601 | /* Restore defaults. */ | |
4602 | #undef ELF_ARCH | |
4603 | #define ELF_ARCH bfd_arch_i386 | |
4604 | #undef ELF_MACHINE_CODE | |
4605 | #define ELF_MACHINE_CODE EM_386 | |
4606 | ||
a27e4371 RM |
4607 | /* Native Client support. */ |
4608 | ||
4609 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4610 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
4611 | #undef TARGET_LITTLE_NAME |
4612 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
4613 | #undef elf32_bed | |
4614 | #define elf32_bed elf32_i386_nacl_bed | |
4615 | ||
4616 | #undef ELF_MAXPAGESIZE | |
4617 | #define ELF_MAXPAGESIZE 0x10000 | |
4618 | ||
4619 | /* Restore defaults. */ | |
4620 | #undef ELF_OSABI | |
4621 | #undef elf_backend_want_plt_sym | |
4622 | #define elf_backend_want_plt_sym 0 | |
4623 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
4624 | #undef elf_backend_static_tls_alignment |
4625 | ||
4626 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
4627 | ||
4628 | #undef elf_backend_plt_alignment | |
4629 | #define elf_backend_plt_alignment 5 | |
4630 | #define NACL_PLT_ENTRY_SIZE 64 | |
4631 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
4632 | ||
4633 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
4634 | { | |
4635 | 0xff, 0x35, /* pushl contents of address */ | |
07d6d2b8 AM |
4636 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ |
4637 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4638 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
a27e4371 RM |
4639 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ |
4640 | 0xff, 0xe1 /* jmp *%ecx */ | |
4641 | }; | |
4642 | ||
4643 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4644 | { | |
4645 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
4646 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
4647 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
4648 | 0xff, 0xe1, /* jmp *%ecx */ | |
4649 | ||
07d6d2b8 | 4650 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4651 | 0x90, |
4652 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4653 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4654 | ||
4655 | /* Lazy GOT entries point here (32-byte aligned). */ | |
4656 | 0x68, /* pushl immediate */ | |
4657 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
4658 | 0xe9, /* jmp relative */ | |
07d6d2b8 | 4659 | 0, 0, 0, 0, /* replaced with offset to .plt. */ |
a27e4371 | 4660 | |
07d6d2b8 | 4661 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4662 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, |
4663 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4664 | 0x90, 0x90 | |
4665 | }; | |
4666 | ||
4667 | static const bfd_byte | |
4668 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
4669 | { | |
4670 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
4671 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
4672 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
4673 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
4674 | |
4675 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
4676 | so pad to that size with nop instructions. */ | |
4677 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
4678 | }; |
4679 | ||
4680 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
4681 | { | |
07d6d2b8 AM |
4682 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ |
4683 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
4684 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
4685 | 0xff, 0xe1, /* jmp *%ecx */ | |
a27e4371 | 4686 | |
07d6d2b8 | 4687 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4688 | 0x90, |
4689 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4690 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4691 | ||
4692 | /* Lazy GOT entries point here (32-byte aligned). */ | |
07d6d2b8 AM |
4693 | 0x68, /* pushl immediate */ |
4694 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
4695 | 0xe9, /* jmp relative */ | |
4696 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
a27e4371 | 4697 | |
07d6d2b8 | 4698 | /* Pad to the next 32-byte boundary with nop instructions. */ |
a27e4371 RM |
4699 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, |
4700 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
4701 | 0x90, 0x90 | |
4702 | }; | |
4703 | ||
4704 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
4705 | { | |
07d6d2b8 AM |
4706 | #if (PLT_CIE_LENGTH != 20 \ |
4707 | || PLT_FDE_LENGTH != 36 \ | |
4708 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
a27e4371 | 4709 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) |
851b6fa1 | 4710 | # error "Need elf_x86_backend_data parameters for eh_frame_plt offsets!" |
a27e4371 RM |
4711 | #endif |
4712 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
07d6d2b8 AM |
4713 | 0, 0, 0, 0, /* CIE ID */ |
4714 | 1, /* CIE version */ | |
4715 | 'z', 'R', 0, /* Augmentation string */ | |
4716 | 1, /* Code alignment factor */ | |
4717 | 0x7c, /* Data alignment factor: -4 */ | |
4718 | 8, /* Return address column */ | |
a27e4371 RM |
4719 | 1, /* Augmentation size */ |
4720 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
4721 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
4722 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
