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 | |
dd7e64d4 L |
759 | /* Information about the GOT PLT entry. Filled when there are both |
760 | GOT and PLT relocations against the same function. */ | |
761 | union gotplt_union plt_got; | |
762 | ||
67a4f2b7 AO |
763 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
764 | starting at the end of the jump table. */ | |
765 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
766 | }; |
767 | ||
768 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
769 | ||
770 | struct elf_i386_obj_tdata | |
771 | { | |
772 | struct elf_obj_tdata root; | |
773 | ||
774 | /* tls_type for each local got entry. */ | |
775 | char *local_got_tls_type; | |
67a4f2b7 AO |
776 | |
777 | /* GOTPLT entries for TLS descriptors. */ | |
778 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
779 | }; |
780 | ||
13ae64f3 JJ |
781 | #define elf_i386_tdata(abfd) \ |
782 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
783 | ||
784 | #define elf_i386_local_got_tls_type(abfd) \ | |
785 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
786 | ||
67a4f2b7 AO |
787 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
788 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
789 | ||
0ffa91dd NC |
790 | #define is_i386_elf(bfd) \ |
791 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
792 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 793 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 794 | |
b34976b6 | 795 | static bfd_boolean |
55fd94b0 | 796 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 797 | { |
0ffa91dd | 798 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 799 | I386_ELF_DATA); |
13ae64f3 | 800 | } |
cedb70c5 | 801 | |
252b5132 RH |
802 | /* i386 ELF linker hash table. */ |
803 | ||
804 | struct elf_i386_link_hash_table | |
805 | { | |
ebe50bae | 806 | struct elf_link_hash_table elf; |
252b5132 | 807 | |
6725bdbf | 808 | /* Short-cuts to get to dynamic linker sections. */ |
6725bdbf AM |
809 | asection *sdynbss; |
810 | asection *srelbss; | |
e41b3a13 | 811 | asection *plt_eh_frame; |
dd7e64d4 | 812 | asection *plt_got; |
9635fe29 | 813 | |
4dfe6ac6 NC |
814 | union |
815 | { | |
13ae64f3 JJ |
816 | bfd_signed_vma refcount; |
817 | bfd_vma offset; | |
818 | } tls_ldm_got; | |
819 | ||
67a4f2b7 AO |
820 | /* The amount of space used by the reserved portion of the sgotplt |
821 | section, plus whatever space is used by the jump slots. */ | |
822 | bfd_vma sgotplt_jump_table_size; | |
823 | ||
87d72d41 AM |
824 | /* Small local sym cache. */ |
825 | struct sym_cache sym_cache; | |
9f03412a AO |
826 | |
827 | /* _TLS_MODULE_BASE_ symbol. */ | |
828 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
829 | |
830 | /* Used by local STT_GNU_IFUNC symbols. */ | |
831 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
832 | void * loc_hash_memory; |
833 | ||
834 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
835 | asection *srelplt2; | |
836 | ||
4dfe6ac6 NC |
837 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
838 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
839 | |
840 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
841 | bfd_vma next_jump_slot_index; | |
842 | ||
843 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
844 | bfd_vma next_irelative_index; | |
6725bdbf | 845 | }; |
252b5132 RH |
846 | |
847 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
848 | ||
849 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
850 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
851 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 852 | |
67a4f2b7 | 853 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 854 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 855 | |
252b5132 RH |
856 | /* Create an entry in an i386 ELF linker hash table. */ |
857 | ||
858 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
859 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
860 | struct bfd_hash_table *table, | |
861 | const char *string) | |
252b5132 | 862 | { |
252b5132 RH |
863 | /* Allocate the structure if it has not already been allocated by a |
864 | subclass. */ | |
ebe50bae AM |
865 | if (entry == NULL) |
866 | { | |
a50b1753 NC |
867 | entry = (struct bfd_hash_entry *) |
868 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
869 | if (entry == NULL) |
870 | return entry; | |
871 | } | |
252b5132 RH |
872 | |
873 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
874 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
875 | if (entry != NULL) | |
252b5132 | 876 | { |
ebe50bae AM |
877 | struct elf_i386_link_hash_entry *eh; |
878 | ||
879 | eh = (struct elf_i386_link_hash_entry *) entry; | |
880 | eh->dyn_relocs = NULL; | |
13ae64f3 | 881 | eh->tls_type = GOT_UNKNOWN; |
dd7e64d4 | 882 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 883 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
884 | } |
885 | ||
ebe50bae | 886 | return entry; |
252b5132 RH |
887 | } |
888 | ||
c25bc9fc L |
889 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
890 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
891 | as global symbol. We reuse indx and dynstr_index for local symbol | |
892 | hash since they aren't used by global symbols in this backend. */ | |
893 | ||
894 | static hashval_t | |
895 | elf_i386_local_htab_hash (const void *ptr) | |
896 | { | |
897 | struct elf_link_hash_entry *h | |
898 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 899 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
900 | } |
901 | ||
902 | /* Compare local hash entries. */ | |
903 | ||
904 | static int | |
905 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
906 | { | |
907 | struct elf_link_hash_entry *h1 | |
908 | = (struct elf_link_hash_entry *) ptr1; | |
909 | struct elf_link_hash_entry *h2 | |
910 | = (struct elf_link_hash_entry *) ptr2; | |
911 | ||
912 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
913 | } | |
914 | ||
915 | /* Find and/or create a hash entry for local symbol. */ | |
916 | ||
917 | static struct elf_link_hash_entry * | |
918 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
919 | bfd *abfd, const Elf_Internal_Rela *rel, | |
920 | bfd_boolean create) | |
921 | { | |
922 | struct elf_i386_link_hash_entry e, *ret; | |
923 | asection *sec = abfd->sections; | |
d2149d72 L |
924 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
925 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
926 | void **slot; |
927 | ||
928 | e.elf.indx = sec->id; | |
929 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
930 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
931 | create ? INSERT : NO_INSERT); | |
932 | ||
933 | if (!slot) | |
934 | return NULL; | |
935 | ||
936 | if (*slot) | |
937 | { | |
938 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
939 | return &ret->elf; | |
940 | } | |
941 | ||
942 | ret = (struct elf_i386_link_hash_entry *) | |
943 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
944 | sizeof (struct elf_i386_link_hash_entry)); | |
945 | if (ret) | |
946 | { | |
947 | memset (ret, 0, sizeof (*ret)); | |
948 | ret->elf.indx = sec->id; | |
949 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
950 | ret->elf.dynindx = -1; | |
dd7e64d4 | 951 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
952 | *slot = ret; |
953 | } | |
954 | return &ret->elf; | |
955 | } | |
956 | ||
68faa637 AM |
957 | /* Destroy an i386 ELF linker hash table. */ |
958 | ||
959 | static void | |
d495ab0d | 960 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
961 | { |
962 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 963 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
964 | |
965 | if (htab->loc_hash_table) | |
966 | htab_delete (htab->loc_hash_table); | |
967 | if (htab->loc_hash_memory) | |
968 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 969 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
970 | } |
971 | ||
252b5132 RH |
972 | /* Create an i386 ELF linker hash table. */ |
973 | ||
974 | static struct bfd_link_hash_table * | |
55fd94b0 | 975 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
976 | { |
977 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 978 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 979 | |
7bf52ea2 | 980 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 981 | if (ret == NULL) |
252b5132 RH |
982 | return NULL; |
983 | ||
eb4ff4d6 L |
984 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
985 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
986 | sizeof (struct elf_i386_link_hash_entry), |
987 | I386_ELF_DATA)) | |
252b5132 | 988 | { |
e2d34d7d | 989 | free (ret); |
252b5132 RH |
990 | return NULL; |
991 | } | |
992 | ||
c25bc9fc L |
993 | ret->loc_hash_table = htab_try_create (1024, |
994 | elf_i386_local_htab_hash, | |
995 | elf_i386_local_htab_eq, | |
996 | NULL); | |
997 | ret->loc_hash_memory = objalloc_create (); | |
998 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
999 | { | |
d495ab0d | 1000 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1001 | return NULL; |
1002 | } | |
d495ab0d | 1003 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1004 | |
ebe50bae | 1005 | return &ret->elf.root; |
252b5132 RH |
1006 | } |
1007 | ||
6725bdbf AM |
1008 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
1009 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1010 | hash table. */ | |
1011 | ||
b34976b6 | 1012 | static bfd_boolean |
55fd94b0 | 1013 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
1014 | { |
1015 | struct elf_i386_link_hash_table *htab; | |
1016 | ||
6725bdbf | 1017 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 1018 | return FALSE; |
6725bdbf | 1019 | |
6de2ae4a | 1020 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1021 | if (htab == NULL) |
1022 | return FALSE; | |
1023 | ||
3d4d4302 | 1024 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
6725bdbf | 1025 | if (!info->shared) |
3d4d4302 | 1026 | htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss"); |
6725bdbf | 1027 | |
6de2ae4a | 1028 | if (!htab->sdynbss |
6725bdbf AM |
1029 | || (!info->shared && !htab->srelbss)) |
1030 | abort (); | |
1031 | ||
23209a78 | 1032 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1033 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1034 | &htab->srelplt2)) | |
711de32c | 1035 | return FALSE; |
eac338cf | 1036 | |
e41b3a13 | 1037 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1038 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1039 | && htab->elf.splt != NULL) |
e41b3a13 | 1040 | { |
bbf96e4e L |
1041 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1042 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1043 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1044 | htab->plt_eh_frame |
bbf96e4e | 1045 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1046 | if (htab->plt_eh_frame == NULL |
1047 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1048 | return FALSE; | |
e41b3a13 JJ |
1049 | } |
1050 | ||
b34976b6 | 1051 | return TRUE; |
6725bdbf AM |
1052 | } |
1053 | ||
ebe50bae AM |
1054 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1055 | ||
51b64d56 | 1056 | static void |
fcfa13d2 | 1057 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1058 | struct elf_link_hash_entry *dir, |
1059 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1060 | { |
1061 | struct elf_i386_link_hash_entry *edir, *eind; | |
1062 | ||
1063 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1064 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1065 | ||
bbd7ec4a | 1066 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1067 | { |
bbd7ec4a AM |
1068 | if (edir->dyn_relocs != NULL) |
1069 | { | |
e03a8ed8 L |
1070 | struct elf_dyn_relocs **pp; |
1071 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1072 | |
fcfa13d2 | 1073 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1074 | list. Merge any entries against the same section. */ |
1075 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1076 | { | |
e03a8ed8 | 1077 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1078 | |
1079 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1080 | if (q->sec == p->sec) | |
1081 | { | |
1082 | q->pc_count += p->pc_count; | |
1083 | q->count += p->count; | |
1084 | *pp = p->next; | |
1085 | break; | |
1086 | } | |
1087 | if (q == NULL) | |
1088 | pp = &p->next; | |
1089 | } | |
1090 | *pp = edir->dyn_relocs; | |
1091 | } | |
1092 | ||
ebe50bae AM |
1093 | edir->dyn_relocs = eind->dyn_relocs; |
1094 | eind->dyn_relocs = NULL; | |
1095 | } | |
ebe50bae | 1096 | |
cd67d266 JJ |
1097 | if (ind->root.type == bfd_link_hash_indirect |
1098 | && dir->got.refcount <= 0) | |
1099 | { | |
1100 | edir->tls_type = eind->tls_type; | |
1101 | eind->tls_type = GOT_UNKNOWN; | |
1102 | } | |
81848ca0 AM |
1103 | |
1104 | if (ELIMINATE_COPY_RELOCS | |
1105 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1106 | && dir->dynamic_adjusted) |
1107 | { | |
1108 | /* If called to transfer flags for a weakdef during processing | |
1109 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1110 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1111 | dir->ref_dynamic |= ind->ref_dynamic; | |
1112 | dir->ref_regular |= ind->ref_regular; | |
1113 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1114 | dir->needs_plt |= ind->needs_plt; | |
1115 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1116 | } | |
81848ca0 | 1117 | else |
fcfa13d2 | 1118 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
ebe50bae AM |
1119 | } |
1120 | ||
142411ca L |
1121 | /* Return TRUE if the TLS access code sequence support transition |
1122 | from R_TYPE. */ | |
1123 | ||
1124 | static bfd_boolean | |
1125 | elf_i386_check_tls_transition (bfd *abfd, asection *sec, | |
1126 | bfd_byte *contents, | |
1127 | Elf_Internal_Shdr *symtab_hdr, | |
1128 | struct elf_link_hash_entry **sym_hashes, | |
1129 | unsigned int r_type, | |
1130 | const Elf_Internal_Rela *rel, | |
1131 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1132 | { |
142411ca L |
1133 | unsigned int val, type; |
1134 | unsigned long r_symndx; | |
1135 | struct elf_link_hash_entry *h; | |
1136 | bfd_vma offset; | |
1137 | ||
1138 | /* Get the section contents. */ | |
1139 | if (contents == NULL) | |
1140 | { | |
1141 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1142 | contents = elf_section_data (sec)->this_hdr.contents; | |
1143 | else | |
1144 | { | |
1145 | /* FIXME: How to better handle error condition? */ | |
1146 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1147 | return FALSE; | |
13ae64f3 | 1148 | |
142411ca L |
1149 | /* Cache the section contents for elf_link_input_bfd. */ |
1150 | elf_section_data (sec)->this_hdr.contents = contents; | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | offset = rel->r_offset; | |
13ae64f3 | 1155 | switch (r_type) |
142411ca L |
1156 | { |
1157 | case R_386_TLS_GD: | |
1158 | case R_386_TLS_LDM: | |
1159 | if (offset < 2 || (rel + 1) >= relend) | |
1160 | return FALSE; | |
1161 | ||
1162 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1163 | if (r_type == R_386_TLS_GD) | |
1164 | { | |
09e8c3bf | 1165 | /* Check transition from GD access model. Only |
142411ca L |
1166 | leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr |
1167 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop | |
1168 | can transit to different access model. */ | |
1169 | if ((offset + 10) > sec->size || | |
1170 | (type != 0x8d && type != 0x04)) | |
1171 | return FALSE; | |
1172 | ||
1173 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1174 | if (type == 0x04) | |
1175 | { | |
1176 | /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */ | |
1177 | if (offset < 3) | |
1178 | return FALSE; | |
1179 | ||
1180 | if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d) | |
1181 | return FALSE; | |
1182 | ||
1183 | if ((val & 0xc7) != 0x05 || val == (4 << 3)) | |
1184 | return FALSE; | |
1185 | } | |
1186 | else | |
1187 | { | |
1188 | /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */ | |
1189 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1190 | return FALSE; | |
1191 | ||
1192 | if (bfd_get_8 (abfd, contents + offset + 9) != 0x90) | |
1193 | return FALSE; | |
1194 | } | |
1195 | } | |
1196 | else | |
1197 | { | |
1198 | /* Check transition from LD access model. Only | |
1199 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr | |
1200 | can transit to different access model. */ | |
1201 | if (type != 0x8d || (offset + 9) > sec->size) | |
1202 | return FALSE; | |
1203 | ||
1204 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1205 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1206 | return FALSE; | |
1207 | } | |
1208 | ||
1209 | if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8) | |
1210 | return FALSE; | |
1211 | ||
1212 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1213 | if (r_symndx < symtab_hdr->sh_info) | |
1214 | return FALSE; | |
1215 | ||
1216 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
1217 | /* Use strncmp to check ___tls_get_addr since ___tls_get_addr |
1218 | may be versioned. */ | |
142411ca L |
1219 | return (h != NULL |
1220 | && h->root.root.string != NULL | |
1221 | && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1222 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32) | |
c4fb387b L |
1223 | && (strncmp (h->root.root.string, "___tls_get_addr", |
1224 | 15) == 0)); | |
142411ca L |
1225 | |
1226 | case R_386_TLS_IE: | |
1227 | /* Check transition from IE access model: | |
1228 | movl foo@indntpoff(%rip), %eax | |
1229 | movl foo@indntpoff(%rip), %reg | |
1230 | addl foo@indntpoff(%rip), %reg | |
1231 | */ | |
1232 | ||
1233 | if (offset < 1 || (offset + 4) > sec->size) | |
1234 | return FALSE; | |
1235 | ||
1236 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1237 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1238 | if (val == 0xa1) | |
1239 | return TRUE; | |
1240 | ||
1241 | if (offset < 2) | |
1242 | return FALSE; | |
1243 | ||
1244 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1245 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1246 | return ((type == 0x8b || type == 0x03) | |
1247 | && (val & 0xc7) == 0x05); | |
1248 | ||
1249 | case R_386_TLS_GOTIE: | |
1250 | case R_386_TLS_IE_32: | |
1251 | /* Check transition from {IE_32,GOTIE} access model: | |
1252 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1253 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1254 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1255 | */ | |
1256 | ||
1257 | if (offset < 2 || (offset + 4) > sec->size) | |
1258 | return FALSE; | |
1259 | ||
1260 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1261 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1262 | return FALSE; | |
1263 | ||
1264 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1265 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1266 | ||
1267 | case R_386_TLS_GOTDESC: | |
1268 | /* Check transition from GDesc access model: | |
1269 | leal x@tlsdesc(%ebx), %eax | |
1270 | ||
1271 | Make sure it's a leal adding ebx to a 32-bit offset | |
1272 | into any register, although it's probably almost always | |
1273 | going to be eax. */ | |
1274 | ||
1275 | if (offset < 2 || (offset + 4) > sec->size) | |
1276 | return FALSE; | |
1277 | ||
1278 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1279 | return FALSE; | |
1280 | ||
1281 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1282 | return (val & 0xc7) == 0x83; | |
1283 | ||
1284 | case R_386_TLS_DESC_CALL: | |
1285 | /* Check transition from GDesc access model: | |
1286 | call *x@tlsdesc(%rax) | |
1287 | */ | |
1288 | if (offset + 2 <= sec->size) | |
1289 | { | |
1290 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1291 | static const unsigned char call[] = { 0xff, 0x10 }; |
1292 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1293 | } |
1294 | ||
1295 | return FALSE; | |
1296 | ||
1297 | default: | |
1298 | abort (); | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | /* Return TRUE if the TLS access transition is OK or no transition | |
1303 | will be performed. Update R_TYPE if there is a transition. */ | |
1304 | ||
1305 | static bfd_boolean | |
1306 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1307 | asection *sec, bfd_byte *contents, | |
1308 | Elf_Internal_Shdr *symtab_hdr, | |
1309 | struct elf_link_hash_entry **sym_hashes, | |
1310 | unsigned int *r_type, int tls_type, | |
1311 | const Elf_Internal_Rela *rel, | |
1312 | const Elf_Internal_Rela *relend, | |
4c544807 L |
1313 | struct elf_link_hash_entry *h, |
1314 | unsigned long r_symndx) | |
142411ca L |
1315 | { |
1316 | unsigned int from_type = *r_type; | |
1317 | unsigned int to_type = from_type; | |
1318 | bfd_boolean check = TRUE; | |
1319 | ||
bb1cb422 L |
1320 | /* Skip TLS transition for functions. */ |
1321 | if (h != NULL | |
1322 | && (h->type == STT_FUNC | |
1323 | || h->type == STT_GNU_IFUNC)) | |
1324 | return TRUE; | |
1325 | ||
142411ca | 1326 | switch (from_type) |
13ae64f3 JJ |
1327 | { |
1328 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1329 | case R_386_TLS_GOTDESC: |
1330 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1331 | case R_386_TLS_IE_32: |
37e55690 JJ |
1332 | case R_386_TLS_IE: |
1333 | case R_386_TLS_GOTIE: | |
1d85728f | 1334 | if (info->executable) |
142411ca L |
1335 | { |
1336 | if (h == NULL) | |
1337 | to_type = R_386_TLS_LE_32; | |
1338 | else if (from_type != R_386_TLS_IE | |
1339 | && from_type != R_386_TLS_GOTIE) | |
1340 | to_type = R_386_TLS_IE_32; | |
1341 | } | |
1342 | ||
1343 | /* When we are called from elf_i386_relocate_section, CONTENTS | |
1344 | isn't NULL and there may be additional transitions based on | |
1345 | TLS_TYPE. */ | |
1346 | if (contents != NULL) | |
1347 | { | |
1348 | unsigned int new_to_type = to_type; | |
1349 | ||
1d85728f | 1350 | if (info->executable |
142411ca L |
1351 | && h != NULL |
1352 | && h->dynindx == -1 | |
1353 | && (tls_type & GOT_TLS_IE)) | |
1354 | new_to_type = R_386_TLS_LE_32; | |
1355 | ||
1356 | if (to_type == R_386_TLS_GD | |
1357 | || to_type == R_386_TLS_GOTDESC | |
1358 | || to_type == R_386_TLS_DESC_CALL) | |
1359 | { | |
1360 | if (tls_type == GOT_TLS_IE_POS) | |
1361 | new_to_type = R_386_TLS_GOTIE; | |
1362 | else if (tls_type & GOT_TLS_IE) | |
1363 | new_to_type = R_386_TLS_IE_32; | |
1364 | } | |
1365 | ||
1366 | /* We checked the transition before when we were called from | |
1367 | elf_i386_check_relocs. We only want to check the new | |
1368 | transition which hasn't been checked before. */ | |
1369 | check = new_to_type != to_type && from_type == to_type; | |
1370 | to_type = new_to_type; | |
1371 | } | |
1372 | ||
1373 | break; | |
1374 | ||
13ae64f3 | 1375 | case R_386_TLS_LDM: |
1d85728f | 1376 | if (info->executable) |
142411ca L |
1377 | to_type = R_386_TLS_LE_32; |
1378 | break; | |
1379 | ||
1380 | default: | |
1381 | return TRUE; | |
1382 | } | |
1383 | ||
1384 | /* Return TRUE if there is no transition. */ | |
1385 | if (from_type == to_type) | |
1386 | return TRUE; | |
1387 | ||
1388 | /* Check if the transition can be performed. */ | |
1389 | if (check | |
1390 | && ! elf_i386_check_tls_transition (abfd, sec, contents, | |
1391 | symtab_hdr, sym_hashes, | |
1392 | from_type, rel, relend)) | |
