Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
2571583a | 2 | Copyright (C) 1993-2017 Free Software Foundation, Inc. |
252b5132 | 3 | |
571fe01f | 4 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 5 | |
571fe01f NC |
6 | This program is free software; you can redistribute it and/or modify |
7 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 8 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 9 | (at your option) any later version. |
252b5132 | 10 | |
571fe01f NC |
11 | This program is distributed in the hope that it will be useful, |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
252b5132 | 15 | |
571fe01f NC |
16 | You should have received a copy of the GNU General Public License |
17 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
252b5132 | 20 | |
252b5132 | 21 | #include "sysdep.h" |
3db64b00 | 22 | #include "bfd.h" |
252b5132 RH |
23 | #include "bfdlink.h" |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
5a68afcf | 26 | #include "elf-nacl.h" |
eac338cf | 27 | #include "elf-vxworks.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
e41b3a13 | 31 | #include "dwarf2.h" |
02a86693 | 32 | #include "opcode/i386.h" |
252b5132 | 33 | |
55fd94b0 AM |
34 | /* 386 uses REL relocations instead of RELA. */ |
35 | #define USE_REL 1 | |
252b5132 RH |
36 | |
37 | #include "elf/i386.h" | |
38 | ||
39 | static reloc_howto_type elf_howto_table[]= | |
40 | { | |
6346d5ca | 41 | HOWTO(R_386_NONE, 0, 3, 0, FALSE, 0, complain_overflow_dont, |
1b452ec6 | 42 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
43 | TRUE, 0x00000000, 0x00000000, FALSE), |
44 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 45 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
46 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
47 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 48 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
49 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
50 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 51 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
52 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
53 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 54 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
55 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
56 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 57 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
58 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
59 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 60 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
61 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
62 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 63 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
64 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
65 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 66 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
67 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
68 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 69 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
70 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
71 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 72 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 73 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 74 | |
dc47f327 AM |
75 | /* We have a gap in the reloc numbers here. |
76 | R_386_standard counts the number up to this point, and | |
77 | R_386_ext_offset is the value to subtract from a reloc type of | |
78 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
79 | #define R_386_standard (R_386_GOTPC + 1) |
80 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 81 | |
37e55690 | 82 | /* These relocs are a GNU extension. */ |
b34976b6 | 83 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 84 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
85 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
86 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 87 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
88 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
89 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 90 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
91 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
92 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 93 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
94 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
95 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 96 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
97 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
98 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 99 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
100 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
101 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 102 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 103 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 104 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 105 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
106 | TRUE, 0xffff, 0xffff, TRUE), |
107 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 108 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
109 | TRUE, 0xff, 0xff, FALSE), |
110 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 111 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 112 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 113 | |
55fd94b0 AM |
114 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
115 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 116 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 117 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 118 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
119 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
120 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 121 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
122 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
123 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 124 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
125 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
126 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 127 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
128 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
129 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 130 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
131 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
132 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 133 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 134 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
1788fc08 L |
135 | HOWTO(R_386_SIZE32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, |
136 | bfd_elf_generic_reloc, "R_386_SIZE32", | |
137 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
67a4f2b7 AO |
138 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
139 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
140 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
141 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
142 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
143 | FALSE, 0, 0, FALSE), | |
144 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
146 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
147 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
148 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
149 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
02a86693 L |
150 | HOWTO(R_386_GOT32X, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
151 | bfd_elf_generic_reloc, "R_386_GOT32X", | |
152 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
153 | |
154 | /* Another gap. */ | |
02a86693 | 155 | #define R_386_ext2 (R_386_GOT32X + 1 - R_386_tls_offset) |
c74be520 | 156 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_ext2) |
252b5132 RH |
157 | |
158 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
159 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
160 | 0, /* rightshift */ | |
161 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
162 | 0, /* bitsize */ | |
b34976b6 | 163 | FALSE, /* pc_relative */ |
252b5132 RH |
164 | 0, /* bitpos */ |
165 | complain_overflow_dont, /* complain_on_overflow */ | |
166 | NULL, /* special_function */ | |
167 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 168 | FALSE, /* partial_inplace */ |
252b5132 RH |
169 | 0, /* src_mask */ |
170 | 0, /* dst_mask */ | |
b34976b6 | 171 | FALSE), /* pcrel_offset */ |
252b5132 RH |
172 | |
173 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
174 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
175 | 0, /* rightshift */ | |
176 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
177 | 0, /* bitsize */ | |
b34976b6 | 178 | FALSE, /* pc_relative */ |
252b5132 RH |
179 | 0, /* bitpos */ |
180 | complain_overflow_dont, /* complain_on_overflow */ | |
181 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
182 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 183 | FALSE, /* partial_inplace */ |
252b5132 RH |
184 | 0, /* src_mask */ |
185 | 0, /* dst_mask */ | |
b34976b6 | 186 | FALSE) /* pcrel_offset */ |
dc47f327 | 187 | |
55fd94b0 | 188 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
189 | |
190 | }; | |
191 | ||
252b5132 | 192 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
193 | #define TRACE(str) \ |
194 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
195 | #else |
196 | #define TRACE(str) | |
197 | #endif | |
198 | ||
199 | static reloc_howto_type * | |
55fd94b0 AM |
200 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
201 | bfd_reloc_code_real_type code) | |
252b5132 RH |
202 | { |
203 | switch (code) | |
204 | { | |
205 | case BFD_RELOC_NONE: | |
206 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_32: | |
210 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_CTOR: | |
214 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_32_PCREL: | |
218 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_GOT32: | |
222 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_PLT32: | |
226 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_COPY: | |
230 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_GLOB_DAT: | |
234 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_JUMP_SLOT: | |
238 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_RELATIVE: | |
242 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTOFF: | |
246 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
248 | |
249 | case BFD_RELOC_386_GOTPC: | |
250 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 251 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 252 | |
37e55690 JJ |
253 | /* These relocs are a GNU extension. */ |
254 | case BFD_RELOC_386_TLS_TPOFF: | |
255 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_IE: | |
259 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
261 | |
262 | case BFD_RELOC_386_TLS_GOTIE: | |
263 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 265 | |
13ae64f3 JJ |
266 | case BFD_RELOC_386_TLS_LE: |
267 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_GD: | |
271 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
273 | |
274 | case BFD_RELOC_386_TLS_LDM: | |
275 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 277 | |
252b5132 RH |
278 | case BFD_RELOC_16: |
279 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_16_PCREL: | |
283 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8: | |
287 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
289 | |
290 | case BFD_RELOC_8_PCREL: | |
291 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 292 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 293 | |
13ae64f3 JJ |
294 | /* Common with Sun TLS implementation. */ |
295 | case BFD_RELOC_386_TLS_LDO_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_IE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_LE_32: | |
304 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPMOD32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_DTPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
314 | |
315 | case BFD_RELOC_386_TLS_TPOFF32: | |
316 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 317 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 318 | |
1788fc08 L |
319 | case BFD_RELOC_SIZE32: |
320 | TRACE ("BFD_RELOC_SIZE32"); | |
321 | return &elf_howto_table[R_386_SIZE32 - R_386_tls_offset]; | |
322 | ||
67a4f2b7 AO |
323 | case BFD_RELOC_386_TLS_GOTDESC: |
324 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
325 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
326 | ||
327 | case BFD_RELOC_386_TLS_DESC_CALL: | |
328 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
329 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
330 | ||
331 | case BFD_RELOC_386_TLS_DESC: | |
332 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
333 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
334 | ||
cbe950e9 L |
335 | case BFD_RELOC_386_IRELATIVE: |
336 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 337 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 338 | |
02a86693 L |
339 | case BFD_RELOC_386_GOT32X: |
340 | TRACE ("BFD_RELOC_386_GOT32X"); | |
341 | return &elf_howto_table[R_386_GOT32X - R_386_tls_offset]; | |
342 | ||
252b5132 RH |
343 | case BFD_RELOC_VTABLE_INHERIT: |
344 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 345 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
346 | |
347 | case BFD_RELOC_VTABLE_ENTRY: | |
348 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 349 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
350 | |
351 | default: | |
352 | break; | |
353 | } | |
354 | ||
355 | TRACE ("Unknown"); | |
356 | return 0; | |
357 | } | |
358 | ||
157090f7 AM |
359 | static reloc_howto_type * |
360 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
361 | const char *r_name) | |
362 | { | |
363 | unsigned int i; | |
364 | ||
365 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
366 | if (elf_howto_table[i].name != NULL | |
367 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
368 | return &elf_howto_table[i]; | |
369 | ||
370 | return NULL; | |
371 | } | |
372 | ||
142411ca L |
373 | static reloc_howto_type * |
374 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 375 | { |
dc47f327 AM |
376 | unsigned int indx; |
377 | ||
378 | if ((indx = r_type) >= R_386_standard | |
379 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
380 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 381 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
c74be520 L |
382 | >= R_386_ext2 - R_386_ext) |
383 | && ((indx = r_type - R_386_vt_offset) - R_386_ext2 | |
384 | >= R_386_vt - R_386_ext2)) | |
252b5132 | 385 | { |
695344c0 | 386 | /* xgettext:c-format */ |
4eca0228 AM |
387 | _bfd_error_handler (_("%B: invalid relocation type %d"), |
388 | abfd, (int) r_type); | |
55fd94b0 | 389 | indx = R_386_NONE; |
252b5132 | 390 | } |
06614111 NC |
391 | /* PR 17512: file: 0f67f69d. */ |
392 | if (elf_howto_table [indx].type != r_type) | |
393 | return NULL; | |
142411ca L |
394 | return &elf_howto_table[indx]; |
395 | } | |
396 | ||
397 | static void | |
398 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
399 | arelent *cache_ptr, | |
400 | Elf_Internal_Rela *dst) | |
401 | { | |
402 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
403 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
404 | } |
405 | ||
406 | /* Return whether a symbol name implies a local label. The UnixWare | |
407 | 2.1 cc generates temporary symbols that start with .X, so we | |
408 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
409 | If so, we should move the .X recognition into | |
410 | _bfd_elf_is_local_label_name. */ | |
411 | ||
b34976b6 | 412 | static bfd_boolean |
55fd94b0 | 413 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
414 | { |
415 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 416 | return TRUE; |
252b5132 RH |
417 | |
418 | return _bfd_elf_is_local_label_name (abfd, name); | |
419 | } | |
420 | \f | |
38701953 | 421 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 422 | |
b34976b6 | 423 | static bfd_boolean |
55fd94b0 | 424 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
425 | { |
426 | int offset; | |
eea6121a | 427 | size_t size; |
38701953 | 428 | |
61adc1a4 | 429 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 430 | { |
61adc1a4 NC |
431 | int pr_version = bfd_get_32 (abfd, note->descdata); |
432 | ||
433 | if (pr_version != 1) | |
434 | return FALSE; | |
435 | ||
436 | /* pr_cursig */ | |
228e534f | 437 | elf_tdata (abfd)->core->signal = bfd_get_32 (abfd, note->descdata + 20); |
61adc1a4 NC |
438 | |
439 | /* pr_pid */ | |
228e534f | 440 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
441 | |
442 | /* pr_reg */ | |
443 | offset = 28; | |
eea6121a | 444 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
445 | } |
446 | else | |
447 | { | |
448 | switch (note->descsz) | |
449 | { | |
450 | default: | |
451 | return FALSE; | |
38701953 | 452 | |
61adc1a4 NC |
453 | case 144: /* Linux/i386 */ |
454 | /* pr_cursig */ | |
228e534f | 455 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); |
38701953 | 456 | |
61adc1a4 | 457 | /* pr_pid */ |
228e534f | 458 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 459 | |
61adc1a4 NC |
460 | /* pr_reg */ |
461 | offset = 72; | |
eea6121a | 462 | size = 68; |
38701953 | 463 | |
61adc1a4 NC |
464 | break; |
465 | } | |
38701953 AM |
466 | } |
467 | ||
468 | /* Make a ".reg/999" section. */ | |
469 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 470 | size, note->descpos + offset); |
38701953 AM |
471 | } |
472 | ||
b34976b6 | 473 | static bfd_boolean |
55fd94b0 | 474 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 475 | { |
61adc1a4 | 476 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 477 | { |
61adc1a4 NC |
478 | int pr_version = bfd_get_32 (abfd, note->descdata); |
479 | ||
480 | if (pr_version != 1) | |
b34976b6 | 481 | return FALSE; |
38701953 | 482 | |
228e534f | 483 | elf_tdata (abfd)->core->program |
61adc1a4 | 484 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); |
228e534f | 485 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
486 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); |
487 | } | |
488 | else | |
489 | { | |
490 | switch (note->descsz) | |
491 | { | |
492 | default: | |
493 | return FALSE; | |
494 | ||
495 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
228e534f | 496 | elf_tdata (abfd)->core->pid |
261b8d08 | 497 | = bfd_get_32 (abfd, note->descdata + 12); |
228e534f | 498 | elf_tdata (abfd)->core->program |
61adc1a4 | 499 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); |
228e534f | 500 | elf_tdata (abfd)->core->command |
61adc1a4 NC |
501 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); |
502 | } | |
38701953 AM |
503 | } |
504 | ||
505 | /* Note that for some reason, a spurious space is tacked | |
506 | onto the end of the args in some (at least one anyway) | |
507 | implementations, so strip it off if it exists. */ | |
38701953 | 508 | { |
228e534f | 509 | char *command = elf_tdata (abfd)->core->command; |
38701953 AM |
510 | int n = strlen (command); |
511 | ||
512 | if (0 < n && command[n - 1] == ' ') | |
513 | command[n - 1] = '\0'; | |
514 | } | |
515 | ||
b34976b6 | 516 | return TRUE; |
38701953 AM |
517 | } |
518 | \f | |
519 | /* Functions for the i386 ELF linker. | |
520 | ||
521 | In order to gain some understanding of code in this file without | |
522 | knowing all the intricate details of the linker, note the | |
523 | following: | |
524 | ||
525 | Functions named elf_i386_* are called by external routines, other | |
526 | functions are only called locally. elf_i386_* functions appear | |
527 | in this file more or less in the order in which they are called | |
528 | from external routines. eg. elf_i386_check_relocs is called | |
529 | early in the link process, elf_i386_finish_dynamic_sections is | |
530 | one of the last functions. */ | |
531 | ||
252b5132 RH |
532 | |
533 | /* The name of the dynamic interpreter. This is put in the .interp | |
534 | section. */ | |
535 | ||
536 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
537 | ||
a23b6845 AM |
538 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
539 | copying dynamic variables from a shared lib into an app's dynbss | |
540 | section, and instead use a dynamic relocation to point into the | |
541 | shared lib. */ | |
542 | #define ELIMINATE_COPY_RELOCS 1 | |
543 | ||
f604c2a2 | 544 | /* The size in bytes of an entry in the lazy procedure linkage table. */ |
252b5132 | 545 | |
f604c2a2 | 546 | #define LAZY_PLT_ENTRY_SIZE 16 |
252b5132 | 547 | |
f604c2a2 L |
548 | /* The size in bytes of an entry in the non-lazy procedure linkage |
549 | table. */ | |
252b5132 | 550 | |
f604c2a2 L |
551 | #define NON_LAZY_PLT_ENTRY_SIZE 8 |
552 | ||
553 | /* The first entry in an absolute lazy procedure linkage table looks | |
554 | like this. See the SVR4 ABI i386 supplement to see how this works. | |
555 | Will be padded to LAZY_PLT_ENTRY_SIZE with lazy_plt->plt0_pad_byte. */ | |
556 | ||
557 | static const bfd_byte elf_i386_lazy_plt0_entry[12] = | |
252b5132 RH |
558 | { |
559 | 0xff, 0x35, /* pushl contents of address */ | |
560 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
561 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 562 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
563 | }; |
564 | ||
f604c2a2 L |
565 | /* Subsequent entries in an absolute lazy procedure linkage table look |
566 | like this. */ | |
252b5132 | 567 | |
f604c2a2 | 568 | static const bfd_byte elf_i386_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
569 | { |
570 | 0xff, 0x25, /* jmp indirect */ | |
571 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
572 | 0x68, /* pushl immediate */ | |
573 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
574 | 0xe9, /* jmp relative */ | |
575 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
576 | }; | |
577 | ||
f604c2a2 L |
578 | /* The first entry in a PIC lazy procedure linkage table look like |
579 | this. Will be padded to LAZY_PLT_ENTRY_SIZE with | |
580 | lazy_plt->plt0_pad_byte. */ | |
252b5132 | 581 | |
f604c2a2 | 582 | static const bfd_byte elf_i386_pic_lazy_plt0_entry[12] = |
252b5132 RH |
583 | { |
584 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 585 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
586 | }; |
587 | ||
f604c2a2 L |
588 | /* Subsequent entries in a PIC lazy procedure linkage table look like |
589 | this. */ | |
252b5132 | 590 | |
f604c2a2 | 591 | static const bfd_byte elf_i386_pic_lazy_plt_entry[LAZY_PLT_ENTRY_SIZE] = |
252b5132 RH |
592 | { |
593 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
594 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
595 | 0x68, /* pushl immediate */ | |
596 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
597 | 0xe9, /* jmp relative */ | |
598 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
599 | }; | |
600 | ||
f604c2a2 | 601 | /* Entries in the non-lazy procedure linkage table look like this. */ |
dd7e64d4 | 602 | |
f604c2a2 | 603 | static const bfd_byte elf_i386_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
604 | { |
605 | 0xff, 0x25, /* jmp indirect */ | |
606 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
607 | 0x66, 0x90 /* xchg %ax,%ax */ | |
608 | }; | |
609 | ||
f604c2a2 L |
610 | /* Entries in the PIC non-lazy procedure linkage table look like |
611 | this. */ | |
dd7e64d4 | 612 | |
f604c2a2 | 613 | static const bfd_byte elf_i386_pic_non_lazy_plt_entry[NON_LAZY_PLT_ENTRY_SIZE] = |
dd7e64d4 L |
614 | { |
615 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
616 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
617 | 0x66, 0x90 /* xchg %ax,%ax */ | |
618 | }; | |
619 | ||
f604c2a2 | 620 | /* .eh_frame covering the lazy .plt section. */ |
e41b3a13 | 621 | |
f604c2a2 | 622 | static const bfd_byte elf_i386_eh_frame_lazy_plt[] = |
e41b3a13 JJ |
623 | { |
624 | #define PLT_CIE_LENGTH 20 | |
625 | #define PLT_FDE_LENGTH 36 | |
626 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
627 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
628 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
629 | 0, 0, 0, 0, /* CIE ID */ | |
630 | 1, /* CIE version */ | |
631 | 'z', 'R', 0, /* Augmentation string */ | |
632 | 1, /* Code alignment factor */ | |
633 | 0x7c, /* Data alignment factor */ | |
634 | 8, /* Return address column */ | |
635 | 1, /* Augmentation size */ | |
636 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
637 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
638 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
639 | DW_CFA_nop, DW_CFA_nop, | |
640 | ||
641 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
642 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
643 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
644 | 0, 0, 0, 0, /* .plt size goes here */ | |
645 | 0, /* Augmentation size */ | |
646 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
647 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
648 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
649 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
650 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
651 | 11, /* Block length */ | |
652 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
653 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
654 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 655 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
656 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
657 | }; | |
658 | ||
f604c2a2 | 659 | /* .eh_frame covering the non-lazy .plt section. */ |
fff53dae | 660 | |
f604c2a2 | 661 | static const bfd_byte elf_i386_eh_frame_non_lazy_plt[] = |
fff53dae L |
662 | { |
663 | #define PLT_GOT_FDE_LENGTH 16 | |
664 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
665 | 0, 0, 0, 0, /* CIE ID */ | |
666 | 1, /* CIE version */ | |
667 | 'z', 'R', 0, /* Augmentation string */ | |
668 | 1, /* Code alignment factor */ | |
669 | 0x7c, /* Data alignment factor */ | |
670 | 8, /* Return address column */ | |
671 | 1, /* Augmentation size */ | |
672 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
673 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
674 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
675 | DW_CFA_nop, DW_CFA_nop, | |
676 | ||
677 | PLT_GOT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
678 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
f604c2a2 L |
679 | 0, 0, 0, 0, /* the start of non-lazy .plt goes here */ |
680 | 0, 0, 0, 0, /* non-lazy .plt size goes here */ | |
fff53dae L |
681 | 0, /* Augmentation size */ |
682 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop | |
683 | }; | |
684 | ||
f604c2a2 | 685 | struct elf_i386_lazy_plt_layout |
25e762b9 | 686 | { |
f604c2a2 L |
687 | /* The first entry in an absolute lazy procedure linkage table looks |
688 | like this. */ | |
25e762b9 RM |
689 | const bfd_byte *plt0_entry; |
690 | unsigned int plt0_entry_size; | |
691 | ||
f604c2a2 L |
692 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and |
693 | GOT[2]. */ | |
25e762b9 RM |
694 | unsigned int plt0_got1_offset; |
695 | unsigned int plt0_got2_offset; | |
696 | ||
f604c2a2 L |
697 | /* Later entries in an absolute lazy procedure linkage table look |
698 | like this. */ | |
25e762b9 RM |
699 | const bfd_byte *plt_entry; |
700 | unsigned int plt_entry_size; | |
701 | ||
702 | /* Offsets into plt_entry that are to be replaced with... */ | |
703 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
704 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
705 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
706 | ||
f604c2a2 L |
707 | /* Offset into plt_entry where the initial value of the GOT entry |
708 | points. */ | |
25e762b9 RM |
709 | unsigned int plt_lazy_offset; |
710 | ||
f604c2a2 L |
711 | /* The first entry in a PIC lazy procedure linkage table looks like |
712 | this. */ | |
25e762b9 RM |
713 | const bfd_byte *pic_plt0_entry; |
714 | ||
f604c2a2 L |
715 | /* Subsequent entries in a PIC lazy procedure linkage table look |
716 | like this. */ | |
25e762b9 RM |
717 | const bfd_byte *pic_plt_entry; |
718 | ||
f604c2a2 | 719 | /* .eh_frame covering the lazy .plt section. */ |
25e762b9 RM |
720 | const bfd_byte *eh_frame_plt; |
721 | unsigned int eh_frame_plt_size; | |
f604c2a2 | 722 | }; |
fff53dae | 723 | |
f604c2a2 L |
724 | struct elf_i386_non_lazy_plt_layout |
725 | { | |
726 | /* Entries in an absolute non-lazy procedure linkage table look like | |
727 | this. */ | |
728 | const bfd_byte *plt_entry; | |
729 | /* Entries in a PIC non-lazy procedure linkage table look like this. */ | |
730 | const bfd_byte *pic_plt_entry; | |
731 | ||
732 | unsigned int plt_entry_size; | |
733 | ||
734 | /* Offsets into plt_entry that are to be replaced with... */ | |
735 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
736 | ||
737 | /* .eh_frame covering the non-lazy .plt section. */ | |
738 | const bfd_byte *eh_frame_plt; | |
739 | unsigned int eh_frame_plt_size; | |
25e762b9 RM |
740 | }; |
741 | ||
f604c2a2 L |
742 | struct elf_i386_plt_layout |
743 | { | |
744 | /* The first entry in a lazy procedure linkage table looks like this. */ | |
745 | const bfd_byte *plt0_entry; | |
746 | /* Entries in a procedure linkage table look like this. */ | |
747 | const bfd_byte *plt_entry; | |
748 | unsigned int plt_entry_size; | |
749 | ||
750 | /* 1 has PLT0. */ | |
751 | unsigned int has_plt0; | |
752 | ||
753 | /* Offsets into plt_entry that are to be replaced with... */ | |
754 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
755 | ||
756 | /* .eh_frame covering the .plt section. */ | |
757 | const bfd_byte *eh_frame_plt; | |
758 | unsigned int eh_frame_plt_size; | |
759 | }; | |
25e762b9 RM |
760 | |
761 | /* These are the standard parameters. */ | |
f604c2a2 | 762 | static const struct elf_i386_lazy_plt_layout elf_i386_lazy_plt = |
25e762b9 | 763 | { |
f604c2a2 L |
764 | elf_i386_lazy_plt0_entry, /* plt0_entry */ |
765 | sizeof (elf_i386_lazy_plt0_entry), /* plt0_entry_size */ | |
25e762b9 RM |
766 | 2, /* plt0_got1_offset */ |
767 | 8, /* plt0_got2_offset */ | |
f604c2a2 L |
768 | elf_i386_lazy_plt_entry, /* plt_entry */ |
769 | LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
25e762b9 RM |
770 | 2, /* plt_got_offset */ |
771 | 7, /* plt_reloc_offset */ | |
772 | 12, /* plt_plt_offset */ | |
773 | 6, /* plt_lazy_offset */ | |
f604c2a2 L |
774 | elf_i386_pic_lazy_plt0_entry, /* pic_plt0_entry */ |
775 | elf_i386_pic_lazy_plt_entry, /* pic_plt_entry */ | |
776 | elf_i386_eh_frame_lazy_plt, /* eh_frame_plt */ | |
777 | sizeof (elf_i386_eh_frame_lazy_plt) /* eh_frame_plt_size */ | |
778 | }; | |
779 | ||
780 | static const struct elf_i386_non_lazy_plt_layout elf_i386_non_lazy_plt = | |
781 | { | |
782 | elf_i386_non_lazy_plt_entry, /* plt_entry */ | |
783 | elf_i386_pic_non_lazy_plt_entry, /* pic_plt_entry */ | |
784 | NON_LAZY_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
785 | 2, /* plt_got_offset */ | |
786 | elf_i386_eh_frame_non_lazy_plt, /* eh_frame_plt */ | |
787 | sizeof (elf_i386_eh_frame_non_lazy_plt) /* eh_frame_plt_size */ | |
25e762b9 RM |
788 | }; |
789 | \f | |
790 | ||
eac338cf PB |
791 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
792 | for the PLTResolve stub and then for each PLT entry. */ | |
793 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
794 | #define PLTRESOLVE_RELOCS 2 | |
795 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
796 | ||
23209a78 RM |
797 | /* Architecture-specific backend data for i386. */ |
798 | ||
799 | struct elf_i386_backend_data | |
800 | { | |
801 | /* Value used to fill the unused bytes of the first PLT entry. */ | |
802 | bfd_byte plt0_pad_byte; | |
803 | ||
f604c2a2 L |
804 | /* Target system. */ |
805 | enum | |
806 | { | |
807 | is_normal, | |
808 | is_vxworks, | |
809 | is_nacl | |
810 | } os; | |
23209a78 RM |
811 | }; |
812 | ||
813 | #define get_elf_i386_backend_data(abfd) \ | |
814 | ((const struct elf_i386_backend_data *) \ | |
815 | get_elf_backend_data (abfd)->arch_data) | |
816 | ||
817 | /* These are the standard parameters. */ | |
818 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
819 | { | |
820 | 0, /* plt0_pad_byte */ | |
f604c2a2 | 821 | is_normal /* os */ |
23209a78 RM |
822 | }; |
823 | ||
824 | #define elf_backend_arch_data &elf_i386_arch_bed | |
825 | ||
aec6b87e L |
826 | /* Is a undefined weak symbol which is resolved to 0. Reference to an |
827 | undefined weak symbol is resolved to 0 when building executable if | |
828 | it isn't dynamic and | |
829 | 1. Has non-GOT/non-PLT relocations in text section. Or | |
830 | 2. Has no GOT/PLT relocation. | |
831 | */ | |
e62b9723 | 832 | #define UNDEFINED_WEAK_RESOLVED_TO_ZERO(INFO, GOT_RELOC, EH) \ |
aec6b87e L |
833 | ((EH)->elf.root.type == bfd_link_hash_undefweak \ |
834 | && bfd_link_executable (INFO) \ | |
835 | && (elf_i386_hash_table (INFO)->interp == NULL \ | |
e62b9723 | 836 | || !(GOT_RELOC) \ |
aec6b87e L |
837 | || (EH)->has_non_got_reloc \ |
838 | || !(INFO)->dynamic_undefined_weak)) | |
839 | ||
252b5132 RH |
840 | /* i386 ELF linker hash entry. */ |
841 | ||
842 | struct elf_i386_link_hash_entry | |
843 | { | |
ebe50bae | 844 | struct elf_link_hash_entry elf; |
252b5132 | 845 | |
0c715baa | 846 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 847 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 848 | |
37e55690 JJ |
849 | #define GOT_UNKNOWN 0 |
850 | #define GOT_NORMAL 1 | |
851 | #define GOT_TLS_GD 2 | |
852 | #define GOT_TLS_IE 4 | |
853 | #define GOT_TLS_IE_POS 5 | |
854 | #define GOT_TLS_IE_NEG 6 | |
855 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
856 | #define GOT_TLS_GDESC 8 |
857 | #define GOT_TLS_GD_BOTH_P(type) \ | |
858 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
859 | #define GOT_TLS_GD_P(type) \ | |
860 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
861 | #define GOT_TLS_GDESC_P(type) \ | |
862 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
863 | #define GOT_TLS_GD_ANY_P(type) \ | |
864 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 865 | unsigned char tls_type; |
67a4f2b7 | 866 | |
d5597ebc L |
867 | /* Symbol is referenced by R_386_GOTOFF relocation. */ |
