Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1993-2016 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 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
5a68afcf | 26 | #include "elf-nacl.h" |
eac338cf | 27 | #include "elf-vxworks.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
02a86693 | 32 | #include "opcode/i386.h" |
252b5132 | 33 | |
55fd94b0 AM |
34 | /* 386 uses REL relocations instead of RELA. */ |
35 | #define USE_REL 1 | |
252b5132 RH |
36 | |
37 | #include "elf/i386.h" | |
38 | ||
39 | static reloc_howto_type elf_howto_table[]= | |
40 | { | |
6346d5ca | 41 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 42 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
43 | TRUE, 0x00000000, 0x00000000, FALSE), |
44 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 45 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
46 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
47 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 48 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
49 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
50 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 51 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
52 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
53 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 54 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
55 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
56 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 57 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
58 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
59 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 60 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
61 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
62 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 63 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
64 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
65 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 66 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
67 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
68 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 69 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
70 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
71 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 72 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 73 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 74 | |
dc47f327 AM |
75 | /* We have a gap in the reloc numbers here. |
76 | R_386_standard counts the number up to this point, and | |
77 | R_386_ext_offset is the value to subtract from a reloc type of | |
78 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
79 | #define R_386_standard (R_386_GOTPC + 1) |
80 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 81 | |
37e55690 | 82 | /* These relocs are a GNU extension. */ |
b34976b6 | 83 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 84 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
85 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
86 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 87 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
88 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
89 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 90 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
91 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
92 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 93 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
94 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
95 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 96 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
97 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
98 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 99 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
100 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
101 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 102 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 103 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 104 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 105 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
106 | TRUE, 0xffff, 0xffff, TRUE), |
107 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 108 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
109 | TRUE, 0xff, 0xff, FALSE), |
110 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 111 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 112 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 113 | |
55fd94b0 AM |
114 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
115 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 116 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 117 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 118 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
119 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
120 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 121 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
122 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
123 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 124 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
125 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
126 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 127 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
128 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
129 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 130 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
131 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
132 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 133 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 134 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
135 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
136 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
137 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
138 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
139 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
140 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
141 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
142 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
143 | FALSE, 0, 0, FALSE), | |
144 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
146 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
147 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
148 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
149 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
150 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
151 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
152 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
153 | |
154 | /* Another gap. */ | |
02a86693 | 155 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 156 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
157 | |
158 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
159 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
160 | 0, /* rightshift */ | |
161 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 0, /* bitsize */ | |
b34976b6 | 163 | FALSE, /* pc_relative */ |
252b5132 RH |
164 | 0, /* bitpos */ |
165 | complain_overflow_dont, /* complain_on_overflow */ | |
166 | NULL, /* special_function */ | |
167 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 168 | FALSE, /* partial_inplace */ |
252b5132 RH |
169 | 0, /* src_mask */ |
170 | 0, /* dst_mask */ | |
b34976b6 | 171 | FALSE), /* pcrel_offset */ |
252b5132 RH |
172 | |
173 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
174 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
175 | 0, /* rightshift */ | |
176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 0, /* bitsize */ | |
b34976b6 | 178 | FALSE, /* pc_relative */ |
252b5132 RH |
179 | 0, /* bitpos */ |
180 | complain_overflow_dont, /* complain_on_overflow */ | |
181 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
182 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 183 | FALSE, /* partial_inplace */ |
252b5132 RH |
184 | 0, /* src_mask */ |
185 | 0, /* dst_mask */ | |
b34976b6 | 186 | FALSE) /* pcrel_offset */ |
dc47f327 | 187 | |
55fd94b0 | 188 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
189 | |
190 | }; | |
191 | ||
252b5132 | 192 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
193 | #define TRACE(str) \ |
194 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
195 | #else |
196 | #define TRACE(str) | |
197 | #endif | |
198 | ||
199 | static reloc_howto_type * | |
55fd94b0 AM |
200 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
201 | bfd_reloc_code_real_type code) | |
252b5132 RH |
202 | { |
203 | switch (code) | |
204 | { | |
205 | case BFD_RELOC_NONE: | |
206 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_32: | |
210 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_CTOR: | |
214 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_32_PCREL: | |
218 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_GOT32: | |
222 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_PLT32: | |
226 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_COPY: | |
230 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_GLOB_DAT: | |
234 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_JUMP_SLOT: | |
238 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_RELATIVE: | |
242 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTOFF: | |
246 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
248 | |
249 | case BFD_RELOC_386_GOTPC: | |
250 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 251 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 252 | |
37e55690 JJ |
253 | /* These relocs are a GNU extension. */ |
254 | case BFD_RELOC_386_TLS_TPOFF: | |
255 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_IE: | |
259 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
261 | |
262 | case BFD_RELOC_386_TLS_GOTIE: | |
263 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 265 | |
13ae64f3 JJ |
266 | case BFD_RELOC_386_TLS_LE: |
267 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_GD: | |
271 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
273 | |
274 | case BFD_RELOC_386_TLS_LDM: | |
275 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 277 | |
252b5132 RH |
278 | case BFD_RELOC_16: |
279 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_16_PCREL: | |
283 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8: | |
287 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
289 | |
290 | case BFD_RELOC_8_PCREL: | |
291 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 292 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 293 | |
13ae64f3 JJ |
294 | /* Common with Sun TLS implementation. */ |
295 | case BFD_RELOC_386_TLS_LDO_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_IE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_LE_32: | |
304 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPMOD32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_DTPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
314 | |
315 | case BFD_RELOC_386_TLS_TPOFF32: | |
316 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 317 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 318 | |
1788fc08 L |
319 | case BFD_RELOC_SIZE32: |
320 | TRACE ("BFD_RELOC_SIZE32"); | |
321 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
322 | ||
67a4f2b7 AO |
323 | case BFD_RELOC_386_TLS_GOTDESC: |
324 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
325 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DESC_CALL: | |
328 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
329 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
330 | ||
331 | case BFD_RELOC_386_TLS_DESC: | |
332 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
333 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
334 | ||
cbe950e9 L |
335 | case BFD_RELOC_386_IRELATIVE: |
336 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 337 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 338 | |
02a86693 L |
339 | case BFD_RELOC_386_GOT32X: |
340 | TRACE ("BFD_RELOC_386_GOT32X"); | |
341 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
342 | ||
252b5132 RH |
343 | case BFD_RELOC_VTABLE_INHERIT: |
344 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 345 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
346 | |
347 | case BFD_RELOC_VTABLE_ENTRY: | |
348 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 349 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
350 | |
351 | default: | |
352 | break; | |
353 | } | |
354 | ||
355 | TRACE ("Unknown"); | |
356 | return 0; | |
357 | } | |
358 | ||
157090f7 AM |
359 | static reloc_howto_type * |
360 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
361 | const char *r_name) | |
362 | { | |
363 | unsigned int i; | |
364 | ||
365 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
366 | if (elf_howto_table[i].name != NULL | |
367 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
368 | return &elf_howto_table[i]; | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
142411ca L |
373 | static reloc_howto_type * |
374 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 375 | { |
dc47f327 AM |
376 | unsigned int indx; |
377 | ||
378 | if ((indx = r_type) >= R_386_standard | |
379 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
380 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 381 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
382 | >= R_386_ext2 - R_386_ext) |
383 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
384 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 385 | { |
d003868e AM |
386 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
387 | abfd, (int) r_type); | |
55fd94b0 | 388 | indx = R_386_NONE; |
252b5132 | 389 | } |
06614111 NC |
390 | /* PR 17512: file: 0f67f69d. */ |
391 | if (elf_howto_table [indx].type != r_type) | |
392 | return NULL; | |
142411ca L |
393 | return &elf_howto_table[indx]; |
394 | } | |
395 | ||
396 | static void | |
397 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
398 | arelent *cache_ptr, | |
399 | Elf_Internal_Rela *dst) | |
400 | { | |
401 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
402 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
403 | } |
404 | ||
405 | /* Return whether a symbol name implies a local label. The UnixWare | |
406 | 2.1 cc generates temporary symbols that start with .X, so we | |
407 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
408 | If so, we should move the .X recognition into | |
409 | _bfd_elf_is_local_label_name. */ | |
410 | ||
b34976b6 | 411 | static bfd_boolean |
55fd94b0 | 412 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
413 | { |
414 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 415 | return TRUE; |
252b5132 RH |
416 | |
417 | return _bfd_elf_is_local_label_name (abfd, name); | |
418 | } | |
419 | \f | |
38701953 | 420 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 421 | |
b34976b6 | 422 | static bfd_boolean |
55fd94b0 | 423 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
424 | { |
425 | int offset; | |
eea6121a | 426 | size_t size; |
38701953 | 427 | |
61adc1a4 | 428 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 429 | { |
61adc1a4 NC |
430 | int pr_version = bfd_get_32 (abfd, note->descdata); |
431 | ||
432 | if (pr_version != 1) | |
433 | return FALSE; | |
434 | ||
435 | /* pr_cursig */ | |
228e534f | 436 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
437 | |
438 | /* pr_pid */ | |
228e534f | 439 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
440 | |
441 | /* pr_reg */ | |
442 | offset = 28; | |
eea6121a | 443 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
444 | } |
445 | else | |
446 | { | |
447 | switch (note->descsz) | |
448 | { | |
449 | default: | |
450 | return FALSE; | |
38701953 | 451 | |
61adc1a4 NC |
452 | case 144: /* Linux/i386 */ |
453 | /* pr_cursig */ | |
228e534f | 454 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 455 | |
61adc1a4 | 456 | /* pr_pid */ |
228e534f | 457 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 458 | |
61adc1a4 NC |
459 | /* pr_reg */ |
460 | offset = 72; | |
eea6121a | 461 | size = 68; |
38701953 | 462 | |
61adc1a4 NC |
463 | break; |
464 | } | |
38701953 AM |
465 | } |
466 | ||
467 | /* Make a ".reg/999" section. */ | |
468 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 469 | size, note->descpos + offset); |
38701953 AM |
470 | } |
471 | ||
b34976b6 | 472 | static bfd_boolean |
55fd94b0 | 473 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 474 | { |
61adc1a4 | 475 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 476 | { |
61adc1a4 NC |
477 | int pr_version = bfd_get_32 (abfd, note->descdata); |
478 | ||
479 | if (pr_version != 1) | |
b34976b6 | 480 | return FALSE; |
38701953 | 481 | |
228e534f | 482 | elf_tdata (abfd)->core->program |
61adc1a4 | 483 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 484 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
485 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
486 | } | |
487 | else | |
488 | { | |
489 | switch (note->descsz) | |
490 | { | |
491 | default: | |
492 | return FALSE; | |
493 | ||
494 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 495 | elf_tdata (abfd)->core->pid |
261b8d08 | 496 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 497 | elf_tdata (abfd)->core->program |
61adc1a4 | 498 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 499 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
500 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
501 | } | |
38701953 AM |
502 | } |
503 | ||
504 | /* Note that for some reason, a spurious space is tacked | |
505 | onto the end of the args in some (at least one anyway) | |
506 | implementations, so strip it off if it exists. */ | |
38701953 | 507 | { |
228e534f | 508 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
509 | int n = strlen (command); |
510 | ||
511 | if (0 < n && command[n - 1] == ' ') | |
512 | command[n - 1] = '\0'; | |
513 | } | |
514 | ||
b34976b6 | 515 | return TRUE; |
38701953 AM |
516 | } |
517 | \f | |
518 | /* Functions for the i386 ELF linker. | |
519 | ||
520 | In order to gain some understanding of code in this file without | |
521 | knowing all the intricate details of the linker, note the | |
522 | following: | |
523 | ||
524 | Functions named elf_i386_* are called by external routines, other | |
525 | functions are only called locally. elf_i386_* functions appear | |
526 | in this file more or less in the order in which they are called | |
527 | from external routines. eg. elf_i386_check_relocs is called | |
528 | early in the link process, elf_i386_finish_dynamic_sections is | |
529 | one of the last functions. */ | |
530 | ||
252b5132 RH |
531 | |
532 | /* The name of the dynamic interpreter. This is put in the .interp | |
533 | section. */ | |
534 | ||
535 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
536 | ||
a23b6845 AM |
537 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
538 | copying dynamic variables from a shared lib into an app's dynbss | |
539 | section, and instead use a dynamic relocation to point into the | |
540 | shared lib. */ | |
541 | #define ELIMINATE_COPY_RELOCS 1 | |
542 | ||
252b5132 RH |
543 | /* The size in bytes of an entry in the procedure linkage table. */ |
544 | ||
545 | #define PLT_ENTRY_SIZE 16 | |
546 | ||
547 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
548 | this. See the SVR4 ABI i386 supplement to see how this works. |
549 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 550 | |
eac338cf | 551 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
552 | { |
553 | 0xff, 0x35, /* pushl contents of address */ | |
554 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
555 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 556 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
557 | }; |
558 | ||
559 | /* Subsequent entries in an absolute procedure linkage table look like | |
560 | this. */ | |
561 | ||
562 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
563 | { | |
564 | 0xff, 0x25, /* jmp indirect */ | |
565 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
566 | 0x68, /* pushl immediate */ | |
567 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
568 | 0xe9, /* jmp relative */ | |
569 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
570 | }; | |
571 | ||
eac338cf PB |
572 | /* The first entry in a PIC procedure linkage table look like this. |
573 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 574 | |
eac338cf | 575 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
576 | { |
577 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 578 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
579 | }; |
580 | ||
581 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
582 | ||
583 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
584 | { | |
585 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
586 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
587 | 0x68, /* pushl immediate */ | |
588 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
589 | 0xe9, /* jmp relative */ | |
590 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
591 | }; | |
592 | ||
dd7e64d4 L |
593 | /* Entries in the GOT procedure linkage table look like this. */ |
594 | ||
595 | static const bfd_byte elf_i386_got_plt_entry[8] = | |
596 | { | |
597 | 0xff, 0x25, /* jmp indirect */ | |
598 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
599 | 0x66, 0x90 /* xchg %ax,%ax */ | |
600 | }; | |
601 | ||
602 | /* Entries in the PIC GOT procedure linkage table look like this. */ | |
603 | ||
604 | static const bfd_byte elf_i386_pic_got_plt_entry[8] = | |
605 | { | |
606 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
607 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
608 | 0x66, 0x90 /* xchg %ax,%ax */ | |
609 | }; | |
610 | ||
e41b3a13 JJ |
611 | /* .eh_frame covering the .plt section. */ |
612 | ||
613 | static const bfd_byte elf_i386_eh_frame_plt[] = | |
614 | { | |
615 | #define PLT_CIE_LENGTH 20 | |
616 | #define PLT_FDE_LENGTH 36 | |
617 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
618 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
619 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
620 | 0, 0, 0, 0, /* CIE ID */ | |
621 | 1, /* CIE version */ | |
622 | 'z', 'R', 0, /* Augmentation string */ | |
623 | 1, /* Code alignment factor */ | |
624 | 0x7c, /* Data alignment factor */ | |
625 | 8, /* Return address column */ | |
626 | 1, /* Augmentation size */ | |
627 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
628 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
629 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
630 | DW_CFA_nop, DW_CFA_nop, | |
631 | ||
632 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
633 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
634 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
635 | 0, 0, 0, 0, /* .plt size goes here */ | |
636 | 0, /* Augmentation size */ | |
637 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
638 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
639 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
640 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
641 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
642 | 11, /* Block length */ | |
643 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
644 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
645 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 646 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
647 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
648 | }; | |
649 | ||
25e762b9 RM |
650 | struct elf_i386_plt_layout |
651 | { | |
652 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
653 | const bfd_byte *plt0_entry; | |
654 | unsigned int plt0_entry_size; | |
655 | ||
656 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
657 | unsigned int plt0_got1_offset; | |
658 | unsigned int plt0_got2_offset; | |
659 | ||
660 | /* Later entries in an absolute procedure linkage table look like this. */ | |
661 | const bfd_byte *plt_entry; | |
662 | unsigned int plt_entry_size; | |
663 | ||
664 | /* Offsets into plt_entry that are to be replaced with... */ | |
665 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
666 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
667 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
668 | ||
669 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
670 | unsigned int plt_lazy_offset; | |
671 | ||
672 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
673 | const bfd_byte *pic_plt0_entry; | |
674 | ||
675 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
676 | const bfd_byte *pic_plt_entry; | |
677 | ||
678 | /* .eh_frame covering the .plt section. */ | |
679 | const bfd_byte *eh_frame_plt; | |
680 | unsigned int eh_frame_plt_size; | |
681 | }; | |
682 | ||
683 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
684 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
685 | ||
686 | /* These are the standard parameters. */ | |
687 | static const struct elf_i386_plt_layout elf_i386_plt = | |
688 | { | |
689 | elf_i386_plt0_entry, /* plt0_entry */ | |
690 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
691 | 2, /* plt0_got1_offset */ | |
692 | 8, /* plt0_got2_offset */ | |
693 | elf_i386_plt_entry, /* plt_entry */ | |
694 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
695 | 2, /* plt_got_offset */ | |
696 | 7, /* plt_reloc_offset */ | |
697 | 12, /* plt_plt_offset */ | |
698 | 6, /* plt_lazy_offset */ | |
699 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
700 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
701 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
702 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
703 | }; | |
704 | \f | |
705 | ||
eac338cf PB |
706 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
707 | for the PLTResolve stub and then for each PLT entry. */ | |
708 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
709 | #define PLTRESOLVE_RELOCS 2 | |
710 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
711 | ||
23209a78 RM |
712 | /* Architecture-specific backend data for i386. */ |
713 | ||
714 | struct elf_i386_backend_data | |
715 | { | |
25e762b9 RM |
716 | /* Parameters describing PLT generation. */ |
717 | const struct elf_i386_plt_layout *plt; | |
718 | ||
23209a78 RM |
719 | /* Value used to fill the unused bytes of the first PLT entry. */ |
720 | bfd_byte plt0_pad_byte; | |
721 | ||
722 | /* True if the target system is VxWorks. */ | |
723 | int is_vxworks; | |
724 | }; | |
725 | ||
726 | #define get_elf_i386_backend_data(abfd) \ | |
727 | ((const struct elf_i386_backend_data *) \ | |
728 | get_elf_backend_data (abfd)->arch_data) | |
729 | ||
730 | /* These are the standard parameters. */ | |
731 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
732 | { | |
25e762b9 | 733 | &elf_i386_plt, /* plt */ |
23209a78 RM |
734 | 0, /* plt0_pad_byte */ |
735 | 0, /* is_vxworks */ | |
736 | }; | |
737 | ||
738 | #define elf_backend_arch_data &elf_i386_arch_bed | |
739 | ||
aec6b87e L |
740 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
741 | undefined weak symbol is resolved to 0 when building executable if | |
742 | it isn't dynamic and | |
743 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
744 | 2. Has no GOT/PLT relocation. | |
745 | */ | |
746 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, EH) \ | |
747 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ | |
748 | && bfd_link_executable (INFO) \ | |
749 | && (elf_i386_hash_table (INFO)->interp == NULL \ | |
750 | || !(EH)->has_got_reloc \ | |
751 | || (EH)->has_non_got_reloc \ | |
752 | || !(INFO)->dynamic_undefined_weak)) | |
753 | ||
252b5132 RH |
754 | /* i386 ELF linker hash entry. */ |
755 | ||
756 | struct elf_i386_link_hash_entry | |
757 | { | |
ebe50bae | 758 | struct elf_link_hash_entry elf; |
252b5132 | 759 | |
0c715baa | 760 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 761 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 762 | |
37e55690 JJ |
763 | #define GOT_UNKNOWN 0 |
764 | #define GOT_NORMAL 1 | |
765 | #define GOT_TLS_GD 2 | |
766 | #define GOT_TLS_IE 4 | |
767 | #define GOT_TLS_IE_POS 5 | |
768 | #define GOT_TLS_IE_NEG 6 | |
769 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
770 | #define GOT_TLS_GDESC 8 |
771 | #define GOT_TLS_GD_BOTH_P(type) \ | |
772 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
773 | #define GOT_TLS_GD_P(type) \ | |
774 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
775 | #define GOT_TLS_GDESC_P(type) \ | |
776 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
777 | #define GOT_TLS_GD_ANY_P(type) \ | |
778 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 779 | unsigned char tls_type; |
67a4f2b7 | 780 | |
d5597ebc L |
781 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
782 | unsigned int gotoff_ref : 1; | |
783 | ||
aec6b87e L |
784 | /* Symbol has GOT or PLT relocations. */ |
785 | unsigned int has_got_reloc : 1; | |
786 | ||
787 | /* Symbol has non-GOT/non-PLT relocations in text sections. */ | |
788 | unsigned int has_non_got_reloc : 1; | |
789 | ||
04ebc307 L |
790 | /* Reference count of C/C++ function pointer relocations in read-write |
791 | section which can be resolved at run-time. */ | |
792 | bfd_signed_vma func_pointer_refcount; | |
793 | ||
dd7e64d4 L |
794 | /* Information about the GOT PLT entry. Filled when there are both |
795 | GOT and PLT relocations against the same function. */ | |
796 | union gotplt_union plt_got; | |
797 | ||
67a4f2b7 AO |
798 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
799 | starting at the end of the jump table. */ | |
800 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
801 | }; |
802 | ||
803 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
804 | ||
805 | struct elf_i386_obj_tdata | |
806 | { | |
807 | struct elf_obj_tdata root; | |
808 | ||
809 | /* tls_type for each local got entry. */ | |
810 | char *local_got_tls_type; | |