1393 | { | |
2f629d23 | 1394 | reloc_howto_type *from, *to; |
4c544807 | 1395 | const char *name; |
142411ca L |
1396 | |
1397 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1398 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1399 | ||
4c544807 L |
1400 | if (h) |
1401 | name = h->root.root.string; | |
1402 | else | |
1403 | { | |
4c544807 | 1404 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1405 | |
4c544807 | 1406 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1407 | if (htab == NULL) |
1408 | name = "*unknown*"; | |
1409 | else | |
1410 | { | |
1411 | Elf_Internal_Sym *isym; | |
1412 | ||
1413 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1414 | abfd, r_symndx); | |
1415 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1416 | } | |
4c544807 L |
1417 | } |
1418 | ||
142411ca L |
1419 | (*_bfd_error_handler) |
1420 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1421 | "in section `%A' failed"), | |
4c544807 | 1422 | abfd, sec, from->name, to->name, name, |
142411ca L |
1423 | (unsigned long) rel->r_offset); |
1424 | bfd_set_error (bfd_error_bad_value); | |
1425 | return FALSE; | |
13ae64f3 JJ |
1426 | } |
1427 | ||
142411ca L |
1428 | *r_type = to_type; |
1429 | return TRUE; | |
13ae64f3 JJ |
1430 | } |
1431 | ||
252b5132 | 1432 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1433 | calculate needed space in the global offset table, procedure linkage |
1434 | table, and dynamic reloc sections. */ | |
252b5132 | 1435 | |
b34976b6 | 1436 | static bfd_boolean |
55fd94b0 AM |
1437 | elf_i386_check_relocs (bfd *abfd, |
1438 | struct bfd_link_info *info, | |
1439 | asection *sec, | |
1440 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1441 | { |
6725bdbf | 1442 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1443 | Elf_Internal_Shdr *symtab_hdr; |
1444 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1445 | const Elf_Internal_Rela *rel; |
1446 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1447 | asection *sreloc; |
dd7e64d4 | 1448 | bfd_boolean use_plt_got; |
252b5132 | 1449 | |
1049f94e | 1450 | if (info->relocatable) |
b34976b6 | 1451 | return TRUE; |
252b5132 | 1452 | |
0ffa91dd NC |
1453 | BFD_ASSERT (is_i386_elf (abfd)); |
1454 | ||
6725bdbf | 1455 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1456 | if (htab == NULL) |
1457 | return FALSE; | |
1458 | ||
dd7e64d4 L |
1459 | use_plt_got = (!get_elf_i386_backend_data (abfd)->is_vxworks |
1460 | && (get_elf_i386_backend_data (abfd) | |
1461 | == &elf_i386_arch_bed)); | |
1462 | ||
0ffa91dd | 1463 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1464 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1465 | |
252b5132 RH |
1466 | sreloc = NULL; |
1467 | ||
1468 | rel_end = relocs + sec->reloc_count; | |
1469 | for (rel = relocs; rel < rel_end; rel++) | |
1470 | { | |
13ae64f3 | 1471 | unsigned int r_type; |
252b5132 RH |
1472 | unsigned long r_symndx; |
1473 | struct elf_link_hash_entry *h; | |
4c544807 L |
1474 | Elf_Internal_Sym *isym; |
1475 | const char *name; | |
06a6a421 | 1476 | bfd_boolean size_reloc; |
252b5132 RH |
1477 | |
1478 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1479 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1480 | |
d9bc7a44 | 1481 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1482 | { |
d003868e AM |
1483 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1484 | abfd, | |
8f615d07 | 1485 | r_symndx); |
b34976b6 | 1486 | return FALSE; |
f5f31454 L |
1487 | } |
1488 | ||
252b5132 | 1489 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1490 | { |
1491 | /* A local symbol. */ | |
c2e61a4e L |
1492 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1493 | abfd, r_symndx); | |
1494 | if (isym == NULL) | |
1495 | return FALSE; | |
c25bc9fc L |
1496 | |
1497 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1498 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1499 | { | |
9fff0c39 | 1500 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1501 | if (h == NULL) |
c2e61a4e | 1502 | return FALSE; |
6bbec505 | 1503 | |
c25bc9fc L |
1504 | /* Fake a STT_GNU_IFUNC symbol. */ |
1505 | h->type = STT_GNU_IFUNC; | |
1506 | h->def_regular = 1; | |
1507 | h->ref_regular = 1; | |
1508 | h->forced_local = 1; | |
1509 | h->root.type = bfd_link_hash_defined; | |
1510 | } | |
1511 | else | |
1512 | h = NULL; | |
1513 | } | |
252b5132 | 1514 | else |
71cb9464 | 1515 | { |
4c544807 | 1516 | isym = NULL; |
71cb9464 L |
1517 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1518 | while (h->root.type == bfd_link_hash_indirect | |
1519 | || h->root.type == bfd_link_hash_warning) | |
1520 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1521 | } |
cbe950e9 | 1522 | |
c25bc9fc L |
1523 | if (h != NULL) |
1524 | { | |
cbe950e9 L |
1525 | /* Create the ifunc sections for static executables. If we |
1526 | never see an indirect function symbol nor we are building | |
1527 | a static executable, those sections will be empty and | |
1528 | won't appear in output. */ | |
1529 | switch (r_type) | |
1530 | { | |
1531 | default: | |
1532 | break; | |
1533 | ||
1534 | case R_386_32: | |
1535 | case R_386_PC32: | |
1536 | case R_386_PLT32: | |
1537 | case R_386_GOT32: | |
1538 | case R_386_GOTOFF: | |
9d4057ee AM |
1539 | if (htab->elf.dynobj == NULL) |
1540 | htab->elf.dynobj = abfd; | |
1541 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1542 | return FALSE; |
cbe950e9 L |
1543 | break; |
1544 | } | |
1545 | ||
ad1e85de L |
1546 | /* It is referenced by a non-shared object. */ |
1547 | h->ref_regular = 1; | |
61315175 | 1548 | h->root.non_ir_ref = 1; |
71cb9464 | 1549 | } |
252b5132 | 1550 | |
142411ca L |
1551 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1552 | symtab_hdr, sym_hashes, | |
1553 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1554 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1555 | return FALSE; |
13ae64f3 JJ |
1556 | |
1557 | switch (r_type) | |
252b5132 | 1558 | { |
37e55690 JJ |
1559 | case R_386_TLS_LDM: |
1560 | htab->tls_ldm_got.refcount += 1; | |
1561 | goto create_got; | |
1562 | ||
1563 | case R_386_PLT32: | |
1564 | /* This symbol requires a procedure linkage table entry. We | |
1565 | actually build the entry in adjust_dynamic_symbol, | |
1566 | because this might be a case of linking PIC code which is | |
1567 | never referenced by a dynamic object, in which case we | |
1568 | don't need to generate a procedure linkage table entry | |
1569 | after all. */ | |
1570 | ||
1571 | /* If this is a local symbol, we resolve it directly without | |
1572 | creating a procedure linkage table entry. */ | |
1573 | if (h == NULL) | |
1574 | continue; | |
1575 | ||
f5385ebf | 1576 | h->needs_plt = 1; |
37e55690 JJ |
1577 | h->plt.refcount += 1; |
1578 | break; | |
1579 | ||
6a3e1bae | 1580 | case R_386_SIZE32: |
06a6a421 | 1581 | size_reloc = TRUE; |
6a3e1bae L |
1582 | goto do_size; |
1583 | ||
13ae64f3 | 1584 | case R_386_TLS_IE_32: |
37e55690 JJ |
1585 | case R_386_TLS_IE: |
1586 | case R_386_TLS_GOTIE: | |
1d85728f | 1587 | if (!info->executable) |
13ae64f3 | 1588 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1589 | /* Fall through */ |
1590 | ||
252b5132 | 1591 | case R_386_GOT32: |
13ae64f3 | 1592 | case R_386_TLS_GD: |
67a4f2b7 AO |
1593 | case R_386_TLS_GOTDESC: |
1594 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1595 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1596 | { |
1597 | int tls_type, old_tls_type; | |
1598 | ||
1599 | switch (r_type) | |
1600 | { | |
1601 | default: | |
1602 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1603 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1604 | case R_386_TLS_GOTDESC: |
1605 | case R_386_TLS_DESC_CALL: | |
1606 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1607 | case R_386_TLS_IE_32: |
1608 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1609 | tls_type = GOT_TLS_IE_NEG; | |
1610 | else | |
ebcfb3c0 JJ |
1611 | /* If this is a GD->IE transition, we may use either of |
1612 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1613 | tls_type = GOT_TLS_IE; |
1614 | break; | |
1615 | case R_386_TLS_IE: | |
1616 | case R_386_TLS_GOTIE: | |
1617 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1618 | } |
1619 | ||
1620 | if (h != NULL) | |
1621 | { | |
1622 | h->got.refcount += 1; | |
1623 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1624 | } | |
1625 | else | |
1626 | { | |
1627 | bfd_signed_vma *local_got_refcounts; | |
1628 | ||
1629 | /* This is a global offset table entry for a local symbol. */ | |
1630 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1631 | if (local_got_refcounts == NULL) | |
1632 | { | |
1633 | bfd_size_type size; | |
1634 | ||
1635 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1636 | size *= (sizeof (bfd_signed_vma) |
1637 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1638 | local_got_refcounts = (bfd_signed_vma *) |
1639 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1640 | if (local_got_refcounts == NULL) |
c2e61a4e | 1641 | return FALSE; |
13ae64f3 | 1642 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1643 | elf_i386_local_tlsdesc_gotent (abfd) |
1644 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1645 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1646 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1647 | } |
1648 | local_got_refcounts[r_symndx] += 1; | |
1649 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1650 | } | |
1651 | ||
37e55690 JJ |
1652 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1653 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1654 | /* If a TLS symbol is accessed using IE at least once, |
1655 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1656 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1657 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1658 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1659 | { |
67a4f2b7 | 1660 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1661 | tls_type = old_tls_type; |
67a4f2b7 AO |
1662 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1663 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1664 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1665 | else |
1666 | { | |
09a24cbf | 1667 | if (h) |
4c544807 L |
1668 | name = h->root.root.string; |
1669 | else | |
1670 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1671 | NULL); | |
13ae64f3 | 1672 | (*_bfd_error_handler) |
d003868e | 1673 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1674 | "thread local symbol"), |
4c544807 | 1675 | abfd, name); |
68c4a57e | 1676 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1677 | return FALSE; |
13ae64f3 JJ |
1678 | } |
1679 | } | |
1680 | ||
1681 | if (old_tls_type != tls_type) | |
1682 | { | |
1683 | if (h != NULL) | |
1684 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1685 | else | |
1686 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1687 | } | |
1688 | } | |
0ac8d2ca AM |
1689 | /* Fall through */ |
1690 | ||
1691 | case R_386_GOTOFF: | |
1692 | case R_386_GOTPC: | |
13ae64f3 | 1693 | create_got: |
6de2ae4a | 1694 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
1695 | { |
1696 | if (htab->elf.dynobj == NULL) | |
1697 | htab->elf.dynobj = abfd; | |
6de2ae4a | 1698 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c2e61a4e | 1699 | return FALSE; |
0ac8d2ca | 1700 | } |
37e55690 JJ |
1701 | if (r_type != R_386_TLS_IE) |
1702 | break; | |
1703 | /* Fall through */ | |
252b5132 | 1704 | |
37e55690 JJ |
1705 | case R_386_TLS_LE_32: |
1706 | case R_386_TLS_LE: | |
1d85728f | 1707 | if (info->executable) |
37e55690 | 1708 | break; |
bffbf940 | 1709 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1710 | /* Fall through */ |
252b5132 RH |
1711 | |
1712 | case R_386_32: | |
1713 | case R_386_PC32: | |
710ab287 | 1714 | if (h != NULL && info->executable) |
6725bdbf | 1715 | { |
12d0ee4a | 1716 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1717 | need a copy reloc. We can't check reliably at this |
1718 | stage whether the section is read-only, as input | |
1719 | sections have not yet been mapped to output sections. | |
1720 | Tentatively set the flag for now, and correct in | |
1721 | adjust_dynamic_symbol. */ | |
f5385ebf | 1722 | h->non_got_ref = 1; |
12d0ee4a AM |
1723 | |
1724 | /* We may need a .plt entry if the function this reloc | |
1725 | refers to is in a shared lib. */ | |
51b64d56 | 1726 | h->plt.refcount += 1; |
c6585bbb | 1727 | if (r_type != R_386_PC32) |
f5385ebf | 1728 | h->pointer_equality_needed = 1; |
6725bdbf | 1729 | } |
7843f00e | 1730 | |
06a6a421 | 1731 | size_reloc = FALSE; |
6a3e1bae | 1732 | do_size: |
252b5132 | 1733 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1734 | against a global symbol, or a non PC relative reloc |
1735 | against a local symbol, then we need to copy the reloc | |
1736 | into the shared library. However, if we are linking with | |
1737 | -Bsymbolic, we do not need to copy a reloc against a | |
1738 | global symbol which is defined in an object we are | |
1739 | including in the link (i.e., DEF_REGULAR is set). At | |
1740 | this point we have not seen all the input files, so it is | |
1741 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1742 | later (it is never cleared). In case of a weak definition, |
1743 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1744 | a shared library. We account for that possibility below by |
1f655a09 L |
1745 | storing information in the relocs_copied field of the hash |
1746 | table entry. A similar situation occurs when creating | |
1747 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1748 | symbol local. |
56882138 | 1749 | |
12d0ee4a AM |
1750 | If on the other hand, we are creating an executable, we |
1751 | may need to keep relocations for symbols satisfied by a | |
1752 | dynamic library if we manage to avoid copy relocs for the | |
1753 | symbol. */ | |
1754 | if ((info->shared | |
1755 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1756 | && (r_type != R_386_PC32 |
12d0ee4a | 1757 | || (h != NULL |
55255dae | 1758 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1759 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1760 | || !h->def_regular)))) |
a23b6845 AM |
1761 | || (ELIMINATE_COPY_RELOCS |
1762 | && !info->shared | |
12d0ee4a AM |
1763 | && (sec->flags & SEC_ALLOC) != 0 |
1764 | && h != NULL | |
12d0ee4a | 1765 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1766 | || !h->def_regular))) |
252b5132 | 1767 | { |
e03a8ed8 L |
1768 | struct elf_dyn_relocs *p; |
1769 | struct elf_dyn_relocs **head; | |
ec338859 | 1770 | |
12d0ee4a AM |
1771 | /* We must copy these reloc types into the output file. |
1772 | Create a reloc section in dynobj and make room for | |
1773 | this reloc. */ | |
252b5132 RH |
1774 | if (sreloc == NULL) |
1775 | { | |
0ac8d2ca AM |
1776 | if (htab->elf.dynobj == NULL) |
1777 | htab->elf.dynobj = abfd; | |
1778 | ||
83bac4b0 NC |
1779 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1780 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1781 | ||
252b5132 | 1782 | if (sreloc == NULL) |
c2e61a4e | 1783 | return FALSE; |
252b5132 RH |
1784 | } |
1785 | ||
0c715baa AM |
1786 | /* If this is a global symbol, we count the number of |
1787 | relocations we need for this symbol. */ | |
1788 | if (h != NULL) | |
252b5132 | 1789 | { |
ec338859 | 1790 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1791 | } |
1792 | else | |
1793 | { | |
ec338859 AM |
1794 | /* Track dynamic relocs needed for local syms too. |
1795 | We really need local syms available to do this | |
1796 | easily. Oh well. */ | |
87d72d41 | 1797 | void **vpp; |
ec338859 | 1798 | asection *s; |
87d72d41 AM |
1799 | |
1800 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1801 | abfd, r_symndx); | |
1802 | if (isym == NULL) | |
1803 | return FALSE; | |
1804 | ||
1805 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1806 | if (s == NULL) |
87d72d41 | 1807 | s = sec; |
ec338859 | 1808 | |
e81d3500 | 1809 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1810 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1811 | } |
1812 | ||
1813 | p = *head; | |
1814 | if (p == NULL || p->sec != sec) | |
1815 | { | |
1816 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1817 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1818 | amt); | |
ec338859 | 1819 | if (p == NULL) |
c2e61a4e | 1820 | return FALSE; |
ec338859 AM |
1821 | p->next = *head; |
1822 | *head = p; | |
1823 | p->sec = sec; | |
1824 | p->count = 0; | |
1825 | p->pc_count = 0; | |
252b5132 | 1826 | } |
ec338859 AM |
1827 | |
1828 | p->count += 1; | |
06a6a421 L |
1829 | /* Count size relocation as PC-relative relocation. */ |
1830 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 1831 | p->pc_count += 1; |
252b5132 | 1832 | } |
252b5132 RH |
1833 | break; |
1834 | ||
1835 | /* This relocation describes the C++ object vtable hierarchy. | |
1836 | Reconstruct it for later use during GC. */ | |
1837 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1838 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1839 | return FALSE; |
252b5132 RH |
1840 | break; |
1841 | ||
1842 | /* This relocation describes which C++ vtable entries are actually | |
1843 | used. Record for later use during GC. */ | |
1844 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1845 | BFD_ASSERT (h != NULL); |
1846 | if (h != NULL | |
1847 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c2e61a4e | 1848 | return FALSE; |
252b5132 RH |
1849 | break; |
1850 | ||
1851 | default: | |
1852 | break; | |
1853 | } | |
dd7e64d4 L |
1854 | |
1855 | if (use_plt_got | |
1856 | && h != NULL | |
1857 | && h->plt.refcount > 0 | |
1858 | && h->got.refcount > 0 | |
1859 | && htab->plt_got == NULL) | |
1860 | { | |
1861 | /* Create the GOT procedure linkage table. */ | |
1862 | unsigned int plt_got_align; | |
1863 | const struct elf_backend_data *bed; | |
1864 | ||
1865 | bed = get_elf_backend_data (info->output_bfd); | |
1866 | BFD_ASSERT (sizeof (elf_i386_got_plt_entry) == 8 | |
1867 | && (sizeof (elf_i386_got_plt_entry) | |
1868 | == sizeof (elf_i386_pic_got_plt_entry))); | |
1869 | plt_got_align = 3; | |
1870 | ||
1871 | if (htab->elf.dynobj == NULL) | |
1872 | htab->elf.dynobj = abfd; | |
1873 | htab->plt_got | |
1874 | = bfd_make_section_anyway_with_flags (htab->elf.dynobj, | |
1875 | ".plt.got", | |
1876 | (bed->dynamic_sec_flags | |
1877 | | SEC_ALLOC | |
1878 | | SEC_CODE | |
1879 | | SEC_LOAD | |
1880 | | SEC_READONLY)); | |
1881 | if (htab->plt_got == NULL | |
1882 | || !bfd_set_section_alignment (htab->elf.dynobj, | |
1883 | htab->plt_got, | |
1884 | plt_got_align)) | |
1885 | return FALSE; | |
1886 | } | |
252b5132 RH |
1887 | } |
1888 | ||
b34976b6 | 1889 | return TRUE; |
252b5132 RH |
1890 | } |
1891 | ||
1892 | /* Return the section that should be marked against GC for a given | |
1893 | relocation. */ | |
1894 | ||
1895 | static asection * | |
55fd94b0 | 1896 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1897 | struct bfd_link_info *info, |
55fd94b0 AM |
1898 | Elf_Internal_Rela *rel, |
1899 | struct elf_link_hash_entry *h, | |
1900 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1901 | { |
1902 | if (h != NULL) | |
07adf181 AM |
1903 | switch (ELF32_R_TYPE (rel->r_info)) |
1904 | { | |
1905 | case R_386_GNU_VTINHERIT: | |
1906 | case R_386_GNU_VTENTRY: | |
1907 | return NULL; | |
1908 | } | |
1909 | ||
1910 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1911 | } |
1912 | ||
1913 | /* Update the got entry reference counts for the section being removed. */ | |
1914 | ||
b34976b6 | 1915 | static bfd_boolean |
55fd94b0 AM |
1916 | elf_i386_gc_sweep_hook (bfd *abfd, |
1917 | struct bfd_link_info *info, | |
1918 | asection *sec, | |
1919 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1920 | { |
4dfe6ac6 | 1921 | struct elf_i386_link_hash_table *htab; |
dd5724d5 AM |
1922 | Elf_Internal_Shdr *symtab_hdr; |
1923 | struct elf_link_hash_entry **sym_hashes; | |
1924 | bfd_signed_vma *local_got_refcounts; | |
1925 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1926 | |
7dda2462 TG |
1927 | if (info->relocatable) |
1928 | return TRUE; | |
1929 | ||
4dfe6ac6 NC |
1930 | htab = elf_i386_hash_table (info); |
1931 | if (htab == NULL) | |
1932 | return FALSE; | |
1933 | ||
ec338859 | 1934 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1935 | |
0ffa91dd | 1936 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
1937 | sym_hashes = elf_sym_hashes (abfd); |
1938 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1939 | |
1940 | relend = relocs + sec->reloc_count; | |
1941 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1942 | { |
1943 | unsigned long r_symndx; | |
1944 | unsigned int r_type; | |
1945 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1946 | |
26e41594 AM |
1947 | r_symndx = ELF32_R_SYM (rel->r_info); |
1948 | if (r_symndx >= symtab_hdr->sh_info) | |
1949 | { | |
26e41594 | 1950 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1951 | while (h->root.type == bfd_link_hash_indirect |
1952 | || h->root.type == bfd_link_hash_warning) | |
1953 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1954 | } |
bb1cb422 L |
1955 | else |
1956 | { | |
1957 | /* A local symbol. */ | |
1958 | Elf_Internal_Sym *isym; | |
1959 | ||
1960 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1961 | abfd, r_symndx); | |
1962 | ||
1963 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1964 | if (isym != NULL | |
1965 | && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1966 | { | |
1967 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE); | |
1968 | if (h == NULL) | |
1969 | abort (); | |
1970 | } | |
1971 | } | |
0c715baa | 1972 | |
3db2e7dd L |
1973 | if (h) |
1974 | { | |
1975 | struct elf_i386_link_hash_entry *eh; | |
1976 | struct elf_dyn_relocs **pp; | |
1977 | struct elf_dyn_relocs *p; | |
1978 | ||
1979 | eh = (struct elf_i386_link_hash_entry *) h; | |
1980 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1981 | if (p->sec == sec) | |
1982 | { | |
1983 | /* Everything must go for SEC. */ | |
1984 | *pp = p->next; | |
1985 | break; | |
1986 | } | |
1987 | } | |
1988 | ||
26e41594 | 1989 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
1990 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1991 | symtab_hdr, sym_hashes, | |
1992 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1993 | rel, relend, h, r_symndx)) |
142411ca L |
1994 | return FALSE; |
1995 | ||
26e41594 AM |
1996 | switch (r_type) |
1997 | { | |
1998 | case R_386_TLS_LDM: | |
4dfe6ac6 NC |
1999 | if (htab->tls_ldm_got.refcount > 0) |
2000 | htab->tls_ldm_got.refcount -= 1; | |
26e41594 | 2001 | break; |
0c715baa | 2002 | |
26e41594 | 2003 | case R_386_TLS_GD: |
67a4f2b7 AO |
2004 | case R_386_TLS_GOTDESC: |
2005 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
2006 | case R_386_TLS_IE_32: |
2007 | case R_386_TLS_IE: | |
2008 | case R_386_TLS_GOTIE: | |
2009 | case R_386_GOT32: | |
2010 | if (h != NULL) | |
2011 | { | |
2012 | if (h->got.refcount > 0) | |
2013 | h->got.refcount -= 1; | |
bb1cb422 L |
2014 | if (h->type == STT_GNU_IFUNC) |
2015 | { | |
2016 | if (h->plt.refcount > 0) | |
2017 | h->plt.refcount -= 1; | |
2018 | } | |
26e41594 AM |
2019 | } |
2020 | else if (local_got_refcounts != NULL) | |