868 | unsigned int gotoff_ref : 1; | |
869 | ||
aec6b87e L |
870 | /* Symbol has GOT or PLT relocations. */ |
871 | unsigned int has_got_reloc : 1; | |
872 | ||
873 | /* Symbol has non-GOT/non-PLT relocations in text sections. */ | |
874 | unsigned int has_non_got_reloc : 1; | |
875 | ||
e133d005 L |
876 | /* Don't call finish_dynamic_symbol on this symbol. */ |
877 | unsigned int no_finish_dynamic_symbol : 1; | |
878 | ||
6eaa7fb5 L |
879 | /* 0: symbol isn't ___tls_get_addr. |
880 | 1: symbol is ___tls_get_addr. | |
881 | 2: symbol is unknown. */ | |
882 | unsigned int tls_get_addr : 2; | |
883 | ||
04ebc307 L |
884 | /* Reference count of C/C++ function pointer relocations in read-write |
885 | section which can be resolved at run-time. */ | |
886 | bfd_signed_vma func_pointer_refcount; | |
887 | ||
dd7e64d4 L |
888 | /* Information about the GOT PLT entry. Filled when there are both |
889 | GOT and PLT relocations against the same function. */ | |
890 | union gotplt_union plt_got; | |
891 | ||
67a4f2b7 AO |
892 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, |
893 | starting at the end of the jump table. */ | |
894 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
895 | }; |
896 | ||
897 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
898 | ||
899 | struct elf_i386_obj_tdata | |
900 | { | |
901 | struct elf_obj_tdata root; | |
902 | ||
903 | /* tls_type for each local got entry. */ | |
904 | char *local_got_tls_type; | |
67a4f2b7 AO |
905 | |
906 | /* GOTPLT entries for TLS descriptors. */ | |
907 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
908 | }; |
909 | ||
13ae64f3 JJ |
910 | #define elf_i386_tdata(abfd) \ |
911 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
912 | ||
913 | #define elf_i386_local_got_tls_type(abfd) \ | |
914 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
915 | ||
67a4f2b7 AO |
916 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
917 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
918 | ||
0ffa91dd NC |
919 | #define is_i386_elf(bfd) \ |
920 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
921 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 922 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 923 | |
b34976b6 | 924 | static bfd_boolean |
55fd94b0 | 925 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 926 | { |
0ffa91dd | 927 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 928 | I386_ELF_DATA); |
13ae64f3 | 929 | } |
cedb70c5 | 930 | |
252b5132 RH |
931 | /* i386 ELF linker hash table. */ |
932 | ||
933 | struct elf_i386_link_hash_table | |
934 | { | |
ebe50bae | 935 | struct elf_link_hash_table elf; |
252b5132 | 936 | |
6725bdbf | 937 | /* Short-cuts to get to dynamic linker sections. */ |
aec6b87e | 938 | asection *interp; |
e41b3a13 | 939 | asection *plt_eh_frame; |
dd7e64d4 | 940 | asection *plt_got; |
fff53dae | 941 | asection *plt_got_eh_frame; |
9635fe29 | 942 | |
f604c2a2 L |
943 | /* Parameters describing PLT generation. */ |
944 | struct elf_i386_plt_layout plt; | |
945 | ||
946 | /* Parameters describing lazy PLT generation. */ | |
947 | const struct elf_i386_lazy_plt_layout *lazy_plt; | |
948 | ||
949 | /* Parameters describing non-lazy PLT generation. */ | |
950 | const struct elf_i386_non_lazy_plt_layout *non_lazy_plt; | |
951 | ||
4dfe6ac6 NC |
952 | union |
953 | { | |
13ae64f3 JJ |
954 | bfd_signed_vma refcount; |
955 | bfd_vma offset; | |
956 | } tls_ldm_got; | |
957 | ||
67a4f2b7 AO |
958 | /* The amount of space used by the reserved portion of the sgotplt |
959 | section, plus whatever space is used by the jump slots. */ | |
960 | bfd_vma sgotplt_jump_table_size; | |
961 | ||
87d72d41 AM |
962 | /* Small local sym cache. */ |
963 | struct sym_cache sym_cache; | |
9f03412a AO |
964 | |
965 | /* _TLS_MODULE_BASE_ symbol. */ | |
966 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
967 | |
968 | /* Used by local STT_GNU_IFUNC symbols. */ | |
969 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
970 | void * loc_hash_memory; |
971 | ||
972 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
973 | asection *srelplt2; | |
974 | ||
4dfe6ac6 NC |
975 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
976 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
977 | |
978 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
979 | bfd_vma next_jump_slot_index; | |
980 | ||
981 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
982 | bfd_vma next_irelative_index; | |
2df3368d L |
983 | |
984 | /* TRUE if there are dynamic relocs against IFUNC symbols that apply | |
985 | to read-only sections. */ | |
986 | bfd_boolean readonly_dynrelocs_against_ifunc; | |
6725bdbf | 987 | }; |
252b5132 RH |
988 | |
989 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
990 | ||
991 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
992 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
993 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 994 | |
67a4f2b7 | 995 | #define elf_i386_compute_jump_table_size(htab) \ |
998d811a | 996 | ((htab)->elf.srelplt->reloc_count * 4) |
67a4f2b7 | 997 | |
252b5132 RH |
998 | /* Create an entry in an i386 ELF linker hash table. */ |
999 | ||
1000 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
1001 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
1002 | struct bfd_hash_table *table, | |
1003 | const char *string) | |
252b5132 | 1004 | { |
252b5132 RH |
1005 | /* Allocate the structure if it has not already been allocated by a |
1006 | subclass. */ | |
ebe50bae AM |
1007 | if (entry == NULL) |
1008 | { | |
a50b1753 NC |
1009 | entry = (struct bfd_hash_entry *) |
1010 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
1011 | if (entry == NULL) |
1012 | return entry; | |
1013 | } | |
252b5132 RH |
1014 | |
1015 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
1016 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
1017 | if (entry != NULL) | |
252b5132 | 1018 | { |
ebe50bae AM |
1019 | struct elf_i386_link_hash_entry *eh; |
1020 | ||
1021 | eh = (struct elf_i386_link_hash_entry *) entry; | |
1022 | eh->dyn_relocs = NULL; | |
13ae64f3 | 1023 | eh->tls_type = GOT_UNKNOWN; |
d5597ebc | 1024 | eh->gotoff_ref = 0; |
aec6b87e L |
1025 | eh->has_got_reloc = 0; |
1026 | eh->has_non_got_reloc = 0; | |
e133d005 | 1027 | eh->no_finish_dynamic_symbol = 0; |
6eaa7fb5 | 1028 | eh->tls_get_addr = 2; |
04ebc307 | 1029 | eh->func_pointer_refcount = 0; |
dd7e64d4 | 1030 | eh->plt_got.offset = (bfd_vma) -1; |
67a4f2b7 | 1031 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
1032 | } |
1033 | ||
ebe50bae | 1034 | return entry; |
252b5132 RH |
1035 | } |
1036 | ||
c25bc9fc L |
1037 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
1038 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
1039 | as global symbol. We reuse indx and dynstr_index for local symbol | |
1040 | hash since they aren't used by global symbols in this backend. */ | |
1041 | ||
1042 | static hashval_t | |
1043 | elf_i386_local_htab_hash (const void *ptr) | |
1044 | { | |
1045 | struct elf_link_hash_entry *h | |
1046 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 1047 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
1048 | } |
1049 | ||
1050 | /* Compare local hash entries. */ | |
1051 | ||
1052 | static int | |
1053 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
1054 | { | |
1055 | struct elf_link_hash_entry *h1 | |
1056 | = (struct elf_link_hash_entry *) ptr1; | |
1057 | struct elf_link_hash_entry *h2 | |
1058 | = (struct elf_link_hash_entry *) ptr2; | |
1059 | ||
1060 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
1061 | } | |
1062 | ||
1063 | /* Find and/or create a hash entry for local symbol. */ | |
1064 | ||
1065 | static struct elf_link_hash_entry * | |
1066 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
1067 | bfd *abfd, const Elf_Internal_Rela *rel, | |
1068 | bfd_boolean create) | |
1069 | { | |
1070 | struct elf_i386_link_hash_entry e, *ret; | |
1071 | asection *sec = abfd->sections; | |
d2149d72 L |
1072 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
1073 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
1074 | void **slot; |
1075 | ||
1076 | e.elf.indx = sec->id; | |
1077 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
1078 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
1079 | create ? INSERT : NO_INSERT); | |
1080 | ||
1081 | if (!slot) | |
1082 | return NULL; | |
1083 | ||
1084 | if (*slot) | |
1085 | { | |
1086 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
1087 | return &ret->elf; | |
1088 | } | |
1089 | ||
1090 | ret = (struct elf_i386_link_hash_entry *) | |
1091 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
1092 | sizeof (struct elf_i386_link_hash_entry)); | |
1093 | if (ret) | |
1094 | { | |
1095 | memset (ret, 0, sizeof (*ret)); | |
1096 | ret->elf.indx = sec->id; | |
1097 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
1098 | ret->elf.dynindx = -1; | |
04ebc307 | 1099 | ret->func_pointer_refcount = 0; |
dd7e64d4 | 1100 | ret->plt_got.offset = (bfd_vma) -1; |
c25bc9fc L |
1101 | *slot = ret; |
1102 | } | |
1103 | return &ret->elf; | |
1104 | } | |
1105 | ||
68faa637 AM |
1106 | /* Destroy an i386 ELF linker hash table. */ |
1107 | ||
1108 | static void | |
d495ab0d | 1109 | elf_i386_link_hash_table_free (bfd *obfd) |
68faa637 AM |
1110 | { |
1111 | struct elf_i386_link_hash_table *htab | |
d495ab0d | 1112 | = (struct elf_i386_link_hash_table *) obfd->link.hash; |
68faa637 AM |
1113 | |
1114 | if (htab->loc_hash_table) | |
1115 | htab_delete (htab->loc_hash_table); | |
1116 | if (htab->loc_hash_memory) | |
1117 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
d495ab0d | 1118 | _bfd_elf_link_hash_table_free (obfd); |
68faa637 AM |
1119 | } |
1120 | ||
252b5132 RH |
1121 | /* Create an i386 ELF linker hash table. */ |
1122 | ||
1123 | static struct bfd_link_hash_table * | |
55fd94b0 | 1124 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
1125 | { |
1126 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 1127 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 1128 | |
7bf52ea2 | 1129 | ret = (struct elf_i386_link_hash_table *) bfd_zmalloc (amt); |
ebe50bae | 1130 | if (ret == NULL) |
252b5132 RH |
1131 | return NULL; |
1132 | ||
eb4ff4d6 L |
1133 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
1134 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
1135 | sizeof (struct elf_i386_link_hash_entry), |
1136 | I386_ELF_DATA)) | |
252b5132 | 1137 | { |
e2d34d7d | 1138 | free (ret); |
252b5132 RH |
1139 | return NULL; |
1140 | } | |
1141 | ||
c25bc9fc L |
1142 | ret->loc_hash_table = htab_try_create (1024, |
1143 | elf_i386_local_htab_hash, | |
1144 | elf_i386_local_htab_eq, | |
1145 | NULL); | |
1146 | ret->loc_hash_memory = objalloc_create (); | |
1147 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
1148 | { | |
d495ab0d | 1149 | elf_i386_link_hash_table_free (abfd); |
c25bc9fc L |
1150 | return NULL; |
1151 | } | |
d495ab0d | 1152 | ret->elf.root.hash_table_free = elf_i386_link_hash_table_free; |
c25bc9fc | 1153 | |
ebe50bae | 1154 | return &ret->elf.root; |
252b5132 RH |
1155 | } |
1156 | ||
ebe50bae AM |
1157 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1158 | ||
51b64d56 | 1159 | static void |
fcfa13d2 | 1160 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1161 | struct elf_link_hash_entry *dir, |
1162 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1163 | { |
1164 | struct elf_i386_link_hash_entry *edir, *eind; | |
1165 | ||
1166 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1167 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1168 | ||
bbd7ec4a | 1169 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1170 | { |
bbd7ec4a AM |
1171 | if (edir->dyn_relocs != NULL) |
1172 | { | |
e03a8ed8 L |
1173 | struct elf_dyn_relocs **pp; |
1174 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1175 | |
fcfa13d2 | 1176 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1177 | list. Merge any entries against the same section. */ |
1178 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1179 | { | |
e03a8ed8 | 1180 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1181 | |
1182 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1183 | if (q->sec == p->sec) | |
1184 | { | |
1185 | q->pc_count += p->pc_count; | |
1186 | q->count += p->count; | |
1187 | *pp = p->next; | |
1188 | break; | |
1189 | } | |
1190 | if (q == NULL) | |
1191 | pp = &p->next; | |
1192 | } | |
1193 | *pp = edir->dyn_relocs; | |
1194 | } | |
1195 | ||
ebe50bae AM |
1196 | edir->dyn_relocs = eind->dyn_relocs; |
1197 | eind->dyn_relocs = NULL; | |
1198 | } | |
ebe50bae | 1199 | |
cd67d266 JJ |
1200 | if (ind->root.type == bfd_link_hash_indirect |
1201 | && dir->got.refcount <= 0) | |
1202 | { | |
1203 | edir->tls_type = eind->tls_type; | |
1204 | eind->tls_type = GOT_UNKNOWN; | |
1205 | } | |
81848ca0 | 1206 | |
d5597ebc L |
1207 | /* Copy gotoff_ref so that elf_i386_adjust_dynamic_symbol will |
1208 | generate a R_386_COPY reloc. */ | |
1209 | edir->gotoff_ref |= eind->gotoff_ref; | |
1210 | ||
aec6b87e L |
1211 | edir->has_got_reloc |= eind->has_got_reloc; |
1212 | edir->has_non_got_reloc |= eind->has_non_got_reloc; | |
1213 | ||
81848ca0 AM |
1214 | if (ELIMINATE_COPY_RELOCS |
1215 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1216 | && dir->dynamic_adjusted) |
1217 | { | |
1218 | /* If called to transfer flags for a weakdef during processing | |
1219 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1220 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
e81830c5 AM |
1221 | if (dir->versioned != versioned_hidden) |
1222 | dir->ref_dynamic |= ind->ref_dynamic; | |
f5385ebf AM |
1223 | dir->ref_regular |= ind->ref_regular; |
1224 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1225 | dir->needs_plt |= ind->needs_plt; | |
1226 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1227 | } | |
81848ca0 | 1228 | else |
04ebc307 L |
1229 | { |
1230 | if (eind->func_pointer_refcount > 0) | |
1231 | { | |
1232 | edir->func_pointer_refcount += eind->func_pointer_refcount; | |
1233 | eind->func_pointer_refcount = 0; | |
1234 | } | |
1235 | ||
1236 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); | |
1237 | } | |
ebe50bae AM |
1238 | } |
1239 | ||
142411ca L |
1240 | /* Return TRUE if the TLS access code sequence support transition |
1241 | from R_TYPE. */ | |
1242 | ||
1243 | static bfd_boolean | |
bedfd056 | 1244 | elf_i386_check_tls_transition (asection *sec, |
142411ca L |
1245 | bfd_byte *contents, |
1246 | Elf_Internal_Shdr *symtab_hdr, | |
1247 | struct elf_link_hash_entry **sym_hashes, | |
1248 | unsigned int r_type, | |
1249 | const Elf_Internal_Rela *rel, | |
1250 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1251 | { |
6eaa7fb5 | 1252 | unsigned int val, type, reg; |
142411ca L |
1253 | unsigned long r_symndx; |
1254 | struct elf_link_hash_entry *h; | |
1255 | bfd_vma offset; | |
6eaa7fb5 L |
1256 | bfd_byte *call; |
1257 | bfd_boolean indirect_call, tls_get_addr; | |
142411ca | 1258 | |
142411ca | 1259 | offset = rel->r_offset; |
13ae64f3 | 1260 | switch (r_type) |
142411ca L |
1261 | { |
1262 | case R_386_TLS_GD: | |
1263 | case R_386_TLS_LDM: | |
1264 | if (offset < 2 || (rel + 1) >= relend) | |
1265 | return FALSE; | |
1266 | ||
6eaa7fb5 L |
1267 | indirect_call = FALSE; |
1268 | call = contents + offset + 4; | |
1269 | val = *(call - 5); | |
1270 | type = *(call - 6); | |
142411ca L |
1271 | if (r_type == R_386_TLS_GD) |
1272 | { | |
09e8c3bf | 1273 | /* Check transition from GD access model. Only |
6eaa7fb5 L |
1274 | leal foo@tlsgd(,%ebx,1), %eax |
1275 | call ___tls_get_addr@PLT | |
1276 | or | |
1277 | leal foo@tlsgd(%ebx) %eax | |
1278 | call ___tls_get_addr@PLT | |
1279 | nop | |
1280 | or | |
1281 | leal foo@tlsgd(%reg), %eax | |
1282 | call *___tls_get_addr@GOT(%reg) | |
1283 | which may be converted to | |
1284 | addr32 call ___tls_get_addr | |
142411ca | 1285 | can transit to different access model. */ |
6eaa7fb5 L |
1286 | if ((offset + 10) > sec->size |
1287 | || (type != 0x8d && type != 0x04)) | |
142411ca L |
1288 | return FALSE; |
1289 | ||
142411ca L |
1290 | if (type == 0x04) |
1291 | { | |
6eaa7fb5 L |
1292 | /* leal foo@tlsgd(,%ebx,1), %eax |
1293 | call ___tls_get_addr@PLT */ | |
142411ca L |
1294 | if (offset < 3) |
1295 | return FALSE; | |
1296 | ||
6eaa7fb5 L |
1297 | if (*(call - 7) != 0x8d |
1298 | || val != 0x1d | |
1299 | || call[0] != 0xe8) | |
142411ca L |
1300 | return FALSE; |
1301 | } | |
1302 | else | |
1303 | { | |
6eaa7fb5 L |
1304 | /* This must be |
1305 | leal foo@tlsgd(%ebx), %eax | |
1306 | call ___tls_get_addr@PLT | |
1307 | nop | |
1308 | or | |
1309 | leal foo@tlsgd(%reg), %eax | |
1310 | call *___tls_get_addr@GOT(%reg) | |
1311 | which may be converted to | |
1312 | addr32 call ___tls_get_addr | |
1313 | ||
1314 | %eax can't be used as the GOT base register since it | |
1315 | is used to pass parameter to ___tls_get_addr. */ | |
1316 | reg = val & 7; | |
1317 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca L |
1318 | return FALSE; |
1319 | ||
6eaa7fb5 L |
1320 | indirect_call = call[0] == 0xff; |
1321 | if (!(reg == 3 && call[0] == 0xe8 && call[5] == 0x90) | |
1322 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1323 | && !(indirect_call | |
1324 | && (call[1] & 0xf8) == 0x90 | |
1325 | && (call[1] & 0x7) == reg)) | |
142411ca L |
1326 | return FALSE; |
1327 | } | |
1328 | } | |
1329 | else | |
1330 | { | |
1331 | /* Check transition from LD access model. Only | |
6eaa7fb5 L |
1332 | leal foo@tlsldm(%ebx), %eax |
1333 | call ___tls_get_addr@PLT | |
1334 | or | |
1335 | leal foo@tlsldm(%reg), %eax | |
1336 | call *___tls_get_addr@GOT(%reg) | |
1337 | which may be converted to | |
1338 | addr32 call ___tls_get_addr | |
142411ca L |
1339 | can transit to different access model. */ |
1340 | if (type != 0x8d || (offset + 9) > sec->size) | |
1341 | return FALSE; | |
1342 | ||
6eaa7fb5 L |
1343 | /* %eax can't be used as the GOT base register since it is |
1344 | used to pass parameter to ___tls_get_addr. */ | |
1345 | reg = val & 7; | |
1346 | if ((val & 0xf8) != 0x80 || reg == 4 || reg == 0) | |
142411ca | 1347 | return FALSE; |
142411ca | 1348 | |
6eaa7fb5 L |
1349 | indirect_call = call[0] == 0xff; |
1350 | if (!(reg == 3 && call[0] == 0xe8) | |
1351 | && !(call[0] == 0x67 && call[1] == 0xe8) | |
1352 | && !(indirect_call | |
1353 | && (call[1] & 0xf8) == 0x90 | |
1354 | && (call[1] & 0x7) == reg)) | |
1355 | return FALSE; | |
1356 | } | |
142411ca L |
1357 | |
1358 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1359 | if (r_symndx < symtab_hdr->sh_info) | |
1360 | return FALSE; | |
1361 | ||
6eaa7fb5 | 1362 | tls_get_addr = FALSE; |
142411ca | 1363 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
6eaa7fb5 L |
1364 | if (h != NULL && h->root.root.string != NULL) |
1365 | { | |
1366 | struct elf_i386_link_hash_entry *eh | |
1367 | = (struct elf_i386_link_hash_entry *) h; | |
1368 | tls_get_addr = eh->tls_get_addr == 1; | |
1369 | if (eh->tls_get_addr > 1) | |
1370 | { | |
1371 | /* Use strncmp to check ___tls_get_addr since | |
1372 | ___tls_get_addr may be versioned. */ | |
1373 | if (strncmp (h->root.root.string, "___tls_get_addr", 15) | |
1374 | == 0) | |
1375 | { | |
1376 | eh->tls_get_addr = 1; | |
1377 | tls_get_addr = TRUE; | |
1378 | } | |
1379 | else | |
1380 | eh->tls_get_addr = 0; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | if (!tls_get_addr) | |
1385 | return FALSE; | |
1386 | else if (indirect_call) | |
1387 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_GOT32X); | |
1388 | else | |
1389 | return (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1390 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
142411ca L |
1391 | |
1392 | case R_386_TLS_IE: | |
1393 | /* Check transition from IE access model: | |
1394 | movl foo@indntpoff(%rip), %eax | |
1395 | movl foo@indntpoff(%rip), %reg | |
1396 | addl foo@indntpoff(%rip), %reg | |
1397 | */ | |
1398 | ||
1399 | if (offset < 1 || (offset + 4) > sec->size) | |
1400 | return FALSE; | |
1401 | ||
1402 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1403 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1404 | if (val == 0xa1) | |
1405 | return TRUE; | |
1406 | ||
1407 | if (offset < 2) | |
1408 | return FALSE; | |
1409 | ||
1410 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1411 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1412 | return ((type == 0x8b || type == 0x03) | |
1413 | && (val & 0xc7) == 0x05); | |
1414 | ||
1415 | case R_386_TLS_GOTIE: | |
1416 | case R_386_TLS_IE_32: | |
1417 | /* Check transition from {IE_32,GOTIE} access model: | |
1418 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1419 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1420 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1421 | */ | |
1422 | ||
1423 | if (offset < 2 || (offset + 4) > sec->size) | |
1424 | return FALSE; | |
1425 | ||
1426 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1427 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1428 | return FALSE; | |
1429 | ||
1430 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1431 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1432 | ||
1433 | case R_386_TLS_GOTDESC: | |
1434 | /* Check transition from GDesc access model: | |
1435 | leal x@tlsdesc(%ebx), %eax | |
1436 | ||
1437 | Make sure it's a leal adding ebx to a 32-bit offset | |
1438 | into any register, although it's probably almost always | |
1439 | going to be eax. */ | |
1440 | ||
1441 | if (offset < 2 || (offset + 4) > sec->size) | |
1442 | return FALSE; | |
1443 | ||
1444 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1445 | return FALSE; | |
1446 | ||
1447 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1448 | return (val & 0xc7) == 0x83; | |
1449 | ||
1450 | case R_386_TLS_DESC_CALL: | |
1451 | /* Check transition from GDesc access model: | |
6eaa7fb5 | 1452 | call *x@tlsdesc(%eax) |
142411ca L |
1453 | */ |
1454 | if (offset + 2 <= sec->size) | |
1455 | { | |
6eaa7fb5 L |
1456 | /* Make sure that it's a call *x@tlsdesc(%eax). */ |
1457 | call = contents + offset; | |
1458 | return call[0] == 0xff && call[1] == 0x10; | |
142411ca L |
1459 | } |
1460 | ||
1461 | return FALSE; | |
1462 | ||
1463 | default: | |
1464 | abort (); | |
1465 | } | |
1466 | } | |
1467 | ||
1468 | /* Return TRUE if the TLS access transition is OK or no transition | |
1469 | will be performed. Update R_TYPE if there is a transition. */ | |
1470 | ||
1471 | static bfd_boolean | |
1472 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1473 | asection *sec, bfd_byte *contents, | |
1474 | Elf_Internal_Shdr *symtab_hdr, | |
1475 | struct elf_link_hash_entry **sym_hashes, | |
1476 | unsigned int *r_type, int tls_type, | |
1477 | const Elf_Internal_Rela *rel, | |
1478 | const Elf_Internal_Rela *relend, | |
4c544807 | 1479 | struct elf_link_hash_entry *h, |
bedfd056 L |
1480 | unsigned long r_symndx, |
1481 | bfd_boolean from_relocate_section) | |
142411ca L |
1482 | { |
1483 | unsigned int from_type = *r_type; | |
1484 | unsigned int to_type = from_type; | |
1485 | bfd_boolean check = TRUE; | |
1486 | ||
bb1cb422 L |
1487 | /* Skip TLS transition for functions. */ |
1488 | if (h != NULL | |
1489 | && (h->type == STT_FUNC | |
1490 | || h->type == STT_GNU_IFUNC)) | |
1491 | return TRUE; | |
1492 | ||
142411ca | 1493 | switch (from_type) |
13ae64f3 JJ |
1494 | { |
1495 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1496 | case R_386_TLS_GOTDESC: |
1497 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1498 | case R_386_TLS_IE_32: |
37e55690 JJ |
1499 | case R_386_TLS_IE: |
1500 | case R_386_TLS_GOTIE: | |
0e1862bb | 1501 | if (bfd_link_executable (info)) |
142411ca L |
1502 | { |
1503 | if (h == NULL) | |
1504 | to_type = R_386_TLS_LE_32; | |
1505 | else if (from_type != R_386_TLS_IE | |
1506 | && from_type != R_386_TLS_GOTIE) | |
1507 | to_type = R_386_TLS_IE_32; | |
1508 | } | |
1509 | ||
bedfd056 L |
1510 | /* When we are called from elf_i386_relocate_section, there may |
1511 | be additional transitions based on TLS_TYPE. */ | |
1512 | if (from_relocate_section) | |
142411ca L |
1513 | { |
1514 | unsigned int new_to_type = to_type; | |
1515 | ||
0e1862bb | 1516 | if (bfd_link_executable (info) |
142411ca L |
1517 | && h != NULL |
1518 | && h->dynindx == -1 | |
1519 | && (tls_type & GOT_TLS_IE)) | |
1520 | new_to_type = R_386_TLS_LE_32; | |
1521 | ||
1522 | if (to_type == R_386_TLS_GD | |
1523 | || to_type == R_386_TLS_GOTDESC | |
1524 | || to_type == R_386_TLS_DESC_CALL) | |
1525 | { | |
1526 | if (tls_type == GOT_TLS_IE_POS) | |
1527 | new_to_type = R_386_TLS_GOTIE; | |
1528 | else if (tls_type & GOT_TLS_IE) | |
1529 | new_to_type = R_386_TLS_IE_32; | |
1530 | } | |
1531 | ||
1532 | /* We checked the transition before when we were called from | |
1533 | elf_i386_check_relocs. We only want to check the new | |
1534 | transition which hasn't been checked before. */ | |
1535 | check = new_to_type != to_type && from_type == to_type; | |
1536 | to_type = new_to_type; | |
1537 | } | |
1538 | ||
1539 | break; | |
1540 | ||
13ae64f3 | 1541 | case R_386_TLS_LDM: |
0e1862bb | 1542 | if (bfd_link_executable (info)) |
142411ca L |
1543 | to_type = R_386_TLS_LE_32; |
1544 | break; | |
1545 | ||
1546 | default: | |
1547 | return TRUE; | |
1548 | } | |
1549 | ||
1550 | /* Return TRUE if there is no transition. */ | |
1551 | if (from_type == to_type) | |
1552 | return TRUE; | |
1553 | ||
1554 | /* Check if the transition can be performed. */ | |
1555 | if (check | |
bedfd056 | 1556 | && ! elf_i386_check_tls_transition (sec, contents, |
142411ca L |
1557 | symtab_hdr, sym_hashes, |
1558 | from_type, rel, relend)) | |
1559 | { | |
2f629d23 | 1560 | reloc_howto_type *from, *to; |
4c544807 | 1561 | const char *name; |
142411ca L |
1562 | |
1563 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1564 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1565 | ||
4c544807 L |
1566 | if (h) |
1567 | name = h->root.root.string; | |
1568 | else | |
1569 | { | |
4c544807 | 1570 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1571 | |
4c544807 | 1572 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1573 | if (htab == NULL) |
1574 | name = "*unknown*"; | |
1575 | else | |
1576 | { | |
1577 | Elf_Internal_Sym *isym; | |
1578 | ||
1579 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1580 | abfd, r_symndx); | |
1581 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1582 | } | |
4c544807 L |
1583 | } |
1584 | ||
4eca0228 | 1585 | _bfd_error_handler |
695344c0 | 1586 | /* xgettext:c-format */ |
142411ca L |
1587 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " |
1588 | "in section `%A' failed"), | |
c08bb8dd AM |
1589 | abfd, from->name, to->name, name, |
1590 | (unsigned long) rel->r_offset, sec); | |
142411ca L |
1591 | bfd_set_error (bfd_error_bad_value); |
1592 | return FALSE; | |
13ae64f3 JJ |
1593 | } |
1594 | ||
142411ca L |
1595 | *r_type = to_type; |
1596 | return TRUE; | |
13ae64f3 JJ |
1597 | } |
1598 | ||
c175a657 L |
1599 | /* With the local symbol, foo, we convert |
1600 | mov foo@GOT[(%reg1)], %reg2 | |
1601 | to | |
1602 | lea foo[@GOTOFF(%reg1)], %reg2 | |
1603 | and convert | |
1604 | call/jmp *foo@GOT[(%reg)] | |
1605 | to | |
1606 | nop call foo/jmp foo nop | |
1607 | When PIC is false, convert | |
1608 | test %reg1, foo@GOT[(%reg2)] | |
1609 | to | |
1610 | test $foo, %reg1 | |
1611 | and convert | |
1612 | binop foo@GOT[(%reg1)], %reg2 | |
1613 | to | |
1614 | binop $foo, %reg2 | |
1615 | where binop is one of adc, add, and, cmp, or, sbb, sub, xor | |
1616 | instructions. */ | |
1617 | ||
1618 | static | |
1619 | bfd_boolean | |
1620 | elf_i386_convert_load_reloc (bfd *abfd, Elf_Internal_Shdr *symtab_hdr, | |
1621 | bfd_byte *contents, | |
1622 | Elf_Internal_Rela *irel, | |
1623 | struct elf_link_hash_entry *h, | |
1624 | bfd_boolean *converted, | |
1625 | struct bfd_link_info *link_info) | |
1626 | { | |
1627 | struct elf_i386_link_hash_table *htab; | |
1628 | unsigned int opcode; | |
1629 | unsigned int modrm; | |
1630 | bfd_boolean baseless; | |
1631 | Elf_Internal_Sym *isym; | |
1632 | unsigned int addend; | |
1633 | unsigned int nop; | |
1634 | bfd_vma nop_offset; | |
1635 | bfd_boolean is_pic; | |
1636 | bfd_boolean to_reloc_32; | |
1637 | unsigned int r_type; | |
1638 | unsigned int r_symndx; | |
1639 | bfd_vma roff = irel->r_offset; | |
1640 | ||
1641 | if (roff < 2) | |
1642 | return TRUE; | |
1643 | ||
7d4d9709 | 1644 | /* Addend for R_386_GOT32X relocations must be 0. */ |
c175a657 L |
1645 | addend = bfd_get_32 (abfd, contents + roff); |
1646 | if (addend != 0) | |
1647 | return TRUE; | |
1648 | ||
1649 | htab = elf_i386_hash_table (link_info); | |
1650 | is_pic = bfd_link_pic (link_info); | |
1651 | ||
1652 | r_type = ELF32_R_TYPE (irel->r_info); | |
1653 | r_symndx = ELF32_R_SYM (irel->r_info); | |
1654 | ||
1655 | modrm = bfd_get_8 (abfd, contents + roff - 1); | |
1656 | baseless = (modrm & 0xc7) == 0x5; | |
1657 | ||
7d4d9709 | 1658 | if (baseless && is_pic) |
c175a657 L |
1659 | { |
1660 | /* For PIC, disallow R_386_GOT32X without a base register | |
7d4d9709 | 1661 | since we don't know what the GOT base is. */ |
c175a657 L |
1662 | const char *name; |
1663 | ||
1664 | if (h == NULL) | |
1665 | { | |
1666 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, abfd, | |
1667 | r_symndx); | |
1668 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1669 | } | |
1670 | else | |
1671 | name = h->root.root.string; | |
1672 | ||
4eca0228 | 1673 | _bfd_error_handler |
695344c0 | 1674 | /* xgettext:c-format */ |
63a5468a AM |
1675 | (_("%B: direct GOT relocation R_386_GOT32X against `%s' without base" |
1676 | " register can not be used when making a shared object"), | |
c175a657 L |
1677 | abfd, name); |
1678 | return FALSE; | |
1679 | } | |
1680 | ||
1681 | opcode = bfd_get_8 (abfd, contents + roff - 2); | |
1682 | ||
c175a657 L |
1683 | /* Convert to R_386_32 if PIC is false or there is no base |
1684 | register. */ | |
1685 | to_reloc_32 = !is_pic || baseless; | |
1686 | ||
7d4d9709 L |
1687 | /* Try to convert R_386_GOT32X. Get the symbol referred to by the |
1688 | reloc. */ | |
c175a657 L |
1689 | if (h == NULL) |
1690 | { | |
1691 | if (opcode == 0x0ff) | |
1692 | /* Convert "call/jmp *foo@GOT[(%reg)]". */ | |
1693 | goto convert_branch; | |
1694 | else | |
1695 | /* Convert "mov foo@GOT[(%reg1)], %reg2", | |
1696 | "test %reg1, foo@GOT(%reg2)" and | |
1697 | "binop foo@GOT[(%reg1)], %reg2". */ | |
1698 | goto convert_load; | |
1699 | } | |
1700 | ||
1701 | /* Undefined weak symbol is only bound locally in executable | |
1702 | and its reference is resolved as 0. */ | |
1703 | if (UNDEFINED_WEAK_RESOLVED_TO_ZERO (link_info, TRUE, | |
1704 | elf_i386_hash_entry (h))) | |
1705 | { | |
1706 | if (opcode == 0xff) | |
1707 | { | |
1708 | /* No direct branch to 0 for PIC. */ | |
1709 | if (is_pic) | |
1710 | return TRUE; | |
1711 | else | |
1712 | goto convert_branch; | |
1713 | } | |
1714 | else | |
1715 | { | |
1716 | /* We can convert load of address 0 to R_386_32. */ | |
1717 | to_reloc_32 = TRUE; | |
1718 | goto convert_load; | |
1719 | } | |
1720 | } | |
1721 | ||
1722 | if (opcode == 0xff) | |
1723 | { | |
1724 | /* We have "call/jmp *foo@GOT[(%reg)]". */ | |
1725 | if ((h->root.type == bfd_link_hash_defined | |
1726 | || h->root.type == bfd_link_hash_defweak) | |
1727 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1728 | { | |
1729 | /* The function is locally defined. */ | |
1730 | convert_branch: | |
1731 | /* Convert R_386_GOT32X to R_386_PC32. */ | |
1732 | if (modrm == 0x15 || (modrm & 0xf8) == 0x90) | |
1733 | { | |
6eaa7fb5 L |
1734 | struct elf_i386_link_hash_entry *eh |
1735 | = (struct elf_i386_link_hash_entry *) h; | |
1736 | ||
c175a657 L |
1737 | /* Convert to "nop call foo". ADDR_PREFIX_OPCODE |
1738 | is a nop prefix. */ | |
1739 | modrm = 0xe8; | |
6eaa7fb5 L |
1740 | /* To support TLS optimization, always use addr32 prefix |
1741 | for "call *___tls_get_addr@GOT(%reg)". */ | |
1742 | if (eh && eh->tls_get_addr == 1) | |
c175a657 | 1743 | { |
6eaa7fb5 L |
1744 | nop = 0x67; |
1745 | nop_offset = irel->r_offset - 2; | |
c175a657 L |
1746 | } |
1747 | else | |
6eaa7fb5 L |
1748 | { |
1749 | nop = link_info->call_nop_byte; | |
1750 | if (link_info->call_nop_as_suffix) | |
1751 | { | |
1752 | nop_offset = roff + 3; | |
1753 | irel->r_offset -= 1; | |
1754 | } | |
1755 | else | |
1756 | nop_offset = roff - 2; | |
1757 | } | |
c175a657 L |
1758 | } |
1759 | else | |
1760 | { | |
1761 | /* Convert to "jmp foo nop". */ | |
1762 | modrm = 0xe9; | |
1763 | nop = NOP_OPCODE; | |
1764 | nop_offset = roff + 3; | |
1765 | irel->r_offset -= 1; | |
1766 | } | |
1767 | ||
1768 | bfd_put_8 (abfd, nop, contents + nop_offset); | |
1769 | bfd_put_8 (abfd, modrm, contents + irel->r_offset - 1); | |
1770 | /* When converting to PC-relative relocation, we | |
1771 | need to adjust addend by -4. */ | |
1772 | bfd_put_32 (abfd, -4, contents + irel->r_offset); | |
1773 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_PC32); | |
1774 | ||
1775 | *converted = TRUE; | |
1776 | } | |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | /* We have "mov foo@GOT[(%re1g)], %reg2", | |
1781 | "test %reg1, foo@GOT(%reg2)" and | |
1782 | "binop foo@GOT[(%reg1)], %reg2". | |
1783 | ||
1784 | Avoid optimizing _DYNAMIC since ld.so may use its | |
1785 | link-time address. */ | |
1786 | if (h == htab->elf.hdynamic) | |
1787 | return TRUE; | |
1788 | ||
1789 | /* def_regular is set by an assignment in a linker script in | |
1790 | bfd_elf_record_link_assignment. */ | |
1791 | if ((h->def_regular | |
1792 | || h->root.type == bfd_link_hash_defined | |
1793 | || h->root.type == bfd_link_hash_defweak) | |
1794 | && SYMBOL_REFERENCES_LOCAL (link_info, h)) | |
1795 | { | |
1796 | convert_load: | |
1797 | if (opcode == 0x8b) | |
1798 | { | |
1799 | if (to_reloc_32) | |
1800 | { | |
1801 | /* Convert "mov foo@GOT[(%reg1)], %reg2" to | |
1802 | "mov $foo, %reg2" with R_386_32. */ | |
1803 | r_type = R_386_32; | |
1804 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1805 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1806 | opcode = 0xc7; | |
1807 | } | |
1808 | else | |
1809 | { | |
1810 | /* Convert "mov foo@GOT(%reg1), %reg2" to | |
