Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
b90efa5b | 2 | Copyright (C) 1993-2015 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" |
252b5132 | 32 | |
55fd94b0 AM |
33 | /* 386 uses REL relocations instead of RELA. */ |
34 | #define USE_REL 1 | |
252b5132 RH |
35 | |
36 | #include "elf/i386.h" | |
37 | ||
38 | static reloc_howto_type elf_howto_table[]= | |
39 | { | |
6346d5ca | 40 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 41 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
42 | TRUE, 0x00000000, 0x00000000, FALSE), |
43 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 44 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
45 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
46 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 47 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
48 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
49 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 50 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
51 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
52 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 53 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
54 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
55 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 56 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
57 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
58 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 59 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
60 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
61 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 62 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
63 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
64 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 65 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
66 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
67 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 68 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
69 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
70 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 71 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 72 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 73 | |
dc47f327 AM |
74 | /* We have a gap in the reloc numbers here. |
75 | R_386_standard counts the number up to this point, and | |
76 | R_386_ext_offset is the value to subtract from a reloc type of | |
77 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
78 | #define R_386_standard (R_386_GOTPC + 1) |
79 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 80 | |
37e55690 | 81 | /* These relocs are a GNU extension. */ |
b34976b6 | 82 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 83 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
84 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
85 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 86 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
87 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
88 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 89 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
90 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
91 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 92 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
93 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
94 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 95 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
96 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
97 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 98 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
99 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
100 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 101 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 102 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 103 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 104 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
105 | TRUE, 0xffff, 0xffff, TRUE), |
106 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 107 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
108 | TRUE, 0xff, 0xff, FALSE), |
109 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 110 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 111 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 112 | |
55fd94b0 AM |
113 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
114 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 115 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 116 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 117 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
118 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
119 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 120 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
121 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
122 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 123 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
124 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
125 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 126 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
127 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
128 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 129 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
130 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
131 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 132 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 133 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
134 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
135 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
136 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
137 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
138 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
139 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
140 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
141 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
142 | FALSE, 0, 0, FALSE), | |
143 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
145 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
146 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
147 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
148 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
149 | |
150 | /* Another gap. */ | |
cbe950e9 L |
151 | #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset) |
152 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative) | |
252b5132 RH |
153 | |
154 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
155 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
156 | 0, /* rightshift */ | |
157 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
158 | 0, /* bitsize */ | |
b34976b6 | 159 | FALSE, /* pc_relative */ |
252b5132 RH |
160 | 0, /* bitpos */ |
161 | complain_overflow_dont, /* complain_on_overflow */ | |
162 | NULL, /* special_function */ | |
163 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 164 | FALSE, /* partial_inplace */ |
252b5132 RH |
165 | 0, /* src_mask */ |
166 | 0, /* dst_mask */ | |
b34976b6 | 167 | FALSE), /* pcrel_offset */ |
252b5132 RH |
168 | |
169 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
170 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
171 | 0, /* rightshift */ | |
172 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
173 | 0, /* bitsize */ | |
b34976b6 | 174 | FALSE, /* pc_relative */ |
252b5132 RH |
175 | 0, /* bitpos */ |
176 | complain_overflow_dont, /* complain_on_overflow */ | |
177 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
178 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 179 | FALSE, /* partial_inplace */ |
252b5132 RH |
180 | 0, /* src_mask */ |
181 | 0, /* dst_mask */ | |
b34976b6 | 182 | FALSE) /* pcrel_offset */ |
dc47f327 | 183 | |
55fd94b0 | 184 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
185 | |
186 | }; | |
187 | ||
252b5132 | 188 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
189 | #define TRACE(str) \ |
190 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
191 | #else |
192 | #define TRACE(str) | |
193 | #endif | |
194 | ||
195 | static reloc_howto_type * | |
55fd94b0 AM |
196 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
197 | bfd_reloc_code_real_type code) | |
252b5132 RH |
198 | { |
199 | switch (code) | |
200 | { | |
201 | case BFD_RELOC_NONE: | |
202 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 203 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
204 | |
205 | case BFD_RELOC_32: | |
206 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_CTOR: | |
210 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_32_PCREL: | |
214 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_386_GOT32: | |
218 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_PLT32: | |
222 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_COPY: | |
226 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_GLOB_DAT: | |
230 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_JUMP_SLOT: | |
234 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_RELATIVE: | |
238 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_GOTOFF: | |
242 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTPC: | |
246 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 248 | |
37e55690 JJ |
249 | /* These relocs are a GNU extension. */ |
250 | case BFD_RELOC_386_TLS_TPOFF: | |
251 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 252 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
253 | |
254 | case BFD_RELOC_386_TLS_IE: | |
255 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_GOTIE: | |
259 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 261 | |
13ae64f3 JJ |
262 | case BFD_RELOC_386_TLS_LE: |
263 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
265 | |
266 | case BFD_RELOC_386_TLS_GD: | |
267 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_LDM: | |
271 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 273 | |
252b5132 RH |
274 | case BFD_RELOC_16: |
275 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
277 | |
278 | case BFD_RELOC_16_PCREL: | |
279 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_8: | |
283 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8_PCREL: | |
287 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 289 | |
13ae64f3 JJ |
290 | /* Common with Sun TLS implementation. */ |
291 | case BFD_RELOC_386_TLS_LDO_32: | |
292 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 293 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
294 | |
295 | case BFD_RELOC_386_TLS_IE_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_LE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_DTPMOD32: | |
304 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPOFF32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_TPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 314 | |
1788fc08 L |
315 | case BFD_RELOC_SIZE32: |
316 | TRACE ("BFD_RELOC_SIZE32"); | |
317 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
318 | ||
67a4f2b7 AO |
319 | case BFD_RELOC_386_TLS_GOTDESC: |
320 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
321 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
322 | ||
323 | case BFD_RELOC_386_TLS_DESC_CALL: | |
324 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
325 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DESC: | |
328 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
329 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
330 | ||
cbe950e9 L |
331 | case BFD_RELOC_386_IRELATIVE: |
332 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 333 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 334 | |
252b5132 RH |
335 | case BFD_RELOC_VTABLE_INHERIT: |
336 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 337 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
338 | |
339 | case BFD_RELOC_VTABLE_ENTRY: | |
340 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 341 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
342 | |
343 | default: | |
344 | break; | |
345 | } | |
346 | ||
347 | TRACE ("Unknown"); | |
348 | return 0; | |
349 | } | |
350 | ||
157090f7 AM |
351 | static reloc_howto_type * |
352 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
353 | const char *r_name) | |
354 | { | |
355 | unsigned int i; | |
356 | ||
357 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
358 | if (elf_howto_table[i].name != NULL | |
359 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
360 | return &elf_howto_table[i]; | |
361 | ||
362 | return NULL; | |
363 | } | |
364 | ||
142411ca L |
365 | static reloc_howto_type * |
366 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 367 | { |
dc47f327 AM |
368 | unsigned int indx; |
369 | ||
370 | if ((indx = r_type) >= R_386_standard | |
371 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
372 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 373 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
cbe950e9 L |
374 | >= R_386_irelative - R_386_ext) |
375 | && ((indx = r_type - R_386_vt_offset) - R_386_irelative | |
376 | >= R_386_vt - R_386_irelative)) | |
252b5132 | 377 | { |
d003868e AM |
378 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
379 | abfd, (int) r_type); | |
55fd94b0 | 380 | indx = R_386_NONE; |
252b5132 | 381 | } |
06614111 NC |
382 | /* PR 17512: file: 0f67f69d. */ |
383 | if (elf_howto_table [indx].type != r_type) | |
384 | return NULL; | |
142411ca L |
385 | return &elf_howto_table[indx]; |
386 | } | |
387 | ||
388 | static void | |
389 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
390 | arelent *cache_ptr, | |
391 | Elf_Internal_Rela *dst) | |
392 | { | |
393 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
394 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
395 | } |
396 | ||
397 | /* Return whether a symbol name implies a local label. The UnixWare | |
398 | 2.1 cc generates temporary symbols that start with .X, so we | |
399 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
400 | If so, we should move the .X recognition into | |
401 | _bfd_elf_is_local_label_name. */ | |
402 | ||
b34976b6 | 403 | static bfd_boolean |
55fd94b0 | 404 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
405 | { |
406 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 407 | return TRUE; |
252b5132 RH |
408 | |
409 | return _bfd_elf_is_local_label_name (abfd, name); | |
410 | } | |
411 | \f | |
38701953 | 412 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 413 | |
b34976b6 | 414 | static bfd_boolean |
55fd94b0 | 415 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
416 | { |
417 | int offset; | |
eea6121a | 418 | size_t size; |
38701953 | 419 | |
61adc1a4 | 420 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 421 | { |
61adc1a4 NC |
422 | int pr_version = bfd_get_32 (abfd, note->descdata); |
423 | ||
424 | if (pr_version != 1) | |
425 | return FALSE; | |
426 | ||
427 | /* pr_cursig */ | |
228e534f | 428 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
429 | |
430 | /* pr_pid */ | |
228e534f | 431 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
432 | |
433 | /* pr_reg */ | |
434 | offset = 28; | |
eea6121a | 435 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
436 | } |
437 | else | |
438 | { | |
439 | switch (note->descsz) | |
440 | { | |
441 | default: | |
442 | return FALSE; | |
38701953 | 443 | |
61adc1a4 NC |
444 | case 144: /* Linux/i386 */ |
445 | /* pr_cursig */ | |
228e534f | 446 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 447 | |
61adc1a4 | 448 | /* pr_pid */ |
228e534f | 449 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 450 | |
61adc1a4 NC |
451 | /* pr_reg */ |
452 | offset = 72; | |
eea6121a | 453 | size = 68; |
38701953 | 454 | |
61adc1a4 NC |
455 | break; |
456 | } | |
38701953 AM |
457 | } |
458 | ||
459 | /* Make a ".reg/999" section. */ | |
460 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 461 | size, note->descpos + offset); |
38701953 AM |
462 | } |
463 | ||
b34976b6 | 464 | static bfd_boolean |
55fd94b0 | 465 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 466 | { |
61adc1a4 | 467 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 468 | { |
61adc1a4 NC |
469 | int pr_version = bfd_get_32 (abfd, note->descdata); |
470 | ||
471 | if (pr_version != 1) | |
b34976b6 | 472 | return FALSE; |
38701953 | 473 | |
228e534f | 474 | elf_tdata (abfd)->core->program |
61adc1a4 | 475 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 476 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
477 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
478 | } | |
479 | else | |
480 | { | |
481 | switch (note->descsz) | |
482 | { | |
483 | default: | |
484 | return FALSE; | |
485 | ||
486 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 487 | elf_tdata (abfd)->core->pid |
261b8d08 | 488 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 489 | elf_tdata (abfd)->core->program |
61adc1a4 | 490 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 491 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
492 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
493 | } | |
38701953 AM |
494 | } |
495 | ||
496 | /* Note that for some reason, a spurious space is tacked | |
497 | onto the end of the args in some (at least one anyway) | |
498 | implementations, so strip it off if it exists. */ | |
38701953 | 499 | { |
228e534f | 500 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
501 | int n = strlen (command); |
502 | ||
503 | if (0 < n && command[n - 1] == ' ') | |
504 | command[n - 1] = '\0'; | |
505 | } | |
506 | ||
b34976b6 | 507 | return TRUE; |
38701953 AM |
508 | } |
509 | \f | |
510 | /* Functions for the i386 ELF linker. | |
511 | ||
512 | In order to gain some understanding of code in this file without | |
513 | knowing all the intricate details of the linker, note the | |
514 | following: | |
515 | ||
516 | Functions named elf_i386_* are called by external routines, other | |
517 | functions are only called locally. elf_i386_* functions appear | |
518 | in this file more or less in the order in which they are called | |
519 | from external routines. eg. elf_i386_check_relocs is called | |
520 | early in the link process, elf_i386_finish_dynamic_sections is | |
521 | one of the last functions. */ | |
522 | ||
252b5132 RH |
523 | |
524 | /* The name of the dynamic interpreter. This is put in the .interp | |
525 | section. */ | |
526 | ||
527 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
528 | ||
a23b6845 AM |
529 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
530 | copying dynamic variables from a shared lib into an app's dynbss | |
531 | section, and instead use a dynamic relocation to point into the | |
532 | shared lib. */ | |
533 | #define ELIMINATE_COPY_RELOCS 1 | |
534 | ||
252b5132 RH |
535 | /* The size in bytes of an entry in the procedure linkage table. */ |
536 | ||
537 | #define PLT_ENTRY_SIZE 16 | |
538 | ||
539 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
540 | this. See the SVR4 ABI i386 supplement to see how this works. |
541 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 542 | |
eac338cf | 543 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
544 | { |
545 | 0xff, 0x35, /* pushl contents of address */ | |
546 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
547 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 548 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
549 | }; |
550 | ||
551 | /* Subsequent entries in an absolute procedure linkage table look like | |
552 | this. */ | |
553 | ||
554 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
555 | { | |
556 | 0xff, 0x25, /* jmp indirect */ | |
557 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
558 | 0x68, /* pushl immediate */ | |
559 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
560 | 0xe9, /* jmp relative */ | |
561 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
562 | }; | |
563 | ||
eac338cf PB |
564 | /* The first entry in a PIC procedure linkage table look like this. |
565 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 566 | |
eac338cf | 567 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
568 | { |
569 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 570 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
571 | }; |
572 | ||
573 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
574 | ||
575 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
576 | { | |
577 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
578 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
579 | 0x68, /* pushl immediate */ | |
580 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
581 | 0xe9, /* jmp relative */ | |
582 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
583 | }; | |
584 | ||
dd7e64d4 L |
585 | /* Entries in the GOT procedure linkage table look like this. */ |
586 | ||
587 | static const bfd_byte elf_i386_got_plt_entry[8] = | |
588 | { | |
589 | 0xff, 0x25, /* jmp indirect */ | |
590 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
591 | 0x66, 0x90 /* xchg %ax,%ax */ | |
592 | }; | |
593 | ||
594 | /* Entries in the PIC GOT procedure linkage table look like this. */ | |
595 | ||
596 | static const bfd_byte elf_i386_pic_got_plt_entry[8] = | |
597 | { | |
598 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
599 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
600 | 0x66, 0x90 /* xchg %ax,%ax */ | |
601 | }; | |
602 | ||
e41b3a13 JJ |
603 | /* .eh_frame covering the .plt section. */ |
604 | ||
605 | static const bfd_byte elf_i386_eh_frame_plt[] = | |
606 | { | |
607 | #define PLT_CIE_LENGTH 20 | |
608 | #define PLT_FDE_LENGTH 36 | |
609 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
610 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
611 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
612 | 0, 0, 0, 0, /* CIE ID */ | |
613 | 1, /* CIE version */ | |
614 | 'z', 'R', 0, /* Augmentation string */ | |
615 | 1, /* Code alignment factor */ | |
616 | 0x7c, /* Data alignment factor */ | |
617 | 8, /* Return address column */ | |
618 | 1, /* Augmentation size */ | |
619 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
620 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
621 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
622 | DW_CFA_nop, DW_CFA_nop, | |
623 | ||
624 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
625 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
626 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
627 | 0, 0, 0, 0, /* .plt size goes here */ | |
628 | 0, /* Augmentation size */ | |
629 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
630 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
631 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
632 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
633 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
634 | 11, /* Block length */ | |
635 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
636 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
637 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 638 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
639 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
640 | }; | |
641 | ||
25e762b9 RM |
642 | struct elf_i386_plt_layout |
643 | { | |
644 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
645 | const bfd_byte *plt0_entry; | |
646 | unsigned int plt0_entry_size; | |
647 | ||
648 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
649 | unsigned int plt0_got1_offset; | |
650 | unsigned int plt0_got2_offset; | |
651 | ||
652 | /* Later entries in an absolute procedure linkage table look like this. */ | |
653 | const bfd_byte *plt_entry; | |
654 | unsigned int plt_entry_size; | |
655 | ||
656 | /* Offsets into plt_entry that are to be replaced with... */ | |
657 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
658 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
659 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
660 | ||
661 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
662 | unsigned int plt_lazy_offset; | |
663 | ||
664 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
665 | const bfd_byte *pic_plt0_entry; | |
666 | ||
667 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
668 | const bfd_byte *pic_plt_entry; | |
669 | ||
670 | /* .eh_frame covering the .plt section. */ | |
671 | const bfd_byte *eh_frame_plt; | |
672 | unsigned int eh_frame_plt_size; | |
673 | }; | |
674 | ||
675 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
676 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
677 | ||
678 | /* These are the standard parameters. */ | |
679 | static const struct elf_i386_plt_layout elf_i386_plt = | |
680 | { | |
681 | elf_i386_plt0_entry, /* plt0_entry */ | |
682 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
683 | 2, /* plt0_got1_offset */ | |
684 | 8, /* plt0_got2_offset */ | |
685 | elf_i386_plt_entry, /* plt_entry */ | |
686 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
687 | 2, /* plt_got_offset */ | |
688 | 7, /* plt_reloc_offset */ | |
689 | 12, /* plt_plt_offset */ | |
690 | 6, /* plt_lazy_offset */ | |
691 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
692 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
693 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
694 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
695 | }; | |
696 | \f | |
697 | ||
eac338cf PB |
698 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
699 | for the PLTResolve stub and then for each PLT entry. */ | |
700 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
701 | #define PLTRESOLVE_RELOCS 2 | |
702 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
703 | ||
23209a78 RM |
704 | /* Architecture-specific backend data for i386. */ |
705 | ||
706 | struct elf_i386_backend_data | |
707 | { | |
25e762b9 RM |
708 | /* Parameters describing PLT generation. */ |
709 | const struct elf_i386_plt_layout *plt; | |
710 | ||
23209a78 RM |
711 | /* Value used to fill the unused bytes of the first PLT entry. */ |
712 | bfd_byte plt0_pad_byte; | |
713 | ||
714 | /* True if the target system is VxWorks. */ | |
715 | int is_vxworks; | |
716 | }; | |
717 | ||
718 | #define get_elf_i386_backend_data(abfd) \ | |
719 | ((const struct elf_i386_backend_data *) \ | |
720 | get_elf_backend_data (abfd)->arch_data) | |
721 | ||
722 | /* These are the standard parameters. */ | |
723 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
724 | { | |
25e762b9 | 725 | &elf_i386_plt, /* plt */ |
23209a78 RM |
726 | 0, /* plt0_pad_byte */ |
727 | 0, /* is_vxworks */ | |
728 | }; | |
729 | ||
730 | #define elf_backend_arch_data &elf_i386_arch_bed | |
731 | ||
252b5132 RH |
732 | /* i386 ELF linker hash entry. */ |
733 | ||
734 | struct elf_i386_link_hash_entry | |
735 | { | |
ebe50bae | 736 | struct elf_link_hash_entry elf; |
252b5132 | 737 | |