4723 | DW_CFA_nop, DW_CFA_nop, | |
4724 | ||
07d6d2b8 | 4725 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ |
a27e4371 | 4726 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ |
07d6d2b8 AM |
4727 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ |
4728 | 0, 0, 0, 0, /* .plt size goes here */ | |
4729 | 0, /* Augmentation size */ | |
4730 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
4731 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
4732 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
4733 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
4734 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
4735 | 13, /* Block length */ | |
4736 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
4737 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
a27e4371 RM |
4738 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, |
4739 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
4740 | DW_CFA_nop, DW_CFA_nop | |
4741 | }; | |
4742 | ||
765e526c | 4743 | static const struct elf_x86_lazy_plt_layout elf_i386_nacl_plt = |
a27e4371 RM |
4744 | { |
4745 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
4746 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
a27e4371 RM |
4747 | elf_i386_nacl_plt_entry, /* plt_entry */ |
4748 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
765e526c L |
4749 | 2, /* plt0_got1_offset */ |
4750 | 8, /* plt0_got2_offset */ | |
4751 | 0, /* plt0_got2_insn_end */ | |
a27e4371 RM |
4752 | 2, /* plt_got_offset */ |
4753 | 33, /* plt_reloc_offset */ | |
4754 | 38, /* plt_plt_offset */ | |
765e526c L |
4755 | 0, /* plt_got_insn_size */ |
4756 | 0, /* plt_plt_insn_end */ | |
a27e4371 RM |
4757 | 32, /* plt_lazy_offset */ |
4758 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
4759 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
4760 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
f604c2a2 | 4761 | sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
a27e4371 RM |
4762 | }; |
4763 | ||
851b6fa1 | 4764 | static const struct elf_x86_backend_data elf_i386_nacl_arch_bed = |
a27e4371 | 4765 | { |
07d6d2b8 | 4766 | is_nacl /* os */ |
a27e4371 RM |
4767 | }; |
4768 | ||
64b384e1 RM |
4769 | static bfd_boolean |
4770 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
4771 | { | |
4772 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
4773 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
4774 | return TRUE; | |
4775 | } | |
4776 | ||
a27e4371 RM |
4777 | #undef elf_backend_arch_data |
4778 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
4779 | ||
64b384e1 RM |
4780 | #undef elf_backend_object_p |
4781 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
4782 | #undef elf_backend_modify_segment_map |
4783 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
4784 | #undef elf_backend_modify_program_headers | |
4785 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
4786 | #undef elf_backend_final_write_processing |
4787 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 4788 | |
a27e4371 RM |
4789 | #include "elf32-target.h" |
4790 | ||
5a68afcf | 4791 | /* Restore defaults. */ |
64b384e1 | 4792 | #undef elf_backend_object_p |
5a68afcf RM |
4793 | #undef elf_backend_modify_segment_map |
4794 | #undef elf_backend_modify_program_headers | |
887badb3 | 4795 | #undef elf_backend_final_write_processing |
5a68afcf | 4796 | |
eac338cf PB |
4797 | /* VxWorks support. */ |
4798 | ||
4799 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 4800 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
4801 | #undef TARGET_LITTLE_NAME |
4802 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 4803 | #undef ELF_OSABI |
1587442d L |
4804 | #undef ELF_MAXPAGESIZE |
4805 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
4806 | #undef elf_backend_plt_alignment |
4807 | #define elf_backend_plt_alignment 4 | |
eac338cf | 4808 | |
851b6fa1 | 4809 | static const struct elf_x86_backend_data elf_i386_vxworks_arch_bed = |
23209a78 | 4810 | { |
07d6d2b8 | 4811 | is_vxworks /* os */ |
23209a78 | 4812 | }; |
eac338cf | 4813 | |
23209a78 RM |
4814 | #undef elf_backend_arch_data |
4815 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 4816 | |
13285a1b | 4817 | #undef elf_backend_relocs_compatible |
eac338cf PB |
4818 | #undef elf_backend_add_symbol_hook |
4819 | #define elf_backend_add_symbol_hook \ | |
4820 | elf_vxworks_add_symbol_hook | |
4821 | #undef elf_backend_link_output_symbol_hook | |
4822 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 4823 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
4824 | #undef elf_backend_emit_relocs |
4825 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
4826 | #undef elf_backend_final_write_processing | |
4827 | #define elf_backend_final_write_processing \ | |
4828 | elf_vxworks_final_write_processing | |
7dc98aea | 4829 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
4830 | |
4831 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
4832 | define it. */ | |
4833 | #undef elf_backend_want_plt_sym | |
4834 | #define elf_backend_want_plt_sym 1 | |
4835 | ||
4836 | #undef elf32_bed | |
4837 | #define elf32_bed elf32_i386_vxworks_bed | |
4838 | ||
4839 | #include "elf32-target.h" |