1811 | "lea foo@GOTOFF(%reg1), %reg2". */ | |
1812 | r_type = R_386_GOTOFF; | |
1813 | opcode = 0x8d; | |
1814 | } | |
1815 | } | |
1816 | else | |
1817 | { | |
1818 | /* Only R_386_32 is supported. */ | |
1819 | if (!to_reloc_32) | |
1820 | return TRUE; | |
1821 | ||
1822 | if (opcode == 0x85) | |
1823 | { | |
1824 | /* Convert "test %reg1, foo@GOT(%reg2)" to | |
1825 | "test $foo, %reg1". */ | |
1826 | modrm = 0xc0 | (modrm & 0x38) >> 3; | |
1827 | opcode = 0xf7; | |
1828 | } | |
1829 | else | |
1830 | { | |
1831 | /* Convert "binop foo@GOT(%reg1), %reg2" to | |
1832 | "binop $foo, %reg2". */ | |
1833 | modrm = (0xc0 | |
1834 | | (modrm & 0x38) >> 3 | |
1835 | | (opcode & 0x3c)); | |
1836 | opcode = 0x81; | |
1837 | } | |
1838 | bfd_put_8 (abfd, modrm, contents + roff - 1); | |
1839 | r_type = R_386_32; | |
1840 | } | |
1841 | ||
1842 | bfd_put_8 (abfd, opcode, contents + roff - 2); | |
1843 | irel->r_info = ELF32_R_INFO (r_symndx, r_type); | |
1844 | ||
1845 | *converted = TRUE; | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | return TRUE; | |
1850 | } | |
1851 | ||
c1d11331 L |
1852 | /* Rename some of the generic section flags to better document how they |
1853 | are used here. */ | |
c337a162 L |
1854 | #define need_convert_load sec_flg0 |
1855 | #define check_relocs_failed sec_flg1 | |
c1d11331 | 1856 | |
252b5132 | 1857 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1858 | calculate needed space in the global offset table, procedure linkage |
1859 | table, and dynamic reloc sections. */ | |
252b5132 | 1860 | |
b34976b6 | 1861 | static bfd_boolean |
55fd94b0 AM |
1862 | elf_i386_check_relocs (bfd *abfd, |
1863 | struct bfd_link_info *info, | |
1864 | asection *sec, | |
1865 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1866 | { |
6725bdbf | 1867 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1868 | Elf_Internal_Shdr *symtab_hdr; |
1869 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1870 | const Elf_Internal_Rela *rel; |
1871 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1872 | asection *sreloc; |
bedfd056 | 1873 | bfd_byte *contents; |
252b5132 | 1874 | |
0e1862bb | 1875 | if (bfd_link_relocatable (info)) |
b34976b6 | 1876 | return TRUE; |
252b5132 | 1877 | |
081b1afe L |
1878 | /* Don't do anything special with non-loaded, non-alloced sections. |
1879 | In particular, any relocs in such sections should not affect GOT | |
1880 | and PLT reference counting (ie. we don't allow them to create GOT | |
1881 | or PLT entries), there's no possibility or desire to optimize TLS | |
1882 | relocs, and there's not much point in propagating relocs to shared | |
1883 | libs that the dynamic linker won't relocate. */ | |
1884 | if ((sec->flags & SEC_ALLOC) == 0) | |
1885 | return TRUE; | |
1886 | ||
0ffa91dd NC |
1887 | BFD_ASSERT (is_i386_elf (abfd)); |
1888 | ||
6725bdbf | 1889 | htab = elf_i386_hash_table (info); |
4dfe6ac6 | 1890 | if (htab == NULL) |
c337a162 L |
1891 | { |
1892 | sec->check_relocs_failed = 1; | |
1893 | return FALSE; | |
1894 | } | |
4dfe6ac6 | 1895 | |
bedfd056 L |
1896 | /* Get the section contents. */ |
1897 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1898 | contents = elf_section_data (sec)->this_hdr.contents; | |
1899 | else if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1900 | { | |
1901 | sec->check_relocs_failed = 1; | |
1902 | return FALSE; | |
1903 | } | |
1904 | ||
0ffa91dd | 1905 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1906 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1907 | |
252b5132 RH |
1908 | sreloc = NULL; |
1909 | ||
1910 | rel_end = relocs + sec->reloc_count; | |
1911 | for (rel = relocs; rel < rel_end; rel++) | |
1912 | { | |
13ae64f3 | 1913 | unsigned int r_type; |
252b5132 RH |
1914 | unsigned long r_symndx; |
1915 | struct elf_link_hash_entry *h; | |
d5597ebc | 1916 | struct elf_i386_link_hash_entry *eh; |
4c544807 L |
1917 | Elf_Internal_Sym *isym; |
1918 | const char *name; | |
06a6a421 | 1919 | bfd_boolean size_reloc; |
252b5132 RH |
1920 | |
1921 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1922 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1923 | |
d9bc7a44 | 1924 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1925 | { |
695344c0 | 1926 | /* xgettext:c-format */ |
4eca0228 AM |
1927 | _bfd_error_handler (_("%B: bad symbol index: %d"), |
1928 | abfd, r_symndx); | |
c337a162 | 1929 | goto error_return; |
f5f31454 L |
1930 | } |
1931 | ||
252b5132 | 1932 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1933 | { |
1934 | /* A local symbol. */ | |
c2e61a4e L |
1935 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1936 | abfd, r_symndx); | |
1937 | if (isym == NULL) | |
c337a162 | 1938 | goto error_return; |
c25bc9fc L |
1939 | |
1940 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1941 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1942 | { | |
9fff0c39 | 1943 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1944 | if (h == NULL) |
c337a162 | 1945 | goto error_return; |
6bbec505 | 1946 | |
c25bc9fc | 1947 | /* Fake a STT_GNU_IFUNC symbol. */ |
6322e5c5 L |
1948 | h->root.root.string = bfd_elf_sym_name (abfd, symtab_hdr, |
1949 | isym, NULL); | |
c25bc9fc L |
1950 | h->type = STT_GNU_IFUNC; |
1951 | h->def_regular = 1; | |
1952 | h->ref_regular = 1; | |
1953 | h->forced_local = 1; | |
1954 | h->root.type = bfd_link_hash_defined; | |
1955 | } | |
1956 | else | |
1957 | h = NULL; | |
1958 | } | |
252b5132 | 1959 | else |
71cb9464 | 1960 | { |
4c544807 | 1961 | isym = NULL; |
71cb9464 L |
1962 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1963 | while (h->root.type == bfd_link_hash_indirect | |
1964 | || h->root.type == bfd_link_hash_warning) | |
1965 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1966 | } |
cbe950e9 | 1967 | |
d5597ebc | 1968 | eh = (struct elf_i386_link_hash_entry *) h; |
c25bc9fc L |
1969 | if (h != NULL) |
1970 | { | |
f604c2a2 L |
1971 | if (r_type == R_386_GOTOFF) |
1972 | eh->gotoff_ref = 1; | |
cbe950e9 | 1973 | |
ad1e85de L |
1974 | /* It is referenced by a non-shared object. */ |
1975 | h->ref_regular = 1; | |
bc4e12de | 1976 | h->root.non_ir_ref_regular = 1; |
13a2df29 L |
1977 | |
1978 | if (h->type == STT_GNU_IFUNC) | |
1979 | elf_tdata (info->output_bfd)->has_gnu_symbols | |
1980 | |= elf_gnu_symbol_ifunc; | |
71cb9464 | 1981 | } |
252b5132 | 1982 | |
bedfd056 | 1983 | if (! elf_i386_tls_transition (info, abfd, sec, contents, |
142411ca L |
1984 | symtab_hdr, sym_hashes, |
1985 | &r_type, GOT_UNKNOWN, | |
bedfd056 | 1986 | rel, rel_end, h, r_symndx, FALSE)) |
c337a162 | 1987 | goto error_return; |
13ae64f3 JJ |
1988 | |
1989 | switch (r_type) | |
252b5132 | 1990 | { |
37e55690 JJ |
1991 | case R_386_TLS_LDM: |
1992 | htab->tls_ldm_got.refcount += 1; | |
1993 | goto create_got; | |
1994 | ||
1995 | case R_386_PLT32: | |
1996 | /* This symbol requires a procedure linkage table entry. We | |
1997 | actually build the entry in adjust_dynamic_symbol, | |
1998 | because this might be a case of linking PIC code which is | |
1999 | never referenced by a dynamic object, in which case we | |
2000 | don't need to generate a procedure linkage table entry | |
2001 | after all. */ | |
2002 | ||
2003 | /* If this is a local symbol, we resolve it directly without | |
2004 | creating a procedure linkage table entry. */ | |
2005 | if (h == NULL) | |
2006 | continue; | |
2007 | ||
aec6b87e | 2008 | eh->has_got_reloc = 1; |
f5385ebf | 2009 | h->needs_plt = 1; |
37e55690 JJ |
2010 | h->plt.refcount += 1; |
2011 | break; | |
2012 | ||
6a3e1bae | 2013 | case R_386_SIZE32: |
06a6a421 | 2014 | size_reloc = TRUE; |
6a3e1bae L |
2015 | goto do_size; |
2016 | ||
13ae64f3 | 2017 | case R_386_TLS_IE_32: |
37e55690 JJ |
2018 | case R_386_TLS_IE: |
2019 | case R_386_TLS_GOTIE: | |
0e1862bb | 2020 | if (!bfd_link_executable (info)) |
13ae64f3 | 2021 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
2022 | /* Fall through */ |
2023 | ||
252b5132 | 2024 | case R_386_GOT32: |
02a86693 | 2025 | case R_386_GOT32X: |
13ae64f3 | 2026 | case R_386_TLS_GD: |
67a4f2b7 AO |
2027 | case R_386_TLS_GOTDESC: |
2028 | case R_386_TLS_DESC_CALL: | |
252b5132 | 2029 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
2030 | { |
2031 | int tls_type, old_tls_type; | |
2032 | ||
2033 | switch (r_type) | |
2034 | { | |
2035 | default: | |
02a86693 L |
2036 | case R_386_GOT32: |
2037 | case R_386_GOT32X: | |
2038 | tls_type = GOT_NORMAL; | |
2039 | break; | |
13ae64f3 | 2040 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; |
67a4f2b7 AO |
2041 | case R_386_TLS_GOTDESC: |
2042 | case R_386_TLS_DESC_CALL: | |
2043 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
2044 | case R_386_TLS_IE_32: |
2045 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
2046 | tls_type = GOT_TLS_IE_NEG; | |
2047 | else | |
ebcfb3c0 JJ |
2048 | /* If this is a GD->IE transition, we may use either of |
2049 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
2050 | tls_type = GOT_TLS_IE; |
2051 | break; | |
2052 | case R_386_TLS_IE: | |
2053 | case R_386_TLS_GOTIE: | |
2054 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
2055 | } |
2056 | ||
2057 | if (h != NULL) | |
2058 | { | |
2059 | h->got.refcount += 1; | |
2060 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
2061 | } | |
2062 | else | |
2063 | { | |
2064 | bfd_signed_vma *local_got_refcounts; | |
2065 | ||
2066 | /* This is a global offset table entry for a local symbol. */ | |
2067 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2068 | if (local_got_refcounts == NULL) | |
2069 | { | |
2070 | bfd_size_type size; | |
2071 | ||
2072 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
2073 | size *= (sizeof (bfd_signed_vma) |
2074 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
2075 | local_got_refcounts = (bfd_signed_vma *) |
2076 | bfd_zalloc (abfd, size); | |
13ae64f3 | 2077 | if (local_got_refcounts == NULL) |
c337a162 | 2078 | goto error_return; |
13ae64f3 | 2079 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
2080 | elf_i386_local_tlsdesc_gotent (abfd) |
2081 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 2082 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 2083 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
2084 | } |
2085 | local_got_refcounts[r_symndx] += 1; | |
2086 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
2087 | } | |
2088 | ||
37e55690 JJ |
2089 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
2090 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2091 | /* If a TLS symbol is accessed using IE at least once, |
2092 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 2093 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 2094 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 2095 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 2096 | { |
67a4f2b7 | 2097 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 2098 | tls_type = old_tls_type; |
67a4f2b7 AO |
2099 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
2100 | && GOT_TLS_GD_ANY_P (tls_type)) | |
2101 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
2102 | else |
2103 | { | |
09a24cbf | 2104 | if (h) |
4c544807 L |
2105 | name = h->root.root.string; |
2106 | else | |
2107 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
2108 | NULL); | |
4eca0228 | 2109 | _bfd_error_handler |
695344c0 | 2110 | /* xgettext:c-format */ |
d003868e | 2111 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 2112 | "thread local symbol"), |
4c544807 | 2113 | abfd, name); |
68c4a57e | 2114 | bfd_set_error (bfd_error_bad_value); |
c337a162 | 2115 | goto error_return; |
13ae64f3 JJ |
2116 | } |
2117 | } | |
2118 | ||
2119 | if (old_tls_type != tls_type) | |
2120 | { | |
2121 | if (h != NULL) | |
2122 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
2123 | else | |
2124 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
2125 | } | |
2126 | } | |
0ac8d2ca AM |
2127 | /* Fall through */ |
2128 | ||
2129 | case R_386_GOTOFF: | |
2130 | case R_386_GOTPC: | |
13ae64f3 | 2131 | create_got: |
37e55690 | 2132 | if (r_type != R_386_TLS_IE) |
aec6b87e L |
2133 | { |
2134 | if (eh != NULL) | |
2135 | eh->has_got_reloc = 1; | |
2136 | break; | |
2137 | } | |
37e55690 | 2138 | /* Fall through */ |
252b5132 | 2139 | |
37e55690 JJ |
2140 | case R_386_TLS_LE_32: |
2141 | case R_386_TLS_LE: | |
aec6b87e L |
2142 | if (eh != NULL) |
2143 | eh->has_got_reloc = 1; | |
0e1862bb | 2144 | if (bfd_link_executable (info)) |
37e55690 | 2145 | break; |
bffbf940 | 2146 | info->flags |= DF_STATIC_TLS; |
aec6b87e | 2147 | goto do_relocation; |
252b5132 RH |
2148 | |
2149 | case R_386_32: | |
2150 | case R_386_PC32: | |
aec6b87e L |
2151 | if (eh != NULL && (sec->flags & SEC_CODE) != 0) |
2152 | eh->has_non_got_reloc = 1; | |
2153 | do_relocation: | |
bf52d7c7 L |
2154 | /* We are called after all symbols have been resolved. Only |
2155 | relocation against STT_GNU_IFUNC symbol must go through | |
2156 | PLT. */ | |
d1ed1c7d L |
2157 | if (h != NULL |
2158 | && (bfd_link_executable (info) | |
bf52d7c7 | 2159 | || h->type == STT_GNU_IFUNC)) |
6725bdbf | 2160 | { |
12d0ee4a | 2161 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
2162 | need a copy reloc. We can't check reliably at this |
2163 | stage whether the section is read-only, as input | |
2164 | sections have not yet been mapped to output sections. | |
2165 | Tentatively set the flag for now, and correct in | |
2166 | adjust_dynamic_symbol. */ | |
f5385ebf | 2167 | h->non_got_ref = 1; |
12d0ee4a | 2168 | |
233cc9c1 L |
2169 | /* We may need a .plt entry if the symbol is a function |
2170 | defined in a shared lib or is a STT_GNU_IFUNC function | |
2171 | referenced from the code or read-only section. */ | |
2172 | if (!h->def_regular | |
2173 | || (sec->flags & (SEC_CODE | SEC_READONLY)) != 0) | |
2174 | h->plt.refcount += 1; | |
2175 | ||
4b627c18 L |
2176 | if (r_type == R_386_PC32) |
2177 | { | |
2178 | /* Since something like ".long foo - ." may be used | |
2179 | as pointer, make sure that PLT is used if foo is | |
2180 | a function defined in a shared library. */ | |
2181 | if ((sec->flags & SEC_CODE) == 0) | |
2182 | h->pointer_equality_needed = 1; | |
74437ea2 L |
2183 | else if (h->type == STT_GNU_IFUNC |
2184 | && bfd_link_pic (info)) | |
2185 | { | |
6322e5c5 L |
2186 | _bfd_error_handler |
2187 | /* xgettext:c-format */ | |
2188 | (_("%B: unsupported non-PIC call to IFUNC `%s'"), | |
2189 | abfd, h->root.root.string); | |
74437ea2 L |
2190 | bfd_set_error (bfd_error_bad_value); |
2191 | goto error_return; | |
2192 | } | |
4b627c18 L |
2193 | } |
2194 | else | |
04ebc307 L |
2195 | { |
2196 | h->pointer_equality_needed = 1; | |
2197 | /* R_386_32 can be resolved at run-time. */ | |
2198 | if (r_type == R_386_32 | |
2199 | && (sec->flags & SEC_READONLY) == 0) | |
2200 | eh->func_pointer_refcount += 1; | |
2201 | } | |
6725bdbf | 2202 | } |
7843f00e | 2203 | |
06a6a421 | 2204 | size_reloc = FALSE; |
6a3e1bae | 2205 | do_size: |
252b5132 | 2206 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
2207 | against a global symbol, or a non PC relative reloc |
2208 | against a local symbol, then we need to copy the reloc | |
2209 | into the shared library. However, if we are linking with | |
2210 | -Bsymbolic, we do not need to copy a reloc against a | |
2211 | global symbol which is defined in an object we are | |
2212 | including in the link (i.e., DEF_REGULAR is set). At | |
2213 | this point we have not seen all the input files, so it is | |
2214 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
2215 | later (it is never cleared). In case of a weak definition, |
2216 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 2217 | a shared library. We account for that possibility below by |
1f655a09 L |
2218 | storing information in the relocs_copied field of the hash |
2219 | table entry. A similar situation occurs when creating | |
2220 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 2221 | symbol local. |
56882138 | 2222 | |
12d0ee4a AM |
2223 | If on the other hand, we are creating an executable, we |
2224 | may need to keep relocations for symbols satisfied by a | |
2225 | dynamic library if we manage to avoid copy relocs for the | |
233cc9c1 L |
2226 | symbol. |
2227 | ||
2228 | Generate dynamic pointer relocation against STT_GNU_IFUNC | |
2229 | symbol in the non-code section. */ | |
081b1afe L |
2230 | if ((bfd_link_pic (info) |
2231 | && (r_type != R_386_PC32 | |
2232 | || (h != NULL | |
2233 | && (! (bfd_link_pie (info) | |
2234 | || SYMBOLIC_BIND (info, h)) | |
2235 | || h->root.type == bfd_link_hash_defweak | |
2236 | || !h->def_regular)))) | |
233cc9c1 L |
2237 | || (h != NULL |
2238 | && h->type == STT_GNU_IFUNC | |
2239 | && r_type == R_386_32 | |
2240 | && (sec->flags & SEC_CODE) == 0) | |
081b1afe L |
2241 | || (ELIMINATE_COPY_RELOCS |
2242 | && !bfd_link_pic (info) | |
2243 | && h != NULL | |
2244 | && (h->root.type == bfd_link_hash_defweak | |
2245 | || !h->def_regular))) | |
252b5132 | 2246 | { |
e03a8ed8 L |
2247 | struct elf_dyn_relocs *p; |
2248 | struct elf_dyn_relocs **head; | |
ec338859 | 2249 | |
12d0ee4a AM |
2250 | /* We must copy these reloc types into the output file. |
2251 | Create a reloc section in dynobj and make room for | |
2252 | this reloc. */ | |
252b5132 RH |
2253 | if (sreloc == NULL) |
2254 | { | |
83bac4b0 NC |
2255 | sreloc = _bfd_elf_make_dynamic_reloc_section |
2256 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
2257 | ||
252b5132 | 2258 | if (sreloc == NULL) |
c337a162 | 2259 | goto error_return; |
252b5132 RH |
2260 | } |
2261 | ||
0c715baa AM |
2262 | /* If this is a global symbol, we count the number of |
2263 | relocations we need for this symbol. */ | |
2264 | if (h != NULL) | |
252b5132 | 2265 | { |
d5597ebc | 2266 | head = &eh->dyn_relocs; |
0c715baa AM |
2267 | } |
2268 | else | |
2269 | { | |
ec338859 AM |
2270 | /* Track dynamic relocs needed for local syms too. |
2271 | We really need local syms available to do this | |
2272 | easily. Oh well. */ | |
87d72d41 | 2273 | void **vpp; |
ec338859 | 2274 | asection *s; |
87d72d41 AM |
2275 | |
2276 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2277 | abfd, r_symndx); | |
2278 | if (isym == NULL) | |
c337a162 | 2279 | goto error_return; |
87d72d41 AM |
2280 | |
2281 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 2282 | if (s == NULL) |
87d72d41 | 2283 | s = sec; |
ec338859 | 2284 | |
e81d3500 | 2285 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 2286 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
2287 | } |
2288 | ||
2289 | p = *head; | |
2290 | if (p == NULL || p->sec != sec) | |
2291 | { | |
2292 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
2293 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
2294 | amt); | |
ec338859 | 2295 | if (p == NULL) |
c337a162 | 2296 | goto error_return; |
ec338859 AM |
2297 | p->next = *head; |
2298 | *head = p; | |
2299 | p->sec = sec; | |
2300 | p->count = 0; | |
2301 | p->pc_count = 0; | |
252b5132 | 2302 | } |
ec338859 AM |
2303 | |
2304 | p->count += 1; | |
06a6a421 L |
2305 | /* Count size relocation as PC-relative relocation. */ |
2306 | if (r_type == R_386_PC32 || size_reloc) | |
ec338859 | 2307 | p->pc_count += 1; |
252b5132 | 2308 | } |
252b5132 RH |
2309 | break; |
2310 | ||
2311 | /* This relocation describes the C++ object vtable hierarchy. | |
2312 | Reconstruct it for later use during GC. */ | |
2313 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 2314 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c337a162 | 2315 | goto error_return; |
252b5132 RH |
2316 | break; |
2317 | ||
2318 | /* This relocation describes which C++ vtable entries are actually | |
2319 | used. Record for later use during GC. */ | |
2320 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
2321 | BFD_ASSERT (h != NULL); |
2322 | if (h != NULL | |
2323 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c337a162 | 2324 | goto error_return; |
252b5132 RH |
2325 | break; |
2326 | ||
2327 | default: | |
2328 | break; | |
2329 | } | |
dd7e64d4 | 2330 | |
52bf37dd | 2331 | if (r_type == R_386_GOT32X |
c1d11331 | 2332 | && (h == NULL || h->type != STT_GNU_IFUNC)) |
02a86693 | 2333 | sec->need_convert_load = 1; |
252b5132 RH |
2334 | } |
2335 | ||
bedfd056 L |
2336 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2337 | { | |
2338 | if (!info->keep_memory) | |
2339 | free (contents); | |
2340 | else | |
2341 | { | |
2342 | /* Cache the section contents for elf_link_input_bfd. */ | |
2343 | elf_section_data (sec)->this_hdr.contents = contents; | |
2344 | } | |
2345 | } | |
2346 | ||
b34976b6 | 2347 | return TRUE; |
c337a162 L |
2348 | |
2349 | error_return: | |
bedfd056 L |
2350 | if (elf_section_data (sec)->this_hdr.contents != contents) |
2351 | free (contents); | |
c337a162 L |
2352 | sec->check_relocs_failed = 1; |
2353 | return FALSE; | |
252b5132 RH |
2354 | } |
2355 | ||
2356 | /* Return the section that should be marked against GC for a given | |
2357 | relocation. */ | |
2358 | ||
2359 | static asection * | |
55fd94b0 | 2360 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 2361 | struct bfd_link_info *info, |
55fd94b0 AM |
2362 | Elf_Internal_Rela *rel, |
2363 | struct elf_link_hash_entry *h, | |
2364 | Elf_Internal_Sym *sym) | |
252b5132 RH |
2365 | { |
2366 | if (h != NULL) | |
07adf181 AM |
2367 | switch (ELF32_R_TYPE (rel->r_info)) |
2368 | { | |
2369 | case R_386_GNU_VTINHERIT: | |
2370 | case R_386_GNU_VTENTRY: | |
2371 | return NULL; | |
2372 | } | |
2373 | ||
2374 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
2375 | } |
2376 | ||
aec6b87e L |
2377 | /* Remove undefined weak symbol from the dynamic symbol table if it |
2378 | is resolved to 0. */ | |
2379 | ||
2380 | static bfd_boolean | |
2381 | elf_i386_fixup_symbol (struct bfd_link_info *info, | |
2382 | struct elf_link_hash_entry *h) | |
2383 | { | |
2384 | if (h->dynindx != -1 | |
2385 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, | |
e62b9723 | 2386 | elf_i386_hash_entry (h)->has_got_reloc, |
aec6b87e L |
2387 | elf_i386_hash_entry (h))) |
2388 | { | |
2389 | h->dynindx = -1; | |
2390 | _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr, | |
2391 | h->dynstr_index); | |
2392 | } | |
2393 | return TRUE; | |
2394 | } | |
2395 | ||
252b5132 RH |
2396 | /* Adjust a symbol defined by a dynamic object and referenced by a |
2397 | regular object. The current definition is in some section of the | |
2398 | dynamic object, but we're not including those sections. We have to | |
2399 | change the definition to something the rest of the link can | |
2400 | understand. */ | |
2401 | ||
b34976b6 | 2402 | static bfd_boolean |
55fd94b0 AM |
2403 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2404 | struct elf_link_hash_entry *h) | |
252b5132 | 2405 | { |
6725bdbf | 2406 | struct elf_i386_link_hash_table *htab; |
5474d94f | 2407 | asection *s, *srel; |
5ca5bb35 L |
2408 | struct elf_i386_link_hash_entry *eh; |
2409 | struct elf_dyn_relocs *p; | |
252b5132 | 2410 | |
cbe950e9 L |
2411 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2412 | if (h->type == STT_GNU_IFUNC) | |
2413 | { | |
73bcf233 L |
2414 | /* All local STT_GNU_IFUNC references must be treate as local |
2415 | calls via local PLT. */ | |
5ca5bb35 L |
2416 | if (h->ref_regular |
2417 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2418 | { | |
73bcf233 | 2419 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2420 | struct elf_dyn_relocs **pp; |
2421 | ||
2422 | eh = (struct elf_i386_link_hash_entry *) h; | |
2423 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2424 | { | |
2425 | pc_count += p->pc_count; | |
2426 | p->count -= p->pc_count; | |
2427 | p->pc_count = 0; | |
73bcf233 | 2428 | count += p->count; |
5ca5bb35 L |
2429 | if (p->count == 0) |
2430 | *pp = p->next; | |
2431 | else | |
2432 | pp = &p->next; | |
2433 | } | |
2434 | ||
73bcf233 | 2435 | if (pc_count || count) |
5ca5bb35 | 2436 | { |
5ca5bb35 | 2437 | h->non_got_ref = 1; |
233cc9c1 L |
2438 | if (pc_count) |
2439 | { | |
2440 | /* Increment PLT reference count only for PC-relative | |
2441 | references. */ | |
2442 | h->needs_plt = 1; | |
2443 | if (h->plt.refcount <= 0) | |
2444 | h->plt.refcount = 1; | |
2445 | else | |
2446 | h->plt.refcount += 1; | |
2447 | } | |
5ca5bb35 L |
2448 | } |
2449 | } | |
2450 | ||
cbe950e9 L |
2451 | if (h->plt.refcount <= 0) |
2452 | { | |
2453 | h->plt.offset = (bfd_vma) -1; | |
2454 | h->needs_plt = 0; | |
2455 | } | |
2456 | return TRUE; | |
2457 | } | |
2458 | ||
252b5132 RH |
2459 | /* If this is a function, put it in the procedure linkage table. We |
2460 | will fill in the contents of the procedure linkage table later, | |
2461 | when we know the address of the .got section. */ | |
2462 | if (h->type == STT_FUNC | |
f5385ebf | 2463 | || h->needs_plt) |
252b5132 | 2464 | { |
6725bdbf | 2465 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2466 | || SYMBOL_CALLS_LOCAL (info, h) |
2467 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2468 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2469 | { |
2470 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2471 | file, but the symbol was never referred to by a dynamic |
2472 | object, or if all references were garbage collected. In | |
2473 | such a case, we don't actually need to build a procedure | |
2474 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2475 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2476 | h->needs_plt = 0; |
252b5132 RH |
2477 | } |
2478 | ||
b34976b6 | 2479 | return TRUE; |
252b5132 | 2480 | } |
6725bdbf AM |
2481 | else |
2482 | /* It's possible that we incorrectly decided a .plt reloc was | |
2483 | needed for an R_386_PC32 reloc to a non-function sym in | |
2484 | check_relocs. We can't decide accurately between function and | |
2485 | non-function syms in check-relocs; Objects loaded later in | |
2486 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2487 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2488 | |
2489 | /* If this is a weak symbol, and there is a real definition, the | |
2490 | processor independent code will have arranged for us to see the | |
2491 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2492 | if (h->u.weakdef != NULL) |
252b5132 | 2493 | { |
f6e332e6 AM |
2494 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2495 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2496 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2497 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2498 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2499 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2500 | return TRUE; |
252b5132 RH |
2501 | } |
2502 | ||
2503 | /* This is a reference to a symbol defined by a dynamic object which | |
2504 | is not a function. */ | |
2505 | ||
2506 | /* If we are creating a shared library, we must presume that the | |
2507 | only references to the symbol are via the global offset table. | |
2508 | For such cases we need not do anything here; the relocations will | |
2509 | be handled correctly by relocate_section. */ | |
0e1862bb | 2510 | if (!bfd_link_executable (info)) |
b34976b6 | 2511 | return TRUE; |
252b5132 | 2512 | |
7843f00e | 2513 | /* If there are no references to this symbol that do not use the |
d5597ebc L |
2514 | GOT nor R_386_GOTOFF relocation, we don't need to generate a copy |
2515 | reloc. */ | |
2516 | eh = (struct elf_i386_link_hash_entry *) h; | |
2517 | if (!h->non_got_ref && !eh->gotoff_ref) | |
b34976b6 | 2518 | return TRUE; |
7843f00e | 2519 | |
8bd621d8 AM |
2520 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2521 | if (info->nocopyreloc) | |
2522 | { | |
f5385ebf | 2523 | h->non_got_ref = 0; |
b34976b6 | 2524 | return TRUE; |
8bd621d8 AM |
2525 | } |
2526 | ||
643796e3 | 2527 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2528 | if (htab == NULL) |
2529 | return FALSE; | |
643796e3 | 2530 | |
d5597ebc L |
2531 | /* If there aren't any dynamic relocs in read-only sections nor |
2532 | R_386_GOTOFF relocation, then we can keep the dynamic relocs and | |
2533 | avoid the copy reloc. This doesn't work on VxWorks, where we can | |
2534 | not have dynamic relocations (other than copy and jump slot | |
2535 | relocations) in an executable. */ | |
23209a78 | 2536 | if (ELIMINATE_COPY_RELOCS |
d5597ebc | 2537 | && !eh->gotoff_ref |
f604c2a2 | 2538 | && get_elf_i386_backend_data (info->output_bfd)->os != is_vxworks) |
ebe50bae | 2539 | { |
a23b6845 AM |
2540 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2541 | { | |
2542 | s = p->sec->output_section; | |
2543 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2544 | break; | |
2545 | } | |
2546 | ||
a23b6845 AM |
2547 | if (p == NULL) |
2548 | { | |
f5385ebf | 2549 | h->non_got_ref = 0; |
a23b6845 AM |
2550 | return TRUE; |
2551 | } | |
ebe50bae AM |
2552 | } |
2553 | ||
252b5132 RH |
2554 | /* We must allocate the symbol in our .dynbss section, which will |
2555 | become part of the .bss section of the executable. There will be | |
2556 | an entry for this symbol in the .dynsym section. The dynamic | |
2557 | object will contain position independent code, so all references | |
2558 | from the dynamic object to this symbol will go through the global | |
2559 | offset table. The dynamic linker will use the .dynsym entry to | |
2560 | determine the address it must put in the global offset table, so | |
2561 | both the dynamic object and the regular object will refer to the | |
2562 | same memory location for the variable. */ | |
2563 | ||
252b5132 RH |
2564 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2565 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2566 | runtime process image. */ |
5474d94f AM |
2567 | if ((h->root.u.def.section->flags & SEC_READONLY) != 0) |
2568 | { | |
2569 | s = htab->elf.sdynrelro; | |
2570 | srel = htab->elf.sreldynrelro; | |
2571 | } | |
2572 | else | |
2573 | { | |
2574 | s = htab->elf.sdynbss; | |
2575 | srel = htab->elf.srelbss; | |
2576 | } | |
1d7e9d18 | 2577 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2578 | { |
5474d94f | 2579 | srel->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2580 | h->needs_copy = 1; |
252b5132 RH |
2581 | } |
2582 | ||
6cabe1ea | 2583 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
252b5132 RH |
2584 | } |
2585 | ||
6725bdbf | 2586 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2587 | dynamic relocs. */ |
6725bdbf | 2588 | |
b34976b6 | 2589 | static bfd_boolean |
eb4ff4d6 | 2590 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2591 | { |
2592 | struct bfd_link_info *info; | |
2593 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2594 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2595 | struct elf_dyn_relocs *p; |
25e762b9 | 2596 | unsigned plt_entry_size; |
aec6b87e | 2597 | bfd_boolean resolved_to_zero; |
f604c2a2 | 2598 | const struct elf_i386_backend_data *bed; |
6725bdbf | 2599 | |
e92d460e | 2600 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2601 | return TRUE; |
6725bdbf | 2602 | |
cbe950e9 | 2603 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2604 | |
6725bdbf AM |
2605 | info = (struct bfd_link_info *) inf; |
2606 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2607 | if (htab == NULL) |
2608 | return FALSE; | |
6725bdbf | 2609 | |
f604c2a2 L |
2610 | bed = get_elf_i386_backend_data (info->output_bfd); |
2611 | ||
2612 | plt_entry_size = htab->plt.plt_entry_size; | |
25e762b9 | 2613 | |
e62b9723 L |
2614 | resolved_to_zero = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
2615 | eh->has_got_reloc, | |
2616 | eh); | |
aec6b87e | 2617 | |
04ebc307 L |
2618 | /* Clear the reference count of function pointer relocations if |
2619 | symbol isn't a normal function. */ | |
2620 | if (h->type != STT_FUNC) | |
2621 | eh->func_pointer_refcount = 0; | |
2622 | ||
dd7e64d4 L |
2623 | /* We can't use the GOT PLT if pointer equality is needed since |
2624 | finish_dynamic_symbol won't clear symbol value and the dynamic | |
2625 | linker won't update the GOT slot. We will get into an infinite | |
2626 | loop at run-time. */ | |
2627 | if (htab->plt_got != NULL | |
2628 | && h->type != STT_GNU_IFUNC | |
2629 | && !h->pointer_equality_needed | |
2630 | && h->plt.refcount > 0 | |
2631 | && h->got.refcount > 0) | |
2632 | { | |
2633 | /* Don't use the regular PLT if there are both GOT and GOTPLT | |
2634 | reloctions. */ | |
2635 | h->plt.offset = (bfd_vma) -1; | |
2636 | ||
2637 | /* Use the GOT PLT. */ | |
2638 | eh->plt_got.refcount = 1; | |
2639 | } | |
2640 | ||
cbe950e9 L |
2641 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2642 | here if it is defined and referenced in a non-shared object. */ | |
2643 | if (h->type == STT_GNU_IFUNC | |
2644 | && h->def_regular) | |
25e762b9 | 2645 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2df3368d L |
2646 | &htab->readonly_dynrelocs_against_ifunc, |
2647 | plt_entry_size, | |
f604c2a2 L |
2648 | (htab->plt.has_plt0 * |
2649 | plt_entry_size), | |
2650 | 4, TRUE); | |
04ebc307 L |
2651 | /* Don't create the PLT entry if there are only function pointer |
2652 | relocations which can be resolved at run-time. */ | |
cbe950e9 | 2653 | else if (htab->elf.dynamic_sections_created |
04ebc307 L |
2654 | && (h->plt.refcount > eh->func_pointer_refcount |
2655 | || eh->plt_got.refcount > 0)) | |
6725bdbf | 2656 | { |
dc2be3d2 | 2657 | bfd_boolean use_plt_got = eh->plt_got.refcount > 0; |
25070364 | 2658 | |
04ebc307 L |
2659 | /* Clear the reference count of function pointer relocations |
2660 | if PLT is used. */ | |
2661 | eh->func_pointer_refcount = 0; | |
2662 | ||
5a15f56f AM |
2663 | /* Make sure this symbol is output as a dynamic symbol. |
2664 | Undefined weak syms won't yet be marked as dynamic. */ | |
2665 | if (h->dynindx == -1 | |
aec6b87e | 2666 | && !h->forced_local |
0dc9a308 L |
2667 | && !resolved_to_zero |
2668 | && h->root.type == bfd_link_hash_undefweak) | |
5a15f56f | 2669 | { |
c152c796 | 2670 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2671 | return FALSE; |
5a15f56f AM |
2672 | } |
2673 | ||
0e1862bb | 2674 | if (bfd_link_pic (info) |
4e795f50 | 2675 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
ced53ee5 | 2676 | { |
6de2ae4a | 2677 | asection *s = htab->elf.splt; |
dd7e64d4 | 2678 | asection *got_s = htab->plt_got; |
6725bdbf | 2679 | |