0c715baa | 738 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 739 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 740 | |
37e55690 JJ |
741 | #define GOT_UNKNOWN 0 |
742 | #define GOT_NORMAL 1 | |
743 | #define GOT_TLS_GD 2 | |
744 | #define GOT_TLS_IE 4 | |
745 | #define GOT_TLS_IE_POS 5 | |
746 | #define GOT_TLS_IE_NEG 6 | |
747 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
748 | #define GOT_TLS_GDESC 8 |
749 | #define GOT_TLS_GD_BOTH_P(type) \ | |
750 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
751 | #define GOT_TLS_GD_P(type) \ | |
752 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
753 | #define GOT_TLS_GDESC_P(type) \ | |
754 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
755 | #define GOT_TLS_GD_ANY_P(type) \ | |
756 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 757 | unsigned char tls_type; |
67a4f2b7 | 758 | |
d5597ebc L |
759 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
760 | unsigned int gotoff_ref : 1; | |
761 | ||
dd7e64d4 L |
762 | /* Information about the GOT PLT entry. Filled when there are both |
763 | GOT and PLT relocations against the same function. */ | |
764 | union gotplt_union plt_got; | |
765 | ||
67a4f2b7 AO |
766 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
767 | starting at the end of the jump table. */ | |
768 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
769 | }; |
770 | ||
771 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
772 | ||
773 | struct elf_i386_obj_tdata | |
774 | { | |
775 | struct elf_obj_tdata root; | |
776 | ||
777 | /* tls_type for each local got entry. */ | |
778 | char *local_got_tls_type; | |
67a4f2b7 AO |
779 | |
780 | /* GOTPLT entries for TLS descriptors. */ | |
781 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
782 | }; |
783 | ||
13ae64f3 JJ |
784 | #define elf_i386_tdata(abfd) \ |
785 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
786 | ||
787 | #define elf_i386_local_got_tls_type(abfd) \ | |
788 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
789 | ||
67a4f2b7 AO |
790 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
791 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
792 | ||
0ffa91dd NC |
793 | #define is_i386_elf(bfd) \ |
794 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
795 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 796 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 797 | |
b34976b6 | 798 | static bfd_boolean |
55fd94b0 | 799 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 800 | { |
0ffa91dd | 801 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 802 | I386_ELF_DATA); |
13ae64f3 | 803 | } |
cedb70c5 | 804 | |
252b5132 RH |
805 | /* i386 ELF linker hash table. */ |
806 | ||
807 | struct elf_i386_link_hash_table | |
808 | { | |
ebe50bae | 809 | struct elf_link_hash_table elf; |
252b5132 | 810 | |
6725bdbf | 811 | /* Short-cuts to get to dynamic linker sections. */ |
6725bdbf AM |
812 | asection *sdynbss; |
813 | asection *srelbss; | |
e41b3a13 | 814 | asection *plt_eh_frame; |
dd7e64d4 | 815 | asection *plt_got; |
9635fe29 | 816 | |
4dfe6ac6 NC |
817 | union |
818 | { | |
13ae64f3 JJ |
819 | bfd_signed_vma refcount; |
820 | bfd_vma offset; | |
821 | } tls_ldm_got; | |
822 | ||
67a4f2b7 AO |
823 | /* The amount of space used by the reserved portion of the sgotplt |
824 | section, plus whatever space is used by the jump slots. */ | |
825 | bfd_vma sgotplt_jump_table_size; | |
826 | ||
87d72d41 AM |
827 | /* Small local sym cache. */ |
828 | struct sym_cache sym_cache; | |
9f03412a AO |
829 | |
830 | /* _TLS_MODULE_BASE_ symbol. */ | |
831 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
832 | |
833 | /* Used by local STT_GNU_IFUNC symbols. */ | |
834 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
835 | void * loc_hash_memory; |
836 | ||
837 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
838 | asection *srelplt2; | |
839 | ||
4dfe6ac6 NC |
840 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
841 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
842 | |
843 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
844 | bfd_vma next_jump_slot_index; | |
845 | ||
846 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
847 | bfd_vma next_irelative_index; | |
6725bdbf | 848 | }; |
252b5132 RH |
849 | |
850 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
851 | ||
852 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
853 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
854 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 855 | |
67a4f2b7 | 856 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 857 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 858 | |
252b5132 RH |
859 | /* Create an entry in an i386 ELF linker hash table. */ |
860 | ||
861 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
862 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
863 | struct bfd_hash_table *table, | |
864 | const char *string) | |
252b5132 | 865 | { |
252b5132 RH |
866 | /* Allocate the structure if it has not already been allocated by a |
867 | subclass. */ | |
ebe50bae AM |
868 | if (entry == NULL) |
869 | { | |
a50b1753 NC |
870 | entry = (struct bfd_hash_entry *) |
871 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
872 | if (entry == NULL) |
873 | return entry; | |
874 | } | |
252b5132 RH |
875 | |
876 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
877 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
878 | if (entry != NULL) | |
252b5132 | 879 | { |
ebe50bae AM |
880 | struct elf_i386_link_hash_entry *eh; |
881 | ||
882 | eh = (struct elf_i386_link_hash_entry *) entry; | |
883 | eh->dyn_relocs = NULL; | |
13ae64f3 | 884 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 885 | eh->gotoff_ref = 0; |
dd7e64d4 | 886 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 887 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
888 | } |
889 | ||
ebe50bae | 890 | return entry; |
252b5132 RH |
891 | } |
892 | ||
c25bc9fc L |
893 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
894 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
895 | as global symbol. We reuse indx and dynstr_index for local symbol | |
896 | hash since they aren't used by global symbols in this backend. */ | |
897 | ||
898 | static hashval_t | |
899 | elf_i386_local_htab_hash (const void *ptr) | |
900 | { | |
901 | struct elf_link_hash_entry *h | |
902 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 903 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
904 | } |
905 | ||
906 | /* Compare local hash entries. */ | |
907 | ||
908 | static int | |
909 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
910 | { | |
911 | struct elf_link_hash_entry *h1 | |
912 | = (struct elf_link_hash_entry *) ptr1; | |
913 | struct elf_link_hash_entry *h2 | |
914 | = (struct elf_link_hash_entry *) ptr2; | |
915 | ||
916 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
917 | } | |
918 | ||
919 | /* Find and/or create a hash entry for local symbol. */ | |
920 | ||
921 | static struct elf_link_hash_entry * | |
922 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
923 | bfd *abfd, const Elf_Internal_Rela *rel, | |
924 | bfd_boolean create) | |
925 | { | |
926 | struct elf_i386_link_hash_entry e, *ret; | |
927 | asection *sec = abfd->sections; | |
d2149d72 L |
928 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
929 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
930 | void **slot; |
931 | ||
932 | e.elf.indx = sec->id; | |
933 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
934 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
935 | create ? INSERT : NO_INSERT); | |
936 | ||
937 | if (!slot) | |
938 | return NULL; | |
939 | ||
940 | if (*slot) | |
941 | { | |
942 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
943 | return &ret->elf; | |
944 | } | |
945 | ||
946 | ret = (struct elf_i386_link_hash_entry *) | |
947 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
948 | sizeof (struct elf_i386_link_hash_entry)); | |
949 | if (ret) | |
950 | { | |
951 | memset (ret, 0, sizeof (*ret)); | |
952 | ret->elf.indx = sec->id; | |
953 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
954 | ret->elf.dynindx = -1; | |
dd7e64d4 | 955 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
956 | *slot = ret; |
957 | } | |
958 | return &ret->elf; | |
959 | } | |
960 | ||
68faa637 AM |
961 | /* Destroy an i386 ELF linker hash table. */ |
962 | ||
963 | static void | |
d495ab0d | 964 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
965 | { |
966 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 967 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
968 | |
969 | if (htab->loc_hash_table) | |
970 | htab_delete (htab->loc_hash_table); | |
971 | if (htab->loc_hash_memory) | |
972 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 973 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
974 | } |
975 | ||
252b5132 RH |
976 | /* Create an i386 ELF linker hash table. */ |
977 | ||
978 | static struct bfd_link_hash_table * | |
55fd94b0 | 979 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
980 | { |
981 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 982 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 983 | |
7bf52ea2 | 984 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 985 | if (ret == NULL) |
252b5132 RH |
986 | return NULL; |
987 | ||
eb4ff4d6 L |
988 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
989 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
990 | sizeof (struct elf_i386_link_hash_entry), |
991 | I386_ELF_DATA)) | |
252b5132 | 992 | { |
e2d34d7d | 993 | free (ret); |
252b5132 RH |
994 | return NULL; |
995 | } | |
996 | ||
c25bc9fc L |
997 | ret->loc_hash_table = htab_try_create (1024, |
998 | elf_i386_local_htab_hash, | |
999 | elf_i386_local_htab_eq, | |
1000 | NULL); | |
1001 | ret->loc_hash_memory = objalloc_create (); | |
1002 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1003 | { | |
d495ab0d | 1004 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1005 | return NULL; |
1006 | } | |
d495ab0d | 1007 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1008 | |
ebe50bae | 1009 | return &ret->elf.root; |
252b5132 RH |
1010 | } |
1011 | ||
6725bdbf AM |
1012 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1013 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1014 | hash table. */ | |
1015 | ||
b34976b6 | 1016 | static bfd_boolean |
55fd94b0 | 1017 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1018 | { |
1019 | struct elf_i386_link_hash_table *htab; | |
1020 | ||
6725bdbf | 1021 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1022 | return FALSE; |
6725bdbf | 1023 | |
6de2ae4a | 1024 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1025 | if (htab == NULL) |
1026 | return FALSE; | |
1027 | ||
3d4d4302 | 1028 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
d5597ebc | 1029 | if (!htab->sdynbss) |
6725bdbf AM |
1030 | abort (); |
1031 | ||
d5597ebc L |
1032 | if (info->executable) |
1033 | { | |
1034 | /* Always allow copy relocs for building executables. */ | |
1035 | asection *s = bfd_get_linker_section (dynobj, ".rel.bss"); | |
1036 | if (s == NULL) | |
1037 | { | |
1038 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1039 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1040 | ".rel.bss", | |
1041 | (bed->dynamic_sec_flags | |
1042 | | SEC_READONLY)); | |
1043 | if (s == NULL | |
1044 | || ! bfd_set_section_alignment (dynobj, s, | |
1045 | bed->s->log_file_align)) | |
1046 | return FALSE; | |
1047 | } | |
1048 | htab->srelbss = s; | |
1049 | } | |
1050 | ||
23209a78 | 1051 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1052 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1053 | &htab->srelplt2)) | |
711de32c | 1054 | return FALSE; |
eac338cf | 1055 | |
e41b3a13 | 1056 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1057 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1058 | && htab->elf.splt != NULL) |
e41b3a13 | 1059 | { |
bbf96e4e L |
1060 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1061 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1062 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1063 | htab->plt_eh_frame |
bbf96e4e | 1064 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1065 | if (htab->plt_eh_frame == NULL |
1066 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1067 | return FALSE; | |
e41b3a13 JJ |
1068 | } |
1069 | ||
b34976b6 | 1070 | return TRUE; |
6725bdbf AM |
1071 | } |
1072 | ||
ebe50bae AM |
1073 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1074 | ||
51b64d56 | 1075 | static void |
fcfa13d2 | 1076 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1077 | struct elf_link_hash_entry *dir, |
1078 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1079 | { |
1080 | struct elf_i386_link_hash_entry *edir, *eind; | |
1081 | ||
1082 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1083 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1084 | ||
bbd7ec4a | 1085 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1086 | { |
bbd7ec4a AM |
1087 | if (edir->dyn_relocs != NULL) |
1088 | { | |
e03a8ed8 L |
1089 | struct elf_dyn_relocs **pp; |
1090 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1091 | |
fcfa13d2 | 1092 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1093 | list. Merge any entries against the same section. */ |
1094 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1095 | { | |
e03a8ed8 | 1096 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1097 | |
1098 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1099 | if (q->sec == p->sec) | |
1100 | { | |
1101 | q->pc_count += p->pc_count; | |
1102 | q->count += p->count; | |
1103 | *pp = p->next; | |
1104 | break; | |
1105 | } | |
1106 | if (q == NULL) | |
1107 | pp = &p->next; | |
1108 | } | |
1109 | *pp = edir->dyn_relocs; | |
1110 | } | |
1111 | ||
ebe50bae AM |
1112 | edir->dyn_relocs = eind->dyn_relocs; |
1113 | eind->dyn_relocs = NULL; | |
1114 | } | |
ebe50bae | 1115 | |
cd67d266 JJ |
1116 | if (ind->root.type == bfd_link_hash_indirect |
1117 | && dir->got.refcount <= 0) | |
1118 | { | |
1119 | edir->tls_type = eind->tls_type; | |
1120 | eind->tls_type = GOT_UNKNOWN; | |
1121 | } | |
81848ca0 | 1122 | |
d5597ebc L |
1123 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1124 | generate a R_386_COPY reloc. */ | |
1125 | edir->gotoff_ref |= eind->gotoff_ref; | |
1126 | ||
81848ca0 AM |
1127 | if (ELIMINATE_COPY_RELOCS |
1128 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1129 | && dir->dynamic_adjusted) |
1130 | { | |
1131 | /* If called to transfer flags for a weakdef during processing | |
1132 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1133 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1134 | dir->ref_dynamic |= ind->ref_dynamic; | |
1135 | dir->ref_regular |= ind->ref_regular; | |
1136 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1137 | dir->needs_plt |= ind->needs_plt; | |
1138 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1139 | } | |
81848ca0 | 1140 | else |
fcfa13d2 | 1141 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
ebe50bae AM |
1142 | } |
1143 | ||
142411ca L |
1144 | /* Return TRUE if the TLS access code sequence support transition |
1145 | from R_TYPE. */ | |
1146 | ||
1147 | static bfd_boolean | |
1148 | elf_i386_check_tls_transition (bfd *abfd, asection *sec, | |
1149 | bfd_byte *contents, | |
1150 | Elf_Internal_Shdr *symtab_hdr, | |
1151 | struct elf_link_hash_entry **sym_hashes, | |
1152 | unsigned int r_type, | |
1153 | const Elf_Internal_Rela *rel, | |
1154 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1155 | { |
142411ca L |
1156 | unsigned int val, type; |
1157 | unsigned long r_symndx; | |
1158 | struct elf_link_hash_entry *h; | |
1159 | bfd_vma offset; | |
1160 | ||
1161 | /* Get the section contents. */ | |
1162 | if (contents == NULL) | |
1163 | { | |
1164 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1165 | contents = elf_section_data (sec)->this_hdr.contents; | |
1166 | else | |
1167 | { | |
1168 | /* FIXME: How to better handle error condition? */ | |
1169 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1170 | return FALSE; | |
13ae64f3 | 1171 | |
142411ca L |
1172 | /* Cache the section contents for elf_link_input_bfd. */ |
1173 | elf_section_data (sec)->this_hdr.contents = contents; | |
1174 | } | |
1175 | } | |
1176 | ||
1177 | offset = rel->r_offset; | |
13ae64f3 | 1178 | switch (r_type) |
142411ca L |
1179 | { |
1180 | case R_386_TLS_GD: | |
1181 | case R_386_TLS_LDM: | |
1182 | if (offset < 2 || (rel + 1) >= relend) | |
1183 | return FALSE; | |
1184 | ||
1185 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1186 | if (r_type == R_386_TLS_GD) | |
1187 | { | |
09e8c3bf | 1188 | /* Check transition from GD access model. Only |
142411ca L |
1189 | leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr |
1190 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop | |
1191 | can transit to different access model. */ | |
1192 | if ((offset + 10) > sec->size || | |
1193 | (type != 0x8d && type != 0x04)) | |
1194 | return FALSE; | |
1195 | ||
1196 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1197 | if (type == 0x04) | |
1198 | { | |
1199 | /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */ | |
1200 | if (offset < 3) | |
1201 | return FALSE; | |
1202 | ||
1203 | if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d) | |
1204 | return FALSE; | |
1205 | ||
1206 | if ((val & 0xc7) != 0x05 || val == (4 << 3)) | |
1207 | return FALSE; | |
1208 | } | |
1209 | else | |
1210 | { | |
1211 | /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */ | |
1212 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1213 | return FALSE; | |
1214 | ||
1215 | if (bfd_get_8 (abfd, contents + offset + 9) != 0x90) | |
1216 | return FALSE; | |
1217 | } | |
1218 | } | |
1219 | else | |
1220 | { | |
1221 | /* Check transition from LD access model. Only | |
1222 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr | |
1223 | can transit to different access model. */ | |
1224 | if (type != 0x8d || (offset + 9) > sec->size) | |
1225 | return FALSE; | |
1226 | ||
1227 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1228 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1229 | return FALSE; | |
1230 | } | |
1231 | ||
1232 | if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8) | |
1233 | return FALSE; | |
1234 | ||
1235 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1236 | if (r_symndx < symtab_hdr->sh_info) | |
1237 | return FALSE; | |
1238 | ||
1239 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
1240 | /* Use strncmp to check ___tls_get_addr since ___tls_get_addr |
1241 | may be versioned. */ | |
142411ca L |
1242 | return (h != NULL |
1243 | && h->root.root.string != NULL | |
1244 | && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1245 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32) | |
c4fb387b L |
1246 | && (strncmp (h->root.root.string, "___tls_get_addr", |
1247 | 15) == 0)); | |
142411ca L |
1248 | |
1249 | case R_386_TLS_IE: | |
1250 | /* Check transition from IE access model: | |
1251 | movl foo@indntpoff(%rip), %eax | |
1252 | movl foo@indntpoff(%rip), %reg | |
1253 | addl foo@indntpoff(%rip), %reg | |
1254 | */ | |
1255 | ||
1256 | if (offset < 1 || (offset + 4) > sec->size) | |
1257 | return FALSE; | |
1258 | ||
1259 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1260 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1261 | if (val == 0xa1) | |
1262 | return TRUE; | |
1263 | ||
1264 | if (offset < 2) | |
1265 | return FALSE; | |
1266 | ||
1267 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1268 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1269 | return ((type == 0x8b || type == 0x03) | |
1270 | && (val & 0xc7) == 0x05); | |
1271 | ||
1272 | case R_386_TLS_GOTIE: | |
1273 | case R_386_TLS_IE_32: | |
1274 | /* Check transition from {IE_32,GOTIE} access model: | |
1275 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1276 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1277 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1278 | */ | |
1279 | ||
1280 | if (offset < 2 || (offset + 4) > sec->size) | |
1281 | return FALSE; | |
1282 | ||
1283 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1284 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1285 | return FALSE; | |
1286 | ||
1287 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1288 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1289 | ||
1290 | case R_386_TLS_GOTDESC: | |
1291 | /* Check transition from GDesc access model: | |
1292 | leal x@tlsdesc(%ebx), %eax | |
1293 | ||
1294 | Make sure it's a leal adding ebx to a 32-bit offset | |
1295 | into any register, although it's probably almost always | |
1296 | going to be eax. */ | |
1297 | ||
1298 | if (offset < 2 || (offset + 4) > sec->size) | |
1299 | return FALSE; | |
1300 | ||
1301 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1302 | return FALSE; | |
1303 | ||
1304 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1305 | return (val & 0xc7) == 0x83; | |
1306 | ||
1307 | case R_386_TLS_DESC_CALL: | |
1308 | /* Check transition from GDesc access model: | |
1309 | call *x@tlsdesc(%rax) | |
1310 | */ | |
1311 | if (offset + 2 <= sec->size) | |
1312 | { | |
1313 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1314 | static const unsigned char call[] = { 0xff, 0x10 }; |
1315 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1316 | } |
1317 | ||
1318 | return FALSE; | |
1319 | ||
1320 | default: | |
1321 | abort (); | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /* Return TRUE if the TLS access transition is OK or no transition | |
1326 | will be performed. Update R_TYPE if there is a transition. */ | |
1327 | ||
1328 | static bfd_boolean | |
1329 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1330 | asection *sec, bfd_byte *contents, | |
1331 | Elf_Internal_Shdr *symtab_hdr, | |
1332 | struct elf_link_hash_entry **sym_hashes, | |
1333 | unsigned int *r_type, int tls_type, | |
1334 | const Elf_Internal_Rela *rel, | |
1335 | const Elf_Internal_Rela *relend, | |
4c544807 L |
1336 | struct elf_link_hash_entry *h, |
1337 | unsigned long r_symndx) | |
142411ca L |
1338 | { |
1339 | unsigned int from_type = *r_type; | |
1340 | unsigned int to_type = from_type; | |
1341 | bfd_boolean check = TRUE; | |
1342 | ||
bb1cb422 L |
1343 | /* Skip TLS transition for functions. */ |
1344 | if (h != NULL | |
1345 | && (h->type == STT_FUNC | |
1346 | || h->type == STT_GNU_IFUNC)) | |
1347 | return TRUE; | |
1348 | ||
142411ca | 1349 | switch (from_type) |
13ae64f3 JJ |
1350 | { |
1351 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1352 | case R_386_TLS_GOTDESC: |
1353 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1354 | case R_386_TLS_IE_32: |
37e55690 JJ |
1355 | case R_386_TLS_IE: |
1356 | case R_386_TLS_GOTIE: | |
1d85728f | 1357 | if (info->executable) |
142411ca L |
1358 | { |
1359 | if (h == NULL) | |
1360 | to_type = R_386_TLS_LE_32; | |
1361 | else if (from_type != R_386_TLS_IE | |
1362 | && from_type != R_386_TLS_GOTIE) | |
1363 | to_type = R_386_TLS_IE_32; | |
1364 | } | |
1365 | ||
1366 | /* When we are called from elf_i386_relocate_section, CONTENTS | |
1367 | isn't NULL and there may be additional transitions based on | |
1368 | TLS_TYPE. */ | |
1369 | if (contents != NULL) | |
1370 | { | |
1371 | unsigned int new_to_type = to_type; | |
1372 | ||
1d85728f | 1373 | if (info->executable |
142411ca L |
1374 | && h != NULL |
1375 | && h->dynindx == -1 | |
1376 | && (tls_type & GOT_TLS_IE)) | |
1377 | new_to_type = R_386_TLS_LE_32; | |
1378 | ||
1379 | if (to_type == R_386_TLS_GD | |
1380 | || to_type == R_386_TLS_GOTDESC | |
1381 | || to_type == R_386_TLS_DESC_CALL) | |
1382 | { | |
1383 | if (tls_type == GOT_TLS_IE_POS) | |
1384 | new_to_type = R_386_TLS_GOTIE; | |
1385 | else if (tls_type & GOT_TLS_IE) | |
1386 | new_to_type = R_386_TLS_IE_32; | |
1387 | } | |
1388 | ||
1389 | /* We checked the transition before when we were called from | |
1390 | elf_i386_check_relocs. We only want to check the new | |
1391 | transition which hasn't been checked before. */ | |
1392 | check = new_to_type != to_type && from_type == to_type; | |
1393 | to_type = new_to_type; | |
1394 | } | |
1395 | ||
1396 | break; | |
1397 | ||
13ae64f3 | 1398 | case R_386_TLS_LDM: |
1d85728f | 1399 | if (info->executable) |
142411ca L |
1400 | to_type = R_386_TLS_LE_32; |
1401 | break; | |
1402 | ||
1403 | default: | |
1404 | return TRUE; | |
1405 | } | |
1406 | ||
1407 | /* Return TRUE if there is no transition. */ | |
1408 | if (from_type == to_type) | |
1409 | return TRUE; | |
1410 | ||
1411 | /* Check if the transition can be performed. */ | |
1412 | if (check | |
1413 | && ! elf_i386_check_tls_transition (abfd, sec, contents, | |
1414 | symtab_hdr, sym_hashes, | |
1415 | from_type, rel, relend)) | |
1416 | { | |
2f629d23 | 1417 | reloc_howto_type *from, *to; |
4c544807 | 1418 | const char *name; |
142411ca L |
1419 | |
1420 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1421 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1422 | ||
4c544807 L |
1423 | if (h) |
1424 | name = h->root.root.string; | |
1425 | else | |
1426 | { | |
4c544807 | 1427 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1428 | |
4c544807 | 1429 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1430 | if (htab == NULL) |
1431 | name = "*unknown*"; | |
1432 | else | |
1433 | { | |
1434 | Elf_Internal_Sym *isym; | |
1435 | ||
1436 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1437 | abfd, r_symndx); | |
1438 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1439 | } | |
4c544807 L |
1440 | } |
1441 | ||
142411ca L |
1442 | (*_bfd_error_handler) |
1443 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1444 | "in section `%A' failed"), | |
4c544807 | 1445 | abfd, sec, from->name, to->name, name, |
142411ca L |
1446 | (unsigned long) rel->r_offset); |
1447 | bfd_set_error (bfd_error_bad_value); | |
1448 | return FALSE; | |
13ae64f3 JJ |
1449 | } |
1450 | ||
142411ca L |
1451 | *r_type = to_type; |
1452 | return TRUE; | |
13ae64f3 JJ |
1453 | } |
1454 | ||
c1d11331 L |
1455 | /* Rename some of the generic section flags to better document how they |
1456 | are used here. */ | |
1457 | #define need_convert_mov_to_lea sec_flg0 | |
1458 | ||
252b5132 | 1459 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1460 | calculate needed space in the global offset table, procedure linkage |
1461 | table, and dynamic reloc sections. */ | |
252b5132 | 1462 | |
b34976b6 | 1463 | static bfd_boolean |
55fd94b0 AM |
1464 | elf_i386_check_relocs (bfd *abfd, |
1465 | struct bfd_link_info *info, | |
1466 | asection *sec, | |
1467 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1468 | { |
6725bdbf | 1469 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1470 | Elf_Internal_Shdr *symtab_hdr; |
1471 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1472 | const Elf_Internal_Rela *rel; |