67a4f2b7 AO |
811 | |
812 | /* GOTPLT entries for TLS descriptors. */ | |
813 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
814 | }; |
815 | ||
13ae64f3 JJ |
816 | #define elf_i386_tdata(abfd) \ |
817 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
818 | ||
819 | #define elf_i386_local_got_tls_type(abfd) \ | |
820 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
821 | ||
67a4f2b7 AO |
822 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
823 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
824 | ||
0ffa91dd NC |
825 | #define is_i386_elf(bfd) \ |
826 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
827 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 828 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 829 | |
b34976b6 | 830 | static bfd_boolean |
55fd94b0 | 831 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 832 | { |
0ffa91dd | 833 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 834 | I386_ELF_DATA); |
13ae64f3 | 835 | } |
cedb70c5 | 836 | |
252b5132 RH |
837 | /* i386 ELF linker hash table. */ |
838 | ||
839 | struct elf_i386_link_hash_table | |
840 | { | |
ebe50bae | 841 | struct elf_link_hash_table elf; |
252b5132 | 842 | |
6725bdbf | 843 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 844 | asection *interp; |
6725bdbf AM |
845 | asection *sdynbss; |
846 | asection *srelbss; | |
e41b3a13 | 847 | asection *plt_eh_frame; |
dd7e64d4 | 848 | asection *plt_got; |
9635fe29 | 849 | |
4dfe6ac6 NC |
850 | union |
851 | { | |
13ae64f3 JJ |
852 | bfd_signed_vma refcount; |
853 | bfd_vma offset; | |
854 | } tls_ldm_got; | |
855 | ||
67a4f2b7 AO |
856 | /* The amount of space used by the reserved portion of the sgotplt |
857 | section, plus whatever space is used by the jump slots. */ | |
858 | bfd_vma sgotplt_jump_table_size; | |
859 | ||
87d72d41 AM |
860 | /* Small local sym cache. */ |
861 | struct sym_cache sym_cache; | |
9f03412a AO |
862 | |
863 | /* _TLS_MODULE_BASE_ symbol. */ | |
864 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
865 | |
866 | /* Used by local STT_GNU_IFUNC symbols. */ | |
867 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
868 | void * loc_hash_memory; |
869 | ||
870 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
871 | asection *srelplt2; | |
872 | ||
4dfe6ac6 NC |
873 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
874 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
875 | |
876 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
877 | bfd_vma next_jump_slot_index; | |
878 | ||
879 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
880 | bfd_vma next_irelative_index; | |
6725bdbf | 881 | }; |
252b5132 RH |
882 | |
883 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
884 | ||
885 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
886 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
887 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 888 | |
67a4f2b7 | 889 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 890 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 891 | |
252b5132 RH |
892 | /* Create an entry in an i386 ELF linker hash table. */ |
893 | ||
894 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
895 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
896 | struct bfd_hash_table *table, | |
897 | const char *string) | |
252b5132 | 898 | { |
252b5132 RH |
899 | /* Allocate the structure if it has not already been allocated by a |
900 | subclass. */ | |
ebe50bae AM |
901 | if (entry == NULL) |
902 | { | |
a50b1753 NC |
903 | entry = (struct bfd_hash_entry *) |
904 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
905 | if (entry == NULL) |
906 | return entry; | |
907 | } | |
252b5132 RH |
908 | |
909 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
910 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
911 | if (entry != NULL) | |
252b5132 | 912 | { |
ebe50bae AM |
913 | struct elf_i386_link_hash_entry *eh; |
914 | ||
915 | eh = (struct elf_i386_link_hash_entry *) entry; | |
916 | eh->dyn_relocs = NULL; | |
13ae64f3 | 917 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 918 | eh->gotoff_ref = 0; |
aec6b87e L |
919 | eh->has_got_reloc = 0; |
920 | eh->has_non_got_reloc = 0; | |
04ebc307 | 921 | eh->func_pointer_refcount = 0; |
dd7e64d4 | 922 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 923 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
924 | } |
925 | ||
ebe50bae | 926 | return entry; |
252b5132 RH |
927 | } |
928 | ||
c25bc9fc L |
929 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
930 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
931 | as global symbol. We reuse indx and dynstr_index for local symbol | |
932 | hash since they aren't used by global symbols in this backend. */ | |
933 | ||
934 | static hashval_t | |
935 | elf_i386_local_htab_hash (const void *ptr) | |
936 | { | |
937 | struct elf_link_hash_entry *h | |
938 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 939 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
940 | } |
941 | ||
942 | /* Compare local hash entries. */ | |
943 | ||
944 | static int | |
945 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
946 | { | |
947 | struct elf_link_hash_entry *h1 | |
948 | = (struct elf_link_hash_entry *) ptr1; | |
949 | struct elf_link_hash_entry *h2 | |
950 | = (struct elf_link_hash_entry *) ptr2; | |
951 | ||
952 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
953 | } | |
954 | ||
955 | /* Find and/or create a hash entry for local symbol. */ | |
956 | ||
957 | static struct elf_link_hash_entry * | |
958 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
959 | bfd *abfd, const Elf_Internal_Rela *rel, | |
960 | bfd_boolean create) | |
961 | { | |
962 | struct elf_i386_link_hash_entry e, *ret; | |
963 | asection *sec = abfd->sections; | |
d2149d72 L |
964 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
965 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
966 | void **slot; |
967 | ||
968 | e.elf.indx = sec->id; | |
969 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
970 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
971 | create ? INSERT : NO_INSERT); | |
972 | ||
973 | if (!slot) | |
974 | return NULL; | |
975 | ||
976 | if (*slot) | |
977 | { | |
978 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
979 | return &ret->elf; | |
980 | } | |
981 | ||
982 | ret = (struct elf_i386_link_hash_entry *) | |
983 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
984 | sizeof (struct elf_i386_link_hash_entry)); | |
985 | if (ret) | |
986 | { | |
987 | memset (ret, 0, sizeof (*ret)); | |
988 | ret->elf.indx = sec->id; | |
989 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
990 | ret->elf.dynindx = -1; | |
04ebc307 | 991 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 992 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
993 | *slot = ret; |
994 | } | |
995 | return &ret->elf; | |
996 | } | |
997 | ||
68faa637 AM |
998 | /* Destroy an i386 ELF linker hash table. */ |
999 | ||
1000 | static void | |
d495ab0d | 1001 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1002 | { |
1003 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 1004 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1005 | |
1006 | if (htab->loc_hash_table) | |
1007 | htab_delete (htab->loc_hash_table); | |
1008 | if (htab->loc_hash_memory) | |
1009 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1010 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1011 | } |
1012 | ||
252b5132 RH |
1013 | /* Create an i386 ELF linker hash table. */ |
1014 | ||
1015 | static struct bfd_link_hash_table * | |
55fd94b0 | 1016 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1017 | { |
1018 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 1019 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 1020 | |
7bf52ea2 | 1021 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 1022 | if (ret == NULL) |
252b5132 RH |
1023 | return NULL; |
1024 | ||
eb4ff4d6 L |
1025 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1026 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
1027 | sizeof (struct elf_i386_link_hash_entry), |
1028 | I386_ELF_DATA)) | |
252b5132 | 1029 | { |
e2d34d7d | 1030 | free (ret); |
252b5132 RH |
1031 | return NULL; |
1032 | } | |
1033 | ||
c25bc9fc L |
1034 | ret->loc_hash_table = htab_try_create (1024, |
1035 | elf_i386_local_htab_hash, | |
1036 | elf_i386_local_htab_eq, | |
1037 | NULL); | |
1038 | ret->loc_hash_memory = objalloc_create (); | |
1039 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1040 | { | |
d495ab0d | 1041 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1042 | return NULL; |
1043 | } | |
d495ab0d | 1044 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1045 | |
ebe50bae | 1046 | return &ret->elf.root; |
252b5132 RH |
1047 | } |
1048 | ||
6725bdbf AM |
1049 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1050 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1051 | hash table. */ | |
1052 | ||
b34976b6 | 1053 | static bfd_boolean |
55fd94b0 | 1054 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1055 | { |
1056 | struct elf_i386_link_hash_table *htab; | |
1057 | ||
6725bdbf | 1058 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1059 | return FALSE; |
6725bdbf | 1060 | |
6de2ae4a | 1061 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1062 | if (htab == NULL) |
1063 | return FALSE; | |
1064 | ||
3d4d4302 | 1065 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
d5597ebc | 1066 | if (!htab->sdynbss) |
6725bdbf AM |
1067 | abort (); |
1068 | ||
0e1862bb | 1069 | if (bfd_link_executable (info)) |
d5597ebc L |
1070 | { |
1071 | /* Always allow copy relocs for building executables. */ | |
1072 | asection *s = bfd_get_linker_section (dynobj, ".rel.bss"); | |
1073 | if (s == NULL) | |
1074 | { | |
1075 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1076 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1077 | ".rel.bss", | |
1078 | (bed->dynamic_sec_flags | |
1079 | | SEC_READONLY)); | |
1080 | if (s == NULL | |
1081 | || ! bfd_set_section_alignment (dynobj, s, | |
1082 | bed->s->log_file_align)) | |
1083 | return FALSE; | |
1084 | } | |
1085 | htab->srelbss = s; | |
1086 | } | |
1087 | ||
23209a78 | 1088 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1089 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1090 | &htab->srelplt2)) | |
711de32c | 1091 | return FALSE; |
eac338cf | 1092 | |
e41b3a13 | 1093 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1094 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1095 | && htab->elf.splt != NULL) |
e41b3a13 | 1096 | { |
bbf96e4e L |
1097 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1098 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1099 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1100 | htab->plt_eh_frame |
bbf96e4e | 1101 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1102 | if (htab->plt_eh_frame == NULL |
1103 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1104 | return FALSE; | |
e41b3a13 JJ |
1105 | } |
1106 | ||
b34976b6 | 1107 | return TRUE; |
6725bdbf AM |
1108 | } |
1109 | ||
ebe50bae AM |
1110 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1111 | ||
51b64d56 | 1112 | static void |
fcfa13d2 | 1113 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1114 | struct elf_link_hash_entry *dir, |
1115 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1116 | { |
1117 | struct elf_i386_link_hash_entry *edir, *eind; | |
1118 | ||
1119 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1120 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1121 | ||
bbd7ec4a | 1122 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1123 | { |
bbd7ec4a AM |
1124 | if (edir->dyn_relocs != NULL) |
1125 | { | |
e03a8ed8 L |
1126 | struct elf_dyn_relocs **pp; |
1127 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1128 | |
fcfa13d2 | 1129 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1130 | list. Merge any entries against the same section. */ |
1131 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1132 | { | |
e03a8ed8 | 1133 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1134 | |
1135 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1136 | if (q->sec == p->sec) | |
1137 | { | |
1138 | q->pc_count += p->pc_count; | |
1139 | q->count += p->count; | |
1140 | *pp = p->next; | |
1141 | break; | |
1142 | } | |
1143 | if (q == NULL) | |
1144 | pp = &p->next; | |
1145 | } | |
1146 | *pp = edir->dyn_relocs; | |
1147 | } | |
1148 | ||
ebe50bae AM |
1149 | edir->dyn_relocs = eind->dyn_relocs; |
1150 | eind->dyn_relocs = NULL; | |
1151 | } | |
ebe50bae | 1152 | |
cd67d266 JJ |
1153 | if (ind->root.type == bfd_link_hash_indirect |
1154 | && dir->got.refcount <= 0) | |
1155 | { | |
1156 | edir->tls_type = eind->tls_type; | |
1157 | eind->tls_type = GOT_UNKNOWN; | |
1158 | } | |
81848ca0 | 1159 | |
d5597ebc L |
1160 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1161 | generate a R_386_COPY reloc. */ | |
1162 | edir->gotoff_ref |= eind->gotoff_ref; | |
1163 | ||
aec6b87e L |
1164 | edir->has_got_reloc |= eind->has_got_reloc; |
1165 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
1166 | ||
81848ca0 AM |
1167 | if (ELIMINATE_COPY_RELOCS |
1168 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1169 | && dir->dynamic_adjusted) |
1170 | { | |
1171 | /* If called to transfer flags for a weakdef during processing | |
1172 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1173 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1174 | dir->ref_dynamic |= ind->ref_dynamic; | |
1175 | dir->ref_regular |= ind->ref_regular; | |
1176 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1177 | dir->needs_plt |= ind->needs_plt; | |
1178 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1179 | } | |
81848ca0 | 1180 | else |
04ebc307 L |
1181 | { |
1182 | if (eind->func_pointer_refcount > 0) | |
1183 | { | |
1184 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1185 | eind->func_pointer_refcount = 0; | |
1186 | } | |
1187 | ||
1188 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1189 | } | |
ebe50bae AM |
1190 | } |
1191 | ||
142411ca L |
1192 | /* Return TRUE if the TLS access code sequence support transition |
1193 | from R_TYPE. */ | |
1194 | ||
1195 | static bfd_boolean | |
1196 | elf_i386_check_tls_transition (bfd *abfd, asection *sec, | |
1197 | bfd_byte *contents, | |
1198 | Elf_Internal_Shdr *symtab_hdr, | |
1199 | struct elf_link_hash_entry **sym_hashes, | |
1200 | unsigned int r_type, | |
1201 | const Elf_Internal_Rela *rel, | |
1202 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1203 | { |
142411ca L |
1204 | unsigned int val, type; |
1205 | unsigned long r_symndx; | |
1206 | struct elf_link_hash_entry *h; | |
1207 | bfd_vma offset; | |
1208 | ||
1209 | /* Get the section contents. */ | |
1210 | if (contents == NULL) | |
1211 | { | |
1212 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1213 | contents = elf_section_data (sec)->this_hdr.contents; | |
1214 | else | |
1215 | { | |
1216 | /* FIXME: How to better handle error condition? */ | |
1217 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1218 | return FALSE; | |
13ae64f3 | 1219 | |
142411ca L |
1220 | /* Cache the section contents for elf_link_input_bfd. */ |
1221 | elf_section_data (sec)->this_hdr.contents = contents; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | offset = rel->r_offset; | |
13ae64f3 | 1226 | switch (r_type) |
142411ca L |
1227 | { |
1228 | case R_386_TLS_GD: | |
1229 | case R_386_TLS_LDM: | |
1230 | if (offset < 2 || (rel + 1) >= relend) | |
1231 | return FALSE; | |
1232 | ||
1233 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1234 | if (r_type == R_386_TLS_GD) | |
1235 | { | |
09e8c3bf | 1236 | /* Check transition from GD access model. Only |
142411ca L |
1237 | leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr |
1238 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop | |
1239 | can transit to different access model. */ | |
1240 | if ((offset + 10) > sec->size || | |
1241 | (type != 0x8d && type != 0x04)) | |
1242 | return FALSE; | |
1243 | ||
1244 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1245 | if (type == 0x04) | |
1246 | { | |
1247 | /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */ | |
1248 | if (offset < 3) | |
1249 | return FALSE; | |
1250 | ||
1251 | if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d) | |
1252 | return FALSE; | |
1253 | ||
1254 | if ((val & 0xc7) != 0x05 || val == (4 << 3)) | |
1255 | return FALSE; | |
1256 | } | |
1257 | else | |
1258 | { | |
1259 | /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */ | |
1260 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1261 | return FALSE; | |
1262 | ||
1263 | if (bfd_get_8 (abfd, contents + offset + 9) != 0x90) | |
1264 | return FALSE; | |
1265 | } | |
1266 | } | |
1267 | else | |
1268 | { | |
1269 | /* Check transition from LD access model. Only | |
1270 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr | |
1271 | can transit to different access model. */ | |
1272 | if (type != 0x8d || (offset + 9) > sec->size) | |
1273 | return FALSE; | |
1274 | ||
1275 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1276 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1277 | return FALSE; | |
1278 | } | |
1279 | ||
1280 | if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8) | |
1281 | return FALSE; | |
1282 | ||
1283 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1284 | if (r_symndx < symtab_hdr->sh_info) | |
1285 | return FALSE; | |
1286 | ||
1287 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
1288 | /* Use strncmp to check ___tls_get_addr since ___tls_get_addr |
1289 | may be versioned. */ | |
142411ca L |
1290 | return (h != NULL |
1291 | && h->root.root.string != NULL | |
1292 | && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1293 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32) | |
c4fb387b L |
1294 | && (strncmp (h->root.root.string, "___tls_get_addr", |
1295 | 15) == 0)); | |
142411ca L |
1296 | |
1297 | case R_386_TLS_IE: | |
1298 | /* Check transition from IE access model: | |
1299 | movl foo@indntpoff(%rip), %eax | |
1300 | movl foo@indntpoff(%rip), %reg | |
1301 | addl foo@indntpoff(%rip), %reg | |
1302 | */ | |
1303 | ||
1304 | if (offset < 1 || (offset + 4) > sec->size) | |
1305 | return FALSE; | |
1306 | ||
1307 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1308 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1309 | if (val == 0xa1) | |
1310 | return TRUE; | |
1311 | ||
1312 | if (offset < 2) | |
1313 | return FALSE; | |
1314 | ||
1315 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1316 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1317 | return ((type == 0x8b || type == 0x03) | |
1318 | && (val & 0xc7) == 0x05); | |
1319 | ||
1320 | case R_386_TLS_GOTIE: | |
1321 | case R_386_TLS_IE_32: | |
1322 | /* Check transition from {IE_32,GOTIE} access model: | |
1323 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1324 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1325 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1326 | */ | |
1327 | ||
1328 | if (offset < 2 || (offset + 4) > sec->size) | |
1329 | return FALSE; | |
1330 | ||
1331 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1332 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1333 | return FALSE; | |
1334 | ||
1335 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1336 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1337 | ||
1338 | case R_386_TLS_GOTDESC: | |
1339 | /* Check transition from GDesc access model: | |
1340 | leal x@tlsdesc(%ebx), %eax | |
1341 | ||
1342 | Make sure it's a leal adding ebx to a 32-bit offset | |
1343 | into any register, although it's probably almost always | |
1344 | going to be eax. */ | |
1345 | ||
1346 | if (offset < 2 || (offset + 4) > sec->size) | |
1347 | return FALSE; | |
1348 | ||
1349 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1350 | return FALSE; | |
1351 | ||
1352 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1353 | return (val & 0xc7) == 0x83; | |
1354 | ||
1355 | case R_386_TLS_DESC_CALL: | |
1356 | /* Check transition from GDesc access model: | |
1357 | call *x@tlsdesc(%rax) | |
1358 | */ | |
1359 | if (offset + 2 <= sec->size) | |
1360 | { | |
1361 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1362 | static const unsigned char call[] = { 0xff, 0x10 }; |
1363 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1364 | } |
1365 | ||
1366 | return FALSE; | |
1367 | ||
1368 | default: | |
1369 | abort (); | |
1370 | } | |
1371 | } | |
1372 | ||
1373 | /* Return TRUE if the TLS access transition is OK or no transition | |
1374 | will be performed. Update R_TYPE if there is a transition. */ | |
1375 | ||
1376 | static bfd_boolean | |
1377 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1378 | asection *sec, bfd_byte *contents, | |
1379 | Elf_Internal_Shdr *symtab_hdr, | |
1380 | struct elf_link_hash_entry **sym_hashes, | |
1381 | unsigned int *r_type, int tls_type, | |
1382 | const Elf_Internal_Rela *rel, | |
1383 | const Elf_Internal_Rela *relend, | |
4c544807 L |
1384 | struct elf_link_hash_entry *h, |
1385 | unsigned long r_symndx) | |
142411ca L |
1386 | { |
1387 | unsigned int from_type = *r_type; | |
1388 | unsigned int to_type = from_type; | |
1389 | bfd_boolean check = TRUE; | |
1390 | ||
bb1cb422 L |
1391 | /* Skip TLS transition for functions. */ |
1392 | if (h != NULL | |
1393 | && (h->type == STT_FUNC | |
1394 | || h->type == STT_GNU_IFUNC)) | |
1395 | return TRUE; | |
1396 | ||
142411ca | 1397 | switch (from_type) |
13ae64f3 JJ |
1398 | { |
1399 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1400 | case R_386_TLS_GOTDESC: |
1401 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1402 | case R_386_TLS_IE_32: |
37e55690 JJ |
1403 | case R_386_TLS_IE: |
1404 | case R_386_TLS_GOTIE: | |
0e1862bb | 1405 | if (bfd_link_executable (info)) |
142411ca L |
1406 | { |
1407 | if (h == NULL) | |
1408 | to_type = R_386_TLS_LE_32; | |
1409 | else if (from_type != R_386_TLS_IE | |
1410 | && from_type != R_386_TLS_GOTIE) | |
1411 | to_type = R_386_TLS_IE_32; | |
1412 | } | |
1413 | ||
1414 | /* When we are called from elf_i386_relocate_section, CONTENTS | |
1415 | isn't NULL and there may be additional transitions based on | |
1416 | TLS_TYPE. */ | |
1417 | if (contents != NULL) | |
1418 | { | |
1419 | unsigned int new_to_type = to_type; | |
1420 | ||
0e1862bb | 1421 | if (bfd_link_executable (info) |
142411ca L |
1422 | && h != NULL |
1423 | && h->dynindx == -1 | |
1424 | && (tls_type & GOT_TLS_IE)) | |
1425 | new_to_type = R_386_TLS_LE_32; | |
1426 | ||
1427 | if (to_type == R_386_TLS_GD | |
1428 | || to_type == R_386_TLS_GOTDESC | |
1429 | || to_type == R_386_TLS_DESC_CALL) | |
1430 | { | |
1431 | if (tls_type == GOT_TLS_IE_POS) | |
1432 | new_to_type = R_386_TLS_GOTIE; | |
1433 | else if (tls_type & GOT_TLS_IE) | |
1434 | new_to_type = R_386_TLS_IE_32; | |
1435 | } | |
1436 | ||
1437 | /* We checked the transition before when we were called from | |
1438 | elf_i386_check_relocs. We only want to check the new | |
1439 | transition which hasn't been checked before. */ | |
1440 | check = new_to_type != to_type && from_type == to_type; | |
1441 | to_type = new_to_type; | |
1442 | } | |
1443 | ||
1444 | break; | |
1445 | ||
13ae64f3 | 1446 | case R_386_TLS_LDM: |
0e1862bb | 1447 | if (bfd_link_executable (info)) |
142411ca L |
1448 | to_type = R_386_TLS_LE_32; |
1449 | break; | |
1450 | ||
1451 | default: | |
1452 | return TRUE; | |
1453 | } | |
1454 | ||
1455 | /* Return TRUE if there is no transition. */ | |
1456 | if (from_type == to_type) | |
1457 | return TRUE; | |
1458 | ||
1459 | /* Check if the transition can be performed. */ | |
1460 | if (check | |
1461 | && ! elf_i386_check_tls_transition (abfd, sec, contents, | |
1462 | symtab_hdr, sym_hashes, | |
1463 | from_type, rel, relend)) | |
1464 | { | |
2f629d23 | 1465 | reloc_howto_type *from, *to; |
4c544807 | 1466 | const char *name; |
142411ca L |
1467 | |
1468 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1469 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1470 | ||
4c544807 L |
1471 | if (h) |
1472 | name = h->root.root.string; | |
1473 | else | |
1474 | { | |
4c544807 | 1475 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1476 | |
4c544807 | 1477 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1478 | if (htab == NULL) |
1479 | name = "*unknown*"; | |
1480 | else | |
1481 | { | |
1482 | Elf_Internal_Sym *isym; | |
1483 | ||
1484 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1485 | abfd, r_symndx); | |
1486 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1487 | } | |
4c544807 L |
1488 | } |
1489 | ||
142411ca L |
1490 | (*_bfd_error_handler) |
1491 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1492 | "in section `%A' failed"), | |
4c544807 | 1493 | abfd, sec, from->name, to->name, name, |
142411ca L |
1494 | (unsigned long) rel->r_offset); |
1495 | bfd_set_error (bfd_error_bad_value); | |
1496 | return FALSE; | |
13ae64f3 JJ |
1497 | } |
1498 | ||
142411ca L |
1499 | *r_type = to_type; |
1500 | return TRUE; | |
13ae64f3 JJ |
1501 | } |
1502 | ||
c1d11331 L |
1503 | /* Rename some of the generic section flags to better document how they |
1504 | are used here. */ | |
02a86693 | 1505 | #define need_convert_load sec_flg0 |
c1d11331 | 1506 | |
252b5132 | 1507 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1508 | calculate needed space in the global offset table, procedure linkage |
1509 | table, and dynamic reloc sections. */ | |
252b5132 | 1510 | |
b34976b6 | 1511 | static bfd_boolean |
55fd94b0 AM |
1512 | elf_i386_check_relocs (bfd *abfd, |
1513 | struct bfd_link_info *info, | |
1514 | asection *sec, | |
1515 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1516 | { |
6725bdbf | 1517 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1518 | Elf_Internal_Shdr *symtab_hdr; |
1519 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1520 | const Elf_Internal_Rela *rel; |
1521 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1522 | asection *sreloc; |
dd7e64d4 | 1523 | bfd_boolean use_plt_got; |
252b5132 | 1524 | |
0e1862bb | 1525 | if (bfd_link_relocatable (info)) |
b34976b6 | 1526 | return TRUE; |
252b5132 | 1527 | |
0ffa91dd NC |
1528 | BFD_ASSERT (is_i386_elf (abfd)); |
1529 | ||
6725bdbf | 1530 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1531 | if (htab == NULL) |
1532 | return FALSE; | |
1533 | ||
dd7e64d4 L |
1534 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1535 | && (get_elf_i386_backend_data (abfd) | |
1536 | == &elf_i386_arch_bed)); | |
1537 | ||
0ffa91dd | 1538 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1539 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1540 | |
252b5132 RH |
1541 | sreloc = NULL; |
1542 | ||
1543 | rel_end = relocs + sec->reloc_count; | |
1544 | for (rel = relocs; rel < rel_end; rel++) | |
1545 | { | |
13ae64f3 | 1546 | unsigned int r_type; |
252b5132 RH |
1547 | unsigned long r_symndx; |
1548 | struct elf_link_hash_entry *h; | |
d5597ebc | 1549 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1550 | Elf_Internal_Sym *isym; |
1551 | const char *name; | |
06a6a421 | 1552 | bfd_boolean size_reloc; |
252b5132 RH |
1553 | |
1554 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1555 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1556 | |
d9bc7a44 | 1557 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1558 | { |
d003868e AM |
1559 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1560 | abfd, | |
8f615d07 | 1561 | r_symndx); |
b34976b6 | 1562 | return FALSE; |
f5f31454 L |
1563 | } |
1564 | ||
252b5132 | 1565 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1566 | { |
1567 | /* A local symbol. */ | |
c2e61a4e L |
1568 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1569 | abfd, r_symndx); | |
1570 | if (isym == NULL) | |
1571 | return FALSE; | |
c25bc9fc L |
1572 | |
1573 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1574 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1575 | { | |
9fff0c39 | 1576 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1577 | if (h == NULL) |
c2e61a4e | 1578 | return FALSE; |
6bbec505 | 1579 | |
c25bc9fc L |
1580 | /* Fake a STT_GNU_IFUNC symbol. */ |
1581 | h->type = STT_GNU_IFUNC; | |
1582 | h->def_regular = 1; | |
1583 | h->ref_regular = 1; | |
1584 | h->forced_local = 1; | |
1585 | h->root.type = bfd_link_hash_defined; | |
1586 | } | |
1587 | else | |
1588 | h = NULL; | |
1589 | } | |
252b5132 | 1590 | else |
71cb9464 | 1591 | { |
4c544807 | 1592 | isym = NULL; |
71cb9464 L |
1593 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1594 | while (h->root.type == bfd_link_hash_indirect | |
1595 | || h->root.type == bfd_link_hash_warning) | |
1596 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1597 | } |
cbe950e9 | 1598 | |
d5597ebc | 1599 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1600 | if (h != NULL) |
1601 | { | |
cbe950e9 L |
1602 | /* Create the ifunc sections for static executables. If we |
1603 | never see an indirect function symbol nor we are building | |
1604 | a static executable, those sections will be empty and | |
1605 | won't appear in output. */ | |
1606 | switch (r_type) | |
1607 | { | |
1608 | default: | |
1609 | break; | |
1610 | ||
d5597ebc L |
1611 | case R_386_GOTOFF: |
1612 | eh->gotoff_ref = 1; | |
cbe950e9 L |
1613 | case R_386_32: |
1614 | case R_386_PC32: | |
1615 | case R_386_PLT32: | |
1616 | case R_386_GOT32: | |
02a86693 | 1617 | case R_386_GOT32X: |
9d4057ee AM |
1618 | if (htab->elf.dynobj == NULL) |
1619 | htab->elf.dynobj = abfd; | |
1620 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1621 | return FALSE; |
cbe950e9 L |
1622 | break; |
1623 | } | |
1624 | ||
ad1e85de L |
1625 | /* It is referenced by a non-shared object. */ |
1626 | h->ref_regular = 1; | |
61315175 | 1627 | h->root.non_ir_ref = 1; |
13a2df29 L |
1628 | |
1629 | if (h->type == STT_GNU_IFUNC) | |
1630 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1631 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1632 | } |
252b5132 | 1633 | |