7c1e8d3e L |
2680 | /* If this is the first .plt entry, make room for the special |
2681 | first entry. The .plt section is used by prelink to undo | |
2682 | prelinking for dynamic relocations. */ | |
2683 | if (s->size == 0) | |
f604c2a2 | 2684 | s->size = htab->plt.has_plt0 * plt_entry_size; |
7c1e8d3e | 2685 | |
dd7e64d4 L |
2686 | if (use_plt_got) |
2687 | eh->plt_got.offset = got_s->size; | |
2688 | else | |
7c1e8d3e | 2689 | h->plt.offset = s->size; |
6725bdbf | 2690 | |
ced53ee5 AM |
2691 | /* If this symbol is not defined in a regular file, and we are |
2692 | not generating a shared library, then set the symbol to this | |
2693 | location in the .plt. This is required to make function | |
2694 | pointers compare as equal between the normal executable and | |
2695 | the shared library. */ | |
0e1862bb | 2696 | if (! bfd_link_pic (info) |
f5385ebf | 2697 | && !h->def_regular) |
ced53ee5 | 2698 | { |
dd7e64d4 L |
2699 | if (use_plt_got) |
2700 | { | |
2701 | /* We need to make a call to the entry of the GOT PLT | |
2702 | instead of regular PLT entry. */ | |
2703 | h->root.u.def.section = got_s; | |
2704 | h->root.u.def.value = eh->plt_got.offset; | |
2705 | } | |
2706 | else | |
2707 | { | |
2708 | h->root.u.def.section = s; | |
2709 | h->root.u.def.value = h->plt.offset; | |
2710 | } | |
ced53ee5 | 2711 | } |
6725bdbf | 2712 | |
ced53ee5 | 2713 | /* Make room for this entry. */ |
dd7e64d4 | 2714 | if (use_plt_got) |
f604c2a2 | 2715 | got_s->size += htab->non_lazy_plt->plt_entry_size; |
dd7e64d4 L |
2716 | else |
2717 | { | |
2718 | s->size += plt_entry_size; | |
6725bdbf | 2719 | |
dd7e64d4 L |
2720 | /* We also need to make an entry in the .got.plt section, |
2721 | which will be placed in the .got section by the linker | |
2722 | script. */ | |
2723 | htab->elf.sgotplt->size += 4; | |
6725bdbf | 2724 | |
aec6b87e L |
2725 | /* There should be no PLT relocation against resolved |
2726 | undefined weak symbol in executable. */ | |
2727 | if (!resolved_to_zero) | |
2728 | { | |
2729 | /* We also need to make an entry in the .rel.plt | |
2730 | section. */ | |
2731 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); | |
2732 | htab->elf.srelplt->reloc_count++; | |
2733 | } | |
dd7e64d4 | 2734 | } |
eac338cf | 2735 | |
f604c2a2 | 2736 | if (bed->os == is_vxworks && !bfd_link_pic (info)) |
eac338cf PB |
2737 | { |
2738 | /* VxWorks has a second set of relocations for each PLT entry | |
2739 | in executables. They go in a separate relocation section, | |
2740 | which is processed by the kernel loader. */ | |
2741 | ||
2742 | /* There are two relocations for the initial PLT entry: an | |
2743 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2744 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2745 | ||
25e762b9 | 2746 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2747 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2748 | ||
2749 | /* There are two extra relocations for each subsequent PLT entry: | |
2750 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2751 | relocation for the PLT entry. */ | |
2752 | ||
2753 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2754 | } | |
6725bdbf | 2755 | } |
ced53ee5 AM |
2756 | else |
2757 | { | |
13f42277 | 2758 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2759 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2760 | h->needs_plt = 0; |
ced53ee5 | 2761 | } |
6725bdbf AM |
2762 | } |
2763 | else | |
2764 | { | |
13f42277 | 2765 | eh->plt_got.offset = (bfd_vma) -1; |
51b64d56 | 2766 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2767 | h->needs_plt = 0; |
6725bdbf AM |
2768 | } |
2769 | ||
67a4f2b7 AO |
2770 | eh->tlsdesc_got = (bfd_vma) -1; |
2771 | ||
37e55690 | 2772 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2773 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2774 | if (h->got.refcount > 0 | |
0e1862bb | 2775 | && bfd_link_executable (info) |
13ae64f3 | 2776 | && h->dynindx == -1 |
37e55690 | 2777 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2778 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2779 | else if (h->got.refcount > 0) |
6725bdbf | 2780 | { |
0ac8d2ca | 2781 | asection *s; |
b34976b6 | 2782 | bfd_boolean dyn; |
13ae64f3 | 2783 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2784 | |
5a15f56f | 2785 | /* Make sure this symbol is output as a dynamic symbol. |
0dc9a308 | 2786 | Undefined weak syms won't yet be marked as dynamic. */ |
5a15f56f | 2787 | if (h->dynindx == -1 |
aec6b87e | 2788 | && !h->forced_local |
e133d005 | 2789 | && !resolved_to_zero |
0dc9a308 | 2790 | && h->root.type == bfd_link_hash_undefweak) |
5a15f56f | 2791 | { |
c152c796 | 2792 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2793 | return FALSE; |
5a15f56f AM |
2794 | } |
2795 | ||
6de2ae4a | 2796 | s = htab->elf.sgot; |
67a4f2b7 AO |
2797 | if (GOT_TLS_GDESC_P (tls_type)) |
2798 | { | |
6de2ae4a | 2799 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2800 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2801 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2802 | h->got.offset = (bfd_vma) -2; |
2803 | } | |
2804 | if (! GOT_TLS_GDESC_P (tls_type) | |
2805 | || GOT_TLS_GD_P (tls_type)) | |
2806 | { | |
2807 | h->got.offset = s->size; | |
2808 | s->size += 4; | |
2809 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2810 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2811 | s->size += 4; | |
2812 | } | |
ebe50bae | 2813 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2814 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2815 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2816 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2817 | need two), R_386_TLS_GD needs one if local symbol and two if | |
aec6b87e L |
2818 | global. No dynamic relocation against resolved undefined weak |
2819 | symbol in executable. */ | |
37e55690 | 2820 | if (tls_type == GOT_TLS_IE_BOTH) |
6de2ae4a | 2821 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2822 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2823 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2824 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2825 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2826 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2827 | else if (! GOT_TLS_GDESC_P (tls_type) |
aec6b87e L |
2828 | && ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
2829 | && !resolved_to_zero) | |
67a4f2b7 | 2830 | || h->root.type != bfd_link_hash_undefweak) |
0e1862bb | 2831 | && (bfd_link_pic (info) |
ef5aade5 | 2832 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) |
6de2ae4a | 2833 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2834 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2835 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2836 | } |
2837 | else | |
51b64d56 | 2838 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2839 | |
5a15f56f | 2840 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2841 | return TRUE; |
5a15f56f | 2842 | |
0c715baa AM |
2843 | /* In the shared -Bsymbolic case, discard space allocated for |
2844 | dynamic pc-relative relocs against symbols which turn out to be | |
2845 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2846 | space for pc-relative relocs that have become local due to symbol |
2847 | visibility changes. */ | |
0c715baa | 2848 | |
0e1862bb | 2849 | if (bfd_link_pic (info)) |
5a15f56f | 2850 | { |
09695f56 AM |
2851 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2852 | appear on a call or on something like ".long foo - .". We | |
2853 | want calls to protected symbols to resolve directly to the | |
2854 | function rather than going via the plt. If people want | |
2855 | function pointer comparisons to work as expected then they | |
2856 | should avoid writing assembly like ".long foo - .". */ | |
2857 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2858 | { |
e03a8ed8 | 2859 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2860 | |
2861 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2862 | { | |
c3ce498c L |
2863 | p->count -= p->pc_count; |
2864 | p->pc_count = 0; | |
0c715baa AM |
2865 | if (p->count == 0) |
2866 | *pp = p->next; | |
2867 | else | |
2868 | pp = &p->next; | |
2869 | } | |
5a15f56f | 2870 | } |
4e795f50 | 2871 | |
f604c2a2 | 2872 | if (bed->os == is_vxworks) |
3348747a | 2873 | { |
e03a8ed8 | 2874 | struct elf_dyn_relocs **pp; |
3348747a NS |
2875 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2876 | { | |
2877 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2878 | *pp = p->next; | |
2879 | else | |
2880 | pp = &p->next; | |
2881 | } | |
2882 | } | |
2883 | ||
4e795f50 | 2884 | /* Also discard relocs on undefined weak syms with non-default |
aec6b87e | 2885 | visibility or in PIE. */ |
22d606e9 | 2886 | if (eh->dyn_relocs != NULL |
c353e543 | 2887 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 | 2888 | { |
aec6b87e L |
2889 | /* Undefined weak symbol is never bound locally in shared |
2890 | library. */ | |
2891 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2892 | || resolved_to_zero) | |
2893 | { | |
2894 | if (h->non_got_ref) | |
2895 | { | |
2896 | /* Keep dynamic non-GOT/non-PLT relocation so that we | |
2897 | can branch to 0 without PLT. */ | |
2898 | struct elf_dyn_relocs **pp; | |
2899 | ||
2900 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2901 | if (p->pc_count == 0) | |
2902 | *pp = p->next; | |
2903 | else | |
2904 | { | |
2905 | /* Remove non-R_386_PC32 relocation. */ | |
2906 | p->count = p->pc_count; | |
2907 | pp = &p->next; | |
2908 | } | |
22d606e9 | 2909 | |
aec6b87e L |
2910 | if (eh->dyn_relocs != NULL) |
2911 | { | |
2912 | /* Make sure undefined weak symbols are output | |
2913 | as dynamic symbols in PIEs for dynamic non-GOT | |
2914 | non-PLT reloations. */ | |
2915 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2916 | return FALSE; | |
2917 | } | |
2918 | } | |
2919 | else | |
2920 | eh->dyn_relocs = NULL; | |
2921 | } | |
22d606e9 AM |
2922 | else if (h->dynindx == -1 |
2923 | && !h->forced_local) | |
2924 | { | |
2925 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2926 | return FALSE; | |
2927 | } | |
2928 | } | |
0c715baa | 2929 | } |
a23b6845 | 2930 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2931 | { |
2932 | /* For the non-shared case, discard space for relocs against | |
2933 | symbols which turn out to need copy relocs or are not | |
04ebc307 L |
2934 | dynamic. Keep dynamic relocations for run-time function |
2935 | pointer initialization. */ | |
0c715baa | 2936 | |
aec6b87e L |
2937 | if ((!h->non_got_ref |
2938 | || eh->func_pointer_refcount > 0 | |
2939 | || (h->root.type == bfd_link_hash_undefweak | |
2940 | && !resolved_to_zero)) | |
f5385ebf AM |
2941 | && ((h->def_dynamic |
2942 | && !h->def_regular) | |
ebe50bae | 2943 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2944 | && (h->root.type == bfd_link_hash_undefweak |
2945 | || h->root.type == bfd_link_hash_undefined)))) | |
2946 | { | |
2947 | /* Make sure this symbol is output as a dynamic symbol. | |
2948 | Undefined weak syms won't yet be marked as dynamic. */ | |
2949 | if (h->dynindx == -1 | |
aec6b87e | 2950 | && !h->forced_local |
0dc9a308 L |
2951 | && !resolved_to_zero |
2952 | && h->root.type == bfd_link_hash_undefweak) | |
0c715baa | 2953 | { |
c152c796 | 2954 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2955 | return FALSE; |
0c715baa | 2956 | } |
5a15f56f | 2957 | |
0c715baa AM |
2958 | /* If that succeeded, we know we'll be keeping all the |
2959 | relocs. */ | |
2960 | if (h->dynindx != -1) | |
2961 | goto keep; | |
2962 | } | |
2963 | ||
2964 | eh->dyn_relocs = NULL; | |
04ebc307 | 2965 | eh->func_pointer_refcount = 0; |
0c715baa | 2966 | |
ec338859 | 2967 | keep: ; |
5a15f56f AM |
2968 | } |
2969 | ||
0c715baa AM |
2970 | /* Finally, allocate space. */ |
2971 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2972 | { |
e7c33416 NC |
2973 | asection *sreloc; |
2974 | ||
cbe950e9 | 2975 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2976 | |
2977 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2978 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2979 | } |
2980 | ||
b34976b6 | 2981 | return TRUE; |
6725bdbf AM |
2982 | } |
2983 | ||
c25bc9fc L |
2984 | /* Allocate space in .plt, .got and associated reloc sections for |
2985 | local dynamic relocs. */ | |
2986 | ||
2987 | static bfd_boolean | |
2988 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2989 | { | |
2990 | struct elf_link_hash_entry *h | |
2991 | = (struct elf_link_hash_entry *) *slot; | |
2992 | ||
2993 | if (h->type != STT_GNU_IFUNC | |
2994 | || !h->def_regular | |
2995 | || !h->ref_regular | |
2996 | || !h->forced_local | |
2997 | || h->root.type != bfd_link_hash_defined) | |
2998 | abort (); | |
2999 | ||
3000 | return elf_i386_allocate_dynrelocs (h, inf); | |
3001 | } | |
3002 | ||
0c715baa AM |
3003 | /* Find any dynamic relocs that apply to read-only sections. */ |
3004 | ||
b34976b6 | 3005 | static bfd_boolean |
eb4ff4d6 | 3006 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
3007 | { |
3008 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 3009 | struct elf_dyn_relocs *p; |
0c715baa | 3010 | |
aa715242 L |
3011 | /* Skip local IFUNC symbols. */ |
3012 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
3013 | return TRUE; | |
3014 | ||
0c715baa AM |
3015 | eh = (struct elf_i386_link_hash_entry *) h; |
3016 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
3017 | { | |
3018 | asection *s = p->sec->output_section; | |
3019 | ||
3020 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
3021 | { | |
3022 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
3023 | ||
3024 | info->flags |= DF_TEXTREL; | |
3025 | ||
0e1862bb | 3026 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3027 | || info->error_textrel) |
695344c0 | 3028 | /* xgettext:c-format */ |
1952c5cd | 3029 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'\n"), |
b70321a2 L |
3030 | p->sec->owner, h->root.root.string, |
3031 | p->sec); | |
3032 | ||
0c715baa | 3033 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 3034 | return FALSE; |
0c715baa AM |
3035 | } |
3036 | } | |
b34976b6 | 3037 | return TRUE; |
0c715baa AM |
3038 | } |
3039 | ||
c175a657 | 3040 | /* Convert load via the GOT slot to load immediate. */ |
daa67607 L |
3041 | |
3042 | static bfd_boolean | |
02a86693 | 3043 | elf_i386_convert_load (bfd *abfd, asection *sec, |
a6af384b | 3044 | struct bfd_link_info *link_info) |
daa67607 | 3045 | { |
c175a657 | 3046 | struct elf_i386_link_hash_table *htab; |
daa67607 L |
3047 | Elf_Internal_Shdr *symtab_hdr; |
3048 | Elf_Internal_Rela *internal_relocs; | |
3049 | Elf_Internal_Rela *irel, *irelend; | |
3050 | bfd_byte *contents; | |
c175a657 | 3051 | bfd_boolean changed; |
daa67607 L |
3052 | bfd_signed_vma *local_got_refcounts; |
3053 | ||
3054 | /* Don't even try to convert non-ELF outputs. */ | |
3055 | if (!is_elf_hash_table (link_info->hash)) | |
3056 | return FALSE; | |
3057 | ||
c1d11331 | 3058 | /* Nothing to do if there is no need or no output. */ |
daa67607 | 3059 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
02a86693 | 3060 | || sec->need_convert_load == 0 |
c8831961 | 3061 | || bfd_is_abs_section (sec->output_section)) |
daa67607 L |
3062 | return TRUE; |
3063 | ||
3064 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
3065 | ||
3066 | /* Load the relocations for this section. */ | |
3067 | internal_relocs = (_bfd_elf_link_read_relocs | |
3068 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
3069 | link_info->keep_memory)); | |
3070 | if (internal_relocs == NULL) | |
3071 | return FALSE; | |
3072 | ||
c175a657 | 3073 | changed = FALSE; |
daa67607 | 3074 | htab = elf_i386_hash_table (link_info); |
daa67607 L |
3075 | local_got_refcounts = elf_local_got_refcounts (abfd); |
3076 | ||
3077 | /* Get the section contents. */ | |
3078 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
3079 | contents = elf_section_data (sec)->this_hdr.contents; | |
3080 | else | |
3081 | { | |
3082 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
3083 | goto error_return; | |
3084 | } | |
3085 | ||
3086 | irelend = internal_relocs + sec->reloc_count; | |
3087 | for (irel = internal_relocs; irel < irelend; irel++) | |
3088 | { | |
3089 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
c175a657 | 3090 | unsigned int r_symndx; |
daa67607 | 3091 | struct elf_link_hash_entry *h; |
c175a657 | 3092 | bfd_boolean converted; |
daa67607 | 3093 | |
7d4d9709 L |
3094 | /* Don't convert R_386_GOT32 since we can't tell if it is applied |
3095 | to "mov $foo@GOT, %reg" which isn't a load via GOT. */ | |
3096 | if (r_type != R_386_GOT32X) | |
daa67607 L |
3097 | continue; |
3098 | ||
c175a657 | 3099 | r_symndx = ELF32_R_SYM (irel->r_info); |
02a86693 | 3100 | if (r_symndx < symtab_hdr->sh_info) |
c175a657 L |
3101 | h = elf_i386_get_local_sym_hash (htab, sec->owner, |
3102 | (const Elf_Internal_Rela *) irel, | |
3103 | FALSE); | |
3104 | else | |
02a86693 | 3105 | { |
c175a657 L |
3106 | h = elf_sym_hashes (abfd)[r_symndx - symtab_hdr->sh_info]; |
3107 | while (h->root.type == bfd_link_hash_indirect | |
3108 | || h->root.type == bfd_link_hash_warning) | |
3109 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
daa67607 L |
3110 | } |
3111 | ||
02a86693 | 3112 | /* STT_GNU_IFUNC must keep GOT32 relocations. */ |
c175a657 | 3113 | if (h != NULL && h->type == STT_GNU_IFUNC) |
02a86693 L |
3114 | continue; |
3115 | ||
c175a657 L |
3116 | converted = FALSE; |
3117 | if (!elf_i386_convert_load_reloc (abfd, symtab_hdr, contents, | |
3118 | irel, h, &converted, link_info)) | |
3119 | goto error_return; | |
bae420ef | 3120 | |
c175a657 | 3121 | if (converted) |
02a86693 | 3122 | { |
c175a657 L |
3123 | changed = converted; |
3124 | if (h) | |
02a86693 | 3125 | { |
c175a657 L |
3126 | if (h->got.refcount > 0) |
3127 | h->got.refcount -= 1; | |
02a86693 | 3128 | } |
c175a657 | 3129 | else |
02a86693 | 3130 | { |
c175a657 L |
3131 | if (local_got_refcounts != NULL |
3132 | && local_got_refcounts[r_symndx] > 0) | |
3133 | local_got_refcounts[r_symndx] -= 1; | |
02a86693 | 3134 | } |
daa67607 L |
3135 | } |
3136 | } | |
3137 | ||
3138 | if (contents != NULL | |
3139 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3140 | { | |
c175a657 | 3141 | if (!changed && !link_info->keep_memory) |
daa67607 L |
3142 | free (contents); |
3143 | else | |
3144 | { | |
3145 | /* Cache the section contents for elf_link_input_bfd. */ | |
3146 | elf_section_data (sec)->this_hdr.contents = contents; | |
3147 | } | |
3148 | } | |
3149 | ||
3150 | if (elf_section_data (sec)->relocs != internal_relocs) | |
3151 | { | |
c175a657 | 3152 | if (!changed) |
daa67607 L |
3153 | free (internal_relocs); |
3154 | else | |
3155 | elf_section_data (sec)->relocs = internal_relocs; | |
3156 | } | |
3157 | ||
3158 | return TRUE; | |
3159 | ||
3160 | error_return: | |
3161 | if (contents != NULL | |
3162 | && elf_section_data (sec)->this_hdr.contents != contents) | |
3163 | free (contents); | |
3164 | if (internal_relocs != NULL | |
3165 | && elf_section_data (sec)->relocs != internal_relocs) | |
3166 | free (internal_relocs); | |
3167 | return FALSE; | |
3168 | } | |
3169 | ||
252b5132 RH |
3170 | /* Set the sizes of the dynamic sections. */ |
3171 | ||
b34976b6 | 3172 | static bfd_boolean |
23209a78 | 3173 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 3174 | { |
6725bdbf | 3175 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3176 | bfd *dynobj; |
3177 | asection *s; | |
b34976b6 | 3178 | bfd_boolean relocs; |
0c715baa | 3179 | bfd *ibfd; |
252b5132 | 3180 | |
6725bdbf | 3181 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3182 | if (htab == NULL) |
3183 | return FALSE; | |
ebe50bae | 3184 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
3185 | if (dynobj == NULL) |
3186 | abort (); | |
252b5132 | 3187 | |
0c715baa AM |
3188 | /* Set up .got offsets for local syms, and space for local dynamic |
3189 | relocs. */ | |
c72f2fb2 | 3190 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next) |
161d71a6 L |
3191 | { |
3192 | bfd_signed_vma *local_got; | |
3193 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 3194 | char *local_tls_type; |
67a4f2b7 | 3195 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
3196 | bfd_size_type locsymcount; |
3197 | Elf_Internal_Shdr *symtab_hdr; | |
3198 | asection *srel; | |
6725bdbf | 3199 | |
0ffa91dd | 3200 | if (! is_i386_elf (ibfd)) |
161d71a6 | 3201 | continue; |
6725bdbf | 3202 | |
0c715baa AM |
3203 | for (s = ibfd->sections; s != NULL; s = s->next) |
3204 | { | |
e03a8ed8 | 3205 | struct elf_dyn_relocs *p; |
0c715baa | 3206 | |
02a86693 | 3207 | if (!elf_i386_convert_load (ibfd, s, info)) |
daa67607 L |
3208 | return FALSE; |
3209 | ||
e03a8ed8 | 3210 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 3211 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
3212 | p != NULL; |
3213 | p = p->next) | |
0c715baa | 3214 | { |
ec338859 AM |
3215 | if (!bfd_is_abs_section (p->sec) |
3216 | && bfd_is_abs_section (p->sec->output_section)) | |
3217 | { | |
3218 | /* Input section has been discarded, either because | |
3219 | it is a copy of a linkonce section or due to | |
3220 | linker script /DISCARD/, so we'll be discarding | |
3221 | the relocs too. */ | |
3222 | } | |
f604c2a2 L |
3223 | else if ((get_elf_i386_backend_data (output_bfd)->os |
3224 | == is_vxworks) | |
3348747a NS |
3225 | && strcmp (p->sec->output_section->name, |
3226 | ".tls_vars") == 0) | |
3227 | { | |
3228 | /* Relocations in vxworks .tls_vars sections are | |
3229 | handled specially by the loader. */ | |
3230 | } | |
248866a8 | 3231 | else if (p->count != 0) |
ec338859 AM |
3232 | { |
3233 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 3234 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
3235 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
3236 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
3237 | { |
3238 | info->flags |= DF_TEXTREL; | |
0e1862bb | 3239 | if ((info->warn_shared_textrel && bfd_link_pic (info)) |
1952c5cd | 3240 | || info->error_textrel) |
695344c0 | 3241 | /* xgettext:c-format */ |
1952c5cd | 3242 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'\n"), |
b70321a2 | 3243 | p->sec->owner, p->sec); |
b70321a2 | 3244 | } |
ec338859 | 3245 | } |
0c715baa AM |
3246 | } |
3247 | } | |
3248 | ||
3249 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
3250 | if (!local_got) |
3251 | continue; | |
6725bdbf | 3252 | |
0ffa91dd | 3253 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
3254 | locsymcount = symtab_hdr->sh_info; |
3255 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 3256 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 3257 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
3258 | s = htab->elf.sgot; |
3259 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
3260 | for (; local_got < end_local_got; |
3261 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 3262 | { |
67a4f2b7 | 3263 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 3264 | if (*local_got > 0) |
6725bdbf | 3265 | { |
67a4f2b7 AO |
3266 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
3267 | { | |
6de2ae4a | 3268 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 3269 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 3270 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
3271 | *local_got = (bfd_vma) -2; |
3272 | } | |
3273 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
3274 | || GOT_TLS_GD_P (*local_tls_type)) | |
3275 | { | |
3276 | *local_got = s->size; | |
3277 | s->size += 4; | |
3278 | if (GOT_TLS_GD_P (*local_tls_type) | |
3279 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
3280 | s->size += 4; | |
3281 | } | |
0e1862bb | 3282 | if (bfd_link_pic (info) |
67a4f2b7 | 3283 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
3284 | || (*local_tls_type & GOT_TLS_IE)) |
3285 | { | |
3286 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 3287 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3288 | else if (GOT_TLS_GD_P (*local_tls_type) |
3289 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 3290 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 3291 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 3292 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 3293 | } |
6725bdbf | 3294 | } |
161d71a6 L |
3295 | else |
3296 | *local_got = (bfd_vma) -1; | |
6725bdbf | 3297 | } |
252b5132 | 3298 | } |
6725bdbf | 3299 | |
13ae64f3 JJ |
3300 | if (htab->tls_ldm_got.refcount > 0) |
3301 | { | |
3302 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
3303 | relocs. */ | |
6de2ae4a L |
3304 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
3305 | htab->elf.sgot->size += 8; | |
3306 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3307 | } |
3308 | else | |
3309 | htab->tls_ldm_got.offset = -1; | |
3310 | ||
0c715baa AM |
3311 | /* Allocate global sym .plt and .got entries, and space for global |
3312 | sym dynamic relocs. */ | |
eb4ff4d6 | 3313 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 3314 | |
c25bc9fc L |
3315 | /* Allocate .plt and .got entries, and space for local symbols. */ |
3316 | htab_traverse (htab->loc_hash_table, | |
3317 | elf_i386_allocate_local_dynrelocs, | |
3318 | info); | |
3319 | ||
67a4f2b7 AO |
3320 | /* For every jump slot reserved in the sgotplt, reloc_count is |
3321 | incremented. However, when we reserve space for TLS descriptors, | |
3322 | it's not incremented, so in order to compute the space reserved | |
3323 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 3324 | slot size. |
caa0075c | 3325 | |
e1f98742 L |
3326 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
3327 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 3328 | if (htab->elf.srelplt) |
e1f98742 L |
3329 | { |
3330 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
3331 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
3332 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
3333 | } | |
3334 | else if (htab->elf.irelplt) | |
3335 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
3336 | ||
67a4f2b7 | 3337 | |
a7b16ceb L |
3338 | if (htab->elf.sgotplt) |
3339 | { | |
3340 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 3341 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
3342 | if ((htab->elf.hgot == NULL |
3343 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
3344 | && (htab->elf.sgotplt->size |
3345 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
3346 | && (htab->elf.splt == NULL |
3347 | || htab->elf.splt->size == 0) | |
3348 | && (htab->elf.sgot == NULL | |
3349 | || htab->elf.sgot->size == 0) | |
3350 | && (htab->elf.iplt == NULL | |
3351 | || htab->elf.iplt->size == 0) | |
3352 | && (htab->elf.igotplt == NULL | |
3353 | || htab->elf.igotplt->size == 0)) | |
3354 | htab->elf.sgotplt->size = 0; | |
3355 | } | |
3356 | ||
fff53dae L |
3357 | if (_bfd_elf_eh_frame_present (info)) |
3358 | { | |
3359 | if (htab->plt_eh_frame != NULL | |
3360 | && htab->elf.splt != NULL | |
3361 | && htab->elf.splt->size != 0 | |
3362 | && !bfd_is_abs_section (htab->elf.splt->output_section)) | |
f604c2a2 | 3363 | htab->plt_eh_frame->size = htab->plt.eh_frame_plt_size; |
fff53dae L |
3364 | |
3365 | if (htab->plt_got_eh_frame != NULL | |
3366 | && htab->plt_got != NULL | |
3367 | && htab->plt_got->size != 0 | |
3368 | && !bfd_is_abs_section (htab->plt_got->output_section)) | |
3369 | htab->plt_got_eh_frame->size | |
f604c2a2 | 3370 | = htab->non_lazy_plt->eh_frame_plt_size; |
fff53dae | 3371 | } |
9a2a56cc | 3372 | |
5a15f56f AM |
3373 | /* We now have determined the sizes of the various dynamic sections. |
3374 | Allocate memory for them. */ | |
b34976b6 | 3375 | relocs = FALSE; |
252b5132 RH |
3376 | for (s = dynobj->sections; s != NULL; s = s->next) |
3377 | { | |
eac338cf PB |
3378 | bfd_boolean strip_section = TRUE; |
3379 | ||
252b5132 RH |
3380 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
3381 | continue; | |
3382 | ||
6de2ae4a | 3383 | if (s == htab->elf.splt |
9a2a56cc | 3384 | || s == htab->elf.sgot) |
252b5132 | 3385 | { |
6725bdbf AM |
3386 | /* Strip this section if we don't need it; see the |
3387 | comment below. */ | |
eac338cf PB |
3388 | /* We'd like to strip these sections if they aren't needed, but if |
3389 | we've exported dynamic symbols from them we must leave them. | |
3390 | It's too late to tell BFD to get rid of the symbols. */ | |
3391 | ||
7325306f | 3392 | if (htab->elf.hplt != NULL) |
eac338cf | 3393 | strip_section = FALSE; |
252b5132 | 3394 | } |
9a2a56cc AM |
3395 | else if (s == htab->elf.sgotplt |
3396 | || s == htab->elf.iplt | |
3397 | || s == htab->elf.igotplt | |
dd7e64d4 | 3398 | || s == htab->plt_got |
9a2a56cc | 3399 | || s == htab->plt_eh_frame |
fff53dae | 3400 | || s == htab->plt_got_eh_frame |
5474d94f AM |
3401 | || s == htab->elf.sdynbss |
3402 | || s == htab->elf.sdynrelro) | |
9a2a56cc AM |
3403 | { |
3404 | /* Strip these too. */ | |
3405 | } | |
0112cd26 | 3406 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 3407 | { |
6de2ae4a L |
3408 | if (s->size != 0 |
3409 | && s != htab->elf.srelplt | |
3410 | && s != htab->srelplt2) | |
b34976b6 | 3411 | relocs = TRUE; |
252b5132 | 3412 | |
0ac8d2ca AM |
3413 | /* We use the reloc_count field as a counter if we need |
3414 | to copy relocs into the output file. */ | |
5ae0bfb6 | 3415 | s->reloc_count = 0; |
252b5132 | 3416 | } |
6725bdbf | 3417 | else |
252b5132 RH |
3418 | { |
3419 | /* It's not one of our sections, so don't allocate space. */ | |
3420 | continue; | |
3421 | } | |
3422 | ||
c456f082 | 3423 | if (s->size == 0) |
252b5132 | 3424 | { |
0ac8d2ca AM |
3425 | /* If we don't need this section, strip it from the |
3426 | output file. This is mostly to handle .rel.bss and | |
3427 | .rel.plt. We must create both sections in | |
3428 | create_dynamic_sections, because they must be created | |
3429 | before the linker maps input sections to output | |
3430 | sections. The linker does that before | |
3431 | adjust_dynamic_symbol is called, and it is that | |
3432 | function which decides whether anything needs to go | |
3433 | into these sections. */ | |
c456f082 AM |
3434 | if (strip_section) |
3435 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
3436 | continue; |
3437 | } | |
3438 | ||
c456f082 AM |
3439 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
3440 | continue; | |
3441 | ||
f69da49f AM |
3442 | /* Allocate memory for the section contents. We use bfd_zalloc |
3443 | here in case unused entries are not reclaimed before the | |
3444 | section's contents are written out. This should not happen, | |
3445 | but this way if it does, we get a R_386_NONE reloc instead | |
3446 | of garbage. */ | |
a50b1753 | 3447 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 3448 | if (s->contents == NULL) |
b34976b6 | 3449 | return FALSE; |
252b5132 RH |
3450 | } |
3451 | ||
e41b3a13 | 3452 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
3453 | && htab->plt_eh_frame->contents != NULL) |
3454 | { | |
f129e49f | 3455 | memcpy (htab->plt_eh_frame->contents, |
f604c2a2 | 3456 | htab->plt.eh_frame_plt, |
f129e49f | 3457 | htab->plt_eh_frame->size); |
9a2a56cc AM |
3458 | bfd_put_32 (dynobj, htab->elf.splt->size, |
3459 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
3460 | } | |
e41b3a13 | 3461 | |
fff53dae L |
3462 | if (htab->plt_got_eh_frame != NULL |
3463 | && htab->plt_got_eh_frame->contents != NULL) | |
3464 | { | |
3465 | memcpy (htab->plt_got_eh_frame->contents, | |
f604c2a2 | 3466 | htab->non_lazy_plt->eh_frame_plt, |
fff53dae L |
3467 | htab->plt_got_eh_frame->size); |
3468 | bfd_put_32 (dynobj, htab->plt_got->size, | |
3469 | (htab->plt_got_eh_frame->contents | |
3470 | + PLT_FDE_LEN_OFFSET)); | |
3471 | } | |
3472 | ||
ebe50bae | 3473 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
3474 | { |
3475 | /* Add some entries to the .dynamic section. We fill in the | |
3476 | values later, in elf_i386_finish_dynamic_sections, but we | |
3477 | must add the entries now so that we get the correct size for | |
3478 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3479 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3480 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3481 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 3482 | |
0e1862bb | 3483 | if (bfd_link_executable (info)) |
252b5132 | 3484 | { |
dc810e39 | 3485 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3486 | return FALSE; |
252b5132 RH |
3487 | } |
3488 | ||
6de2ae4a | 3489 | if (htab->elf.splt->size != 0) |
252b5132 | 3490 | { |
7c1e8d3e L |
3491 | /* DT_PLTGOT is used by prelink even if there is no PLT |
3492 | relocation. */ | |
3493 | if (!add_dynamic_entry (DT_PLTGOT, 0)) | |
b34976b6 | 3494 | return FALSE; |
97d343d4 | 3495 | } |
7c1e8d3e | 3496 | |
97d343d4 L |
3497 | if (htab->elf.srelplt->size != 0) |
3498 | { | |
3499 | if (!add_dynamic_entry (DT_PLTRELSZ, 0) | |
3500 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3501 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
3502 | return FALSE; | |
252b5132 RH |
3503 | } |
3504 | ||
3505 | if (relocs) | |
3506 | { | |
dc810e39 AM |
3507 | if (!add_dynamic_entry (DT_REL, 0) |
3508 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3509 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3510 | return FALSE; |
252b5132 | 3511 | |
0c715baa AM |
3512 | /* If any dynamic relocs apply to a read-only section, |
3513 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3514 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3515 | elf_link_hash_traverse (&htab->elf, |
3516 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3517 | |
3518 | if ((info->flags & DF_TEXTREL) != 0) | |
3519 | { | |
2df3368d | 3520 | if (htab->readonly_dynrelocs_against_ifunc) |
8efa2874 L |
3521 | { |
3522 | info->callbacks->einfo | |
3523 | (_("%P%X: read-only segment has dynamic IFUNC relocations; recompile with -fPIC\n")); | |
3524 | bfd_set_error (bfd_error_bad_value); | |
3525 | return FALSE; | |
3526 | } | |
3527 | ||
0c715baa | 3528 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3529 | return FALSE; |
0c715baa | 3530 | } |
252b5132 | 3531 | } |
f604c2a2 | 3532 | if (get_elf_i386_backend_data (output_bfd)->os == is_vxworks |
7a2b07ff NS |