1473 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1474 | asection *sreloc; |
dd7e64d4 | 1475 | bfd_boolean use_plt_got; |
252b5132 | 1476 | |
1049f94e | 1477 | if (info->relocatable) |
b34976b6 | 1478 | return TRUE; |
252b5132 | 1479 | |
0ffa91dd NC |
1480 | BFD_ASSERT (is_i386_elf (abfd)); |
1481 | ||
6725bdbf | 1482 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1483 | if (htab == NULL) |
1484 | return FALSE; | |
1485 | ||
dd7e64d4 L |
1486 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1487 | && (get_elf_i386_backend_data (abfd) | |
1488 | == &elf_i386_arch_bed)); | |
1489 | ||
0ffa91dd | 1490 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1491 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1492 | |
252b5132 RH |
1493 | sreloc = NULL; |
1494 | ||
1495 | rel_end = relocs + sec->reloc_count; | |
1496 | for (rel = relocs; rel < rel_end; rel++) | |
1497 | { | |
13ae64f3 | 1498 | unsigned int r_type; |
252b5132 RH |
1499 | unsigned long r_symndx; |
1500 | struct elf_link_hash_entry *h; | |
d5597ebc | 1501 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1502 | Elf_Internal_Sym *isym; |
1503 | const char *name; | |
06a6a421 | 1504 | bfd_boolean size_reloc; |
252b5132 RH |
1505 | |
1506 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1507 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1508 | |
d9bc7a44 | 1509 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1510 | { |
d003868e AM |
1511 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1512 | abfd, | |
8f615d07 | 1513 | r_symndx); |
b34976b6 | 1514 | return FALSE; |
f5f31454 L |
1515 | } |
1516 | ||
252b5132 | 1517 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1518 | { |
1519 | /* A local symbol. */ | |
c2e61a4e L |
1520 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1521 | abfd, r_symndx); | |
1522 | if (isym == NULL) | |
1523 | return FALSE; | |
c25bc9fc L |
1524 | |
1525 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1526 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1527 | { | |
9fff0c39 | 1528 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1529 | if (h == NULL) |
c2e61a4e | 1530 | return FALSE; |
6bbec505 | 1531 | |
c25bc9fc L |
1532 | /* Fake a STT_GNU_IFUNC symbol. */ |
1533 | h->type = STT_GNU_IFUNC; | |
1534 | h->def_regular = 1; | |
1535 | h->ref_regular = 1; | |
1536 | h->forced_local = 1; | |
1537 | h->root.type = bfd_link_hash_defined; | |
1538 | } | |
1539 | else | |
1540 | h = NULL; | |
1541 | } | |
252b5132 | 1542 | else |
71cb9464 | 1543 | { |
4c544807 | 1544 | isym = NULL; |
71cb9464 L |
1545 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1546 | while (h->root.type == bfd_link_hash_indirect | |
1547 | || h->root.type == bfd_link_hash_warning) | |
1548 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1549 | } |
cbe950e9 | 1550 | |
d5597ebc | 1551 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1552 | if (h != NULL) |
1553 | { | |
cbe950e9 L |
1554 | /* Create the ifunc sections for static executables. If we |
1555 | never see an indirect function symbol nor we are building | |
1556 | a static executable, those sections will be empty and | |
1557 | won't appear in output. */ | |
1558 | switch (r_type) | |
1559 | { | |
1560 | default: | |
1561 | break; | |
1562 | ||
d5597ebc L |
1563 | case R_386_GOTOFF: |
1564 | eh->gotoff_ref = 1; | |
cbe950e9 L |
1565 | case R_386_32: |
1566 | case R_386_PC32: | |
1567 | case R_386_PLT32: | |
1568 | case R_386_GOT32: | |
9d4057ee AM |
1569 | if (htab->elf.dynobj == NULL) |
1570 | htab->elf.dynobj = abfd; | |
1571 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1572 | return FALSE; |
cbe950e9 L |
1573 | break; |
1574 | } | |
1575 | ||
ad1e85de L |
1576 | /* It is referenced by a non-shared object. */ |
1577 | h->ref_regular = 1; | |
61315175 | 1578 | h->root.non_ir_ref = 1; |
71cb9464 | 1579 | } |
252b5132 | 1580 | |
142411ca L |
1581 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1582 | symtab_hdr, sym_hashes, | |
1583 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1584 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1585 | return FALSE; |
13ae64f3 JJ |
1586 | |
1587 | switch (r_type) | |
252b5132 | 1588 | { |
37e55690 JJ |
1589 | case R_386_TLS_LDM: |
1590 | htab->tls_ldm_got.refcount += 1; | |
1591 | goto create_got; | |
1592 | ||
1593 | case R_386_PLT32: | |
1594 | /* This symbol requires a procedure linkage table entry. We | |
1595 | actually build the entry in adjust_dynamic_symbol, | |
1596 | because this might be a case of linking PIC code which is | |
1597 | never referenced by a dynamic object, in which case we | |
1598 | don't need to generate a procedure linkage table entry | |
1599 | after all. */ | |
1600 | ||
1601 | /* If this is a local symbol, we resolve it directly without | |
1602 | creating a procedure linkage table entry. */ | |
1603 | if (h == NULL) | |
1604 | continue; | |
1605 | ||
f5385ebf | 1606 | h->needs_plt = 1; |
37e55690 JJ |
1607 | h->plt.refcount += 1; |
1608 | break; | |
1609 | ||
6a3e1bae | 1610 | case R_386_SIZE32: |
06a6a421 | 1611 | size_reloc = TRUE; |
6a3e1bae L |
1612 | goto do_size; |
1613 | ||
13ae64f3 | 1614 | case R_386_TLS_IE_32: |
37e55690 JJ |
1615 | case R_386_TLS_IE: |
1616 | case R_386_TLS_GOTIE: | |
1d85728f | 1617 | if (!info->executable) |
13ae64f3 | 1618 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1619 | /* Fall through */ |
1620 | ||
252b5132 | 1621 | case R_386_GOT32: |
13ae64f3 | 1622 | case R_386_TLS_GD: |
67a4f2b7 AO |
1623 | case R_386_TLS_GOTDESC: |
1624 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1625 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1626 | { |
1627 | int tls_type, old_tls_type; | |
1628 | ||
1629 | switch (r_type) | |
1630 | { | |
1631 | default: | |
1632 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1633 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1634 | case R_386_TLS_GOTDESC: |
1635 | case R_386_TLS_DESC_CALL: | |
1636 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1637 | case R_386_TLS_IE_32: |
1638 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1639 | tls_type = GOT_TLS_IE_NEG; | |
1640 | else | |
ebcfb3c0 JJ |
1641 | /* If this is a GD->IE transition, we may use either of |
1642 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1643 | tls_type = GOT_TLS_IE; |
1644 | break; | |
1645 | case R_386_TLS_IE: | |
1646 | case R_386_TLS_GOTIE: | |
1647 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1648 | } |
1649 | ||
1650 | if (h != NULL) | |
1651 | { | |
1652 | h->got.refcount += 1; | |
1653 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1654 | } | |
1655 | else | |
1656 | { | |
1657 | bfd_signed_vma *local_got_refcounts; | |
1658 | ||
1659 | /* This is a global offset table entry for a local symbol. */ | |
1660 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1661 | if (local_got_refcounts == NULL) | |
1662 | { | |
1663 | bfd_size_type size; | |
1664 | ||
1665 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1666 | size *= (sizeof (bfd_signed_vma) |
1667 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1668 | local_got_refcounts = (bfd_signed_vma *) |
1669 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1670 | if (local_got_refcounts == NULL) |
c2e61a4e | 1671 | return FALSE; |
13ae64f3 | 1672 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1673 | elf_i386_local_tlsdesc_gotent (abfd) |
1674 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1675 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1676 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1677 | } |
1678 | local_got_refcounts[r_symndx] += 1; | |
1679 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1680 | } | |
1681 | ||
37e55690 JJ |
1682 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1683 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1684 | /* If a TLS symbol is accessed using IE at least once, |
1685 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1686 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1687 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1688 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1689 | { |
67a4f2b7 | 1690 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1691 | tls_type = old_tls_type; |
67a4f2b7 AO |
1692 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1693 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1694 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1695 | else |
1696 | { | |
09a24cbf | 1697 | if (h) |
4c544807 L |
1698 | name = h->root.root.string; |
1699 | else | |
1700 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1701 | NULL); | |
13ae64f3 | 1702 | (*_bfd_error_handler) |
d003868e | 1703 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1704 | "thread local symbol"), |
4c544807 | 1705 | abfd, name); |
68c4a57e | 1706 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1707 | return FALSE; |
13ae64f3 JJ |
1708 | } |
1709 | } | |
1710 | ||
1711 | if (old_tls_type != tls_type) | |
1712 | { | |
1713 | if (h != NULL) | |
1714 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1715 | else | |
1716 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1717 | } | |
1718 | } | |
0ac8d2ca AM |
1719 | /* Fall through */ |
1720 | ||
1721 | case R_386_GOTOFF: | |
1722 | case R_386_GOTPC: | |
13ae64f3 | 1723 | create_got: |
6de2ae4a | 1724 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
1725 | { |
1726 | if (htab->elf.dynobj == NULL) | |
1727 | htab->elf.dynobj = abfd; | |
6de2ae4a | 1728 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c2e61a4e | 1729 | return FALSE; |
0ac8d2ca | 1730 | } |
37e55690 JJ |
1731 | if (r_type != R_386_TLS_IE) |
1732 | break; | |
1733 | /* Fall through */ | |
252b5132 | 1734 | |
37e55690 JJ |
1735 | case R_386_TLS_LE_32: |
1736 | case R_386_TLS_LE: | |
1d85728f | 1737 | if (info->executable) |
37e55690 | 1738 | break; |
bffbf940 | 1739 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1740 | /* Fall through */ |
252b5132 RH |
1741 | |
1742 | case R_386_32: | |
1743 | case R_386_PC32: | |
710ab287 | 1744 | if (h != NULL && info->executable) |
6725bdbf | 1745 | { |
12d0ee4a | 1746 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1747 | need a copy reloc. We can't check reliably at this |
1748 | stage whether the section is read-only, as input | |
1749 | sections have not yet been mapped to output sections. | |
1750 | Tentatively set the flag for now, and correct in | |
1751 | adjust_dynamic_symbol. */ | |
f5385ebf | 1752 | h->non_got_ref = 1; |
12d0ee4a AM |
1753 | |
1754 | /* We may need a .plt entry if the function this reloc | |
1755 | refers to is in a shared lib. */ | |
51b64d56 | 1756 | h->plt.refcount += 1; |
c6585bbb | 1757 | if (r_type != R_386_PC32) |
f5385ebf | 1758 | h->pointer_equality_needed = 1; |
6725bdbf | 1759 | } |
7843f00e | 1760 | |
06a6a421 | 1761 | size_reloc = FALSE; |
6a3e1bae | 1762 | do_size: |
252b5132 | 1763 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1764 | against a global symbol, or a non PC relative reloc |
1765 | against a local symbol, then we need to copy the reloc | |
1766 | into the shared library. However, if we are linking with | |
1767 | -Bsymbolic, we do not need to copy a reloc against a | |
1768 | global symbol which is defined in an object we are | |
1769 | including in the link (i.e., DEF_REGULAR is set). At | |
1770 | this point we have not seen all the input files, so it is | |
1771 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1772 | later (it is never cleared). In case of a weak definition, |
1773 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1774 | a shared library. We account for that possibility below by |
1f655a09 L |
1775 | storing information in the relocs_copied field of the hash |
1776 | table entry. A similar situation occurs when creating | |
1777 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1778 | symbol local. |
56882138 | 1779 | |
12d0ee4a AM |
1780 | If on the other hand, we are creating an executable, we |
1781 | may need to keep relocations for symbols satisfied by a | |
1782 | dynamic library if we manage to avoid copy relocs for the | |
1783 | symbol. */ | |
1784 | if ((info->shared | |
1785 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1786 | && (r_type != R_386_PC32 |
12d0ee4a | 1787 | || (h != NULL |
55255dae | 1788 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1789 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1790 | || !h->def_regular)))) |
a23b6845 AM |
1791 | || (ELIMINATE_COPY_RELOCS |
1792 | && !info->shared | |
12d0ee4a AM |
1793 | && (sec->flags & SEC_ALLOC) != 0 |
1794 | && h != NULL | |
12d0ee4a | 1795 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1796 | || !h->def_regular))) |
252b5132 | 1797 | { |
e03a8ed8 L |
1798 | struct elf_dyn_relocs *p; |
1799 | struct elf_dyn_relocs **head; | |
ec338859 | 1800 | |
12d0ee4a AM |
1801 | /* We must copy these reloc types into the output file. |
1802 | Create a reloc section in dynobj and make room for | |
1803 | this reloc. */ | |
252b5132 RH |
1804 | if (sreloc == NULL) |
1805 | { | |
0ac8d2ca AM |
1806 | if (htab->elf.dynobj == NULL) |
1807 | htab->elf.dynobj = abfd; | |
1808 | ||
83bac4b0 NC |
1809 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1810 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1811 | ||
252b5132 | 1812 | if (sreloc == NULL) |
c2e61a4e | 1813 | return FALSE; |
252b5132 RH |
1814 | } |
1815 | ||
0c715baa AM |
1816 | /* If this is a global symbol, we count the number of |
1817 | relocations we need for this symbol. */ | |
1818 | if (h != NULL) | |
252b5132 | 1819 | { |
d5597ebc | 1820 | head = &eh->dyn_relocs; |
0c715baa AM |
1821 | } |
1822 | else | |
1823 | { | |
ec338859 AM |
1824 | /* Track dynamic relocs needed for local syms too. |
1825 | We really need local syms available to do this | |
1826 | easily. Oh well. */ | |
87d72d41 | 1827 | void **vpp; |
ec338859 | 1828 | asection *s; |
87d72d41 AM |
1829 | |
1830 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1831 | abfd, r_symndx); | |
1832 | if (isym == NULL) | |
1833 | return FALSE; | |
1834 | ||
1835 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1836 | if (s == NULL) |
87d72d41 | 1837 | s = sec; |
ec338859 | 1838 | |
e81d3500 | 1839 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1840 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1841 | } |
1842 | ||
1843 | p = *head; | |
1844 | if (p == NULL || p->sec != sec) | |
1845 | { | |
1846 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1847 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1848 | amt); | |
ec338859 | 1849 | if (p == NULL) |
c2e61a4e | 1850 | return FALSE; |
ec338859 AM |
1851 | p->next = *head; |
1852 | *head = p; | |
1853 | p->sec = sec; | |
1854 | p->count = 0; | |
1855 | p->pc_count = 0; | |
252b5132 | 1856 | } |
ec338859 AM |
1857 | |
1858 | p->count += 1; | |
06a6a421 L |
1859 | /* Count size relocation as PC-relative relocation. */ |
1860 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1861 | p->pc_count += 1; |
252b5132 | 1862 | } |
252b5132 RH |
1863 | break; |
1864 | ||
1865 | /* This relocation describes the C++ object vtable hierarchy. | |
1866 | Reconstruct it for later use during GC. */ | |
1867 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1868 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1869 | return FALSE; |
252b5132 RH |
1870 | break; |
1871 | ||
1872 | /* This relocation describes which C++ vtable entries are actually | |
1873 | used. Record for later use during GC. */ | |
1874 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1875 | BFD_ASSERT (h != NULL); |
1876 | if (h != NULL | |
1877 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c2e61a4e | 1878 | return FALSE; |
252b5132 RH |
1879 | break; |
1880 | ||
1881 | default: | |
1882 | break; | |
1883 | } | |
dd7e64d4 L |
1884 | |
1885 | if (use_plt_got | |
1886 | && h != NULL | |
1887 | && h->plt.refcount > 0 | |
1888 | && h->got.refcount > 0 | |
1889 | && htab->plt_got == NULL) | |
1890 | { | |
1891 | /* Create the GOT procedure linkage table. */ | |
1892 | unsigned int plt_got_align; | |
1893 | const struct elf_backend_data *bed; | |
1894 | ||
1895 | bed = get_elf_backend_data (info->output_bfd); | |
1896 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
1897 | && (sizeof (elf_i386_got_plt_entry) | |
1898 | == sizeof (elf_i386_pic_got_plt_entry))); | |
1899 | plt_got_align = 3; | |
1900 | ||
1901 | if (htab->elf.dynobj == NULL) | |
1902 | htab->elf.dynobj = abfd; | |
1903 | htab->plt_got | |
1904 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1905 | ".plt.got", | |
1906 | (bed->dynamic_sec_flags | |
1907 | | SEC_ALLOC | |
1908 | | SEC_CODE | |
1909 | | SEC_LOAD | |
1910 | | SEC_READONLY)); | |
1911 | if (htab->plt_got == NULL | |
1912 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1913 | htab->plt_got, | |
1914 | plt_got_align)) | |
1915 | return FALSE; | |
1916 | } | |
c1d11331 L |
1917 | |
1918 | if (r_type == R_386_GOT32 | |
1919 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
1920 | sec->need_convert_mov_to_lea = 1; | |
252b5132 RH |
1921 | } |
1922 | ||
b34976b6 | 1923 | return TRUE; |
252b5132 RH |
1924 | } |
1925 | ||
1926 | /* Return the section that should be marked against GC for a given | |
1927 | relocation. */ | |
1928 | ||
1929 | static asection * | |
55fd94b0 | 1930 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1931 | struct bfd_link_info *info, |
55fd94b0 AM |
1932 | Elf_Internal_Rela *rel, |
1933 | struct elf_link_hash_entry *h, | |
1934 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1935 | { |
1936 | if (h != NULL) | |
07adf181 AM |
1937 | switch (ELF32_R_TYPE (rel->r_info)) |
1938 | { | |
1939 | case R_386_GNU_VTINHERIT: | |
1940 | case R_386_GNU_VTENTRY: | |
1941 | return NULL; | |
1942 | } | |
1943 | ||
1944 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1945 | } |
1946 | ||
1947 | /* Update the got entry reference counts for the section being removed. */ | |
1948 | ||
b34976b6 | 1949 | static bfd_boolean |
55fd94b0 AM |
1950 | elf_i386_gc_sweep_hook (bfd *abfd, |
1951 | struct bfd_link_info *info, | |
1952 | asection *sec, | |
1953 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1954 | { |
4dfe6ac6 | 1955 | struct elf_i386_link_hash_table *htab; |
dd5724d5 AM |
1956 | Elf_Internal_Shdr *symtab_hdr; |
1957 | struct elf_link_hash_entry **sym_hashes; | |
1958 | bfd_signed_vma *local_got_refcounts; | |
1959 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1960 | |
7dda2462 TG |
1961 | if (info->relocatable) |
1962 | return TRUE; | |
1963 | ||
4dfe6ac6 NC |
1964 | htab = elf_i386_hash_table (info); |
1965 | if (htab == NULL) | |
1966 | return FALSE; | |
1967 | ||
ec338859 | 1968 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1969 | |
0ffa91dd | 1970 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
1971 | sym_hashes = elf_sym_hashes (abfd); |
1972 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1973 | |
1974 | relend = relocs + sec->reloc_count; | |
1975 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1976 | { |
1977 | unsigned long r_symndx; | |
1978 | unsigned int r_type; | |
1979 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1980 | |
26e41594 AM |
1981 | r_symndx = ELF32_R_SYM (rel->r_info); |
1982 | if (r_symndx >= symtab_hdr->sh_info) | |
1983 | { | |
26e41594 | 1984 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1985 | while (h->root.type == bfd_link_hash_indirect |
1986 | || h->root.type == bfd_link_hash_warning) | |
1987 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1988 | } |
bb1cb422 L |
1989 | else |
1990 | { | |
1991 | /* A local symbol. */ | |
1992 | Elf_Internal_Sym *isym; | |
1993 | ||
1994 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1995 | abfd, r_symndx); | |
1996 | ||
1997 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1998 | if (isym != NULL | |
1999 | && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
2000 | { | |
2001 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE); | |
2002 | if (h == NULL) | |
2003 | abort (); | |
2004 | } | |
2005 | } | |
0c715baa | 2006 | |
3db2e7dd L |
2007 | if (h) |
2008 | { | |
2009 | struct elf_i386_link_hash_entry *eh; | |
2010 | struct elf_dyn_relocs **pp; | |
2011 | struct elf_dyn_relocs *p; | |
2012 | ||
2013 | eh = (struct elf_i386_link_hash_entry *) h; | |
2014 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
2015 | if (p->sec == sec) | |
2016 | { | |
2017 | /* Everything must go for SEC. */ | |
2018 | *pp = p->next; | |
2019 | break; | |
2020 | } | |
2021 | } | |
2022 | ||
26e41594 | 2023 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
2024 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
2025 | symtab_hdr, sym_hashes, | |
2026 | &r_type, GOT_UNKNOWN, | |
23209a78 | 2027 | rel, relend, h, r_symndx)) |
142411ca L |
2028 | return FALSE; |
2029 | ||
26e41594 AM |
2030 | switch (r_type) |
2031 | { | |
2032 | case R_386_TLS_LDM: | |
4dfe6ac6 NC |
2033 | if (htab->tls_ldm_got.refcount > 0) |
2034 | htab->tls_ldm_got.refcount -= 1; | |
26e41594 | 2035 | break; |
0c715baa | 2036 | |
26e41594 | 2037 | case R_386_TLS_GD: |
67a4f2b7 AO |
2038 | case R_386_TLS_GOTDESC: |
2039 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
2040 | case R_386_TLS_IE_32: |
2041 | case R_386_TLS_IE: | |
2042 | case R_386_TLS_GOTIE: | |
2043 | case R_386_GOT32: | |
2044 | if (h != NULL) | |
2045 | { | |
2046 | if (h->got.refcount > 0) | |
2047 | h->got.refcount -= 1; | |
bb1cb422 L |
2048 | if (h->type == STT_GNU_IFUNC) |
2049 | { | |
2050 | if (h->plt.refcount > 0) | |
2051 | h->plt.refcount -= 1; | |
2052 | } | |
26e41594 AM |
2053 | } |
2054 | else if (local_got_refcounts != NULL) | |
2055 | { | |
2056 | if (local_got_refcounts[r_symndx] > 0) | |
2057 | local_got_refcounts[r_symndx] -= 1; | |
2058 | } | |
2059 | break; | |
0c715baa | 2060 | |
26e41594 AM |
2061 | case R_386_32: |
2062 | case R_386_PC32: | |
1788fc08 | 2063 | case R_386_SIZE32: |
3db2e7dd L |
2064 | if (info->shared |
2065 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2066 | break; |
2067 | /* Fall through */ | |
6725bdbf | 2068 | |
26e41594 AM |
2069 | case R_386_PLT32: |
2070 | if (h != NULL) | |
2071 | { | |
2072 | if (h->plt.refcount > 0) | |
2073 | h->plt.refcount -= 1; | |
2074 | } | |
2075 | break; | |
dd5724d5 | 2076 | |
bb1cb422 L |
2077 | case R_386_GOTOFF: |
2078 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2079 | { | |
2080 | if (h->got.refcount > 0) | |
2081 | h->got.refcount -= 1; | |
2082 | if (h->plt.refcount > 0) | |
2083 | h->plt.refcount -= 1; | |
2084 | } | |
2085 | break; | |
2086 | ||
26e41594 AM |
2087 | default: |
2088 | break; | |
2089 | } | |
2090 | } | |
252b5132 | 2091 | |
b34976b6 | 2092 | return TRUE; |
252b5132 RH |
2093 | } |
2094 | ||
2095 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2096 | regular object. The current definition is in some section of the | |
2097 | dynamic object, but we're not including those sections. We have to | |
2098 | change the definition to something the rest of the link can | |
2099 | understand. */ | |
2100 | ||
b34976b6 | 2101 | static bfd_boolean |
55fd94b0 AM |
2102 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2103 | struct elf_link_hash_entry *h) | |
252b5132 | 2104 | { |
6725bdbf | 2105 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2106 | asection *s; |
5ca5bb35 L |
2107 | struct elf_i386_link_hash_entry *eh; |
2108 | struct elf_dyn_relocs *p; | |
252b5132 | 2109 | |
cbe950e9 L |
2110 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2111 | if (h->type == STT_GNU_IFUNC) | |
2112 | { | |
73bcf233 L |
2113 | /* All local STT_GNU_IFUNC references must be treate as local |
2114 | calls via local PLT. */ | |
5ca5bb35 L |
2115 | if (h->ref_regular |
2116 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2117 | { | |
73bcf233 | 2118 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2119 | struct elf_dyn_relocs **pp; |
2120 | ||
2121 | eh = (struct elf_i386_link_hash_entry *) h; | |
2122 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2123 | { | |
2124 | pc_count += p->pc_count; | |
2125 | p->count -= p->pc_count; | |
2126 | p->pc_count = 0; | |
73bcf233 | 2127 | count += p->count; |
5ca5bb35 L |
2128 | if (p->count == 0) |
2129 | *pp = p->next; | |
2130 | else | |
2131 | pp = &p->next; | |
2132 | } | |
2133 | ||
73bcf233 | 2134 | if (pc_count || count) |
5ca5bb35 L |
2135 | { |
2136 | h->needs_plt = 1; | |
5ca5bb35 | 2137 | h->non_got_ref = 1; |
a5479e5f L |
2138 | if (h->plt.refcount <= 0) |
2139 | h->plt.refcount = 1; | |
2140 | else | |
2141 | h->plt.refcount += 1; | |
5ca5bb35 L |
2142 | } |
2143 | } | |
2144 | ||
cbe950e9 L |
2145 | if (h->plt.refcount <= 0) |
2146 | { | |
2147 | h->plt.offset = (bfd_vma) -1; | |
2148 | h->needs_plt = 0; | |
2149 | } | |
2150 | return TRUE; | |
2151 | } | |
2152 | ||
252b5132 RH |
2153 | /* If this is a function, put it in the procedure linkage table. We |
2154 | will fill in the contents of the procedure linkage table later, | |
2155 | when we know the address of the .got section. */ | |
2156 | if (h->type == STT_FUNC | |
f5385ebf | 2157 | || h->needs_plt) |
252b5132 | 2158 | { |
6725bdbf | 2159 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2160 | || SYMBOL_CALLS_LOCAL (info, h) |
2161 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2162 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2163 | { |
2164 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2165 | file, but the symbol was never referred to by a dynamic |
2166 | object, or if all references were garbage collected. In | |
2167 | such a case, we don't actually need to build a procedure | |
2168 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2169 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2170 | h->needs_plt = 0; |
252b5132 RH |
2171 | } |
2172 | ||
b34976b6 | 2173 | return TRUE; |
252b5132 | 2174 | } |
6725bdbf AM |
2175 | else |
2176 | /* It's possible that we incorrectly decided a .plt reloc was | |
2177 | needed for an R_386_PC32 reloc to a non-function sym in | |
2178 | check_relocs. We can't decide accurately between function and | |
2179 | non-function syms in check-relocs; Objects loaded later in | |
2180 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2181 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2182 | |
2183 | /* If this is a weak symbol, and there is a real definition, the | |
2184 | processor independent code will have arranged for us to see the | |
2185 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2186 | if (h->u.weakdef != NULL) |
252b5132 | 2187 | { |
f6e332e6 AM |
2188 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2189 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2190 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2191 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2192 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2193 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2194 | return TRUE; |