2021 | { | |
2022 | if (local_got_refcounts[r_symndx] > 0) | |
2023 | local_got_refcounts[r_symndx] -= 1; | |
2024 | } | |
2025 | break; | |
0c715baa | 2026 | |
26e41594 AM |
2027 | case R_386_32: |
2028 | case R_386_PC32: | |
1788fc08 | 2029 | case R_386_SIZE32: |
3db2e7dd L |
2030 | if (info->shared |
2031 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2032 | break; |
2033 | /* Fall through */ | |
6725bdbf | 2034 | |
26e41594 AM |
2035 | case R_386_PLT32: |
2036 | if (h != NULL) | |
2037 | { | |
2038 | if (h->plt.refcount > 0) | |
2039 | h->plt.refcount -= 1; | |
2040 | } | |
2041 | break; | |
dd5724d5 | 2042 | |
bb1cb422 L |
2043 | case R_386_GOTOFF: |
2044 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2045 | { | |
2046 | if (h->got.refcount > 0) | |
2047 | h->got.refcount -= 1; | |
2048 | if (h->plt.refcount > 0) | |
2049 | h->plt.refcount -= 1; | |
2050 | } | |
2051 | break; | |
2052 | ||
26e41594 AM |
2053 | default: |
2054 | break; | |
2055 | } | |
2056 | } | |
252b5132 | 2057 | |
b34976b6 | 2058 | return TRUE; |
252b5132 RH |
2059 | } |
2060 | ||
2061 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2062 | regular object. The current definition is in some section of the | |
2063 | dynamic object, but we're not including those sections. We have to | |
2064 | change the definition to something the rest of the link can | |
2065 | understand. */ | |
2066 | ||
b34976b6 | 2067 | static bfd_boolean |
55fd94b0 AM |
2068 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2069 | struct elf_link_hash_entry *h) | |
252b5132 | 2070 | { |
6725bdbf | 2071 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2072 | asection *s; |
5ca5bb35 L |
2073 | struct elf_i386_link_hash_entry *eh; |
2074 | struct elf_dyn_relocs *p; | |
252b5132 | 2075 | |
cbe950e9 L |
2076 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2077 | if (h->type == STT_GNU_IFUNC) | |
2078 | { | |
73bcf233 L |
2079 | /* All local STT_GNU_IFUNC references must be treate as local |
2080 | calls via local PLT. */ | |
5ca5bb35 L |
2081 | if (h->ref_regular |
2082 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2083 | { | |
73bcf233 | 2084 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2085 | struct elf_dyn_relocs **pp; |
2086 | ||
2087 | eh = (struct elf_i386_link_hash_entry *) h; | |
2088 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2089 | { | |
2090 | pc_count += p->pc_count; | |
2091 | p->count -= p->pc_count; | |
2092 | p->pc_count = 0; | |
73bcf233 | 2093 | count += p->count; |
5ca5bb35 L |
2094 | if (p->count == 0) |
2095 | *pp = p->next; | |
2096 | else | |
2097 | pp = &p->next; | |
2098 | } | |
2099 | ||
73bcf233 | 2100 | if (pc_count || count) |
5ca5bb35 L |
2101 | { |
2102 | h->needs_plt = 1; | |
5ca5bb35 | 2103 | h->non_got_ref = 1; |
a5479e5f L |
2104 | if (h->plt.refcount <= 0) |
2105 | h->plt.refcount = 1; | |
2106 | else | |
2107 | h->plt.refcount += 1; | |
5ca5bb35 L |
2108 | } |
2109 | } | |
2110 | ||
cbe950e9 L |
2111 | if (h->plt.refcount <= 0) |
2112 | { | |
2113 | h->plt.offset = (bfd_vma) -1; | |
2114 | h->needs_plt = 0; | |
2115 | } | |
2116 | return TRUE; | |
2117 | } | |
2118 | ||
252b5132 RH |
2119 | /* If this is a function, put it in the procedure linkage table. We |
2120 | will fill in the contents of the procedure linkage table later, | |
2121 | when we know the address of the .got section. */ | |
2122 | if (h->type == STT_FUNC | |
f5385ebf | 2123 | || h->needs_plt) |
252b5132 | 2124 | { |
6725bdbf | 2125 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2126 | || SYMBOL_CALLS_LOCAL (info, h) |
2127 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2128 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2129 | { |
2130 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2131 | file, but the symbol was never referred to by a dynamic |
2132 | object, or if all references were garbage collected. In | |
2133 | such a case, we don't actually need to build a procedure | |
2134 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2135 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2136 | h->needs_plt = 0; |
252b5132 RH |
2137 | } |
2138 | ||
b34976b6 | 2139 | return TRUE; |
252b5132 | 2140 | } |
6725bdbf AM |
2141 | else |
2142 | /* It's possible that we incorrectly decided a .plt reloc was | |
2143 | needed for an R_386_PC32 reloc to a non-function sym in | |
2144 | check_relocs. We can't decide accurately between function and | |
2145 | non-function syms in check-relocs; Objects loaded later in | |
2146 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2147 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2148 | |
2149 | /* If this is a weak symbol, and there is a real definition, the | |
2150 | processor independent code will have arranged for us to see the | |
2151 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2152 | if (h->u.weakdef != NULL) |
252b5132 | 2153 | { |
f6e332e6 AM |
2154 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2155 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2156 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2157 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2158 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2159 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2160 | return TRUE; |
252b5132 RH |
2161 | } |
2162 | ||
2163 | /* This is a reference to a symbol defined by a dynamic object which | |
2164 | is not a function. */ | |
2165 | ||
2166 | /* If we are creating a shared library, we must presume that the | |
2167 | only references to the symbol are via the global offset table. | |
2168 | For such cases we need not do anything here; the relocations will | |
2169 | be handled correctly by relocate_section. */ | |
2170 | if (info->shared) | |
b34976b6 | 2171 | return TRUE; |
252b5132 | 2172 | |
7843f00e ILT |
2173 | /* If there are no references to this symbol that do not use the |
2174 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2175 | if (!h->non_got_ref) |
b34976b6 | 2176 | return TRUE; |
7843f00e | 2177 | |
8bd621d8 AM |
2178 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2179 | if (info->nocopyreloc) | |
2180 | { | |
f5385ebf | 2181 | h->non_got_ref = 0; |
b34976b6 | 2182 | return TRUE; |
8bd621d8 AM |
2183 | } |
2184 | ||
643796e3 | 2185 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2186 | if (htab == NULL) |
2187 | return FALSE; | |
643796e3 DJ |
2188 | |
2189 | /* If there aren't any dynamic relocs in read-only sections, then | |
2190 | we can keep the dynamic relocs and avoid the copy reloc. This | |
2191 | doesn't work on VxWorks, where we can not have dynamic relocations | |
2192 | (other than copy and jump slot relocations) in an executable. */ | |
23209a78 RM |
2193 | if (ELIMINATE_COPY_RELOCS |
2194 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) | |
ebe50bae | 2195 | { |
a23b6845 AM |
2196 | eh = (struct elf_i386_link_hash_entry *) h; |
2197 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2198 | { | |
2199 | s = p->sec->output_section; | |
2200 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2201 | break; | |
2202 | } | |
2203 | ||
a23b6845 AM |
2204 | if (p == NULL) |
2205 | { | |
f5385ebf | 2206 | h->non_got_ref = 0; |
a23b6845 AM |
2207 | return TRUE; |
2208 | } | |
ebe50bae AM |
2209 | } |
2210 | ||
252b5132 RH |
2211 | /* We must allocate the symbol in our .dynbss section, which will |
2212 | become part of the .bss section of the executable. There will be | |
2213 | an entry for this symbol in the .dynsym section. The dynamic | |
2214 | object will contain position independent code, so all references | |
2215 | from the dynamic object to this symbol will go through the global | |
2216 | offset table. The dynamic linker will use the .dynsym entry to | |
2217 | determine the address it must put in the global offset table, so | |
2218 | both the dynamic object and the regular object will refer to the | |
2219 | same memory location for the variable. */ | |
2220 | ||
252b5132 RH |
2221 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2222 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2223 | runtime process image. */ |
1d7e9d18 | 2224 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2225 | { |
eea6121a | 2226 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2227 | h->needs_copy = 1; |
252b5132 RH |
2228 | } |
2229 | ||
0ac8d2ca | 2230 | s = htab->sdynbss; |
252b5132 | 2231 | |
6cabe1ea | 2232 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2233 | } |
2234 | ||
6725bdbf | 2235 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2236 | dynamic relocs. */ |
6725bdbf | 2237 | |
b34976b6 | 2238 | static bfd_boolean |
eb4ff4d6 | 2239 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2240 | { |
2241 | struct bfd_link_info *info; | |
2242 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2243 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2244 | struct elf_dyn_relocs *p; |
25e762b9 | 2245 | unsigned plt_entry_size; |
6725bdbf | 2246 | |
e92d460e | 2247 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2248 | return TRUE; |
6725bdbf | 2249 | |
cbe950e9 | 2250 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2251 | |
6725bdbf AM |
2252 | info = (struct bfd_link_info *) inf; |
2253 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2254 | if (htab == NULL) |
2255 | return FALSE; | |
6725bdbf | 2256 | |
25e762b9 RM |
2257 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2258 | ||
dd7e64d4 L |
2259 | /* We can't use the GOT PLT if pointer equality is needed since |
2260 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2261 | linker won't update the GOT slot. We will get into an infinite | |
2262 | loop at run-time. */ | |
2263 | if (htab->plt_got != NULL | |
2264 | && h->type != STT_GNU_IFUNC | |
2265 | && !h->pointer_equality_needed | |
2266 | && h->plt.refcount > 0 | |
2267 | && h->got.refcount > 0) | |
2268 | { | |
2269 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2270 | reloctions. */ | |
2271 | h->plt.offset = (bfd_vma) -1; | |
2272 | ||
2273 | /* Use the GOT PLT. */ | |
2274 | eh->plt_got.refcount = 1; | |
2275 | } | |
2276 | ||
cbe950e9 L |
2277 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2278 | here if it is defined and referenced in a non-shared object. */ | |
2279 | if (h->type == STT_GNU_IFUNC | |
2280 | && h->def_regular) | |
25e762b9 | 2281 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
7b70956d WN |
2282 | plt_entry_size, |
2283 | plt_entry_size, 4); | |
cbe950e9 | 2284 | else if (htab->elf.dynamic_sections_created |
dd7e64d4 | 2285 | && (h->plt.refcount > 0 || eh->plt_got.refcount > 0)) |
6725bdbf | 2286 | { |
dd7e64d4 L |
2287 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
2288 | ||
5a15f56f AM |
2289 | /* Make sure this symbol is output as a dynamic symbol. |
2290 | Undefined weak syms won't yet be marked as dynamic. */ | |
2291 | if (h->dynindx == -1 | |
f5385ebf | 2292 | && !h->forced_local) |
5a15f56f | 2293 | { |
c152c796 | 2294 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2295 | return FALSE; |
5a15f56f AM |
2296 | } |
2297 | ||
4e795f50 AM |
2298 | if (info->shared |
2299 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 2300 | { |
6de2ae4a | 2301 | asection *s = htab->elf.splt; |
dd7e64d4 | 2302 | asection *got_s = htab->plt_got; |
6725bdbf | 2303 | |
ced53ee5 AM |
2304 | /* If this is the first .plt entry, make room for the special |
2305 | first entry. */ | |
eea6121a | 2306 | if (s->size == 0) |
bb81b736 | 2307 | s->size = plt_entry_size; |
6725bdbf | 2308 | |
dd7e64d4 L |
2309 | if (use_plt_got) |
2310 | eh->plt_got.offset = got_s->size; | |
2311 | else | |
2312 | h->plt.offset = s->size; | |
6725bdbf | 2313 | |
ced53ee5 AM |
2314 | /* If this symbol is not defined in a regular file, and we are |
2315 | not generating a shared library, then set the symbol to this | |
2316 | location in the .plt. This is required to make function | |
2317 | pointers compare as equal between the normal executable and | |
2318 | the shared library. */ | |
2319 | if (! info->shared | |
f5385ebf | 2320 | && !h->def_regular) |
ced53ee5 | 2321 | { |
dd7e64d4 L |
2322 | if (use_plt_got) |
2323 | { | |
2324 | /* We need to make a call to the entry of the GOT PLT | |
2325 | instead of regular PLT entry. */ | |
2326 | h->root.u.def.section = got_s; | |
2327 | h->root.u.def.value = eh->plt_got.offset; | |
2328 | } | |
2329 | else | |
2330 | { | |
2331 | h->root.u.def.section = s; | |
2332 | h->root.u.def.value = h->plt.offset; | |
2333 | } | |
ced53ee5 | 2334 | } |
6725bdbf | 2335 | |
ced53ee5 | 2336 | /* Make room for this entry. */ |
dd7e64d4 L |
2337 | if (use_plt_got) |
2338 | got_s->size += sizeof (elf_i386_got_plt_entry); | |
2339 | else | |
2340 | { | |
2341 | s->size += plt_entry_size; | |
6725bdbf | 2342 | |
dd7e64d4 L |
2343 | /* We also need to make an entry in the .got.plt section, |
2344 | which will be placed in the .got section by the linker | |
2345 | script. */ | |
2346 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2347 | |
dd7e64d4 L |
2348 | /* We also need to make an entry in the .rel.plt section. */ |
2349 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2350 | htab->elf.srelplt->reloc_count++; | |
2351 | } | |
eac338cf | 2352 | |
23209a78 RM |
2353 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
2354 | && !info->shared) | |
eac338cf PB |
2355 | { |
2356 | /* VxWorks has a second set of relocations for each PLT entry | |
2357 | in executables. They go in a separate relocation section, | |
2358 | which is processed by the kernel loader. */ | |
2359 | ||
2360 | /* There are two relocations for the initial PLT entry: an | |
2361 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2362 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2363 | ||
25e762b9 | 2364 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2365 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2366 | ||
2367 | /* There are two extra relocations for each subsequent PLT entry: | |
2368 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2369 | relocation for the PLT entry. */ | |
2370 | ||
2371 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2372 | } | |
6725bdbf | 2373 | } |
ced53ee5 AM |
2374 | else |
2375 | { | |
51b64d56 | 2376 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2377 | h->needs_plt = 0; |
ced53ee5 | 2378 | } |
6725bdbf AM |
2379 | } |
2380 | else | |
2381 | { | |
51b64d56 | 2382 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2383 | h->needs_plt = 0; |
6725bdbf AM |
2384 | } |
2385 | ||
67a4f2b7 AO |
2386 | eh->tlsdesc_got = (bfd_vma) -1; |
2387 | ||
37e55690 | 2388 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2389 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2390 | if (h->got.refcount > 0 | |
1d85728f | 2391 | && info->executable |
13ae64f3 | 2392 | && h->dynindx == -1 |
37e55690 | 2393 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2394 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2395 | else if (h->got.refcount > 0) |
6725bdbf | 2396 | { |
0ac8d2ca | 2397 | asection *s; |
b34976b6 | 2398 | bfd_boolean dyn; |
13ae64f3 | 2399 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2400 | |
5a15f56f AM |
2401 | /* Make sure this symbol is output as a dynamic symbol. |
2402 | Undefined weak syms won't yet be marked as dynamic. */ | |
2403 | if (h->dynindx == -1 | |
f5385ebf | 2404 | && !h->forced_local) |
5a15f56f | 2405 | { |
c152c796 | 2406 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2407 | return FALSE; |
5a15f56f AM |
2408 | } |
2409 | ||
6de2ae4a | 2410 | s = htab->elf.sgot; |
67a4f2b7 AO |
2411 | if (GOT_TLS_GDESC_P (tls_type)) |
2412 | { | |
6de2ae4a | 2413 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2414 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2415 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2416 | h->got.offset = (bfd_vma) -2; |
2417 | } | |
2418 | if (! GOT_TLS_GDESC_P (tls_type) | |
2419 | || GOT_TLS_GD_P (tls_type)) | |
2420 | { | |
2421 | h->got.offset = s->size; | |
2422 | s->size += 4; | |
2423 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2424 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2425 | s->size += 4; | |
2426 | } | |
ebe50bae | 2427 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2428 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2429 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2430 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2431 | need two), R_386_TLS_GD needs one if local symbol and two if | |
2432 | global. */ | |
2433 | if (tls_type == GOT_TLS_IE_BOTH) | |
6de2ae4a | 2434 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2435 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2436 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2437 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2438 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2439 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2440 | else if (! GOT_TLS_GDESC_P (tls_type) |
2441 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2442 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
2443 | && (info->shared |
2444 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 2445 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2446 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2447 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2448 | } |
2449 | else | |
51b64d56 | 2450 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2451 | |
5a15f56f | 2452 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2453 | return TRUE; |
5a15f56f | 2454 | |
0c715baa AM |
2455 | /* In the shared -Bsymbolic case, discard space allocated for |
2456 | dynamic pc-relative relocs against symbols which turn out to be | |
2457 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2458 | space for pc-relative relocs that have become local due to symbol |
2459 | visibility changes. */ | |
0c715baa AM |
2460 | |
2461 | if (info->shared) | |
5a15f56f | 2462 | { |
09695f56 AM |
2463 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2464 | appear on a call or on something like ".long foo - .". We | |
2465 | want calls to protected symbols to resolve directly to the | |
2466 | function rather than going via the plt. If people want | |
2467 | function pointer comparisons to work as expected then they | |
2468 | should avoid writing assembly like ".long foo - .". */ | |
2469 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2470 | { |
e03a8ed8 | 2471 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2472 | |
2473 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2474 | { | |
c3ce498c L |
2475 | p->count -= p->pc_count; |
2476 | p->pc_count = 0; | |
0c715baa AM |
2477 | if (p->count == 0) |
2478 | *pp = p->next; | |
2479 | else | |
2480 | pp = &p->next; | |
2481 | } | |
5a15f56f | 2482 | } |
4e795f50 | 2483 | |
23209a78 | 2484 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2485 | { |
e03a8ed8 | 2486 | struct elf_dyn_relocs **pp; |
3348747a NS |
2487 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2488 | { | |
2489 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2490 | *pp = p->next; | |
2491 | else | |
2492 | pp = &p->next; | |
2493 | } | |
2494 | } | |
2495 | ||
4e795f50 | 2496 | /* Also discard relocs on undefined weak syms with non-default |
c353e543 | 2497 | visibility. */ |
22d606e9 | 2498 | if (eh->dyn_relocs != NULL |
c353e543 | 2499 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2500 | { |
2501 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2502 | eh->dyn_relocs = NULL; | |
2503 | ||
2504 | /* Make sure undefined weak symbols are output as a dynamic | |
2505 | symbol in PIEs. */ | |
2506 | else if (h->dynindx == -1 | |
2507 | && !h->forced_local) | |
2508 | { | |
2509 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2510 | return FALSE; | |
2511 | } | |
2512 | } | |
0c715baa | 2513 | } |
a23b6845 | 2514 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2515 | { |
2516 | /* For the non-shared case, discard space for relocs against | |
2517 | symbols which turn out to need copy relocs or are not | |
2518 | dynamic. */ | |
2519 | ||
f5385ebf AM |
2520 | if (!h->non_got_ref |
2521 | && ((h->def_dynamic | |
2522 | && !h->def_regular) | |
ebe50bae | 2523 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2524 | && (h->root.type == bfd_link_hash_undefweak |
2525 | || h->root.type == bfd_link_hash_undefined)))) | |
2526 | { | |
2527 | /* Make sure this symbol is output as a dynamic symbol. | |
2528 | Undefined weak syms won't yet be marked as dynamic. */ | |
2529 | if (h->dynindx == -1 | |
f5385ebf | 2530 | && !h->forced_local) |
0c715baa | 2531 | { |
c152c796 | 2532 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2533 | return FALSE; |
0c715baa | 2534 | } |
5a15f56f | 2535 | |
0c715baa AM |
2536 | /* If that succeeded, we know we'll be keeping all the |
2537 | relocs. */ | |
2538 | if (h->dynindx != -1) | |
2539 | goto keep; | |
2540 | } | |
2541 | ||
2542 | eh->dyn_relocs = NULL; | |
2543 | ||
ec338859 | 2544 | keep: ; |
5a15f56f AM |
2545 | } |
2546 | ||
0c715baa AM |
2547 | /* Finally, allocate space. */ |
2548 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2549 | { |
e7c33416 NC |
2550 | asection *sreloc; |
2551 | ||
cbe950e9 | 2552 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2553 | |
2554 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2555 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2556 | } |
2557 | ||
b34976b6 | 2558 | return TRUE; |
6725bdbf AM |
2559 | } |
2560 | ||
c25bc9fc L |
2561 | /* Allocate space in .plt, .got and associated reloc sections for |
2562 | local dynamic relocs. */ | |
2563 | ||
2564 | static bfd_boolean | |
2565 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2566 | { | |
2567 | struct elf_link_hash_entry *h | |
2568 | = (struct elf_link_hash_entry *) *slot; | |
2569 | ||
2570 | if (h->type != STT_GNU_IFUNC | |
2571 | || !h->def_regular | |
2572 | || !h->ref_regular | |
2573 | || !h->forced_local | |
2574 | || h->root.type != bfd_link_hash_defined) | |
2575 | abort (); | |
2576 | ||
2577 | return elf_i386_allocate_dynrelocs (h, inf); | |
2578 | } | |
2579 | ||
0c715baa AM |
2580 | /* Find any dynamic relocs that apply to read-only sections. */ |
2581 | ||
b34976b6 | 2582 | static bfd_boolean |
eb4ff4d6 | 2583 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2584 | { |
2585 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 2586 | struct elf_dyn_relocs *p; |
0c715baa | 2587 | |
aa715242 L |
2588 | /* Skip local IFUNC symbols. */ |
2589 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2590 | return TRUE; | |
2591 | ||
0c715baa AM |
2592 | eh = (struct elf_i386_link_hash_entry *) h; |
2593 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2594 | { | |
2595 | asection *s = p->sec->output_section; | |
2596 | ||
2597 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2598 | { | |
2599 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2600 | ||
2601 | info->flags |= DF_TEXTREL; | |
2602 | ||
1952c5cd L |
2603 | if ((info->warn_shared_textrel && info->shared) |
2604 | || info->error_textrel) | |
2605 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), | |
b70321a2 L |
2606 | p->sec->owner, h->root.root.string, |
2607 | p->sec); | |
2608 | ||
0c715baa | 2609 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2610 | return FALSE; |