3533 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3534 | return FALSE; | |
252b5132 | 3535 | } |
dc810e39 | 3536 | #undef add_dynamic_entry |
252b5132 | 3537 | |
b34976b6 | 3538 | return TRUE; |
252b5132 RH |
3539 | } |
3540 | ||
67a4f2b7 AO |
3541 | static bfd_boolean |
3542 | elf_i386_always_size_sections (bfd *output_bfd, | |
3543 | struct bfd_link_info *info) | |
3544 | { | |
3545 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3546 | ||
3547 | if (tls_sec) | |
3548 | { | |
3549 | struct elf_link_hash_entry *tlsbase; | |
3550 | ||
3551 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3552 | "_TLS_MODULE_BASE_", | |
3553 | FALSE, FALSE, FALSE); | |
3554 | ||
3555 | if (tlsbase && tlsbase->type == STT_TLS) | |
3556 | { | |
4dfe6ac6 | 3557 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3558 | struct bfd_link_hash_entry *bh = NULL; |
3559 | const struct elf_backend_data *bed | |
3560 | = get_elf_backend_data (output_bfd); | |
3561 | ||
4dfe6ac6 NC |
3562 | htab = elf_i386_hash_table (info); |
3563 | if (htab == NULL) | |
3564 | return FALSE; | |
3565 | ||
67a4f2b7 AO |
3566 | if (!(_bfd_generic_link_add_one_symbol |
3567 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3568 | tls_sec, 0, NULL, FALSE, | |
3569 | bed->collect, &bh))) | |
3570 | return FALSE; | |
9f03412a | 3571 | |
4dfe6ac6 | 3572 | htab->tls_module_base = bh; |
9f03412a | 3573 | |
67a4f2b7 AO |
3574 | tlsbase = (struct elf_link_hash_entry *)bh; |
3575 | tlsbase->def_regular = 1; | |
3576 | tlsbase->other = STV_HIDDEN; | |
576fa883 | 3577 | tlsbase->root.linker_def = 1; |
67a4f2b7 AO |
3578 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); |
3579 | } | |
3580 | } | |
3581 | ||
3582 | return TRUE; | |
3583 | } | |
3584 | ||
38701953 AM |
3585 | /* Set the correct type for an x86 ELF section. We do this by the |
3586 | section name, which is a hack, but ought to work. */ | |
3587 | ||
b34976b6 | 3588 | static bfd_boolean |
55fd94b0 AM |
3589 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3590 | Elf_Internal_Shdr *hdr, | |
3591 | asection *sec) | |
38701953 | 3592 | { |
91d6fa6a | 3593 | const char *name; |
38701953 AM |
3594 | |
3595 | name = bfd_get_section_name (abfd, sec); | |
3596 | ||
3597 | /* This is an ugly, but unfortunately necessary hack that is | |
3598 | needed when producing EFI binaries on x86. It tells | |
3599 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3600 | containing ELF relocation info. We need this hack in order to | |
3601 | be able to generate ELF binaries that can be translated into | |
3602 | EFI applications (which are essentially COFF objects). Those | |
3603 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3604 | which would normally cause BFD to segfault because it would | |
3605 | attempt to interpret this section as containing relocation | |
3606 | entries for section "oc". With this hack enabled, ".reloc" | |
3607 | will be treated as a normal data section, which will avoid the | |
3608 | segfault. However, you won't be able to create an ELFNN binary | |
3609 | with a section named "oc" that needs relocations, but that's | |
3610 | the kind of ugly side-effects you get when detecting section | |
3611 | types based on their names... In practice, this limitation is | |
3612 | unlikely to bite. */ | |
3613 | if (strcmp (name, ".reloc") == 0) | |
3614 | hdr->sh_type = SHT_PROGBITS; | |
3615 | ||
b34976b6 | 3616 | return TRUE; |
38701953 AM |
3617 | } |
3618 | ||
9f03412a AO |
3619 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3620 | executables. Rather than setting it to the beginning of the TLS | |
3621 | section, we have to set it to the end. This function may be called | |
3622 | multiple times, it is idempotent. */ | |
3623 | ||
3624 | static void | |
eb4ff4d6 | 3625 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3626 | { |
4dfe6ac6 | 3627 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3628 | struct bfd_link_hash_entry *base; |
3629 | ||
0e1862bb | 3630 | if (!bfd_link_executable (info)) |
9f03412a AO |
3631 | return; |
3632 | ||
4dfe6ac6 NC |
3633 | htab = elf_i386_hash_table (info); |
3634 | if (htab == NULL) | |
3635 | return; | |
9f03412a | 3636 | |
4dfe6ac6 NC |
3637 | base = htab->tls_module_base; |
3638 | if (base == NULL) | |
9f03412a AO |
3639 | return; |
3640 | ||
4dfe6ac6 | 3641 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3642 | } |
3643 | ||
13ae64f3 JJ |
3644 | /* Return the base VMA address which should be subtracted from real addresses |
3645 | when resolving @dtpoff relocation. | |
3646 | This is PT_TLS segment p_vaddr. */ | |
3647 | ||
3648 | static bfd_vma | |
eb4ff4d6 | 3649 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3650 | { |
e1918d23 AM |
3651 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3652 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3653 | return 0; |
e1918d23 | 3654 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3655 | } |
3656 | ||
3657 | /* Return the relocation value for @tpoff relocation | |
3658 | if STT_TLS virtual address is ADDRESS. */ | |
3659 | ||
3660 | static bfd_vma | |
eb4ff4d6 | 3661 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3662 | { |
e1918d23 | 3663 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3664 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3665 | bfd_vma static_tls_size; | |
13ae64f3 | 3666 | |
e1918d23 AM |
3667 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3668 | if (htab->tls_sec == NULL) | |
6a30718d | 3669 | return 0; |
7dc98aea RO |
3670 | |
3671 | /* Consider special static TLS alignment requirements. */ | |
3672 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3673 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3674 | } |
3675 | ||
252b5132 RH |
3676 | /* Relocate an i386 ELF section. */ |
3677 | ||
b34976b6 | 3678 | static bfd_boolean |
55fd94b0 AM |
3679 | elf_i386_relocate_section (bfd *output_bfd, |
3680 | struct bfd_link_info *info, | |
3681 | bfd *input_bfd, | |
3682 | asection *input_section, | |
3683 | bfd_byte *contents, | |
3684 | Elf_Internal_Rela *relocs, | |
3685 | Elf_Internal_Sym *local_syms, | |
3686 | asection **local_sections) | |
252b5132 | 3687 | { |
6725bdbf | 3688 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3689 | Elf_Internal_Shdr *symtab_hdr; |
3690 | struct elf_link_hash_entry **sym_hashes; | |
3691 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3692 | bfd_vma *local_tlsdesc_gotents; |
252b5132 | 3693 | Elf_Internal_Rela *rel; |
60f2e42e | 3694 | Elf_Internal_Rela *wrel; |
252b5132 | 3695 | Elf_Internal_Rela *relend; |
3348747a | 3696 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3697 | unsigned plt_entry_size; |
252b5132 | 3698 | |
0ffa91dd | 3699 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3700 | |
c337a162 L |
3701 | /* Skip if check_relocs failed. */ |
3702 | if (input_section->check_relocs_failed) | |
3703 | return FALSE; | |
3704 | ||
6725bdbf | 3705 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3706 | if (htab == NULL) |
3707 | return FALSE; | |
0ffa91dd | 3708 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3709 | sym_hashes = elf_sym_hashes (input_bfd); |
3710 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3711 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3712 | /* We have to handle relocations in vxworks .tls_vars sections |
3713 | specially, because the dynamic loader is 'weird'. */ | |
f604c2a2 L |
3714 | is_vxworks_tls = ((get_elf_i386_backend_data (output_bfd)->os |
3715 | == is_vxworks) | |
0e1862bb | 3716 | && bfd_link_pic (info) |
3348747a NS |
3717 | && !strcmp (input_section->output_section->name, |
3718 | ".tls_vars")); | |
252b5132 | 3719 | |
eb4ff4d6 | 3720 | elf_i386_set_tls_module_base (info); |
9f03412a | 3721 | |
f604c2a2 | 3722 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 3723 | |
60f2e42e | 3724 | rel = wrel = relocs; |
252b5132 | 3725 | relend = relocs + input_section->reloc_count; |
60f2e42e | 3726 | for (; rel < relend; wrel++, rel++) |
252b5132 | 3727 | { |
13ae64f3 | 3728 | unsigned int r_type; |
252b5132 RH |
3729 | reloc_howto_type *howto; |
3730 | unsigned long r_symndx; | |
3731 | struct elf_link_hash_entry *h; | |
dd7e64d4 | 3732 | struct elf_i386_link_hash_entry *eh; |
252b5132 RH |
3733 | Elf_Internal_Sym *sym; |
3734 | asection *sec; | |
dd7e64d4 | 3735 | bfd_vma off, offplt, plt_offset; |
252b5132 | 3736 | bfd_vma relocation; |
b34976b6 | 3737 | bfd_boolean unresolved_reloc; |
252b5132 | 3738 | bfd_reloc_status_type r; |
1b452ec6 | 3739 | unsigned int indx; |
13ae64f3 | 3740 | int tls_type; |
1788fc08 | 3741 | bfd_vma st_size; |
dd7e64d4 | 3742 | asection *resolved_plt; |
aec6b87e | 3743 | bfd_boolean resolved_to_zero; |
e133d005 | 3744 | bfd_boolean relative_reloc; |
252b5132 RH |
3745 | |
3746 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3747 | if (r_type == R_386_GNU_VTINHERIT |
3748 | || r_type == R_386_GNU_VTENTRY) | |
18954b29 L |
3749 | { |
3750 | if (wrel != rel) | |
3751 | *wrel = *rel; | |
3752 | continue; | |
3753 | } | |
dc47f327 | 3754 | |
55fd94b0 | 3755 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3756 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3757 | >= R_386_ext - R_386_standard) | |
3758 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
c74be520 | 3759 | >= R_386_ext2 - R_386_ext)) |
252b5132 | 3760 | { |
4eca0228 | 3761 | _bfd_error_handler |
695344c0 | 3762 | /* xgettext:c-format */ |
d003868e | 3763 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
c08bb8dd | 3764 | input_bfd, r_type, input_section); |
252b5132 | 3765 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3766 | return FALSE; |
252b5132 | 3767 | } |
1b452ec6 | 3768 | howto = elf_howto_table + indx; |
252b5132 RH |
3769 | |
3770 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3771 | h = NULL; |
3772 | sym = NULL; | |
3773 | sec = NULL; | |
b34976b6 | 3774 | unresolved_reloc = FALSE; |
252b5132 RH |
3775 | if (r_symndx < symtab_hdr->sh_info) |
3776 | { | |
3777 | sym = local_syms + r_symndx; | |
3778 | sec = local_sections[r_symndx]; | |
3779 | relocation = (sec->output_section->vma | |
3780 | + sec->output_offset | |
3781 | + sym->st_value); | |
1788fc08 | 3782 | st_size = sym->st_size; |
ab96bf03 AM |
3783 | |
3784 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3785 | && ((sec->flags & SEC_MERGE) != 0 | |
0e1862bb | 3786 | || (bfd_link_relocatable (info) |
ab96bf03 | 3787 | && sec->output_offset != 0))) |
f8df10f4 | 3788 | { |
f8df10f4 | 3789 | bfd_vma addend; |
4a335f3d | 3790 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3791 | |
4a335f3d | 3792 | switch (howto->size) |
f8df10f4 | 3793 | { |
4a335f3d AM |
3794 | case 0: |
3795 | addend = bfd_get_8 (input_bfd, where); | |
3796 | if (howto->pc_relative) | |
3797 | { | |
3798 | addend = (addend ^ 0x80) - 0x80; | |
3799 | addend += 1; | |
3800 | } | |
3801 | break; | |
3802 | case 1: | |
3803 | addend = bfd_get_16 (input_bfd, where); | |
3804 | if (howto->pc_relative) | |
3805 | { | |
3806 | addend = (addend ^ 0x8000) - 0x8000; | |
3807 | addend += 2; | |
3808 | } | |
3809 | break; | |
3810 | case 2: | |
3811 | addend = bfd_get_32 (input_bfd, where); | |
3812 | if (howto->pc_relative) | |
3813 | { | |
3814 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3815 | addend += 4; | |
3816 | } | |
3817 | break; | |
3818 | default: | |
3819 | abort (); | |
f8df10f4 JJ |
3820 | } |
3821 | ||
0e1862bb | 3822 | if (bfd_link_relocatable (info)) |
ab96bf03 AM |
3823 | addend += sec->output_offset; |
3824 | else | |
3825 | { | |
3826 | asection *msec = sec; | |
3827 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3828 | addend); | |
3829 | addend -= relocation; | |
3830 | addend += msec->output_section->vma + msec->output_offset; | |
3831 | } | |
4a335f3d AM |
3832 | |
3833 | switch (howto->size) | |
3834 | { | |
3835 | case 0: | |
16a10388 | 3836 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3837 | if (howto->pc_relative) |
3838 | addend -= 1; | |
3839 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3840 | break; |
3841 | case 1: | |
3842 | if (howto->pc_relative) | |
3843 | addend -= 2; | |
3844 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3845 | break; |
3846 | case 2: | |
3847 | if (howto->pc_relative) | |
3848 | addend -= 4; | |
3849 | bfd_put_32 (input_bfd, addend, where); | |
3850 | break; | |
3851 | } | |
f8df10f4 | 3852 | } |
0e1862bb | 3853 | else if (!bfd_link_relocatable (info) |
1f85278f | 3854 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc L |
3855 | { |
3856 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3857 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3858 | FALSE); | |
c25bc9fc L |
3859 | if (h == NULL) |
3860 | abort (); | |
3861 | ||
23209a78 | 3862 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3863 | h->root.u.def.value = sym->st_value; |
3864 | h->root.u.def.section = sec; | |
3865 | } | |
252b5132 RH |
3866 | } |
3867 | else | |
3868 | { | |
3d540e93 | 3869 | bfd_boolean warned ATTRIBUTE_UNUSED; |
62d887d4 | 3870 | bfd_boolean ignored ATTRIBUTE_UNUSED; |
ffb2e45b | 3871 | |
b2a8e766 AM |
3872 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3873 | r_symndx, symtab_hdr, sym_hashes, | |
3874 | h, sec, relocation, | |
62d887d4 | 3875 | unresolved_reloc, warned, ignored); |
1788fc08 | 3876 | st_size = h->size; |
252b5132 RH |
3877 | } |
3878 | ||
dbaa2011 | 3879 | if (sec != NULL && discarded_section (sec)) |
60f2e42e L |
3880 | { |
3881 | _bfd_clear_contents (howto, input_bfd, input_section, | |
3882 | contents + rel->r_offset); | |
3883 | wrel->r_offset = rel->r_offset; | |
3884 | wrel->r_info = 0; | |
3885 | wrel->r_addend = 0; | |
3886 | ||
3887 | /* For ld -r, remove relocations in debug sections against | |
3888 | sections defined in discarded sections. Not done for | |
3889 | eh_frame editing code expects to be present. */ | |
3890 | if (bfd_link_relocatable (info) | |
3891 | && (input_section->flags & SEC_DEBUGGING)) | |
3892 | wrel--; | |
3893 | ||
3894 | continue; | |
3895 | } | |
9635fe29 | 3896 | |
0e1862bb | 3897 | if (bfd_link_relocatable (info)) |
2d5da473 L |
3898 | { |
3899 | if (wrel != rel) | |
3900 | *wrel = *rel; | |
3901 | continue; | |
3902 | } | |
ab96bf03 | 3903 | |
cbe950e9 L |
3904 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3905 | it here if it is defined in a non-shared object. */ | |
3906 | if (h != NULL | |
3907 | && h->type == STT_GNU_IFUNC | |
3908 | && h->def_regular) | |
3909 | { | |
3910 | asection *plt, *gotplt, *base_got; | |
3911 | bfd_vma plt_index; | |
4c544807 | 3912 | const char *name; |
cbe950e9 | 3913 | |
97dc35c8 L |
3914 | if ((input_section->flags & SEC_ALLOC) == 0) |
3915 | { | |
3916 | /* Dynamic relocs are not propagated for SEC_DEBUGGING | |
3917 | sections because such sections are not SEC_ALLOC and | |
3918 | thus ld.so will not process them. */ | |
3919 | if ((input_section->flags & SEC_DEBUGGING) != 0) | |
0eace210 | 3920 | continue; |
97dc35c8 L |
3921 | abort (); |
3922 | } | |
cbe950e9 L |
3923 | |
3924 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3925 | if (htab->elf.splt != NULL) |
cbe950e9 | 3926 | { |
6de2ae4a L |
3927 | plt = htab->elf.splt; |
3928 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3929 | } |
3930 | else | |
3931 | { | |
6de2ae4a L |
3932 | plt = htab->elf.iplt; |
3933 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3934 | } |
3935 | ||
cbe950e9 L |
3936 | switch (r_type) |
3937 | { | |
3938 | default: | |
233cc9c1 | 3939 | break; |
cbe950e9 L |
3940 | |
3941 | case R_386_GOT32: | |
02a86693 | 3942 | case R_386_GOT32X: |
6de2ae4a | 3943 | base_got = htab->elf.sgot; |
cbe950e9 L |
3944 | off = h->got.offset; |
3945 | ||
7afd84dc | 3946 | if (base_got == NULL) |
cbe950e9 L |
3947 | abort (); |
3948 | ||
7afd84dc | 3949 | if (off == (bfd_vma) -1) |
cbe950e9 | 3950 | { |
7afd84dc L |
3951 | /* We can't use h->got.offset here to save state, or |
3952 | even just remember the offset, as finish_dynamic_symbol | |
3953 | would use that as offset into .got. */ | |
6bbec505 | 3954 | |
233cc9c1 L |
3955 | if (h->plt.offset == (bfd_vma) -1) |
3956 | abort (); | |
3957 | ||
6de2ae4a | 3958 | if (htab->elf.splt != NULL) |
7afd84dc | 3959 | { |
f604c2a2 L |
3960 | plt_index = (h->plt.offset / plt_entry_size |
3961 | - htab->plt.has_plt0); | |
7afd84dc | 3962 | off = (plt_index + 3) * 4; |
6de2ae4a | 3963 | base_got = htab->elf.sgotplt; |
7afd84dc | 3964 | } |
cbe950e9 L |
3965 | else |
3966 | { | |
25e762b9 | 3967 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3968 | off = plt_index * 4; |
6de2ae4a | 3969 | base_got = htab->elf.igotplt; |
7afd84dc L |
3970 | } |
3971 | ||
3972 | if (h->dynindx == -1 | |
3973 | || h->forced_local | |
3974 | || info->symbolic) | |
3975 | { | |
3976 | /* This references the local defitionion. We must | |
3977 | initialize this entry in the global offset table. | |
3978 | Since the offset must always be a multiple of 8, | |
3979 | we use the least significant bit to record | |
3980 | whether we have initialized it already. | |
3981 | ||
3982 | When doing a dynamic link, we create a .rela.got | |
3983 | relocation entry to initialize the value. This | |
3984 | is done in the finish_dynamic_symbol routine. */ | |
3985 | if ((off & 1) != 0) | |
3986 | off &= ~1; | |
3987 | else | |
3988 | { | |
3989 | bfd_put_32 (output_bfd, relocation, | |
3990 | base_got->contents + off); | |
3991 | h->got.offset |= 1; | |
3992 | } | |
cbe950e9 | 3993 | } |
cbe950e9 | 3994 | |
7afd84dc | 3995 | relocation = off; |
7afd84dc L |
3996 | } |
3997 | else | |
ca8c86ef L |
3998 | relocation = (base_got->output_section->vma |
3999 | + base_got->output_offset + off | |
4000 | - gotplt->output_section->vma | |
4001 | - gotplt->output_offset); | |
4002 | ||
2a568401 L |
4003 | if (rel->r_offset > 1 |
4004 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
4005 | && *(contents + rel->r_offset - 2) != 0x8d) | |
712ec279 L |
4006 | { |
4007 | if (bfd_link_pic (info)) | |
4008 | goto disallow_got32; | |
4009 | ||
4010 | /* Add the GOT base if there is no base register. */ | |
4011 | relocation += (gotplt->output_section->vma | |
4012 | + gotplt->output_offset); | |
4013 | } | |
4014 | else if (htab->elf.splt == NULL) | |
4015 | { | |
4016 | /* Adjust for static executables. */ | |
4017 | relocation += gotplt->output_offset; | |
4018 | } | |
0018b0a3 | 4019 | |
cbe950e9 | 4020 | goto do_relocation; |
233cc9c1 L |
4021 | } |
4022 | ||
4023 | if (h->plt.offset == (bfd_vma) -1) | |
4024 | { | |
4025 | /* Handle static pointers of STT_GNU_IFUNC symbols. */ | |
4026 | if (r_type == R_386_32 | |
4027 | && (input_section->flags & SEC_CODE) == 0) | |
4028 | goto do_ifunc_pointer; | |
4029 | goto bad_ifunc_reloc; | |
4030 | } | |
4031 | ||
4032 | relocation = (plt->output_section->vma | |
4033 | + plt->output_offset + h->plt.offset); | |
4034 | ||
4035 | switch (r_type) | |
4036 | { | |
4037 | default: | |
4038 | bad_ifunc_reloc: | |
4039 | if (h->root.root.string) | |
4040 | name = h->root.root.string; | |
4041 | else | |
4042 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
4043 | NULL); | |
4eca0228 | 4044 | _bfd_error_handler |
695344c0 | 4045 | /* xgettext:c-format */ |
233cc9c1 L |
4046 | (_("%B: relocation %s against STT_GNU_IFUNC " |
4047 | "symbol `%s' isn't supported"), input_bfd, | |
4048 | howto->name, name); | |
4049 | bfd_set_error (bfd_error_bad_value); | |
4050 | return FALSE; | |
4051 | ||
4052 | case R_386_32: | |
4053 | /* Generate dynamic relcoation only when there is a | |
4054 | non-GOT reference in a shared object. */ | |
4055 | if ((bfd_link_pic (info) && h->non_got_ref) | |
4056 | || h->plt.offset == (bfd_vma) -1) | |
4057 | { | |
4058 | Elf_Internal_Rela outrel; | |
4059 | asection *sreloc; | |
4060 | bfd_vma offset; | |
4061 | ||
4062 | do_ifunc_pointer: | |
4063 | /* Need a dynamic relocation to get the real function | |
4064 | adddress. */ | |
4065 | offset = _bfd_elf_section_offset (output_bfd, | |
4066 | info, | |
4067 | input_section, | |
4068 | rel->r_offset); | |
4069 | if (offset == (bfd_vma) -1 | |
4070 | || offset == (bfd_vma) -2) | |
4071 | abort (); | |
4072 | ||
4073 | outrel.r_offset = (input_section->output_section->vma | |
4074 | + input_section->output_offset | |
4075 | + offset); | |
4076 | ||
4077 | if (h->dynindx == -1 | |
4078 | || h->forced_local | |
4079 | || bfd_link_executable (info)) | |
4080 | { | |
6322e5c5 L |
4081 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
4082 | h->root.root.string, | |
4083 | h->root.u.def.section->owner); | |
4084 | ||
233cc9c1 L |
4085 | /* This symbol is resolved locally. */ |
4086 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
4087 | bfd_put_32 (output_bfd, | |
4088 | (h->root.u.def.value | |
4089 | + h->root.u.def.section->output_section->vma | |
4090 | + h->root.u.def.section->output_offset), | |
4091 | contents + offset); | |
4092 | } | |
4093 | else | |
4094 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
4095 | ||
4096 | /* Dynamic relocations are stored in | |
4097 | 1. .rel.ifunc section in PIC object. | |
4098 | 2. .rel.got section in dynamic executable. | |
4099 | 3. .rel.iplt section in static executable. */ | |
4100 | if (bfd_link_pic (info)) | |
4101 | sreloc = htab->elf.irelifunc; | |
4102 | else if (htab->elf.splt != NULL) | |
4103 | sreloc = htab->elf.srelgot; | |
4104 | else | |
4105 | sreloc = htab->elf.irelplt; | |
4106 | elf_append_rel (output_bfd, sreloc, &outrel); | |
4107 | ||
4108 | /* If this reloc is against an external symbol, we | |
4109 | do not want to fiddle with the addend. Otherwise, | |
4110 | we need to include the symbol value so that it | |
4111 | becomes an addend for the dynamic reloc. For an | |
4112 | internal symbol, we have updated addend. */ | |
4113 | continue; | |
4114 | } | |
4115 | /* FALLTHROUGH */ | |
4116 | case R_386_PC32: | |
4117 | case R_386_PLT32: | |
4118 | goto do_relocation; | |
cbe950e9 L |
4119 | |
4120 | case R_386_GOTOFF: | |
4121 | relocation -= (gotplt->output_section->vma | |
4122 | + gotplt->output_offset); | |
4123 | goto do_relocation; | |
4124 | } | |
4125 | } | |
4126 | ||
04ebc307 | 4127 | eh = (struct elf_i386_link_hash_entry *) h; |
aec6b87e | 4128 | resolved_to_zero = (eh != NULL |
e62b9723 L |
4129 | && UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
4130 | eh->has_got_reloc, | |
4131 | eh)); | |
aec6b87e | 4132 | |
252b5132 RH |
4133 | switch (r_type) |
4134 | { | |
02a86693 L |
4135 | case R_386_GOT32X: |
4136 | /* Avoid optimizing _DYNAMIC since ld.so may use its | |
4137 | link-time address. */ | |
4138 | if (h == htab->elf.hdynamic) | |
4139 | goto r_386_got32; | |
4140 | ||
4141 | if (bfd_link_pic (info)) | |
4142 | { | |
4143 | /* It is OK to convert mov to lea and convert indirect | |
4144 | branch to direct branch. It is OK to convert adc, | |
4145 | add, and, cmp, or, sbb, sub, test, xor only when PIC | |
4146 | is false. */ | |
02e2aef8 L |
4147 | unsigned int opcode, addend; |
4148 | addend = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
4149 | if (addend != 0) | |
4150 | goto r_386_got32; | |
4151 | opcode = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
02a86693 L |
4152 | if (opcode != 0x8b && opcode != 0xff) |
4153 | goto r_386_got32; | |
4154 | } | |
4155 | ||
4156 | /* Resolve "mov GOT[(%reg)], %reg", | |
4157 | "call/jmp *GOT[(%reg)]", "test %reg, foo@GOT[(%reg)]" | |
4158 | and "binop foo@GOT[(%reg)], %reg". */ | |
4159 | if (h == NULL | |
4160 | || (h->plt.offset == (bfd_vma) -1 | |
4161 | && h->got.offset == (bfd_vma) -1) | |
4162 | || htab->elf.sgotplt == NULL) | |
4163 | abort (); | |
4164 | ||
4165 | offplt = (htab->elf.sgotplt->output_section->vma | |
4166 | + htab->elf.sgotplt->output_offset); | |
4167 | ||
4168 | /* It is relative to .got.plt section. */ | |
4169 | if (h->got.offset != (bfd_vma) -1) | |
32875eb1 L |
4170 | /* Use GOT entry. Mask off the least significant bit in |
4171 | GOT offset which may be set by R_386_GOT32 processing | |
4172 | below. */ | |
02a86693 L |
4173 | relocation = (htab->elf.sgot->output_section->vma |
4174 | + htab->elf.sgot->output_offset | |
32875eb1 | 4175 | + (h->got.offset & ~1) - offplt); |
02a86693 L |
4176 | else |
4177 | /* Use GOTPLT entry. */ | |
f604c2a2 L |
4178 | relocation = (h->plt.offset / plt_entry_size |
4179 | - htab->plt.has_plt0 + 3) * 4; | |
02a86693 L |
4180 | |
4181 | if (!bfd_link_pic (info)) | |
4182 | { | |
4183 | /* If not PIC, add the .got.plt section address for | |
a3718e9e | 4184 | baseless addressing. */ |
02a86693 | 4185 | unsigned int modrm; |
02e2aef8 | 4186 | modrm = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
02a86693 L |
4187 | if ((modrm & 0xc7) == 0x5) |
4188 | relocation += offplt; | |
4189 | } | |
4190 | ||
4191 | unresolved_reloc = FALSE; | |
4192 | break; | |
4193 | ||
252b5132 | 4194 | case R_386_GOT32: |
02a86693 | 4195 | r_386_got32: |
252b5132 RH |
4196 | /* Relocation is to the entry for this symbol in the global |
4197 | offset table. */ | |
6de2ae4a | 4198 | if (htab->elf.sgot == NULL) |
ffb2e45b | 4199 | abort (); |
252b5132 | 4200 | |
e133d005 | 4201 | relative_reloc = FALSE; |
252b5132 RH |
4202 | if (h != NULL) |
4203 | { | |
b34976b6 | 4204 | bfd_boolean dyn; |
252b5132 RH |
4205 | |
4206 | off = h->got.offset; | |
ebe50bae | 4207 | dyn = htab->elf.dynamic_sections_created; |
0e1862bb L |
4208 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, |
4209 | bfd_link_pic (info), | |
4210 | h) | |
4211 | || (bfd_link_pic (info) | |
586119b3 | 4212 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
4213 | || (ELF_ST_VISIBILITY (h->other) |
4214 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
4215 | { |
4216 | /* This is actually a static link, or it is a | |
4217 | -Bsymbolic link and the symbol is defined | |
4218 | locally, or the symbol was forced to be local | |
4219 | because of a version file. We must initialize | |
4220 | this entry in the global offset table. Since the | |
4221 | offset must always be a multiple of 4, we use the | |
4222 | least significant bit to record whether we have | |
4223 | initialized it already. | |
4224 | ||
4225 | When doing a dynamic link, we create a .rel.got | |
4226 | relocation entry to initialize the value. This | |
4227 | is done in the finish_dynamic_symbol routine. */ | |
4228 | if ((off & 1) != 0) | |
4229 | off &= ~1; | |
4230 | else | |
4231 | { | |
4232 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 4233 | htab->elf.sgot->contents + off); |
252b5132 | 4234 | h->got.offset |= 1; |
e133d005 L |
4235 | |
4236 | if (h->dynindx == -1 | |
4237 | && !h->forced_local | |
4238 | && h->root.type != bfd_link_hash_undefweak | |
0dc9a308 | 4239 | && bfd_link_pic (info)) |
e133d005 L |
4240 | { |
4241 | /* PR ld/21402: If this symbol isn't dynamic | |
0dc9a308 | 4242 | in PIC, generate R_386_RELATIVE here. */ |
e133d005 L |
4243 | eh->no_finish_dynamic_symbol = 1; |
4244 | relative_reloc = TRUE; | |
4245 | } | |
252b5132 RH |
4246 | } |
4247 | } | |
8c694914 | 4248 | else |
b34976b6 | 4249 | unresolved_reloc = FALSE; |
252b5132 RH |
4250 | } |
4251 | else | |
4252 | { | |
ffb2e45b AM |
4253 | if (local_got_offsets == NULL) |
4254 | abort (); | |
252b5132 RH |
4255 | |
4256 | off = local_got_offsets[r_symndx]; | |
4257 | ||
4258 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
4259 | the least significant bit to record whether we have |
4260 | already generated the necessary reloc. */ | |
252b5132 RH |
4261 | if ((off & 1) != 0) |
4262 | off &= ~1; | |
4263 | else | |
4264 | { | |
6725bdbf | 4265 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 4266 | htab->elf.sgot->contents + off); |
e133d005 | 4267 | local_got_offsets[r_symndx] |= 1; |
252b5132 | 4268 | |
0e1862bb | 4269 | if (bfd_link_pic (info)) |
e133d005 | 4270 | relative_reloc = TRUE; |
252b5132 | 4271 | } |
252b5132 RH |
4272 | } |
4273 | ||
e133d005 L |
4274 | if (relative_reloc) |
4275 | { | |
4276 | asection *s; | |
4277 | Elf_Internal_Rela outrel; | |
4278 | ||
4279 | s = htab->elf.srelgot; | |
4280 | if (s == NULL) | |
4281 | abort (); | |
4282 | ||
4283 | outrel.r_offset = (htab->elf.sgot->output_section->vma | |
4284 | + htab->elf.sgot->output_offset | |
4285 | + off); | |
4286 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4287 | elf_append_rel (output_bfd, s, &outrel); | |
4288 | } | |
4289 | ||
ffb2e45b AM |
4290 | if (off >= (bfd_vma) -2) |
4291 | abort (); | |
4292 | ||
74d7f0aa L |
4293 | relocation = (htab->elf.sgot->output_section->vma |
4294 | + htab->elf.sgot->output_offset + off); | |
2a568401 L |
4295 | if (rel->r_offset > 1 |
4296 | && (*(contents + rel->r_offset - 1) & 0xc7) == 0x5 | |
4297 | && *(contents + rel->r_offset - 2) != 0x8d) | |
74d7f0aa L |
4298 | { |
4299 | if (bfd_link_pic (info)) | |
4300 | { | |
4301 | /* For PIC, disallow R_386_GOT32 without a base | |
2a568401 L |
4302 | register, except for "lea foo@GOT, %reg", since |
4303 | we don't know what the GOT base is. */ | |
74d7f0aa L |
4304 | const char *name; |
4305 | ||
712ec279 | 4306 | disallow_got32: |
a5def14f | 4307 | if (h == NULL || h->root.root.string == NULL) |
74d7f0aa L |
4308 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, |
4309 | NULL); | |
4310 | else | |
4311 | name = h->root.root.string; | |
4312 | ||
4eca0228 | 4313 | _bfd_error_handler |
695344c0 | 4314 | /* xgettext:c-format */ |
63a5468a AM |
4315 | (_("%B: direct GOT relocation %s against `%s'" |
4316 | " without base register can not be used" | |
4317 | " when making a shared object"), | |
712ec279 | 4318 | input_bfd, howto->name, name); |
74d7f0aa L |
4319 | bfd_set_error (bfd_error_bad_value); |
4320 | return FALSE; | |
4321 | } | |
4322 | } | |
4323 | else | |
4324 | { | |
4325 | /* Subtract the .got.plt section address only with a base | |
4326 | register. */ | |
4327 | relocation -= (htab->elf.sgotplt->output_section->vma | |
4328 | + htab->elf.sgotplt->output_offset); | |
4329 | } | |
4330 | ||
252b5132 RH |
4331 | break; |
4332 | ||
4333 | case R_386_GOTOFF: | |
4334 | /* Relocation is relative to the start of the global offset | |
4335 | table. */ | |
4336 | ||
3d949995 L |
4337 | /* Check to make sure it isn't a protected function or data |
4338 | symbol for shared library since it may not be local when | |
4339 | used as function address or with copy relocation. We also | |
e3c0e327 | 4340 | need to make sure that a symbol is referenced locally. */ |
0e1862bb | 4341 | if (!bfd_link_executable (info) && h) |
90f487df | 4342 | { |
41bed6dd L |
4343 | if (!h->def_regular) |
4344 | { | |
4345 | const char *v; | |
4346 | ||
4347 | switch (ELF_ST_VISIBILITY (h->other)) | |
4348 | { | |
4349 | case STV_HIDDEN: | |
4350 | v = _("hidden symbol"); | |
4351 | break; | |
4352 | case STV_INTERNAL: | |
4353 | v = _("internal symbol"); | |
4354 | break; | |
4355 | case STV_PROTECTED: | |
4356 | v = _("protected symbol"); | |
4357 | break; | |
4358 | default: | |
4359 | v = _("symbol"); | |
4360 | break; | |
4361 | } | |
4362 | ||
4eca0228 | 4363 | _bfd_error_handler |
695344c0 | 4364 | /* xgettext:c-format */ |
63a5468a AM |
4365 | (_("%B: relocation R_386_GOTOFF against undefined %s" |
4366 | " `%s' can not be used when making a shared object"), | |
41bed6dd L |
4367 | input_bfd, v, h->root.root.string); |
4368 | bfd_set_error (bfd_error_bad_value); | |
4369 | return FALSE; | |
4370 | } | |
d5597ebc | 4371 | else if (!SYMBOL_REFERENCES_LOCAL (info, h) |
3d949995 L |
4372 | && (h->type == STT_FUNC |
4373 | || h->type == STT_OBJECT) | |
41bed6dd L |
4374 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) |
4375 | { | |
4eca0228 | 4376 | _bfd_error_handler |
695344c0 | 4377 | /* xgettext:c-format */ |
63a5468a AM |
4378 | (_("%B: relocation R_386_GOTOFF against protected %s" |
4379 | " `%s' can not be used when making a shared object"), | |
3d949995 L |
4380 | input_bfd, |
4381 | h->type == STT_FUNC ? "function" : "data", | |
4382 | h->root.root.string); | |
41bed6dd L |
4383 | bfd_set_error (bfd_error_bad_value); |
4384 | return FALSE; | |
4385 | } | |
90f487df L |
4386 | } |
4387 | ||
8c37241b JJ |
4388 | /* Note that sgot is not involved in this |
4389 | calculation. We always want the start of .got.plt. If we | |
4390 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
4391 | permitted by the ABI, we might have to change this |
4392 | calculation. */ | |
6de2ae4a L |
4393 | relocation -= htab->elf.sgotplt->output_section->vma |
4394 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
4395 | break; |
4396 | ||
4397 | case R_386_GOTPC: | |
4398 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
4399 | relocation = htab->elf.sgotplt->output_section->vma |
4400 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 4401 | unresolved_reloc = FALSE; |
252b5132 RH |
4402 | break; |
4403 | ||
4404 | case R_386_PLT32: | |
4405 | /* Relocation is to the entry for this symbol in the | |
4406 | procedure linkage table. */ | |
4407 | ||
dd5724d5 | 4408 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 4409 | without using the procedure linkage table. */ |
252b5132 RH |
4410 | if (h == NULL) |
4411 | break; | |
4412 | ||
dd7e64d4 L |
4413 | if ((h->plt.offset == (bfd_vma) -1 |
4414 | && eh->plt_got.offset == (bfd_vma) -1) | |
6de2ae4a | 4415 | || htab->elf.splt == NULL) |
252b5132 RH |
4416 | { |
4417 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
4418 | happens when statically linking PIC code, or when |
4419 | using -Bsymbolic. */ | |
252b5132 RH |
4420 | break; |
4421 | } | |
4422 | ||
dd7e64d4 L |
4423 | if (h->plt.offset != (bfd_vma) -1) |
4424 | { | |
4425 | resolved_plt = htab->elf.splt; | |
4426 | plt_offset = h->plt.offset; | |
4427 | } | |
4428 | else | |
4429 | { | |
4430 | resolved_plt = htab->plt_got; | |
4431 | plt_offset = eh->plt_got.offset; | |
4432 | } | |
4433 | ||
4434 | relocation = (resolved_plt->output_section->vma | |
4435 | + resolved_plt->output_offset | |
4436 | + plt_offset); | |
b34976b6 | 4437 | unresolved_reloc = FALSE; |
252b5132 RH |
4438 | break; |
4439 | ||
1788fc08 | 4440 | case R_386_SIZE32: |
1788fc08 L |
4441 | /* Set to symbol size. */ |
4442 | relocation = st_size; | |
4443 | /* Fall through. */ | |
4444 | ||
252b5132 RH |
4445 | case R_386_32: |
4446 | case R_386_PC32: | |
3348747a NS |
4447 | if ((input_section->flags & SEC_ALLOC) == 0 |
4448 | || is_vxworks_tls) | |
ec338859 AM |
4449 | break; |
4450 | ||
aec6b87e L |