252b5132 RH |
2195 | } |
2196 | ||
2197 | /* This is a reference to a symbol defined by a dynamic object which | |
2198 | is not a function. */ | |
2199 | ||
2200 | /* If we are creating a shared library, we must presume that the | |
2201 | only references to the symbol are via the global offset table. | |
2202 | For such cases we need not do anything here; the relocations will | |
2203 | be handled correctly by relocate_section. */ | |
d5597ebc | 2204 | if (!info->executable) |
b34976b6 | 2205 | return TRUE; |
252b5132 | 2206 | |
7843f00e | 2207 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2208 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2209 | reloc. */ | |
2210 | eh = (struct elf_i386_link_hash_entry *) h; | |
2211 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2212 | return TRUE; |
7843f00e | 2213 | |
8bd621d8 AM |
2214 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2215 | if (info->nocopyreloc) | |
2216 | { | |
f5385ebf | 2217 | h->non_got_ref = 0; |
b34976b6 | 2218 | return TRUE; |
8bd621d8 AM |
2219 | } |
2220 | ||
643796e3 | 2221 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2222 | if (htab == NULL) |
2223 | return FALSE; | |
643796e3 | 2224 | |
d5597ebc L |
2225 | /* If there aren't any dynamic relocs in read-only sections nor |
2226 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2227 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2228 | not have dynamic relocations (other than copy and jump slot | |
2229 | relocations) in an executable. */ | |
23209a78 | 2230 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2231 | && !eh->gotoff_ref |
23209a78 | 2232 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
ebe50bae | 2233 | { |
a23b6845 AM |
2234 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2235 | { | |
2236 | s = p->sec->output_section; | |
2237 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2238 | break; | |
2239 | } | |
2240 | ||
a23b6845 AM |
2241 | if (p == NULL) |
2242 | { | |
f5385ebf | 2243 | h->non_got_ref = 0; |
a23b6845 AM |
2244 | return TRUE; |
2245 | } | |
ebe50bae AM |
2246 | } |
2247 | ||
252b5132 RH |
2248 | /* We must allocate the symbol in our .dynbss section, which will |
2249 | become part of the .bss section of the executable. There will be | |
2250 | an entry for this symbol in the .dynsym section. The dynamic | |
2251 | object will contain position independent code, so all references | |
2252 | from the dynamic object to this symbol will go through the global | |
2253 | offset table. The dynamic linker will use the .dynsym entry to | |
2254 | determine the address it must put in the global offset table, so | |
2255 | both the dynamic object and the regular object will refer to the | |
2256 | same memory location for the variable. */ | |
2257 | ||
252b5132 RH |
2258 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2259 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2260 | runtime process image. */ |
1d7e9d18 | 2261 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2262 | { |
eea6121a | 2263 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2264 | h->needs_copy = 1; |
252b5132 RH |
2265 | } |
2266 | ||
0ac8d2ca | 2267 | s = htab->sdynbss; |
252b5132 | 2268 | |
6cabe1ea | 2269 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2270 | } |
2271 | ||
6725bdbf | 2272 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2273 | dynamic relocs. */ |
6725bdbf | 2274 | |
b34976b6 | 2275 | static bfd_boolean |
eb4ff4d6 | 2276 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2277 | { |
2278 | struct bfd_link_info *info; | |
2279 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2280 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2281 | struct elf_dyn_relocs *p; |
25e762b9 | 2282 | unsigned plt_entry_size; |
6725bdbf | 2283 | |
e92d460e | 2284 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2285 | return TRUE; |
6725bdbf | 2286 | |
cbe950e9 | 2287 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2288 | |
6725bdbf AM |
2289 | info = (struct bfd_link_info *) inf; |
2290 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2291 | if (htab == NULL) |
2292 | return FALSE; | |
6725bdbf | 2293 | |
25e762b9 RM |
2294 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2295 | ||
dd7e64d4 L |
2296 | /* We can't use the GOT PLT if pointer equality is needed since |
2297 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2298 | linker won't update the GOT slot. We will get into an infinite | |
2299 | loop at run-time. */ | |
2300 | if (htab->plt_got != NULL | |
2301 | && h->type != STT_GNU_IFUNC | |
2302 | && !h->pointer_equality_needed | |
2303 | && h->plt.refcount > 0 | |
2304 | && h->got.refcount > 0) | |
2305 | { | |
2306 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2307 | reloctions. */ | |
2308 | h->plt.offset = (bfd_vma) -1; | |
2309 | ||
2310 | /* Use the GOT PLT. */ | |
2311 | eh->plt_got.refcount = 1; | |
2312 | } | |
2313 | ||
cbe950e9 L |
2314 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2315 | here if it is defined and referenced in a non-shared object. */ | |
2316 | if (h->type == STT_GNU_IFUNC | |
2317 | && h->def_regular) | |
25e762b9 | 2318 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
7b70956d WN |
2319 | plt_entry_size, |
2320 | plt_entry_size, 4); | |
cbe950e9 | 2321 | else if (htab->elf.dynamic_sections_created |
dd7e64d4 | 2322 | && (h->plt.refcount > 0 || eh->plt_got.refcount > 0)) |
6725bdbf | 2323 | { |
dd7e64d4 L |
2324 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
2325 | ||
5a15f56f AM |
2326 | /* Make sure this symbol is output as a dynamic symbol. |
2327 | Undefined weak syms won't yet be marked as dynamic. */ | |
2328 | if (h->dynindx == -1 | |
f5385ebf | 2329 | && !h->forced_local) |
5a15f56f | 2330 | { |
c152c796 | 2331 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2332 | return FALSE; |
5a15f56f AM |
2333 | } |
2334 | ||
4e795f50 AM |
2335 | if (info->shared |
2336 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 2337 | { |
6de2ae4a | 2338 | asection *s = htab->elf.splt; |
dd7e64d4 | 2339 | asection *got_s = htab->plt_got; |
6725bdbf | 2340 | |
ced53ee5 AM |
2341 | /* If this is the first .plt entry, make room for the special |
2342 | first entry. */ | |
eea6121a | 2343 | if (s->size == 0) |
bb81b736 | 2344 | s->size = plt_entry_size; |
6725bdbf | 2345 | |
dd7e64d4 L |
2346 | if (use_plt_got) |
2347 | eh->plt_got.offset = got_s->size; | |
2348 | else | |
2349 | h->plt.offset = s->size; | |
6725bdbf | 2350 | |
ced53ee5 AM |
2351 | /* If this symbol is not defined in a regular file, and we are |
2352 | not generating a shared library, then set the symbol to this | |
2353 | location in the .plt. This is required to make function | |
2354 | pointers compare as equal between the normal executable and | |
2355 | the shared library. */ | |
2356 | if (! info->shared | |
f5385ebf | 2357 | && !h->def_regular) |
ced53ee5 | 2358 | { |
dd7e64d4 L |
2359 | if (use_plt_got) |
2360 | { | |
2361 | /* We need to make a call to the entry of the GOT PLT | |
2362 | instead of regular PLT entry. */ | |
2363 | h->root.u.def.section = got_s; | |
2364 | h->root.u.def.value = eh->plt_got.offset; | |
2365 | } | |
2366 | else | |
2367 | { | |
2368 | h->root.u.def.section = s; | |
2369 | h->root.u.def.value = h->plt.offset; | |
2370 | } | |
ced53ee5 | 2371 | } |
6725bdbf | 2372 | |
ced53ee5 | 2373 | /* Make room for this entry. */ |
dd7e64d4 L |
2374 | if (use_plt_got) |
2375 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2376 | else | |
2377 | { | |
2378 | s->size += plt_entry_size; | |
6725bdbf | 2379 | |
dd7e64d4 L |
2380 | /* We also need to make an entry in the .got.plt section, |
2381 | which will be placed in the .got section by the linker | |
2382 | script. */ | |
2383 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2384 | |
dd7e64d4 L |
2385 | /* We also need to make an entry in the .rel.plt section. */ |
2386 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2387 | htab->elf.srelplt->reloc_count++; | |
2388 | } | |
eac338cf | 2389 | |
23209a78 RM |
2390 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
2391 | && !info->shared) | |
eac338cf PB |
2392 | { |
2393 | /* VxWorks has a second set of relocations for each PLT entry | |
2394 | in executables. They go in a separate relocation section, | |
2395 | which is processed by the kernel loader. */ | |
2396 | ||
2397 | /* There are two relocations for the initial PLT entry: an | |
2398 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2399 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2400 | ||
25e762b9 | 2401 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2402 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2403 | ||
2404 | /* There are two extra relocations for each subsequent PLT entry: | |
2405 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2406 | relocation for the PLT entry. */ | |
2407 | ||
2408 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2409 | } | |
6725bdbf | 2410 | } |
ced53ee5 AM |
2411 | else |
2412 | { | |
51b64d56 | 2413 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2414 | h->needs_plt = 0; |
ced53ee5 | 2415 | } |
6725bdbf AM |
2416 | } |
2417 | else | |
2418 | { | |
51b64d56 | 2419 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2420 | h->needs_plt = 0; |
6725bdbf AM |
2421 | } |
2422 | ||
67a4f2b7 AO |
2423 | eh->tlsdesc_got = (bfd_vma) -1; |
2424 | ||
37e55690 | 2425 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2426 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2427 | if (h->got.refcount > 0 | |
1d85728f | 2428 | && info->executable |
13ae64f3 | 2429 | && h->dynindx == -1 |
37e55690 | 2430 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2431 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2432 | else if (h->got.refcount > 0) |
6725bdbf | 2433 | { |
0ac8d2ca | 2434 | asection *s; |
b34976b6 | 2435 | bfd_boolean dyn; |
13ae64f3 | 2436 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2437 | |
5a15f56f AM |
2438 | /* Make sure this symbol is output as a dynamic symbol. |
2439 | Undefined weak syms won't yet be marked as dynamic. */ | |
2440 | if (h->dynindx == -1 | |
f5385ebf | 2441 | && !h->forced_local) |
5a15f56f | 2442 | { |
c152c796 | 2443 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2444 | return FALSE; |
5a15f56f AM |
2445 | } |
2446 | ||
6de2ae4a | 2447 | s = htab->elf.sgot; |
67a4f2b7 AO |
2448 | if (GOT_TLS_GDESC_P (tls_type)) |
2449 | { | |
6de2ae4a | 2450 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2451 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2452 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2453 | h->got.offset = (bfd_vma) -2; |
2454 | } | |
2455 | if (! GOT_TLS_GDESC_P (tls_type) | |
2456 | || GOT_TLS_GD_P (tls_type)) | |
2457 | { | |
2458 | h->got.offset = s->size; | |
2459 | s->size += 4; | |
2460 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2461 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2462 | s->size += 4; | |
2463 | } | |
ebe50bae | 2464 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2465 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2466 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2467 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2468 | need two), R_386_TLS_GD needs one if local symbol and two if | |
2469 | global. */ | |
2470 | if (tls_type == GOT_TLS_IE_BOTH) | |
6de2ae4a | 2471 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2472 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2473 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2474 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2475 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2476 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2477 | else if (! GOT_TLS_GDESC_P (tls_type) |
2478 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2479 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
2480 | && (info->shared |
2481 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 2482 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2483 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2484 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2485 | } |
2486 | else | |
51b64d56 | 2487 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2488 | |
5a15f56f | 2489 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2490 | return TRUE; |
5a15f56f | 2491 | |
0c715baa AM |
2492 | /* In the shared -Bsymbolic case, discard space allocated for |
2493 | dynamic pc-relative relocs against symbols which turn out to be | |
2494 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2495 | space for pc-relative relocs that have become local due to symbol |
2496 | visibility changes. */ | |
0c715baa AM |
2497 | |
2498 | if (info->shared) | |
5a15f56f | 2499 | { |
09695f56 AM |
2500 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2501 | appear on a call or on something like ".long foo - .". We | |
2502 | want calls to protected symbols to resolve directly to the | |
2503 | function rather than going via the plt. If people want | |
2504 | function pointer comparisons to work as expected then they | |
2505 | should avoid writing assembly like ".long foo - .". */ | |
2506 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2507 | { |
e03a8ed8 | 2508 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2509 | |
2510 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2511 | { | |
c3ce498c L |
2512 | p->count -= p->pc_count; |
2513 | p->pc_count = 0; | |
0c715baa AM |
2514 | if (p->count == 0) |
2515 | *pp = p->next; | |
2516 | else | |
2517 | pp = &p->next; | |
2518 | } | |
5a15f56f | 2519 | } |
4e795f50 | 2520 | |
23209a78 | 2521 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2522 | { |
e03a8ed8 | 2523 | struct elf_dyn_relocs **pp; |
3348747a NS |
2524 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2525 | { | |
2526 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2527 | *pp = p->next; | |
2528 | else | |
2529 | pp = &p->next; | |
2530 | } | |
2531 | } | |
2532 | ||
4e795f50 | 2533 | /* Also discard relocs on undefined weak syms with non-default |
c353e543 | 2534 | visibility. */ |
22d606e9 | 2535 | if (eh->dyn_relocs != NULL |
c353e543 | 2536 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2537 | { |
2538 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2539 | eh->dyn_relocs = NULL; | |
2540 | ||
2541 | /* Make sure undefined weak symbols are output as a dynamic | |
2542 | symbol in PIEs. */ | |
2543 | else if (h->dynindx == -1 | |
2544 | && !h->forced_local) | |
2545 | { | |
2546 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2547 | return FALSE; | |
2548 | } | |
2549 | } | |
0c715baa | 2550 | } |
a23b6845 | 2551 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2552 | { |
2553 | /* For the non-shared case, discard space for relocs against | |
2554 | symbols which turn out to need copy relocs or are not | |
2555 | dynamic. */ | |
2556 | ||
f5385ebf AM |
2557 | if (!h->non_got_ref |
2558 | && ((h->def_dynamic | |
2559 | && !h->def_regular) | |
ebe50bae | 2560 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2561 | && (h->root.type == bfd_link_hash_undefweak |
2562 | || h->root.type == bfd_link_hash_undefined)))) | |
2563 | { | |
2564 | /* Make sure this symbol is output as a dynamic symbol. | |
2565 | Undefined weak syms won't yet be marked as dynamic. */ | |
2566 | if (h->dynindx == -1 | |
f5385ebf | 2567 | && !h->forced_local) |
0c715baa | 2568 | { |
c152c796 | 2569 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2570 | return FALSE; |
0c715baa | 2571 | } |
5a15f56f | 2572 | |
0c715baa AM |
2573 | /* If that succeeded, we know we'll be keeping all the |
2574 | relocs. */ | |
2575 | if (h->dynindx != -1) | |
2576 | goto keep; | |
2577 | } | |
2578 | ||
2579 | eh->dyn_relocs = NULL; | |
2580 | ||
ec338859 | 2581 | keep: ; |
5a15f56f AM |
2582 | } |
2583 | ||
0c715baa AM |
2584 | /* Finally, allocate space. */ |
2585 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2586 | { |
e7c33416 NC |
2587 | asection *sreloc; |
2588 | ||
cbe950e9 | 2589 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2590 | |
2591 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2592 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2593 | } |
2594 | ||
b34976b6 | 2595 | return TRUE; |
6725bdbf AM |
2596 | } |
2597 | ||
c25bc9fc L |
2598 | /* Allocate space in .plt, .got and associated reloc sections for |
2599 | local dynamic relocs. */ | |
2600 | ||
2601 | static bfd_boolean | |
2602 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2603 | { | |
2604 | struct elf_link_hash_entry *h | |
2605 | = (struct elf_link_hash_entry *) *slot; | |
2606 | ||
2607 | if (h->type != STT_GNU_IFUNC | |
2608 | || !h->def_regular | |
2609 | || !h->ref_regular | |
2610 | || !h->forced_local | |
2611 | || h->root.type != bfd_link_hash_defined) | |
2612 | abort (); | |
2613 | ||
2614 | return elf_i386_allocate_dynrelocs (h, inf); | |
2615 | } | |
2616 | ||
0c715baa AM |
2617 | /* Find any dynamic relocs that apply to read-only sections. */ |
2618 | ||
b34976b6 | 2619 | static bfd_boolean |
eb4ff4d6 | 2620 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2621 | { |
2622 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 2623 | struct elf_dyn_relocs *p; |
0c715baa | 2624 | |
aa715242 L |
2625 | /* Skip local IFUNC symbols. */ |
2626 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2627 | return TRUE; | |
2628 | ||
0c715baa AM |
2629 | eh = (struct elf_i386_link_hash_entry *) h; |
2630 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2631 | { | |
2632 | asection *s = p->sec->output_section; | |
2633 | ||
2634 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2635 | { | |
2636 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2637 | ||
2638 | info->flags |= DF_TEXTREL; | |
2639 | ||
1952c5cd L |
2640 | if ((info->warn_shared_textrel && info->shared) |
2641 | || info->error_textrel) | |
2642 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
2643 | p->sec->owner, h->root.root.string, |
2644 | p->sec); | |
2645 | ||
0c715baa | 2646 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2647 | return FALSE; |
0c715baa AM |
2648 | } |
2649 | } | |
b34976b6 | 2650 | return TRUE; |
0c715baa AM |
2651 | } |
2652 | ||
daa67607 L |
2653 | /* Convert |
2654 | mov foo@GOT(%reg), %reg | |
2655 | to | |
2656 | lea foo@GOTOFF(%reg), %reg | |
2657 | with the local symbol, foo. */ | |
2658 | ||
2659 | static bfd_boolean | |
2660 | elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2661 | struct bfd_link_info *link_info) | |
2662 | { | |
2663 | Elf_Internal_Shdr *symtab_hdr; | |
2664 | Elf_Internal_Rela *internal_relocs; | |
2665 | Elf_Internal_Rela *irel, *irelend; | |
2666 | bfd_byte *contents; | |
2667 | struct elf_i386_link_hash_table *htab; | |
2668 | bfd_boolean changed_contents; | |
2669 | bfd_boolean changed_relocs; | |
2670 | bfd_signed_vma *local_got_refcounts; | |
2671 | ||
2672 | /* Don't even try to convert non-ELF outputs. */ | |
2673 | if (!is_elf_hash_table (link_info->hash)) | |
2674 | return FALSE; | |
2675 | ||
c1d11331 | 2676 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 2677 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
c1d11331 | 2678 | || sec->need_convert_mov_to_lea == 0 |
c8831961 | 2679 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2680 | return TRUE; |
2681 | ||
2682 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2683 | ||
2684 | /* Load the relocations for this section. */ | |
2685 | internal_relocs = (_bfd_elf_link_read_relocs | |
2686 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2687 | link_info->keep_memory)); | |
2688 | if (internal_relocs == NULL) | |
2689 | return FALSE; | |
2690 | ||
2691 | htab = elf_i386_hash_table (link_info); | |
2692 | changed_contents = FALSE; | |
2693 | changed_relocs = FALSE; | |
2694 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2695 | ||
2696 | /* Get the section contents. */ | |
2697 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2698 | contents = elf_section_data (sec)->this_hdr.contents; | |
2699 | else | |
2700 | { | |
2701 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2702 | goto error_return; | |
2703 | } | |
2704 | ||
2705 | irelend = internal_relocs + sec->reloc_count; | |
2706 | for (irel = internal_relocs; irel < irelend; irel++) | |
2707 | { | |
2708 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2709 | unsigned int r_symndx = ELF32_R_SYM (irel->r_info); | |
2710 | unsigned int indx; | |
2711 | struct elf_link_hash_entry *h; | |
2712 | ||
2713 | if (r_type != R_386_GOT32) | |
2714 | continue; | |
2715 | ||
2716 | /* Get the symbol referred to by the reloc. */ | |
2717 | if (r_symndx < symtab_hdr->sh_info) | |
2718 | { | |
2719 | Elf_Internal_Sym *isym; | |
2720 | ||
2721 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2722 | abfd, r_symndx); | |
2723 | ||
2724 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */ | |
2725 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
5697705a | 2726 | && irel->r_offset >= 2 |
daa67607 L |
2727 | && bfd_get_8 (input_bfd, |
2728 | contents + irel->r_offset - 2) == 0x8b) | |
2729 | { | |
2730 | bfd_put_8 (output_bfd, 0x8d, | |
2731 | contents + irel->r_offset - 2); | |
2732 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2733 | if (local_got_refcounts != NULL | |
2734 | && local_got_refcounts[r_symndx] > 0) | |
2735 | local_got_refcounts[r_symndx] -= 1; | |
2736 | changed_contents = TRUE; | |
2737 | changed_relocs = TRUE; | |
2738 | } | |
2739 | continue; | |
2740 | } | |
2741 | ||
2742 | indx = r_symndx - symtab_hdr->sh_info; | |
2743 | h = elf_sym_hashes (abfd)[indx]; | |
2744 | BFD_ASSERT (h != NULL); | |
2745 | ||
2746 | while (h->root.type == bfd_link_hash_indirect | |
2747 | || h->root.type == bfd_link_hash_warning) | |
2748 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2749 | ||
3f65f599 L |
2750 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid |
2751 | optimizing _DYNAMIC since ld.so may use its link-time address. */ | |
daa67607 L |
2752 | if (h->def_regular |
2753 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2754 | && h != htab->elf.hdynamic |
daa67607 | 2755 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
5697705a | 2756 | && irel->r_offset >= 2 |
daa67607 L |
2757 | && bfd_get_8 (input_bfd, |
2758 | contents + irel->r_offset - 2) == 0x8b) | |
2759 | { | |
2760 | bfd_put_8 (output_bfd, 0x8d, | |
2761 | contents + irel->r_offset - 2); | |
2762 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2763 | if (h->got.refcount > 0) | |
2764 | h->got.refcount -= 1; | |
2765 | changed_contents = TRUE; | |
2766 | changed_relocs = TRUE; | |
2767 | } | |
2768 | } | |
2769 | ||
2770 | if (contents != NULL | |
2771 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2772 | { | |
2773 | if (!changed_contents && !link_info->keep_memory) | |
2774 | free (contents); | |
2775 | else | |
2776 | { | |
2777 | /* Cache the section contents for elf_link_input_bfd. */ | |
2778 | elf_section_data (sec)->this_hdr.contents = contents; | |
2779 | } | |
2780 | } | |
2781 | ||
2782 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2783 | { | |
2784 | if (!changed_relocs) | |
2785 | free (internal_relocs); | |
2786 | else | |
2787 | elf_section_data (sec)->relocs = internal_relocs; | |
2788 | } | |
2789 | ||
2790 | return TRUE; | |
2791 | ||
2792 | error_return: | |
2793 | if (contents != NULL | |
2794 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2795 | free (contents); | |
2796 | if (internal_relocs != NULL | |
2797 | && elf_section_data (sec)->relocs != internal_relocs) | |
2798 | free (internal_relocs); | |
2799 | return FALSE; | |
2800 | } | |
2801 | ||
252b5132 RH |
2802 | /* Set the sizes of the dynamic sections. */ |
2803 | ||
b34976b6 | 2804 | static bfd_boolean |
23209a78 | 2805 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 2806 | { |
6725bdbf | 2807 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2808 | bfd *dynobj; |
2809 | asection *s; | |
b34976b6 | 2810 | bfd_boolean relocs; |
0c715baa | 2811 | bfd *ibfd; |
252b5132 | 2812 | |
6725bdbf | 2813 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2814 | if (htab == NULL) |
2815 | return FALSE; | |
ebe50bae | 2816 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2817 | if (dynobj == NULL) |
2818 | abort (); | |
252b5132 | 2819 | |
ebe50bae | 2820 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2821 | { |
2822 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2823 | if (info->executable) |
252b5132 | 2824 | { |
3d4d4302 | 2825 | s = bfd_get_linker_section (dynobj, ".interp"); |
ffb2e45b AM |
2826 | if (s == NULL) |
2827 | abort (); | |
eea6121a | 2828 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
2829 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2830 | } | |
161d71a6 | 2831 | } |
6725bdbf | 2832 | |
0c715baa AM |
2833 | /* Set up .got offsets for local syms, and space for local dynamic |
2834 | relocs. */ | |
c72f2fb2 | 2835 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
2836 | { |
2837 | bfd_signed_vma *local_got; | |
2838 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2839 | char *local_tls_type; |
67a4f2b7 | 2840 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2841 | bfd_size_type locsymcount; |
2842 | Elf_Internal_Shdr *symtab_hdr; | |
2843 | asection *srel; | |
6725bdbf | 2844 | |
0ffa91dd | 2845 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2846 | continue; |
6725bdbf | 2847 | |
0c715baa AM |
2848 | for (s = ibfd->sections; s != NULL; s = s->next) |
2849 | { | |
e03a8ed8 | 2850 | struct elf_dyn_relocs *p; |
0c715baa | 2851 | |
daa67607 L |
2852 | if (!elf_i386_convert_mov_to_lea (ibfd, s, info)) |
2853 | return FALSE; | |
2854 | ||
e03a8ed8 | 2855 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 2856 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
2857 | p != NULL; |
2858 | p = p->next) | |
0c715baa | 2859 | { |
ec338859 AM |
2860 | if (!bfd_is_abs_section (p->sec) |
2861 | && bfd_is_abs_section (p->sec->output_section)) | |
2862 | { | |
2863 | /* Input section has been discarded, either because | |
2864 | it is a copy of a linkonce section or due to | |
2865 | linker script /DISCARD/, so we'll be discarding | |
2866 | the relocs too. */ | |
2867 | } | |
23209a78 | 2868 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
2869 | && strcmp (p->sec->output_section->name, |
2870 | ".tls_vars") == 0) | |
2871 | { | |
2872 | /* Relocations in vxworks .tls_vars sections are | |
2873 | handled specially by the loader. */ | |
2874 | } | |
248866a8 | 2875 | else if (p->count != 0) |
ec338859 AM |
2876 | { |
2877 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2878 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
2879 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2880 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2881 | { |
2882 | info->flags |= DF_TEXTREL; | |
1952c5cd L |
2883 | if ((info->warn_shared_textrel && info->shared) |