142411ca L |
1634 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1635 | symtab_hdr, sym_hashes, | |
1636 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1637 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1638 | return FALSE; |
13ae64f3 JJ |
1639 | |
1640 | switch (r_type) | |
252b5132 | 1641 | { |
37e55690 JJ |
1642 | case R_386_TLS_LDM: |
1643 | htab->tls_ldm_got.refcount += 1; | |
1644 | goto create_got; | |
1645 | ||
1646 | case R_386_PLT32: | |
1647 | /* This symbol requires a procedure linkage table entry. We | |
1648 | actually build the entry in adjust_dynamic_symbol, | |
1649 | because this might be a case of linking PIC code which is | |
1650 | never referenced by a dynamic object, in which case we | |
1651 | don't need to generate a procedure linkage table entry | |
1652 | after all. */ | |
1653 | ||
1654 | /* If this is a local symbol, we resolve it directly without | |
1655 | creating a procedure linkage table entry. */ | |
1656 | if (h == NULL) | |
1657 | continue; | |
1658 | ||
aec6b87e | 1659 | eh->has_got_reloc = 1; |
f5385ebf | 1660 | h->needs_plt = 1; |
37e55690 JJ |
1661 | h->plt.refcount += 1; |
1662 | break; | |
1663 | ||
6a3e1bae | 1664 | case R_386_SIZE32: |
06a6a421 | 1665 | size_reloc = TRUE; |
6a3e1bae L |
1666 | goto do_size; |
1667 | ||
13ae64f3 | 1668 | case R_386_TLS_IE_32: |
37e55690 JJ |
1669 | case R_386_TLS_IE: |
1670 | case R_386_TLS_GOTIE: | |
0e1862bb | 1671 | if (!bfd_link_executable (info)) |
13ae64f3 | 1672 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1673 | /* Fall through */ |
1674 | ||
252b5132 | 1675 | case R_386_GOT32: |
02a86693 | 1676 | case R_386_GOT32X: |
13ae64f3 | 1677 | case R_386_TLS_GD: |
67a4f2b7 AO |
1678 | case R_386_TLS_GOTDESC: |
1679 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1680 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1681 | { |
1682 | int tls_type, old_tls_type; | |
1683 | ||
1684 | switch (r_type) | |
1685 | { | |
1686 | default: | |
02a86693 L |
1687 | case R_386_GOT32: |
1688 | case R_386_GOT32X: | |
1689 | tls_type = GOT_NORMAL; | |
1690 | break; | |
13ae64f3 | 1691 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
1692 | case R_386_TLS_GOTDESC: |
1693 | case R_386_TLS_DESC_CALL: | |
1694 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1695 | case R_386_TLS_IE_32: |
1696 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1697 | tls_type = GOT_TLS_IE_NEG; | |
1698 | else | |
ebcfb3c0 JJ |
1699 | /* If this is a GD->IE transition, we may use either of |
1700 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1701 | tls_type = GOT_TLS_IE; |
1702 | break; | |
1703 | case R_386_TLS_IE: | |
1704 | case R_386_TLS_GOTIE: | |
1705 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1706 | } |
1707 | ||
1708 | if (h != NULL) | |
1709 | { | |
1710 | h->got.refcount += 1; | |
1711 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1712 | } | |
1713 | else | |
1714 | { | |
1715 | bfd_signed_vma *local_got_refcounts; | |
1716 | ||
1717 | /* This is a global offset table entry for a local symbol. */ | |
1718 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1719 | if (local_got_refcounts == NULL) | |
1720 | { | |
1721 | bfd_size_type size; | |
1722 | ||
1723 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1724 | size *= (sizeof (bfd_signed_vma) |
1725 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1726 | local_got_refcounts = (bfd_signed_vma *) |
1727 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1728 | if (local_got_refcounts == NULL) |
c2e61a4e | 1729 | return FALSE; |
13ae64f3 | 1730 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1731 | elf_i386_local_tlsdesc_gotent (abfd) |
1732 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1733 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1734 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1735 | } |
1736 | local_got_refcounts[r_symndx] += 1; | |
1737 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1738 | } | |
1739 | ||
37e55690 JJ |
1740 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1741 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1742 | /* If a TLS symbol is accessed using IE at least once, |
1743 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1744 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1745 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1746 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1747 | { |
67a4f2b7 | 1748 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1749 | tls_type = old_tls_type; |
67a4f2b7 AO |
1750 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1751 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1752 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1753 | else |
1754 | { | |
09a24cbf | 1755 | if (h) |
4c544807 L |
1756 | name = h->root.root.string; |
1757 | else | |
1758 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1759 | NULL); | |
13ae64f3 | 1760 | (*_bfd_error_handler) |
d003868e | 1761 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1762 | "thread local symbol"), |
4c544807 | 1763 | abfd, name); |
68c4a57e | 1764 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1765 | return FALSE; |
13ae64f3 JJ |
1766 | } |
1767 | } | |
1768 | ||
1769 | if (old_tls_type != tls_type) | |
1770 | { | |
1771 | if (h != NULL) | |
1772 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1773 | else | |
1774 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1775 | } | |
1776 | } | |
0ac8d2ca AM |
1777 | /* Fall through */ |
1778 | ||
1779 | case R_386_GOTOFF: | |
1780 | case R_386_GOTPC: | |
13ae64f3 | 1781 | create_got: |
6de2ae4a | 1782 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
1783 | { |
1784 | if (htab->elf.dynobj == NULL) | |
1785 | htab->elf.dynobj = abfd; | |
6de2ae4a | 1786 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c2e61a4e | 1787 | return FALSE; |
0ac8d2ca | 1788 | } |
37e55690 | 1789 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
1790 | { |
1791 | if (eh != NULL) | |
1792 | eh->has_got_reloc = 1; | |
1793 | break; | |
1794 | } | |
37e55690 | 1795 | /* Fall through */ |
252b5132 | 1796 | |
37e55690 JJ |
1797 | case R_386_TLS_LE_32: |
1798 | case R_386_TLS_LE: | |
aec6b87e L |
1799 | if (eh != NULL) |
1800 | eh->has_got_reloc = 1; | |
0e1862bb | 1801 | if (bfd_link_executable (info)) |
37e55690 | 1802 | break; |
bffbf940 | 1803 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 1804 | goto do_relocation; |
252b5132 RH |
1805 | |
1806 | case R_386_32: | |
1807 | case R_386_PC32: | |
aec6b87e L |
1808 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
1809 | eh->has_non_got_reloc = 1; | |
1810 | do_relocation: | |
d1ed1c7d L |
1811 | /* STT_GNU_IFUNC symbol must go through PLT even if it is |
1812 | locally defined and undefined symbol may turn out to be | |
1813 | a STT_GNU_IFUNC symbol later. */ | |
1814 | if (h != NULL | |
1815 | && (bfd_link_executable (info) | |
1816 | || ((h->type == STT_GNU_IFUNC | |
1817 | || h->root.type == bfd_link_hash_undefweak | |
1818 | || h->root.type == bfd_link_hash_undefined) | |
1819 | && SYMBOLIC_BIND (info, h)))) | |
6725bdbf | 1820 | { |
12d0ee4a | 1821 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1822 | need a copy reloc. We can't check reliably at this |
1823 | stage whether the section is read-only, as input | |
1824 | sections have not yet been mapped to output sections. | |
1825 | Tentatively set the flag for now, and correct in | |
1826 | adjust_dynamic_symbol. */ | |
f5385ebf | 1827 | h->non_got_ref = 1; |
12d0ee4a AM |
1828 | |
1829 | /* We may need a .plt entry if the function this reloc | |
1830 | refers to is in a shared lib. */ | |
51b64d56 | 1831 | h->plt.refcount += 1; |
4b627c18 L |
1832 | if (r_type == R_386_PC32) |
1833 | { | |
1834 | /* Since something like ".long foo - ." may be used | |
1835 | as pointer, make sure that PLT is used if foo is | |
1836 | a function defined in a shared library. */ | |
1837 | if ((sec->flags & SEC_CODE) == 0) | |
1838 | h->pointer_equality_needed = 1; | |
1839 | } | |
1840 | else | |
04ebc307 L |
1841 | { |
1842 | h->pointer_equality_needed = 1; | |
1843 | /* R_386_32 can be resolved at run-time. */ | |
1844 | if (r_type == R_386_32 | |
1845 | && (sec->flags & SEC_READONLY) == 0) | |
1846 | eh->func_pointer_refcount += 1; | |
1847 | } | |
6725bdbf | 1848 | } |
7843f00e | 1849 | |
06a6a421 | 1850 | size_reloc = FALSE; |
6a3e1bae | 1851 | do_size: |
252b5132 | 1852 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1853 | against a global symbol, or a non PC relative reloc |
1854 | against a local symbol, then we need to copy the reloc | |
1855 | into the shared library. However, if we are linking with | |
1856 | -Bsymbolic, we do not need to copy a reloc against a | |
1857 | global symbol which is defined in an object we are | |
1858 | including in the link (i.e., DEF_REGULAR is set). At | |
1859 | this point we have not seen all the input files, so it is | |
1860 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1861 | later (it is never cleared). In case of a weak definition, |
1862 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1863 | a shared library. We account for that possibility below by |
1f655a09 L |
1864 | storing information in the relocs_copied field of the hash |
1865 | table entry. A similar situation occurs when creating | |
1866 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1867 | symbol local. |
56882138 | 1868 | |
12d0ee4a AM |
1869 | If on the other hand, we are creating an executable, we |
1870 | may need to keep relocations for symbols satisfied by a | |
1871 | dynamic library if we manage to avoid copy relocs for the | |
1872 | symbol. */ | |
0e1862bb | 1873 | if ((bfd_link_pic (info) |
12d0ee4a | 1874 | && (sec->flags & SEC_ALLOC) != 0 |
13ae64f3 | 1875 | && (r_type != R_386_PC32 |
12d0ee4a | 1876 | || (h != NULL |
4e0c91e4 L |
1877 | && (! (bfd_link_pie (info) |
1878 | || SYMBOLIC_BIND (info, h)) | |
12d0ee4a | 1879 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1880 | || !h->def_regular)))) |
a23b6845 | 1881 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 1882 | && !bfd_link_pic (info) |
12d0ee4a AM |
1883 | && (sec->flags & SEC_ALLOC) != 0 |
1884 | && h != NULL | |
12d0ee4a | 1885 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1886 | || !h->def_regular))) |
252b5132 | 1887 | { |
e03a8ed8 L |
1888 | struct elf_dyn_relocs *p; |
1889 | struct elf_dyn_relocs **head; | |
ec338859 | 1890 | |
12d0ee4a AM |
1891 | /* We must copy these reloc types into the output file. |
1892 | Create a reloc section in dynobj and make room for | |
1893 | this reloc. */ | |
252b5132 RH |
1894 | if (sreloc == NULL) |
1895 | { | |
0ac8d2ca AM |
1896 | if (htab->elf.dynobj == NULL) |
1897 | htab->elf.dynobj = abfd; | |
1898 | ||
83bac4b0 NC |
1899 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1900 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1901 | ||
252b5132 | 1902 | if (sreloc == NULL) |
c2e61a4e | 1903 | return FALSE; |
252b5132 RH |
1904 | } |
1905 | ||
0c715baa AM |
1906 | /* If this is a global symbol, we count the number of |
1907 | relocations we need for this symbol. */ | |
1908 | if (h != NULL) | |
252b5132 | 1909 | { |
d5597ebc | 1910 | head = &eh->dyn_relocs; |
0c715baa AM |
1911 | } |
1912 | else | |
1913 | { | |
ec338859 AM |
1914 | /* Track dynamic relocs needed for local syms too. |
1915 | We really need local syms available to do this | |
1916 | easily. Oh well. */ | |
87d72d41 | 1917 | void **vpp; |
ec338859 | 1918 | asection *s; |
87d72d41 AM |
1919 | |
1920 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1921 | abfd, r_symndx); | |
1922 | if (isym == NULL) | |
1923 | return FALSE; | |
1924 | ||
1925 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1926 | if (s == NULL) |
87d72d41 | 1927 | s = sec; |
ec338859 | 1928 | |
e81d3500 | 1929 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1930 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1931 | } |
1932 | ||
1933 | p = *head; | |
1934 | if (p == NULL || p->sec != sec) | |
1935 | { | |
1936 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1937 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1938 | amt); | |
ec338859 | 1939 | if (p == NULL) |
c2e61a4e | 1940 | return FALSE; |
ec338859 AM |
1941 | p->next = *head; |
1942 | *head = p; | |
1943 | p->sec = sec; | |
1944 | p->count = 0; | |
1945 | p->pc_count = 0; | |
252b5132 | 1946 | } |
ec338859 AM |
1947 | |
1948 | p->count += 1; | |
06a6a421 L |
1949 | /* Count size relocation as PC-relative relocation. */ |
1950 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1951 | p->pc_count += 1; |
252b5132 | 1952 | } |
252b5132 RH |
1953 | break; |
1954 | ||
1955 | /* This relocation describes the C++ object vtable hierarchy. | |
1956 | Reconstruct it for later use during GC. */ | |
1957 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1958 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1959 | return FALSE; |
252b5132 RH |
1960 | break; |
1961 | ||
1962 | /* This relocation describes which C++ vtable entries are actually | |
1963 | used. Record for later use during GC. */ | |
1964 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1965 | BFD_ASSERT (h != NULL); |
1966 | if (h != NULL | |
1967 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c2e61a4e | 1968 | return FALSE; |
252b5132 RH |
1969 | break; |
1970 | ||
1971 | default: | |
1972 | break; | |
1973 | } | |
dd7e64d4 L |
1974 | |
1975 | if (use_plt_got | |
1976 | && h != NULL | |
1977 | && h->plt.refcount > 0 | |
8ded2ddc L |
1978 | && (((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
1979 | || h->got.refcount > 0) | |
dd7e64d4 L |
1980 | && htab->plt_got == NULL) |
1981 | { | |
1982 | /* Create the GOT procedure linkage table. */ | |
1983 | unsigned int plt_got_align; | |
1984 | const struct elf_backend_data *bed; | |
1985 | ||
1986 | bed = get_elf_backend_data (info->output_bfd); | |
1987 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
1988 | && (sizeof (elf_i386_got_plt_entry) | |
1989 | == sizeof (elf_i386_pic_got_plt_entry))); | |
1990 | plt_got_align = 3; | |
1991 | ||
1992 | if (htab->elf.dynobj == NULL) | |
1993 | htab->elf.dynobj = abfd; | |
1994 | htab->plt_got | |
1995 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1996 | ".plt.got", | |
1997 | (bed->dynamic_sec_flags | |
1998 | | SEC_ALLOC | |
1999 | | SEC_CODE | |
2000 | | SEC_LOAD | |
2001 | | SEC_READONLY)); | |
2002 | if (htab->plt_got == NULL | |
2003 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
2004 | htab->plt_got, | |
2005 | plt_got_align)) | |
2006 | return FALSE; | |
2007 | } | |
c1d11331 | 2008 | |
02a86693 | 2009 | if ((r_type == R_386_GOT32 || r_type == R_386_GOT32X) |
c1d11331 | 2010 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 2011 | sec->need_convert_load = 1; |
252b5132 RH |
2012 | } |
2013 | ||
b34976b6 | 2014 | return TRUE; |
252b5132 RH |
2015 | } |
2016 | ||
2017 | /* Return the section that should be marked against GC for a given | |
2018 | relocation. */ | |
2019 | ||
2020 | static asection * | |
55fd94b0 | 2021 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 2022 | struct bfd_link_info *info, |
55fd94b0 AM |
2023 | Elf_Internal_Rela *rel, |
2024 | struct elf_link_hash_entry *h, | |
2025 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2026 | { |
2027 | if (h != NULL) | |
07adf181 AM |
2028 | switch (ELF32_R_TYPE (rel->r_info)) |
2029 | { | |
2030 | case R_386_GNU_VTINHERIT: | |
2031 | case R_386_GNU_VTENTRY: | |
2032 | return NULL; | |
2033 | } | |
2034 | ||
2035 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2036 | } |
2037 | ||
2038 | /* Update the got entry reference counts for the section being removed. */ | |
2039 | ||
b34976b6 | 2040 | static bfd_boolean |
55fd94b0 AM |
2041 | elf_i386_gc_sweep_hook (bfd *abfd, |
2042 | struct bfd_link_info *info, | |
2043 | asection *sec, | |
2044 | const Elf_Internal_Rela *relocs) | |
252b5132 | 2045 | { |
4dfe6ac6 | 2046 | struct elf_i386_link_hash_table *htab; |
dd5724d5 AM |
2047 | Elf_Internal_Shdr *symtab_hdr; |
2048 | struct elf_link_hash_entry **sym_hashes; | |
2049 | bfd_signed_vma *local_got_refcounts; | |
2050 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 2051 | |
0e1862bb | 2052 | if (bfd_link_relocatable (info)) |
7dda2462 TG |
2053 | return TRUE; |
2054 | ||
4dfe6ac6 NC |
2055 | htab = elf_i386_hash_table (info); |
2056 | if (htab == NULL) | |
2057 | return FALSE; | |
2058 | ||
ec338859 | 2059 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 2060 | |
0ffa91dd | 2061 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
2062 | sym_hashes = elf_sym_hashes (abfd); |
2063 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
2064 | |
2065 | relend = relocs + sec->reloc_count; | |
2066 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
2067 | { |
2068 | unsigned long r_symndx; | |
2069 | unsigned int r_type; | |
2070 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 2071 | |
26e41594 AM |
2072 | r_symndx = ELF32_R_SYM (rel->r_info); |
2073 | if (r_symndx >= symtab_hdr->sh_info) | |
2074 | { | |
26e41594 | 2075 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
2076 | while (h->root.type == bfd_link_hash_indirect |
2077 | || h->root.type == bfd_link_hash_warning) | |
2078 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 2079 | } |
bb1cb422 L |
2080 | else |
2081 | { | |
2082 | /* A local symbol. */ | |
2083 | Elf_Internal_Sym *isym; | |
2084 | ||
2085 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2086 | abfd, r_symndx); | |
2087 | ||
2088 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
2089 | if (isym != NULL | |
2090 | && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
2091 | { | |
2092 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE); | |
2093 | if (h == NULL) | |
2094 | abort (); | |
2095 | } | |
2096 | } | |
0c715baa | 2097 | |
3db2e7dd L |
2098 | if (h) |
2099 | { | |
2100 | struct elf_i386_link_hash_entry *eh; | |
2101 | struct elf_dyn_relocs **pp; | |
2102 | struct elf_dyn_relocs *p; | |
2103 | ||
2104 | eh = (struct elf_i386_link_hash_entry *) h; | |
2105 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2106 | if (p->sec == sec) | |
2107 | { | |
2108 | /* Everything must go for SEC. */ | |
2109 | *pp = p->next; | |
2110 | break; | |
2111 | } | |
2112 | } | |
2113 | ||
26e41594 | 2114 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
2115 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
2116 | symtab_hdr, sym_hashes, | |
2117 | &r_type, GOT_UNKNOWN, | |
23209a78 | 2118 | rel, relend, h, r_symndx)) |
142411ca L |
2119 | return FALSE; |
2120 | ||
26e41594 AM |
2121 | switch (r_type) |
2122 | { | |
2123 | case R_386_TLS_LDM: | |
4dfe6ac6 NC |
2124 | if (htab->tls_ldm_got.refcount > 0) |
2125 | htab->tls_ldm_got.refcount -= 1; | |
26e41594 | 2126 | break; |
0c715baa | 2127 | |
26e41594 | 2128 | case R_386_TLS_GD: |
67a4f2b7 AO |
2129 | case R_386_TLS_GOTDESC: |
2130 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
2131 | case R_386_TLS_IE_32: |
2132 | case R_386_TLS_IE: | |
2133 | case R_386_TLS_GOTIE: | |
2134 | case R_386_GOT32: | |
02a86693 | 2135 | case R_386_GOT32X: |
26e41594 AM |
2136 | if (h != NULL) |
2137 | { | |
2138 | if (h->got.refcount > 0) | |
2139 | h->got.refcount -= 1; | |
bb1cb422 L |
2140 | if (h->type == STT_GNU_IFUNC) |
2141 | { | |
2142 | if (h->plt.refcount > 0) | |
2143 | h->plt.refcount -= 1; | |
2144 | } | |
26e41594 AM |
2145 | } |
2146 | else if (local_got_refcounts != NULL) | |
2147 | { | |
2148 | if (local_got_refcounts[r_symndx] > 0) | |
2149 | local_got_refcounts[r_symndx] -= 1; | |
2150 | } | |
2151 | break; | |
0c715baa | 2152 | |
26e41594 AM |
2153 | case R_386_32: |
2154 | case R_386_PC32: | |
1788fc08 | 2155 | case R_386_SIZE32: |
0e1862bb | 2156 | if (bfd_link_pic (info) |
3db2e7dd | 2157 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
26e41594 AM |
2158 | break; |
2159 | /* Fall through */ | |
6725bdbf | 2160 | |
26e41594 AM |
2161 | case R_386_PLT32: |
2162 | if (h != NULL) | |
2163 | { | |
2164 | if (h->plt.refcount > 0) | |
2165 | h->plt.refcount -= 1; | |
04ebc307 L |
2166 | if (r_type == R_386_32 |
2167 | && (sec->flags & SEC_READONLY) == 0) | |
2168 | { | |
2169 | struct elf_i386_link_hash_entry *eh | |
2170 | = (struct elf_i386_link_hash_entry *) h; | |
2171 | if (eh->func_pointer_refcount > 0) | |
2172 | eh->func_pointer_refcount -= 1; | |
2173 | } | |
26e41594 AM |
2174 | } |
2175 | break; | |
dd5724d5 | 2176 | |
bb1cb422 L |
2177 | case R_386_GOTOFF: |
2178 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2179 | { | |
2180 | if (h->got.refcount > 0) | |
2181 | h->got.refcount -= 1; | |
2182 | if (h->plt.refcount > 0) | |
2183 | h->plt.refcount -= 1; | |
2184 | } | |
2185 | break; | |
2186 | ||
26e41594 AM |
2187 | default: |
2188 | break; | |
2189 | } | |
2190 | } | |
252b5132 | 2191 | |
b34976b6 | 2192 | return TRUE; |
252b5132 RH |
2193 | } |
2194 | ||
aec6b87e L |
2195 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2196 | is resolved to 0. */ | |
2197 | ||
2198 | static bfd_boolean | |
2199 | elf_i386_fixup_symbol (struct bfd_link_info *info, | |
2200 | struct elf_link_hash_entry *h) | |
2201 | { | |
2202 | if (h->dynindx != -1 | |
2203 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
2204 | elf_i386_hash_entry (h))) | |
2205 | { | |
2206 | h->dynindx = -1; | |
2207 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2208 | h->dynstr_index); | |
2209 | } | |
2210 | return TRUE; | |
2211 | } | |
2212 | ||
252b5132 RH |
2213 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2214 | regular object. The current definition is in some section of the | |
2215 | dynamic object, but we're not including those sections. We have to | |
2216 | change the definition to something the rest of the link can | |
2217 | understand. */ | |
2218 | ||
b34976b6 | 2219 | static bfd_boolean |
55fd94b0 AM |
2220 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2221 | struct elf_link_hash_entry *h) | |
252b5132 | 2222 | { |
6725bdbf | 2223 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2224 | asection *s; |
5ca5bb35 L |
2225 | struct elf_i386_link_hash_entry *eh; |
2226 | struct elf_dyn_relocs *p; | |
252b5132 | 2227 | |
cbe950e9 L |
2228 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2229 | if (h->type == STT_GNU_IFUNC) | |
2230 | { | |
73bcf233 L |
2231 | /* All local STT_GNU_IFUNC references must be treate as local |
2232 | calls via local PLT. */ | |
5ca5bb35 L |
2233 | if (h->ref_regular |
2234 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2235 | { | |
73bcf233 | 2236 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2237 | struct elf_dyn_relocs **pp; |
2238 | ||
2239 | eh = (struct elf_i386_link_hash_entry *) h; | |
2240 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2241 | { | |
2242 | pc_count += p->pc_count; | |
2243 | p->count -= p->pc_count; | |
2244 | p->pc_count = 0; | |
73bcf233 | 2245 | count += p->count; |
5ca5bb35 L |
2246 | if (p->count == 0) |
2247 | *pp = p->next; | |
2248 | else | |
2249 | pp = &p->next; | |
2250 | } | |
2251 | ||
73bcf233 | 2252 | if (pc_count || count) |
5ca5bb35 L |
2253 | { |
2254 | h->needs_plt = 1; | |
5ca5bb35 | 2255 | h->non_got_ref = 1; |
a5479e5f L |
2256 | if (h->plt.refcount <= 0) |
2257 | h->plt.refcount = 1; | |
2258 | else | |
2259 | h->plt.refcount += 1; | |
5ca5bb35 L |
2260 | } |
2261 | } | |
2262 | ||
cbe950e9 L |
2263 | if (h->plt.refcount <= 0) |
2264 | { | |
2265 | h->plt.offset = (bfd_vma) -1; | |
2266 | h->needs_plt = 0; | |
2267 | } | |
2268 | return TRUE; | |
2269 | } | |
2270 | ||
252b5132 RH |
2271 | /* If this is a function, put it in the procedure linkage table. We |
2272 | will fill in the contents of the procedure linkage table later, | |
2273 | when we know the address of the .got section. */ | |
2274 | if (h->type == STT_FUNC | |
f5385ebf | 2275 | || h->needs_plt) |
252b5132 | 2276 | { |
6725bdbf | 2277 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2278 | || SYMBOL_CALLS_LOCAL (info, h) |
2279 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2280 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2281 | { |
2282 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2283 | file, but the symbol was never referred to by a dynamic |
2284 | object, or if all references were garbage collected. In | |
2285 | such a case, we don't actually need to build a procedure | |
2286 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2287 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2288 | h->needs_plt = 0; |
252b5132 RH |
2289 | } |
2290 | ||
b34976b6 | 2291 | return TRUE; |
252b5132 | 2292 | } |
6725bdbf AM |
2293 | else |
2294 | /* It's possible that we incorrectly decided a .plt reloc was | |
2295 | needed for an R_386_PC32 reloc to a non-function sym in | |
2296 | check_relocs. We can't decide accurately between function and | |
2297 | non-function syms in check-relocs; Objects loaded later in | |
2298 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2299 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2300 | |
2301 | /* If this is a weak symbol, and there is a real definition, the | |
2302 | processor independent code will have arranged for us to see the | |
2303 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2304 | if (h->u.weakdef != NULL) |
252b5132 | 2305 | { |
f6e332e6 AM |
2306 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2307 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2308 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2309 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2310 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2311 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2312 | return TRUE; |
252b5132 RH |
2313 | } |
2314 | ||
2315 | /* This is a reference to a symbol defined by a dynamic object which | |
2316 | is not a function. */ | |
2317 | ||
2318 | /* If we are creating a shared library, we must presume that the | |
2319 | only references to the symbol are via the global offset table. | |
2320 | For such cases we need not do anything here; the relocations will | |
2321 | be handled correctly by relocate_section. */ | |
0e1862bb | 2322 | if (!bfd_link_executable (info)) |
b34976b6 | 2323 | return TRUE; |
252b5132 | 2324 | |
7843f00e | 2325 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2326 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2327 | reloc. */ | |
2328 | eh = (struct elf_i386_link_hash_entry *) h; | |
2329 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2330 | return TRUE; |
7843f00e | 2331 | |
8bd621d8 AM |
2332 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2333 | if (info->nocopyreloc) | |
2334 | { | |
f5385ebf | 2335 | h->non_got_ref = 0; |
b34976b6 | 2336 | return TRUE; |
8bd621d8 AM |
2337 | } |
2338 | ||
643796e3 | 2339 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2340 | if (htab == NULL) |
2341 | return FALSE; | |
643796e3 | 2342 | |
d5597ebc L |
2343 | /* If there aren't any dynamic relocs in read-only sections nor |
2344 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2345 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2346 | not have dynamic relocations (other than copy and jump slot | |
2347 | relocations) in an executable. */ | |
23209a78 | 2348 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2349 | && !eh->gotoff_ref |
23209a78 | 2350 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
ebe50bae | 2351 | { |
a23b6845 AM |
2352 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2353 | { | |
2354 | s = p->sec->output_section; | |
2355 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2356 | break; | |
2357 | } | |
2358 | ||
a23b6845 AM |
2359 | if (p == NULL) |
2360 | { | |
f5385ebf | 2361 | h->non_got_ref = 0; |
a23b6845 AM |
2362 | return TRUE; |
2363 | } | |
ebe50bae AM |
2364 | } |
2365 | ||
252b5132 RH |
2366 | /* We must allocate the symbol in our .dynbss section, which will |
2367 | become part of the .bss section of the executable. There will be | |
2368 | an entry for this symbol in the .dynsym section. The dynamic | |
2369 | object will contain position independent code, so all references | |
2370 | from the dynamic object to this symbol will go through the global | |
2371 | offset table. The dynamic linker will use the .dynsym entry to | |
2372 | determine the address it must put in the global offset table, so | |
2373 | both the dynamic object and the regular object will refer to the | |
2374 | same memory location for the variable. */ | |
2375 | ||
252b5132 RH |
2376 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2377 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2378 | runtime process image. */ |
1d7e9d18 | 2379 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2380 | { |
eea6121a | 2381 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2382 | h->needs_copy = 1; |
252b5132 RH |
2383 | } |
2384 | ||
0ac8d2ca | 2385 | s = htab->sdynbss; |
252b5132 | 2386 | |
6cabe1ea | 2387 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2388 | } |
2389 | ||
6725bdbf | 2390 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2391 | dynamic relocs. */ |
6725bdbf | 2392 | |
b34976b6 | 2393 | static bfd_boolean |
eb4ff4d6 | 2394 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2395 | { |
2396 | struct bfd_link_info *info; | |
2397 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2398 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2399 | struct elf_dyn_relocs *p; |
25e762b9 | 2400 | unsigned plt_entry_size; |
aec6b87e | 2401 | bfd_boolean resolved_to_zero; |
6725bdbf | 2402 | |
e92d460e | 2403 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2404 | return TRUE; |
6725bdbf | 2405 | |
cbe950e9 | 2406 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2407 | |
6725bdbf AM |
2408 | info = (struct bfd_link_info *) inf; |
2409 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2410 | if (htab == NULL) |
2411 | return FALSE; | |
6725bdbf | 2412 | |
25e762b9 RM |
2413 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2414 | ||
aec6b87e L |
2415 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); |
2416 | ||
04ebc307 L |