0c715baa AM |
2611 | } |
2612 | } | |
b34976b6 | 2613 | return TRUE; |
0c715baa AM |
2614 | } |
2615 | ||
daa67607 L |
2616 | /* Convert |
2617 | mov foo@GOT(%reg), %reg | |
2618 | to | |
2619 | lea foo@GOTOFF(%reg), %reg | |
2620 | with the local symbol, foo. */ | |
2621 | ||
2622 | static bfd_boolean | |
2623 | elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2624 | struct bfd_link_info *link_info) | |
2625 | { | |
2626 | Elf_Internal_Shdr *symtab_hdr; | |
2627 | Elf_Internal_Rela *internal_relocs; | |
2628 | Elf_Internal_Rela *irel, *irelend; | |
2629 | bfd_byte *contents; | |
2630 | struct elf_i386_link_hash_table *htab; | |
2631 | bfd_boolean changed_contents; | |
2632 | bfd_boolean changed_relocs; | |
2633 | bfd_signed_vma *local_got_refcounts; | |
2634 | ||
2635 | /* Don't even try to convert non-ELF outputs. */ | |
2636 | if (!is_elf_hash_table (link_info->hash)) | |
2637 | return FALSE; | |
2638 | ||
fbdc86d9 | 2639 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2640 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 | 2641 | || sec->reloc_count == 0 |
c8831961 | 2642 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
2643 | return TRUE; |
2644 | ||
2645 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2646 | ||
2647 | /* Load the relocations for this section. */ | |
2648 | internal_relocs = (_bfd_elf_link_read_relocs | |
2649 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2650 | link_info->keep_memory)); | |
2651 | if (internal_relocs == NULL) | |
2652 | return FALSE; | |
2653 | ||
2654 | htab = elf_i386_hash_table (link_info); | |
2655 | changed_contents = FALSE; | |
2656 | changed_relocs = FALSE; | |
2657 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2658 | ||
2659 | /* Get the section contents. */ | |
2660 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2661 | contents = elf_section_data (sec)->this_hdr.contents; | |
2662 | else | |
2663 | { | |
2664 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2665 | goto error_return; | |
2666 | } | |
2667 | ||
2668 | irelend = internal_relocs + sec->reloc_count; | |
2669 | for (irel = internal_relocs; irel < irelend; irel++) | |
2670 | { | |
2671 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2672 | unsigned int r_symndx = ELF32_R_SYM (irel->r_info); | |
2673 | unsigned int indx; | |
2674 | struct elf_link_hash_entry *h; | |
2675 | ||
2676 | if (r_type != R_386_GOT32) | |
2677 | continue; | |
2678 | ||
2679 | /* Get the symbol referred to by the reloc. */ | |
2680 | if (r_symndx < symtab_hdr->sh_info) | |
2681 | { | |
2682 | Elf_Internal_Sym *isym; | |
2683 | ||
2684 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2685 | abfd, r_symndx); | |
2686 | ||
2687 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */ | |
2688 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
5697705a | 2689 | && irel->r_offset >= 2 |
daa67607 L |
2690 | && bfd_get_8 (input_bfd, |
2691 | contents + irel->r_offset - 2) == 0x8b) | |
2692 | { | |
2693 | bfd_put_8 (output_bfd, 0x8d, | |
2694 | contents + irel->r_offset - 2); | |
2695 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2696 | if (local_got_refcounts != NULL | |
2697 | && local_got_refcounts[r_symndx] > 0) | |
2698 | local_got_refcounts[r_symndx] -= 1; | |
2699 | changed_contents = TRUE; | |
2700 | changed_relocs = TRUE; | |
2701 | } | |
2702 | continue; | |
2703 | } | |
2704 | ||
2705 | indx = r_symndx - symtab_hdr->sh_info; | |
2706 | h = elf_sym_hashes (abfd)[indx]; | |
2707 | BFD_ASSERT (h != NULL); | |
2708 | ||
2709 | while (h->root.type == bfd_link_hash_indirect | |
2710 | || h->root.type == bfd_link_hash_warning) | |
2711 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2712 | ||
3f65f599 L |
2713 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid |
2714 | optimizing _DYNAMIC since ld.so may use its link-time address. */ | |
daa67607 L |
2715 | if (h->def_regular |
2716 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2717 | && h != htab->elf.hdynamic |
daa67607 | 2718 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
5697705a | 2719 | && irel->r_offset >= 2 |
daa67607 L |
2720 | && bfd_get_8 (input_bfd, |
2721 | contents + irel->r_offset - 2) == 0x8b) | |
2722 | { | |
2723 | bfd_put_8 (output_bfd, 0x8d, | |
2724 | contents + irel->r_offset - 2); | |
2725 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2726 | if (h->got.refcount > 0) | |
2727 | h->got.refcount -= 1; | |
2728 | changed_contents = TRUE; | |
2729 | changed_relocs = TRUE; | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | if (contents != NULL | |
2734 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2735 | { | |
2736 | if (!changed_contents && !link_info->keep_memory) | |
2737 | free (contents); | |
2738 | else | |
2739 | { | |
2740 | /* Cache the section contents for elf_link_input_bfd. */ | |
2741 | elf_section_data (sec)->this_hdr.contents = contents; | |
2742 | } | |
2743 | } | |
2744 | ||
2745 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2746 | { | |
2747 | if (!changed_relocs) | |
2748 | free (internal_relocs); | |
2749 | else | |
2750 | elf_section_data (sec)->relocs = internal_relocs; | |
2751 | } | |
2752 | ||
2753 | return TRUE; | |
2754 | ||
2755 | error_return: | |
2756 | if (contents != NULL | |
2757 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2758 | free (contents); | |
2759 | if (internal_relocs != NULL | |
2760 | && elf_section_data (sec)->relocs != internal_relocs) | |
2761 | free (internal_relocs); | |
2762 | return FALSE; | |
2763 | } | |
2764 | ||
252b5132 RH |
2765 | /* Set the sizes of the dynamic sections. */ |
2766 | ||
b34976b6 | 2767 | static bfd_boolean |
23209a78 | 2768 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 2769 | { |
6725bdbf | 2770 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2771 | bfd *dynobj; |
2772 | asection *s; | |
b34976b6 | 2773 | bfd_boolean relocs; |
0c715baa | 2774 | bfd *ibfd; |
252b5132 | 2775 | |
6725bdbf | 2776 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2777 | if (htab == NULL) |
2778 | return FALSE; | |
ebe50bae | 2779 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2780 | if (dynobj == NULL) |
2781 | abort (); | |
252b5132 | 2782 | |
ebe50bae | 2783 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2784 | { |
2785 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2786 | if (info->executable) |
252b5132 | 2787 | { |
3d4d4302 | 2788 | s = bfd_get_linker_section (dynobj, ".interp"); |
ffb2e45b AM |
2789 | if (s == NULL) |
2790 | abort (); | |
eea6121a | 2791 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
2792 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2793 | } | |
161d71a6 | 2794 | } |
6725bdbf | 2795 | |
0c715baa AM |
2796 | /* Set up .got offsets for local syms, and space for local dynamic |
2797 | relocs. */ | |
c72f2fb2 | 2798 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
2799 | { |
2800 | bfd_signed_vma *local_got; | |
2801 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2802 | char *local_tls_type; |
67a4f2b7 | 2803 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2804 | bfd_size_type locsymcount; |
2805 | Elf_Internal_Shdr *symtab_hdr; | |
2806 | asection *srel; | |
6725bdbf | 2807 | |
0ffa91dd | 2808 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2809 | continue; |
6725bdbf | 2810 | |
0c715baa AM |
2811 | for (s = ibfd->sections; s != NULL; s = s->next) |
2812 | { | |
e03a8ed8 | 2813 | struct elf_dyn_relocs *p; |
0c715baa | 2814 | |
daa67607 L |
2815 | if (!elf_i386_convert_mov_to_lea (ibfd, s, info)) |
2816 | return FALSE; | |
2817 | ||
e03a8ed8 | 2818 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 2819 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
2820 | p != NULL; |
2821 | p = p->next) | |
0c715baa | 2822 | { |
ec338859 AM |
2823 | if (!bfd_is_abs_section (p->sec) |
2824 | && bfd_is_abs_section (p->sec->output_section)) | |
2825 | { | |
2826 | /* Input section has been discarded, either because | |
2827 | it is a copy of a linkonce section or due to | |
2828 | linker script /DISCARD/, so we'll be discarding | |
2829 | the relocs too. */ | |
2830 | } | |
23209a78 | 2831 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
2832 | && strcmp (p->sec->output_section->name, |
2833 | ".tls_vars") == 0) | |
2834 | { | |
2835 | /* Relocations in vxworks .tls_vars sections are | |
2836 | handled specially by the loader. */ | |
2837 | } | |
248866a8 | 2838 | else if (p->count != 0) |
ec338859 AM |
2839 | { |
2840 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2841 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
2842 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2843 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2844 | { |
2845 | info->flags |= DF_TEXTREL; | |
1952c5cd L |
2846 | if ((info->warn_shared_textrel && info->shared) |
2847 | || info->error_textrel) | |
2848 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), | |
b70321a2 | 2849 | p->sec->owner, p->sec); |
b70321a2 | 2850 | } |
ec338859 | 2851 | } |
0c715baa AM |
2852 | } |
2853 | } | |
2854 | ||
2855 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2856 | if (!local_got) |
2857 | continue; | |
6725bdbf | 2858 | |
0ffa91dd | 2859 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2860 | locsymcount = symtab_hdr->sh_info; |
2861 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 2862 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 2863 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2864 | s = htab->elf.sgot; |
2865 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2866 | for (; local_got < end_local_got; |
2867 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2868 | { |
67a4f2b7 | 2869 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2870 | if (*local_got > 0) |
6725bdbf | 2871 | { |
67a4f2b7 AO |
2872 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2873 | { | |
6de2ae4a | 2874 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2875 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2876 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2877 | *local_got = (bfd_vma) -2; |
2878 | } | |
2879 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2880 | || GOT_TLS_GD_P (*local_tls_type)) | |
2881 | { | |
2882 | *local_got = s->size; | |
2883 | s->size += 4; | |
2884 | if (GOT_TLS_GD_P (*local_tls_type) | |
2885 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2886 | s->size += 4; | |
2887 | } | |
13ae64f3 | 2888 | if (info->shared |
67a4f2b7 | 2889 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2890 | || (*local_tls_type & GOT_TLS_IE)) |
2891 | { | |
2892 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2893 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2894 | else if (GOT_TLS_GD_P (*local_tls_type) |
2895 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2896 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2897 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 2898 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 2899 | } |
6725bdbf | 2900 | } |
161d71a6 L |
2901 | else |
2902 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2903 | } |
252b5132 | 2904 | } |
6725bdbf | 2905 | |
13ae64f3 JJ |
2906 | if (htab->tls_ldm_got.refcount > 0) |
2907 | { | |
2908 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2909 | relocs. */ | |
6de2ae4a L |
2910 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
2911 | htab->elf.sgot->size += 8; | |
2912 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2913 | } |
2914 | else | |
2915 | htab->tls_ldm_got.offset = -1; | |
2916 | ||
0c715baa AM |
2917 | /* Allocate global sym .plt and .got entries, and space for global |
2918 | sym dynamic relocs. */ | |
eb4ff4d6 | 2919 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2920 | |
c25bc9fc L |
2921 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2922 | htab_traverse (htab->loc_hash_table, | |
2923 | elf_i386_allocate_local_dynrelocs, | |
2924 | info); | |
2925 | ||
67a4f2b7 AO |
2926 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2927 | incremented. However, when we reserve space for TLS descriptors, | |
2928 | it's not incremented, so in order to compute the space reserved | |
2929 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 2930 | slot size. |
caa0075c | 2931 | |
e1f98742 L |
2932 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
2933 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 2934 | if (htab->elf.srelplt) |
e1f98742 L |
2935 | { |
2936 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
2937 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
2938 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2939 | } | |
2940 | else if (htab->elf.irelplt) | |
2941 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2942 | ||
67a4f2b7 | 2943 | |
a7b16ceb L |
2944 | if (htab->elf.sgotplt) |
2945 | { | |
2946 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 2947 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2948 | if ((htab->elf.hgot == NULL |
2949 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2950 | && (htab->elf.sgotplt->size |
2951 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2952 | && (htab->elf.splt == NULL |
2953 | || htab->elf.splt->size == 0) | |
2954 | && (htab->elf.sgot == NULL | |
2955 | || htab->elf.sgot->size == 0) | |
2956 | && (htab->elf.iplt == NULL | |
2957 | || htab->elf.iplt->size == 0) | |
2958 | && (htab->elf.igotplt == NULL | |
2959 | || htab->elf.igotplt->size == 0)) | |
2960 | htab->elf.sgotplt->size = 0; | |
2961 | } | |
2962 | ||
9a2a56cc AM |
2963 | |
2964 | if (htab->plt_eh_frame != NULL | |
2965 | && htab->elf.splt != NULL | |
2966 | && htab->elf.splt->size != 0 | |
2967 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2968 | && _bfd_elf_eh_frame_present (info)) | |
2969 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
2970 | ||
5a15f56f AM |
2971 | /* We now have determined the sizes of the various dynamic sections. |
2972 | Allocate memory for them. */ | |
b34976b6 | 2973 | relocs = FALSE; |
252b5132 RH |
2974 | for (s = dynobj->sections; s != NULL; s = s->next) |
2975 | { | |
eac338cf PB |
2976 | bfd_boolean strip_section = TRUE; |
2977 | ||
252b5132 RH |
2978 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2979 | continue; | |
2980 | ||
6de2ae4a | 2981 | if (s == htab->elf.splt |
9a2a56cc | 2982 | || s == htab->elf.sgot) |
252b5132 | 2983 | { |
6725bdbf AM |
2984 | /* Strip this section if we don't need it; see the |
2985 | comment below. */ | |
eac338cf PB |
2986 | /* We'd like to strip these sections if they aren't needed, but if |
2987 | we've exported dynamic symbols from them we must leave them. | |
2988 | It's too late to tell BFD to get rid of the symbols. */ | |
2989 | ||
7325306f | 2990 | if (htab->elf.hplt != NULL) |
eac338cf | 2991 | strip_section = FALSE; |
252b5132 | 2992 | } |
9a2a56cc AM |
2993 | else if (s == htab->elf.sgotplt |
2994 | || s == htab->elf.iplt | |
2995 | || s == htab->elf.igotplt | |
dd7e64d4 | 2996 | || s == htab->plt_got |
9a2a56cc AM |
2997 | || s == htab->plt_eh_frame |
2998 | || s == htab->sdynbss) | |
2999 | { | |
3000 | /* Strip these too. */ | |
3001 | } | |
0112cd26 | 3002 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3003 | { |
6de2ae4a L |
3004 | if (s->size != 0 |
3005 | && s != htab->elf.srelplt | |
3006 | && s != htab->srelplt2) | |
b34976b6 | 3007 | relocs = TRUE; |
252b5132 | 3008 | |
0ac8d2ca AM |
3009 | /* We use the reloc_count field as a counter if we need |
3010 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3011 | s->reloc_count = 0; |
252b5132 | 3012 | } |
6725bdbf | 3013 | else |
252b5132 RH |
3014 | { |
3015 | /* It's not one of our sections, so don't allocate space. */ | |
3016 | continue; | |
3017 | } | |
3018 | ||
c456f082 | 3019 | if (s->size == 0) |
252b5132 | 3020 | { |
0ac8d2ca AM |
3021 | /* If we don't need this section, strip it from the |
3022 | output file. This is mostly to handle .rel.bss and | |
3023 | .rel.plt. We must create both sections in | |
3024 | create_dynamic_sections, because they must be created | |
3025 | before the linker maps input sections to output | |
3026 | sections. The linker does that before | |
3027 | adjust_dynamic_symbol is called, and it is that | |
3028 | function which decides whether anything needs to go | |
3029 | into these sections. */ | |
c456f082 AM |
3030 | if (strip_section) |
3031 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3032 | continue; |
3033 | } | |
3034 | ||
c456f082 AM |
3035 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3036 | continue; | |
3037 | ||
f69da49f AM |
3038 | /* Allocate memory for the section contents. We use bfd_zalloc |
3039 | here in case unused entries are not reclaimed before the | |
3040 | section's contents are written out. This should not happen, | |
3041 | but this way if it does, we get a R_386_NONE reloc instead | |
3042 | of garbage. */ | |
a50b1753 | 3043 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3044 | if (s->contents == NULL) |
b34976b6 | 3045 | return FALSE; |
252b5132 RH |
3046 | } |
3047 | ||
e41b3a13 | 3048 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3049 | && htab->plt_eh_frame->contents != NULL) |
3050 | { | |
3051 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
3052 | sizeof (elf_i386_eh_frame_plt)); | |
3053 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
3054 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3055 | } | |
e41b3a13 | 3056 | |
ebe50bae | 3057 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3058 | { |
3059 | /* Add some entries to the .dynamic section. We fill in the | |
3060 | values later, in elf_i386_finish_dynamic_sections, but we | |
3061 | must add the entries now so that we get the correct size for | |
3062 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3063 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3064 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3065 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3066 | |
36af4a4e | 3067 | if (info->executable) |
252b5132 | 3068 | { |
dc810e39 | 3069 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3070 | return FALSE; |
252b5132 RH |
3071 | } |
3072 | ||
6de2ae4a | 3073 | if (htab->elf.splt->size != 0) |
252b5132 | 3074 | { |
dc810e39 AM |
3075 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
3076 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3077 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3078 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3079 | return FALSE; |
252b5132 RH |
3080 | } |
3081 | ||
3082 | if (relocs) | |
3083 | { | |
dc810e39 AM |
3084 | if (!add_dynamic_entry (DT_REL, 0) |
3085 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3086 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3087 | return FALSE; |
252b5132 | 3088 | |
0c715baa AM |
3089 | /* If any dynamic relocs apply to a read-only section, |
3090 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3091 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3092 | elf_link_hash_traverse (&htab->elf, |
3093 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3094 | |
3095 | if ((info->flags & DF_TEXTREL) != 0) | |
3096 | { | |
3097 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3098 | return FALSE; |
0c715baa | 3099 | } |
252b5132 | 3100 | } |
23209a78 | 3101 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3102 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3103 | return FALSE; | |
252b5132 | 3104 | } |
dc810e39 | 3105 | #undef add_dynamic_entry |
252b5132 | 3106 | |
b34976b6 | 3107 | return TRUE; |
252b5132 RH |
3108 | } |
3109 | ||
67a4f2b7 AO |
3110 | static bfd_boolean |
3111 | elf_i386_always_size_sections (bfd *output_bfd, | |
3112 | struct bfd_link_info *info) | |
3113 | { | |
3114 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3115 | ||
3116 | if (tls_sec) | |
3117 | { | |
3118 | struct elf_link_hash_entry *tlsbase; | |
3119 | ||
3120 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3121 | "_TLS_MODULE_BASE_", | |
3122 | FALSE, FALSE, FALSE); | |
3123 | ||
3124 | if (tlsbase && tlsbase->type == STT_TLS) | |
3125 | { | |
4dfe6ac6 | 3126 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3127 | struct bfd_link_hash_entry *bh = NULL; |
3128 | const struct elf_backend_data *bed | |
3129 | = get_elf_backend_data (output_bfd); | |
3130 | ||
4dfe6ac6 NC |
3131 | htab = elf_i386_hash_table (info); |
3132 | if (htab == NULL) | |
3133 | return FALSE; | |
3134 | ||
67a4f2b7 AO |
3135 | if (!(_bfd_generic_link_add_one_symbol |
3136 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3137 | tls_sec, 0, NULL, FALSE, | |
3138 | bed->collect, &bh))) | |
3139 | return FALSE; | |
9f03412a | 3140 | |
4dfe6ac6 | 3141 | htab->tls_module_base = bh; |
9f03412a | 3142 | |
67a4f2b7 AO |
3143 | tlsbase = (struct elf_link_hash_entry *)bh; |
3144 | tlsbase->def_regular = 1; | |
3145 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3146 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3147 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3148 | } | |
3149 | } | |
3150 | ||
3151 | return TRUE; | |
3152 | } | |
3153 | ||
38701953 AM |
3154 | /* Set the correct type for an x86 ELF section. We do this by the |
3155 | section name, which is a hack, but ought to work. */ | |
3156 | ||
b34976b6 | 3157 | static bfd_boolean |
55fd94b0 AM |
3158 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3159 | Elf_Internal_Shdr *hdr, | |
3160 | asection *sec) | |
38701953 | 3161 | { |
91d6fa6a | 3162 | const char *name; |
38701953 AM |
3163 | |
3164 | name = bfd_get_section_name (abfd, sec); | |
3165 | ||
3166 | /* This is an ugly, but unfortunately necessary hack that is | |
3167 | needed when producing EFI binaries on x86. It tells | |
3168 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3169 | containing ELF relocation info. We need this hack in order to | |
3170 | be able to generate ELF binaries that can be translated into | |
3171 | EFI applications (which are essentially COFF objects). Those | |
3172 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3173 | which would normally cause BFD to segfault because it would | |
3174 | attempt to interpret this section as containing relocation | |
3175 | entries for section "oc". With this hack enabled, ".reloc" | |
3176 | will be treated as a normal data section, which will avoid the | |
3177 | segfault. However, you won't be able to create an ELFNN binary | |
3178 | with a section named "oc" that needs relocations, but that's | |
3179 | the kind of ugly side-effects you get when detecting section | |
3180 | types based on their names... In practice, this limitation is | |
3181 | unlikely to bite. */ | |
3182 | if (strcmp (name, ".reloc") == 0) | |
3183 | hdr->sh_type = SHT_PROGBITS; | |
3184 | ||
b34976b6 | 3185 | return TRUE; |
38701953 AM |
3186 | } |
3187 | ||
9f03412a AO |
3188 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3189 | executables. Rather than setting it to the beginning of the TLS | |
3190 | section, we have to set it to the end. This function may be called | |
3191 | multiple times, it is idempotent. */ | |
3192 | ||
3193 | static void | |
eb4ff4d6 | 3194 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3195 | { |
4dfe6ac6 | 3196 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3197 | struct bfd_link_hash_entry *base; |