2884 | || info->error_textrel) | |
2885 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 2886 | p->sec->owner, p->sec); |
b70321a2 | 2887 | } |
ec338859 | 2888 | } |
0c715baa AM |
2889 | } |
2890 | } | |
2891 | ||
2892 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2893 | if (!local_got) |
2894 | continue; | |
6725bdbf | 2895 | |
0ffa91dd | 2896 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2897 | locsymcount = symtab_hdr->sh_info; |
2898 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 2899 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 2900 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2901 | s = htab->elf.sgot; |
2902 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2903 | for (; local_got < end_local_got; |
2904 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2905 | { |
67a4f2b7 | 2906 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2907 | if (*local_got > 0) |
6725bdbf | 2908 | { |
67a4f2b7 AO |
2909 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2910 | { | |
6de2ae4a | 2911 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2912 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2913 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2914 | *local_got = (bfd_vma) -2; |
2915 | } | |
2916 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2917 | || GOT_TLS_GD_P (*local_tls_type)) | |
2918 | { | |
2919 | *local_got = s->size; | |
2920 | s->size += 4; | |
2921 | if (GOT_TLS_GD_P (*local_tls_type) | |
2922 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2923 | s->size += 4; | |
2924 | } | |
13ae64f3 | 2925 | if (info->shared |
67a4f2b7 | 2926 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2927 | || (*local_tls_type & GOT_TLS_IE)) |
2928 | { | |
2929 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2930 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2931 | else if (GOT_TLS_GD_P (*local_tls_type) |
2932 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2933 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2934 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 2935 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 2936 | } |
6725bdbf | 2937 | } |
161d71a6 L |
2938 | else |
2939 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2940 | } |
252b5132 | 2941 | } |
6725bdbf | 2942 | |
13ae64f3 JJ |
2943 | if (htab->tls_ldm_got.refcount > 0) |
2944 | { | |
2945 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2946 | relocs. */ | |
6de2ae4a L |
2947 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
2948 | htab->elf.sgot->size += 8; | |
2949 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2950 | } |
2951 | else | |
2952 | htab->tls_ldm_got.offset = -1; | |
2953 | ||
0c715baa AM |
2954 | /* Allocate global sym .plt and .got entries, and space for global |
2955 | sym dynamic relocs. */ | |
eb4ff4d6 | 2956 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2957 | |
c25bc9fc L |
2958 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2959 | htab_traverse (htab->loc_hash_table, | |
2960 | elf_i386_allocate_local_dynrelocs, | |
2961 | info); | |
2962 | ||
67a4f2b7 AO |
2963 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2964 | incremented. However, when we reserve space for TLS descriptors, | |
2965 | it's not incremented, so in order to compute the space reserved | |
2966 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 2967 | slot size. |
caa0075c | 2968 | |
e1f98742 L |
2969 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
2970 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 2971 | if (htab->elf.srelplt) |
e1f98742 L |
2972 | { |
2973 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
2974 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
2975 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2976 | } | |
2977 | else if (htab->elf.irelplt) | |
2978 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2979 | ||
67a4f2b7 | 2980 | |
a7b16ceb L |
2981 | if (htab->elf.sgotplt) |
2982 | { | |
2983 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 2984 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2985 | if ((htab->elf.hgot == NULL |
2986 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2987 | && (htab->elf.sgotplt->size |
2988 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2989 | && (htab->elf.splt == NULL |
2990 | || htab->elf.splt->size == 0) | |
2991 | && (htab->elf.sgot == NULL | |
2992 | || htab->elf.sgot->size == 0) | |
2993 | && (htab->elf.iplt == NULL | |
2994 | || htab->elf.iplt->size == 0) | |
2995 | && (htab->elf.igotplt == NULL | |
2996 | || htab->elf.igotplt->size == 0)) | |
2997 | htab->elf.sgotplt->size = 0; | |
2998 | } | |
2999 | ||
9a2a56cc AM |
3000 | |
3001 | if (htab->plt_eh_frame != NULL | |
3002 | && htab->elf.splt != NULL | |
3003 | && htab->elf.splt->size != 0 | |
3004 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
3005 | && _bfd_elf_eh_frame_present (info)) | |
3006 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
3007 | ||
5a15f56f AM |
3008 | /* We now have determined the sizes of the various dynamic sections. |
3009 | Allocate memory for them. */ | |
b34976b6 | 3010 | relocs = FALSE; |
252b5132 RH |
3011 | for (s = dynobj->sections; s != NULL; s = s->next) |
3012 | { | |
eac338cf PB |
3013 | bfd_boolean strip_section = TRUE; |
3014 | ||
252b5132 RH |
3015 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3016 | continue; | |
3017 | ||
6de2ae4a | 3018 | if (s == htab->elf.splt |
9a2a56cc | 3019 | || s == htab->elf.sgot) |
252b5132 | 3020 | { |
6725bdbf AM |
3021 | /* Strip this section if we don't need it; see the |
3022 | comment below. */ | |
eac338cf PB |
3023 | /* We'd like to strip these sections if they aren't needed, but if |
3024 | we've exported dynamic symbols from them we must leave them. | |
3025 | It's too late to tell BFD to get rid of the symbols. */ | |
3026 | ||
7325306f | 3027 | if (htab->elf.hplt != NULL) |
eac338cf | 3028 | strip_section = FALSE; |
252b5132 | 3029 | } |
9a2a56cc AM |
3030 | else if (s == htab->elf.sgotplt |
3031 | || s == htab->elf.iplt | |
3032 | || s == htab->elf.igotplt | |
dd7e64d4 | 3033 | || s == htab->plt_got |
9a2a56cc AM |
3034 | || s == htab->plt_eh_frame |
3035 | || s == htab->sdynbss) | |
3036 | { | |
3037 | /* Strip these too. */ | |
3038 | } | |
0112cd26 | 3039 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3040 | { |
6de2ae4a L |
3041 | if (s->size != 0 |
3042 | && s != htab->elf.srelplt | |
3043 | && s != htab->srelplt2) | |
b34976b6 | 3044 | relocs = TRUE; |
252b5132 | 3045 | |
0ac8d2ca AM |
3046 | /* We use the reloc_count field as a counter if we need |
3047 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3048 | s->reloc_count = 0; |
252b5132 | 3049 | } |
6725bdbf | 3050 | else |
252b5132 RH |
3051 | { |
3052 | /* It's not one of our sections, so don't allocate space. */ | |
3053 | continue; | |
3054 | } | |
3055 | ||
c456f082 | 3056 | if (s->size == 0) |
252b5132 | 3057 | { |
0ac8d2ca AM |
3058 | /* If we don't need this section, strip it from the |
3059 | output file. This is mostly to handle .rel.bss and | |
3060 | .rel.plt. We must create both sections in | |
3061 | create_dynamic_sections, because they must be created | |
3062 | before the linker maps input sections to output | |
3063 | sections. The linker does that before | |
3064 | adjust_dynamic_symbol is called, and it is that | |
3065 | function which decides whether anything needs to go | |
3066 | into these sections. */ | |
c456f082 AM |
3067 | if (strip_section) |
3068 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3069 | continue; |
3070 | } | |
3071 | ||
c456f082 AM |
3072 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3073 | continue; | |
3074 | ||
f69da49f AM |
3075 | /* Allocate memory for the section contents. We use bfd_zalloc |
3076 | here in case unused entries are not reclaimed before the | |
3077 | section's contents are written out. This should not happen, | |
3078 | but this way if it does, we get a R_386_NONE reloc instead | |
3079 | of garbage. */ | |
a50b1753 | 3080 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3081 | if (s->contents == NULL) |
b34976b6 | 3082 | return FALSE; |
252b5132 RH |
3083 | } |
3084 | ||
e41b3a13 | 3085 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3086 | && htab->plt_eh_frame->contents != NULL) |
3087 | { | |
3088 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
3089 | sizeof (elf_i386_eh_frame_plt)); | |
3090 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3091 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3092 | } | |
e41b3a13 | 3093 | |
ebe50bae | 3094 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3095 | { |
3096 | /* Add some entries to the .dynamic section. We fill in the | |
3097 | values later, in elf_i386_finish_dynamic_sections, but we | |
3098 | must add the entries now so that we get the correct size for | |
3099 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3100 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3101 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3102 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3103 | |
36af4a4e | 3104 | if (info->executable) |
252b5132 | 3105 | { |
dc810e39 | 3106 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3107 | return FALSE; |
252b5132 RH |
3108 | } |
3109 | ||
6de2ae4a | 3110 | if (htab->elf.splt->size != 0) |
252b5132 | 3111 | { |
dc810e39 AM |
3112 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3113 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3114 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3115 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3116 | return FALSE; |
252b5132 RH |
3117 | } |
3118 | ||
3119 | if (relocs) | |
3120 | { | |
dc810e39 AM |
3121 | if (!add_dynamic_entry (DT_REL, 0) |
3122 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3123 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3124 | return FALSE; |
252b5132 | 3125 | |
0c715baa AM |
3126 | /* If any dynamic relocs apply to a read-only section, |
3127 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3128 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3129 | elf_link_hash_traverse (&htab->elf, |
3130 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3131 | |
3132 | if ((info->flags & DF_TEXTREL) != 0) | |
3133 | { | |
3134 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3135 | return FALSE; |
0c715baa | 3136 | } |
252b5132 | 3137 | } |
23209a78 | 3138 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3139 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3140 | return FALSE; | |
252b5132 | 3141 | } |
dc810e39 | 3142 | #undef add_dynamic_entry |
252b5132 | 3143 | |
b34976b6 | 3144 | return TRUE; |
252b5132 RH |
3145 | } |
3146 | ||
67a4f2b7 AO |
3147 | static bfd_boolean |
3148 | elf_i386_always_size_sections (bfd *output_bfd, | |
3149 | struct bfd_link_info *info) | |
3150 | { | |
3151 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3152 | ||
3153 | if (tls_sec) | |
3154 | { | |
3155 | struct elf_link_hash_entry *tlsbase; | |
3156 | ||
3157 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3158 | "_TLS_MODULE_BASE_", | |
3159 | FALSE, FALSE, FALSE); | |
3160 | ||
3161 | if (tlsbase && tlsbase->type == STT_TLS) | |
3162 | { | |
4dfe6ac6 | 3163 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3164 | struct bfd_link_hash_entry *bh = NULL; |
3165 | const struct elf_backend_data *bed | |
3166 | = get_elf_backend_data (output_bfd); | |
3167 | ||
4dfe6ac6 NC |
3168 | htab = elf_i386_hash_table (info); |
3169 | if (htab == NULL) | |
3170 | return FALSE; | |
3171 | ||
67a4f2b7 AO |
3172 | if (!(_bfd_generic_link_add_one_symbol |
3173 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3174 | tls_sec, 0, NULL, FALSE, | |
3175 | bed->collect, &bh))) | |
3176 | return FALSE; | |
9f03412a | 3177 | |
4dfe6ac6 | 3178 | htab->tls_module_base = bh; |
9f03412a | 3179 | |
67a4f2b7 AO |
3180 | tlsbase = (struct elf_link_hash_entry *)bh; |
3181 | tlsbase->def_regular = 1; | |
3182 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3183 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3184 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3185 | } | |
3186 | } | |
3187 | ||
3188 | return TRUE; | |
3189 | } | |
3190 | ||
38701953 AM |
3191 | /* Set the correct type for an x86 ELF section. We do this by the |
3192 | section name, which is a hack, but ought to work. */ | |
3193 | ||
b34976b6 | 3194 | static bfd_boolean |
55fd94b0 AM |
3195 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3196 | Elf_Internal_Shdr *hdr, | |
3197 | asection *sec) | |
38701953 | 3198 | { |
91d6fa6a | 3199 | const char *name; |
38701953 AM |
3200 | |
3201 | name = bfd_get_section_name (abfd, sec); | |
3202 | ||
3203 | /* This is an ugly, but unfortunately necessary hack that is | |
3204 | needed when producing EFI binaries on x86. It tells | |
3205 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3206 | containing ELF relocation info. We need this hack in order to | |
3207 | be able to generate ELF binaries that can be translated into | |
3208 | EFI applications (which are essentially COFF objects). Those | |
3209 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3210 | which would normally cause BFD to segfault because it would | |
3211 | attempt to interpret this section as containing relocation | |
3212 | entries for section "oc". With this hack enabled, ".reloc" | |
3213 | will be treated as a normal data section, which will avoid the | |
3214 | segfault. However, you won't be able to create an ELFNN binary | |
3215 | with a section named "oc" that needs relocations, but that's | |
3216 | the kind of ugly side-effects you get when detecting section | |
3217 | types based on their names... In practice, this limitation is | |
3218 | unlikely to bite. */ | |
3219 | if (strcmp (name, ".reloc") == 0) | |
3220 | hdr->sh_type = SHT_PROGBITS; | |
3221 | ||
b34976b6 | 3222 | return TRUE; |
38701953 AM |
3223 | } |
3224 | ||
9f03412a AO |
3225 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3226 | executables. Rather than setting it to the beginning of the TLS | |
3227 | section, we have to set it to the end. This function may be called | |
3228 | multiple times, it is idempotent. */ | |
3229 | ||
3230 | static void | |
eb4ff4d6 | 3231 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3232 | { |
4dfe6ac6 | 3233 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3234 | struct bfd_link_hash_entry *base; |
3235 | ||
3236 | if (!info->executable) | |
3237 | return; | |
3238 | ||
4dfe6ac6 NC |
3239 | htab = elf_i386_hash_table (info); |
3240 | if (htab == NULL) | |
3241 | return; | |
9f03412a | 3242 | |
4dfe6ac6 NC |
3243 | base = htab->tls_module_base; |
3244 | if (base == NULL) | |
9f03412a AO |
3245 | return; |
3246 | ||
4dfe6ac6 | 3247 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3248 | } |
3249 | ||
13ae64f3 JJ |
3250 | /* Return the base VMA address which should be subtracted from real addresses |
3251 | when resolving @dtpoff relocation. | |
3252 | This is PT_TLS segment p_vaddr. */ | |
3253 | ||
3254 | static bfd_vma | |
eb4ff4d6 | 3255 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3256 | { |
e1918d23 AM |
3257 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3258 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3259 | return 0; |
e1918d23 | 3260 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3261 | } |
3262 | ||
3263 | /* Return the relocation value for @tpoff relocation | |
3264 | if STT_TLS virtual address is ADDRESS. */ | |
3265 | ||
3266 | static bfd_vma | |
eb4ff4d6 | 3267 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3268 | { |
e1918d23 | 3269 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3270 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3271 | bfd_vma static_tls_size; | |
13ae64f3 | 3272 | |
e1918d23 AM |
3273 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3274 | if (htab->tls_sec == NULL) | |
6a30718d | 3275 | return 0; |
7dc98aea RO |
3276 | |
3277 | /* Consider special static TLS alignment requirements. */ | |
3278 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3279 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3280 | } |
3281 | ||
252b5132 RH |
3282 | /* Relocate an i386 ELF section. */ |
3283 | ||
b34976b6 | 3284 | static bfd_boolean |
55fd94b0 AM |
3285 | elf_i386_relocate_section (bfd *output_bfd, |
3286 | struct bfd_link_info *info, | |
3287 | bfd *input_bfd, | |
3288 | asection *input_section, | |
3289 | bfd_byte *contents, | |
3290 | Elf_Internal_Rela *relocs, | |
3291 | Elf_Internal_Sym *local_syms, | |
3292 | asection **local_sections) | |
252b5132 | 3293 | { |
6725bdbf | 3294 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3295 | Elf_Internal_Shdr *symtab_hdr; |
3296 | struct elf_link_hash_entry **sym_hashes; | |
3297 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3298 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
3299 | Elf_Internal_Rela *rel; |
3300 | Elf_Internal_Rela *relend; | |
3348747a | 3301 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3302 | unsigned plt_entry_size; |
252b5132 | 3303 | |
0ffa91dd | 3304 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3305 | |
6725bdbf | 3306 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3307 | if (htab == NULL) |
3308 | return FALSE; | |
0ffa91dd | 3309 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3310 | sym_hashes = elf_sym_hashes (input_bfd); |
3311 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3312 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3313 | /* We have to handle relocations in vxworks .tls_vars sections |
3314 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 RM |
3315 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3316 | && info->shared | |
3348747a NS |
3317 | && !strcmp (input_section->output_section->name, |
3318 | ".tls_vars")); | |
252b5132 | 3319 | |
eb4ff4d6 | 3320 | elf_i386_set_tls_module_base (info); |
9f03412a | 3321 | |
25e762b9 RM |
3322 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3323 | ||
252b5132 RH |
3324 | rel = relocs; |
3325 | relend = relocs + input_section->reloc_count; | |
3326 | for (; rel < relend; rel++) | |
3327 | { | |
13ae64f3 | 3328 | unsigned int r_type; |
252b5132 RH |
3329 | reloc_howto_type *howto; |
3330 | unsigned long r_symndx; | |
3331 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3332 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3333 | Elf_Internal_Sym *sym; |
3334 | asection *sec; | |
dd7e64d4 | 3335 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3336 | bfd_vma relocation; |
b34976b6 | 3337 | bfd_boolean unresolved_reloc; |
252b5132 | 3338 | bfd_reloc_status_type r; |
1b452ec6 | 3339 | unsigned int indx; |
13ae64f3 | 3340 | int tls_type; |
1788fc08 | 3341 | bfd_vma st_size; |
dd7e64d4 | 3342 | asection *resolved_plt; |
252b5132 RH |
3343 | |
3344 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3345 | if (r_type == R_386_GNU_VTINHERIT |
3346 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 3347 | continue; |
dc47f327 | 3348 | |
55fd94b0 | 3349 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3350 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3351 | >= R_386_ext - R_386_standard) | |
3352 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
cbe950e9 | 3353 | >= R_386_irelative - R_386_ext)) |
252b5132 | 3354 | { |
6ba842b6 | 3355 | (*_bfd_error_handler) |
d003868e AM |
3356 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3357 | input_bfd, input_section, r_type); | |
252b5132 | 3358 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3359 | return FALSE; |
252b5132 | 3360 | } |
1b452ec6 | 3361 | howto = elf_howto_table + indx; |
252b5132 RH |
3362 | |
3363 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3364 | h = NULL; |
3365 | sym = NULL; | |
3366 | sec = NULL; | |
b34976b6 | 3367 | unresolved_reloc = FALSE; |
252b5132 RH |
3368 | if (r_symndx < symtab_hdr->sh_info) |
3369 | { | |
3370 | sym = local_syms + r_symndx; | |
3371 | sec = local_sections[r_symndx]; | |
3372 | relocation = (sec->output_section->vma | |
3373 | + sec->output_offset | |
3374 | + sym->st_value); | |
1788fc08 | 3375 | st_size = sym->st_size; |
ab96bf03 AM |
3376 | |
3377 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3378 | && ((sec->flags & SEC_MERGE) != 0 | |
3379 | || (info->relocatable | |
3380 | && sec->output_offset != 0))) | |
f8df10f4 | 3381 | { |
f8df10f4 | 3382 | bfd_vma addend; |
4a335f3d | 3383 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3384 | |
4a335f3d | 3385 | switch (howto->size) |
f8df10f4 | 3386 | { |
4a335f3d AM |
3387 | case 0: |
3388 | addend = bfd_get_8 (input_bfd, where); | |
3389 | if (howto->pc_relative) | |
3390 | { | |
3391 | addend = (addend ^ 0x80) - 0x80; | |
3392 | addend += 1; | |
3393 | } | |
3394 | break; | |
3395 | case 1: | |
3396 | addend = bfd_get_16 (input_bfd, where); | |
3397 | if (howto->pc_relative) | |
3398 | { | |
3399 | addend = (addend ^ 0x8000) - 0x8000; | |
3400 | addend += 2; | |
3401 | } | |
3402 | break; | |
3403 | case 2: | |
3404 | addend = bfd_get_32 (input_bfd, where); | |
3405 | if (howto->pc_relative) | |
3406 | { | |
3407 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3408 | addend += 4; | |
3409 | } | |
3410 | break; | |
3411 | default: | |
3412 | abort (); | |
f8df10f4 JJ |
3413 | } |
3414 | ||
ab96bf03 AM |
3415 | if (info->relocatable) |
3416 | addend += sec->output_offset; | |
3417 | else | |
3418 | { | |
3419 | asection *msec = sec; | |
3420 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3421 | addend); | |
3422 | addend -= relocation; | |
3423 | addend += msec->output_section->vma + msec->output_offset; | |
3424 | } | |
4a335f3d AM |
3425 | |
3426 | switch (howto->size) | |
3427 | { | |
3428 | case 0: | |
16a10388 | 3429 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3430 | if (howto->pc_relative) |
3431 | addend -= 1; | |
3432 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3433 | break; |
3434 | case 1: | |
3435 | if (howto->pc_relative) | |
3436 | addend -= 2; | |
3437 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3438 | break; |
3439 | case 2: | |
3440 | if (howto->pc_relative) | |
3441 | addend -= 4; | |
3442 | bfd_put_32 (input_bfd, addend, where); | |
3443 | break; | |
3444 | } | |
f8df10f4 | 3445 | } |
1f85278f L |
3446 | else if (!info->relocatable |
3447 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
c25bc9fc L |
3448 | { |
3449 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3450 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3451 | FALSE); | |
c25bc9fc L |
3452 | if (h == NULL) |
3453 | abort (); | |
3454 | ||
23209a78 | 3455 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3456 | h->root.u.def.value = sym->st_value; |
3457 | h->root.u.def.section = sec; | |
3458 | } | |
252b5132 RH |
3459 | } |
3460 | else | |
3461 | { | |
3d540e93 | 3462 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3463 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3464 | |
b2a8e766 AM |
3465 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3466 | r_symndx, symtab_hdr, sym_hashes, | |
3467 | h, sec, relocation, | |
62d887d4 | 3468 | unresolved_reloc, warned, ignored); |
1788fc08 | 3469 | st_size = h->size; |
252b5132 RH |
3470 | } |
3471 | ||
dbaa2011 | 3472 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3473 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3474 | rel, 1, relend, howto, 0, contents); |
9635fe29 | 3475 | |
ab96bf03 AM |
3476 | if (info->relocatable) |
3477 | continue; | |
3478 | ||
cbe950e9 L |
3479 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3480 | it here if it is defined in a non-shared object. */ | |
3481 | if (h != NULL | |
3482 | && h->type == STT_GNU_IFUNC | |
3483 | && h->def_regular) | |
3484 | { | |
3485 | asection *plt, *gotplt, *base_got; | |
3486 | bfd_vma plt_index; | |
4c544807 | 3487 | const char *name; |
cbe950e9 L |
3488 | |
3489 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3490 | || h->plt.offset == (bfd_vma) -1) | |
3491 | abort (); | |
3492 | ||
3493 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3494 | if (htab->elf.splt != NULL) |
cbe950e9 | 3495 | { |
6de2ae4a L |
3496 | plt = htab->elf.splt; |
3497 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3498 | } |
3499 | else | |
3500 | { | |
6de2ae4a L |
3501 | plt = htab->elf.iplt; |
3502 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3503 | } |
3504 | ||
3505 | relocation = (plt->output_section->vma | |
3506 | + plt->output_offset + h->plt.offset); | |
3507 | ||
3508 | switch (r_type) | |
3509 | { | |
3510 | default: | |
4c544807 L |
3511 | if (h->root.root.string) |
3512 | name = h->root.root.string; | |
3513 | else | |
3514 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3515 | NULL); | |
cbe950e9 L |
3516 | (*_bfd_error_handler) |
3517 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3518 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3519 | elf_howto_table[r_type].name, | |
4c544807 | 3520 | name, __FUNCTION__); |
cbe950e9 L |
3521 | bfd_set_error (bfd_error_bad_value); |
3522 | return FALSE; | |
3523 | ||
3524 | case R_386_32: | |
710ab287 | 3525 | /* Generate dynamic relcoation only when there is a |
c293fa49 | 3526 | non-GOT reference in a shared object. */ |
710ab287 L |
3527 | if (info->shared && h->non_got_ref) |
3528 | { | |
3529 | Elf_Internal_Rela outrel; | |
710ab287 L |
3530 | asection *sreloc; |
3531 | bfd_vma offset; | |
3532 | ||
c25bc9fc L |
3533 | /* Need a dynamic relocation to get the real function |
3534 | adddress. */ | |
710ab287 L |
3535 | offset = _bfd_elf_section_offset (output_bfd, |
3536 | info, | |
3537 | input_section, | |
3538 | rel->r_offset); | |
3539 | if (offset == (bfd_vma) -1 | |
3540 | || offset == (bfd_vma) -2) | |
3541 | abort (); | |
3542 | ||
3543 | outrel.r_offset = (input_section->output_section->vma | |
3544 | + input_section->output_offset | |
3545 | + offset); | |
3546 | ||
3547 | if (h->dynindx == -1 | |
44c4ea11 L |
3548 | || h->forced_local |
3549 | || info->executable) | |
710ab287 L |
3550 | { |
3551 | /* This symbol is resolved locally. */ | |
56b8aada L |
3552 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); |
3553 | bfd_put_32 (output_bfd, | |
3554 | (h->root.u.def.value | |
3555 | + h->root.u.def.section->output_section->vma | |
3556 | + h->root.u.def.section->output_offset), | |
3557 | contents + offset); | |
710ab287 L |
3558 | } |
3559 | else | |
56b8aada | 3560 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
710ab287 | 3561 | |
6de2ae4a | 3562 | sreloc = htab->elf.irelifunc; |
59d6ffb2 | 3563 | elf_append_rel (output_bfd, sreloc, &outrel); |
710ab287 L |
3564 | |
3565 | /* If this reloc is against an external symbol, we | |
3566 | do not want to fiddle with the addend. Otherwise, | |
3567 | we need to include the symbol value so that it | |
3568 | becomes an addend for the dynamic reloc. For an | |
3569 | internal symbol, we have updated addend. */ | |