2417 | /* Clear the reference count of function pointer relocations if |
2418 | symbol isn't a normal function. */ | |
2419 | if (h->type != STT_FUNC) | |
2420 | eh->func_pointer_refcount = 0; | |
2421 | ||
dd7e64d4 L |
2422 | /* We can't use the GOT PLT if pointer equality is needed since |
2423 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2424 | linker won't update the GOT slot. We will get into an infinite | |
2425 | loop at run-time. */ | |
2426 | if (htab->plt_got != NULL | |
2427 | && h->type != STT_GNU_IFUNC | |
2428 | && !h->pointer_equality_needed | |
2429 | && h->plt.refcount > 0 | |
2430 | && h->got.refcount > 0) | |
2431 | { | |
2432 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2433 | reloctions. */ | |
2434 | h->plt.offset = (bfd_vma) -1; | |
2435 | ||
2436 | /* Use the GOT PLT. */ | |
2437 | eh->plt_got.refcount = 1; | |
2438 | } | |
2439 | ||
cbe950e9 L |
2440 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2441 | here if it is defined and referenced in a non-shared object. */ | |
2442 | if (h->type == STT_GNU_IFUNC | |
2443 | && h->def_regular) | |
25e762b9 | 2444 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
7b70956d WN |
2445 | plt_entry_size, |
2446 | plt_entry_size, 4); | |
04ebc307 L |
2447 | /* Don't create the PLT entry if there are only function pointer |
2448 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2449 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2450 | && (h->plt.refcount > eh->func_pointer_refcount |
2451 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2452 | { |
25070364 L |
2453 | bfd_boolean use_plt_got; |
2454 | ||
04ebc307 L |
2455 | /* Clear the reference count of function pointer relocations |
2456 | if PLT is used. */ | |
2457 | eh->func_pointer_refcount = 0; | |
2458 | ||
8ded2ddc | 2459 | if ((info->flags & DF_BIND_NOW) && !h->pointer_equality_needed) |
25070364 L |
2460 | { |
2461 | /* Don't use the regular PLT for DF_BIND_NOW. */ | |
2462 | h->plt.offset = (bfd_vma) -1; | |
2463 | ||
2464 | /* Use the GOT PLT. */ | |
2465 | h->got.refcount = 1; | |
2466 | eh->plt_got.refcount = 1; | |
2467 | } | |
2468 | ||
2469 | use_plt_got = eh->plt_got.refcount > 0; | |
dd7e64d4 | 2470 | |
5a15f56f AM |
2471 | /* Make sure this symbol is output as a dynamic symbol. |
2472 | Undefined weak syms won't yet be marked as dynamic. */ | |
2473 | if (h->dynindx == -1 | |
aec6b87e L |
2474 | && !h->forced_local |
2475 | && !resolved_to_zero) | |
5a15f56f | 2476 | { |
c152c796 | 2477 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2478 | return FALSE; |
5a15f56f AM |
2479 | } |
2480 | ||
0e1862bb | 2481 | if (bfd_link_pic (info) |
4e795f50 | 2482 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2483 | { |
6de2ae4a | 2484 | asection *s = htab->elf.splt; |
dd7e64d4 | 2485 | asection *got_s = htab->plt_got; |
6725bdbf | 2486 | |
7c1e8d3e L |
2487 | /* If this is the first .plt entry, make room for the special |
2488 | first entry. The .plt section is used by prelink to undo | |
2489 | prelinking for dynamic relocations. */ | |
2490 | if (s->size == 0) | |
2491 | s->size = plt_entry_size; | |
2492 | ||
dd7e64d4 L |
2493 | if (use_plt_got) |
2494 | eh->plt_got.offset = got_s->size; | |
2495 | else | |
7c1e8d3e | 2496 | h->plt.offset = s->size; |
6725bdbf | 2497 | |
ced53ee5 AM |
2498 | /* If this symbol is not defined in a regular file, and we are |
2499 | not generating a shared library, then set the symbol to this | |
2500 | location in the .plt. This is required to make function | |
2501 | pointers compare as equal between the normal executable and | |
2502 | the shared library. */ | |
0e1862bb | 2503 | if (! bfd_link_pic (info) |
f5385ebf | 2504 | && !h->def_regular) |
ced53ee5 | 2505 | { |
dd7e64d4 L |
2506 | if (use_plt_got) |
2507 | { | |
2508 | /* We need to make a call to the entry of the GOT PLT | |
2509 | instead of regular PLT entry. */ | |
2510 | h->root.u.def.section = got_s; | |
2511 | h->root.u.def.value = eh->plt_got.offset; | |
2512 | } | |
2513 | else | |
2514 | { | |
2515 | h->root.u.def.section = s; | |
2516 | h->root.u.def.value = h->plt.offset; | |
2517 | } | |
ced53ee5 | 2518 | } |
6725bdbf | 2519 | |
ced53ee5 | 2520 | /* Make room for this entry. */ |
dd7e64d4 L |
2521 | if (use_plt_got) |
2522 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2523 | else | |
2524 | { | |
2525 | s->size += plt_entry_size; | |
6725bdbf | 2526 | |
dd7e64d4 L |
2527 | /* We also need to make an entry in the .got.plt section, |
2528 | which will be placed in the .got section by the linker | |
2529 | script. */ | |
2530 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2531 | |
aec6b87e L |
2532 | /* There should be no PLT relocation against resolved |
2533 | undefined weak symbol in executable. */ | |
2534 | if (!resolved_to_zero) | |
2535 | { | |
2536 | /* We also need to make an entry in the .rel.plt | |
2537 | section. */ | |
2538 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2539 | htab->elf.srelplt->reloc_count++; | |
2540 | } | |
dd7e64d4 | 2541 | } |
eac338cf | 2542 | |
23209a78 | 2543 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
0e1862bb | 2544 | && !bfd_link_pic (info)) |
eac338cf PB |
2545 | { |
2546 | /* VxWorks has a second set of relocations for each PLT entry | |
2547 | in executables. They go in a separate relocation section, | |
2548 | which is processed by the kernel loader. */ | |
2549 | ||
2550 | /* There are two relocations for the initial PLT entry: an | |
2551 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2552 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2553 | ||
25e762b9 | 2554 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2555 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2556 | ||
2557 | /* There are two extra relocations for each subsequent PLT entry: | |
2558 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2559 | relocation for the PLT entry. */ | |
2560 | ||
2561 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2562 | } | |
6725bdbf | 2563 | } |
ced53ee5 AM |
2564 | else |
2565 | { | |
13f42277 | 2566 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2567 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2568 | h->needs_plt = 0; |
ced53ee5 | 2569 | } |
6725bdbf AM |
2570 | } |
2571 | else | |
2572 | { | |
13f42277 | 2573 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2574 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2575 | h->needs_plt = 0; |
6725bdbf AM |
2576 | } |
2577 | ||
67a4f2b7 AO |
2578 | eh->tlsdesc_got = (bfd_vma) -1; |
2579 | ||
37e55690 | 2580 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2581 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2582 | if (h->got.refcount > 0 | |
0e1862bb | 2583 | && bfd_link_executable (info) |
13ae64f3 | 2584 | && h->dynindx == -1 |
37e55690 | 2585 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2586 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2587 | else if (h->got.refcount > 0) |
6725bdbf | 2588 | { |
0ac8d2ca | 2589 | asection *s; |
b34976b6 | 2590 | bfd_boolean dyn; |
13ae64f3 | 2591 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2592 | |
5a15f56f AM |
2593 | /* Make sure this symbol is output as a dynamic symbol. |
2594 | Undefined weak syms won't yet be marked as dynamic. */ | |
2595 | if (h->dynindx == -1 | |
aec6b87e L |
2596 | && !h->forced_local |
2597 | && !resolved_to_zero) | |
5a15f56f | 2598 | { |
c152c796 | 2599 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2600 | return FALSE; |
5a15f56f AM |
2601 | } |
2602 | ||
6de2ae4a | 2603 | s = htab->elf.sgot; |
67a4f2b7 AO |
2604 | if (GOT_TLS_GDESC_P (tls_type)) |
2605 | { | |
6de2ae4a | 2606 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2607 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2608 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2609 | h->got.offset = (bfd_vma) -2; |
2610 | } | |
2611 | if (! GOT_TLS_GDESC_P (tls_type) | |
2612 | || GOT_TLS_GD_P (tls_type)) | |
2613 | { | |
2614 | h->got.offset = s->size; | |
2615 | s->size += 4; | |
2616 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2617 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2618 | s->size += 4; | |
2619 | } | |
ebe50bae | 2620 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2621 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2622 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2623 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2624 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2625 | global. No dynamic relocation against resolved undefined weak |
2626 | symbol in executable. */ | |
37e55690 | 2627 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2628 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2629 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2630 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2631 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2632 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2633 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2634 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2635 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2636 | && !resolved_to_zero) | |
67a4f2b7 | 2637 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2638 | && (bfd_link_pic (info) |
ef5aade5 | 2639 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2640 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2641 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2642 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2643 | } |
2644 | else | |
51b64d56 | 2645 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2646 | |
5a15f56f | 2647 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2648 | return TRUE; |
5a15f56f | 2649 | |
0c715baa AM |
2650 | /* In the shared -Bsymbolic case, discard space allocated for |
2651 | dynamic pc-relative relocs against symbols which turn out to be | |
2652 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2653 | space for pc-relative relocs that have become local due to symbol |
2654 | visibility changes. */ | |
0c715baa | 2655 | |
0e1862bb | 2656 | if (bfd_link_pic (info)) |
5a15f56f | 2657 | { |
09695f56 AM |
2658 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2659 | appear on a call or on something like ".long foo - .". We | |
2660 | want calls to protected symbols to resolve directly to the | |
2661 | function rather than going via the plt. If people want | |
2662 | function pointer comparisons to work as expected then they | |
2663 | should avoid writing assembly like ".long foo - .". */ | |
2664 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2665 | { |
e03a8ed8 | 2666 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2667 | |
2668 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2669 | { | |
c3ce498c L |
2670 | p->count -= p->pc_count; |
2671 | p->pc_count = 0; | |
0c715baa AM |
2672 | if (p->count == 0) |
2673 | *pp = p->next; | |
2674 | else | |
2675 | pp = &p->next; | |
2676 | } | |
5a15f56f | 2677 | } |
4e795f50 | 2678 | |
23209a78 | 2679 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2680 | { |
e03a8ed8 | 2681 | struct elf_dyn_relocs **pp; |
3348747a NS |
2682 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2683 | { | |
2684 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2685 | *pp = p->next; | |
2686 | else | |
2687 | pp = &p->next; | |
2688 | } | |
2689 | } | |
2690 | ||
4e795f50 | 2691 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2692 | visibility or in PIE. */ |
22d606e9 | 2693 | if (eh->dyn_relocs != NULL |
c353e543 | 2694 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2695 | { |
aec6b87e L |
2696 | /* Undefined weak symbol is never bound locally in shared |
2697 | library. */ | |
2698 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2699 | || resolved_to_zero) | |
2700 | { | |
2701 | if (h->non_got_ref) | |
2702 | { | |
2703 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2704 | can branch to 0 without PLT. */ | |
2705 | struct elf_dyn_relocs **pp; | |
2706 | ||
2707 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2708 | if (p->pc_count == 0) | |
2709 | *pp = p->next; | |
2710 | else | |
2711 | { | |
2712 | /* Remove non-R_386_PC32 relocation. */ | |
2713 | p->count = p->pc_count; | |
2714 | pp = &p->next; | |
2715 | } | |
22d606e9 | 2716 | |
aec6b87e L |
2717 | if (eh->dyn_relocs != NULL) |
2718 | { | |
2719 | /* Make sure undefined weak symbols are output | |
2720 | as dynamic symbols in PIEs for dynamic non-GOT | |
2721 | non-PLT reloations. */ | |
2722 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2723 | return FALSE; | |
2724 | } | |
2725 | } | |
2726 | else | |
2727 | eh->dyn_relocs = NULL; | |
2728 | } | |
22d606e9 AM |
2729 | else if (h->dynindx == -1 |
2730 | && !h->forced_local) | |
2731 | { | |
2732 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2733 | return FALSE; | |
2734 | } | |
2735 | } | |
0c715baa | 2736 | } |
a23b6845 | 2737 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2738 | { |
2739 | /* For the non-shared case, discard space for relocs against | |
2740 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2741 | dynamic. Keep dynamic relocations for run-time function |
2742 | pointer initialization. */ | |
0c715baa | 2743 | |
aec6b87e L |
2744 | if ((!h->non_got_ref |
2745 | || eh->func_pointer_refcount > 0 | |
2746 | || (h->root.type == bfd_link_hash_undefweak | |
2747 | && !resolved_to_zero)) | |
f5385ebf AM |
2748 | && ((h->def_dynamic |
2749 | && !h->def_regular) | |
ebe50bae | 2750 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2751 | && (h->root.type == bfd_link_hash_undefweak |
2752 | || h->root.type == bfd_link_hash_undefined)))) | |
2753 | { | |
2754 | /* Make sure this symbol is output as a dynamic symbol. | |
2755 | Undefined weak syms won't yet be marked as dynamic. */ | |
2756 | if (h->dynindx == -1 | |
aec6b87e L |
2757 | && !h->forced_local |
2758 | && !resolved_to_zero) | |
0c715baa | 2759 | { |
c152c796 | 2760 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2761 | return FALSE; |
0c715baa | 2762 | } |
5a15f56f | 2763 | |
0c715baa AM |
2764 | /* If that succeeded, we know we'll be keeping all the |
2765 | relocs. */ | |
2766 | if (h->dynindx != -1) | |
2767 | goto keep; | |
2768 | } | |
2769 | ||
2770 | eh->dyn_relocs = NULL; | |
04ebc307 | 2771 | eh->func_pointer_refcount = 0; |
0c715baa | 2772 | |
ec338859 | 2773 | keep: ; |
5a15f56f AM |
2774 | } |
2775 | ||
0c715baa AM |
2776 | /* Finally, allocate space. */ |
2777 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2778 | { |
e7c33416 NC |
2779 | asection *sreloc; |
2780 | ||
cbe950e9 | 2781 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2782 | |
2783 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2784 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2785 | } |
2786 | ||
b34976b6 | 2787 | return TRUE; |
6725bdbf AM |
2788 | } |
2789 | ||
c25bc9fc L |
2790 | /* Allocate space in .plt, .got and associated reloc sections for |
2791 | local dynamic relocs. */ | |
2792 | ||
2793 | static bfd_boolean | |
2794 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2795 | { | |
2796 | struct elf_link_hash_entry *h | |
2797 | = (struct elf_link_hash_entry *) *slot; | |
2798 | ||
2799 | if (h->type != STT_GNU_IFUNC | |
2800 | || !h->def_regular | |
2801 | || !h->ref_regular | |
2802 | || !h->forced_local | |
2803 | || h->root.type != bfd_link_hash_defined) | |
2804 | abort (); | |
2805 | ||
2806 | return elf_i386_allocate_dynrelocs (h, inf); | |
2807 | } | |
2808 | ||
0c715baa AM |
2809 | /* Find any dynamic relocs that apply to read-only sections. */ |
2810 | ||
b34976b6 | 2811 | static bfd_boolean |
eb4ff4d6 | 2812 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2813 | { |
2814 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 2815 | struct elf_dyn_relocs *p; |
0c715baa | 2816 | |
aa715242 L |
2817 | /* Skip local IFUNC symbols. */ |
2818 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2819 | return TRUE; | |
2820 | ||
0c715baa AM |
2821 | eh = (struct elf_i386_link_hash_entry *) h; |
2822 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2823 | { | |
2824 | asection *s = p->sec->output_section; | |
2825 | ||
2826 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2827 | { | |
2828 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2829 | ||
2830 | info->flags |= DF_TEXTREL; | |
2831 | ||
0e1862bb | 2832 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
2833 | || info->error_textrel) |
2834 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
2835 | p->sec->owner, h->root.root.string, |
2836 | p->sec); | |
2837 | ||
0c715baa | 2838 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2839 | return FALSE; |
0c715baa AM |
2840 | } |
2841 | } | |
b34976b6 | 2842 | return TRUE; |
0c715baa AM |
2843 | } |
2844 | ||
02a86693 L |
2845 | /* With the local symbol, foo, we convert |
2846 | mov foo@GOT[(%reg1)], %reg2 | |
2847 | to | |
2848 | lea foo[@GOTOFF(%reg1)], %reg2 | |
2849 | and convert | |
2850 | call/jmp *foo@GOT[(%reg)] | |
daa67607 | 2851 | to |
02a86693 L |
2852 | nop call foo/jmp foo nop |
2853 | When PIC is false, convert | |
2854 | test %reg1, foo@GOT[(%reg2)] | |
2855 | to | |
2856 | test $foo, %reg1 | |
2857 | and convert | |
2858 | binop foo@GOT[(%reg1)], %reg2 | |
2859 | to | |
2860 | binop $foo, %reg2 | |
2861 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
2862 | instructions. */ | |
daa67607 L |
2863 | |
2864 | static bfd_boolean | |
02a86693 | 2865 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 2866 | struct bfd_link_info *link_info) |
daa67607 L |
2867 | { |
2868 | Elf_Internal_Shdr *symtab_hdr; | |
2869 | Elf_Internal_Rela *internal_relocs; | |
2870 | Elf_Internal_Rela *irel, *irelend; | |
2871 | bfd_byte *contents; | |
2872 | struct elf_i386_link_hash_table *htab; | |
2873 | bfd_boolean changed_contents; | |
2874 | bfd_boolean changed_relocs; | |
bae420ef | 2875 | bfd_boolean is_pic; |
daa67607 L |
2876 | bfd_signed_vma *local_got_refcounts; |
2877 | ||
2878 | /* Don't even try to convert non-ELF outputs. */ | |
2879 | if (!is_elf_hash_table (link_info->hash)) | |
2880 | return FALSE; | |
2881 | ||
c1d11331 | 2882 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2883 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 2884 | || sec->need_convert_load == 0 |
c8831961 | 2885 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2886 | return TRUE; |
2887 | ||
2888 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2889 | ||
2890 | /* Load the relocations for this section. */ | |
2891 | internal_relocs = (_bfd_elf_link_read_relocs | |
2892 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2893 | link_info->keep_memory)); | |
2894 | if (internal_relocs == NULL) | |
2895 | return FALSE; | |
2896 | ||
2897 | htab = elf_i386_hash_table (link_info); | |
2898 | changed_contents = FALSE; | |
2899 | changed_relocs = FALSE; | |
2900 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2901 | ||
bae420ef L |
2902 | is_pic = bfd_link_pic (link_info); |
2903 | ||
daa67607 L |
2904 | /* Get the section contents. */ |
2905 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2906 | contents = elf_section_data (sec)->this_hdr.contents; | |
2907 | else | |
2908 | { | |
2909 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2910 | goto error_return; | |
2911 | } | |
2912 | ||
2913 | irelend = internal_relocs + sec->reloc_count; | |
2914 | for (irel = internal_relocs; irel < irelend; irel++) | |
2915 | { | |
2916 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2917 | unsigned int r_symndx = ELF32_R_SYM (irel->r_info); | |
2918 | unsigned int indx; | |
2919 | struct elf_link_hash_entry *h; | |
02a86693 L |
2920 | unsigned int opcode; |
2921 | unsigned int modrm; | |
2922 | bfd_vma roff; | |
2923 | bfd_boolean baseless; | |
2924 | Elf_Internal_Sym *isym; | |
2925 | unsigned int addend; | |
2926 | unsigned int nop; | |
2927 | bfd_vma nop_offset; | |
bae420ef | 2928 | bfd_boolean to_reloc_32; |
daa67607 | 2929 | |
02a86693 | 2930 | if (r_type != R_386_GOT32 && r_type != R_386_GOT32X) |
daa67607 L |
2931 | continue; |
2932 | ||
02a86693 L |
2933 | roff = irel->r_offset; |
2934 | if (roff < 2) | |
2935 | continue; | |
2936 | ||
02e2aef8 L |
2937 | /* Addend for R_386_GOT32 and R_386_GOT32X relocations must be 0. */ |
2938 | addend = bfd_get_32 (abfd, contents + roff); | |
2939 | if (addend != 0) | |
2940 | continue; | |
2941 | ||
02a86693 L |
2942 | modrm = bfd_get_8 (abfd, contents + roff - 1); |
2943 | baseless = (modrm & 0xc7) == 0x5; | |
2944 | ||
bae420ef | 2945 | if (r_type == R_386_GOT32X && baseless && is_pic) |
daa67607 | 2946 | { |
02a86693 L |
2947 | /* For PIC, disallow R_386_GOT32X without a base register |
2948 | since we don't know what the GOT base is. Allow | |
2949 | R_386_GOT32 for existing object files. */ | |
2950 | const char *name; | |
2951 | ||
2952 | if (r_symndx < symtab_hdr->sh_info) | |
2953 | { | |
2954 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
2955 | r_symndx); | |
2956 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
2957 | } | |
2958 | else | |
2959 | { | |
2960 | indx = r_symndx - symtab_hdr->sh_info; | |
2961 | h = elf_sym_hashes (abfd)[indx]; | |
2962 | BFD_ASSERT (h != NULL); | |
2963 | name = h->root.root.string; | |
2964 | } | |
2965 | ||
2966 | (*_bfd_error_handler) | |
2967 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base register can not be used when making a shared object"), | |
2968 | abfd, name); | |
2969 | goto error_return; | |
2970 | } | |
daa67607 | 2971 | |
02a86693 L |
2972 | opcode = bfd_get_8 (abfd, contents + roff - 2); |
2973 | ||
bae420ef | 2974 | /* Convert mov to lea since it has been done for a while. */ |
02a86693 L |
2975 | if (opcode != 0x8b) |
2976 | { | |
2977 | /* Only convert R_386_GOT32X relocation for call, jmp or | |
2978 | one of adc, add, and, cmp, or, sbb, sub, test, xor | |
2979 | instructions. */ | |
2980 | if (r_type != R_386_GOT32X) | |
2981 | continue; | |
02a86693 L |
2982 | } |
2983 | ||
bae420ef L |
2984 | /* Convert to R_386_32 if PIC is false or there is no base |
2985 | register. */ | |
2986 | to_reloc_32 = !is_pic || baseless; | |
2987 | ||
02a86693 L |
2988 | /* Try to convert R_386_GOT32 and R_386_GOT32X. Get the symbol |
2989 | referred to by the reloc. */ | |
2990 | if (r_symndx < symtab_hdr->sh_info) | |
2991 | { | |
daa67607 L |
2992 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
2993 | abfd, r_symndx); | |
2994 | ||
02a86693 L |
2995 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
2996 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
2997 | continue; | |
2998 | ||
2999 | h = NULL; | |
3000 | if (opcode == 0x0ff) | |
3001 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
3002 | goto convert_branch; | |
3003 | else | |
3004 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
3005 | "test %reg1, foo@GOT(%reg2)" and | |
3006 | "binop foo@GOT[(%reg1)], %reg2". */ | |
3007 | goto convert_load; | |
daa67607 L |
3008 | } |
3009 | ||
3010 | indx = r_symndx - symtab_hdr->sh_info; | |
3011 | h = elf_sym_hashes (abfd)[indx]; | |
3012 | BFD_ASSERT (h != NULL); | |
3013 | ||
3014 | while (h->root.type == bfd_link_hash_indirect | |
3015 | || h->root.type == bfd_link_hash_warning) | |
3016 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3017 | ||
02a86693 L |
3018 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
3019 | if (h->type == STT_GNU_IFUNC) | |
3020 | continue; | |
3021 | ||
bae420ef L |
3022 | /* Undefined weak symbol is only bound locally in executable |
3023 | and its reference is resolved as 0. */ | |
3024 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, | |
3025 | elf_i386_hash_entry (h))) | |
3026 | { | |
3027 | if (opcode == 0xff) | |
3028 | { | |
3029 | /* No direct branch to 0 for PIC. */ | |
3030 | if (is_pic) | |
3031 | continue; | |
3032 | else | |
3033 | goto convert_branch; | |
3034 | } | |
3035 | else | |
3036 | { | |
3037 | /* We can convert load of address 0 to R_386_32. */ | |
3038 | to_reloc_32 = TRUE; | |
3039 | goto convert_load; | |
3040 | } | |
3041 | } | |
3042 | ||
02a86693 L |
3043 | if (opcode == 0xff) |
3044 | { | |
3045 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
3046 | if ((h->root.type == bfd_link_hash_defined | |
3047 | || h->root.type == bfd_link_hash_defweak) | |
3048 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
3049 | { | |
3050 | /* The function is locally defined. */ | |
3051 | convert_branch: | |
02a86693 L |
3052 | /* Convert R_386_GOT32X to R_386_PC32. */ |
3053 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
3054 | { | |
3055 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE | |
3056 | is a nop prefix. */ | |
3057 | modrm = 0xe8; | |
caa65211 L |
3058 | nop = link_info->call_nop_byte; |
3059 | if (link_info->call_nop_as_suffix) | |
3060 | { | |
3061 | nop_offset = roff + 3; | |
3062 | irel->r_offset -= 1; | |
3063 | } | |
3064 | else | |
3065 | nop_offset = roff - 2; | |
02a86693 L |
3066 | } |
3067 | else | |
3068 | { | |
3069 | /* Convert to "jmp foo nop". */ | |
3070 | modrm = 0xe9; | |
3071 | nop = NOP_OPCODE; | |
3072 | nop_offset = roff + 3; | |
3073 | irel->r_offset -= 1; | |
3074 | } | |
3075 | ||
3076 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
3077 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
3078 | /* When converting to PC-relative relocation, we | |
3079 | need to adjust addend by -4. */ | |
3080 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
3081 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
3082 | ||
3083 | if (h) | |
3084 | { | |
3085 | if (h->got.refcount > 0) | |
3086 | h->got.refcount -= 1; | |
3087 | } | |
3088 | else | |
3089 | { | |
3090 | if (local_got_refcounts != NULL | |
3091 | && local_got_refcounts[r_symndx] > 0) | |
3092 | local_got_refcounts[r_symndx] -= 1; | |
3093 | } | |
3094 | ||
3095 | changed_contents = TRUE; | |
3096 | changed_relocs = TRUE; | |
3097 | } | |
3098 | } | |
3099 | else | |
daa67607 | 3100 | { |
02a86693 L |
3101 | /* We have "mov foo@GOT[(%re1g)], %reg2", |
3102 | "test %reg1, foo@GOT(%reg2)" and | |
3103 | "binop foo@GOT[(%reg1)], %reg2". | |
3104 | ||
3105 | Avoid optimizing _DYNAMIC since ld.so may use its | |
3106 | link-time address. */ | |
3107 | if (h == htab->elf.hdynamic) | |
3108 | continue; | |
3109 | ||
ead3d542 L |
3110 | /* def_regular is set by an assignment in a linker script in |
3111 | bfd_elf_record_link_assignment. */ | |
3112 | if ((h->def_regular | |
3113 | || h->root.type == bfd_link_hash_defined | |
3114 | || h->root.type == bfd_link_hash_defweak) | |
02a86693 L |
3115 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) |
3116 | { | |
3117 | convert_load: | |
3118 | if (opcode == 0x8b) | |
3119 | { | |
bae420ef | 3120 | if (to_reloc_32) |
02a86693 | 3121 | { |
bae420ef L |
3122 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to |
3123 | "mov $foo, %reg2" with R_386_32. */ | |
02a86693 | 3124 | r_type = R_386_32; |
bae420ef L |
3125 | modrm = 0xc0 | (modrm & 0x38) >> 3; |
3126 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
3127 | opcode = 0xc7; | |
02a86693 L |
3128 | } |
3129 | else | |
bae420ef L |
3130 | { |
3131 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
3132 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
3133 | r_type = R_386_GOTOFF; | |
3134 | opcode = 0x8d; | |
3135 | } | |
02a86693 L |
3136 | } |
3137 | else | |
3138 | { | |
bae420ef L |
3139 | /* Only R_386_32 is supported. */ |
3140 | if (!to_reloc_32) | |
3141 | continue; | |
3142 | ||
02a86693 L |
3143 | if (opcode == 0x85) |
3144 | { | |
3145 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
3146 | "test $foo, %reg1". */ | |
3147 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
3148 | opcode = 0xf7; | |
3149 | } | |
3150 | else | |
3151 | { | |
3152 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
3153 | "binop $foo, %reg2". */ | |
3154 | modrm = (0xc0 | |
3155 | | (modrm & 0x38) >> 3 | |
3156 | | (opcode & 0x3c)); | |
3157 | opcode = 0x81; | |
3158 | } | |
3159 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
3160 | r_type = R_386_32; | |
3161 | } | |
3162 | ||
3163 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
3164 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
3165 | ||
3166 | if (h) | |
3167 | { | |
3168 | if (h->got.refcount > 0) | |
3169 | h->got.refcount -= 1; | |
3170 | } | |
3171 | else | |
3172 | { | |
3173 | if (local_got_refcounts != NULL | |
3174 | && local_got_refcounts[r_symndx] > 0) | |
3175 | local_got_refcounts[r_symndx] -= 1; | |
3176 | } | |
3177 | ||
3178 | changed_contents = TRUE; | |
3179 | changed_relocs = TRUE; | |
3180 | } | |
daa67607 L |
3181 | } |
3182 | } | |
3183 | ||
3184 | if (contents != NULL | |
3185 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3186 | { | |
3187 | if (!changed_contents && !link_info->keep_memory) | |
3188 | free (contents); | |
3189 | else | |
3190 | { | |
3191 | /* Cache the section contents for elf_link_input_bfd. */ | |
3192 | elf_section_data (sec)->this_hdr.contents = contents; | |
3193 | } | |
3194 | } | |
3195 | ||
3196 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3197 | { | |
3198 | if (!changed_relocs) | |
3199 | free (internal_relocs); | |
3200 | else | |
3201 | elf_section_data (sec)->relocs = internal_relocs; | |
3202 | } | |
3203 | ||
3204 | return TRUE; | |
3205 | ||
3206 | error_return: | |
3207 | if (contents != NULL | |
3208 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3209 | free (contents); | |
3210 | if (internal_relocs != NULL | |
3211 | && elf_section_data (sec)->relocs != internal_relocs) | |
3212 | free (internal_relocs); | |
3213 | return FALSE; | |
3214 | } | |
3215 | ||
252b5132 RH |
3216 | /* Set the sizes of the dynamic sections. */ |
3217 | ||
b34976b6 | 3218 | static bfd_boolean |
23209a78 | 3219 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 3220 | { |
6725bdbf | 3221 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3222 | bfd *dynobj; |
3223 | asection *s; | |
b34976b6 | 3224 | bfd_boolean relocs; |
0c715baa | 3225 | bfd *ibfd; |
252b5132 | 3226 | |
6725bdbf | 3227 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3228 | if (htab == NULL) |
3229 | return FALSE; | |