3198 | ||
3199 | if (!info->executable) | |
3200 | return; | |
3201 | ||
4dfe6ac6 NC |
3202 | htab = elf_i386_hash_table (info); |
3203 | if (htab == NULL) | |
3204 | return; | |
9f03412a | 3205 | |
4dfe6ac6 NC |
3206 | base = htab->tls_module_base; |
3207 | if (base == NULL) | |
9f03412a AO |
3208 | return; |
3209 | ||
4dfe6ac6 | 3210 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3211 | } |
3212 | ||
13ae64f3 JJ |
3213 | /* Return the base VMA address which should be subtracted from real addresses |
3214 | when resolving @dtpoff relocation. | |
3215 | This is PT_TLS segment p_vaddr. */ | |
3216 | ||
3217 | static bfd_vma | |
eb4ff4d6 | 3218 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3219 | { |
e1918d23 AM |
3220 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3221 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3222 | return 0; |
e1918d23 | 3223 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3224 | } |
3225 | ||
3226 | /* Return the relocation value for @tpoff relocation | |
3227 | if STT_TLS virtual address is ADDRESS. */ | |
3228 | ||
3229 | static bfd_vma | |
eb4ff4d6 | 3230 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3231 | { |
e1918d23 | 3232 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3233 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3234 | bfd_vma static_tls_size; | |
13ae64f3 | 3235 | |
e1918d23 AM |
3236 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3237 | if (htab->tls_sec == NULL) | |
6a30718d | 3238 | return 0; |
7dc98aea RO |
3239 | |
3240 | /* Consider special static TLS alignment requirements. */ | |
3241 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3242 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3243 | } |
3244 | ||
252b5132 RH |
3245 | /* Relocate an i386 ELF section. */ |
3246 | ||
b34976b6 | 3247 | static bfd_boolean |
55fd94b0 AM |
3248 | elf_i386_relocate_section (bfd *output_bfd, |
3249 | struct bfd_link_info *info, | |
3250 | bfd *input_bfd, | |
3251 | asection *input_section, | |
3252 | bfd_byte *contents, | |
3253 | Elf_Internal_Rela *relocs, | |
3254 | Elf_Internal_Sym *local_syms, | |
3255 | asection **local_sections) | |
252b5132 | 3256 | { |
6725bdbf | 3257 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3258 | Elf_Internal_Shdr *symtab_hdr; |
3259 | struct elf_link_hash_entry **sym_hashes; | |
3260 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3261 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
3262 | Elf_Internal_Rela *rel; |
3263 | Elf_Internal_Rela *relend; | |
3348747a | 3264 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3265 | unsigned plt_entry_size; |
252b5132 | 3266 | |
0ffa91dd | 3267 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3268 | |
6725bdbf | 3269 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3270 | if (htab == NULL) |
3271 | return FALSE; | |
0ffa91dd | 3272 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3273 | sym_hashes = elf_sym_hashes (input_bfd); |
3274 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3275 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3276 | /* We have to handle relocations in vxworks .tls_vars sections |
3277 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 RM |
3278 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3279 | && info->shared | |
3348747a NS |
3280 | && !strcmp (input_section->output_section->name, |
3281 | ".tls_vars")); | |
252b5132 | 3282 | |
eb4ff4d6 | 3283 | elf_i386_set_tls_module_base (info); |
9f03412a | 3284 | |
25e762b9 RM |
3285 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3286 | ||
252b5132 RH |
3287 | rel = relocs; |
3288 | relend = relocs + input_section->reloc_count; | |
3289 | for (; rel < relend; rel++) | |
3290 | { | |
13ae64f3 | 3291 | unsigned int r_type; |
252b5132 RH |
3292 | reloc_howto_type *howto; |
3293 | unsigned long r_symndx; | |
3294 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3295 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3296 | Elf_Internal_Sym *sym; |
3297 | asection *sec; | |
dd7e64d4 | 3298 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3299 | bfd_vma relocation; |
b34976b6 | 3300 | bfd_boolean unresolved_reloc; |
252b5132 | 3301 | bfd_reloc_status_type r; |
1b452ec6 | 3302 | unsigned int indx; |
13ae64f3 | 3303 | int tls_type; |
1788fc08 | 3304 | bfd_vma st_size; |
dd7e64d4 | 3305 | asection *resolved_plt; |
252b5132 RH |
3306 | |
3307 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3308 | if (r_type == R_386_GNU_VTINHERIT |
3309 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 3310 | continue; |
dc47f327 | 3311 | |
55fd94b0 | 3312 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3313 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3314 | >= R_386_ext - R_386_standard) | |
3315 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
cbe950e9 | 3316 | >= R_386_irelative - R_386_ext)) |
252b5132 | 3317 | { |
6ba842b6 | 3318 | (*_bfd_error_handler) |
d003868e AM |
3319 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3320 | input_bfd, input_section, r_type); | |
252b5132 | 3321 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3322 | return FALSE; |
252b5132 | 3323 | } |
1b452ec6 | 3324 | howto = elf_howto_table + indx; |
252b5132 RH |
3325 | |
3326 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3327 | h = NULL; |
3328 | sym = NULL; | |
3329 | sec = NULL; | |
b34976b6 | 3330 | unresolved_reloc = FALSE; |
252b5132 RH |
3331 | if (r_symndx < symtab_hdr->sh_info) |
3332 | { | |
3333 | sym = local_syms + r_symndx; | |
3334 | sec = local_sections[r_symndx]; | |
3335 | relocation = (sec->output_section->vma | |
3336 | + sec->output_offset | |
3337 | + sym->st_value); | |
1788fc08 | 3338 | st_size = sym->st_size; |
ab96bf03 AM |
3339 | |
3340 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3341 | && ((sec->flags & SEC_MERGE) != 0 | |
3342 | || (info->relocatable | |
3343 | && sec->output_offset != 0))) | |
f8df10f4 | 3344 | { |
f8df10f4 | 3345 | bfd_vma addend; |
4a335f3d | 3346 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3347 | |
4a335f3d | 3348 | switch (howto->size) |
f8df10f4 | 3349 | { |
4a335f3d AM |
3350 | case 0: |
3351 | addend = bfd_get_8 (input_bfd, where); | |
3352 | if (howto->pc_relative) | |
3353 | { | |
3354 | addend = (addend ^ 0x80) - 0x80; | |
3355 | addend += 1; | |
3356 | } | |
3357 | break; | |
3358 | case 1: | |
3359 | addend = bfd_get_16 (input_bfd, where); | |
3360 | if (howto->pc_relative) | |
3361 | { | |
3362 | addend = (addend ^ 0x8000) - 0x8000; | |
3363 | addend += 2; | |
3364 | } | |
3365 | break; | |
3366 | case 2: | |
3367 | addend = bfd_get_32 (input_bfd, where); | |
3368 | if (howto->pc_relative) | |
3369 | { | |
3370 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3371 | addend += 4; | |
3372 | } | |
3373 | break; | |
3374 | default: | |
3375 | abort (); | |
f8df10f4 JJ |
3376 | } |
3377 | ||
ab96bf03 AM |
3378 | if (info->relocatable) |
3379 | addend += sec->output_offset; | |
3380 | else | |
3381 | { | |
3382 | asection *msec = sec; | |
3383 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3384 | addend); | |
3385 | addend -= relocation; | |
3386 | addend += msec->output_section->vma + msec->output_offset; | |
3387 | } | |
4a335f3d AM |
3388 | |
3389 | switch (howto->size) | |
3390 | { | |
3391 | case 0: | |
16a10388 | 3392 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3393 | if (howto->pc_relative) |
3394 | addend -= 1; | |
3395 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3396 | break; |
3397 | case 1: | |
3398 | if (howto->pc_relative) | |
3399 | addend -= 2; | |
3400 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3401 | break; |
3402 | case 2: | |
3403 | if (howto->pc_relative) | |
3404 | addend -= 4; | |
3405 | bfd_put_32 (input_bfd, addend, where); | |
3406 | break; | |
3407 | } | |
f8df10f4 | 3408 | } |
1f85278f L |
3409 | else if (!info->relocatable |
3410 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
c25bc9fc L |
3411 | { |
3412 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3413 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3414 | FALSE); | |
c25bc9fc L |
3415 | if (h == NULL) |
3416 | abort (); | |
3417 | ||
23209a78 | 3418 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3419 | h->root.u.def.value = sym->st_value; |
3420 | h->root.u.def.section = sec; | |
3421 | } | |
252b5132 RH |
3422 | } |
3423 | else | |
3424 | { | |
3d540e93 | 3425 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3426 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3427 | |
b2a8e766 AM |
3428 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3429 | r_symndx, symtab_hdr, sym_hashes, | |
3430 | h, sec, relocation, | |
62d887d4 | 3431 | unresolved_reloc, warned, ignored); |
1788fc08 | 3432 | st_size = h->size; |
252b5132 RH |
3433 | } |
3434 | ||
dbaa2011 | 3435 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3436 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3437 | rel, 1, relend, howto, 0, contents); |
9635fe29 | 3438 | |
ab96bf03 AM |
3439 | if (info->relocatable) |
3440 | continue; | |
3441 | ||
cbe950e9 L |
3442 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3443 | it here if it is defined in a non-shared object. */ | |
3444 | if (h != NULL | |
3445 | && h->type == STT_GNU_IFUNC | |
3446 | && h->def_regular) | |
3447 | { | |
3448 | asection *plt, *gotplt, *base_got; | |
3449 | bfd_vma plt_index; | |
4c544807 | 3450 | const char *name; |
cbe950e9 L |
3451 | |
3452 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3453 | || h->plt.offset == (bfd_vma) -1) | |
3454 | abort (); | |
3455 | ||
3456 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3457 | if (htab->elf.splt != NULL) |
cbe950e9 | 3458 | { |
6de2ae4a L |
3459 | plt = htab->elf.splt; |
3460 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3461 | } |
3462 | else | |
3463 | { | |
6de2ae4a L |
3464 | plt = htab->elf.iplt; |
3465 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3466 | } |
3467 | ||
3468 | relocation = (plt->output_section->vma | |
3469 | + plt->output_offset + h->plt.offset); | |
3470 | ||
3471 | switch (r_type) | |
3472 | { | |
3473 | default: | |
4c544807 L |
3474 | if (h->root.root.string) |
3475 | name = h->root.root.string; | |
3476 | else | |
3477 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3478 | NULL); | |
cbe950e9 L |
3479 | (*_bfd_error_handler) |
3480 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3481 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3482 | elf_howto_table[r_type].name, | |
4c544807 | 3483 | name, __FUNCTION__); |
cbe950e9 L |
3484 | bfd_set_error (bfd_error_bad_value); |
3485 | return FALSE; | |
3486 | ||
3487 | case R_386_32: | |
710ab287 | 3488 | /* Generate dynamic relcoation only when there is a |
c293fa49 | 3489 | non-GOT reference in a shared object. */ |
710ab287 L |
3490 | if (info->shared && h->non_got_ref) |
3491 | { | |
3492 | Elf_Internal_Rela outrel; | |
710ab287 L |
3493 | asection *sreloc; |
3494 | bfd_vma offset; | |
3495 | ||
c25bc9fc L |
3496 | /* Need a dynamic relocation to get the real function |
3497 | adddress. */ | |
710ab287 L |
3498 | offset = _bfd_elf_section_offset (output_bfd, |
3499 | info, | |
3500 | input_section, | |
3501 | rel->r_offset); | |
3502 | if (offset == (bfd_vma) -1 | |
3503 | || offset == (bfd_vma) -2) | |
3504 | abort (); | |
3505 | ||
3506 | outrel.r_offset = (input_section->output_section->vma | |
3507 | + input_section->output_offset | |
3508 | + offset); | |
3509 | ||
3510 | if (h->dynindx == -1 | |
44c4ea11 L |
3511 | || h->forced_local |
3512 | || info->executable) | |
710ab287 L |
3513 | { |
3514 | /* This symbol is resolved locally. */ | |
56b8aada L |
3515 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); |
3516 | bfd_put_32 (output_bfd, | |
3517 | (h->root.u.def.value | |
3518 | + h->root.u.def.section->output_section->vma | |
3519 | + h->root.u.def.section->output_offset), | |
3520 | contents + offset); | |
710ab287 L |
3521 | } |
3522 | else | |
56b8aada | 3523 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
710ab287 | 3524 | |
6de2ae4a | 3525 | sreloc = htab->elf.irelifunc; |
59d6ffb2 | 3526 | elf_append_rel (output_bfd, sreloc, &outrel); |
710ab287 L |
3527 | |
3528 | /* If this reloc is against an external symbol, we | |
3529 | do not want to fiddle with the addend. Otherwise, | |
3530 | we need to include the symbol value so that it | |
3531 | becomes an addend for the dynamic reloc. For an | |
3532 | internal symbol, we have updated addend. */ | |
56b8aada | 3533 | continue; |
710ab287 | 3534 | } |
d59a60e9 | 3535 | /* FALLTHROUGH */ |
cbe950e9 L |
3536 | case R_386_PC32: |
3537 | case R_386_PLT32: | |
3538 | goto do_relocation; | |
3539 | ||
3540 | case R_386_GOT32: | |
6de2ae4a | 3541 | base_got = htab->elf.sgot; |
cbe950e9 L |
3542 | off = h->got.offset; |
3543 | ||
7afd84dc | 3544 | if (base_got == NULL) |
cbe950e9 L |
3545 | abort (); |
3546 | ||
7afd84dc | 3547 | if (off == (bfd_vma) -1) |
cbe950e9 | 3548 | { |
7afd84dc L |
3549 | /* We can't use h->got.offset here to save state, or |
3550 | even just remember the offset, as finish_dynamic_symbol | |
3551 | would use that as offset into .got. */ | |
6bbec505 | 3552 | |
6de2ae4a | 3553 | if (htab->elf.splt != NULL) |
7afd84dc | 3554 | { |
25e762b9 | 3555 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3556 | off = (plt_index + 3) * 4; |
6de2ae4a | 3557 | base_got = htab->elf.sgotplt; |
7afd84dc | 3558 | } |
cbe950e9 L |
3559 | else |
3560 | { | |
25e762b9 | 3561 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3562 | off = plt_index * 4; |
6de2ae4a | 3563 | base_got = htab->elf.igotplt; |
7afd84dc L |
3564 | } |
3565 | ||
3566 | if (h->dynindx == -1 | |
3567 | || h->forced_local | |
3568 | || info->symbolic) | |
3569 | { | |
3570 | /* This references the local defitionion. We must | |
3571 | initialize this entry in the global offset table. | |
3572 | Since the offset must always be a multiple of 8, | |
3573 | we use the least significant bit to record | |
3574 | whether we have initialized it already. | |
3575 | ||
3576 | When doing a dynamic link, we create a .rela.got | |
3577 | relocation entry to initialize the value. This | |
3578 | is done in the finish_dynamic_symbol routine. */ | |
3579 | if ((off & 1) != 0) | |
3580 | off &= ~1; | |
3581 | else | |
3582 | { | |
3583 | bfd_put_32 (output_bfd, relocation, | |
3584 | base_got->contents + off); | |
3585 | h->got.offset |= 1; | |
3586 | } | |
cbe950e9 | 3587 | } |
cbe950e9 | 3588 | |
7afd84dc | 3589 | relocation = off; |
cbe950e9 | 3590 | |
7afd84dc | 3591 | /* Adjust for static executables. */ |
6de2ae4a | 3592 | if (htab->elf.splt == NULL) |
7afd84dc L |
3593 | relocation += gotplt->output_offset; |
3594 | } | |
3595 | else | |
0018b0a3 L |
3596 | { |
3597 | relocation = (base_got->output_section->vma | |
3598 | + base_got->output_offset + off | |
3599 | - gotplt->output_section->vma | |
3600 | - gotplt->output_offset); | |
3601 | /* Adjust for static executables. */ | |
6de2ae4a | 3602 | if (htab->elf.splt == NULL) |
0018b0a3 L |
3603 | relocation += gotplt->output_offset; |
3604 | } | |
3605 | ||
cbe950e9 L |
3606 | goto do_relocation; |
3607 | ||
3608 | case R_386_GOTOFF: | |
3609 | relocation -= (gotplt->output_section->vma | |
3610 | + gotplt->output_offset); | |
3611 | goto do_relocation; | |
3612 | } | |
3613 | } | |
3614 | ||
252b5132 RH |
3615 | switch (r_type) |
3616 | { | |
3617 | case R_386_GOT32: | |
3618 | /* Relocation is to the entry for this symbol in the global | |
3619 | offset table. */ | |
6de2ae4a | 3620 | if (htab->elf.sgot == NULL) |
ffb2e45b | 3621 | abort (); |
252b5132 RH |
3622 | |
3623 | if (h != NULL) | |
3624 | { | |
b34976b6 | 3625 | bfd_boolean dyn; |
252b5132 RH |
3626 | |
3627 | off = h->got.offset; | |
ebe50bae | 3628 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 3629 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 3630 | || (info->shared |
586119b3 | 3631 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3632 | || (ELF_ST_VISIBILITY (h->other) |
3633 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3634 | { |
3635 | /* This is actually a static link, or it is a | |
3636 | -Bsymbolic link and the symbol is defined | |
3637 | locally, or the symbol was forced to be local | |
3638 | because of a version file. We must initialize | |
3639 | this entry in the global offset table. Since the | |
3640 | offset must always be a multiple of 4, we use the | |
3641 | least significant bit to record whether we have | |
3642 | initialized it already. | |
3643 | ||
3644 | When doing a dynamic link, we create a .rel.got | |
3645 | relocation entry to initialize the value. This | |
3646 | is done in the finish_dynamic_symbol routine. */ | |
3647 | if ((off & 1) != 0) | |
3648 | off &= ~1; | |
3649 | else | |
3650 | { | |
3651 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 3652 | htab->elf.sgot->contents + off); |
252b5132 RH |
3653 | h->got.offset |= 1; |
3654 | } | |
3655 | } | |
8c694914 | 3656 | else |
b34976b6 | 3657 | unresolved_reloc = FALSE; |
252b5132 RH |
3658 | } |
3659 | else | |
3660 | { | |
ffb2e45b AM |
3661 | if (local_got_offsets == NULL) |
3662 | abort (); | |
252b5132 RH |
3663 | |
3664 | off = local_got_offsets[r_symndx]; | |
3665 | ||
3666 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3667 | the least significant bit to record whether we have |
3668 | already generated the necessary reloc. */ | |
252b5132 RH |
3669 | if ((off & 1) != 0) |
3670 | off &= ~1; | |
3671 | else | |
3672 | { | |
6725bdbf | 3673 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 3674 | htab->elf.sgot->contents + off); |
252b5132 RH |
3675 | |
3676 | if (info->shared) | |
3677 | { | |
947216bf AM |
3678 | asection *s; |
3679 | Elf_Internal_Rela outrel; | |
252b5132 | 3680 | |
6de2ae4a | 3681 | s = htab->elf.srelgot; |
947216bf | 3682 | if (s == NULL) |
ffb2e45b | 3683 | abort (); |
252b5132 | 3684 | |
6de2ae4a L |
3685 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3686 | + htab->elf.sgot->output_offset | |
252b5132 RH |
3687 | + off); |
3688 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 3689 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
3690 | } |
3691 | ||
3692 | local_got_offsets[r_symndx] |= 1; | |
3693 | } | |
252b5132 RH |
3694 | } |
3695 | ||
ffb2e45b AM |
3696 | if (off >= (bfd_vma) -2) |
3697 | abort (); | |
3698 | ||
6de2ae4a L |
3699 | relocation = htab->elf.sgot->output_section->vma |
3700 | + htab->elf.sgot->output_offset + off | |
3701 | - htab->elf.sgotplt->output_section->vma | |
3702 | - htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3703 | break; |
3704 | ||
3705 | case R_386_GOTOFF: | |
3706 | /* Relocation is relative to the start of the global offset | |
3707 | table. */ | |
3708 | ||
90f487df L |
3709 | /* Check to make sure it isn't a protected function symbol |
3710 | for shared library since it may not be local when used | |
41bed6dd L |
3711 | as function address. We also need to make sure that a |
3712 | symbol is defined locally. */ | |
3713 | if (info->shared && h) | |
90f487df | 3714 | { |
41bed6dd L |
3715 | if (!h->def_regular) |
3716 | { | |
3717 | const char *v; | |
3718 | ||
3719 | switch (ELF_ST_VISIBILITY (h->other)) | |
3720 | { | |
3721 | case STV_HIDDEN: | |
3722 | v = _("hidden symbol"); | |
3723 | break; | |
3724 | case STV_INTERNAL: | |
3725 | v = _("internal symbol"); | |
3726 | break; | |
3727 | case STV_PROTECTED: | |
3728 | v = _("protected symbol"); | |
3729 | break; | |
3730 | default: | |
3731 | v = _("symbol"); | |
3732 | break; | |
3733 | } | |
3734 | ||
3735 | (*_bfd_error_handler) | |
3736 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
3737 | input_bfd, v, h->root.root.string); | |
3738 | bfd_set_error (bfd_error_bad_value); | |
3739 | return FALSE; | |
3740 | } | |
3741 | else if (!info->executable | |
bdb892b9 | 3742 | && !SYMBOLIC_BIND (info, h) |
41bed6dd L |
3743 | && h->type == STT_FUNC |
3744 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3745 | { | |
3746 | (*_bfd_error_handler) | |
3747 | (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"), | |
3748 | input_bfd, h->root.root.string); | |
3749 | bfd_set_error (bfd_error_bad_value); | |
3750 | return FALSE; | |
3751 | } | |
90f487df L |
3752 | } |
3753 | ||
8c37241b JJ |
3754 | /* Note that sgot is not involved in this |
3755 | calculation. We always want the start of .got.plt. If we | |
3756 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3757 | permitted by the ABI, we might have to change this |
3758 | calculation. */ | |
6de2ae4a L |
3759 | relocation -= htab->elf.sgotplt->output_section->vma |
3760 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3761 | break; |
3762 | ||
3763 | case R_386_GOTPC: | |
3764 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
3765 | relocation = htab->elf.sgotplt->output_section->vma |
3766 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 3767 | unresolved_reloc = FALSE; |
252b5132 RH |
3768 | break; |
3769 | ||
3770 | case R_386_PLT32: | |
3771 | /* Relocation is to the entry for this symbol in the | |
3772 | procedure linkage table. */ | |
3773 | ||
dd5724d5 | 3774 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3775 | without using the procedure linkage table. */ |
252b5132 RH |
3776 | if (h == NULL) |
3777 | break; | |
3778 | ||
dd7e64d4 L |
3779 | eh = (struct elf_i386_link_hash_entry *) h; |
3780 | if ((h->plt.offset == (bfd_vma) -1 | |
3781 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 3782 | || htab->elf.splt == NULL) |
252b5132 RH |
3783 | { |
3784 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3785 | happens when statically linking PIC code, or when |
3786 | using -Bsymbolic. */ | |
252b5132 RH |
3787 | break; |
3788 | } | |
3789 | ||
dd7e64d4 L |
3790 | if (h->plt.offset != (bfd_vma) -1) |
3791 | { | |
3792 | resolved_plt = htab->elf.splt; | |
3793 | plt_offset = h->plt.offset; | |
3794 | } | |
3795 | else | |
3796 | { | |
3797 | resolved_plt = htab->plt_got; | |
3798 | plt_offset = eh->plt_got.offset; | |
3799 | } | |
3800 | ||
3801 | relocation = (resolved_plt->output_section->vma | |
3802 | + resolved_plt->output_offset | |
3803 | + plt_offset); | |
b34976b6 | 3804 | unresolved_reloc = FALSE; |
252b5132 RH |
3805 | break; |
3806 | ||
1788fc08 | 3807 | case R_386_SIZE32: |
1788fc08 L |
3808 | /* Set to symbol size. */ |
3809 | relocation = st_size; | |
3810 | /* Fall through. */ | |
3811 | ||
252b5132 RH |
3812 | case R_386_32: |
3813 | case R_386_PC32: | |
3348747a NS |
3814 | if ((input_section->flags & SEC_ALLOC) == 0 |
3815 | || is_vxworks_tls) | |
ec338859 AM |
3816 | break; |
3817 | ||
12d0ee4a | 3818 | if ((info->shared |
ef5aade5 L |
3819 | && (h == NULL |
3820 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3821 | || h->root.type != bfd_link_hash_undefweak) | |
1788fc08 | 3822 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 3823 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
3824 | || (ELIMINATE_COPY_RELOCS |
3825 | && !info->shared | |
12d0ee4a AM |
3826 | && h != NULL |
3827 | && h->dynindx != -1 | |
f5385ebf AM |
3828 | && !h->non_got_ref |
3829 | && ((h->def_dynamic | |
3830 | && !h->def_regular) | |
28d0b90e | 3831 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3832 | || h->root.type == bfd_link_hash_undefined))) |