4451 | /* Copy dynamic function pointer relocations. Don't generate |
4452 | dynamic relocations against resolved undefined weak symbols | |
4453 | in PIE, except for R_386_PC32. */ | |
0e1862bb | 4454 | if ((bfd_link_pic (info) |
ef5aade5 | 4455 | && (h == NULL |
aec6b87e L |
4456 | || ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
4457 | && (!resolved_to_zero | |
4458 | || r_type == R_386_PC32)) | |
4459 | || h->root.type != bfd_link_hash_undefweak)) | |
1788fc08 | 4460 | && ((r_type != R_386_PC32 && r_type != R_386_SIZE32) |
f6c52c13 | 4461 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 | 4462 | || (ELIMINATE_COPY_RELOCS |
0e1862bb | 4463 | && !bfd_link_pic (info) |
12d0ee4a AM |
4464 | && h != NULL |
4465 | && h->dynindx != -1 | |
aec6b87e L |
4466 | && (!h->non_got_ref |
4467 | || eh->func_pointer_refcount > 0 | |
4468 | || (h->root.type == bfd_link_hash_undefweak | |
4469 | && !resolved_to_zero)) | |
bae420ef L |
4470 | && ((h->def_dynamic && !h->def_regular) |
4471 | /* Undefined weak symbol is bound locally when | |
4472 | PIC is false. */ | |
4473 | || h->root.type == bfd_link_hash_undefweak))) | |
252b5132 | 4474 | { |
947216bf | 4475 | Elf_Internal_Rela outrel; |
b34976b6 | 4476 | bfd_boolean skip, relocate; |
0c715baa | 4477 | asection *sreloc; |
252b5132 RH |
4478 | |
4479 | /* When generating a shared object, these relocations | |
4480 | are copied into the output file to be resolved at run | |
4481 | time. */ | |
4482 | ||
b34976b6 AM |
4483 | skip = FALSE; |
4484 | relocate = FALSE; | |
252b5132 | 4485 | |
c629eae0 JJ |
4486 | outrel.r_offset = |
4487 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
4488 | rel->r_offset); | |
4489 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 4490 | skip = TRUE; |
0bb2d96a | 4491 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 4492 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
4493 | outrel.r_offset += (input_section->output_section->vma |
4494 | + input_section->output_offset); | |
4495 | ||
4496 | if (skip) | |
0bb2d96a | 4497 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
4498 | else if (h != NULL |
4499 | && h->dynindx != -1 | |
4500 | && (r_type == R_386_PC32 | |
4e0c91e4 L |
4501 | || !(bfd_link_executable (info) |
4502 | || SYMBOLIC_BIND (info, h)) | |
f5385ebf | 4503 | || !h->def_regular)) |
0bb2d96a | 4504 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
4505 | else |
4506 | { | |
5a15f56f | 4507 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 4508 | relocate = TRUE; |
5a15f56f | 4509 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
4510 | } |
4511 | ||
cbe950e9 | 4512 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 4513 | |
62d78908 L |
4514 | if (sreloc == NULL || sreloc->contents == NULL) |
4515 | { | |
4516 | r = bfd_reloc_notsupported; | |
4517 | goto check_relocation_error; | |
4518 | } | |
0c715baa | 4519 | |
59d6ffb2 | 4520 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
4521 | |
4522 | /* If this reloc is against an external symbol, we do | |
4523 | not want to fiddle with the addend. Otherwise, we | |
4524 | need to include the symbol value so that it becomes | |
4525 | an addend for the dynamic reloc. */ | |
0f88be7a | 4526 | if (! relocate) |
252b5132 RH |
4527 | continue; |
4528 | } | |
252b5132 RH |
4529 | break; |
4530 | ||
37e55690 | 4531 | case R_386_TLS_IE: |
0e1862bb | 4532 | if (!bfd_link_executable (info)) |
37e55690 | 4533 | { |
947216bf | 4534 | Elf_Internal_Rela outrel; |
37e55690 | 4535 | asection *sreloc; |
37e55690 JJ |
4536 | |
4537 | outrel.r_offset = rel->r_offset | |
4538 | + input_section->output_section->vma | |
4539 | + input_section->output_offset; | |
4540 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
4541 | sreloc = elf_section_data (input_section)->sreloc; | |
4542 | if (sreloc == NULL) | |
4543 | abort (); | |
59d6ffb2 | 4544 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4545 | } |
4546 | /* Fall through */ | |
4547 | ||
13ae64f3 | 4548 | case R_386_TLS_GD: |
67a4f2b7 AO |
4549 | case R_386_TLS_GOTDESC: |
4550 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 4551 | case R_386_TLS_IE_32: |
37e55690 | 4552 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
4553 | tls_type = GOT_UNKNOWN; |
4554 | if (h == NULL && local_got_offsets) | |
4555 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
4556 | else if (h != NULL) | |
142411ca | 4557 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
4558 | if (tls_type == GOT_TLS_IE) |
4559 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
4560 | |
4561 | if (! elf_i386_tls_transition (info, input_bfd, | |
4562 | input_section, contents, | |
4563 | symtab_hdr, sym_hashes, | |
4564 | &r_type, tls_type, rel, | |
bedfd056 | 4565 | relend, h, r_symndx, TRUE)) |
142411ca | 4566 | return FALSE; |
13ae64f3 JJ |
4567 | |
4568 | if (r_type == R_386_TLS_LE_32) | |
4569 | { | |
82e51918 | 4570 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
4571 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
4572 | { | |
142411ca | 4573 | unsigned int type; |
13ae64f3 JJ |
4574 | bfd_vma roff; |
4575 | ||
4576 | /* GD->LE transition. */ | |
6eaa7fb5 | 4577 | type = *(contents + rel->r_offset - 2); |
13ae64f3 JJ |
4578 | if (type == 0x04) |
4579 | { | |
6eaa7fb5 L |
4580 | /* Change |
4581 | leal foo@tlsgd(,%ebx,1), %eax | |
4582 | call ___tls_get_addr@PLT | |
4583 | into: | |
4584 | movl %gs:0, %eax | |
4585 | subl $foo@tpoff, %eax | |
13ae64f3 | 4586 | (6 byte form of subl). */ |
142411ca | 4587 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
4588 | } |
4589 | else | |
4590 | { | |
6eaa7fb5 L |
4591 | /* Change |
4592 | leal foo@tlsgd(%ebx), %eax | |
4593 | call ___tls_get_addr@PLT | |
4594 | nop | |
4595 | or | |
4596 | leal foo@tlsgd(%reg), %eax | |
4597 | call *___tls_get_addr@GOT(%reg) | |
4598 | which may be converted to | |
4599 | addr32 call ___tls_get_addr | |
4600 | into: | |
4601 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
142411ca | 4602 | (6 byte form of subl). */ |
142411ca | 4603 | roff = rel->r_offset + 6; |
13ae64f3 | 4604 | } |
6eaa7fb5 L |
4605 | memcpy (contents + roff - 8, |
4606 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
eb4ff4d6 | 4607 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 4608 | contents + roff); |
6eaa7fb5 | 4609 | /* Skip R_386_PC32, R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4610 | rel++; |
60f2e42e | 4611 | wrel++; |
13ae64f3 JJ |
4612 | continue; |
4613 | } | |
67a4f2b7 AO |
4614 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4615 | { | |
4616 | /* GDesc -> LE transition. | |
4617 | It's originally something like: | |
4618 | leal x@tlsdesc(%ebx), %eax | |
4619 | ||
4620 | leal x@ntpoff, %eax | |
4621 | ||
4622 | Registers other than %eax may be set up here. */ | |
4623 | ||
142411ca | 4624 | unsigned int val; |
67a4f2b7 AO |
4625 | bfd_vma roff; |
4626 | ||
67a4f2b7 | 4627 | roff = rel->r_offset; |
67a4f2b7 | 4628 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
4629 | |
4630 | /* Now modify the instruction as appropriate. */ | |
4631 | /* aoliva FIXME: remove the above and xor the byte | |
4632 | below with 0x86. */ | |
4633 | bfd_put_8 (output_bfd, val ^ 0x86, | |
4634 | contents + roff - 1); | |
eb4ff4d6 | 4635 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
4636 | contents + roff); |
4637 | continue; | |
4638 | } | |
4639 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4640 | { | |
4641 | /* GDesc -> LE transition. | |
4642 | It's originally: | |
4643 | call *(%eax) | |
4644 | Turn it into: | |
142411ca | 4645 | xchg %ax,%ax */ |
67a4f2b7 | 4646 | |
67a4f2b7 | 4647 | bfd_vma roff; |
6bbec505 | 4648 | |
67a4f2b7 | 4649 | roff = rel->r_offset; |
10efb593 | 4650 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
4651 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4652 | continue; | |
4653 | } | |
37e55690 | 4654 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 4655 | { |
142411ca | 4656 | unsigned int val; |
13ae64f3 JJ |
4657 | |
4658 | /* IE->LE transition: | |
37e55690 JJ |
4659 | Originally it can be one of: |
4660 | movl foo, %eax | |
4661 | movl foo, %reg | |
4662 | addl foo, %reg | |
4663 | We change it into: | |
4664 | movl $foo, %eax | |
4665 | movl $foo, %reg | |
4666 | addl $foo, %reg. */ | |
37e55690 | 4667 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
4668 | if (val == 0xa1) |
4669 | { | |
4670 | /* movl foo, %eax. */ | |
55fd94b0 AM |
4671 | bfd_put_8 (output_bfd, 0xb8, |
4672 | contents + rel->r_offset - 1); | |
37e55690 | 4673 | } |
299bf759 | 4674 | else |
37e55690 | 4675 | { |
142411ca L |
4676 | unsigned int type; |
4677 | ||
55fd94b0 AM |
4678 | type = bfd_get_8 (input_bfd, |
4679 | contents + rel->r_offset - 2); | |
299bf759 | 4680 | switch (type) |
26e41594 | 4681 | { |
299bf759 L |
4682 | case 0x8b: |
4683 | /* movl */ | |
299bf759 L |
4684 | bfd_put_8 (output_bfd, 0xc7, |
4685 | contents + rel->r_offset - 2); | |
4686 | bfd_put_8 (output_bfd, | |
4687 | 0xc0 | ((val >> 3) & 7), | |
4688 | contents + rel->r_offset - 1); | |
4689 | break; | |
4690 | case 0x03: | |
4691 | /* addl */ | |
299bf759 L |
4692 | bfd_put_8 (output_bfd, 0x81, |
4693 | contents + rel->r_offset - 2); | |
4694 | bfd_put_8 (output_bfd, | |
4695 | 0xc0 | ((val >> 3) & 7), | |
4696 | contents + rel->r_offset - 1); | |
4697 | break; | |
4698 | default: | |
4699 | BFD_FAIL (); | |
4700 | break; | |
26e41594 | 4701 | } |
37e55690 | 4702 | } |
eb4ff4d6 | 4703 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4704 | contents + rel->r_offset); |
4705 | continue; | |
4706 | } | |
4707 | else | |
4708 | { | |
4709 | unsigned int val, type; | |
4710 | ||
4711 | /* {IE_32,GOTIE}->LE transition: | |
4712 | Originally it can be one of: | |
13ae64f3 | 4713 | subl foo(%reg1), %reg2 |
13ae64f3 | 4714 | movl foo(%reg1), %reg2 |
37e55690 | 4715 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
4716 | We change it into: |
4717 | subl $foo, %reg2 | |
37e55690 JJ |
4718 | movl $foo, %reg2 (6 byte form) |
4719 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
4720 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
4721 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4722 | if (type == 0x8b) |
4723 | { | |
4724 | /* movl */ | |
13ae64f3 JJ |
4725 | bfd_put_8 (output_bfd, 0xc7, |
4726 | contents + rel->r_offset - 2); | |
4727 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4728 | contents + rel->r_offset - 1); | |
4729 | } | |
4730 | else if (type == 0x2b) | |
4731 | { | |
4732 | /* subl */ | |
13ae64f3 JJ |
4733 | bfd_put_8 (output_bfd, 0x81, |
4734 | contents + rel->r_offset - 2); | |
4735 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
4736 | contents + rel->r_offset - 1); | |
4737 | } | |
37e55690 JJ |
4738 | else if (type == 0x03) |
4739 | { | |
4740 | /* addl */ | |
4741 | bfd_put_8 (output_bfd, 0x81, | |
4742 | contents + rel->r_offset - 2); | |
4743 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4744 | contents + rel->r_offset - 1); | |
4745 | } | |
13ae64f3 JJ |
4746 | else |
4747 | BFD_FAIL (); | |
37e55690 | 4748 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4749 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4750 | contents + rel->r_offset); |
4751 | else | |
eb4ff4d6 | 4752 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4753 | contents + rel->r_offset); |
13ae64f3 JJ |
4754 | continue; |
4755 | } | |
4756 | } | |
4757 | ||
6de2ae4a | 4758 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4759 | abort (); |
4760 | ||
4761 | if (h != NULL) | |
67a4f2b7 AO |
4762 | { |
4763 | off = h->got.offset; | |
4764 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4765 | } | |
13ae64f3 JJ |
4766 | else |
4767 | { | |
4768 | if (local_got_offsets == NULL) | |
4769 | abort (); | |
4770 | ||
4771 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4772 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4773 | } |
4774 | ||
4775 | if ((off & 1) != 0) | |
4776 | off &= ~1; | |
26e41594 | 4777 | else |
13ae64f3 | 4778 | { |
947216bf | 4779 | Elf_Internal_Rela outrel; |
91d6fa6a | 4780 | int dr_type; |
67a4f2b7 | 4781 | asection *sreloc; |
13ae64f3 | 4782 | |
6de2ae4a | 4783 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4784 | abort (); |
4785 | ||
67a4f2b7 AO |
4786 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4787 | ||
4788 | if (GOT_TLS_GDESC_P (tls_type)) | |
4789 | { | |
59d6ffb2 | 4790 | bfd_byte *loc; |
67a4f2b7 AO |
4791 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4792 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4793 | <= htab->elf.sgotplt->size); |
4794 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4795 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4796 | + offplt |
4797 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4798 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4799 | loc = sreloc->contents; |
5ae0bfb6 RS |
4800 | loc += (htab->next_tls_desc_index++ |
4801 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4802 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4803 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4804 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4805 | if (indx == 0) | |
4806 | { | |
4807 | BFD_ASSERT (! unresolved_reloc); | |
4808 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4809 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4810 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4811 | + htab->sgotplt_jump_table_size + 4); |
4812 | } | |
4813 | else | |
4814 | { | |
4815 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4816 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4817 | + htab->sgotplt_jump_table_size + 4); |
4818 | } | |
4819 | } | |
4820 | ||
6de2ae4a | 4821 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4822 | |
6de2ae4a L |
4823 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4824 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4825 | |
67a4f2b7 | 4826 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4827 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4828 | else if (GOT_TLS_GDESC_P (tls_type)) |
4829 | goto dr_done; | |
37e55690 JJ |
4830 | else if (tls_type == GOT_TLS_IE_POS) |
4831 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4832 | else |
4833 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4834 | |
37e55690 | 4835 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4836 | bfd_put_32 (output_bfd, |
4837 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4838 | htab->elf.sgot->contents + off); |
37e55690 | 4839 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4840 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4841 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4842 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4843 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4844 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4845 | htab->elf.sgot->contents + off); |
13ae64f3 | 4846 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4847 | |
59d6ffb2 | 4848 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4849 | |
67a4f2b7 | 4850 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4851 | { |
4852 | if (indx == 0) | |
4853 | { | |
82e51918 | 4854 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4855 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4856 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4857 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4858 | } |
4859 | else | |
4860 | { | |
4861 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4862 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4863 | outrel.r_info = ELF32_R_INFO (indx, |
4864 | R_386_TLS_DTPOFF32); | |
4865 | outrel.r_offset += 4; | |
59d6ffb2 | 4866 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4867 | } |
4868 | } | |
37e55690 JJ |
4869 | else if (tls_type == GOT_TLS_IE_BOTH) |
4870 | { | |
4871 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4872 | (indx == 0 |
4873 | ? relocation - elf_i386_dtpoff_base (info) | |
4874 | : 0), | |
6de2ae4a | 4875 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4876 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4877 | outrel.r_offset += 4; | |
59d6ffb2 | 4878 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4879 | } |
13ae64f3 | 4880 | |
67a4f2b7 | 4881 | dr_done: |
13ae64f3 JJ |
4882 | if (h != NULL) |
4883 | h->got.offset |= 1; | |
4884 | else | |
4885 | local_got_offsets[r_symndx] |= 1; | |
4886 | } | |
4887 | ||
67a4f2b7 AO |
4888 | if (off >= (bfd_vma) -2 |
4889 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4890 | abort (); |
67a4f2b7 AO |
4891 | if (r_type == R_386_TLS_GOTDESC |
4892 | || r_type == R_386_TLS_DESC_CALL) | |
4893 | { | |
4894 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4895 | unresolved_reloc = FALSE; | |
4896 | } | |
4897 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4898 | { |
6de2ae4a L |
4899 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4900 | + htab->elf.sgotplt->output_offset; | |
4901 | relocation = htab->elf.sgot->output_section->vma | |
4902 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4903 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4904 | && tls_type == GOT_TLS_IE_BOTH) | |
4905 | relocation += 4; | |
4906 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4907 | relocation += g_o_t; |
b34976b6 | 4908 | unresolved_reloc = FALSE; |
13ae64f3 | 4909 | } |
67a4f2b7 | 4910 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4911 | { |
4912 | unsigned int val, type; | |
4913 | bfd_vma roff; | |
4914 | ||
4915 | /* GD->IE transition. */ | |
6eaa7fb5 L |
4916 | type = *(contents + rel->r_offset - 2); |
4917 | val = *(contents + rel->r_offset - 1); | |
13ae64f3 JJ |
4918 | if (type == 0x04) |
4919 | { | |
6eaa7fb5 L |
4920 | /* Change |
4921 | leal foo@tlsgd(,%ebx,1), %eax | |
4922 | call ___tls_get_addr@PLT | |
4923 | into: | |
4924 | movl %gs:0, %eax | |
4925 | subl $foo@gottpoff(%ebx), %eax. */ | |
13ae64f3 | 4926 | val >>= 3; |
142411ca | 4927 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4928 | } |
4929 | else | |
4930 | { | |
6eaa7fb5 L |
4931 | /* Change |
4932 | leal foo@tlsgd(%ebx), %eax | |
4933 | call ___tls_get_addr@PLT | |
4934 | nop | |
4935 | or | |
4936 | leal foo@tlsgd(%reg), %eax | |
4937 | call *___tls_get_addr@GOT(%reg) | |
4938 | which may be converted to | |
4939 | addr32 call ___tls_get_addr | |
4940 | into: | |
4941 | movl %gs:0, %eax; | |
4942 | subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4943 | roff = rel->r_offset - 2; |
4944 | } | |
4945 | memcpy (contents + roff, | |
4946 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4947 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4948 | /* If foo is used only with foo@gotntpoff(%reg) and |
4949 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4950 | subl $foo@gottpoff(%reg), %eax | |
4951 | into: | |
4952 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4953 | if (tls_type == GOT_TLS_IE_POS) |
4954 | contents[roff + 6] = 0x03; | |
8c37241b | 4955 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4956 | htab->elf.sgot->output_section->vma |
4957 | + htab->elf.sgot->output_offset + off | |
4958 | - htab->elf.sgotplt->output_section->vma | |
4959 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 | 4960 | contents + roff + 8); |
6eaa7fb5 | 4961 | /* Skip R_386_PLT32 and R_386_GOT32X. */ |
13ae64f3 | 4962 | rel++; |
60f2e42e | 4963 | wrel++; |
13ae64f3 JJ |
4964 | continue; |
4965 | } | |
67a4f2b7 AO |
4966 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4967 | { | |
4968 | /* GDesc -> IE transition. | |
4969 | It's originally something like: | |
4970 | leal x@tlsdesc(%ebx), %eax | |
4971 | ||
4972 | Change it to: | |
142411ca | 4973 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4974 | or: |
4975 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4976 | ||
4977 | Registers other than %eax may be set up here. */ | |
4978 | ||
67a4f2b7 AO |
4979 | bfd_vma roff; |
4980 | ||
4981 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4982 | offset into any register, although it's probably | |
4983 | almost always going to be eax. */ | |
4984 | roff = rel->r_offset; | |
67a4f2b7 AO |
4985 | |
4986 | /* Now modify the instruction as appropriate. */ | |
4987 | /* To turn a leal into a movl in the form we use it, it | |
4988 | suffices to change the first byte from 0x8d to 0x8b. | |
4989 | aoliva FIXME: should we decide to keep the leal, all | |
4990 | we have to do is remove the statement below, and | |
4991 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4992 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4993 | ||
4994 | if (tls_type == GOT_TLS_IE_BOTH) | |
4995 | off += 4; | |
4996 | ||
4997 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4998 | htab->elf.sgot->output_section->vma |
4999 | + htab->elf.sgot->output_offset + off | |
5000 | - htab->elf.sgotplt->output_section->vma | |
5001 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
5002 | contents + roff); |
5003 | continue; | |
5004 | } | |
5005 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
5006 | { | |
5007 | /* GDesc -> IE transition. | |
5008 | It's originally: | |
5009 | call *(%eax) | |
5010 | ||
5011 | Change it to: | |
142411ca | 5012 | xchg %ax,%ax |
67a4f2b7 AO |
5013 | or |
5014 | negl %eax | |
5015 | depending on how we transformed the TLS_GOTDESC above. | |
5016 | */ | |
5017 | ||
67a4f2b7 AO |
5018 | bfd_vma roff; |
5019 | ||
67a4f2b7 | 5020 | roff = rel->r_offset; |
67a4f2b7 AO |
5021 | |
5022 | /* Now modify the instruction as appropriate. */ | |
5023 | if (tls_type != GOT_TLS_IE_NEG) | |
5024 | { | |
10efb593 L |
5025 | /* xchg %ax,%ax */ |
5026 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
5027 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
5028 | } | |
5029 | else | |
5030 | { | |
5031 | /* negl %eax */ | |
5032 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
5033 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
5034 | } | |
5035 | ||
5036 | continue; | |
5037 | } | |
5038 | else | |
5039 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
5040 | break; |
5041 | ||
5042 | case R_386_TLS_LDM: | |
142411ca L |
5043 | if (! elf_i386_tls_transition (info, input_bfd, |
5044 | input_section, contents, | |
5045 | symtab_hdr, sym_hashes, | |
5046 | &r_type, GOT_UNKNOWN, rel, | |
bedfd056 | 5047 | relend, h, r_symndx, TRUE)) |
142411ca | 5048 | return FALSE; |
13ae64f3 | 5049 | |
142411ca L |
5050 | if (r_type != R_386_TLS_LDM) |
5051 | { | |
6eaa7fb5 L |
5052 | /* LD->LE transition. Change |
5053 | leal foo@tlsldm(%ebx) %eax | |
5054 | call ___tls_get_addr@PLT | |
5055 | into: | |
5056 | movl %gs:0, %eax | |
5057 | nop | |
5058 | leal 0(%esi,1), %esi | |
5059 | or change | |
5060 | leal foo@tlsldm(%reg) %eax | |
5061 | call *___tls_get_addr@GOT(%reg) | |
5062 | which may be converted to | |
5063 | addr32 call ___tls_get_addr | |
5064 | into: | |
5065 | movl %gs:0, %eax | |
5066 | leal 0(%esi), %esi */ | |
142411ca | 5067 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
6eaa7fb5 L |
5068 | if (*(contents + rel->r_offset + 4) == 0xff |
5069 | || *(contents + rel->r_offset + 4) == 0x67) | |
5070 | memcpy (contents + rel->r_offset - 2, | |
5071 | "\x65\xa1\0\0\0\0\x8d\xb6\0\0\0", 12); | |
5072 | else | |
5073 | memcpy (contents + rel->r_offset - 2, | |
5074 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 5075 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 | 5076 | rel++; |
60f2e42e | 5077 | wrel++; |
13ae64f3 JJ |
5078 | continue; |
5079 | } | |
5080 | ||
6de2ae4a | 5081 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
5082 | abort (); |
5083 | ||
5084 | off = htab->tls_ldm_got.offset; | |
5085 | if (off & 1) | |
5086 | off &= ~1; | |
5087 | else | |
5088 | { | |
947216bf | 5089 | Elf_Internal_Rela outrel; |
13ae64f3 | 5090 | |
6de2ae4a | 5091 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
5092 | abort (); |
5093 | ||
6de2ae4a L |
5094 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
5095 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
5096 | |
5097 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 5098 | htab->elf.sgot->contents + off); |
13ae64f3 | 5099 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 5100 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 5101 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 5102 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
5103 | htab->tls_ldm_got.offset |= 1; |
5104 | } | |
6de2ae4a L |
5105 | relocation = htab->elf.sgot->output_section->vma |
5106 | + htab->elf.sgot->output_offset + off | |
5107 | - htab->elf.sgotplt->output_section->vma | |
5108 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 5109 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
5110 | break; |
5111 | ||
5112 | case R_386_TLS_LDO_32: | |
0e1862bb L |
5113 | if (!bfd_link_executable (info) |
5114 | || (input_section->flags & SEC_CODE) == 0) | |
eb4ff4d6 | 5115 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
5116 | else |
5117 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 5118 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5119 | break; |
5120 | ||
5121 | case R_386_TLS_LE_32: | |
13ae64f3 | 5122 | case R_386_TLS_LE: |
0e1862bb | 5123 | if (!bfd_link_executable (info)) |
37e55690 | 5124 | { |
947216bf | 5125 | Elf_Internal_Rela outrel; |
37e55690 | 5126 | asection *sreloc; |
37e55690 JJ |
5127 | |
5128 | outrel.r_offset = rel->r_offset | |
5129 | + input_section->output_section->vma | |
5130 | + input_section->output_offset; | |
5131 | if (h != NULL && h->dynindx != -1) | |
5132 | indx = h->dynindx; | |
5133 | else | |
5134 | indx = 0; | |
5135 | if (r_type == R_386_TLS_LE_32) | |
5136 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
5137 | else | |
5138 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
5139 | sreloc = elf_section_data (input_section)->sreloc; | |
5140 | if (sreloc == NULL) | |
5141 | abort (); | |
59d6ffb2 | 5142 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
5143 | if (indx) |
5144 | continue; | |
5145 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5146 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 5147 | else |
eb4ff4d6 | 5148 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
5149 | } |
5150 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 5151 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 5152 | else |
eb4ff4d6 | 5153 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
5154 | break; |
5155 | ||
252b5132 RH |
5156 | default: |
5157 | break; | |
5158 | } | |
5159 | ||
239e1f3a AM |
5160 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
5161 | because such sections are not SEC_ALLOC and thus ld.so will | |
5162 | not process them. */ | |
8c694914 | 5163 | if (unresolved_reloc |
239e1f3a | 5164 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
5165 | && h->def_dynamic) |
5166 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
5167 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d | 5168 | { |
4eca0228 | 5169 | _bfd_error_handler |
695344c0 | 5170 | /* xgettext:c-format */ |
843fe662 | 5171 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
5172 | input_bfd, |
5173 | input_section, | |
6a30718d | 5174 | (long) rel->r_offset, |
843fe662 | 5175 | howto->name, |
6a30718d | 5176 | h->root.root.string); |
b34976b6 | 5177 | return FALSE; |
6a30718d | 5178 | } |
83be169b | 5179 | |
cbe950e9 | 5180 | do_relocation: |
252b5132 RH |
5181 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
5182 | contents, rel->r_offset, | |
55fd94b0 | 5183 | relocation, 0); |
252b5132 | 5184 | |
62d78908 | 5185 | check_relocation_error: |
cf5c0c5b | 5186 | if (r != bfd_reloc_ok) |
252b5132 | 5187 | { |
cf5c0c5b | 5188 | const char *name; |
ffb2e45b | 5189 | |
cf5c0c5b AM |
5190 | if (h != NULL) |
5191 | name = h->root.root.string; | |
5192 | else | |
5193 | { | |
5194 | name = bfd_elf_string_from_elf_section (input_bfd, | |
5195 | symtab_hdr->sh_link, | |
5196 | sym->st_name); | |
5197 | if (name == NULL) | |
b34976b6 | 5198 | return FALSE; |
cf5c0c5b AM |
5199 | if (*name == '\0') |
5200 | name = bfd_section_name (input_bfd, sec); | |
5201 | } | |
ffb2e45b | 5202 | |
cf5c0c5b | 5203 | if (r == bfd_reloc_overflow) |
1a72702b AM |
5204 | (*info->callbacks->reloc_overflow) |
5205 | (info, (h ? &h->root : NULL), name, howto->name, | |
5206 | (bfd_vma) 0, input_bfd, input_section, rel->r_offset); | |
cf5c0c5b AM |
5207 | else |
5208 | { | |
4eca0228 | 5209 | _bfd_error_handler |
695344c0 | 5210 | /* xgettext:c-format */ |
d003868e AM |
5211 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
5212 | input_bfd, input_section, | |
cf5c0c5b | 5213 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 5214 | return FALSE; |
cf5c0c5b | 5215 | } |
252b5132 | 5216 | } |
60f2e42e L |
5217 | |
5218 | if (wrel != rel) | |
5219 | *wrel = *rel; | |
5220 | } | |
5221 | ||
5222 | if (wrel != rel) | |
5223 | { | |
5224 | Elf_Internal_Shdr *rel_hdr; | |
5225 | size_t deleted = rel - wrel; | |
5226 | ||
5227 | rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); | |
5228 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5229 | if (rel_hdr->sh_size == 0) | |
5230 | { | |
5231 | /* It is too late to remove an empty reloc section. Leave | |
5232 | one NONE reloc. | |
5233 | ??? What is wrong with an empty section??? */ | |
5234 | rel_hdr->sh_size = rel_hdr->sh_entsize; | |
5235 | deleted -= 1; | |
5236 | } | |
5237 | rel_hdr = _bfd_elf_single_rel_hdr (input_section); | |
5238 | rel_hdr->sh_size -= rel_hdr->sh_entsize * deleted; | |
5239 | input_section->reloc_count -= deleted; | |
252b5132 RH |
5240 | } |
5241 | ||
b34976b6 | 5242 | return TRUE; |
252b5132 RH |
5243 | } |
5244 | ||
5245 | /* Finish up dynamic symbol handling. We set the contents of various | |
5246 | dynamic sections here. */ | |
5247 | ||
b34976b6 | 5248 | static bfd_boolean |
55fd94b0 AM |
5249 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
5250 | struct bfd_link_info *info, | |
5251 | struct elf_link_hash_entry *h, | |
5252 | Elf_Internal_Sym *sym) | |
252b5132 | 5253 | { |
6725bdbf | 5254 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
5255 | unsigned plt_entry_size; |
5256 | const struct elf_i386_backend_data *abed; | |
dd7e64d4 | 5257 | struct elf_i386_link_hash_entry *eh; |
aec6b87e | 5258 | bfd_boolean local_undefweak; |
252b5132 | 5259 | |
6725bdbf | 5260 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5261 | if (htab == NULL) |
5262 | return FALSE; | |
252b5132 | 5263 | |
25e762b9 | 5264 | abed = get_elf_i386_backend_data (output_bfd); |
f604c2a2 | 5265 | plt_entry_size = htab->plt.plt_entry_size; |
25e762b9 | 5266 | |
dd7e64d4 | 5267 | eh = (struct elf_i386_link_hash_entry *) h; |
e133d005 L |
5268 | if (eh->no_finish_dynamic_symbol) |
5269 | abort (); | |
dd7e64d4 | 5270 | |
aec6b87e L |
5271 | /* We keep PLT/GOT entries without dynamic PLT/GOT relocations for |
5272 | resolved undefined weak symbols in executable so that their | |
5273 | references have value 0 at run-time. */ | |
e62b9723 L |
5274 | local_undefweak = UNDEFINED_WEAK_RESOLVED_TO_ZERO (info, |
5275 | eh->has_got_reloc, | |
5276 | eh); | |
aec6b87e | 5277 | |
252b5132 RH |
5278 | if (h->plt.offset != (bfd_vma) -1) |
5279 | { | |
252b5132 RH |
5280 | bfd_vma plt_index; |
5281 | bfd_vma got_offset; | |
947216bf AM |
5282 | Elf_Internal_Rela rel; |
5283 | bfd_byte *loc; | |
cbe950e9 L |
5284 | asection *plt, *gotplt, *relplt; |
5285 | ||
5286 | /* When building a static executable, use .iplt, .igot.plt and | |
5287 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 5288 | if (htab->elf.splt != NULL) |
cbe950e9 | 5289 | { |
6de2ae4a L |
5290 | plt = htab->elf.splt; |
5291 | gotplt = htab->elf.sgotplt; | |
5292 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
5293 | } |
5294 | else | |
5295 | { | |
6de2ae4a L |
5296 | plt = htab->elf.iplt; |
5297 | gotplt = htab->elf.igotplt; | |
5298 | relplt = htab->elf.irelplt; | |
cbe950e9 | 5299 | } |
252b5132 RH |
5300 | |
5301 | /* This symbol has an entry in the procedure linkage table. Set | |
5302 | it up. */ | |
5303 | ||
cbe950e9 | 5304 | if ((h->dynindx == -1 |
aec6b87e | 5305 | && !local_undefweak |
0e1862bb | 5306 | && !((h->forced_local || bfd_link_executable (info)) |
cbe950e9 L |
5307 | && h->def_regular |
5308 | && h->type == STT_GNU_IFUNC)) | |
5309 | || plt == NULL | |
5310 | || gotplt == NULL | |
5311 | || relplt == NULL) | |
cec7f46a | 5312 | abort (); |
252b5132 RH |
5313 | |
5314 | /* Get the index in the procedure linkage table which | |
5315 | corresponds to this symbol. This is the index of this symbol | |
5316 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 5317 | first entry in the procedure linkage table is reserved. |
252b5132 | 5318 | |
cbe950e9 | 5319 | Get the offset into the .got table of the entry that |
252b5132 | 5320 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 5321 | The first three are reserved. |
6bbec505 | 5322 | |
cbe950e9 L |
5323 | For static executables, we don't reserve anything. */ |
5324 | ||
6de2ae4a | 5325 | if (plt == htab->elf.splt) |
cbe950e9 | 5326 | { |
f604c2a2 L |
5327 | got_offset = (h->plt.offset / plt_entry_size |
5328 | - htab->plt.has_plt0); | |
e1f98742 | 5329 | got_offset = (got_offset + 3) * 4; |
cbe950e9 L |
5330 | } |
5331 | else | |
5332 | { | |
e1f98742 L |
5333 | got_offset = h->plt.offset / plt_entry_size; |
5334 | got_offset = got_offset * 4; | |
cbe950e9 | 5335 | } |
252b5132 | 5336 | |
f604c2a2 L |
5337 | /* Fill in the entry in the procedure linkage table and update |
5338 | the first slot. */ | |
5339 | memcpy (plt->contents + h->plt.offset, htab->plt.plt_entry, | |
5340 | plt_entry_size); | |
0e1862bb | 5341 | if (! bfd_link_pic (info)) |
252b5132 | 5342 | { |
252b5132 | 5343 | bfd_put_32 (output_bfd, |
cbe950e9 L |
5344 | (gotplt->output_section->vma |
5345 | + gotplt->output_offset | |
252b5132 | 5346 | + got_offset), |
25e762b9 | 5347 | plt->contents + h->plt.offset |
f604c2a2 | 5348 | + htab->plt.plt_got_offset); |
eac338cf | 5349 | |
f604c2a2 | 5350 | if (abed->os == is_vxworks) |
eac338cf PB |
5351 | { |
5352 | int s, k, reloc_index; | |
5353 | ||
5354 | /* Create the R_386_32 relocation referencing the GOT | |
5355 | for this PLT entry. */ | |
5356 | ||
5357 | /* S: Current slot number (zero-based). */ | |
f604c2a2 L |
5358 | s = ((h->plt.offset - htab->plt.plt_entry_size) |