ebe50bae | 3230 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
3231 | if (dynobj == NULL) |
3232 | abort (); | |
252b5132 | 3233 | |
ebe50bae | 3234 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3235 | { |
3236 | /* Set the contents of the .interp section to the interpreter. */ | |
9b8b325a | 3237 | if (bfd_link_executable (info) && !info->nointerp) |
252b5132 | 3238 | { |
3d4d4302 | 3239 | s = bfd_get_linker_section (dynobj, ".interp"); |
ffb2e45b AM |
3240 | if (s == NULL) |
3241 | abort (); | |
eea6121a | 3242 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 | 3243 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
aec6b87e | 3244 | htab->interp = s; |
252b5132 | 3245 | } |
161d71a6 | 3246 | } |
6725bdbf | 3247 | |
0c715baa AM |
3248 | /* Set up .got offsets for local syms, and space for local dynamic |
3249 | relocs. */ | |
c72f2fb2 | 3250 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
3251 | { |
3252 | bfd_signed_vma *local_got; | |
3253 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 3254 | char *local_tls_type; |
67a4f2b7 | 3255 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
3256 | bfd_size_type locsymcount; |
3257 | Elf_Internal_Shdr *symtab_hdr; | |
3258 | asection *srel; | |
6725bdbf | 3259 | |
0ffa91dd | 3260 | if (! is_i386_elf (ibfd)) |
161d71a6 | 3261 | continue; |
6725bdbf | 3262 | |
0c715baa AM |
3263 | for (s = ibfd->sections; s != NULL; s = s->next) |
3264 | { | |
e03a8ed8 | 3265 | struct elf_dyn_relocs *p; |
0c715baa | 3266 | |
02a86693 | 3267 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
3268 | return FALSE; |
3269 | ||
e03a8ed8 | 3270 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 3271 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
3272 | p != NULL; |
3273 | p = p->next) | |
0c715baa | 3274 | { |
ec338859 AM |
3275 | if (!bfd_is_abs_section (p->sec) |
3276 | && bfd_is_abs_section (p->sec->output_section)) | |
3277 | { | |
3278 | /* Input section has been discarded, either because | |
3279 | it is a copy of a linkonce section or due to | |
3280 | linker script /DISCARD/, so we'll be discarding | |
3281 | the relocs too. */ | |
3282 | } | |
23209a78 | 3283 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
3284 | && strcmp (p->sec->output_section->name, |
3285 | ".tls_vars") == 0) | |
3286 | { | |
3287 | /* Relocations in vxworks .tls_vars sections are | |
3288 | handled specially by the loader. */ | |
3289 | } | |
248866a8 | 3290 | else if (p->count != 0) |
ec338859 AM |
3291 | { |
3292 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 3293 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
3294 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3295 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3296 | { |
3297 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3298 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd L |
3299 | || info->error_textrel) |
3300 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 3301 | p->sec->owner, p->sec); |
b70321a2 | 3302 | } |
ec338859 | 3303 | } |
0c715baa AM |
3304 | } |
3305 | } | |
3306 | ||
3307 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
3308 | if (!local_got) |
3309 | continue; | |
6725bdbf | 3310 | |
0ffa91dd | 3311 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
3312 | locsymcount = symtab_hdr->sh_info; |
3313 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 3314 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 3315 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
3316 | s = htab->elf.sgot; |
3317 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3318 | for (; local_got < end_local_got; |
3319 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 3320 | { |
67a4f2b7 | 3321 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 3322 | if (*local_got > 0) |
6725bdbf | 3323 | { |
67a4f2b7 AO |
3324 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3325 | { | |
6de2ae4a | 3326 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 3327 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 3328 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
3329 | *local_got = (bfd_vma) -2; |
3330 | } | |
3331 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3332 | || GOT_TLS_GD_P (*local_tls_type)) | |
3333 | { | |
3334 | *local_got = s->size; | |
3335 | s->size += 4; | |
3336 | if (GOT_TLS_GD_P (*local_tls_type) | |
3337 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
3338 | s->size += 4; | |
3339 | } | |
0e1862bb | 3340 | if (bfd_link_pic (info) |
67a4f2b7 | 3341 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
3342 | || (*local_tls_type & GOT_TLS_IE)) |
3343 | { | |
3344 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 3345 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3346 | else if (GOT_TLS_GD_P (*local_tls_type) |
3347 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 3348 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 3349 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 3350 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 3351 | } |
6725bdbf | 3352 | } |
161d71a6 L |
3353 | else |
3354 | *local_got = (bfd_vma) -1; | |
6725bdbf | 3355 | } |
252b5132 | 3356 | } |
6725bdbf | 3357 | |
13ae64f3 JJ |
3358 | if (htab->tls_ldm_got.refcount > 0) |
3359 | { | |
3360 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
3361 | relocs. */ | |
6de2ae4a L |
3362 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
3363 | htab->elf.sgot->size += 8; | |
3364 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3365 | } |
3366 | else | |
3367 | htab->tls_ldm_got.offset = -1; | |
3368 | ||
0c715baa AM |
3369 | /* Allocate global sym .plt and .got entries, and space for global |
3370 | sym dynamic relocs. */ | |
eb4ff4d6 | 3371 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 3372 | |
c25bc9fc L |
3373 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3374 | htab_traverse (htab->loc_hash_table, | |
3375 | elf_i386_allocate_local_dynrelocs, | |
3376 | info); | |
3377 | ||
67a4f2b7 AO |
3378 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3379 | incremented. However, when we reserve space for TLS descriptors, | |
3380 | it's not incremented, so in order to compute the space reserved | |
3381 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 3382 | slot size. |
caa0075c | 3383 | |
e1f98742 L |
3384 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
3385 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 3386 | if (htab->elf.srelplt) |
e1f98742 L |
3387 | { |
3388 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
3389 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
3390 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3391 | } | |
3392 | else if (htab->elf.irelplt) | |
3393 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
3394 | ||
67a4f2b7 | 3395 | |
a7b16ceb L |
3396 | if (htab->elf.sgotplt) |
3397 | { | |
3398 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 3399 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3400 | if ((htab->elf.hgot == NULL |
3401 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3402 | && (htab->elf.sgotplt->size |
3403 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3404 | && (htab->elf.splt == NULL |
3405 | || htab->elf.splt->size == 0) | |
3406 | && (htab->elf.sgot == NULL | |
3407 | || htab->elf.sgot->size == 0) | |
3408 | && (htab->elf.iplt == NULL | |
3409 | || htab->elf.iplt->size == 0) | |
3410 | && (htab->elf.igotplt == NULL | |
3411 | || htab->elf.igotplt->size == 0)) | |
3412 | htab->elf.sgotplt->size = 0; | |
3413 | } | |
3414 | ||
9a2a56cc AM |
3415 | |
3416 | if (htab->plt_eh_frame != NULL | |
3417 | && htab->elf.splt != NULL | |
3418 | && htab->elf.splt->size != 0 | |
3419 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3420 | && _bfd_elf_eh_frame_present (info)) | |
3421 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
3422 | ||
5a15f56f AM |
3423 | /* We now have determined the sizes of the various dynamic sections. |
3424 | Allocate memory for them. */ | |
b34976b6 | 3425 | relocs = FALSE; |
252b5132 RH |
3426 | for (s = dynobj->sections; s != NULL; s = s->next) |
3427 | { | |
eac338cf PB |
3428 | bfd_boolean strip_section = TRUE; |
3429 | ||
252b5132 RH |
3430 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3431 | continue; | |
3432 | ||
6de2ae4a | 3433 | if (s == htab->elf.splt |
9a2a56cc | 3434 | || s == htab->elf.sgot) |
252b5132 | 3435 | { |
6725bdbf AM |
3436 | /* Strip this section if we don't need it; see the |
3437 | comment below. */ | |
eac338cf PB |
3438 | /* We'd like to strip these sections if they aren't needed, but if |
3439 | we've exported dynamic symbols from them we must leave them. | |
3440 | It's too late to tell BFD to get rid of the symbols. */ | |
3441 | ||
7325306f | 3442 | if (htab->elf.hplt != NULL) |
eac338cf | 3443 | strip_section = FALSE; |
252b5132 | 3444 | } |
9a2a56cc AM |
3445 | else if (s == htab->elf.sgotplt |
3446 | || s == htab->elf.iplt | |
3447 | || s == htab->elf.igotplt | |
dd7e64d4 | 3448 | || s == htab->plt_got |
9a2a56cc AM |
3449 | || s == htab->plt_eh_frame |
3450 | || s == htab->sdynbss) | |
3451 | { | |
3452 | /* Strip these too. */ | |
3453 | } | |
0112cd26 | 3454 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3455 | { |
6de2ae4a L |
3456 | if (s->size != 0 |
3457 | && s != htab->elf.srelplt | |
3458 | && s != htab->srelplt2) | |
b34976b6 | 3459 | relocs = TRUE; |
252b5132 | 3460 | |
0ac8d2ca AM |
3461 | /* We use the reloc_count field as a counter if we need |
3462 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3463 | s->reloc_count = 0; |
252b5132 | 3464 | } |
6725bdbf | 3465 | else |
252b5132 RH |
3466 | { |
3467 | /* It's not one of our sections, so don't allocate space. */ | |
3468 | continue; | |
3469 | } | |
3470 | ||
c456f082 | 3471 | if (s->size == 0) |
252b5132 | 3472 | { |
0ac8d2ca AM |
3473 | /* If we don't need this section, strip it from the |
3474 | output file. This is mostly to handle .rel.bss and | |
3475 | .rel.plt. We must create both sections in | |
3476 | create_dynamic_sections, because they must be created | |
3477 | before the linker maps input sections to output | |
3478 | sections. The linker does that before | |
3479 | adjust_dynamic_symbol is called, and it is that | |
3480 | function which decides whether anything needs to go | |
3481 | into these sections. */ | |
c456f082 AM |
3482 | if (strip_section) |
3483 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3484 | continue; |
3485 | } | |
3486 | ||
c456f082 AM |
3487 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3488 | continue; | |
3489 | ||
f69da49f AM |
3490 | /* Allocate memory for the section contents. We use bfd_zalloc |
3491 | here in case unused entries are not reclaimed before the | |
3492 | section's contents are written out. This should not happen, | |
3493 | but this way if it does, we get a R_386_NONE reloc instead | |
3494 | of garbage. */ | |
a50b1753 | 3495 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3496 | if (s->contents == NULL) |
b34976b6 | 3497 | return FALSE; |
252b5132 RH |
3498 | } |
3499 | ||
e41b3a13 | 3500 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3501 | && htab->plt_eh_frame->contents != NULL) |
3502 | { | |
3503 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
3504 | sizeof (elf_i386_eh_frame_plt)); | |
3505 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3506 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3507 | } | |
e41b3a13 | 3508 | |
ebe50bae | 3509 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3510 | { |
3511 | /* Add some entries to the .dynamic section. We fill in the | |
3512 | values later, in elf_i386_finish_dynamic_sections, but we | |
3513 | must add the entries now so that we get the correct size for | |
3514 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3515 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3516 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3517 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3518 | |
0e1862bb | 3519 | if (bfd_link_executable (info)) |
252b5132 | 3520 | { |
dc810e39 | 3521 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3522 | return FALSE; |
252b5132 RH |
3523 | } |
3524 | ||
6de2ae4a | 3525 | if (htab->elf.splt->size != 0) |
252b5132 | 3526 | { |
7c1e8d3e L |
3527 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3528 | relocation. */ | |
3529 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3530 | return FALSE; |
7c1e8d3e L |
3531 | |
3532 | if (htab->elf.srelplt->size != 0) | |
3533 | { | |
3534 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3535 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3536 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3537 | return FALSE; | |
3538 | } | |
252b5132 RH |
3539 | } |
3540 | ||
3541 | if (relocs) | |
3542 | { | |
dc810e39 AM |
3543 | if (!add_dynamic_entry (DT_REL, 0) |
3544 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3545 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3546 | return FALSE; |
252b5132 | 3547 | |
0c715baa AM |
3548 | /* If any dynamic relocs apply to a read-only section, |
3549 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3550 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3551 | elf_link_hash_traverse (&htab->elf, |
3552 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3553 | |
3554 | if ((info->flags & DF_TEXTREL) != 0) | |
3555 | { | |
8efa2874 L |
3556 | if ((elf_tdata (output_bfd)->has_gnu_symbols |
3557 | & elf_gnu_symbol_ifunc) == elf_gnu_symbol_ifunc) | |
3558 | { | |
3559 | info->callbacks->einfo | |
3560 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3561 | bfd_set_error (bfd_error_bad_value); | |
3562 | return FALSE; | |
3563 | } | |
3564 | ||
0c715baa | 3565 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3566 | return FALSE; |
0c715baa | 3567 | } |
252b5132 | 3568 | } |
23209a78 | 3569 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3570 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3571 | return FALSE; | |
252b5132 | 3572 | } |
dc810e39 | 3573 | #undef add_dynamic_entry |
252b5132 | 3574 | |
b34976b6 | 3575 | return TRUE; |
252b5132 RH |
3576 | } |
3577 | ||
67a4f2b7 AO |
3578 | static bfd_boolean |
3579 | elf_i386_always_size_sections (bfd *output_bfd, | |
3580 | struct bfd_link_info *info) | |
3581 | { | |
3582 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3583 | ||
3584 | if (tls_sec) | |
3585 | { | |
3586 | struct elf_link_hash_entry *tlsbase; | |
3587 | ||
3588 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3589 | "_TLS_MODULE_BASE_", | |
3590 | FALSE, FALSE, FALSE); | |
3591 | ||
3592 | if (tlsbase && tlsbase->type == STT_TLS) | |
3593 | { | |
4dfe6ac6 | 3594 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3595 | struct bfd_link_hash_entry *bh = NULL; |
3596 | const struct elf_backend_data *bed | |
3597 | = get_elf_backend_data (output_bfd); | |
3598 | ||
4dfe6ac6 NC |
3599 | htab = elf_i386_hash_table (info); |
3600 | if (htab == NULL) | |
3601 | return FALSE; | |
3602 | ||
67a4f2b7 AO |
3603 | if (!(_bfd_generic_link_add_one_symbol |
3604 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3605 | tls_sec, 0, NULL, FALSE, | |
3606 | bed->collect, &bh))) | |
3607 | return FALSE; | |
9f03412a | 3608 | |
4dfe6ac6 | 3609 | htab->tls_module_base = bh; |
9f03412a | 3610 | |
67a4f2b7 AO |
3611 | tlsbase = (struct elf_link_hash_entry *)bh; |
3612 | tlsbase->def_regular = 1; | |
3613 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3614 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3615 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3616 | } | |
3617 | } | |
3618 | ||
3619 | return TRUE; | |
3620 | } | |
3621 | ||
38701953 AM |
3622 | /* Set the correct type for an x86 ELF section. We do this by the |
3623 | section name, which is a hack, but ought to work. */ | |
3624 | ||
b34976b6 | 3625 | static bfd_boolean |
55fd94b0 AM |
3626 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3627 | Elf_Internal_Shdr *hdr, | |
3628 | asection *sec) | |
38701953 | 3629 | { |
91d6fa6a | 3630 | const char *name; |
38701953 AM |
3631 | |
3632 | name = bfd_get_section_name (abfd, sec); | |
3633 | ||
3634 | /* This is an ugly, but unfortunately necessary hack that is | |
3635 | needed when producing EFI binaries on x86. It tells | |
3636 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3637 | containing ELF relocation info. We need this hack in order to | |
3638 | be able to generate ELF binaries that can be translated into | |
3639 | EFI applications (which are essentially COFF objects). Those | |
3640 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3641 | which would normally cause BFD to segfault because it would | |
3642 | attempt to interpret this section as containing relocation | |
3643 | entries for section "oc". With this hack enabled, ".reloc" | |
3644 | will be treated as a normal data section, which will avoid the | |
3645 | segfault. However, you won't be able to create an ELFNN binary | |
3646 | with a section named "oc" that needs relocations, but that's | |
3647 | the kind of ugly side-effects you get when detecting section | |
3648 | types based on their names... In practice, this limitation is | |
3649 | unlikely to bite. */ | |
3650 | if (strcmp (name, ".reloc") == 0) | |
3651 | hdr->sh_type = SHT_PROGBITS; | |
3652 | ||
b34976b6 | 3653 | return TRUE; |
38701953 AM |
3654 | } |
3655 | ||
9f03412a AO |
3656 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3657 | executables. Rather than setting it to the beginning of the TLS | |
3658 | section, we have to set it to the end. This function may be called | |
3659 | multiple times, it is idempotent. */ | |
3660 | ||
3661 | static void | |
eb4ff4d6 | 3662 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3663 | { |
4dfe6ac6 | 3664 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3665 | struct bfd_link_hash_entry *base; |
3666 | ||
0e1862bb | 3667 | if (!bfd_link_executable (info)) |
9f03412a AO |
3668 | return; |
3669 | ||
4dfe6ac6 NC |
3670 | htab = elf_i386_hash_table (info); |
3671 | if (htab == NULL) | |
3672 | return; | |
9f03412a | 3673 | |
4dfe6ac6 NC |
3674 | base = htab->tls_module_base; |
3675 | if (base == NULL) | |
9f03412a AO |
3676 | return; |
3677 | ||
4dfe6ac6 | 3678 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3679 | } |
3680 | ||
13ae64f3 JJ |
3681 | /* Return the base VMA address which should be subtracted from real addresses |
3682 | when resolving @dtpoff relocation. | |
3683 | This is PT_TLS segment p_vaddr. */ | |
3684 | ||
3685 | static bfd_vma | |
eb4ff4d6 | 3686 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3687 | { |
e1918d23 AM |
3688 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3689 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3690 | return 0; |
e1918d23 | 3691 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3692 | } |
3693 | ||
3694 | /* Return the relocation value for @tpoff relocation | |
3695 | if STT_TLS virtual address is ADDRESS. */ | |
3696 | ||
3697 | static bfd_vma | |
eb4ff4d6 | 3698 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3699 | { |
e1918d23 | 3700 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3701 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3702 | bfd_vma static_tls_size; | |
13ae64f3 | 3703 | |
e1918d23 AM |
3704 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3705 | if (htab->tls_sec == NULL) | |
6a30718d | 3706 | return 0; |
7dc98aea RO |
3707 | |
3708 | /* Consider special static TLS alignment requirements. */ | |
3709 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3710 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3711 | } |
3712 | ||
252b5132 RH |
3713 | /* Relocate an i386 ELF section. */ |
3714 | ||
b34976b6 | 3715 | static bfd_boolean |
55fd94b0 AM |
3716 | elf_i386_relocate_section (bfd *output_bfd, |
3717 | struct bfd_link_info *info, | |
3718 | bfd *input_bfd, | |
3719 | asection *input_section, | |
3720 | bfd_byte *contents, | |
3721 | Elf_Internal_Rela *relocs, | |
3722 | Elf_Internal_Sym *local_syms, | |
3723 | asection **local_sections) | |
252b5132 | 3724 | { |
6725bdbf | 3725 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3726 | Elf_Internal_Shdr *symtab_hdr; |
3727 | struct elf_link_hash_entry **sym_hashes; | |
3728 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3729 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3730 | Elf_Internal_Rela *rel; |
60f2e42e | 3731 | Elf_Internal_Rela *wrel; |
252b5132 | 3732 | Elf_Internal_Rela *relend; |
3348747a | 3733 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3734 | unsigned plt_entry_size; |
252b5132 | 3735 | |
0ffa91dd | 3736 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3737 | |
6725bdbf | 3738 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3739 | if (htab == NULL) |
3740 | return FALSE; | |
0ffa91dd | 3741 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3742 | sym_hashes = elf_sym_hashes (input_bfd); |
3743 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3744 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3745 | /* We have to handle relocations in vxworks .tls_vars sections |
3746 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 | 3747 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
0e1862bb | 3748 | && bfd_link_pic (info) |
3348747a NS |
3749 | && !strcmp (input_section->output_section->name, |
3750 | ".tls_vars")); | |
252b5132 | 3751 | |
eb4ff4d6 | 3752 | elf_i386_set_tls_module_base (info); |
9f03412a | 3753 | |
25e762b9 RM |
3754 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3755 | ||
60f2e42e | 3756 | rel = wrel = relocs; |
252b5132 | 3757 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3758 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3759 | { |
13ae64f3 | 3760 | unsigned int r_type; |
252b5132 RH |
3761 | reloc_howto_type *howto; |
3762 | unsigned long r_symndx; | |
3763 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3764 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3765 | Elf_Internal_Sym *sym; |
3766 | asection *sec; | |
dd7e64d4 | 3767 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3768 | bfd_vma relocation; |
b34976b6 | 3769 | bfd_boolean unresolved_reloc; |
252b5132 | 3770 | bfd_reloc_status_type r; |
1b452ec6 | 3771 | unsigned int indx; |
13ae64f3 | 3772 | int tls_type; |
1788fc08 | 3773 | bfd_vma st_size; |
dd7e64d4 | 3774 | asection *resolved_plt; |
aec6b87e | 3775 | bfd_boolean resolved_to_zero; |
252b5132 RH |
3776 | |
3777 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3778 | if (r_type == R_386_GNU_VTINHERIT |
3779 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3780 | { |
3781 | if (wrel != rel) | |
3782 | *wrel = *rel; | |
3783 | continue; | |
3784 | } | |
dc47f327 | 3785 | |
55fd94b0 | 3786 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3787 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3788 | >= R_386_ext - R_386_standard) | |
3789 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3790 | >= R_386_ext2 - R_386_ext)) |
252b5132 | 3791 | { |
6ba842b6 | 3792 | (*_bfd_error_handler) |
d003868e AM |
3793 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3794 | input_bfd, input_section, r_type); | |
252b5132 | 3795 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3796 | return FALSE; |
252b5132 | 3797 | } |
1b452ec6 | 3798 | howto = elf_howto_table + indx; |
252b5132 RH |
3799 | |
3800 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3801 | h = NULL; |
3802 | sym = NULL; | |
3803 | sec = NULL; | |
b34976b6 | 3804 | unresolved_reloc = FALSE; |
252b5132 RH |
3805 | if (r_symndx < symtab_hdr->sh_info) |
3806 | { | |
3807 | sym = local_syms + r_symndx; | |
3808 | sec = local_sections[r_symndx]; | |
3809 | relocation = (sec->output_section->vma | |
3810 | + sec->output_offset | |
3811 | + sym->st_value); | |
1788fc08 | 3812 | st_size = sym->st_size; |
ab96bf03 AM |
3813 | |
3814 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3815 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3816 | || (bfd_link_relocatable (info) |
ab96bf03 | 3817 | && sec->output_offset != 0))) |
f8df10f4 | 3818 | { |
f8df10f4 | 3819 | bfd_vma addend; |
4a335f3d | 3820 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3821 | |
4a335f3d | 3822 | switch (howto->size) |
f8df10f4 | 3823 | { |
4a335f3d AM |
3824 | case 0: |
3825 | addend = bfd_get_8 (input_bfd, where); | |
3826 | if (howto->pc_relative) | |
3827 | { | |
3828 | addend = (addend ^ 0x80) - 0x80; | |
3829 | addend += 1; | |
3830 | } | |
3831 | break; | |
3832 | case 1: | |
3833 | addend = bfd_get_16 (input_bfd, where); | |
3834 | if (howto->pc_relative) | |
3835 | { | |
3836 | addend = (addend ^ 0x8000) - 0x8000; | |
3837 | addend += 2; | |
3838 | } | |
3839 | break; | |
3840 | case 2: | |
3841 | addend = bfd_get_32 (input_bfd, where); | |
3842 | if (howto->pc_relative) | |
3843 | { | |
3844 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3845 | addend += 4; | |
3846 | } | |
3847 | break; | |
3848 | default: | |
3849 | abort (); | |
f8df10f4 JJ |
3850 | } |
3851 | ||
0e1862bb | 3852 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3853 | addend += sec->output_offset; |
3854 | else | |
3855 | { | |
3856 | asection *msec = sec; | |
3857 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3858 | addend); | |
3859 | addend -= relocation; | |
3860 | addend += msec->output_section->vma + msec->output_offset; | |
3861 | } | |
4a335f3d AM |
3862 | |
3863 | switch (howto->size) | |
3864 | { | |
3865 | case 0: | |
16a10388 | 3866 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3867 | if (howto->pc_relative) |
3868 | addend -= 1; | |
3869 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3870 | break; |
3871 | case 1: | |
3872 | if (howto->pc_relative) | |
3873 | addend -= 2; | |
3874 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3875 | break; |
3876 | case 2: | |
3877 | if (howto->pc_relative) | |
3878 | addend -= 4; | |
3879 | bfd_put_32 (input_bfd, addend, where); | |
3880 | break; | |
3881 | } | |
f8df10f4 | 3882 | } |
0e1862bb | 3883 | else if (!bfd_link_relocatable (info) |
1f85278f | 3884 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3885 | { |
3886 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3887 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3888 | FALSE); | |
c25bc9fc L |
3889 | if (h == NULL) |
3890 | abort (); | |
3891 | ||
23209a78 | 3892 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3893 | h->root.u.def.value = sym->st_value; |
3894 | h->root.u.def.section = sec; | |
3895 | } | |
252b5132 RH |
3896 | } |
3897 | else | |
3898 | { | |
3d540e93 | 3899 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3900 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3901 | |
b2a8e766 AM |
3902 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3903 | r_symndx, symtab_hdr, sym_hashes, | |
3904 | h, sec, relocation, | |
62d887d4 | 3905 | unresolved_reloc, warned, ignored); |
1788fc08 | 3906 | st_size = h->size; |
252b5132 RH |
3907 | } |
3908 | ||
dbaa2011 | 3909 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3910 | { |
3911 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3912 | contents + rel->r_offset); | |
3913 | wrel->r_offset = rel->r_offset; | |
3914 | wrel->r_info = 0; | |
3915 | wrel->r_addend = 0; | |
3916 | ||
3917 | /* For ld -r, remove relocations in debug sections against | |
3918 | sections defined in discarded sections. Not done for | |
3919 | eh_frame editing code expects to be present. */ | |
3920 | if (bfd_link_relocatable (info) | |
3921 | && (input_section->flags & SEC_DEBUGGING)) | |
3922 | wrel--; | |
3923 | ||
3924 | continue; | |
3925 | } | |
9635fe29 | 3926 | |
0e1862bb | 3927 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3928 | { |
3929 | if (wrel != rel) | |
3930 | *wrel = *rel; | |
3931 | continue; | |
3932 | } | |
ab96bf03 | 3933 | |
cbe950e9 L |
3934 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3935 | it here if it is defined in a non-shared object. */ | |
3936 | if (h != NULL | |
3937 | && h->type == STT_GNU_IFUNC | |
3938 | && h->def_regular) | |
3939 | { | |
3940 | asection *plt, *gotplt, *base_got; | |
3941 | bfd_vma plt_index; | |
4c544807 | 3942 | const char *name; |
cbe950e9 | 3943 | |
97dc35c8 L |
3944 | if ((input_section->flags & SEC_ALLOC) == 0) |
3945 | { | |
3946 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3947 | sections because such sections are not SEC_ALLOC and | |
3948 | thus ld.so will not process them. */ | |
3949 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3950 | continue; |
97dc35c8 L |
3951 | abort (); |
3952 | } | |
3953 | else if (h->plt.offset == (bfd_vma) -1) | |
cbe950e9 L |
3954 | abort (); |
3955 | ||
3956 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3957 | if (htab->elf.splt != NULL) |
cbe950e9 | 3958 | { |
6de2ae4a L |
3959 | plt = htab->elf.splt; |
3960 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3961 | } |
3962 | else | |
3963 | { | |
6de2ae4a L |
3964 | plt = htab->elf.iplt; |
3965 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3966 | } |
3967 | ||
3968 | relocation = (plt->output_section->vma | |
3969 | + plt->output_offset + h->plt.offset); | |
3970 | ||
3971 | switch (r_type) | |
3972 | { | |
3973 | default: | |
4c544807 L |
3974 | if (h->root.root.string) |
3975 | name = h->root.root.string; | |
3976 | else | |
3977 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3978 | NULL); | |
cbe950e9 L |
3979 | (*_bfd_error_handler) |
3980 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3981 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3982 | elf_howto_table[r_type].name, | |
4c544807 | 3983 | name, __FUNCTION__); |
cbe950e9 L |
3984 | bfd_set_error (bfd_error_bad_value); |
3985 | return FALSE; | |
3986 | ||
3987 | case R_386_32: | |
710ab287 | 3988 | /* Generate dynamic relcoation only when there is a |
c293fa49 | 3989 | non-GOT reference in a shared object. */ |
0e1862bb | 3990 | if (bfd_link_pic (info) && h->non_got_ref) |
710ab287 L |
3991 | { |
3992 | Elf_Internal_Rela outrel; | |
710ab287 L |
3993 | asection *sreloc; |
3994 | bfd_vma offset; | |
3995 | ||
c25bc9fc L |