252b5132 | 3833 | { |
947216bf | 3834 | Elf_Internal_Rela outrel; |
b34976b6 | 3835 | bfd_boolean skip, relocate; |
0c715baa | 3836 | asection *sreloc; |
252b5132 RH |
3837 | |
3838 | /* When generating a shared object, these relocations | |
3839 | are copied into the output file to be resolved at run | |
3840 | time. */ | |
3841 | ||
b34976b6 AM |
3842 | skip = FALSE; |
3843 | relocate = FALSE; | |
252b5132 | 3844 | |
c629eae0 JJ |
3845 | outrel.r_offset = |
3846 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3847 | rel->r_offset); | |
3848 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 3849 | skip = TRUE; |
0bb2d96a | 3850 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3851 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
3852 | outrel.r_offset += (input_section->output_section->vma |
3853 | + input_section->output_offset); | |
3854 | ||
3855 | if (skip) | |
0bb2d96a | 3856 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
3857 | else if (h != NULL |
3858 | && h->dynindx != -1 | |
3859 | && (r_type == R_386_PC32 | |
3860 | || !info->shared | |
55255dae | 3861 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 3862 | || !h->def_regular)) |
0bb2d96a | 3863 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
3864 | else |
3865 | { | |
5a15f56f | 3866 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 3867 | relocate = TRUE; |
5a15f56f | 3868 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
3869 | } |
3870 | ||
cbe950e9 | 3871 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 3872 | |
62d78908 L |
3873 | if (sreloc == NULL || sreloc->contents == NULL) |
3874 | { | |
3875 | r = bfd_reloc_notsupported; | |
3876 | goto check_relocation_error; | |
3877 | } | |
0c715baa | 3878 | |
59d6ffb2 | 3879 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
3880 | |
3881 | /* If this reloc is against an external symbol, we do | |
3882 | not want to fiddle with the addend. Otherwise, we | |
3883 | need to include the symbol value so that it becomes | |
3884 | an addend for the dynamic reloc. */ | |
0f88be7a | 3885 | if (! relocate) |
252b5132 RH |
3886 | continue; |
3887 | } | |
252b5132 RH |
3888 | break; |
3889 | ||
37e55690 | 3890 | case R_386_TLS_IE: |
1d85728f | 3891 | if (!info->executable) |
37e55690 | 3892 | { |
947216bf | 3893 | Elf_Internal_Rela outrel; |
37e55690 | 3894 | asection *sreloc; |
37e55690 JJ |
3895 | |
3896 | outrel.r_offset = rel->r_offset | |
3897 | + input_section->output_section->vma | |
3898 | + input_section->output_offset; | |
3899 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3900 | sreloc = elf_section_data (input_section)->sreloc; | |
3901 | if (sreloc == NULL) | |
3902 | abort (); | |
59d6ffb2 | 3903 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3904 | } |
3905 | /* Fall through */ | |
3906 | ||
13ae64f3 | 3907 | case R_386_TLS_GD: |
67a4f2b7 AO |
3908 | case R_386_TLS_GOTDESC: |
3909 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 3910 | case R_386_TLS_IE_32: |
37e55690 | 3911 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
3912 | tls_type = GOT_UNKNOWN; |
3913 | if (h == NULL && local_got_offsets) | |
3914 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
3915 | else if (h != NULL) | |
142411ca | 3916 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
3917 | if (tls_type == GOT_TLS_IE) |
3918 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
3919 | |
3920 | if (! elf_i386_tls_transition (info, input_bfd, | |
3921 | input_section, contents, | |
3922 | symtab_hdr, sym_hashes, | |
3923 | &r_type, tls_type, rel, | |
4c544807 | 3924 | relend, h, r_symndx)) |
142411ca | 3925 | return FALSE; |
13ae64f3 JJ |
3926 | |
3927 | if (r_type == R_386_TLS_LE_32) | |
3928 | { | |
82e51918 | 3929 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3930 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
3931 | { | |
142411ca | 3932 | unsigned int type; |
13ae64f3 JJ |
3933 | bfd_vma roff; |
3934 | ||
3935 | /* GD->LE transition. */ | |
13ae64f3 | 3936 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3937 | if (type == 0x04) |
3938 | { | |
3939 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3940 | Change it into: | |
3941 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3942 | (6 byte form of subl). */ | |
13ae64f3 JJ |
3943 | memcpy (contents + rel->r_offset - 3, |
3944 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 3945 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
3946 | } |
3947 | else | |
3948 | { | |
142411ca L |
3949 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
3950 | Change it into: | |
3951 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3952 | (6 byte form of subl). */ | |
3953 | memcpy (contents + rel->r_offset - 2, | |
3954 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
3955 | roff = rel->r_offset + 6; | |
13ae64f3 | 3956 | } |
eb4ff4d6 | 3957 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 3958 | contents + roff); |
a3fadc9a | 3959 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
3960 | rel++; |
3961 | continue; | |
3962 | } | |
67a4f2b7 AO |
3963 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3964 | { | |
3965 | /* GDesc -> LE transition. | |
3966 | It's originally something like: | |
3967 | leal x@tlsdesc(%ebx), %eax | |
3968 | ||
3969 | leal x@ntpoff, %eax | |
3970 | ||
3971 | Registers other than %eax may be set up here. */ | |
3972 | ||
142411ca | 3973 | unsigned int val; |
67a4f2b7 AO |
3974 | bfd_vma roff; |
3975 | ||
67a4f2b7 | 3976 | roff = rel->r_offset; |
67a4f2b7 | 3977 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3978 | |
3979 | /* Now modify the instruction as appropriate. */ | |
3980 | /* aoliva FIXME: remove the above and xor the byte | |
3981 | below with 0x86. */ | |
3982 | bfd_put_8 (output_bfd, val ^ 0x86, | |
3983 | contents + roff - 1); | |
eb4ff4d6 | 3984 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
3985 | contents + roff); |
3986 | continue; | |
3987 | } | |
3988 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
3989 | { | |
3990 | /* GDesc -> LE transition. | |
3991 | It's originally: | |
3992 | call *(%eax) | |
3993 | Turn it into: | |
142411ca | 3994 | xchg %ax,%ax */ |
67a4f2b7 | 3995 | |
67a4f2b7 | 3996 | bfd_vma roff; |
6bbec505 | 3997 | |
67a4f2b7 | 3998 | roff = rel->r_offset; |
10efb593 | 3999 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4000 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4001 | continue; | |
4002 | } | |
37e55690 | 4003 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4004 | { |
142411ca | 4005 | unsigned int val; |
13ae64f3 JJ |
4006 | |
4007 | /* IE->LE transition: | |
37e55690 JJ |
4008 | Originally it can be one of: |
4009 | movl foo, %eax | |
4010 | movl foo, %reg | |
4011 | addl foo, %reg | |
4012 | We change it into: | |
4013 | movl $foo, %eax | |
4014 | movl $foo, %reg | |
4015 | addl $foo, %reg. */ | |
37e55690 | 4016 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4017 | if (val == 0xa1) |
4018 | { | |
4019 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4020 | bfd_put_8 (output_bfd, 0xb8, |
4021 | contents + rel->r_offset - 1); | |
37e55690 | 4022 | } |
299bf759 | 4023 | else |
37e55690 | 4024 | { |
142411ca L |
4025 | unsigned int type; |
4026 | ||
55fd94b0 AM |
4027 | type = bfd_get_8 (input_bfd, |
4028 | contents + rel->r_offset - 2); | |
299bf759 | 4029 | switch (type) |
26e41594 | 4030 | { |
299bf759 L |
4031 | case 0x8b: |
4032 | /* movl */ | |
299bf759 L |
4033 | bfd_put_8 (output_bfd, 0xc7, |
4034 | contents + rel->r_offset - 2); | |
4035 | bfd_put_8 (output_bfd, | |
4036 | 0xc0 | ((val >> 3) & 7), | |
4037 | contents + rel->r_offset - 1); | |
4038 | break; | |
4039 | case 0x03: | |
4040 | /* addl */ | |
299bf759 L |
4041 | bfd_put_8 (output_bfd, 0x81, |
4042 | contents + rel->r_offset - 2); | |
4043 | bfd_put_8 (output_bfd, | |
4044 | 0xc0 | ((val >> 3) & 7), | |
4045 | contents + rel->r_offset - 1); | |
4046 | break; | |
4047 | default: | |
4048 | BFD_FAIL (); | |
4049 | break; | |
26e41594 | 4050 | } |
37e55690 | 4051 | } |
eb4ff4d6 | 4052 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4053 | contents + rel->r_offset); |
4054 | continue; | |
4055 | } | |
4056 | else | |
4057 | { | |
4058 | unsigned int val, type; | |
4059 | ||
4060 | /* {IE_32,GOTIE}->LE transition: | |
4061 | Originally it can be one of: | |
13ae64f3 | 4062 | subl foo(%reg1), %reg2 |
13ae64f3 | 4063 | movl foo(%reg1), %reg2 |
37e55690 | 4064 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4065 | We change it into: |
4066 | subl $foo, %reg2 | |
37e55690 JJ |
4067 | movl $foo, %reg2 (6 byte form) |
4068 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4069 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4070 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4071 | if (type == 0x8b) |
4072 | { | |
4073 | /* movl */ | |
13ae64f3 JJ |
4074 | bfd_put_8 (output_bfd, 0xc7, |
4075 | contents + rel->r_offset - 2); | |
4076 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4077 | contents + rel->r_offset - 1); | |
4078 | } | |
4079 | else if (type == 0x2b) | |
4080 | { | |
4081 | /* subl */ | |
13ae64f3 JJ |
4082 | bfd_put_8 (output_bfd, 0x81, |
4083 | contents + rel->r_offset - 2); | |
4084 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4085 | contents + rel->r_offset - 1); | |
4086 | } | |
37e55690 JJ |
4087 | else if (type == 0x03) |
4088 | { | |
4089 | /* addl */ | |
4090 | bfd_put_8 (output_bfd, 0x81, | |
4091 | contents + rel->r_offset - 2); | |
4092 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4093 | contents + rel->r_offset - 1); | |
4094 | } | |
13ae64f3 JJ |
4095 | else |
4096 | BFD_FAIL (); | |
37e55690 | 4097 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4098 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4099 | contents + rel->r_offset); |
4100 | else | |
eb4ff4d6 | 4101 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4102 | contents + rel->r_offset); |
13ae64f3 JJ |
4103 | continue; |
4104 | } | |
4105 | } | |
4106 | ||
6de2ae4a | 4107 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4108 | abort (); |
4109 | ||
4110 | if (h != NULL) | |
67a4f2b7 AO |
4111 | { |
4112 | off = h->got.offset; | |
4113 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4114 | } | |
13ae64f3 JJ |
4115 | else |
4116 | { | |
4117 | if (local_got_offsets == NULL) | |
4118 | abort (); | |
4119 | ||
4120 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4121 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4122 | } |
4123 | ||
4124 | if ((off & 1) != 0) | |
4125 | off &= ~1; | |
26e41594 | 4126 | else |
13ae64f3 | 4127 | { |
947216bf | 4128 | Elf_Internal_Rela outrel; |
91d6fa6a | 4129 | int dr_type; |
67a4f2b7 | 4130 | asection *sreloc; |
13ae64f3 | 4131 | |
6de2ae4a | 4132 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4133 | abort (); |
4134 | ||
67a4f2b7 AO |
4135 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4136 | ||
4137 | if (GOT_TLS_GDESC_P (tls_type)) | |
4138 | { | |
59d6ffb2 | 4139 | bfd_byte *loc; |
67a4f2b7 AO |
4140 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4141 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4142 | <= htab->elf.sgotplt->size); |
4143 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4144 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4145 | + offplt |
4146 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4147 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4148 | loc = sreloc->contents; |
5ae0bfb6 RS |
4149 | loc += (htab->next_tls_desc_index++ |
4150 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4151 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4152 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4153 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4154 | if (indx == 0) | |
4155 | { | |
4156 | BFD_ASSERT (! unresolved_reloc); | |
4157 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4158 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4159 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4160 | + htab->sgotplt_jump_table_size + 4); |
4161 | } | |
4162 | else | |
4163 | { | |
4164 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4165 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4166 | + htab->sgotplt_jump_table_size + 4); |
4167 | } | |
4168 | } | |
4169 | ||
6de2ae4a | 4170 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4171 | |
6de2ae4a L |
4172 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4173 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4174 | |
67a4f2b7 | 4175 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4176 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4177 | else if (GOT_TLS_GDESC_P (tls_type)) |
4178 | goto dr_done; | |
37e55690 JJ |
4179 | else if (tls_type == GOT_TLS_IE_POS) |
4180 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4181 | else |
4182 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4183 | |
37e55690 | 4184 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4185 | bfd_put_32 (output_bfd, |
4186 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4187 | htab->elf.sgot->contents + off); |
37e55690 | 4188 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4189 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4190 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4191 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4192 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4193 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4194 | htab->elf.sgot->contents + off); |
13ae64f3 | 4195 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4196 | |
59d6ffb2 | 4197 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4198 | |
67a4f2b7 | 4199 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4200 | { |
4201 | if (indx == 0) | |
4202 | { | |
82e51918 | 4203 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4204 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4205 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4206 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4207 | } |
4208 | else | |
4209 | { | |
4210 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4211 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4212 | outrel.r_info = ELF32_R_INFO (indx, |
4213 | R_386_TLS_DTPOFF32); | |
4214 | outrel.r_offset += 4; | |
59d6ffb2 | 4215 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4216 | } |
4217 | } | |
37e55690 JJ |
4218 | else if (tls_type == GOT_TLS_IE_BOTH) |
4219 | { | |
4220 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4221 | (indx == 0 |
4222 | ? relocation - elf_i386_dtpoff_base (info) | |
4223 | : 0), | |
6de2ae4a | 4224 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4225 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4226 | outrel.r_offset += 4; | |
59d6ffb2 | 4227 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4228 | } |
13ae64f3 | 4229 | |
67a4f2b7 | 4230 | dr_done: |
13ae64f3 JJ |
4231 | if (h != NULL) |
4232 | h->got.offset |= 1; | |
4233 | else | |
4234 | local_got_offsets[r_symndx] |= 1; | |
4235 | } | |
4236 | ||
67a4f2b7 AO |
4237 | if (off >= (bfd_vma) -2 |
4238 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4239 | abort (); |
67a4f2b7 AO |
4240 | if (r_type == R_386_TLS_GOTDESC |
4241 | || r_type == R_386_TLS_DESC_CALL) | |
4242 | { | |
4243 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4244 | unresolved_reloc = FALSE; | |
4245 | } | |
4246 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4247 | { |
6de2ae4a L |
4248 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4249 | + htab->elf.sgotplt->output_offset; | |
4250 | relocation = htab->elf.sgot->output_section->vma | |
4251 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4252 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4253 | && tls_type == GOT_TLS_IE_BOTH) | |
4254 | relocation += 4; | |
4255 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4256 | relocation += g_o_t; |
b34976b6 | 4257 | unresolved_reloc = FALSE; |
13ae64f3 | 4258 | } |
67a4f2b7 | 4259 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4260 | { |
4261 | unsigned int val, type; | |
4262 | bfd_vma roff; | |
4263 | ||
4264 | /* GD->IE transition. */ | |
13ae64f3 | 4265 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4266 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
4267 | if (type == 0x04) | |
4268 | { | |
4269 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4270 | Change it into: | |
4271 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 4272 | val >>= 3; |
142411ca | 4273 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4274 | } |
4275 | else | |
4276 | { | |
4277 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
4278 | Change it into: | |
4279 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4280 | roff = rel->r_offset - 2; |
4281 | } | |
4282 | memcpy (contents + roff, | |
4283 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4284 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4285 | /* If foo is used only with foo@gotntpoff(%reg) and |
4286 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4287 | subl $foo@gottpoff(%reg), %eax | |
4288 | into: | |
4289 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4290 | if (tls_type == GOT_TLS_IE_POS) |
4291 | contents[roff + 6] = 0x03; | |
8c37241b | 4292 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4293 | htab->elf.sgot->output_section->vma |
4294 | + htab->elf.sgot->output_offset + off | |
4295 | - htab->elf.sgotplt->output_section->vma | |
4296 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 JJ |
4297 | contents + roff + 8); |
4298 | /* Skip R_386_PLT32. */ | |
4299 | rel++; | |
4300 | continue; | |
4301 | } | |
67a4f2b7 AO |
4302 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4303 | { | |
4304 | /* GDesc -> IE transition. | |
4305 | It's originally something like: | |
4306 | leal x@tlsdesc(%ebx), %eax | |
4307 | ||
4308 | Change it to: | |
142411ca | 4309 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4310 | or: |
4311 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4312 | ||
4313 | Registers other than %eax may be set up here. */ | |
4314 | ||
67a4f2b7 AO |
4315 | bfd_vma roff; |
4316 | ||
4317 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4318 | offset into any register, although it's probably | |
4319 | almost always going to be eax. */ | |
4320 | roff = rel->r_offset; | |
67a4f2b7 AO |
4321 | |
4322 | /* Now modify the instruction as appropriate. */ | |
4323 | /* To turn a leal into a movl in the form we use it, it | |
4324 | suffices to change the first byte from 0x8d to 0x8b. | |
4325 | aoliva FIXME: should we decide to keep the leal, all | |
4326 | we have to do is remove the statement below, and | |
4327 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4328 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4329 | ||
4330 | if (tls_type == GOT_TLS_IE_BOTH) | |
4331 | off += 4; | |
4332 | ||
4333 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4334 | htab->elf.sgot->output_section->vma |
4335 | + htab->elf.sgot->output_offset + off | |
4336 | - htab->elf.sgotplt->output_section->vma | |
4337 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4338 | contents + roff); |
4339 | continue; | |
4340 | } | |
4341 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4342 | { | |
4343 | /* GDesc -> IE transition. | |
4344 | It's originally: | |
4345 | call *(%eax) | |
4346 | ||
4347 | Change it to: | |
142411ca | 4348 | xchg %ax,%ax |
67a4f2b7 AO |
4349 | or |
4350 | negl %eax | |
4351 | depending on how we transformed the TLS_GOTDESC above. | |
4352 | */ | |
4353 | ||
67a4f2b7 AO |
4354 | bfd_vma roff; |
4355 | ||
67a4f2b7 | 4356 | roff = rel->r_offset; |
67a4f2b7 AO |
4357 | |
4358 | /* Now modify the instruction as appropriate. */ | |
4359 | if (tls_type != GOT_TLS_IE_NEG) | |
4360 | { | |
10efb593 L |
4361 | /* xchg %ax,%ax */ |
4362 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4363 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4364 | } | |
4365 | else | |
4366 | { | |
4367 | /* negl %eax */ | |
4368 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4369 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4370 | } | |
4371 | ||
4372 | continue; | |
4373 | } | |
4374 | else | |
4375 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4376 | break; |
4377 | ||
4378 | case R_386_TLS_LDM: | |
142411ca L |
4379 | if (! elf_i386_tls_transition (info, input_bfd, |
4380 | input_section, contents, | |
4381 | symtab_hdr, sym_hashes, | |
4382 | &r_type, GOT_UNKNOWN, rel, | |
4c544807 | 4383 | relend, h, r_symndx)) |
142411ca | 4384 | return FALSE; |
13ae64f3 | 4385 | |
142411ca L |
4386 | if (r_type != R_386_TLS_LDM) |
4387 | { | |
13ae64f3 | 4388 | /* LD->LE transition: |
13ae64f3 JJ |
4389 | leal foo(%reg), %eax; call ___tls_get_addr. |
4390 | We change it into: | |
4391 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4392 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4393 | memcpy (contents + rel->r_offset - 2, |
4394 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4395 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
4396 | rel++; |
4397 | continue; | |
4398 | } | |
4399 | ||
6de2ae4a | 4400 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4401 | abort (); |
4402 | ||
4403 | off = htab->tls_ldm_got.offset; | |
4404 | if (off & 1) | |
4405 | off &= ~1; | |
4406 | else | |
4407 | { | |
947216bf | 4408 | Elf_Internal_Rela outrel; |
13ae64f3 | 4409 | |
6de2ae4a | 4410 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4411 | abort (); |
4412 | ||
6de2ae4a L |
4413 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4414 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4415 | |
4416 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4417 | htab->elf.sgot->contents + off); |
13ae64f3 | 4418 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4419 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4420 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 4421 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
4422 | htab->tls_ldm_got.offset |= 1; |
4423 | } | |
6de2ae4a L |
4424 | relocation = htab->elf.sgot->output_section->vma |
4425 | + htab->elf.sgot->output_offset + off | |
4426 | - htab->elf.sgotplt->output_section->vma | |
4427 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 4428 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4429 | break; |
4430 | ||
4431 | case R_386_TLS_LDO_32: | |
959b0961 | 4432 | if (!info->executable || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 4433 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
4434 | else |
4435 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4436 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4437 | break; |
4438 | ||
4439 | case R_386_TLS_LE_32: | |
13ae64f3 | 4440 | case R_386_TLS_LE: |
1d85728f | 4441 | if (!info->executable) |
37e55690 | 4442 | { |
947216bf | 4443 | Elf_Internal_Rela outrel; |
37e55690 | 4444 | asection *sreloc; |
37e55690 JJ |
4445 | |
4446 | outrel.r_offset = rel->r_offset | |
4447 | + input_section->output_section->vma | |
4448 | + input_section->output_offset; | |
4449 | if (h != NULL && h->dynindx != -1) | |
4450 | indx = h->dynindx; | |
4451 | else | |
4452 | indx = 0; | |
4453 | if (r_type == R_386_TLS_LE_32) | |
4454 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4455 | else | |