5359 | / htab->plt.plt_entry_size); | |
eac338cf | 5360 | /* K: Number of relocations for PLTResolve. */ |
0e1862bb | 5361 | if (bfd_link_pic (info)) |
eac338cf PB |
5362 | k = PLTRESOLVE_RELOCS_SHLIB; |
5363 | else | |
5364 | k = PLTRESOLVE_RELOCS; | |
5365 | /* Skip the PLTresolve relocations, and the relocations for | |
5366 | the other PLT slots. */ | |
5367 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
5368 | loc = (htab->srelplt2->contents + reloc_index | |
5369 | * sizeof (Elf32_External_Rel)); | |
5370 | ||
6de2ae4a L |
5371 | rel.r_offset = (htab->elf.splt->output_section->vma |
5372 | + htab->elf.splt->output_offset | |
eac338cf | 5373 | + h->plt.offset + 2), |
7325306f | 5374 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
5375 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
5376 | ||
5377 | /* Create the R_386_32 relocation referencing the beginning of | |
5378 | the PLT for this GOT entry. */ | |
6de2ae4a L |
5379 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
5380 | + htab->elf.sgotplt->output_offset | |
eac338cf | 5381 | + got_offset); |
7325306f | 5382 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 5383 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 5384 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 5385 | } |
252b5132 RH |
5386 | } |
5387 | else | |
5388 | { | |
252b5132 | 5389 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 | 5390 | plt->contents + h->plt.offset |
f604c2a2 | 5391 | + htab->plt.plt_got_offset); |
252b5132 RH |
5392 | } |
5393 | ||
aec6b87e L |
5394 | /* Fill in the entry in the global offset table. Leave the entry |
5395 | as zero for undefined weak symbol in PIE. No PLT relocation | |
5396 | against undefined weak symbol in PIE. */ | |
5397 | if (!local_undefweak) | |
cbe950e9 | 5398 | { |
f604c2a2 L |
5399 | if (htab->plt.has_plt0) |
5400 | bfd_put_32 (output_bfd, | |
5401 | (plt->output_section->vma | |
5402 | + plt->output_offset | |
5403 | + h->plt.offset | |
5404 | + htab->lazy_plt->plt_lazy_offset), | |
5405 | gotplt->contents + got_offset); | |
252b5132 | 5406 | |
aec6b87e L |
5407 | /* Fill in the entry in the .rel.plt section. */ |
5408 | rel.r_offset = (gotplt->output_section->vma | |
5409 | + gotplt->output_offset | |
5410 | + got_offset); | |
5411 | if (h->dynindx == -1 | |
5412 | || ((bfd_link_executable (info) | |
5413 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
5414 | && h->def_regular | |
5415 | && h->type == STT_GNU_IFUNC)) | |
5416 | { | |
6322e5c5 L |
5417 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5418 | h->root.root.string, | |
5419 | h->root.u.def.section->owner); | |
5420 | ||
aec6b87e L |
5421 | /* If an STT_GNU_IFUNC symbol is locally defined, generate |
5422 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
5423 | in the .got.plt section. */ | |
5424 | bfd_put_32 (output_bfd, | |
5425 | (h->root.u.def.value | |
5426 | + h->root.u.def.section->output_section->vma | |
5427 | + h->root.u.def.section->output_offset), | |
5428 | gotplt->contents + got_offset); | |
5429 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5430 | /* R_386_IRELATIVE comes last. */ | |
5431 | plt_index = htab->next_irelative_index--; | |
5432 | } | |
5433 | else | |
5434 | { | |
5435 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
5436 | plt_index = htab->next_jump_slot_index++; | |
5437 | } | |
5438 | ||
5439 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
5440 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
5441 | ||
f604c2a2 L |
5442 | /* Don't fill the second and third slots in PLT entry for |
5443 | static executables nor without PLT0. */ | |
5444 | if (plt == htab->elf.splt && htab->plt.has_plt0) | |
aec6b87e L |
5445 | { |
5446 | bfd_put_32 (output_bfd, | |
5447 | plt_index * sizeof (Elf32_External_Rel), | |
5448 | plt->contents + h->plt.offset | |
f604c2a2 L |
5449 | + htab->lazy_plt->plt_reloc_offset); |
5450 | bfd_put_32 (output_bfd, | |
5451 | - (h->plt.offset | |
5452 | + htab->lazy_plt->plt_plt_offset + 4), | |
5453 | (plt->contents + h->plt.offset | |
5454 | + htab->lazy_plt->plt_plt_offset)); | |
aec6b87e | 5455 | } |
e1f98742 | 5456 | } |
dd7e64d4 L |
5457 | } |
5458 | else if (eh->plt_got.offset != (bfd_vma) -1) | |
5459 | { | |
5460 | bfd_vma got_offset, plt_offset; | |
5461 | asection *plt, *got, *gotplt; | |
5462 | const bfd_byte *got_plt_entry; | |
5463 | ||
dd7e64d4 L |
5464 | /* Set the entry in the GOT procedure linkage table. */ |
5465 | plt = htab->plt_got; | |
5466 | got = htab->elf.sgot; | |
5467 | gotplt = htab->elf.sgotplt; | |
5468 | got_offset = h->got.offset; | |
5469 | ||
5470 | if (got_offset == (bfd_vma) -1 | |
5471 | || plt == NULL | |
5472 | || got == NULL | |
5473 | || gotplt == NULL) | |
5474 | abort (); | |
5475 | ||
5476 | /* Fill in the entry in the GOT procedure linkage table. */ | |
0e1862bb | 5477 | if (! bfd_link_pic (info)) |
252b5132 | 5478 | { |
f604c2a2 | 5479 | got_plt_entry = htab->non_lazy_plt->plt_entry; |
dd7e64d4 | 5480 | got_offset += got->output_section->vma + got->output_offset; |
252b5132 | 5481 | } |
dd7e64d4 L |
5482 | else |
5483 | { | |
f604c2a2 | 5484 | got_plt_entry = htab->non_lazy_plt->pic_plt_entry; |
dd7e64d4 L |
5485 | got_offset += (got->output_section->vma |
5486 | + got->output_offset | |
5487 | - gotplt->output_section->vma | |
5488 | - gotplt->output_offset); | |
5489 | } | |
5490 | ||
5491 | plt_offset = eh->plt_got.offset; | |
5492 | memcpy (plt->contents + plt_offset, got_plt_entry, | |
f604c2a2 | 5493 | htab->non_lazy_plt->plt_entry_size); |
dd7e64d4 | 5494 | bfd_put_32 (output_bfd, got_offset, |
f604c2a2 L |
5495 | (plt->contents + plt_offset |
5496 | + htab->non_lazy_plt->plt_got_offset)); | |
dd7e64d4 L |
5497 | } |
5498 | ||
aec6b87e L |
5499 | if (!local_undefweak |
5500 | && !h->def_regular | |
dd7e64d4 L |
5501 | && (h->plt.offset != (bfd_vma) -1 |
5502 | || eh->plt_got.offset != (bfd_vma) -1)) | |
5503 | { | |
5504 | /* Mark the symbol as undefined, rather than as defined in | |
5505 | the .plt section. Leave the value if there were any | |
5506 | relocations where pointer equality matters (this is a clue | |
5507 | for the dynamic linker, to make function pointer | |
5508 | comparisons work between an application and shared | |
5509 | library), otherwise set it to zero. If a function is only | |
5510 | called from a binary, there is no need to slow down | |
5511 | shared libraries because of that. */ | |
5512 | sym->st_shndx = SHN_UNDEF; | |
5513 | if (!h->pointer_equality_needed) | |
5514 | sym->st_value = 0; | |
252b5132 RH |
5515 | } |
5516 | ||
aec6b87e L |
5517 | /* Don't generate dynamic GOT relocation against undefined weak |
5518 | symbol in executable. */ | |
13ae64f3 | 5519 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 5520 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
aec6b87e L |
5521 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0 |
5522 | && !local_undefweak) | |
252b5132 | 5523 | { |
947216bf | 5524 | Elf_Internal_Rela rel; |
233cc9c1 | 5525 | asection *relgot = htab->elf.srelgot; |
252b5132 RH |
5526 | |
5527 | /* This symbol has an entry in the global offset table. Set it | |
5528 | up. */ | |
5529 | ||
6de2ae4a | 5530 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 5531 | abort (); |
252b5132 | 5532 | |
6de2ae4a L |
5533 | rel.r_offset = (htab->elf.sgot->output_section->vma |
5534 | + htab->elf.sgot->output_offset | |
dc810e39 | 5535 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 5536 | |
dd5724d5 AM |
5537 | /* If this is a static link, or it is a -Bsymbolic link and the |
5538 | symbol is defined locally or was forced to be local because | |
5539 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
5540 | The entry in the global offset table will already have been |
5541 | initialized in the relocate_section function. */ | |
710ab287 | 5542 | if (h->def_regular |
0018b0a3 L |
5543 | && h->type == STT_GNU_IFUNC) |
5544 | { | |
233cc9c1 L |
5545 | if (h->plt.offset == (bfd_vma) -1) |
5546 | { | |
5547 | /* STT_GNU_IFUNC is referenced without PLT. */ | |
5548 | if (htab->elf.splt == NULL) | |
5549 | { | |
5550 | /* use .rel[a].iplt section to store .got relocations | |
5551 | in static executable. */ | |
5552 | relgot = htab->elf.irelplt; | |
5553 | } | |
5554 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
5555 | { | |
6322e5c5 L |
5556 | info->callbacks->minfo (_("Local IFUNC function `%s' in %B\n"), |
5557 | h->root.root.string, | |
5558 | h->root.u.def.section->owner); | |
5559 | ||
233cc9c1 L |
5560 | bfd_put_32 (output_bfd, |
5561 | (h->root.u.def.value | |
5562 | + h->root.u.def.section->output_section->vma | |
5563 | + h->root.u.def.section->output_offset), | |
5564 | htab->elf.sgot->contents + h->got.offset); | |
5565 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
5566 | } | |
5567 | else | |
5568 | goto do_glob_dat; | |
5569 | } | |
5570 | else if (bfd_link_pic (info)) | |
710ab287 L |
5571 | { |
5572 | /* Generate R_386_GLOB_DAT. */ | |
5573 | goto do_glob_dat; | |
5574 | } | |
5575 | else | |
5576 | { | |
cd2b2c10 L |
5577 | asection *plt; |
5578 | ||
710ab287 L |
5579 | if (!h->pointer_equality_needed) |
5580 | abort (); | |
5581 | ||
5582 | /* For non-shared object, we can't use .got.plt, which | |
5583 | contains the real function addres if we need pointer | |
5584 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 5585 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
5586 | bfd_put_32 (output_bfd, |
5587 | (plt->output_section->vma | |
5588 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 5589 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
5590 | return TRUE; |
5591 | } | |
0018b0a3 | 5592 | } |
0e1862bb | 5593 | else if (bfd_link_pic (info) |
0018b0a3 | 5594 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 5595 | { |
6725bdbf | 5596 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
5597 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
5598 | } | |
252b5132 RH |
5599 | else |
5600 | { | |
dd5724d5 | 5601 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 5602 | do_glob_dat: |
6725bdbf | 5603 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 5604 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
5605 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
5606 | } | |
5607 | ||
233cc9c1 | 5608 | elf_append_rel (output_bfd, relgot, &rel); |
252b5132 RH |
5609 | } |
5610 | ||
f5385ebf | 5611 | if (h->needs_copy) |
252b5132 | 5612 | { |
947216bf | 5613 | Elf_Internal_Rela rel; |
5474d94f | 5614 | asection *s; |
252b5132 RH |
5615 | |
5616 | /* This symbol needs a copy reloc. Set it up. */ | |
5617 | ||
ffb2e45b AM |
5618 | if (h->dynindx == -1 |
5619 | || (h->root.type != bfd_link_hash_defined | |
5620 | && h->root.type != bfd_link_hash_defweak) | |
5474d94f AM |
5621 | || htab->elf.srelbss == NULL |
5622 | || htab->elf.sreldynrelro == NULL) | |
ffb2e45b | 5623 | abort (); |
252b5132 RH |
5624 | |
5625 | rel.r_offset = (h->root.u.def.value | |
5626 | + h->root.u.def.section->output_section->vma | |
5627 | + h->root.u.def.section->output_offset); | |
5628 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
afbf7e8e | 5629 | if (h->root.u.def.section == htab->elf.sdynrelro) |
5474d94f AM |
5630 | s = htab->elf.sreldynrelro; |
5631 | else | |
5632 | s = htab->elf.srelbss; | |
5633 | elf_append_rel (output_bfd, s, &rel); | |
252b5132 RH |
5634 | } |
5635 | ||
b34976b6 | 5636 | return TRUE; |
252b5132 RH |
5637 | } |
5638 | ||
c25bc9fc L |
5639 | /* Finish up local dynamic symbol handling. We set the contents of |
5640 | various dynamic sections here. */ | |
5641 | ||
5642 | static bfd_boolean | |
5643 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
5644 | { | |
5645 | struct elf_link_hash_entry *h | |
5646 | = (struct elf_link_hash_entry *) *slot; | |
5647 | struct bfd_link_info *info | |
23209a78 | 5648 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
5649 | |
5650 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
5651 | h, NULL); | |
5652 | } | |
5653 | ||
aec6b87e L |
5654 | /* Finish up undefined weak symbol handling in PIE. Fill its PLT entry |
5655 | here since undefined weak symbol may not be dynamic and may not be | |
5656 | called for elf_i386_finish_dynamic_symbol. */ | |
5657 | ||
5658 | static bfd_boolean | |
5659 | elf_i386_pie_finish_undefweak_symbol (struct bfd_hash_entry *bh, | |
5660 | void *inf) | |
5661 | { | |
5662 | struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) bh; | |
5663 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
5664 | ||
5665 | if (h->root.type != bfd_link_hash_undefweak | |
5666 | || h->dynindx != -1) | |
5667 | return TRUE; | |
5668 | ||
5669 | return elf_i386_finish_dynamic_symbol (info->output_bfd, | |
5670 | info, h, NULL); | |
5671 | } | |
5672 | ||
38701953 AM |
5673 | /* Used to decide how to sort relocs in an optimal manner for the |
5674 | dynamic linker, before writing them out. */ | |
5675 | ||
5676 | static enum elf_reloc_type_class | |
cae1fbbb | 5677 | elf_i386_reloc_type_class (const struct bfd_link_info *info, |
7e612e98 AM |
5678 | const asection *rel_sec ATTRIBUTE_UNUSED, |
5679 | const Elf_Internal_Rela *rela) | |
38701953 | 5680 | { |
cae1fbbb L |
5681 | bfd *abfd = info->output_bfd; |
5682 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); | |
5683 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
cae1fbbb | 5684 | |
d9e3b590 L |
5685 | if (htab->dynsym != NULL |
5686 | && htab->dynsym->contents != NULL) | |
5687 | { | |
5688 | /* Check relocation against STT_GNU_IFUNC symbol if there are | |
5689 | dynamic symbols. */ | |
5690 | unsigned long r_symndx = ELF32_R_SYM (rela->r_info); | |
c428ce9d L |
5691 | if (r_symndx != STN_UNDEF) |
5692 | { | |
5693 | Elf_Internal_Sym sym; | |
5694 | if (!bed->s->swap_symbol_in (abfd, | |
5695 | (htab->dynsym->contents | |
5696 | + r_symndx * sizeof (Elf32_External_Sym)), | |
5697 | 0, &sym)) | |
5698 | abort (); | |
d9e3b590 | 5699 | |
c428ce9d L |
5700 | if (ELF32_ST_TYPE (sym.st_info) == STT_GNU_IFUNC) |
5701 | return reloc_class_ifunc; | |
5702 | } | |
d9e3b590 | 5703 | } |
cae1fbbb | 5704 | |
55fd94b0 | 5705 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 | 5706 | { |
c428ce9d L |
5707 | case R_386_IRELATIVE: |
5708 | return reloc_class_ifunc; | |
38701953 AM |
5709 | case R_386_RELATIVE: |
5710 | return reloc_class_relative; | |
5711 | case R_386_JUMP_SLOT: | |
5712 | return reloc_class_plt; | |
5713 | case R_386_COPY: | |
5714 | return reloc_class_copy; | |
5715 | default: | |
5716 | return reloc_class_normal; | |
5717 | } | |
5718 | } | |
5719 | ||
252b5132 RH |
5720 | /* Finish up the dynamic sections. */ |
5721 | ||
b34976b6 | 5722 | static bfd_boolean |
55fd94b0 AM |
5723 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
5724 | struct bfd_link_info *info) | |
252b5132 | 5725 | { |
6725bdbf | 5726 | struct elf_i386_link_hash_table *htab; |
252b5132 | 5727 | bfd *dynobj; |
252b5132 | 5728 | asection *sdyn; |
25e762b9 | 5729 | const struct elf_i386_backend_data *abed; |
252b5132 | 5730 | |
6725bdbf | 5731 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
5732 | if (htab == NULL) |
5733 | return FALSE; | |
5734 | ||
ebe50bae | 5735 | dynobj = htab->elf.dynobj; |
3d4d4302 | 5736 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 5737 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 5738 | |
ebe50bae | 5739 | if (htab->elf.dynamic_sections_created) |
252b5132 | 5740 | { |
252b5132 RH |
5741 | Elf32_External_Dyn *dyncon, *dynconend; |
5742 | ||
6de2ae4a | 5743 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 5744 | abort (); |
252b5132 RH |
5745 | |
5746 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 5747 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
5748 | for (; dyncon < dynconend; dyncon++) |
5749 | { | |
5750 | Elf_Internal_Dyn dyn; | |
51b64d56 | 5751 | asection *s; |
252b5132 RH |
5752 | |
5753 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
5754 | ||
5755 | switch (dyn.d_tag) | |
5756 | { | |
5757 | default: | |
f604c2a2 | 5758 | if (abed->os == is_vxworks |
25e762b9 | 5759 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) |
7a2b07ff | 5760 | break; |
0ac8d2ca | 5761 | continue; |
252b5132 RH |
5762 | |
5763 | case DT_PLTGOT: | |
6de2ae4a | 5764 | s = htab->elf.sgotplt; |
8c37241b | 5765 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
5766 | break; |
5767 | ||
252b5132 | 5768 | case DT_JMPREL: |
6de2ae4a | 5769 | s = htab->elf.srelplt; |
6348e046 | 5770 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
5771 | break; |
5772 | ||
5773 | case DT_PLTRELSZ: | |
6de2ae4a | 5774 | s = htab->elf.srelplt; |
eea6121a | 5775 | dyn.d_un.d_val = s->size; |
252b5132 | 5776 | break; |
252b5132 | 5777 | } |
0ac8d2ca AM |
5778 | |
5779 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
5780 | } |
5781 | ||
6de2ae4a | 5782 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 | 5783 | { |
1f78f649 L |
5784 | /* UnixWare sets the entsize of .plt to 4, although that doesn't |
5785 | really seem like the right value. */ | |
5786 | elf_section_data (htab->elf.splt->output_section) | |
5787 | ->this_hdr.sh_entsize = 4; | |
5788 | ||
f604c2a2 | 5789 | if (htab->plt.has_plt0) |
252b5132 | 5790 | { |
f604c2a2 L |
5791 | /* Fill in the special first entry in the procedure linkage |
5792 | table. */ | |
5793 | memcpy (htab->elf.splt->contents, htab->plt.plt0_entry, | |
5794 | htab->lazy_plt->plt0_entry_size); | |
5795 | memset (htab->elf.splt->contents + htab->lazy_plt->plt0_entry_size, | |
25e762b9 | 5796 | abed->plt0_pad_byte, |
f604c2a2 L |
5797 | htab->plt.plt_entry_size - htab->lazy_plt->plt0_entry_size); |
5798 | if (!bfd_link_pic (info)) | |
eac338cf | 5799 | { |
f604c2a2 L |
5800 | bfd_put_32 (output_bfd, |
5801 | (htab->elf.sgotplt->output_section->vma | |
5802 | + htab->elf.sgotplt->output_offset | |
5803 | + 4), | |
5804 | htab->elf.splt->contents | |
5805 | + htab->lazy_plt->plt0_got1_offset); | |
5806 | bfd_put_32 (output_bfd, | |
5807 | (htab->elf.sgotplt->output_section->vma | |
5808 | + htab->elf.sgotplt->output_offset | |
5809 | + 8), | |
5810 | htab->elf.splt->contents | |
5811 | + htab->lazy_plt->plt0_got2_offset); | |
eac338cf | 5812 | |
f604c2a2 | 5813 | if (abed->os == is_vxworks) |
1f78f649 | 5814 | { |
f604c2a2 L |
5815 | Elf_Internal_Rela rel; |
5816 | int num_plts = (htab->elf.splt->size | |
5817 | / htab->plt.plt_entry_size) - 1; | |
5818 | unsigned char *p; | |
5819 | ||
5820 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
5821 | + 4. On IA32 we use REL relocations so the | |
5822 | addend goes in the PLT directly. */ | |
5823 | rel.r_offset = (htab->elf.splt->output_section->vma | |
5824 | + htab->elf.splt->output_offset | |
5825 | + htab->lazy_plt->plt0_got1_offset); | |
1f78f649 L |
5826 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, |
5827 | R_386_32); | |
f604c2a2 L |
5828 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5829 | htab->srelplt2->contents); | |
5830 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ | |
5831 | + 8. */ | |
5832 | rel.r_offset = (htab->elf.splt->output_section->vma | |
5833 | + htab->elf.splt->output_offset | |
5834 | + htab->lazy_plt->plt0_got2_offset); | |
5835 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
1f78f649 | 5836 | R_386_32); |
f604c2a2 L |
5837 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
5838 | htab->srelplt2->contents + | |
5839 | sizeof (Elf32_External_Rel)); | |
5840 | /* Correct the .rel.plt.unloaded relocations. */ | |
5841 | p = htab->srelplt2->contents; | |
5842 | if (bfd_link_pic (info)) | |
5843 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
5844 | else | |
5845 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
5846 | ||
5847 | for (; num_plts; num_plts--) | |
5848 | { | |
5849 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
5850 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, | |
5851 | R_386_32); | |
5852 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
5853 | p += sizeof (Elf32_External_Rel); | |
5854 | ||
5855 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
5856 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, | |
5857 | R_386_32); | |
5858 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); | |
5859 | p += sizeof (Elf32_External_Rel); | |
5860 | } | |
1f78f649 | 5861 | } |
eac338cf PB |
5862 | } |
5863 | } | |
252b5132 | 5864 | } |
f604c2a2 L |
5865 | |
5866 | if (htab->plt_got != NULL && htab->plt_got->size > 0) | |
5867 | elf_section_data (htab->plt_got->output_section) | |
5868 | ->this_hdr.sh_entsize = htab->non_lazy_plt->plt_entry_size; | |
252b5132 RH |
5869 | } |
5870 | ||
f604c2a2 L |
5871 | /* Fill in the first three entries in the global offset table. */ |
5872 | if (htab->elf.sgotplt && htab->elf.sgotplt->size > 0) | |
252b5132 | 5873 | { |
56d4289c L |
5874 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
5875 | { | |
4eca0228 | 5876 | _bfd_error_handler |
56d4289c L |
5877 | (_("discarded output section: `%A'"), htab->elf.sgotplt); |
5878 | return FALSE; | |
5879 | } | |
5880 | ||
f604c2a2 L |
5881 | bfd_put_32 (output_bfd, |
5882 | (sdyn == NULL ? 0 | |
5883 | : sdyn->output_section->vma + sdyn->output_offset), | |
5884 | htab->elf.sgotplt->contents); | |
5885 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
5886 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
252b5132 | 5887 | |
6de2ae4a | 5888 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 5889 | } |
8c37241b | 5890 | |
e41b3a13 | 5891 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
5892 | if (htab->plt_eh_frame != NULL |
5893 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
5894 | { |
5895 | if (htab->elf.splt != NULL | |
5896 | && htab->elf.splt->size != 0 | |
5897 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5898 | && htab->elf.splt->output_section != NULL | |
5899 | && htab->plt_eh_frame->output_section != NULL) | |
5900 | { | |
5901 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5902 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5903 | + htab->plt_eh_frame->output_offset | |
5904 | + PLT_FDE_START_OFFSET; | |
5905 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5906 | htab->plt_eh_frame->contents | |
5907 | + PLT_FDE_START_OFFSET); | |
5908 | } | |
5909 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5910 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5911 | { |
5912 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5913 | htab->plt_eh_frame, | |
5914 | htab->plt_eh_frame->contents)) | |
5915 | return FALSE; | |
5916 | } | |
5917 | } | |
5918 | ||
fff53dae L |
5919 | /* Adjust .eh_frame for .plt.got section. */ |
5920 | if (htab->plt_got_eh_frame != NULL | |
5921 | && htab->plt_got_eh_frame->contents != NULL) | |
5922 | { | |
5923 | if (htab->plt_got != NULL | |
5924 | && htab->plt_got->size != 0 | |
5925 | && (htab->plt_got->flags & SEC_EXCLUDE) == 0 | |
5926 | && htab->plt_got->output_section != NULL | |
5927 | && htab->plt_got_eh_frame->output_section != NULL) | |
5928 | { | |
5929 | bfd_vma plt_start = htab->plt_got->output_section->vma; | |
5930 | bfd_vma eh_frame_start = htab->plt_got_eh_frame->output_section->vma | |
5931 | + htab->plt_got_eh_frame->output_offset | |
5932 | + PLT_FDE_START_OFFSET; | |
5933 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5934 | htab->plt_got_eh_frame->contents | |
5935 | + PLT_FDE_START_OFFSET); | |
5936 | } | |
5937 | if (htab->plt_got_eh_frame->sec_info_type == SEC_INFO_TYPE_EH_FRAME) | |
5938 | { | |
5939 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5940 | htab->plt_got_eh_frame, | |
5941 | htab->plt_got_eh_frame->contents)) | |
5942 | return FALSE; | |
5943 | } | |
5944 | } | |
5945 | ||
6de2ae4a L |
5946 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5947 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5948 | |
aec6b87e L |
5949 | /* Fill PLT entries for undefined weak symbols in PIE. */ |
5950 | if (bfd_link_pie (info)) | |
5951 | bfd_hash_traverse (&info->hash->table, | |
5952 | elf_i386_pie_finish_undefweak_symbol, | |
5953 | info); | |
5954 | ||
b34976b6 | 5955 | return TRUE; |
252b5132 RH |
5956 | } |
5957 | ||
233cc9c1 L |
5958 | /* Fill PLT/GOT entries and allocate dynamic relocations for local |
5959 | STT_GNU_IFUNC symbols, which aren't in the ELF linker hash table. | |
5960 | It has to be done before elf_link_sort_relocs is called so that | |
5961 | dynamic relocations are properly sorted. */ | |
5962 | ||
5963 | static bfd_boolean | |
5964 | elf_i386_output_arch_local_syms | |
5965 | (bfd *output_bfd ATTRIBUTE_UNUSED, | |
5966 | struct bfd_link_info *info, | |
5967 | void *flaginfo ATTRIBUTE_UNUSED, | |
5968 | int (*func) (void *, const char *, | |
5969 | Elf_Internal_Sym *, | |
5970 | asection *, | |
5971 | struct elf_link_hash_entry *) ATTRIBUTE_UNUSED) | |
5972 | { | |
5973 | struct elf_i386_link_hash_table *htab = elf_i386_hash_table (info); | |
5974 | if (htab == NULL) | |
5975 | return FALSE; | |
5976 | ||
5977 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ | |
5978 | htab_traverse (htab->loc_hash_table, | |
5979 | elf_i386_finish_local_dynamic_symbol, | |
5980 | info); | |
5981 | ||
5982 | return TRUE; | |
5983 | } | |
5984 | ||
f604c2a2 | 5985 | /* Sort relocs into address order. */ |
4c45e5c9 | 5986 | |
f604c2a2 L |
5987 | static int |
5988 | compare_relocs (const void *ap, const void *bp) | |
4c45e5c9 | 5989 | { |
f604c2a2 L |
5990 | const arelent *a = * (const arelent **) ap; |
5991 | const arelent *b = * (const arelent **) bp; | |
3972882e | 5992 | |
f604c2a2 L |
5993 | if (a->address > b->address) |
5994 | return 1; | |
5995 | else if (a->address < b->address) | |
5996 | return -1; | |
5997 | else | |
5998 | return 0; | |
5999 | } | |
6000 | ||
6001 | enum elf_i386_plt_type | |
6002 | { | |
6003 | plt_non_lazy = 0, | |
6004 | plt_lazy = 1 << 0, | |
6005 | plt_pic = 1 << 1, | |
6006 | plt_unknown = -1 | |
6007 | }; | |
6008 | ||
6009 | struct elf_i386_plt | |
6010 | { | |
6011 | const char *name; | |
6012 | asection *sec; | |
6013 | bfd_byte *contents; | |
6014 | enum elf_i386_plt_type type; | |
6015 | unsigned int plt_got_offset; | |
6016 | unsigned int plt_entry_size; | |
6017 | long count; | |
6018 | }; | |
6019 | ||
6020 | /* Forward declaration. */ | |
6021 | static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt; | |
6022 | ||
6023 | /* Similar to _bfd_elf_get_synthetic_symtab. Support PLTs with all | |
6024 | dynamic relocations. */ | |
6025 | ||
6026 | static long | |
6027 | elf_i386_get_synthetic_symtab (bfd *abfd, | |
6028 | long symcount ATTRIBUTE_UNUSED, | |
6029 | asymbol **syms ATTRIBUTE_UNUSED, | |
6030 | long dynsymcount, | |
6031 | asymbol **dynsyms, | |
6032 | asymbol **ret) | |
6033 | { | |
6034 | long size, count, i, n; | |
6035 | int j; | |
6036 | unsigned int plt_got_offset, plt_entry_size; | |
6037 | asymbol *s; | |
6038 | bfd_byte *plt_contents; | |
6039 | long dynrelcount, relsize; | |
6040 | arelent **dynrelbuf; | |
6041 | const struct elf_i386_lazy_plt_layout *lazy_plt; | |
6042 | const struct elf_i386_non_lazy_plt_layout *non_lazy_plt; | |
6043 | asection *plt; | |
6044 | bfd_vma got_addr; | |
6045 | char *names; | |
6046 | enum elf_i386_plt_type plt_type; | |
6047 | struct elf_i386_plt plts[] = | |
3972882e | 6048 | { |
f604c2a2 L |
6049 | { ".plt", NULL, NULL, plt_unknown, 0, 0, 0 }, |
6050 | { ".plt.got", NULL, NULL, plt_non_lazy, 0, 0, 0 }, | |
dd9e66ee | 6051 | { NULL, NULL, NULL, plt_non_lazy, 0, 0, 0 } |
f604c2a2 | 6052 | }; |
144bed8d | 6053 | |
f604c2a2 | 6054 | *ret = NULL; |
144bed8d | 6055 | |
f604c2a2 L |
6056 | if ((abfd->flags & (DYNAMIC | EXEC_P)) == 0) |
6057 | return 0; | |
3972882e | 6058 | |
f604c2a2 L |
6059 | if (dynsymcount <= 0) |
6060 | return 0; | |
cca5b8b6 | 6061 | |
f604c2a2 L |
6062 | relsize = bfd_get_dynamic_reloc_upper_bound (abfd); |
6063 | if (relsize <= 0) | |
6064 | return -1; | |
cca5b8b6 | 6065 | |
f604c2a2 L |
6066 | dynrelbuf = (arelent **) bfd_malloc (relsize); |
6067 | if (dynrelbuf == NULL) | |
6068 | return -1; | |
6069 | ||
6070 | dynrelcount = bfd_canonicalize_dynamic_reloc (abfd, dynrelbuf, | |
6071 | dynsyms); | |
6072 | ||
6073 | /* Sort the relocs by address. */ | |
6074 | qsort (dynrelbuf, dynrelcount, sizeof (arelent *), compare_relocs); | |
6075 | ||
6076 | non_lazy_plt = NULL; | |
6077 | /* Silence GCC 6. */ | |
6078 | lazy_plt = NULL; | |
6079 | switch (get_elf_i386_backend_data (abfd)->os) | |
144bed8d | 6080 | { |
f604c2a2 L |
6081 | case is_normal: |
6082 | non_lazy_plt = &elf_i386_non_lazy_plt; | |
6083 | /* Fall through */ | |
6084 | case is_vxworks: | |
6085 | lazy_plt = &elf_i386_lazy_plt; | |
6086 | break; | |
6087 | case is_nacl: | |
6088 | lazy_plt = &elf_i386_nacl_plt; | |
6089 | break; | |
6090 | } | |
6091 | ||
6092 | got_addr = 0; | |
3972882e | 6093 | |
f604c2a2 L |
6094 | count = 0; |
6095 | for (j = 0; plts[j].name != NULL; j++) | |
6096 | { | |
6097 | plt = bfd_get_section_by_name (abfd, plts[j].name); | |
6098 | if (plt == NULL) | |
6f25f223 | 6099 | continue; |
533d0af0 | 6100 | |
f604c2a2 L |
6101 | /* Get the PLT section contents. */ |
6102 | plt_contents = (bfd_byte *) bfd_malloc (plt->size); | |
6103 | if (plt_contents == NULL) | |
6104 | break; | |
6105 | if (!bfd_get_section_contents (abfd, (asection *) plt, | |
6106 | plt_contents, 0, plt->size)) | |
6107 | { | |
6108 | free (plt_contents); | |
6109 | break; | |
6110 | } | |
6111 | ||
6112 | /* Check what kind of PLT it is. */ | |
6113 | plt_type = plt_unknown; | |
6114 | if (plts[j].type == plt_unknown) | |
6115 | { | |
6116 | /* Match lazy PLT first. */ | |
6117 | if (memcmp (plt_contents, lazy_plt->plt0_entry, | |
6118 | lazy_plt->plt0_got1_offset) == 0) | |
6119 | plt_type = plt_lazy; | |
6120 | else if (memcmp (plt_contents, lazy_plt->pic_plt0_entry, | |
6121 | lazy_plt->plt0_got1_offset) == 0) | |
6122 | plt_type = plt_lazy | plt_pic; | |
6123 | } | |
6124 | ||
6125 | if (non_lazy_plt != NULL | |
6126 | && (plt_type == plt_unknown || plt_type == plt_non_lazy)) | |
6127 | { | |
6128 | /* Match non-lazy PLT. */ | |
6129 | if (memcmp (plt_contents, non_lazy_plt->plt_entry, | |
6130 | non_lazy_plt->plt_got_offset) == 0) | |
6131 | plt_type = plt_non_lazy; | |
6132 | else if (memcmp (plt_contents, non_lazy_plt->pic_plt_entry, | |
6133 | non_lazy_plt->plt_got_offset) == 0) | |
6134 | plt_type = plt_pic; | |
6135 | } | |
6136 | ||
6137 | if (plt_type == plt_unknown) | |
3972882e L |
6138 | continue; |
6139 | ||
f604c2a2 L |
6140 | plts[j].sec = plt; |
6141 | plts[j].type = plt_type; | |
ec1f73bb | 6142 | |
f604c2a2 L |
6143 | if ((plt_type & plt_lazy)) |
6144 | { | |
6145 | plts[j].plt_got_offset = lazy_plt->plt_got_offset; | |
6146 | plts[j].plt_entry_size = lazy_plt->plt_entry_size; | |
6147 | /* Skip PLT0 in lazy PLT. */ | |
6148 | i = 1; | |
6149 | } | |
6150 | else | |
6151 | { | |
6152 | plts[j].plt_got_offset = non_lazy_plt->plt_got_offset; | |
6153 | plts[j].plt_entry_size = non_lazy_plt->plt_entry_size; | |
6154 | i = 0; | |
6155 | } | |
fca6ae69 | 6156 | |
f604c2a2 L |
6157 | n = plt->size / plts[j].plt_entry_size; |
6158 | plts[j].count = n; | |
6159 | count += n - i; | |
6160 | ||
6161 | plts[j].contents = plt_contents; | |
6162 | ||
6163 | /* The _GLOBAL_OFFSET_TABLE_ address is needed. */ | |
6164 | if ((plt_type & plt_pic)) | |
6165 | got_addr = (bfd_vma) -1; | |
144bed8d L |
6166 | } |
6167 | ||
f604c2a2 L |
6168 | size = count * sizeof (asymbol); |
6169 | s = *ret = (asymbol *) bfd_zmalloc (size); | |
6170 | if (s == NULL) | |
6171 | { | |
6172 | bad_return: | |
6173 | for (j = 0; plts[j].name != NULL; j++) | |
6174 | if (plts[j].contents != NULL) | |
6175 | free (plts[j].contents); | |
6176 | free (dynrelbuf); | |
6177 | return -1; | |
6178 | } | |
3972882e | 6179 | |
f604c2a2 L |
6180 | if (got_addr) |
6181 | { | |
6182 | /* Check .got.plt and then .got to get the _GLOBAL_OFFSET_TABLE_ | |
6183 | address. */ | |
6184 | asection *sec = bfd_get_section_by_name (abfd, ".got.plt"); | |
6185 | if (sec != NULL) | |
6186 | got_addr = sec->vma; | |
6187 | else | |
6188 | { | |
6189 | sec = bfd_get_section_by_name (abfd, ".got"); | |
6190 | if (sec != NULL) | |
6191 | got_addr = sec->vma; | |
6192 | } | |
3972882e | 6193 | |
f604c2a2 L |
6194 | if (got_addr == (bfd_vma) -1) |
6195 | goto bad_return; | |
6196 | } | |
3972882e | 6197 | |
f604c2a2 L |
6198 | /* Check for each PLT section. */ |
6199 | size = 0; | |
6200 | n = 0; | |
6201 | for (j = 0; plts[j].name != NULL; j++) | |
6202 | if ((plt_contents = plts[j].contents) != NULL) | |
6203 | { | |
6204 | long k; | |
6205 | bfd_vma offset; | |
6206 | ||
6207 | plt_got_offset = plts[j].plt_got_offset; | |
6208 | plt_entry_size = plts[j].plt_entry_size; | |
6209 | ||
6210 | plt = plts[j].sec; | |
6211 | ||
6212 | if ((plts[j].type & plt_lazy)) | |
6213 | { | |
6214 | /* Skip PLT0 in lazy PLT. */ | |
6215 | k = 1; | |
6216 | offset = plt_entry_size; | |
6217 | } | |
6218 | else | |
6219 | { | |
6220 | k = 0; | |
6221 | offset = 0; | |
6222 | } | |
6223 | ||
6224 | /* Check each PLT entry against dynamic relocations. */ | |
6225 | for (; k < plts[j].count; k++) | |
6226 | { | |
6227 | int off; | |
6228 | bfd_vma got_vma; | |
6229 | long min, max, mid; | |
6230 | arelent *p; | |
6231 | ||
6232 | /* Get the GOT offset, a signed 32-bit integer. */ | |
6233 | off = H_GET_32 (abfd, (plt_contents + offset | |
6234 | + plt_got_offset)); | |
6235 | got_vma = got_addr + off; | |
6236 | ||
6237 | /* Binary search. */ | |
6238 | p = dynrelbuf[0]; | |
6239 | min = 0; | |
6240 | max = dynrelcount; | |
6241 | while ((min + 1) < max) | |
6242 | { | |
6243 | arelent *r; | |
6244 | ||
6245 | mid = (min + max) / 2; | |
6246 | r = dynrelbuf[mid]; | |
6247 | if (got_vma > r->address) | |
6248 | min = mid; | |
6249 | else if (got_vma < r->address) | |
6250 | max = mid; | |
6251 | else | |
6252 | { | |
6253 | p = r; | |
6254 | break; | |
6255 | } | |
6256 | } | |
6257 | ||
6258 | /* Skip unknown relocation. PR 17512: file: bc9d6cf5. */ | |
6259 | if (got_vma == p->address | |
6260 | && p->howto != NULL | |
6261 | && (p->howto->type == R_386_JUMP_SLOT | |
6262 | || p->howto->type == R_386_GLOB_DAT | |
6263 | || p->howto->type == R_386_IRELATIVE)) | |
6264 | { | |
6265 | *s = **p->sym_ptr_ptr; | |
6266 | /* Undefined syms won't have BSF_LOCAL or BSF_GLOBAL | |
6267 | set. Since we are defining a symbol, ensure one | |