3996 | /* Need a dynamic relocation to get the real function |
3997 | adddress. */ | |
710ab287 L |
3998 | offset = _bfd_elf_section_offset (output_bfd, |
3999 | info, | |
4000 | input_section, | |
4001 | rel->r_offset); | |
4002 | if (offset == (bfd_vma) -1 | |
4003 | || offset == (bfd_vma) -2) | |
4004 | abort (); | |
4005 | ||
4006 | outrel.r_offset = (input_section->output_section->vma | |
4007 | + input_section->output_offset | |
4008 | + offset); | |
4009 | ||
4010 | if (h->dynindx == -1 | |
44c4ea11 | 4011 | || h->forced_local |
0e1862bb | 4012 | || bfd_link_executable (info)) |
710ab287 L |
4013 | { |
4014 | /* This symbol is resolved locally. */ | |
56b8aada L |
4015 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); |
4016 | bfd_put_32 (output_bfd, | |
4017 | (h->root.u.def.value | |
4018 | + h->root.u.def.section->output_section->vma | |
4019 | + h->root.u.def.section->output_offset), | |
4020 | contents + offset); | |
710ab287 L |
4021 | } |
4022 | else | |
56b8aada | 4023 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
710ab287 | 4024 | |
6de2ae4a | 4025 | sreloc = htab->elf.irelifunc; |
59d6ffb2 | 4026 | elf_append_rel (output_bfd, sreloc, &outrel); |
710ab287 L |
4027 | |
4028 | /* If this reloc is against an external symbol, we | |
4029 | do not want to fiddle with the addend. Otherwise, | |
4030 | we need to include the symbol value so that it | |
4031 | becomes an addend for the dynamic reloc. For an | |
4032 | internal symbol, we have updated addend. */ | |
56b8aada | 4033 | continue; |
710ab287 | 4034 | } |
d59a60e9 | 4035 | /* FALLTHROUGH */ |
cbe950e9 L |
4036 | case R_386_PC32: |
4037 | case R_386_PLT32: | |
4038 | goto do_relocation; | |
4039 | ||
4040 | case R_386_GOT32: | |
02a86693 | 4041 | case R_386_GOT32X: |
6de2ae4a | 4042 | base_got = htab->elf.sgot; |
cbe950e9 L |
4043 | off = h->got.offset; |
4044 | ||
7afd84dc | 4045 | if (base_got == NULL) |
cbe950e9 L |
4046 | abort (); |
4047 | ||
7afd84dc | 4048 | if (off == (bfd_vma) -1) |
cbe950e9 | 4049 | { |
7afd84dc L |
4050 | /* We can't use h->got.offset here to save state, or |
4051 | even just remember the offset, as finish_dynamic_symbol | |
4052 | would use that as offset into .got. */ | |
6bbec505 | 4053 | |
6de2ae4a | 4054 | if (htab->elf.splt != NULL) |
7afd84dc | 4055 | { |
25e762b9 | 4056 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 4057 | off = (plt_index + 3) * 4; |
6de2ae4a | 4058 | base_got = htab->elf.sgotplt; |
7afd84dc | 4059 | } |
cbe950e9 L |
4060 | else |
4061 | { | |
25e762b9 | 4062 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 4063 | off = plt_index * 4; |
6de2ae4a | 4064 | base_got = htab->elf.igotplt; |
7afd84dc L |
4065 | } |
4066 | ||
4067 | if (h->dynindx == -1 | |
4068 | || h->forced_local | |
4069 | || info->symbolic) | |
4070 | { | |
4071 | /* This references the local defitionion. We must | |
4072 | initialize this entry in the global offset table. | |
4073 | Since the offset must always be a multiple of 8, | |
4074 | we use the least significant bit to record | |
4075 | whether we have initialized it already. | |
4076 | ||
4077 | When doing a dynamic link, we create a .rela.got | |
4078 | relocation entry to initialize the value. This | |
4079 | is done in the finish_dynamic_symbol routine. */ | |
4080 | if ((off & 1) != 0) | |
4081 | off &= ~1; | |
4082 | else | |
4083 | { | |
4084 | bfd_put_32 (output_bfd, relocation, | |
4085 | base_got->contents + off); | |
4086 | h->got.offset |= 1; | |
4087 | } | |
cbe950e9 | 4088 | } |
cbe950e9 | 4089 | |
7afd84dc | 4090 | relocation = off; |
cbe950e9 | 4091 | |
7afd84dc | 4092 | /* Adjust for static executables. */ |
6de2ae4a | 4093 | if (htab->elf.splt == NULL) |
7afd84dc L |
4094 | relocation += gotplt->output_offset; |
4095 | } | |
4096 | else | |
0018b0a3 L |
4097 | { |
4098 | relocation = (base_got->output_section->vma | |
4099 | + base_got->output_offset + off | |
4100 | - gotplt->output_section->vma | |
4101 | - gotplt->output_offset); | |
4102 | /* Adjust for static executables. */ | |
6de2ae4a | 4103 | if (htab->elf.splt == NULL) |
0018b0a3 L |
4104 | relocation += gotplt->output_offset; |
4105 | } | |
4106 | ||
cbe950e9 L |
4107 | goto do_relocation; |
4108 | ||
4109 | case R_386_GOTOFF: | |
4110 | relocation -= (gotplt->output_section->vma | |
4111 | + gotplt->output_offset); | |
4112 | goto do_relocation; | |
4113 | } | |
4114 | } | |
4115 | ||
04ebc307 | 4116 | eh = (struct elf_i386_link_hash_entry *) h; |
aec6b87e L |
4117 | resolved_to_zero = (eh != NULL |
4118 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh)); | |
4119 | ||
252b5132 RH |
4120 | switch (r_type) |
4121 | { | |
02a86693 L |
4122 | case R_386_GOT32X: |
4123 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
4124 | link-time address. */ | |
4125 | if (h == htab->elf.hdynamic) | |
4126 | goto r_386_got32; | |
4127 | ||
4128 | if (bfd_link_pic (info)) | |
4129 | { | |
4130 | /* It is OK to convert mov to lea and convert indirect | |
4131 | branch to direct branch. It is OK to convert adc, | |
4132 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
4133 | is false. */ | |
02e2aef8 L |
4134 | unsigned int opcode, addend; |
4135 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
4136 | if (addend != 0) | |
4137 | goto r_386_got32; | |
4138 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
4139 | if (opcode != 0x8b && opcode != 0xff) |
4140 | goto r_386_got32; | |
4141 | } | |
4142 | ||
4143 | /* Resolve "mov GOT[(%reg)], %reg", | |
4144 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
4145 | and "binop foo@GOT[(%reg)], %reg". */ | |
4146 | if (h == NULL | |
4147 | || (h->plt.offset == (bfd_vma) -1 | |
4148 | && h->got.offset == (bfd_vma) -1) | |
4149 | || htab->elf.sgotplt == NULL) | |
4150 | abort (); | |
4151 | ||
4152 | offplt = (htab->elf.sgotplt->output_section->vma | |
4153 | + htab->elf.sgotplt->output_offset); | |
4154 | ||
4155 | /* It is relative to .got.plt section. */ | |
4156 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
4157 | /* Use GOT entry. Mask off the least significant bit in |
4158 | GOT offset which may be set by R_386_GOT32 processing | |
4159 | below. */ | |
02a86693 L |
4160 | relocation = (htab->elf.sgot->output_section->vma |
4161 | + htab->elf.sgot->output_offset | |
32875eb1 | 4162 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
4163 | else |
4164 | /* Use GOTPLT entry. */ | |
4165 | relocation = (h->plt.offset / plt_entry_size - 1 + 3) * 4; | |
4166 | ||
4167 | if (!bfd_link_pic (info)) | |
4168 | { | |
4169 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 4170 | baseless addressing. */ |
02a86693 | 4171 | unsigned int modrm; |
02e2aef8 | 4172 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
4173 | if ((modrm & 0xc7) == 0x5) |
4174 | relocation += offplt; | |
4175 | } | |
4176 | ||
4177 | unresolved_reloc = FALSE; | |
4178 | break; | |
4179 | ||
252b5132 | 4180 | case R_386_GOT32: |
02a86693 | 4181 | r_386_got32: |
252b5132 RH |
4182 | /* Relocation is to the entry for this symbol in the global |
4183 | offset table. */ | |
6de2ae4a | 4184 | if (htab->elf.sgot == NULL) |
ffb2e45b | 4185 | abort (); |
252b5132 RH |
4186 | |
4187 | if (h != NULL) | |
4188 | { | |
b34976b6 | 4189 | bfd_boolean dyn; |
252b5132 RH |
4190 | |
4191 | off = h->got.offset; | |
ebe50bae | 4192 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
4193 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4194 | bfd_link_pic (info), | |
4195 | h) | |
4196 | || (bfd_link_pic (info) | |
586119b3 | 4197 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
4198 | || (ELF_ST_VISIBILITY (h->other) |
4199 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4200 | { |
4201 | /* This is actually a static link, or it is a | |
4202 | -Bsymbolic link and the symbol is defined | |
4203 | locally, or the symbol was forced to be local | |
4204 | because of a version file. We must initialize | |
4205 | this entry in the global offset table. Since the | |
4206 | offset must always be a multiple of 4, we use the | |
4207 | least significant bit to record whether we have | |
4208 | initialized it already. | |
4209 | ||
4210 | When doing a dynamic link, we create a .rel.got | |
4211 | relocation entry to initialize the value. This | |
4212 | is done in the finish_dynamic_symbol routine. */ | |
4213 | if ((off & 1) != 0) | |
4214 | off &= ~1; | |
4215 | else | |
4216 | { | |
4217 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 4218 | htab->elf.sgot->contents + off); |
252b5132 RH |
4219 | h->got.offset |= 1; |
4220 | } | |
4221 | } | |
8c694914 | 4222 | else |
b34976b6 | 4223 | unresolved_reloc = FALSE; |
252b5132 RH |
4224 | } |
4225 | else | |
4226 | { | |
ffb2e45b AM |
4227 | if (local_got_offsets == NULL) |
4228 | abort (); | |
252b5132 RH |
4229 | |
4230 | off = local_got_offsets[r_symndx]; | |
4231 | ||
4232 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
4233 | the least significant bit to record whether we have |
4234 | already generated the necessary reloc. */ | |
252b5132 RH |
4235 | if ((off & 1) != 0) |
4236 | off &= ~1; | |
4237 | else | |
4238 | { | |
6725bdbf | 4239 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 4240 | htab->elf.sgot->contents + off); |
252b5132 | 4241 | |
0e1862bb | 4242 | if (bfd_link_pic (info)) |
252b5132 | 4243 | { |
947216bf AM |
4244 | asection *s; |
4245 | Elf_Internal_Rela outrel; | |
252b5132 | 4246 | |
6de2ae4a | 4247 | s = htab->elf.srelgot; |
947216bf | 4248 | if (s == NULL) |
ffb2e45b | 4249 | abort (); |
252b5132 | 4250 | |
6de2ae4a L |
4251 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4252 | + htab->elf.sgot->output_offset | |
252b5132 RH |
4253 | + off); |
4254 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 4255 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
4256 | } |
4257 | ||
4258 | local_got_offsets[r_symndx] |= 1; | |
4259 | } | |
252b5132 RH |
4260 | } |
4261 | ||
ffb2e45b AM |
4262 | if (off >= (bfd_vma) -2) |
4263 | abort (); | |
4264 | ||
6de2ae4a L |
4265 | relocation = htab->elf.sgot->output_section->vma |
4266 | + htab->elf.sgot->output_offset + off | |
4267 | - htab->elf.sgotplt->output_section->vma | |
4268 | - htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4269 | break; |
4270 | ||
4271 | case R_386_GOTOFF: | |
4272 | /* Relocation is relative to the start of the global offset | |
4273 | table. */ | |
4274 | ||
3d949995 L |
4275 | /* Check to make sure it isn't a protected function or data |
4276 | symbol for shared library since it may not be local when | |
4277 | used as function address or with copy relocation. We also | |
e3c0e327 | 4278 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 4279 | if (!bfd_link_executable (info) && h) |
90f487df | 4280 | { |
41bed6dd L |
4281 | if (!h->def_regular) |
4282 | { | |
4283 | const char *v; | |
4284 | ||
4285 | switch (ELF_ST_VISIBILITY (h->other)) | |
4286 | { | |
4287 | case STV_HIDDEN: | |
4288 | v = _("hidden symbol"); | |
4289 | break; | |
4290 | case STV_INTERNAL: | |
4291 | v = _("internal symbol"); | |
4292 | break; | |
4293 | case STV_PROTECTED: | |
4294 | v = _("protected symbol"); | |
4295 | break; | |
4296 | default: | |
4297 | v = _("symbol"); | |
4298 | break; | |
4299 | } | |
4300 | ||
4301 | (*_bfd_error_handler) | |
4302 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
4303 | input_bfd, v, h->root.root.string); | |
4304 | bfd_set_error (bfd_error_bad_value); | |
4305 | return FALSE; | |
4306 | } | |
d5597ebc | 4307 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
4308 | && (h->type == STT_FUNC |
4309 | || h->type == STT_OBJECT) | |
41bed6dd L |
4310 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
4311 | { | |
4312 | (*_bfd_error_handler) | |
3d949995 L |
4313 | (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"), |
4314 | input_bfd, | |
4315 | h->type == STT_FUNC ? "function" : "data", | |
4316 | h->root.root.string); | |
41bed6dd L |
4317 | bfd_set_error (bfd_error_bad_value); |
4318 | return FALSE; | |
4319 | } | |
90f487df L |
4320 | } |
4321 | ||
8c37241b JJ |
4322 | /* Note that sgot is not involved in this |
4323 | calculation. We always want the start of .got.plt. If we | |
4324 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
4325 | permitted by the ABI, we might have to change this |
4326 | calculation. */ | |
6de2ae4a L |
4327 | relocation -= htab->elf.sgotplt->output_section->vma |
4328 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4329 | break; |
4330 | ||
4331 | case R_386_GOTPC: | |
4332 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
4333 | relocation = htab->elf.sgotplt->output_section->vma |
4334 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 4335 | unresolved_reloc = FALSE; |
252b5132 RH |
4336 | break; |
4337 | ||
4338 | case R_386_PLT32: | |
4339 | /* Relocation is to the entry for this symbol in the | |
4340 | procedure linkage table. */ | |
4341 | ||
dd5724d5 | 4342 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 4343 | without using the procedure linkage table. */ |
252b5132 RH |
4344 | if (h == NULL) |
4345 | break; | |
4346 | ||
dd7e64d4 L |
4347 | if ((h->plt.offset == (bfd_vma) -1 |
4348 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4349 | || htab->elf.splt == NULL) |
252b5132 RH |
4350 | { |
4351 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
4352 | happens when statically linking PIC code, or when |
4353 | using -Bsymbolic. */ | |
252b5132 RH |
4354 | break; |
4355 | } | |
4356 | ||
dd7e64d4 L |
4357 | if (h->plt.offset != (bfd_vma) -1) |
4358 | { | |
4359 | resolved_plt = htab->elf.splt; | |
4360 | plt_offset = h->plt.offset; | |
4361 | } | |
4362 | else | |
4363 | { | |
4364 | resolved_plt = htab->plt_got; | |
4365 | plt_offset = eh->plt_got.offset; | |
4366 | } | |
4367 | ||
4368 | relocation = (resolved_plt->output_section->vma | |
4369 | + resolved_plt->output_offset | |
4370 | + plt_offset); | |
b34976b6 | 4371 | unresolved_reloc = FALSE; |
252b5132 RH |
4372 | break; |
4373 | ||
1788fc08 | 4374 | case R_386_SIZE32: |
1788fc08 L |
4375 | /* Set to symbol size. */ |
4376 | relocation = st_size; | |
4377 | /* Fall through. */ | |
4378 | ||
252b5132 RH |
4379 | case R_386_32: |
4380 | case R_386_PC32: | |
3348747a NS |
4381 | if ((input_section->flags & SEC_ALLOC) == 0 |
4382 | || is_vxworks_tls) | |
ec338859 AM |
4383 | break; |
4384 | ||
aec6b87e L |
4385 | /* Copy dynamic function pointer relocations. Don't generate |
4386 | dynamic relocations against resolved undefined weak symbols | |
4387 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4388 | if ((bfd_link_pic (info) |
ef5aade5 | 4389 | && (h == NULL |
aec6b87e L |
4390 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4391 | && (!resolved_to_zero | |
4392 | || r_type == R_386_PC32)) | |
4393 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4394 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4395 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4396 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4397 | && !bfd_link_pic (info) |
12d0ee4a AM |
4398 | && h != NULL |
4399 | && h->dynindx != -1 | |
aec6b87e L |
4400 | && (!h->non_got_ref |
4401 | || eh->func_pointer_refcount > 0 | |
4402 | || (h->root.type == bfd_link_hash_undefweak | |
4403 | && !resolved_to_zero)) | |
bae420ef L |
4404 | && ((h->def_dynamic && !h->def_regular) |
4405 | /* Undefined weak symbol is bound locally when | |
4406 | PIC is false. */ | |
4407 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4408 | { |
947216bf | 4409 | Elf_Internal_Rela outrel; |
b34976b6 | 4410 | bfd_boolean skip, relocate; |
0c715baa | 4411 | asection *sreloc; |
252b5132 RH |
4412 | |
4413 | /* When generating a shared object, these relocations | |
4414 | are copied into the output file to be resolved at run | |
4415 | time. */ | |
4416 | ||
b34976b6 AM |
4417 | skip = FALSE; |
4418 | relocate = FALSE; | |
252b5132 | 4419 | |
c629eae0 JJ |
4420 | outrel.r_offset = |
4421 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4422 | rel->r_offset); | |
4423 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4424 | skip = TRUE; |
0bb2d96a | 4425 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4426 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4427 | outrel.r_offset += (input_section->output_section->vma |
4428 | + input_section->output_offset); | |
4429 | ||
4430 | if (skip) | |
0bb2d96a | 4431 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4432 | else if (h != NULL |
4433 | && h->dynindx != -1 | |
4434 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4435 | || !(bfd_link_executable (info) |
4436 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4437 | || !h->def_regular)) |
0bb2d96a | 4438 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4439 | else |
4440 | { | |
5a15f56f | 4441 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4442 | relocate = TRUE; |
5a15f56f | 4443 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4444 | } |
4445 | ||
cbe950e9 | 4446 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4447 | |
62d78908 L |
4448 | if (sreloc == NULL || sreloc->contents == NULL) |
4449 | { | |
4450 | r = bfd_reloc_notsupported; | |
4451 | goto check_relocation_error; | |
4452 | } | |
0c715baa | 4453 | |
59d6ffb2 | 4454 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4455 | |
4456 | /* If this reloc is against an external symbol, we do | |
4457 | not want to fiddle with the addend. Otherwise, we | |
4458 | need to include the symbol value so that it becomes | |
4459 | an addend for the dynamic reloc. */ | |
0f88be7a | 4460 | if (! relocate) |
252b5132 RH |
4461 | continue; |
4462 | } | |
252b5132 RH |
4463 | break; |
4464 | ||
37e55690 | 4465 | case R_386_TLS_IE: |
0e1862bb | 4466 | if (!bfd_link_executable (info)) |
37e55690 | 4467 | { |
947216bf | 4468 | Elf_Internal_Rela outrel; |
37e55690 | 4469 | asection *sreloc; |
37e55690 JJ |
4470 | |
4471 | outrel.r_offset = rel->r_offset | |
4472 | + input_section->output_section->vma | |
4473 | + input_section->output_offset; | |
4474 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4475 | sreloc = elf_section_data (input_section)->sreloc; | |
4476 | if (sreloc == NULL) | |
4477 | abort (); | |
59d6ffb2 | 4478 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4479 | } |
4480 | /* Fall through */ | |
4481 | ||
13ae64f3 | 4482 | case R_386_TLS_GD: |
67a4f2b7 AO |
4483 | case R_386_TLS_GOTDESC: |
4484 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4485 | case R_386_TLS_IE_32: |
37e55690 | 4486 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4487 | tls_type = GOT_UNKNOWN; |
4488 | if (h == NULL && local_got_offsets) | |
4489 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
4490 | else if (h != NULL) | |
142411ca | 4491 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
4492 | if (tls_type == GOT_TLS_IE) |
4493 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4494 | |
4495 | if (! elf_i386_tls_transition (info, input_bfd, | |
4496 | input_section, contents, | |
4497 | symtab_hdr, sym_hashes, | |
4498 | &r_type, tls_type, rel, | |
4c544807 | 4499 | relend, h, r_symndx)) |
142411ca | 4500 | return FALSE; |
13ae64f3 JJ |
4501 | |
4502 | if (r_type == R_386_TLS_LE_32) | |
4503 | { | |
82e51918 | 4504 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4505 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4506 | { | |
142411ca | 4507 | unsigned int type; |
13ae64f3 JJ |
4508 | bfd_vma roff; |
4509 | ||
4510 | /* GD->LE transition. */ | |
13ae64f3 | 4511 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4512 | if (type == 0x04) |
4513 | { | |
4514 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4515 | Change it into: | |
4516 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
4517 | (6 byte form of subl). */ | |
13ae64f3 JJ |
4518 | memcpy (contents + rel->r_offset - 3, |
4519 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 4520 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4521 | } |
4522 | else | |
4523 | { | |
142411ca L |
4524 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
4525 | Change it into: | |
4526 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
4527 | (6 byte form of subl). */ | |
4528 | memcpy (contents + rel->r_offset - 2, | |
4529 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
4530 | roff = rel->r_offset + 6; | |
13ae64f3 | 4531 | } |
eb4ff4d6 | 4532 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4533 | contents + roff); |
a3fadc9a | 4534 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 4535 | rel++; |
60f2e42e | 4536 | wrel++; |
13ae64f3 JJ |
4537 | continue; |
4538 | } | |
67a4f2b7 AO |
4539 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4540 | { | |
4541 | /* GDesc -> LE transition. | |
4542 | It's originally something like: | |
4543 | leal x@tlsdesc(%ebx), %eax | |
4544 | ||
4545 | leal x@ntpoff, %eax | |
4546 | ||
4547 | Registers other than %eax may be set up here. */ | |
4548 | ||
142411ca | 4549 | unsigned int val; |
67a4f2b7 AO |
4550 | bfd_vma roff; |
4551 | ||
67a4f2b7 | 4552 | roff = rel->r_offset; |
67a4f2b7 | 4553 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4554 | |
4555 | /* Now modify the instruction as appropriate. */ | |
4556 | /* aoliva FIXME: remove the above and xor the byte | |
4557 | below with 0x86. */ | |
4558 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4559 | contents + roff - 1); | |
eb4ff4d6 | 4560 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4561 | contents + roff); |
4562 | continue; | |
4563 | } | |
4564 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4565 | { | |
4566 | /* GDesc -> LE transition. | |
4567 | It's originally: | |
4568 | call *(%eax) | |
4569 | Turn it into: | |
142411ca | 4570 | xchg %ax,%ax */ |
67a4f2b7 | 4571 | |
67a4f2b7 | 4572 | bfd_vma roff; |
6bbec505 | 4573 | |
67a4f2b7 | 4574 | roff = rel->r_offset; |
10efb593 | 4575 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4576 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4577 | continue; | |
4578 | } | |
37e55690 | 4579 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4580 | { |
142411ca | 4581 | unsigned int val; |
13ae64f3 JJ |
4582 | |
4583 | /* IE->LE transition: | |
37e55690 JJ |
4584 | Originally it can be one of: |
4585 | movl foo, %eax | |
4586 | movl foo, %reg | |
4587 | addl foo, %reg | |
4588 | We change it into: | |
4589 | movl $foo, %eax | |
4590 | movl $foo, %reg | |
4591 | addl $foo, %reg. */ | |
37e55690 | 4592 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4593 | if (val == 0xa1) |
4594 | { | |
4595 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4596 | bfd_put_8 (output_bfd, 0xb8, |
4597 | contents + rel->r_offset - 1); | |
37e55690 | 4598 | } |
299bf759 | 4599 | else |
37e55690 | 4600 | { |
142411ca L |
4601 | unsigned int type; |
4602 | ||
55fd94b0 AM |
4603 | type = bfd_get_8 (input_bfd, |
4604 | contents + rel->r_offset - 2); | |
299bf759 | 4605 | switch (type) |
26e41594 | 4606 | { |
299bf759 L |
4607 | case 0x8b: |
4608 | /* movl */ | |
299bf759 L |
4609 | bfd_put_8 (output_bfd, 0xc7, |
4610 | contents + rel->r_offset - 2); | |
4611 | bfd_put_8 (output_bfd, | |
4612 | 0xc0 | ((val >> 3) & 7), | |
4613 | contents + rel->r_offset - 1); | |
4614 | break; | |
4615 | case 0x03: | |
4616 | /* addl */ | |
299bf759 L |
4617 | bfd_put_8 (output_bfd, 0x81, |
4618 | contents + rel->r_offset - 2); | |
4619 | bfd_put_8 (output_bfd, | |
4620 | 0xc0 | ((val >> 3) & 7), | |
4621 | contents + rel->r_offset - 1); | |
4622 | break; | |
4623 | default: | |
4624 | BFD_FAIL (); | |
4625 | break; | |
26e41594 | 4626 | } |
37e55690 | 4627 | } |
eb4ff4d6 | 4628 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4629 | contents + rel->r_offset); |
4630 | continue; | |
4631 | } | |
4632 | else | |
4633 | { | |
4634 | unsigned int val, type; | |
4635 | ||
4636 | /* {IE_32,GOTIE}->LE transition: | |
4637 | Originally it can be one of: | |
13ae64f3 | 4638 | subl foo(%reg1), %reg2 |
13ae64f3 | 4639 | movl foo(%reg1), %reg2 |
37e55690 | 4640 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4641 | We change it into: |
4642 | subl $foo, %reg2 | |
37e55690 JJ |
4643 | movl $foo, %reg2 (6 byte form) |
4644 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4645 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4646 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4647 | if (type == 0x8b) |
4648 | { | |
4649 | /* movl */ | |
13ae64f3 JJ |
4650 | bfd_put_8 (output_bfd, 0xc7, |
4651 | contents + rel->r_offset - 2); | |
4652 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4653 | contents + rel->r_offset - 1); | |
4654 | } | |
4655 | else if (type == 0x2b) | |
4656 | { | |
4657 | /* subl */ | |
13ae64f3 JJ |
4658 | bfd_put_8 (output_bfd, 0x81, |
4659 | contents + rel->r_offset - 2); | |
4660 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4661 | contents + rel->r_offset - 1); | |
4662 | } | |
37e55690 JJ |
4663 | else if (type == 0x03) |
4664 | { | |
4665 | /* addl */ | |
4666 | bfd_put_8 (output_bfd, 0x81, | |
4667 | contents + rel->r_offset - 2); | |
4668 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4669 | contents + rel->r_offset - 1); | |
4670 | } | |
13ae64f3 JJ |
4671 | else |
4672 | BFD_FAIL (); | |
37e55690 | 4673 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4674 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4675 | contents + rel->r_offset); |
4676 | else | |
eb4ff4d6 | 4677 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4678 | contents + rel->r_offset); |
13ae64f3 JJ |
4679 | continue; |
4680 | } | |
4681 | } | |
4682 | ||
6de2ae4a | 4683 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4684 | abort (); |
4685 | ||
4686 | if (h != NULL) | |
67a4f2b7 AO |
4687 | { |
4688 | off = h->got.offset; | |
4689 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4690 | } | |
13ae64f3 JJ |
4691 | else |
4692 | { | |
4693 | if (local_got_offsets == NULL) | |
4694 | abort (); | |
4695 | ||
4696 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4697 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4698 | } |
4699 | ||
4700 | if ((off & 1) != 0) | |
4701 | off &= ~1; | |
26e41594 | 4702 | else |
13ae64f3 | 4703 | { |
947216bf | 4704 | Elf_Internal_Rela outrel; |
91d6fa6a | 4705 | int dr_type; |
67a4f2b7 | 4706 | asection *sreloc; |
13ae64f3 | 4707 | |
6de2ae4a | 4708 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4709 | abort (); |
4710 | ||
67a4f2b7 AO |
4711 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4712 | ||
4713 | if (GOT_TLS_GDESC_P (tls_type)) | |
4714 | { | |
59d6ffb2 | 4715 | bfd_byte *loc; |
67a4f2b7 AO |
4716 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4717 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4718 | <= htab->elf.sgotplt->size); |
4719 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4720 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4721 | + offplt |
4722 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4723 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4724 | loc = sreloc->contents; |
5ae0bfb6 RS |
4725 | loc += (htab->next_tls_desc_index++ |
4726 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4727 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4728 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4729 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4730 | if (indx == 0) | |
4731 | { | |
4732 | BFD_ASSERT (! unresolved_reloc); | |
4733 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4734 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4735 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4736 | + htab->sgotplt_jump_table_size + 4); |
4737 | } | |
4738 | else | |
4739 | { | |
4740 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4741 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4742 | + htab->sgotplt_jump_table_size + 4); |
4743 | } | |
4744 | } | |
4745 | ||
6de2ae4a | 4746 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4747 | |
6de2ae4a L |
4748 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4749 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4750 | |
67a4f2b7 | 4751 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4752 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4753 | else if (GOT_TLS_GDESC_P (tls_type)) |
4754 | goto dr_done; | |
37e55690 JJ |
4755 | else if (tls_type == GOT_TLS_IE_POS) |
4756 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4757 | else |
4758 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4759 | |
37e55690 | 4760 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4761 | bfd_put_32 (output_bfd, |
4762 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4763 | htab->elf.sgot->contents + off); |
37e55690 | 4764 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4765 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4766 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4767 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4768 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4769 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4770 | htab->elf.sgot->contents + off); |
13ae64f3 | 4771 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4772 | |
59d6ffb2 | 4773 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4774 | |
67a4f2b7 | 4775 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4776 | { |
4777 | if (indx == 0) | |
4778 | { | |
82e51918 | 4779 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4780 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4781 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4782 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4783 | } |
4784 | else | |
4785 | { | |
4786 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4787 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4788 | outrel.r_info = ELF32_R_INFO (indx, |
4789 | R_386_TLS_DTPOFF32); | |
4790 | outrel.r_offset += 4; | |
59d6ffb2 | 4791 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4792 | } |
4793 | } | |
37e55690 JJ |
4794 | else if (tls_type == GOT_TLS_IE_BOTH) |
4795 | { | |
4796 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4797 | (indx == 0 |
4798 | ? relocation - elf_i386_dtpoff_base (info) | |
4799 | : 0), | |