56b8aada | 3570 | continue; |
710ab287 | 3571 | } |
d59a60e9 | 3572 | /* FALLTHROUGH */ |
cbe950e9 L |
3573 | case R_386_PC32: |
3574 | case R_386_PLT32: | |
3575 | goto do_relocation; | |
3576 | ||
3577 | case R_386_GOT32: | |
6de2ae4a | 3578 | base_got = htab->elf.sgot; |
cbe950e9 L |
3579 | off = h->got.offset; |
3580 | ||
7afd84dc | 3581 | if (base_got == NULL) |
cbe950e9 L |
3582 | abort (); |
3583 | ||
7afd84dc | 3584 | if (off == (bfd_vma) -1) |
cbe950e9 | 3585 | { |
7afd84dc L |
3586 | /* We can't use h->got.offset here to save state, or |
3587 | even just remember the offset, as finish_dynamic_symbol | |
3588 | would use that as offset into .got. */ | |
6bbec505 | 3589 | |
6de2ae4a | 3590 | if (htab->elf.splt != NULL) |
7afd84dc | 3591 | { |
25e762b9 | 3592 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3593 | off = (plt_index + 3) * 4; |
6de2ae4a | 3594 | base_got = htab->elf.sgotplt; |
7afd84dc | 3595 | } |
cbe950e9 L |
3596 | else |
3597 | { | |
25e762b9 | 3598 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3599 | off = plt_index * 4; |
6de2ae4a | 3600 | base_got = htab->elf.igotplt; |
7afd84dc L |
3601 | } |
3602 | ||
3603 | if (h->dynindx == -1 | |
3604 | || h->forced_local | |
3605 | || info->symbolic) | |
3606 | { | |
3607 | /* This references the local defitionion. We must | |
3608 | initialize this entry in the global offset table. | |
3609 | Since the offset must always be a multiple of 8, | |
3610 | we use the least significant bit to record | |
3611 | whether we have initialized it already. | |
3612 | ||
3613 | When doing a dynamic link, we create a .rela.got | |
3614 | relocation entry to initialize the value. This | |
3615 | is done in the finish_dynamic_symbol routine. */ | |
3616 | if ((off & 1) != 0) | |
3617 | off &= ~1; | |
3618 | else | |
3619 | { | |
3620 | bfd_put_32 (output_bfd, relocation, | |
3621 | base_got->contents + off); | |
3622 | h->got.offset |= 1; | |
3623 | } | |
cbe950e9 | 3624 | } |
cbe950e9 | 3625 | |
7afd84dc | 3626 | relocation = off; |
cbe950e9 | 3627 | |
7afd84dc | 3628 | /* Adjust for static executables. */ |
6de2ae4a | 3629 | if (htab->elf.splt == NULL) |
7afd84dc L |
3630 | relocation += gotplt->output_offset; |
3631 | } | |
3632 | else | |
0018b0a3 L |
3633 | { |
3634 | relocation = (base_got->output_section->vma | |
3635 | + base_got->output_offset + off | |
3636 | - gotplt->output_section->vma | |
3637 | - gotplt->output_offset); | |
3638 | /* Adjust for static executables. */ | |
6de2ae4a | 3639 | if (htab->elf.splt == NULL) |
0018b0a3 L |
3640 | relocation += gotplt->output_offset; |
3641 | } | |
3642 | ||
cbe950e9 L |
3643 | goto do_relocation; |
3644 | ||
3645 | case R_386_GOTOFF: | |
3646 | relocation -= (gotplt->output_section->vma | |
3647 | + gotplt->output_offset); | |
3648 | goto do_relocation; | |
3649 | } | |
3650 | } | |
3651 | ||
252b5132 RH |
3652 | switch (r_type) |
3653 | { | |
3654 | case R_386_GOT32: | |
3655 | /* Relocation is to the entry for this symbol in the global | |
3656 | offset table. */ | |
6de2ae4a | 3657 | if (htab->elf.sgot == NULL) |
ffb2e45b | 3658 | abort (); |
252b5132 RH |
3659 | |
3660 | if (h != NULL) | |
3661 | { | |
b34976b6 | 3662 | bfd_boolean dyn; |
252b5132 RH |
3663 | |
3664 | off = h->got.offset; | |
ebe50bae | 3665 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 3666 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 3667 | || (info->shared |
586119b3 | 3668 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3669 | || (ELF_ST_VISIBILITY (h->other) |
3670 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3671 | { |
3672 | /* This is actually a static link, or it is a | |
3673 | -Bsymbolic link and the symbol is defined | |
3674 | locally, or the symbol was forced to be local | |
3675 | because of a version file. We must initialize | |
3676 | this entry in the global offset table. Since the | |
3677 | offset must always be a multiple of 4, we use the | |
3678 | least significant bit to record whether we have | |
3679 | initialized it already. | |
3680 | ||
3681 | When doing a dynamic link, we create a .rel.got | |
3682 | relocation entry to initialize the value. This | |
3683 | is done in the finish_dynamic_symbol routine. */ | |
3684 | if ((off & 1) != 0) | |
3685 | off &= ~1; | |
3686 | else | |
3687 | { | |
3688 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 3689 | htab->elf.sgot->contents + off); |
252b5132 RH |
3690 | h->got.offset |= 1; |
3691 | } | |
3692 | } | |
8c694914 | 3693 | else |
b34976b6 | 3694 | unresolved_reloc = FALSE; |
252b5132 RH |
3695 | } |
3696 | else | |
3697 | { | |
ffb2e45b AM |
3698 | if (local_got_offsets == NULL) |
3699 | abort (); | |
252b5132 RH |
3700 | |
3701 | off = local_got_offsets[r_symndx]; | |
3702 | ||
3703 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3704 | the least significant bit to record whether we have |
3705 | already generated the necessary reloc. */ | |
252b5132 RH |
3706 | if ((off & 1) != 0) |
3707 | off &= ~1; | |
3708 | else | |
3709 | { | |
6725bdbf | 3710 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 3711 | htab->elf.sgot->contents + off); |
252b5132 RH |
3712 | |
3713 | if (info->shared) | |
3714 | { | |
947216bf AM |
3715 | asection *s; |
3716 | Elf_Internal_Rela outrel; | |
252b5132 | 3717 | |
6de2ae4a | 3718 | s = htab->elf.srelgot; |
947216bf | 3719 | if (s == NULL) |
ffb2e45b | 3720 | abort (); |
252b5132 | 3721 | |
6de2ae4a L |
3722 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3723 | + htab->elf.sgot->output_offset | |
252b5132 RH |
3724 | + off); |
3725 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 3726 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
3727 | } |
3728 | ||
3729 | local_got_offsets[r_symndx] |= 1; | |
3730 | } | |
252b5132 RH |
3731 | } |
3732 | ||
ffb2e45b AM |
3733 | if (off >= (bfd_vma) -2) |
3734 | abort (); | |
3735 | ||
6de2ae4a L |
3736 | relocation = htab->elf.sgot->output_section->vma |
3737 | + htab->elf.sgot->output_offset + off | |
3738 | - htab->elf.sgotplt->output_section->vma | |
3739 | - htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3740 | break; |
3741 | ||
3742 | case R_386_GOTOFF: | |
3743 | /* Relocation is relative to the start of the global offset | |
3744 | table. */ | |
3745 | ||
3d949995 L |
3746 | /* Check to make sure it isn't a protected function or data |
3747 | symbol for shared library since it may not be local when | |
3748 | used as function address or with copy relocation. We also | |
e3c0e327 | 3749 | need to make sure that a symbol is referenced locally. */ |
d5597ebc | 3750 | if (!info->executable && h) |
90f487df | 3751 | { |
41bed6dd L |
3752 | if (!h->def_regular) |
3753 | { | |
3754 | const char *v; | |
3755 | ||
3756 | switch (ELF_ST_VISIBILITY (h->other)) | |
3757 | { | |
3758 | case STV_HIDDEN: | |
3759 | v = _("hidden symbol"); | |
3760 | break; | |
3761 | case STV_INTERNAL: | |
3762 | v = _("internal symbol"); | |
3763 | break; | |
3764 | case STV_PROTECTED: | |
3765 | v = _("protected symbol"); | |
3766 | break; | |
3767 | default: | |
3768 | v = _("symbol"); | |
3769 | break; | |
3770 | } | |
3771 | ||
3772 | (*_bfd_error_handler) | |
3773 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
3774 | input_bfd, v, h->root.root.string); | |
3775 | bfd_set_error (bfd_error_bad_value); | |
3776 | return FALSE; | |
3777 | } | |
d5597ebc | 3778 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
3779 | && (h->type == STT_FUNC |
3780 | || h->type == STT_OBJECT) | |
41bed6dd L |
3781 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
3782 | { | |
3783 | (*_bfd_error_handler) | |
3d949995 L |
3784 | (_("%B: relocation R_386_GOTOFF against protected %s `%s' can not be used when making a shared object"), |
3785 | input_bfd, | |
3786 | h->type == STT_FUNC ? "function" : "data", | |
3787 | h->root.root.string); | |
41bed6dd L |
3788 | bfd_set_error (bfd_error_bad_value); |
3789 | return FALSE; | |
3790 | } | |
90f487df L |
3791 | } |
3792 | ||
8c37241b JJ |
3793 | /* Note that sgot is not involved in this |
3794 | calculation. We always want the start of .got.plt. If we | |
3795 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3796 | permitted by the ABI, we might have to change this |
3797 | calculation. */ | |
6de2ae4a L |
3798 | relocation -= htab->elf.sgotplt->output_section->vma |
3799 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3800 | break; |
3801 | ||
3802 | case R_386_GOTPC: | |
3803 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
3804 | relocation = htab->elf.sgotplt->output_section->vma |
3805 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 3806 | unresolved_reloc = FALSE; |
252b5132 RH |
3807 | break; |
3808 | ||
3809 | case R_386_PLT32: | |
3810 | /* Relocation is to the entry for this symbol in the | |
3811 | procedure linkage table. */ | |
3812 | ||
dd5724d5 | 3813 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3814 | without using the procedure linkage table. */ |
252b5132 RH |
3815 | if (h == NULL) |
3816 | break; | |
3817 | ||
dd7e64d4 L |
3818 | eh = (struct elf_i386_link_hash_entry *) h; |
3819 | if ((h->plt.offset == (bfd_vma) -1 | |
3820 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3821 | || htab->elf.splt == NULL) |
252b5132 RH |
3822 | { |
3823 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3824 | happens when statically linking PIC code, or when |
3825 | using -Bsymbolic. */ | |
252b5132 RH |
3826 | break; |
3827 | } | |
3828 | ||
dd7e64d4 L |
3829 | if (h->plt.offset != (bfd_vma) -1) |
3830 | { | |
3831 | resolved_plt = htab->elf.splt; | |
3832 | plt_offset = h->plt.offset; | |
3833 | } | |
3834 | else | |
3835 | { | |
3836 | resolved_plt = htab->plt_got; | |
3837 | plt_offset = eh->plt_got.offset; | |
3838 | } | |
3839 | ||
3840 | relocation = (resolved_plt->output_section->vma | |
3841 | + resolved_plt->output_offset | |
3842 | + plt_offset); | |
b34976b6 | 3843 | unresolved_reloc = FALSE; |
252b5132 RH |
3844 | break; |
3845 | ||
1788fc08 | 3846 | case R_386_SIZE32: |
1788fc08 L |
3847 | /* Set to symbol size. */ |
3848 | relocation = st_size; | |
3849 | /* Fall through. */ | |
3850 | ||
252b5132 RH |
3851 | case R_386_32: |
3852 | case R_386_PC32: | |
3348747a NS |
3853 | if ((input_section->flags & SEC_ALLOC) == 0 |
3854 | || is_vxworks_tls) | |
ec338859 AM |
3855 | break; |
3856 | ||
12d0ee4a | 3857 | if ((info->shared |
ef5aade5 L |
3858 | && (h == NULL |
3859 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3860 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 | 3861 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 3862 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
3863 | || (ELIMINATE_COPY_RELOCS |
3864 | && !info->shared | |
12d0ee4a AM |
3865 | && h != NULL |
3866 | && h->dynindx != -1 | |
f5385ebf AM |
3867 | && !h->non_got_ref |
3868 | && ((h->def_dynamic | |
3869 | && !h->def_regular) | |
28d0b90e | 3870 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3871 | || h->root.type == bfd_link_hash_undefined))) |
252b5132 | 3872 | { |
947216bf | 3873 | Elf_Internal_Rela outrel; |
b34976b6 | 3874 | bfd_boolean skip, relocate; |
0c715baa | 3875 | asection *sreloc; |
252b5132 RH |
3876 | |
3877 | /* When generating a shared object, these relocations | |
3878 | are copied into the output file to be resolved at run | |
3879 | time. */ | |
3880 | ||
b34976b6 AM |
3881 | skip = FALSE; |
3882 | relocate = FALSE; | |
252b5132 | 3883 | |
c629eae0 JJ |
3884 | outrel.r_offset = |
3885 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3886 | rel->r_offset); | |
3887 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 3888 | skip = TRUE; |
0bb2d96a | 3889 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3890 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
3891 | outrel.r_offset += (input_section->output_section->vma |
3892 | + input_section->output_offset); | |
3893 | ||
3894 | if (skip) | |
0bb2d96a | 3895 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
3896 | else if (h != NULL |
3897 | && h->dynindx != -1 | |
3898 | && (r_type == R_386_PC32 | |
3899 | || !info->shared | |
55255dae | 3900 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 3901 | || !h->def_regular)) |
0bb2d96a | 3902 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
3903 | else |
3904 | { | |
5a15f56f | 3905 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 3906 | relocate = TRUE; |
5a15f56f | 3907 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
3908 | } |
3909 | ||
cbe950e9 | 3910 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 3911 | |
62d78908 L |
3912 | if (sreloc == NULL || sreloc->contents == NULL) |
3913 | { | |
3914 | r = bfd_reloc_notsupported; | |
3915 | goto check_relocation_error; | |
3916 | } | |
0c715baa | 3917 | |
59d6ffb2 | 3918 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
3919 | |
3920 | /* If this reloc is against an external symbol, we do | |
3921 | not want to fiddle with the addend. Otherwise, we | |
3922 | need to include the symbol value so that it becomes | |
3923 | an addend for the dynamic reloc. */ | |
0f88be7a | 3924 | if (! relocate) |
252b5132 RH |
3925 | continue; |
3926 | } | |
252b5132 RH |
3927 | break; |
3928 | ||
37e55690 | 3929 | case R_386_TLS_IE: |
1d85728f | 3930 | if (!info->executable) |
37e55690 | 3931 | { |
947216bf | 3932 | Elf_Internal_Rela outrel; |
37e55690 | 3933 | asection *sreloc; |
37e55690 JJ |
3934 | |
3935 | outrel.r_offset = rel->r_offset | |
3936 | + input_section->output_section->vma | |
3937 | + input_section->output_offset; | |
3938 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3939 | sreloc = elf_section_data (input_section)->sreloc; | |
3940 | if (sreloc == NULL) | |
3941 | abort (); | |
59d6ffb2 | 3942 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3943 | } |
3944 | /* Fall through */ | |
3945 | ||
13ae64f3 | 3946 | case R_386_TLS_GD: |
67a4f2b7 AO |
3947 | case R_386_TLS_GOTDESC: |
3948 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 3949 | case R_386_TLS_IE_32: |
37e55690 | 3950 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
3951 | tls_type = GOT_UNKNOWN; |
3952 | if (h == NULL && local_got_offsets) | |
3953 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
3954 | else if (h != NULL) | |
142411ca | 3955 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
3956 | if (tls_type == GOT_TLS_IE) |
3957 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
3958 | |
3959 | if (! elf_i386_tls_transition (info, input_bfd, | |
3960 | input_section, contents, | |
3961 | symtab_hdr, sym_hashes, | |
3962 | &r_type, tls_type, rel, | |
4c544807 | 3963 | relend, h, r_symndx)) |
142411ca | 3964 | return FALSE; |
13ae64f3 JJ |
3965 | |
3966 | if (r_type == R_386_TLS_LE_32) | |
3967 | { | |
82e51918 | 3968 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3969 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
3970 | { | |
142411ca | 3971 | unsigned int type; |
13ae64f3 JJ |
3972 | bfd_vma roff; |
3973 | ||
3974 | /* GD->LE transition. */ | |
13ae64f3 | 3975 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3976 | if (type == 0x04) |
3977 | { | |
3978 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3979 | Change it into: | |
3980 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3981 | (6 byte form of subl). */ | |
13ae64f3 JJ |
3982 | memcpy (contents + rel->r_offset - 3, |
3983 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 3984 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
3985 | } |
3986 | else | |
3987 | { | |
142411ca L |
3988 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
3989 | Change it into: | |
3990 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3991 | (6 byte form of subl). */ | |
3992 | memcpy (contents + rel->r_offset - 2, | |
3993 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
3994 | roff = rel->r_offset + 6; | |
13ae64f3 | 3995 | } |
eb4ff4d6 | 3996 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 3997 | contents + roff); |
a3fadc9a | 3998 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
3999 | rel++; |
4000 | continue; | |
4001 | } | |
67a4f2b7 AO |
4002 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4003 | { | |
4004 | /* GDesc -> LE transition. | |
4005 | It's originally something like: | |
4006 | leal x@tlsdesc(%ebx), %eax | |
4007 | ||
4008 | leal x@ntpoff, %eax | |
4009 | ||
4010 | Registers other than %eax may be set up here. */ | |
4011 | ||
142411ca | 4012 | unsigned int val; |
67a4f2b7 AO |
4013 | bfd_vma roff; |
4014 | ||
67a4f2b7 | 4015 | roff = rel->r_offset; |
67a4f2b7 | 4016 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4017 | |
4018 | /* Now modify the instruction as appropriate. */ | |
4019 | /* aoliva FIXME: remove the above and xor the byte | |
4020 | below with 0x86. */ | |
4021 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4022 | contents + roff - 1); | |
eb4ff4d6 | 4023 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4024 | contents + roff); |
4025 | continue; | |
4026 | } | |
4027 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4028 | { | |
4029 | /* GDesc -> LE transition. | |
4030 | It's originally: | |
4031 | call *(%eax) | |
4032 | Turn it into: | |
142411ca | 4033 | xchg %ax,%ax */ |
67a4f2b7 | 4034 | |
67a4f2b7 | 4035 | bfd_vma roff; |
6bbec505 | 4036 | |
67a4f2b7 | 4037 | roff = rel->r_offset; |
10efb593 | 4038 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4039 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4040 | continue; | |
4041 | } | |
37e55690 | 4042 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4043 | { |
142411ca | 4044 | unsigned int val; |
13ae64f3 JJ |
4045 | |
4046 | /* IE->LE transition: | |
37e55690 JJ |
4047 | Originally it can be one of: |
4048 | movl foo, %eax | |
4049 | movl foo, %reg | |
4050 | addl foo, %reg | |
4051 | We change it into: | |
4052 | movl $foo, %eax | |
4053 | movl $foo, %reg | |
4054 | addl $foo, %reg. */ | |
37e55690 | 4055 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4056 | if (val == 0xa1) |
4057 | { | |
4058 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4059 | bfd_put_8 (output_bfd, 0xb8, |
4060 | contents + rel->r_offset - 1); | |
37e55690 | 4061 | } |
299bf759 | 4062 | else |
37e55690 | 4063 | { |
142411ca L |
4064 | unsigned int type; |
4065 | ||
55fd94b0 AM |
4066 | type = bfd_get_8 (input_bfd, |
4067 | contents + rel->r_offset - 2); | |
299bf759 | 4068 | switch (type) |
26e41594 | 4069 | { |
299bf759 L |
4070 | case 0x8b: |
4071 | /* movl */ | |
299bf759 L |
4072 | bfd_put_8 (output_bfd, 0xc7, |
4073 | contents + rel->r_offset - 2); | |
4074 | bfd_put_8 (output_bfd, | |
4075 | 0xc0 | ((val >> 3) & 7), | |
4076 | contents + rel->r_offset - 1); | |
4077 | break; | |
4078 | case 0x03: | |
4079 | /* addl */ | |
299bf759 L |
4080 | bfd_put_8 (output_bfd, 0x81, |
4081 | contents + rel->r_offset - 2); | |
4082 | bfd_put_8 (output_bfd, | |
4083 | 0xc0 | ((val >> 3) & 7), | |
4084 | contents + rel->r_offset - 1); | |
4085 | break; | |
4086 | default: | |
4087 | BFD_FAIL (); | |
4088 | break; | |
26e41594 | 4089 | } |
37e55690 | 4090 | } |
eb4ff4d6 | 4091 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4092 | contents + rel->r_offset); |
4093 | continue; | |
4094 | } | |
4095 | else | |
4096 | { | |
4097 | unsigned int val, type; | |
4098 | ||
4099 | /* {IE_32,GOTIE}->LE transition: | |
4100 | Originally it can be one of: | |
13ae64f3 | 4101 | subl foo(%reg1), %reg2 |
13ae64f3 | 4102 | movl foo(%reg1), %reg2 |
37e55690 | 4103 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4104 | We change it into: |
4105 | subl $foo, %reg2 | |
37e55690 JJ |
4106 | movl $foo, %reg2 (6 byte form) |
4107 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4108 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4109 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4110 | if (type == 0x8b) |
4111 | { | |
4112 | /* movl */ | |
13ae64f3 JJ |
4113 | bfd_put_8 (output_bfd, 0xc7, |
4114 | contents + rel->r_offset - 2); | |
4115 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4116 | contents + rel->r_offset - 1); | |
4117 | } | |
4118 | else if (type == 0x2b) | |
4119 | { | |
4120 | /* subl */ | |
13ae64f3 JJ |
4121 | bfd_put_8 (output_bfd, 0x81, |
4122 | contents + rel->r_offset - 2); | |
4123 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4124 | contents + rel->r_offset - 1); | |
4125 | } | |
37e55690 JJ |
4126 | else if (type == 0x03) |
4127 | { | |
4128 | /* addl */ | |
4129 | bfd_put_8 (output_bfd, 0x81, | |
4130 | contents + rel->r_offset - 2); | |
4131 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4132 | contents + rel->r_offset - 1); | |
4133 | } | |
13ae64f3 JJ |
4134 | else |
4135 | BFD_FAIL (); | |
37e55690 | 4136 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4137 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4138 | contents + rel->r_offset); |
4139 | else | |
eb4ff4d6 | 4140 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4141 | contents + rel->r_offset); |
13ae64f3 JJ |
4142 | continue; |
4143 | } | |
4144 | } | |
4145 | ||
6de2ae4a | 4146 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4147 | abort (); |
4148 | ||
4149 | if (h != NULL) | |
67a4f2b7 AO |
4150 | { |
4151 | off = h->got.offset; | |
4152 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4153 | } | |
13ae64f3 JJ |
4154 | else |
4155 | { | |
4156 | if (local_got_offsets == NULL) | |
4157 | abort (); | |
4158 | ||
4159 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4160 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4161 | } |
4162 | ||
4163 | if ((off & 1) != 0) | |
4164 | off &= ~1; | |
26e41594 | 4165 | else |
13ae64f3 | 4166 | { |
947216bf | 4167 | Elf_Internal_Rela outrel; |
91d6fa6a | 4168 | int dr_type; |
67a4f2b7 | 4169 | asection *sreloc; |
13ae64f3 | 4170 | |
6de2ae4a | 4171 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4172 | abort (); |
4173 | ||
67a4f2b7 AO |
4174 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4175 | ||
4176 | if (GOT_TLS_GDESC_P (tls_type)) | |
4177 | { | |
59d6ffb2 | 4178 | bfd_byte *loc; |
67a4f2b7 AO |
4179 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4180 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4181 | <= htab->elf.sgotplt->size); |
4182 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4183 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4184 | + offplt |
4185 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4186 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4187 | loc = sreloc->contents; |
5ae0bfb6 RS |
4188 | loc += (htab->next_tls_desc_index++ |
4189 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4190 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4191 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4192 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4193 | if (indx == 0) | |
4194 | { | |
4195 | BFD_ASSERT (! unresolved_reloc); | |
4196 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4197 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4198 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4199 | + htab->sgotplt_jump_table_size + 4); |
4200 | } | |
4201 | else | |
4202 | { | |
4203 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4204 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4205 | + htab->sgotplt_jump_table_size + 4); |
4206 | } | |
4207 | } | |
4208 | ||
6de2ae4a | 4209 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4210 | |
6de2ae4a L |
4211 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4212 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4213 | |
67a4f2b7 | 4214 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4215 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4216 | else if (GOT_TLS_GDESC_P (tls_type)) |
4217 | goto dr_done; | |
37e55690 JJ |
4218 | else if (tls_type == GOT_TLS_IE_POS) |
4219 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4220 | else |
4221 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4222 | |
37e55690 | 4223 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4224 | bfd_put_32 (output_bfd, |
4225 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4226 | htab->elf.sgot->contents + off); |
37e55690 | 4227 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4228 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4229 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4230 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4231 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4232 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4233 | htab->elf.sgot->contents + off); |
13ae64f3 | 4234 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4235 | |
59d6ffb2 | 4236 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4237 | |
67a4f2b7 | 4238 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4239 | { |
4240 | if (indx == 0) | |
4241 | { | |
82e51918 | 4242 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4243 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4244 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4245 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4246 | } |
4247 | else | |
4248 | { | |
4249 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4250 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4251 | outrel.r_info = ELF32_R_INFO (indx, |
4252 | R_386_TLS_DTPOFF32); | |
4253 | outrel.r_offset += 4; | |
59d6ffb2 | 4254 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4255 | } |
4256 | } | |
37e55690 JJ |
4257 | else if (tls_type == GOT_TLS_IE_BOTH) |
4258 | { | |
4259 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4260 | (indx == 0 |
4261 | ? relocation - elf_i386_dtpoff_base (info) | |
4262 | : 0), | |
6de2ae4a | 4263 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4264 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4265 | outrel.r_offset += 4; | |
59d6ffb2 | 4266 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4267 | } |
13ae64f3 | 4268 | |
67a4f2b7 | 4269 | dr_done: |
13ae64f3 JJ |
4270 | if (h != NULL) |
4271 | h->got.offset |= 1; | |
4272 | else | |
4273 | local_got_offsets[r_symndx] |= 1; | |
4274 | } | |
4275 | ||
67a4f2b7 AO |
4276 | if (off >= (bfd_vma) -2 |
4277 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4278 | abort (); |
67a4f2b7 AO |
4279 | if (r_type == R_386_TLS_GOTDESC |
4280 | || r_type == R_386_TLS_DESC_CALL) | |
4281 | { | |
4282 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4283 | unresolved_reloc = FALSE; | |
4284 | } | |
4285 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4286 | { |
6de2ae4a L |
4287 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4288 | + htab->elf.sgotplt->output_offset; | |
4289 | relocation = htab->elf.sgot->output_section->vma | |
4290 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4291 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4292 | && tls_type == GOT_TLS_IE_BOTH) | |
4293 | relocation += 4; | |
4294 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4295 | relocation += g_o_t; |
b34976b6 | 4296 | unresolved_reloc = FALSE; |
13ae64f3 | 4297 | } |