4456 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4457 | sreloc = elf_section_data (input_section)->sreloc; | |
4458 | if (sreloc == NULL) | |
4459 | abort (); | |
59d6ffb2 | 4460 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4461 | if (indx) |
4462 | continue; | |
4463 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4464 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 4465 | else |
eb4ff4d6 | 4466 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
4467 | } |
4468 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4469 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4470 | else |
eb4ff4d6 | 4471 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4472 | break; |
4473 | ||
252b5132 RH |
4474 | default: |
4475 | break; | |
4476 | } | |
4477 | ||
239e1f3a AM |
4478 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4479 | because such sections are not SEC_ALLOC and thus ld.so will | |
4480 | not process them. */ | |
8c694914 | 4481 | if (unresolved_reloc |
239e1f3a | 4482 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4483 | && h->def_dynamic) |
4484 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4485 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
4486 | { |
4487 | (*_bfd_error_handler) | |
843fe662 | 4488 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4489 | input_bfd, |
4490 | input_section, | |
6a30718d | 4491 | (long) rel->r_offset, |
843fe662 | 4492 | howto->name, |
6a30718d | 4493 | h->root.root.string); |
b34976b6 | 4494 | return FALSE; |
6a30718d | 4495 | } |
83be169b | 4496 | |
cbe950e9 | 4497 | do_relocation: |
252b5132 RH |
4498 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4499 | contents, rel->r_offset, | |
55fd94b0 | 4500 | relocation, 0); |
252b5132 | 4501 | |
62d78908 | 4502 | check_relocation_error: |
cf5c0c5b | 4503 | if (r != bfd_reloc_ok) |
252b5132 | 4504 | { |
cf5c0c5b | 4505 | const char *name; |
ffb2e45b | 4506 | |
cf5c0c5b AM |
4507 | if (h != NULL) |
4508 | name = h->root.root.string; | |
4509 | else | |
4510 | { | |
4511 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4512 | symtab_hdr->sh_link, | |
4513 | sym->st_name); | |
4514 | if (name == NULL) | |
b34976b6 | 4515 | return FALSE; |
cf5c0c5b AM |
4516 | if (*name == '\0') |
4517 | name = bfd_section_name (input_bfd, sec); | |
4518 | } | |
ffb2e45b | 4519 | |
cf5c0c5b AM |
4520 | if (r == bfd_reloc_overflow) |
4521 | { | |
cf5c0c5b | 4522 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4523 | (info, (h ? &h->root : NULL), name, howto->name, |
4524 | (bfd_vma) 0, input_bfd, input_section, | |
4525 | rel->r_offset))) | |
b34976b6 | 4526 | return FALSE; |
cf5c0c5b AM |
4527 | } |
4528 | else | |
4529 | { | |
4530 | (*_bfd_error_handler) | |
d003868e AM |
4531 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4532 | input_bfd, input_section, | |
cf5c0c5b | 4533 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4534 | return FALSE; |
cf5c0c5b | 4535 | } |
252b5132 RH |
4536 | } |
4537 | } | |
4538 | ||
b34976b6 | 4539 | return TRUE; |
252b5132 RH |
4540 | } |
4541 | ||
4542 | /* Finish up dynamic symbol handling. We set the contents of various | |
4543 | dynamic sections here. */ | |
4544 | ||
b34976b6 | 4545 | static bfd_boolean |
55fd94b0 AM |
4546 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4547 | struct bfd_link_info *info, | |
4548 | struct elf_link_hash_entry *h, | |
4549 | Elf_Internal_Sym *sym) | |
252b5132 | 4550 | { |
6725bdbf | 4551 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
4552 | unsigned plt_entry_size; |
4553 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 4554 | struct elf_i386_link_hash_entry *eh; |
252b5132 | 4555 | |
6725bdbf | 4556 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4557 | if (htab == NULL) |
4558 | return FALSE; | |
252b5132 | 4559 | |
25e762b9 RM |
4560 | abed = get_elf_i386_backend_data (output_bfd); |
4561 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
4562 | ||
dd7e64d4 L |
4563 | eh = (struct elf_i386_link_hash_entry *) h; |
4564 | ||
252b5132 RH |
4565 | if (h->plt.offset != (bfd_vma) -1) |
4566 | { | |
252b5132 RH |
4567 | bfd_vma plt_index; |
4568 | bfd_vma got_offset; | |
947216bf AM |
4569 | Elf_Internal_Rela rel; |
4570 | bfd_byte *loc; | |
cbe950e9 L |
4571 | asection *plt, *gotplt, *relplt; |
4572 | ||
4573 | /* When building a static executable, use .iplt, .igot.plt and | |
4574 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4575 | if (htab->elf.splt != NULL) |
cbe950e9 | 4576 | { |
6de2ae4a L |
4577 | plt = htab->elf.splt; |
4578 | gotplt = htab->elf.sgotplt; | |
4579 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4580 | } |
4581 | else | |
4582 | { | |
6de2ae4a L |
4583 | plt = htab->elf.iplt; |
4584 | gotplt = htab->elf.igotplt; | |
4585 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4586 | } |
252b5132 RH |
4587 | |
4588 | /* This symbol has an entry in the procedure linkage table. Set | |
4589 | it up. */ | |
4590 | ||
cbe950e9 L |
4591 | if ((h->dynindx == -1 |
4592 | && !((h->forced_local || info->executable) | |
4593 | && h->def_regular | |
4594 | && h->type == STT_GNU_IFUNC)) | |
4595 | || plt == NULL | |
4596 | || gotplt == NULL | |
4597 | || relplt == NULL) | |
cec7f46a | 4598 | abort (); |
252b5132 RH |
4599 | |
4600 | /* Get the index in the procedure linkage table which | |
4601 | corresponds to this symbol. This is the index of this symbol | |
4602 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4603 | first entry in the procedure linkage table is reserved. |
252b5132 | 4604 | |
cbe950e9 | 4605 | Get the offset into the .got table of the entry that |
252b5132 | 4606 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 4607 | The first three are reserved. |
6bbec505 | 4608 | |
cbe950e9 L |
4609 | For static executables, we don't reserve anything. */ |
4610 | ||
6de2ae4a | 4611 | if (plt == htab->elf.splt) |
cbe950e9 | 4612 | { |
e1f98742 L |
4613 | got_offset = h->plt.offset / plt_entry_size - 1; |
4614 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
4615 | } |
4616 | else | |
4617 | { | |
e1f98742 L |
4618 | got_offset = h->plt.offset / plt_entry_size; |
4619 | got_offset = got_offset * 4; | |
cbe950e9 | 4620 | } |
252b5132 RH |
4621 | |
4622 | /* Fill in the entry in the procedure linkage table. */ | |
4623 | if (! info->shared) | |
4624 | { | |
25e762b9 RM |
4625 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
4626 | abed->plt->plt_entry_size); | |
252b5132 | 4627 | bfd_put_32 (output_bfd, |
cbe950e9 L |
4628 | (gotplt->output_section->vma |
4629 | + gotplt->output_offset | |
252b5132 | 4630 | + got_offset), |
25e762b9 RM |
4631 | plt->contents + h->plt.offset |
4632 | + abed->plt->plt_got_offset); | |
eac338cf | 4633 | |
25e762b9 | 4634 | if (abed->is_vxworks) |
eac338cf PB |
4635 | { |
4636 | int s, k, reloc_index; | |
4637 | ||
4638 | /* Create the R_386_32 relocation referencing the GOT | |
4639 | for this PLT entry. */ | |
4640 | ||
4641 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
4642 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
4643 | / abed->plt->plt_entry_size); | |
eac338cf PB |
4644 | /* K: Number of relocations for PLTResolve. */ |
4645 | if (info->shared) | |
4646 | k = PLTRESOLVE_RELOCS_SHLIB; | |
4647 | else | |
4648 | k = PLTRESOLVE_RELOCS; | |
4649 | /* Skip the PLTresolve relocations, and the relocations for | |
4650 | the other PLT slots. */ | |
4651 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
4652 | loc = (htab->srelplt2->contents + reloc_index | |
4653 | * sizeof (Elf32_External_Rel)); | |
4654 | ||
6de2ae4a L |
4655 | rel.r_offset = (htab->elf.splt->output_section->vma |
4656 | + htab->elf.splt->output_offset | |
eac338cf | 4657 | + h->plt.offset + 2), |
7325306f | 4658 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4659 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4660 | ||
4661 | /* Create the R_386_32 relocation referencing the beginning of | |
4662 | the PLT for this GOT entry. */ | |
6de2ae4a L |
4663 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
4664 | + htab->elf.sgotplt->output_offset | |
eac338cf | 4665 | + got_offset); |
7325306f | 4666 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 4667 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 4668 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 4669 | } |
252b5132 RH |
4670 | } |
4671 | else | |
4672 | { | |
25e762b9 RM |
4673 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
4674 | abed->plt->plt_entry_size); | |
252b5132 | 4675 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
4676 | plt->contents + h->plt.offset |
4677 | + abed->plt->plt_got_offset); | |
252b5132 RH |
4678 | } |
4679 | ||
252b5132 RH |
4680 | /* Fill in the entry in the global offset table. */ |
4681 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4682 | (plt->output_section->vma |
4683 | + plt->output_offset | |
252b5132 | 4684 | + h->plt.offset |
25e762b9 | 4685 | + abed->plt->plt_lazy_offset), |
cbe950e9 | 4686 | gotplt->contents + got_offset); |
252b5132 RH |
4687 | |
4688 | /* Fill in the entry in the .rel.plt section. */ | |
cbe950e9 L |
4689 | rel.r_offset = (gotplt->output_section->vma |
4690 | + gotplt->output_offset | |
252b5132 | 4691 | + got_offset); |
cbe950e9 L |
4692 | if (h->dynindx == -1 |
4693 | || ((info->executable | |
4694 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4695 | && h->def_regular | |
4696 | && h->type == STT_GNU_IFUNC)) | |
4697 | { | |
4698 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4699 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
4700 | in the .got.plt section. */ | |
4701 | bfd_put_32 (output_bfd, | |
23209a78 | 4702 | (h->root.u.def.value |
cbe950e9 L |
4703 | + h->root.u.def.section->output_section->vma |
4704 | + h->root.u.def.section->output_offset), | |
4705 | gotplt->contents + got_offset); | |
4706 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
e1f98742 L |
4707 | /* R_386_IRELATIVE comes last. */ |
4708 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4709 | } |
4710 | else | |
e1f98742 L |
4711 | { |
4712 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
4713 | plt_index = htab->next_jump_slot_index++; | |
4714 | } | |
cbe950e9 | 4715 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); |
0ac8d2ca | 4716 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 4717 | |
e1f98742 L |
4718 | /* Don't fill PLT entry for static executables. */ |
4719 | if (plt == htab->elf.splt) | |
4720 | { | |
4721 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
4722 | plt->contents + h->plt.offset | |
4723 | + abed->plt->plt_reloc_offset); | |
4724 | bfd_put_32 (output_bfd, - (h->plt.offset | |
4725 | + abed->plt->plt_plt_offset + 4), | |
4726 | plt->contents + h->plt.offset | |
4727 | + abed->plt->plt_plt_offset); | |
4728 | } | |
dd7e64d4 L |
4729 | } |
4730 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
4731 | { | |
4732 | bfd_vma got_offset, plt_offset; | |
4733 | asection *plt, *got, *gotplt; | |
4734 | const bfd_byte *got_plt_entry; | |
4735 | ||
4736 | /* Offset of displacement of the indirect jump. */ | |
4737 | bfd_vma plt_got_offset = 2; | |
e1f98742 | 4738 | |
dd7e64d4 L |
4739 | /* Set the entry in the GOT procedure linkage table. */ |
4740 | plt = htab->plt_got; | |
4741 | got = htab->elf.sgot; | |
4742 | gotplt = htab->elf.sgotplt; | |
4743 | got_offset = h->got.offset; | |
4744 | ||
4745 | if (got_offset == (bfd_vma) -1 | |
4746 | || plt == NULL | |
4747 | || got == NULL | |
4748 | || gotplt == NULL) | |
4749 | abort (); | |
4750 | ||
4751 | /* Fill in the entry in the GOT procedure linkage table. */ | |
4752 | if (! info->shared) | |
252b5132 | 4753 | { |
dd7e64d4 L |
4754 | got_plt_entry = elf_i386_got_plt_entry; |
4755 | got_offset += got->output_section->vma + got->output_offset; | |
252b5132 | 4756 | } |
dd7e64d4 L |
4757 | else |
4758 | { | |
4759 | got_plt_entry = elf_i386_pic_got_plt_entry; | |
4760 | got_offset += (got->output_section->vma | |
4761 | + got->output_offset | |
4762 | - gotplt->output_section->vma | |
4763 | - gotplt->output_offset); | |
4764 | } | |
4765 | ||
4766 | plt_offset = eh->plt_got.offset; | |
4767 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
4768 | sizeof (elf_i386_got_plt_entry)); | |
4769 | bfd_put_32 (output_bfd, got_offset, | |
4770 | plt->contents + plt_offset + plt_got_offset); | |
4771 | } | |
4772 | ||
4773 | if (!h->def_regular | |
4774 | && (h->plt.offset != (bfd_vma) -1 | |
4775 | || eh->plt_got.offset != (bfd_vma) -1)) | |
4776 | { | |
4777 | /* Mark the symbol as undefined, rather than as defined in | |
4778 | the .plt section. Leave the value if there were any | |
4779 | relocations where pointer equality matters (this is a clue | |
4780 | for the dynamic linker, to make function pointer | |
4781 | comparisons work between an application and shared | |
4782 | library), otherwise set it to zero. If a function is only | |
4783 | called from a binary, there is no need to slow down | |
4784 | shared libraries because of that. */ | |
4785 | sym->st_shndx = SHN_UNDEF; | |
4786 | if (!h->pointer_equality_needed) | |
4787 | sym->st_value = 0; | |
252b5132 RH |
4788 | } |
4789 | ||
13ae64f3 | 4790 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 4791 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 4792 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 4793 | { |
947216bf | 4794 | Elf_Internal_Rela rel; |
252b5132 RH |
4795 | |
4796 | /* This symbol has an entry in the global offset table. Set it | |
4797 | up. */ | |
4798 | ||
6de2ae4a | 4799 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 4800 | abort (); |
252b5132 | 4801 | |
6de2ae4a L |
4802 | rel.r_offset = (htab->elf.sgot->output_section->vma |
4803 | + htab->elf.sgot->output_offset | |
dc810e39 | 4804 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 4805 | |
dd5724d5 AM |
4806 | /* If this is a static link, or it is a -Bsymbolic link and the |
4807 | symbol is defined locally or was forced to be local because | |
4808 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
4809 | The entry in the global offset table will already have been |
4810 | initialized in the relocate_section function. */ | |
710ab287 | 4811 | if (h->def_regular |
0018b0a3 L |
4812 | && h->type == STT_GNU_IFUNC) |
4813 | { | |
710ab287 L |
4814 | if (info->shared) |
4815 | { | |
4816 | /* Generate R_386_GLOB_DAT. */ | |
4817 | goto do_glob_dat; | |
4818 | } | |
4819 | else | |
4820 | { | |
cd2b2c10 L |
4821 | asection *plt; |
4822 | ||
710ab287 L |
4823 | if (!h->pointer_equality_needed) |
4824 | abort (); | |
4825 | ||
4826 | /* For non-shared object, we can't use .got.plt, which | |
4827 | contains the real function addres if we need pointer | |
4828 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 4829 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4830 | bfd_put_32 (output_bfd, |
4831 | (plt->output_section->vma | |
4832 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 4833 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4834 | return TRUE; |
4835 | } | |
0018b0a3 L |
4836 | } |
4837 | else if (info->shared | |
4838 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
dd5724d5 | 4839 | { |
6725bdbf | 4840 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
4841 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
4842 | } | |
252b5132 RH |
4843 | else |
4844 | { | |
dd5724d5 | 4845 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 4846 | do_glob_dat: |
6725bdbf | 4847 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4848 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
4849 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
4850 | } | |
4851 | ||
59d6ffb2 | 4852 | elf_append_rel (output_bfd, htab->elf.srelgot, &rel); |
252b5132 RH |
4853 | } |
4854 | ||
f5385ebf | 4855 | if (h->needs_copy) |
252b5132 | 4856 | { |
947216bf | 4857 | Elf_Internal_Rela rel; |
252b5132 RH |
4858 | |
4859 | /* This symbol needs a copy reloc. Set it up. */ | |
4860 | ||
ffb2e45b AM |
4861 | if (h->dynindx == -1 |
4862 | || (h->root.type != bfd_link_hash_defined | |
4863 | && h->root.type != bfd_link_hash_defweak) | |
4864 | || htab->srelbss == NULL) | |
4865 | abort (); | |
252b5132 RH |
4866 | |
4867 | rel.r_offset = (h->root.u.def.value | |
4868 | + h->root.u.def.section->output_section->vma | |
4869 | + h->root.u.def.section->output_offset); | |
4870 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
59d6ffb2 | 4871 | elf_append_rel (output_bfd, htab->srelbss, &rel); |
252b5132 RH |
4872 | } |
4873 | ||
b34976b6 | 4874 | return TRUE; |
252b5132 RH |
4875 | } |
4876 | ||
c25bc9fc L |
4877 | /* Finish up local dynamic symbol handling. We set the contents of |
4878 | various dynamic sections here. */ | |
4879 | ||
4880 | static bfd_boolean | |
4881 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
4882 | { | |
4883 | struct elf_link_hash_entry *h | |
4884 | = (struct elf_link_hash_entry *) *slot; | |
4885 | struct bfd_link_info *info | |
23209a78 | 4886 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
4887 | |
4888 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
4889 | h, NULL); | |
4890 | } | |
4891 | ||
38701953 AM |
4892 | /* Used to decide how to sort relocs in an optimal manner for the |
4893 | dynamic linker, before writing them out. */ | |
4894 | ||
4895 | static enum elf_reloc_type_class | |
7e612e98 AM |
4896 | elf_i386_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, |
4897 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
4898 | const Elf_Internal_Rela *rela) | |
38701953 | 4899 | { |
55fd94b0 | 4900 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
4901 | { |
4902 | case R_386_RELATIVE: | |
4903 | return reloc_class_relative; | |
4904 | case R_386_JUMP_SLOT: | |
4905 | return reloc_class_plt; | |
4906 | case R_386_COPY: | |
4907 | return reloc_class_copy; | |
4908 | default: | |
4909 | return reloc_class_normal; | |
4910 | } | |
4911 | } | |
4912 | ||
252b5132 RH |
4913 | /* Finish up the dynamic sections. */ |
4914 | ||
b34976b6 | 4915 | static bfd_boolean |
55fd94b0 AM |
4916 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4917 | struct bfd_link_info *info) | |
252b5132 | 4918 | { |
6725bdbf | 4919 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4920 | bfd *dynobj; |
252b5132 | 4921 | asection *sdyn; |
25e762b9 | 4922 | const struct elf_i386_backend_data *abed; |
252b5132 | 4923 | |
6725bdbf | 4924 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4925 | if (htab == NULL) |
4926 | return FALSE; | |
4927 | ||
ebe50bae | 4928 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4929 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 4930 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 4931 | |
ebe50bae | 4932 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4933 | { |
252b5132 RH |
4934 | Elf32_External_Dyn *dyncon, *dynconend; |
4935 | ||
6de2ae4a | 4936 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 4937 | abort (); |
252b5132 RH |
4938 | |
4939 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4940 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4941 | for (; dyncon < dynconend; dyncon++) |
4942 | { | |
4943 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4944 | asection *s; |
252b5132 RH |
4945 | |
4946 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4947 | ||
4948 | switch (dyn.d_tag) | |
4949 | { | |
4950 | default: | |
25e762b9 RM |
4951 | if (abed->is_vxworks |
4952 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 4953 | break; |
0ac8d2ca | 4954 | continue; |
252b5132 RH |
4955 | |
4956 | case DT_PLTGOT: | |
6de2ae4a | 4957 | s = htab->elf.sgotplt; |
8c37241b | 4958 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
4959 | break; |
4960 | ||
252b5132 | 4961 | case DT_JMPREL: |
6de2ae4a | 4962 | s = htab->elf.srelplt; |
6348e046 | 4963 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
4964 | break; |
4965 | ||
4966 | case DT_PLTRELSZ: | |
6de2ae4a | 4967 | s = htab->elf.srelplt; |
eea6121a | 4968 | dyn.d_un.d_val = s->size; |
252b5132 RH |
4969 | break; |
4970 | ||
4971 | case DT_RELSZ: | |
4972 | /* My reading of the SVR4 ABI indicates that the | |
4973 | procedure linkage table relocs (DT_JMPREL) should be | |
4974 | included in the overall relocs (DT_REL). This is | |
4975 | what Solaris does. However, UnixWare can not handle | |
4976 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 4977 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 4978 | s = htab->elf.srelplt; |
6348e046 AM |
4979 | if (s == NULL) |
4980 | continue; | |
eea6121a | 4981 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
4982 | break; |
4983 | ||
4984 | case DT_REL: | |
4985 | /* We may not be using the standard ELF linker script. | |
4986 | If .rel.plt is the first .rel section, we adjust | |
4987 | DT_REL to not include it. */ | |
6de2ae4a | 4988 | s = htab->elf.srelplt; |
6348e046 AM |
4989 | if (s == NULL) |
4990 | continue; | |
4991 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
4992 | continue; | |
eea6121a | 4993 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
4994 | break; |
4995 | } | |
0ac8d2ca AM |
4996 | |
4997 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
4998 | } |
4999 | ||
5000 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 5001 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 RH |
5002 | { |
5003 | if (info->shared) | |
eac338cf | 5004 | { |
25e762b9 RM |
5005 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
5006 | abed->plt->plt0_entry_size); | |
5007 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5008 | abed->plt0_pad_byte, | |
5009 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 5010 | } |
252b5132 RH |
5011 | else |
5012 | { | |
25e762b9 RM |
5013 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
5014 | abed->plt->plt0_entry_size); | |
5015 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
5016 | abed->plt0_pad_byte, | |
5017 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 5018 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5019 | (htab->elf.sgotplt->output_section->vma |
5020 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5021 | + 4), |
25e762b9 RM |
5022 | htab->elf.splt->contents |
5023 | + abed->plt->plt0_got1_offset); | |
252b5132 | 5024 | bfd_put_32 (output_bfd, |
6de2ae4a L |
5025 | (htab->elf.sgotplt->output_section->vma |
5026 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 5027 | + 8), |
25e762b9 RM |
5028 | htab->elf.splt->contents |
5029 | + abed->plt->plt0_got2_offset); | |
eac338cf | 5030 | |
25e762b9 | 5031 | if (abed->is_vxworks) |
eac338cf PB |
5032 | { |
5033 | Elf_Internal_Rela rel; | |
7325306f | 5034 | |
eac338cf PB |
5035 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
5036 | On IA32 we use REL relocations so the addend goes in | |
5037 | the PLT directly. */ | |
6de2ae4a L |
5038 | rel.r_offset = (htab->elf.splt->output_section->vma |
5039 | + htab->elf.splt->output_offset | |
25e762b9 | 5040 | + abed->plt->plt0_got1_offset); |
7325306f | 5041 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5042 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5043 | htab->srelplt2->contents); | |
5044 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
5045 | rel.r_offset = (htab->elf.splt->output_section->vma |
5046 | + htab->elf.splt->output_offset | |