6de2ae4a | 4800 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4801 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4802 | outrel.r_offset += 4; | |
59d6ffb2 | 4803 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4804 | } |
13ae64f3 | 4805 | |
67a4f2b7 | 4806 | dr_done: |
13ae64f3 JJ |
4807 | if (h != NULL) |
4808 | h->got.offset |= 1; | |
4809 | else | |
4810 | local_got_offsets[r_symndx] |= 1; | |
4811 | } | |
4812 | ||
67a4f2b7 AO |
4813 | if (off >= (bfd_vma) -2 |
4814 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4815 | abort (); |
67a4f2b7 AO |
4816 | if (r_type == R_386_TLS_GOTDESC |
4817 | || r_type == R_386_TLS_DESC_CALL) | |
4818 | { | |
4819 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4820 | unresolved_reloc = FALSE; | |
4821 | } | |
4822 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4823 | { |
6de2ae4a L |
4824 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4825 | + htab->elf.sgotplt->output_offset; | |
4826 | relocation = htab->elf.sgot->output_section->vma | |
4827 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4828 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4829 | && tls_type == GOT_TLS_IE_BOTH) | |
4830 | relocation += 4; | |
4831 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4832 | relocation += g_o_t; |
b34976b6 | 4833 | unresolved_reloc = FALSE; |
13ae64f3 | 4834 | } |
67a4f2b7 | 4835 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4836 | { |
4837 | unsigned int val, type; | |
4838 | bfd_vma roff; | |
4839 | ||
4840 | /* GD->IE transition. */ | |
13ae64f3 | 4841 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4842 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
4843 | if (type == 0x04) | |
4844 | { | |
4845 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4846 | Change it into: | |
4847 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 4848 | val >>= 3; |
142411ca | 4849 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4850 | } |
4851 | else | |
4852 | { | |
4853 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
4854 | Change it into: | |
4855 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4856 | roff = rel->r_offset - 2; |
4857 | } | |
4858 | memcpy (contents + roff, | |
4859 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4860 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4861 | /* If foo is used only with foo@gotntpoff(%reg) and |
4862 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4863 | subl $foo@gottpoff(%reg), %eax | |
4864 | into: | |
4865 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4866 | if (tls_type == GOT_TLS_IE_POS) |
4867 | contents[roff + 6] = 0x03; | |
8c37241b | 4868 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4869 | htab->elf.sgot->output_section->vma |
4870 | + htab->elf.sgot->output_offset + off | |
4871 | - htab->elf.sgotplt->output_section->vma | |
4872 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 JJ |
4873 | contents + roff + 8); |
4874 | /* Skip R_386_PLT32. */ | |
4875 | rel++; | |
60f2e42e | 4876 | wrel++; |
13ae64f3 JJ |
4877 | continue; |
4878 | } | |
67a4f2b7 AO |
4879 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4880 | { | |
4881 | /* GDesc -> IE transition. | |
4882 | It's originally something like: | |
4883 | leal x@tlsdesc(%ebx), %eax | |
4884 | ||
4885 | Change it to: | |
142411ca | 4886 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4887 | or: |
4888 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4889 | ||
4890 | Registers other than %eax may be set up here. */ | |
4891 | ||
67a4f2b7 AO |
4892 | bfd_vma roff; |
4893 | ||
4894 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4895 | offset into any register, although it's probably | |
4896 | almost always going to be eax. */ | |
4897 | roff = rel->r_offset; | |
67a4f2b7 AO |
4898 | |
4899 | /* Now modify the instruction as appropriate. */ | |
4900 | /* To turn a leal into a movl in the form we use it, it | |
4901 | suffices to change the first byte from 0x8d to 0x8b. | |
4902 | aoliva FIXME: should we decide to keep the leal, all | |
4903 | we have to do is remove the statement below, and | |
4904 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4905 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4906 | ||
4907 | if (tls_type == GOT_TLS_IE_BOTH) | |
4908 | off += 4; | |
4909 | ||
4910 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4911 | htab->elf.sgot->output_section->vma |
4912 | + htab->elf.sgot->output_offset + off | |
4913 | - htab->elf.sgotplt->output_section->vma | |
4914 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4915 | contents + roff); |
4916 | continue; | |
4917 | } | |
4918 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4919 | { | |
4920 | /* GDesc -> IE transition. | |
4921 | It's originally: | |
4922 | call *(%eax) | |
4923 | ||
4924 | Change it to: | |
142411ca | 4925 | xchg %ax,%ax |
67a4f2b7 AO |
4926 | or |
4927 | negl %eax | |
4928 | depending on how we transformed the TLS_GOTDESC above. | |
4929 | */ | |
4930 | ||
67a4f2b7 AO |
4931 | bfd_vma roff; |
4932 | ||
67a4f2b7 | 4933 | roff = rel->r_offset; |
67a4f2b7 AO |
4934 | |
4935 | /* Now modify the instruction as appropriate. */ | |
4936 | if (tls_type != GOT_TLS_IE_NEG) | |
4937 | { | |
10efb593 L |
4938 | /* xchg %ax,%ax */ |
4939 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4940 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4941 | } | |
4942 | else | |
4943 | { | |
4944 | /* negl %eax */ | |
4945 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4946 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4947 | } | |
4948 | ||
4949 | continue; | |
4950 | } | |
4951 | else | |
4952 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4953 | break; |
4954 | ||
4955 | case R_386_TLS_LDM: | |
142411ca L |
4956 | if (! elf_i386_tls_transition (info, input_bfd, |
4957 | input_section, contents, | |
4958 | symtab_hdr, sym_hashes, | |
4959 | &r_type, GOT_UNKNOWN, rel, | |
4c544807 | 4960 | relend, h, r_symndx)) |
142411ca | 4961 | return FALSE; |
13ae64f3 | 4962 | |
142411ca L |
4963 | if (r_type != R_386_TLS_LDM) |
4964 | { | |
13ae64f3 | 4965 | /* LD->LE transition: |
13ae64f3 JJ |
4966 | leal foo(%reg), %eax; call ___tls_get_addr. |
4967 | We change it into: | |
4968 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4969 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4970 | memcpy (contents + rel->r_offset - 2, |
4971 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4972 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 4973 | rel++; |
60f2e42e | 4974 | wrel++; |
13ae64f3 JJ |
4975 | continue; |
4976 | } | |
4977 | ||
6de2ae4a | 4978 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4979 | abort (); |
4980 | ||
4981 | off = htab->tls_ldm_got.offset; | |
4982 | if (off & 1) | |
4983 | off &= ~1; | |
4984 | else | |
4985 | { | |
947216bf | 4986 | Elf_Internal_Rela outrel; |
13ae64f3 | 4987 | |
6de2ae4a | 4988 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4989 | abort (); |
4990 | ||
6de2ae4a L |
4991 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4992 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4993 | |
4994 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4995 | htab->elf.sgot->contents + off); |
13ae64f3 | 4996 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4997 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4998 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 4999 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
5000 | htab->tls_ldm_got.offset |= 1; |
5001 | } | |
6de2ae4a L |
5002 | relocation = htab->elf.sgot->output_section->vma |
5003 | + htab->elf.sgot->output_offset + off | |
5004 | - htab->elf.sgotplt->output_section->vma | |
5005 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 5006 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
5007 | break; |
5008 | ||
5009 | case R_386_TLS_LDO_32: | |
0e1862bb L |
5010 | if (!bfd_link_executable (info) |
5011 | || (input_section->flags & SEC_CODE) == 0) | |
eb4ff4d6 | 5012 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
5013 | else |
5014 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 5015 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5016 | break; |
5017 | ||
5018 | case R_386_TLS_LE_32: | |
13ae64f3 | 5019 | case R_386_TLS_LE: |
0e1862bb | 5020 | if (!bfd_link_executable (info)) |
37e55690 | 5021 | { |
947216bf | 5022 | Elf_Internal_Rela outrel; |
37e55690 | 5023 | asection *sreloc; |
37e55690 JJ |
5024 | |
5025 | outrel.r_offset = rel->r_offset | |
5026 | + input_section->output_section->vma | |
5027 | + input_section->output_offset; | |
5028 | if (h != NULL && h->dynindx != -1) | |
5029 | indx = h->dynindx; | |
5030 | else | |
5031 | indx = 0; | |
5032 | if (r_type == R_386_TLS_LE_32) | |
5033 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
5034 | else | |
5035 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
5036 | sreloc = elf_section_data (input_section)->sreloc; | |
5037 | if (sreloc == NULL) | |
5038 | abort (); | |
59d6ffb2 | 5039 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
5040 | if (indx) |
5041 | continue; | |
5042 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5043 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 5044 | else |
eb4ff4d6 | 5045 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
5046 | } |
5047 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5048 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 5049 | else |
eb4ff4d6 | 5050 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5051 | break; |
5052 | ||
252b5132 RH |
5053 | default: |
5054 | break; | |
5055 | } | |
5056 | ||
239e1f3a AM |
5057 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5058 | because such sections are not SEC_ALLOC and thus ld.so will | |
5059 | not process them. */ | |
8c694914 | 5060 | if (unresolved_reloc |
239e1f3a | 5061 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5062 | && h->def_dynamic) |
5063 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5064 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
5065 | { |
5066 | (*_bfd_error_handler) | |
843fe662 | 5067 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
5068 | input_bfd, |
5069 | input_section, | |
6a30718d | 5070 | (long) rel->r_offset, |
843fe662 | 5071 | howto->name, |
6a30718d | 5072 | h->root.root.string); |
b34976b6 | 5073 | return FALSE; |
6a30718d | 5074 | } |
83be169b | 5075 | |
cbe950e9 | 5076 | do_relocation: |
252b5132 RH |
5077 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
5078 | contents, rel->r_offset, | |
55fd94b0 | 5079 | relocation, 0); |
252b5132 | 5080 | |
62d78908 | 5081 | check_relocation_error: |
cf5c0c5b | 5082 | if (r != bfd_reloc_ok) |
252b5132 | 5083 | { |
cf5c0c5b | 5084 | const char *name; |
ffb2e45b | 5085 | |
cf5c0c5b AM |
5086 | if (h != NULL) |
5087 | name = h->root.root.string; | |
5088 | else | |
5089 | { | |
5090 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5091 | symtab_hdr->sh_link, | |
5092 | sym->st_name); | |
5093 | if (name == NULL) | |
b34976b6 | 5094 | return FALSE; |
cf5c0c5b AM |
5095 | if (*name == '\0') |
5096 | name = bfd_section_name (input_bfd, sec); | |
5097 | } | |
ffb2e45b | 5098 | |
cf5c0c5b AM |
5099 | if (r == bfd_reloc_overflow) |
5100 | { | |
cf5c0c5b | 5101 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
5102 | (info, (h ? &h->root : NULL), name, howto->name, |
5103 | (bfd_vma) 0, input_bfd, input_section, | |
5104 | rel->r_offset))) | |
b34976b6 | 5105 | return FALSE; |
cf5c0c5b AM |
5106 | } |
5107 | else | |
5108 | { | |
5109 | (*_bfd_error_handler) | |
d003868e AM |
5110 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
5111 | input_bfd, input_section, | |
cf5c0c5b | 5112 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5113 | return FALSE; |
cf5c0c5b | 5114 | } |
252b5132 | 5115 | } |
60f2e42e L |
5116 | |
5117 | if (wrel != rel) | |
5118 | *wrel = *rel; | |
5119 | } | |
5120 | ||
5121 | if (wrel != rel) | |
5122 | { | |
5123 | Elf_Internal_Shdr *rel_hdr; | |
5124 | size_t deleted = rel - wrel; | |
5125 | ||
5126 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5127 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5128 | if (rel_hdr->sh_size == 0) | |
5129 | { | |
5130 | /* It is too late to remove an empty reloc section. Leave | |
5131 | one NONE reloc. | |
5132 | ??? What is wrong with an empty section??? */ | |
5133 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5134 | deleted -= 1; | |
5135 | } | |
5136 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5137 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5138 | input_section->reloc_count -= deleted; | |
252b5132 RH |
5139 | } |
5140 | ||
b34976b6 | 5141 | return TRUE; |
252b5132 RH |
5142 | } |
5143 | ||
5144 | /* Finish up dynamic symbol handling. We set the contents of various | |
5145 | dynamic sections here. */ | |
5146 | ||
b34976b6 | 5147 | static bfd_boolean |
55fd94b0 AM |
5148 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
5149 | struct bfd_link_info *info, | |
5150 | struct elf_link_hash_entry *h, | |
5151 | Elf_Internal_Sym *sym) | |
252b5132 | 5152 | { |
6725bdbf | 5153 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
5154 | unsigned plt_entry_size; |
5155 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 5156 | struct elf_i386_link_hash_entry *eh; |
aec6b87e | 5157 | bfd_boolean local_undefweak; |
252b5132 | 5158 | |
6725bdbf | 5159 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5160 | if (htab == NULL) |
5161 | return FALSE; | |
252b5132 | 5162 | |
25e762b9 RM |
5163 | abed = get_elf_i386_backend_data (output_bfd); |
5164 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
5165 | ||
dd7e64d4 L |
5166 | eh = (struct elf_i386_link_hash_entry *) h; |
5167 | ||
aec6b87e L |
5168 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5169 | resolved undefined weak symbols in executable so that their | |
5170 | references have value 0 at run-time. */ | |
5171 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, eh); | |
5172 | ||
252b5132 RH |
5173 | if (h->plt.offset != (bfd_vma) -1) |
5174 | { | |
252b5132 RH |
5175 | bfd_vma plt_index; |
5176 | bfd_vma got_offset; | |
947216bf AM |
5177 | Elf_Internal_Rela rel; |
5178 | bfd_byte *loc; | |
cbe950e9 L |
5179 | asection *plt, *gotplt, *relplt; |
5180 | ||
5181 | /* When building a static executable, use .iplt, .igot.plt and | |
5182 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5183 | if (htab->elf.splt != NULL) |
cbe950e9 | 5184 | { |
6de2ae4a L |
5185 | plt = htab->elf.splt; |
5186 | gotplt = htab->elf.sgotplt; | |
5187 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5188 | } |
5189 | else | |
5190 | { | |
6de2ae4a L |
5191 | plt = htab->elf.iplt; |
5192 | gotplt = htab->elf.igotplt; | |
5193 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5194 | } |
252b5132 RH |
5195 | |
5196 | /* This symbol has an entry in the procedure linkage table. Set | |
5197 | it up. */ | |
5198 | ||
cbe950e9 | 5199 | if ((h->dynindx == -1 |
aec6b87e | 5200 | && !local_undefweak |
0e1862bb | 5201 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5202 | && h->def_regular |
5203 | && h->type == STT_GNU_IFUNC)) | |
5204 | || plt == NULL | |
5205 | || gotplt == NULL | |
5206 | || relplt == NULL) | |
cec7f46a | 5207 | abort (); |
252b5132 RH |
5208 | |
5209 | /* Get the index in the procedure linkage table which | |
5210 | corresponds to this symbol. This is the index of this symbol | |
5211 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5212 | first entry in the procedure linkage table is reserved. |
252b5132 | 5213 | |
cbe950e9 | 5214 | Get the offset into the .got table of the entry that |
252b5132 | 5215 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 5216 | The first three are reserved. |
6bbec505 | 5217 | |
cbe950e9 L |
5218 | For static executables, we don't reserve anything. */ |
5219 | ||
6de2ae4a | 5220 | if (plt == htab->elf.splt) |
cbe950e9 | 5221 | { |
e1f98742 L |
5222 | got_offset = h->plt.offset / plt_entry_size - 1; |
5223 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
5224 | } |
5225 | else | |
5226 | { | |
e1f98742 L |
5227 | got_offset = h->plt.offset / plt_entry_size; |
5228 | got_offset = got_offset * 4; | |
cbe950e9 | 5229 | } |
252b5132 RH |
5230 | |
5231 | /* Fill in the entry in the procedure linkage table. */ | |
0e1862bb | 5232 | if (! bfd_link_pic (info)) |
252b5132 | 5233 | { |
25e762b9 RM |
5234 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
5235 | abed->plt->plt_entry_size); | |
252b5132 | 5236 | bfd_put_32 (output_bfd, |
cbe950e9 L |
5237 | (gotplt->output_section->vma |
5238 | + gotplt->output_offset | |
252b5132 | 5239 | + got_offset), |
25e762b9 RM |
5240 | plt->contents + h->plt.offset |
5241 | + abed->plt->plt_got_offset); | |
eac338cf | 5242 | |
25e762b9 | 5243 | if (abed->is_vxworks) |
eac338cf PB |
5244 | { |
5245 | int s, k, reloc_index; | |
5246 | ||
5247 | /* Create the R_386_32 relocation referencing the GOT | |
5248 | for this PLT entry. */ | |
5249 | ||
5250 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
5251 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
5252 | / abed->plt->plt_entry_size); | |
eac338cf | 5253 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 5254 | if (bfd_link_pic (info)) |
eac338cf PB |
5255 | k = PLTRESOLVE_RELOCS_SHLIB; |
5256 | else | |
5257 | k = PLTRESOLVE_RELOCS; | |
5258 | /* Skip the PLTresolve relocations, and the relocations for | |
5259 | the other PLT slots. */ | |
5260 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
5261 | loc = (htab->srelplt2->contents + reloc_index | |
5262 | * sizeof (Elf32_External_Rel)); | |
5263 | ||
6de2ae4a L |
5264 | rel.r_offset = (htab->elf.splt->output_section->vma |
5265 | + htab->elf.splt->output_offset | |
eac338cf | 5266 | + h->plt.offset + 2), |
7325306f | 5267 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5268 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
5269 | ||
5270 | /* Create the R_386_32 relocation referencing the beginning of | |
5271 | the PLT for this GOT entry. */ | |
6de2ae4a L |
5272 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
5273 | + htab->elf.sgotplt->output_offset | |
eac338cf | 5274 | + got_offset); |
7325306f | 5275 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 5276 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 5277 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 5278 | } |
252b5132 RH |
5279 | } |
5280 | else | |
5281 | { | |
25e762b9 RM |
5282 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
5283 | abed->plt->plt_entry_size); | |
252b5132 | 5284 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
5285 | plt->contents + h->plt.offset |
5286 | + abed->plt->plt_got_offset); | |
252b5132 RH |
5287 | } |
5288 | ||
aec6b87e L |
5289 | /* Fill in the entry in the global offset table. Leave the entry |
5290 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5291 | against undefined weak symbol in PIE. */ | |
5292 | if (!local_undefweak) | |
cbe950e9 | 5293 | { |
cbe950e9 | 5294 | bfd_put_32 (output_bfd, |
aec6b87e L |
5295 | (plt->output_section->vma |
5296 | + plt->output_offset | |
5297 | + h->plt.offset | |
5298 | + abed->plt->plt_lazy_offset), | |
cbe950e9 | 5299 | gotplt->contents + got_offset); |
252b5132 | 5300 | |
aec6b87e L |
5301 | /* Fill in the entry in the .rel.plt section. */ |
5302 | rel.r_offset = (gotplt->output_section->vma | |
5303 | + gotplt->output_offset | |
5304 | + got_offset); | |
5305 | if (h->dynindx == -1 | |
5306 | || ((bfd_link_executable (info) | |
5307 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5308 | && h->def_regular | |
5309 | && h->type == STT_GNU_IFUNC)) | |
5310 | { | |
5311 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
5312 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5313 | in the .got.plt section. */ | |
5314 | bfd_put_32 (output_bfd, | |
5315 | (h->root.u.def.value | |
5316 | + h->root.u.def.section->output_section->vma | |
5317 | + h->root.u.def.section->output_offset), | |
5318 | gotplt->contents + got_offset); | |
5319 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5320 | /* R_386_IRELATIVE comes last. */ | |
5321 | plt_index = htab->next_irelative_index--; | |
5322 | } | |
5323 | else | |
5324 | { | |
5325 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5326 | plt_index = htab->next_jump_slot_index++; | |
5327 | } | |
5328 | ||
5329 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5330 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5331 | ||
5332 | /* Don't fill PLT entry for static executables. */ | |
5333 | if (plt == htab->elf.splt) | |
5334 | { | |
5335 | bfd_put_32 (output_bfd, | |
5336 | plt_index * sizeof (Elf32_External_Rel), | |
5337 | plt->contents + h->plt.offset | |
5338 | + abed->plt->plt_reloc_offset); | |
5339 | bfd_put_32 (output_bfd, - (h->plt.offset | |
5340 | + abed->plt->plt_plt_offset + 4), | |
5341 | plt->contents + h->plt.offset | |
5342 | + abed->plt->plt_plt_offset); | |
5343 | } | |
e1f98742 | 5344 | } |
dd7e64d4 L |
5345 | } |
5346 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5347 | { | |
5348 | bfd_vma got_offset, plt_offset; | |
5349 | asection *plt, *got, *gotplt; | |
5350 | const bfd_byte *got_plt_entry; | |
5351 | ||
5352 | /* Offset of displacement of the indirect jump. */ | |
5353 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 5354 | |
dd7e64d4 L |
5355 | /* Set the entry in the GOT procedure linkage table. */ |
5356 | plt = htab->plt_got; | |
5357 | got = htab->elf.sgot; | |
5358 | gotplt = htab->elf.sgotplt; | |
5359 | got_offset = h->got.offset; | |
5360 | ||
5361 | if (got_offset == (bfd_vma) -1 | |
5362 | || plt == NULL | |
5363 | || got == NULL | |
5364 | || gotplt == NULL) | |
5365 | abort (); | |
5366 | ||
5367 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5368 | if (! bfd_link_pic (info)) |
252b5132 | 5369 | { |
dd7e64d4 L |
5370 | got_plt_entry = elf_i386_got_plt_entry; |
5371 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 5372 | } |
dd7e64d4 L |
5373 | else |
5374 | { | |
5375 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
5376 | got_offset += (got->output_section->vma | |
5377 | + got->output_offset | |
5378 | - gotplt->output_section->vma | |
5379 | - gotplt->output_offset); | |
5380 | } | |
5381 | ||
5382 | plt_offset = eh->plt_got.offset; | |
5383 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
5384 | sizeof (elf_i386_got_plt_entry)); | |
5385 | bfd_put_32 (output_bfd, got_offset, | |
5386 | plt->contents + plt_offset + plt_got_offset); | |
5387 | } | |
5388 | ||
aec6b87e L |
5389 | if (!local_undefweak |
5390 | && !h->def_regular | |
dd7e64d4 L |
5391 | && (h->plt.offset != (bfd_vma) -1 |
5392 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5393 | { | |
5394 | /* Mark the symbol as undefined, rather than as defined in | |
5395 | the .plt section. Leave the value if there were any | |
5396 | relocations where pointer equality matters (this is a clue | |
5397 | for the dynamic linker, to make function pointer | |
5398 | comparisons work between an application and shared | |
5399 | library), otherwise set it to zero. If a function is only | |
5400 | called from a binary, there is no need to slow down | |
5401 | shared libraries because of that. */ | |
5402 | sym->st_shndx = SHN_UNDEF; | |
5403 | if (!h->pointer_equality_needed) | |
5404 | sym->st_value = 0; | |
252b5132 RH |
5405 | } |
5406 | ||
aec6b87e L |
5407 | /* Don't generate dynamic GOT relocation against undefined weak |
5408 | symbol in executable. */ | |
13ae64f3 | 5409 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 5410 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
aec6b87e L |
5411 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 |
5412 | && !local_undefweak) | |
252b5132 | 5413 | { |
947216bf | 5414 | Elf_Internal_Rela rel; |
252b5132 RH |
5415 | |
5416 | /* This symbol has an entry in the global offset table. Set it | |
5417 | up. */ | |
5418 | ||
6de2ae4a | 5419 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5420 | abort (); |
252b5132 | 5421 | |
6de2ae4a L |
5422 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5423 | + htab->elf.sgot->output_offset | |
dc810e39 | 5424 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5425 | |
dd5724d5 AM |
5426 | /* If this is a static link, or it is a -Bsymbolic link and the |
5427 | symbol is defined locally or was forced to be local because | |
5428 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5429 | The entry in the global offset table will already have been |
5430 | initialized in the relocate_section function. */ | |
710ab287 | 5431 | if (h->def_regular |
0018b0a3 L |
5432 | && h->type == STT_GNU_IFUNC) |
5433 | { | |
0e1862bb | 5434 | if (bfd_link_pic (info)) |
710ab287 L |
5435 | { |
5436 | /* Generate R_386_GLOB_DAT. */ | |
5437 | goto do_glob_dat; | |
5438 | } | |
5439 | else | |
5440 | { | |
cd2b2c10 L |
5441 | asection *plt; |
5442 | ||
710ab287 L |
5443 | if (!h->pointer_equality_needed) |
5444 | abort (); | |
5445 | ||
5446 | /* For non-shared object, we can't use .got.plt, which | |
5447 | contains the real function addres if we need pointer | |
5448 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 5449 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5450 | bfd_put_32 (output_bfd, |
5451 | (plt->output_section->vma | |
5452 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 5453 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5454 | return TRUE; |
5455 | } | |
0018b0a3 | 5456 | } |
0e1862bb | 5457 | else if (bfd_link_pic (info) |
0018b0a3 | 5458 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5459 | { |
6725bdbf | 5460 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5461 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5462 | } | |
252b5132 RH |
5463 | else |
5464 | { | |
dd5724d5 | 5465 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5466 | do_glob_dat: |
6725bdbf | 5467 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5468 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5469 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5470 | } | |
5471 | ||
59d6ffb2 | 5472 | elf_append_rel (output_bfd, htab->elf.srelgot, &rel); |
252b5132 RH |
5473 | } |
5474 | ||
f5385ebf | 5475 | if (h->needs_copy) |
252b5132 | 5476 | { |
947216bf | 5477 | Elf_Internal_Rela rel; |
252b5132 RH |
5478 | |
5479 | /* This symbol needs a copy reloc. Set it up. */ | |
5480 | ||
ffb2e45b AM |
5481 | if (h->dynindx == -1 |
5482 | || (h->root.type != bfd_link_hash_defined | |
5483 | && h->root.type != bfd_link_hash_defweak) | |
5484 | || htab->srelbss == NULL) | |
5485 | abort (); | |
252b5132 RH |
5486 | |
5487 | rel.r_offset = (h->root.u.def.value | |
5488 | + h->root.u.def.section->output_section->vma | |
5489 | + h->root.u.def.section->output_offset); | |
5490 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
59d6ffb2 | 5491 | elf_append_rel (output_bfd, htab->srelbss, &rel); |
252b5132 RH |
5492 | } |
5493 | ||
b34976b6 | 5494 | return TRUE; |
252b5132 RH |
5495 | } |
5496 | ||
c25bc9fc L |
5497 | /* Finish up local dynamic symbol handling. We set the contents of |
5498 | various dynamic sections here. */ | |
5499 | ||
5500 | static bfd_boolean | |
5501 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5502 | { | |
5503 | struct elf_link_hash_entry *h | |
5504 | = (struct elf_link_hash_entry *) *slot; | |
5505 | struct bfd_link_info *info | |
23209a78 | 5506 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5507 | |
5508 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5509 | h, NULL); | |
5510 | } | |
5511 | ||
aec6b87e L |
5512 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5513 | here since undefined weak symbol may not be dynamic and may not be | |
5514 | called for elf_i386_finish_dynamic_symbol. */ | |
5515 | ||
5516 | static bfd_boolean | |
5517 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5518 | void *inf) | |
5519 | { | |
5520 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5521 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5522 | ||
5523 | if (h->root.type != bfd_link_hash_undefweak | |
5524 | || h->dynindx != -1) | |
5525 | return TRUE; | |
5526 | ||
5527 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5528 | info, h, NULL); | |
5529 | } | |
5530 | ||
38701953 AM |
5531 | /* Used to decide how to sort relocs in an optimal manner for the |
5532 | dynamic linker, before writing them out. */ | |
5533 | ||
5534 | static enum elf_reloc_type_class | |
cae1fbbb | 5535 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5536 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5537 | const Elf_Internal_Rela *rela) | |
38701953 | 5538 | { |
cae1fbbb L |
5539 | bfd *abfd = info->output_bfd; |
5540 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5541 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5542 | |
d9e3b590 L |
5543 | if (htab->dynsym != NULL |
5544 | && htab->dynsym->contents != NULL) | |
5545 | { | |
5546 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5547 | dynamic symbols. */ | |
5548 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
5549 | Elf_Internal_Sym sym; | |
5550 | if (!bed->s->swap_symbol_in (abfd, | |
5551 | (htab->dynsym->contents | |
5552 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5553 | 0, &sym)) | |
5554 | abort (); | |
5555 | ||
5556 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) | |
5557 | return reloc_class_ifunc; | |
5558 | } | |
cae1fbbb | 5559 | |
55fd94b0 | 5560 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
5561 | { |
5562 | case R_386_RELATIVE: | |
5563 | return reloc_class_relative; | |
5564 | case R_386_JUMP_SLOT: | |
5565 | return reloc_class_plt; | |
5566 | case R_386_COPY: | |
5567 | return reloc_class_copy; | |
5568 | default: | |
5569 | return reloc_class_normal; | |
5570 | } | |
5571 | } | |
5572 | ||
252b5132 RH |
5573 | /* Finish up the dynamic sections. */ |
5574 | ||
b34976b6 | 5575 | static bfd_boolean |
55fd94b0 AM |
5576 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5577 | struct bfd_link_info *info) | |
252b5132 | 5578 | { |
6725bdbf | 5579 | struct elf_i386_link_hash_table *htab; |
252b5132 | 5580 | bfd *dynobj; |
252b5132 | 5581 | asection *sdyn; |