6268 | of them is set. */ | |
6269 | if ((s->flags & BSF_LOCAL) == 0) | |
6270 | s->flags |= BSF_GLOBAL; | |
6271 | s->flags |= BSF_SYNTHETIC; | |
6272 | /* This is no longer a section symbol. */ | |
6273 | s->flags &= ~BSF_SECTION_SYM; | |
6274 | s->section = plt; | |
6275 | s->the_bfd = plt->owner; | |
6276 | s->value = offset; | |
6277 | /* Store relocation for later use. */ | |
6278 | s->udata.p = p; | |
6279 | /* Add @plt to function name later. */ | |
6280 | size += strlen (s->name) + sizeof ("@plt"); | |
6281 | if (p->addend != 0) | |
6282 | size += sizeof ("+0x") - 1 + 8; | |
6283 | n++; | |
6284 | s++; | |
6285 | } | |
6286 | offset += plt_entry_size; | |
6287 | } | |
6288 | } | |
6289 | ||
6290 | /* PLT entries with R_386_TLS_DESC relocations are skipped. */ | |
6291 | if (n == 0) | |
6292 | goto bad_return; | |
6293 | ||
6294 | count = n; | |
6295 | ||
6296 | /* Allocate space for @plt suffixes. */ | |
6297 | names = (char *) bfd_malloc (size); | |
6298 | if (s == NULL) | |
6299 | goto bad_return; | |
6300 | ||
6301 | s = *ret; | |
6302 | for (i = 0; i < count; i++) | |
6303 | { | |
6304 | /* Add @plt to function name. */ | |
6305 | arelent *p = (arelent *) s->udata.p; | |
6306 | /* Clear it now. */ | |
6307 | s->udata.p = NULL; | |
6308 | size = strlen (s->name); | |
6309 | memcpy (names, s->name, size); | |
6310 | s->name = names; | |
6311 | names += size; | |
6312 | if (p->addend != 0) | |
6313 | { | |
6314 | char buf[30], *a; | |
6315 | ||
6316 | memcpy (names, "+0x", sizeof ("+0x") - 1); | |
6317 | names += sizeof ("+0x") - 1; | |
6318 | bfd_sprintf_vma (abfd, buf, p->addend); | |
6319 | for (a = buf; *a == '0'; ++a) | |
6320 | ; | |
6321 | size = strlen (a); | |
6322 | memcpy (names, a, size); | |
6323 | names += size; | |
6324 | } | |
6325 | memcpy (names, "@plt", sizeof ("@plt")); | |
6326 | names += sizeof ("@plt"); | |
6327 | s++; | |
6328 | } | |
6329 | ||
6330 | for (j = 0; plts[j].name != NULL; j++) | |
6331 | if (plts[j].contents != NULL) | |
6332 | free (plts[j].contents); | |
6333 | ||
6334 | free (dynrelbuf); | |
6335 | ||
6336 | return count; | |
4c45e5c9 JJ |
6337 | } |
6338 | ||
fdc90cb4 JJ |
6339 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
6340 | ||
6341 | static bfd_boolean | |
6342 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
6343 | { | |
6344 | if (h->plt.offset != (bfd_vma) -1 | |
6345 | && !h->def_regular | |
6346 | && !h->pointer_equality_needed) | |
6347 | return FALSE; | |
6348 | ||
6349 | return _bfd_elf_hash_symbol (h); | |
6350 | } | |
4c45e5c9 | 6351 | |
46bed679 L |
6352 | /* Parse i386 GNU properties. */ |
6353 | ||
6354 | static enum elf_property_kind | |
6355 | elf_i386_parse_gnu_properties (bfd *abfd, unsigned int type, | |
6356 | bfd_byte *ptr, unsigned int datasz) | |
6357 | { | |
6358 | elf_property *prop; | |
6359 | ||
6360 | switch (type) | |
6361 | { | |
6362 | case GNU_PROPERTY_X86_ISA_1_USED: | |
6363 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
6364 | if (datasz != 4) | |
6365 | { | |
6366 | _bfd_error_handler | |
6367 | ((type == GNU_PROPERTY_X86_ISA_1_USED | |
e4097f5e L |
6368 | ? _("error: %B: <corrupt x86 ISA used size: 0x%x>") |
6369 | : _("error: %B: <corrupt x86 ISA needed size: 0x%x>")), | |
46bed679 L |
6370 | abfd, datasz); |
6371 | return property_corrupt; | |
6372 | } | |
6373 | prop = _bfd_elf_get_property (abfd, type, datasz); | |
73caa85d L |
6374 | /* Combine properties of the same type. */ |
6375 | prop->u.number |= bfd_h_get_32 (abfd, ptr); | |
46bed679 L |
6376 | prop->pr_kind = property_number; |
6377 | break; | |
6378 | ||
6379 | default: | |
6380 | return property_ignored; | |
6381 | } | |
6382 | ||
6383 | return property_number; | |
6384 | } | |
6385 | ||
6386 | /* Merge i386 GNU property BPROP with APROP. If APROP isn't NULL, | |
6387 | return TRUE if APROP is updated. Otherwise, return TRUE if BPROP | |
6388 | should be merged with ABFD. */ | |
6389 | ||
6390 | static bfd_boolean | |
6391 | elf_i386_merge_gnu_properties (bfd *abfd ATTRIBUTE_UNUSED, | |
6392 | elf_property *aprop, | |
6393 | elf_property *bprop) | |
6394 | { | |
6395 | unsigned int number; | |
6396 | bfd_boolean updated = FALSE; | |
6397 | unsigned int pr_type = aprop != NULL ? aprop->pr_type : bprop->pr_type; | |
6398 | ||
6399 | switch (pr_type) | |
6400 | { | |
6401 | case GNU_PROPERTY_X86_ISA_1_USED: | |
6402 | case GNU_PROPERTY_X86_ISA_1_NEEDED: | |
6403 | if (aprop != NULL && bprop != NULL) | |
6404 | { | |
6405 | number = aprop->u.number; | |
6406 | aprop->u.number = number | bprop->u.number; | |
6407 | updated = number != (unsigned int) aprop->u.number; | |
6408 | } | |
6409 | else | |
6410 | { | |
6411 | /* Return TRUE if APROP is NULL to indicate that BPROP should | |
6412 | be added to ABFD. */ | |
6413 | updated = aprop == NULL; | |
6414 | } | |
6415 | break; | |
6416 | ||
6417 | default: | |
6418 | /* Never should happen. */ | |
6419 | abort (); | |
6420 | } | |
6421 | ||
6422 | return updated; | |
6423 | } | |
6424 | ||
f604c2a2 L |
6425 | /* Set up i386 GNU properties. Return the first relocatable ELF input |
6426 | with GNU properties if found. Otherwise, return NULL. */ | |
6427 | ||
6428 | static bfd * | |
6429 | elf_i386_link_setup_gnu_properties (struct bfd_link_info *info) | |
6430 | { | |
6431 | bfd_boolean normal_target; | |
6432 | asection *sec, *pltsec; | |
6433 | bfd *dynobj; | |
6434 | unsigned int plt_alignment; | |
6435 | struct elf_i386_link_hash_table *htab; | |
6436 | bfd *pbfd = _bfd_elf_link_setup_gnu_properties (info); | |
6437 | ||
6438 | if (bfd_link_relocatable (info)) | |
6439 | return pbfd; | |
6440 | ||
6441 | htab = elf_i386_hash_table (info); | |
6442 | if (htab == NULL) | |
6443 | return pbfd; | |
6444 | ||
6445 | dynobj = htab->elf.dynobj; | |
6446 | ||
6447 | /* Set htab->elf.dynobj here so that there is no need to check and | |
6448 | set it in check_relocs. */ | |
6449 | if (dynobj == NULL) | |
6450 | { | |
6451 | bfd *abfd; | |
6452 | ||
6453 | /* Find a normal input file to hold linker created | |
6454 | sections. */ | |
6455 | for (abfd = info->input_bfds; | |
6456 | abfd != NULL; | |
6457 | abfd = abfd->link.next) | |
6458 | if ((abfd->flags | |
6459 | & (DYNAMIC | BFD_LINKER_CREATED | BFD_PLUGIN)) == 0) | |
6460 | { | |
6461 | htab->elf.dynobj = abfd; | |
6462 | dynobj = abfd; | |
6463 | break; | |
6464 | } | |
6465 | } | |
6466 | ||
6467 | /* Even when lazy binding is disabled by "-z now", the PLT0 entry may | |
6468 | still be used with LD_AUDIT or LD_PROFILE if PLT entry is used for | |
6469 | canonical function address. */ | |
6470 | htab->plt.has_plt0 = 1; | |
6471 | normal_target = FALSE; | |
6472 | ||
6473 | switch (get_elf_i386_backend_data (info->output_bfd)->os) | |
6474 | { | |
6475 | case is_normal: | |
6476 | htab->lazy_plt = &elf_i386_lazy_plt; | |
6477 | htab->non_lazy_plt = &elf_i386_non_lazy_plt; | |
6478 | normal_target = TRUE; | |
6479 | break; | |
6480 | case is_vxworks: | |
6481 | htab->lazy_plt = &elf_i386_lazy_plt; | |
6482 | htab->non_lazy_plt = NULL; | |
6483 | if (!elf_vxworks_create_dynamic_sections (dynobj, info, | |
6484 | &htab->srelplt2)) | |
6485 | info->callbacks->einfo (_("%F: failed to create VxWorks dynamic sections\n")); | |
6486 | break; | |
6487 | case is_nacl: | |
6488 | htab->lazy_plt = &elf_i386_nacl_plt; | |
6489 | htab->non_lazy_plt = NULL; | |
6490 | break; | |
6491 | } | |
6492 | ||
6493 | pltsec = htab->elf.splt; | |
6494 | ||
6495 | /* If the non-lazy PLT is available, use it for all PLT entries if | |
6496 | there are no PLT0 or no .plt section. */ | |
6497 | if (htab->non_lazy_plt != NULL | |
6498 | && (!htab->plt.has_plt0 || pltsec == NULL)) | |
6499 | { | |
6500 | if (bfd_link_pic (info)) | |
6501 | htab->plt.plt_entry | |
6502 | = htab->non_lazy_plt->pic_plt_entry; | |
6503 | else | |
6504 | htab->plt.plt_entry | |
6505 | = htab->non_lazy_plt->plt_entry; | |
6506 | htab->plt.plt_entry_size | |
6507 | = htab->non_lazy_plt->plt_entry_size; | |
6508 | htab->plt.plt_got_offset | |
6509 | = htab->non_lazy_plt->plt_got_offset; | |
6510 | htab->plt.eh_frame_plt_size | |
6511 | = htab->non_lazy_plt->eh_frame_plt_size; | |
6512 | htab->plt.eh_frame_plt | |
6513 | = htab->non_lazy_plt->eh_frame_plt; | |
6514 | } | |
6515 | else | |
6516 | { | |
6517 | if (bfd_link_pic (info)) | |
6518 | { | |
6519 | htab->plt.plt0_entry | |
6520 | = htab->lazy_plt->pic_plt0_entry; | |
6521 | htab->plt.plt_entry | |
6522 | = htab->lazy_plt->pic_plt_entry; | |
6523 | } | |
6524 | else | |
6525 | { | |
6526 | htab->plt.plt0_entry | |
6527 | = htab->lazy_plt->plt0_entry; | |
6528 | htab->plt.plt_entry | |
6529 | = htab->lazy_plt->plt_entry; | |
6530 | } | |
6531 | htab->plt.plt_entry_size | |
6532 | = htab->lazy_plt->plt_entry_size; | |
6533 | htab->plt.plt_got_offset | |
6534 | = htab->lazy_plt->plt_got_offset; | |
6535 | htab->plt.eh_frame_plt_size | |
6536 | = htab->lazy_plt->eh_frame_plt_size; | |
6537 | htab->plt.eh_frame_plt | |
6538 | = htab->lazy_plt->eh_frame_plt; | |
6539 | } | |
6540 | ||
6541 | /* Return if there are no normal input files. */ | |
6542 | if (dynobj == NULL) | |
6543 | return pbfd; | |
6544 | ||
6545 | /* Since create_dynamic_sections isn't always called, but GOT | |
6546 | relocations need GOT relocations, create them here so that we | |
6547 | don't need to do it in check_relocs. */ | |
6548 | if (htab->elf.sgot == NULL | |
6549 | && !_bfd_elf_create_got_section (dynobj, info)) | |
6550 | info->callbacks->einfo (_("%F: failed to create GOT sections\n")); | |
6551 | ||
6552 | /* Create the ifunc sections here so that check_relocs can be | |
6553 | simplified. */ | |
6554 | if (!_bfd_elf_create_ifunc_sections (dynobj, info)) | |
6555 | info->callbacks->einfo (_("%F: failed to create ifunc sections\n")); | |
6556 | ||
6557 | plt_alignment = bfd_log2 (htab->plt.plt_entry_size); | |
6558 | ||
6559 | if (pltsec != NULL) | |
6560 | { | |
6561 | /* Whe creating executable, set the contents of the .interp | |
6562 | section to the interpreter. */ | |
6563 | if (bfd_link_executable (info) && !info->nointerp) | |
6564 | { | |
6565 | asection *s = bfd_get_linker_section (dynobj, ".interp"); | |
6566 | if (s == NULL) | |
6567 | abort (); | |
6568 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; | |
6569 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
6570 | htab->interp = s; | |
6571 | } | |
6572 | ||
6573 | /* Don't change PLT section alignment for NaCl since it uses | |
6574 | 64-byte PLT entry and sets PLT section alignment to 32 | |
6575 | bytes. */ | |
6576 | if (normal_target) | |
6577 | { | |
6578 | const struct elf_backend_data *bed | |
6579 | = get_elf_backend_data (dynobj); | |
6580 | flagword pltflags = (bed->dynamic_sec_flags | |
6581 | | SEC_ALLOC | |
6582 | | SEC_CODE | |
6583 | | SEC_LOAD | |
6584 | | SEC_READONLY); | |
6585 | unsigned int non_lazy_plt_alignment | |
6586 | = bfd_log2 (htab->non_lazy_plt->plt_entry_size); | |
6587 | ||
6588 | sec = pltsec; | |
6589 | if (!bfd_set_section_alignment (sec->owner, sec, | |
6590 | plt_alignment)) | |
6591 | goto error_alignment; | |
6592 | ||
6593 | /* Create the GOT procedure linkage table. */ | |
6594 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6595 | ".plt.got", | |
6596 | pltflags); | |
6597 | if (sec == NULL) | |
6598 | info->callbacks->einfo (_("%F: failed to create GOT PLT section\n")); | |
6599 | ||
6600 | if (!bfd_set_section_alignment (dynobj, sec, | |
6601 | non_lazy_plt_alignment)) | |
6602 | goto error_alignment; | |
6603 | ||
6604 | htab->plt_got = sec; | |
6605 | } | |
6606 | ||
6607 | if (!info->no_ld_generated_unwind_info) | |
6608 | { | |
6609 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | |
6610 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
6611 | | SEC_LINKER_CREATED); | |
6612 | ||
6613 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6614 | ".eh_frame", | |
6615 | flags); | |
6616 | if (sec == NULL) | |
6617 | info->callbacks->einfo (_("%F: failed to create PLT .eh_frame section\n")); | |
6618 | ||
6619 | if (!bfd_set_section_alignment (dynobj, sec, 2)) | |
6620 | goto error_alignment; | |
6621 | ||
6622 | htab->plt_eh_frame = sec; | |
6623 | ||
6624 | if (htab->plt_got != NULL) | |
6625 | { | |
6626 | sec = bfd_make_section_anyway_with_flags (dynobj, | |
6627 | ".eh_frame", | |
6628 | flags); | |
6629 | if (sec == NULL) | |
6630 | info->callbacks->einfo (_("%F: failed to create GOT PLT .eh_frame section\n")); | |
6631 | ||
6632 | if (!bfd_set_section_alignment (dynobj, sec, 2)) | |
6633 | goto error_alignment; | |
6634 | ||
6635 | htab->plt_got_eh_frame = sec; | |
6636 | } | |
6637 | } | |
6638 | } | |
6639 | ||
6640 | if (normal_target) | |
6641 | { | |
6642 | /* The .iplt section is used for IFUNC symbols in static | |
6643 | executables. */ | |
6644 | sec = htab->elf.iplt; | |
6645 | if (sec != NULL | |
6646 | && !bfd_set_section_alignment (sec->owner, sec, | |
6647 | plt_alignment)) | |
6648 | { | |
6649 | error_alignment: | |
6650 | info->callbacks->einfo (_("%F%A: failed to align section\n"), | |
6651 | sec); | |
6652 | } | |
6653 | } | |
6654 | ||
6655 | return pbfd; | |
6656 | } | |
6657 | ||
6d00b590 | 6658 | #define TARGET_LITTLE_SYM i386_elf32_vec |
252b5132 RH |
6659 | #define TARGET_LITTLE_NAME "elf32-i386" |
6660 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 6661 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
6662 | #define ELF_MACHINE_CODE EM_386 |
6663 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
6664 | |
6665 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 6666 | #define elf_backend_can_refcount 1 |
252b5132 RH |
6667 | #define elf_backend_want_got_plt 1 |
6668 | #define elf_backend_plt_readonly 1 | |
6669 | #define elf_backend_want_plt_sym 0 | |
6670 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 6671 | #define elf_backend_plt_alignment 4 |
64f52338 | 6672 | #define elf_backend_dtrel_excludes_plt 1 |
f7483970 | 6673 | #define elf_backend_extern_protected_data 1 |
bedfd056 | 6674 | #define elf_backend_caches_rawsize 1 |
5474d94f | 6675 | #define elf_backend_want_dynrelro 1 |
252b5132 | 6676 | |
8c29f035 AM |
6677 | /* Support RELA for objdump of prelink objects. */ |
6678 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
6679 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
6680 | ||
13ae64f3 | 6681 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 6682 | |
dd5724d5 AM |
6683 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
6684 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
6685 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
13285a1b | 6686 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
3972882e | 6687 | #define bfd_elf32_get_synthetic_symtab elf_i386_get_synthetic_symtab |
dd5724d5 AM |
6688 | |
6689 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 6690 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 6691 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 6692 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
f604c2a2 | 6693 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
0ac8d2ca | 6694 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
6695 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
6696 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
233cc9c1 | 6697 | #define elf_backend_output_arch_local_syms elf_i386_output_arch_local_syms |
dd5724d5 | 6698 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook |
c5fccbec DJ |
6699 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
6700 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 6701 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
6702 | #define elf_backend_relocate_section elf_i386_relocate_section |
6703 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 6704 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
6705 | #define elf_backend_omit_section_dynsym \ |
6706 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
fdc90cb4 | 6707 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
aec6b87e | 6708 | #define elf_backend_fixup_symbol elf_i386_fixup_symbol |
46bed679 L |
6709 | #define elf_backend_parse_gnu_properties elf_i386_parse_gnu_properties |
6710 | #define elf_backend_merge_gnu_properties elf_i386_merge_gnu_properties | |
f604c2a2 | 6711 | #define elf_backend_setup_gnu_properties elf_i386_link_setup_gnu_properties |
dd5724d5 | 6712 | |
252b5132 | 6713 | #include "elf32-target.h" |
2bc3c89a AM |
6714 | |
6715 | /* FreeBSD support. */ | |
6716 | ||
6717 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6718 | #define TARGET_LITTLE_SYM i386_elf32_fbsd_vec |
2bc3c89a AM |
6719 | #undef TARGET_LITTLE_NAME |
6720 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
6721 | #undef ELF_OSABI |
6722 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
6723 | |
6724 | /* The kernel recognizes executables as valid only if they carry a | |
6725 | "FreeBSD" label in the ELF header. So we put this label on all | |
6726 | executables and (for simplicity) also all other object files. */ | |
6727 | ||
2bc3c89a | 6728 | static void |
d8045f23 | 6729 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 6730 | { |
78245035 | 6731 | _bfd_elf_post_process_headers (abfd, info); |
2bc3c89a | 6732 | |
2bc3c89a | 6733 | #ifdef OLD_FREEBSD_ABI_LABEL |
cf7363b4 L |
6734 | { |
6735 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
6736 | Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd); | |
6737 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
6738 | } | |
caf47ea6 | 6739 | #endif |
2bc3c89a AM |
6740 | } |
6741 | ||
6742 | #undef elf_backend_post_process_headers | |
d8045f23 | 6743 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
6744 | #undef elf32_bed |
6745 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 6746 | |
d8045f23 NC |
6747 | #undef elf_backend_add_symbol_hook |
6748 | ||
2bc3c89a | 6749 | #include "elf32-target.h" |
eac338cf | 6750 | |
a6cc6b3b RO |
6751 | /* Solaris 2. */ |
6752 | ||
6753 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6754 | #define TARGET_LITTLE_SYM i386_elf32_sol2_vec |
a6cc6b3b RO |
6755 | #undef TARGET_LITTLE_NAME |
6756 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
6757 | ||
914082d1 L |
6758 | #undef elf_backend_post_process_headers |
6759 | ||
a6cc6b3b RO |
6760 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE |
6761 | objects won't be recognized. */ | |
6762 | #undef ELF_OSABI | |
6763 | ||
6764 | #undef elf32_bed | |
6765 | #define elf32_bed elf32_i386_sol2_bed | |
6766 | ||
7dc98aea RO |
6767 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
6768 | boundary. */ | |
84865015 | 6769 | #undef elf_backend_static_tls_alignment |
7dc98aea RO |
6770 | #define elf_backend_static_tls_alignment 8 |
6771 | ||
a6cc6b3b RO |
6772 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
6773 | ||
6774 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
6775 | File, p.63. */ | |
84865015 | 6776 | #undef elf_backend_want_plt_sym |
a6cc6b3b RO |
6777 | #define elf_backend_want_plt_sym 1 |
6778 | ||
84865015 NC |
6779 | #undef elf_backend_strtab_flags |
6780 | #define elf_backend_strtab_flags SHF_STRINGS | |
6781 | ||
5522f910 NC |
6782 | /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which |
6783 | has a type >= SHT_LOOS. Returns TRUE if these fields were initialised | |
6784 | FALSE otherwise. ISECTION is the best guess matching section from the | |
6785 | input bfd IBFD, but it might be NULL. */ | |
6786 | ||
84865015 | 6787 | static bfd_boolean |
5522f910 NC |
6788 | elf32_i386_copy_solaris_special_section_fields (const bfd *ibfd ATTRIBUTE_UNUSED, |
6789 | bfd *obfd ATTRIBUTE_UNUSED, | |
6790 | const Elf_Internal_Shdr *isection ATTRIBUTE_UNUSED, | |
6791 | Elf_Internal_Shdr *osection ATTRIBUTE_UNUSED) | |
84865015 NC |
6792 | { |
6793 | /* PR 19938: FIXME: Need to add code for setting the sh_info | |
5522f910 NC |
6794 | and sh_link fields of Solaris specific section types. */ |
6795 | return FALSE; | |
84865015 | 6796 | |
5522f910 | 6797 | /* Based upon Oracle Solaris 11.3 Linkers and Libraries Guide, Ch. 13, |
84865015 NC |
6798 | Object File Format, Table 13-9 ELF sh_link and sh_info Interpretation: |
6799 | ||
6800 | http://docs.oracle.com/cd/E53394_01/html/E54813/chapter6-94076.html#scrolltoc | |
6801 | ||
6802 | The following values should be set: | |
6803 | ||
6804 | Type Link Info | |
6805 | ----------------------------------------------------------------------------- | |
6806 | SHT_SUNW_ancillary The section header index of 0 | |
6807 | [0x6fffffee] the associated string table. | |
6808 | ||
6809 | SHT_SUNW_capinfo The section header index of For a dynamic object, the | |
6810 | [0x6ffffff0] the associated symbol table. section header index of | |
6811 | the associated | |
6812 | SHT_SUNW_capchain table, | |
6813 | otherwise 0. | |
6814 | ||
6815 | SHT_SUNW_symsort The section header index of 0 | |
6816 | [0x6ffffff1] the associated symbol table. | |
6817 | ||
6818 | SHT_SUNW_tlssort The section header index of 0 | |
6819 | [0x6ffffff2] the associated symbol table. | |
6820 | ||
6821 | SHT_SUNW_LDYNSYM The section header index of One greater than the | |
6822 | [0x6ffffff3] the associated string table. symbol table index of the | |
6823 | This index is the same string last local symbol, | |
6824 | table used by the SHT_DYNSYM STB_LOCAL. Since | |
6825 | section. SHT_SUNW_LDYNSYM only | |
6826 | contains local symbols, | |
6827 | sh_info is equivalent to | |
6828 | the number of symbols in | |
6829 | the table. | |
6830 | ||
6831 | SHT_SUNW_cap If symbol capabilities exist, If any capabilities refer | |
6832 | [0x6ffffff5] the section header index of to named strings, the | |
6833 | the associated section header index of | |
6834 | SHT_SUNW_capinfo table, the associated string | |
6835 | otherwise 0. table, otherwise 0. | |
6836 | ||
6837 | SHT_SUNW_move The section header index of 0 | |
6838 | [0x6ffffffa] the associated symbol table. | |
6839 | ||
6840 | SHT_SUNW_COMDAT 0 0 | |
6841 | [0x6ffffffb] | |
6842 | ||
6843 | SHT_SUNW_syminfo The section header index of The section header index | |
6844 | [0x6ffffffc] the associated symbol table. of the associated | |
6845 | .dynamic section. | |
6846 | ||
6847 | SHT_SUNW_verdef The section header index of The number of version | |
6848 | [0x6ffffffd] the associated string table. definitions within the | |
6849 | section. | |
6850 | ||
6851 | SHT_SUNW_verneed The section header index of The number of version | |
6852 | [0x6ffffffe] the associated string table. dependencies within the | |
6853 | section. | |
6854 | ||
6855 | SHT_SUNW_versym The section header index of 0 | |
6856 | [0x6fffffff] the associated symbol table. */ | |
84865015 NC |
6857 | } |
6858 | ||
5522f910 NC |
6859 | #undef elf_backend_copy_special_section_fields |
6860 | #define elf_backend_copy_special_section_fields elf32_i386_copy_solaris_special_section_fields | |
84865015 | 6861 | |
a6cc6b3b RO |
6862 | #include "elf32-target.h" |
6863 | ||
bf64a951 L |
6864 | /* Intel MCU support. */ |
6865 | ||
6866 | static bfd_boolean | |
6867 | elf32_iamcu_elf_object_p (bfd *abfd) | |
6868 | { | |
6869 | /* Set the right machine number for an IAMCU elf32 file. */ | |
6870 | bfd_default_set_arch_mach (abfd, bfd_arch_iamcu, bfd_mach_i386_iamcu); | |
6871 | return TRUE; | |
6872 | } | |
6873 | ||
6874 | #undef TARGET_LITTLE_SYM | |
6875 | #define TARGET_LITTLE_SYM iamcu_elf32_vec | |
6876 | #undef TARGET_LITTLE_NAME | |
6877 | #define TARGET_LITTLE_NAME "elf32-iamcu" | |
84865015 | 6878 | #undef ELF_ARCH |
bf64a951 L |
6879 | #define ELF_ARCH bfd_arch_iamcu |
6880 | ||
6881 | #undef ELF_MACHINE_CODE | |
6882 | #define ELF_MACHINE_CODE EM_IAMCU | |
6883 | ||
6884 | #undef ELF_OSABI | |
6885 | ||
6886 | #undef elf32_bed | |
6887 | #define elf32_bed elf32_iamcu_bed | |
6888 | ||
6889 | #undef elf_backend_object_p | |
6890 | #define elf_backend_object_p elf32_iamcu_elf_object_p | |
6891 | ||
6892 | #undef elf_backend_static_tls_alignment | |
6893 | ||
6894 | #undef elf_backend_want_plt_sym | |
6895 | #define elf_backend_want_plt_sym 0 | |
6896 | ||
84865015 | 6897 | #undef elf_backend_strtab_flags |
5522f910 | 6898 | #undef elf_backend_copy_special_section_fields |
84865015 | 6899 | |
bf64a951 L |
6900 | #include "elf32-target.h" |
6901 | ||
6902 | /* Restore defaults. */ | |
6903 | #undef ELF_ARCH | |
6904 | #define ELF_ARCH bfd_arch_i386 | |
6905 | #undef ELF_MACHINE_CODE | |
6906 | #define ELF_MACHINE_CODE EM_386 | |
6907 | ||
a27e4371 RM |
6908 | /* Native Client support. */ |
6909 | ||
6910 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 6911 | #define TARGET_LITTLE_SYM i386_elf32_nacl_vec |
a27e4371 RM |
6912 | #undef TARGET_LITTLE_NAME |
6913 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
6914 | #undef elf32_bed | |
6915 | #define elf32_bed elf32_i386_nacl_bed | |
6916 | ||
6917 | #undef ELF_MAXPAGESIZE | |
6918 | #define ELF_MAXPAGESIZE 0x10000 | |
6919 | ||
6920 | /* Restore defaults. */ | |
6921 | #undef ELF_OSABI | |
6922 | #undef elf_backend_want_plt_sym | |
6923 | #define elf_backend_want_plt_sym 0 | |
6924 | #undef elf_backend_post_process_headers | |
a27e4371 RM |
6925 | #undef elf_backend_static_tls_alignment |
6926 | ||
6927 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
6928 | ||
6929 | #undef elf_backend_plt_alignment | |
6930 | #define elf_backend_plt_alignment 5 | |
6931 | #define NACL_PLT_ENTRY_SIZE 64 | |
6932 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
6933 | ||
6934 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
6935 | { | |
6936 | 0xff, 0x35, /* pushl contents of address */ | |
6937 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
6938 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6939 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
6940 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6941 | 0xff, 0xe1 /* jmp *%ecx */ | |
6942 | }; | |
6943 | ||
6944 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6945 | { | |
6946 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
6947 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
6948 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
6949 | 0xff, 0xe1, /* jmp *%ecx */ | |
6950 | ||
6951 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6952 | 0x90, | |
6953 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6954 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6955 | ||
6956 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6957 | 0x68, /* pushl immediate */ | |
6958 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
6959 | 0xe9, /* jmp relative */ | |
6960 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
6961 | ||
6962 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6963 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6964 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6965 | 0x90, 0x90 | |
6966 | }; | |
6967 | ||
6968 | static const bfd_byte | |
6969 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
6970 | { | |
6971 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
6972 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
6973 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
6974 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
6975 | |
6976 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
6977 | so pad to that size with nop instructions. */ | |
6978 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
6979 | }; |
6980 | ||
6981 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
6982 | { | |
6983 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
6984 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
6985 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
6986 | 0xff, 0xe1, /* jmp *%ecx */ | |
6987 | ||
6988 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
6989 | 0x90, | |
6990 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6991 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
6992 | ||
6993 | /* Lazy GOT entries point here (32-byte aligned). */ | |
6994 | 0x68, /* pushl immediate */ | |
6995 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
6996 | 0xe9, /* jmp relative */ | |
6997 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
6998 | ||
6999 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
7000 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
7001 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
7002 | 0x90, 0x90 | |
7003 | }; | |
7004 | ||
7005 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
7006 | { | |
7007 | #if (PLT_CIE_LENGTH != 20 \ | |
7008 | || PLT_FDE_LENGTH != 36 \ | |
7009 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
7010 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
7011 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
7012 | #endif | |
7013 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
7014 | 0, 0, 0, 0, /* CIE ID */ | |
7015 | 1, /* CIE version */ | |
7016 | 'z', 'R', 0, /* Augmentation string */ | |
7017 | 1, /* Code alignment factor */ | |
7018 | 0x7c, /* Data alignment factor: -4 */ | |
7019 | 8, /* Return address column */ | |
7020 | 1, /* Augmentation size */ | |
7021 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
7022 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
7023 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
7024 | DW_CFA_nop, DW_CFA_nop, | |
7025 | ||
7026 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
7027 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
7028 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
7029 | 0, 0, 0, 0, /* .plt size goes here */ | |
7030 | 0, /* Augmentation size */ | |
7031 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
7032 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
7033 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
7034 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
7035 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
7036 | 13, /* Block length */ | |
7037 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
7038 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
7039 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
7040 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
7041 | DW_CFA_nop, DW_CFA_nop | |
7042 | }; | |
7043 | ||
f604c2a2 | 7044 | static const struct elf_i386_lazy_plt_layout elf_i386_nacl_plt = |
a27e4371 RM |
7045 | { |
7046 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
7047 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
7048 | 2, /* plt0_got1_offset */ | |
7049 | 8, /* plt0_got2_offset */ | |
7050 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
7051 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
7052 | 2, /* plt_got_offset */ | |
7053 | 33, /* plt_reloc_offset */ | |
7054 | 38, /* plt_plt_offset */ | |
7055 | 32, /* plt_lazy_offset */ | |
7056 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
7057 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
7058 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
f604c2a2 | 7059 | sizeof (elf_i386_nacl_eh_frame_plt) /* eh_frame_plt_size */ |
a27e4371 RM |
7060 | }; |
7061 | ||
7062 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
7063 | { | |
f604c2a2 L |
7064 | 0x90, /* plt0_pad_byte: nop insn */ |
7065 | is_nacl /* os */ | |
a27e4371 RM |
7066 | }; |
7067 | ||
64b384e1 RM |
7068 | static bfd_boolean |
7069 | elf32_i386_nacl_elf_object_p (bfd *abfd) | |
7070 | { | |
7071 | /* Set the right machine number for a NaCl i386 ELF32 file. */ | |
7072 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_i386_i386_nacl); | |
7073 | return TRUE; | |
7074 | } | |
7075 | ||
a27e4371 RM |
7076 | #undef elf_backend_arch_data |
7077 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
7078 | ||
64b384e1 RM |
7079 | #undef elf_backend_object_p |
7080 | #define elf_backend_object_p elf32_i386_nacl_elf_object_p | |
5a68afcf RM |
7081 | #undef elf_backend_modify_segment_map |
7082 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
7083 | #undef elf_backend_modify_program_headers | |
7084 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
887badb3 RM |
7085 | #undef elf_backend_final_write_processing |
7086 | #define elf_backend_final_write_processing nacl_final_write_processing | |
5a68afcf | 7087 | |
a27e4371 RM |
7088 | #include "elf32-target.h" |
7089 | ||
5a68afcf | 7090 | /* Restore defaults. */ |
64b384e1 | 7091 | #undef elf_backend_object_p |
5a68afcf RM |
7092 | #undef elf_backend_modify_segment_map |
7093 | #undef elf_backend_modify_program_headers | |
887badb3 | 7094 | #undef elf_backend_final_write_processing |
5a68afcf | 7095 | |
eac338cf PB |
7096 | /* VxWorks support. */ |
7097 | ||
7098 | #undef TARGET_LITTLE_SYM | |
6d00b590 | 7099 | #define TARGET_LITTLE_SYM i386_elf32_vxworks_vec |
eac338cf PB |
7100 | #undef TARGET_LITTLE_NAME |
7101 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 7102 | #undef ELF_OSABI |
1587442d L |
7103 | #undef ELF_MAXPAGESIZE |
7104 | #define ELF_MAXPAGESIZE 0x1000 | |
a27e4371 RM |
7105 | #undef elf_backend_plt_alignment |
7106 | #define elf_backend_plt_alignment 4 | |
eac338cf | 7107 | |
23209a78 RM |
7108 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
7109 | { | |
7110 | 0x90, /* plt0_pad_byte */ | |
f604c2a2 | 7111 | is_vxworks /* os */ |
23209a78 | 7112 | }; |
eac338cf | 7113 | |
23209a78 RM |
7114 | #undef elf_backend_arch_data |
7115 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 7116 | |
13285a1b | 7117 | #undef elf_backend_relocs_compatible |
eac338cf PB |
7118 | #undef elf_backend_add_symbol_hook |
7119 | #define elf_backend_add_symbol_hook \ | |
7120 | elf_vxworks_add_symbol_hook | |
7121 | #undef elf_backend_link_output_symbol_hook | |
7122 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 7123 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
7124 | #undef elf_backend_emit_relocs |
7125 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
7126 | #undef elf_backend_final_write_processing | |
7127 | #define elf_backend_final_write_processing \ | |
7128 | elf_vxworks_final_write_processing | |
7dc98aea | 7129 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
7130 | |
7131 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
7132 | define it. */ | |
7133 | #undef elf_backend_want_plt_sym | |
7134 | #define elf_backend_want_plt_sym 1 | |
7135 | ||
7136 | #undef elf32_bed | |
7137 | #define elf32_bed elf32_i386_vxworks_bed | |
7138 | ||
7139 | #include "elf32-target.h" |