25e762b9 | 5047 | + abed->plt->plt0_got2_offset); |
7325306f | 5048 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5049 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5050 | htab->srelplt2->contents + | |
5051 | sizeof (Elf32_External_Rel)); | |
5052 | } | |
252b5132 RH |
5053 | } |
5054 | ||
5055 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
5056 | really seem like the right value. */ | |
6de2ae4a | 5057 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 5058 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
5059 | |
5060 | /* Correct the .rel.plt.unloaded relocations. */ | |
25e762b9 | 5061 | if (abed->is_vxworks && !info->shared) |
eac338cf | 5062 | { |
25e762b9 RM |
5063 | int num_plts = (htab->elf.splt->size |
5064 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 5065 | unsigned char *p; |
eac338cf PB |
5066 | |
5067 | p = htab->srelplt2->contents; | |
5068 | if (info->shared) | |
5069 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
5070 | else | |
5071 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5072 | ||
5073 | for (; num_plts; num_plts--) | |
5074 | { | |
5075 | Elf_Internal_Rela rel; | |
5076 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5077 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5078 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5079 | p += sizeof (Elf32_External_Rel); | |
5080 | ||
5081 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 5082 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
5083 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
5084 | p += sizeof (Elf32_External_Rel); | |
5085 | } | |
5086 | } | |
252b5132 RH |
5087 | } |
5088 | } | |
5089 | ||
6de2ae4a | 5090 | if (htab->elf.sgotplt) |
252b5132 | 5091 | { |
56d4289c L |
5092 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5093 | { | |
5094 | (*_bfd_error_handler) | |
5095 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
5096 | return FALSE; | |
5097 | } | |
5098 | ||
12d0ee4a | 5099 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 5100 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
5101 | { |
5102 | bfd_put_32 (output_bfd, | |
55fd94b0 | 5103 | (sdyn == NULL ? 0 |
12d0ee4a | 5104 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
5105 | htab->elf.sgotplt->contents); |
5106 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5107 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 5108 | } |
252b5132 | 5109 | |
6de2ae4a | 5110 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5111 | } |
8c37241b | 5112 | |
e41b3a13 | 5113 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5114 | if (htab->plt_eh_frame != NULL |
5115 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5116 | { |
5117 | if (htab->elf.splt != NULL | |
5118 | && htab->elf.splt->size != 0 | |
5119 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5120 | && htab->elf.splt->output_section != NULL | |
5121 | && htab->plt_eh_frame->output_section != NULL) | |
5122 | { | |
5123 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5124 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5125 | + htab->plt_eh_frame->output_offset | |
5126 | + PLT_FDE_START_OFFSET; | |
5127 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5128 | htab->plt_eh_frame->contents | |
5129 | + PLT_FDE_START_OFFSET); | |
5130 | } | |
5131 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5132 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5133 | { |
5134 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5135 | htab->plt_eh_frame, | |
5136 | htab->plt_eh_frame->contents)) | |
5137 | return FALSE; | |
5138 | } | |
5139 | } | |
5140 | ||
6de2ae4a L |
5141 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5142 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5143 | |
c25bc9fc L |
5144 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5145 | htab_traverse (htab->loc_hash_table, | |
5146 | elf_i386_finish_local_dynamic_symbol, | |
5147 | info); | |
5148 | ||
b34976b6 | 5149 | return TRUE; |
252b5132 RH |
5150 | } |
5151 | ||
3972882e | 5152 | /* Return an array of PLT entry symbol values. */ |
4c45e5c9 | 5153 | |
3972882e L |
5154 | static bfd_vma * |
5155 | elf_i386_get_plt_sym_val (bfd *abfd, asymbol **dynsyms, asection *plt, | |
5156 | asection *relplt) | |
4c45e5c9 | 5157 | { |
3972882e L |
5158 | bfd_boolean (*slurp_relocs) (bfd *, asection *, asymbol **, bfd_boolean); |
5159 | arelent *p; | |
5160 | long count, i; | |
5161 | bfd_vma *plt_sym_val; | |
144bed8d | 5162 | bfd_vma plt_offset; |
3972882e L |
5163 | bfd_byte *plt_contents; |
5164 | const struct elf_i386_backend_data *bed | |
5165 | = get_elf_i386_backend_data (abfd); | |
5166 | Elf_Internal_Shdr *hdr; | |
5167 | ||
5168 | /* Get the .plt section contents. */ | |
5169 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
5170 | if (plt_contents == NULL) | |
5171 | return NULL; | |
5172 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
5173 | plt_contents, 0, plt->size)) | |
5174 | { | |
5175 | bad_return: | |
5176 | free (plt_contents); | |
5177 | return NULL; | |
5178 | } | |
144bed8d | 5179 | |
3972882e L |
5180 | slurp_relocs = get_elf_backend_data (abfd)->s->slurp_reloc_table; |
5181 | if (! (*slurp_relocs) (abfd, relplt, dynsyms, TRUE)) | |
5182 | goto bad_return; | |
144bed8d | 5183 | |
3972882e L |
5184 | hdr = &elf_section_data (relplt)->this_hdr; |
5185 | count = relplt->size / hdr->sh_entsize; | |
5186 | ||
5187 | plt_sym_val = (bfd_vma *) bfd_malloc (sizeof (bfd_vma) * count); | |
5188 | if (plt_sym_val == NULL) | |
5189 | goto bad_return; | |
cca5b8b6 | 5190 | |
35181b3e | 5191 | for (i = 0; i < count; i++) |
3972882e | 5192 | plt_sym_val[i] = -1; |
cca5b8b6 | 5193 | |
3972882e L |
5194 | plt_offset = bed->plt->plt_entry_size; |
5195 | p = relplt->relocation; | |
5196 | for (i = 0; i < count; i++, p++) | |
144bed8d | 5197 | { |
3972882e L |
5198 | long reloc_index; |
5199 | ||
6f25f223 | 5200 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ |
533d0af0 | 5201 | if (p->howto == NULL) |
6f25f223 | 5202 | continue; |
533d0af0 L |
5203 | |
5204 | if (p->howto->type != R_386_JUMP_SLOT | |
5205 | && p->howto->type != R_386_IRELATIVE) | |
3972882e L |
5206 | continue; |
5207 | ||
5208 | reloc_index = H_GET_32 (abfd, (plt_contents + plt_offset | |
5209 | + bed->plt->plt_reloc_offset)); | |
5210 | reloc_index /= sizeof (Elf32_External_Rel); | |
5211 | if (reloc_index >= count) | |
5212 | abort (); | |
5213 | plt_sym_val[reloc_index] = plt->vma + plt_offset; | |
144bed8d L |
5214 | plt_offset += bed->plt->plt_entry_size; |
5215 | } | |
5216 | ||
3972882e L |
5217 | free (plt_contents); |
5218 | ||
5219 | return plt_sym_val; | |
5220 | } | |
5221 | ||
5222 | /* Similar to _bfd_elf_get_synthetic_symtab. */ | |
5223 | ||
5224 | static long | |
5225 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
5226 | long symcount, | |
5227 | asymbol **syms, | |
5228 | long dynsymcount, | |
5229 | asymbol **dynsyms, | |
5230 | asymbol **ret) | |
5231 | { | |
5232 | asection *plt = bfd_get_section_by_name (abfd, ".plt"); | |
5233 | return _bfd_elf_ifunc_get_synthetic_symtab (abfd, symcount, syms, | |
5234 | dynsymcount, dynsyms, ret, | |
5235 | plt, | |
5236 | elf_i386_get_plt_sym_val); | |
4c45e5c9 JJ |
5237 | } |
5238 | ||
fdc90cb4 JJ |
5239 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5240 | ||
5241 | static bfd_boolean | |
5242 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
5243 | { | |
5244 | if (h->plt.offset != (bfd_vma) -1 | |
5245 | && !h->def_regular | |
5246 | && !h->pointer_equality_needed) | |
5247 | return FALSE; | |
5248 | ||
5249 | return _bfd_elf_hash_symbol (h); | |
5250 | } | |
4c45e5c9 | 5251 | |
d8045f23 NC |
5252 | /* Hook called by the linker routine which adds symbols from an object |
5253 | file. */ | |
5254 | ||
5255 | static bfd_boolean | |
c16153ae | 5256 | elf_i386_add_symbol_hook (bfd * abfd, |
f1885d1e | 5257 | struct bfd_link_info * info, |
d8045f23 NC |
5258 | Elf_Internal_Sym * sym, |
5259 | const char ** namep ATTRIBUTE_UNUSED, | |
5260 | flagword * flagsp ATTRIBUTE_UNUSED, | |
5261 | asection ** secp ATTRIBUTE_UNUSED, | |
5262 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
5263 | { | |
f1885d1e AM |
5264 | if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
5265 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) | |
5266 | && (abfd->flags & DYNAMIC) == 0 | |
5267 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
f64b2e8d | 5268 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; |
d8045f23 NC |
5269 | |
5270 | return TRUE; | |
5271 | } | |
5272 | ||
6d00b590 | 5273 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
5274 | #define TARGET_LITTLE_NAME "elf32-i386" |
5275 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5276 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5277 | #define ELF_MACHINE_CODE EM_386 |
5278 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5279 | |
5280 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5281 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5282 | #define elf_backend_want_got_plt 1 |
5283 | #define elf_backend_plt_readonly 1 | |
5284 | #define elf_backend_want_plt_sym 0 | |
5285 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5286 | #define elf_backend_plt_alignment 4 |
252b5132 | 5287 | |
8c29f035 AM |
5288 | /* Support RELA for objdump of prelink objects. */ |
5289 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5290 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5291 | ||
13ae64f3 | 5292 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5293 | |
dd5724d5 AM |
5294 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
5295 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
5296 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 5297 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 5298 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
5299 | |
5300 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5301 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5302 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 5303 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 5304 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 5305 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5306 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5307 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
5308 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
5309 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
5310 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5311 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5312 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5313 | #define elf_backend_relocate_section elf_i386_relocate_section |
5314 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 5315 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
5316 | #define elf_backend_omit_section_dynsym \ |
5317 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 5318 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 | 5319 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
dd5724d5 | 5320 | |
252b5132 | 5321 | #include "elf32-target.h" |
2bc3c89a AM |
5322 | |
5323 | /* FreeBSD support. */ | |
5324 | ||
5325 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5326 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
5327 | #undef TARGET_LITTLE_NAME |
5328 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
5329 | #undef ELF_OSABI |
5330 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
5331 | |
5332 | /* The kernel recognizes executables as valid only if they carry a | |
5333 | "FreeBSD" label in the ELF header. So we put this label on all | |
5334 | executables and (for simplicity) also all other object files. */ | |
5335 | ||
2bc3c89a | 5336 | static void |
d8045f23 | 5337 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 5338 | { |
78245035 | 5339 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 5340 | |
2bc3c89a | 5341 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
5342 | { |
5343 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5344 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
5345 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
5346 | } | |
caf47ea6 | 5347 | #endif |
2bc3c89a AM |
5348 | } |
5349 | ||
5350 | #undef elf_backend_post_process_headers | |
d8045f23 | 5351 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
5352 | #undef elf32_bed |
5353 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 5354 | |
d8045f23 NC |
5355 | #undef elf_backend_add_symbol_hook |
5356 | ||
2bc3c89a | 5357 | #include "elf32-target.h" |
eac338cf | 5358 | |
a6cc6b3b RO |
5359 | /* Solaris 2. */ |
5360 | ||
5361 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5362 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
5363 | #undef TARGET_LITTLE_NAME |
5364 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
5365 | ||
5366 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5367 | objects won't be recognized. */ | |
5368 | #undef ELF_OSABI | |
5369 | ||
5370 | #undef elf32_bed | |
5371 | #define elf32_bed elf32_i386_sol2_bed | |
5372 | ||
7dc98aea RO |
5373 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
5374 | boundary. */ | |
5375 | #undef elf_backend_static_tls_alignment | |
5376 | #define elf_backend_static_tls_alignment 8 | |
5377 | ||
a6cc6b3b RO |
5378 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5379 | ||
5380 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5381 | File, p.63. */ | |
5382 | #undef elf_backend_want_plt_sym | |
5383 | #define elf_backend_want_plt_sym 1 | |
5384 | ||
5385 | #include "elf32-target.h" | |
5386 | ||
a27e4371 RM |
5387 | /* Native Client support. */ |
5388 | ||
5389 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5390 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
5391 | #undef TARGET_LITTLE_NAME |
5392 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
5393 | #undef elf32_bed | |
5394 | #define elf32_bed elf32_i386_nacl_bed | |
5395 | ||
5396 | #undef ELF_MAXPAGESIZE | |
5397 | #define ELF_MAXPAGESIZE 0x10000 | |
5398 | ||
5399 | /* Restore defaults. */ | |
5400 | #undef ELF_OSABI | |
5401 | #undef elf_backend_want_plt_sym | |
5402 | #define elf_backend_want_plt_sym 0 | |
5403 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
5404 | #undef elf_backend_static_tls_alignment |
5405 | ||
5406 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5407 | ||
5408 | #undef elf_backend_plt_alignment | |
5409 | #define elf_backend_plt_alignment 5 | |
5410 | #define NACL_PLT_ENTRY_SIZE 64 | |
5411 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5412 | ||
5413 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
5414 | { | |
5415 | 0xff, 0x35, /* pushl contents of address */ | |
5416 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
5417 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5418 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
5419 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5420 | 0xff, 0xe1 /* jmp *%ecx */ | |
5421 | }; | |
5422 | ||
5423 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5424 | { | |
5425 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5426 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
5427 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5428 | 0xff, 0xe1, /* jmp *%ecx */ | |
5429 | ||
5430 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5431 | 0x90, | |
5432 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5433 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5434 | ||
5435 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5436 | 0x68, /* pushl immediate */ | |
5437 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
5438 | 0xe9, /* jmp relative */ | |
5439 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
5440 | ||
5441 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5442 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5443 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5444 | 0x90, 0x90 | |
5445 | }; | |
5446 | ||
5447 | static const bfd_byte | |
5448 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
5449 | { | |
5450 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
5451 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
5452 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
5453 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
5454 | |
5455 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
5456 | so pad to that size with nop instructions. */ | |
5457 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
5458 | }; |
5459 | ||
5460 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5461 | { | |
5462 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
5463 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
5464 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
5465 | 0xff, 0xe1, /* jmp *%ecx */ | |
5466 | ||
5467 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5468 | 0x90, | |
5469 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5470 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5471 | ||
5472 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5473 | 0x68, /* pushl immediate */ | |
5474 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
5475 | 0xe9, /* jmp relative */ | |
5476 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
5477 | ||
5478 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5479 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5480 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5481 | 0x90, 0x90 | |
5482 | }; | |
5483 | ||
5484 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
5485 | { | |
5486 | #if (PLT_CIE_LENGTH != 20 \ | |
5487 | || PLT_FDE_LENGTH != 36 \ | |
5488 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5489 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5490 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
5491 | #endif | |
5492 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5493 | 0, 0, 0, 0, /* CIE ID */ | |
5494 | 1, /* CIE version */ | |
5495 | 'z', 'R', 0, /* Augmentation string */ | |
5496 | 1, /* Code alignment factor */ | |
5497 | 0x7c, /* Data alignment factor: -4 */ | |
5498 | 8, /* Return address column */ | |
5499 | 1, /* Augmentation size */ | |
5500 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5501 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
5502 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
5503 | DW_CFA_nop, DW_CFA_nop, | |
5504 | ||
5505 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5506 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
5507 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
5508 | 0, 0, 0, 0, /* .plt size goes here */ | |
5509 | 0, /* Augmentation size */ | |
5510 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
5511 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5512 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
5513 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5514 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5515 | 13, /* Block length */ | |
5516 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
5517 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
5518 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5519 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
5520 | DW_CFA_nop, DW_CFA_nop | |
5521 | }; | |
5522 | ||
5523 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
5524 | { | |
5525 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
5526 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
5527 | 2, /* plt0_got1_offset */ | |
5528 | 8, /* plt0_got2_offset */ | |
5529 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
5530 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5531 | 2, /* plt_got_offset */ | |
5532 | 33, /* plt_reloc_offset */ | |
5533 | 38, /* plt_plt_offset */ | |
5534 | 32, /* plt_lazy_offset */ | |
5535 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
5536 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
5537 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5538 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
5539 | }; | |
5540 | ||
5541 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
5542 | { | |
5543 | &elf_i386_nacl_plt, /* plt */ | |
5544 | 0x90, /* plt0_pad_byte: nop insn */ | |
5545 | 0, /* is_vxworks */ | |
5546 | }; | |
5547 | ||
64b384e1 RM |
5548 | static bfd_boolean |
5549 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
5550 | { | |
5551 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
5552 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
5553 | return TRUE; | |
5554 | } | |
5555 | ||
a27e4371 RM |
5556 | #undef elf_backend_arch_data |
5557 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
5558 | ||
64b384e1 RM |
5559 | #undef elf_backend_object_p |
5560 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
5561 | #undef elf_backend_modify_segment_map |
5562 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5563 | #undef elf_backend_modify_program_headers | |
5564 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
5565 | #undef elf_backend_final_write_processing |
5566 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 5567 | |
a27e4371 RM |
5568 | #include "elf32-target.h" |
5569 | ||
5a68afcf | 5570 | /* Restore defaults. */ |
64b384e1 | 5571 | #undef elf_backend_object_p |
5a68afcf RM |
5572 | #undef elf_backend_modify_segment_map |
5573 | #undef elf_backend_modify_program_headers | |
887badb3 | 5574 | #undef elf_backend_final_write_processing |
5a68afcf | 5575 | |
eac338cf PB |
5576 | /* VxWorks support. */ |
5577 | ||
5578 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 5579 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
5580 | #undef TARGET_LITTLE_NAME |
5581 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 5582 | #undef ELF_OSABI |
a27e4371 RM |
5583 | #undef elf_backend_plt_alignment |
5584 | #define elf_backend_plt_alignment 4 | |
eac338cf | 5585 | |
23209a78 RM |
5586 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
5587 | { | |
25e762b9 | 5588 | &elf_i386_plt, /* plt */ |
23209a78 RM |
5589 | 0x90, /* plt0_pad_byte */ |
5590 | 1, /* is_vxworks */ | |
5591 | }; | |
eac338cf | 5592 | |
23209a78 RM |
5593 | #undef elf_backend_arch_data |
5594 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 5595 | |
13285a1b | 5596 | #undef elf_backend_relocs_compatible |
eac338cf PB |
5597 | #undef elf_backend_add_symbol_hook |
5598 | #define elf_backend_add_symbol_hook \ | |
5599 | elf_vxworks_add_symbol_hook | |
5600 | #undef elf_backend_link_output_symbol_hook | |
5601 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 5602 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
5603 | #undef elf_backend_emit_relocs |
5604 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
5605 | #undef elf_backend_final_write_processing | |
5606 | #define elf_backend_final_write_processing \ | |
5607 | elf_vxworks_final_write_processing | |
7dc98aea | 5608 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
5609 | |
5610 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
5611 | define it. */ | |
5612 | #undef elf_backend_want_plt_sym | |
5613 | #define elf_backend_want_plt_sym 1 | |
5614 | ||
5615 | #undef elf32_bed | |
5616 | #define elf32_bed elf32_i386_vxworks_bed | |
5617 | ||
5618 | #include "elf32-target.h" |