25e762b9 | 5582 | const struct elf_i386_backend_data *abed; |
252b5132 | 5583 | |
6725bdbf | 5584 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5585 | if (htab == NULL) |
5586 | return FALSE; | |
5587 | ||
ebe50bae | 5588 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5589 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5590 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5591 | |
ebe50bae | 5592 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5593 | { |
252b5132 RH |
5594 | Elf32_External_Dyn *dyncon, *dynconend; |
5595 | ||
6de2ae4a | 5596 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5597 | abort (); |
252b5132 RH |
5598 | |
5599 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5600 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5601 | for (; dyncon < dynconend; dyncon++) |
5602 | { | |
5603 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5604 | asection *s; |
252b5132 RH |
5605 | |
5606 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5607 | ||
5608 | switch (dyn.d_tag) | |
5609 | { | |
5610 | default: | |
25e762b9 RM |
5611 | if (abed->is_vxworks |
5612 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 5613 | break; |
0ac8d2ca | 5614 | continue; |
252b5132 RH |
5615 | |
5616 | case DT_PLTGOT: | |
6de2ae4a | 5617 | s = htab->elf.sgotplt; |
8c37241b | 5618 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5619 | break; |
5620 | ||
252b5132 | 5621 | case DT_JMPREL: |
6de2ae4a | 5622 | s = htab->elf.srelplt; |
6348e046 | 5623 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5624 | break; |
5625 | ||
5626 | case DT_PLTRELSZ: | |
6de2ae4a | 5627 | s = htab->elf.srelplt; |
eea6121a | 5628 | dyn.d_un.d_val = s->size; |
252b5132 RH |
5629 | break; |
5630 | ||
5631 | case DT_RELSZ: | |
5632 | /* My reading of the SVR4 ABI indicates that the | |
5633 | procedure linkage table relocs (DT_JMPREL) should be | |
5634 | included in the overall relocs (DT_REL). This is | |
5635 | what Solaris does. However, UnixWare can not handle | |
5636 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 5637 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 5638 | s = htab->elf.srelplt; |
6348e046 AM |
5639 | if (s == NULL) |
5640 | continue; | |
eea6121a | 5641 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
5642 | break; |
5643 | ||
5644 | case DT_REL: | |
5645 | /* We may not be using the standard ELF linker script. | |
5646 | If .rel.plt is the first .rel section, we adjust | |
5647 | DT_REL to not include it. */ | |
6de2ae4a | 5648 | s = htab->elf.srelplt; |
6348e046 AM |
5649 | if (s == NULL) |
5650 | continue; | |
5651 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
5652 | continue; | |
eea6121a | 5653 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
5654 | break; |
5655 | } | |
0ac8d2ca AM |
5656 | |
5657 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5658 | } |
5659 | ||
5660 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5661 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5662 | { |
0e1862bb | 5663 | if (bfd_link_pic (info)) |
eac338cf | 5664 | { |
25e762b9 RM |
5665 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5666 | abed->plt->plt0_entry_size); | |
5667 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5668 | abed->plt0_pad_byte, | |
5669 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5670 | } |
252b5132 RH |
5671 | else |
5672 | { | |
25e762b9 RM |
5673 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5674 | abed->plt->plt0_entry_size); | |
5675 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5676 | abed->plt0_pad_byte, | |
5677 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5678 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5679 | (htab->elf.sgotplt->output_section->vma |
5680 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5681 | + 4), |
25e762b9 RM |
5682 | htab->elf.splt->contents |
5683 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5684 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5685 | (htab->elf.sgotplt->output_section->vma |
5686 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5687 | + 8), |
25e762b9 RM |
5688 | htab->elf.splt->contents |
5689 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5690 | |
25e762b9 | 5691 | if (abed->is_vxworks) |
eac338cf PB |
5692 | { |
5693 | Elf_Internal_Rela rel; | |
7325306f | 5694 | |
eac338cf PB |
5695 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5696 | On IA32 we use REL relocations so the addend goes in | |
5697 | the PLT directly. */ | |
6de2ae4a L |
5698 | rel.r_offset = (htab->elf.splt->output_section->vma |
5699 | + htab->elf.splt->output_offset | |
25e762b9 | 5700 | + abed->plt->plt0_got1_offset); |
7325306f | 5701 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5702 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5703 | htab->srelplt2->contents); | |
5704 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5705 | rel.r_offset = (htab->elf.splt->output_section->vma |
5706 | + htab->elf.splt->output_offset | |
25e762b9 | 5707 | + abed->plt->plt0_got2_offset); |
7325306f | 5708 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5709 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5710 | htab->srelplt2->contents + | |
5711 | sizeof (Elf32_External_Rel)); | |
5712 | } | |
252b5132 RH |
5713 | } |
5714 | ||
5715 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5716 | really seem like the right value. */ | |
6de2ae4a | 5717 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5718 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5719 | |
5720 | /* Correct the .rel.plt.unloaded relocations. */ | |
0e1862bb | 5721 | if (abed->is_vxworks && !bfd_link_pic (info)) |
eac338cf | 5722 | { |
25e762b9 RM |
5723 | int num_plts = (htab->elf.splt->size |
5724 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5725 | unsigned char *p; |
eac338cf PB |
5726 | |
5727 | p = htab->srelplt2->contents; | |
0e1862bb | 5728 | if (bfd_link_pic (info)) |
eac338cf PB |
5729 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); |
5730 | else | |
5731 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5732 | ||
5733 | for (; num_plts; num_plts--) | |
5734 | { | |
5735 | Elf_Internal_Rela rel; | |
5736 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5737 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5738 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5739 | p += sizeof (Elf32_External_Rel); | |
5740 | ||
5741 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5742 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5743 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5744 | p += sizeof (Elf32_External_Rel); | |
5745 | } | |
5746 | } | |
252b5132 RH |
5747 | } |
5748 | } | |
5749 | ||
6de2ae4a | 5750 | if (htab->elf.sgotplt) |
252b5132 | 5751 | { |
56d4289c L |
5752 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5753 | { | |
5754 | (*_bfd_error_handler) | |
5755 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5756 | return FALSE; | |
5757 | } | |
5758 | ||
12d0ee4a | 5759 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5760 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5761 | { |
5762 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5763 | (sdyn == NULL ? 0 |
12d0ee4a | 5764 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5765 | htab->elf.sgotplt->contents); |
5766 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5767 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5768 | } |
252b5132 | 5769 | |
6de2ae4a | 5770 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5771 | } |
8c37241b | 5772 | |
e41b3a13 | 5773 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5774 | if (htab->plt_eh_frame != NULL |
5775 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5776 | { |
5777 | if (htab->elf.splt != NULL | |
5778 | && htab->elf.splt->size != 0 | |
5779 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5780 | && htab->elf.splt->output_section != NULL | |
5781 | && htab->plt_eh_frame->output_section != NULL) | |
5782 | { | |
5783 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5784 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5785 | + htab->plt_eh_frame->output_offset | |
5786 | + PLT_FDE_START_OFFSET; | |
5787 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5788 | htab->plt_eh_frame->contents | |
5789 | + PLT_FDE_START_OFFSET); | |
5790 | } | |
5791 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5792 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5793 | { |
5794 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5795 | htab->plt_eh_frame, | |
5796 | htab->plt_eh_frame->contents)) | |
5797 | return FALSE; | |
5798 | } | |
5799 | } | |
5800 | ||
6de2ae4a L |
5801 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5802 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5803 | |
c25bc9fc L |
5804 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5805 | htab_traverse (htab->loc_hash_table, | |
5806 | elf_i386_finish_local_dynamic_symbol, | |
5807 | info); | |
5808 | ||
aec6b87e L |
5809 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5810 | if (bfd_link_pie (info)) | |
5811 | bfd_hash_traverse (&info->hash->table, | |
5812 | elf_i386_pie_finish_undefweak_symbol, | |
5813 | info); | |
5814 | ||
b34976b6 | 5815 | return TRUE; |
252b5132 RH |
5816 | } |
5817 | ||
3972882e | 5818 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5819 | |
3972882e L |
5820 | static bfd_vma * |
5821 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5822 | asection *relplt) | |
4c45e5c9 | 5823 | { |
3972882e L |
5824 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5825 | arelent *p; | |
5826 | long count, i; | |
5827 | bfd_vma *plt_sym_val; | |
144bed8d | 5828 | bfd_vma plt_offset; |
3972882e L |
5829 | bfd_byte *plt_contents; |
5830 | const struct elf_i386_backend_data *bed | |
5831 | = get_elf_i386_backend_data (abfd); | |
5832 | Elf_Internal_Shdr *hdr; | |
5833 | ||
5834 | /* Get the .plt section contents. */ | |
5835 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5836 | if (plt_contents == NULL) | |
5837 | return NULL; | |
5838 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5839 | plt_contents, 0, plt->size)) | |
5840 | { | |
5841 | bad_return: | |
5842 | free (plt_contents); | |
5843 | return NULL; | |
5844 | } | |
144bed8d | 5845 | |
3972882e L |
5846 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5847 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5848 | goto bad_return; | |
144bed8d | 5849 | |
3972882e L |
5850 | hdr = &elf_section_data (relplt)->this_hdr; |
5851 | count = relplt->size / hdr->sh_entsize; | |
5852 | ||
5853 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
5854 | if (plt_sym_val == NULL) | |
5855 | goto bad_return; | |
cca5b8b6 | 5856 | |
35181b3e | 5857 | for (i = 0; i < count; i++) |
3972882e | 5858 | plt_sym_val[i] = -1; |
cca5b8b6 | 5859 | |
3972882e L |
5860 | plt_offset = bed->plt->plt_entry_size; |
5861 | p = relplt->relocation; | |
5862 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5863 | { |
3972882e L |
5864 | long reloc_index; |
5865 | ||
6f25f223 | 5866 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 5867 | if (p->howto == NULL) |
6f25f223 | 5868 | continue; |
533d0af0 L |
5869 | |
5870 | if (p->howto->type != R_386_JUMP_SLOT | |
5871 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
5872 | continue; |
5873 | ||
5874 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
5875 | + bed->plt->plt_reloc_offset)); | |
5876 | reloc_index /= sizeof (Elf32_External_Rel); | |
ec1f73bb AM |
5877 | if (reloc_index < count) |
5878 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
5879 | ||
144bed8d | 5880 | plt_offset += bed->plt->plt_entry_size; |
fca6ae69 L |
5881 | |
5882 | /* PR binutils/18437: Skip extra relocations in the .rel.plt | |
5883 | section. */ | |
5884 | if (plt_offset >= plt->size) | |
5885 | break; | |
144bed8d L |
5886 | } |
5887 | ||
3972882e L |
5888 | free (plt_contents); |
5889 | ||
5890 | return plt_sym_val; | |
5891 | } | |
5892 | ||
5893 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
5894 | ||
5895 | static long | |
5896 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
5897 | long symcount, | |
5898 | asymbol **syms, | |
5899 | long dynsymcount, | |
5900 | asymbol **dynsyms, | |
5901 | asymbol **ret) | |
5902 | { | |
5903 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
5904 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
5905 | dynsymcount, dynsyms, ret, | |
5906 | plt, | |
5907 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
5908 | } |
5909 | ||
fdc90cb4 JJ |
5910 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5911 | ||
5912 | static bfd_boolean | |
5913 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
5914 | { | |
5915 | if (h->plt.offset != (bfd_vma) -1 | |
5916 | && !h->def_regular | |
5917 | && !h->pointer_equality_needed) | |
5918 | return FALSE; | |
5919 | ||
5920 | return _bfd_elf_hash_symbol (h); | |
5921 | } | |
4c45e5c9 | 5922 | |
d8045f23 NC |
5923 | /* Hook called by the linker routine which adds symbols from an object |
5924 | file. */ | |
5925 | ||
5926 | static bfd_boolean | |
c16153ae | 5927 | elf_i386_add_symbol_hook (bfd * abfd, |
f1885d1e | 5928 | struct bfd_link_info * info, |
d8045f23 NC |
5929 | Elf_Internal_Sym * sym, |
5930 | const char ** namep ATTRIBUTE_UNUSED, | |
5931 | flagword * flagsp ATTRIBUTE_UNUSED, | |
5932 | asection ** secp ATTRIBUTE_UNUSED, | |
5933 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
5934 | { | |
13a2df29 | 5935 | if (ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE |
f1885d1e AM |
5936 | && (abfd->flags & DYNAMIC) == 0 |
5937 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
13a2df29 L |
5938 | elf_tdata (info->output_bfd)->has_gnu_symbols |
5939 | |= elf_gnu_symbol_unique; | |
d8045f23 NC |
5940 | |
5941 | return TRUE; | |
5942 | } | |
5943 | ||
6d00b590 | 5944 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
5945 | #define TARGET_LITTLE_NAME "elf32-i386" |
5946 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5947 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5948 | #define ELF_MACHINE_CODE EM_386 |
5949 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5950 | |
5951 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5952 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5953 | #define elf_backend_want_got_plt 1 |
5954 | #define elf_backend_plt_readonly 1 | |
5955 | #define elf_backend_want_plt_sym 0 | |
5956 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5957 | #define elf_backend_plt_alignment 4 |
f7483970 | 5958 | #define elf_backend_extern_protected_data 1 |
252b5132 | 5959 | |
8c29f035 AM |
5960 | /* Support RELA for objdump of prelink objects. */ |
5961 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5962 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5963 | ||
13ae64f3 | 5964 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5965 | |
dd5724d5 AM |
5966 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
5967 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
5968 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 5969 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 5970 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
5971 | |
5972 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5973 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5974 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 5975 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 5976 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 5977 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5978 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5979 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
5980 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
5981 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
5982 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5983 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5984 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5985 | #define elf_backend_relocate_section elf_i386_relocate_section |
5986 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 5987 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
5988 | #define elf_backend_omit_section_dynsym \ |
5989 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 5990 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 | 5991 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
aec6b87e | 5992 | #define elf_backend_fixup_symbol elf_i386_fixup_symbol |
dd5724d5 | 5993 | |
252b5132 | 5994 | #include "elf32-target.h" |
2bc3c89a AM |
5995 | |
5996 | /* FreeBSD support. */ | |
5997 | ||
5998 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5999 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
6000 | #undef TARGET_LITTLE_NAME |
6001 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
6002 | #undef ELF_OSABI |
6003 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
6004 | |
6005 | /* The kernel recognizes executables as valid only if they carry a | |
6006 | "FreeBSD" label in the ELF header. So we put this label on all | |
6007 | executables and (for simplicity) also all other object files. */ | |
6008 | ||
2bc3c89a | 6009 | static void |
d8045f23 | 6010 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 6011 | { |
78245035 | 6012 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 6013 | |
2bc3c89a | 6014 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
6015 | { |
6016 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
6017 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6018 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
6019 | } | |
caf47ea6 | 6020 | #endif |
2bc3c89a AM |
6021 | } |
6022 | ||
6023 | #undef elf_backend_post_process_headers | |
d8045f23 | 6024 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
6025 | #undef elf32_bed |
6026 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 6027 | |
d8045f23 NC |
6028 | #undef elf_backend_add_symbol_hook |
6029 | ||
2bc3c89a | 6030 | #include "elf32-target.h" |
eac338cf | 6031 | |
a6cc6b3b RO |
6032 | /* Solaris 2. */ |
6033 | ||
6034 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6035 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
6036 | #undef TARGET_LITTLE_NAME |
6037 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
6038 | ||
914082d1 L |
6039 | #undef elf_backend_post_process_headers |
6040 | ||
a6cc6b3b RO |
6041 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
6042 | objects won't be recognized. */ | |
6043 | #undef ELF_OSABI | |
6044 | ||
6045 | #undef elf32_bed | |
6046 | #define elf32_bed elf32_i386_sol2_bed | |
6047 | ||
7dc98aea RO |
6048 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
6049 | boundary. */ | |
6050 | #undef elf_backend_static_tls_alignment | |
6051 | #define elf_backend_static_tls_alignment 8 | |
6052 | ||
a6cc6b3b RO |
6053 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6054 | ||
6055 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6056 | File, p.63. */ | |
6057 | #undef elf_backend_want_plt_sym | |
6058 | #define elf_backend_want_plt_sym 1 | |
6059 | ||
6060 | #include "elf32-target.h" | |
6061 | ||
bf64a951 L |
6062 | /* Intel MCU support. */ |
6063 | ||
6064 | static bfd_boolean | |
6065 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6066 | { | |
6067 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6068 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6069 | return TRUE; | |
6070 | } | |
6071 | ||
6072 | #undef TARGET_LITTLE_SYM | |
6073 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6074 | #undef TARGET_LITTLE_NAME | |
6075 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
6076 | #undef ELF_ARCH | |
6077 | #define ELF_ARCH bfd_arch_iamcu | |
6078 | ||
6079 | #undef ELF_MACHINE_CODE | |
6080 | #define ELF_MACHINE_CODE EM_IAMCU | |
6081 | ||
6082 | #undef ELF_OSABI | |
6083 | ||
6084 | #undef elf32_bed | |
6085 | #define elf32_bed elf32_iamcu_bed | |
6086 | ||
6087 | #undef elf_backend_object_p | |
6088 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6089 | ||
6090 | #undef elf_backend_static_tls_alignment | |
6091 | ||
6092 | #undef elf_backend_want_plt_sym | |
6093 | #define elf_backend_want_plt_sym 0 | |
6094 | ||
6095 | #include "elf32-target.h" | |
6096 | ||
6097 | /* Restore defaults. */ | |
6098 | #undef ELF_ARCH | |
6099 | #define ELF_ARCH bfd_arch_i386 | |
6100 | #undef ELF_MACHINE_CODE | |
6101 | #define ELF_MACHINE_CODE EM_386 | |
6102 | ||
a27e4371 RM |
6103 | /* Native Client support. */ |
6104 | ||
6105 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6106 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6107 | #undef TARGET_LITTLE_NAME |
6108 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6109 | #undef elf32_bed | |
6110 | #define elf32_bed elf32_i386_nacl_bed | |
6111 | ||
6112 | #undef ELF_MAXPAGESIZE | |
6113 | #define ELF_MAXPAGESIZE 0x10000 | |
6114 | ||
6115 | /* Restore defaults. */ | |
6116 | #undef ELF_OSABI | |
6117 | #undef elf_backend_want_plt_sym | |
6118 | #define elf_backend_want_plt_sym 0 | |
6119 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6120 | #undef elf_backend_static_tls_alignment |
6121 | ||
6122 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6123 | ||
6124 | #undef elf_backend_plt_alignment | |
6125 | #define elf_backend_plt_alignment 5 | |
6126 | #define NACL_PLT_ENTRY_SIZE 64 | |
6127 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6128 | ||
6129 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6130 | { | |
6131 | 0xff, 0x35, /* pushl contents of address */ | |
6132 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6133 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6134 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6135 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6136 | 0xff, 0xe1 /* jmp *%ecx */ | |
6137 | }; | |
6138 | ||
6139 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6140 | { | |
6141 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6142 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6143 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6144 | 0xff, 0xe1, /* jmp *%ecx */ | |
6145 | ||
6146 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6147 | 0x90, | |
6148 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6149 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6150 | ||
6151 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6152 | 0x68, /* pushl immediate */ | |
6153 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6154 | 0xe9, /* jmp relative */ | |
6155 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6156 | ||
6157 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6158 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6159 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6160 | 0x90, 0x90 | |
6161 | }; | |
6162 | ||
6163 | static const bfd_byte | |
6164 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6165 | { | |
6166 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6167 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6168 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6169 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6170 | |
6171 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6172 | so pad to that size with nop instructions. */ | |
6173 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6174 | }; |
6175 | ||
6176 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6177 | { | |
6178 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6179 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6180 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6181 | 0xff, 0xe1, /* jmp *%ecx */ | |
6182 | ||
6183 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6184 | 0x90, | |
6185 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6186 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6187 | ||
6188 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6189 | 0x68, /* pushl immediate */ | |
6190 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6191 | 0xe9, /* jmp relative */ | |
6192 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6193 | ||
6194 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6195 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6196 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6197 | 0x90, 0x90 | |
6198 | }; | |
6199 | ||
6200 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
6201 | { | |
6202 | #if (PLT_CIE_LENGTH != 20 \ | |
6203 | || PLT_FDE_LENGTH != 36 \ | |
6204 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
6205 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
6206 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
6207 | #endif | |
6208 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
6209 | 0, 0, 0, 0, /* CIE ID */ | |
6210 | 1, /* CIE version */ | |
6211 | 'z', 'R', 0, /* Augmentation string */ | |
6212 | 1, /* Code alignment factor */ | |
6213 | 0x7c, /* Data alignment factor: -4 */ | |
6214 | 8, /* Return address column */ | |
6215 | 1, /* Augmentation size */ | |
6216 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
6217 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
6218 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
6219 | DW_CFA_nop, DW_CFA_nop, | |
6220 | ||
6221 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
6222 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
6223 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
6224 | 0, 0, 0, 0, /* .plt size goes here */ | |
6225 | 0, /* Augmentation size */ | |
6226 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
6227 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
6228 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
6229 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
6230 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
6231 | 13, /* Block length */ | |
6232 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
6233 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
6234 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
6235 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
6236 | DW_CFA_nop, DW_CFA_nop | |
6237 | }; | |
6238 | ||
6239 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
6240 | { | |
6241 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
6242 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
6243 | 2, /* plt0_got1_offset */ | |
6244 | 8, /* plt0_got2_offset */ | |
6245 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
6246 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
6247 | 2, /* plt_got_offset */ | |
6248 | 33, /* plt_reloc_offset */ | |
6249 | 38, /* plt_plt_offset */ | |
6250 | 32, /* plt_lazy_offset */ | |
6251 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
6252 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
6253 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
6254 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
6255 | }; | |
6256 | ||
6257 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
6258 | { | |
6259 | &elf_i386_nacl_plt, /* plt */ | |
6260 | 0x90, /* plt0_pad_byte: nop insn */ | |
6261 | 0, /* is_vxworks */ | |
6262 | }; | |
6263 | ||
64b384e1 RM |
6264 | static bfd_boolean |
6265 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
6266 | { | |
6267 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
6268 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
6269 | return TRUE; | |
6270 | } | |
6271 | ||
a27e4371 RM |
6272 | #undef elf_backend_arch_data |
6273 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
6274 | ||
64b384e1 RM |
6275 | #undef elf_backend_object_p |
6276 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
6277 | #undef elf_backend_modify_segment_map |
6278 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
6279 | #undef elf_backend_modify_program_headers | |
6280 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
6281 | #undef elf_backend_final_write_processing |
6282 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 6283 | |
a27e4371 RM |
6284 | #include "elf32-target.h" |
6285 | ||
5a68afcf | 6286 | /* Restore defaults. */ |
64b384e1 | 6287 | #undef elf_backend_object_p |
5a68afcf RM |
6288 | #undef elf_backend_modify_segment_map |
6289 | #undef elf_backend_modify_program_headers | |
887badb3 | 6290 | #undef elf_backend_final_write_processing |
5a68afcf | 6291 | |
eac338cf PB |
6292 | /* VxWorks support. */ |
6293 | ||
6294 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6295 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
6296 | #undef TARGET_LITTLE_NAME |
6297 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 6298 | #undef ELF_OSABI |
a27e4371 RM |
6299 | #undef elf_backend_plt_alignment |
6300 | #define elf_backend_plt_alignment 4 | |
eac338cf | 6301 | |
23209a78 RM |
6302 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
6303 | { | |
25e762b9 | 6304 | &elf_i386_plt, /* plt */ |
23209a78 RM |
6305 | 0x90, /* plt0_pad_byte */ |
6306 | 1, /* is_vxworks */ | |
6307 | }; | |
eac338cf | 6308 | |
23209a78 RM |
6309 | #undef elf_backend_arch_data |
6310 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 6311 | |
13285a1b | 6312 | #undef elf_backend_relocs_compatible |
eac338cf PB |
6313 | #undef elf_backend_add_symbol_hook |
6314 | #define elf_backend_add_symbol_hook \ | |
6315 | elf_vxworks_add_symbol_hook | |
6316 | #undef elf_backend_link_output_symbol_hook | |
6317 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 6318 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
6319 | #undef elf_backend_emit_relocs |
6320 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
6321 | #undef elf_backend_final_write_processing | |
6322 | #define elf_backend_final_write_processing \ | |
6323 | elf_vxworks_final_write_processing | |
7dc98aea | 6324 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
6325 | |
6326 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
6327 | define it. */ | |
6328 | #undef elf_backend_want_plt_sym | |
6329 | #define elf_backend_want_plt_sym 1 | |
6330 | ||
6331 | #undef elf32_bed | |
6332 | #define elf32_bed elf32_i386_vxworks_bed | |
6333 | ||
6334 | #include "elf32-target.h" |