67a4f2b7 | 4298 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4299 | { |
4300 | unsigned int val, type; | |
4301 | bfd_vma roff; | |
4302 | ||
4303 | /* GD->IE transition. */ | |
13ae64f3 | 4304 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4305 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
4306 | if (type == 0x04) | |
4307 | { | |
4308 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4309 | Change it into: | |
4310 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 4311 | val >>= 3; |
142411ca | 4312 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4313 | } |
4314 | else | |
4315 | { | |
4316 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
4317 | Change it into: | |
4318 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4319 | roff = rel->r_offset - 2; |
4320 | } | |
4321 | memcpy (contents + roff, | |
4322 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4323 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4324 | /* If foo is used only with foo@gotntpoff(%reg) and |
4325 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4326 | subl $foo@gottpoff(%reg), %eax | |
4327 | into: | |
4328 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4329 | if (tls_type == GOT_TLS_IE_POS) |
4330 | contents[roff + 6] = 0x03; | |
8c37241b | 4331 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4332 | htab->elf.sgot->output_section->vma |
4333 | + htab->elf.sgot->output_offset + off | |
4334 | - htab->elf.sgotplt->output_section->vma | |
4335 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 JJ |
4336 | contents + roff + 8); |
4337 | /* Skip R_386_PLT32. */ | |
4338 | rel++; | |
4339 | continue; | |
4340 | } | |
67a4f2b7 AO |
4341 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4342 | { | |
4343 | /* GDesc -> IE transition. | |
4344 | It's originally something like: | |
4345 | leal x@tlsdesc(%ebx), %eax | |
4346 | ||
4347 | Change it to: | |
142411ca | 4348 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4349 | or: |
4350 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4351 | ||
4352 | Registers other than %eax may be set up here. */ | |
4353 | ||
67a4f2b7 AO |
4354 | bfd_vma roff; |
4355 | ||
4356 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4357 | offset into any register, although it's probably | |
4358 | almost always going to be eax. */ | |
4359 | roff = rel->r_offset; | |
67a4f2b7 AO |
4360 | |
4361 | /* Now modify the instruction as appropriate. */ | |
4362 | /* To turn a leal into a movl in the form we use it, it | |
4363 | suffices to change the first byte from 0x8d to 0x8b. | |
4364 | aoliva FIXME: should we decide to keep the leal, all | |
4365 | we have to do is remove the statement below, and | |
4366 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4367 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4368 | ||
4369 | if (tls_type == GOT_TLS_IE_BOTH) | |
4370 | off += 4; | |
4371 | ||
4372 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4373 | htab->elf.sgot->output_section->vma |
4374 | + htab->elf.sgot->output_offset + off | |
4375 | - htab->elf.sgotplt->output_section->vma | |
4376 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4377 | contents + roff); |
4378 | continue; | |
4379 | } | |
4380 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4381 | { | |
4382 | /* GDesc -> IE transition. | |
4383 | It's originally: | |
4384 | call *(%eax) | |
4385 | ||
4386 | Change it to: | |
142411ca | 4387 | xchg %ax,%ax |
67a4f2b7 AO |
4388 | or |
4389 | negl %eax | |
4390 | depending on how we transformed the TLS_GOTDESC above. | |
4391 | */ | |
4392 | ||
67a4f2b7 AO |
4393 | bfd_vma roff; |
4394 | ||
67a4f2b7 | 4395 | roff = rel->r_offset; |
67a4f2b7 AO |
4396 | |
4397 | /* Now modify the instruction as appropriate. */ | |
4398 | if (tls_type != GOT_TLS_IE_NEG) | |
4399 | { | |
10efb593 L |
4400 | /* xchg %ax,%ax */ |
4401 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4402 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4403 | } | |
4404 | else | |
4405 | { | |
4406 | /* negl %eax */ | |
4407 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4408 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4409 | } | |
4410 | ||
4411 | continue; | |
4412 | } | |
4413 | else | |
4414 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4415 | break; |
4416 | ||
4417 | case R_386_TLS_LDM: | |
142411ca L |
4418 | if (! elf_i386_tls_transition (info, input_bfd, |
4419 | input_section, contents, | |
4420 | symtab_hdr, sym_hashes, | |
4421 | &r_type, GOT_UNKNOWN, rel, | |
4c544807 | 4422 | relend, h, r_symndx)) |
142411ca | 4423 | return FALSE; |
13ae64f3 | 4424 | |
142411ca L |
4425 | if (r_type != R_386_TLS_LDM) |
4426 | { | |
13ae64f3 | 4427 | /* LD->LE transition: |
13ae64f3 JJ |
4428 | leal foo(%reg), %eax; call ___tls_get_addr. |
4429 | We change it into: | |
4430 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4431 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4432 | memcpy (contents + rel->r_offset - 2, |
4433 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4434 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
4435 | rel++; |
4436 | continue; | |
4437 | } | |
4438 | ||
6de2ae4a | 4439 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4440 | abort (); |
4441 | ||
4442 | off = htab->tls_ldm_got.offset; | |
4443 | if (off & 1) | |
4444 | off &= ~1; | |
4445 | else | |
4446 | { | |
947216bf | 4447 | Elf_Internal_Rela outrel; |
13ae64f3 | 4448 | |
6de2ae4a | 4449 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4450 | abort (); |
4451 | ||
6de2ae4a L |
4452 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4453 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4454 | |
4455 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4456 | htab->elf.sgot->contents + off); |
13ae64f3 | 4457 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4458 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4459 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 4460 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
4461 | htab->tls_ldm_got.offset |= 1; |
4462 | } | |
6de2ae4a L |
4463 | relocation = htab->elf.sgot->output_section->vma |
4464 | + htab->elf.sgot->output_offset + off | |
4465 | - htab->elf.sgotplt->output_section->vma | |
4466 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 4467 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4468 | break; |
4469 | ||
4470 | case R_386_TLS_LDO_32: | |
959b0961 | 4471 | if (!info->executable || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 4472 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
4473 | else |
4474 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4475 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4476 | break; |
4477 | ||
4478 | case R_386_TLS_LE_32: | |
13ae64f3 | 4479 | case R_386_TLS_LE: |
1d85728f | 4480 | if (!info->executable) |
37e55690 | 4481 | { |
947216bf | 4482 | Elf_Internal_Rela outrel; |
37e55690 | 4483 | asection *sreloc; |
37e55690 JJ |
4484 | |
4485 | outrel.r_offset = rel->r_offset | |
4486 | + input_section->output_section->vma | |
4487 | + input_section->output_offset; | |
4488 | if (h != NULL && h->dynindx != -1) | |
4489 | indx = h->dynindx; | |
4490 | else | |
4491 | indx = 0; | |
4492 | if (r_type == R_386_TLS_LE_32) | |
4493 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4494 | else | |
4495 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4496 | sreloc = elf_section_data (input_section)->sreloc; | |
4497 | if (sreloc == NULL) | |
4498 | abort (); | |
59d6ffb2 | 4499 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4500 | if (indx) |
4501 | continue; | |
4502 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4503 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 4504 | else |
eb4ff4d6 | 4505 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
4506 | } |
4507 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4508 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4509 | else |
eb4ff4d6 | 4510 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4511 | break; |
4512 | ||
252b5132 RH |
4513 | default: |
4514 | break; | |
4515 | } | |
4516 | ||
239e1f3a AM |
4517 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4518 | because such sections are not SEC_ALLOC and thus ld.so will | |
4519 | not process them. */ | |
8c694914 | 4520 | if (unresolved_reloc |
239e1f3a | 4521 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4522 | && h->def_dynamic) |
4523 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4524 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
4525 | { |
4526 | (*_bfd_error_handler) | |
843fe662 | 4527 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4528 | input_bfd, |
4529 | input_section, | |
6a30718d | 4530 | (long) rel->r_offset, |
843fe662 | 4531 | howto->name, |
6a30718d | 4532 | h->root.root.string); |
b34976b6 | 4533 | return FALSE; |
6a30718d | 4534 | } |
83be169b | 4535 | |
cbe950e9 | 4536 | do_relocation: |
252b5132 RH |
4537 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4538 | contents, rel->r_offset, | |
55fd94b0 | 4539 | relocation, 0); |
252b5132 | 4540 | |
62d78908 | 4541 | check_relocation_error: |
cf5c0c5b | 4542 | if (r != bfd_reloc_ok) |
252b5132 | 4543 | { |
cf5c0c5b | 4544 | const char *name; |
ffb2e45b | 4545 | |
cf5c0c5b AM |
4546 | if (h != NULL) |
4547 | name = h->root.root.string; | |
4548 | else | |
4549 | { | |
4550 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4551 | symtab_hdr->sh_link, | |
4552 | sym->st_name); | |
4553 | if (name == NULL) | |
b34976b6 | 4554 | return FALSE; |
cf5c0c5b AM |
4555 | if (*name == '\0') |
4556 | name = bfd_section_name (input_bfd, sec); | |
4557 | } | |
ffb2e45b | 4558 | |
cf5c0c5b AM |
4559 | if (r == bfd_reloc_overflow) |
4560 | { | |
cf5c0c5b | 4561 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4562 | (info, (h ? &h->root : NULL), name, howto->name, |
4563 | (bfd_vma) 0, input_bfd, input_section, | |
4564 | rel->r_offset))) | |
b34976b6 | 4565 | return FALSE; |
cf5c0c5b AM |
4566 | } |
4567 | else | |
4568 | { | |
4569 | (*_bfd_error_handler) | |
d003868e AM |
4570 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4571 | input_bfd, input_section, | |
cf5c0c5b | 4572 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4573 | return FALSE; |
cf5c0c5b | 4574 | } |
252b5132 RH |
4575 | } |
4576 | } | |
4577 | ||
b34976b6 | 4578 | return TRUE; |
252b5132 RH |
4579 | } |
4580 | ||
4581 | /* Finish up dynamic symbol handling. We set the contents of various | |
4582 | dynamic sections here. */ | |
4583 | ||
b34976b6 | 4584 | static bfd_boolean |
55fd94b0 AM |
4585 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4586 | struct bfd_link_info *info, | |
4587 | struct elf_link_hash_entry *h, | |
4588 | Elf_Internal_Sym *sym) | |
252b5132 | 4589 | { |
6725bdbf | 4590 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
4591 | unsigned plt_entry_size; |
4592 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 4593 | struct elf_i386_link_hash_entry *eh; |
252b5132 | 4594 | |
6725bdbf | 4595 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4596 | if (htab == NULL) |
4597 | return FALSE; | |
252b5132 | 4598 | |
25e762b9 RM |
4599 | abed = get_elf_i386_backend_data (output_bfd); |
4600 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
4601 | ||
dd7e64d4 L |
4602 | eh = (struct elf_i386_link_hash_entry *) h; |
4603 | ||
252b5132 RH |
4604 | if (h->plt.offset != (bfd_vma) -1) |
4605 | { | |
252b5132 RH |
4606 | bfd_vma plt_index; |
4607 | bfd_vma got_offset; | |
947216bf AM |
4608 | Elf_Internal_Rela rel; |
4609 | bfd_byte *loc; | |
cbe950e9 L |
4610 | asection *plt, *gotplt, *relplt; |
4611 | ||
4612 | /* When building a static executable, use .iplt, .igot.plt and | |
4613 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4614 | if (htab->elf.splt != NULL) |
cbe950e9 | 4615 | { |
6de2ae4a L |
4616 | plt = htab->elf.splt; |
4617 | gotplt = htab->elf.sgotplt; | |
4618 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4619 | } |
4620 | else | |
4621 | { | |
6de2ae4a L |
4622 | plt = htab->elf.iplt; |
4623 | gotplt = htab->elf.igotplt; | |
4624 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4625 | } |
252b5132 RH |
4626 | |
4627 | /* This symbol has an entry in the procedure linkage table. Set | |
4628 | it up. */ | |
4629 | ||
cbe950e9 L |
4630 | if ((h->dynindx == -1 |
4631 | && !((h->forced_local || info->executable) | |
4632 | && h->def_regular | |
4633 | && h->type == STT_GNU_IFUNC)) | |
4634 | || plt == NULL | |
4635 | || gotplt == NULL | |
4636 | || relplt == NULL) | |
cec7f46a | 4637 | abort (); |
252b5132 RH |
4638 | |
4639 | /* Get the index in the procedure linkage table which | |
4640 | corresponds to this symbol. This is the index of this symbol | |
4641 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4642 | first entry in the procedure linkage table is reserved. |
252b5132 | 4643 | |
cbe950e9 | 4644 | Get the offset into the .got table of the entry that |
252b5132 | 4645 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 4646 | The first three are reserved. |
6bbec505 | 4647 | |
cbe950e9 L |
4648 | For static executables, we don't reserve anything. */ |
4649 | ||
6de2ae4a | 4650 | if (plt == htab->elf.splt) |
cbe950e9 | 4651 | { |
e1f98742 L |
4652 | got_offset = h->plt.offset / plt_entry_size - 1; |
4653 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
4654 | } |
4655 | else | |
4656 | { | |
e1f98742 L |
4657 | got_offset = h->plt.offset / plt_entry_size; |
4658 | got_offset = got_offset * 4; | |
cbe950e9 | 4659 | } |
252b5132 RH |
4660 | |
4661 | /* Fill in the entry in the procedure linkage table. */ | |
4662 | if (! info->shared) | |
4663 | { | |
25e762b9 RM |
4664 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
4665 | abed->plt->plt_entry_size); | |
252b5132 | 4666 | bfd_put_32 (output_bfd, |
cbe950e9 L |
4667 | (gotplt->output_section->vma |
4668 | + gotplt->output_offset | |
252b5132 | 4669 | + got_offset), |
25e762b9 RM |
4670 | plt->contents + h->plt.offset |
4671 | + abed->plt->plt_got_offset); | |
eac338cf | 4672 | |
25e762b9 | 4673 | if (abed->is_vxworks) |
eac338cf PB |
4674 | { |
4675 | int s, k, reloc_index; | |
4676 | ||
4677 | /* Create the R_386_32 relocation referencing the GOT | |
4678 | for this PLT entry. */ | |
4679 | ||
4680 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
4681 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
4682 | / abed->plt->plt_entry_size); | |
eac338cf PB |
4683 | /* K: Number of relocations for PLTResolve. */ |
4684 | if (info->shared) | |
4685 | k = PLTRESOLVE_RELOCS_SHLIB; | |
4686 | else | |
4687 | k = PLTRESOLVE_RELOCS; | |
4688 | /* Skip the PLTresolve relocations, and the relocations for | |
4689 | the other PLT slots. */ | |
4690 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
4691 | loc = (htab->srelplt2->contents + reloc_index | |
4692 | * sizeof (Elf32_External_Rel)); | |
4693 | ||
6de2ae4a L |
4694 | rel.r_offset = (htab->elf.splt->output_section->vma |
4695 | + htab->elf.splt->output_offset | |
eac338cf | 4696 | + h->plt.offset + 2), |
7325306f | 4697 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4698 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4699 | ||
4700 | /* Create the R_386_32 relocation referencing the beginning of | |
4701 | the PLT for this GOT entry. */ | |
6de2ae4a L |
4702 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
4703 | + htab->elf.sgotplt->output_offset | |
eac338cf | 4704 | + got_offset); |
7325306f | 4705 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 4706 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 4707 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 4708 | } |
252b5132 RH |
4709 | } |
4710 | else | |
4711 | { | |
25e762b9 RM |
4712 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
4713 | abed->plt->plt_entry_size); | |
252b5132 | 4714 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
4715 | plt->contents + h->plt.offset |
4716 | + abed->plt->plt_got_offset); | |
252b5132 RH |
4717 | } |
4718 | ||
252b5132 RH |
4719 | /* Fill in the entry in the global offset table. */ |
4720 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4721 | (plt->output_section->vma |
4722 | + plt->output_offset | |
252b5132 | 4723 | + h->plt.offset |
25e762b9 | 4724 | + abed->plt->plt_lazy_offset), |
cbe950e9 | 4725 | gotplt->contents + got_offset); |
252b5132 RH |
4726 | |
4727 | /* Fill in the entry in the .rel.plt section. */ | |
cbe950e9 L |
4728 | rel.r_offset = (gotplt->output_section->vma |
4729 | + gotplt->output_offset | |
252b5132 | 4730 | + got_offset); |
cbe950e9 L |
4731 | if (h->dynindx == -1 |
4732 | || ((info->executable | |
4733 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4734 | && h->def_regular | |
4735 | && h->type == STT_GNU_IFUNC)) | |
4736 | { | |
4737 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4738 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
4739 | in the .got.plt section. */ | |
4740 | bfd_put_32 (output_bfd, | |
23209a78 | 4741 | (h->root.u.def.value |
cbe950e9 L |
4742 | + h->root.u.def.section->output_section->vma |
4743 | + h->root.u.def.section->output_offset), | |
4744 | gotplt->contents + got_offset); | |
4745 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
e1f98742 L |
4746 | /* R_386_IRELATIVE comes last. */ |
4747 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4748 | } |
4749 | else | |
e1f98742 L |
4750 | { |
4751 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
4752 | plt_index = htab->next_jump_slot_index++; | |
4753 | } | |
cbe950e9 | 4754 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); |
0ac8d2ca | 4755 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 4756 | |
e1f98742 L |
4757 | /* Don't fill PLT entry for static executables. */ |
4758 | if (plt == htab->elf.splt) | |
4759 | { | |
4760 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
4761 | plt->contents + h->plt.offset | |
4762 | + abed->plt->plt_reloc_offset); | |
4763 | bfd_put_32 (output_bfd, - (h->plt.offset | |
4764 | + abed->plt->plt_plt_offset + 4), | |
4765 | plt->contents + h->plt.offset | |
4766 | + abed->plt->plt_plt_offset); | |
4767 | } | |
dd7e64d4 L |
4768 | } |
4769 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4770 | { | |
4771 | bfd_vma got_offset, plt_offset; | |
4772 | asection *plt, *got, *gotplt; | |
4773 | const bfd_byte *got_plt_entry; | |
4774 | ||
4775 | /* Offset of displacement of the indirect jump. */ | |
4776 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 4777 | |
dd7e64d4 L |
4778 | /* Set the entry in the GOT procedure linkage table. */ |
4779 | plt = htab->plt_got; | |
4780 | got = htab->elf.sgot; | |
4781 | gotplt = htab->elf.sgotplt; | |
4782 | got_offset = h->got.offset; | |
4783 | ||
4784 | if (got_offset == (bfd_vma) -1 | |
4785 | || plt == NULL | |
4786 | || got == NULL | |
4787 | || gotplt == NULL) | |
4788 | abort (); | |
4789 | ||
4790 | /* Fill in the entry in the GOT procedure linkage table. */ | |
4791 | if (! info->shared) | |
252b5132 | 4792 | { |
dd7e64d4 L |
4793 | got_plt_entry = elf_i386_got_plt_entry; |
4794 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 4795 | } |
dd7e64d4 L |
4796 | else |
4797 | { | |
4798 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
4799 | got_offset += (got->output_section->vma | |
4800 | + got->output_offset | |
4801 | - gotplt->output_section->vma | |
4802 | - gotplt->output_offset); | |
4803 | } | |
4804 | ||
4805 | plt_offset = eh->plt_got.offset; | |
4806 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
4807 | sizeof (elf_i386_got_plt_entry)); | |
4808 | bfd_put_32 (output_bfd, got_offset, | |
4809 | plt->contents + plt_offset + plt_got_offset); | |
4810 | } | |
4811 | ||
4812 | if (!h->def_regular | |
4813 | && (h->plt.offset != (bfd_vma) -1 | |
4814 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4815 | { | |
4816 | /* Mark the symbol as undefined, rather than as defined in | |
4817 | the .plt section. Leave the value if there were any | |
4818 | relocations where pointer equality matters (this is a clue | |
4819 | for the dynamic linker, to make function pointer | |
4820 | comparisons work between an application and shared | |
4821 | library), otherwise set it to zero. If a function is only | |
4822 | called from a binary, there is no need to slow down | |
4823 | shared libraries because of that. */ | |
4824 | sym->st_shndx = SHN_UNDEF; | |
4825 | if (!h->pointer_equality_needed) | |
4826 | sym->st_value = 0; | |
252b5132 RH |
4827 | } |
4828 | ||
13ae64f3 | 4829 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 4830 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 4831 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 4832 | { |
947216bf | 4833 | Elf_Internal_Rela rel; |
252b5132 RH |
4834 | |
4835 | /* This symbol has an entry in the global offset table. Set it | |
4836 | up. */ | |
4837 | ||
6de2ae4a | 4838 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 4839 | abort (); |
252b5132 | 4840 | |
6de2ae4a L |
4841 | rel.r_offset = (htab->elf.sgot->output_section->vma |
4842 | + htab->elf.sgot->output_offset | |
dc810e39 | 4843 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 4844 | |
dd5724d5 AM |
4845 | /* If this is a static link, or it is a -Bsymbolic link and the |
4846 | symbol is defined locally or was forced to be local because | |
4847 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
4848 | The entry in the global offset table will already have been |
4849 | initialized in the relocate_section function. */ | |
710ab287 | 4850 | if (h->def_regular |
0018b0a3 L |
4851 | && h->type == STT_GNU_IFUNC) |
4852 | { | |
710ab287 L |
4853 | if (info->shared) |
4854 | { | |
4855 | /* Generate R_386_GLOB_DAT. */ | |
4856 | goto do_glob_dat; | |
4857 | } | |
4858 | else | |
4859 | { | |
cd2b2c10 L |
4860 | asection *plt; |
4861 | ||
710ab287 L |
4862 | if (!h->pointer_equality_needed) |
4863 | abort (); | |
4864 | ||
4865 | /* For non-shared object, we can't use .got.plt, which | |
4866 | contains the real function addres if we need pointer | |
4867 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 4868 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4869 | bfd_put_32 (output_bfd, |
4870 | (plt->output_section->vma | |
4871 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 4872 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4873 | return TRUE; |
4874 | } | |
0018b0a3 L |
4875 | } |
4876 | else if (info->shared | |
4877 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
dd5724d5 | 4878 | { |
6725bdbf | 4879 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
4880 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
4881 | } | |
252b5132 RH |
4882 | else |
4883 | { | |
dd5724d5 | 4884 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 4885 | do_glob_dat: |
6725bdbf | 4886 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4887 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
4888 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
4889 | } | |
4890 | ||
59d6ffb2 | 4891 | elf_append_rel (output_bfd, htab->elf.srelgot, &rel); |
252b5132 RH |
4892 | } |
4893 | ||
f5385ebf | 4894 | if (h->needs_copy) |
252b5132 | 4895 | { |
947216bf | 4896 | Elf_Internal_Rela rel; |
252b5132 RH |
4897 | |
4898 | /* This symbol needs a copy reloc. Set it up. */ | |
4899 | ||
ffb2e45b AM |
4900 | if (h->dynindx == -1 |
4901 | || (h->root.type != bfd_link_hash_defined | |
4902 | && h->root.type != bfd_link_hash_defweak) | |
4903 | || htab->srelbss == NULL) | |
4904 | abort (); | |
252b5132 RH |
4905 | |
4906 | rel.r_offset = (h->root.u.def.value | |
4907 | + h->root.u.def.section->output_section->vma | |
4908 | + h->root.u.def.section->output_offset); | |
4909 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
59d6ffb2 | 4910 | elf_append_rel (output_bfd, htab->srelbss, &rel); |
252b5132 RH |
4911 | } |
4912 | ||
b34976b6 | 4913 | return TRUE; |
252b5132 RH |
4914 | } |
4915 | ||
c25bc9fc L |
4916 | /* Finish up local dynamic symbol handling. We set the contents of |
4917 | various dynamic sections here. */ | |
4918 | ||
4919 | static bfd_boolean | |
4920 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
4921 | { | |
4922 | struct elf_link_hash_entry *h | |
4923 | = (struct elf_link_hash_entry *) *slot; | |
4924 | struct bfd_link_info *info | |
23209a78 | 4925 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
4926 | |
4927 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
4928 | h, NULL); | |
4929 | } | |
4930 | ||
38701953 AM |
4931 | /* Used to decide how to sort relocs in an optimal manner for the |
4932 | dynamic linker, before writing them out. */ | |
4933 | ||
4934 | static enum elf_reloc_type_class | |
7e612e98 AM |
4935 | elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
4936 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
4937 | const Elf_Internal_Rela *rela) | |
38701953 | 4938 | { |
55fd94b0 | 4939 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
4940 | { |
4941 | case R_386_RELATIVE: | |
4942 | return reloc_class_relative; | |
4943 | case R_386_JUMP_SLOT: | |
4944 | return reloc_class_plt; | |
4945 | case R_386_COPY: | |
4946 | return reloc_class_copy; | |
4947 | default: | |
4948 | return reloc_class_normal; | |
4949 | } | |
4950 | } | |
4951 | ||
252b5132 RH |
4952 | /* Finish up the dynamic sections. */ |
4953 | ||
b34976b6 | 4954 | static bfd_boolean |
55fd94b0 AM |
4955 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4956 | struct bfd_link_info *info) | |
252b5132 | 4957 | { |
6725bdbf | 4958 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4959 | bfd *dynobj; |
252b5132 | 4960 | asection *sdyn; |
25e762b9 | 4961 | const struct elf_i386_backend_data *abed; |
252b5132 | 4962 | |
6725bdbf | 4963 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4964 | if (htab == NULL) |
4965 | return FALSE; | |
4966 | ||
ebe50bae | 4967 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4968 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 4969 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 4970 | |
ebe50bae | 4971 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4972 | { |
252b5132 RH |
4973 | Elf32_External_Dyn *dyncon, *dynconend; |
4974 | ||
6de2ae4a | 4975 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 4976 | abort (); |
252b5132 RH |
4977 | |
4978 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4979 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4980 | for (; dyncon < dynconend; dyncon++) |
4981 | { | |
4982 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4983 | asection *s; |
252b5132 RH |
4984 | |
4985 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4986 | ||
4987 | switch (dyn.d_tag) | |
4988 | { | |
4989 | default: | |
25e762b9 RM |
4990 | if (abed->is_vxworks |
4991 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 4992 | break; |
0ac8d2ca | 4993 | continue; |
252b5132 RH |
4994 | |
4995 | case DT_PLTGOT: | |
6de2ae4a | 4996 | s = htab->elf.sgotplt; |
8c37241b | 4997 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
4998 | break; |
4999 | ||
252b5132 | 5000 | case DT_JMPREL: |
6de2ae4a | 5001 | s = htab->elf.srelplt; |
6348e046 | 5002 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5003 | break; |
5004 | ||
5005 | case DT_PLTRELSZ: | |
6de2ae4a | 5006 | s = htab->elf.srelplt; |
eea6121a | 5007 | dyn.d_un.d_val = s->size; |
252b5132 RH |
5008 | break; |
5009 | ||
5010 | case DT_RELSZ: | |
5011 | /* My reading of the SVR4 ABI indicates that the | |
5012 | procedure linkage table relocs (DT_JMPREL) should be | |
5013 | included in the overall relocs (DT_REL). This is | |
5014 | what Solaris does. However, UnixWare can not handle | |
5015 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 5016 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 5017 | s = htab->elf.srelplt; |
6348e046 AM |
5018 | if (s == NULL) |
5019 | continue; | |
eea6121a | 5020 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
5021 | break; |
5022 | ||
5023 | case DT_REL: | |
5024 | /* We may not be using the standard ELF linker script. | |
5025 | If .rel.plt is the first .rel section, we adjust | |
5026 | DT_REL to not include it. */ | |
6de2ae4a | 5027 | s = htab->elf.srelplt; |
6348e046 AM |
5028 | if (s == NULL) |
5029 | continue; | |
5030 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
5031 | continue; | |
eea6121a | 5032 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
5033 | break; |
5034 | } | |
0ac8d2ca AM |
5035 | |
5036 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5037 | } |
5038 | ||
5039 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5040 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 RH |
5041 | { |
5042 | if (info->shared) | |
eac338cf | 5043 | { |
25e762b9 RM |
5044 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5045 | abed->plt->plt0_entry_size); | |
5046 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5047 | abed->plt0_pad_byte, | |
5048 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5049 | } |
252b5132 RH |
5050 | else |
5051 | { | |
25e762b9 RM |
5052 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5053 | abed->plt->plt0_entry_size); | |
5054 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5055 | abed->plt0_pad_byte, | |
5056 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5057 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5058 | (htab->elf.sgotplt->output_section->vma |
5059 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5060 | + 4), |
25e762b9 RM |
5061 | htab->elf.splt->contents |
5062 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5063 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5064 | (htab->elf.sgotplt->output_section->vma |
5065 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5066 | + 8), |
25e762b9 RM |
5067 | htab->elf.splt->contents |
5068 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5069 | |
25e762b9 | 5070 | if (abed->is_vxworks) |
eac338cf PB |
5071 | { |
5072 | Elf_Internal_Rela rel; | |
7325306f | 5073 | |
eac338cf PB |
5074 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5075 | On IA32 we use REL relocations so the addend goes in | |
5076 | the PLT directly. */ | |
6de2ae4a L |
5077 | rel.r_offset = (htab->elf.splt->output_section->vma |
5078 | + htab->elf.splt->output_offset | |
25e762b9 | 5079 | + abed->plt->plt0_got1_offset); |
7325306f | 5080 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5081 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5082 | htab->srelplt2->contents); | |
5083 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5084 | rel.r_offset = (htab->elf.splt->output_section->vma |
5085 | + htab->elf.splt->output_offset | |
25e762b9 | 5086 | + abed->plt->plt0_got2_offset); |
7325306f | 5087 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5088 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5089 | htab->srelplt2->contents + | |
5090 | sizeof (Elf32_External_Rel)); | |
5091 | } | |
252b5132 RH |
5092 | } |
5093 | ||
5094 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5095 | really seem like the right value. */ | |
6de2ae4a | 5096 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5097 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5098 | |
5099 | /* Correct the .rel.plt.unloaded relocations. */ | |
25e762b9 | 5100 | if (abed->is_vxworks && !info->shared) |
eac338cf | 5101 | { |
25e762b9 RM |
5102 | int num_plts = (htab->elf.splt->size |
5103 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5104 | unsigned char *p; |
eac338cf PB |
5105 | |
5106 | p = htab->srelplt2->contents; | |
5107 | if (info->shared) | |
5108 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
5109 | else | |
5110 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5111 | ||
5112 | for (; num_plts; num_plts--) | |
5113 | { | |
5114 | Elf_Internal_Rela rel; | |
5115 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5116 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5117 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5118 | p += sizeof (Elf32_External_Rel); | |
5119 | ||
5120 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5121 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5122 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5123 | p += sizeof (Elf32_External_Rel); | |
5124 | } | |
5125 | } | |
252b5132 RH |
5126 | } |
5127 | } | |
5128 | ||
6de2ae4a | 5129 | if (htab->elf.sgotplt) |
252b5132 | 5130 | { |
56d4289c L |
5131 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5132 | { | |
5133 | (*_bfd_error_handler) | |
5134 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5135 | return FALSE; | |
5136 | } | |
5137 | ||
12d0ee4a | 5138 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5139 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5140 | { |
5141 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5142 | (sdyn == NULL ? 0 |
12d0ee4a | 5143 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5144 | htab->elf.sgotplt->contents); |
5145 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5146 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5147 | } |
252b5132 | 5148 | |
6de2ae4a | 5149 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5150 | } |
8c37241b | 5151 | |
e41b3a13 | 5152 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5153 | if (htab->plt_eh_frame != NULL |
5154 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5155 | { |
5156 | if (htab->elf.splt != NULL | |
5157 | && htab->elf.splt->size != 0 | |
5158 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5159 | && htab->elf.splt->output_section != NULL | |
5160 | && htab->plt_eh_frame->output_section != NULL) | |
5161 | { | |
5162 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5163 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5164 | + htab->plt_eh_frame->output_offset | |
5165 | + PLT_FDE_START_OFFSET; | |
5166 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5167 | htab->plt_eh_frame->contents | |
5168 | + PLT_FDE_START_OFFSET); | |
5169 | } | |
5170 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5171 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5172 | { |
5173 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5174 | htab->plt_eh_frame, | |
5175 | htab->plt_eh_frame->contents)) | |
5176 | return FALSE; | |
5177 | } | |
5178 | } | |
5179 | ||
6de2ae4a L |
5180 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5181 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5182 | |
c25bc9fc L |
5183 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5184 | htab_traverse (htab->loc_hash_table, | |
5185 | elf_i386_finish_local_dynamic_symbol, | |
5186 | info); | |
5187 | ||
b34976b6 | 5188 | return TRUE; |
252b5132 RH |
5189 | } |
5190 | ||
3972882e | 5191 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5192 | |
3972882e L |
5193 | static bfd_vma * |
5194 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5195 | asection *relplt) | |
4c45e5c9 | 5196 | { |
3972882e L |
5197 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5198 | arelent *p; | |
5199 | long count, i; | |
5200 | bfd_vma *plt_sym_val; | |
144bed8d | 5201 | bfd_vma plt_offset; |
3972882e L |
5202 | bfd_byte *plt_contents; |
5203 | const struct elf_i386_backend_data *bed | |
5204 | = get_elf_i386_backend_data (abfd); | |
5205 | Elf_Internal_Shdr *hdr; | |
5206 | ||
5207 | /* Get the .plt section contents. */ | |
5208 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5209 | if (plt_contents == NULL) | |
5210 | return NULL; | |
5211 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5212 | plt_contents, 0, plt->size)) | |
5213 | { | |
5214 | bad_return: | |
5215 | free (plt_contents); | |
5216 | return NULL; | |
5217 | } | |
144bed8d | 5218 | |
3972882e L |
5219 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5220 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5221 | goto bad_return; | |
144bed8d | 5222 | |
3972882e L |
5223 | hdr = &elf_section_data (relplt)->this_hdr; |
5224 | count = relplt->size / hdr->sh_entsize; | |
5225 | ||
5226 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
5227 | if (plt_sym_val == NULL) | |
5228 | goto bad_return; | |
cca5b8b6 | 5229 | |
35181b3e | 5230 | for (i = 0; i < count; i++) |
3972882e | 5231 | plt_sym_val[i] = -1; |
cca5b8b6 | 5232 | |
3972882e L |
5233 | plt_offset = bed->plt->plt_entry_size; |
5234 | p = relplt->relocation; | |
5235 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5236 | { |
3972882e L |
5237 | long reloc_index; |
5238 | ||
6f25f223 | 5239 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 5240 | if (p->howto == NULL) |
6f25f223 | 5241 | continue; |
533d0af0 L |
5242 | |
5243 | if (p->howto->type != R_386_JUMP_SLOT | |
5244 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
5245 | continue; |
5246 | ||
5247 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
5248 | + bed->plt->plt_reloc_offset)); | |
5249 | reloc_index /= sizeof (Elf32_External_Rel); | |
5250 | if (reloc_index >= count) | |
5251 | abort (); | |
5252 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
5253 | plt_offset += bed->plt->plt_entry_size; |
5254 | } | |
5255 | ||
3972882e L |
5256 | free (plt_contents); |
5257 | ||
5258 | return plt_sym_val; | |
5259 | } | |
5260 | ||
5261 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
5262 | ||
5263 | static long | |
5264 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
5265 | long symcount, | |
5266 | asymbol **syms, | |
5267 | long dynsymcount, | |
5268 | asymbol **dynsyms, | |
5269 | asymbol **ret) | |
5270 | { | |
5271 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
5272 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
5273 | dynsymcount, dynsyms, ret, | |
5274 | plt, | |
5275 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
5276 | } |
5277 | ||
fdc90cb4 JJ |
5278 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5279 | ||
5280 | static bfd_boolean | |
5281 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
5282 | { | |
5283 | if (h->plt.offset != (bfd_vma) -1 | |
5284 | && !h->def_regular | |
5285 | && !h->pointer_equality_needed) | |
5286 | return FALSE; | |
5287 | ||
5288 | return _bfd_elf_hash_symbol (h); | |
5289 | } | |
4c45e5c9 | 5290 | |
d8045f23 NC |
5291 | /* Hook called by the linker routine which adds symbols from an object |
5292 | file. */ | |
5293 | ||
5294 | static bfd_boolean | |
c16153ae | 5295 | elf_i386_add_symbol_hook (bfd * abfd, |
f1885d1e | 5296 | struct bfd_link_info * info, |
d8045f23 NC |
5297 | Elf_Internal_Sym * sym, |
5298 | const char ** namep ATTRIBUTE_UNUSED, | |
5299 | flagword * flagsp ATTRIBUTE_UNUSED, | |
5300 | asection ** secp ATTRIBUTE_UNUSED, | |
5301 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
5302 | { | |
f1885d1e AM |
5303 | if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
5304 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) | |
5305 | && (abfd->flags & DYNAMIC) == 0 | |
5306 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
f64b2e8d | 5307 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
d8045f23 NC |
5308 | |
5309 | return TRUE; | |
5310 | } | |
5311 | ||
6d00b590 | 5312 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
5313 | #define TARGET_LITTLE_NAME "elf32-i386" |
5314 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5315 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5316 | #define ELF_MACHINE_CODE EM_386 |
5317 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5318 | |
5319 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5320 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5321 | #define elf_backend_want_got_plt 1 |
5322 | #define elf_backend_plt_readonly 1 | |
5323 | #define elf_backend_want_plt_sym 0 | |
5324 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5325 | #define elf_backend_plt_alignment 4 |
f7483970 | 5326 | #define elf_backend_extern_protected_data 1 |
252b5132 | 5327 | |
8c29f035 AM |
5328 | /* Support RELA for objdump of prelink objects. */ |
5329 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5330 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5331 | ||
13ae64f3 | 5332 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5333 | |
dd5724d5 AM |
5334 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
5335 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
5336 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 5337 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 5338 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
5339 | |
5340 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5341 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5342 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 5343 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 5344 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 5345 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5346 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5347 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
5348 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
5349 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
5350 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5351 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5352 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5353 | #define elf_backend_relocate_section elf_i386_relocate_section |
5354 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 5355 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
5356 | #define elf_backend_omit_section_dynsym \ |
5357 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 5358 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 | 5359 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
dd5724d5 | 5360 | |
252b5132 | 5361 | #include "elf32-target.h" |
2bc3c89a AM |
5362 | |
5363 | /* FreeBSD support. */ | |
5364 | ||
5365 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5366 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
5367 | #undef TARGET_LITTLE_NAME |
5368 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
5369 | #undef ELF_OSABI |
5370 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
5371 | |
5372 | /* The kernel recognizes executables as valid only if they carry a | |
5373 | "FreeBSD" label in the ELF header. So we put this label on all | |
5374 | executables and (for simplicity) also all other object files. */ | |
5375 | ||
2bc3c89a | 5376 | static void |
d8045f23 | 5377 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 5378 | { |
78245035 | 5379 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 5380 | |
2bc3c89a | 5381 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
5382 | { |
5383 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5384 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
5385 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
5386 | } | |
caf47ea6 | 5387 | #endif |
2bc3c89a AM |
5388 | } |
5389 | ||
5390 | #undef elf_backend_post_process_headers | |
d8045f23 | 5391 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
5392 | #undef elf32_bed |
5393 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 5394 | |
d8045f23 NC |
5395 | #undef elf_backend_add_symbol_hook |
5396 | ||
2bc3c89a | 5397 | #include "elf32-target.h" |
eac338cf | 5398 | |
a6cc6b3b RO |
5399 | /* Solaris 2. */ |
5400 | ||
5401 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5402 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
5403 | #undef TARGET_LITTLE_NAME |
5404 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
5405 | ||
914082d1 L |
5406 | #undef elf_backend_post_process_headers |
5407 | ||
a6cc6b3b RO |
5408 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
5409 | objects won't be recognized. */ | |
5410 | #undef ELF_OSABI | |
5411 | ||
5412 | #undef elf32_bed | |
5413 | #define elf32_bed elf32_i386_sol2_bed | |
5414 | ||
7dc98aea RO |
5415 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
5416 | boundary. */ | |
5417 | #undef elf_backend_static_tls_alignment | |
5418 | #define elf_backend_static_tls_alignment 8 | |
5419 | ||
a6cc6b3b RO |
5420 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5421 | ||
5422 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5423 | File, p.63. */ | |
5424 | #undef elf_backend_want_plt_sym | |
5425 | #define elf_backend_want_plt_sym 1 | |
5426 | ||
5427 | #include "elf32-target.h" | |
5428 | ||
a27e4371 RM |
5429 | /* Native Client support. */ |
5430 | ||
5431 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5432 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
5433 | #undef TARGET_LITTLE_NAME |
5434 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
5435 | #undef elf32_bed | |
5436 | #define elf32_bed elf32_i386_nacl_bed | |
5437 | ||
5438 | #undef ELF_MAXPAGESIZE | |
5439 | #define ELF_MAXPAGESIZE 0x10000 | |
5440 | ||
5441 | /* Restore defaults. */ | |
5442 | #undef ELF_OSABI | |
5443 | #undef elf_backend_want_plt_sym | |
5444 | #define elf_backend_want_plt_sym 0 | |
5445 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
5446 | #undef elf_backend_static_tls_alignment |
5447 | ||
5448 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5449 | ||
5450 | #undef elf_backend_plt_alignment | |
5451 | #define elf_backend_plt_alignment 5 | |
5452 | #define NACL_PLT_ENTRY_SIZE 64 | |
5453 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5454 | ||
5455 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
5456 | { | |
5457 | 0xff, 0x35, /* pushl contents of address */ | |
5458 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
5459 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5460 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
5461 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5462 | 0xff, 0xe1 /* jmp *%ecx */ | |
5463 | }; | |
5464 | ||
5465 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5466 | { | |
5467 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5468 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
5469 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5470 | 0xff, 0xe1, /* jmp *%ecx */ | |
5471 | ||
5472 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5473 | 0x90, | |
5474 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5475 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5476 | ||
5477 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5478 | 0x68, /* pushl immediate */ | |
5479 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
5480 | 0xe9, /* jmp relative */ | |
5481 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
5482 | ||
5483 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5484 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5485 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5486 | 0x90, 0x90 | |
5487 | }; | |
5488 | ||
5489 | static const bfd_byte | |
5490 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
5491 | { | |
5492 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
5493 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
5494 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
5495 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
5496 | |
5497 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
5498 | so pad to that size with nop instructions. */ | |
5499 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
5500 | }; |
5501 | ||
5502 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5503 | { | |
5504 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
5505 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
5506 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
5507 | 0xff, 0xe1, /* jmp *%ecx */ | |
5508 | ||
5509 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5510 | 0x90, | |
5511 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5512 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5513 | ||
5514 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5515 | 0x68, /* pushl immediate */ | |
5516 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
5517 | 0xe9, /* jmp relative */ | |
5518 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
5519 | ||
5520 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5521 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5522 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5523 | 0x90, 0x90 | |
5524 | }; | |
5525 | ||
5526 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
5527 | { | |
5528 | #if (PLT_CIE_LENGTH != 20 \ | |
5529 | || PLT_FDE_LENGTH != 36 \ | |
5530 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5531 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5532 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
5533 | #endif | |
5534 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5535 | 0, 0, 0, 0, /* CIE ID */ | |
5536 | 1, /* CIE version */ | |
5537 | 'z', 'R', 0, /* Augmentation string */ | |
5538 | 1, /* Code alignment factor */ | |
5539 | 0x7c, /* Data alignment factor: -4 */ | |
5540 | 8, /* Return address column */ | |
5541 | 1, /* Augmentation size */ | |
5542 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5543 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
5544 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
5545 | DW_CFA_nop, DW_CFA_nop, | |
5546 | ||
5547 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5548 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
5549 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
5550 | 0, 0, 0, 0, /* .plt size goes here */ | |
5551 | 0, /* Augmentation size */ | |
5552 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
5553 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5554 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
5555 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5556 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5557 | 13, /* Block length */ | |
5558 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
5559 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
5560 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5561 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
5562 | DW_CFA_nop, DW_CFA_nop | |
5563 | }; | |
5564 | ||
5565 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
5566 | { | |
5567 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
5568 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
5569 | 2, /* plt0_got1_offset */ | |
5570 | 8, /* plt0_got2_offset */ | |
5571 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
5572 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5573 | 2, /* plt_got_offset */ | |
5574 | 33, /* plt_reloc_offset */ | |
5575 | 38, /* plt_plt_offset */ | |
5576 | 32, /* plt_lazy_offset */ | |
5577 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
5578 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
5579 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5580 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
5581 | }; | |
5582 | ||
5583 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
5584 | { | |
5585 | &elf_i386_nacl_plt, /* plt */ | |
5586 | 0x90, /* plt0_pad_byte: nop insn */ | |
5587 | 0, /* is_vxworks */ | |
5588 | }; | |
5589 | ||
64b384e1 RM |
5590 | static bfd_boolean |
5591 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
5592 | { | |
5593 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
5594 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
5595 | return TRUE; | |
5596 | } | |
5597 | ||
a27e4371 RM |
5598 | #undef elf_backend_arch_data |
5599 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
5600 | ||
64b384e1 RM |
5601 | #undef elf_backend_object_p |
5602 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
5603 | #undef elf_backend_modify_segment_map |
5604 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5605 | #undef elf_backend_modify_program_headers | |
5606 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5607 | #undef elf_backend_final_write_processing |
5608 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5609 | |
a27e4371 RM |
5610 | #include "elf32-target.h" |
5611 | ||
5a68afcf | 5612 | /* Restore defaults. */ |
64b384e1 | 5613 | #undef elf_backend_object_p |
5a68afcf RM |
5614 | #undef elf_backend_modify_segment_map |
5615 | #undef elf_backend_modify_program_headers | |
887badb3 | 5616 | #undef elf_backend_final_write_processing |
5a68afcf | 5617 | |
eac338cf PB |
5618 | /* VxWorks support. */ |
5619 | ||
5620 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5621 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
5622 | #undef TARGET_LITTLE_NAME |
5623 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 5624 | #undef ELF_OSABI |
a27e4371 RM |
5625 | #undef elf_backend_plt_alignment |
5626 | #define elf_backend_plt_alignment 4 | |
eac338cf | 5627 | |
23209a78 RM |
5628 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
5629 | { | |
25e762b9 | 5630 | &elf_i386_plt, /* plt */ |
23209a78 RM |
5631 | 0x90, /* plt0_pad_byte */ |
5632 | 1, /* is_vxworks */ | |
5633 | }; | |
eac338cf | 5634 | |
23209a78 RM |
5635 | #undef elf_backend_arch_data |
5636 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 5637 | |
13285a1b | 5638 | #undef elf_backend_relocs_compatible |
eac338cf PB |
5639 | #undef elf_backend_add_symbol_hook |
5640 | #define elf_backend_add_symbol_hook \ | |
5641 | elf_vxworks_add_symbol_hook | |
5642 | #undef elf_backend_link_output_symbol_hook | |
5643 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 5644 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
5645 | #undef elf_backend_emit_relocs |
5646 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
5647 | #undef elf_backend_final_write_processing | |
5648 | #define elf_backend_final_write_processing \ | |
5649 | elf_vxworks_final_write_processing | |
7dc98aea | 5650 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
5651 | |
5652 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
5653 | define it. */ | |
5654 | #undef elf_backend_want_plt_sym | |
5655 | #define elf_backend_want_plt_sym 1 | |
5656 | ||
5657 | #undef elf32_bed | |
5658 | #define elf32_bed elf32_i386_vxworks_bed | |
5659 | ||
5660 | #include "elf32-target.h" |